1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2016 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"
33 #include "c-family/c-target.h"
36 #include "stringpool.h"
38 #include "stor-layout.h"
42 #include "tree-iterator.h"
46 #include "c-family/c-objc.h"
47 #include "c-family/c-pragma.h"
48 #include "c-family/c-ubsan.h"
54 /* Possible cases of bad specifiers type used by bad_specifiers. */
56 BSP_VAR
, /* variable */
57 BSP_PARM
, /* parameter */
62 static const char *redeclaration_error_message (tree
, tree
);
64 static int decl_jump_unsafe (tree
);
65 static void require_complete_types_for_parms (tree
);
66 static int ambi_op_p (enum tree_code
);
67 static int unary_op_p (enum tree_code
);
68 static void push_local_name (tree
);
69 static tree
grok_reference_init (tree
, tree
, tree
, int);
70 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
72 static int check_static_variable_definition (tree
, tree
);
73 static void record_unknown_type (tree
, const char *);
74 static tree
builtin_function_1 (tree
, tree
, bool);
75 static int member_function_or_else (tree
, tree
, enum overload_flags
);
76 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
78 static void check_for_uninitialized_const_var (tree
);
79 static tree
local_variable_p_walkfn (tree
*, int *, void *);
80 static tree
record_builtin_java_type (const char *, int);
81 static const char *tag_name (enum tag_types
);
82 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
83 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
84 static void maybe_deduce_size_from_array_init (tree
, tree
);
85 static void layout_var_decl (tree
);
86 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
87 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
88 static void save_function_data (tree
);
89 static void copy_type_enum (tree
, tree
);
90 static void check_function_type (tree
, tree
);
91 static void finish_constructor_body (void);
92 static void begin_destructor_body (void);
93 static void finish_destructor_body (void);
94 static void record_key_method_defined (tree
);
95 static tree
create_array_type_for_decl (tree
, tree
, tree
);
96 static tree
get_atexit_node (void);
97 static tree
get_dso_handle_node (void);
98 static tree
start_cleanup_fn (void);
99 static void end_cleanup_fn (void);
100 static tree
cp_make_fname_decl (location_t
, tree
, int);
101 static void initialize_predefined_identifiers (void);
102 static tree check_special_function_return_type
103 (special_function_kind
, tree
, tree
, int, const location_t
*);
104 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
105 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
106 static void store_parm_decls (tree
);
107 static void initialize_local_var (tree
, tree
);
108 static void expand_static_init (tree
, tree
);
110 /* The following symbols are subsumed in the cp_global_trees array, and
111 listed here individually for documentation purposes.
114 tree wchar_decl_node;
116 tree vtable_entry_type;
117 tree delta_type_node;
118 tree __t_desc_type_node;
120 tree class_type_node;
121 tree unknown_type_node;
123 Array type `vtable_entry_type[]'
126 tree vtbl_ptr_type_node;
133 A FUNCTION_DECL which can call `abort'. Not necessarily the
134 one that the user will declare, but sufficient to be called
135 by routines that want to abort the program.
140 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
141 tree tinfo_var_id; */
143 tree cp_global_trees
[CPTI_MAX
];
145 /* Indicates that there is a type value in some namespace, although
146 that is not necessarily in scope at the moment. */
148 tree global_type_node
;
150 /* The node that holds the "name" of the global scope. */
151 tree global_scope_name
;
153 #define local_names cp_function_chain->x_local_names
155 /* A list of objects which have constructors or destructors
156 which reside in the global scope. The decl is stored in
157 the TREE_VALUE slot and the initializer is stored
158 in the TREE_PURPOSE slot. */
159 tree static_aggregates
;
161 /* Like static_aggregates, but for thread_local variables. */
166 /* A node for the integer constant 2. */
168 tree integer_two_node
;
170 /* Used only for jumps to as-yet undefined labels, since jumps to
171 defined labels can have their validity checked immediately. */
173 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
174 struct named_label_use_entry
*next
;
175 /* The binding level to which this entry is *currently* attached.
176 This is initially the binding level in which the goto appeared,
177 but is modified as scopes are closed. */
178 cp_binding_level
*binding_level
;
179 /* The head of the names list that was current when the goto appeared,
180 or the inner scope popped. These are the decls that will *not* be
181 skipped when jumping to the label. */
183 /* The location of the goto, for error reporting. */
184 location_t o_goto_locus
;
185 /* True if an OpenMP structured block scope has been closed since
186 the goto appeared. This means that the branch from the label will
187 illegally exit an OpenMP scope. */
191 /* A list of all LABEL_DECLs in the function that have names. Here so
192 we can clear out their names' definitions at the end of the
193 function, and so we can check the validity of jumps to these labels. */
195 struct GTY((for_user
)) named_label_entry
{
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 cp_binding_level
*binding_level
;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A vector of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
209 vec
<tree
, va_gc
> *bad_decls
;
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry
*uses
;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
220 bool in_transaction_scope
;
223 #define named_labels cp_function_chain->x_named_labels
225 /* The number of function bodies which we are currently processing.
226 (Zero if we are at namespace scope, one inside the body of a
227 function, two inside the body of a function in a local class, etc.) */
230 /* States indicating how grokdeclarator() should handle declspecs marked
231 with __attribute__((deprecated)). An object declared as
232 __attribute__((deprecated)) suppresses warnings of uses of other
234 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
237 /* A list of VAR_DECLs whose type was incomplete at the time the
238 variable was declared. */
240 struct GTY(()) incomplete_var
{
242 tree incomplete_type
;
246 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes
)
255 int n_template_parm_scopes
= 0;
256 int seen_specialization_p
= 0;
257 int innermost_specialization_p
= 0;
260 /* Scan through the template parameter scopes. */
261 for (b
= current_binding_level
;
262 b
->kind
== sk_template_parms
;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b
->explicit_spec_p
)
276 if (n_template_parm_scopes
== 0)
277 innermost_specialization_p
= 1;
279 seen_specialization_p
= 1;
281 else if (seen_specialization_p
== 1)
282 return tsk_invalid_member_spec
;
284 ++n_template_parm_scopes
;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation
)
290 if (n_template_parm_scopes
!= 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst
;
299 return tsk_expl_inst
;
302 if (n_template_parm_scopes
< n_class_scopes
)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms
;
311 else if (n_template_parm_scopes
== n_class_scopes
)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' matches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms
;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label
, tree old_value
)
352 if (!processing_template_decl
)
354 if (DECL_INITIAL (label
) == NULL_TREE
)
358 error ("label %q+D used but not defined", label
);
359 location
= input_location
;
360 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
361 /* Avoid crashing later. */
362 define_label (location
, DECL_NAME (label
));
365 warn_for_unused_label (label
);
368 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
371 /* Push all named labels into a vector, so that we can sort it on DECL_UID
372 to avoid code generation differences. */
375 note_label (named_label_entry
**slot
, vec
<named_label_entry
**> &labels
)
377 labels
.quick_push (slot
);
381 /* Helper function to sort named label entries in a vector by DECL_UID. */
384 sort_labels (const void *a
, const void *b
)
386 named_label_entry
**slot1
= *(named_label_entry
**const *) a
;
387 named_label_entry
**slot2
= *(named_label_entry
**const *) b
;
388 if (DECL_UID ((*slot1
)->label_decl
) < DECL_UID ((*slot2
)->label_decl
))
390 if (DECL_UID ((*slot1
)->label_decl
) > DECL_UID ((*slot2
)->label_decl
))
395 /* At the end of a function, all labels declared within the function
396 go out of scope. BLOCK is the top-level block for the
400 pop_labels (tree block
)
404 auto_vec
<named_label_entry
**, 32> labels
;
405 named_label_entry
**slot
;
408 /* Push all the labels into a vector and sort them by DECL_UID,
409 so that gaps between DECL_UIDs don't affect code generation. */
410 labels
.reserve_exact (named_labels
->elements ());
411 named_labels
->traverse
<vec
<named_label_entry
**> &, note_label
> (labels
);
412 labels
.qsort (sort_labels
);
413 FOR_EACH_VEC_ELT (labels
, i
, slot
)
415 struct named_label_entry
*ent
= *slot
;
417 pop_label (ent
->label_decl
, NULL_TREE
);
419 /* Put the labels into the "variables" of the top-level block,
420 so debugger can see them. */
421 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
422 BLOCK_VARS (block
) = ent
->label_decl
;
424 named_labels
->clear_slot (slot
);
430 /* At the end of a block with local labels, restore the outer definition. */
433 pop_local_label (tree label
, tree old_value
)
435 struct named_label_entry dummy
;
437 pop_label (label
, old_value
);
439 dummy
.label_decl
= label
;
440 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
441 named_labels
->clear_slot (slot
);
444 /* The following two routines are used to interface to Objective-C++.
445 The binding level is purposely treated as an opaque type. */
448 objc_get_current_scope (void)
450 return current_binding_level
;
453 /* The following routine is used by the NeXT-style SJLJ exceptions;
454 variables get marked 'volatile' so as to not be clobbered by
455 _setjmp()/_longjmp() calls. All variables in the current scope,
456 as well as parent scopes up to (but not including) ENCLOSING_BLK
457 shall be thusly marked. */
460 objc_mark_locals_volatile (void *enclosing_blk
)
462 cp_binding_level
*scope
;
464 for (scope
= current_binding_level
;
465 scope
&& scope
!= enclosing_blk
;
466 scope
= scope
->level_chain
)
470 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
471 objc_volatilize_decl (decl
);
473 /* Do not climb up past the current function. */
474 if (scope
->kind
== sk_function_parms
)
479 /* Update data for defined and undefined labels when leaving a scope. */
482 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
484 named_label_entry
*ent
= *slot
;
485 cp_binding_level
*obl
= bl
->level_chain
;
487 if (ent
->binding_level
== bl
)
491 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
492 TREE_LISTs representing OVERLOADs, so be careful. */
493 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
495 : TREE_CHAIN (decl
)))
496 if (decl_jump_unsafe (decl
))
497 vec_safe_push (ent
->bad_decls
, decl
);
499 ent
->binding_level
= obl
;
500 ent
->names_in_scope
= obl
->names
;
504 ent
->in_try_scope
= true;
507 ent
->in_catch_scope
= true;
510 ent
->in_omp_scope
= true;
513 ent
->in_transaction_scope
= true;
521 struct named_label_use_entry
*use
;
523 for (use
= ent
->uses
; use
; use
= use
->next
)
524 if (use
->binding_level
== bl
)
526 use
->binding_level
= obl
;
527 use
->names_in_scope
= obl
->names
;
528 if (bl
->kind
== sk_omp
)
529 use
->in_omp_scope
= true;
536 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
537 when errors were reported, except for -Werror-unused-but-set-*. */
538 static int unused_but_set_errorcount
;
540 /* Exit a binding level.
541 Pop the level off, and restore the state of the identifier-decl mappings
542 that were in effect when this level was entered.
544 If KEEP == 1, this level had explicit declarations, so
545 and create a "block" (a BLOCK node) for the level
546 to record its declarations and subblocks for symbol table output.
548 If FUNCTIONBODY is nonzero, this level is the body of a function,
549 so create a block as if KEEP were set and also clear out all
552 If REVERSE is nonzero, reverse the order of decls before putting
553 them into the BLOCK. */
556 poplevel (int keep
, int reverse
, int functionbody
)
559 /* The chain of decls was accumulated in reverse order.
560 Put it into forward order, just for cleanliness. */
565 int leaving_for_scope
;
568 cp_label_binding
*label_bind
;
570 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
575 gcc_assert (current_binding_level
->kind
!= sk_class
);
577 if (current_binding_level
->kind
== sk_cleanup
)
579 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
581 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
583 /* We used to use KEEP == 2 to indicate that the new block should go
584 at the beginning of the list of blocks at this binding level,
585 rather than the end. This hack is no longer used. */
586 gcc_assert (keep
== 0 || keep
== 1);
588 if (current_binding_level
->keep
)
591 /* Any uses of undefined labels, and any defined labels, now operate
592 under constraints of next binding contour. */
593 if (cfun
&& !functionbody
&& named_labels
)
594 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
595 (current_binding_level
);
597 /* Get the decls in the order they were written.
598 Usually current_binding_level->names is in reverse order.
599 But parameter decls were previously put in forward order. */
602 current_binding_level
->names
603 = decls
= nreverse (current_binding_level
->names
);
605 decls
= current_binding_level
->names
;
607 /* If there were any declarations or structure tags in that level,
608 or if this level is a function body,
609 create a BLOCK to record them for the life of this function. */
611 /* Avoid function body block if possible. */
612 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
614 else if (keep
== 1 || functionbody
)
615 block
= make_node (BLOCK
);
616 if (block
!= NULL_TREE
)
618 BLOCK_VARS (block
) = decls
;
619 BLOCK_SUBBLOCKS (block
) = subblocks
;
622 /* In each subblock, record that this is its superior. */
624 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
625 BLOCK_SUPERCONTEXT (link
) = block
;
627 /* We still support the old for-scope rules, whereby the variables
628 in a for-init statement were in scope after the for-statement
629 ended. We only use the new rules if flag_new_for_scope is
632 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
634 /* Before we remove the declarations first check for unused variables. */
635 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
636 && current_binding_level
->kind
!= sk_template_parms
637 && !processing_template_decl
)
638 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
640 /* There are cases where D itself is a TREE_LIST. See in
641 push_local_binding where the list of decls returned by
642 getdecls is built. */
643 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
644 tree type
= TREE_TYPE (decl
);
646 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
647 && ! DECL_IN_SYSTEM_HEADER (decl
)
648 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
649 && type
!= error_mark_node
650 && (!CLASS_TYPE_P (type
)
651 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
652 || lookup_attribute ("warn_unused",
653 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
655 if (! TREE_USED (decl
))
656 warning_at (DECL_SOURCE_LOCATION (decl
),
657 OPT_Wunused_variable
, "unused variable %qD", decl
);
658 else if (DECL_CONTEXT (decl
) == current_function_decl
659 // For -Wunused-but-set-variable leave references alone.
660 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
661 && errorcount
== unused_but_set_errorcount
)
663 warning_at (DECL_SOURCE_LOCATION (decl
),
664 OPT_Wunused_but_set_variable
,
665 "variable %qD set but not used", decl
);
666 unused_but_set_errorcount
= errorcount
;
671 /* Remove declarations for all the DECLs in this level. */
672 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
674 if (leaving_for_scope
&& VAR_P (link
)
675 /* It's hard to make this ARM compatibility hack play nicely with
676 lambdas, and it really isn't necessary in C++11 mode. */
677 && cxx_dialect
< cxx11
680 tree name
= DECL_NAME (link
);
684 ob
= outer_binding (name
,
685 IDENTIFIER_BINDING (name
),
688 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
690 ns_binding
= NULL_TREE
;
692 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
693 /* We have something like:
698 and we are leaving the `for' scope. There's no reason to
699 keep the binding of the inner `i' in this case. */
700 pop_binding (name
, link
);
701 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
702 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
703 /* Here, we have something like:
711 We must pop the for-scope binding so we know what's a
712 type and what isn't. */
713 pop_binding (name
, link
);
716 /* Mark this VAR_DECL as dead so that we can tell we left it
717 there only for backward compatibility. */
718 DECL_DEAD_FOR_LOCAL (link
) = 1;
720 /* Keep track of what should have happened when we
721 popped the binding. */
724 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
725 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
728 /* Add it to the list of dead variables in the next
729 outermost binding to that we can remove these when we
730 leave that binding. */
732 current_binding_level
->level_chain
->dead_vars_from_for
,
735 /* Although we don't pop the cxx_binding, we do clear
736 its SCOPE since the scope is going away now. */
737 IDENTIFIER_BINDING (name
)->scope
738 = current_binding_level
->level_chain
;
745 /* Remove the binding. */
748 if (TREE_CODE (decl
) == TREE_LIST
)
749 decl
= TREE_VALUE (decl
);
752 if (TREE_CODE (name
) == OVERLOAD
)
753 name
= OVL_FUNCTION (name
);
755 gcc_assert (DECL_P (name
));
756 pop_binding (DECL_NAME (name
), decl
);
760 /* Remove declarations for any `for' variables from inner scopes
761 that we kept around. */
762 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
764 pop_binding (DECL_NAME (decl
), decl
);
766 /* Restore the IDENTIFIER_TYPE_VALUEs. */
767 for (link
= current_binding_level
->type_shadowed
;
768 link
; link
= TREE_CHAIN (link
))
769 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
771 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
772 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
774 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
776 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
777 list if a `using' declaration put them there. The debugging
778 back ends won't understand OVERLOAD, so we remove them here.
779 Because the BLOCK_VARS are (temporarily) shared with
780 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
781 popped all the bindings. */
786 for (d
= &BLOCK_VARS (block
); *d
; )
788 if (TREE_CODE (*d
) == TREE_LIST
)
789 *d
= TREE_CHAIN (*d
);
791 d
= &DECL_CHAIN (*d
);
795 /* If the level being exited is the top level of a function,
796 check over all the labels. */
801 /* Since this is the top level block of a function, the vars are
802 the function's parameters. Don't leave them in the BLOCK
803 because they are found in the FUNCTION_DECL instead. */
804 BLOCK_VARS (block
) = 0;
808 pop_labels (subblocks
);
811 kind
= current_binding_level
->kind
;
812 if (kind
== sk_cleanup
)
816 /* If this is a temporary binding created for a cleanup, then we'll
817 have pushed a statement list level. Pop that, create a new
818 BIND_EXPR for the block, and insert it into the stream. */
819 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
820 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
827 /* The current function is being defined, so its DECL_INITIAL
828 should be error_mark_node. */
829 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
830 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
833 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
835 if (BLOCK_SUBBLOCKS (subblocks
))
836 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
839 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
843 current_binding_level
->blocks
844 = block_chainon (current_binding_level
->blocks
, block
);
846 /* If we did not make a block for the level just exited,
847 any blocks made for inner levels
848 (since they cannot be recorded as subblocks in that level)
849 must be carried forward so they will later become subblocks
850 of something else. */
852 current_binding_level
->blocks
853 = block_chainon (current_binding_level
->blocks
, subblocks
);
855 /* Each and every BLOCK node created here in `poplevel' is important
856 (e.g. for proper debugging information) so if we created one
857 earlier, mark it as "used". */
859 TREE_USED (block
) = 1;
861 /* All temporary bindings created for cleanups are popped silently. */
862 if (kind
== sk_cleanup
)
865 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
869 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
870 itself, calling F for each. The DATA is passed to F as well. */
873 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
876 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
878 result
|= (*f
) (name_space
, data
);
880 for (; current
; current
= DECL_CHAIN (current
))
881 result
|= walk_namespaces_r (current
, f
, data
);
886 /* Walk all the namespaces, calling F for each. The DATA is passed to
890 walk_namespaces (walk_namespaces_fn f
, void* data
)
892 return walk_namespaces_r (global_namespace
, f
, data
);
895 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
898 wrapup_globals_for_namespace (tree name_space
, void* data ATTRIBUTE_UNUSED
)
900 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
901 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
902 tree
*vec
= statics
->address ();
903 int len
= statics
->length ();
905 if (warn_unused_function
)
909 FOR_EACH_VEC_SAFE_ELT (statics
, i
, decl
)
910 if (TREE_CODE (decl
) == FUNCTION_DECL
911 && DECL_INITIAL (decl
) == 0
912 && DECL_EXTERNAL (decl
)
913 && !TREE_PUBLIC (decl
)
914 && !DECL_ARTIFICIAL (decl
)
915 && !TREE_NO_WARNING (decl
))
917 warning (OPT_Wunused_function
,
918 "%q+F declared %<static%> but never defined", decl
);
919 TREE_NO_WARNING (decl
) = 1;
923 /* Write out any globals that need to be output. */
924 return wrapup_global_declarations (vec
, len
);
927 /* In C++, you don't have to write `struct S' to refer to `S'; you
928 can just use `S'. We accomplish this by creating a TYPE_DECL as
929 if the user had written `typedef struct S S'. Create and return
930 the TYPE_DECL for TYPE. */
933 create_implicit_typedef (tree name
, tree type
)
937 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
938 DECL_ARTIFICIAL (decl
) = 1;
939 /* There are other implicit type declarations, like the one *within*
940 a class that allows you to write `S::S'. We must distinguish
942 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
943 TYPE_NAME (type
) = decl
;
944 TYPE_STUB_DECL (type
) = decl
;
949 /* Remember a local name for name-mangling purposes. */
952 push_local_name (tree decl
)
957 timevar_start (TV_NAME_LOOKUP
);
959 name
= DECL_NAME (decl
);
961 nelts
= vec_safe_length (local_names
);
962 for (i
= 0; i
< nelts
; i
++)
964 t
= (*local_names
)[i
];
965 if (DECL_NAME (t
) == name
)
967 if (!DECL_LANG_SPECIFIC (decl
))
968 retrofit_lang_decl (decl
);
969 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
970 if (DECL_DISCRIMINATOR_SET_P (t
))
971 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
973 DECL_DISCRIMINATOR (decl
) = 1;
975 (*local_names
)[i
] = decl
;
976 timevar_stop (TV_NAME_LOOKUP
);
981 vec_safe_push (local_names
, decl
);
982 timevar_stop (TV_NAME_LOOKUP
);
985 /* Subroutine of duplicate_decls: return truthvalue of whether
986 or not types of these decls match.
988 For C++, we must compare the parameter list so that `int' can match
989 `int&' in a parameter position, but `int&' is not confused with
993 decls_match (tree newdecl
, tree olddecl
)
997 if (newdecl
== olddecl
)
1000 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
1001 /* If the two DECLs are not even the same kind of thing, we're not
1002 interested in their types. */
1005 gcc_assert (DECL_P (newdecl
));
1007 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1009 tree f1
= TREE_TYPE (newdecl
);
1010 tree f2
= TREE_TYPE (olddecl
);
1011 tree p1
= TYPE_ARG_TYPES (f1
);
1012 tree p2
= TYPE_ARG_TYPES (f2
);
1015 /* Specializations of different templates are different functions
1016 even if they have the same type. */
1017 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
1018 ? DECL_TI_TEMPLATE (newdecl
)
1020 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
1021 ? DECL_TI_TEMPLATE (olddecl
)
1026 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1027 && ! (DECL_EXTERN_C_P (newdecl
)
1028 && DECL_EXTERN_C_P (olddecl
)))
1031 /* A new declaration doesn't match a built-in one unless it
1032 is also extern "C". */
1033 if (DECL_IS_BUILTIN (olddecl
)
1034 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1037 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1040 /* A declaration with deduced return type should use its pre-deduction
1041 type for declaration matching. */
1042 r2
= fndecl_declared_return_type (olddecl
);
1044 if (same_type_p (TREE_TYPE (f1
), r2
))
1046 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1047 && (DECL_BUILT_IN (olddecl
)
1048 #ifndef NO_IMPLICIT_EXTERN_C
1049 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1050 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1054 types_match
= self_promoting_args_p (p1
);
1055 if (p1
== void_list_node
)
1056 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1058 #ifndef NO_IMPLICIT_EXTERN_C
1059 else if (!prototype_p (f1
)
1060 && (DECL_EXTERN_C_P (olddecl
)
1061 && DECL_IN_SYSTEM_HEADER (olddecl
)
1062 && !DECL_CLASS_SCOPE_P (olddecl
))
1063 && (DECL_EXTERN_C_P (newdecl
)
1064 && DECL_IN_SYSTEM_HEADER (newdecl
)
1065 && !DECL_CLASS_SCOPE_P (newdecl
)))
1067 types_match
= self_promoting_args_p (p2
);
1068 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1074 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1075 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1076 || comp_type_attributes (TREE_TYPE (newdecl
),
1077 TREE_TYPE (olddecl
)) != 0);
1082 /* The decls dont match if they correspond to two different versions
1083 of the same function. Disallow extern "C" functions to be
1084 versions for now. */
1086 && !DECL_EXTERN_C_P (newdecl
)
1087 && !DECL_EXTERN_C_P (olddecl
)
1088 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1090 /* Mark functions as versions if necessary. Modify the mangled decl
1091 name if necessary. */
1092 if (DECL_FUNCTION_VERSIONED (newdecl
)
1093 && DECL_FUNCTION_VERSIONED (olddecl
))
1095 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1097 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1098 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1099 mangle_decl (newdecl
);
1101 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1103 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1104 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1105 mangle_decl (olddecl
);
1107 cgraph_node::record_function_versions (olddecl
, newdecl
);
1111 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1113 tree oldres
= DECL_TEMPLATE_RESULT (olddecl
);
1114 tree newres
= DECL_TEMPLATE_RESULT (newdecl
);
1116 if (TREE_CODE (newres
) != TREE_CODE (oldres
))
1119 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1120 DECL_TEMPLATE_PARMS (olddecl
)))
1123 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1124 types_match
= (same_type_p (TREE_TYPE (oldres
), TREE_TYPE (newres
))
1125 && equivalently_constrained (olddecl
, newdecl
));
1127 // We don't need to check equivalently_constrained for variable and
1128 // function templates because we check it on the results.
1129 types_match
= decls_match (oldres
, newres
);
1133 /* Need to check scope for variable declaration (VAR_DECL).
1134 For typedef (TYPE_DECL), scope is ignored. */
1136 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1138 Two declarations for an object with C language linkage
1139 with the same name (ignoring the namespace that qualify
1140 it) that appear in different namespace scopes refer to
1142 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1145 if (TREE_TYPE (newdecl
) == error_mark_node
)
1146 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1147 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1148 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1149 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1152 types_match
= comptypes (TREE_TYPE (newdecl
),
1153 TREE_TYPE (olddecl
),
1154 COMPARE_REDECLARATION
);
1157 // Normal functions can be constrained, as can variable partial
1159 if (types_match
&& VAR_OR_FUNCTION_DECL_P (newdecl
))
1160 types_match
= equivalently_constrained (newdecl
, olddecl
);
1165 /* If NEWDECL is `static' and an `extern' was seen previously,
1166 warn about it. OLDDECL is the previous declaration.
1168 Note that this does not apply to the C++ case of declaring
1169 a variable `extern const' and then later `const'.
1171 Don't complain about built-in functions, since they are beyond
1172 the user's control. */
1175 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1177 if (TREE_CODE (newdecl
) == TYPE_DECL
1178 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1179 || TREE_CODE (newdecl
) == CONST_DECL
1180 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1183 /* Don't get confused by static member functions; that's a different
1185 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1186 && DECL_STATIC_FUNCTION_P (newdecl
))
1189 /* If the old declaration was `static', or the new one isn't, then
1190 everything is OK. */
1191 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1194 /* It's OK to declare a builtin function as `static'. */
1195 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1196 && DECL_ARTIFICIAL (olddecl
))
1199 if (permerror (DECL_SOURCE_LOCATION (newdecl
),
1200 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1201 inform (DECL_SOURCE_LOCATION (olddecl
),
1202 "previous declaration of %qD", olddecl
);
1205 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1206 function templates. If their exception specifications do not
1207 match, issue a diagnostic. */
1210 check_redeclaration_exception_specification (tree new_decl
,
1213 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1214 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1216 /* Two default specs are equivalent, don't force evaluation. */
1217 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1218 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1221 maybe_instantiate_noexcept (new_decl
);
1222 maybe_instantiate_noexcept (old_decl
);
1223 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1224 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1228 If any declaration of a function has an exception-specification,
1229 all declarations, including the definition and an explicit
1230 specialization, of that function shall have an
1231 exception-specification with the same set of type-ids. */
1232 if (! DECL_IS_BUILTIN (old_decl
)
1233 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1236 = "declaration of %q+F has a different exception specifier";
1237 bool complained
= true;
1238 if (DECL_IN_SYSTEM_HEADER (old_decl
))
1239 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1240 else if (!flag_exceptions
)
1241 /* We used to silently permit mismatched eh specs with
1242 -fno-exceptions, so make them a pedwarn now. */
1243 complained
= pedwarn (0, OPT_Wpedantic
, msg
, new_decl
);
1245 error (msg
, new_decl
);
1247 inform (0, "from previous declaration %q+F", old_decl
);
1251 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1252 Otherwise issue diagnostics. */
1255 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1257 old_decl
= STRIP_TEMPLATE (old_decl
);
1258 new_decl
= STRIP_TEMPLATE (new_decl
);
1259 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1260 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1262 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1263 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1265 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1267 if (DECL_BUILT_IN (old_decl
))
1269 /* Hide a built-in declaration. */
1270 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1271 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1274 /* 7.1.5 [dcl.constexpr]
1275 Note: An explicit specialization can differ from the template
1276 declaration with respect to the constexpr specifier. */
1277 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1278 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1281 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1282 error ("from previous declaration %q+D", old_decl
);
1288 // If OLDDECL and NEWDECL are concept declarations with the same type
1289 // (i.e., and template parameters), but different requirements,
1290 // emit diagnostics and return true. Otherwise, return false.
1292 check_concept_refinement (tree olddecl
, tree newdecl
)
1294 if (!DECL_DECLARED_CONCEPT_P (olddecl
) || !DECL_DECLARED_CONCEPT_P (newdecl
))
1297 tree d1
= DECL_TEMPLATE_RESULT (olddecl
);
1298 tree d2
= DECL_TEMPLATE_RESULT (newdecl
);
1299 if (TREE_CODE (d1
) != TREE_CODE (d2
))
1302 tree t1
= TREE_TYPE (d1
);
1303 tree t2
= TREE_TYPE (d2
);
1304 if (TREE_CODE (d1
) == FUNCTION_DECL
)
1306 if (compparms (TYPE_ARG_TYPES (t1
), TYPE_ARG_TYPES (t2
))
1307 && comp_template_parms (DECL_TEMPLATE_PARMS (olddecl
),
1308 DECL_TEMPLATE_PARMS (newdecl
))
1309 && !equivalently_constrained (olddecl
, newdecl
))
1311 error ("cannot specialize concept %q#D", olddecl
);
1318 /* DECL is a redeclaration of a function or function template. If
1319 it does have default arguments issue a diagnostic. Note: this
1320 function is used to enforce the requirements in C++11 8.3.6 about
1321 no default arguments in redeclarations. */
1324 check_redeclaration_no_default_args (tree decl
)
1326 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1328 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1329 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1330 if (TREE_PURPOSE (t
))
1332 permerror (DECL_SOURCE_LOCATION (decl
),
1333 "redeclaration of %q#D may not have default "
1339 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1340 && lookup_attribute ("gnu_inline", \
1341 DECL_ATTRIBUTES (fn)))
1343 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1344 If the redeclaration is invalid, a diagnostic is issued, and the
1345 error_mark_node is returned. Otherwise, OLDDECL is returned.
1347 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1350 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1353 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1355 unsigned olddecl_uid
= DECL_UID (olddecl
);
1356 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1357 int new_defines_function
= 0;
1358 tree new_template_info
;
1360 if (newdecl
== olddecl
)
1363 types_match
= decls_match (newdecl
, olddecl
);
1365 /* If either the type of the new decl or the type of the old decl is an
1366 error_mark_node, then that implies that we have already issued an
1367 error (earlier) for some bogus type specification, and in that case,
1368 it is rather pointless to harass the user with yet more error message
1369 about the same declaration, so just pretend the types match here. */
1370 if (TREE_TYPE (newdecl
) == error_mark_node
1371 || TREE_TYPE (olddecl
) == error_mark_node
)
1372 return error_mark_node
;
1374 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1375 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1377 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1378 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1379 && check_raw_literal_operator (olddecl
))
1380 error ("literal operator template %q+D conflicts with"
1381 " raw literal operator %qD", newdecl
, olddecl
);
1382 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1383 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1384 && check_raw_literal_operator (newdecl
))
1385 error ("raw literal operator %q+D conflicts with"
1386 " literal operator template %qD", newdecl
, olddecl
);
1389 if (DECL_P (olddecl
)
1390 && TREE_CODE (newdecl
) == FUNCTION_DECL
1391 && TREE_CODE (olddecl
) == FUNCTION_DECL
1392 && diagnose_mismatched_attributes (olddecl
, newdecl
))
1394 if (DECL_INITIAL (olddecl
))
1395 inform (DECL_SOURCE_LOCATION (olddecl
),
1396 "previous definition of %q+D was here", olddecl
);
1398 inform (DECL_SOURCE_LOCATION (olddecl
),
1399 "previous declaration of %qD was here", olddecl
);
1402 /* Check for redeclaration and other discrepancies. */
1403 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1404 && DECL_ARTIFICIAL (olddecl
))
1406 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1407 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1409 /* Avoid warnings redeclaring built-ins which have not been
1410 explicitly declared. */
1411 if (DECL_ANTICIPATED (olddecl
))
1414 /* If you declare a built-in or predefined function name as static,
1415 the old definition is overridden, but optionally warn this was a
1416 bad choice of name. */
1417 if (! TREE_PUBLIC (newdecl
))
1419 warning (OPT_Wshadow
,
1420 DECL_BUILT_IN (olddecl
)
1421 ? G_("shadowing built-in function %q#D")
1422 : G_("shadowing library function %q#D"), olddecl
);
1423 /* Discard the old built-in function. */
1426 /* If the built-in is not ansi, then programs can override
1427 it even globally without an error. */
1428 else if (! DECL_BUILT_IN (olddecl
))
1429 warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1430 "library function %q#D redeclared as non-function %q#D",
1433 error ("declaration of %q+#D conflicts with built-in "
1434 "declaration %q#D", newdecl
, olddecl
);
1437 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1439 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1440 error_at (DECL_SOURCE_LOCATION (newdecl
),
1441 "redeclaration of %<pragma omp declare reduction%>");
1442 inform (DECL_SOURCE_LOCATION (olddecl
),
1443 "previous %<pragma omp declare reduction%> declaration");
1444 return error_mark_node
;
1446 else if (!types_match
)
1448 /* Avoid warnings redeclaring built-ins which have not been
1449 explicitly declared. */
1450 if (DECL_ANTICIPATED (olddecl
))
1452 /* Deal with fileptr_type_node. FILE type is not known
1453 at the time we create the builtins. */
1456 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1457 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1459 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1462 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1464 tree t
= TREE_VALUE (t1
);
1467 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1468 == get_identifier ("FILE")
1469 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1471 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1473 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1474 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1475 types_match
= decls_match (newdecl
, olddecl
);
1477 return duplicate_decls (newdecl
, olddecl
,
1479 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1482 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1485 else if ((DECL_EXTERN_C_P (newdecl
)
1486 && DECL_EXTERN_C_P (olddecl
))
1487 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1488 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1490 /* A near match; override the builtin. */
1492 if (TREE_PUBLIC (newdecl
))
1493 warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1494 "new declaration %q#D ambiguates built-in "
1495 "declaration %q#D", newdecl
, olddecl
);
1497 warning (OPT_Wshadow
,
1498 DECL_BUILT_IN (olddecl
)
1499 ? G_("shadowing built-in function %q#D")
1500 : G_("shadowing library function %q#D"), olddecl
);
1503 /* Discard the old built-in function. */
1506 /* Replace the old RTL to avoid problems with inlining. */
1507 COPY_DECL_RTL (newdecl
, olddecl
);
1509 /* Even if the types match, prefer the new declarations type for
1510 built-ins which have not been explicitly declared, for
1511 exception lists, etc... */
1512 else if (DECL_IS_BUILTIN (olddecl
))
1514 tree type
= TREE_TYPE (newdecl
);
1515 tree attribs
= (*targetm
.merge_type_attributes
)
1516 (TREE_TYPE (olddecl
), type
);
1518 type
= cp_build_type_attribute_variant (type
, attribs
);
1519 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1522 /* If a function is explicitly declared "throw ()", propagate that to
1523 the corresponding builtin. */
1524 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1525 && DECL_ANTICIPATED (olddecl
)
1526 && TREE_NOTHROW (newdecl
)
1527 && !TREE_NOTHROW (olddecl
))
1529 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1530 tree tmpdecl
= builtin_decl_explicit (fncode
);
1531 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1532 TREE_NOTHROW (tmpdecl
) = 1;
1535 /* Whether or not the builtin can throw exceptions has no
1536 bearing on this declarator. */
1537 TREE_NOTHROW (olddecl
) = 0;
1539 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1541 /* If a builtin function is redeclared as `static', merge
1542 the declarations, but make the original one static. */
1543 DECL_THIS_STATIC (olddecl
) = 1;
1544 TREE_PUBLIC (olddecl
) = 0;
1546 /* Make the old declaration consistent with the new one so
1547 that all remnants of the builtin-ness of this function
1548 will be banished. */
1549 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1550 COPY_DECL_RTL (newdecl
, olddecl
);
1553 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1555 /* C++ Standard, 3.3, clause 4:
1556 "[Note: a namespace name or a class template name must be unique
1557 in its declarative region (7.3.2, clause 14). ]" */
1558 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1559 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1560 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1561 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1562 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1563 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1565 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1566 && TREE_CODE (newdecl
) != TYPE_DECL
)
1567 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1568 && TREE_CODE (olddecl
) != TYPE_DECL
))
1570 /* We do nothing special here, because C++ does such nasty
1571 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1572 get shadowed, and know that if we need to find a TYPE_DECL
1573 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1574 slot of the identifier. */
1578 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1579 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1580 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1581 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1585 error ("%q#D redeclared as different kind of symbol", newdecl
);
1586 if (TREE_CODE (olddecl
) == TREE_LIST
)
1587 olddecl
= TREE_VALUE (olddecl
);
1588 inform (DECL_SOURCE_LOCATION (olddecl
),
1589 "previous declaration %q#D", olddecl
);
1591 return error_mark_node
;
1593 else if (!types_match
)
1595 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1596 /* These are certainly not duplicate declarations; they're
1597 from different scopes. */
1600 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1602 /* The name of a class template may not be declared to refer to
1603 any other template, class, function, object, namespace, value,
1604 or type in the same scope. */
1605 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1606 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1608 error ("conflicting declaration of template %q+#D", newdecl
);
1609 inform (DECL_SOURCE_LOCATION (olddecl
),
1610 "previous declaration %q#D", olddecl
);
1611 return error_mark_node
;
1613 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1614 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1615 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1616 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1617 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1618 DECL_TEMPLATE_PARMS (olddecl
))
1619 /* Template functions can be disambiguated by
1621 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1622 TREE_TYPE (TREE_TYPE (olddecl
)))
1623 // Template functions can also be disambiguated by
1625 && equivalently_constrained (olddecl
, newdecl
))
1627 error ("ambiguating new declaration %q+#D", newdecl
);
1628 inform (DECL_SOURCE_LOCATION (olddecl
),
1629 "old declaration %q#D", olddecl
);
1631 else if (check_concept_refinement (olddecl
, newdecl
))
1632 return error_mark_node
;
1635 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1637 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1639 error ("conflicting declaration of C function %q+#D",
1641 inform (DECL_SOURCE_LOCATION (olddecl
),
1642 "previous declaration %q#D", olddecl
);
1645 /* For function versions, params and types match, but they
1646 are not ambiguous. */
1647 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1648 && !DECL_FUNCTION_VERSIONED (olddecl
))
1649 // The functions have the same parameter types.
1650 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1651 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)))
1652 // And the same constraints.
1653 && equivalently_constrained (newdecl
, olddecl
))
1655 error ("ambiguating new declaration of %q+#D", newdecl
);
1656 inform (DECL_SOURCE_LOCATION (olddecl
),
1657 "old declaration %q#D", olddecl
);
1658 return error_mark_node
;
1665 error ("conflicting declaration %q+#D", newdecl
);
1666 inform (DECL_SOURCE_LOCATION (olddecl
),
1667 "previous declaration as %q#D", olddecl
);
1668 return error_mark_node
;
1671 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1672 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1673 && (!DECL_TEMPLATE_INFO (newdecl
)
1674 || (DECL_TI_TEMPLATE (newdecl
)
1675 != DECL_TI_TEMPLATE (olddecl
))))
1676 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1677 && (!DECL_TEMPLATE_INFO (olddecl
)
1678 || (DECL_TI_TEMPLATE (olddecl
)
1679 != DECL_TI_TEMPLATE (newdecl
))))))
1680 /* It's OK to have a template specialization and a non-template
1681 with the same type, or to have specializations of two
1682 different templates with the same type. Note that if one is a
1683 specialization, and the other is an instantiation of the same
1684 template, that we do not exit at this point. That situation
1685 can occur if we instantiate a template class, and then
1686 specialize one of its methods. This situation is valid, but
1687 the declarations must be merged in the usual way. */
1689 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1690 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1691 && !DECL_USE_TEMPLATE (newdecl
))
1692 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1693 && !DECL_USE_TEMPLATE (olddecl
))))
1694 /* One of the declarations is a template instantiation, and the
1695 other is not a template at all. That's OK. */
1697 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1699 /* In [namespace.alias] we have:
1701 In a declarative region, a namespace-alias-definition can be
1702 used to redefine a namespace-alias declared in that declarative
1703 region to refer only to the namespace to which it already
1706 Therefore, if we encounter a second alias directive for the same
1707 alias, we can just ignore the second directive. */
1708 if (DECL_NAMESPACE_ALIAS (newdecl
)
1709 && (DECL_NAMESPACE_ALIAS (newdecl
)
1710 == DECL_NAMESPACE_ALIAS (olddecl
)))
1712 /* [namespace.alias]
1714 A namespace-name or namespace-alias shall not be declared as
1715 the name of any other entity in the same declarative region.
1716 A namespace-name defined at global scope shall not be
1717 declared as the name of any other entity in any global scope
1719 error ("conflicting declaration of namespace %q+D", newdecl
);
1720 inform (DECL_SOURCE_LOCATION (olddecl
),
1721 "previous declaration of namespace %qD here", olddecl
);
1722 return error_mark_node
;
1726 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1729 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1730 if (DECL_NAME (olddecl
) != NULL_TREE
)
1731 inform (DECL_SOURCE_LOCATION (olddecl
),
1732 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1733 ? G_("%q#D previously defined here")
1734 : G_("%q#D previously declared here"), olddecl
);
1735 return error_mark_node
;
1737 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1738 && DECL_INITIAL (olddecl
) != NULL_TREE
1739 && !prototype_p (TREE_TYPE (olddecl
))
1740 && prototype_p (TREE_TYPE (newdecl
)))
1742 /* Prototype decl follows defn w/o prototype. */
1743 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1744 "prototype specified for %q#D", newdecl
))
1745 inform (DECL_SOURCE_LOCATION (olddecl
),
1746 "previous non-prototype definition here");
1748 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1749 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1752 If two declarations of the same function or object
1753 specify different linkage-specifications ..., the program
1754 is ill-formed.... Except for functions with C++ linkage,
1755 a function declaration without a linkage specification
1756 shall not precede the first linkage specification for
1757 that function. A function can be declared without a
1758 linkage specification after an explicit linkage
1759 specification has been seen; the linkage explicitly
1760 specified in the earlier declaration is not affected by
1761 such a function declaration.
