1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
33 #include "c-family/c-target.h"
36 #include "c-family/c-common.h"
39 #include "stringpool.h"
41 #include "tree-hasher.h"
42 #include "stor-layout.h"
47 #include "tree-iterator.h"
48 #include "tree-inline.h"
52 #include "c-family/c-objc.h"
53 #include "c-family/c-pragma.h"
54 #include "c-family/c-ubsan.h"
60 /* Possible cases of bad specifiers type used by bad_specifiers. */
62 BSP_VAR
, /* variable */
63 BSP_PARM
, /* parameter */
68 static const char *redeclaration_error_message (tree
, tree
);
70 static int decl_jump_unsafe (tree
);
71 static void require_complete_types_for_parms (tree
);
72 static int ambi_op_p (enum tree_code
);
73 static int unary_op_p (enum tree_code
);
74 static void push_local_name (tree
);
75 static tree
grok_reference_init (tree
, tree
, tree
, int);
76 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
78 static int check_static_variable_definition (tree
, tree
);
79 static void record_unknown_type (tree
, const char *);
80 static tree
builtin_function_1 (tree
, tree
, bool);
81 static int member_function_or_else (tree
, tree
, enum overload_flags
);
82 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree
);
85 static tree
local_variable_p_walkfn (tree
*, int *, void *);
86 static tree
record_builtin_java_type (const char *, int);
87 static const char *tag_name (enum tag_types
);
88 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
89 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
90 static void maybe_deduce_size_from_array_init (tree
, tree
);
91 static void layout_var_decl (tree
);
92 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
93 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
94 static void save_function_data (tree
);
95 static void copy_type_enum (tree
, tree
);
96 static void check_function_type (tree
, tree
);
97 static void finish_constructor_body (void);
98 static void begin_destructor_body (void);
99 static void finish_destructor_body (void);
100 static void record_key_method_defined (tree
);
101 static tree
create_array_type_for_decl (tree
, tree
, tree
);
102 static tree
get_atexit_node (void);
103 static tree
get_dso_handle_node (void);
104 static tree
start_cleanup_fn (void);
105 static void end_cleanup_fn (void);
106 static tree
cp_make_fname_decl (location_t
, tree
, int);
107 static void initialize_predefined_identifiers (void);
108 static tree check_special_function_return_type
109 (special_function_kind
, tree
, tree
, int, const location_t
*);
110 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
111 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
112 static void store_parm_decls (tree
);
113 static void initialize_local_var (tree
, tree
);
114 static void expand_static_init (tree
, tree
);
116 /* The following symbols are subsumed in the cp_global_trees array, and
117 listed here individually for documentation purposes.
120 tree wchar_decl_node;
122 tree vtable_entry_type;
123 tree delta_type_node;
124 tree __t_desc_type_node;
126 tree class_type_node;
127 tree unknown_type_node;
129 Array type `vtable_entry_type[]'
132 tree vtbl_ptr_type_node;
139 A FUNCTION_DECL which can call `abort'. Not necessarily the
140 one that the user will declare, but sufficient to be called
141 by routines that want to abort the program.
146 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
147 tree tinfo_var_id; */
149 tree cp_global_trees
[CPTI_MAX
];
151 /* Indicates that there is a type value in some namespace, although
152 that is not necessarily in scope at the moment. */
154 tree global_type_node
;
156 /* The node that holds the "name" of the global scope. */
157 tree global_scope_name
;
159 #define local_names cp_function_chain->x_local_names
161 /* A list of objects which have constructors or destructors
162 which reside in the global scope. The decl is stored in
163 the TREE_VALUE slot and the initializer is stored
164 in the TREE_PURPOSE slot. */
165 tree static_aggregates
;
167 /* Like static_aggregates, but for thread_local variables. */
172 /* A node for the integer constant 2. */
174 tree integer_two_node
;
176 /* Used only for jumps to as-yet undefined labels, since jumps to
177 defined labels can have their validity checked immediately. */
179 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
180 struct named_label_use_entry
*next
;
181 /* The binding level to which this entry is *currently* attached.
182 This is initially the binding level in which the goto appeared,
183 but is modified as scopes are closed. */
184 cp_binding_level
*binding_level
;
185 /* The head of the names list that was current when the goto appeared,
186 or the inner scope popped. These are the decls that will *not* be
187 skipped when jumping to the label. */
189 /* The location of the goto, for error reporting. */
190 location_t o_goto_locus
;
191 /* True if an OpenMP structured block scope has been closed since
192 the goto appeared. This means that the branch from the label will
193 illegally exit an OpenMP scope. */
197 /* A list of all LABEL_DECLs in the function that have names. Here so
198 we can clear out their names' definitions at the end of the
199 function, and so we can check the validity of jumps to these labels. */
201 struct GTY((for_user
)) named_label_entry
{
202 /* The decl itself. */
205 /* The binding level to which the label is *currently* attached.
206 This is initially set to the binding level in which the label
207 is defined, but is modified as scopes are closed. */
208 cp_binding_level
*binding_level
;
209 /* The head of the names list that was current when the label was
210 defined, or the inner scope popped. These are the decls that will
211 be skipped when jumping to the label. */
213 /* A vector of all decls from all binding levels that would be
214 crossed by a backward branch to the label. */
215 vec
<tree
, va_gc
> *bad_decls
;
217 /* A list of uses of the label, before the label is defined. */
218 struct named_label_use_entry
*uses
;
220 /* The following bits are set after the label is defined, and are
221 updated as scopes are popped. They indicate that a backward jump
222 to the label will illegally enter a scope of the given flavor. */
226 bool in_transaction_scope
;
229 #define named_labels cp_function_chain->x_named_labels
231 /* The number of function bodies which we are currently processing.
232 (Zero if we are at namespace scope, one inside the body of a
233 function, two inside the body of a function in a local class, etc.) */
236 /* To avoid unwanted recursion, finish_function defers all mark_used calls
237 encountered during its execution until it finishes. */
238 bool defer_mark_used_calls
;
239 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
241 /* States indicating how grokdeclarator() should handle declspecs marked
242 with __attribute__((deprecated)). An object declared as
243 __attribute__((deprecated)) suppresses warnings of uses of other
245 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
248 /* A list of VAR_DECLs whose type was incomplete at the time the
249 variable was declared. */
251 struct GTY(()) incomplete_var
{
253 tree incomplete_type
;
257 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
259 /* Returns the kind of template specialization we are currently
260 processing, given that it's declaration contained N_CLASS_SCOPES
261 explicit scope qualifications. */
264 current_tmpl_spec_kind (int n_class_scopes
)
266 int n_template_parm_scopes
= 0;
267 int seen_specialization_p
= 0;
268 int innermost_specialization_p
= 0;
271 /* Scan through the template parameter scopes. */
272 for (b
= current_binding_level
;
273 b
->kind
== sk_template_parms
;
276 /* If we see a specialization scope inside a parameter scope,
277 then something is wrong. That corresponds to a declaration
280 template <class T> template <> ...
282 which is always invalid since [temp.expl.spec] forbids the
283 specialization of a class member template if the enclosing
284 class templates are not explicitly specialized as well. */
285 if (b
->explicit_spec_p
)
287 if (n_template_parm_scopes
== 0)
288 innermost_specialization_p
= 1;
290 seen_specialization_p
= 1;
292 else if (seen_specialization_p
== 1)
293 return tsk_invalid_member_spec
;
295 ++n_template_parm_scopes
;
298 /* Handle explicit instantiations. */
299 if (processing_explicit_instantiation
)
301 if (n_template_parm_scopes
!= 0)
302 /* We've seen a template parameter list during an explicit
303 instantiation. For example:
305 template <class T> template void f(int);
307 This is erroneous. */
308 return tsk_invalid_expl_inst
;
310 return tsk_expl_inst
;
313 if (n_template_parm_scopes
< n_class_scopes
)
314 /* We've not seen enough template headers to match all the
315 specialized classes present. For example:
317 template <class T> void R<T>::S<T>::f(int);
319 This is invalid; there needs to be one set of template
320 parameters for each class. */
321 return tsk_insufficient_parms
;
322 else if (n_template_parm_scopes
== n_class_scopes
)
323 /* We're processing a non-template declaration (even though it may
324 be a member of a template class.) For example:
326 template <class T> void S<T>::f(int);
328 The `class T' matches the `S<T>', leaving no template headers
329 corresponding to the `f'. */
331 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
332 /* We've got too many template headers. For example:
334 template <> template <class T> void f (T);
336 There need to be more enclosing classes. */
337 return tsk_excessive_parms
;
339 /* This must be a template. It's of the form:
341 template <class T> template <class U> void S<T>::f(U);
343 This is a specialization if the innermost level was a
344 specialization; otherwise it's just a definition of the
346 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
349 /* Exit the current scope. */
357 /* When a label goes out of scope, check to see if that label was used
358 in a valid manner, and issue any appropriate warnings or errors. */
361 pop_label (tree label
, tree old_value
)
363 if (!processing_template_decl
)
365 if (DECL_INITIAL (label
) == NULL_TREE
)
369 error ("label %q+D used but not defined", label
);
370 location
= input_location
;
371 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
372 /* Avoid crashing later. */
373 define_label (location
, DECL_NAME (label
));
376 warn_for_unused_label (label
);
379 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
382 /* At the end of a function, all labels declared within the function
383 go out of scope. BLOCK is the top-level block for the
387 pop_labels_1 (named_label_entry
**slot
, tree block
)
389 struct named_label_entry
*ent
= *slot
;
391 pop_label (ent
->label_decl
, NULL_TREE
);
393 /* Put the labels into the "variables" of the top-level block,
394 so debugger can see them. */
395 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
396 BLOCK_VARS (block
) = ent
->label_decl
;
398 named_labels
->clear_slot (slot
);
404 pop_labels (tree block
)
408 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
413 /* At the end of a block with local labels, restore the outer definition. */
416 pop_local_label (tree label
, tree old_value
)
418 struct named_label_entry dummy
;
420 pop_label (label
, old_value
);
422 dummy
.label_decl
= label
;
423 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
424 named_labels
->clear_slot (slot
);
427 /* The following two routines are used to interface to Objective-C++.
428 The binding level is purposely treated as an opaque type. */
431 objc_get_current_scope (void)
433 return current_binding_level
;
436 /* The following routine is used by the NeXT-style SJLJ exceptions;
437 variables get marked 'volatile' so as to not be clobbered by
438 _setjmp()/_longjmp() calls. All variables in the current scope,
439 as well as parent scopes up to (but not including) ENCLOSING_BLK
440 shall be thusly marked. */
443 objc_mark_locals_volatile (void *enclosing_blk
)
445 cp_binding_level
*scope
;
447 for (scope
= current_binding_level
;
448 scope
&& scope
!= enclosing_blk
;
449 scope
= scope
->level_chain
)
453 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
454 objc_volatilize_decl (decl
);
456 /* Do not climb up past the current function. */
457 if (scope
->kind
== sk_function_parms
)
462 /* Update data for defined and undefined labels when leaving a scope. */
465 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
467 named_label_entry
*ent
= *slot
;
468 cp_binding_level
*obl
= bl
->level_chain
;
470 if (ent
->binding_level
== bl
)
474 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
475 TREE_LISTs representing OVERLOADs, so be careful. */
476 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
478 : TREE_CHAIN (decl
)))
479 if (decl_jump_unsafe (decl
))
480 vec_safe_push (ent
->bad_decls
, decl
);
482 ent
->binding_level
= obl
;
483 ent
->names_in_scope
= obl
->names
;
487 ent
->in_try_scope
= true;
490 ent
->in_catch_scope
= true;
493 ent
->in_omp_scope
= true;
496 ent
->in_transaction_scope
= true;
504 struct named_label_use_entry
*use
;
506 for (use
= ent
->uses
; use
; use
= use
->next
)
507 if (use
->binding_level
== bl
)
509 use
->binding_level
= obl
;
510 use
->names_in_scope
= obl
->names
;
511 if (bl
->kind
== sk_omp
)
512 use
->in_omp_scope
= true;
519 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
520 when errors were reported, except for -Werror-unused-but-set-*. */
521 static int unused_but_set_errorcount
;
523 /* Exit a binding level.
524 Pop the level off, and restore the state of the identifier-decl mappings
525 that were in effect when this level was entered.
527 If KEEP == 1, this level had explicit declarations, so
528 and create a "block" (a BLOCK node) for the level
529 to record its declarations and subblocks for symbol table output.
531 If FUNCTIONBODY is nonzero, this level is the body of a function,
532 so create a block as if KEEP were set and also clear out all
535 If REVERSE is nonzero, reverse the order of decls before putting
536 them into the BLOCK. */
539 poplevel (int keep
, int reverse
, int functionbody
)
542 /* The chain of decls was accumulated in reverse order.
543 Put it into forward order, just for cleanliness. */
548 int leaving_for_scope
;
551 cp_label_binding
*label_bind
;
553 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
558 gcc_assert (current_binding_level
->kind
!= sk_class
);
560 if (current_binding_level
->kind
== sk_cleanup
)
562 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
564 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
566 /* We used to use KEEP == 2 to indicate that the new block should go
567 at the beginning of the list of blocks at this binding level,
568 rather than the end. This hack is no longer used. */
569 gcc_assert (keep
== 0 || keep
== 1);
571 if (current_binding_level
->keep
)
574 /* Any uses of undefined labels, and any defined labels, now operate
575 under constraints of next binding contour. */
576 if (cfun
&& !functionbody
&& named_labels
)
577 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
578 (current_binding_level
);
580 /* Get the decls in the order they were written.
581 Usually current_binding_level->names is in reverse order.
582 But parameter decls were previously put in forward order. */
585 current_binding_level
->names
586 = decls
= nreverse (current_binding_level
->names
);
588 decls
= current_binding_level
->names
;
590 /* If there were any declarations or structure tags in that level,
591 or if this level is a function body,
592 create a BLOCK to record them for the life of this function. */
594 /* Avoid function body block if possible. */
595 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
597 else if (keep
== 1 || functionbody
)
598 block
= make_node (BLOCK
);
599 if (block
!= NULL_TREE
)
601 BLOCK_VARS (block
) = decls
;
602 BLOCK_SUBBLOCKS (block
) = subblocks
;
605 /* In each subblock, record that this is its superior. */
607 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
608 BLOCK_SUPERCONTEXT (link
) = block
;
610 /* We still support the old for-scope rules, whereby the variables
611 in a for-init statement were in scope after the for-statement
612 ended. We only use the new rules if flag_new_for_scope is
615 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
617 /* Before we remove the declarations first check for unused variables. */
618 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
619 && current_binding_level
->kind
!= sk_template_parms
620 && !processing_template_decl
)
621 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
623 /* There are cases where D itself is a TREE_LIST. See in
624 push_local_binding where the list of decls returned by
625 getdecls is built. */
626 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
627 tree type
= TREE_TYPE (decl
);
629 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
630 && ! DECL_IN_SYSTEM_HEADER (decl
)
631 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
632 && type
!= error_mark_node
633 && (!CLASS_TYPE_P (type
)
634 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
635 || lookup_attribute ("warn_unused",
636 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
638 if (! TREE_USED (decl
))
639 warning_at (DECL_SOURCE_LOCATION (decl
),
640 OPT_Wunused_variable
, "unused variable %qD", decl
);
641 else if (DECL_CONTEXT (decl
) == current_function_decl
642 // For -Wunused-but-set-variable leave references alone.
643 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
644 && errorcount
== unused_but_set_errorcount
)
646 warning_at (DECL_SOURCE_LOCATION (decl
),
647 OPT_Wunused_but_set_variable
,
648 "variable %qD set but not used", decl
);
649 unused_but_set_errorcount
= errorcount
;
654 /* Remove declarations for all the DECLs in this level. */
655 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
657 if (leaving_for_scope
&& VAR_P (link
)
658 /* It's hard to make this ARM compatibility hack play nicely with
659 lambdas, and it really isn't necessary in C++11 mode. */
660 && cxx_dialect
< cxx11
663 tree name
= DECL_NAME (link
);
667 ob
= outer_binding (name
,
668 IDENTIFIER_BINDING (name
),
671 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
673 ns_binding
= NULL_TREE
;
675 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
676 /* We have something like:
681 and we are leaving the `for' scope. There's no reason to
682 keep the binding of the inner `i' in this case. */
683 pop_binding (name
, link
);
684 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
685 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
686 /* Here, we have something like:
694 We must pop the for-scope binding so we know what's a
695 type and what isn't. */
696 pop_binding (name
, link
);
699 /* Mark this VAR_DECL as dead so that we can tell we left it
700 there only for backward compatibility. */
701 DECL_DEAD_FOR_LOCAL (link
) = 1;
703 /* Keep track of what should have happened when we
704 popped the binding. */
707 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
708 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
711 /* Add it to the list of dead variables in the next
712 outermost binding to that we can remove these when we
713 leave that binding. */
715 current_binding_level
->level_chain
->dead_vars_from_for
,
718 /* Although we don't pop the cxx_binding, we do clear
719 its SCOPE since the scope is going away now. */
720 IDENTIFIER_BINDING (name
)->scope
721 = current_binding_level
->level_chain
;
728 /* Remove the binding. */
731 if (TREE_CODE (decl
) == TREE_LIST
)
732 decl
= TREE_VALUE (decl
);
735 if (TREE_CODE (name
) == OVERLOAD
)
736 name
= OVL_FUNCTION (name
);
738 gcc_assert (DECL_P (name
));
739 pop_binding (DECL_NAME (name
), decl
);
743 /* Remove declarations for any `for' variables from inner scopes
744 that we kept around. */
745 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
747 pop_binding (DECL_NAME (decl
), decl
);
749 /* Restore the IDENTIFIER_TYPE_VALUEs. */
750 for (link
= current_binding_level
->type_shadowed
;
751 link
; link
= TREE_CHAIN (link
))
752 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
754 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
755 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
757 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
759 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
760 list if a `using' declaration put them there. The debugging
761 back ends won't understand OVERLOAD, so we remove them here.
762 Because the BLOCK_VARS are (temporarily) shared with
763 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
764 popped all the bindings. */
769 for (d
= &BLOCK_VARS (block
); *d
; )
771 if (TREE_CODE (*d
) == TREE_LIST
)
772 *d
= TREE_CHAIN (*d
);
774 d
= &DECL_CHAIN (*d
);
778 /* If the level being exited is the top level of a function,
779 check over all the labels. */
784 /* Since this is the top level block of a function, the vars are
785 the function's parameters. Don't leave them in the BLOCK
786 because they are found in the FUNCTION_DECL instead. */
787 BLOCK_VARS (block
) = 0;
791 pop_labels (subblocks
);
794 kind
= current_binding_level
->kind
;
795 if (kind
== sk_cleanup
)
799 /* If this is a temporary binding created for a cleanup, then we'll
800 have pushed a statement list level. Pop that, create a new
801 BIND_EXPR for the block, and insert it into the stream. */
802 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
803 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
810 /* The current function is being defined, so its DECL_INITIAL
811 should be error_mark_node. */
812 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
813 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
816 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
818 if (BLOCK_SUBBLOCKS (subblocks
))
819 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
822 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
826 current_binding_level
->blocks
827 = block_chainon (current_binding_level
->blocks
, block
);
829 /* If we did not make a block for the level just exited,
830 any blocks made for inner levels
831 (since they cannot be recorded as subblocks in that level)
832 must be carried forward so they will later become subblocks
833 of something else. */
835 current_binding_level
->blocks
836 = block_chainon (current_binding_level
->blocks
, subblocks
);
838 /* Each and every BLOCK node created here in `poplevel' is important
839 (e.g. for proper debugging information) so if we created one
840 earlier, mark it as "used". */
842 TREE_USED (block
) = 1;
844 /* All temporary bindings created for cleanups are popped silently. */
845 if (kind
== sk_cleanup
)
848 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
852 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
853 itself, calling F for each. The DATA is passed to F as well. */
856 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
859 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
861 result
|= (*f
) (name_space
, data
);
863 for (; current
; current
= DECL_CHAIN (current
))
864 result
|= walk_namespaces_r (current
, f
, data
);
869 /* Walk all the namespaces, calling F for each. The DATA is passed to
873 walk_namespaces (walk_namespaces_fn f
, void* data
)
875 return walk_namespaces_r (global_namespace
, f
, data
);
878 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
881 wrapup_globals_for_namespace (tree name_space
, void* data ATTRIBUTE_UNUSED
)
883 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
884 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
885 tree
*vec
= statics
->address ();
886 int len
= statics
->length ();
888 /* Write out any globals that need to be output. */
889 return wrapup_global_declarations (vec
, len
);
892 /* In C++, you don't have to write `struct S' to refer to `S'; you
893 can just use `S'. We accomplish this by creating a TYPE_DECL as
894 if the user had written `typedef struct S S'. Create and return
895 the TYPE_DECL for TYPE. */
898 create_implicit_typedef (tree name
, tree type
)
902 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
903 DECL_ARTIFICIAL (decl
) = 1;
904 /* There are other implicit type declarations, like the one *within*
905 a class that allows you to write `S::S'. We must distinguish
907 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
908 TYPE_NAME (type
) = decl
;
909 TYPE_STUB_DECL (type
) = decl
;
914 /* Remember a local name for name-mangling purposes. */
917 push_local_name (tree decl
)
922 timevar_start (TV_NAME_LOOKUP
);
924 name
= DECL_NAME (decl
);
926 nelts
= vec_safe_length (local_names
);
927 for (i
= 0; i
< nelts
; i
++)
929 t
= (*local_names
)[i
];
930 if (DECL_NAME (t
) == name
)
932 if (!DECL_LANG_SPECIFIC (decl
))
933 retrofit_lang_decl (decl
);
934 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
935 if (DECL_DISCRIMINATOR_SET_P (t
))
936 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
938 DECL_DISCRIMINATOR (decl
) = 1;
940 (*local_names
)[i
] = decl
;
941 timevar_stop (TV_NAME_LOOKUP
);
946 vec_safe_push (local_names
, decl
);
947 timevar_stop (TV_NAME_LOOKUP
);
950 /* Subroutine of duplicate_decls: return truthvalue of whether
951 or not types of these decls match.