1763 DR 563 raises the question why the restrictions on
1764 functions should not also apply to objects. Older
1765 versions of G++ silently ignore the linkage-specification
1773 which is clearly wrong. Therefore, we now treat objects
1775 if (current_lang_depth () == 0)
1777 /* There is no explicit linkage-specification, so we use
1778 the linkage from the previous declaration. */
1779 if (!DECL_LANG_SPECIFIC (newdecl
))
1780 retrofit_lang_decl (newdecl
);
1781 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1785 error ("conflicting declaration of %q+#D with %qL linkage",
1786 newdecl
, DECL_LANGUAGE (newdecl
));
1787 inform (DECL_SOURCE_LOCATION (olddecl
),
1788 "previous declaration with %qL linkage",
1789 DECL_LANGUAGE (olddecl
));
1793 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1795 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1797 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1798 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1799 && (/* grokfndecl passes member function templates too
1800 as FUNCTION_DECLs. */
1801 DECL_TEMPLATE_INFO (olddecl
)
1803 Default arguments for a member function of a class
1804 template shall be specified on the initial declaration
1805 of the member function within the class template. */
1806 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1807 check_redeclaration_no_default_args (newdecl
);
1810 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1811 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1814 for (; t1
&& t1
!= void_list_node
;
1815 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1816 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1818 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1821 if (permerror (input_location
,
1822 "default argument given for parameter "
1823 "%d of %q#D", i
, newdecl
))
1824 inform (DECL_SOURCE_LOCATION (olddecl
),
1825 "previous specification in %q#D here",
1830 error ("default argument given for parameter %d "
1831 "of %q#D", i
, newdecl
);
1832 inform (DECL_SOURCE_LOCATION (olddecl
),
1833 "previous specification in %q#D here",
1841 /* Do not merge an implicit typedef with an explicit one. In:
1845 typedef class A A __attribute__ ((foo));
1847 the attribute should apply only to the typedef. */
1848 if (TREE_CODE (olddecl
) == TYPE_DECL
1849 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1850 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1853 /* If new decl is `static' and an `extern' was seen previously,
1855 warn_extern_redeclared_static (newdecl
, olddecl
);
1857 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1858 return error_mark_node
;
1860 /* We have committed to returning 1 at this point. */
1861 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1863 /* Now that functions must hold information normally held
1864 by field decls, there is extra work to do so that
1865 declaration information does not get destroyed during
1867 if (DECL_VINDEX (olddecl
))
1868 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1869 if (DECL_CONTEXT (olddecl
))
1870 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1871 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1872 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1873 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1874 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1875 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1876 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1877 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1878 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1879 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1880 SET_OVERLOADED_OPERATOR_CODE
1881 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1882 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1884 /* Optionally warn about more than one declaration for the same
1885 name, but don't warn about a function declaration followed by a
1887 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1888 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1889 /* Don't warn about extern decl followed by definition. */
1890 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1891 /* Don't warn about friends, let add_friend take care of it. */
1892 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1893 /* Don't warn about declaration followed by specialization. */
1894 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1895 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1897 if (warning_at (DECL_SOURCE_LOCATION (newdecl
),
1898 OPT_Wredundant_decls
,
1899 "redundant redeclaration of %qD in same scope",
1901 inform (DECL_SOURCE_LOCATION (olddecl
),
1902 "previous declaration of %qD", olddecl
);
1905 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1906 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1908 if (DECL_DELETED_FN (newdecl
))
1910 error ("deleted definition of %q+D", newdecl
);
1911 inform (DECL_SOURCE_LOCATION (olddecl
),
1912 "previous declaration of %qD", olddecl
);
1914 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1918 /* Deal with C++: must preserve virtual function table size. */
1919 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1921 tree newtype
= TREE_TYPE (newdecl
);
1922 tree oldtype
= TREE_TYPE (olddecl
);
1924 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1925 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1926 CLASSTYPE_FRIEND_CLASSES (newtype
)
1927 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1929 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1932 /* Copy all the DECL_... slots specified in the new decl
1933 except for any that we copy here from the old type. */
1934 DECL_ATTRIBUTES (newdecl
)
1935 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1937 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1939 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1940 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1941 && DECL_HIDDEN_FRIEND_P (olddecl
)
1942 && newdecl_is_friend
);
1945 DECL_ANTICIPATED (olddecl
) = 0;
1946 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1950 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1954 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1955 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1956 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1957 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1958 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1959 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1961 DECL_ATTRIBUTES (old_result
)
1962 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1964 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1966 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1967 declarations of a function template. */
1968 if (DECL_SOURCE_LOCATION (newdecl
)
1969 != DECL_SOURCE_LOCATION (olddecl
))
1970 check_redeclaration_no_default_args (newdecl
);
1972 check_default_args (newdecl
);
1974 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1975 && DECL_INITIAL (new_result
))
1977 if (DECL_INITIAL (old_result
))
1978 DECL_UNINLINABLE (old_result
) = 1;
1980 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1981 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1982 DECL_NOT_REALLY_EXTERN (old_result
)
1983 = DECL_NOT_REALLY_EXTERN (new_result
);
1984 DECL_INTERFACE_KNOWN (old_result
)
1985 = DECL_INTERFACE_KNOWN (new_result
);
1986 DECL_DECLARED_INLINE_P (old_result
)
1987 = DECL_DECLARED_INLINE_P (new_result
);
1988 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1989 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1994 DECL_DECLARED_INLINE_P (old_result
)
1995 |= DECL_DECLARED_INLINE_P (new_result
);
1996 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1997 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1998 check_redeclaration_exception_specification (newdecl
, olddecl
);
2002 /* If the new declaration is a definition, update the file and
2003 line information on the declaration, and also make
2004 the old declaration the same definition. */
2005 if (DECL_INITIAL (new_result
) != NULL_TREE
)
2007 DECL_SOURCE_LOCATION (olddecl
)
2008 = DECL_SOURCE_LOCATION (old_result
)
2009 = DECL_SOURCE_LOCATION (newdecl
);
2010 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
2011 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
2014 DECL_ARGUMENTS (old_result
)
2015 = DECL_ARGUMENTS (new_result
);
2016 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
2017 parm
= DECL_CHAIN (parm
))
2018 DECL_CONTEXT (parm
) = old_result
;
2027 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2028 check_redeclaration_exception_specification (newdecl
, olddecl
);
2030 /* Automatically handles default parameters. */
2031 tree oldtype
= TREE_TYPE (olddecl
);
2034 /* For typedefs use the old type, as the new type's DECL_NAME points
2035 at newdecl, which will be ggc_freed. */
2036 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2038 /* But NEWTYPE might have an attribute, honor that. */
2039 tree tem
= TREE_TYPE (newdecl
);
2042 if (TYPE_USER_ALIGN (tem
))
2044 if (TYPE_ALIGN (tem
) > TYPE_ALIGN (newtype
))
2045 SET_TYPE_ALIGN (newtype
, TYPE_ALIGN (tem
));
2046 TYPE_USER_ALIGN (newtype
) = true;
2049 /* And remove the new type from the variants list. */
2050 if (TYPE_NAME (TREE_TYPE (newdecl
)) == newdecl
)
2052 tree remove
= TREE_TYPE (newdecl
);
2053 for (tree t
= TYPE_MAIN_VARIANT (remove
); ;
2054 t
= TYPE_NEXT_VARIANT (t
))
2055 if (TYPE_NEXT_VARIANT (t
) == remove
)
2057 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (remove
);
2063 /* Merge the data types specified in the two decls. */
2064 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
2066 if (VAR_P (newdecl
))
2068 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
2069 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
2070 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
2071 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
2072 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
2073 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
2075 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2076 if (DECL_LANG_SPECIFIC (olddecl
)
2077 && CP_DECL_THREADPRIVATE_P (olddecl
))
2079 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2080 if (!DECL_LANG_SPECIFIC (newdecl
))
2081 retrofit_lang_decl (newdecl
);
2083 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2087 /* An explicit specialization of a function template or of a member
2088 function of a class template can be declared transaction_safe
2089 independently of whether the corresponding template entity is declared
2090 transaction_safe. */
2091 if (flag_tm
&& TREE_CODE (newdecl
) == FUNCTION_DECL
2092 && DECL_TEMPLATE_INSTANTIATION (olddecl
)
2093 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)
2094 && tx_safe_fn_type_p (newtype
)
2095 && !tx_safe_fn_type_p (TREE_TYPE (newdecl
)))
2096 newtype
= tx_unsafe_fn_variant (newtype
);
2098 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2100 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2101 check_default_args (newdecl
);
2103 /* Lay the type out, unless already done. */
2104 if (! same_type_p (newtype
, oldtype
)
2105 && TREE_TYPE (newdecl
) != error_mark_node
2106 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2107 layout_type (TREE_TYPE (newdecl
));
2109 if ((VAR_P (newdecl
)
2110 || TREE_CODE (newdecl
) == PARM_DECL
2111 || TREE_CODE (newdecl
) == RESULT_DECL
2112 || TREE_CODE (newdecl
) == FIELD_DECL
2113 || TREE_CODE (newdecl
) == TYPE_DECL
)
2114 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2115 layout_decl (newdecl
, 0);
2117 /* Merge the type qualifiers. */
2118 if (TREE_READONLY (newdecl
))
2119 TREE_READONLY (olddecl
) = 1;
2120 if (TREE_THIS_VOLATILE (newdecl
))
2121 TREE_THIS_VOLATILE (olddecl
) = 1;
2122 if (TREE_NOTHROW (newdecl
))
2123 TREE_NOTHROW (olddecl
) = 1;
2125 /* Merge deprecatedness. */
2126 if (TREE_DEPRECATED (newdecl
))
2127 TREE_DEPRECATED (olddecl
) = 1;
2129 /* Preserve function specific target and optimization options */
2130 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2132 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2133 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2134 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2135 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2137 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2138 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2139 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2140 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2143 /* Merge the initialization information. */
2144 if (DECL_INITIAL (newdecl
) == NULL_TREE
2145 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2147 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2148 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2149 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2151 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2152 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2156 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2158 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2159 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2160 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2161 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2162 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2163 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2164 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2165 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2166 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2167 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2168 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2169 /* Keep the old RTL. */
2170 COPY_DECL_RTL (olddecl
, newdecl
);
2172 else if (VAR_P (newdecl
)
2173 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2175 /* Keep the old RTL. We cannot keep the old RTL if the old
2176 declaration was for an incomplete object and the new
2177 declaration is not since many attributes of the RTL will
2179 COPY_DECL_RTL (olddecl
, newdecl
);
2182 /* If cannot merge, then use the new type and qualifiers,
2183 and don't preserve the old rtl. */
2186 /* Clean out any memory we had of the old declaration. */
2187 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2189 TREE_VALUE (oldstatic
) = error_mark_node
;
2191 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2192 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2193 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2194 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2197 /* Merge the storage class information. */
2198 merge_weak (newdecl
, olddecl
);
2200 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2201 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2202 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2203 if (! DECL_EXTERNAL (olddecl
))
2204 DECL_EXTERNAL (newdecl
) = 0;
2205 if (! DECL_COMDAT (olddecl
))
2206 DECL_COMDAT (newdecl
) = 0;
2208 new_template_info
= NULL_TREE
;
2209 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2211 bool new_redefines_gnu_inline
= false;
2213 if (new_defines_function
2214 && ((DECL_INTERFACE_KNOWN (olddecl
)
2215 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2216 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2217 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2218 == FUNCTION_DECL
))))
2222 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2223 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2225 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2228 if (!new_redefines_gnu_inline
)
2230 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2231 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2232 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2234 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2235 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2236 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2238 /* If the OLDDECL is an instantiation and/or specialization,
2239 then the NEWDECL must be too. But, it may not yet be marked
2240 as such if the caller has created NEWDECL, but has not yet
2241 figured out that it is a redeclaration. */
2242 if (!DECL_USE_TEMPLATE (newdecl
))
2243 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2245 /* Don't really know how much of the language-specific
2246 values we should copy from old to new. */
2247 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2248 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2249 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2250 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2252 if (LANG_DECL_HAS_MIN (newdecl
))
2254 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2255 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2256 if (DECL_TEMPLATE_INFO (newdecl
))
2258 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2259 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2260 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2261 /* Remember the presence of explicit specialization args. */
2262 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2263 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2265 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2267 /* Only functions have these fields. */
2268 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2270 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2271 DECL_BEFRIENDING_CLASSES (newdecl
)
2272 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2273 DECL_BEFRIENDING_CLASSES (olddecl
));
2274 /* DECL_THUNKS is only valid for virtual functions,
2275 otherwise it is a DECL_FRIEND_CONTEXT. */
2276 if (DECL_VIRTUAL_P (newdecl
))
2277 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2279 /* Only variables have this field. */
2280 else if (VAR_P (newdecl
)
2281 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2282 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2285 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2289 /* Merge parameter attributes. */
2290 tree oldarg
, newarg
;
2291 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2292 newarg
= DECL_ARGUMENTS(newdecl
);
2294 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2295 DECL_ATTRIBUTES (newarg
)
2296 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2297 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2300 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2301 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2303 /* If newdecl is not a specialization, then it is not a
2304 template-related function at all. And that means that we
2305 should have exited above, returning 0. */
2306 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2308 if (DECL_ODR_USED (olddecl
))
2309 /* From [temp.expl.spec]:
2311 If a template, a member template or the member of a class
2312 template is explicitly specialized then that
2313 specialization shall be declared before the first use of
2314 that specialization that would cause an implicit
2315 instantiation to take place, in every translation unit in
2316 which such a use occurs. */
2317 error ("explicit specialization of %qD after first use",
2320 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2321 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2322 && DECL_DECLARED_INLINE_P (newdecl
));
2324 /* Don't propagate visibility from the template to the
2325 specialization here. We'll do that in determine_visibility if
2327 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2329 /* [temp.expl.spec/14] We don't inline explicit specialization
2330 just because the primary template says so. */
2332 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2333 the always_inline attribute. */
2334 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2335 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2337 if (DECL_DECLARED_INLINE_P (newdecl
))
2338 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2340 DECL_ATTRIBUTES (newdecl
)
2341 = remove_attribute ("always_inline",
2342 DECL_ATTRIBUTES (newdecl
));
2345 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2347 /* Never inline re-defined extern inline functions.
2348 FIXME: this could be better handled by keeping both
2349 function as separate declarations. */
2350 DECL_UNINLINABLE (newdecl
) = 1;
2354 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2355 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2357 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2359 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2360 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2362 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2363 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2364 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2365 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2368 /* Preserve abstractness on cloned [cd]tors. */
2369 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2371 /* Update newdecl's parms to point at olddecl. */
2372 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2373 parm
= DECL_CHAIN (parm
))
2374 DECL_CONTEXT (parm
) = olddecl
;
2378 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2379 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2380 COPY_DECL_RTL (newdecl
, olddecl
);
2382 if (! types_match
|| new_defines_function
)
2384 /* These need to be copied so that the names are available.
2385 Note that if the types do match, we'll preserve inline
2386 info and other bits, but if not, we won't. */
2387 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2388 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2390 /* If redeclaring a builtin function, it stays built in
2391 if newdecl is a gnu_inline definition, or if newdecl is just
2393 if (DECL_BUILT_IN (olddecl
)
2394 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2396 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2397 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2398 /* If we're keeping the built-in definition, keep the rtl,
2399 regardless of declaration matches. */
2400 COPY_DECL_RTL (olddecl
, newdecl
);
2401 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2403 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2406 /* If a compatible prototype of these builtin functions
2407 is seen, assume the runtime implements it with the
2408 expected semantics. */
2409 case BUILT_IN_STPCPY
:
2410 if (builtin_decl_explicit_p (fncode
))
2411 set_builtin_decl_implicit_p (fncode
, true);
2414 if (builtin_decl_explicit_p (fncode
))
2415 set_builtin_decl_declared_p (fncode
, true);
2420 if (new_defines_function
)
2421 /* If defining a function declared with other language
2422 linkage, use the previously declared language linkage. */
2423 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2424 else if (types_match
)
2426 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2427 /* Don't clear out the arguments if we're just redeclaring a
2429 if (DECL_ARGUMENTS (olddecl
))
2430 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2433 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2434 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2436 /* Now preserve various other info from the definition. */
2437 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2438 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2439 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2440 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2442 /* Warn about conflicting visibility specifications. */
2443 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2444 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2445 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2447 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2448 "%qD: visibility attribute ignored because it "
2449 "conflicts with previous declaration", newdecl
))
2450 inform (DECL_SOURCE_LOCATION (olddecl
),
2451 "previous declaration of %qD", olddecl
);
2453 /* Choose the declaration which specified visibility. */
2454 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2456 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2457 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2459 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2460 so keep this behavior. */
2461 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2463 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2464 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2466 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2467 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2469 SET_DECL_ALIGN (newdecl
, DECL_ALIGN (olddecl
));
2470 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2472 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2473 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2474 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2476 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2477 with that from NEWDECL below. */
2478 if (DECL_LANG_SPECIFIC (olddecl
))
2480 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2481 != DECL_LANG_SPECIFIC (newdecl
));
2482 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2485 /* Merge the USED information. */
2486 if (TREE_USED (olddecl
))
2487 TREE_USED (newdecl
) = 1;
2488 else if (TREE_USED (newdecl
))
2489 TREE_USED (olddecl
) = 1;
2490 if (VAR_P (newdecl
))
2492 if (DECL_READ_P (olddecl
))
2493 DECL_READ_P (newdecl
) = 1;
2494 else if (DECL_READ_P (newdecl
))
2495 DECL_READ_P (olddecl
) = 1;
2497 if (DECL_PRESERVE_P (olddecl
))
2498 DECL_PRESERVE_P (newdecl
) = 1;
2499 else if (DECL_PRESERVE_P (newdecl
))
2500 DECL_PRESERVE_P (olddecl
) = 1;
2502 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2503 to olddecl and deleted. */
2504 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2505 && DECL_FUNCTION_VERSIONED (olddecl
))
2507 /* Set the flag for newdecl so that it gets copied to olddecl. */
2508 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2509 /* newdecl will be purged after copying to olddecl and is no longer
2511 cgraph_node::delete_function_version (newdecl
);
2514 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2517 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2519 function_size
= sizeof (struct tree_decl_common
);
2521 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2522 (char *) newdecl
+ sizeof (struct tree_common
),
2523 function_size
- sizeof (struct tree_common
));
2525 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2526 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2527 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2529 /* Preserve symtab node mapping. */
2530 olddecl
->decl_with_vis
.symtab_node
= snode
;
2532 if (new_template_info
)
2533 /* If newdecl is a template instantiation, it is possible that
2534 the following sequence of events has occurred:
2536 o A friend function was declared in a class template. The
2537 class template was instantiated.
2539 o The instantiation of the friend declaration was
2540 recorded on the instantiation list, and is newdecl.
2542 o Later, however, instantiate_class_template called pushdecl
2543 on the newdecl to perform name injection. But, pushdecl in
2544 turn called duplicate_decls when it discovered that another
2545 declaration of a global function with the same name already
2548 o Here, in duplicate_decls, we decided to clobber newdecl.
2550 If we're going to do that, we'd better make sure that
2551 olddecl, and not newdecl, is on the list of
2552 instantiations so that if we try to do the instantiation
2553 again we won't get the clobbered declaration. */
2554 reregister_specialization (newdecl
,
2560 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2562 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2563 (char *) newdecl
+ sizeof (struct tree_common
),
2564 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2565 switch (TREE_CODE (newdecl
))
2575 struct symtab_node
*snode
= NULL
;
2578 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
)
2579 || DECL_EXTERNAL (olddecl
)))
2580 snode
= symtab_node::get (olddecl
);
2581 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2582 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2583 size
- sizeof (struct tree_decl_common
)
2584 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2585 if (VAR_P (newdecl
))
2586 olddecl
->decl_with_vis
.symtab_node
= snode
;
2590 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2591 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2592 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2593 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2598 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2600 if (DECL_EXTERNAL (olddecl
)
2601 || TREE_PUBLIC (olddecl
)
2602 || TREE_STATIC (olddecl
))
2604 /* Merge the section attribute.
2605 We want to issue an error if the sections conflict but that must be
2606 done later in decl_attributes since we are called before attributes
2608 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2609 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2611 if (DECL_ONE_ONLY (newdecl
))
2613 struct symtab_node
*oldsym
, *newsym
;
2614 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2615 oldsym
= cgraph_node::get_create (olddecl
);
2617 oldsym
= varpool_node::get_create (olddecl
);
2618 newsym
= symtab_node::get (newdecl
);
2619 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2624 && CP_DECL_THREAD_LOCAL_P (newdecl
))
2626 CP_DECL_THREAD_LOCAL_P (olddecl
) = true;
2627 if (!processing_template_decl
)
2628 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2632 DECL_UID (olddecl
) = olddecl_uid
;
2634 DECL_FRIEND_P (olddecl
) = 1;
2637 DECL_ANTICIPATED (olddecl
) = 1;
2638 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2641 /* NEWDECL contains the merged attribute lists.
2642 Update OLDDECL to be the same. */
2643 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2645 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2646 so that encode_section_info has a chance to look at the new decl
2647 flags and attributes. */
2648 if (DECL_RTL_SET_P (olddecl
)
2649 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2651 && TREE_STATIC (olddecl
))))
2652 make_decl_rtl (olddecl
);
2654 /* The NEWDECL will no longer be needed. Because every out-of-class
2655 declaration of a member results in a call to duplicate_decls,
2656 freeing these nodes represents in a significant savings.
2658 Before releasing the node, be sore to remove function from symbol
2659 table that might have been inserted there to record comdat group.
2660 Be sure to however do not free DECL_STRUCT_FUNCTION because this
2661 structure is shared in between newdecl and oldecl. */
2662 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2663 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2664 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2666 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2671 /* Remove the associated constraints for newdecl, if any, before
2672 reclaiming memory. */
2674 remove_constraints (newdecl
);
2681 /* Return zero if the declaration NEWDECL is valid
2682 when the declaration OLDDECL (assumed to be for the same name)
2683 has already been seen.
2684 Otherwise return an error message format string with a %s
2685 where the identifier should go. */
2688 redeclaration_error_message (tree newdecl
, tree olddecl
)
2690 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2692 /* Because C++ can put things into name space for free,
2693 constructs like "typedef struct foo { ... } foo"
2694 would look like an erroneous redeclaration. */
2695 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2698 return G_("redefinition of %q#D");
2700 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2702 /* If this is a pure function, its olddecl will actually be
2703 the original initialization to `0' (which we force to call
2704 abort()). Don't complain about redefinition in this case. */
2705 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2706 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2709 /* If both functions come from different namespaces, this is not
2710 a redeclaration - this is a conflict with a used function. */
2711 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2712 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2713 && ! decls_match (olddecl
, newdecl
))
2714 return G_("%qD conflicts with used function");
2716 /* We'll complain about linkage mismatches in
2717 warn_extern_redeclared_static. */
2719 /* Defining the same name twice is no good. */
2720 if (DECL_INITIAL (olddecl
) != NULL_TREE
2721 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2723 if (DECL_NAME (olddecl
) == NULL_TREE
)
2724 return G_("%q#D not declared in class");
2725 else if (!GNU_INLINE_P (olddecl
)
2726 || GNU_INLINE_P (newdecl
))
2727 return G_("redefinition of %q#D");
2730 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2732 bool olda
= GNU_INLINE_P (olddecl
);
2733 bool newa
= GNU_INLINE_P (newdecl
);
2738 return G_("%q+D redeclared inline with "
2739 "%<gnu_inline%> attribute");
2741 return G_("%q+D redeclared inline without "
2742 "%<gnu_inline%> attribute");
2746 check_abi_tag_redeclaration
2747 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2748 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2752 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2756 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2758 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2759 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2760 return G_("redefinition of %q#D");
2764 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2765 || (DECL_TEMPLATE_RESULT (newdecl
)
2766 == DECL_TEMPLATE_RESULT (olddecl
)))
2769 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2770 if (DECL_TEMPLATE_INFO (nt
))
2771 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2772 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2773 if (DECL_TEMPLATE_INFO (ot
))
2774 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2775 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2776 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2777 return G_("redefinition of %q#D");
2779 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2781 bool olda
= GNU_INLINE_P (ot
);
2782 bool newa
= GNU_INLINE_P (nt
);
2787 return G_("%q+D redeclared inline with "
2788 "%<gnu_inline%> attribute");
2790 return G_("%q+D redeclared inline without "
2791 "%<gnu_inline%> attribute");
2795 /* Core issue #226 (C++0x):
2797 If a friend function template declaration specifies a
2798 default template-argument, that declaration shall be a
2799 definition and shall be the only declaration of the
2800 function template in the translation unit. */
2801 if ((cxx_dialect
!= cxx98
)
2802 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2803 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2804 /*is_primary=*/true,
2805 /*is_partial=*/false,
2806 /*is_friend_decl=*/2))
2807 return G_("redeclaration of friend %q#D "
2808 "may not have default template arguments");
2812 else if (VAR_P (newdecl
)
2813 && CP_DECL_THREAD_LOCAL_P (newdecl
) != CP_DECL_THREAD_LOCAL_P (olddecl
)
2814 && (! DECL_LANG_SPECIFIC (olddecl
)
2815 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2816 || CP_DECL_THREAD_LOCAL_P (newdecl
)))
2818 /* Only variables can be thread-local, and all declarations must
2819 agree on this property. */
2820 if (CP_DECL_THREAD_LOCAL_P (newdecl
))
2821 return G_("thread-local declaration of %q#D follows "
2822 "non-thread-local declaration");
2824 return G_("non-thread-local declaration of %q#D follows "
2825 "thread-local declaration");
2827 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2829 /* The objects have been declared at namespace scope. If either
2830 is a member of an anonymous union, then this is an invalid
2831 redeclaration. For example:
2837 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2838 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2839 return G_("redeclaration of %q#D");
2840 /* If at least one declaration is a reference, there is no
2841 conflict. For example:
2847 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2849 /* Reject two definitions. */
2850 return G_("redefinition of %q#D");
2854 /* Objects declared with block scope: */
2855 /* Reject two definitions, and reject a definition
2856 together with an external reference. */
2857 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2858 return G_("redeclaration of %q#D");
2863 /* Hash and equality functions for the named_label table. */
2866 named_label_hasher::hash (named_label_entry
*ent
)
2868 return DECL_UID (ent
->label_decl
);
2872 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2874 return a
->label_decl
== b
->label_decl
;
2877 /* Create a new label, named ID. */
2880 make_label_decl (tree id
, int local_p
)
2882 struct named_label_entry
*ent
;
2885 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2887 DECL_CONTEXT (decl
) = current_function_decl
;
2888 DECL_MODE (decl
) = VOIDmode
;
2889 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2891 /* Say where one reference is to the label, for the sake of the
2892 error if it is not defined. */
2893 DECL_SOURCE_LOCATION (decl
) = input_location
;
2895 /* Record the fact that this identifier is bound to this label. */
2896 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2898 /* Create the label htab for the function on demand. */
2900 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2902 /* Record this label on the list of labels used in this function.
2903 We do this before calling make_label_decl so that we get the
2904 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2905 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2906 ent
->label_decl
= decl
;
2908 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2909 gcc_assert (*slot
== NULL
);
2915 /* Look for a label named ID in the current function. If one cannot
2916 be found, create one. (We keep track of used, but undefined,
2917 labels, and complain about them at the end of a function.) */
2920 lookup_label_1 (tree id
)
2924 /* You can't use labels at global scope. */
2925 if (current_function_decl
== NULL_TREE
)
2927 error ("label %qE referenced outside of any function", id
);
2931 /* See if we've already got this label. */
2932 decl
= IDENTIFIER_LABEL_VALUE (id
);
2933 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2936 decl
= make_label_decl (id
, /*local_p=*/0);
2940 /* Wrapper for lookup_label_1. */
2943 lookup_label (tree id
)
2946 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2947 ret
= lookup_label_1 (id
);
2948 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2952 /* Declare a local label named ID. */
2955 declare_local_label (tree id
)
2958 cp_label_binding bind
;
2960 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2961 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2962 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2964 decl
= make_label_decl (id
, /*local_p=*/1);
2966 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2971 /* Returns nonzero if it is ill-formed to jump past the declaration of
2972 DECL. Returns 2 if it's also a real problem. */
2975 decl_jump_unsafe (tree decl
)
2977 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2978 with automatic storage duration is not in scope to a point where it is
2979 in scope is ill-formed unless the variable has scalar type, class type
2980 with a trivial default constructor and a trivial destructor, a
2981 cv-qualified version of one of these types, or an array of one of the
2982 preceding types and is declared without an initializer (8.5). */
2983 tree type
= TREE_TYPE (decl
);
2985 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2986 || type
== error_mark_node
)
2989 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2990 || variably_modified_type_p (type
, NULL_TREE
))
2993 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2999 /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3003 identify_goto (tree decl
, location_t loc
, const location_t
*locus
,
3004 diagnostic_t diag_kind
)
3007 = (decl
? emit_diagnostic (diag_kind
, loc
, 0, "jump to label %qD", decl
)
3008 : emit_diagnostic (diag_kind
, loc
, 0, "jump to case label"));
3009 if (complained
&& locus
)
3010 inform (*locus
, " from here");
3014 /* Check that a single previously seen jump to a newly defined label
3015 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3016 the jump context; NAMES are the names in scope in LEVEL at the jump
3017 context; LOCUS is the source position of the jump or 0. Returns
3018 true if all is well. */
3021 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
3022 bool exited_omp
, const location_t
*locus
)
3024 cp_binding_level
*b
;
3025 bool complained
= false;
3027 bool saw_eh
= false, saw_omp
= false, saw_tm
= false;
3031 complained
= identify_goto (decl
, input_location
, locus
, DK_ERROR
);
3033 inform (input_location
, " exits OpenMP structured block");
3038 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3040 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
3042 for (new_decls
= b
->names
; new_decls
!= old_decls
;
3043 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
3044 : TREE_CHAIN (new_decls
)))
3046 int problem
= decl_jump_unsafe (new_decls
);
3052 complained
= identify_goto (decl
, input_location
, locus
,
3059 inform (DECL_SOURCE_LOCATION (new_decls
),
3060 " crosses initialization of %q#D", new_decls
);
3062 inform (DECL_SOURCE_LOCATION (new_decls
),
3063 " enters scope of %q#D which has "
3064 "non-trivial destructor", new_decls
);
3070 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
3074 complained
= identify_goto (decl
, input_location
, locus
,
3080 if (b
->kind
== sk_try
)
3081 inform (input_location
, " enters try block");
3083 inform (input_location
, " enters catch block");
3087 if (b
->kind
== sk_omp
&& !saw_omp
)
3091 complained
= identify_goto (decl
, input_location
, locus
,
3096 inform (input_location
, " enters OpenMP structured block");
3099 if (b
->kind
== sk_transaction
&& !saw_tm
)
3103 complained
= identify_goto (decl
, input_location
, locus
,
3108 inform (input_location
,
3109 " enters synchronized or atomic statement");
3118 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
3120 check_previous_goto_1 (decl
, use
->binding_level
,
3121 use
->names_in_scope
, use
->in_omp_scope
,
3122 &use
->o_goto_locus
);
3126 check_switch_goto (cp_binding_level
* level
)
3128 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3131 /* Check that a new jump to a label DECL is OK. Called by
3132 finish_goto_stmt. */
3135 check_goto (tree decl
)
3137 struct named_label_entry
*ent
, dummy
;
3138 bool saw_catch
= false, complained
= false;
3143 /* We can't know where a computed goto is jumping.
3144 So we assume that it's OK. */
3145 if (TREE_CODE (decl
) != LABEL_DECL
)
3148 /* We didn't record any information about this label when we created it,
3149 and there's not much point since it's trivial to analyze as a return. */
3150 if (decl
== cdtor_label
)
3153 dummy
.label_decl
= decl
;
3154 ent
= named_labels
->find (&dummy
);
3155 gcc_assert (ent
!= NULL
);
3157 /* If the label hasn't been defined yet, defer checking. */
3158 if (! DECL_INITIAL (decl
))
3160 struct named_label_use_entry
*new_use
;
3162 /* Don't bother creating another use if the last goto had the
3163 same data, and will therefore create the same set of errors. */
3165 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3168 new_use
= ggc_alloc
<named_label_use_entry
> ();
3169 new_use
->binding_level
= current_binding_level
;
3170 new_use
->names_in_scope
= current_binding_level
->names
;
3171 new_use
->o_goto_locus
= input_location
;
3172 new_use
->in_omp_scope
= false;
3174 new_use
->next
= ent
->uses
;
3175 ent
->uses
= new_use
;
3179 if (ent
->in_try_scope
|| ent
->in_catch_scope
|| ent
->in_transaction_scope
3180 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3182 diagnostic_t diag_kind
= DK_PERMERROR
;
3183 if (ent
->in_try_scope
|| ent
->in_catch_scope
3184 || ent
->in_transaction_scope
|| ent
->in_omp_scope
)
3185 diag_kind
= DK_ERROR
;
3186 complained
= identify_goto (decl
, DECL_SOURCE_LOCATION (decl
),
3187 &input_location
, diag_kind
);
3188 identified
= 1 + (diag_kind
== DK_ERROR
);
3191 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3193 int u
= decl_jump_unsafe (bad
);
3195 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3197 /* Can't skip init of __exception_info. */
3198 if (identified
== 1)
3200 complained
= identify_goto (decl
, DECL_SOURCE_LOCATION (decl
),
3201 &input_location
, DK_ERROR
);
3205 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3208 else if (complained
)
3211 inform (DECL_SOURCE_LOCATION (bad
),
3212 " skips initialization of %q#D", bad
);
3214 inform (DECL_SOURCE_LOCATION (bad
),
3215 " enters scope of %q#D which has "
3216 "non-trivial destructor", bad
);
3222 if (ent
->in_try_scope
)
3223 inform (input_location
, " enters try block");
3224 else if (ent
->in_catch_scope
&& !saw_catch
)
3225 inform (input_location
, " enters catch block");
3226 else if (ent
->in_transaction_scope
)
3227 inform (input_location
, " enters synchronized or atomic statement");
3230 if (ent
->in_omp_scope
)
3233 inform (input_location
, " enters OpenMP structured block");
3235 else if (flag_openmp
)
3237 cp_binding_level
*b
;
3238 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3240 if (b
== ent
->binding_level
)
3242 if (b
->kind
== sk_omp
)
3246 complained
= identify_goto (decl
,
3247 DECL_SOURCE_LOCATION (decl
),
3248 &input_location
, DK_ERROR
);
3252 inform (input_location
, " exits OpenMP structured block");
3259 /* Check that a return is ok wrt OpenMP structured blocks.
3260 Called by finish_return_stmt. Returns true if all is well. */
3263 check_omp_return (void)
3265 cp_binding_level
*b
;
3266 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3267 if (b
->kind
== sk_omp
)
3269 error ("invalid exit from OpenMP structured block");
3272 else if (b
->kind
== sk_function_parms
)
3277 /* Define a label, specifying the location in the source file.
3278 Return the LABEL_DECL node for the label. */
3281 define_label_1 (location_t location
, tree name
)
3283 struct named_label_entry
*ent
, dummy
;
3284 cp_binding_level
*p
;
3287 decl
= lookup_label (name
);
3289 dummy
.label_decl
= decl
;
3290 ent
= named_labels
->find (&dummy
);
3291 gcc_assert (ent
!= NULL
);
3293 /* After labels, make any new cleanups in the function go into their
3294 own new (temporary) binding contour. */
3295 for (p
= current_binding_level
;
3296 p
->kind
!= sk_function_parms
;
3298 p
->more_cleanups_ok
= 0;
3300 if (name
== get_identifier ("wchar_t"))
3301 permerror (input_location
, "label named wchar_t");
3303 if (DECL_INITIAL (decl
) != NULL_TREE
)
3305 error ("duplicate label %qD", decl
);
3306 return error_mark_node
;
3310 struct named_label_use_entry
*use
;
3312 /* Mark label as having been defined. */
3313 DECL_INITIAL (decl
) = error_mark_node
;
3314 /* Say where in the source. */
3315 DECL_SOURCE_LOCATION (decl
) = location
;
3317 ent
->binding_level
= current_binding_level
;
3318 ent
->names_in_scope
= current_binding_level
->names
;
3320 for (use
= ent
->uses
; use
; use
= use
->next
)
3321 check_previous_goto (decl
, use
);
3328 /* Wrapper for define_label_1. */
3331 define_label (location_t location
, tree name
)
3334 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3335 ret
= define_label_1 (location
, name
);
3336 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3343 cp_binding_level
*level
;
3344 struct cp_switch
*next
;
3345 /* The SWITCH_STMT being built. */
3347 /* A splay-tree mapping the low element of a case range to the high
3348 element, or NULL_TREE if there is no high element. Used to
3349 determine whether or not a new case label duplicates an old case
3350 label. We need a tree, rather than simply a hash table, because
3351 of the GNU case range extension. */
3353 /* Remember whether there was a case value that is outside the
3354 range of the original type of the controlling expression. */
3355 bool outside_range_p
;
3358 /* A stack of the currently active switch statements. The innermost
3359 switch statement is on the top of the stack. There is no need to
3360 mark the stack for garbage collection because it is only active
3361 during the processing of the body of a function, and we never
3362 collect at that point. */
3364 static struct cp_switch
*switch_stack
;
3366 /* Called right after a switch-statement condition is parsed.
3367 SWITCH_STMT is the switch statement being parsed. */
3370 push_switch (tree switch_stmt
)
3372 struct cp_switch
*p
= XNEW (struct cp_switch
);
3373 p
->level
= current_binding_level
;
3374 p
->next
= switch_stack
;
3375 p
->switch_stmt
= switch_stmt
;
3376 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3377 p
->outside_range_p
= false;
3384 struct cp_switch
*cs
= switch_stack
;
3385 location_t switch_location
;
3387 /* Emit warnings as needed. */
3388 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3389 const bool bool_cond_p
3390 = (SWITCH_STMT_TYPE (cs
->switch_stmt
)
3391 && TREE_CODE (SWITCH_STMT_TYPE (cs
->switch_stmt
)) == BOOLEAN_TYPE
);
3392 if (!processing_template_decl
)
3393 c_do_switch_warnings (cs
->cases
, switch_location
,
3394 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3395 SWITCH_STMT_COND (cs
->switch_stmt
),
3396 bool_cond_p
, cs
->outside_range_p
);
3398 splay_tree_delete (cs
->cases
);
3399 switch_stack
= switch_stack
->next
;
3403 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3404 condition. Note that if TYPE and VALUE are already integral we don't
3405 really do the conversion because the language-independent
3406 warning/optimization code will work better that way. */
3409 case_conversion (tree type
, tree value
)
3411 if (value
== NULL_TREE
)
3414 if (cxx_dialect
>= cxx11
3415 && (SCOPED_ENUM_P (type
)
3416 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3418 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3419 type
= type_promotes_to (type
);
3420 value
= (perform_implicit_conversion_flags
3421 (type
, value
, tf_warning_or_error
,
3422 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3424 return cxx_constant_value (value
);
3427 /* Note that we've seen a definition of a case label, and complain if this
3428 is a bad place for one. */
3431 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3434 cp_binding_level
*p
;
3437 if (processing_template_decl
)
3441 /* For templates, just add the case label; we'll do semantic
3442 analysis at instantiation-time. */
3443 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3444 return add_stmt (build_case_label (low_value
, high_value
, label
));
3447 /* Find the condition on which this switch statement depends. */
3448 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3449 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3450 cond
= TREE_VALUE (cond
);
3452 if (!check_switch_goto (switch_stack
->level
))
3453 return error_mark_node
;
3455 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3457 low_value
= case_conversion (type
, low_value
);
3458 high_value
= case_conversion (type
, high_value
);
3460 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3461 low_value
, high_value
,
3462 &switch_stack
->outside_range_p
);
3464 /* After labels, make any new cleanups in the function go into their
3465 own new (temporary) binding contour. */
3466 for (p
= current_binding_level
;
3467 p
->kind
!= sk_function_parms
;
3469 p
->more_cleanups_ok
= 0;
3474 struct typename_info
{
3482 struct typename_hasher
: ggc_ptr_hash
<tree_node
>
3484 typedef typename_info
*compare_type
;
3486 /* Hash a TYPENAME_TYPE. */
3493 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3494 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3499 /* Compare two TYPENAME_TYPEs. */
3502 equal (tree t1
, const typename_info
*t2
)
3504 return (TYPE_IDENTIFIER (t1
) == t2
->name
3505 && TYPE_CONTEXT (t1
) == t2
->scope
3506 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3507 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3508 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3512 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3513 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3515 Returns the new TYPENAME_TYPE. */
3517 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3520 build_typename_type (tree context
, tree name
, tree fullname
,
3521 enum tag_types tag_type
)
3529 if (typename_htab
== NULL
)
3530 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3532 ti
.scope
= FROB_CONTEXT (context
);
3534 ti
.template_id
= fullname
;
3535 ti
.enum_p
= tag_type
== enum_type
;
3536 ti
.class_p
= (tag_type
== class_type
3537 || tag_type
== record_type
3538 || tag_type
== union_type
);
3539 hash
= (htab_hash_pointer (ti
.scope
)
3540 ^ htab_hash_pointer (ti
.name
));
3542 /* See if we already have this type. */
3543 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3548 /* Build the TYPENAME_TYPE. */
3549 t
= cxx_make_type (TYPENAME_TYPE
);
3550 TYPE_CONTEXT (t
) = ti
.scope
;
3551 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3552 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3553 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3555 /* Build the corresponding TYPE_DECL. */
3556 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3557 TYPE_NAME (TREE_TYPE (d
)) = d
;
3558 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3559 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3560 DECL_ARTIFICIAL (d
) = 1;
3562 /* Store it in the hash table. */
3565 /* TYPENAME_TYPEs must always be compared structurally, because
3566 they may or may not resolve down to another type depending on
3567 the currently open classes. */
3568 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3574 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3575 provided to name the type. Returns an appropriate type, unless an
3576 error occurs, in which case error_mark_node is returned. If we
3577 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3578 return that, rather than the _TYPE it corresponds to, in other
3579 cases we look through the type decl. If TF_ERROR is set, complain
3580 about errors, otherwise be quiet. */
3583 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3584 tsubst_flags_t complain
)
3590 if (name
== error_mark_node
3591 || context
== NULL_TREE
3592 || context
== error_mark_node
)
3593 return error_mark_node
;
3597 if (!(TYPE_LANG_SPECIFIC (name
)
3598 && (CLASSTYPE_IS_TEMPLATE (name
)
3599 || CLASSTYPE_USE_TEMPLATE (name
))))
3600 name
= TYPE_IDENTIFIER (name
);
3602 /* Create a TEMPLATE_ID_EXPR for the type. */
3603 name
= build_nt (TEMPLATE_ID_EXPR
,
3604 CLASSTYPE_TI_TEMPLATE (name
),
3605 CLASSTYPE_TI_ARGS (name
));
3607 else if (TREE_CODE (name
) == TYPE_DECL
)
3608 name
= DECL_NAME (name
);
3612 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3614 name
= TREE_OPERAND (name
, 0);
3615 if (DECL_TYPE_TEMPLATE_P (name
))
3616 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3617 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3619 if (complain
& tf_error
)
3620 error ("%qD is not a type", name
);
3621 return error_mark_node
;
3624 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3626 if (complain
& tf_error
)
3627 error ("%qD used without template parameters", name
);
3628 return error_mark_node
;
3630 gcc_assert (identifier_p (name
));
3631 gcc_assert (TYPE_P (context
));
3633 if (!MAYBE_CLASS_TYPE_P (context
))
3635 if (complain
& tf_error
)
3636 error ("%q#T is not a class", context
);
3637 return error_mark_node
;
3640 /* When the CONTEXT is a dependent type, NAME could refer to a
3641 dependent base class of CONTEXT. But look inside it anyway
3642 if CONTEXT is a currently open scope, in case it refers to a
3643 member of the current instantiation or a non-dependent base;
3644 lookup will stop when we hit a dependent base. */
3645 if (!dependent_scope_p (context
))
3646 /* We should only set WANT_TYPE when we're a nested typename type.
3647 Then we can give better diagnostics if we find a non-type. */
3648 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3652 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3653 return build_typename_type (context
, name
, fullname
, tag_type
);
3655 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3659 if (complain
& tf_error
)
3660 error (want_template
? G_("no class template named %q#T in %q#T")
3661 : G_("no type named %q#T in %q#T"), name
, context
);
3662 return error_mark_node
;
3665 /* Pull out the template from an injected-class-name (or multiple). */
3667 t
= maybe_get_template_decl_from_type_decl (t
);
3669 if (TREE_CODE (t
) == TREE_LIST
)
3671 if (complain
& tf_error
)
3673 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3674 print_candidates (t
);
3676 return error_mark_node
;
3679 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3681 if (complain
& tf_error
)
3682 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3684 return error_mark_node
;
3686 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3688 if (complain
& tf_error
)
3689 error ("%<typename %T::%D%> names %q#T, which is not a type",
3691 return error_mark_node
;
3694 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3695 return error_mark_node
;
3697 /* If we are currently parsing a template and if T is a typedef accessed
3698 through CONTEXT then we need to remember and check access of T at
3699 template instantiation time. */
3700 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3703 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3705 /*entering_scope=*/0,
3706 complain
| tf_user
);
3708 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3711 maybe_record_typedef_use (t
);
3716 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3717 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3718 in which case error_mark_node is returned.
3720 If PARM_LIST is non-NULL, also make sure that the template parameter
3721 list of TEMPLATE_DECL matches.
3723 If COMPLAIN zero, don't complain about any errors that occur. */
3726 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3727 tsubst_flags_t complain
)
3733 name
= TYPE_IDENTIFIER (name
);
3734 else if (DECL_P (name
))
3735 name
= DECL_NAME (name
);
3736 gcc_assert (identifier_p (name
));
3738 if (!dependent_type_p (context
)
3739 || currently_open_class (context
))
3741 tree tmpl
= NULL_TREE
;
3743 if (MAYBE_CLASS_TYPE_P (context
))
3744 tmpl
= lookup_field (context
, name
, 0, false);
3746 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3747 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3749 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3751 if (complain
& tf_error
)
3752 error ("no class template named %q#T in %q#T", name
, context
);
3753 return error_mark_node
;
3757 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3759 if (complain
& tf_error
)
3761 error ("template parameters do not match template %qD", tmpl
);
3762 inform (DECL_SOURCE_LOCATION (tmpl
),
3763 "%qD declared here", tmpl
);
3765 return error_mark_node
;
3768 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3770 return error_mark_node
;
3775 /* Build the UNBOUND_CLASS_TEMPLATE. */
3776 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3777 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3778 TREE_TYPE (t
) = NULL_TREE
;
3779 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3781 /* Build the corresponding TEMPLATE_DECL. */
3782 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3783 TYPE_NAME (TREE_TYPE (d
)) = d
;
3784 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3785 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3786 DECL_ARTIFICIAL (d
) = 1;
3787 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3794 /* Push the declarations of builtin types into the namespace.
3795 RID_INDEX is the index of the builtin type in the array
3796 RID_POINTERS. NAME is the name used when looking up the builtin
3797 type. TYPE is the _TYPE node for the builtin type. */
3800 record_builtin_type (enum rid rid_index
,
3804 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3805 tree tdecl
= NULL_TREE
;
3807 if ((int) rid_index
< (int) RID_MAX
)
3808 rname
= ridpointers
[(int) rid_index
];
3810 tname
= get_identifier (name
);
3812 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3813 eliminated. Built-in types should not be looked up name; their
3814 names are keywords that the parser can recognize. However, there
3815 is code in c-common.c that uses identifier_global_value to look
3816 up built-in types by name. */
3819 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3820 DECL_ARTIFICIAL (tdecl
) = 1;
3821 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3827 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3828 DECL_ARTIFICIAL (tdecl
) = 1;
3830 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3833 if (!TYPE_NAME (type
))
3834 TYPE_NAME (type
) = tdecl
;
3837 debug_hooks
->type_decl (tdecl
, 0);
3840 /* Record one of the standard Java types.
3841 * Declare it as having the given NAME.
3842 * If SIZE > 0, it is the size of one of the integral types;
3843 * otherwise it is the negative of the size of one of the other types. */
3846 record_builtin_java_type (const char* name
, int size
)
3851 type
= build_nonstandard_integer_type (size
, 0);
3852 type
= build_distinct_type_copy (type
);
3854 else if (size
> -32)
3857 /* "__java_char" or ""__java_boolean". */
3858 type
= build_nonstandard_integer_type (-size
, 1);
3859 type
= build_distinct_type_copy (type
);
3860 /* Get the signed type cached and attached to the unsigned type,
3861 so it doesn't get garbage-collected at "random" times,
3862 causing potential codegen differences out of different UIDs
3863 and different alias set numbers. */
3864 stype
= build_nonstandard_integer_type (-size
, 0);
3865 stype
= build_distinct_type_copy (stype
);
3866 TREE_CHAIN (type
) = stype
;
3867 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3870 { /* "__java_float" or ""__java_double". */
3871 type
= make_node (REAL_TYPE
);
3872 TYPE_PRECISION (type
) = - size
;
3875 record_builtin_type (RID_MAX
, name
, type
);
3876 decl
= TYPE_NAME (type
);
3878 /* Suppress generate debug symbol entries for these types,
3879 since for normal C++ they are just clutter.
3880 However, push_lang_context undoes this if extern "Java" is seen. */
3881 DECL_IGNORED_P (decl
) = 1;
3883 TYPE_FOR_JAVA (type
) = 1;
3887 /* Push a type into the namespace so that the back ends ignore it. */
3890 record_unknown_type (tree type
, const char* name
)
3892 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3893 TYPE_DECL
, get_identifier (name
), type
));
3894 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3895 DECL_IGNORED_P (decl
) = 1;
3896 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3897 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3898 SET_TYPE_ALIGN (type
, 1);
3899 TYPE_USER_ALIGN (type
) = 0;
3900 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3903 /* A string for which we should create an IDENTIFIER_NODE at
3906 struct predefined_identifier
3908 /* The name of the identifier. */
3909 const char *const name
;
3910 /* The place where the IDENTIFIER_NODE should be stored. */
3912 /* Nonzero if this is the name of a constructor or destructor. */
3913 const int ctor_or_dtor_p
;
3916 /* Create all the predefined identifiers. */
3919 initialize_predefined_identifiers (void)
3921 const predefined_identifier
*pid
;
3923 /* A table of identifiers to create at startup. */
3924 static const predefined_identifier predefined_identifiers
[] = {
3925 { "C++", &lang_name_cplusplus
, 0 },
3926 { "C", &lang_name_c
, 0 },
3927 { "Java", &lang_name_java
, 0 },
3928 /* Some of these names have a trailing space so that it is
3929 impossible for them to conflict with names written by users. */
3930 { "__ct ", &ctor_identifier
, 1 },
3931 { "__base_ctor ", &base_ctor_identifier
, 1 },
3932 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3933 { "__dt ", &dtor_identifier
, 1 },
3934 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3935 { "__base_dtor ", &base_dtor_identifier
, 1 },
3936 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3937 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3938 { "nelts", &nelts_identifier
, 0 },
3939 { THIS_NAME
, &this_identifier
, 0 },
3940 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3941 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3942 { "_vptr", &vptr_identifier
, 0 },
3943 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3944 { "::", &global_scope_name
, 0 },
3945 { "std", &std_identifier
, 0 },
3949 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3951 *pid
->node
= get_identifier (pid
->name
);
3952 if (pid
->ctor_or_dtor_p
)
3953 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3957 /* Create the predefined scalar types of C,
3958 and some nodes representing standard constants (0, 1, (void *)0).