953 For C++, we must compare the parameter list so that `int' can match
954 `int&' in a parameter position, but `int&' is not confused with
958 decls_match (tree newdecl
, tree olddecl
)
962 if (newdecl
== olddecl
)
965 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
966 /* If the two DECLs are not even the same kind of thing, we're not
967 interested in their types. */
970 gcc_assert (DECL_P (newdecl
));
972 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
974 tree f1
= TREE_TYPE (newdecl
);
975 tree f2
= TREE_TYPE (olddecl
);
976 tree p1
= TYPE_ARG_TYPES (f1
);
977 tree p2
= TYPE_ARG_TYPES (f2
);
980 /* Specializations of different templates are different functions
981 even if they have the same type. */
982 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
983 ? DECL_TI_TEMPLATE (newdecl
)
985 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
986 ? DECL_TI_TEMPLATE (olddecl
)
991 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
992 && ! (DECL_EXTERN_C_P (newdecl
)
993 && DECL_EXTERN_C_P (olddecl
)))
996 /* A new declaration doesn't match a built-in one unless it
997 is also extern "C". */
998 if (DECL_IS_BUILTIN (olddecl
)
999 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1002 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1005 /* A declaration with deduced return type should use its pre-deduction
1006 type for declaration matching. */
1007 r2
= fndecl_declared_return_type (olddecl
);
1009 if (same_type_p (TREE_TYPE (f1
), r2
))
1011 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1012 && (DECL_BUILT_IN (olddecl
)
1013 #ifndef NO_IMPLICIT_EXTERN_C
1014 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1015 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1019 types_match
= self_promoting_args_p (p1
);
1020 if (p1
== void_list_node
)
1021 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1023 #ifndef NO_IMPLICIT_EXTERN_C
1024 else if (!prototype_p (f1
)
1025 && (DECL_EXTERN_C_P (olddecl
)
1026 && DECL_IN_SYSTEM_HEADER (olddecl
)
1027 && !DECL_CLASS_SCOPE_P (olddecl
))
1028 && (DECL_EXTERN_C_P (newdecl
)
1029 && DECL_IN_SYSTEM_HEADER (newdecl
)
1030 && !DECL_CLASS_SCOPE_P (newdecl
)))
1032 types_match
= self_promoting_args_p (p2
);
1033 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1039 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1040 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1041 || comp_type_attributes (TREE_TYPE (newdecl
),
1042 TREE_TYPE (olddecl
)) != 0);
1047 /* The decls dont match if they correspond to two different versions
1048 of the same function. Disallow extern "C" functions to be
1049 versions for now. */
1051 && !DECL_EXTERN_C_P (newdecl
)
1052 && !DECL_EXTERN_C_P (olddecl
)
1053 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1055 /* Mark functions as versions if necessary. Modify the mangled decl
1056 name if necessary. */
1057 if (DECL_FUNCTION_VERSIONED (newdecl
)
1058 && DECL_FUNCTION_VERSIONED (olddecl
))
1060 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1062 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1063 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1064 mangle_decl (newdecl
);
1066 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1068 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1069 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1070 mangle_decl (olddecl
);
1072 cgraph_node::record_function_versions (olddecl
, newdecl
);
1076 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1078 tree oldres
= DECL_TEMPLATE_RESULT (olddecl
);
1079 tree newres
= DECL_TEMPLATE_RESULT (newdecl
);
1081 if (TREE_CODE (newres
) != TREE_CODE (oldres
))
1084 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1085 DECL_TEMPLATE_PARMS (olddecl
)))
1088 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1089 types_match
= (same_type_p (TREE_TYPE (oldres
), TREE_TYPE (newres
))
1090 && equivalently_constrained (olddecl
, newdecl
));
1092 // We don't need to check equivalently_constrained for variable and
1093 // function templates because we check it on the results.
1094 types_match
= decls_match (oldres
, newres
);
1098 /* Need to check scope for variable declaration (VAR_DECL).
1099 For typedef (TYPE_DECL), scope is ignored. */
1101 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1103 Two declarations for an object with C language linkage
1104 with the same name (ignoring the namespace that qualify
1105 it) that appear in different namespace scopes refer to
1107 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1110 if (TREE_TYPE (newdecl
) == error_mark_node
)
1111 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1112 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1113 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1114 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1117 types_match
= comptypes (TREE_TYPE (newdecl
),
1118 TREE_TYPE (olddecl
),
1119 COMPARE_REDECLARATION
);
1122 // Normal functions can be constrained, as can variable partial
1124 if (types_match
&& VAR_OR_FUNCTION_DECL_P (newdecl
))
1125 types_match
= equivalently_constrained (newdecl
, olddecl
);
1130 /* If NEWDECL is `static' and an `extern' was seen previously,
1131 warn about it. OLDDECL is the previous declaration.
1133 Note that this does not apply to the C++ case of declaring
1134 a variable `extern const' and then later `const'.
1136 Don't complain about built-in functions, since they are beyond
1137 the user's control. */
1140 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1142 if (TREE_CODE (newdecl
) == TYPE_DECL
1143 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1144 || TREE_CODE (newdecl
) == CONST_DECL
1145 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1148 /* Don't get confused by static member functions; that's a different
1150 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1151 && DECL_STATIC_FUNCTION_P (newdecl
))
1154 /* If the old declaration was `static', or the new one isn't, then
1155 everything is OK. */
1156 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1159 /* It's OK to declare a builtin function as `static'. */
1160 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1161 && DECL_ARTIFICIAL (olddecl
))
1164 if (permerror (DECL_SOURCE_LOCATION (newdecl
),
1165 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1166 inform (DECL_SOURCE_LOCATION (olddecl
),
1167 "previous declaration of %qD", olddecl
);
1170 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1171 function templates. If their exception specifications do not
1172 match, issue a diagnostic. */
1175 check_redeclaration_exception_specification (tree new_decl
,
1178 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1179 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1181 /* Two default specs are equivalent, don't force evaluation. */
1182 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1183 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1186 maybe_instantiate_noexcept (new_decl
);
1187 maybe_instantiate_noexcept (old_decl
);
1188 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1189 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1193 If any declaration of a function has an exception-specification,
1194 all declarations, including the definition and an explicit
1195 specialization, of that function shall have an
1196 exception-specification with the same set of type-ids. */
1197 if (! DECL_IS_BUILTIN (old_decl
)
1199 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1202 = "declaration of %q+F has a different exception specifier";
1203 bool complained
= true;
1204 if (! DECL_IN_SYSTEM_HEADER (old_decl
))
1205 error (msg
, new_decl
);
1207 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1209 inform (0, "from previous declaration %q+F", old_decl
);
1213 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1214 Otherwise issue diagnostics. */
1217 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1219 old_decl
= STRIP_TEMPLATE (old_decl
);
1220 new_decl
= STRIP_TEMPLATE (new_decl
);
1221 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1222 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1224 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1225 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1227 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1229 if (DECL_BUILT_IN (old_decl
))
1231 /* Hide a built-in declaration. */
1232 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1233 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1236 /* 7.1.5 [dcl.constexpr]
1237 Note: An explicit specialization can differ from the template
1238 declaration with respect to the constexpr specifier. */
1239 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1240 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1243 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1244 error ("from previous declaration %q+D", old_decl
);
1250 // If OLDDECL and NEWDECL are concept declarations with the same type
1251 // (i.e., and template parameters), but different requirements,
1252 // emit diagnostics and return true. Otherwise, return false.
1254 check_concept_refinement (tree olddecl
, tree newdecl
)
1256 if (!DECL_DECLARED_CONCEPT_P (olddecl
) || !DECL_DECLARED_CONCEPT_P (newdecl
))
1259 tree d1
= DECL_TEMPLATE_RESULT (olddecl
);
1260 tree d2
= DECL_TEMPLATE_RESULT (newdecl
);
1261 if (TREE_CODE (d1
) != TREE_CODE (d2
))
1264 tree t1
= TREE_TYPE (d1
);
1265 tree t2
= TREE_TYPE (d2
);
1266 if (TREE_CODE (d1
) == FUNCTION_DECL
)
1268 if (compparms (TYPE_ARG_TYPES (t1
), TYPE_ARG_TYPES (t2
))
1269 && comp_template_parms (DECL_TEMPLATE_PARMS (olddecl
),
1270 DECL_TEMPLATE_PARMS (newdecl
))
1271 && !equivalently_constrained (olddecl
, newdecl
))
1273 error ("cannot specialize concept %q#D", olddecl
);
1280 /* DECL is a redeclaration of a function or function template. If
1281 it does have default arguments issue a diagnostic. Note: this
1282 function is used to enforce the requirements in C++11 8.3.6 about
1283 no default arguments in redeclarations. */
1286 check_redeclaration_no_default_args (tree decl
)
1288 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1290 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1291 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1292 if (TREE_PURPOSE (t
))
1294 permerror (DECL_SOURCE_LOCATION (decl
),
1295 "redeclaration of %q#D may not have default "
1301 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1302 && lookup_attribute ("gnu_inline", \
1303 DECL_ATTRIBUTES (fn)))
1305 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1306 If the redeclaration is invalid, a diagnostic is issued, and the
1307 error_mark_node is returned. Otherwise, OLDDECL is returned.
1309 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1312 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1315 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1317 unsigned olddecl_uid
= DECL_UID (olddecl
);
1318 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1319 int new_defines_function
= 0;
1320 tree new_template_info
;
1322 if (newdecl
== olddecl
)
1325 types_match
= decls_match (newdecl
, olddecl
);
1327 /* If either the type of the new decl or the type of the old decl is an
1328 error_mark_node, then that implies that we have already issued an
1329 error (earlier) for some bogus type specification, and in that case,
1330 it is rather pointless to harass the user with yet more error message
1331 about the same declaration, so just pretend the types match here. */
1332 if (TREE_TYPE (newdecl
) == error_mark_node
1333 || TREE_TYPE (olddecl
) == error_mark_node
)
1334 return error_mark_node
;
1336 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1337 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1339 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1340 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1341 && check_raw_literal_operator (olddecl
))
1342 error ("literal operator template %q+D conflicts with"
1343 " raw literal operator %qD", newdecl
, olddecl
);
1344 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1345 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1346 && check_raw_literal_operator (newdecl
))
1347 error ("raw literal operator %q+D conflicts with"
1348 " literal operator template %qD", newdecl
, olddecl
);
1351 if (DECL_P (olddecl
)
1352 && TREE_CODE (newdecl
) == FUNCTION_DECL
1353 && TREE_CODE (olddecl
) == FUNCTION_DECL
1354 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1356 if (DECL_DECLARED_INLINE_P (newdecl
)
1357 && DECL_UNINLINABLE (newdecl
)
1358 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1359 /* Already warned elsewhere. */;
1360 else if (DECL_DECLARED_INLINE_P (olddecl
)
1361 && DECL_UNINLINABLE (olddecl
)
1362 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1363 /* Already warned. */;
1364 else if (DECL_DECLARED_INLINE_P (newdecl
)
1365 && DECL_UNINLINABLE (olddecl
)
1366 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1368 if (warning_at (DECL_SOURCE_LOCATION (newdecl
),
1369 OPT_Wattributes
, "function %qD redeclared as inline",
1371 inform (DECL_SOURCE_LOCATION (olddecl
),
1372 "previous declaration of %qD with attribute noinline",
1375 else if (DECL_DECLARED_INLINE_P (olddecl
)
1376 && DECL_UNINLINABLE (newdecl
)
1377 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1379 if (warning_at (DECL_SOURCE_LOCATION (newdecl
),
1380 OPT_Wattributes
, "function %qD redeclared with "
1381 "attribute noinline", newdecl
))
1382 inform (DECL_SOURCE_LOCATION (olddecl
),
1383 "previous declaration of %qD was inline",
1388 /* Check for redeclaration and other discrepancies. */
1389 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1390 && DECL_ARTIFICIAL (olddecl
))
1392 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1393 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1395 /* Avoid warnings redeclaring built-ins which have not been
1396 explicitly declared. */
1397 if (DECL_ANTICIPATED (olddecl
))
1400 /* If you declare a built-in or predefined function name as static,
1401 the old definition is overridden, but optionally warn this was a
1402 bad choice of name. */
1403 if (! TREE_PUBLIC (newdecl
))
1405 warning (OPT_Wshadow
,
1406 DECL_BUILT_IN (olddecl
)
1407 ? G_("shadowing built-in function %q#D")
1408 : G_("shadowing library function %q#D"), olddecl
);
1409 /* Discard the old built-in function. */
1412 /* If the built-in is not ansi, then programs can override
1413 it even globally without an error. */
1414 else if (! DECL_BUILT_IN (olddecl
))
1415 warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1416 "library function %q#D redeclared as non-function %q#D",
1419 error ("declaration of %q+#D conflicts with built-in "
1420 "declaration %q#D", newdecl
, olddecl
);
1423 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1425 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1426 error_at (DECL_SOURCE_LOCATION (newdecl
),
1427 "redeclaration of %<pragma omp declare reduction%>");
1428 inform (DECL_SOURCE_LOCATION (olddecl
),
1429 "previous %<pragma omp declare reduction%> declaration");
1430 return error_mark_node
;
1432 else if (!types_match
)
1434 /* Avoid warnings redeclaring built-ins which have not been
1435 explicitly declared. */
1436 if (DECL_ANTICIPATED (olddecl
))
1438 /* Deal with fileptr_type_node. FILE type is not known
1439 at the time we create the builtins. */
1442 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1443 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1445 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1448 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1450 tree t
= TREE_VALUE (t1
);
1453 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1454 == get_identifier ("FILE")
1455 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1457 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1459 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1460 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1461 types_match
= decls_match (newdecl
, olddecl
);
1463 return duplicate_decls (newdecl
, olddecl
,
1465 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1468 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1471 else if ((DECL_EXTERN_C_P (newdecl
)
1472 && DECL_EXTERN_C_P (olddecl
))
1473 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1474 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1476 /* A near match; override the builtin. */
1478 if (TREE_PUBLIC (newdecl
))
1479 warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1480 "new declaration %q#D ambiguates built-in "
1481 "declaration %q#D", newdecl
, olddecl
);
1483 warning (OPT_Wshadow
,
1484 DECL_BUILT_IN (olddecl
)
1485 ? G_("shadowing built-in function %q#D")
1486 : G_("shadowing library function %q#D"), olddecl
);
1489 /* Discard the old built-in function. */
1492 /* Replace the old RTL to avoid problems with inlining. */
1493 COPY_DECL_RTL (newdecl
, olddecl
);
1495 /* Even if the types match, prefer the new declarations type for
1496 built-ins which have not been explicitly declared, for
1497 exception lists, etc... */
1498 else if (DECL_IS_BUILTIN (olddecl
))
1500 tree type
= TREE_TYPE (newdecl
);
1501 tree attribs
= (*targetm
.merge_type_attributes
)
1502 (TREE_TYPE (olddecl
), type
);
1504 type
= cp_build_type_attribute_variant (type
, attribs
);
1505 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1508 /* If a function is explicitly declared "throw ()", propagate that to
1509 the corresponding builtin. */
1510 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1511 && DECL_ANTICIPATED (olddecl
)
1512 && TREE_NOTHROW (newdecl
)
1513 && !TREE_NOTHROW (olddecl
))
1515 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1516 tree tmpdecl
= builtin_decl_explicit (fncode
);
1517 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1518 TREE_NOTHROW (tmpdecl
) = 1;
1521 /* Whether or not the builtin can throw exceptions has no
1522 bearing on this declarator. */
1523 TREE_NOTHROW (olddecl
) = 0;
1525 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1527 /* If a builtin function is redeclared as `static', merge
1528 the declarations, but make the original one static. */
1529 DECL_THIS_STATIC (olddecl
) = 1;
1530 TREE_PUBLIC (olddecl
) = 0;
1532 /* Make the old declaration consistent with the new one so
1533 that all remnants of the builtin-ness of this function
1534 will be banished. */
1535 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1536 COPY_DECL_RTL (newdecl
, olddecl
);
1539 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1541 /* C++ Standard, 3.3, clause 4:
1542 "[Note: a namespace name or a class template name must be unique
1543 in its declarative region (7.3.2, clause 14). ]" */
1544 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1545 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1546 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1547 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1548 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1549 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1551 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1552 && TREE_CODE (newdecl
) != TYPE_DECL
)
1553 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1554 && TREE_CODE (olddecl
) != TYPE_DECL
))
1556 /* We do nothing special here, because C++ does such nasty
1557 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1558 get shadowed, and know that if we need to find a TYPE_DECL
1559 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1560 slot of the identifier. */
1564 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1565 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1566 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1567 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1571 error ("%q#D redeclared as different kind of symbol", newdecl
);
1572 if (TREE_CODE (olddecl
) == TREE_LIST
)
1573 olddecl
= TREE_VALUE (olddecl
);
1574 inform (DECL_SOURCE_LOCATION (olddecl
),
1575 "previous declaration %q#D", olddecl
);
1577 return error_mark_node
;
1579 else if (!types_match
)
1581 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1582 /* These are certainly not duplicate declarations; they're
1583 from different scopes. */
1586 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1588 /* The name of a class template may not be declared to refer to
1589 any other template, class, function, object, namespace, value,
1590 or type in the same scope. */
1591 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1592 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1594 error ("conflicting declaration of template %q+#D", newdecl
);
1595 inform (DECL_SOURCE_LOCATION (olddecl
),
1596 "previous declaration %q#D", olddecl
);
1597 return error_mark_node
;
1599 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1600 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1601 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1602 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1603 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1604 DECL_TEMPLATE_PARMS (olddecl
))
1605 /* Template functions can be disambiguated by
1607 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1608 TREE_TYPE (TREE_TYPE (olddecl
)))
1609 // Template functions can also be disambiguated by
1611 && equivalently_constrained (olddecl
, newdecl
))
1613 error ("ambiguating new declaration %q+#D", newdecl
);
1614 inform (DECL_SOURCE_LOCATION (olddecl
),
1615 "old declaration %q#D", olddecl
);
1617 else if (check_concept_refinement (olddecl
, newdecl
))
1618 return error_mark_node
;
1621 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1623 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1625 error ("conflicting declaration of C function %q+#D",
1627 inform (DECL_SOURCE_LOCATION (olddecl
),
1628 "previous declaration %q#D", olddecl
);
1631 /* For function versions, params and types match, but they
1632 are not ambiguous. */
1633 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1634 && !DECL_FUNCTION_VERSIONED (olddecl
))
1635 // The functions have the same parameter types.
1636 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1637 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)))
1638 // And the same constraints.
1639 && equivalently_constrained (newdecl
, olddecl
))
1641 error ("ambiguating new declaration of %q+#D", newdecl
);
1642 inform (DECL_SOURCE_LOCATION (olddecl
),
1643 "old declaration %q#D", olddecl
);
1644 return error_mark_node
;
1651 error ("conflicting declaration %q+#D", newdecl
);
1652 inform (DECL_SOURCE_LOCATION (olddecl
),
1653 "previous declaration as %q#D", olddecl
);
1654 return error_mark_node
;
1657 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1658 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1659 && (!DECL_TEMPLATE_INFO (newdecl
)
1660 || (DECL_TI_TEMPLATE (newdecl
)
1661 != DECL_TI_TEMPLATE (olddecl
))))
1662 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1663 && (!DECL_TEMPLATE_INFO (olddecl
)
1664 || (DECL_TI_TEMPLATE (olddecl
)
1665 != DECL_TI_TEMPLATE (newdecl
))))))
1666 /* It's OK to have a template specialization and a non-template
1667 with the same type, or to have specializations of two
1668 different templates with the same type. Note that if one is a
1669 specialization, and the other is an instantiation of the same
1670 template, that we do not exit at this point. That situation
1671 can occur if we instantiate a template class, and then
1672 specialize one of its methods. This situation is valid, but
1673 the declarations must be merged in the usual way. */
1675 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1676 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1677 && !DECL_USE_TEMPLATE (newdecl
))
1678 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1679 && !DECL_USE_TEMPLATE (olddecl
))))
1680 /* One of the declarations is a template instantiation, and the
1681 other is not a template at all. That's OK. */
1683 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1685 /* In [namespace.alias] we have:
1687 In a declarative region, a namespace-alias-definition can be
1688 used to redefine a namespace-alias declared in that declarative
1689 region to refer only to the namespace to which it already
1692 Therefore, if we encounter a second alias directive for the same
1693 alias, we can just ignore the second directive. */
1694 if (DECL_NAMESPACE_ALIAS (newdecl
)
1695 && (DECL_NAMESPACE_ALIAS (newdecl
)
1696 == DECL_NAMESPACE_ALIAS (olddecl
)))
1698 /* [namespace.alias]
1700 A namespace-name or namespace-alias shall not be declared as
1701 the name of any other entity in the same declarative region.
1702 A namespace-name defined at global scope shall not be
1703 declared as the name of any other entity in any global scope
1705 error ("conflicting declaration of namespace %q+D", newdecl
);
1706 inform (DECL_SOURCE_LOCATION (olddecl
),
1707 "previous declaration of namespace %qD here", olddecl
);
1708 return error_mark_node
;
1712 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1715 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1716 if (DECL_NAME (olddecl
) != NULL_TREE
)
1717 inform (DECL_SOURCE_LOCATION (olddecl
),
1718 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1719 ? G_("%q#D previously defined here")
1720 : G_("%q#D previously declared here"), olddecl
);
1721 return error_mark_node
;
1723 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1724 && DECL_INITIAL (olddecl
) != NULL_TREE
1725 && !prototype_p (TREE_TYPE (olddecl
))
1726 && prototype_p (TREE_TYPE (newdecl
)))
1728 /* Prototype decl follows defn w/o prototype. */
1729 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1730 "prototype specified for %q#D", newdecl
))
1731 inform (DECL_SOURCE_LOCATION (olddecl
),
1732 "previous non-prototype definition here");
1734 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1735 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1738 If two declarations of the same function or object
1739 specify different linkage-specifications ..., the program
1740 is ill-formed.... Except for functions with C++ linkage,
1741 a function declaration without a linkage specification
1742 shall not precede the first linkage specification for
1743 that function. A function can be declared without a
1744 linkage specification after an explicit linkage
1745 specification has been seen; the linkage explicitly
1746 specified in the earlier declaration is not affected by
1747 such a function declaration.
1749 DR 563 raises the question why the restrictions on
1750 functions should not also apply to objects. Older
1751 versions of G++ silently ignore the linkage-specification
1759 which is clearly wrong. Therefore, we now treat objects
1761 if (current_lang_depth () == 0)
1763 /* There is no explicit linkage-specification, so we use
1764 the linkage from the previous declaration. */
1765 if (!DECL_LANG_SPECIFIC (newdecl
))
1766 retrofit_lang_decl (newdecl
);
1767 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1771 error ("conflicting declaration of %q+#D with %qL linkage",
1772 newdecl
, DECL_LANGUAGE (newdecl
));
1773 inform (DECL_SOURCE_LOCATION (olddecl
),
1774 "previous declaration with %qL linkage",
1775 DECL_LANGUAGE (olddecl
));
1779 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1781 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1783 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1784 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1785 && (/* grokfndecl passes member function templates too
1786 as FUNCTION_DECLs. */
1787 DECL_TEMPLATE_INFO (olddecl
)
1789 Default arguments for a member function of a class
1790 template shall be specified on the initial declaration
1791 of the member function within the class template. */
1792 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1793 check_redeclaration_no_default_args (newdecl
);
1796 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1797 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1800 for (; t1
&& t1
!= void_list_node
;
1801 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1802 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1804 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1807 if (permerror (input_location
,
1808 "default argument given for parameter "
1809 "%d of %q#D", i
, newdecl
))
1810 inform (DECL_SOURCE_LOCATION (olddecl
),
1811 "previous specification in %q#D here",
1816 error ("default argument given for parameter %d "
1817 "of %q#D", i
, newdecl
);
1818 inform (DECL_SOURCE_LOCATION (olddecl
),
1819 "previous specification in %q#D here",
1827 /* Do not merge an implicit typedef with an explicit one. In:
1831 typedef class A A __attribute__ ((foo));
1833 the attribute should apply only to the typedef. */
1834 if (TREE_CODE (olddecl
) == TYPE_DECL
1835 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1836 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1839 /* If new decl is `static' and an `extern' was seen previously,
1841 warn_extern_redeclared_static (newdecl
, olddecl
);
1843 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1844 return error_mark_node
;
1846 /* We have committed to returning 1 at this point. */
1847 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1849 /* Now that functions must hold information normally held
1850 by field decls, there is extra work to do so that
1851 declaration information does not get destroyed during
1853 if (DECL_VINDEX (olddecl
))
1854 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1855 if (DECL_CONTEXT (olddecl
))
1856 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1857 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1858 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1859 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1860 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1861 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1862 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1863 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1864 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1865 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1866 SET_OVERLOADED_OPERATOR_CODE
1867 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1868 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1870 /* Optionally warn about more than one declaration for the same
1871 name, but don't warn about a function declaration followed by a
1873 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1874 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1875 /* Don't warn about extern decl followed by definition. */
1876 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1877 /* Don't warn about friends, let add_friend take care of it. */
1878 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1879 /* Don't warn about declaration followed by specialization. */
1880 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1881 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1883 if (warning_at (DECL_SOURCE_LOCATION (newdecl
),
1884 OPT_Wredundant_decls
,
1885 "redundant redeclaration of %qD in same scope",
1887 inform (DECL_SOURCE_LOCATION (olddecl
),
1888 "previous declaration of %qD", olddecl
);
1891 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1892 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1894 if (DECL_DELETED_FN (newdecl
))
1896 error ("deleted definition of %q+D", newdecl
);
1897 inform (DECL_SOURCE_LOCATION (olddecl
),
1898 "previous declaration of %qD", olddecl
);
1900 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1904 /* Deal with C++: must preserve virtual function table size. */
1905 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1907 tree newtype
= TREE_TYPE (newdecl
);
1908 tree oldtype
= TREE_TYPE (olddecl
);
1910 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1911 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1912 CLASSTYPE_FRIEND_CLASSES (newtype
)
1913 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1915 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1918 /* Copy all the DECL_... slots specified in the new decl
1919 except for any that we copy here from the old type. */
1920 DECL_ATTRIBUTES (newdecl
)
1921 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1923 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1925 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1926 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1927 && DECL_HIDDEN_FRIEND_P (olddecl
)
1928 && newdecl_is_friend
);
1931 DECL_ANTICIPATED (olddecl
) = 0;
1932 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1936 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1940 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1941 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1942 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1943 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1944 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1945 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1947 DECL_ATTRIBUTES (old_result
)
1948 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1950 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1952 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1953 declarations of a function template. */
1954 if (DECL_SOURCE_LOCATION (newdecl
)
1955 != DECL_SOURCE_LOCATION (olddecl
))
1956 check_redeclaration_no_default_args (newdecl
);
1958 check_default_args (newdecl
);
1960 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1961 && DECL_INITIAL (new_result
))
1963 if (DECL_INITIAL (old_result
))
1964 DECL_UNINLINABLE (old_result
) = 1;
1966 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1967 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1968 DECL_NOT_REALLY_EXTERN (old_result
)
1969 = DECL_NOT_REALLY_EXTERN (new_result
);
1970 DECL_INTERFACE_KNOWN (old_result
)
1971 = DECL_INTERFACE_KNOWN (new_result
);
1972 DECL_DECLARED_INLINE_P (old_result
)
1973 = DECL_DECLARED_INLINE_P (new_result
);
1974 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1975 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1980 DECL_DECLARED_INLINE_P (old_result
)
1981 |= DECL_DECLARED_INLINE_P (new_result
);
1982 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1983 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1984 check_redeclaration_exception_specification (newdecl
, olddecl
);
1988 /* If the new declaration is a definition, update the file and
1989 line information on the declaration, and also make
1990 the old declaration the same definition. */
1991 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1993 DECL_SOURCE_LOCATION (olddecl
)
1994 = DECL_SOURCE_LOCATION (old_result
)
1995 = DECL_SOURCE_LOCATION (newdecl
);
1996 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1997 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
2000 DECL_ARGUMENTS (old_result
)
2001 = DECL_ARGUMENTS (new_result
);
2002 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
2003 parm
= DECL_CHAIN (parm
))
2004 DECL_CONTEXT (parm
) = old_result
;
2013 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2014 check_redeclaration_exception_specification (newdecl
, olddecl
);
2016 /* Automatically handles default parameters. */
2017 tree oldtype
= TREE_TYPE (olddecl
);
2020 /* For typedefs use the old type, as the new type's DECL_NAME points
2021 at newdecl, which will be ggc_freed. */
2022 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2025 /* Merge the data types specified in the two decls. */
2026 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
2028 if (VAR_P (newdecl
))
2030 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
2031 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
2032 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
2033 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
2034 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
2035 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
2037 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2038 if (DECL_LANG_SPECIFIC (olddecl
)
2039 && CP_DECL_THREADPRIVATE_P (olddecl
))
2041 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2042 if (!DECL_LANG_SPECIFIC (newdecl
))
2043 retrofit_lang_decl (newdecl
);
2045 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2049 /* An explicit specialization of a function template or of a member
2050 function of a class template can be declared transaction_safe
2051 independently of whether the corresponding template entity is declared
2052 transaction_safe. */
2053 if (flag_tm
&& TREE_CODE (newdecl
) == FUNCTION_DECL
2054 && DECL_TEMPLATE_INSTANTIATION (olddecl
)
2055 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)
2056 && tx_safe_fn_type_p (newtype
)
2057 && !tx_safe_fn_type_p (TREE_TYPE (newdecl
)))
2058 newtype
= tx_unsafe_fn_variant (newtype
);
2060 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2062 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2063 check_default_args (newdecl
);
2065 /* Lay the type out, unless already done. */
2066 if (! same_type_p (newtype
, oldtype
)
2067 && TREE_TYPE (newdecl
) != error_mark_node
2068 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2069 layout_type (TREE_TYPE (newdecl
));
2071 if ((VAR_P (newdecl
)
2072 || TREE_CODE (newdecl
) == PARM_DECL
2073 || TREE_CODE (newdecl
) == RESULT_DECL
2074 || TREE_CODE (newdecl
) == FIELD_DECL
2075 || TREE_CODE (newdecl
) == TYPE_DECL
)
2076 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2077 layout_decl (newdecl
, 0);
2079 /* Merge the type qualifiers. */
2080 if (TREE_READONLY (newdecl
))
2081 TREE_READONLY (olddecl
) = 1;
2082 if (TREE_THIS_VOLATILE (newdecl
))
2083 TREE_THIS_VOLATILE (olddecl
) = 1;
2084 if (TREE_NOTHROW (newdecl
))
2085 TREE_NOTHROW (olddecl
) = 1;
2087 /* Merge deprecatedness. */
2088 if (TREE_DEPRECATED (newdecl
))
2089 TREE_DEPRECATED (olddecl
) = 1;
2091 /* Preserve function specific target and optimization options */
2092 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2094 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2095 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2096 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2097 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2099 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2100 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2101 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2102 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2105 /* Merge the initialization information. */
2106 if (DECL_INITIAL (newdecl
) == NULL_TREE
2107 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2109 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2110 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2111 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2113 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2114 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2118 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2120 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2121 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2122 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2123 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2124 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2125 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2126 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2127 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2128 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2129 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2130 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2131 /* Keep the old RTL. */
2132 COPY_DECL_RTL (olddecl
, newdecl
);
2134 else if (VAR_P (newdecl
)
2135 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2137 /* Keep the old RTL. We cannot keep the old RTL if the old
2138 declaration was for an incomplete object and the new
2139 declaration is not since many attributes of the RTL will
2141 COPY_DECL_RTL (olddecl
, newdecl
);
2144 /* If cannot merge, then use the new type and qualifiers,
2145 and don't preserve the old rtl. */
2148 /* Clean out any memory we had of the old declaration. */
2149 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2151 TREE_VALUE (oldstatic
) = error_mark_node
;
2153 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2154 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2155 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2156 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2159 /* Merge the storage class information. */
2160 merge_weak (newdecl
, olddecl
);
2162 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2163 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2164 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2165 if (! DECL_EXTERNAL (olddecl
))
2166 DECL_EXTERNAL (newdecl
) = 0;
2167 if (! DECL_COMDAT (olddecl
))
2168 DECL_COMDAT (newdecl
) = 0;
2170 new_template_info
= NULL_TREE
;
2171 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2173 bool new_redefines_gnu_inline
= false;
2175 if (new_defines_function
2176 && ((DECL_INTERFACE_KNOWN (olddecl
)
2177 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2178 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2179 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2180 == FUNCTION_DECL
))))
2184 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2185 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2187 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2190 if (!new_redefines_gnu_inline
)
2192 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2193 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2194 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2196 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2197 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2198 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2200 /* If the OLDDECL is an instantiation and/or specialization,
2201 then the NEWDECL must be too. But, it may not yet be marked
2202 as such if the caller has created NEWDECL, but has not yet
2203 figured out that it is a redeclaration. */
2204 if (!DECL_USE_TEMPLATE (newdecl
))
2205 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2207 /* Don't really know how much of the language-specific
2208 values we should copy from old to new. */
2209 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2210 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2211 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2212 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2214 if (LANG_DECL_HAS_MIN (newdecl
))
2216 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2217 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2218 if (DECL_TEMPLATE_INFO (newdecl
))
2220 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2221 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2222 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2223 /* Remember the presence of explicit specialization args. */
2224 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2225 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2227 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2229 /* Only functions have these fields. */
2230 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2232 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2233 DECL_BEFRIENDING_CLASSES (newdecl
)
2234 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2235 DECL_BEFRIENDING_CLASSES (olddecl
));
2236 /* DECL_THUNKS is only valid for virtual functions,
2237 otherwise it is a DECL_FRIEND_CONTEXT. */
2238 if (DECL_VIRTUAL_P (newdecl
))
2239 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2241 /* Only variables have this field. */
2242 else if (VAR_P (newdecl
)
2243 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2244 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2247 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2251 /* Merge parameter attributes. */
2252 tree oldarg
, newarg
;
2253 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2254 newarg
= DECL_ARGUMENTS(newdecl
);
2256 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2257 DECL_ATTRIBUTES (newarg
)
2258 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2259 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2262 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2263 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2265 /* If newdecl is not a specialization, then it is not a
2266 template-related function at all. And that means that we
2267 should have exited above, returning 0. */
2268 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2270 if (DECL_ODR_USED (olddecl
))
2271 /* From [temp.expl.spec]:
2273 If a template, a member template or the member of a class
2274 template is explicitly specialized then that
2275 specialization shall be declared before the first use of
2276 that specialization that would cause an implicit
2277 instantiation to take place, in every translation unit in
2278 which such a use occurs. */
2279 error ("explicit specialization of %qD after first use",
2282 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2283 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2284 && DECL_DECLARED_INLINE_P (newdecl
));
2286 /* Don't propagate visibility from the template to the
2287 specialization here. We'll do that in determine_visibility if
2289 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2291 /* [temp.expl.spec/14] We don't inline explicit specialization
2292 just because the primary template says so. */
2294 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2295 the always_inline attribute. */
2296 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2297 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2299 if (DECL_DECLARED_INLINE_P (newdecl
))
2300 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2302 DECL_ATTRIBUTES (newdecl
)
2303 = remove_attribute ("always_inline",
2304 DECL_ATTRIBUTES (newdecl
));
2307 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2309 /* Never inline re-defined extern inline functions.
2310 FIXME: this could be better handled by keeping both
2311 function as separate declarations. */
2312 DECL_UNINLINABLE (newdecl
) = 1;
2316 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2317 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2319 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2321 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2322 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2324 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2325 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2326 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2327 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2330 /* Preserve abstractness on cloned [cd]tors. */
2331 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2333 /* Update newdecl's parms to point at olddecl. */
2334 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2335 parm
= DECL_CHAIN (parm
))
2336 DECL_CONTEXT (parm
) = olddecl
;
2340 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2341 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2342 COPY_DECL_RTL (newdecl
, olddecl
);
2344 if (! types_match
|| new_defines_function
)
2346 /* These need to be copied so that the names are available.
2347 Note that if the types do match, we'll preserve inline
2348 info and other bits, but if not, we won't. */
2349 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2350 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2352 /* If redeclaring a builtin function, it stays built in
2353 if newdecl is a gnu_inline definition, or if newdecl is just
2355 if (DECL_BUILT_IN (olddecl
)
2356 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2358 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2359 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2360 /* If we're keeping the built-in definition, keep the rtl,
2361 regardless of declaration matches. */
2362 COPY_DECL_RTL (olddecl
, newdecl
);
2363 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2365 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2368 /* If a compatible prototype of these builtin functions
2369 is seen, assume the runtime implements it with the
2370 expected semantics. */
2371 case BUILT_IN_STPCPY
:
2372 if (builtin_decl_explicit_p (fncode
))
2373 set_builtin_decl_implicit_p (fncode
, true);
2376 if (builtin_decl_explicit_p (fncode
))
2377 set_builtin_decl_declared_p (fncode
, true);
2382 if (new_defines_function
)
2383 /* If defining a function declared with other language
2384 linkage, use the previously declared language linkage. */
2385 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2386 else if (types_match
)
2388 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2389 /* Don't clear out the arguments if we're just redeclaring a
2391 if (DECL_ARGUMENTS (olddecl
))
2392 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2395 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2396 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2398 /* Now preserve various other info from the definition. */
2399 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2400 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2401 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2402 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2404 /* Warn about conflicting visibility specifications. */
2405 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2406 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2407 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2409 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2410 "%qD: visibility attribute ignored because it "
2411 "conflicts with previous declaration", newdecl
))
2412 inform (DECL_SOURCE_LOCATION (olddecl
),
2413 "previous declaration of %qD", olddecl
);
2415 /* Choose the declaration which specified visibility. */
2416 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2418 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2419 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2421 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2422 so keep this behavior. */
2423 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2425 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2426 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2428 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2429 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2431 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2432 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2434 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2435 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2436 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2438 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2439 with that from NEWDECL below. */
2440 if (DECL_LANG_SPECIFIC (olddecl
))
2442 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2443 != DECL_LANG_SPECIFIC (newdecl
));
2444 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2447 /* Merge the USED information. */
2448 if (TREE_USED (olddecl
))
2449 TREE_USED (newdecl
) = 1;
2450 else if (TREE_USED (newdecl
))
2451 TREE_USED (olddecl
) = 1;
2452 if (VAR_P (newdecl
))
2454 if (DECL_READ_P (olddecl
))
2455 DECL_READ_P (newdecl
) = 1;
2456 else if (DECL_READ_P (newdecl
))
2457 DECL_READ_P (olddecl
) = 1;
2459 if (DECL_PRESERVE_P (olddecl
))
2460 DECL_PRESERVE_P (newdecl
) = 1;
2461 else if (DECL_PRESERVE_P (newdecl
))
2462 DECL_PRESERVE_P (olddecl
) = 1;
2464 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2465 to olddecl and deleted. */
2466 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2467 && DECL_FUNCTION_VERSIONED (olddecl
))
2469 /* Set the flag for newdecl so that it gets copied to olddecl. */
2470 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2471 /* newdecl will be purged after copying to olddecl and is no longer
2473 cgraph_node::delete_function_version (newdecl
);
2476 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2479 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2481 function_size
= sizeof (struct tree_decl_common
);
2483 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2484 (char *) newdecl
+ sizeof (struct tree_common
),
2485 function_size
- sizeof (struct tree_common
));
2487 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2488 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2489 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2491 /* Preserve symtab node mapping. */
2492 olddecl
->decl_with_vis
.symtab_node
= snode
;
2494 if (new_template_info
)
2495 /* If newdecl is a template instantiation, it is possible that
2496 the following sequence of events has occurred:
2498 o A friend function was declared in a class template. The
2499 class template was instantiated.
2501 o The instantiation of the friend declaration was
2502 recorded on the instantiation list, and is newdecl.
2504 o Later, however, instantiate_class_template called pushdecl
2505 on the newdecl to perform name injection. But, pushdecl in
2506 turn called duplicate_decls when it discovered that another
2507 declaration of a global function with the same name already
2510 o Here, in duplicate_decls, we decided to clobber newdecl.
2512 If we're going to do that, we'd better make sure that
2513 olddecl, and not newdecl, is on the list of
2514 instantiations so that if we try to do the instantiation
2515 again we won't get the clobbered declaration. */
2516 reregister_specialization (newdecl
,
2522 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2524 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2525 (char *) newdecl
+ sizeof (struct tree_common
),
2526 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2527 switch (TREE_CODE (newdecl
))
2537 struct symtab_node
*snode
= NULL
;
2540 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
)
2541 || DECL_EXTERNAL (olddecl
)))
2542 snode
= symtab_node::get (olddecl
);
2543 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2544 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2545 size
- sizeof (struct tree_decl_common
)
2546 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2547 if (VAR_P (newdecl
))
2548 olddecl
->decl_with_vis
.symtab_node
= snode
;
2552 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2553 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2554 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2555 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2560 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2562 if (DECL_EXTERNAL (olddecl
)
2563 || TREE_PUBLIC (olddecl
)
2564 || TREE_STATIC (olddecl
))
2566 /* Merge the section attribute.
2567 We want to issue an error if the sections conflict but that must be
2568 done later in decl_attributes since we are called before attributes
2570 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2571 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2573 if (DECL_ONE_ONLY (newdecl
))
2575 struct symtab_node
*oldsym
, *newsym
;
2576 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2577 oldsym
= cgraph_node::get_create (olddecl
);
2579 oldsym
= varpool_node::get_create (olddecl
);
2580 newsym
= symtab_node::get (newdecl
);
2581 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2586 && CP_DECL_THREAD_LOCAL_P (newdecl
))
2588 CP_DECL_THREAD_LOCAL_P (olddecl
) = true;
2589 if (!processing_template_decl
)
2590 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2594 DECL_UID (olddecl
) = olddecl_uid
;
2596 DECL_FRIEND_P (olddecl
) = 1;
2599 DECL_ANTICIPATED (olddecl
) = 1;
2600 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2603 /* NEWDECL contains the merged attribute lists.
2604 Update OLDDECL to be the same. */
2605 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2607 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2608 so that encode_section_info has a chance to look at the new decl
2609 flags and attributes. */
2610 if (DECL_RTL_SET_P (olddecl
)
2611 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2613 && TREE_STATIC (olddecl
))))
2614 make_decl_rtl (olddecl
);
2616 /* The NEWDECL will no longer be needed. Because every out-of-class
2617 declaration of a member results in a call to duplicate_decls,
2618 freeing these nodes represents in a significant savings.
2620 Before releasing the node, be sore to remove function from symbol
2621 table that might have been inserted there to record comdat group.
2622 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2623 structure is shared in between newdecl and oldecl. */
2624 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2625 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2626 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2628 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2633 /* Remove the associated constraints for newdecl, if any, before
2634 reclaiming memory. */
2636 remove_constraints (newdecl
);
2643 /* Return zero if the declaration NEWDECL is valid
2644 when the declaration OLDDECL (assumed to be for the same name)
2645 has already been seen.