3959 Initialize the global binding level.
3960 Make definitions for built-in primitive functions. */
3963 cxx_init_decl_processing (void)
3966 tree void_ftype_ptr
;
3968 /* Create all the identifiers we need. */
3969 initialize_predefined_identifiers ();
3971 /* Create the global variables. */
3972 push_to_top_level ();
3974 current_function_decl
= NULL_TREE
;
3975 current_binding_level
= NULL
;
3976 /* Enter the global namespace. */
3977 gcc_assert (global_namespace
== NULL_TREE
);
3978 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3980 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3981 debug_hooks
->register_main_translation_unit
3982 (DECL_CONTEXT (global_namespace
));
3983 TREE_PUBLIC (global_namespace
) = 1;
3984 begin_scope (sk_namespace
, global_namespace
);
3986 if (flag_visibility_ms_compat
)
3987 default_visibility
= VISIBILITY_HIDDEN
;
3990 current_lang_name
= lang_name_c
;
3992 /* Create the `std' namespace. */
3993 push_namespace (std_identifier
);
3994 std_node
= current_namespace
;
3997 c_common_nodes_and_builtins ();
3999 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
4000 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
4001 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
4002 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
4003 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
4004 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
4005 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
4006 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
4008 integer_two_node
= build_int_cst (NULL_TREE
, 2);
4010 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
4011 truthvalue_type_node
= boolean_type_node
;
4012 truthvalue_false_node
= boolean_false_node
;
4013 truthvalue_true_node
= boolean_true_node
;
4015 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
4016 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
4017 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
4020 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
4023 delta_type_node
= ptrdiff_type_node
;
4024 vtable_index_type
= ptrdiff_type_node
;
4026 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
4027 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
4028 void_ftype_ptr
= build_function_type_list (void_type_node
,
4029 ptr_type_node
, NULL_TREE
);
4031 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
4033 /* C++ extensions */
4035 unknown_type_node
= make_node (LANG_TYPE
);
4036 record_unknown_type (unknown_type_node
, "unknown type");
4038 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
4039 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
4041 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
4043 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
4044 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
4046 init_list_type_node
= make_node (LANG_TYPE
);
4047 record_unknown_type (init_list_type_node
, "init list");
4050 /* Make sure we get a unique function type, so we can give
4051 its pointer type a name. (This wins for gdb.) */
4052 tree vfunc_type
= make_node (FUNCTION_TYPE
);
4053 TREE_TYPE (vfunc_type
) = integer_type_node
;
4054 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
4055 layout_type (vfunc_type
);
4057 vtable_entry_type
= build_pointer_type (vfunc_type
);
4059 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
4062 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
4063 layout_type (vtbl_type_node
);
4064 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
4065 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
4066 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
4067 layout_type (vtbl_ptr_type_node
);
4068 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
4070 push_namespace (get_identifier ("__cxxabiv1"));
4071 abi_node
= current_namespace
;
4074 global_type_node
= make_node (LANG_TYPE
);
4075 record_unknown_type (global_type_node
, "global type");
4078 current_lang_name
= lang_name_cplusplus
;
4081 tree newattrs
, extvisattr
;
4082 tree newtype
, deltype
;
4083 tree ptr_ftype_sizetype
;
4087 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
4088 if (cxx_dialect
== cxx98
)
4091 tree bad_alloc_type_node
;
4092 tree bad_alloc_decl
;
4094 push_namespace (std_identifier
);
4095 bad_alloc_id
= get_identifier ("bad_alloc");
4096 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
4097 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
4099 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
4100 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
4104 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
4107 new_eh_spec
= noexcept_false_spec
;
4109 /* Ensure attribs.c is initialized. */
4112 /* Ensure constraint.cc is initialized. */
4113 init_constraint_processing ();
4115 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
4117 newattrs
= tree_cons (get_identifier ("alloc_size"),
4118 build_tree_list (NULL_TREE
, integer_one_node
),
4120 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
4121 newtype
= build_exception_variant (newtype
, new_eh_spec
);
4122 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
4123 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4124 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
4125 DECL_IS_MALLOC (opnew
) = 1;
4126 DECL_IS_OPERATOR_NEW (opnew
) = 1;
4127 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
4128 DECL_IS_MALLOC (opnew
) = 1;
4129 DECL_IS_OPERATOR_NEW (opnew
) = 1;
4130 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4131 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4132 if (flag_sized_deallocation
)
4134 /* Also push the sized deallocation variants:
4135 void operator delete(void*, std::size_t) throw();
4136 void operator delete[](void*, std::size_t) throw(); */
4137 tree void_ftype_ptr_size
4138 = build_function_type_list (void_type_node
, ptr_type_node
,
4139 size_type_node
, NULL_TREE
);
4140 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4142 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4143 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4144 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4147 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4148 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4149 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4150 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4151 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4152 if (abi_version_at_least (9))
4153 SET_TYPE_ALIGN (nullptr_type_node
, GET_MODE_ALIGNMENT (ptr_mode
));
4154 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4155 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4156 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4160 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4161 ECF_NORETURN
| ECF_NOTHROW
);
4163 /* Perform other language dependent initializations. */
4164 init_class_processing ();
4165 init_rtti_processing ();
4166 init_template_processing ();
4168 if (flag_exceptions
)
4169 init_exception_processing ();
4171 if (! supports_one_only ())
4174 make_fname_decl
= cp_make_fname_decl
;
4175 start_fname_decls ();
4177 /* Show we use EH for cleanups. */
4178 if (flag_exceptions
)
4179 using_eh_for_cleanups ();
4182 /* Generate an initializer for a function naming variable from
4183 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4184 filled in with the type of the init. */
4187 cp_fname_init (const char* name
, tree
*type_p
)
4189 tree domain
= NULL_TREE
;
4191 tree init
= NULL_TREE
;
4196 length
= strlen (name
);
4197 domain
= build_index_type (size_int (length
));
4198 init
= build_string (length
+ 1, name
);
4201 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4202 type
= build_cplus_array_type (type
, domain
);
4207 TREE_TYPE (init
) = type
;
4209 init
= error_mark_node
;
4214 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4215 the decl, LOC is the location to give the decl, NAME is the
4216 initialization string and TYPE_DEP indicates whether NAME depended
4217 on the type of the function. We make use of that to detect
4218 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4219 at the point of first use, so we mustn't push the decl now. */
4222 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4224 const char *const name
= (type_dep
&& processing_template_decl
4225 ? NULL
: fname_as_string (type_dep
));
4227 tree init
= cp_fname_init (name
, &type
);
4228 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4231 free (CONST_CAST (char *, name
));
4233 /* As we're using pushdecl_with_scope, we must set the context. */
4234 DECL_CONTEXT (decl
) = current_function_decl
;
4236 TREE_STATIC (decl
) = 1;
4237 TREE_READONLY (decl
) = 1;
4238 DECL_ARTIFICIAL (decl
) = 1;
4240 TREE_USED (decl
) = 1;
4242 if (current_function_decl
)
4244 cp_binding_level
*b
= current_binding_level
;
4245 if (b
->kind
== sk_function_parms
)
4246 return error_mark_node
;
4247 while (b
->level_chain
->kind
!= sk_function_parms
)
4249 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4250 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4251 LOOKUP_ONLYCONVERTING
);
4255 DECL_THIS_STATIC (decl
) = true;
4256 pushdecl_top_level_and_finish (decl
, init
);
4263 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4265 tree id
= DECL_NAME (decl
);
4266 const char *name
= IDENTIFIER_POINTER (id
);
4268 retrofit_lang_decl (decl
);
4270 DECL_ARTIFICIAL (decl
) = 1;
4271 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4272 SET_DECL_LANGUAGE (decl
, lang_c
);
4273 /* Runtime library routines are, by definition, available in an
4274 external shared object. */
4275 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4276 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4278 DECL_CONTEXT (decl
) = context
;
4281 pushdecl_top_level (decl
);
4285 /* A function in the user's namespace should have an explicit
4286 declaration before it is used. Mark the built-in function as
4287 anticipated but not actually declared. */
4288 if (name
[0] != '_' || name
[1] != '_')
4289 DECL_ANTICIPATED (decl
) = 1;
4290 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4292 size_t len
= strlen (name
);
4294 /* Treat __*_chk fortification functions as anticipated as well,
4295 unless they are __builtin_*. */
4296 if (len
> strlen ("___chk")
4297 && memcmp (name
+ len
- strlen ("_chk"),
4298 "_chk", strlen ("_chk") + 1) == 0)
4299 DECL_ANTICIPATED (decl
) = 1;
4306 cxx_builtin_function (tree decl
)
4308 tree id
= DECL_NAME (decl
);
4309 const char *name
= IDENTIFIER_POINTER (id
);
4310 /* All builtins that don't begin with an '_' should additionally
4311 go in the 'std' namespace. */
4314 tree decl2
= copy_node(decl
);
4315 push_namespace (std_identifier
);
4316 builtin_function_1 (decl2
, std_node
, false);
4320 return builtin_function_1 (decl
, NULL_TREE
, false);
4323 /* Like cxx_builtin_function, but guarantee the function is added to the global
4324 scope. This is to allow function specific options to add new machine
4325 dependent builtins when the target ISA changes via attribute((target(...)))
4326 which saves space on program startup if the program does not use non-generic
4330 cxx_builtin_function_ext_scope (tree decl
)
4333 tree id
= DECL_NAME (decl
);
4334 const char *name
= IDENTIFIER_POINTER (id
);
4335 /* All builtins that don't begin with an '_' should additionally
4336 go in the 'std' namespace. */
4339 tree decl2
= copy_node(decl
);
4340 push_namespace (std_identifier
);
4341 builtin_function_1 (decl2
, std_node
, true);
4345 return builtin_function_1 (decl
, NULL_TREE
, true);
4348 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4349 function. Not called directly. */
4352 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4355 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4356 DECL_EXTERNAL (fn
) = 1;
4357 TREE_PUBLIC (fn
) = 1;
4358 DECL_ARTIFICIAL (fn
) = 1;
4359 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4360 SET_DECL_LANGUAGE (fn
, lang_c
);
4361 /* Runtime library routines are, by definition, available in an
4362 external shared object. */
4363 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4364 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4365 set_call_expr_flags (fn
, ecf_flags
);
4369 /* Returns the _DECL for a library function with C++ linkage. */
4372 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4375 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4376 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4377 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4381 /* Like build_library_fn, but takes a C string instead of an
4385 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4387 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4390 /* Like build_cp_library_fn, but takes a C string instead of an
4394 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4396 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4400 /* Like build_library_fn, but also pushes the function so that we will
4401 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4402 may throw exceptions listed in RAISES. */
4405 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4410 type
= build_exception_variant (type
, raises
);
4412 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4413 pushdecl_top_level (fn
);
4417 /* Like build_cp_library_fn, but also pushes the function so that it
4418 will be found by normal lookup. */
4421 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4424 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4429 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4433 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4437 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4439 tree type
= build_function_type (void_type_node
, parmtypes
);
4440 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4443 /* Like push_library_fn, but also note that this function throws
4444 and does not return. Used for __throw_foo and the like. */
4447 push_throw_library_fn (tree name
, tree type
)
4449 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4453 /* When we call finish_struct for an anonymous union, we create
4454 default copy constructors and such. But, an anonymous union
4455 shouldn't have such things; this function undoes the damage to the
4456 anonymous union type T.
4458 (The reason that we create the synthesized methods is that we don't
4459 distinguish `union { int i; }' from `typedef union { int i; } U'.
4460 The first is an anonymous union; the second is just an ordinary
4464 fixup_anonymous_aggr (tree t
)
4468 /* Wipe out memory of synthesized methods. */
4469 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4470 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4471 TYPE_HAS_COPY_CTOR (t
) = 0;
4472 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4473 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4474 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4476 /* Splice the implicitly generated functions out of the TYPE_METHODS
4478 q
= &TYPE_METHODS (t
);
4481 if (DECL_ARTIFICIAL (*q
))
4482 *q
= TREE_CHAIN (*q
);
4484 q
= &DECL_CHAIN (*q
);
4487 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4488 if (TYPE_METHODS (t
))
4490 tree decl
= TYPE_MAIN_DECL (t
);
4492 if (TREE_CODE (t
) != UNION_TYPE
)
4493 error_at (DECL_SOURCE_LOCATION (decl
),
4494 "an anonymous struct cannot have function members");
4496 error_at (DECL_SOURCE_LOCATION (decl
),
4497 "an anonymous union cannot have function members");
4500 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4501 assignment operators (because they cannot have these methods themselves).
4502 For anonymous unions this is already checked because they are not allowed
4503 in any union, otherwise we have to check it. */
4504 if (TREE_CODE (t
) != UNION_TYPE
)
4508 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4509 if (TREE_CODE (field
) == FIELD_DECL
)
4511 type
= TREE_TYPE (field
);
4512 if (CLASS_TYPE_P (type
))
4514 if (TYPE_NEEDS_CONSTRUCTING (type
))
4515 error ("member %q+#D with constructor not allowed "
4516 "in anonymous aggregate", field
);
4517 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4518 error ("member %q+#D with destructor not allowed "
4519 "in anonymous aggregate", field
);
4520 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4521 error ("member %q+#D with copy assignment operator "
4522 "not allowed in anonymous aggregate", field
);
4528 /* Warn for an attribute located at LOCATION that appertains to the
4529 class type CLASS_TYPE that has not been properly placed after its
4530 class-key, in it class-specifier. */
4533 warn_misplaced_attr_for_class_type (source_location location
,
4536 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4538 if (warning_at (location
, OPT_Wattributes
,
4539 "attribute ignored in declaration "
4540 "of %q#T", class_type
))
4542 "attribute for %q#T must follow the %qs keyword",
4543 class_type
, class_key_or_enum_as_string (class_type
));
4546 /* Make sure that a declaration with no declarator is well-formed, i.e.
4547 just declares a tagged type or anonymous union.
4549 Returns the type declared; or NULL_TREE if none. */
4552 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4553 bool explicit_type_instantiation_p
)
4555 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4556 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4557 /* If a class, struct, or enum type is declared by the DECLSPECS
4558 (i.e, if a class-specifier, enum-specifier, or non-typename
4559 elaborated-type-specifier appears in the DECLSPECS),
4560 DECLARED_TYPE is set to the corresponding type. */
4561 tree declared_type
= NULL_TREE
;
4562 bool error_p
= false;
4564 if (declspecs
->multiple_types_p
)
4565 error ("multiple types in one declaration");
4566 else if (declspecs
->redefined_builtin_type
)
4568 if (!in_system_header_at (input_location
))
4569 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4570 "redeclaration of C++ built-in type %qT",
4571 declspecs
->redefined_builtin_type
);
4576 && TYPE_P (declspecs
->type
)
4577 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4578 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4579 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4580 declared_type
= declspecs
->type
;
4581 else if (declspecs
->type
== error_mark_node
)
4583 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4584 permerror (input_location
, "declaration does not declare anything");
4585 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4587 error_at (declspecs
->locations
[ds_type_spec
],
4588 "%<auto%> can only be specified for variables "
4589 "or function declarations");
4590 return error_mark_node
;
4592 /* Check for an anonymous union. */
4593 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4594 && TYPE_ANONYMOUS_P (declared_type
))
4596 /* 7/3 In a simple-declaration, the optional init-declarator-list
4597 can be omitted only when declaring a class (clause 9) or
4598 enumeration (7.2), that is, when the decl-specifier-seq contains
4599 either a class-specifier, an elaborated-type-specifier with
4600 a class-key (9.1), or an enum-specifier. In these cases and
4601 whenever a class-specifier or enum-specifier is present in the
4602 decl-specifier-seq, the identifiers in these specifiers are among
4603 the names being declared by the declaration (as class-name,
4604 enum-names, or enumerators, depending on the syntax). In such
4605 cases, and except for the declaration of an unnamed bit-field (9.6),
4606 the decl-specifier-seq shall introduce one or more names into the
4607 program, or shall redeclare a name introduced by a previous
4608 declaration. [Example:
4609 enum { }; // ill-formed
4610 typedef class { }; // ill-formed
4614 error ("missing type-name in typedef-declaration");
4617 /* Anonymous unions are objects, so they can have specifiers. */;
4618 SET_ANON_AGGR_TYPE_P (declared_type
);
4620 if (TREE_CODE (declared_type
) != UNION_TYPE
4621 && !in_system_header_at (input_location
))
4622 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4627 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4628 error_at (declspecs
->locations
[ds_inline
],
4629 "%<inline%> can only be specified for functions");
4630 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4631 error_at (declspecs
->locations
[ds_virtual
],
4632 "%<virtual%> can only be specified for functions");
4634 && (!current_class_type
4635 || current_scope () != current_class_type
))
4636 error_at (declspecs
->locations
[ds_friend
],
4637 "%<friend%> can only be specified inside a class");
4638 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4639 error_at (declspecs
->locations
[ds_explicit
],
4640 "%<explicit%> can only be specified for constructors");
4641 else if (declspecs
->storage_class
)
4642 error_at (declspecs
->locations
[ds_storage_class
],
4643 "a storage class can only be specified for objects "
4645 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4646 error_at (declspecs
->locations
[ds_const
],
4647 "%<const%> can only be specified for objects and "
4649 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4650 error_at (declspecs
->locations
[ds_volatile
],
4651 "%<volatile%> can only be specified for objects and "
4653 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4654 error_at (declspecs
->locations
[ds_restrict
],
4655 "%<__restrict%> can only be specified for objects and "
4657 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4658 error_at (declspecs
->locations
[ds_thread
],
4659 "%<__thread%> can only be specified for objects "
4661 else if (saw_typedef
)
4662 warning_at (declspecs
->locations
[ds_typedef
], 0,
4663 "%<typedef%> was ignored in this declaration");
4664 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4665 error_at (declspecs
->locations
[ds_constexpr
],
4666 "%<constexpr%> cannot be used for type declarations");
4669 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4672 if (!CLASS_TYPE_P (declared_type
)
4673 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4674 /* For a non-template class, use the name location. */
4675 loc
= location_of (declared_type
);
4677 /* For a template class (an explicit instantiation), use the
4678 current location. */
4679 loc
= input_location
;
4681 if (explicit_type_instantiation_p
)
4682 /* [dcl.attr.grammar]/4:
4684 No attribute-specifier-seq shall appertain to an explicit
4687 if (warning_at (loc
, OPT_Wattributes
,
4688 "attribute ignored in explicit instantiation %q#T",
4691 "no attribute can be applied to "
4692 "an explicit instantiation");
4695 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4698 return declared_type
;
4701 /* Called when a declaration is seen that contains no names to declare.
4702 If its type is a reference to a structure, union or enum inherited
4703 from a containing scope, shadow that tag name for the current scope
4704 with a forward reference.
4705 If its type defines a new named structure or union
4706 or defines an enum, it is valid but we need not do anything here.
4707 Otherwise, it is an error.
4709 C++: may have to grok the declspecs to learn about static,
4710 complain for anonymous unions.
4712 Returns the TYPE declared -- or NULL_TREE if none. */
4715 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4717 tree t
= check_tag_decl (declspecs
,
4718 /*explicit_type_instantiation_p=*/false);
4723 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4726 /* This is where the variables in an anonymous union are
4727 declared. An anonymous union declaration looks like:
4729 because there is no declarator after the union, the parser
4730 sends that declaration here. */
4731 if (ANON_AGGR_TYPE_P (t
))
4733 fixup_anonymous_aggr (t
);
4735 if (TYPE_FIELDS (t
))
4737 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4738 declspecs
, NORMAL
, 0, NULL
);
4739 finish_anon_union (decl
);
4746 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4749 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4750 const cp_declarator
*declarator
,
4751 bool is_template_arg
)
4755 enum decl_context context
4756 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4757 attrs
= type_specifiers
->attributes
;
4758 type_specifiers
->attributes
= NULL_TREE
;
4759 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4760 if (attrs
&& type
!= error_mark_node
)
4762 if (CLASS_TYPE_P (type
))
4763 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4764 "outside of definition", type
);
4765 else if (MAYBE_CLASS_TYPE_P (type
))
4766 /* A template type parameter or other dependent type. */
4767 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4768 "type %qT without an associated declaration", type
);
4770 cplus_decl_attributes (&type
, attrs
, 0);
4775 /* Process a DECLARATOR for a function-scope variable declaration,
4776 namespace-scope variable declaration, or function declaration.
4777 (Function definitions go through start_function; class member
4778 declarations appearing in the body of the class go through
4779 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4780 If an error occurs, the error_mark_node is returned instead.
4782 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4783 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4784 for an explicitly defaulted function, or SD_DELETED for an explicitly
4785 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4786 implicitly initialized via a default constructor. ATTRIBUTES and
4787 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4789 The scope represented by the context of the returned DECL is pushed
4790 (if it is not the global namespace) and is assigned to
4791 *PUSHED_SCOPE_P. The caller is then responsible for calling
4792 pop_scope on *PUSHED_SCOPE_P if it is set. */
4795 start_decl (const cp_declarator
*declarator
,
4796 cp_decl_specifier_seq
*declspecs
,
4799 tree prefix_attributes
,
4800 tree
*pushed_scope_p
)
4808 *pushed_scope_p
= NULL_TREE
;
4810 /* An object declared as __attribute__((deprecated)) suppresses
4811 warnings of uses of other deprecated items. */
4812 if (lookup_attribute ("deprecated", attributes
))
4813 deprecated_state
= DEPRECATED_SUPPRESS
;
4815 attributes
= chainon (attributes
, prefix_attributes
);
4817 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4820 deprecated_state
= DEPRECATED_NORMAL
;
4822 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4823 || decl
== error_mark_node
)
4824 return error_mark_node
;
4826 context
= CP_DECL_CONTEXT (decl
);
4827 if (context
!= global_namespace
)
4828 *pushed_scope_p
= push_scope (context
);
4830 /* Is it valid for this decl to have an initializer at all?
4831 If not, set INITIALIZED to zero, which will indirectly
4832 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4834 && TREE_CODE (decl
) == TYPE_DECL
)
4836 error ("typedef %qD is initialized (use decltype instead)", decl
);
4837 return error_mark_node
;
4842 if (! toplevel_bindings_p ()
4843 && DECL_EXTERNAL (decl
))
4844 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4846 DECL_EXTERNAL (decl
) = 0;
4847 if (toplevel_bindings_p ())
4848 TREE_STATIC (decl
) = 1;
4850 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4852 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4853 record_key_method_defined (decl
);
4855 /* If this is a typedef that names the class for linkage purposes
4856 (7.1.3p8), apply any attributes directly to the type. */
4857 if (TREE_CODE (decl
) == TYPE_DECL
4858 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4859 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4860 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4864 /* Set attributes here so if duplicate decl, will have proper attributes. */
4865 cplus_decl_attributes (&decl
, attributes
, flags
);
4867 /* Dllimported symbols cannot be defined. Static data members (which
4868 can be initialized in-class and dllimported) go through grokfield,
4869 not here, so we don't need to exclude those decls when checking for
4871 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4873 error ("definition of %q#D is marked %<dllimport%>", decl
);
4874 DECL_DLLIMPORT_P (decl
) = 0;
4877 /* If #pragma weak was used, mark the decl weak now. */
4878 if (!processing_template_decl
)
4879 maybe_apply_pragma_weak (decl
);
4881 if (TREE_CODE (decl
) == FUNCTION_DECL
4882 && DECL_DECLARED_INLINE_P (decl
)
4883 && DECL_UNINLINABLE (decl
)
4884 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4885 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4886 "inline function %qD given attribute noinline", decl
);
4888 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4890 bool this_tmpl
= (processing_template_decl
4891 > template_class_depth (context
));
4894 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4895 if (field
== NULL_TREE
4896 || !(VAR_P (field
) || variable_template_p (field
)))
4897 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4898 else if (variable_template_p (field
) && !this_tmpl
)
4900 if (DECL_LANG_SPECIFIC (decl
)
4901 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4902 /* OK, specialization was already checked. */;
4905 error_at (DECL_SOURCE_LOCATION (decl
),
4906 "non-member-template declaration of %qD", decl
);
4907 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4908 "member template declaration here");
4909 return error_mark_node
;
4914 if (variable_template_p (field
))
4915 field
= DECL_TEMPLATE_RESULT (field
);
4917 if (DECL_CONTEXT (field
) != context
)
4919 if (!same_type_p (DECL_CONTEXT (field
), context
))
4920 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4921 "to be defined as %<%T::%D%>",
4922 DECL_CONTEXT (field
), DECL_NAME (decl
),
4923 context
, DECL_NAME (decl
));
4924 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4926 /* Static data member are tricky; an in-class initialization
4927 still doesn't provide a definition, so the in-class
4928 declaration will have DECL_EXTERNAL set, but will have an
4929 initialization. Thus, duplicate_decls won't warn
4930 about this situation, and so we check here. */
4931 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4932 error ("duplicate initialization of %qD", decl
);
4933 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4935 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4936 && !DECL_DECLARED_CONSTEXPR_P (field
))
4937 error ("%qD declared %<constexpr%> outside its class", field
);
4942 tree field
= check_classfn (context
, decl
,
4944 ? current_template_parms
4946 if (field
&& field
!= error_mark_node
4947 && duplicate_decls (decl
, field
,
4948 /*newdecl_is_friend=*/false))
4952 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4953 DECL_IN_AGGR_P (decl
) = 0;
4954 /* Do not mark DECL as an explicit specialization if it was not
4955 already marked as an instantiation; a declaration should
4956 never be marked as a specialization unless we know what
4957 template is being specialized. */
4958 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4960 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4961 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4962 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4963 && DECL_DECLARED_INLINE_P (decl
));
4965 DECL_COMDAT (decl
) = false;
4967 /* [temp.expl.spec] An explicit specialization of a static data
4968 member of a template is a definition if the declaration
4969 includes an initializer; otherwise, it is a declaration.
4971 We check for processing_specialization so this only applies
4972 to the new specialization syntax. */
4973 if (!initialized
&& processing_specialization
)
4974 DECL_EXTERNAL (decl
) = 1;
4977 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4978 /* Aliases are definitions. */
4980 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4984 was_public
= TREE_PUBLIC (decl
);
4986 /* Enter this declaration into the symbol table. Don't push the plain
4987 VAR_DECL for a variable template. */
4988 if (!template_parm_scope_p ()
4990 decl
= maybe_push_decl (decl
);
4992 if (processing_template_decl
)
4993 decl
= push_template_decl (decl
);
4994 if (decl
== error_mark_node
)
4995 return error_mark_node
;
4998 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4999 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
5001 /* This is a const variable with implicit 'static'. Set
5002 DECL_THIS_STATIC so we can tell it from variables that are
5003 !TREE_PUBLIC because of the anonymous namespace. */
5004 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
5005 DECL_THIS_STATIC (decl
) = 1;
5008 if (current_function_decl
&& VAR_P (decl
)
5009 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
5012 if (CP_DECL_THREAD_LOCAL_P (decl
))
5013 error ("%qD declared %<thread_local%> in %<constexpr%> function",
5015 else if (TREE_STATIC (decl
))
5016 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
5020 cp_function_chain
->invalid_constexpr
= true;
5023 if (!processing_template_decl
&& VAR_P (decl
))
5024 start_decl_1 (decl
, initialized
);
5029 /* Process the declaration of a variable DECL. INITIALIZED is true
5030 iff DECL is explicitly initialized. (INITIALIZED is false if the
5031 variable is initialized via an implicitly-called constructor.)
5032 This function must be called for ordinary variables (including, for
5033 example, implicit instantiations of templates), but must not be
5034 called for template declarations. */
5037 start_decl_1 (tree decl
, bool initialized
)
5041 bool aggregate_definition_p
;
5043 gcc_assert (!processing_template_decl
);
5045 if (error_operand_p (decl
))
5048 gcc_assert (VAR_P (decl
));
5050 type
= TREE_TYPE (decl
);
5051 complete_p
= COMPLETE_TYPE_P (type
);
5052 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
5054 /* If an explicit initializer is present, or if this is a definition
5055 of an aggregate, then we need a complete type at this point.
5056 (Scalars are always complete types, so there is nothing to
5057 check.) This code just sets COMPLETE_P; errors (if necessary)
5058 are issued below. */
5059 if ((initialized
|| aggregate_definition_p
)
5061 && COMPLETE_TYPE_P (complete_type (type
)))
5064 /* We will not yet have set TREE_READONLY on DECL if the type
5065 was "const", but incomplete, before this point. But, now, we
5066 have a complete type, so we can try again. */
5067 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
5071 /* Is it valid for this decl to have an initializer at all? */
5073 /* Don't allow initializations for incomplete types except for
5074 arrays which might be completed by the initialization. */
5076 ; /* A complete type is ok. */
5077 else if (type_uses_auto (type
))
5078 ; /* An auto type is ok. */
5079 else if (TREE_CODE (type
) != ARRAY_TYPE
)
5081 error ("variable %q#D has initializer but incomplete type", decl
);
5082 type
= TREE_TYPE (decl
) = error_mark_node
;
5084 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
5086 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
5087 error ("elements of array %q#D have incomplete type", decl
);
5088 /* else we already gave an error in start_decl. */
5091 else if (aggregate_definition_p
&& !complete_p
)
5093 if (type_uses_auto (type
))
5094 error ("declaration of %q#D has no initializer", decl
);
5096 error ("aggregate %q#D has incomplete type and cannot be defined",
5098 /* Change the type so that assemble_variable will give
5099 DECL an rtl we can live with: (mem (const_int 0)). */
5100 type
= TREE_TYPE (decl
) = error_mark_node
;
5103 /* Create a new scope to hold this declaration if necessary.
5104 Whether or not a new scope is necessary cannot be determined
5105 until after the type has been completed; if the type is a
5106 specialization of a class template it is not until after
5107 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5108 will be set correctly. */
5109 maybe_push_cleanup_level (type
);
5112 /* Handle initialization of references. DECL, TYPE, and INIT have the
5113 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5114 but will be set to a new CLEANUP_STMT if a temporary is created
5115 that must be destroyed subsequently.
5117 Returns an initializer expression to use to initialize DECL, or
5118 NULL if the initialization can be performed statically.
5120 Quotes on semantics can be found in ARM 8.4.3. */
5123 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
5125 if (init
== NULL_TREE
)
5127 if ((DECL_LANG_SPECIFIC (decl
) == 0
5128 || DECL_IN_AGGR_P (decl
) == 0)
5129 && ! DECL_THIS_EXTERN (decl
))
5130 error ("%qD declared as reference but not initialized", decl
);
5134 if (TREE_CODE (init
) == TREE_LIST
)
5135 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5136 tf_warning_or_error
);
5138 tree ttype
= TREE_TYPE (type
);
5139 if (TREE_CODE (ttype
) != ARRAY_TYPE
5140 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
5141 /* Note: default conversion is only called in very special cases. */
5142 init
= decay_conversion (init
, tf_warning_or_error
);
5144 /* check_initializer handles this for non-reference variables, but for
5145 references we need to do it here or the initializer will get the
5146 incomplete array type and confuse later calls to
5147 cp_complete_array_type. */
5148 if (TREE_CODE (ttype
) == ARRAY_TYPE
5149 && TYPE_DOMAIN (ttype
) == NULL_TREE
5150 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
5151 || TREE_CODE (init
) == STRING_CST
))
5153 cp_complete_array_type (&ttype
, init
, false);
5154 if (ttype
!= TREE_TYPE (type
))
5155 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5158 /* Convert INIT to the reference type TYPE. This may involve the
5159 creation of a temporary, whose lifetime must be the same as that
5160 of the reference. If so, a DECL_EXPR for the temporary will be
5161 added just after the DECL_EXPR for DECL. That's why we don't set
5162 DECL_INITIAL for local references (instead assigning to them
5163 explicitly); we need to allow the temporary to be initialized
5165 return initialize_reference (type
, init
, flags
,
5166 tf_warning_or_error
);
5169 /* Designated initializers in arrays are not supported in GNU C++.
5170 The parser cannot detect this error since it does not know whether
5171 a given brace-enclosed initializer is for a class type or for an
5172 array. This function checks that CE does not use a designated
5173 initializer. If it does, an error is issued. Returns true if CE
5174 is valid, i.e., does not have a designated initializer. */
5177 check_array_designated_initializer (constructor_elt
*ce
,
5178 unsigned HOST_WIDE_INT index
)
5180 /* Designated initializers for array elements are not supported. */
5183 /* The parser only allows identifiers as designated
5185 if (ce
->index
== error_mark_node
)
5187 error ("name used in a GNU-style designated "
5188 "initializer for an array");
5191 else if (identifier_p (ce
->index
))
5193 error ("name %qD used in a GNU-style designated "
5194 "initializer for an array", ce
->index
);
5198 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5201 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5202 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5205 /* A C99 designator is OK if it matches the current index. */
5206 if (wi::eq_p (ce_index
, index
))
5209 sorry ("non-trivial designated initializers not supported");
5212 error ("C99 designator %qE is not an integral constant-expression",
5221 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5222 array until we finish parsing the initializer. If that's the
5223 situation we're in, update DECL accordingly. */
5226 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5228 tree type
= TREE_TYPE (decl
);
5230 if (TREE_CODE (type
) == ARRAY_TYPE
5231 && TYPE_DOMAIN (type
) == NULL_TREE
5232 && TREE_CODE (decl
) != TYPE_DECL
)
5234 /* do_default is really a C-ism to deal with tentative definitions.
5235 But let's leave it here to ease the eventual merge. */
5236 int do_default
= !DECL_EXTERNAL (decl
);
5237 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5240 /* Check that there are no designated initializers in INIT, as
5241 those are not supported in GNU C++, and as the middle-end
5242 will crash if presented with a non-numeric designated
5244 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5246 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5247 constructor_elt
*ce
;
5249 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5250 if (!check_array_designated_initializer (ce
, i
))
5256 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5260 error ("initializer fails to determine size of %qD", decl
);
5262 else if (failure
== 2)
5266 error ("array size missing in %qD", decl
);
5268 /* If a `static' var's size isn't known, make it extern as
5269 well as static, so it does not get allocated. If it's not
5270 `static', then don't mark it extern; finish_incomplete_decl
5271 will give it a default size and it will get allocated. */
5272 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5273 DECL_EXTERNAL (decl
) = 1;
5275 else if (failure
== 3)
5277 error ("zero-size array %qD", decl
);
5281 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5283 relayout_decl (decl
);
5287 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5288 any appropriate error messages regarding the layout. */
5291 layout_var_decl (tree decl
)
5295 type
= TREE_TYPE (decl
);
5296 if (type
== error_mark_node
)
5299 /* If we haven't already laid out this declaration, do so now.
5300 Note that we must not call complete type for an external object
5301 because it's type might involve templates that we are not
5302 supposed to instantiate yet. (And it's perfectly valid to say
5303 `extern X x' for some incomplete type `X'.) */
5304 if (!DECL_EXTERNAL (decl
))
5305 complete_type (type
);
5306 if (!DECL_SIZE (decl
)
5307 && TREE_TYPE (decl
) != error_mark_node
5308 && (COMPLETE_TYPE_P (type
)
5309 || (TREE_CODE (type
) == ARRAY_TYPE
5310 && !TYPE_DOMAIN (type
)
5311 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5312 layout_decl (decl
, 0);
5314 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5316 /* An automatic variable with an incomplete type: that is an error.
5317 Don't talk about array types here, since we took care of that
5318 message in grokdeclarator. */
5319 error ("storage size of %qD isn%'t known", decl
);
5320 TREE_TYPE (decl
) = error_mark_node
;
5323 /* Keep this code around in case we later want to control debug info
5324 based on whether a type is "used". (jason 1999-11-11) */
5326 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5327 /* Let debugger know it should output info for this type. */
5328 note_debug_info_needed (ttype
);
5330 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5331 note_debug_info_needed (DECL_CONTEXT (decl
));
5334 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5335 && DECL_SIZE (decl
) != NULL_TREE
5336 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5338 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5339 constant_expression_warning (DECL_SIZE (decl
));
5342 error ("storage size of %qD isn%'t constant", decl
);
5343 TREE_TYPE (decl
) = error_mark_node
;
5348 /* If a local static variable is declared in an inline function, or if
5349 we have a weak definition, we must endeavor to create only one
5350 instance of the variable at link-time. */
5353 maybe_commonize_var (tree decl
)
5355 /* Static data in a function with comdat linkage also has comdat
5357 if (TREE_STATIC (decl
)
5358 /* Don't mess with __FUNCTION__. */
5359 && ! DECL_ARTIFICIAL (decl
)
5360 && DECL_FUNCTION_SCOPE_P (decl
)
5361 && vague_linkage_p (DECL_CONTEXT (decl
)))
5365 /* With weak symbols, we simply make the variable COMDAT;
5366 that will cause copies in multiple translations units to
5368 comdat_linkage (decl
);
5372 if (DECL_INITIAL (decl
) == NULL_TREE
5373 || DECL_INITIAL (decl
) == error_mark_node
)
5375 /* Without weak symbols, we can use COMMON to merge
5376 uninitialized variables. */
5377 TREE_PUBLIC (decl
) = 1;
5378 DECL_COMMON (decl
) = 1;
5382 /* While for initialized variables, we must use internal
5383 linkage -- which means that multiple copies will not
5385 TREE_PUBLIC (decl
) = 0;
5386 DECL_COMMON (decl
) = 0;
5387 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5388 "sorry: semantics of inline function static "
5389 "data %q#D are wrong (you%'ll wind up "
5390 "with multiple copies)", decl
))
5391 inform (DECL_SOURCE_LOCATION (decl
),
5392 "you can work around this by removing the initializer");
5398 /* Issue an error message if DECL is an uninitialized const variable. */
5401 check_for_uninitialized_const_var (tree decl
)
5403 tree type
= strip_array_types (TREE_TYPE (decl
));
5405 /* ``Unless explicitly declared extern, a const object does not have
5406 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5409 && TREE_CODE (type
) != REFERENCE_TYPE
5410 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5411 && !DECL_INITIAL (decl
))
5413 tree field
= default_init_uninitialized_part (type
);
5417 if (CP_TYPE_CONST_P (type
))
5418 permerror (DECL_SOURCE_LOCATION (decl
),
5419 "uninitialized const %qD", decl
);
5422 error_at (DECL_SOURCE_LOCATION (decl
),
5423 "uninitialized variable %qD in %<constexpr%> function",
5425 cp_function_chain
->invalid_constexpr
= true;
5428 if (CLASS_TYPE_P (type
))
5430 tree defaulted_ctor
;
5432 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5433 "%q#T has no user-provided default constructor", type
);
5434 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5436 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5437 "constructor is not user-provided because it is "
5438 "explicitly defaulted in the class body");
5439 inform (DECL_SOURCE_LOCATION (field
),
5440 "and the implicitly-defined constructor does not "
5441 "initialize %q#D", field
);
5446 /* Structure holding the current initializer being processed by reshape_init.
5447 CUR is a pointer to the current element being processed, END is a pointer
5448 after the last element present in the initializer. */
5451 constructor_elt
*cur
;
5452 constructor_elt
*end
;
5455 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5457 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5458 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5459 initialized. If there are no more such fields, the return value
5463 next_initializable_field (tree field
)
5466 && (TREE_CODE (field
) != FIELD_DECL
5467 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5468 || DECL_ARTIFICIAL (field
)))
5469 field
= DECL_CHAIN (field
);
5474 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5475 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5476 INTEGER_CST representing the size of the array minus one (the maximum index),
5477 or NULL_TREE if the array was declared without specifying the size. D is
5478 the iterator within the constructor. */
5481 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5482 tsubst_flags_t complain
)
5485 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5486 unsigned HOST_WIDE_INT max_index_cst
= 0;
5487 unsigned HOST_WIDE_INT index
;
5489 /* The initializer for an array is always a CONSTRUCTOR. */
5490 new_init
= build_constructor (init_list_type_node
, NULL
);
5494 /* Minus 1 is used for zero sized arrays. */
5495 if (integer_all_onesp (max_index
))
5498 if (tree_fits_uhwi_p (max_index
))
5499 max_index_cst
= tree_to_uhwi (max_index
);
5500 /* sizetype is sign extended, not zero extended. */
5502 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5505 /* Loop until there are no more initializers. */
5507 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5511 constructor_elt
*old_cur
= d
->cur
;
5513 check_array_designated_initializer (d
->cur
, index
);
5514 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5516 if (elt_init
== error_mark_node
)
5517 return error_mark_node
;
5518 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5519 size_int (index
), elt_init
);
5520 if (!TREE_CONSTANT (elt_init
))
5521 TREE_CONSTANT (new_init
) = false;
5523 /* This can happen with an invalid initializer (c++/54501). */
5524 if (d
->cur
== old_cur
&& !sized_array_p
)
5531 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5532 Parameters are the same of reshape_init_r. */
5535 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5537 tree max_index
= NULL_TREE
;
5539 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5541 if (TYPE_DOMAIN (type
))
5542 max_index
= array_type_nelts (type
);
5544 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5547 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5548 Parameters are the same of reshape_init_r. */
5551 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5553 tree max_index
= NULL_TREE
;
5555 gcc_assert (VECTOR_TYPE_P (type
));
5557 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5559 tree value
= d
->cur
->value
;
5560 if (!same_type_p (TREE_TYPE (value
), type
))
5562 if (complain
& tf_error
)
5563 error ("invalid type %qT as initializer for a vector of type %qT",
5564 TREE_TYPE (d
->cur
->value
), type
);
5565 value
= error_mark_node
;
5571 /* For a vector, we initialize it as an array of the appropriate size. */
5572 if (VECTOR_TYPE_P (type
))
5573 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5575 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5578 /* Subroutine of reshape_init_r, processes the initializers for classes
5579 or union. Parameters are the same of reshape_init_r. */
5582 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5583 tsubst_flags_t complain
)
5588 gcc_assert (CLASS_TYPE_P (type
));
5590 /* The initializer for a class is always a CONSTRUCTOR. */
5591 new_init
= build_constructor (init_list_type_node
, NULL
);
5592 field
= next_initializable_field (TYPE_FIELDS (type
));
5598 An initializer for an aggregate member that is an
5599 empty class shall have the form of an empty
5600 initializer-list {}. */
5601 if (!first_initializer_p
)
5603 if (complain
& tf_error
)
5604 error ("initializer for %qT must be brace-enclosed", type
);
5605 return error_mark_node
;
5610 /* Loop through the initializable fields, gathering initializers. */
5611 while (d
->cur
!= d
->end
)
5614 constructor_elt
*old_cur
= d
->cur
;
5616 /* Handle designated initializers, as an extension. */
5619 if (d
->cur
->index
== error_mark_node
)
5620 return error_mark_node
;
5622 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5623 /* We already reshaped this. */
5624 gcc_assert (d
->cur
->index
== field
);
5625 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5626 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5629 if (complain
& tf_error
)
5630 error ("%<[%E] =%> used in a GNU-style designated initializer"
5631 " for class %qT", d
->cur
->index
, type
);
5632 return error_mark_node
;
5635 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5637 if (complain
& tf_error
)
5638 error ("%qT has no non-static data member named %qD", type
,
5640 return error_mark_node
;
5644 /* If we processed all the member of the class, we are done. */
5648 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5649 /*first_initializer_p=*/false, complain
);
5650 if (field_init
== error_mark_node
)
5651 return error_mark_node
;
5653 if (d
->cur
== old_cur
&& d
->cur
->index
)
5655 /* This can happen with an invalid initializer for a flexible
5656 array member (c++/54441). */
5657 if (complain
& tf_error
)
5658 error ("invalid initializer for %q#D", field
);
5659 return error_mark_node
;
5662 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5666 When a union is initialized with a brace-enclosed
5667 initializer, the braces shall only contain an
5668 initializer for the first member of the union. */
5669 if (TREE_CODE (type
) == UNION_TYPE
)
5672 field
= next_initializable_field (DECL_CHAIN (field
));
5678 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5679 designators are not valid; either complain or return true to indicate
5680 that reshape_init_r should return error_mark_node. */
5683 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5687 if (complain
& tf_error
)
5688 error ("C99 designator %qE outside aggregate initializer",
5696 /* Subroutine of reshape_init, which processes a single initializer (part of
5697 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5698 iterator within the CONSTRUCTOR which points to the initializer to process.
5699 FIRST_INITIALIZER_P is true if this is the first initializer of the
5700 outermost CONSTRUCTOR node. */
5703 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5704 tsubst_flags_t complain
)
5706 tree init
= d
->cur
->value
;
5708 if (error_operand_p (init
))
5709 return error_mark_node
;
5711 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5712 && has_designator_problem (d
, complain
))
5713 return error_mark_node
;
5715 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5717 /* A complex type can be initialized from one or two initializers,
5718 but braces are not elided. */
5720 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5722 if (CONSTRUCTOR_NELTS (init
) > 2)
5724 if (complain
& tf_error
)
5725 error ("too many initializers for %qT", type
);
5727 return error_mark_node
;
5730 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5732 vec
<constructor_elt
, va_gc
> *v
= 0;
5733 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5734 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5735 if (has_designator_problem (d
, complain
))
5736 return error_mark_node
;
5738 init
= build_constructor (init_list_type_node
, v
);
5743 /* A non-aggregate type is always initialized with a single
5745 if (!CP_AGGREGATE_TYPE_P (type
))
5747 /* It is invalid to initialize a non-aggregate type with a
5748 brace-enclosed initializer before C++0x.
5749 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5750 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5751 a CONSTRUCTOR (with a record type). */
5752 if (TREE_CODE (init
) == CONSTRUCTOR
5753 /* Don't complain about a capture-init. */
5754 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5755 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5757 if (SCALAR_TYPE_P (type
))
5759 if (cxx_dialect
< cxx11
5760 /* Isn't value-initialization. */
5761 || CONSTRUCTOR_NELTS (init
) > 0)
5763 if (complain
& tf_error
)
5764 error ("braces around scalar initializer for type %qT",
5766 init
= error_mark_node
;
5770 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5777 /* "If T is a class type and the initializer list has a single element of
5778 type cv U, where U is T or a class derived from T, the object is
5779 initialized from that element." Even if T is an aggregate. */
5780 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5781 && first_initializer_p
5782 && d
->end
- d
->cur
== 1
5783 && reference_related_p (type
, TREE_TYPE (init
)))
5791 All implicit type conversions (clause _conv_) are considered when
5792 initializing the aggregate member with an initializer from an
5793 initializer-list. If the initializer can initialize a member,
5794 the member is initialized. Otherwise, if the member is itself a
5795 non-empty subaggregate, brace elision is assumed and the
5796 initializer is considered for the initialization of the first
5797 member of the subaggregate. */
5798 if (TREE_CODE (init
) != CONSTRUCTOR
5799 /* But don't try this for the first initializer, since that would be
5800 looking through the outermost braces; A a2 = { a1 }; is not a
5801 valid aggregate initialization. */
5802 && !first_initializer_p
5803 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5804 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5811 /* [dcl.init.string]
5813 A char array (whether plain char, signed char, or unsigned char)
5814 can be initialized by a string-literal (optionally enclosed in
5815 braces); a wchar_t array can be initialized by a wide
5816 string-literal (optionally enclosed in braces). */
5817 if (TREE_CODE (type
) == ARRAY_TYPE
5818 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5820 tree str_init
= init
;
5822 /* Strip one level of braces if and only if they enclose a single
5823 element (as allowed by [dcl.init.string]). */
5824 if (!first_initializer_p
5825 && TREE_CODE (str_init
) == CONSTRUCTOR
5826 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5828 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5831 /* If it's a string literal, then it's the initializer for the array
5832 as a whole. Otherwise, continue with normal initialization for
5833 array types (one value per array element). */
5834 if (TREE_CODE (str_init
) == STRING_CST
)
5836 if (has_designator_problem (d
, complain
))
5837 return error_mark_node
;
5843 /* The following cases are about aggregates. If we are not within a full
5844 initializer already, and there is not a CONSTRUCTOR, it means that there
5845 is a missing set of braces (that is, we are processing the case for
5846 which reshape_init exists). */
5847 if (!first_initializer_p
)
5849 if (TREE_CODE (init
) == CONSTRUCTOR
)
5851 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5852 /* There is no need to reshape pointer-to-member function
5853 initializers, as they are always constructed correctly
5854 by the front end. */
5856 else if (COMPOUND_LITERAL_P (init
))
5857 /* For a nested compound literal, there is no need to reshape since
5858 brace elision is not allowed. Even if we decided to allow it,
5859 we should add a call to reshape_init in finish_compound_literal,
5860 before calling digest_init, so changing this code would still
5861 not be necessary. */
5862 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5866 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5867 return reshape_init (type
, init
, complain
);
5871 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5875 /* Dispatch to specialized routines. */
5876 if (CLASS_TYPE_P (type
))
5877 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5878 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5879 return reshape_init_array (type
, d
, complain
);
5880 else if (VECTOR_TYPE_P (type
))
5881 return reshape_init_vector (type
, d
, complain
);
5886 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5887 brace-enclosed aggregate initializer.