2646 Otherwise return an error message format string with a %s
2647 where the identifier should go. */
2650 redeclaration_error_message (tree newdecl
, tree olddecl
)
2652 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2654 /* Because C++ can put things into name space for free,
2655 constructs like "typedef struct foo { ... } foo"
2656 would look like an erroneous redeclaration. */
2657 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2660 return G_("redefinition of %q#D");
2662 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2664 /* If this is a pure function, its olddecl will actually be
2665 the original initialization to `0' (which we force to call
2666 abort()). Don't complain about redefinition in this case. */
2667 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2668 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2671 /* If both functions come from different namespaces, this is not
2672 a redeclaration - this is a conflict with a used function. */
2673 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2674 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2675 && ! decls_match (olddecl
, newdecl
))
2676 return G_("%qD conflicts with used function");
2678 /* We'll complain about linkage mismatches in
2679 warn_extern_redeclared_static. */
2681 /* Defining the same name twice is no good. */
2682 if (DECL_INITIAL (olddecl
) != NULL_TREE
2683 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2685 if (DECL_NAME (olddecl
) == NULL_TREE
)
2686 return G_("%q#D not declared in class");
2687 else if (!GNU_INLINE_P (olddecl
)
2688 || GNU_INLINE_P (newdecl
))
2689 return G_("redefinition of %q#D");
2692 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2694 bool olda
= GNU_INLINE_P (olddecl
);
2695 bool newa
= GNU_INLINE_P (newdecl
);
2700 return G_("%q+D redeclared inline with "
2701 "%<gnu_inline%> attribute");
2703 return G_("%q+D redeclared inline without "
2704 "%<gnu_inline%> attribute");
2708 check_abi_tag_redeclaration
2709 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2710 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2714 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2718 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2720 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2721 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2722 return G_("redefinition of %q#D");
2726 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2727 || (DECL_TEMPLATE_RESULT (newdecl
)
2728 == DECL_TEMPLATE_RESULT (olddecl
)))
2731 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2732 if (DECL_TEMPLATE_INFO (nt
))
2733 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2734 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2735 if (DECL_TEMPLATE_INFO (ot
))
2736 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2737 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2738 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2739 return G_("redefinition of %q#D");
2741 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2743 bool olda
= GNU_INLINE_P (ot
);
2744 bool newa
= GNU_INLINE_P (nt
);
2749 return G_("%q+D redeclared inline with "
2750 "%<gnu_inline%> attribute");
2752 return G_("%q+D redeclared inline without "
2753 "%<gnu_inline%> attribute");
2757 /* Core issue #226 (C++0x):
2759 If a friend function template declaration specifies a
2760 default template-argument, that declaration shall be a
2761 definition and shall be the only declaration of the
2762 function template in the translation unit. */
2763 if ((cxx_dialect
!= cxx98
)
2764 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2765 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2766 /*is_primary=*/true,
2767 /*is_partial=*/false,
2768 /*is_friend_decl=*/2))
2769 return G_("redeclaration of friend %q#D "
2770 "may not have default template arguments");
2774 else if (VAR_P (newdecl
)
2775 && CP_DECL_THREAD_LOCAL_P (newdecl
) != CP_DECL_THREAD_LOCAL_P (olddecl
)
2776 && (! DECL_LANG_SPECIFIC (olddecl
)
2777 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2778 || CP_DECL_THREAD_LOCAL_P (newdecl
)))
2780 /* Only variables can be thread-local, and all declarations must
2781 agree on this property. */
2782 if (CP_DECL_THREAD_LOCAL_P (newdecl
))
2783 return G_("thread-local declaration of %q#D follows "
2784 "non-thread-local declaration");
2786 return G_("non-thread-local declaration of %q#D follows "
2787 "thread-local declaration");
2789 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2791 /* The objects have been declared at namespace scope. If either
2792 is a member of an anonymous union, then this is an invalid
2793 redeclaration. For example:
2799 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2800 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2801 return G_("redeclaration of %q#D");
2802 /* If at least one declaration is a reference, there is no
2803 conflict. For example:
2809 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2811 /* Reject two definitions. */
2812 return G_("redefinition of %q#D");
2816 /* Objects declared with block scope: */
2817 /* Reject two definitions, and reject a definition
2818 together with an external reference. */
2819 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2820 return G_("redeclaration of %q#D");
2825 /* Hash and equality functions for the named_label table. */
2828 named_label_hasher::hash (named_label_entry
*ent
)
2830 return DECL_UID (ent
->label_decl
);
2834 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2836 return a
->label_decl
== b
->label_decl
;
2839 /* Create a new label, named ID. */
2842 make_label_decl (tree id
, int local_p
)
2844 struct named_label_entry
*ent
;
2847 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2849 DECL_CONTEXT (decl
) = current_function_decl
;
2850 DECL_MODE (decl
) = VOIDmode
;
2851 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2853 /* Say where one reference is to the label, for the sake of the
2854 error if it is not defined. */
2855 DECL_SOURCE_LOCATION (decl
) = input_location
;
2857 /* Record the fact that this identifier is bound to this label. */
2858 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2860 /* Create the label htab for the function on demand. */
2862 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2864 /* Record this label on the list of labels used in this function.
2865 We do this before calling make_label_decl so that we get the
2866 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2867 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2868 ent
->label_decl
= decl
;
2870 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2871 gcc_assert (*slot
== NULL
);
2877 /* Look for a label named ID in the current function. If one cannot
2878 be found, create one. (We keep track of used, but undefined,
2879 labels, and complain about them at the end of a function.) */
2882 lookup_label_1 (tree id
)
2886 /* You can't use labels at global scope. */
2887 if (current_function_decl
== NULL_TREE
)
2889 error ("label %qE referenced outside of any function", id
);
2893 /* See if we've already got this label. */
2894 decl
= IDENTIFIER_LABEL_VALUE (id
);
2895 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2898 decl
= make_label_decl (id
, /*local_p=*/0);
2902 /* Wrapper for lookup_label_1. */
2905 lookup_label (tree id
)
2908 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2909 ret
= lookup_label_1 (id
);
2910 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2914 /* Declare a local label named ID. */
2917 declare_local_label (tree id
)
2920 cp_label_binding bind
;
2922 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2923 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2924 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2926 decl
= make_label_decl (id
, /*local_p=*/1);
2928 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2933 /* Returns nonzero if it is ill-formed to jump past the declaration of
2934 DECL. Returns 2 if it's also a real problem. */
2937 decl_jump_unsafe (tree decl
)
2939 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2940 with automatic storage duration is not in scope to a point where it is
2941 in scope is ill-formed unless the variable has scalar type, class type
2942 with a trivial default constructor and a trivial destructor, a
2943 cv-qualified version of one of these types, or an array of one of the
2944 preceding types and is declared without an initializer (8.5). */
2945 tree type
= TREE_TYPE (decl
);
2947 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2948 || type
== error_mark_node
)
2951 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2952 || variably_modified_type_p (type
, NULL_TREE
))
2955 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2961 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2964 identify_goto (tree decl
, const location_t
*locus
)
2966 bool complained
= (decl
2967 ? permerror (input_location
, "jump to label %qD", decl
)
2968 : permerror (input_location
, "jump to case label"));
2969 if (complained
&& locus
)
2970 inform (*locus
, " from here");
2974 /* Check that a single previously seen jump to a newly defined label
2975 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2976 the jump context; NAMES are the names in scope in LEVEL at the jump
2977 context; LOCUS is the source position of the jump or 0. Returns
2978 true if all is well. */
2981 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2982 bool exited_omp
, const location_t
*locus
)
2984 cp_binding_level
*b
;
2985 bool identified
= false, complained
= false;
2986 bool saw_eh
= false, saw_omp
= false, saw_tm
= false;
2990 complained
= identify_goto (decl
, locus
);
2992 inform (input_location
, " exits OpenMP structured block");
2993 identified
= saw_omp
= true;
2996 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2998 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
3000 for (new_decls
= b
->names
; new_decls
!= old_decls
;
3001 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
3002 : TREE_CHAIN (new_decls
)))
3004 int problem
= decl_jump_unsafe (new_decls
);
3010 complained
= identify_goto (decl
, locus
);
3016 inform (DECL_SOURCE_LOCATION (new_decls
),
3017 " crosses initialization of %q#D", new_decls
);
3019 inform (DECL_SOURCE_LOCATION (new_decls
),
3020 " enters scope of %q#D which has "
3021 "non-trivial destructor", new_decls
);
3027 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
3031 complained
= identify_goto (decl
, locus
);
3036 if (b
->kind
== sk_try
)
3037 inform (input_location
, " enters try block");
3039 inform (input_location
, " enters catch block");
3043 if (b
->kind
== sk_omp
&& !saw_omp
)
3047 complained
= identify_goto (decl
, locus
);
3051 inform (input_location
, " enters OpenMP structured block");
3054 if (b
->kind
== sk_transaction
&& !saw_tm
)
3058 complained
= identify_goto (decl
, locus
);
3062 inform (input_location
,
3063 " enters synchronized or atomic statement");
3072 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
3074 check_previous_goto_1 (decl
, use
->binding_level
,
3075 use
->names_in_scope
, use
->in_omp_scope
,
3076 &use
->o_goto_locus
);
3080 check_switch_goto (cp_binding_level
* level
)
3082 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3085 /* Check that a new jump to a label DECL is OK. Called by
3086 finish_goto_stmt. */
3089 check_goto (tree decl
)
3091 struct named_label_entry
*ent
, dummy
;
3092 bool saw_catch
= false, identified
= false, complained
= false;
3096 /* We can't know where a computed goto is jumping.
3097 So we assume that it's OK. */
3098 if (TREE_CODE (decl
) != LABEL_DECL
)
3101 /* We didn't record any information about this label when we created it,
3102 and there's not much point since it's trivial to analyze as a return. */
3103 if (decl
== cdtor_label
)
3106 dummy
.label_decl
= decl
;
3107 ent
= named_labels
->find (&dummy
);
3108 gcc_assert (ent
!= NULL
);
3110 /* If the label hasn't been defined yet, defer checking. */
3111 if (! DECL_INITIAL (decl
))
3113 struct named_label_use_entry
*new_use
;
3115 /* Don't bother creating another use if the last goto had the
3116 same data, and will therefore create the same set of errors. */
3118 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3121 new_use
= ggc_alloc
<named_label_use_entry
> ();
3122 new_use
->binding_level
= current_binding_level
;
3123 new_use
->names_in_scope
= current_binding_level
->names
;
3124 new_use
->o_goto_locus
= input_location
;
3125 new_use
->in_omp_scope
= false;
3127 new_use
->next
= ent
->uses
;
3128 ent
->uses
= new_use
;
3132 if (ent
->in_try_scope
|| ent
->in_catch_scope
|| ent
->in_transaction_scope
3133 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3135 complained
= permerror (DECL_SOURCE_LOCATION (decl
),
3136 "jump to label %qD", decl
);
3138 inform (input_location
, " from here");
3142 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3144 int u
= decl_jump_unsafe (bad
);
3146 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3148 /* Can't skip init of __exception_info. */
3150 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3153 else if (complained
)
3156 inform (DECL_SOURCE_LOCATION (bad
),
3157 " skips initialization of %q#D", bad
);
3159 inform (DECL_SOURCE_LOCATION (bad
),
3160 " enters scope of %q#D which has "
3161 "non-trivial destructor", bad
);
3167 if (ent
->in_try_scope
)
3168 inform (input_location
, " enters try block");
3169 else if (ent
->in_catch_scope
&& !saw_catch
)
3170 inform (input_location
, " enters catch block");
3171 else if (ent
->in_transaction_scope
)
3172 inform (input_location
, " enters synchronized or atomic statement");
3175 if (ent
->in_omp_scope
)
3178 inform (input_location
, " enters OpenMP structured block");
3180 else if (flag_openmp
)
3182 cp_binding_level
*b
;
3183 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3185 if (b
== ent
->binding_level
)
3187 if (b
->kind
== sk_omp
)
3191 complained
= permerror (DECL_SOURCE_LOCATION (decl
),
3192 "jump to label %qD", decl
);
3194 inform (input_location
, " from here");
3198 inform (input_location
, " exits OpenMP structured block");
3205 /* Check that a return is ok wrt OpenMP structured blocks.
3206 Called by finish_return_stmt. Returns true if all is well. */
3209 check_omp_return (void)
3211 cp_binding_level
*b
;
3212 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3213 if (b
->kind
== sk_omp
)
3215 error ("invalid exit from OpenMP structured block");
3218 else if (b
->kind
== sk_function_parms
)
3223 /* Define a label, specifying the location in the source file.
3224 Return the LABEL_DECL node for the label. */
3227 define_label_1 (location_t location
, tree name
)
3229 struct named_label_entry
*ent
, dummy
;
3230 cp_binding_level
*p
;
3233 decl
= lookup_label (name
);
3235 dummy
.label_decl
= decl
;
3236 ent
= named_labels
->find (&dummy
);
3237 gcc_assert (ent
!= NULL
);
3239 /* After labels, make any new cleanups in the function go into their
3240 own new (temporary) binding contour. */
3241 for (p
= current_binding_level
;
3242 p
->kind
!= sk_function_parms
;
3244 p
->more_cleanups_ok
= 0;
3246 if (name
== get_identifier ("wchar_t"))
3247 permerror (input_location
, "label named wchar_t");
3249 if (DECL_INITIAL (decl
) != NULL_TREE
)
3251 error ("duplicate label %qD", decl
);
3252 return error_mark_node
;
3256 struct named_label_use_entry
*use
;
3258 /* Mark label as having been defined. */
3259 DECL_INITIAL (decl
) = error_mark_node
;
3260 /* Say where in the source. */
3261 DECL_SOURCE_LOCATION (decl
) = location
;
3263 ent
->binding_level
= current_binding_level
;
3264 ent
->names_in_scope
= current_binding_level
->names
;
3266 for (use
= ent
->uses
; use
; use
= use
->next
)
3267 check_previous_goto (decl
, use
);
3274 /* Wrapper for define_label_1. */
3277 define_label (location_t location
, tree name
)
3280 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3281 ret
= define_label_1 (location
, name
);
3282 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3289 cp_binding_level
*level
;
3290 struct cp_switch
*next
;
3291 /* The SWITCH_STMT being built. */
3293 /* A splay-tree mapping the low element of a case range to the high
3294 element, or NULL_TREE if there is no high element. Used to
3295 determine whether or not a new case label duplicates an old case
3296 label. We need a tree, rather than simply a hash table, because
3297 of the GNU case range extension. */
3299 /* Remember whether there was a case value that is outside the
3300 range of the original type of the controlling expression. */
3301 bool outside_range_p
;
3304 /* A stack of the currently active switch statements. The innermost
3305 switch statement is on the top of the stack. There is no need to
3306 mark the stack for garbage collection because it is only active
3307 during the processing of the body of a function, and we never
3308 collect at that point. */
3310 static struct cp_switch
*switch_stack
;
3312 /* Called right after a switch-statement condition is parsed.
3313 SWITCH_STMT is the switch statement being parsed. */
3316 push_switch (tree switch_stmt
)
3318 struct cp_switch
*p
= XNEW (struct cp_switch
);
3319 p
->level
= current_binding_level
;
3320 p
->next
= switch_stack
;
3321 p
->switch_stmt
= switch_stmt
;
3322 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3323 p
->outside_range_p
= false;
3330 struct cp_switch
*cs
= switch_stack
;
3331 location_t switch_location
;
3333 /* Emit warnings as needed. */
3334 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3335 const bool bool_cond_p
3336 = (SWITCH_STMT_TYPE (cs
->switch_stmt
)
3337 && TREE_CODE (SWITCH_STMT_TYPE (cs
->switch_stmt
)) == BOOLEAN_TYPE
);
3338 if (!processing_template_decl
)
3339 c_do_switch_warnings (cs
->cases
, switch_location
,
3340 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3341 SWITCH_STMT_COND (cs
->switch_stmt
),
3342 bool_cond_p
, cs
->outside_range_p
);
3344 splay_tree_delete (cs
->cases
);
3345 switch_stack
= switch_stack
->next
;
3349 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3350 condition. Note that if TYPE and VALUE are already integral we don't
3351 really do the conversion because the language-independent
3352 warning/optimization code will work better that way. */
3355 case_conversion (tree type
, tree value
)
3357 if (value
== NULL_TREE
)
3360 if (cxx_dialect
>= cxx11
3361 && (SCOPED_ENUM_P (type
)
3362 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3364 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3365 type
= type_promotes_to (type
);
3366 value
= (perform_implicit_conversion_flags
3367 (type
, value
, tf_warning_or_error
,
3368 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3370 return cxx_constant_value (value
);
3373 /* Note that we've seen a definition of a case label, and complain if this
3374 is a bad place for one. */
3377 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3380 cp_binding_level
*p
;
3383 if (processing_template_decl
)
3387 /* For templates, just add the case label; we'll do semantic
3388 analysis at instantiation-time. */
3389 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3390 return add_stmt (build_case_label (low_value
, high_value
, label
));
3393 /* Find the condition on which this switch statement depends. */
3394 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3395 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3396 cond
= TREE_VALUE (cond
);
3398 if (!check_switch_goto (switch_stack
->level
))
3399 return error_mark_node
;
3401 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3403 low_value
= case_conversion (type
, low_value
);
3404 high_value
= case_conversion (type
, high_value
);
3406 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3407 low_value
, high_value
,
3408 &switch_stack
->outside_range_p
);
3410 /* After labels, make any new cleanups in the function go into their
3411 own new (temporary) binding contour. */
3412 for (p
= current_binding_level
;
3413 p
->kind
!= sk_function_parms
;
3415 p
->more_cleanups_ok
= 0;
3420 struct typename_info
{
3428 struct typename_hasher
: ggc_ptr_hash
<tree_node
>
3430 typedef typename_info
*compare_type
;
3432 /* Hash a TYPENAME_TYPE. */
3439 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3440 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3445 /* Compare two TYPENAME_TYPEs. */
3448 equal (tree t1
, const typename_info
*t2
)
3450 return (TYPE_IDENTIFIER (t1
) == t2
->name
3451 && TYPE_CONTEXT (t1
) == t2
->scope
3452 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3453 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3454 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3458 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3459 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3461 Returns the new TYPENAME_TYPE. */
3463 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3466 build_typename_type (tree context
, tree name
, tree fullname
,
3467 enum tag_types tag_type
)
3475 if (typename_htab
== NULL
)
3476 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3478 ti
.scope
= FROB_CONTEXT (context
);
3480 ti
.template_id
= fullname
;
3481 ti
.enum_p
= tag_type
== enum_type
;
3482 ti
.class_p
= (tag_type
== class_type
3483 || tag_type
== record_type
3484 || tag_type
== union_type
);
3485 hash
= (htab_hash_pointer (ti
.scope
)
3486 ^ htab_hash_pointer (ti
.name
));
3488 /* See if we already have this type. */
3489 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3494 /* Build the TYPENAME_TYPE. */
3495 t
= cxx_make_type (TYPENAME_TYPE
);
3496 TYPE_CONTEXT (t
) = ti
.scope
;
3497 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3498 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3499 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3501 /* Build the corresponding TYPE_DECL. */
3502 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3503 TYPE_NAME (TREE_TYPE (d
)) = d
;
3504 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3505 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3506 DECL_ARTIFICIAL (d
) = 1;
3508 /* Store it in the hash table. */
3511 /* TYPENAME_TYPEs must always be compared structurally, because
3512 they may or may not resolve down to another type depending on
3513 the currently open classes. */
3514 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3520 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3521 provided to name the type. Returns an appropriate type, unless an
3522 error occurs, in which case error_mark_node is returned. If we
3523 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3524 return that, rather than the _TYPE it corresponds to, in other
3525 cases we look through the type decl. If TF_ERROR is set, complain
3526 about errors, otherwise be quiet. */
3529 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3530 tsubst_flags_t complain
)
3536 if (name
== error_mark_node
3537 || context
== NULL_TREE
3538 || context
== error_mark_node
)
3539 return error_mark_node
;
3543 if (!(TYPE_LANG_SPECIFIC (name
)
3544 && (CLASSTYPE_IS_TEMPLATE (name
)
3545 || CLASSTYPE_USE_TEMPLATE (name
))))
3546 name
= TYPE_IDENTIFIER (name
);
3548 /* Create a TEMPLATE_ID_EXPR for the type. */
3549 name
= build_nt (TEMPLATE_ID_EXPR
,
3550 CLASSTYPE_TI_TEMPLATE (name
),
3551 CLASSTYPE_TI_ARGS (name
));
3553 else if (TREE_CODE (name
) == TYPE_DECL
)
3554 name
= DECL_NAME (name
);
3558 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3560 name
= TREE_OPERAND (name
, 0);
3561 if (DECL_TYPE_TEMPLATE_P (name
))
3562 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3563 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3565 if (complain
& tf_error
)
3566 error ("%qD is not a type", name
);
3567 return error_mark_node
;
3570 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3572 if (complain
& tf_error
)
3573 error ("%qD used without template parameters", name
);
3574 return error_mark_node
;
3576 gcc_assert (identifier_p (name
));
3577 gcc_assert (TYPE_P (context
));
3579 if (!MAYBE_CLASS_TYPE_P (context
))
3581 if (complain
& tf_error
)
3582 error ("%q#T is not a class", context
);
3583 return error_mark_node
;
3586 /* When the CONTEXT is a dependent type, NAME could refer to a
3587 dependent base class of CONTEXT. But look inside it anyway
3588 if CONTEXT is a currently open scope, in case it refers to a
3589 member of the current instantiation or a non-dependent base;
3590 lookup will stop when we hit a dependent base. */
3591 if (!dependent_scope_p (context
))
3592 /* We should only set WANT_TYPE when we're a nested typename type.
3593 Then we can give better diagnostics if we find a non-type. */
3594 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3598 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3599 return build_typename_type (context
, name
, fullname
, tag_type
);
3601 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3605 if (complain
& tf_error
)
3606 error (want_template
? G_("no class template named %q#T in %q#T")
3607 : G_("no type named %q#T in %q#T"), name
, context
);
3608 return error_mark_node
;
3611 /* Pull out the template from an injected-class-name (or multiple). */
3613 t
= maybe_get_template_decl_from_type_decl (t
);
3615 if (TREE_CODE (t
) == TREE_LIST
)
3617 if (complain
& tf_error
)
3619 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3620 print_candidates (t
);
3622 return error_mark_node
;
3625 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3627 if (complain
& tf_error
)
3628 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3630 return error_mark_node
;
3632 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3634 if (complain
& tf_error
)
3635 error ("%<typename %T::%D%> names %q#T, which is not a type",
3637 return error_mark_node
;
3640 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3641 return error_mark_node
;
3643 /* If we are currently parsing a template and if T is a typedef accessed
3644 through CONTEXT then we need to remember and check access of T at
3645 template instantiation time. */
3646 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3649 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3651 /*entering_scope=*/0,
3652 complain
| tf_user
);
3654 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3657 maybe_record_typedef_use (t
);
3662 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3663 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3664 in which case error_mark_node is returned.
3666 If PARM_LIST is non-NULL, also make sure that the template parameter
3667 list of TEMPLATE_DECL matches.
3669 If COMPLAIN zero, don't complain about any errors that occur. */
3672 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3673 tsubst_flags_t complain
)
3679 name
= TYPE_IDENTIFIER (name
);
3680 else if (DECL_P (name
))
3681 name
= DECL_NAME (name
);
3682 gcc_assert (identifier_p (name
));
3684 if (!dependent_type_p (context
)
3685 || currently_open_class (context
))
3687 tree tmpl
= NULL_TREE
;
3689 if (MAYBE_CLASS_TYPE_P (context
))
3690 tmpl
= lookup_field (context
, name
, 0, false);
3692 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3693 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3695 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3697 if (complain
& tf_error
)
3698 error ("no class template named %q#T in %q#T", name
, context
);
3699 return error_mark_node
;
3703 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3705 if (complain
& tf_error
)
3707 error ("template parameters do not match template %qD", tmpl
);
3708 inform (DECL_SOURCE_LOCATION (tmpl
),
3709 "%qD declared here", tmpl
);
3711 return error_mark_node
;
3714 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3716 return error_mark_node
;
3721 /* Build the UNBOUND_CLASS_TEMPLATE. */
3722 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3723 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3724 TREE_TYPE (t
) = NULL_TREE
;
3725 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3727 /* Build the corresponding TEMPLATE_DECL. */
3728 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3729 TYPE_NAME (TREE_TYPE (d
)) = d
;
3730 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3731 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3732 DECL_ARTIFICIAL (d
) = 1;
3733 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3740 /* Push the declarations of builtin types into the namespace.
3741 RID_INDEX is the index of the builtin type in the array
3742 RID_POINTERS. NAME is the name used when looking up the builtin
3743 type. TYPE is the _TYPE node for the builtin type. */
3746 record_builtin_type (enum rid rid_index
,
3750 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3751 tree tdecl
= NULL_TREE
;
3753 if ((int) rid_index
< (int) RID_MAX
)
3754 rname
= ridpointers
[(int) rid_index
];
3756 tname
= get_identifier (name
);
3758 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3759 eliminated. Built-in types should not be looked up name; their
3760 names are keywords that the parser can recognize. However, there
3761 is code in c-common.c that uses identifier_global_value to look
3762 up built-in types by name. */
3765 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3766 DECL_ARTIFICIAL (tdecl
) = 1;
3767 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3773 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3774 DECL_ARTIFICIAL (tdecl
) = 1;
3776 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3779 if (!TYPE_NAME (type
))
3780 TYPE_NAME (type
) = tdecl
;
3783 debug_hooks
->type_decl (tdecl
, 0);
3786 /* Record one of the standard Java types.
3787 * Declare it as having the given NAME.
3788 * If SIZE > 0, it is the size of one of the integral types;
3789 * otherwise it is the negative of the size of one of the other types. */
3792 record_builtin_java_type (const char* name
, int size
)
3797 type
= build_nonstandard_integer_type (size
, 0);
3798 type
= build_distinct_type_copy (type
);
3800 else if (size
> -32)
3803 /* "__java_char" or ""__java_boolean". */
3804 type
= build_nonstandard_integer_type (-size
, 1);
3805 type
= build_distinct_type_copy (type
);
3806 /* Get the signed type cached and attached to the unsigned type,
3807 so it doesn't get garbage-collected at "random" times,
3808 causing potential codegen differences out of different UIDs
3809 and different alias set numbers. */
3810 stype
= build_nonstandard_integer_type (-size
, 0);
3811 stype
= build_distinct_type_copy (stype
);
3812 TREE_CHAIN (type
) = stype
;
3813 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3816 { /* "__java_float" or ""__java_double". */
3817 type
= make_node (REAL_TYPE
);
3818 TYPE_PRECISION (type
) = - size
;
3821 record_builtin_type (RID_MAX
, name
, type
);
3822 decl
= TYPE_NAME (type
);
3824 /* Suppress generate debug symbol entries for these types,
3825 since for normal C++ they are just clutter.
3826 However, push_lang_context undoes this if extern "Java" is seen. */
3827 DECL_IGNORED_P (decl
) = 1;
3829 TYPE_FOR_JAVA (type
) = 1;
3833 /* Push a type into the namespace so that the back ends ignore it. */
3836 record_unknown_type (tree type
, const char* name
)
3838 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3839 TYPE_DECL
, get_identifier (name
), type
));
3840 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3841 DECL_IGNORED_P (decl
) = 1;
3842 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3843 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3844 TYPE_ALIGN (type
) = 1;
3845 TYPE_USER_ALIGN (type
) = 0;
3846 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3849 /* A string for which we should create an IDENTIFIER_NODE at
3852 struct predefined_identifier
3854 /* The name of the identifier. */
3855 const char *const name
;
3856 /* The place where the IDENTIFIER_NODE should be stored. */
3858 /* Nonzero if this is the name of a constructor or destructor. */
3859 const int ctor_or_dtor_p
;
3862 /* Create all the predefined identifiers. */
3865 initialize_predefined_identifiers (void)
3867 const predefined_identifier
*pid
;
3869 /* A table of identifiers to create at startup. */
3870 static const predefined_identifier predefined_identifiers
[] = {
3871 { "C++", &lang_name_cplusplus
, 0 },
3872 { "C", &lang_name_c
, 0 },
3873 { "Java", &lang_name_java
, 0 },
3874 /* Some of these names have a trailing space so that it is
3875 impossible for them to conflict with names written by users. */
3876 { "__ct ", &ctor_identifier
, 1 },
3877 { "__base_ctor ", &base_ctor_identifier
, 1 },
3878 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3879 { "__dt ", &dtor_identifier
, 1 },
3880 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3881 { "__base_dtor ", &base_dtor_identifier
, 1 },
3882 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3883 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3884 { "nelts", &nelts_identifier
, 0 },
3885 { THIS_NAME
, &this_identifier
, 0 },
3886 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3887 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3888 { "_vptr", &vptr_identifier
, 0 },
3889 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3890 { "::", &global_scope_name
, 0 },
3891 { "std", &std_identifier
, 0 },
3895 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3897 *pid
->node
= get_identifier (pid
->name
);
3898 if (pid
->ctor_or_dtor_p
)
3899 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3903 /* Create the predefined scalar types of C,
3904 and some nodes representing standard constants (0, 1, (void *)0).
3905 Initialize the global binding level.
3906 Make definitions for built-in primitive functions. */
3909 cxx_init_decl_processing (void)
3912 tree void_ftype_ptr
;
3914 /* Create all the identifiers we need. */
3915 initialize_predefined_identifiers ();
3917 /* Create the global variables. */
3918 push_to_top_level ();
3920 current_function_decl
= NULL_TREE
;
3921 current_binding_level
= NULL
;
3922 /* Enter the global namespace. */
3923 gcc_assert (global_namespace
== NULL_TREE
);
3924 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3926 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3927 debug_hooks
->register_main_translation_unit
3928 (DECL_CONTEXT (global_namespace
));
3929 TREE_PUBLIC (global_namespace
) = 1;
3930 begin_scope (sk_namespace
, global_namespace
);
3932 if (flag_visibility_ms_compat
)
3933 default_visibility
= VISIBILITY_HIDDEN
;
3936 current_lang_name
= lang_name_c
;
3938 /* Create the `std' namespace. */
3939 push_namespace (std_identifier
);
3940 std_node
= current_namespace
;
3943 c_common_nodes_and_builtins ();
3945 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3946 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3947 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3948 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3949 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3950 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3951 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3952 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3954 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3956 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3957 truthvalue_type_node
= boolean_type_node
;
3958 truthvalue_false_node
= boolean_false_node
;
3959 truthvalue_true_node
= boolean_true_node
;
3961 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3962 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3963 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3966 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3969 delta_type_node
= ptrdiff_type_node
;
3970 vtable_index_type
= ptrdiff_type_node
;
3972 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3973 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3974 void_ftype_ptr
= build_function_type_list (void_type_node
,
3975 ptr_type_node
, NULL_TREE
);
3977 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3979 /* C++ extensions */
3981 unknown_type_node
= make_node (LANG_TYPE
);
3982 record_unknown_type (unknown_type_node
, "unknown type");
3984 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3985 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3987 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3989 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3990 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3992 init_list_type_node
= make_node (LANG_TYPE
);
3993 record_unknown_type (init_list_type_node
, "init list");
3996 /* Make sure we get a unique function type, so we can give
3997 its pointer type a name. (This wins for gdb.) */
3998 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3999 TREE_TYPE (vfunc_type
) = integer_type_node
;
4000 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
4001 layout_type (vfunc_type
);
4003 vtable_entry_type
= build_pointer_type (vfunc_type
);
4005 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
4008 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
4009 layout_type (vtbl_type_node
);
4010 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
4011 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
4012 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
4013 layout_type (vtbl_ptr_type_node
);
4014 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
4016 push_namespace (get_identifier ("__cxxabiv1"));
4017 abi_node
= current_namespace
;
4020 global_type_node
= make_node (LANG_TYPE
);
4021 record_unknown_type (global_type_node
, "global type");
4024 current_lang_name
= lang_name_cplusplus
;
4027 tree newattrs
, extvisattr
;
4028 tree newtype
, deltype
;
4029 tree ptr_ftype_sizetype
;
4033 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
4034 if (cxx_dialect
== cxx98
)
4037 tree bad_alloc_type_node
;
4038 tree bad_alloc_decl
;
4040 push_namespace (std_identifier
);
4041 bad_alloc_id
= get_identifier ("bad_alloc");
4042 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
4043 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
4045 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
4046 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
4050 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
4053 new_eh_spec
= noexcept_false_spec
;
4055 /* Ensure attribs.c is initialized. */
4058 /* Ensure constraint.cc is initialized. */
4059 init_constraint_processing ();
4061 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
4063 newattrs
= tree_cons (get_identifier ("alloc_size"),
4064 build_tree_list (NULL_TREE
, integer_one_node
),
4066 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
4067 newtype
= build_exception_variant (newtype
, new_eh_spec
);
4068 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
4069 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4070 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
4071 DECL_IS_MALLOC (opnew
) = 1;
4072 DECL_IS_OPERATOR_NEW (opnew
) = 1;
4073 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
4074 DECL_IS_MALLOC (opnew
) = 1;
4075 DECL_IS_OPERATOR_NEW (opnew
) = 1;
4076 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4077 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4078 if (flag_sized_deallocation
)
4080 /* Also push the sized deallocation variants:
4081 void operator delete(void*, std::size_t) throw();
4082 void operator delete[](void*, std::size_t) throw(); */
4083 tree void_ftype_ptr_size
4084 = build_function_type_list (void_type_node
, ptr_type_node
,
4085 size_type_node
, NULL_TREE
);
4086 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4088 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4089 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4090 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4093 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4094 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4095 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4096 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4097 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4098 if (abi_version_at_least (9))
4099 TYPE_ALIGN (nullptr_type_node
) = GET_MODE_ALIGNMENT (ptr_mode
);
4100 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4101 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4102 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4106 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4107 ECF_NORETURN
| ECF_NOTHROW
);
4109 /* Perform other language dependent initializations. */
4110 init_class_processing ();
4111 init_rtti_processing ();
4112 init_template_processing ();
4114 if (flag_exceptions
)
4115 init_exception_processing ();
4117 if (! supports_one_only ())
4120 make_fname_decl
= cp_make_fname_decl
;
4121 start_fname_decls ();
4123 /* Show we use EH for cleanups. */
4124 if (flag_exceptions
)
4125 using_eh_for_cleanups ();
4128 /* Generate an initializer for a function naming variable from
4129 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4130 filled in with the type of the init. */
4133 cp_fname_init (const char* name
, tree
*type_p
)
4135 tree domain
= NULL_TREE
;
4137 tree init
= NULL_TREE
;
4142 length
= strlen (name
);
4143 domain
= build_index_type (size_int (length
));
4144 init
= build_string (length
+ 1, name
);
4147 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4148 type
= build_cplus_array_type (type
, domain
);
4153 TREE_TYPE (init
) = type
;
4155 init
= error_mark_node
;
4160 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4161 the decl, LOC is the location to give the decl, NAME is the
4162 initialization string and TYPE_DEP indicates whether NAME depended
4163 on the type of the function. We make use of that to detect
4164 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4165 at the point of first use, so we mustn't push the decl now. */
4168 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4170 const char *const name
= (type_dep
&& processing_template_decl
4171 ? NULL
: fname_as_string (type_dep
));
4173 tree init
= cp_fname_init (name
, &type
);
4174 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4177 free (CONST_CAST (char *, name
));
4179 /* As we're using pushdecl_with_scope, we must set the context. */
4180 DECL_CONTEXT (decl
) = current_function_decl
;
4182 TREE_STATIC (decl
) = 1;
4183 TREE_READONLY (decl
) = 1;
4184 DECL_ARTIFICIAL (decl
) = 1;
4186 TREE_USED (decl
) = 1;
4188 if (current_function_decl
)
4190 cp_binding_level
*b
= current_binding_level
;
4191 if (b
->kind
== sk_function_parms
)
4192 return error_mark_node
;
4193 while (b
->level_chain
->kind
!= sk_function_parms
)
4195 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4196 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4197 LOOKUP_ONLYCONVERTING
);
4201 DECL_THIS_STATIC (decl
) = true;
4202 pushdecl_top_level_and_finish (decl
, init
);
4209 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4211 tree id
= DECL_NAME (decl
);
4212 const char *name
= IDENTIFIER_POINTER (id
);
4214 retrofit_lang_decl (decl
);
4216 DECL_ARTIFICIAL (decl
) = 1;
4217 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4218 SET_DECL_LANGUAGE (decl
, lang_c
);
4219 /* Runtime library routines are, by definition, available in an
4220 external shared object. */
4221 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4222 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4224 DECL_CONTEXT (decl
) = context
;
4227 pushdecl_top_level (decl
);
4231 /* A function in the user's namespace should have an explicit
4232 declaration before it is used. Mark the built-in function as
4233 anticipated but not actually declared. */
4234 if (name
[0] != '_' || name
[1] != '_')
4235 DECL_ANTICIPATED (decl
) = 1;
4236 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4238 size_t len
= strlen (name
);
4240 /* Treat __*_chk fortification functions as anticipated as well,
4241 unless they are __builtin_*. */
4242 if (len
> strlen ("___chk")
4243 && memcmp (name
+ len
- strlen ("_chk"),
4244 "_chk", strlen ("_chk") + 1) == 0)
4245 DECL_ANTICIPATED (decl
) = 1;
4252 cxx_builtin_function (tree decl
)
4254 tree id
= DECL_NAME (decl
);
4255 const char *name
= IDENTIFIER_POINTER (id
);
4256 /* All builtins that don't begin with an '_' should additionally
4257 go in the 'std' namespace. */
4260 tree decl2
= copy_node(decl
);
4261 push_namespace (std_identifier
);
4262 builtin_function_1 (decl2
, std_node
, false);
4266 return builtin_function_1 (decl
, NULL_TREE
, false);
4269 /* Like cxx_builtin_function, but guarantee the function is added to the global
4270 scope. This is to allow function specific options to add new machine
4271 dependent builtins when the target ISA changes via attribute((target(...)))
4272 which saves space on program startup if the program does not use non-generic
4276 cxx_builtin_function_ext_scope (tree decl
)
4279 tree id
= DECL_NAME (decl
);
4280 const char *name
= IDENTIFIER_POINTER (id
);
4281 /* All builtins that don't begin with an '_' should additionally
4282 go in the 'std' namespace. */
4285 tree decl2
= copy_node(decl
);
4286 push_namespace (std_identifier
);
4287 builtin_function_1 (decl2
, std_node
, true);
4291 return builtin_function_1 (decl
, NULL_TREE
, true);
4294 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4295 function. Not called directly. */
4298 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4301 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4302 DECL_EXTERNAL (fn
) = 1;
4303 TREE_PUBLIC (fn
) = 1;
4304 DECL_ARTIFICIAL (fn
) = 1;
4305 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4306 SET_DECL_LANGUAGE (fn
, lang_c
);
4307 /* Runtime library routines are, by definition, available in an
4308 external shared object. */
4309 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4310 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4311 set_call_expr_flags (fn
, ecf_flags
);
4315 /* Returns the _DECL for a library function with C++ linkage. */
4318 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4321 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4322 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4323 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4327 /* Like build_library_fn, but takes a C string instead of an
4331 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4333 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4336 /* Like build_cp_library_fn, but takes a C string instead of an
4340 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4342 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4346 /* Like build_library_fn, but also pushes the function so that we will
4347 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4348 may throw exceptions listed in RAISES. */
4351 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4356 type
= build_exception_variant (type
, raises
);
4358 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4359 pushdecl_top_level (fn
);
4363 /* Like build_cp_library_fn, but also pushes the function so that it
4364 will be found by normal lookup. */
4367 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4370 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4375 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4379 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4383 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4385 tree type
= build_function_type (void_type_node
, parmtypes
);
4386 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4389 /* Like push_library_fn, but also note that this function throws
4390 and does not return. Used for __throw_foo and the like. */
4393 push_throw_library_fn (tree name
, tree type
)
4395 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4399 /* When we call finish_struct for an anonymous union, we create
4400 default copy constructors and such. But, an anonymous union
4401 shouldn't have such things; this function undoes the damage to the
4402 anonymous union type T.
4404 (The reason that we create the synthesized methods is that we don't
4405 distinguish `union { int i; }' from `typedef union { int i; } U'.
4406 The first is an anonymous union; the second is just an ordinary
4410 fixup_anonymous_aggr (tree t
)
4414 /* Wipe out memory of synthesized methods. */
4415 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4416 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4417 TYPE_HAS_COPY_CTOR (t
) = 0;
4418 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4419 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4420 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4422 /* Splice the implicitly generated functions out of the TYPE_METHODS
4424 q
= &TYPE_METHODS (t
);
4427 if (DECL_ARTIFICIAL (*q
))
4428 *q
= TREE_CHAIN (*q
);
4430 q
= &DECL_CHAIN (*q
);
4433 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4434 if (TYPE_METHODS (t
))
4436 tree decl
= TYPE_MAIN_DECL (t
);
4438 if (TREE_CODE (t
) != UNION_TYPE
)
4439 error_at (DECL_SOURCE_LOCATION (decl
),
4440 "an anonymous struct cannot have function members");
4442 error_at (DECL_SOURCE_LOCATION (decl
),
4443 "an anonymous union cannot have function members");
4446 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4447 assignment operators (because they cannot have these methods themselves).
4448 For anonymous unions this is already checked because they are not allowed
4449 in any union, otherwise we have to check it. */
4450 if (TREE_CODE (t
) != UNION_TYPE
)
4454 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4455 if (TREE_CODE (field
) == FIELD_DECL
)
4457 type
= TREE_TYPE (field
);
4458 if (CLASS_TYPE_P (type
))
4460 if (TYPE_NEEDS_CONSTRUCTING (type
))
4461 error ("member %q+#D with constructor not allowed "
4462 "in anonymous aggregate", field
);
4463 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4464 error ("member %q+#D with destructor not allowed "
4465 "in anonymous aggregate", field
);
4466 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4467 error ("member %q+#D with copy assignment operator "
4468 "not allowed in anonymous aggregate", field
);
4474 /* Warn for an attribute located at LOCATION that appertains to the
4475 class type CLASS_TYPE that has not been properly placed after its
4476 class-key, in it class-specifier. */
4479 warn_misplaced_attr_for_class_type (source_location location
,
4482 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4484 if (warning_at (location
, OPT_Wattributes
,
4485 "attribute ignored in declaration "
4486 "of %q#T", class_type
))
4488 "attribute for %q#T must follow the %qs keyword",
4489 class_type
, class_key_or_enum_as_string (class_type
));
4492 /* Make sure that a declaration with no declarator is well-formed, i.e.
4493 just declares a tagged type or anonymous union.