5889 INIT is the CONSTRUCTOR containing the list of initializers describing
5890 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5891 It may not presently match the shape of the TYPE; for example:
5893 struct S { int a; int b; };
5894 struct S a[] = { 1, 2, 3, 4 };
5896 Here INIT will hold a vector of four elements, rather than a
5897 vector of two elements, each itself a vector of two elements. This
5898 routine transforms INIT from the former form into the latter. The
5899 revised CONSTRUCTOR node is returned. */
5902 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5904 vec
<constructor_elt
, va_gc
> *v
;
5908 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5910 v
= CONSTRUCTOR_ELTS (init
);
5912 /* An empty constructor does not need reshaping, and it is always a valid
5914 if (vec_safe_is_empty (v
))
5917 /* Recurse on this CONSTRUCTOR. */
5919 d
.end
= d
.cur
+ v
->length ();
5921 new_init
= reshape_init_r (type
, &d
, true, complain
);
5922 if (new_init
== error_mark_node
)
5923 return error_mark_node
;
5925 /* Make sure all the element of the constructor were used. Otherwise,
5926 issue an error about exceeding initializers. */
5929 if (complain
& tf_error
)
5930 error ("too many initializers for %qT", type
);
5932 return error_mark_node
;
5938 /* Verify array initializer. Returns true if errors have been reported. */
5941 check_array_initializer (tree decl
, tree type
, tree init
)
5943 tree element_type
= TREE_TYPE (type
);
5945 /* The array type itself need not be complete, because the
5946 initializer may tell us how many elements are in the array.
5947 But, the elements of the array must be complete. */
5948 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5951 error ("elements of array %q#D have incomplete type", decl
);
5953 error ("elements of array %q#T have incomplete type", type
);
5956 /* A compound literal can't have variable size. */
5958 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5959 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5961 error ("variable-sized compound literal");
5967 /* Subroutine of check_initializer; args are passed down from that function.
5968 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5971 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5974 gcc_assert (stmts_are_full_exprs_p ());
5975 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5978 /* Verify INIT (the initializer for DECL), and record the
5979 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5980 grok_reference_init.
5982 If the return value is non-NULL, it is an expression that must be
5983 evaluated dynamically to initialize DECL. */
5986 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5988 tree type
= TREE_TYPE (decl
);
5989 tree init_code
= NULL
;
5992 /* Things that are going to be initialized need to have complete
5994 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5996 if (DECL_HAS_VALUE_EXPR_P (decl
))
5998 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5999 it doesn't have storage to be initialized. */
6000 gcc_assert (init
== NULL_TREE
);
6004 if (type
== error_mark_node
)
6005 /* We will have already complained. */
6008 if (TREE_CODE (type
) == ARRAY_TYPE
)
6010 if (check_array_initializer (decl
, type
, init
))
6013 else if (!COMPLETE_TYPE_P (type
))
6015 error ("%q#D has incomplete type", decl
);
6016 TREE_TYPE (decl
) = error_mark_node
;
6020 /* There is no way to make a variable-sized class type in GNU C++. */
6021 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
6023 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
6025 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
6026 if (SCALAR_TYPE_P (type
))
6030 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
6031 init
= build_zero_init (type
, NULL_TREE
, false);
6033 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
6035 error ("scalar object %qD requires one element in initializer",
6037 TREE_TYPE (decl
) = error_mark_node
;
6043 if (TREE_CODE (decl
) == CONST_DECL
)
6045 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
6047 DECL_INITIAL (decl
) = init
;
6049 gcc_assert (init
!= NULL_TREE
);
6052 else if (!init
&& DECL_REALLY_EXTERN (decl
))
6054 else if (init
|| type_build_ctor_call (type
)
6055 || TREE_CODE (type
) == REFERENCE_TYPE
)
6057 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6059 init
= grok_reference_init (decl
, type
, init
, flags
);
6060 flags
|= LOOKUP_ALREADY_DIGESTED
;
6063 check_for_uninitialized_const_var (decl
);
6064 /* Do not reshape constructors of vectors (they don't need to be
6066 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
6068 if (is_std_init_list (type
))
6070 init
= perform_implicit_conversion (type
, init
,
6071 tf_warning_or_error
);
6072 flags
|= LOOKUP_ALREADY_DIGESTED
;
6074 else if (TYPE_NON_AGGREGATE_CLASS (type
))
6076 /* Don't reshape if the class has constructors. */
6077 if (cxx_dialect
== cxx98
)
6078 error ("in C++98 %qD must be initialized by constructor, "
6082 else if (VECTOR_TYPE_P (type
) && TYPE_VECTOR_OPAQUE (type
))
6084 error ("opaque vector types cannot be initialized");
6085 init
= error_mark_node
;
6089 init
= reshape_init (type
, init
, tf_warning_or_error
);
6090 flags
|= LOOKUP_NO_NARROWING
;
6093 else if (TREE_CODE (init
) == TREE_LIST
6094 && TREE_TYPE (init
) != unknown_type_node
6095 && !MAYBE_CLASS_TYPE_P (type
))
6097 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6099 /* We get here with code like `int a (2);' */
6100 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6101 tf_warning_or_error
);
6104 /* If DECL has an array type without a specific bound, deduce the
6105 array size from the initializer. */
6106 maybe_deduce_size_from_array_init (decl
, init
);
6107 type
= TREE_TYPE (decl
);
6108 if (type
== error_mark_node
)
6111 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
6112 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
6113 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
6114 && CP_AGGREGATE_TYPE_P (type
)
6115 && (CLASS_TYPE_P (type
)
6116 || !TYPE_NEEDS_CONSTRUCTING (type
)
6117 || type_has_extended_temps (type
))))
6119 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
6121 /* A constructor call is a non-trivial initializer even if
6122 it isn't explicitly written. */
6123 if (TREE_SIDE_EFFECTS (init_code
))
6124 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
6126 /* If this is a constexpr initializer, expand_default_init will
6127 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6128 case, pull the initializer back out and pass it down into
6129 store_init_value. */
6130 while (TREE_CODE (init_code
) == EXPR_STMT
6131 || TREE_CODE (init_code
) == CONVERT_EXPR
)
6132 init_code
= TREE_OPERAND (init_code
, 0);
6133 if (TREE_CODE (init_code
) == INIT_EXPR
)
6135 init
= TREE_OPERAND (init_code
, 1);
6136 init_code
= NULL_TREE
;
6137 /* Don't call digest_init; it's unnecessary and will complain
6138 about aggregate initialization of non-aggregate classes. */
6139 flags
|= LOOKUP_ALREADY_DIGESTED
;
6141 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
6143 /* Declared constexpr, but no suitable initializer; massage
6144 init appropriately so we can pass it into store_init_value
6146 if (CLASS_TYPE_P (type
)
6147 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
6149 init
= build_functional_cast (type
, init
, tf_none
);
6150 if (TREE_CODE (init
) == TARGET_EXPR
)
6151 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
6153 init_code
= NULL_TREE
;
6159 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6161 /* In aggregate initialization of a variable, each element
6162 initialization is a full-expression because there is no
6163 enclosing expression. */
6164 gcc_assert (stmts_are_full_exprs_p ());
6166 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6168 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6169 && DECL_INITIAL (decl
)
6170 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6171 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6172 warning (0, "array %qD initialized by parenthesized string literal %qE",
6173 decl
, DECL_INITIAL (decl
));
6179 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6180 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6181 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6182 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6185 check_for_uninitialized_const_var (decl
);
6188 if (init
&& init
!= error_mark_node
)
6189 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6193 /* We might have set these in cp_finish_decl. */
6194 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6195 TREE_CONSTANT (decl
) = false;
6198 if (init_code
&& DECL_IN_AGGR_P (decl
))
6200 static int explained
= 0;
6202 if (cxx_dialect
< cxx11
)
6203 error ("initializer invalid for static member with constructor");
6205 error ("non-constant in-class initialization invalid for static "
6206 "member %qD", decl
);
6209 inform (input_location
,
6210 "(an out of class initialization is required)");
6219 /* If DECL is not a local variable, give it RTL. */
6222 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6224 int toplev
= toplevel_bindings_p ();
6227 /* Set the DECL_ASSEMBLER_NAME for the object. */
6230 /* The `register' keyword, when used together with an
6231 asm-specification, indicates that the variable should be
6232 placed in a particular register. */
6233 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6235 set_user_assembler_name (decl
, asmspec
);
6236 DECL_HARD_REGISTER (decl
) = 1;
6240 if (TREE_CODE (decl
) == FUNCTION_DECL
6241 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6242 set_builtin_user_assembler_name (decl
, asmspec
);
6243 set_user_assembler_name (decl
, asmspec
);
6247 /* Handle non-variables up front. */
6250 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6254 /* If we see a class member here, it should be a static data
6256 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6258 gcc_assert (TREE_STATIC (decl
));
6259 /* An in-class declaration of a static data member should be
6260 external; it is only a declaration, and not a definition. */
6261 if (init
== NULL_TREE
)
6262 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6265 /* We don't create any RTL for local variables. */
6266 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6269 /* We defer emission of local statics until the corresponding
6270 DECL_EXPR is expanded. But with constexpr its function might never
6271 be expanded, so go ahead and tell cgraph about the variable now. */
6272 defer_p
= ((DECL_FUNCTION_SCOPE_P (decl
)
6273 && !DECL_DECLARED_CONSTEXPR_P (DECL_CONTEXT (decl
)))
6274 || DECL_VIRTUAL_P (decl
));
6276 /* Defer template instantiations. */
6277 if (DECL_LANG_SPECIFIC (decl
)
6278 && DECL_IMPLICIT_INSTANTIATION (decl
))
6281 /* If we're not deferring, go ahead and assemble the variable. */
6283 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6286 /* walk_tree helper for wrap_temporary_cleanups, below. */
6289 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6291 /* Stop at types or full-expression boundaries. */
6292 if (TYPE_P (*stmt_p
)
6293 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6299 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6301 tree guard
= (tree
)data
;
6302 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6304 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6305 /* Tell honor_protect_cleanup_actions to handle this as a separate
6307 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6309 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6315 /* We're initializing a local variable which has a cleanup GUARD. If there
6316 are any temporaries used in the initializer INIT of this variable, we
6317 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6318 variable will be cleaned up properly if one of them throws.
6320 Unfortunately, there's no way to express this properly in terms of
6321 nesting, as the regions for the temporaries overlap the region for the
6322 variable itself; if there are two temporaries, the variable needs to be
6323 the first thing destroyed if either of them throws. However, we only
6324 want to run the variable's cleanup if it actually got constructed. So
6325 we need to guard the temporary cleanups with the variable's cleanup if
6326 they are run on the normal path, but not if they are run on the
6327 exceptional path. We implement this by telling
6328 honor_protect_cleanup_actions to strip the variable cleanup from the
6329 exceptional path. */
6332 wrap_temporary_cleanups (tree init
, tree guard
)
6334 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6337 /* Generate code to initialize DECL (a local variable). */
6340 initialize_local_var (tree decl
, tree init
)
6342 tree type
= TREE_TYPE (decl
);
6346 gcc_assert (VAR_P (decl
)
6347 || TREE_CODE (decl
) == RESULT_DECL
);
6348 gcc_assert (!TREE_STATIC (decl
));
6350 if (DECL_SIZE (decl
) == NULL_TREE
)
6352 /* If we used it already as memory, it must stay in memory. */
6353 DECL_INITIAL (decl
) = NULL_TREE
;
6354 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6358 if (type
== error_mark_node
)
6361 /* Compute and store the initial value. */
6362 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6363 if (TREE_USED (type
))
6364 DECL_READ_P (decl
) = 1;
6366 /* Generate a cleanup, if necessary. */
6367 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6369 /* Perform the initialization. */
6372 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6373 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6374 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6376 /* Stick simple initializers in DECL_INITIAL so that
6377 -Wno-init-self works (c++/34772). */
6378 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6379 DECL_INITIAL (decl
) = rinit
;
6381 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6385 warning_at (DECL_SOURCE_LOCATION (decl
),
6387 "reference %qD is initialized with itself", decl
);
6392 int saved_stmts_are_full_exprs_p
;
6394 /* If we're only initializing a single object, guard the
6395 destructors of any temporaries used in its initializer with
6396 its destructor. This isn't right for arrays because each
6397 element initialization is a full-expression. */
6398 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6399 wrap_temporary_cleanups (init
, cleanup
);
6401 gcc_assert (building_stmt_list_p ());
6402 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6403 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6404 finish_expr_stmt (init
);
6405 current_stmt_tree ()->stmts_are_full_exprs_p
=
6406 saved_stmts_are_full_exprs_p
;
6410 /* Set this to 0 so we can tell whether an aggregate which was
6411 initialized was ever used. Don't do this if it has a
6412 destructor, so we don't complain about the 'resource
6413 allocation is initialization' idiom. Now set
6414 attribute((unused)) on types so decls of that type will be
6415 marked used. (see TREE_USED, above.) */
6416 if (TYPE_NEEDS_CONSTRUCTING (type
)
6418 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6419 && DECL_NAME (decl
))
6420 TREE_USED (decl
) = 0;
6421 else if (already_used
)
6422 TREE_USED (decl
) = 1;
6425 finish_decl_cleanup (decl
, cleanup
);
6428 /* DECL is a VAR_DECL for a compiler-generated variable with static
6429 storage duration (like a virtual table) whose initializer is a
6430 compile-time constant. Initialize the variable and provide it to the
6434 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6437 gcc_assert (DECL_ARTIFICIAL (decl
));
6438 init
= build_constructor (TREE_TYPE (decl
), v
);
6439 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6440 DECL_INITIAL (decl
) = init
;
6441 DECL_INITIALIZED_P (decl
) = 1;
6442 determine_visibility (decl
);
6443 layout_var_decl (decl
);
6444 maybe_commonize_var (decl
);
6445 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6448 /* INIT is the initializer for a variable, as represented by the
6449 parser. Returns true iff INIT is type-dependent. */
6452 type_dependent_init_p (tree init
)
6454 if (TREE_CODE (init
) == TREE_LIST
)
6455 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6456 return any_type_dependent_elements_p (init
);
6457 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6458 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6460 vec
<constructor_elt
, va_gc
> *elts
;
6464 elts
= CONSTRUCTOR_ELTS (init
);
6465 nelts
= vec_safe_length (elts
);
6466 for (i
= 0; i
< nelts
; ++i
)
6467 if (type_dependent_init_p ((*elts
)[i
].value
))
6471 /* It must be a simple expression, e.g., int i = 3; */
6472 return type_dependent_expression_p (init
);
6477 /* INIT is the initializer for a variable, as represented by the
6478 parser. Returns true iff INIT is value-dependent. */
6481 value_dependent_init_p (tree init
)
6483 if (TREE_CODE (init
) == TREE_LIST
)
6484 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6485 return any_value_dependent_elements_p (init
);
6486 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6487 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6489 vec
<constructor_elt
, va_gc
> *elts
;
6493 elts
= CONSTRUCTOR_ELTS (init
);
6494 nelts
= vec_safe_length (elts
);
6495 for (i
= 0; i
< nelts
; ++i
)
6496 if (value_dependent_init_p ((*elts
)[i
].value
))
6500 /* It must be a simple expression, e.g., int i = 3; */
6501 return value_dependent_expression_p (init
);
6506 // Returns true if a DECL is VAR_DECL with the concept specifier.
6508 is_concept_var (tree decl
)
6510 return (VAR_P (decl
)
6511 // Not all variables have DECL_LANG_SPECIFIC.
6512 && DECL_LANG_SPECIFIC (decl
)
6513 && DECL_DECLARED_CONCEPT_P (decl
));
6516 /* A helper function to be called via walk_tree. If any label exists
6517 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6520 notice_forced_label_r (tree
*tp
, int *walk_subtrees
, void *)
6524 if (TREE_CODE (*tp
) == LABEL_DECL
)
6525 cfun
->has_forced_label_in_static
= 1;
6529 /* Finish processing of a declaration;
6530 install its line number and initial value.
6531 If the length of an array type is not known before,
6532 it must be determined now, from the initial value, or it is an error.
6534 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6535 true, then INIT is an integral constant expression.
6537 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6538 if the (init) syntax was used. */
6541 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6542 tree asmspec_tree
, int flags
)
6545 vec
<tree
, va_gc
> *cleanups
= NULL
;
6546 const char *asmspec
= NULL
;
6547 int was_readonly
= 0;
6548 bool var_definition_p
= false;
6551 if (decl
== error_mark_node
)
6556 error ("assignment (not initialization) in declaration");
6560 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6561 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6562 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6564 type
= TREE_TYPE (decl
);
6565 if (type
== error_mark_node
)
6568 /* If a name was specified, get the string. */
6569 if (at_namespace_scope_p ())
6570 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6571 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6572 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6574 if (current_class_type
6575 && CP_DECL_CONTEXT (decl
) == current_class_type
6576 && TYPE_BEING_DEFINED (current_class_type
)
6577 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6578 && (DECL_INITIAL (decl
) || init
))
6579 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6581 if (TREE_CODE (decl
) != FUNCTION_DECL
6582 && (auto_node
= type_uses_auto (type
)))
6585 if (init
== NULL_TREE
)
6587 if (DECL_LANG_SPECIFIC (decl
)
6588 && DECL_TEMPLATE_INSTANTIATION (decl
)
6589 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6591 /* init is null because we're deferring instantiating the
6592 initializer until we need it. Well, we need it now. */
6593 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6597 error ("declaration of %q#D has no initializer", decl
);
6598 TREE_TYPE (decl
) = error_mark_node
;
6602 if (TREE_CODE (d_init
) == TREE_LIST
)
6603 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6604 tf_warning_or_error
);
6605 d_init
= resolve_nondeduced_context (d_init
, tf_warning_or_error
);
6606 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6608 tf_warning_or_error
,
6610 if (type
== error_mark_node
)
6612 if (TREE_CODE (type
) == FUNCTION_TYPE
)
6614 error ("initializer for %<decltype(auto) %D%> has function type "
6615 "(did you forget the %<()%> ?)", decl
);
6616 TREE_TYPE (decl
) = error_mark_node
;
6619 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6622 if (!ensure_literal_type_for_constexpr_object (decl
))
6623 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6626 && DECL_CLASS_SCOPE_P (decl
)
6627 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6628 check_static_variable_definition (decl
, type
);
6630 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6633 if (init
== ridpointers
[(int)RID_DELETE
])
6635 /* FIXME check this is 1st decl. */
6636 DECL_DELETED_FN (decl
) = 1;
6637 DECL_DECLARED_INLINE_P (decl
) = 1;
6638 DECL_INITIAL (decl
) = error_mark_node
;
6639 FOR_EACH_CLONE (clone
, decl
)
6641 DECL_DELETED_FN (clone
) = 1;
6642 DECL_DECLARED_INLINE_P (clone
) = 1;
6643 DECL_INITIAL (clone
) = error_mark_node
;
6647 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6649 if (defaultable_fn_check (decl
))
6650 DECL_DEFAULTED_FN (decl
) = 1;
6652 DECL_INITIAL (decl
) = NULL_TREE
;
6656 if (init
&& VAR_P (decl
))
6658 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6659 /* If DECL is a reference, then we want to know whether init is a
6660 reference constant; init_const_expr_p as passed tells us whether
6661 it's an rvalue constant. */
6662 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6663 init_const_expr_p
= potential_constant_expression (init
);
6664 if (init_const_expr_p
)
6666 /* Set these flags now for templates. We'll update the flags in
6667 store_init_value for instantiations. */
6668 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6669 if (decl_maybe_constant_var_p (decl
))
6670 TREE_CONSTANT (decl
) = 1;
6674 if (processing_template_decl
)
6676 bool type_dependent_p
;
6678 /* Add this declaration to the statement-tree. */
6679 if (at_function_scope_p ())
6680 add_decl_expr (decl
);
6682 type_dependent_p
= dependent_type_p (type
);
6684 if (check_for_bare_parameter_packs (init
))
6687 DECL_INITIAL (decl
) = NULL_TREE
;
6690 /* Generally, initializers in templates are expanded when the
6691 template is instantiated. But, if DECL is a variable constant
6692 then it can be used in future constant expressions, so its value
6693 must be available. */
6695 if (!VAR_P (decl
) || type_dependent_p
)
6696 /* We can't do anything if the decl has dependent type. */;
6698 && init_const_expr_p
6699 && TREE_CODE (type
) != REFERENCE_TYPE
6700 && decl_maybe_constant_var_p (decl
)
6701 && !type_dependent_init_p (init
)
6702 && !value_dependent_init_p (init
))
6704 /* This variable seems to be a non-dependent constant, so process
6705 its initializer. If check_initializer returns non-null the
6706 initialization wasn't constant after all. */
6708 cleanups
= make_tree_vector ();
6709 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6710 if (init_code
== NULL_TREE
)
6712 release_tree_vector (cleanups
);
6714 else if (!init
&& is_concept_var (decl
))
6715 error ("variable concept has no initializer");
6716 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6718 /* Deduce array size even if the initializer is dependent. */
6719 maybe_deduce_size_from_array_init (decl
, init
);
6720 /* And complain about multiple initializers. */
6721 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6722 && !MAYBE_CLASS_TYPE_P (type
))
6723 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6724 tf_warning_or_error
);
6728 DECL_INITIAL (decl
) = init
;
6732 /* Just store non-static data member initializers for later. */
6733 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6734 DECL_INITIAL (decl
) = init
;
6736 /* Take care of TYPE_DECLs up front. */
6737 if (TREE_CODE (decl
) == TYPE_DECL
)
6739 if (type
!= error_mark_node
6740 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6742 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6743 warning (0, "shadowing previous type declaration of %q#D", decl
);
6744 set_identifier_type_value (DECL_NAME (decl
), decl
);
6747 /* If we have installed this as the canonical typedef for this
6748 type, and that type has not been defined yet, delay emitting
6749 the debug information for it, as we will emit it later. */
6750 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6751 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6752 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6754 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6759 /* A reference will be modified here, as it is initialized. */
6760 if (! DECL_EXTERNAL (decl
)
6761 && TREE_READONLY (decl
)
6762 && TREE_CODE (type
) == REFERENCE_TYPE
)
6765 TREE_READONLY (decl
) = 0;
6770 /* If this is a local variable that will need a mangled name,
6771 register it now. We must do this before processing the
6772 initializer for the variable, since the initialization might
6773 require a guard variable, and since the mangled name of the
6774 guard variable will depend on the mangled name of this
6776 if (DECL_FUNCTION_SCOPE_P (decl
)
6777 && TREE_STATIC (decl
)
6778 && !DECL_ARTIFICIAL (decl
))
6780 push_local_name (decl
);
6781 /* Normally has_forced_label_in_static is set during GIMPLE
6782 lowering, but [cd]tors are never actually compiled directly.
6783 We need to set this early so we can deal with the label
6784 address extension. */
6785 if ((DECL_CONSTRUCTOR_P (current_function_decl
)
6786 || DECL_DESTRUCTOR_P (current_function_decl
))
6789 walk_tree (&init
, notice_forced_label_r
, NULL
, NULL
);
6790 add_local_decl (cfun
, decl
);
6792 /* And make sure it's in the symbol table for
6793 c_parse_final_cleanups to find. */
6794 varpool_node::get_create (decl
);
6797 /* Convert the initializer to the type of DECL, if we have not
6798 already initialized DECL. */
6799 if (!DECL_INITIALIZED_P (decl
)
6800 /* If !DECL_EXTERNAL then DECL is being defined. In the
6801 case of a static data member initialized inside the
6802 class-specifier, there can be an initializer even if DECL
6803 is *not* defined. */
6804 && (!DECL_EXTERNAL (decl
) || init
))
6806 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6809 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6810 /* Allow libjava/prims.cc define primitive classes. */
6811 if (init
!= NULL_TREE
6812 || jclass
== NULL_TREE
6813 || TREE_CODE (jclass
) != TYPE_DECL
6814 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6815 || !same_type_ignoring_top_level_qualifiers_p
6816 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6817 error ("Java object %qD not allocated with %<new%>", decl
);
6820 cleanups
= make_tree_vector ();
6821 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6827 The memory occupied by any object of static storage
6828 duration is zero-initialized at program startup before
6829 any other initialization takes place.
6831 We cannot create an appropriate initializer until after
6832 the type of DECL is finalized. If DECL_INITIAL is set,
6833 then the DECL is statically initialized, and any
6834 necessary zero-initialization has already been performed. */
6835 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6836 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6837 /*nelts=*/NULL_TREE
,
6838 /*static_storage_p=*/true);
6839 /* Remember that the initialization for this variable has
6841 DECL_INITIALIZED_P (decl
) = 1;
6842 /* This declaration is the definition of this variable,
6843 unless we are initializing a static data member within
6844 the class specifier. */
6845 if (!DECL_EXTERNAL (decl
))
6846 var_definition_p
= true;
6848 /* If the variable has an array type, lay out the type, even if
6849 there is no initializer. It is valid to index through the
6850 array, and we must get TYPE_ALIGN set correctly on the array
6852 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6855 if (TREE_STATIC (decl
)
6856 && !at_function_scope_p ()
6857 && current_function_decl
== NULL
)
6858 /* So decl is a global variable or a static member of a
6859 non local class. Record the types it uses
6860 so that we can decide later to emit debug info for them. */
6861 record_types_used_by_current_var_decl (decl
);
6863 else if (TREE_CODE (decl
) == FIELD_DECL
6864 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6865 error ("non-static data member %qD has Java class type", decl
);
6867 /* Add this declaration to the statement-tree. This needs to happen
6868 after the call to check_initializer so that the DECL_EXPR for a
6869 reference temp is added before the DECL_EXPR for the reference itself. */
6870 if (DECL_FUNCTION_SCOPE_P (decl
))
6872 /* If we're building a variable sized type, and we might be
6873 reachable other than via the top of the current binding
6874 level, then create a new BIND_EXPR so that we deallocate
6875 the object at the right time. */
6878 && !TREE_CONSTANT (DECL_SIZE (decl
))
6879 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6882 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6883 TREE_SIDE_EFFECTS (bind
) = 1;
6885 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6887 add_decl_expr (decl
);
6890 /* Let the middle end know about variables and functions -- but not
6891 static data members in uninstantiated class templates. */
6892 if (VAR_OR_FUNCTION_DECL_P (decl
))
6896 layout_var_decl (decl
);
6897 maybe_commonize_var (decl
);
6900 /* This needs to happen after the linkage is set. */
6901 determine_visibility (decl
);
6903 if (var_definition_p
&& TREE_STATIC (decl
))
6905 /* If a TREE_READONLY variable needs initialization
6906 at runtime, it is no longer readonly and we need to
6907 avoid MEM_READONLY_P being set on RTL created for it. */
6910 if (TREE_READONLY (decl
))
6911 TREE_READONLY (decl
) = 0;
6914 else if (was_readonly
)
6915 TREE_READONLY (decl
) = 1;
6917 /* Likewise if it needs destruction. */
6918 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6919 TREE_READONLY (decl
) = 0;
6922 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6924 /* Check for abstractness of the type. Notice that there is no
6925 need to strip array types here since the check for those types
6926 is already done within create_array_type_for_decl. */
6927 abstract_virtuals_error (decl
, type
);
6929 if (TREE_TYPE (decl
) == error_mark_node
)
6930 /* No initialization required. */
6932 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6936 if (init
== ridpointers
[(int)RID_DEFAULT
])
6938 /* An out-of-class default definition is defined at
6939 the point where it is explicitly defaulted. */
6940 if (DECL_DELETED_FN (decl
))
6941 maybe_explain_implicit_delete (decl
);
6942 else if (DECL_INITIAL (decl
) == error_mark_node
)
6943 synthesize_method (decl
);
6946 error ("function %q#D is initialized like a variable", decl
);
6948 /* else no initialization required. */
6950 else if (DECL_EXTERNAL (decl
)
6951 && ! (DECL_LANG_SPECIFIC (decl
)
6952 && DECL_NOT_REALLY_EXTERN (decl
)))
6955 DECL_INITIAL (decl
) = init
;
6957 /* A variable definition. */
6958 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6959 /* Initialize the local variable. */
6960 initialize_local_var (decl
, init
);
6962 /* If a variable is defined, and then a subsequent
6963 definition with external linkage is encountered, we will
6964 get here twice for the same variable. We want to avoid
6965 calling expand_static_init more than once. For variables
6966 that are not static data members, we can call
6967 expand_static_init only when we actually process the
6968 initializer. It is not legal to redeclare a static data
6969 member, so this issue does not arise in that case. */
6970 else if (var_definition_p
&& TREE_STATIC (decl
))
6971 expand_static_init (decl
, init
);
6974 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6975 reference, insert it in the statement-tree now. */
6979 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6980 push_cleanup (decl
, t
, false);
6981 release_tree_vector (cleanups
);
6985 TREE_READONLY (decl
) = 1;
6987 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6990 /* Returns a declaration for a VAR_DECL as if:
6992 extern "C" TYPE NAME;
6994 had been seen. Used to create compiler-generated global
6998 declare_global_var (tree name
, tree type
)
7002 push_to_top_level ();
7003 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7004 TREE_PUBLIC (decl
) = 1;
7005 DECL_EXTERNAL (decl
) = 1;
7006 DECL_ARTIFICIAL (decl
) = 1;
7007 /* If the user has explicitly declared this variable (perhaps
7008 because the code we are compiling is part of a low-level runtime
7009 library), then it is possible that our declaration will be merged
7010 with theirs by pushdecl. */
7011 decl
= pushdecl (decl
);
7012 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
7013 pop_from_top_level ();
7018 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7019 if "__cxa_atexit" is not being used) corresponding to the function
7020 to be called when the program exits. */
7023 get_atexit_fn_ptr_type (void)
7027 if (!atexit_fn_ptr_type_node
)
7030 if (flag_use_cxa_atexit
7031 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
7032 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7033 arg_type
= ptr_type_node
;
7035 /* The parameter to "atexit" is "void (*)(void)". */
7036 arg_type
= NULL_TREE
;
7038 fn_type
= build_function_type_list (void_type_node
,
7039 arg_type
, NULL_TREE
);
7040 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
7043 return atexit_fn_ptr_type_node
;
7046 /* Returns a pointer to the `atexit' function. Note that if
7047 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7048 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7051 get_atexit_node (void)
7057 bool use_aeabi_atexit
;
7062 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
7064 /* The declaration for `__cxa_atexit' is:
7066 int __cxa_atexit (void (*)(void *), void *, void *)
7068 We build up the argument types and then the function type
7070 tree argtype0
, argtype1
, argtype2
;
7072 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
7073 /* First, build the pointer-to-function type for the first
7075 fn_ptr_type
= get_atexit_fn_ptr_type ();
7076 /* Then, build the rest of the argument types. */
7077 argtype2
= ptr_type_node
;
7078 if (use_aeabi_atexit
)
7080 argtype1
= fn_ptr_type
;
7081 argtype0
= ptr_type_node
;
7085 argtype1
= ptr_type_node
;
7086 argtype0
= fn_ptr_type
;
7088 /* And the final __cxa_atexit type. */
7089 fn_type
= build_function_type_list (integer_type_node
,
7090 argtype0
, argtype1
, argtype2
,
7092 if (use_aeabi_atexit
)
7093 name
= "__aeabi_atexit";
7095 name
= "__cxa_atexit";
7099 /* The declaration for `atexit' is:
7101 int atexit (void (*)());
7103 We build up the argument types and then the function type
7105 fn_ptr_type
= get_atexit_fn_ptr_type ();
7106 /* Build the final atexit type. */
7107 fn_type
= build_function_type_list (integer_type_node
,
7108 fn_ptr_type
, NULL_TREE
);
7112 /* Now, build the function declaration. */
7113 push_lang_context (lang_name_c
);
7114 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
7115 mark_used (atexit_fndecl
);
7116 pop_lang_context ();
7117 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
7122 /* Like get_atexit_node, but for thread-local cleanups. */
7125 get_thread_atexit_node (void)
7127 /* The declaration for `__cxa_thread_atexit' is:
7129 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7130 tree fn_type
= build_function_type_list (integer_type_node
,
7131 get_atexit_fn_ptr_type (),
7132 ptr_type_node
, ptr_type_node
,
7135 /* Now, build the function declaration. */
7136 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
7137 ECF_LEAF
| ECF_NOTHROW
);
7138 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
7141 /* Returns the __dso_handle VAR_DECL. */
7144 get_dso_handle_node (void)
7146 if (dso_handle_node
)
7147 return dso_handle_node
;
7149 /* Declare the variable. */
7150 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
7153 #ifdef HAVE_GAS_HIDDEN
7154 if (dso_handle_node
!= error_mark_node
)
7156 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
7157 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
7161 return dso_handle_node
;
7164 /* Begin a new function with internal linkage whose job will be simply
7165 to destroy some particular variable. */
7167 static GTY(()) int start_cleanup_cnt
;
7170 start_cleanup_fn (void)
7175 bool use_cxa_atexit
= flag_use_cxa_atexit
7176 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
7178 push_to_top_level ();
7180 /* No need to mangle this. */
7181 push_lang_context (lang_name_c
);
7183 /* Build the name of the function. */
7184 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
7185 /* Build the function declaration. */
7186 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
7187 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
7188 /* It's a function with internal linkage, generated by the
7190 TREE_PUBLIC (fndecl
) = 0;
7191 DECL_ARTIFICIAL (fndecl
) = 1;
7192 /* Make the function `inline' so that it is only emitted if it is
7193 actually needed. It is unlikely that it will be inlined, since
7194 it is only called via a function pointer, but we avoid unnecessary
7195 emissions this way. */
7196 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7197 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7198 /* Build the parameter. */
7203 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7204 DECL_CONTEXT (parmdecl
) = fndecl
;
7205 TREE_USED (parmdecl
) = 1;
7206 DECL_READ_P (parmdecl
) = 1;
7207 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7211 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7213 pop_lang_context ();
7215 return current_function_decl
;
7218 /* Finish the cleanup function begun by start_cleanup_fn. */
7221 end_cleanup_fn (void)
7223 expand_or_defer_fn (finish_function (0));
7225 pop_from_top_level ();
7228 /* Generate code to handle the destruction of DECL, an object with
7229 static storage duration. */
7232 register_dtor_fn (tree decl
)
7239 bool ob_parm
, dso_parm
, use_dtor
;
7240 tree arg0
, arg1
, arg2
;
7243 type
= TREE_TYPE (decl
);
7244 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7247 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7248 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7249 destructor to "__cxa_atexit"; we don't have to build a temporary
7250 function to do the cleanup. */
7251 dso_parm
= (flag_use_cxa_atexit
7252 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7253 ob_parm
= (CP_DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7254 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7259 /* Find the destructor. */
7260 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7261 gcc_assert (idx
>= 0);
7262 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7263 /* Make sure it is accessible. */
7264 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7265 tf_warning_or_error
);
7269 /* Call build_cleanup before we enter the anonymous function so
7270 that any access checks will be done relative to the current
7271 scope, rather than the scope of the anonymous function. */
7272 build_cleanup (decl
);
7274 /* Now start the function. */
7275 cleanup
= start_cleanup_fn ();
7277 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7278 to the original function, rather than the anonymous one. That
7279 will make the back end think that nested functions are in use,
7280 which causes confusion. */
7281 push_deferring_access_checks (dk_no_check
);
7282 fcall
= build_cleanup (decl
);
7283 pop_deferring_access_checks ();
7285 /* Create the body of the anonymous function. */
7286 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7287 finish_expr_stmt (fcall
);
7288 finish_compound_stmt (compound_stmt
);
7292 /* Call atexit with the cleanup function. */
7293 mark_used (cleanup
);
7294 cleanup
= build_address (cleanup
);
7296 if (CP_DECL_THREAD_LOCAL_P (decl
))
7297 atex_node
= get_thread_atexit_node ();
7299 atex_node
= get_atexit_node ();
7303 /* We must convert CLEANUP to the type that "__cxa_atexit"
7305 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7306 /* "__cxa_atexit" will pass the address of DECL to the
7307 cleanup function. */
7309 addr
= build_address (decl
);
7310 /* The declared type of the parameter to "__cxa_atexit" is
7311 "void *". For plain "T*", we could just let the
7312 machinery in cp_build_function_call convert it -- but if the
7313 type is "cv-qualified T *", then we need to convert it
7314 before passing it in, to avoid spurious errors. */
7315 addr
= build_nop (ptr_type_node
, addr
);
7318 /* Since the cleanup functions we build ignore the address
7319 they're given, there's no reason to pass the actual address
7320 in, and, in general, it's cheaper to pass NULL than any
7322 addr
= null_pointer_node
;
7325 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7326 tf_warning_or_error
);
7328 /* Just pass NULL to the dso handle parm if we don't actually
7329 have a DSO handle on this target. */
7330 arg2
= null_pointer_node
;
7336 if (!CP_DECL_THREAD_LOCAL_P (decl
)
7337 && targetm
.cxx
.use_aeabi_atexit ())
7353 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7354 arg0
, arg1
, arg2
, NULL_TREE
);
7357 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7358 is its initializer. Generate code to handle the construction
7359 and destruction of DECL. */
7362 expand_static_init (tree decl
, tree init
)
7364 gcc_assert (VAR_P (decl
));
7365 gcc_assert (TREE_STATIC (decl
));
7367 /* Some variables require no dynamic initialization. */
7368 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7370 /* Make sure the destructor is callable. */
7371 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7376 if (CP_DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7377 && !DECL_FUNCTION_SCOPE_P (decl
))
7380 error ("non-local variable %qD declared %<__thread%> "
7381 "needs dynamic initialization", decl
);
7383 error ("non-local variable %qD declared %<__thread%> "
7384 "has a non-trivial destructor", decl
);
7385 static bool informed
;
7388 inform (DECL_SOURCE_LOCATION (decl
),
7389 "C++11 %<thread_local%> allows dynamic initialization "
7396 if (DECL_FUNCTION_SCOPE_P (decl
))
7398 /* Emit code to perform this initialization but once. */
7399 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7400 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7401 tree guard
, guard_addr
;
7403 /* We don't need thread-safety code for thread-local vars. */
7404 bool thread_guard
= (flag_threadsafe_statics
7405 && !CP_DECL_THREAD_LOCAL_P (decl
));
7407 /* Emit code to perform this initialization but once. This code
7410 static <type> guard;
7411 if (!__atomic_load (guard.first_byte)) {
7412 if (__cxa_guard_acquire (&guard)) {
7415 // Do initialization.
7416 flag = true; __cxa_guard_release (&guard);
7417 // Register variable for destruction at end of program.
7419 if (!flag) __cxa_guard_abort (&guard);
7423 Note that the `flag' variable is only set to 1 *after* the
7424 initialization is complete. This ensures that an exception,
7425 thrown during the construction, will cause the variable to
7426 reinitialized when we pass through this code again, as per:
7430 If the initialization exits by throwing an exception, the
7431 initialization is not complete, so it will be tried again
7432 the next time control enters the declaration.
7434 This process should be thread-safe, too; multiple threads
7435 should not be able to initialize the variable more than
7438 /* Create the guard variable. */
7439 guard
= get_guard (decl
);
7441 /* Begin the conditional initialization. */
7442 if_stmt
= begin_if_stmt ();
7444 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7445 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7449 tree vfntype
= NULL_TREE
;
7450 tree acquire_name
, release_name
, abort_name
;
7451 tree acquire_fn
, release_fn
, abort_fn
;
7452 guard_addr
= build_address (guard
);
7454 acquire_name
= get_identifier ("__cxa_guard_acquire");
7455 release_name
= get_identifier ("__cxa_guard_release");
7456 abort_name
= get_identifier ("__cxa_guard_abort");
7457 acquire_fn
= identifier_global_value (acquire_name
);
7458 release_fn
= identifier_global_value (release_name
);
7459 abort_fn
= identifier_global_value (abort_name
);
7461 acquire_fn
= push_library_fn
7462 (acquire_name
, build_function_type_list (integer_type_node
,
7463 TREE_TYPE (guard_addr
),
7465 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7466 if (!release_fn
|| !abort_fn
)
7467 vfntype
= build_function_type_list (void_type_node
,
7468 TREE_TYPE (guard_addr
),
7471 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7472 ECF_NOTHROW
| ECF_LEAF
);
7474 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7475 ECF_NOTHROW
| ECF_LEAF
);
7477 inner_if_stmt
= begin_if_stmt ();
7478 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7481 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7482 begin
= get_target_expr (boolean_false_node
);
7483 flag
= TARGET_EXPR_SLOT (begin
);
7485 TARGET_EXPR_CLEANUP (begin
)
7486 = build3 (COND_EXPR
, void_type_node
, flag
,
7488 build_call_n (abort_fn
, 1, guard_addr
));
7489 CLEANUP_EH_ONLY (begin
) = 1;
7491 /* Do the initialization itself. */
7492 init
= add_stmt_to_compound (begin
, init
);
7493 init
= add_stmt_to_compound
7494 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7495 init
= add_stmt_to_compound
7496 (init
, build_call_n (release_fn
, 1, guard_addr
));
7499 init
= add_stmt_to_compound (init
, set_guard (guard
));
7501 /* Use atexit to register a function for destroying this static
7503 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7505 finish_expr_stmt (init
);
7509 finish_compound_stmt (inner_then_clause
);
7510 finish_then_clause (inner_if_stmt
);
7511 finish_if_stmt (inner_if_stmt
);
7514 finish_compound_stmt (then_clause
);
7515 finish_then_clause (if_stmt
);
7516 finish_if_stmt (if_stmt
);
7518 else if (CP_DECL_THREAD_LOCAL_P (decl
))
7519 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7521 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7525 /* Make TYPE a complete type based on INITIAL_VALUE.
7526 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7527 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7528 3 if the initializer list is empty (in pedantic mode). */
7531 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7534 tree type
, elt_type
;
7536 /* Don't get confused by a CONSTRUCTOR for some other type. */
7537 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7538 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
)
7539 && TREE_CODE (TREE_TYPE (initial_value
)) != ARRAY_TYPE
)
7544 unsigned HOST_WIDE_INT i
;
7547 /* An array of character type can be initialized from a
7548 brace-enclosed string constant.
7550 FIXME: this code is duplicated from reshape_init. Probably
7551 we should just call reshape_init here? */
7552 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7553 && TREE_CODE (initial_value
) == CONSTRUCTOR
7554 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7556 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7557 tree value
= (*v
)[0].value
;
7559 if (TREE_CODE (value
) == STRING_CST
7560 && v
->length () == 1)
7561 initial_value
= value
;
7564 /* If any of the elements are parameter packs, we can't actually
7565 complete this type now because the array size is dependent. */
7566 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7568 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7571 if (PACK_EXPANSION_P (value
))
7577 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7579 /* We can create the array before the element type is complete, which
7580 means that we didn't have these two bits set in the original type
7581 either. In completing the type, we are expected to propagate these
7582 bits. See also complete_type which does the same thing for arrays
7585 if (TYPE_DOMAIN (type
))
7587 elt_type
= TREE_TYPE (type
);
7588 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7589 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7590 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7596 /* As above, but either give an error or reject zero-size arrays, depending
7600 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7601 bool do_default
, tsubst_flags_t complain
)
7604 bool sfinae
= !(complain
& tf_error
);
7605 /* In SFINAE context we can't be lenient about zero-size arrays. */
7608 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7614 /* Not an error. */;
7615 else if (failure
== 1)
7616 error ("initializer fails to determine size of %qT", *ptype
);
7617 else if (failure
== 2)
7620 error ("array size missing in %qT", *ptype
);
7622 else if (failure
== 3)
7623 error ("zero-size array %qT", *ptype
);
7624 *ptype
= error_mark_node
;
7629 /* Return zero if something is declared to be a member of type
7630 CTYPE when in the context of CUR_TYPE. STRING is the error
7631 message to print in that case. Otherwise, quietly return 1. */
7634 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7636 if (ctype
&& ctype
!= cur_type
)
7638 if (flags
== DTOR_FLAG
)
7639 error ("destructor for alien class %qT cannot be a member", ctype
);
7641 error ("constructor for alien class %qT cannot be a member", ctype
);
7647 /* Subroutine of `grokdeclarator'. */
7649 /* Generate errors possibly applicable for a given set of specifiers.
7650 This is for ARM $7.1.2. */
7653 bad_specifiers (tree object
,
7654 enum bad_spec_place type
,
7665 error ("%qD declared as a %<virtual%> variable", object
);
7667 error ("%qD declared as an %<inline%> variable", object
);
7669 error ("%<const%> and %<volatile%> function specifiers on "
7670 "%qD invalid in variable declaration", object
);
7674 error ("%qD declared as a %<virtual%> parameter", object
);
7676 error ("%qD declared as an %<inline%> parameter", object
);
7678 error ("%<const%> and %<volatile%> function specifiers on "
7679 "%qD invalid in parameter declaration", object
);
7683 error ("%qD declared as a %<virtual%> type", object
);
7685 error ("%qD declared as an %<inline%> type", object
);
7687 error ("%<const%> and %<volatile%> function specifiers on "
7688 "%qD invalid in type declaration", object
);
7692 error ("%qD declared as a %<virtual%> field", object
);
7694 error ("%qD declared as an %<inline%> field", object
);
7696 error ("%<const%> and %<volatile%> function specifiers on "
7697 "%qD invalid in field declaration", object
);
7703 error ("%q+D declared as a friend", object
);
7705 && (TREE_CODE (object
) == TYPE_DECL
7706 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7707 && !TYPE_REFFN_P (TREE_TYPE (object
))
7708 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7709 error ("%q+D declared with an exception specification", object
);
7712 /* DECL is a member function or static data member and is presently
7713 being defined. Check that the definition is taking place in a
7717 check_class_member_definition_namespace (tree decl
)
7719 /* These checks only apply to member functions and static data
7721 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7722 /* We check for problems with specializations in pt.c in
7723 check_specialization_namespace, where we can issue better
7725 if (processing_specialization
)
7727 /* There are no restrictions on the placement of
7728 explicit instantiations. */
7729 if (processing_explicit_instantiation
)
7733 A member function definition that appears outside of the
7734 class definition shall appear in a namespace scope enclosing
7735 the class definition.
7739 The definition for a static data member shall appear in a
7740 namespace scope enclosing the member's class definition. */
7741 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7742 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7743 decl
, DECL_CONTEXT (decl
));
7746 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7747 METHOD_TYPE for a non-static member function; QUALS are the
7748 cv-qualifiers that apply to the function. */
7751 build_this_parm (tree type
, cp_cv_quals quals
)
7756 cp_cv_quals this_quals
;
7758 if (CLASS_TYPE_P (type
))
7761 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7762 this_type
= build_pointer_type (this_type
);
7765 this_type
= type_of_this_parm (type
);
7766 /* The `this' parameter is implicitly `const'; it cannot be
7768 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7769 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7770 parm
= build_artificial_parm (this_identifier
, qual_type
);
7771 cp_apply_type_quals_to_decl (this_quals
, parm
);
7775 /* DECL is a static member function. Complain if it was declared
7776 with function-cv-quals. */
7779 check_static_quals (tree decl
, cp_cv_quals quals
)
7781 if (quals
!= TYPE_UNQUALIFIED
)
7782 error ("static member function %q#D declared with type qualifiers",
7786 // Check that FN takes no arguments and returns bool.
7788 check_concept_fn (tree fn
)
7790 // A constraint is nullary.
7791 if (DECL_ARGUMENTS (fn
))
7792 error ("concept %q#D declared with function parameters", fn
);
7794 // The declared return type of the concept shall be bool, and
7795 // it shall not be deduced from it definition.
7796 tree type
= TREE_TYPE (TREE_TYPE (fn
));
7798 error ("concept %q#D declared with a deduced return type", fn
);
7799 else if (type
!= boolean_type_node
)
7800 error ("concept %q#D with non-%<bool%> return type %qT", fn
, type
);
7803 /* Helper function. Replace the temporary this parameter injected
7804 during cp_finish_omp_declare_simd with the real this parameter. */
7807 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7809 tree this_parm
= (tree
) data
;
7810 if (TREE_CODE (*tp
) == PARM_DECL
7811 && DECL_NAME (*tp
) == this_identifier
7812 && *tp
!= this_parm
)
7814 else if (TYPE_P (*tp
))
7819 /* CTYPE is class type, or null if non-class.
7820 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7822 DECLARATOR is the function's name.
7823 PARMS is a chain of PARM_DECLs for the function.
7824 VIRTUALP is truthvalue of whether the function is virtual or not.
7825 FLAGS are to be passed through to `grokclassfn'.
7826 QUALS are qualifiers indicating whether the function is `const'
7828 RAISES is a list of exceptions that this function can raise.
7829 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7830 not look, and -1 if we should not call `grokclassfn' at all.
7832 SFK is the kind of special function (if any) for the new function.
7834 Returns `NULL_TREE' if something goes wrong, after issuing
7835 applicable error messages. */
7838 grokfndecl (tree ctype
,
7842 tree orig_declarator
,
7845 enum overload_flags flags
,
7847 cp_ref_qualifier rqual
,
7854 special_function_kind sfk
,
7859 location_t location
)
7862 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7865 // Was the concept specifier present?
7866 bool concept_p
= inlinep
& 4;
7868 // Concept declarations must have a corresponding definition.
7869 if (concept_p
&& !funcdef_flag
)
7871 error ("concept %qD has no definition", declarator
);
7876 type
= build_ref_qualified_type (type
, rqual
);
7878 type
= build_exception_variant (type
, raises
);
7880 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7882 /* Set the constraints on the declaration. */
7885 tree tmpl_reqs
= NULL_TREE
;
7886 if (processing_template_decl
> template_class_depth (ctype
))
7887 tmpl_reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
7889 /* Adjust the required expression into a constraint. */
7891 decl_reqs
= make_predicate_constraint (decl_reqs
);
7893 tree ci
= build_constraints (tmpl_reqs
, decl_reqs
);
7894 set_constraints (decl
, ci
);
7897 /* If we have an explicit location, use it, otherwise use whatever
7898 build_lang_decl used (probably input_location). */
7899 if (location
!= UNKNOWN_LOCATION
)
7900 DECL_SOURCE_LOCATION (decl
) = location
;
7902 if (TREE_CODE (type
) == METHOD_TYPE
)
7905 parm
= build_this_parm (type
, quals
);
7906 DECL_CHAIN (parm
) = parms
;
7909 /* Allocate space to hold the vptr bit if needed. */
7910 SET_DECL_ALIGN (decl
, MINIMUM_METHOD_BOUNDARY
);
7912 DECL_ARGUMENTS (decl
) = parms
;
7913 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7914 DECL_CONTEXT (t
) = decl
;
7915 /* Propagate volatile out from type to decl. */
7916 if (TYPE_VOLATILE (type
))
7917 TREE_THIS_VOLATILE (decl
) = 1;
7919 /* Setup decl according to sfk. */
7922 case sfk_constructor
:
7923 case sfk_copy_constructor
:
7924 case sfk_move_constructor
:
7925 DECL_CONSTRUCTOR_P (decl
) = 1;
7927 case sfk_destructor
:
7928 DECL_DESTRUCTOR_P (decl
) = 1;
7935 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7939 ("defining explicit specialization %qD in friend declaration",
7943 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7944 tree args
= TREE_OPERAND (orig_declarator
, 1);
7946 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7948 /* Something like `template <class T> friend void f<T>()'. */
7949 error ("invalid use of template-id %qD in declaration "
7950 "of primary template",
7956 /* A friend declaration of the form friend void f<>(). Record
7957 the information in the TEMPLATE_ID_EXPR. */
7958 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7960 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7961 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7963 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7964 if (TREE_PURPOSE (t
)
7965 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7967 error ("default arguments are not allowed in declaration "
7968 "of friend template specialization %qD",
7975 error ("%<inline%> is not allowed in declaration of friend "
7976 "template specialization %qD",
7983 /* If this decl has namespace scope, set that up. */
7985 set_decl_namespace (decl
, in_namespace
, friendp
);
7987 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7989 /* `main' and builtins have implicit 'C' linkage. */
7990 if ((MAIN_NAME_P (declarator
)
7991 || (IDENTIFIER_LENGTH (declarator
) > 10
7992 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7993 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7994 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7995 || (targetcm
.cxx_implicit_extern_c
7996 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7997 && current_lang_name
== lang_name_cplusplus
7998 && ctype
== NULL_TREE
7999 && DECL_FILE_SCOPE_P (decl
))
8000 SET_DECL_LANGUAGE (decl
, lang_c
);
8002 /* Should probably propagate const out from type to decl I bet (mrs). */
8005 DECL_STATIC_FUNCTION_P (decl
) = 1;
8006 DECL_CONTEXT (decl
) = ctype
;
8010 DECL_DELETED_FN (decl
) = 1;
8014 DECL_CONTEXT (decl
) = ctype
;
8016 check_class_member_definition_namespace (decl
);
8019 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
8021 if (PROCESSING_REAL_TEMPLATE_DECL_P())
8022 error ("cannot declare %<::main%> to be a template");
8024 error ("cannot declare %<::main%> to be inline");
8026 error ("cannot declare %<::main%> to be constexpr");
8028 error ("cannot declare %<::main%> to be static");
8033 /* Members of anonymous types and local classes have no linkage; make
8034 them internal. If a typedef is made later, this will be changed. */
8035 if (ctype
&& (!TREE_PUBLIC (TYPE_MAIN_DECL (ctype
))
8036 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
8039 if (publicp
&& cxx_dialect
== cxx98
)
8041 /* [basic.link]: A name with no linkage (notably, the name of a class
8042 or enumeration declared in a local scope) shall not be used to
8043 declare an entity with linkage.
8045 DR 757 relaxes this restriction for C++0x. */
8046 no_linkage_error (decl
);
8049 TREE_PUBLIC (decl
) = publicp
;
8052 DECL_INTERFACE_KNOWN (decl
) = 1;
8053 DECL_NOT_REALLY_EXTERN (decl
) = 1;
8056 /* If the declaration was declared inline, mark it as such. */
8059 DECL_DECLARED_INLINE_P (decl
) = 1;
8061 DECL_COMDAT (decl
) = 1;
8064 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
8066 // If the concept declaration specifier was found, check
8067 // that the declaration satisfies the necessary requirements.
8070 DECL_DECLARED_CONCEPT_P (decl
) = true;
8071 check_concept_fn (decl
);
8074 DECL_EXTERNAL (decl
) = 1;
8075 if (TREE_CODE (type
) == FUNCTION_TYPE
)
8078 TREE_TYPE (decl
) = apply_memfn_quals (TREE_TYPE (decl
),
8085 ? G_("static member function %qD cannot have cv-qualifier")
8086 : G_("non-member function %qD cannot have cv-qualifier"),
8088 quals
= TYPE_UNQUALIFIED
;
8094 ? G_("static member function %qD cannot have ref-qualifier")
8095 : G_("non-member function %qD cannot have ref-qualifier"),
8097 rqual
= REF_QUAL_NONE
;
8101 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
8102 && !grok_op_properties (decl
, /*complain=*/true))
8104 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
8106 bool long_long_unsigned_p
;
8108 const char *suffix
= NULL
;
8109 /* [over.literal]/6: Literal operators shall not have C linkage. */
8110 if (DECL_LANGUAGE (decl
) == lang_c
)
8112 error ("literal operator with C linkage");
8116 if (DECL_NAMESPACE_SCOPE_P (decl
))
8118 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
8121 error ("%qD has invalid argument list", decl
);
8125 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
8126 if (long_long_unsigned_p
)
8128 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
8129 warning (0, "integer suffix %<%s%>"
8130 " shadowed by implementation", suffix
);
8132 else if (long_double_p
)
8134 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
8135 warning (0, "floating point suffix %<%s%>"
8136 " shadowed by implementation", suffix
);
8141 error ("%qD must be a non-member function", decl
);
8147 /* Make the init_value nonzero so pushdecl knows this is not
8148 tentative. error_mark_node is replaced later with the BLOCK. */
8149 DECL_INITIAL (decl
) = error_mark_node
;
8151 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
8152 TREE_NOTHROW (decl
) = 1;
8154 if (flag_openmp
|| flag_openmp_simd
|| flag_cilkplus
)
8156 /* Adjust "omp declare simd" attributes. */
8157 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
8161 for (attr
= ods
; attr
;
8162 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
8164 if (TREE_CODE (type
) == METHOD_TYPE
)
8165 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
8166 DECL_ARGUMENTS (decl
), NULL
);
8167 if (TREE_VALUE (attr
) != NULL_TREE
)
8169 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
8170 cl
= c_omp_declare_simd_clauses_to_numbers
8171 (DECL_ARGUMENTS (decl
), cl
);
8173 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
8175 TREE_VALUE (attr
) = NULL_TREE
;
8181 /* Caller will do the rest of this. */
8185 if (ctype
!= NULL_TREE
)
8186 grokclassfn (ctype
, decl
, flags
);
8189 if (cxx_dialect
>= cxx11
8190 && DECL_DESTRUCTOR_P (decl
)
8191 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
8192 && !processing_template_decl
)
8193 deduce_noexcept_on_destructor (decl
);
8195 decl
= check_explicit_specialization (orig_declarator
, decl
,
8198 4 * (friendp
!= 0) +
8200 if (decl
== error_mark_node
)
8203 if (DECL_STATIC_FUNCTION_P (decl
))
8204 check_static_quals (decl
, quals
);
8208 cplus_decl_attributes (&decl
, *attrlist
, 0);
8209 *attrlist
= NULL_TREE
;
8212 /* Check main's type after attributes have been applied. */
8213 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
8215 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
8218 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8220 error ("%<::main%> must return %<int%>");
8221 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
8222 TREE_TYPE (decl
) = newtype
;
8225 check_main_parameter_types (decl
);
8228 if (ctype
!= NULL_TREE
8229 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
8232 tree old_decl
= check_classfn (ctype
, decl
,
8233 (processing_template_decl
8234 > template_class_depth (ctype
))
8235 ? current_template_parms
8238 if (old_decl
== error_mark_node
)
8246 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8247 /* Because grokfndecl is always supposed to return a
8248 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8249 here. We depend on our callers to figure out that its
8250 really a template that's being returned. */
8251 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8253 if (DECL_STATIC_FUNCTION_P (old_decl
)
8254 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8256 /* Remove the `this' parm added by grokclassfn. */
8257 revert_static_member_fn (decl
);
8258 check_static_quals (decl
, quals
);
8260 if (DECL_ARTIFICIAL (old_decl
))
8262 error ("definition of implicitly-declared %qD", old_decl
);
8265 else if (DECL_DEFAULTED_FN (old_decl
))
8267 error ("definition of explicitly-defaulted %q+D", decl
);
8268 error ("%q+#D explicitly defaulted here", old_decl
);
8272 /* Since we've smashed OLD_DECL to its
8273 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8274 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8275 decl
= DECL_TEMPLATE_RESULT (decl
);
8277 /* Attempt to merge the declarations. This can fail, in
8278 the case of some invalid specialization declarations. */
8279 pushed_scope
= push_scope (ctype
);
8280 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8282 pop_scope (pushed_scope
);
8285 error ("no %q#D member function declared in class %qT",
8289 if (ok
== error_mark_node
)
8295 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8298 if (ctype
== NULL_TREE
|| check
)
8302 DECL_VIRTUAL_P (decl
) = 1;
8307 /* decl is a FUNCTION_DECL.
8308 specifiers are the parsed virt-specifiers.
8310 Set flags to reflect the virt-specifiers.
8315 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8317 if (decl
== NULL_TREE
)
8319 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8320 DECL_OVERRIDE_P (decl
) = 1;
8321 if (specifiers
& VIRT_SPEC_FINAL
)
8322 DECL_FINAL_P (decl
) = 1;
8326 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8327 the linkage that DECL will receive in the object file. */
8330 set_linkage_for_static_data_member (tree decl
)
8332 /* A static data member always has static storage duration and
8333 external linkage. Note that static data members are forbidden in
8334 local classes -- the only situation in which a class has
8335 non-external linkage. */
8336 TREE_PUBLIC (decl
) = 1;
8337 TREE_STATIC (decl
) = 1;
8338 /* For non-template classes, static data members are always put
8339 out in exactly those files where they are defined, just as
8340 with ordinary namespace-scope variables. */
8341 if (!processing_template_decl
)
8342 DECL_INTERFACE_KNOWN (decl
) = 1;
8345 /* Create a VAR_DECL named NAME with the indicated TYPE.
8347 If SCOPE is non-NULL, it is the class type or namespace containing
8348 the variable. If SCOPE is NULL, the variable should is created in
8349 the innermost enclosing scope. */
8352 grokvardecl (tree type
,
8354 tree orig_declarator
,
8355 const cp_decl_specifier_seq
*declspecs
,
8362 tree explicit_scope
;
8364 gcc_assert (!name
|| identifier_p (name
));
8366 bool constp
= flags
&1;
8367 bool conceptp
= flags
&2;
8369 /* Compute the scope in which to place the variable, but remember
8370 whether or not that scope was explicitly specified by the user. */
8371 explicit_scope
= scope
;
8374 /* An explicit "extern" specifier indicates a namespace-scope
8376 if (declspecs
->storage_class
== sc_extern
)
8377 scope
= current_decl_namespace ();
8378 else if (!at_function_scope_p ())
8379 scope
= current_scope ();
8383 && (/* If the variable is a namespace-scope variable declared in a
8384 template, we need DECL_LANG_SPECIFIC. */
8385 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8386 /* Similarly for namespace-scope variables with language linkage
8388 || (TREE_CODE (scope
) == NAMESPACE_DECL
8389 && current_lang_name
!= lang_name_cplusplus
)
8390 /* Similarly for static data members. */
8392 /* Similarly for explicit specializations. */
8394 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8395 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8397 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8399 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8400 set_decl_namespace (decl
, explicit_scope
, 0);
8402 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8404 if (declspecs
->storage_class
== sc_extern
)
8406 DECL_THIS_EXTERN (decl
) = 1;
8407 DECL_EXTERNAL (decl
) = !initialized
;
8410 if (DECL_CLASS_SCOPE_P (decl
))
8412 set_linkage_for_static_data_member (decl
);
8413 /* This function is only called with out-of-class definitions. */
8414 DECL_EXTERNAL (decl
) = 0;
8415 check_class_member_definition_namespace (decl
);
8417 /* At top level, either `static' or no s.c. makes a definition
8418 (perhaps tentative), and absence of `static' makes it public. */
8419 else if (toplevel_bindings_p ())
8421 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8422 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8423 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8425 /* Not at top level, only `static' makes a static definition. */
8428 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8429 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8432 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8434 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8436 CP_DECL_THREAD_LOCAL_P (decl
) = true;
8437 if (!processing_template_decl
)
8438 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8440 if (declspecs
->gnu_thread_keyword_p
)
8441 SET_DECL_GNU_TLS_P (decl
);
8444 /* If the type of the decl has no linkage, make sure that we'll
8445 notice that in mark_used. */
8446 if (cxx_dialect
> cxx98
8447 && decl_linkage (decl
) != lk_none
8448 && DECL_LANG_SPECIFIC (decl
) == NULL
8449 && !DECL_EXTERN_C_P (decl
)
8450 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8451 retrofit_lang_decl (decl
);
8453 if (TREE_PUBLIC (decl
))
8455 /* [basic.link]: A name with no linkage (notably, the name of a class
8456 or enumeration declared in a local scope) shall not be used to
8457 declare an entity with linkage.
8459 DR 757 relaxes this restriction for C++0x. */
8460 if (cxx_dialect
< cxx11
)
8461 no_linkage_error (decl
);
8464 DECL_INTERFACE_KNOWN (decl
) = 1;
8466 if (DECL_NAME (decl
)
8467 && MAIN_NAME_P (DECL_NAME (decl
))
8468 && scope
== global_namespace
)
8469 error ("cannot declare %<::main%> to be a global variable");
8471 /* Check that the variable can be safely declared as a concept.
8472 Note that this also forbids explicit specializations. */
8475 if (!processing_template_decl
)
8477 error ("a non-template variable cannot be %<concept%>");
8481 DECL_DECLARED_CONCEPT_P (decl
) = true;
8482 if (!same_type_ignoring_top_level_qualifiers_p (type
, boolean_type_node
))
8483 error_at (declspecs
->locations
[ds_type_spec
],
8484 "concept must have type %<bool%>");
8486 else if (flag_concepts
8487 && processing_template_decl
> template_class_depth (scope
))
8489 tree reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
8490 tree ci
= build_constraints (reqs
, NULL_TREE
);
8491 set_constraints (decl
, ci
);
8494 // Handle explicit specializations and instantiations of variable templates.
8495 if (orig_declarator
)
8496 decl
= check_explicit_specialization (orig_declarator
, decl
,
8497 template_count
, conceptp
* 8);
8499 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8502 /* Create and return a canonical pointer to member function type, for
8503 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8506 build_ptrmemfunc_type (tree type
)
8511 if (type
== error_mark_node
)
8514 /* Make sure that we always have the unqualified pointer-to-member
8516 if (cp_cv_quals quals
= cp_type_quals (type
))
8518 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8519 return cp_build_qualified_type (unqual
, quals
);
8522 /* If a canonical type already exists for this type, use it. We use
8523 this method instead of type_hash_canon, because it only does a
8524 simple equality check on the list of field members. */
8526 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8529 t
= make_node (RECORD_TYPE
);
8531 /* Let the front end know this is a pointer to member function. */
8532 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8534 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8537 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8539 DECL_CHAIN (field
) = fields
;
8542 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8544 /* Zap out the name so that the back end will give us the debugging
8545 information for this anonymous RECORD_TYPE. */
8546 TYPE_NAME (t
) = NULL_TREE
;
8548 /* Cache this pointer-to-member type so that we can find it again
8550 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8552 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8553 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8554 else if (TYPE_CANONICAL (type
) != type
)
8555 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8560 /* Create and return a pointer to data member type. */
8563 build_ptrmem_type (tree class_type
, tree member_type
)
8565 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8567 cp_cv_quals quals
= type_memfn_quals (member_type
);
8568 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8569 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8570 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8574 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8575 return build_offset_type (class_type
, member_type
);
8579 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8580 Check to see that the definition is valid. Issue appropriate error
8581 messages. Return 1 if the definition is particularly bad, or 0
8585 check_static_variable_definition (tree decl
, tree type
)
8587 /* Can't check yet if we don't know the type. */
8588 if (dependent_type_p (type
))
8590 /* If DECL is declared constexpr, we'll do the appropriate checks
8591 in check_initializer. */
8592 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8594 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8596 if (!COMPLETE_TYPE_P (type
))
8597 error ("in-class initialization of static data member %q#D of "
8598 "incomplete type", decl
);
8599 else if (literal_type_p (type
))
8600 permerror (input_location
,
8601 "%<constexpr%> needed for in-class initialization of "
8602 "static data member %q#D of non-integral type", decl
);
8604 error ("in-class initialization of static data member %q#D of "
8605 "non-literal type", decl
);
8609 /* Motion 10 at San Diego: If a static const integral data member is
8610 initialized with an integral constant expression, the initializer
8611 may appear either in the declaration (within the class), or in
8612 the definition, but not both. If it appears in the class, the
8613 member is a member constant. The file-scope definition is always
8615 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8617 error ("invalid in-class initialization of static data member "
8618 "of non-integral type %qT",
8622 else if (!CP_TYPE_CONST_P (type
))
8623 error ("ISO C++ forbids in-class initialization of non-const "
8624 "static member %qD",
8626 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8627 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8628 "%qD of non-integral type %qT", decl
, type
);
8633 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8634 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8635 expressions out into temporary variables so that walk_tree doesn't
8636 step into them (c++/15764). */
8639 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8641 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8642 tree expr
= *expr_p
;
8643 if (TREE_CODE (expr
) == SAVE_EXPR
)
8645 tree op
= TREE_OPERAND (expr
, 0);
8646 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8647 if (TREE_SIDE_EFFECTS (op
))
8648 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8651 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8656 /* Entry point for the above. */
8659 stabilize_vla_size (tree size
)
8661 hash_set
<tree
> pset
;
8662 /* Break out any function calls into temporary variables. */
8663 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8666 /* Reduce a SIZEOF_EXPR to its value. */
8669 fold_sizeof_expr (tree t
)
8672 if (SIZEOF_EXPR_TYPE_P (t
))
8673 r
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (t
, 0)),
8674 SIZEOF_EXPR
, false);
8675 else if (TYPE_P (TREE_OPERAND (t
, 0)))
8676 r
= cxx_sizeof_or_alignof_type (TREE_OPERAND (t
, 0), SIZEOF_EXPR
,
8679 r
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (t
, 0), SIZEOF_EXPR
,
8681 if (r
== error_mark_node
)
8686 /* Given the SIZE (i.e., number of elements) in an array, compute
8687 an appropriate index type for the array. If non-NULL, NAME is
8688 the name of the entity being declared. */
8691 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8696 if (error_operand_p (size
))
8697 return error_mark_node
;
8699 if (!type_dependent_expression_p (size
))
8701 tree type
= TREE_TYPE (size
);
8703 mark_rvalue_use (size
);
8705 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8706 && TREE_SIDE_EFFECTS (size
))
8707 /* In C++98, we mark a non-constant array bound with a magic
8708 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8711 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8713 if (CLASS_TYPE_P (type
)
8714 && CLASSTYPE_LITERAL_P (type
))
8716 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8719 if (!(complain
& tf_error
))
8720 return error_mark_node
;
8722 error ("size of array %qD has non-integral type %qT",
8725 error ("size of array has non-integral type %qT", type
);
8726 size
= integer_one_node
;
8728 if (size
== error_mark_node
)
8729 return error_mark_node
;
8730 type
= TREE_TYPE (size
);
8733 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8734 size
= maybe_constant_value (size
);
8736 if (!TREE_CONSTANT (size
))
8740 if (error_operand_p (size
))
8741 return error_mark_node
;
8743 /* The array bound must be an integer type. */
8744 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8746 if (!(complain
& tf_error
))
8747 return error_mark_node
;
8749 error ("size of array %qD has non-integral type %qT", name
, type
);
8751 error ("size of array has non-integral type %qT", type
);
8752 size
= integer_one_node
;
8753 type
= TREE_TYPE (size
);
8757 /* A type is dependent if it is...an array type constructed from any
8758 dependent type or whose size is specified by a constant expression
8759 that is value-dependent. */
8760 /* We can only call value_dependent_expression_p on integral constant
8761 expressions; treat non-constant expressions as dependent, too. */
8762 if (processing_template_decl
8763 && (type_dependent_expression_p (size
)
8764 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8766 /* We cannot do any checking for a SIZE that isn't known to be
8767 constant. Just build the index type and mark that it requires
8768 structural equality checks. */
8769 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8770 size
, size_one_node
));
8771 TYPE_DEPENDENT_P (itype
) = 1;
8772 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8773 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8777 if (TREE_CODE (size
) != INTEGER_CST
)
8779 tree folded
= cp_fully_fold (size
);
8780 if (TREE_CODE (folded
) == INTEGER_CST
)
8781 pedwarn (location_of (size
), OPT_Wpedantic
,
8782 "size of array is not an integral constant-expression");
8783 /* Use the folded result for VLAs, too; it will have resolved
8788 /* Normally, the array-bound will be a constant. */
8789 if (TREE_CODE (size
) == INTEGER_CST
)
8791 /* Check to see if the array bound overflowed. Make that an
8792 error, no matter how generous we're being. */
8793 constant_expression_error (size
);
8795 /* An array must have a positive number of elements. */
8796 if (tree_int_cst_lt (size
, integer_zero_node
))
8798 if (!(complain
& tf_error
))
8799 return error_mark_node
;
8801 error ("size of array %qD is negative", name
);
8803 error ("size of array is negative");
8804 size
= integer_one_node
;
8806 /* As an extension we allow zero-sized arrays. */
8807 else if (integer_zerop (size
))
8809 if (!(complain
& tf_error
))
8810 /* We must fail if performing argument deduction (as
8811 indicated by the state of complain), so that
8812 another substitution can be found. */
8813 return error_mark_node
;
8814 else if (in_system_header_at (input_location
))
8815 /* Allow them in system headers because glibc uses them. */;
8817 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8819 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8822 else if (TREE_CONSTANT (size
)
8823 /* We don't allow VLAs at non-function scopes, or during
8824 tentative template substitution. */
8825 || !at_function_scope_p ()
8826 || !(complain
& tf_error
))
8828 if (!(complain
& tf_error
))
8829 return error_mark_node
;
8830 /* `(int) &fn' is not a valid array bound. */
8832 error ("size of array %qD is not an integral constant-expression",
8835 error ("size of array is not an integral constant-expression");
8836 size
= integer_one_node
;
8838 else if (pedantic
&& warn_vla
!= 0)
8841 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8843 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8845 else if (warn_vla
> 0)
8849 "variable length array %qD is used", name
);
8852 "variable length array is used");
8855 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8856 /* A variable sized array. */
8857 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8860 HOST_WIDE_INT saved_processing_template_decl
;
8862 /* Compute the index of the largest element in the array. It is
8863 one less than the number of elements in the array. We save
8864 and restore PROCESSING_TEMPLATE_DECL so that computations in
8865 cp_build_binary_op will be appropriately folded. */
8866 saved_processing_template_decl
= processing_template_decl
;
8867 processing_template_decl
= 0;
8868 itype
= cp_build_binary_op (input_location
,
8870 cp_convert (ssizetype
, size
, complain
),
8871 cp_convert (ssizetype
, integer_one_node
,
8874 itype
= maybe_constant_value (itype
);
8875 processing_template_decl
= saved_processing_template_decl
;
8877 if (!TREE_CONSTANT (itype
))
8879 /* A variable sized array. */
8880 itype
= variable_size (itype
);
8882 stabilize_vla_size (itype
);
8884 if (flag_sanitize
& SANITIZE_VLA
8885 && do_ubsan_in_current_function ())
8887 /* We have to add 1 -- in the ubsan routine we generate
8888 LE_EXPR rather than LT_EXPR. */
8889 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8890 build_one_cst (TREE_TYPE (itype
)));
8891 t
= ubsan_instrument_vla (input_location
, t
);
8892 finish_expr_stmt (t
);
8895 /* Make sure that there was no overflow when creating to a signed
8896 index type. (For example, on a 32-bit machine, an array with
8897 size 2^32 - 1 is too big.) */
8898 else if (TREE_CODE (itype
) == INTEGER_CST
8899 && TREE_OVERFLOW (itype
))
8901 if (!(complain
& tf_error
))
8902 return error_mark_node
;
8903 error ("overflow in array dimension");
8904 TREE_OVERFLOW (itype
) = 0;
8908 /* Create and return the appropriate index type. */
8909 itype
= build_index_type (itype
);
8911 /* If the index type were dependent, we would have returned early, so
8912 remember that it isn't. */
8913 TYPE_DEPENDENT_P (itype
) = 0;
8914 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8918 /* Returns the scope (if any) in which the entity declared by
8919 DECLARATOR will be located. If the entity was declared with an
8920 unqualified name, NULL_TREE is returned. */
8923 get_scope_of_declarator (const cp_declarator
*declarator
)
8925 while (declarator
&& declarator
->kind
!= cdk_id
)
8926 declarator
= declarator
->declarator
;
8928 /* If the declarator-id is a SCOPE_REF, the scope in which the
8929 declaration occurs is the first operand. */
8931 && declarator
->u
.id
.qualifying_scope
)
8932 return declarator
->u
.id
.qualifying_scope
;
8934 /* Otherwise, the declarator is not a qualified name; the entity will
8935 be declared in the current scope. */
8939 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8940 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8944 create_array_type_for_decl (tree name
, tree type
, tree size
)
8946 tree itype
= NULL_TREE
;
8948 /* If things have already gone awry, bail now. */
8949 if (type
== error_mark_node
|| size
== error_mark_node
)
8950 return error_mark_node
;
8952 /* 8.3.4/1: If the type of the identifier of D contains the auto
8953 type-specifier, the program is ill-formed. */
8954 if (type_uses_auto (type
))
8956 error ("%qD declared as array of %qT", name
, type
);
8957 return error_mark_node
;
8960 /* If there are some types which cannot be array elements,
8961 issue an error-message and return. */
8962 switch (TREE_CODE (type
))
8966 error ("declaration of %qD as array of void", name
);
8968 error ("creating array of void");
8969 return error_mark_node
;
8973 error ("declaration of %qD as array of functions", name
);
8975 error ("creating array of functions");
8976 return error_mark_node
;
8978 case REFERENCE_TYPE
:
8980 error ("declaration of %qD as array of references", name
);
8982 error ("creating array of references");
8983 return error_mark_node
;
8987 error ("declaration of %qD as array of function members", name
);
8989 error ("creating array of function members");
8990 return error_mark_node
;
8998 The constant expressions that specify the bounds of the arrays
8999 can be omitted only for the first member of the sequence. */
9000 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
9003 error ("declaration of %qD as multidimensional array must "
9004 "have bounds for all dimensions except the first",
9007 error ("multidimensional array must have bounds for all "
9008 "dimensions except the first");
9010 return error_mark_node
;
9013 /* Figure out the index type for the array. */
9015 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
9018 T is called the array element type; this type shall not be [...] an
9019 abstract class type. */
9020 abstract_virtuals_error (name
, type
);
9022 return build_cplus_array_type (type
, itype
);
9025 /* Returns the smallest location != UNKNOWN_LOCATION among the
9026 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9027 and LOCATIONS[ds_restrict]. */
9030 smallest_type_quals_location (int type_quals
, const location_t
* locations
)
9032 location_t loc
= UNKNOWN_LOCATION
;
9034 if (type_quals
& TYPE_QUAL_CONST
)
9035 loc
= locations
[ds_const
];
9037 if ((type_quals
& TYPE_QUAL_VOLATILE
)
9038 && (loc
== UNKNOWN_LOCATION
|| locations
[ds_volatile
] < loc
))
9039 loc
= locations
[ds_volatile
];
9041 if ((type_quals
& TYPE_QUAL_RESTRICT
)
9042 && (loc
== UNKNOWN_LOCATION
|| locations
[ds_restrict
] < loc
))
9043 loc
= locations
[ds_restrict
];
9048 /* Check that it's OK to declare a function with the indicated TYPE
9049 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9050 that this function is. OPTYPE is the type given in a conversion
9051 operator declaration, or the class type for a constructor/destructor.
9052 Returns the actual return type of the function; that may be different
9053 than TYPE if an error occurs, or for certain special functions. */
9056 check_special_function_return_type (special_function_kind sfk
,
9060 const location_t
* locations
)
9064 case sfk_constructor
:
9066 error ("return type specification for constructor invalid");
9067 else if (type_quals
!= TYPE_UNQUALIFIED
)
9068 error_at (smallest_type_quals_location (type_quals
, locations
),
9069 "qualifiers are not allowed on constructor declaration");
9071 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
9072 type
= build_pointer_type (optype
);
9074 type
= void_type_node
;
9077 case sfk_destructor
:
9079 error ("return type specification for destructor invalid");
9080 else if (type_quals
!= TYPE_UNQUALIFIED
)
9081 error_at (smallest_type_quals_location (type_quals
, locations
),
9082 "qualifiers are not allowed on destructor declaration");
9084 /* We can't use the proper return type here because we run into
9085 problems with ambiguous bases and covariant returns.
9086 Java classes are left unchanged because (void *) isn't a valid
9087 Java type, and we don't want to change the Java ABI. */
9088 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
9089 type
= build_pointer_type (void_type_node
);
9091 type
= void_type_node
;
9094 case sfk_conversion
:
9096 error ("return type specified for %<operator %T%>", optype
);
9097 else if (type_quals
!= TYPE_UNQUALIFIED
)
9098 error_at (smallest_type_quals_location (type_quals
, locations
),
9099 "qualifiers are not allowed on declaration of "
9100 "%<operator %T%>", optype
);
9112 /* A variable or data member (whose unqualified name is IDENTIFIER)
9113 has been declared with the indicated TYPE. If the TYPE is not
9114 acceptable, issue an error message and return a type to use for
9115 error-recovery purposes. */
9118 check_var_type (tree identifier
, tree type
)
9120 if (VOID_TYPE_P (type
))
9123 error ("unnamed variable or field declared void");
9124 else if (identifier_p (identifier
))
9126 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
9127 error ("variable or field %qE declared void", identifier
);
9130 error ("variable or field declared void");
9131 type
= error_mark_node
;
9137 /* Given declspecs and a declarator (abstract or otherwise), determine
9138 the name and type of the object declared and construct a DECL node
9141 DECLSPECS points to the representation of declaration-specifier
9142 sequence that precedes declarator.
9144 DECL_CONTEXT says which syntactic context this declaration is in:
9145 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9146 FUNCDEF for a function definition. Like NORMAL but a few different
9147 error messages in each case. Return value may be zero meaning
9148 this definition is too screwy to try to parse.
9149 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9150 handle member functions (which have FIELD context).
9151 Return value may be zero meaning this definition is too screwy to
9153 PARM for a parameter declaration (either within a function prototype
9154 or before a function body). Make a PARM_DECL, or return void_type_node.
9155 TPARM for a template parameter declaration.
9156 CATCHPARM for a parameter declaration before a catch clause.
9157 TYPENAME if for a typename (in a cast or sizeof).
9158 Don't make a DECL node; just return the ..._TYPE node.
9159 FIELD for a struct or union field; make a FIELD_DECL.
9160 BITFIELD for a field with specified width.
9162 INITIALIZED is as for start_decl.
9164 ATTRLIST is a pointer to the list of attributes, which may be NULL
9165 if there are none; *ATTRLIST may be modified if attributes from inside
9166 the declarator should be applied to the declaration.
9168 When this function is called, scoping variables (such as
9169 CURRENT_CLASS_TYPE) should reflect the scope in which the
9170 declaration occurs, not the scope in which the new declaration will
9171 be placed. For example, on:
9175 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9178 Returns a DECL (if a declarator is present), a TYPE (if there is no
9179 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9183 grokdeclarator (const cp_declarator
*declarator
,
9184 cp_decl_specifier_seq
*declspecs
,
9185 enum decl_context decl_context
,
9189 tree type
= NULL_TREE
;
9191 int explicit_intN
= 0;
9192 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
9193 int explicit_int
= 0;
9194 int explicit_char
= 0;
9195 int defaulted_int
= 0;
9197 tree typedef_decl
= NULL_TREE
;
9198 const char *name
= NULL
;
9199 tree typedef_type
= NULL_TREE
;
9200 /* True if this declarator is a function definition. */
9201 bool funcdef_flag
= false;
9202 cp_declarator_kind innermost_code
= cdk_error
;
9205 /* See the code below that used this. */
9206 tree decl_attr
= NULL_TREE
;
9209 /* Keep track of what sort of function is being processed
9210 so that we can warn about default return values, or explicit
9211 return values which do not match prescribed defaults. */
9212 special_function_kind sfk
= sfk_none
;
9214 tree dname
= NULL_TREE
;
9215 tree ctor_return_type
= NULL_TREE
;
9216 enum overload_flags flags
= NO_SPECIAL
;
9217 /* cv-qualifiers that apply to the declarator, for a declaration of
9218 a member function. */
9219 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
9220 /* virt-specifiers that apply to the declarator, for a declaration of
9221 a member function. */
9222 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
9223 /* ref-qualifier that applies to the declarator, for a declaration of
9224 a member function. */
9225 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
9226 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9227 int type_quals
= TYPE_UNQUALIFIED
;
9228 tree raises
= NULL_TREE
;
9229 int template_count
= 0;
9230 tree returned_attrs
= NULL_TREE
;
9231 tree parms
= NULL_TREE
;
9232 const cp_declarator
*id_declarator
;
9233 /* The unqualified name of the declarator; either an
9234 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9235 tree unqualified_id
;
9236 /* The class type, if any, in which this entity is located,
9237 or NULL_TREE if none. Note that this value may be different from
9238 the current class type; for example if an attempt is made to declare
9239 "A::f" inside "B", this value will be "A". */
9240 tree ctype
= current_class_type
;
9241 /* The NAMESPACE_DECL for the namespace in which this entity is
9242 located. If an unqualified name is used to declare the entity,
9243 this value will be NULL_TREE, even if the entity is located at
9245 tree in_namespace
= NULL_TREE
;
9246 cp_storage_class storage_class
;
9247 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
9248 bool type_was_error_mark_node
= false;
9249 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
9250 bool template_type_arg
= false;
9251 bool template_parm_flag
= false;
9252 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
9253 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
9254 bool late_return_type_p
= false;
9255 bool array_parameter_p
= false;
9256 source_location saved_loc
= input_location
;
9257 tree reqs
= NULL_TREE
;
9259 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
9260 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
9261 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
9262 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
9263 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
9264 explicit_intN
= declspecs
->explicit_intN_p
;
9265 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
9267 // Was concept_p specified? Note that ds_concept
9268 // implies ds_constexpr!
9269 bool concept_p
= decl_spec_seq_has_spec_p (declspecs
, ds_concept
);
9273 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9274 type_quals
|= TYPE_QUAL_CONST
;
9275 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9276 type_quals
|= TYPE_QUAL_VOLATILE
;
9277 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9278 type_quals
|= TYPE_QUAL_RESTRICT
;
9280 if (decl_context
== FUNCDEF
)
9281 funcdef_flag
= true, decl_context
= NORMAL
;
9282 else if (decl_context
== MEMFUNCDEF
)
9283 funcdef_flag
= true, decl_context
= FIELD
;
9284 else if (decl_context
== BITFIELD
)
9285 bitfield
= 1, decl_context
= FIELD
;
9286 else if (decl_context
== TEMPLATE_TYPE_ARG
)
9287 template_type_arg
= true, decl_context
= TYPENAME
;
9288 else if (decl_context
== TPARM
)
9289 template_parm_flag
= true, decl_context
= PARM
;
9291 if (initialized
> 1)
9292 funcdef_flag
= true;
9294 /* Look inside a declarator for the name being declared
9295 and get it as a string, for an error message. */
9296 for (id_declarator
= declarator
;
9298 id_declarator
= id_declarator
->declarator
)
9300 if (id_declarator
->kind
!= cdk_id
)
9301 innermost_code
= id_declarator
->kind
;
9303 switch (id_declarator
->kind
)
9306 if (id_declarator
->declarator
9307 && id_declarator
->declarator
->kind
== cdk_id
)
9309 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
9310 if (sfk
== sfk_destructor
)
9317 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9318 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9321 if (qualifying_scope
)
9323 if (at_function_scope_p ())
9327 A declarator-id shall not be qualified except
9330 None of the cases are permitted in block
9332 if (qualifying_scope
== global_namespace
)
9333 error ("invalid use of qualified-name %<::%D%>",
9335 else if (TYPE_P (qualifying_scope
))
9336 error ("invalid use of qualified-name %<%T::%D%>",
9337 qualifying_scope
, decl
);
9339 error ("invalid use of qualified-name %<%D::%D%>",
9340 qualifying_scope
, decl
);
9341 return error_mark_node
;
9343 else if (TYPE_P (qualifying_scope
))
9345 ctype
= qualifying_scope
;
9346 if (!MAYBE_CLASS_TYPE_P (ctype
))
9348 error ("%q#T is not a class or a namespace", ctype
);
9351 else if (innermost_code
!= cdk_function
9352 && current_class_type
9353 && !uniquely_derived_from_p (ctype
,
9354 current_class_type
))
9356 error ("invalid use of qualified-name %<%T::%D%>",
9357 qualifying_scope
, decl
);
9358 return error_mark_node
;
9361 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9362 in_namespace
= qualifying_scope
;
9364 switch (TREE_CODE (decl
))
9370 if (innermost_code
!= cdk_function
)
9372 error ("declaration of %qD as non-function", decl
);
9373 return error_mark_node
;
9375 else if (!qualifying_scope
9376 && !(current_class_type
&& at_class_scope_p ()))
9378 error ("declaration of %qD as non-member", decl
);
9379 return error_mark_node
;
9382 type
= TREE_OPERAND (decl
, 0);
9384 type
= constructor_name (type
);
9385 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9390 case TEMPLATE_ID_EXPR
:
9392 tree fns
= TREE_OPERAND (decl
, 0);
9395 if (!identifier_p (dname
))
9397 if (variable_template_p (dname
))
9398 dname
= DECL_NAME (dname
);
9401 gcc_assert (is_overloaded_fn (dname
));
9402 dname
= DECL_NAME (get_first_fn (dname
));
9408 case IDENTIFIER_NODE
:
9409 if (identifier_p (decl
))
9412 if (C_IS_RESERVED_WORD (dname
))
9414 error ("declarator-id missing; using reserved word %qD",
9416 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9418 else if (!IDENTIFIER_TYPENAME_P (dname
))
9419 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9422 gcc_assert (flags
== NO_SPECIAL
);
9423 flags
= TYPENAME_FLAG
;
9424 ctor_return_type
= TREE_TYPE (dname
);
9425 sfk
= sfk_conversion
;
9426 if (is_typename_at_global_scope (dname
))
9427 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9429 name
= "<invalid operator>";
9446 return error_mark_node
;
9451 if (id_declarator
->kind
== cdk_id
)
9457 The declarator in a function-definition shall have the form
9458 D1 ( parameter-declaration-clause) ... */
9459 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9461 error ("function definition does not declare parameters");
9462 return error_mark_node
;
9465 if (flags
== TYPENAME_FLAG
9466 && innermost_code
!= cdk_function
9467 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9469 error ("declaration of %qD as non-function", dname
);
9470 return error_mark_node
;
9474 && identifier_p (dname
)
9475 && UDLIT_OPER_P (dname
)
9476 && innermost_code
!= cdk_function
)
9478 error ("declaration of %qD as non-function", dname
);
9479 return error_mark_node
;
9482 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9486 error ("declaration of %qD as %<typedef%>", dname
);
9487 return error_mark_node
;
9489 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9491 error ("declaration of %qD as parameter", dname
);
9492 return error_mark_node
;
9496 /* Anything declared one level down from the top level
9497 must be one of the parameters of a function
9498 (because the body is at least two levels down). */
9500 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9501 by not allowing C++ class definitions to specify their parameters
9502 with xdecls (must be spec.d in the parmlist).
9504 Since we now wait to push a class scope until we are sure that
9505 we are in a legitimate method context, we must set oldcname
9506 explicitly (since current_class_name is not yet alive).
9508 We also want to avoid calling this a PARM if it is in a namespace. */
9510 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9512 cp_binding_level
*b
= current_binding_level
;
9513 current_binding_level
= b
->level_chain
;
9514 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9515 decl_context
= PARM
;
9516 current_binding_level
= b
;
9520 name
= decl_context
== PARM
? "parameter" : "type name";
9522 if (concept_p
&& typedef_p
)
9524 error ("%<concept%> cannot appear in a typedef declaration");
9525 return error_mark_node
;
9528 if (constexpr_p
&& typedef_p
)
9530 error ("%<constexpr%> cannot appear in a typedef declaration");
9531 return error_mark_node
;
9534 /* If there were multiple types specified in the decl-specifier-seq,
9535 issue an error message. */
9536 if (declspecs
->multiple_types_p
)
9538 error ("two or more data types in declaration of %qs", name
);
9539 return error_mark_node
;
9542 if (declspecs
->conflicting_specifiers_p
)
9544 error ("conflicting specifiers in declaration of %qs", name
);
9545 return error_mark_node
;
9548 /* Extract the basic type from the decl-specifier-seq. */
9549 type
= declspecs
->type
;
9550 if (type
== error_mark_node
)
9553 type_was_error_mark_node
= true;
9555 /* If the entire declaration is itself tagged as deprecated then
9556 suppress reports of deprecated items. */
9557 if (type
&& TREE_DEPRECATED (type
)
9558 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9559 warn_deprecated_use (type
, NULL_TREE
);
9560 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9562 typedef_decl
= type
;
9563 type
= TREE_TYPE (typedef_decl
);
9564 if (TREE_DEPRECATED (type
)
9565 && DECL_ARTIFICIAL (typedef_decl
)
9566 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9567 warn_deprecated_use (type
, NULL_TREE
);
9569 /* No type at all: default to `int', and set DEFAULTED_INT
9570 because it was not a user-defined typedef. */
9571 if (type
== NULL_TREE
)
9573 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9575 /* These imply 'int'. */
9576 type
= integer_type_node
;
9579 /* If we just have "complex", it is equivalent to "complex double". */
9580 else if (!longlong
&& !explicit_intN
9581 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9583 type
= double_type_node
;
9584 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9585 "ISO C++ does not support plain %<complex%> meaning "
9586 "%<double complex%>");
9590 explicit_int
= declspecs
->explicit_int_p
;
9591 explicit_char
= declspecs
->explicit_char_p
;
9594 /* See the code below that used this. */
9596 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9598 typedef_type
= type
;
9601 if (sfk
!= sfk_conversion
)
9602 ctor_return_type
= ctype
;
9604 if (sfk
!= sfk_none
)
9606 type
= check_special_function_return_type (sfk
, type
,
9609 declspecs
->locations
);
9610 type_quals
= TYPE_UNQUALIFIED
;
9612 else if (type
== NULL_TREE
)
9618 /* We handle `main' specially here, because 'main () { }' is so
9619 common. With no options, it is allowed. With -Wreturn-type,
9620 it is a warning. It is only an error with -pedantic-errors. */
9621 is_main
= (funcdef_flag
9622 && dname
&& identifier_p (dname
)
9623 && MAIN_NAME_P (dname
)
9624 && ctype
== NULL_TREE
9625 && in_namespace
== NULL_TREE
9626 && current_namespace
== global_namespace
);
9628 if (type_was_error_mark_node
)
9629 /* We've already issued an error, don't complain more. */;
9630 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9631 /* Allow it, sigh. */;
9633 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9635 pedwarn (input_location
, OPT_Wpedantic
,
9636 "ISO C++ forbids declaration of %qs with no type", name
);
9638 warning (OPT_Wreturn_type
,
9639 "ISO C++ forbids declaration of %qs with no type", name
);
9641 if (type_was_error_mark_node
&& template_parm_flag
)
9642 /* FIXME we should be able to propagate the error_mark_node as is
9643 for other contexts too. */
9644 type
= error_mark_node
;
9646 type
= integer_type_node
;
9653 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9655 error ("%<__int%d%> is not supported by this target",
9656 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9657 explicit_intN
= false;
9659 else if (pedantic
&& ! in_system_header_at (input_location
))
9660 pedwarn (input_location
, OPT_Wpedantic
,
9661 "ISO C++ does not support %<__int%d%> for %qs",
9662 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9665 /* Now process the modifiers that were specified
9666 and check for invalid combinations. */
9668 /* Long double is a special combination. */
9669 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9672 type
= cp_build_qualified_type (long_double_type_node
,
9673 cp_type_quals (type
));
9676 /* Check all other uses of type modifiers. */
9678 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9682 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9683 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9684 else if (signed_p
&& unsigned_p
)
9685 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9686 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9687 error ("%<long long%> invalid for %qs", name
);
9688 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9689 error ("%<long%> invalid for %qs", name
);
9690 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9691 error ("%<short%> invalid for %qs", name
);
9692 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9693 error ("%<long%> or %<short%> invalid for %qs", name
);
9694 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9695 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9696 else if ((long_p
|| short_p
) && explicit_char
)
9697 error ("%<long%> or %<short%> specified with char for %qs", name
);
9698 else if (long_p
&& short_p
)
9699 error ("%<long%> and %<short%> specified together for %qs", name
);
9700 else if (type
== char16_type_node
|| type
== char32_type_node
)
9702 if (signed_p
|| unsigned_p
)
9703 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9704 else if (short_p
|| long_p
)
9705 error ("%<short%> or %<long%> invalid for %qs", name
);
9710 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9712 pedwarn (input_location
, OPT_Wpedantic
,
9713 "long, short, signed or unsigned used invalidly for %qs",
9715 if (flag_pedantic_errors
)
9720 /* Discard the type modifiers if they are invalid. */
9731 /* Decide whether an integer type is signed or not.
9732 Optionally treat bitfields as signed by default. */
9736 It is implementation-defined whether a plain (neither
9737 explicitly signed or unsigned) char, short, int, or long
9738 bit-field is signed or unsigned.