4495 Returns the type declared; or NULL_TREE if none. */
4498 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4499 bool explicit_type_instantiation_p
)
4501 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4502 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4503 /* If a class, struct, or enum type is declared by the DECLSPECS
4504 (i.e, if a class-specifier, enum-specifier, or non-typename
4505 elaborated-type-specifier appears in the DECLSPECS),
4506 DECLARED_TYPE is set to the corresponding type. */
4507 tree declared_type
= NULL_TREE
;
4508 bool error_p
= false;
4510 if (declspecs
->multiple_types_p
)
4511 error ("multiple types in one declaration");
4512 else if (declspecs
->redefined_builtin_type
)
4514 if (!in_system_header_at (input_location
))
4515 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4516 "redeclaration of C++ built-in type %qT",
4517 declspecs
->redefined_builtin_type
);
4522 && TYPE_P (declspecs
->type
)
4523 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4524 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4525 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4526 declared_type
= declspecs
->type
;
4527 else if (declspecs
->type
== error_mark_node
)
4529 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4530 permerror (input_location
, "declaration does not declare anything");
4531 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4533 error ("%<auto%> can only be specified for variables "
4534 "or function declarations");
4535 return error_mark_node
;
4537 /* Check for an anonymous union. */
4538 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4539 && TYPE_ANONYMOUS_P (declared_type
))
4541 /* 7/3 In a simple-declaration, the optional init-declarator-list
4542 can be omitted only when declaring a class (clause 9) or
4543 enumeration (7.2), that is, when the decl-specifier-seq contains
4544 either a class-specifier, an elaborated-type-specifier with
4545 a class-key (9.1), or an enum-specifier. In these cases and
4546 whenever a class-specifier or enum-specifier is present in the
4547 decl-specifier-seq, the identifiers in these specifiers are among
4548 the names being declared by the declaration (as class-name,
4549 enum-names, or enumerators, depending on the syntax). In such
4550 cases, and except for the declaration of an unnamed bit-field (9.6),
4551 the decl-specifier-seq shall introduce one or more names into the
4552 program, or shall redeclare a name introduced by a previous
4553 declaration. [Example:
4554 enum { }; // ill-formed
4555 typedef class { }; // ill-formed
4559 error ("missing type-name in typedef-declaration");
4562 /* Anonymous unions are objects, so they can have specifiers. */;
4563 SET_ANON_AGGR_TYPE_P (declared_type
);
4565 if (TREE_CODE (declared_type
) != UNION_TYPE
4566 && !in_system_header_at (input_location
))
4567 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4572 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4573 error_at (declspecs
->locations
[ds_inline
],
4574 "%<inline%> can only be specified for functions");
4575 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4576 error_at (declspecs
->locations
[ds_virtual
],
4577 "%<virtual%> can only be specified for functions");
4579 && (!current_class_type
4580 || current_scope () != current_class_type
))
4581 error_at (declspecs
->locations
[ds_friend
],
4582 "%<friend%> can only be specified inside a class");
4583 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4584 error_at (declspecs
->locations
[ds_explicit
],
4585 "%<explicit%> can only be specified for constructors");
4586 else if (declspecs
->storage_class
)
4587 error_at (declspecs
->locations
[ds_storage_class
],
4588 "a storage class can only be specified for objects "
4590 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4591 error_at (declspecs
->locations
[ds_const
],
4592 "%<const%> can only be specified for objects and "
4594 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4595 error_at (declspecs
->locations
[ds_volatile
],
4596 "%<volatile%> can only be specified for objects and "
4598 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4599 error_at (declspecs
->locations
[ds_restrict
],
4600 "%<__restrict%> can only be specified for objects and "
4602 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4603 error_at (declspecs
->locations
[ds_thread
],
4604 "%<__thread%> can only be specified for objects "
4606 else if (saw_typedef
)
4607 warning_at (declspecs
->locations
[ds_typedef
], 0,
4608 "%<typedef%> was ignored in this declaration");
4609 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4610 error_at (declspecs
->locations
[ds_constexpr
],
4611 "%<constexpr%> cannot be used for type declarations");
4614 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4617 if (!CLASS_TYPE_P (declared_type
)
4618 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4619 /* For a non-template class, use the name location. */
4620 loc
= location_of (declared_type
);
4622 /* For a template class (an explicit instantiation), use the
4623 current location. */
4624 loc
= input_location
;
4626 if (explicit_type_instantiation_p
)
4627 /* [dcl.attr.grammar]/4:
4629 No attribute-specifier-seq shall appertain to an explicit
4632 if (warning_at (loc
, OPT_Wattributes
,
4633 "attribute ignored in explicit instantiation %q#T",
4636 "no attribute can be applied to "
4637 "an explicit instantiation");
4640 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4643 return declared_type
;
4646 /* Called when a declaration is seen that contains no names to declare.
4647 If its type is a reference to a structure, union or enum inherited
4648 from a containing scope, shadow that tag name for the current scope
4649 with a forward reference.
4650 If its type defines a new named structure or union
4651 or defines an enum, it is valid but we need not do anything here.
4652 Otherwise, it is an error.
4654 C++: may have to grok the declspecs to learn about static,
4655 complain for anonymous unions.
4657 Returns the TYPE declared -- or NULL_TREE if none. */
4660 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4662 tree t
= check_tag_decl (declspecs
,
4663 /*explicit_type_instantiation_p=*/false);
4668 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4671 /* This is where the variables in an anonymous union are
4672 declared. An anonymous union declaration looks like:
4674 because there is no declarator after the union, the parser
4675 sends that declaration here. */
4676 if (ANON_AGGR_TYPE_P (t
))
4678 fixup_anonymous_aggr (t
);
4680 if (TYPE_FIELDS (t
))
4682 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4683 declspecs
, NORMAL
, 0, NULL
);
4684 finish_anon_union (decl
);
4691 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4694 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4695 const cp_declarator
*declarator
,
4696 bool is_template_arg
)
4700 enum decl_context context
4701 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4702 attrs
= type_specifiers
->attributes
;
4703 type_specifiers
->attributes
= NULL_TREE
;
4704 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4705 if (attrs
&& type
!= error_mark_node
)
4707 if (CLASS_TYPE_P (type
))
4708 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4709 "outside of definition", type
);
4710 else if (MAYBE_CLASS_TYPE_P (type
))
4711 /* A template type parameter or other dependent type. */
4712 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4713 "type %qT without an associated declaration", type
);
4715 cplus_decl_attributes (&type
, attrs
, 0);
4720 /* Process a DECLARATOR for a function-scope variable declaration,
4721 namespace-scope variable declaration, or function declaration.
4722 (Function definitions go through start_function; class member
4723 declarations appearing in the body of the class go through
4724 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4725 If an error occurs, the error_mark_node is returned instead.
4727 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4728 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4729 for an explicitly defaulted function, or SD_DELETED for an explicitly
4730 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4731 implicitly initialized via a default constructor. ATTRIBUTES and
4732 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4734 The scope represented by the context of the returned DECL is pushed
4735 (if it is not the global namespace) and is assigned to
4736 *PUSHED_SCOPE_P. The caller is then responsible for calling
4737 pop_scope on *PUSHED_SCOPE_P if it is set. */
4740 start_decl (const cp_declarator
*declarator
,
4741 cp_decl_specifier_seq
*declspecs
,
4744 tree prefix_attributes
,
4745 tree
*pushed_scope_p
)
4753 *pushed_scope_p
= NULL_TREE
;
4755 /* An object declared as __attribute__((deprecated)) suppresses
4756 warnings of uses of other deprecated items. */
4757 if (lookup_attribute ("deprecated", attributes
))
4758 deprecated_state
= DEPRECATED_SUPPRESS
;
4760 attributes
= chainon (attributes
, prefix_attributes
);
4762 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4765 deprecated_state
= DEPRECATED_NORMAL
;
4767 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4768 || decl
== error_mark_node
)
4769 return error_mark_node
;
4771 context
= CP_DECL_CONTEXT (decl
);
4772 if (context
!= global_namespace
)
4773 *pushed_scope_p
= push_scope (context
);
4775 /* Is it valid for this decl to have an initializer at all?
4776 If not, set INITIALIZED to zero, which will indirectly
4777 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4779 && TREE_CODE (decl
) == TYPE_DECL
)
4781 error ("typedef %qD is initialized (use decltype instead)", decl
);
4782 return error_mark_node
;
4787 if (! toplevel_bindings_p ()
4788 && DECL_EXTERNAL (decl
))
4789 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4791 DECL_EXTERNAL (decl
) = 0;
4792 if (toplevel_bindings_p ())
4793 TREE_STATIC (decl
) = 1;
4795 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4797 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4798 record_key_method_defined (decl
);
4800 /* If this is a typedef that names the class for linkage purposes
4801 (7.1.3p8), apply any attributes directly to the type. */
4802 if (TREE_CODE (decl
) == TYPE_DECL
4803 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4804 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4805 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4809 /* Set attributes here so if duplicate decl, will have proper attributes. */
4810 cplus_decl_attributes (&decl
, attributes
, flags
);
4812 /* Dllimported symbols cannot be defined. Static data members (which
4813 can be initialized in-class and dllimported) go through grokfield,
4814 not here, so we don't need to exclude those decls when checking for
4816 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4818 error ("definition of %q#D is marked %<dllimport%>", decl
);
4819 DECL_DLLIMPORT_P (decl
) = 0;
4822 /* If #pragma weak was used, mark the decl weak now. */
4823 if (!processing_template_decl
)
4824 maybe_apply_pragma_weak (decl
);
4826 if (TREE_CODE (decl
) == FUNCTION_DECL
4827 && DECL_DECLARED_INLINE_P (decl
)
4828 && DECL_UNINLINABLE (decl
)
4829 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4830 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4831 "inline function %qD given attribute noinline", decl
);
4833 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4835 bool this_tmpl
= (processing_template_decl
4836 > template_class_depth (context
));
4839 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4840 if (field
== NULL_TREE
4841 || !(VAR_P (field
) || variable_template_p (field
)))
4842 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4843 else if (variable_template_p (field
) && !this_tmpl
)
4845 if (DECL_LANG_SPECIFIC (decl
)
4846 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4847 /* OK, specialization was already checked. */;
4850 error_at (DECL_SOURCE_LOCATION (decl
),
4851 "non-member-template declaration of %qD", decl
);
4852 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4853 "member template declaration here");
4854 return error_mark_node
;
4859 if (variable_template_p (field
))
4860 field
= DECL_TEMPLATE_RESULT (field
);
4862 if (DECL_CONTEXT (field
) != context
)
4864 if (!same_type_p (DECL_CONTEXT (field
), context
))
4865 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4866 "to be defined as %<%T::%D%>",
4867 DECL_CONTEXT (field
), DECL_NAME (decl
),
4868 context
, DECL_NAME (decl
));
4869 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4871 /* Static data member are tricky; an in-class initialization
4872 still doesn't provide a definition, so the in-class
4873 declaration will have DECL_EXTERNAL set, but will have an
4874 initialization. Thus, duplicate_decls won't warn
4875 about this situation, and so we check here. */
4876 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4877 error ("duplicate initialization of %qD", decl
);
4878 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4880 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4881 && !DECL_DECLARED_CONSTEXPR_P (field
))
4882 error ("%qD declared %<constexpr%> outside its class", field
);
4887 tree field
= check_classfn (context
, decl
,
4889 ? current_template_parms
4891 if (field
&& field
!= error_mark_node
4892 && duplicate_decls (decl
, field
,
4893 /*newdecl_is_friend=*/false))
4897 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4898 DECL_IN_AGGR_P (decl
) = 0;
4899 /* Do not mark DECL as an explicit specialization if it was not
4900 already marked as an instantiation; a declaration should
4901 never be marked as a specialization unless we know what
4902 template is being specialized. */
4903 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4905 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4906 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4907 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4908 && DECL_DECLARED_INLINE_P (decl
));
4910 DECL_COMDAT (decl
) = false;
4912 /* [temp.expl.spec] An explicit specialization of a static data
4913 member of a template is a definition if the declaration
4914 includes an initializer; otherwise, it is a declaration.
4916 We check for processing_specialization so this only applies
4917 to the new specialization syntax. */
4918 if (!initialized
&& processing_specialization
)
4919 DECL_EXTERNAL (decl
) = 1;
4922 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4923 /* Aliases are definitions. */
4925 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4929 was_public
= TREE_PUBLIC (decl
);
4931 /* Enter this declaration into the symbol table. Don't push the plain
4932 VAR_DECL for a variable template. */
4933 if (!template_parm_scope_p ()
4935 decl
= maybe_push_decl (decl
);
4937 if (processing_template_decl
)
4938 decl
= push_template_decl (decl
);
4939 if (decl
== error_mark_node
)
4940 return error_mark_node
;
4943 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4944 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4946 /* This is a const variable with implicit 'static'. Set
4947 DECL_THIS_STATIC so we can tell it from variables that are
4948 !TREE_PUBLIC because of the anonymous namespace. */
4949 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4950 DECL_THIS_STATIC (decl
) = 1;
4953 if (current_function_decl
&& VAR_P (decl
)
4954 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4957 if (CP_DECL_THREAD_LOCAL_P (decl
))
4958 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4960 else if (TREE_STATIC (decl
))
4961 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4965 cp_function_chain
->invalid_constexpr
= true;
4968 if (!processing_template_decl
&& VAR_P (decl
))
4969 start_decl_1 (decl
, initialized
);
4974 /* Process the declaration of a variable DECL. INITIALIZED is true
4975 iff DECL is explicitly initialized. (INITIALIZED is false if the
4976 variable is initialized via an implicitly-called constructor.)
4977 This function must be called for ordinary variables (including, for
4978 example, implicit instantiations of templates), but must not be
4979 called for template declarations. */
4982 start_decl_1 (tree decl
, bool initialized
)
4986 bool aggregate_definition_p
;
4988 gcc_assert (!processing_template_decl
);
4990 if (error_operand_p (decl
))
4993 gcc_assert (VAR_P (decl
));
4995 type
= TREE_TYPE (decl
);
4996 complete_p
= COMPLETE_TYPE_P (type
);
4997 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4999 /* If an explicit initializer is present, or if this is a definition
5000 of an aggregate, then we need a complete type at this point.
5001 (Scalars are always complete types, so there is nothing to
5002 check.) This code just sets COMPLETE_P; errors (if necessary)
5003 are issued below. */
5004 if ((initialized
|| aggregate_definition_p
)
5006 && COMPLETE_TYPE_P (complete_type (type
)))
5009 /* We will not yet have set TREE_READONLY on DECL if the type
5010 was "const", but incomplete, before this point. But, now, we
5011 have a complete type, so we can try again. */
5012 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
5016 /* Is it valid for this decl to have an initializer at all? */
5018 /* Don't allow initializations for incomplete types except for
5019 arrays which might be completed by the initialization. */
5021 ; /* A complete type is ok. */
5022 else if (type_uses_auto (type
))
5023 ; /* An auto type is ok. */
5024 else if (TREE_CODE (type
) != ARRAY_TYPE
)
5026 error ("variable %q#D has initializer but incomplete type", decl
);
5027 type
= TREE_TYPE (decl
) = error_mark_node
;
5029 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
5031 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
5032 error ("elements of array %q#D have incomplete type", decl
);
5033 /* else we already gave an error in start_decl. */
5036 else if (aggregate_definition_p
&& !complete_p
)
5038 if (type_uses_auto (type
))
5039 error ("declaration of %q#D has no initializer", decl
);
5041 error ("aggregate %q#D has incomplete type and cannot be defined",
5043 /* Change the type so that assemble_variable will give
5044 DECL an rtl we can live with: (mem (const_int 0)). */
5045 type
= TREE_TYPE (decl
) = error_mark_node
;
5048 /* Create a new scope to hold this declaration if necessary.
5049 Whether or not a new scope is necessary cannot be determined
5050 until after the type has been completed; if the type is a
5051 specialization of a class template it is not until after
5052 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5053 will be set correctly. */
5054 maybe_push_cleanup_level (type
);
5057 /* Handle initialization of references. DECL, TYPE, and INIT have the
5058 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5059 but will be set to a new CLEANUP_STMT if a temporary is created
5060 that must be destroyed subsequently.
5062 Returns an initializer expression to use to initialize DECL, or
5063 NULL if the initialization can be performed statically.
5065 Quotes on semantics can be found in ARM 8.4.3. */
5068 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
5070 if (init
== NULL_TREE
)
5072 if ((DECL_LANG_SPECIFIC (decl
) == 0
5073 || DECL_IN_AGGR_P (decl
) == 0)
5074 && ! DECL_THIS_EXTERN (decl
))
5075 error ("%qD declared as reference but not initialized", decl
);
5079 if (TREE_CODE (init
) == TREE_LIST
)
5080 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5081 tf_warning_or_error
);
5083 tree ttype
= TREE_TYPE (type
);
5084 if (TREE_CODE (ttype
) != ARRAY_TYPE
5085 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
5086 /* Note: default conversion is only called in very special cases. */
5087 init
= decay_conversion (init
, tf_warning_or_error
);
5089 /* check_initializer handles this for non-reference variables, but for
5090 references we need to do it here or the initializer will get the
5091 incomplete array type and confuse later calls to
5092 cp_complete_array_type. */
5093 if (TREE_CODE (ttype
) == ARRAY_TYPE
5094 && TYPE_DOMAIN (ttype
) == NULL_TREE
5095 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
5096 || TREE_CODE (init
) == STRING_CST
))
5098 cp_complete_array_type (&ttype
, init
, false);
5099 if (ttype
!= TREE_TYPE (type
))
5100 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5103 /* Convert INIT to the reference type TYPE. This may involve the
5104 creation of a temporary, whose lifetime must be the same as that
5105 of the reference. If so, a DECL_EXPR for the temporary will be
5106 added just after the DECL_EXPR for DECL. That's why we don't set
5107 DECL_INITIAL for local references (instead assigning to them
5108 explicitly); we need to allow the temporary to be initialized
5110 return initialize_reference (type
, init
, flags
,
5111 tf_warning_or_error
);
5114 /* Designated initializers in arrays are not supported in GNU C++.
5115 The parser cannot detect this error since it does not know whether
5116 a given brace-enclosed initializer is for a class type or for an
5117 array. This function checks that CE does not use a designated
5118 initializer. If it does, an error is issued. Returns true if CE
5119 is valid, i.e., does not have a designated initializer. */
5122 check_array_designated_initializer (constructor_elt
*ce
,
5123 unsigned HOST_WIDE_INT index
)
5125 /* Designated initializers for array elements are not supported. */
5128 /* The parser only allows identifiers as designated
5130 if (ce
->index
== error_mark_node
)
5132 error ("name used in a GNU-style designated "
5133 "initializer for an array");
5136 else if (identifier_p (ce
->index
))
5138 error ("name %qD used in a GNU-style designated "
5139 "initializer for an array", ce
->index
);
5143 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5146 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5147 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5150 /* A C99 designator is OK if it matches the current index. */
5151 if (wi::eq_p (ce_index
, index
))
5154 sorry ("non-trivial designated initializers not supported");
5157 error ("C99 designator %qE is not an integral constant-expression",
5166 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5167 array until we finish parsing the initializer. If that's the
5168 situation we're in, update DECL accordingly. */
5171 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5173 tree type
= TREE_TYPE (decl
);
5175 if (TREE_CODE (type
) == ARRAY_TYPE
5176 && TYPE_DOMAIN (type
) == NULL_TREE
5177 && TREE_CODE (decl
) != TYPE_DECL
)
5179 /* do_default is really a C-ism to deal with tentative definitions.
5180 But let's leave it here to ease the eventual merge. */
5181 int do_default
= !DECL_EXTERNAL (decl
);
5182 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5185 /* Check that there are no designated initializers in INIT, as
5186 those are not supported in GNU C++, and as the middle-end
5187 will crash if presented with a non-numeric designated
5189 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5191 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5192 constructor_elt
*ce
;
5194 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5195 if (!check_array_designated_initializer (ce
, i
))
5201 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5205 error ("initializer fails to determine size of %qD", decl
);
5207 else if (failure
== 2)
5211 error ("array size missing in %qD", decl
);
5213 /* If a `static' var's size isn't known, make it extern as
5214 well as static, so it does not get allocated. If it's not
5215 `static', then don't mark it extern; finish_incomplete_decl
5216 will give it a default size and it will get allocated. */
5217 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5218 DECL_EXTERNAL (decl
) = 1;
5220 else if (failure
== 3)
5222 error ("zero-size array %qD", decl
);
5226 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5228 relayout_decl (decl
);
5232 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5233 any appropriate error messages regarding the layout. */
5236 layout_var_decl (tree decl
)
5240 type
= TREE_TYPE (decl
);
5241 if (type
== error_mark_node
)
5244 /* If we haven't already laid out this declaration, do so now.
5245 Note that we must not call complete type for an external object
5246 because it's type might involve templates that we are not
5247 supposed to instantiate yet. (And it's perfectly valid to say
5248 `extern X x' for some incomplete type `X'.) */
5249 if (!DECL_EXTERNAL (decl
))
5250 complete_type (type
);
5251 if (!DECL_SIZE (decl
)
5252 && TREE_TYPE (decl
) != error_mark_node
5253 && (COMPLETE_TYPE_P (type
)
5254 || (TREE_CODE (type
) == ARRAY_TYPE
5255 && !TYPE_DOMAIN (type
)
5256 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5257 layout_decl (decl
, 0);
5259 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5261 /* An automatic variable with an incomplete type: that is an error.
5262 Don't talk about array types here, since we took care of that
5263 message in grokdeclarator. */
5264 error ("storage size of %qD isn%'t known", decl
);
5265 TREE_TYPE (decl
) = error_mark_node
;
5268 /* Keep this code around in case we later want to control debug info
5269 based on whether a type is "used". (jason 1999-11-11) */
5271 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5272 /* Let debugger know it should output info for this type. */
5273 note_debug_info_needed (ttype
);
5275 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5276 note_debug_info_needed (DECL_CONTEXT (decl
));
5279 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5280 && DECL_SIZE (decl
) != NULL_TREE
5281 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5283 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5284 constant_expression_warning (DECL_SIZE (decl
));
5287 error ("storage size of %qD isn%'t constant", decl
);
5288 TREE_TYPE (decl
) = error_mark_node
;
5293 /* If a local static variable is declared in an inline function, or if
5294 we have a weak definition, we must endeavor to create only one
5295 instance of the variable at link-time. */
5298 maybe_commonize_var (tree decl
)
5300 /* Static data in a function with comdat linkage also has comdat
5302 if (TREE_STATIC (decl
)
5303 /* Don't mess with __FUNCTION__. */
5304 && ! DECL_ARTIFICIAL (decl
)
5305 && DECL_FUNCTION_SCOPE_P (decl
)
5306 && vague_linkage_p (DECL_CONTEXT (decl
)))
5310 /* With weak symbols, we simply make the variable COMDAT;
5311 that will cause copies in multiple translations units to
5313 comdat_linkage (decl
);
5317 if (DECL_INITIAL (decl
) == NULL_TREE
5318 || DECL_INITIAL (decl
) == error_mark_node
)
5320 /* Without weak symbols, we can use COMMON to merge
5321 uninitialized variables. */
5322 TREE_PUBLIC (decl
) = 1;
5323 DECL_COMMON (decl
) = 1;
5327 /* While for initialized variables, we must use internal
5328 linkage -- which means that multiple copies will not
5330 TREE_PUBLIC (decl
) = 0;
5331 DECL_COMMON (decl
) = 0;
5332 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5333 "sorry: semantics of inline function static "
5334 "data %q#D are wrong (you%'ll wind up "
5335 "with multiple copies)", decl
))
5336 inform (DECL_SOURCE_LOCATION (decl
),
5337 "you can work around this by removing the initializer");
5343 /* Issue an error message if DECL is an uninitialized const variable. */
5346 check_for_uninitialized_const_var (tree decl
)
5348 tree type
= strip_array_types (TREE_TYPE (decl
));
5350 /* ``Unless explicitly declared extern, a const object does not have
5351 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5354 && TREE_CODE (type
) != REFERENCE_TYPE
5355 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5356 && !DECL_INITIAL (decl
))
5358 tree field
= default_init_uninitialized_part (type
);
5362 if (CP_TYPE_CONST_P (type
))
5363 permerror (DECL_SOURCE_LOCATION (decl
),
5364 "uninitialized const %qD", decl
);
5367 error_at (DECL_SOURCE_LOCATION (decl
),
5368 "uninitialized variable %qD in %<constexpr%> function",
5370 cp_function_chain
->invalid_constexpr
= true;
5373 if (CLASS_TYPE_P (type
))
5375 tree defaulted_ctor
;
5377 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5378 "%q#T has no user-provided default constructor", type
);
5379 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5381 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5382 "constructor is not user-provided because it is "
5383 "explicitly defaulted in the class body");
5384 inform (DECL_SOURCE_LOCATION (field
),
5385 "and the implicitly-defined constructor does not "
5386 "initialize %q#D", field
);
5391 /* Structure holding the current initializer being processed by reshape_init.