9740 Naturally, we extend this to long long as well. Note that
9741 this does not include wchar_t. */
9742 || (bitfield
&& !flag_signed_bitfields
9744 /* A typedef for plain `int' without `signed' can be
9745 controlled just like plain `int', but a typedef for
9746 `signed int' cannot be so controlled. */
9748 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9749 && TREE_CODE (type
) == INTEGER_TYPE
9750 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9753 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9755 type
= long_long_unsigned_type_node
;
9757 type
= long_unsigned_type_node
;
9759 type
= short_unsigned_type_node
;
9760 else if (type
== char_type_node
)
9761 type
= unsigned_char_type_node
;
9762 else if (typedef_decl
)
9763 type
= unsigned_type_for (type
);
9765 type
= unsigned_type_node
;
9767 else if (signed_p
&& type
== char_type_node
)
9768 type
= signed_char_type_node
;
9769 else if (explicit_intN
)
9770 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9772 type
= long_long_integer_type_node
;
9774 type
= long_integer_type_node
;
9776 type
= short_integer_type_node
;
9778 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9780 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9781 error ("complex invalid for %qs", name
);
9782 /* If a modifier is specified, the resulting complex is the complex
9783 form of TYPE. E.g, "complex short" is "complex short int". */
9784 else if (type
== integer_type_node
)
9785 type
= complex_integer_type_node
;
9786 else if (type
== float_type_node
)
9787 type
= complex_float_type_node
;
9788 else if (type
== double_type_node
)
9789 type
= complex_double_type_node
;
9790 else if (type
== long_double_type_node
)
9791 type
= complex_long_double_type_node
;
9793 type
= build_complex_type (type
);
9796 /* If we're using the injected-class-name to form a compound type or a
9797 declaration, replace it with the underlying class so we don't get
9798 redundant typedefs in the debug output. But if we are returning the
9799 type unchanged, leave it alone so that it's available to
9800 maybe_get_template_decl_from_type_decl. */
9801 if (CLASS_TYPE_P (type
)
9802 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9803 && type
== TREE_TYPE (TYPE_NAME (type
))
9804 && (declarator
|| type_quals
))
9805 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9807 type_quals
|= cp_type_quals (type
);
9808 type
= cp_build_qualified_type_real
9809 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9810 || declspecs
->decltype_p
)
9811 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9812 /* We might have ignored or rejected some of the qualifiers. */
9813 type_quals
= cp_type_quals (type
);
9816 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9817 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9818 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9820 storage_class
= declspecs
->storage_class
;
9821 if (storage_class
== sc_static
)
9822 staticp
= 1 + (decl_context
== FIELD
);
9828 error ("member %qD cannot be declared both %<virtual%> "
9829 "and %<static%>", dname
);
9830 storage_class
= sc_none
;
9834 error ("member %qD cannot be declared both %<virtual%> "
9835 "and %<constexpr%>", dname
);
9837 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9839 /* Issue errors about use of storage classes for parameters. */
9840 if (decl_context
== PARM
)
9844 error ("typedef declaration invalid in parameter declaration");
9845 return error_mark_node
;
9847 else if (template_parm_flag
&& storage_class
!= sc_none
)
9849 error ("storage class specified for template parameter %qs", name
);
9850 return error_mark_node
;
9852 else if (storage_class
== sc_static
9853 || storage_class
== sc_extern
9855 error ("storage class specifiers invalid in parameter declarations");
9857 /* Function parameters cannot be concept. */
9859 error ("a parameter cannot be declared %<concept%>");
9860 /* Function parameters cannot be constexpr. If we saw one, moan
9861 and pretend it wasn't there. */
9862 else if (constexpr_p
)
9864 error ("a parameter cannot be declared %<constexpr%>");
9869 /* Give error if `virtual' is used outside of class declaration. */
9871 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9873 error_at (declspecs
->locations
[ds_virtual
],
9874 "%<virtual%> outside class declaration");
9878 /* Static anonymous unions are dealt with here. */
9879 if (staticp
&& decl_context
== TYPENAME
9881 && ANON_AGGR_TYPE_P (declspecs
->type
))
9882 decl_context
= FIELD
;
9884 /* Warn about storage classes that are invalid for certain
9885 kinds of declarations (parameters, typenames, etc.). */
9888 && storage_class
!= sc_extern
9889 && storage_class
!= sc_static
)
9892 error ("multiple storage classes in declaration of %qs", name
);
9895 if (decl_context
!= NORMAL
9896 && ((storage_class
!= sc_none
9897 && storage_class
!= sc_mutable
)
9900 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9901 && (storage_class
== sc_register
9902 || storage_class
== sc_auto
))
9906 else if (decl_context
== FIELD
9907 /* C++ allows static class elements. */
9908 && storage_class
== sc_static
)
9909 /* C++ also allows inlines and signed and unsigned elements,
9910 but in those cases we don't come in here. */
9914 if (decl_context
== FIELD
)
9915 error ("storage class specified for %qs", name
);
9918 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9919 error ("storage class specified for parameter %qs", name
);
9921 error ("storage class specified for typename");
9923 if (storage_class
== sc_register
9924 || storage_class
== sc_auto
9925 || storage_class
== sc_extern
9927 storage_class
= sc_none
;
9930 else if (storage_class
== sc_extern
&& funcdef_flag
9931 && ! toplevel_bindings_p ())
9932 error ("nested function %qs declared %<extern%>", name
);
9933 else if (toplevel_bindings_p ())
9935 if (storage_class
== sc_auto
)
9936 error ("top-level declaration of %qs specifies %<auto%>", name
);
9939 && storage_class
!= sc_extern
9940 && storage_class
!= sc_static
)
9942 if (declspecs
->gnu_thread_keyword_p
)
9943 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9944 "declared %<__thread%>", name
);
9946 /* When thread_local is applied to a variable of block scope the
9947 storage-class-specifier static is implied if it does not appear
9949 storage_class
= declspecs
->storage_class
= sc_static
;
9953 if (storage_class
&& friendp
)
9955 error ("storage class specifiers invalid in friend function declarations");
9956 storage_class
= sc_none
;
9961 unqualified_id
= NULL_TREE
;
9964 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9965 switch (TREE_CODE (unqualified_id
))
9968 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9969 if (TYPE_P (unqualified_id
))
9970 unqualified_id
= constructor_name (unqualified_id
);
9973 case IDENTIFIER_NODE
:
9974 case TEMPLATE_ID_EXPR
:
9982 if (declspecs
->std_attributes
)
9984 /* Apply the c++11 attributes to the type preceding them. */
9985 input_location
= declspecs
->locations
[ds_std_attribute
];
9986 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9987 input_location
= saved_loc
;
9990 /* Determine the type of the entity declared by recurring on the
9992 for (; declarator
; declarator
= declarator
->declarator
)
9994 const cp_declarator
*inner_declarator
;
9997 if (type
== error_mark_node
)
9998 return error_mark_node
;
10000 attrs
= declarator
->attributes
;
10006 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
10007 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
10008 if (declarator
->kind
== cdk_function
)
10009 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
10010 if (declarator
->kind
== cdk_array
)
10011 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
10012 returned_attrs
= decl_attributes (&type
,
10013 chainon (returned_attrs
, attrs
),
10017 if (declarator
->kind
== cdk_id
)
10020 inner_declarator
= declarator
->declarator
;
10022 switch (declarator
->kind
)
10025 type
= create_array_type_for_decl (dname
, type
,
10026 declarator
->u
.array
.bounds
);
10027 if (!valid_array_size_p (input_location
, type
, dname
))
10028 type
= error_mark_node
;
10030 if (declarator
->std_attributes
)
10033 The optional attribute-specifier-seq appertains to the
10035 returned_attrs
= chainon (returned_attrs
,
10036 declarator
->std_attributes
);
10044 /* Declaring a function type.
10045 Make sure we have a valid type for the function to return. */
10047 if (type_quals
!= TYPE_UNQUALIFIED
)
10049 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
10050 warning (OPT_Wignored_qualifiers
,
10051 "type qualifiers ignored on function return type");
10052 /* We now know that the TYPE_QUALS don't apply to the
10053 decl, but to its return type. */
10054 type_quals
= TYPE_UNQUALIFIED
;
10057 /* Error about some types functions can't return. */
10059 if (TREE_CODE (type
) == FUNCTION_TYPE
)
10061 error ("%qs declared as function returning a function", name
);
10062 return error_mark_node
;
10064 if (TREE_CODE (type
) == ARRAY_TYPE
)
10066 error ("%qs declared as function returning an array", name
);
10067 return error_mark_node
;
10070 input_location
= declspecs
->locations
[ds_type_spec
];
10071 abstract_virtuals_error (ACU_RETURN
, type
);
10072 input_location
= saved_loc
;
10074 /* Pick up type qualifiers which should be applied to `this'. */
10075 memfn_quals
= declarator
->u
.function
.qualifiers
;
10076 /* Pick up virt-specifiers. */
10077 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
10078 /* And ref-qualifier, too */
10079 rqual
= declarator
->u
.function
.ref_qualifier
;
10080 /* And tx-qualifier. */
10081 tree tx_qual
= declarator
->u
.function
.tx_qualifier
;
10082 /* Pick up the exception specifications. */
10083 raises
= declarator
->u
.function
.exception_specification
;
10084 /* If the exception-specification is ill-formed, let's pretend
10085 there wasn't one. */
10086 if (raises
== error_mark_node
)
10087 raises
= NULL_TREE
;
10090 error_at (location_of (reqs
), "requires-clause on return type");
10091 reqs
= declarator
->u
.function
.requires_clause
;
10093 /* Say it's a definition only for the CALL_EXPR
10094 closest to the identifier. */
10095 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
10097 /* Handle a late-specified return type. */
10100 if (type_uses_auto (type
))
10102 if (!declarator
->u
.function
.late_return_type
)
10104 if (current_class_type
10105 && LAMBDA_TYPE_P (current_class_type
))
10106 /* OK for C++11 lambdas. */;
10107 else if (cxx_dialect
< cxx14
)
10109 error ("%qs function uses "
10110 "%<auto%> type specifier without trailing "
10111 "return type", name
);
10112 inform (input_location
, "deduced return type "
10113 "only available with -std=c++14 or "
10118 error ("virtual function cannot "
10119 "have deduced return type");
10123 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
10125 error ("%qs function with trailing return type has"
10126 " %qT as its type rather than plain %<auto%>",
10128 return error_mark_node
;
10131 else if (declarator
->u
.function
.late_return_type
10132 && sfk
!= sfk_conversion
)
10134 if (cxx_dialect
< cxx11
)
10135 /* Not using maybe_warn_cpp0x because this should
10136 always be an error. */
10137 error ("trailing return type only available with "
10138 "-std=c++11 or -std=gnu++11");
10140 error ("%qs function with trailing return type not "
10141 "declared with %<auto%> type specifier", name
);
10142 return error_mark_node
;
10145 type
= splice_late_return_type
10146 (type
, declarator
->u
.function
.late_return_type
);
10147 if (type
== error_mark_node
)
10148 return error_mark_node
;
10150 if (declarator
->u
.function
.late_return_type
)
10151 late_return_type_p
= true;
10153 if (ctype
== NULL_TREE
10154 && decl_context
== FIELD
10157 ctype
= current_class_type
;
10159 if (ctype
&& (sfk
== sfk_constructor
10160 || sfk
== sfk_destructor
))
10162 /* We are within a class's scope. If our declarator name
10163 is the same as the class name, and we are defining
10164 a function, then it is a constructor/destructor, and
10165 therefore returns a void type. */
10167 /* ISO C++ 12.4/2. A destructor may not be declared
10168 const or volatile. A destructor may not be static.
10169 A destructor may not be declared with ref-qualifier.
10171 ISO C++ 12.1. A constructor may not be declared
10172 const or volatile. A constructor may not be
10173 virtual. A constructor may not be static.
10174 A constructor may not be declared with ref-qualifier. */
10176 error ((flags
== DTOR_FLAG
)
10177 ? G_("destructor cannot be static member function")
10178 : G_("constructor cannot be static member function"));
10181 error ((flags
== DTOR_FLAG
)
10182 ? G_("destructors may not be cv-qualified")
10183 : G_("constructors may not be cv-qualified"));
10184 memfn_quals
= TYPE_UNQUALIFIED
;
10189 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
10190 error ((flags
== DTOR_FLAG
)
10191 ? "destructors may not be ref-qualified"
10192 : "constructors may not be ref-qualified");
10193 rqual
= REF_QUAL_NONE
;
10196 if (decl_context
== FIELD
10197 && !member_function_or_else (ctype
,
10198 current_class_type
,
10200 return error_mark_node
;
10202 if (flags
!= DTOR_FLAG
)
10204 /* It's a constructor. */
10205 if (explicitp
== 1)
10209 permerror (input_location
,
10210 "constructors cannot be declared %<virtual%>");
10213 if (decl_context
== FIELD
10214 && sfk
!= sfk_constructor
)
10215 return error_mark_node
;
10217 if (decl_context
== FIELD
)
10224 /* Cannot be both friend and virtual. */
10225 error ("virtual functions cannot be friends");
10228 if (decl_context
== NORMAL
)
10229 error ("friend declaration not in class definition");
10230 if (current_function_decl
&& funcdef_flag
)
10231 error ("can%'t define friend function %qs in a local "
10232 "class definition",
10235 else if (ctype
&& sfk
== sfk_conversion
)
10237 if (explicitp
== 1)
10239 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
10242 if (late_return_type_p
)
10243 error ("a conversion function cannot have a trailing return type");
10246 arg_types
= grokparms (declarator
->u
.function
.parameters
,
10249 if (inner_declarator
10250 && inner_declarator
->kind
== cdk_id
10251 && inner_declarator
->u
.id
.sfk
== sfk_destructor
10252 && arg_types
!= void_list_node
)
10254 error ("destructors may not have parameters");
10255 arg_types
= void_list_node
;
10259 type
= build_function_type (type
, arg_types
);
10261 tree attrs
= declarator
->std_attributes
;
10264 tree att
= build_tree_list (tx_qual
, NULL_TREE
);
10265 /* transaction_safe applies to the type, but
10266 transaction_safe_dynamic applies to the function. */
10267 if (is_attribute_p ("transaction_safe", tx_qual
))
10268 attrs
= chainon (attrs
, att
);
10270 returned_attrs
= chainon (returned_attrs
, att
);
10275 The optional attribute-specifier-seq appertains to
10276 the function type. */
10277 decl_attributes (&type
, attrs
, 0);
10282 case cdk_reference
:
10284 /* Filter out pointers-to-references and references-to-references.
10285 We can get these if a TYPE_DECL is used. */
10287 if (TREE_CODE (type
) == REFERENCE_TYPE
)
10289 if (declarator
->kind
!= cdk_reference
)
10291 error ("cannot declare pointer to %q#T", type
);
10292 type
= TREE_TYPE (type
);
10295 /* In C++0x, we allow reference to reference declarations
10296 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
10297 and template type arguments [14.3.1/4 temp.arg.type]. The
10298 check for direct reference to reference declarations, which
10299 are still forbidden, occurs below. Reasoning behind the change
10300 can be found in DR106, DR540, and the rvalue reference
10302 else if (cxx_dialect
== cxx98
)
10304 error ("cannot declare reference to %q#T", type
);
10305 type
= TREE_TYPE (type
);
10308 else if (VOID_TYPE_P (type
))
10310 if (declarator
->kind
== cdk_reference
)
10311 error ("cannot declare reference to %q#T", type
);
10312 else if (declarator
->kind
== cdk_ptrmem
)
10313 error ("cannot declare pointer to %q#T member", type
);
10316 /* We now know that the TYPE_QUALS don't apply to the decl,
10317 but to the target of the pointer. */
10318 type_quals
= TYPE_UNQUALIFIED
;
10320 /* This code used to handle METHOD_TYPE, but I don't think it's
10321 possible to get it here anymore. */
10322 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
10323 if (declarator
->kind
== cdk_ptrmem
10324 && TREE_CODE (type
) == FUNCTION_TYPE
)
10326 memfn_quals
|= type_memfn_quals (type
);
10327 type
= build_memfn_type (type
,
10328 declarator
->u
.pointer
.class_type
,
10331 if (type
== error_mark_node
)
10332 return error_mark_node
;
10334 rqual
= REF_QUAL_NONE
;
10335 memfn_quals
= TYPE_UNQUALIFIED
;
10338 if (TREE_CODE (type
) == FUNCTION_TYPE
10339 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10340 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
10341 error (declarator
->kind
== cdk_reference
10342 ? G_("cannot declare reference to qualified function type %qT")
10343 : G_("cannot declare pointer to qualified function type %qT"),
10346 /* When the pointed-to type involves components of variable size,
10347 care must be taken to ensure that the size evaluation code is
10348 emitted early enough to dominate all the possible later uses
10349 and late enough for the variables on which it depends to have
10352 This is expected to happen automatically when the pointed-to
10353 type has a name/declaration of it's own, but special attention
10354 is required if the type is anonymous.
10356 We handle the NORMAL and FIELD contexts here by inserting a
10357 dummy statement that just evaluates the size at a safe point
10358 and ensures it is not deferred until e.g. within a deeper
10359 conditional context (c++/43555).
10361 We expect nothing to be needed here for PARM or TYPENAME.
10362 Evaluating the size at this point for TYPENAME would
10363 actually be incorrect, as we might be in the middle of an
10364 expression with side effects on the pointed-to type size
10365 "arguments" prior to the pointer declaration point and the
10366 size evaluation could end up prior to the side effects. */
10368 if (!TYPE_NAME (type
)
10369 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10370 && at_function_scope_p ()
10371 && variably_modified_type_p (type
, NULL_TREE
))
10373 TYPE_NAME (type
) = build_decl (UNKNOWN_LOCATION
, TYPE_DECL
,
10375 add_decl_expr (TYPE_NAME (type
));
10378 if (declarator
->kind
== cdk_reference
)
10380 /* In C++0x, the type we are creating a reference to might be
10381 a typedef which is itself a reference type. In that case,
10382 we follow the reference collapsing rules in
10383 [7.1.3/8 dcl.typedef] to create the final reference type:
10385 "If a typedef TD names a type that is a reference to a type
10386 T, an attempt to create the type 'lvalue reference to cv TD'
10387 creates the type 'lvalue reference to T,' while an attempt
10388 to create the type "rvalue reference to cv TD' creates the
10391 if (VOID_TYPE_P (type
))
10392 /* We already gave an error. */;
10393 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10395 if (declarator
->u
.reference
.rvalue_ref
)
10396 /* Leave type alone. */;
10398 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10401 type
= cp_build_reference_type
10402 (type
, declarator
->u
.reference
.rvalue_ref
);
10404 /* In C++0x, we need this check for direct reference to
10405 reference declarations, which are forbidden by
10406 [8.3.2/5 dcl.ref]. Reference to reference declarations
10407 are only allowed indirectly through typedefs and template
10408 type arguments. Example:
10410 void foo(int & &); // invalid ref-to-ref decl
10412 typedef int & int_ref;
10413 void foo(int_ref &); // valid ref-to-ref decl
10415 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10416 error ("cannot declare reference to %q#T, which is not "
10417 "a typedef or a template type argument", type
);
10419 else if (TREE_CODE (type
) == METHOD_TYPE
)
10420 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10421 else if (declarator
->kind
== cdk_ptrmem
)
10423 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10424 != NAMESPACE_DECL
);
10425 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10426 /* We will already have complained. */
10427 type
= error_mark_node
;
10429 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10433 type
= build_pointer_type (type
);
10435 /* Process a list of type modifier keywords (such as
10436 const or volatile) that were given inside the `*' or `&'. */
10438 if (declarator
->u
.pointer
.qualifiers
)
10441 = cp_build_qualified_type (type
,
10442 declarator
->u
.pointer
.qualifiers
);
10443 type_quals
= cp_type_quals (type
);
10446 /* Apply C++11 attributes to the pointer, and not to the
10447 type pointed to. This is unlike what is done for GNU
10448 attributes above. It is to comply with [dcl.ptr]/1:
10450 [the optional attribute-specifier-seq (7.6.1) appertains
10451 to the pointer and not to the object pointed to]. */
10452 if (declarator
->std_attributes
)
10453 decl_attributes (&type
, declarator
->std_attributes
,
10463 gcc_unreachable ();
10467 /* A `constexpr' specifier used in an object declaration declares
10468 the object as `const'. */
10469 if (constexpr_p
&& innermost_code
!= cdk_function
)
10471 /* DR1688 says that a `constexpr' specifier in combination with
10472 `volatile' is valid. */
10474 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10476 type_quals
|= TYPE_QUAL_CONST
;
10477 type
= cp_build_qualified_type (type
, type_quals
);
10481 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10482 && TREE_CODE (type
) != FUNCTION_TYPE
10483 && TREE_CODE (type
) != METHOD_TYPE
10484 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10486 error ("template-id %qD used as a declarator",
10488 unqualified_id
= dname
;
10491 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10492 qualified with a class-name, turn it into a METHOD_TYPE, unless
10493 we know that the function is static. We take advantage of this
10494 opportunity to do other processing that pertains to entities
10495 explicitly declared to be class members. Note that if DECLARATOR
10496 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10497 would not have exited the loop above. */
10499 && declarator
->u
.id
.qualifying_scope
10500 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10502 ctype
= declarator
->u
.id
.qualifying_scope
;
10503 ctype
= TYPE_MAIN_VARIANT (ctype
);
10504 template_count
= num_template_headers_for_class (ctype
);
10506 if (ctype
== current_class_type
)
10510 permerror (input_location
, "member functions are implicitly friends of their class");
10514 permerror (declarator
->id_loc
,
10515 "extra qualification %<%T::%> on member %qs",
10518 else if (/* If the qualifying type is already complete, then we
10519 can skip the following checks. */
10520 !COMPLETE_TYPE_P (ctype
)
10521 && (/* If the function is being defined, then
10522 qualifying type must certainly be complete. */
10524 /* A friend declaration of "T::f" is OK, even if
10525 "T" is a template parameter. But, if this
10526 function is not a friend, the qualifying type
10527 must be a class. */
10528 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10529 /* For a declaration, the type need not be
10530 complete, if either it is dependent (since there
10531 is no meaningful definition of complete in that
10532 case) or the qualifying class is currently being
10534 || !(dependent_type_p (ctype
)
10535 || currently_open_class (ctype
)))
10536 /* Check that the qualifying type is complete. */
10537 && !complete_type_or_else (ctype
, NULL_TREE
))
10538 return error_mark_node
;
10539 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10541 if (current_class_type
10542 && (!friendp
|| funcdef_flag
))
10544 error (funcdef_flag
10545 ? G_("cannot define member function %<%T::%s%> "
10547 : G_("cannot declare member function %<%T::%s%> "
10549 ctype
, name
, current_class_type
);
10550 return error_mark_node
;
10553 else if (typedef_p
&& current_class_type
)
10555 error ("cannot declare member %<%T::%s%> within %qT",
10556 ctype
, name
, current_class_type
);
10557 return error_mark_node
;
10561 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10562 ctype
= current_class_type
;
10564 /* Now TYPE has the actual type. */
10566 if (returned_attrs
)
10569 *attrlist
= chainon (returned_attrs
, *attrlist
);
10571 attrlist
= &returned_attrs
;
10575 && declarator
->kind
== cdk_id
10576 && declarator
->std_attributes
)
10577 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10578 a declarator-id appertains to the entity that is declared. */
10579 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10581 /* Handle parameter packs. */
10582 if (parameter_pack_p
)
10584 if (decl_context
== PARM
)
10585 /* Turn the type into a pack expansion.*/
10586 type
= make_pack_expansion (type
);
10588 error ("non-parameter %qs cannot be a parameter pack", name
);
10591 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10592 && !processing_template_decl
10593 && variably_modified_type_p (type
, NULL_TREE
))
10595 if (decl_context
== FIELD
)
10596 error ("data member may not have variably modified type %qT", type
);
10598 error ("parameter may not have variably modified type %qT", type
);
10599 type
= error_mark_node
;
10602 if (explicitp
== 1 || (explicitp
&& friendp
))
10604 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10605 in the declaration of a constructor or conversion function within
10606 a class definition. */
10607 if (!current_class_type
)
10608 error_at (declspecs
->locations
[ds_explicit
],
10609 "%<explicit%> outside class declaration");
10611 error_at (declspecs
->locations
[ds_explicit
],
10612 "%<explicit%> in friend declaration");
10614 error_at (declspecs
->locations
[ds_explicit
],
10615 "only declarations of constructors and conversion operators "
10616 "can be %<explicit%>");
10620 if (storage_class
== sc_mutable
)
10622 if (decl_context
!= FIELD
|| friendp
)
10624 error ("non-member %qs cannot be declared %<mutable%>", name
);
10625 storage_class
= sc_none
;
10627 else if (decl_context
== TYPENAME
|| typedef_p
)
10629 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10630 storage_class
= sc_none
;
10632 else if (TREE_CODE (type
) == FUNCTION_TYPE
10633 || TREE_CODE (type
) == METHOD_TYPE
)
10635 error ("function %qs cannot be declared %<mutable%>", name
);
10636 storage_class
= sc_none
;
10640 error ("static %qs cannot be declared %<mutable%>", name
);
10641 storage_class
= sc_none
;
10643 else if (type_quals
& TYPE_QUAL_CONST
)
10645 error ("const %qs cannot be declared %<mutable%>", name
);
10646 storage_class
= sc_none
;
10648 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10650 permerror (input_location
, "reference %qs cannot be declared "
10651 "%<mutable%>", name
);
10652 storage_class
= sc_none
;
10656 /* If this is declaring a typedef name, return a TYPE_DECL. */
10657 if (typedef_p
&& decl_context
!= TYPENAME
)
10661 /* Note that the grammar rejects storage classes
10662 in typenames, fields or parameters. */
10663 if (current_lang_name
== lang_name_java
)
10664 TYPE_FOR_JAVA (type
) = 1;
10666 /* This declaration:
10668 typedef void f(int) const;
10670 declares a function type which is not a member of any
10671 particular class, but which is cv-qualified; for
10672 example "f S::*" declares a pointer to a const-qualified
10673 member function of S. We record the cv-qualification in the
10675 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10677 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10679 /* We have now dealt with these qualifiers. */
10680 memfn_quals
= TYPE_UNQUALIFIED
;
10681 rqual
= REF_QUAL_NONE
;
10684 if (type_uses_auto (type
))
10686 error ("typedef declared %<auto%>");
10687 type
= error_mark_node
;
10691 error_at (location_of (reqs
), "requires-clause on typedef");
10693 if (decl_context
== FIELD
)
10694 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10696 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10697 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10698 error_at (DECL_SOURCE_LOCATION (decl
),
10699 "typedef name may not be a nested-name-specifier");
10700 TREE_TYPE (decl
) = error_mark_node
;
10703 if (decl_context
!= FIELD
)
10705 if (!current_function_decl
)
10706 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10707 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10708 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10709 (current_function_decl
)))
10710 /* The TYPE_DECL is "abstract" because there will be
10711 clones of this constructor/destructor, and there will
10712 be copies of this TYPE_DECL generated in those
10713 clones. The decloning optimization (for space) may
10714 revert this subsequently if it determines that
10715 the clones should share a common implementation. */
10716 DECL_ABSTRACT_P (decl
) = true;
10718 else if (current_class_type
10719 && constructor_name_p (unqualified_id
, current_class_type
))
10720 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10721 "as enclosing class",
10724 /* If the user declares "typedef struct {...} foo" then the
10725 struct will have an anonymous name. Fill that name in now.
10726 Nothing can refer to it, so nothing needs know about the name
10728 if (type
!= error_mark_node
10730 && TYPE_NAME (type
)
10731 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10732 && TYPE_ANONYMOUS_P (type
)
10733 && declspecs
->type_definition_p
10734 && attributes_naming_typedef_ok (*attrlist
)
10735 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10739 /* Replace the anonymous name with the real name everywhere. */
10740 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10742 if (anon_aggrname_p (TYPE_IDENTIFIER (t
)))
10743 /* We do not rename the debug info representing the
10744 anonymous tagged type because the standard says in
10745 [dcl.typedef] that the naming applies only for
10746 linkage purposes. */
10747 /*debug_hooks->set_name (t, decl);*/
10748 TYPE_NAME (t
) = decl
;
10751 if (TYPE_LANG_SPECIFIC (type
))
10752 TYPE_WAS_ANONYMOUS (type
) = 1;
10754 /* If this is a typedef within a template class, the nested
10755 type is a (non-primary) template. The name for the
10756 template needs updating as well. */
10757 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10758 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10759 = TYPE_IDENTIFIER (type
);
10761 /* Adjust linkage now that we aren't anonymous anymore. */
10762 reset_type_linkage (type
);
10764 /* FIXME remangle member functions; member functions of a
10765 type with external linkage have external linkage. */
10769 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10770 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10772 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10773 memfn_quals
!= TYPE_UNQUALIFIED
,
10774 inlinep
, friendp
, raises
!= NULL_TREE
);
10776 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10777 /* Acknowledge that this was written:
10778 `using analias = atype;'. */
10779 TYPE_DECL_ALIAS_P (decl
) = 1;
10784 /* Detect the case of an array type of unspecified size
10785 which came, as such, direct from a typedef name.
10786 We must copy the type, so that the array's domain can be
10787 individually set by the object's initializer. */
10789 if (type
&& typedef_type
10790 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10791 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10792 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10794 /* Detect where we're using a typedef of function type to declare a
10795 function. PARMS will not be set, so we must create it now. */
10797 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10799 tree decls
= NULL_TREE
;
10802 for (args
= TYPE_ARG_TYPES (type
);
10803 args
&& args
!= void_list_node
;
10804 args
= TREE_CHAIN (args
))
10806 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10808 DECL_CHAIN (decl
) = decls
;
10812 parms
= nreverse (decls
);
10814 if (decl_context
!= TYPENAME
)
10816 /* The qualifiers on the function type become the qualifiers on
10817 the non-static member function. */
10818 memfn_quals
|= type_memfn_quals (type
);
10819 rqual
= type_memfn_rqual (type
);
10820 type_quals
= TYPE_UNQUALIFIED
;
10824 /* If this is a type name (such as, in a cast or sizeof),
10825 compute the type and return it now. */
10827 if (decl_context
== TYPENAME
)
10829 /* Note that here we don't care about type_quals. */
10831 /* Special case: "friend class foo" looks like a TYPENAME context. */
10836 error ("%<inline%> specified for friend class declaration");
10842 /* Don't allow friend declaration without a class-key. */
10843 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10844 permerror (input_location
, "template parameters cannot be friends");
10845 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10846 permerror (input_location
, "friend declaration requires class-key, "
10847 "i.e. %<friend class %T::%D%>",
10848 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10850 permerror (input_location
, "friend declaration requires class-key, "
10851 "i.e. %<friend %#T%>",
10855 /* Only try to do this stuff if we didn't already give up. */
10856 if (type
!= integer_type_node
)
10858 /* A friendly class? */
10859 if (current_class_type
)
10860 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10861 /*complain=*/true);
10863 error ("trying to make class %qT a friend of global scope",
10866 type
= void_type_node
;
10869 else if (memfn_quals
|| rqual
)
10871 if (ctype
== NULL_TREE
10872 && TREE_CODE (type
) == METHOD_TYPE
)
10873 ctype
= TYPE_METHOD_BASETYPE (type
);
10876 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10877 /* Core issue #547: need to allow this in template type args.
10878 Allow it in general in C++11 for alias-declarations. */
10879 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10880 && TREE_CODE (type
) == FUNCTION_TYPE
)
10881 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10883 error ("invalid qualifiers on non-member function type");
10887 error_at (location_of (reqs
), "requires-clause on type-id");
10891 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10892 && decl_context
!= CATCHPARM
10893 && TREE_CODE (type
) != UNION_TYPE
10896 error ("abstract declarator %qT used as declaration", type
);
10897 return error_mark_node
;
10900 /* Only functions may be declared using an operator-function-id. */
10902 && IDENTIFIER_OPNAME_P (unqualified_id
)
10903 && TREE_CODE (type
) != FUNCTION_TYPE
10904 && TREE_CODE (type
) != METHOD_TYPE
)
10906 error ("declaration of %qD as non-function", unqualified_id
);
10907 return error_mark_node
;
10911 && TREE_CODE (type
) != FUNCTION_TYPE
10912 && TREE_CODE (type
) != METHOD_TYPE
)
10913 error_at (location_of (reqs
),
10914 "requires-clause on declaration of non-function type %qT",
10917 /* We don't check parameter types here because we can emit a better
10918 error message later. */
10919 if (decl_context
!= PARM
)
10921 type
= check_var_type (unqualified_id
, type
);
10922 if (type
== error_mark_node
)
10923 return error_mark_node
;
10926 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10927 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10929 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10931 if (ctype
|| in_namespace
)
10932 error ("cannot use %<::%> in parameter declaration");
10934 if (type_uses_auto (type
))
10936 if (cxx_dialect
>= cxx14
)
10937 error ("%<auto%> parameter not permitted in this context");
10939 error ("parameter declared %<auto%>");
10940 type
= error_mark_node
;
10943 /* A parameter declared as an array of T is really a pointer to T.
10944 One declared as a function is really a pointer to a function.
10945 One declared as a member is really a pointer to member. */
10947 if (TREE_CODE (type
) == ARRAY_TYPE
)
10949 /* Transfer const-ness of array into that of type pointed to. */
10950 type
= build_pointer_type (TREE_TYPE (type
));
10951 type_quals
= TYPE_UNQUALIFIED
;
10952 array_parameter_p
= true;
10954 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10955 type
= build_pointer_type (type
);
10958 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10959 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10961 cp_cv_quals real_quals
= memfn_quals
;
10962 if (cxx_dialect
< cxx14
&& constexpr_p
10963 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10964 real_quals
|= TYPE_QUAL_CONST
;
10965 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10969 tree decl
= NULL_TREE
;
10971 if (decl_context
== PARM
)
10973 decl
= cp_build_parm_decl (unqualified_id
, type
);
10974 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10976 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10977 memfn_quals
!= TYPE_UNQUALIFIED
,
10978 inlinep
, friendp
, raises
!= NULL_TREE
);
10980 else if (decl_context
== FIELD
)
10982 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10983 && type_uses_auto (type
))
10985 error ("non-static data member declared %<auto%>");
10986 type
= error_mark_node
;
10989 /* The C99 flexible array extension. */
10990 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10991 && TYPE_DOMAIN (type
) == NULL_TREE
)
10994 && (TREE_CODE (ctype
) == UNION_TYPE
10995 || TREE_CODE (ctype
) == QUAL_UNION_TYPE
))
10997 error ("flexible array member in union");
10998 type
= error_mark_node
;
11002 /* Flexible array member has a null domain. */
11003 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
11007 if (type
== error_mark_node
)
11009 /* Happens when declaring arrays of sizes which
11010 are error_mark_node, for example. */
11013 else if (in_namespace
&& !friendp
)
11015 /* Something like struct S { int N::j; }; */
11016 error ("invalid use of %<::%>");
11017 return error_mark_node
;
11019 else if (TREE_CODE (type
) == FUNCTION_TYPE
11020 || TREE_CODE (type
) == METHOD_TYPE
)
11023 tree function_context
;
11027 /* This should never happen in pure C++ (the check
11028 could be an assert). It could happen in
11029 Objective-C++ if someone writes invalid code that
11030 uses a function declaration for an instance
11031 variable or property (instance variables and
11032 properties are parsed as FIELD_DECLs, but they are
11033 part of an Objective-C class, not a C++ class).
11034 That code is invalid and is caught by this
11038 error ("declaration of function %qD in invalid context",
11040 return error_mark_node
;
11043 /* ``A union may [ ... ] not [ have ] virtual functions.''
11045 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
11047 error ("function %qD declared %<virtual%> inside a union",
11049 return error_mark_node
;
11052 if (NEW_DELETE_OPNAME_P (unqualified_id
))
11056 error ("%qD cannot be declared %<virtual%>, since it "
11057 "is always static",
11064 /* Check that the name used for a destructor makes sense. */
11065 if (sfk
== sfk_destructor
)
11067 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
11071 gcc_assert (friendp
);
11072 error ("expected qualified name in friend declaration "
11073 "for destructor %qD", uqname
);
11074 return error_mark_node
;
11077 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
11079 error ("declaration of %qD as member of %qT",
11081 return error_mark_node
;
11085 error ("a destructor cannot be %<concept%>");
11086 return error_mark_node
;
11090 error ("a destructor cannot be %<constexpr%>");
11091 return error_mark_node
;
11094 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
11096 error ("expected qualified name in friend declaration "
11097 "for constructor %qD",
11098 id_declarator
->u
.id
.unqualified_name
);
11099 return error_mark_node
;
11101 if (sfk
== sfk_constructor
)
11104 error ("a constructor cannot be %<concept%>");
11105 return error_mark_node
;
11109 error ("a concept cannot be a member function");
11113 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
11115 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
11116 if (variable_template_p (tmpl
))
11118 error ("specialization of variable template %qD "
11119 "declared as function", tmpl
);
11120 inform (DECL_SOURCE_LOCATION (tmpl
),
11121 "variable template declared here");
11122 return error_mark_node
;
11126 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11127 function_context
= (ctype
!= NULL_TREE
) ?
11128 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
11129 publicp
= (! friendp
|| ! staticp
)
11130 && function_context
== NULL_TREE
;
11132 if (late_return_type_p
)
11133 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11135 decl
= grokfndecl (ctype
, type
,
11136 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
11137 ? unqualified_id
: dname
,
11141 virtualp
, flags
, memfn_quals
, rqual
, raises
,
11142 friendp
? -1 : 0, friendp
, publicp
,
11143 inlinep
| (2 * constexpr_p
) | (4 * concept_p
),
11144 initialized
== SD_DELETED
, sfk
,
11145 funcdef_flag
, template_count
, in_namespace
,
11146 attrlist
, declarator
->id_loc
);
11147 decl
= set_virt_specifiers (decl
, virt_specifiers
);
11148 if (decl
== NULL_TREE
)
11149 return error_mark_node
;
11151 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11152 /* The decl and setting of decl_attr is also turned off. */
11153 decl
= build_decl_attribute_variant (decl
, decl_attr
);
11156 /* [class.conv.ctor]
11158 A constructor declared without the function-specifier
11159 explicit that can be called with a single parameter
11160 specifies a conversion from the type of its first
11161 parameter to the type of its class. Such a constructor
11162 is called a converting constructor. */
11163 if (explicitp
== 2)
11164 DECL_NONCONVERTING_P (decl
) = 1;
11166 else if (!staticp
&& !dependent_type_p (type
)
11167 && !COMPLETE_TYPE_P (complete_type (type
))
11168 && (TREE_CODE (type
) != ARRAY_TYPE
11169 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
11170 || initialized
== 0))
11172 if (TREE_CODE (type
) != ARRAY_TYPE
11173 || !COMPLETE_TYPE_P (TREE_TYPE (type
)))
11175 if (unqualified_id
)
11177 error ("field %qD has incomplete type %qT",
11178 unqualified_id
, type
);
11179 cxx_incomplete_type_inform (strip_array_types (type
));
11182 error ("name %qT has incomplete type", type
);
11184 type
= error_mark_node
;
11192 error ("%qE is neither function nor member function; "
11193 "cannot be declared friend", unqualified_id
);
11201 /* Friends are treated specially. */
11202 if (ctype
== current_class_type
)
11203 ; /* We already issued a permerror. */
11204 else if (decl
&& DECL_NAME (decl
))
11206 if (template_class_depth (current_class_type
) == 0)
11208 decl
= check_explicit_specialization
11209 (unqualified_id
, decl
, template_count
,
11210 2 * funcdef_flag
+ 4);
11211 if (decl
== error_mark_node
)
11212 return error_mark_node
;
11215 decl
= do_friend (ctype
, unqualified_id
, decl
,
11221 return error_mark_node
;
11224 /* Structure field. It may not be a function, except for C++. */
11226 if (decl
== NULL_TREE
)
11230 /* C++ allows static class members. All other work
11231 for this is done by grokfield. */
11232 decl
= build_lang_decl_loc (declarator
11233 ? declarator
->id_loc
11235 VAR_DECL
, unqualified_id
, type
);
11236 set_linkage_for_static_data_member (decl
);
11237 /* Even if there is an in-class initialization, DECL
11238 is considered undefined until an out-of-class
11239 definition is provided. */
11240 DECL_EXTERNAL (decl
) = 1;
11244 CP_DECL_THREAD_LOCAL_P (decl
) = true;
11245 if (!processing_template_decl
)
11246 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
11247 if (declspecs
->gnu_thread_keyword_p
)
11248 SET_DECL_GNU_TLS_P (decl
);
11251 error ("static data member %qE declared %<concept%>",
11253 else if (constexpr_p
&& !initialized
)
11255 error ("constexpr static data member %qD must have an "
11256 "initializer", decl
);
11257 constexpr_p
= false;
11263 error ("non-static data member %qE declared %<concept%>",
11265 else if (constexpr_p
)
11267 error ("non-static data member %qE declared %<constexpr%>",
11269 constexpr_p
= false;
11271 decl
= build_decl (input_location
,
11272 FIELD_DECL
, unqualified_id
, type
);
11273 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
11274 if (bitfield
&& !unqualified_id
)
11275 TREE_NO_WARNING (decl
) = 1;
11277 if (storage_class
== sc_mutable
)
11279 DECL_MUTABLE_P (decl
) = 1;
11280 storage_class
= sc_none
;
11285 /* An attempt is being made to initialize a non-static
11286 member. This is new in C++11. */
11287 maybe_warn_cpp0x (CPP0X_NSDMI
);
11289 /* If this has been parsed with static storage class, but
11290 errors forced staticp to be cleared, ensure NSDMI is
11292 if (declspecs
->storage_class
== sc_static
)
11293 DECL_INITIAL (decl
) = error_mark_node
;
11297 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
11298 memfn_quals
!= TYPE_UNQUALIFIED
,
11299 inlinep
, friendp
, raises
!= NULL_TREE
);
11302 else if (TREE_CODE (type
) == FUNCTION_TYPE
11303 || TREE_CODE (type
) == METHOD_TYPE
)
11305 tree original_name
;
11308 if (!unqualified_id
)
11309 return error_mark_node
;
11311 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
11312 original_name
= dname
;
11314 original_name
= unqualified_id
;
11316 if (storage_class
== sc_auto
)
11317 error ("storage class %<auto%> invalid for function %qs", name
);
11318 else if (storage_class
== sc_register
)
11319 error ("storage class %<register%> invalid for function %qs", name
);
11322 if (declspecs
->gnu_thread_keyword_p
)
11323 error ("storage class %<__thread%> invalid for function %qs",
11326 error ("storage class %<thread_local%> invalid for function %qs",
11330 if (virt_specifiers
)
11331 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
11332 /* Function declaration not at top level.
11333 Storage classes other than `extern' are not allowed
11334 and `extern' makes no difference. */
11335 if (! toplevel_bindings_p ()
11336 && (storage_class
== sc_static
11337 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
11340 if (storage_class
== sc_static
)
11341 pedwarn (input_location
, OPT_Wpedantic
,
11342 "%<static%> specified invalid for function %qs "
11343 "declared out of global scope", name
);
11345 pedwarn (input_location
, OPT_Wpedantic
,
11346 "%<inline%> specifier invalid for function %qs "
11347 "declared out of global scope", name
);
11350 if (ctype
== NULL_TREE
)
11354 error ("virtual non-class function %qs", name
);
11357 else if (sfk
== sfk_constructor
11358 || sfk
== sfk_destructor
)
11360 error (funcdef_flag
11361 ? G_("%qs defined in a non-class scope")
11362 : G_("%qs declared in a non-class scope"), name
);
11367 /* Record whether the function is public. */
11368 publicp
= (ctype
!= NULL_TREE
11369 || storage_class
!= sc_static
);
11371 if (late_return_type_p
)
11372 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11374 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
11375 reqs
, virtualp
, flags
, memfn_quals
, rqual
, raises
,
11378 inlinep
| (2 * constexpr_p
) | (4 * concept_p
),
11379 initialized
== SD_DELETED
,
11382 template_count
, in_namespace
, attrlist
,
11383 declarator
->id_loc
);
11384 if (decl
== NULL_TREE
)
11385 return error_mark_node
;
11389 int invalid_static
= 0;
11391 /* Don't allow a static member function in a class, and forbid
11392 declaring main to be static. */
11393 if (TREE_CODE (type
) == METHOD_TYPE
)
11395 permerror (input_location
, "cannot declare member function %qD to have "
11396 "static linkage", decl
);
11397 invalid_static
= 1;
11399 else if (current_function_decl
)
11401 /* 7.1.1: There can be no static function declarations within a
11403 error ("cannot declare static function inside another function");
11404 invalid_static
= 1;
11407 if (invalid_static
)
11410 storage_class
= sc_none
;
11416 /* It's a variable. */
11418 /* An uninitialized decl with `extern' is a reference. */
11419 decl
= grokvardecl (type
, dname
, unqualified_id
,
11422 ((type_quals
& TYPE_QUAL_CONST
) != 0) | (2 * concept_p
),
11424 ctype
? ctype
: in_namespace
);
11425 if (decl
== NULL_TREE
)
11426 return error_mark_node
;
11428 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11429 memfn_quals
!= TYPE_UNQUALIFIED
,
11430 inlinep
, friendp
, raises
!= NULL_TREE
);
11434 DECL_CONTEXT (decl
) = ctype
;
11437 permerror (input_location
, "%<static%> may not be used when defining "
11438 "(as opposed to declaring) a static data member");
11440 storage_class
= sc_none
;
11442 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11444 error ("static member %qD declared %<register%>", decl
);
11445 storage_class
= sc_none
;
11447 if (storage_class
== sc_extern
&& pedantic
)
11449 pedwarn (input_location
, OPT_Wpedantic
,
11450 "cannot explicitly declare member %q#D to have "
11451 "extern linkage", decl
);
11452 storage_class
= sc_none
;
11455 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11457 error ("declaration of constexpr variable %qD is not a definition",
11459 constexpr_p
= false;
11463 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11465 if (toplevel_bindings_p ())
11467 /* It's common practice (and completely valid) to have a const
11468 be initialized and declared extern. */
11469 if (!(type_quals
& TYPE_QUAL_CONST
))
11470 warning (0, "%qs initialized and declared %<extern%>", name
);
11474 error ("%qs has both %<extern%> and initializer", name
);
11475 return error_mark_node
;
11479 /* Record `register' declaration for warnings on &
11480 and in case doing stupid register allocation. */
11482 if (storage_class
== sc_register
)
11483 DECL_REGISTER (decl
) = 1;
11484 else if (storage_class
== sc_extern
)
11485 DECL_THIS_EXTERN (decl
) = 1;
11486 else if (storage_class
== sc_static
)
11487 DECL_THIS_STATIC (decl
) = 1;
11489 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11490 if (constexpr_p
&& VAR_P (decl
))
11491 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11493 /* Record constancy and volatility on the DECL itself . There's
11494 no need to do this when processing a template; we'll do this
11495 for the instantiated declaration based on the type of DECL. */
11496 if (!processing_template_decl
)
11497 cp_apply_type_quals_to_decl (type_quals
, decl
);
11503 /* Subroutine of start_function. Ensure that each of the parameter
11504 types (as listed in PARMS) is complete, as is required for a
11505 function definition. */
11508 require_complete_types_for_parms (tree parms
)
11510 for (; parms
; parms
= DECL_CHAIN (parms
))
11512 if (dependent_type_p (TREE_TYPE (parms
)))
11514 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11515 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11517 relayout_decl (parms
);
11518 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11521 /* grokparms or complete_type_or_else will have already issued
11523 TREE_TYPE (parms
) = error_mark_node
;
11527 /* Returns nonzero if T is a local variable. */
11530 local_variable_p (const_tree t
)
11533 /* A VAR_DECL with a context that is a _TYPE is a static data
11535 && !TYPE_P (CP_DECL_CONTEXT (t
))
11536 /* Any other non-local variable must be at namespace scope. */
11537 && !DECL_NAMESPACE_SCOPE_P (t
))
11538 || (TREE_CODE (t
) == PARM_DECL
))
11544 /* Like local_variable_p, but suitable for use as a tree-walking
11548 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11551 if (local_variable_p (*tp
)
11552 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11554 else if (TYPE_P (*tp
))
11555 *walk_subtrees
= 0;
11560 /* Check that ARG, which is a default-argument expression for a
11561 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11562 something goes wrong. DECL may also be a _TYPE node, rather than a
11563 DECL, if there is no DECL available. */
11566 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11571 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11572 /* We get a DEFAULT_ARG when looking at an in-class declaration
11573 with a default argument. Ignore the argument for now; we'll
11574 deal with it after the class is complete. */
11583 decl_type
= TREE_TYPE (decl
);
11585 if (arg
== error_mark_node
11586 || decl
== error_mark_node
11587 || TREE_TYPE (arg
) == error_mark_node
11588 || decl_type
== error_mark_node
)
11589 /* Something already went wrong. There's no need to check
11591 return error_mark_node
;
11593 /* [dcl.fct.default]
11595 A default argument expression is implicitly converted to the
11597 ++cp_unevaluated_operand
;
11598 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11600 --cp_unevaluated_operand
;
11602 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11604 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11605 && null_ptr_cst_p (arg
))
11606 return nullptr_node
;
11608 /* [dcl.fct.default]
11610 Local variables shall not be used in default argument
11613 The keyword `this' shall not be used in a default argument of a
11614 member function. */
11615 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11618 if (complain
& tf_warning_or_error
)
11620 if (DECL_NAME (var
) == this_identifier
)
11621 permerror (input_location
, "default argument %qE uses %qD",
11624 error ("default argument %qE uses local variable %qD", arg
, var
);
11626 return error_mark_node
;
11633 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11636 type_is_deprecated (tree type
)
11638 enum tree_code code
;
11639 if (TREE_DEPRECATED (type
))
11641 if (TYPE_NAME (type
))
11643 if (TREE_DEPRECATED (TYPE_NAME (type
)))
11649 /* Do warn about using typedefs to a deprecated class. */
11650 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11651 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11653 code
= TREE_CODE (type
);
11655 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11656 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11657 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11658 return type_is_deprecated (TREE_TYPE (type
));
11660 if (TYPE_PTRMEMFUNC_P (type
))
11661 return type_is_deprecated
11662 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11667 /* Decode the list of parameter types for a function type.
11668 Given the list of things declared inside the parens,
11669 return a list of types.
11671 If this parameter does not end with an ellipsis, we append
11674 *PARMS is set to the chain of PARM_DECLs created. */
11677 grokparms (tree parmlist
, tree
*parms
)
11679 tree result
= NULL_TREE
;
11680 tree decls
= NULL_TREE
;
11684 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11686 tree type
= NULL_TREE
;
11687 tree init
= TREE_PURPOSE (parm
);
11688 tree decl
= TREE_VALUE (parm
);
11690 if (parm
== void_list_node
)
11693 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11696 type
= TREE_TYPE (decl
);
11697 if (VOID_TYPE_P (type
))
11699 if (same_type_p (type
, void_type_node
)
11701 && !DECL_NAME (decl
) && !result
11702 && TREE_CHAIN (parm
) == void_list_node
)
11703 /* DR 577: A parameter list consisting of a single
11704 unnamed parameter of non-dependent type 'void'. */
11706 else if (cv_qualified_p (type
))
11707 error_at (DECL_SOURCE_LOCATION (decl
),
11708 "invalid use of cv-qualified type %qT in "
11709 "parameter declaration", type
);
11711 error_at (DECL_SOURCE_LOCATION (decl
),
11712 "invalid use of type %<void%> in parameter "
11714 /* It's not a good idea to actually create parameters of
11715 type `void'; other parts of the compiler assume that a
11716 void type terminates the parameter list. */
11717 type
= error_mark_node
;
11718 TREE_TYPE (decl
) = error_mark_node
;
11721 if (type
!= error_mark_node
11722 && TYPE_FOR_JAVA (type
)
11723 && MAYBE_CLASS_TYPE_P (type
))
11725 error ("parameter %qD has Java class type", decl
);
11726 type
= error_mark_node
;
11727 TREE_TYPE (decl
) = error_mark_node
;
11731 if (type
!= error_mark_node
)
11733 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11735 tree deptype
= type_is_deprecated (type
);
11737 warn_deprecated_use (deptype
, NULL_TREE
);
11740 /* Top-level qualifiers on the parameters are
11741 ignored for function types. */
11742 type
= cp_build_qualified_type (type
, 0);
11743 if (TREE_CODE (type
) == METHOD_TYPE
)
11745 error ("parameter %qD invalidly declared method type", decl
);
11746 type
= build_pointer_type (type
);
11747 TREE_TYPE (decl
) = type
;
11749 else if (abstract_virtuals_error (decl
, type
))
11750 any_error
= 1; /* Seems like a good idea. */
11751 else if (POINTER_TYPE_P (type
))
11753 /* [dcl.fct]/6, parameter types cannot contain pointers
11754 (references) to arrays of unknown bound. */
11755 tree t
= TREE_TYPE (type
);
11756 int ptr
= TYPE_PTR_P (type
);
11760 if (TYPE_PTR_P (t
))
11762 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11764 else if (!TYPE_DOMAIN (t
))
11768 if (TREE_CODE (t
) == ARRAY_TYPE
)
11770 ? G_("parameter %qD includes pointer to array of "
11771 "unknown bound %qT")
11772 : G_("parameter %qD includes reference to array of "
11773 "unknown bound %qT"),
11779 else if (init
&& !processing_template_decl
)
11780 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11783 DECL_CHAIN (decl
) = decls
;
11785 result
= tree_cons (init
, type
, result
);
11787 decls
= nreverse (decls
);
11788 result
= nreverse (result
);
11790 result
= chainon (result
, void_list_node
);
11797 /* D is a constructor or overloaded `operator='.
11799 Let T be the class in which D is declared. Then, this function
11802 -1 if D's is an ill-formed constructor or copy assignment operator
11803 whose first parameter is of type `T'.
11804 0 if D is not a copy constructor or copy assignment
11806 1 if D is a copy constructor or copy assignment operator whose
11807 first parameter is a reference to non-const qualified T.
11808 2 if D is a copy constructor or copy assignment operator whose
11809 first parameter is a reference to const qualified T.
11811 This function can be used as a predicate. Positive values indicate
11812 a copy constructor and nonzero values indicate a copy assignment
11816 copy_fn_p (const_tree d
)
11822 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11824 if (TREE_CODE (d
) == TEMPLATE_DECL
11825 || (DECL_TEMPLATE_INFO (d
)
11826 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11827 /* Instantiations of template member functions are never copy
11828 functions. Note that member functions of templated classes are
11829 represented as template functions internally, and we must
11830 accept those as copy functions. */
11833 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11837 arg_type
= TREE_VALUE (args
);
11838 if (arg_type
== error_mark_node
)
11841 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11843 /* Pass by value copy assignment operator. */
11846 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11847 && !TYPE_REF_IS_RVALUE (arg_type
)
11848 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11850 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11856 args
= TREE_CHAIN (args
);
11858 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11859 /* There are more non-optional args. */
11865 /* D is a constructor or overloaded `operator='.
11867 Let T be the class in which D is declared. Then, this function
11868 returns true when D is a move constructor or move assignment
11869 operator, false otherwise. */
11872 move_fn_p (const_tree d
)
11874 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11876 if (cxx_dialect
== cxx98
)
11877 /* There are no move constructors if we are in C++98 mode. */
11880 if (TREE_CODE (d
) == TEMPLATE_DECL
11881 || (DECL_TEMPLATE_INFO (d
)
11882 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11883 /* Instantiations of template member functions are never move
11884 functions. Note that member functions of templated classes are
11885 represented as template functions internally, and we must
11886 accept those as move functions. */
11889 return move_signature_fn_p (d
);
11892 /* D is a constructor or overloaded `operator='.
11894 Then, this function returns true when D has the same signature as a move
11895 constructor or move assignment operator (because either it is such a
11896 ctor/op= or it is a template specialization with the same signature),
11897 false otherwise. */
11900 move_signature_fn_p (const_tree d
)
11904 bool result
= false;
11906 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11910 arg_type
= TREE_VALUE (args
);
11911 if (arg_type
== error_mark_node
)
11914 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11915 && TYPE_REF_IS_RVALUE (arg_type
)
11916 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11920 args
= TREE_CHAIN (args
);
11922 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11923 /* There are more non-optional args. */
11929 /* Remember any special properties of member function DECL. */
11932 grok_special_member_properties (tree decl
)
11936 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11939 class_type
= DECL_CONTEXT (decl
);
11940 if (DECL_CONSTRUCTOR_P (decl
))
11942 int ctor
= copy_fn_p (decl
);
11944 if (!DECL_ARTIFICIAL (decl
))
11945 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11951 A non-template constructor for class X is a copy
11952 constructor if its first parameter is of type X&, const
11953 X&, volatile X& or const volatile X&, and either there
11954 are no other parameters or else all other parameters have
11955 default arguments. */
11956 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11957 if (user_provided_p (decl
))
11958 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11960 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11962 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11963 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11964 else if (move_fn_p (decl
) && user_provided_p (decl
))
11965 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11966 else if (is_list_ctor (decl
))
11967 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11969 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11970 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11971 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11973 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11977 A non-template assignment operator for class X is a copy
11978 assignment operator if its parameter is of type X, X&, const
11979 X&, volatile X& or const volatile X&. */
11981 int assop
= copy_fn_p (decl
);
11985 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11986 if (user_provided_p (decl
))
11987 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11989 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11991 else if (move_fn_p (decl
) && user_provided_p (decl
))
11992 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11994 /* Destructors are handled in check_methods. */
11997 /* Check a constructor DECL has the correct form. Complains
11998 if the class has a constructor of the form X(X). */
12001 grok_ctor_properties (const_tree ctype
, const_tree decl
)
12003 int ctor_parm
= copy_fn_p (decl
);
12009 A declaration of a constructor for a class X is ill-formed if
12010 its first parameter is of type (optionally cv-qualified) X
12011 and either there are no other parameters or else all other
12012 parameters have default arguments.
12014 We *don't* complain about member template instantiations that
12015 have this form, though; they can occur as we try to decide
12016 what constructor to use during overload resolution. Since
12017 overload resolution will never prefer such a constructor to
12018 the non-template copy constructor (which is either explicitly
12019 or implicitly defined), there's no need to worry about their
12020 existence. Theoretically, they should never even be
12021 instantiated, but that's hard to forestall. */
12022 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
12030 /* An operator with this code is unary, but can also be binary. */
12033 ambi_op_p (enum tree_code code
)
12035 return (code
== INDIRECT_REF
12036 || code
== ADDR_EXPR
12037 || code
== UNARY_PLUS_EXPR
12038 || code
== NEGATE_EXPR
12039 || code
== PREINCREMENT_EXPR
12040 || code
== PREDECREMENT_EXPR
);
12043 /* An operator with this name can only be unary. */
12046 unary_op_p (enum tree_code code
)
12048 return (code
== TRUTH_NOT_EXPR
12049 || code
== BIT_NOT_EXPR
12050 || code
== COMPONENT_REF
12051 || code
== TYPE_EXPR
);
12054 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
12055 errors are issued for invalid declarations. */
12058 grok_op_properties (tree decl
, bool complain
)
12060 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
12062 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
12063 tree name
= DECL_NAME (decl
);
12064 enum tree_code operator_code
;
12069 /* Count the number of arguments and check for ellipsis. */
12070 for (argtype
= argtypes
, arity
= 0;
12071 argtype
&& argtype
!= void_list_node
;
12072 argtype
= TREE_CHAIN (argtype
))
12074 ellipsis_p
= !argtype
;
12076 class_type
= DECL_CONTEXT (decl
);
12077 if (class_type
&& !CLASS_TYPE_P (class_type
))
12078 class_type
= NULL_TREE
;
12080 if (DECL_CONV_FN_P (decl
))
12081 operator_code
= TYPE_EXPR
;
12085 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
12086 if (ansi_opname (CODE) == name) \
12088 operator_code = (CODE); \
12091 else if (ansi_assopname (CODE) == name) \
12093 operator_code = (CODE); \
12094 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
12098 #include "operators.def"
12099 #undef DEF_OPERATOR
12101 gcc_unreachable ();
12104 gcc_assert (operator_code
!= MAX_TREE_CODES
);
12105 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
12108 switch (operator_code
)
12111 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
12115 TYPE_GETS_DELETE (class_type
) |= 1;
12119 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
12122 case VEC_DELETE_EXPR
:
12123 TYPE_GETS_DELETE (class_type
) |= 2;
12130 /* [basic.std.dynamic.allocation]/1:
12132 A program is ill-formed if an allocation function is declared
12133 in a namespace scope other than global scope or declared static
12136 The same also holds true for deallocation functions. */
12137 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
12138 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
12140 if (DECL_NAMESPACE_SCOPE_P (decl
))
12142 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
12144 error ("%qD may not be declared within a namespace", decl
);
12147 else if (!TREE_PUBLIC (decl
))
12149 error ("%qD may not be declared as static", decl
);
12155 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
12157 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
12158 DECL_IS_OPERATOR_NEW (decl
) = 1;
12160 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
12161 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
12164 /* An operator function must either be a non-static member function
12165 or have at least one parameter of a class, a reference to a class,
12166 an enumeration, or a reference to an enumeration. 13.4.0.6 */
12167 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
12169 if (operator_code
== TYPE_EXPR
12170 || operator_code
== CALL_EXPR
12171 || operator_code
== COMPONENT_REF
12172 || operator_code
== ARRAY_REF
12173 || operator_code
== NOP_EXPR
)
12175 error ("%qD must be a nonstatic member function", decl
);
12182 if (DECL_STATIC_FUNCTION_P (decl
))
12184 error ("%qD must be either a non-static member "
12185 "function or a non-member function", decl
);
12189 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
12191 tree arg
= non_reference (TREE_VALUE (p
));
12192 if (arg
== error_mark_node
)
12195 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
12196 because these checks are performed even on
12197 template functions. */
12198 if (MAYBE_CLASS_TYPE_P (arg
)
12199 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
12203 if (!p
|| p
== void_list_node
)
12206 error ("%qD must have an argument of class or "
12207 "enumerated type", decl
);
12213 /* There are no restrictions on the arguments to an overloaded
12215 if (operator_code
== CALL_EXPR
)
12218 /* Warn about conversion operators that will never be used. */
12219 if (IDENTIFIER_TYPENAME_P (name
)
12220 && ! DECL_TEMPLATE_INFO (decl
)
12222 /* Warn only declaring the function; there is no need to
12223 warn again about out-of-class definitions. */
12224 && class_type
== current_class_type
)
12226 tree t
= TREE_TYPE (name
);
12227 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
12230 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
12232 if (VOID_TYPE_P (t
))
12233 warning (OPT_Wconversion
,
12235 ? G_("conversion to a reference to void "
12236 "will never use a type conversion operator")
12237 : G_("conversion to void "
12238 "will never use a type conversion operator"));
12239 else if (class_type
)
12241 if (t
== class_type
)
12242 warning (OPT_Wconversion
,
12244 ? G_("conversion to a reference to the same type "
12245 "will never use a type conversion operator")
12246 : G_("conversion to the same type "
12247 "will never use a type conversion operator"));
12248 /* Don't force t to be complete here. */
12249 else if (MAYBE_CLASS_TYPE_P (t
)
12250 && COMPLETE_TYPE_P (t
)
12251 && DERIVED_FROM_P (t
, class_type
))
12252 warning (OPT_Wconversion
,
12254 ? G_("conversion to a reference to a base class "
12255 "will never use a type conversion operator")
12256 : G_("conversion to a base class "
12257 "will never use a type conversion operator"));
12262 if (operator_code
== COND_EXPR
)
12265 error ("ISO C++ prohibits overloading operator ?:");
12268 else if (ellipsis_p
)
12270 error ("%qD must not have variable number of arguments", decl
);
12273 else if (ambi_op_p (operator_code
))
12276 /* We pick the one-argument operator codes by default, so
12277 we don't have to change anything. */
12279 else if (arity
== 2)
12281 /* If we thought this was a unary operator, we now know
12282 it to be a binary operator. */
12283 switch (operator_code
)
12286 operator_code
= MULT_EXPR
;
12290 operator_code
= BIT_AND_EXPR
;
12293 case UNARY_PLUS_EXPR
:
12294 operator_code
= PLUS_EXPR
;
12298 operator_code
= MINUS_EXPR
;
12301 case PREINCREMENT_EXPR
:
12302 operator_code
= POSTINCREMENT_EXPR
;
12305 case PREDECREMENT_EXPR
:
12306 operator_code
= POSTDECREMENT_EXPR
;
12310 gcc_unreachable ();
12313 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
12315 if ((operator_code
== POSTINCREMENT_EXPR
12316 || operator_code
== POSTDECREMENT_EXPR
)
12317 && ! processing_template_decl
12318 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
12321 error ("postfix %qD must take %<int%> as its argument",
12324 error ("postfix %qD must take %<int%> as its second "
12332 error ("%qD must take either zero or one argument", decl
);
12334 error ("%qD must take either one or two arguments", decl
);
12338 /* More Effective C++ rule 6. */
12340 && (operator_code
== POSTINCREMENT_EXPR
12341 || operator_code
== POSTDECREMENT_EXPR
12342 || operator_code
== PREINCREMENT_EXPR
12343 || operator_code
== PREDECREMENT_EXPR
))
12345 tree arg
= TREE_VALUE (argtypes
);
12346 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
12347 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
12348 arg
= TREE_TYPE (arg
);
12349 arg
= TYPE_MAIN_VARIANT (arg
);
12350 if (operator_code
== PREINCREMENT_EXPR
12351 || operator_code
== PREDECREMENT_EXPR
)
12353 if (TREE_CODE (ret
) != REFERENCE_TYPE
12354 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
12356 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
12357 build_reference_type (arg
));
12361 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
12362 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
12366 else if (unary_op_p (operator_code
))
12371 error ("%qD must take %<void%>", decl
);
12373 error ("%qD must take exactly one argument", decl
);
12377 else /* if (binary_op_p (operator_code)) */
12382 error ("%qD must take exactly one argument", decl
);
12384 error ("%qD must take exactly two arguments", decl
);
12388 /* More Effective C++ rule 7. */
12390 && (operator_code
== TRUTH_ANDIF_EXPR
12391 || operator_code
== TRUTH_ORIF_EXPR
12392 || operator_code
== COMPOUND_EXPR
))
12393 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12397 /* Effective C++ rule 23. */
12400 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12401 && (operator_code
== PLUS_EXPR
12402 || operator_code
== MINUS_EXPR
12403 || operator_code
== TRUNC_DIV_EXPR
12404 || operator_code
== MULT_EXPR
12405 || operator_code
== TRUNC_MOD_EXPR
)
12406 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12407 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12409 /* [over.oper]/8 */
12410 for (; argtypes
&& argtypes
!= void_list_node
;
12411 argtypes
= TREE_CHAIN (argtypes
))
12412 if (TREE_PURPOSE (argtypes
))
12414 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12415 if (operator_code
== POSTINCREMENT_EXPR
12416 || operator_code
== POSTDECREMENT_EXPR
)
12418 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12423 error ("%qD cannot have default arguments", decl
);
12431 /* Return a string giving the keyword associate with CODE. */
12433 static const char *
12434 tag_name (enum tag_types code
)
12446 case typename_type
:
12449 gcc_unreachable ();
12453 /* Name lookup in an elaborated-type-specifier (after the keyword
12454 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12455 elaborated-type-specifier is invalid, issue a diagnostic and return
12456 error_mark_node; otherwise, return the *_TYPE to which it referred.
12457 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12460 check_elaborated_type_specifier (enum tag_types tag_code
,
12462 bool allow_template_p
)
12468 struct S { struct S *p; };
12470 name lookup will find the TYPE_DECL for the implicit "S::S"
12471 typedef. Adjust for that here. */
12472 if (DECL_SELF_REFERENCE_P (decl
))
12473 decl
= TYPE_NAME (TREE_TYPE (decl
));
12475 type
= TREE_TYPE (decl
);
12477 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12478 is false for this case as well. */
12479 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12481 error ("using template type parameter %qT after %qs",
12482 type
, tag_name (tag_code
));
12483 return error_mark_node
;
12485 /* Accept template template parameters. */
12486 else if (allow_template_p
12487 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12488 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12492 If the identifier resolves to a typedef-name or the
12493 simple-template-id resolves to an alias template
12494 specialization, the elaborated-type-specifier is ill-formed.
12496 In other words, the only legitimate declaration to use in the
12497 elaborated type specifier is the implicit typedef created when
12498 the type is declared. */
12499 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12500 && !DECL_SELF_REFERENCE_P (decl
)
12501 && tag_code
!= typename_type
)
12503 if (alias_template_specialization_p (type
))
12504 error ("using alias template specialization %qT after %qs",
12505 type
, tag_name (tag_code
));
12507 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12508 inform (DECL_SOURCE_LOCATION (decl
),
12509 "%qD has a previous declaration here", decl
);
12510 return error_mark_node
;
12512 else if (TREE_CODE (type
) != RECORD_TYPE
12513 && TREE_CODE (type
) != UNION_TYPE
12514 && tag_code
!= enum_type
12515 && tag_code
!= typename_type
)
12517 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12518 inform (input_location
, "%q+T has a previous declaration here", type
);
12519 return error_mark_node
;
12521 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12522 && tag_code
== enum_type
)
12524 error ("%qT referred to as enum", type
);
12525 inform (input_location
, "%q+T has a previous declaration here", type
);
12526 return error_mark_node
;
12528 else if (!allow_template_p
12529 && TREE_CODE (type
) == RECORD_TYPE
12530 && CLASSTYPE_IS_TEMPLATE (type
))
12532 /* If a class template appears as elaborated type specifier
12533 without a template header such as:
12535 template <class T> class C {};
12536 void f(class C); // No template header here
12538 then the required template argument is missing. */
12539 error ("template argument required for %<%s %T%>",
12540 tag_name (tag_code
),
12541 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12542 return error_mark_node
;
12548 /* Lookup NAME in elaborate type specifier in scope according to
12549 SCOPE and issue diagnostics if necessary.
12550 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12551 found, and ERROR_MARK_NODE for type error. */
12554 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12555 tag_scope scope
, bool template_header_p
)
12559 if (scope
== ts_global
)
12561 /* First try ordinary name lookup, ignoring hidden class name
12562 injected via friend declaration. */
12563 decl
= lookup_name_prefer_type (name
, 2);
12564 decl
= strip_using_decl (decl
);
12565 /* If that fails, the name will be placed in the smallest
12566 non-class, non-function-prototype scope according to 3.3.1/5.
12567 We may already have a hidden name declared as friend in this
12568 scope. So lookup again but not ignoring hidden names.
12569 If we find one, that name will be made visible rather than
12570 creating a new tag. */
12572 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12575 decl
= lookup_type_scope (name
, scope
);
12578 && (DECL_CLASS_TEMPLATE_P (decl
)
12579 /* If scope is ts_current we're defining a class, so ignore a
12580 template template parameter. */
12581 || (scope
!= ts_current
12582 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12583 decl
= DECL_TEMPLATE_RESULT (decl
);
12585 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12587 /* Look for invalid nested type:
12591 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12593 error ("%qD has the same name as the class in which it is "
12596 return error_mark_node
;
12599 /* Two cases we need to consider when deciding if a class
12600 template is allowed as an elaborated type specifier:
12601 1. It is a self reference to its own class.
12602 2. It comes with a template header.
12606 template <class T> class C {
12607 class C *c1; // DECL_SELF_REFERENCE_P is true
12610 template <class U> class C; // template_header_p is true
12611 template <class T> class C<T>::D {
12612 class C *c2; // DECL_SELF_REFERENCE_P is true
12615 t
= check_elaborated_type_specifier (tag_code
,
12618 | DECL_SELF_REFERENCE_P (decl
));
12619 if (template_header_p
&& t
&& CLASS_TYPE_P (t
)
12620 && (!CLASSTYPE_TEMPLATE_INFO (t
)
12621 || (!PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))))
12623 error ("%qT is not a template", t
);
12624 inform (location_of (t
), "previous declaration here");
12625 if (TYPE_CLASS_SCOPE_P (t
)
12626 && CLASSTYPE_TEMPLATE_INFO (TYPE_CONTEXT (t
)))
12627 inform (input_location
,
12628 "perhaps you want to explicitly add %<%T::%>",
12630 t
= error_mark_node
;
12635 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12637 error ("reference to %qD is ambiguous", name
);
12638 print_candidates (decl
);
12639 return error_mark_node
;
12645 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12646 Define the tag as a forward-reference if it is not defined.
12648 If a declaration is given, process it here, and report an error if
12649 multiple declarations are not identical.
12651 SCOPE is TS_CURRENT when this is also a definition. Only look in
12652 the current frame for the name (since C++ allows new names in any
12653 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12654 declaration. Only look beginning from the current scope outward up
12655 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12657 TEMPLATE_HEADER_P is true when this declaration is preceded by
12658 a set of template parameters. */
12661 xref_tag_1 (enum tag_types tag_code
, tree name
,
12662 tag_scope orig_scope
, bool template_header_p
)
12664 enum tree_code code
;
12666 tree context
= NULL_TREE
;
12669 gcc_assert (identifier_p (name
));
12675 code
= RECORD_TYPE
;
12681 code
= ENUMERAL_TYPE
;
12684 gcc_unreachable ();
12687 if (orig_scope
== ts_lambda
)
12688 scope
= ts_current
;
12690 scope
= orig_scope
;
12692 /* In case of anonymous name, xref_tag is only called to
12693 make type node and push name. Name lookup is not required. */
12694 if (anon_aggrname_p (name
))
12697 t
= lookup_and_check_tag (tag_code
, name
,
12698 scope
, template_header_p
);
12700 if (t
== error_mark_node
)
12701 return error_mark_node
;
12703 if (scope
!= ts_current
&& t
&& current_class_type
12704 && template_class_depth (current_class_type
)
12705 && template_header_p
)
12707 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12710 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12711 definition of this tag. Since, in addition, we are currently
12712 processing a (member) template declaration of a template
12713 class, we must be very careful; consider:
12720 { template <class V>
12721 friend struct S1; };
12723 Here, the S2::S1 declaration should not be confused with the
12724 outer declaration. In particular, the inner version should
12725 have a template parameter of level 2, not level 1. This
12726 would be particularly important if the member declaration
12729 template <class V = U> friend struct S1;
12731 say, when we should tsubst into `U' when instantiating
12732 S2. On the other hand, when presented with:
12742 we must find the inner binding eventually. We
12743 accomplish this by making sure that the new type we
12744 create to represent this declaration has the right
12746 context
= TYPE_CONTEXT (t
);
12752 /* If no such tag is yet defined, create a forward-reference node
12753 and record it as the "definition".
12754 When a real declaration of this type is found,
12755 the forward-reference will be altered into a real type. */
12756 if (code
== ENUMERAL_TYPE
)
12758 error ("use of enum %q#D without previous declaration", name
);
12759 return error_mark_node
;
12763 t
= make_class_type (code
);
12764 TYPE_CONTEXT (t
) = context
;
12765 if (orig_scope
== ts_lambda
)
12766 /* Remember that we're declaring a lambda to avoid bogus errors
12767 in push_template_decl. */
12768 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12769 t
= pushtag (name
, t
, scope
);
12774 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12776 /* Check that we aren't trying to overload a class with different
12778 tree constr
= NULL_TREE
;
12779 if (current_template_parms
)
12781 tree reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
12782 constr
= build_constraints (reqs
, NULL_TREE
);
12784 if (!redeclare_class_template (t
, current_template_parms
, constr
))
12785 return error_mark_node
;
12787 else if (!processing_template_decl
12788 && CLASS_TYPE_P (t
)
12789 && CLASSTYPE_IS_TEMPLATE (t
))
12791 error ("redeclaration of %qT as a non-template", t
);
12792 error ("previous declaration %q+D", t
);
12793 return error_mark_node
;
12796 /* Make injected friend class visible. */
12797 if (scope
!= ts_within_enclosing_non_class
12798 && hidden_name_p (TYPE_NAME (t
)))
12800 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12801 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12803 if (TYPE_TEMPLATE_INFO (t
))
12805 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12806 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12814 /* Wrapper for xref_tag_1. */
12817 xref_tag (enum tag_types tag_code
, tree name
,
12818 tag_scope scope
, bool template_header_p
)
12822 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12823 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12824 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12830 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12832 enum tag_types tag_kind
;
12834 if (TREE_CODE (old
) == RECORD_TYPE
)
12835 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12837 tag_kind
= union_type
;
12839 if (id
== NULL_TREE
)
12840 id
= TYPE_IDENTIFIER (old
);
12842 return xref_tag (tag_kind
, id
, scope
, false);
12845 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12846 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12847 access_* node, and the TREE_VALUE is the type of the base-class.
12848 Non-NULL TREE_TYPE indicates virtual inheritance.
12850 Returns true if the binfo hierarchy was successfully created,
12851 false if an error was detected. */
12854 xref_basetypes (tree ref
, tree base_list
)
12857 tree binfo
, base_binfo
;
12858 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12859 unsigned max_bases
= 0; /* Maximum direct bases. */
12860 unsigned max_dvbases
= 0; /* Maximum direct virtual bases. */
12862 tree default_access
;
12863 tree igo_prev
; /* Track Inheritance Graph Order. */
12865 if (ref
== error_mark_node
)
12868 /* The base of a derived class is private by default, all others are
12870 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12871 && CLASSTYPE_DECLARED_CLASS (ref
)
12872 ? access_private_node
: access_public_node
);
12874 /* First, make sure that any templates in base-classes are
12875 instantiated. This ensures that if we call ourselves recursively
12876 we do not get confused about which classes are marked and which
12878 basep
= &base_list
;
12881 tree basetype
= TREE_VALUE (*basep
);
12883 /* The dependent_type_p call below should really be dependent_scope_p
12884 so that we give a hard error about using an incomplete type as a
12885 base, but we allow it with a pedwarn for backward
12887 if (processing_template_decl
12888 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12889 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12890 if (!dependent_type_p (basetype
)
12891 && !complete_type_or_else (basetype
, NULL
))
12892 /* An incomplete type. Remove it from the list. */
12893 *basep
= TREE_CHAIN (*basep
);
12897 if (TREE_TYPE (*basep
))
12899 if (CLASS_TYPE_P (basetype
))
12900 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12901 basep
= &TREE_CHAIN (*basep
);
12904 max_vbases
+= max_dvbases
;
12906 TYPE_MARKED_P (ref
) = 1;
12908 /* The binfo slot should be empty, unless this is an (ill-formed)
12910 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12912 error ("redefinition of %q#T", ref
);
12916 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12918 binfo
= make_tree_binfo (max_bases
);
12920 TYPE_BINFO (ref
) = binfo
;
12921 BINFO_OFFSET (binfo
) = size_zero_node
;
12922 BINFO_TYPE (binfo
) = ref
;
12924 /* Apply base-class info set up to the variants of this type. */
12925 fixup_type_variants (ref
);
12929 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12930 /* An aggregate cannot have baseclasses. */
12931 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12933 if (TREE_CODE (ref
) == UNION_TYPE
)
12935 error ("derived union %qT invalid", ref
);
12942 if (TYPE_FOR_JAVA (ref
))
12944 error ("Java class %qT cannot have multiple bases", ref
);
12948 warning (OPT_Wmultiple_inheritance
,
12949 "%qT defined with multiple direct bases", ref
);
12954 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12956 if (TYPE_FOR_JAVA (ref
))
12958 error ("Java class %qT cannot have virtual bases", ref
);
12961 else if (max_dvbases
)
12962 warning (OPT_Wvirtual_inheritance
,
12963 "%qT defined with direct virtual base", ref
);
12966 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12968 tree access
= TREE_PURPOSE (base_list
);
12969 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12970 tree basetype
= TREE_VALUE (base_list
);
12972 if (access
== access_default_node
)
12973 access
= default_access
;
12975 if (PACK_EXPANSION_P (basetype
))
12976 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12977 if (TREE_CODE (basetype
) == TYPE_DECL
)
12978 basetype
= TREE_TYPE (basetype
);
12979 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12981 error ("base type %qT fails to be a struct or class type",
12986 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12987 TYPE_FOR_JAVA (ref
) = 1;
12989 base_binfo
= NULL_TREE
;
12990 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12992 base_binfo
= TYPE_BINFO (basetype
);
12993 /* The original basetype could have been a typedef'd type. */
12994 basetype
= BINFO_TYPE (base_binfo
);
12996 /* Inherit flags from the base. */
12997 TYPE_HAS_NEW_OPERATOR (ref
)
12998 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12999 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
13000 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
13001 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
13002 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
13003 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
13004 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
13005 CLASSTYPE_REPEATED_BASE_P (ref
)
13006 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
13009 /* We must do this test after we've seen through a typedef
13011 if (TYPE_MARKED_P (basetype
))
13013 if (basetype
== ref
)
13014 error ("recursive type %qT undefined", basetype
);
13016 error ("duplicate base type %qT invalid", basetype
);
13020 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
13021 /* Regenerate the pack expansion for the bases. */
13022 basetype
= make_pack_expansion (basetype
);
13024 TYPE_MARKED_P (basetype
) = 1;
13026 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
13027 &igo_prev
, via_virtual
);
13028 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
13029 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
13031 BINFO_BASE_APPEND (binfo
, base_binfo
);
13032 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
13035 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
13036 /* If we didn't get max_vbases vbases, we must have shared at
13037 least one of them, and are therefore diamond shaped. */
13038 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
13040 /* Unmark all the types. */
13041 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
13042 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
13043 TYPE_MARKED_P (ref
) = 0;
13045 /* Now see if we have a repeated base type. */
13046 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
13048 for (base_binfo
= binfo
; base_binfo
;
13049 base_binfo
= TREE_CHAIN (base_binfo
))
13051 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
13053 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
13056 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
13058 for (base_binfo
= binfo
; base_binfo
;
13059 base_binfo
= TREE_CHAIN (base_binfo
))
13060 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
13061 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
13070 /* Copies the enum-related properties from type SRC to type DST.
13071 Used with the underlying type of an enum and the enum itself. */
13073 copy_type_enum (tree dst
, tree src
)
13076 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
13078 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
13079 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
13080 TYPE_SIZE (t
) = TYPE_SIZE (src
);
13081 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
13082 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
13083 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
13084 unsigned valign
= TYPE_ALIGN (src
);
13085 if (TYPE_USER_ALIGN (t
))
13086 valign
= MAX (valign
, TYPE_ALIGN (t
));
13088 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
13089 SET_TYPE_ALIGN (t
, valign
);
13090 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
13094 /* Begin compiling the definition of an enumeration type.
13097 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13099 UNDERLYING_TYPE is the type that will be used as the storage for
13100 the enumeration type. This should be NULL_TREE if no storage type
13103 ATTRIBUTES are any attributes specified after the enum-key.
13105 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13107 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13109 Returns the type object, as yet incomplete.
13110 Also records info about it so that build_enumerator
13111 may be used to declare the individual values as they are read. */
13114 start_enum (tree name
, tree enumtype
, tree underlying_type
,
13115 tree attributes
, bool scoped_enum_p
, bool *is_new
)
13117 tree prevtype
= NULL_TREE
;
13118 gcc_assert (identifier_p (name
));
13122 /* [C++0x dcl.enum]p5:
13124 If not explicitly specified, the underlying type of a scoped
13125 enumeration type is int. */
13126 if (!underlying_type
&& scoped_enum_p
)
13127 underlying_type
= integer_type_node
;
13129 if (underlying_type
)
13130 underlying_type
= cv_unqualified (underlying_type
);
13132 /* If this is the real definition for a previous forward reference,
13133 fill in the contents in the same object that used to be the
13134 forward reference. */
13136 enumtype
= lookup_and_check_tag (enum_type
, name
,
13137 /*tag_scope=*/ts_current
,
13138 /*template_header_p=*/false);
13140 /* In case of a template_decl, the only check that should be deferred
13141 to instantiation time is the comparison of underlying types. */
13142 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
13144 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
13146 error_at (input_location
, "scoped/unscoped mismatch "
13147 "in enum %q#T", enumtype
);
13148 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13149 "previous definition here");
13150 enumtype
= error_mark_node
;
13152 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
13154 error_at (input_location
, "underlying type mismatch "
13155 "in enum %q#T", enumtype
);
13156 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13157 "previous definition here");
13158 enumtype
= error_mark_node
;
13160 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
13161 && !dependent_type_p (underlying_type
)
13162 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
13163 && !same_type_p (underlying_type
,
13164 ENUM_UNDERLYING_TYPE (enumtype
)))
13166 error_at (input_location
, "different underlying type "
13167 "in enum %q#T", enumtype
);
13168 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13169 "previous definition here");
13170 underlying_type
= NULL_TREE
;
13174 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
13175 || processing_template_decl
)
13177 /* In case of error, make a dummy enum to allow parsing to
13179 if (enumtype
== error_mark_node
)
13181 name
= make_anon_name ();
13182 enumtype
= NULL_TREE
;
13185 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
13186 of an opaque enum, or an opaque enum of an already defined
13187 enumeration (C++0x only).
13188 In any other case, it'll be NULL_TREE. */
13194 prevtype
= enumtype
;
13196 /* Do not push the decl more than once, unless we need to
13197 compare underlying types at instantiation time */
13199 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
13200 || (underlying_type
13201 && dependent_type_p (underlying_type
))
13202 || (ENUM_UNDERLYING_TYPE (enumtype
)
13203 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
13205 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
13206 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
13209 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
13212 if (enumtype
== error_mark_node
)
13213 return error_mark_node
;
13215 /* The enum is considered opaque until the opening '{' of the
13216 enumerator list. */
13217 SET_OPAQUE_ENUM_P (enumtype
, true);
13218 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
13221 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
13223 cplus_decl_attributes (&enumtype
, attributes
, (int)ATTR_FLAG_TYPE_IN_PLACE
);
13225 if (underlying_type
)
13227 if (ENUM_UNDERLYING_TYPE (enumtype
))
13228 /* We already checked that it matches, don't change it to a different
13229 typedef variant. */;
13230 else if (CP_INTEGRAL_TYPE_P (underlying_type
))
13232 copy_type_enum (enumtype
, underlying_type
);
13233 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
13235 else if (dependent_type_p (underlying_type
))
13236 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
13238 error ("underlying type %<%T%> of %<%T%> must be an integral type",
13239 underlying_type
, enumtype
);
13242 /* If into a template class, the returned enum is always the first
13243 declaration (opaque or not) seen. This way all the references to
13244 this type will be to the same declaration. The following ones are used
13245 only to check for definition errors. */
13246 if (prevtype
&& processing_template_decl
)
13252 /* After processing and defining all the values of an enumeration type,
13253 install their decls in the enumeration type.
13254 ENUMTYPE is the type object. */
13257 finish_enum_value_list (tree enumtype
)
13260 tree underlying_type
;
13263 tree minnode
, maxnode
;
13266 bool fixed_underlying_type_p
13267 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
13269 /* We built up the VALUES in reverse order. */
13270 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
13272 /* For an enum defined in a template, just set the type of the values;
13273 all further processing is postponed until the template is
13274 instantiated. We need to set the type so that tsubst of a CONST_DECL
13276 if (processing_template_decl
)
13278 for (values
= TYPE_VALUES (enumtype
);
13280 values
= TREE_CHAIN (values
))
13281 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
13285 /* Determine the minimum and maximum values of the enumerators. */
13286 if (TYPE_VALUES (enumtype
))
13288 minnode
= maxnode
= NULL_TREE
;
13290 for (values
= TYPE_VALUES (enumtype
);
13292 values
= TREE_CHAIN (values
))
13294 decl
= TREE_VALUE (values
);
13296 /* [dcl.enum]: Following the closing brace of an enum-specifier,
13297 each enumerator has the type of its enumeration. Prior to the
13298 closing brace, the type of each enumerator is the type of its
13299 initializing value. */
13300 TREE_TYPE (decl
) = enumtype
;
13302 /* Update the minimum and maximum values, if appropriate. */
13303 value
= DECL_INITIAL (decl
);
13304 if (value
== error_mark_node
)
13305 value
= integer_zero_node
;
13306 /* Figure out what the minimum and maximum values of the
13307 enumerators are. */
13309 minnode
= maxnode
= value
;
13310 else if (tree_int_cst_lt (maxnode
, value
))
13312 else if (tree_int_cst_lt (value
, minnode
))
13319 If the enumerator-list is empty, the underlying type is as if
13320 the enumeration had a single enumerator with value 0. */
13321 minnode
= maxnode
= integer_zero_node
;
13323 if (!fixed_underlying_type_p
)
13325 /* Compute the number of bits require to represent all values of the
13326 enumeration. We must do this before the type of MINNODE and
13327 MAXNODE are transformed, since tree_int_cst_min_precision relies
13328 on the TREE_TYPE of the value it is passed. */
13329 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
13330 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
13331 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
13332 int precision
= MAX (lowprec
, highprec
);
13334 bool use_short_enum
;
13336 /* Determine the underlying type of the enumeration.
13340 The underlying type of an enumeration is an integral type that
13341 can represent all the enumerator values defined in the
13342 enumeration. It is implementation-defined which integral type is
13343 used as the underlying type for an enumeration except that the
13344 underlying type shall not be larger than int unless the value of
13345 an enumerator cannot fit in an int or unsigned int.
13347 We use "int" or an "unsigned int" as the underlying type, even if
13348 a smaller integral type would work, unless the user has
13349 explicitly requested that we use the smallest possible type. The
13350 user can request that for all enumerations with a command line
13351 flag, or for just one enumeration with an attribute. */
13353 use_short_enum
= flag_short_enums
13354 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
13356 /* If the precision of the type was specified with an attribute and it
13357 was too small, give an error. Otherwise, use it. */
13358 if (TYPE_PRECISION (enumtype
))
13360 if (precision
> TYPE_PRECISION (enumtype
))
13361 error ("specified mode too small for enumeral values");
13364 use_short_enum
= true;
13365 precision
= TYPE_PRECISION (enumtype
);
13369 for (itk
= (use_short_enum
? itk_char
: itk_int
);
13373 underlying_type
= integer_types
[itk
];
13374 if (underlying_type
!= NULL_TREE
13375 && TYPE_PRECISION (underlying_type
) >= precision
13376 && TYPE_SIGN (underlying_type
) == sgn
)
13379 if (itk
== itk_none
)
13383 IF no integral type can represent all the enumerator values, the
13384 enumeration is ill-formed. */
13385 error ("no integral type can represent all of the enumerator values "
13386 "for %qT", enumtype
);
13387 precision
= TYPE_PRECISION (long_long_integer_type_node
);
13388 underlying_type
= integer_types
[itk_unsigned_long_long
];
13393 The value of sizeof() applied to an enumeration type, an object
13394 of an enumeration type, or an enumerator, is the value of sizeof()
13395 applied to the underlying type. */
13396 copy_type_enum (enumtype
, underlying_type
);
13398 /* Compute the minimum and maximum values for the type.
13402 For an enumeration where emin is the smallest enumerator and emax
13403 is the largest, the values of the enumeration are the values of the
13404 underlying type in the range bmin to bmax, where bmin and bmax are,
13405 respectively, the smallest and largest values of the smallest bit-
13406 field that can store emin and emax. */
13408 /* The middle-end currently assumes that types with TYPE_PRECISION
13409 narrower than their underlying type are suitably zero or sign
13410 extended to fill their mode. Similarly, it assumes that the front
13411 end assures that a value of a particular type must be within
13412 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
13414 We used to set these fields based on bmin and bmax, but that led
13415 to invalid assumptions like optimizing away bounds checking. So
13416 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
13417 TYPE_MAX_VALUE to the values for the mode above and only restrict
13418 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
13419 ENUM_UNDERLYING_TYPE (enumtype
)
13420 = build_distinct_type_copy (underlying_type
);
13421 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
13422 set_min_and_max_values_for_integral_type
13423 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
13425 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
13426 if (flag_strict_enums
)
13427 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
13430 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13432 /* Convert each of the enumerators to the type of the underlying
13433 type of the enumeration. */
13434 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13436 location_t saved_location
;
13438 decl
= TREE_VALUE (values
);
13439 saved_location
= input_location
;
13440 input_location
= DECL_SOURCE_LOCATION (decl
);
13441 if (fixed_underlying_type_p
)
13442 /* If the enumeration type has a fixed underlying type, we
13443 already checked all of the enumerator values. */
13444 value
= DECL_INITIAL (decl
);
13446 value
= perform_implicit_conversion (underlying_type
,
13447 DECL_INITIAL (decl
),
13448 tf_warning_or_error
);
13449 input_location
= saved_location
;
13451 /* Do not clobber shared ints. */
13452 value
= copy_node (value
);
13454 TREE_TYPE (value
) = enumtype
;
13455 DECL_INITIAL (decl
) = value
;
13458 /* Fix up all variant types of this enum type. */
13459 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13460 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13462 if (at_class_scope_p ()
13463 && COMPLETE_TYPE_P (current_class_type
)
13464 && UNSCOPED_ENUM_P (enumtype
))
13465 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13466 current_class_type
);
13468 /* Finish debugging output for this type. */
13469 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13471 /* Each enumerator now has the type of its enumeration. Clear the cache
13472 so that this change in types doesn't confuse us later on. */
13473 clear_cv_and_fold_caches ();
13476 /* Finishes the enum type. This is called only the first time an
13477 enumeration is seen, be it opaque or odinary.
13478 ENUMTYPE is the type object. */
13481 finish_enum (tree enumtype
)
13483 if (processing_template_decl
)
13485 if (at_function_scope_p ())
13486 add_stmt (build_min (TAG_DEFN
, enumtype
));
13490 /* If this is a forward declaration, there should not be any variants,
13491 though we can get a variant in the middle of an enum-specifier with
13492 wacky code like 'enum E { e = sizeof(const E*) };' */
13493 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13494 && (TYPE_VALUES (enumtype
)
13495 || !TYPE_NEXT_VARIANT (enumtype
)));
13498 /* Build and install a CONST_DECL for an enumeration constant of the
13499 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13500 Apply ATTRIBUTES if available. LOC is the location of NAME.
13501 Assignment of sequential values by default is handled here. */
13504 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13511 /* scalar_constant_value will pull out this expression, so make sure
13512 it's folded as appropriate. */
13513 if (processing_template_decl
)
13514 value
= fold_non_dependent_expr (value
);
13516 /* If the VALUE was erroneous, pretend it wasn't there; that will
13517 result in the enum being assigned the next value in sequence. */
13518 if (value
== error_mark_node
)
13521 /* Remove no-op casts from the value. */
13523 STRIP_TYPE_NOPS (value
);
13525 if (! processing_template_decl
)
13527 /* Validate and default VALUE. */
13528 if (value
!= NULL_TREE
)
13530 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13532 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13537 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13538 (TREE_TYPE (value
)))
13539 value
= perform_implicit_conversion_flags
13540 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13541 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13543 if (value
== error_mark_node
)
13546 if (value
!= NULL_TREE
)
13548 value
= cxx_constant_value (value
);
13550 if (TREE_CODE (value
) != INTEGER_CST
13551 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13553 error ("enumerator value for %qD is not an integer constant",
13560 /* Default based on previous value. */
13561 if (value
== NULL_TREE
)
13563 if (TYPE_VALUES (enumtype
))
13568 /* C++03 7.2/4: If no initializer is specified for the first
13569 enumerator, the type is an unspecified integral
13570 type. Otherwise the type is the same as the type of the
13571 initializing value of the preceding enumerator unless the
13572 incremented value is not representable in that type, in
13573 which case the type is an unspecified integral type
13574 sufficient to contain the incremented value. */
13575 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13576 if (error_operand_p (prev_value
))
13577 value
= error_mark_node
;
13580 tree type
= TREE_TYPE (prev_value
);
13581 signop sgn
= TYPE_SIGN (type
);
13582 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13586 bool pos
= !wi::neg_p (wi
, sgn
);
13587 if (!wi::fits_to_tree_p (wi
, type
))
13590 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13592 type
= integer_types
[itk
];
13593 if (type
!= NULL_TREE
13594 && (pos
|| !TYPE_UNSIGNED (type
))
13595 && wi::fits_to_tree_p (wi
, type
))
13598 if (type
&& cxx_dialect
< cxx11
13599 && itk
> itk_unsigned_long
)
13600 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13601 incremented enumerator value is too large for %<unsigned long%>" : "\
13602 incremented enumerator value is too large for %<long%>");
13604 if (type
== NULL_TREE
)
13607 value
= wide_int_to_tree (type
, wi
);
13612 error ("overflow in enumeration values at %qD", name
);
13613 value
= error_mark_node
;
13618 value
= integer_zero_node
;
13621 /* Remove no-op casts from the value. */
13622 STRIP_TYPE_NOPS (value
);
13624 /* If the underlying type of the enum is fixed, check whether
13625 the enumerator values fits in the underlying type. If it
13626 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13627 if (ENUM_UNDERLYING_TYPE (enumtype
)
13629 && TREE_CODE (value
) == INTEGER_CST
)
13631 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13632 error ("enumerator value %E is outside the range of underlying "
13633 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13635 /* Convert the value to the appropriate type. */
13636 value
= fold_convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13640 /* C++ associates enums with global, function, or class declarations. */
13641 context
= current_scope ();
13643 /* Build the actual enumeration constant. Note that the enumeration
13644 constants have the underlying type of the enum (if it is fixed)
13645 or the type of their initializer (if the underlying type of the
13646 enum is not fixed):
13650 If the underlying type is fixed, the type of each enumerator
13651 prior to the closing brace is the underlying type; if the
13652 initializing value of an enumerator cannot be represented by
13653 the underlying type, the program is ill-formed. If the
13654 underlying type is not fixed, the type of each enumerator is
13655 the type of its initializing value.