5392 CUR is a pointer to the current element being processed, END is a pointer
5393 after the last element present in the initializer. */
5396 constructor_elt
*cur
;
5397 constructor_elt
*end
;
5400 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5402 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5403 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5404 initialized. If there are no more such fields, the return value
5408 next_initializable_field (tree field
)
5411 && (TREE_CODE (field
) != FIELD_DECL
5412 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5413 || DECL_ARTIFICIAL (field
)))
5414 field
= DECL_CHAIN (field
);
5419 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5420 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5421 INTEGER_CST representing the size of the array minus one (the maximum index),
5422 or NULL_TREE if the array was declared without specifying the size. D is
5423 the iterator within the constructor. */
5426 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5427 tsubst_flags_t complain
)
5430 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5431 unsigned HOST_WIDE_INT max_index_cst
= 0;
5432 unsigned HOST_WIDE_INT index
;
5434 /* The initializer for an array is always a CONSTRUCTOR. */
5435 new_init
= build_constructor (init_list_type_node
, NULL
);
5439 /* Minus 1 is used for zero sized arrays. */
5440 if (integer_all_onesp (max_index
))
5443 if (tree_fits_uhwi_p (max_index
))
5444 max_index_cst
= tree_to_uhwi (max_index
);
5445 /* sizetype is sign extended, not zero extended. */
5447 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5450 /* Loop until there are no more initializers. */
5452 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5456 constructor_elt
*old_cur
= d
->cur
;
5458 check_array_designated_initializer (d
->cur
, index
);
5459 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5461 if (elt_init
== error_mark_node
)
5462 return error_mark_node
;
5463 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5464 size_int (index
), elt_init
);
5465 if (!TREE_CONSTANT (elt_init
))
5466 TREE_CONSTANT (new_init
) = false;
5468 /* This can happen with an invalid initializer (c++/54501). */
5469 if (d
->cur
== old_cur
&& !sized_array_p
)
5476 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5477 Parameters are the same of reshape_init_r. */
5480 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5482 tree max_index
= NULL_TREE
;
5484 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5486 if (TYPE_DOMAIN (type
))
5487 max_index
= array_type_nelts (type
);
5489 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5492 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5493 Parameters are the same of reshape_init_r. */
5496 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5498 tree max_index
= NULL_TREE
;
5500 gcc_assert (VECTOR_TYPE_P (type
));
5502 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5504 tree value
= d
->cur
->value
;
5505 if (!same_type_p (TREE_TYPE (value
), type
))
5507 if (complain
& tf_error
)
5508 error ("invalid type %qT as initializer for a vector of type %qT",
5509 TREE_TYPE (d
->cur
->value
), type
);
5510 value
= error_mark_node
;
5516 /* For a vector, we initialize it as an array of the appropriate size. */
5517 if (VECTOR_TYPE_P (type
))
5518 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5520 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5523 /* Subroutine of reshape_init_r, processes the initializers for classes
5524 or union. Parameters are the same of reshape_init_r. */
5527 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5528 tsubst_flags_t complain
)
5533 gcc_assert (CLASS_TYPE_P (type
));
5535 /* The initializer for a class is always a CONSTRUCTOR. */
5536 new_init
= build_constructor (init_list_type_node
, NULL
);
5537 field
= next_initializable_field (TYPE_FIELDS (type
));
5543 An initializer for an aggregate member that is an
5544 empty class shall have the form of an empty
5545 initializer-list {}. */
5546 if (!first_initializer_p
)
5548 if (complain
& tf_error
)
5549 error ("initializer for %qT must be brace-enclosed", type
);
5550 return error_mark_node
;
5555 /* Loop through the initializable fields, gathering initializers. */
5556 while (d
->cur
!= d
->end
)
5559 constructor_elt
*old_cur
= d
->cur
;
5561 /* Handle designated initializers, as an extension. */
5564 if (d
->cur
->index
== error_mark_node
)
5565 return error_mark_node
;
5567 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5568 /* We already reshaped this. */
5569 gcc_assert (d
->cur
->index
== field
);
5570 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5571 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5574 if (complain
& tf_error
)
5575 error ("%<[%E] =%> used in a GNU-style designated initializer"
5576 " for class %qT", d
->cur
->index
, type
);
5577 return error_mark_node
;
5580 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5582 if (complain
& tf_error
)
5583 error ("%qT has no non-static data member named %qD", type
,
5585 return error_mark_node
;
5589 /* If we processed all the member of the class, we are done. */
5593 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5594 /*first_initializer_p=*/false, complain
);
5595 if (field_init
== error_mark_node
)
5596 return error_mark_node
;
5598 if (d
->cur
== old_cur
&& d
->cur
->index
)
5600 /* This can happen with an invalid initializer for a flexible
5601 array member (c++/54441). */
5602 if (complain
& tf_error
)
5603 error ("invalid initializer for %q#D", field
);
5604 return error_mark_node
;
5607 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5611 When a union is initialized with a brace-enclosed
5612 initializer, the braces shall only contain an
5613 initializer for the first member of the union. */
5614 if (TREE_CODE (type
) == UNION_TYPE
)
5617 field
= next_initializable_field (DECL_CHAIN (field
));
5623 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5624 designators are not valid; either complain or return true to indicate
5625 that reshape_init_r should return error_mark_node. */
5628 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5632 if (complain
& tf_error
)
5633 error ("C99 designator %qE outside aggregate initializer",
5641 /* Subroutine of reshape_init, which processes a single initializer (part of
5642 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5643 iterator within the CONSTRUCTOR which points to the initializer to process.
5644 FIRST_INITIALIZER_P is true if this is the first initializer of the
5645 outermost CONSTRUCTOR node. */
5648 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5649 tsubst_flags_t complain
)
5651 tree init
= d
->cur
->value
;
5653 if (error_operand_p (init
))
5654 return error_mark_node
;
5656 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5657 && has_designator_problem (d
, complain
))
5658 return error_mark_node
;
5660 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5662 /* A complex type can be initialized from one or two initializers,
5663 but braces are not elided. */
5665 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5667 if (CONSTRUCTOR_NELTS (init
) > 2)
5669 if (complain
& tf_error
)
5670 error ("too many initializers for %qT", type
);
5672 return error_mark_node
;
5675 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5677 vec
<constructor_elt
, va_gc
> *v
= 0;
5678 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5679 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5680 if (has_designator_problem (d
, complain
))
5681 return error_mark_node
;
5683 init
= build_constructor (init_list_type_node
, v
);
5688 /* A non-aggregate type is always initialized with a single
5690 if (!CP_AGGREGATE_TYPE_P (type
))
5692 /* It is invalid to initialize a non-aggregate type with a
5693 brace-enclosed initializer before C++0x.
5694 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5695 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5696 a CONSTRUCTOR (with a record type). */
5697 if (TREE_CODE (init
) == CONSTRUCTOR
5698 /* Don't complain about a capture-init. */
5699 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5700 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5702 if (SCALAR_TYPE_P (type
))
5704 if (cxx_dialect
< cxx11
5705 /* Isn't value-initialization. */
5706 || CONSTRUCTOR_NELTS (init
) > 0)
5708 if (complain
& tf_error
)
5709 error ("braces around scalar initializer for type %qT",
5711 init
= error_mark_node
;
5715 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5722 /* "If T is a class type and the initializer list has a single element of
5723 type cv U, where U is T or a class derived from T, the object is
5724 initialized from that element." Even if T is an aggregate. */
5725 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5726 && first_initializer_p
5727 && d
->end
- d
->cur
== 1
5728 && reference_related_p (type
, TREE_TYPE (init
)))
5736 All implicit type conversions (clause _conv_) are considered when
5737 initializing the aggregate member with an initializer from an
5738 initializer-list. If the initializer can initialize a member,
5739 the member is initialized. Otherwise, if the member is itself a
5740 non-empty subaggregate, brace elision is assumed and the
5741 initializer is considered for the initialization of the first
5742 member of the subaggregate. */
5743 if (TREE_CODE (init
) != CONSTRUCTOR
5744 /* But don't try this for the first initializer, since that would be
5745 looking through the outermost braces; A a2 = { a1 }; is not a
5746 valid aggregate initialization. */
5747 && !first_initializer_p
5748 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5749 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5756 /* [dcl.init.string]
5758 A char array (whether plain char, signed char, or unsigned char)
5759 can be initialized by a string-literal (optionally enclosed in
5760 braces); a wchar_t array can be initialized by a wide
5761 string-literal (optionally enclosed in braces). */
5762 if (TREE_CODE (type
) == ARRAY_TYPE
5763 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5765 tree str_init
= init
;
5767 /* Strip one level of braces if and only if they enclose a single
5768 element (as allowed by [dcl.init.string]). */
5769 if (!first_initializer_p
5770 && TREE_CODE (str_init
) == CONSTRUCTOR
5771 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5773 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5776 /* If it's a string literal, then it's the initializer for the array
5777 as a whole. Otherwise, continue with normal initialization for
5778 array types (one value per array element). */
5779 if (TREE_CODE (str_init
) == STRING_CST
)
5781 if (has_designator_problem (d
, complain
))
5782 return error_mark_node
;
5788 /* The following cases are about aggregates. If we are not within a full
5789 initializer already, and there is not a CONSTRUCTOR, it means that there
5790 is a missing set of braces (that is, we are processing the case for
5791 which reshape_init exists). */
5792 if (!first_initializer_p
)
5794 if (TREE_CODE (init
) == CONSTRUCTOR
)
5796 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5797 /* There is no need to reshape pointer-to-member function
5798 initializers, as they are always constructed correctly
5799 by the front end. */
5801 else if (COMPOUND_LITERAL_P (init
))
5802 /* For a nested compound literal, there is no need to reshape since
5803 brace elision is not allowed. Even if we decided to allow it,
5804 we should add a call to reshape_init in finish_compound_literal,
5805 before calling digest_init, so changing this code would still
5806 not be necessary. */
5807 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5811 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5812 return reshape_init (type
, init
, complain
);
5816 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5820 /* Dispatch to specialized routines. */
5821 if (CLASS_TYPE_P (type
))
5822 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5823 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5824 return reshape_init_array (type
, d
, complain
);
5825 else if (VECTOR_TYPE_P (type
))
5826 return reshape_init_vector (type
, d
, complain
);
5831 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5832 brace-enclosed aggregate initializer.
5834 INIT is the CONSTRUCTOR containing the list of initializers describing
5835 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5836 It may not presently match the shape of the TYPE; for example:
5838 struct S { int a; int b; };
5839 struct S a[] = { 1, 2, 3, 4 };
5841 Here INIT will hold a vector of four elements, rather than a
5842 vector of two elements, each itself a vector of two elements. This
5843 routine transforms INIT from the former form into the latter. The
5844 revised CONSTRUCTOR node is returned. */
5847 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5849 vec
<constructor_elt
, va_gc
> *v
;
5853 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5855 v
= CONSTRUCTOR_ELTS (init
);
5857 /* An empty constructor does not need reshaping, and it is always a valid
5859 if (vec_safe_is_empty (v
))
5862 /* Recurse on this CONSTRUCTOR. */
5864 d
.end
= d
.cur
+ v
->length ();
5866 new_init
= reshape_init_r (type
, &d
, true, complain
);
5867 if (new_init
== error_mark_node
)
5868 return error_mark_node
;
5870 /* Make sure all the element of the constructor were used. Otherwise,
5871 issue an error about exceeding initializers. */
5874 if (complain
& tf_error
)
5875 error ("too many initializers for %qT", type
);
5877 return error_mark_node
;
5883 /* Verify array initializer. Returns true if errors have been reported. */
5886 check_array_initializer (tree decl
, tree type
, tree init
)
5888 tree element_type
= TREE_TYPE (type
);
5890 /* The array type itself need not be complete, because the
5891 initializer may tell us how many elements are in the array.
5892 But, the elements of the array must be complete. */
5893 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5896 error ("elements of array %q#D have incomplete type", decl
);
5898 error ("elements of array %q#T have incomplete type", type
);
5901 /* A compound literal can't have variable size. */
5903 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5904 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5906 error ("variable-sized compound literal");
5912 /* Subroutine of check_initializer; args are passed down from that function.
5913 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5916 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5919 gcc_assert (stmts_are_full_exprs_p ());
5920 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5923 /* Verify INIT (the initializer for DECL), and record the
5924 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5925 grok_reference_init.
5927 If the return value is non-NULL, it is an expression that must be
5928 evaluated dynamically to initialize DECL. */
5931 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5933 tree type
= TREE_TYPE (decl
);
5934 tree init_code
= NULL
;
5937 /* Things that are going to be initialized need to have complete
5939 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5941 if (DECL_HAS_VALUE_EXPR_P (decl
))
5943 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5944 it doesn't have storage to be initialized. */
5945 gcc_assert (init
== NULL_TREE
);
5949 if (type
== error_mark_node
)
5950 /* We will have already complained. */
5953 if (TREE_CODE (type
) == ARRAY_TYPE
)
5955 if (check_array_initializer (decl
, type
, init
))
5958 else if (!COMPLETE_TYPE_P (type
))
5960 error ("%q#D has incomplete type", decl
);
5961 TREE_TYPE (decl
) = error_mark_node
;
5965 /* There is no way to make a variable-sized class type in GNU C++. */
5966 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5968 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5970 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5971 if (SCALAR_TYPE_P (type
))
5975 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5976 init
= build_zero_init (type
, NULL_TREE
, false);
5978 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5980 error ("scalar object %qD requires one element in initializer",
5982 TREE_TYPE (decl
) = error_mark_node
;
5988 if (TREE_CODE (decl
) == CONST_DECL
)
5990 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5992 DECL_INITIAL (decl
) = init
;
5994 gcc_assert (init
!= NULL_TREE
);
5997 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5999 else if (init
|| type_build_ctor_call (type
)
6000 || TREE_CODE (type
) == REFERENCE_TYPE
)
6002 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6004 init
= grok_reference_init (decl
, type
, init
, flags
);
6005 flags
|= LOOKUP_ALREADY_DIGESTED
;
6008 check_for_uninitialized_const_var (decl
);
6009 /* Do not reshape constructors of vectors (they don't need to be
6011 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
6013 if (is_std_init_list (type
))
6015 init
= perform_implicit_conversion (type
, init
,
6016 tf_warning_or_error
);
6017 flags
|= LOOKUP_ALREADY_DIGESTED
;
6019 else if (TYPE_NON_AGGREGATE_CLASS (type
))
6021 /* Don't reshape if the class has constructors. */
6022 if (cxx_dialect
== cxx98
)
6023 error ("in C++98 %qD must be initialized by constructor, "
6027 else if (VECTOR_TYPE_P (type
) && TYPE_VECTOR_OPAQUE (type
))
6029 error ("opaque vector types cannot be initialized");
6030 init
= error_mark_node
;
6034 init
= reshape_init (type
, init
, tf_warning_or_error
);
6035 flags
|= LOOKUP_NO_NARROWING
;
6038 else if (TREE_CODE (init
) == TREE_LIST
6039 && TREE_TYPE (init
) != unknown_type_node
6040 && !MAYBE_CLASS_TYPE_P (type
))
6042 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6044 /* We get here with code like `int a (2);' */
6045 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6046 tf_warning_or_error
);
6049 /* If DECL has an array type without a specific bound, deduce the
6050 array size from the initializer. */
6051 maybe_deduce_size_from_array_init (decl
, init
);
6052 type
= TREE_TYPE (decl
);
6053 if (type
== error_mark_node
)
6056 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
6057 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
6058 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
6059 && CP_AGGREGATE_TYPE_P (type
)
6060 && (CLASS_TYPE_P (type
)
6061 || !TYPE_NEEDS_CONSTRUCTING (type
)
6062 || type_has_extended_temps (type
))))
6064 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
6066 /* A constructor call is a non-trivial initializer even if
6067 it isn't explicitly written. */
6068 if (TREE_SIDE_EFFECTS (init_code
))
6069 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
6071 /* If this is a constexpr initializer, expand_default_init will
6072 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6073 case, pull the initializer back out and pass it down into
6074 store_init_value. */
6075 while (TREE_CODE (init_code
) == EXPR_STMT
6076 || TREE_CODE (init_code
) == CONVERT_EXPR
)
6077 init_code
= TREE_OPERAND (init_code
, 0);
6078 if (TREE_CODE (init_code
) == INIT_EXPR
)
6080 init
= TREE_OPERAND (init_code
, 1);
6081 init_code
= NULL_TREE
;
6082 /* Don't call digest_init; it's unnecessary and will complain
6083 about aggregate initialization of non-aggregate classes. */
6084 flags
|= LOOKUP_ALREADY_DIGESTED
;
6086 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
6088 /* Declared constexpr, but no suitable initializer; massage
6089 init appropriately so we can pass it into store_init_value
6091 if (CLASS_TYPE_P (type
)
6092 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
6094 init
= build_functional_cast (type
, init
, tf_none
);
6095 if (TREE_CODE (init
) == TARGET_EXPR
)
6096 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
6098 init_code
= NULL_TREE
;
6104 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6106 /* In aggregate initialization of a variable, each element
6107 initialization is a full-expression because there is no
6108 enclosing expression. */
6109 gcc_assert (stmts_are_full_exprs_p ());
6111 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6113 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6114 && DECL_INITIAL (decl
)
6115 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6116 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6117 warning (0, "array %qD initialized by parenthesized string literal %qE",
6118 decl
, DECL_INITIAL (decl
));
6124 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6125 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6126 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6127 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6130 check_for_uninitialized_const_var (decl
);
6133 if (init
&& init
!= error_mark_node
)
6134 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6138 /* We might have set these in cp_finish_decl. */
6139 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6140 TREE_CONSTANT (decl
) = false;
6143 if (init_code
&& DECL_IN_AGGR_P (decl
))
6145 static int explained
= 0;
6147 if (cxx_dialect
< cxx11
)
6148 error ("initializer invalid for static member with constructor");
6150 error ("non-constant in-class initialization invalid for static "
6151 "member %qD", decl
);
6154 inform (input_location
,
6155 "(an out of class initialization is required)");
6164 /* If DECL is not a local variable, give it RTL. */
6167 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6169 int toplev
= toplevel_bindings_p ();
6172 /* Set the DECL_ASSEMBLER_NAME for the object. */
6175 /* The `register' keyword, when used together with an
6176 asm-specification, indicates that the variable should be
6177 placed in a particular register. */
6178 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6180 set_user_assembler_name (decl
, asmspec
);
6181 DECL_HARD_REGISTER (decl
) = 1;
6185 if (TREE_CODE (decl
) == FUNCTION_DECL
6186 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6187 set_builtin_user_assembler_name (decl
, asmspec
);
6188 set_user_assembler_name (decl
, asmspec
);
6192 /* Handle non-variables up front. */
6195 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6199 /* If we see a class member here, it should be a static data
6201 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6203 gcc_assert (TREE_STATIC (decl
));
6204 /* An in-class declaration of a static data member should be
6205 external; it is only a declaration, and not a definition. */
6206 if (init
== NULL_TREE
)
6207 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6210 /* We don't create any RTL for local variables. */
6211 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6214 /* We defer emission of local statics until the corresponding
6215 DECL_EXPR is expanded. */
6216 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6218 /* Defer template instantiations. */
6219 if (DECL_LANG_SPECIFIC (decl
)
6220 && DECL_IMPLICIT_INSTANTIATION (decl
))
6223 /* If we're not deferring, go ahead and assemble the variable. */
6225 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6228 /* walk_tree helper for wrap_temporary_cleanups, below. */
6231 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6233 /* Stop at types or full-expression boundaries. */
6234 if (TYPE_P (*stmt_p
)
6235 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6241 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6243 tree guard
= (tree
)data
;
6244 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6246 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6247 /* Tell honor_protect_cleanup_actions to handle this as a separate
6249 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6251 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6257 /* We're initializing a local variable which has a cleanup GUARD. If there
6258 are any temporaries used in the initializer INIT of this variable, we
6259 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6260 variable will be cleaned up properly if one of them throws.