13657 If the underlying type is not fixed, it will be computed by
13658 finish_enum and we will reset the type of this enumerator. Of
13659 course, if we're processing a template, there may be no value. */
13660 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13662 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13664 DECL_CONTEXT (decl
) = enumtype
;
13665 TREE_CONSTANT (decl
) = 1;
13666 TREE_READONLY (decl
) = 1;
13667 DECL_INITIAL (decl
) = value
;
13670 cplus_decl_attributes (&decl
, attributes
, 0);
13672 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13674 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13675 on the TYPE_FIELDS list for `S'. (That's so that you can say
13676 things like `S::i' later.) */
13678 /* The enumerator may be getting declared outside of its enclosing
13681 class S { public: enum E : int; }; enum S::E : int { i = 7; };
13683 For which case we need to make sure that the access of `S::i'
13684 matches the access of `S::E'. */
13685 tree saved_cas
= current_access_specifier
;
13686 if (TREE_PRIVATE (TYPE_NAME (enumtype
)))
13687 current_access_specifier
= access_private_node
;
13688 else if (TREE_PROTECTED (TYPE_NAME (enumtype
)))
13689 current_access_specifier
= access_protected_node
;
13691 current_access_specifier
= access_public_node
;
13693 finish_member_declaration (decl
);
13695 current_access_specifier
= saved_cas
;
13700 /* Add this enumeration constant to the list for this type. */
13701 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13704 /* Look for an enumerator with the given NAME within the enumeration
13705 type ENUMTYPE. This routine is used primarily for qualified name
13706 lookup into an enumerator in C++0x, e.g.,
13708 enum class Color { Red, Green, Blue };
13710 Color color = Color::Red;
13712 Returns the value corresponding to the enumerator, or
13713 NULL_TREE if no such enumerator was found. */
13715 lookup_enumerator (tree enumtype
, tree name
)
13718 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13720 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13721 return e
? TREE_VALUE (e
) : NULL_TREE
;
13725 /* We're defining DECL. Make sure that its type is OK. */
13728 check_function_type (tree decl
, tree current_function_parms
)
13730 tree fntype
= TREE_TYPE (decl
);
13731 tree return_type
= complete_type (TREE_TYPE (fntype
));
13733 /* In a function definition, arg types must be complete. */
13734 require_complete_types_for_parms (current_function_parms
);
13736 if (dependent_type_p (return_type
)
13737 || type_uses_auto (return_type
))
13739 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13740 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13742 tree args
= TYPE_ARG_TYPES (fntype
);
13744 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13745 error ("return type %q#T is incomplete", return_type
);
13747 error ("return type has Java class type %q#T", return_type
);
13749 /* Make it return void instead. */
13750 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13751 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13753 TREE_CHAIN (args
));
13755 fntype
= build_function_type (void_type_node
, args
);
13757 = build_exception_variant (fntype
,
13758 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13759 fntype
= (cp_build_type_attribute_variant
13760 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13761 TREE_TYPE (decl
) = fntype
;
13764 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13767 /* True iff FN is an implicitly-defined default constructor. */
13770 implicit_default_ctor_p (tree fn
)
13772 return (DECL_CONSTRUCTOR_P (fn
)
13773 && !user_provided_p (fn
)
13774 && sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (fn
)));
13777 /* Clobber the contents of *this to let the back end know that the object
13778 storage is dead when we enter the constructor or leave the destructor. */
13781 build_clobber_this ()
13783 /* Clobbering an empty base is pointless, and harmful if its one byte
13784 TYPE_SIZE overlays real data. */
13785 if (is_empty_class (current_class_type
))
13788 /* If we have virtual bases, clobber the whole object, but only if we're in
13789 charge. If we don't have virtual bases, clobber the as-base type so we
13790 don't mess with tail padding. */
13791 bool vbases
= CLASSTYPE_VBASECLASSES (current_class_type
);
13793 tree ctype
= current_class_type
;
13795 ctype
= CLASSTYPE_AS_BASE (ctype
);
13797 tree clobber
= build_constructor (ctype
, NULL
);
13798 TREE_THIS_VOLATILE (clobber
) = true;
13800 tree thisref
= current_class_ref
;
13801 if (ctype
!= current_class_type
)
13803 thisref
= build_nop (build_reference_type (ctype
), current_class_ptr
);
13804 thisref
= convert_from_reference (thisref
);
13807 tree exprstmt
= build2 (MODIFY_EXPR
, void_type_node
, thisref
, clobber
);
13809 exprstmt
= build_if_in_charge (exprstmt
);
13814 /* Create the FUNCTION_DECL for a function definition.
13815 DECLSPECS and DECLARATOR are the parts of the declaration;
13816 they describe the function's name and the type it returns,
13817 but twisted together in a fashion that parallels the syntax of C.
13819 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13820 DECLARATOR is really the DECL for the function we are about to
13821 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13822 indicating that the function is an inline defined in-class.
13824 This function creates a binding context for the function body
13825 as well as setting up the FUNCTION_DECL in current_function_decl.
13827 For C++, we must first check whether that datum makes any sense.
13828 For example, "class A local_a(1,2);" means that variable local_a
13829 is an aggregate of type A, which should have a constructor
13830 applied to it with the argument list [1, 2].
13832 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13833 or may be a BLOCK if the function has been defined previously
13834 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13835 error_mark_node if the function has never been defined, or
13836 a BLOCK if the function has been defined somewhere. */
13839 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13841 tree ctype
= NULL_TREE
;
13844 int doing_friend
= 0;
13845 cp_binding_level
*bl
;
13846 tree current_function_parms
;
13847 struct c_fileinfo
*finfo
13848 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13849 bool honor_interface
;
13851 /* Sanity check. */
13852 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13853 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13855 fntype
= TREE_TYPE (decl1
);
13856 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13857 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13859 /* ISO C++ 11.4/5. A friend function defined in a class is in
13860 the (lexical) scope of the class in which it is defined. */
13861 if (!ctype
&& DECL_FRIEND_P (decl1
))
13863 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13865 /* CTYPE could be null here if we're dealing with a template;
13866 for example, `inline friend float foo()' inside a template
13867 will have no CTYPE set. */
13868 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13874 if (DECL_DECLARED_INLINE_P (decl1
)
13875 && lookup_attribute ("noinline", attrs
))
13876 warning_at (DECL_SOURCE_LOCATION (decl1
), 0,
13877 "inline function %qD given attribute noinline", decl1
);
13879 /* Handle gnu_inline attribute. */
13880 if (GNU_INLINE_P (decl1
))
13882 DECL_EXTERNAL (decl1
) = 1;
13883 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13884 DECL_INTERFACE_KNOWN (decl1
) = 1;
13885 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13888 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13889 /* This is a constructor, we must ensure that any default args
13890 introduced by this definition are propagated to the clones
13891 now. The clones are used directly in overload resolution. */
13892 adjust_clone_args (decl1
);
13894 /* Sometimes we don't notice that a function is a static member, and
13895 build a METHOD_TYPE for it. Fix that up now. */
13896 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13897 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13899 /* Set up current_class_type, and enter the scope of the class, if
13902 push_nested_class (ctype
);
13903 else if (DECL_STATIC_FUNCTION_P (decl1
))
13904 push_nested_class (DECL_CONTEXT (decl1
));
13906 /* Now that we have entered the scope of the class, we must restore
13907 the bindings for any template parameters surrounding DECL1, if it
13908 is an inline member template. (Order is important; consider the
13909 case where a template parameter has the same name as a field of
13910 the class.) It is not until after this point that
13911 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13912 if (flags
& SF_INCLASS_INLINE
)
13913 maybe_begin_member_template_processing (decl1
);
13915 /* Effective C++ rule 15. */
13917 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13918 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13919 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13921 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13922 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13923 if (!DECL_INITIAL (decl1
))
13924 DECL_INITIAL (decl1
) = error_mark_node
;
13926 /* This function exists in static storage.
13927 (This does not mean `static' in the C sense!) */
13928 TREE_STATIC (decl1
) = 1;
13930 /* We must call push_template_decl after current_class_type is set
13931 up. (If we are processing inline definitions after exiting a
13932 class scope, current_class_type will be NULL_TREE until set above
13933 by push_nested_class.) */
13934 if (processing_template_decl
)
13936 tree newdecl1
= push_template_decl (decl1
);
13937 if (newdecl1
== error_mark_node
)
13939 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13940 pop_nested_class ();
13946 /* We are now in the scope of the function being defined. */
13947 current_function_decl
= decl1
;
13949 /* Save the parm names or decls from this function's declarator
13950 where store_parm_decls will find them. */
13951 current_function_parms
= DECL_ARGUMENTS (decl1
);
13953 /* Make sure the parameter and return types are reasonable. When
13954 you declare a function, these types can be incomplete, but they
13955 must be complete when you define the function. */
13956 check_function_type (decl1
, current_function_parms
);
13958 /* Build the return declaration for the function. */
13959 restype
= TREE_TYPE (fntype
);
13961 if (DECL_RESULT (decl1
) == NULL_TREE
)
13965 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13966 DECL_ARTIFICIAL (resdecl
) = 1;
13967 DECL_IGNORED_P (resdecl
) = 1;
13968 DECL_RESULT (decl1
) = resdecl
;
13970 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13973 /* Let the user know we're compiling this function. */
13974 announce_function (decl1
);
13976 /* Record the decl so that the function name is defined.
13977 If we already have a decl for this name, and it is a FUNCTION_DECL,
13978 use the old decl. */
13979 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13981 /* A specialization is not used to guide overload resolution. */
13982 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13983 && !(DECL_USE_TEMPLATE (decl1
) &&
13984 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13986 tree olddecl
= pushdecl (decl1
);
13988 if (olddecl
== error_mark_node
)
13989 /* If something went wrong when registering the declaration,
13990 use DECL1; we have to have a FUNCTION_DECL to use when
13991 parsing the body of the function. */
13995 /* Otherwise, OLDDECL is either a previous declaration
13996 of the same function or DECL1 itself. */
13998 if (warn_missing_declarations
13999 && olddecl
== decl1
14000 && !DECL_MAIN_P (decl1
)
14001 && TREE_PUBLIC (decl1
)
14002 && !DECL_DECLARED_INLINE_P (decl1
))
14006 /* Check whether DECL1 is in an anonymous
14008 for (context
= DECL_CONTEXT (decl1
);
14010 context
= DECL_CONTEXT (context
))
14012 if (TREE_CODE (context
) == NAMESPACE_DECL
14013 && DECL_NAME (context
) == NULL_TREE
)
14017 if (context
== NULL
)
14018 warning_at (DECL_SOURCE_LOCATION (decl1
),
14019 OPT_Wmissing_declarations
,
14020 "no previous declaration for %qD", decl1
);
14028 /* We need to set the DECL_CONTEXT. */
14029 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
14030 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
14032 fntype
= TREE_TYPE (decl1
);
14033 restype
= TREE_TYPE (fntype
);
14035 /* If #pragma weak applies, mark the decl appropriately now.
14036 The pragma only applies to global functions. Because
14037 determining whether or not the #pragma applies involves
14038 computing the mangled name for the declaration, we cannot
14039 apply the pragma until after we have merged this declaration
14040 with any previous declarations; if the original declaration
14041 has a linkage specification, that specification applies to
14042 the definition as well, and may affect the mangled name. */
14043 if (DECL_FILE_SCOPE_P (decl1
))
14044 maybe_apply_pragma_weak (decl1
);
14047 /* Reset this in case the call to pushdecl changed it. */
14048 current_function_decl
= decl1
;
14050 gcc_assert (DECL_INITIAL (decl1
));
14052 /* This function may already have been parsed, in which case just
14053 return; our caller will skip over the body without parsing. */
14054 if (DECL_INITIAL (decl1
) != error_mark_node
)
14057 /* Initialize RTL machinery. We cannot do this until
14058 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
14059 even when processing a template; this is how we get
14060 CFUN set up, and our per-function variables initialized.
14061 FIXME factor out the non-RTL stuff. */
14062 bl
= current_binding_level
;
14063 allocate_struct_function (decl1
, processing_template_decl
);
14065 /* Initialize the language data structures. Whenever we start
14066 a new function, we destroy temporaries in the usual way. */
14067 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
14068 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
14069 current_binding_level
= bl
;
14071 if (!processing_template_decl
&& type_uses_auto (restype
))
14073 FNDECL_USED_AUTO (decl1
) = true;
14074 current_function_auto_return_pattern
= restype
;
14077 /* Start the statement-tree, start the tree now. */
14078 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
14080 /* If we are (erroneously) defining a function that we have already
14081 defined before, wipe out what we knew before. */
14082 if (!DECL_PENDING_INLINE_P (decl1
))
14083 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
14085 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
14087 /* We know that this was set up by `grokclassfn'. We do not
14088 wait until `store_parm_decls', since evil parse errors may
14089 never get us to that point. Here we keep the consistency
14090 between `current_class_type' and `current_class_ptr'. */
14091 tree t
= DECL_ARGUMENTS (decl1
);
14093 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
14094 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
14096 cp_function_chain
->x_current_class_ref
14097 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
14098 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
14099 cp_function_chain
->x_current_class_ptr
= t
;
14101 /* Constructors and destructors need to know whether they're "in
14102 charge" of initializing virtual base classes. */
14103 t
= DECL_CHAIN (t
);
14104 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
14106 current_in_charge_parm
= t
;
14107 t
= DECL_CHAIN (t
);
14109 if (DECL_HAS_VTT_PARM_P (decl1
))
14111 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
14112 current_vtt_parm
= t
;
14116 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
14117 /* Implicitly-defined methods (like the
14118 destructor for a class in which no destructor
14119 is explicitly declared) must not be defined
14120 until their definition is needed. So, we
14121 ignore interface specifications for
14122 compiler-generated functions. */
14123 && !DECL_ARTIFICIAL (decl1
));
14125 if (processing_template_decl
)
14126 /* Don't mess with interface flags. */;
14127 else if (DECL_INTERFACE_KNOWN (decl1
))
14129 tree ctx
= decl_function_context (decl1
);
14131 if (DECL_NOT_REALLY_EXTERN (decl1
))
14132 DECL_EXTERNAL (decl1
) = 0;
14134 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
14135 /* This is a function in a local class in an extern inline
14136 or template function. */
14137 comdat_linkage (decl1
);
14139 /* If this function belongs to an interface, it is public.
14140 If it belongs to someone else's interface, it is also external.
14141 This only affects inlines and template instantiations. */
14142 else if (!finfo
->interface_unknown
&& honor_interface
)
14144 if (DECL_DECLARED_INLINE_P (decl1
)
14145 || DECL_TEMPLATE_INSTANTIATION (decl1
))
14147 DECL_EXTERNAL (decl1
)
14148 = (finfo
->interface_only
14149 || (DECL_DECLARED_INLINE_P (decl1
)
14150 && ! flag_implement_inlines
14151 && !DECL_VINDEX (decl1
)));
14153 /* For WIN32 we also want to put these in linkonce sections. */
14154 maybe_make_one_only (decl1
);
14157 DECL_EXTERNAL (decl1
) = 0;
14158 DECL_INTERFACE_KNOWN (decl1
) = 1;
14159 /* If this function is in an interface implemented in this file,
14160 make sure that the back end knows to emit this function
14162 if (!DECL_EXTERNAL (decl1
))
14163 mark_needed (decl1
);
14165 else if (finfo
->interface_unknown
&& finfo
->interface_only
14166 && honor_interface
)
14168 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
14169 interface, we will have both finfo->interface_unknown and
14170 finfo->interface_only set. In that case, we don't want to
14171 use the normal heuristics because someone will supply a
14172 #pragma implementation elsewhere, and deducing it here would
14173 produce a conflict. */
14174 comdat_linkage (decl1
);
14175 DECL_EXTERNAL (decl1
) = 0;
14176 DECL_INTERFACE_KNOWN (decl1
) = 1;
14177 DECL_DEFER_OUTPUT (decl1
) = 1;
14181 /* This is a definition, not a reference.
14182 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
14183 if (!GNU_INLINE_P (decl1
))
14184 DECL_EXTERNAL (decl1
) = 0;
14186 if ((DECL_DECLARED_INLINE_P (decl1
)
14187 || DECL_TEMPLATE_INSTANTIATION (decl1
))
14188 && ! DECL_INTERFACE_KNOWN (decl1
))
14189 DECL_DEFER_OUTPUT (decl1
) = 1;
14191 DECL_INTERFACE_KNOWN (decl1
) = 1;
14194 /* Determine the ELF visibility attribute for the function. We must not
14195 do this before calling "pushdecl", as we must allow "duplicate_decls"
14196 to merge any attributes appropriately. We also need to wait until
14198 if (!DECL_CLONED_FUNCTION_P (decl1
))
14199 determine_visibility (decl1
);
14201 if (!processing_template_decl
)
14202 maybe_instantiate_noexcept (decl1
);
14204 begin_scope (sk_function_parms
, decl1
);
14208 if (DECL_DESTRUCTOR_P (decl1
)
14209 || (DECL_CONSTRUCTOR_P (decl1
)
14210 && targetm
.cxx
.cdtor_returns_this ()))
14211 cdtor_label
= create_artificial_label (input_location
);
14213 start_fname_decls ();
14215 store_parm_decls (current_function_parms
);
14217 if (!processing_template_decl
14218 && (flag_lifetime_dse
> 1)
14219 && DECL_CONSTRUCTOR_P (decl1
)
14220 && !DECL_CLONED_FUNCTION_P (decl1
)
14221 /* Clobbering an empty base is harmful if it overlays real data. */
14222 && !is_empty_class (current_class_type
)
14223 /* We can't clobber safely for an implicitly-defined default constructor
14224 because part of the initialization might happen before we enter the
14225 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
14226 && !implicit_default_ctor_p (decl1
))
14227 finish_expr_stmt (build_clobber_this ());
14229 if (!processing_template_decl
14230 && DECL_CONSTRUCTOR_P (decl1
)
14231 && (flag_sanitize
& SANITIZE_VPTR
)
14232 && !DECL_CLONED_FUNCTION_P (decl1
)
14233 && !implicit_default_ctor_p (decl1
))
14234 cp_ubsan_maybe_initialize_vtbl_ptrs (current_class_ptr
);
14240 /* Like start_preparsed_function, except that instead of a
14241 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
14243 Returns true on success. If the DECLARATOR is not suitable
14244 for a function, we return false, which tells the parser to
14245 skip the entire function. */
14248 start_function (cp_decl_specifier_seq
*declspecs
,
14249 const cp_declarator
*declarator
,
14254 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
14255 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
14256 if (decl1
== error_mark_node
)
14258 /* If the declarator is not suitable for a function definition,
14259 cause a syntax error. */
14260 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
14262 error ("invalid function declaration");
14266 if (DECL_MAIN_P (decl1
))
14267 /* main must return int. grokfndecl should have corrected it
14268 (and issued a diagnostic) if the user got it wrong. */
14269 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
14270 integer_type_node
));
14272 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
14275 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
14279 use_eh_spec_block (tree fn
)
14281 return (flag_exceptions
&& flag_enforce_eh_specs
14282 && !processing_template_decl
14283 && !type_throw_all_p (TREE_TYPE (fn
))
14284 /* We insert the EH_SPEC_BLOCK only in the original
14285 function; then, it is copied automatically to the
14287 && !DECL_CLONED_FUNCTION_P (fn
)
14288 /* Implicitly-generated constructors and destructors have
14289 exception specifications. However, those specifications
14290 are the union of the possible exceptions specified by the
14291 constructors/destructors for bases and members, so no
14292 unallowed exception will ever reach this function. By
14293 not creating the EH_SPEC_BLOCK we save a little memory,
14294 and we avoid spurious warnings about unreachable
14296 && !DECL_DEFAULTED_FN (fn
));
14299 /* Store the parameter declarations into the current function declaration.
14300 This is called after parsing the parameter declarations, before
14301 digesting the body of the function.
14303 Also install to binding contour return value identifier, if any. */
14306 store_parm_decls (tree current_function_parms
)
14308 tree fndecl
= current_function_decl
;
14311 /* This is a chain of any other decls that came in among the parm
14312 declarations. If a parm is declared with enum {foo, bar} x;
14313 then CONST_DECLs for foo and bar are put here. */
14314 tree nonparms
= NULL_TREE
;
14316 if (current_function_parms
)
14318 /* This case is when the function was defined with an ANSI prototype.
14319 The parms already have decls, so we need not do anything here
14320 except record them as in effect
14321 and complain if any redundant old-style parm decls were written. */
14323 tree specparms
= current_function_parms
;
14326 /* Must clear this because it might contain TYPE_DECLs declared
14328 current_binding_level
->names
= NULL
;
14330 /* If we're doing semantic analysis, then we'll call pushdecl
14331 for each of these. We must do them in reverse order so that
14332 they end in the correct forward order. */
14333 specparms
= nreverse (specparms
);
14335 for (parm
= specparms
; parm
; parm
= next
)
14337 next
= DECL_CHAIN (parm
);
14338 if (TREE_CODE (parm
) == PARM_DECL
)
14340 if (DECL_NAME (parm
) == NULL_TREE
14341 || !VOID_TYPE_P (parm
))
14344 error ("parameter %qD declared void", parm
);
14348 /* If we find an enum constant or a type tag,
14349 put it aside for the moment. */
14350 TREE_CHAIN (parm
) = NULL_TREE
;
14351 nonparms
= chainon (nonparms
, parm
);
14355 /* Get the decls in their original chain order and record in the
14356 function. This is all and only the PARM_DECLs that were
14357 pushed into scope by the loop above. */
14358 DECL_ARGUMENTS (fndecl
) = getdecls ();
14361 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
14363 /* Now store the final chain of decls for the arguments
14364 as the decl-chain of the current lexical scope.
14365 Put the enumerators in as well, at the front so that
14366 DECL_ARGUMENTS is not modified. */
14367 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
14369 if (use_eh_spec_block (current_function_decl
))
14370 current_eh_spec_block
= begin_eh_spec_block ();
14374 /* We have finished doing semantic analysis on DECL, but have not yet
14375 generated RTL for its body. Save away our current state, so that
14376 when we want to generate RTL later we know what to do. */
14379 save_function_data (tree decl
)
14381 struct language_function
*f
;
14383 /* Save the language-specific per-function data so that we can
14384 get it back when we really expand this function. */
14385 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
14388 f
= ggc_alloc
<language_function
> ();
14389 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
14390 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
14392 /* Clear out the bits we don't need. */
14393 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
14394 f
->bindings
= NULL
;
14395 f
->x_local_names
= NULL
;
14396 f
->base
.local_typedefs
= NULL
;
14400 /* Set the return value of the constructor (if present). */
14403 finish_constructor_body (void)
14408 if (targetm
.cxx
.cdtor_returns_this ()
14409 && (! TYPE_FOR_JAVA (current_class_type
)))
14411 /* Any return from a constructor will end up here. */
14412 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
14414 val
= DECL_ARGUMENTS (current_function_decl
);
14415 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14416 DECL_RESULT (current_function_decl
), val
);
14417 /* Return the address of the object. */
14418 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14419 add_stmt (exprstmt
);
14423 /* Do all the processing for the beginning of a destructor; set up the
14424 vtable pointers and cleanups for bases and members. */
14427 begin_destructor_body (void)
14429 tree compound_stmt
;
14431 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
14432 issued an error message. We still want to try to process the
14433 body of the function, but initialize_vtbl_ptrs will crash if
14434 TYPE_BINFO is NULL. */
14435 if (COMPLETE_TYPE_P (current_class_type
))
14437 compound_stmt
= begin_compound_stmt (0);
14438 /* Make all virtual function table pointers in non-virtual base
14439 classes point to CURRENT_CLASS_TYPE's virtual function
14441 initialize_vtbl_ptrs (current_class_ptr
);
14442 finish_compound_stmt (compound_stmt
);
14444 if (flag_lifetime_dse
14445 /* Clobbering an empty base is harmful if it overlays real data. */
14446 && !is_empty_class (current_class_type
))
14447 finish_decl_cleanup (NULL_TREE
, build_clobber_this ());
14449 /* And insert cleanups for our bases and members so that they
14450 will be properly destroyed if we throw. */
14451 push_base_cleanups ();
14455 /* At the end of every destructor we generate code to delete the object if
14456 necessary. Do that now. */
14459 finish_destructor_body (void)
14463 /* Any return from a destructor will end up here; that way all base
14464 and member cleanups will be run when the function returns. */
14465 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
14467 if (targetm
.cxx
.cdtor_returns_this ())
14471 val
= DECL_ARGUMENTS (current_function_decl
);
14472 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14473 DECL_RESULT (current_function_decl
), val
);
14474 /* Return the address of the object. */
14475 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14476 add_stmt (exprstmt
);
14480 /* Do the necessary processing for the beginning of a function body, which
14481 in this case includes member-initializers, but not the catch clauses of
14482 a function-try-block. Currently, this means opening a binding level
14483 for the member-initializers (in a ctor), member cleanups (in a dtor),
14484 and capture proxies (in a lambda operator()). */
14487 begin_function_body (void)
14491 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14494 if (processing_template_decl
)
14495 /* Do nothing now. */;
14497 /* Always keep the BLOCK node associated with the outermost pair of
14498 curly braces of a function. These are needed for correct
14499 operation of dwarfout.c. */
14500 keep_next_level (true);
14502 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14504 if (processing_template_decl
)
14505 /* Do nothing now. */;
14506 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14507 begin_destructor_body ();
14512 /* Do the processing for the end of a function body. Currently, this means
14513 closing out the cleanups for fully-constructed bases and members, and in
14514 the case of the destructor, deleting the object if desired. Again, this
14515 is only meaningful for [cd]tors, since they are the only functions where
14516 there is a significant distinction between the main body and any
14517 function catch clauses. Handling, say, main() return semantics here
14518 would be wrong, as flowing off the end of a function catch clause for
14519 main() would also need to return 0. */
14522 finish_function_body (tree compstmt
)
14524 if (compstmt
== NULL_TREE
)
14527 /* Close the block. */
14528 finish_compound_stmt (compstmt
);
14530 if (processing_template_decl
)
14531 /* Do nothing now. */;
14532 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14533 finish_constructor_body ();
14534 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14535 finish_destructor_body ();
14538 /* Given a function, returns the BLOCK corresponding to the outermost level
14539 of curly braces, skipping the artificial block created for constructor
14543 outer_curly_brace_block (tree fndecl
)
14545 tree block
= DECL_INITIAL (fndecl
);
14546 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14548 block
= BLOCK_SUBBLOCKS (block
);
14549 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14551 block
= BLOCK_SUBBLOCKS (block
);
14552 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14556 /* If FNDECL is a class's key method, add the class to the list of
14557 keyed classes that should be emitted. */
14560 record_key_method_defined (tree fndecl
)
14562 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14563 && DECL_VIRTUAL_P (fndecl
)
14564 && !processing_template_decl
)
14566 tree fnclass
= DECL_CONTEXT (fndecl
);
14567 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14568 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14572 /* Subroutine of finish_function.
14573 Save the body of constexpr functions for possible
14574 future compile time evaluation. */
14577 maybe_save_function_definition (tree fun
)
14579 if (!processing_template_decl
14580 && DECL_DECLARED_CONSTEXPR_P (fun
)
14581 && !cp_function_chain
->invalid_constexpr
14582 && !DECL_CLONED_FUNCTION_P (fun
))
14583 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14586 /* Finish up a function declaration and compile that function
14587 all the way to assembler language output. The free the storage
14588 for the function definition.
14590 FLAGS is a bitwise or of the following values:
14592 We just finished processing the body of an in-class inline
14593 function definition. (This processing will have taken place
14594 after the class definition is complete.) */
14597 finish_function (int flags
)
14599 tree fndecl
= current_function_decl
;
14600 tree fntype
, ctype
= NULL_TREE
;
14601 int inclass_inline
= (flags
& 2) != 0;
14603 /* When we get some parse errors, we can end up without a
14604 current_function_decl, so cope. */
14605 if (fndecl
== NULL_TREE
)
14606 return error_mark_node
;
14608 if (c_dialect_objc ())
14609 objc_finish_function ();
14611 record_key_method_defined (fndecl
);
14613 fntype
= TREE_TYPE (fndecl
);
14615 /* TREE_READONLY (fndecl) = 1;
14616 This caused &foo to be of type ptr-to-const-function
14617 which then got a warning when stored in a ptr-to-function variable. */
14619 gcc_assert (building_stmt_list_p ());
14620 /* The current function is being defined, so its DECL_INITIAL should
14621 be set, and unless there's a multiple definition, it should be
14622 error_mark_node. */
14623 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14625 /* For a cloned function, we've already got all the code we need;
14626 there's no need to add any extra bits. */
14627 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14629 /* Make it so that `main' always returns 0 by default. */
14630 if (DECL_MAIN_P (current_function_decl
))
14631 finish_return_stmt (integer_zero_node
);
14633 if (use_eh_spec_block (current_function_decl
))
14634 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14635 (TREE_TYPE (current_function_decl
)),
14636 current_eh_spec_block
);
14639 /* If we're saving up tree structure, tie off the function now. */
14640 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14642 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14643 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14645 finish_fname_decls ();
14647 /* If this function can't throw any exceptions, remember that. */
14648 if (!processing_template_decl
14649 && !cp_function_chain
->can_throw
14650 && !flag_non_call_exceptions
14651 && !decl_replaceable_p (fndecl
))
14652 TREE_NOTHROW (fndecl
) = 1;
14654 /* This must come after expand_function_end because cleanups might
14655 have declarations (from inline functions) that need to go into
14656 this function's blocks. */
14658 /* If the current binding level isn't the outermost binding level
14659 for this function, either there is a bug, or we have experienced
14660 syntax errors and the statement tree is malformed. */
14661 if (current_binding_level
->kind
!= sk_function_parms
)
14663 /* Make sure we have already experienced errors. */
14664 gcc_assert (errorcount
);
14666 /* Throw away the broken statement tree and extra binding
14668 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14670 while (current_binding_level
->kind
!= sk_function_parms
)
14672 if (current_binding_level
->kind
== sk_class
)
14673 pop_nested_class ();
14675 poplevel (0, 0, 0);
14678 poplevel (1, 0, 1);
14680 /* Statements should always be full-expressions at the outermost set
14681 of curly braces for a function. */
14682 gcc_assert (stmts_are_full_exprs_p ());
14684 /* If there are no return statements in a function with auto return type,
14685 the return type is void. But if the declared type is something like
14686 auto*, this is an error. */
14687 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14688 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14690 if (!is_auto (current_function_auto_return_pattern
)
14691 && !current_function_returns_value
&& !current_function_returns_null
)
14693 error ("no return statements in function returning %qT",
14694 current_function_auto_return_pattern
);
14695 inform (input_location
, "only plain %<auto%> return type can be "
14696 "deduced to %<void%>");
14698 apply_deduced_return_type (fndecl
, void_type_node
);
14699 fntype
= TREE_TYPE (fndecl
);
14702 // If this is a concept, check that the definition is reasonable.
14703 if (DECL_DECLARED_CONCEPT_P (fndecl
))
14704 check_function_concept (fndecl
);
14706 /* Save constexpr function body before it gets munged by
14707 the NRV transformation. */
14708 maybe_save_function_definition (fndecl
);
14710 /* Invoke the pre-genericize plugin before we start munging things. */
14711 if (!processing_template_decl
)
14712 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14714 /* Perform delayed folding before NRV transformation. */
14715 if (!processing_template_decl
)
14716 cp_fold_function (fndecl
);
14718 /* Set up the named return value optimization, if we can. Candidate
14719 variables are selected in check_return_expr. */
14720 if (current_function_return_value
)
14722 tree r
= current_function_return_value
;
14725 if (r
!= error_mark_node
14726 /* This is only worth doing for fns that return in memory--and
14727 simpler, since we don't have to worry about promoted modes. */
14728 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14729 /* Only allow this for variables declared in the outer scope of
14730 the function so we know that their lifetime always ends with a
14731 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14732 we were to do this optimization in tree-ssa. */
14733 && (outer
= outer_curly_brace_block (fndecl
))
14734 && chain_member (r
, BLOCK_VARS (outer
)))
14735 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14737 current_function_return_value
= NULL_TREE
;
14740 /* Remember that we were in class scope. */
14741 if (current_class_name
)
14742 ctype
= current_class_type
;
14744 /* Must mark the RESULT_DECL as being in this function. */
14745 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14747 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14748 to the FUNCTION_DECL node itself. */
14749 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14751 /* Save away current state, if appropriate. */
14752 if (!processing_template_decl
)
14753 save_function_data (fndecl
);
14755 /* Complain if there's just no return statement. */
14756 if (warn_return_type
14757 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14758 && !dependent_type_p (TREE_TYPE (fntype
))
14759 && !current_function_returns_value
&& !current_function_returns_null
14760 /* Don't complain if we abort or throw. */
14761 && !current_function_returns_abnormally
14762 /* Don't complain if there's an infinite loop. */
14763 && !current_function_infinite_loop
14764 /* Don't complain if we are declared noreturn. */
14765 && !TREE_THIS_VOLATILE (fndecl
)
14766 && !DECL_NAME (DECL_RESULT (fndecl
))
14767 && !TREE_NO_WARNING (fndecl
)
14768 /* Structor return values (if any) are set by the compiler. */
14769 && !DECL_CONSTRUCTOR_P (fndecl
)
14770 && !DECL_DESTRUCTOR_P (fndecl
)
14771 && targetm
.warn_func_return (fndecl
))
14773 warning (OPT_Wreturn_type
,
14774 "no return statement in function returning non-void");
14775 TREE_NO_WARNING (fndecl
) = 1;
14778 /* Store the end of the function, so that we get good line number
14779 info for the epilogue. */
14780 cfun
->function_end_locus
= input_location
;
14782 /* Complain about parameters that are only set, but never otherwise used. */
14783 if (warn_unused_but_set_parameter
14784 && !processing_template_decl
14785 && errorcount
== unused_but_set_errorcount
14786 && !DECL_CLONED_FUNCTION_P (fndecl
))
14790 for (decl
= DECL_ARGUMENTS (fndecl
);
14792 decl
= DECL_CHAIN (decl
))
14793 if (TREE_USED (decl
)
14794 && TREE_CODE (decl
) == PARM_DECL
14795 && !DECL_READ_P (decl
)
14796 && DECL_NAME (decl
)
14797 && !DECL_ARTIFICIAL (decl
)
14798 && !TREE_NO_WARNING (decl
)
14799 && !DECL_IN_SYSTEM_HEADER (decl
)
14800 && TREE_TYPE (decl
) != error_mark_node
14801 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14802 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14803 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14804 warning_at (DECL_SOURCE_LOCATION (decl
),
14805 OPT_Wunused_but_set_parameter
,
14806 "parameter %qD set but not used", decl
);
14807 unused_but_set_errorcount
= errorcount
;
14810 /* Complain about locally defined typedefs that are not used in this
14812 maybe_warn_unused_local_typedefs ();
14814 /* Possibly warn about unused parameters. */
14815 if (warn_unused_parameter
14816 && !processing_template_decl
14817 && !DECL_CLONED_FUNCTION_P (fndecl
))
14818 do_warn_unused_parameter (fndecl
);
14820 /* Genericize before inlining. */
14821 if (!processing_template_decl
)
14823 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14824 cp_genericize (fndecl
);
14825 /* Clear out the bits we don't need. */
14826 f
->x_current_class_ptr
= NULL
;
14827 f
->x_current_class_ref
= NULL
;
14828 f
->x_eh_spec_block
= NULL
;
14829 f
->x_in_charge_parm
= NULL
;
14830 f
->x_vtt_parm
= NULL
;
14831 f
->x_return_value
= NULL
;
14832 f
->bindings
= NULL
;
14833 f
->extern_decl_map
= NULL
;
14834 f
->infinite_loops
= NULL
;
14836 /* Clear out the bits we don't need. */
14837 local_names
= NULL
;
14839 /* We're leaving the context of this function, so zap cfun. It's still in
14840 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14842 current_function_decl
= NULL
;
14844 /* If this is an in-class inline definition, we may have to pop the
14845 bindings for the template parameters that we added in
14846 maybe_begin_member_template_processing when start_function was
14848 if (inclass_inline
)
14849 maybe_end_member_template_processing ();
14851 /* Leave the scope of the class. */
14853 pop_nested_class ();
14858 current_function_decl
= NULL_TREE
;
14860 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14864 /* Create the FUNCTION_DECL for a function definition.
14865 DECLSPECS and DECLARATOR are the parts of the declaration;
14866 they describe the return type and the name of the function,
14867 but twisted together in a fashion that parallels the syntax of C.
14869 This function creates a binding context for the function body
14870 as well as setting up the FUNCTION_DECL in current_function_decl.
14872 Returns a FUNCTION_DECL on success.
14874 If the DECLARATOR is not suitable for a function (it defines a datum
14875 instead), we return 0, which tells yyparse to report a parse error.
14877 May return void_type_node indicating that this method is actually
14878 a friend. See grokfield for more details.
14880 Came here with a `.pushlevel' .
14882 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14883 CHANGES TO CODE IN `grokfield'. */
14886 grokmethod (cp_decl_specifier_seq
*declspecs
,
14887 const cp_declarator
*declarator
, tree attrlist
)
14889 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14892 if (fndecl
== error_mark_node
)
14893 return error_mark_node
;
14895 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14897 error ("invalid member function declaration");
14898 return error_mark_node
;
14902 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14904 /* Pass friends other than inline friend functions back. */
14905 if (fndecl
== void_type_node
)
14908 if (DECL_IN_AGGR_P (fndecl
))
14910 if (DECL_CLASS_SCOPE_P (fndecl
))
14911 error ("%qD is already defined in class %qT", fndecl
,
14912 DECL_CONTEXT (fndecl
));
14913 return error_mark_node
;
14916 check_template_shadow (fndecl
);
14918 if (TREE_PUBLIC (fndecl
))
14919 DECL_COMDAT (fndecl
) = 1;
14920 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14921 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14923 /* We process method specializations in finish_struct_1. */
14924 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14926 fndecl
= push_template_decl (fndecl
);
14927 if (fndecl
== error_mark_node
)
14931 if (! DECL_FRIEND_P (fndecl
))
14933 if (DECL_CHAIN (fndecl
))
14935 fndecl
= copy_node (fndecl
);
14936 TREE_CHAIN (fndecl
) = NULL_TREE
;
14940 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14942 DECL_IN_AGGR_P (fndecl
) = 1;
14947 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14948 we can lay it out later, when and if its type becomes complete.
14950 Also handle constexpr variables where the initializer involves
14951 an unlowered PTRMEM_CST because the class isn't complete yet. */
14954 maybe_register_incomplete_var (tree var
)
14956 gcc_assert (VAR_P (var
));
14958 /* Keep track of variables with incomplete types. */
14959 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14960 && DECL_EXTERNAL (var
))
14962 tree inner_type
= TREE_TYPE (var
);
14964 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14965 inner_type
= TREE_TYPE (inner_type
);
14966 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14968 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14969 /* RTTI TD entries are created while defining the type_info. */
14970 || (TYPE_LANG_SPECIFIC (inner_type
)
14971 && TYPE_BEING_DEFINED (inner_type
)))
14973 incomplete_var iv
= {var
, inner_type
};
14974 vec_safe_push (incomplete_vars
, iv
);
14976 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14977 && decl_constant_var_p (var
)
14978 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14980 /* When the outermost open class is complete we can resolve any
14981 pointers-to-members. */
14982 tree context
= outermost_open_class ();
14983 incomplete_var iv
= {var
, context
};
14984 vec_safe_push (incomplete_vars
, iv
);
14989 /* Called when a class type (given by TYPE) is defined. If there are
14990 any existing VAR_DECLs whose type has been completed by this
14991 declaration, update them now. */
14994 complete_vars (tree type
)
14997 incomplete_var
*iv
;
14999 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
15001 if (same_type_p (type
, iv
->incomplete_type
))
15003 tree var
= iv
->decl
;
15004 tree type
= TREE_TYPE (var
);
15006 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
15007 == iv
->incomplete_type
)
15009 /* Complete the type of the variable. The VAR_DECL itself
15010 will be laid out in expand_expr. */
15011 complete_type (type
);
15012 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
15015 /* Remove this entry from the list. */
15016 incomplete_vars
->unordered_remove (ix
);
15022 /* Check for pending declarations which may have abstract type. */
15023 complete_type_check_abstract (type
);
15026 /* If DECL is of a type which needs a cleanup, build and return an
15027 expression to perform that cleanup here. Return NULL_TREE if no
15028 cleanup need be done. DECL can also be a _REF when called from
15029 split_nonconstant_init_1. */
15032 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
15038 /* Assume no cleanup is required. */
15039 cleanup
= NULL_TREE
;
15041 if (error_operand_p (decl
))
15044 /* Handle "__attribute__((cleanup))". We run the cleanup function
15045 before the destructor since the destructor is what actually
15046 terminates the lifetime of the object. */
15048 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
15057 /* Get the name specified by the user for the cleanup function. */
15058 id
= TREE_VALUE (TREE_VALUE (attr
));
15059 /* Look up the name to find the cleanup function to call. It is
15060 important to use lookup_name here because that is what is
15061 used in c-common.c:handle_cleanup_attribute when performing
15062 initial checks on the attribute. Note that those checks
15063 include ensuring that the function found is not an overloaded
15064 function, or an object with an overloaded call operator,
15065 etc.; we can rely on the fact that the function found is an
15066 ordinary FUNCTION_DECL. */
15067 fn
= lookup_name (id
);
15068 arg
= build_address (decl
);
15069 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
15070 return error_mark_node
;
15071 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
15072 if (cleanup
== error_mark_node
)
15073 return error_mark_node
;
15075 /* Handle ordinary C++ destructors. */
15076 type
= TREE_TYPE (decl
);
15077 if (type_build_dtor_call (type
))
15079 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
15083 if (TREE_CODE (type
) == ARRAY_TYPE
)
15086 addr
= build_address (decl
);
15088 call
= build_delete (TREE_TYPE (addr
), addr
,
15089 sfk_complete_destructor
, flags
, 0, complain
);
15090 if (call
== error_mark_node
)
15091 cleanup
= error_mark_node
;
15092 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
15093 /* Discard the call. */;
15095 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
15100 /* build_delete sets the location of the destructor call to the
15101 current location, even though the destructor is going to be
15102 called later, at the end of the current scope. This can lead to
15103 a "jumpy" behavior for users of debuggers when they step around
15104 the end of the block. So let's unset the location of the
15105 destructor call instead. */
15106 protected_set_expr_location (cleanup
, UNKNOWN_LOCATION
);
15110 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
15111 /* Treat objects with destructors as used; the destructor may do
15112 something substantive. */
15113 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
15114 return error_mark_node
;
15120 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
15121 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
15122 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
15125 static_fn_type (tree memfntype
)
15130 if (TYPE_PTRMEMFUNC_P (memfntype
))
15131 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
15132 if (POINTER_TYPE_P (memfntype
)
15133 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
15134 memfntype
= TREE_TYPE (memfntype
);
15135 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
15137 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
15138 args
= TYPE_ARG_TYPES (memfntype
);
15139 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
15140 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
15141 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
15142 fntype
= (cp_build_type_attribute_variant
15143 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
15144 fntype
= (build_exception_variant
15145 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
15146 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
15147 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
15151 /* DECL was originally constructed as a non-static member function,
15152 but turned out to be static. Update it accordingly. */
15155 revert_static_member_fn (tree decl
)
15157 tree stype
= static_fn_type (decl
);
15158 cp_cv_quals quals
= type_memfn_quals (stype
);
15159 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
15161 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
15162 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
15164 TREE_TYPE (decl
) = stype
;
15166 if (DECL_ARGUMENTS (decl
))
15167 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
15168 DECL_STATIC_FUNCTION_P (decl
) = 1;
15171 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
15172 one of the language-independent trees. */
15174 enum cp_tree_node_structure_enum
15175 cp_tree_node_structure (union lang_tree_node
* t
)
15177 switch (TREE_CODE (&t
->generic
))
15179 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
15180 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
15181 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
15182 case OVERLOAD
: return TS_CP_OVERLOAD
;
15183 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
15184 case PTRMEM_CST
: return TS_CP_PTRMEM
;
15185 case BASELINK
: return TS_CP_BASELINK
;
15186 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
15187 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
15188 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
15189 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
15190 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
15191 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
15192 case CONSTRAINT_INFO
: return TS_CP_CONSTRAINT_INFO
;
15193 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
15194 default: return TS_CP_GENERIC
;
15198 /* Build the void_list_node (void_type_node having been created). */
15200 build_void_list_node (void)
15202 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
15207 cp_missing_noreturn_ok_p (tree decl
)
15209 /* A missing noreturn is ok for the `main' function. */
15210 return DECL_MAIN_P (decl
);
15213 /* Return the decl used to identify the COMDAT group into which DECL should
15217 cxx_comdat_group (tree decl
)
15219 /* Virtual tables, construction virtual tables, and virtual table
15220 tables all go in a single COMDAT group, named after the primary
15222 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
15223 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
15224 /* For all other DECLs, the COMDAT group is the mangled name of the
15225 declaration itself. */
15228 while (DECL_THUNK_P (decl
))
15230 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
15231 into the same section as the target function. In that case
15232 we must return target's name. */
15233 tree target
= THUNK_TARGET (decl
);
15234 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
15235 && DECL_SECTION_NAME (target
) != NULL
15236 && DECL_ONE_ONLY (target
))
15246 /* Returns the return type for FN as written by the user, which may include
15247 a placeholder for a deduced return type. */
15250 fndecl_declared_return_type (tree fn
)
15252 fn
= STRIP_TEMPLATE (fn
);
15253 if (FNDECL_USED_AUTO (fn
))
15255 struct language_function
*f
= NULL
;
15256 if (DECL_STRUCT_FUNCTION (fn
))
15257 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
15259 f
= DECL_SAVED_FUNCTION_DATA (fn
);
15260 return f
->x_auto_return_pattern
;
15262 return TREE_TYPE (TREE_TYPE (fn
));
15265 /* Returns true iff DECL was declared with an auto return type and it has
15266 not yet been deduced to a real type. */
15269 undeduced_auto_decl (tree decl
)
15271 if (cxx_dialect
< cxx14
)
15273 return type_uses_auto (TREE_TYPE (decl
));
15276 /* Complain if DECL has an undeduced return type. */
15279 require_deduced_type (tree decl
)
15281 if (undeduced_auto_decl (decl
))
15282 error ("use of %qD before deduction of %<auto%>", decl
);
15285 #include "gt-cp-decl.h"