6262 Unfortunately, there's no way to express this properly in terms of
6263 nesting, as the regions for the temporaries overlap the region for the
6264 variable itself; if there are two temporaries, the variable needs to be
6265 the first thing destroyed if either of them throws. However, we only
6266 want to run the variable's cleanup if it actually got constructed. So
6267 we need to guard the temporary cleanups with the variable's cleanup if
6268 they are run on the normal path, but not if they are run on the
6269 exceptional path. We implement this by telling
6270 honor_protect_cleanup_actions to strip the variable cleanup from the
6271 exceptional path. */
6274 wrap_temporary_cleanups (tree init
, tree guard
)
6276 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6279 /* Generate code to initialize DECL (a local variable). */
6282 initialize_local_var (tree decl
, tree init
)
6284 tree type
= TREE_TYPE (decl
);
6288 gcc_assert (VAR_P (decl
)
6289 || TREE_CODE (decl
) == RESULT_DECL
);
6290 gcc_assert (!TREE_STATIC (decl
));
6292 if (DECL_SIZE (decl
) == NULL_TREE
)
6294 /* If we used it already as memory, it must stay in memory. */
6295 DECL_INITIAL (decl
) = NULL_TREE
;
6296 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6300 if (type
== error_mark_node
)
6303 /* Compute and store the initial value. */
6304 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6305 if (TREE_USED (type
))
6306 DECL_READ_P (decl
) = 1;
6308 /* Generate a cleanup, if necessary. */
6309 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6311 /* Perform the initialization. */
6314 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6315 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6316 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6318 /* Stick simple initializers in DECL_INITIAL so that
6319 -Wno-init-self works (c++/34772). */
6320 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6321 DECL_INITIAL (decl
) = rinit
;
6323 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6327 warning_at (DECL_SOURCE_LOCATION (decl
),
6329 "reference %qD is initialized with itself", decl
);
6334 int saved_stmts_are_full_exprs_p
;
6336 /* If we're only initializing a single object, guard the
6337 destructors of any temporaries used in its initializer with
6338 its destructor. This isn't right for arrays because each
6339 element initialization is a full-expression. */
6340 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6341 wrap_temporary_cleanups (init
, cleanup
);
6343 gcc_assert (building_stmt_list_p ());
6344 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6345 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6346 finish_expr_stmt (init
);
6347 current_stmt_tree ()->stmts_are_full_exprs_p
=
6348 saved_stmts_are_full_exprs_p
;
6352 /* Set this to 0 so we can tell whether an aggregate which was
6353 initialized was ever used. Don't do this if it has a
6354 destructor, so we don't complain about the 'resource
6355 allocation is initialization' idiom. Now set
6356 attribute((unused)) on types so decls of that type will be
6357 marked used. (see TREE_USED, above.) */
6358 if (TYPE_NEEDS_CONSTRUCTING (type
)
6360 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6361 && DECL_NAME (decl
))
6362 TREE_USED (decl
) = 0;
6363 else if (already_used
)
6364 TREE_USED (decl
) = 1;
6367 finish_decl_cleanup (decl
, cleanup
);
6370 /* DECL is a VAR_DECL for a compiler-generated variable with static
6371 storage duration (like a virtual table) whose initializer is a
6372 compile-time constant. Initialize the variable and provide it to the
6376 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6379 gcc_assert (DECL_ARTIFICIAL (decl
));
6380 init
= build_constructor (TREE_TYPE (decl
), v
);
6381 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6382 DECL_INITIAL (decl
) = init
;
6383 DECL_INITIALIZED_P (decl
) = 1;
6384 determine_visibility (decl
);
6385 layout_var_decl (decl
);
6386 maybe_commonize_var (decl
);
6387 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6390 /* INIT is the initializer for a variable, as represented by the
6391 parser. Returns true iff INIT is type-dependent. */
6394 type_dependent_init_p (tree init
)
6396 if (TREE_CODE (init
) == TREE_LIST
)
6397 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6398 return any_type_dependent_elements_p (init
);
6399 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6400 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6402 vec
<constructor_elt
, va_gc
> *elts
;
6406 elts
= CONSTRUCTOR_ELTS (init
);
6407 nelts
= vec_safe_length (elts
);
6408 for (i
= 0; i
< nelts
; ++i
)
6409 if (type_dependent_init_p ((*elts
)[i
].value
))
6413 /* It must be a simple expression, e.g., int i = 3; */
6414 return type_dependent_expression_p (init
);
6419 /* INIT is the initializer for a variable, as represented by the
6420 parser. Returns true iff INIT is value-dependent. */
6423 value_dependent_init_p (tree init
)
6425 if (TREE_CODE (init
) == TREE_LIST
)
6426 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6427 return any_value_dependent_elements_p (init
);
6428 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6429 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6431 vec
<constructor_elt
, va_gc
> *elts
;
6435 elts
= CONSTRUCTOR_ELTS (init
);
6436 nelts
= vec_safe_length (elts
);
6437 for (i
= 0; i
< nelts
; ++i
)
6438 if (value_dependent_init_p ((*elts
)[i
].value
))
6442 /* It must be a simple expression, e.g., int i = 3; */
6443 return value_dependent_expression_p (init
);
6448 // Returns true if a DECL is VAR_DECL with the concept specifier.
6450 is_concept_var (tree decl
)
6452 return (VAR_P (decl
)
6453 // Not all variables have DECL_LANG_SPECIFIC.
6454 && DECL_LANG_SPECIFIC (decl
)
6455 && DECL_DECLARED_CONCEPT_P (decl
));
6458 /* Finish processing of a declaration;
6459 install its line number and initial value.
6460 If the length of an array type is not known before,
6461 it must be determined now, from the initial value, or it is an error.
6463 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6464 true, then INIT is an integral constant expression.
6466 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6467 if the (init) syntax was used. */
6470 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6471 tree asmspec_tree
, int flags
)
6474 vec
<tree
, va_gc
> *cleanups
= NULL
;
6475 const char *asmspec
= NULL
;
6476 int was_readonly
= 0;
6477 bool var_definition_p
= false;
6480 if (decl
== error_mark_node
)
6485 error ("assignment (not initialization) in declaration");
6489 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6490 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6491 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6493 type
= TREE_TYPE (decl
);
6494 if (type
== error_mark_node
)
6497 /* If a name was specified, get the string. */
6498 if (at_namespace_scope_p ())
6499 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6500 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6501 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6503 if (current_class_type
6504 && CP_DECL_CONTEXT (decl
) == current_class_type
6505 && TYPE_BEING_DEFINED (current_class_type
)
6506 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6507 && (DECL_INITIAL (decl
) || init
))
6508 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6510 if (TREE_CODE (decl
) != FUNCTION_DECL
6511 && (auto_node
= type_uses_auto (type
)))
6514 if (init
== NULL_TREE
)
6516 if (DECL_LANG_SPECIFIC (decl
)
6517 && DECL_TEMPLATE_INSTANTIATION (decl
)
6518 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6520 /* init is null because we're deferring instantiating the
6521 initializer until we need it. Well, we need it now. */
6522 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6526 error ("declaration of %q#D has no initializer", decl
);
6527 TREE_TYPE (decl
) = error_mark_node
;
6531 if (TREE_CODE (d_init
) == TREE_LIST
)
6532 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6533 tf_warning_or_error
);
6534 d_init
= resolve_nondeduced_context (d_init
);
6535 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6537 tf_warning_or_error
,
6539 if (type
== error_mark_node
)
6541 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6544 if (!ensure_literal_type_for_constexpr_object (decl
))
6545 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6548 && DECL_CLASS_SCOPE_P (decl
)
6549 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6550 check_static_variable_definition (decl
, type
);
6552 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6555 if (init
== ridpointers
[(int)RID_DELETE
])
6557 /* FIXME check this is 1st decl. */
6558 DECL_DELETED_FN (decl
) = 1;
6559 DECL_DECLARED_INLINE_P (decl
) = 1;
6560 DECL_INITIAL (decl
) = error_mark_node
;
6561 FOR_EACH_CLONE (clone
, decl
)
6563 DECL_DELETED_FN (clone
) = 1;
6564 DECL_DECLARED_INLINE_P (clone
) = 1;
6565 DECL_INITIAL (clone
) = error_mark_node
;
6569 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6571 if (defaultable_fn_check (decl
))
6572 DECL_DEFAULTED_FN (decl
) = 1;
6574 DECL_INITIAL (decl
) = NULL_TREE
;
6578 if (init
&& VAR_P (decl
))
6580 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6581 /* If DECL is a reference, then we want to know whether init is a
6582 reference constant; init_const_expr_p as passed tells us whether
6583 it's an rvalue constant. */
6584 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6585 init_const_expr_p
= potential_constant_expression (init
);
6586 if (init_const_expr_p
)
6588 /* Set these flags now for templates. We'll update the flags in
6589 store_init_value for instantiations. */
6590 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6591 if (decl_maybe_constant_var_p (decl
))
6592 TREE_CONSTANT (decl
) = 1;
6596 if (processing_template_decl
)
6598 bool type_dependent_p
;
6600 /* Add this declaration to the statement-tree. */
6601 if (at_function_scope_p ())
6602 add_decl_expr (decl
);
6604 type_dependent_p
= dependent_type_p (type
);
6606 if (check_for_bare_parameter_packs (init
))
6609 DECL_INITIAL (decl
) = NULL_TREE
;
6612 /* Generally, initializers in templates are expanded when the
6613 template is instantiated. But, if DECL is a variable constant
6614 then it can be used in future constant expressions, so its value
6615 must be available. */
6617 if (!VAR_P (decl
) || type_dependent_p
)
6618 /* We can't do anything if the decl has dependent type. */;
6620 && init_const_expr_p
6621 && TREE_CODE (type
) != REFERENCE_TYPE
6622 && decl_maybe_constant_var_p (decl
)
6623 && !type_dependent_init_p (init
)
6624 && !value_dependent_init_p (init
))
6626 /* This variable seems to be a non-dependent constant, so process
6627 its initializer. If check_initializer returns non-null the
6628 initialization wasn't constant after all. */
6630 cleanups
= make_tree_vector ();
6631 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6632 if (init_code
== NULL_TREE
)
6634 release_tree_vector (cleanups
);
6636 else if (!init
&& is_concept_var (decl
))
6637 error ("variable concept has no initializer");
6638 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6640 /* Deduce array size even if the initializer is dependent. */
6641 maybe_deduce_size_from_array_init (decl
, init
);
6642 /* And complain about multiple initializers. */
6643 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6644 && !MAYBE_CLASS_TYPE_P (type
))
6645 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6646 tf_warning_or_error
);
6650 DECL_INITIAL (decl
) = init
;
6654 /* Just store non-static data member initializers for later. */
6655 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6656 DECL_INITIAL (decl
) = init
;
6658 /* Take care of TYPE_DECLs up front. */
6659 if (TREE_CODE (decl
) == TYPE_DECL
)
6661 if (type
!= error_mark_node
6662 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6664 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6665 warning (0, "shadowing previous type declaration of %q#D", decl
);
6666 set_identifier_type_value (DECL_NAME (decl
), decl
);
6669 /* If we have installed this as the canonical typedef for this
6670 type, and that type has not been defined yet, delay emitting
6671 the debug information for it, as we will emit it later. */
6672 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6673 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6674 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6676 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6681 /* A reference will be modified here, as it is initialized. */
6682 if (! DECL_EXTERNAL (decl
)
6683 && TREE_READONLY (decl
)
6684 && TREE_CODE (type
) == REFERENCE_TYPE
)
6687 TREE_READONLY (decl
) = 0;
6692 /* If this is a local variable that will need a mangled name,
6693 register it now. We must do this before processing the
6694 initializer for the variable, since the initialization might
6695 require a guard variable, and since the mangled name of the
6696 guard variable will depend on the mangled name of this
6698 if (DECL_FUNCTION_SCOPE_P (decl
)
6699 && TREE_STATIC (decl
)
6700 && !DECL_ARTIFICIAL (decl
))
6702 push_local_name (decl
);
6703 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6704 || DECL_DESTRUCTOR_P (current_function_decl
))
6705 /* Normally local_decls is populated during GIMPLE lowering,
6706 but [cd]tors are never actually compiled directly. We need
6707 to put statics on the list so we can deal with the label
6708 address extension. FIXME. */
6709 add_local_decl (cfun
, decl
);
6710 /* And make sure it's in the symbol table for
6711 c_parse_final_cleanups to find. */
6712 varpool_node::get_create (decl
);
6715 /* Convert the initializer to the type of DECL, if we have not
6716 already initialized DECL. */
6717 if (!DECL_INITIALIZED_P (decl
)
6718 /* If !DECL_EXTERNAL then DECL is being defined. In the
6719 case of a static data member initialized inside the
6720 class-specifier, there can be an initializer even if DECL
6721 is *not* defined. */
6722 && (!DECL_EXTERNAL (decl
) || init
))
6724 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6727 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6728 /* Allow libjava/prims.cc define primitive classes. */
6729 if (init
!= NULL_TREE
6730 || jclass
== NULL_TREE
6731 || TREE_CODE (jclass
) != TYPE_DECL
6732 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6733 || !same_type_ignoring_top_level_qualifiers_p
6734 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6735 error ("Java object %qD not allocated with %<new%>", decl
);
6738 cleanups
= make_tree_vector ();
6739 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6745 The memory occupied by any object of static storage
6746 duration is zero-initialized at program startup before
6747 any other initialization takes place.
6749 We cannot create an appropriate initializer until after
6750 the type of DECL is finalized. If DECL_INITIAL is set,
6751 then the DECL is statically initialized, and any
6752 necessary zero-initialization has already been performed. */
6753 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6754 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6755 /*nelts=*/NULL_TREE
,
6756 /*static_storage_p=*/true);
6757 /* Remember that the initialization for this variable has
6759 DECL_INITIALIZED_P (decl
) = 1;
6760 /* This declaration is the definition of this variable,
6761 unless we are initializing a static data member within
6762 the class specifier. */
6763 if (!DECL_EXTERNAL (decl
))
6764 var_definition_p
= true;
6766 /* If the variable has an array type, lay out the type, even if
6767 there is no initializer. It is valid to index through the
6768 array, and we must get TYPE_ALIGN set correctly on the array
6770 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6773 if (TREE_STATIC (decl
)
6774 && !at_function_scope_p ()
6775 && current_function_decl
== NULL
)
6776 /* So decl is a global variable or a static member of a
6777 non local class. Record the types it uses
6778 so that we can decide later to emit debug info for them. */
6779 record_types_used_by_current_var_decl (decl
);
6781 else if (TREE_CODE (decl
) == FIELD_DECL
6782 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6783 error ("non-static data member %qD has Java class type", decl
);
6785 /* Add this declaration to the statement-tree. This needs to happen
6786 after the call to check_initializer so that the DECL_EXPR for a
6787 reference temp is added before the DECL_EXPR for the reference itself. */
6788 if (DECL_FUNCTION_SCOPE_P (decl
))
6790 /* If we're building a variable sized type, and we might be
6791 reachable other than via the top of the current binding
6792 level, then create a new BIND_EXPR so that we deallocate
6793 the object at the right time. */
6796 && !TREE_CONSTANT (DECL_SIZE (decl
))
6797 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6800 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6801 TREE_SIDE_EFFECTS (bind
) = 1;
6803 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6805 add_decl_expr (decl
);
6808 /* Let the middle end know about variables and functions -- but not
6809 static data members in uninstantiated class templates. */
6810 if (VAR_OR_FUNCTION_DECL_P (decl
))
6814 layout_var_decl (decl
);
6815 maybe_commonize_var (decl
);
6818 /* This needs to happen after the linkage is set. */
6819 determine_visibility (decl
);
6821 if (var_definition_p
&& TREE_STATIC (decl
))
6823 /* If a TREE_READONLY variable needs initialization
6824 at runtime, it is no longer readonly and we need to
6825 avoid MEM_READONLY_P being set on RTL created for it. */
6828 if (TREE_READONLY (decl
))
6829 TREE_READONLY (decl
) = 0;
6832 else if (was_readonly
)
6833 TREE_READONLY (decl
) = 1;
6835 /* Likewise if it needs destruction. */
6836 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6837 TREE_READONLY (decl
) = 0;
6840 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6842 /* Check for abstractness of the type. Notice that there is no
6843 need to strip array types here since the check for those types
6844 is already done within create_array_type_for_decl. */
6845 abstract_virtuals_error (decl
, type
);
6847 if (TREE_TYPE (decl
) == error_mark_node
)
6848 /* No initialization required. */
6850 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6854 if (init
== ridpointers
[(int)RID_DEFAULT
])
6856 /* An out-of-class default definition is defined at
6857 the point where it is explicitly defaulted. */
6858 if (DECL_DELETED_FN (decl
))
6859 maybe_explain_implicit_delete (decl
);
6860 else if (DECL_INITIAL (decl
) == error_mark_node
)
6861 synthesize_method (decl
);
6864 error ("function %q#D is initialized like a variable", decl
);
6866 /* else no initialization required. */
6868 else if (DECL_EXTERNAL (decl
)
6869 && ! (DECL_LANG_SPECIFIC (decl
)
6870 && DECL_NOT_REALLY_EXTERN (decl
)))
6873 DECL_INITIAL (decl
) = init
;
6875 /* A variable definition. */
6876 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6877 /* Initialize the local variable. */
6878 initialize_local_var (decl
, init
);
6880 /* If a variable is defined, and then a subsequent
6881 definition with external linkage is encountered, we will
6882 get here twice for the same variable. We want to avoid
6883 calling expand_static_init more than once. For variables
6884 that are not static data members, we can call
6885 expand_static_init only when we actually process the
6886 initializer. It is not legal to redeclare a static data
6887 member, so this issue does not arise in that case. */
6888 else if (var_definition_p
&& TREE_STATIC (decl
))
6889 expand_static_init (decl
, init
);
6892 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6893 reference, insert it in the statement-tree now. */
6897 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6898 push_cleanup (decl
, t
, false);
6899 release_tree_vector (cleanups
);
6903 TREE_READONLY (decl
) = 1;
6905 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6908 /* Returns a declaration for a VAR_DECL as if:
6910 extern "C" TYPE NAME;
6912 had been seen. Used to create compiler-generated global
6916 declare_global_var (tree name
, tree type
)
6920 push_to_top_level ();
6921 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6922 TREE_PUBLIC (decl
) = 1;
6923 DECL_EXTERNAL (decl
) = 1;
6924 DECL_ARTIFICIAL (decl
) = 1;
6925 /* If the user has explicitly declared this variable (perhaps
6926 because the code we are compiling is part of a low-level runtime
6927 library), then it is possible that our declaration will be merged
6928 with theirs by pushdecl. */
6929 decl
= pushdecl (decl
);
6930 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6931 pop_from_top_level ();
6936 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6937 if "__cxa_atexit" is not being used) corresponding to the function
6938 to be called when the program exits. */
6941 get_atexit_fn_ptr_type (void)
6945 if (!atexit_fn_ptr_type_node
)
6948 if (flag_use_cxa_atexit
6949 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6950 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6951 arg_type
= ptr_type_node
;
6953 /* The parameter to "atexit" is "void (*)(void)". */
6954 arg_type
= NULL_TREE
;
6956 fn_type
= build_function_type_list (void_type_node
,
6957 arg_type
, NULL_TREE
);
6958 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6961 return atexit_fn_ptr_type_node
;
6964 /* Returns a pointer to the `atexit' function. Note that if
6965 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6966 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6969 get_atexit_node (void)
6975 bool use_aeabi_atexit
;
6980 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6982 /* The declaration for `__cxa_atexit' is:
6984 int __cxa_atexit (void (*)(void *), void *, void *)
6986 We build up the argument types and then the function type
6988 tree argtype0
, argtype1
, argtype2
;
6990 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6991 /* First, build the pointer-to-function type for the first
6993 fn_ptr_type
= get_atexit_fn_ptr_type ();
6994 /* Then, build the rest of the argument types. */
6995 argtype2
= ptr_type_node
;
6996 if (use_aeabi_atexit
)
6998 argtype1
= fn_ptr_type
;
6999 argtype0
= ptr_type_node
;
7003 argtype1
= ptr_type_node
;
7004 argtype0
= fn_ptr_type
;
7006 /* And the final __cxa_atexit type. */
7007 fn_type
= build_function_type_list (integer_type_node
,
7008 argtype0
, argtype1
, argtype2
,
7010 if (use_aeabi_atexit
)
7011 name
= "__aeabi_atexit";
7013 name
= "__cxa_atexit";
7017 /* The declaration for `atexit' is:
7019 int atexit (void (*)());
7021 We build up the argument types and then the function type
7023 fn_ptr_type
= get_atexit_fn_ptr_type ();
7024 /* Build the final atexit type. */
7025 fn_type
= build_function_type_list (integer_type_node
,
7026 fn_ptr_type
, NULL_TREE
);
7030 /* Now, build the function declaration. */
7031 push_lang_context (lang_name_c
);
7032 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
7033 mark_used (atexit_fndecl
);
7034 pop_lang_context ();
7035 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
7040 /* Like get_atexit_node, but for thread-local cleanups. */
7043 get_thread_atexit_node (void)
7045 /* The declaration for `__cxa_thread_atexit' is:
7047 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7048 tree fn_type
= build_function_type_list (integer_type_node
,
7049 get_atexit_fn_ptr_type (),
7050 ptr_type_node
, ptr_type_node
,
7053 /* Now, build the function declaration. */
7054 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
7055 ECF_LEAF
| ECF_NOTHROW
);
7056 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
7059 /* Returns the __dso_handle VAR_DECL. */
7062 get_dso_handle_node (void)
7064 if (dso_handle_node
)
7065 return dso_handle_node
;
7067 /* Declare the variable. */
7068 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
7071 #ifdef HAVE_GAS_HIDDEN
7072 if (dso_handle_node
!= error_mark_node
)
7074 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
7075 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
7079 return dso_handle_node
;
7082 /* Begin a new function with internal linkage whose job will be simply
7083 to destroy some particular variable. */
7085 static GTY(()) int start_cleanup_cnt
;
7088 start_cleanup_fn (void)
7093 bool use_cxa_atexit
= flag_use_cxa_atexit
7094 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
7096 push_to_top_level ();
7098 /* No need to mangle this. */
7099 push_lang_context (lang_name_c
);
7101 /* Build the name of the function. */
7102 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
7103 /* Build the function declaration. */
7104 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
7105 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
7106 /* It's a function with internal linkage, generated by the
7108 TREE_PUBLIC (fndecl
) = 0;
7109 DECL_ARTIFICIAL (fndecl
) = 1;
7110 /* Make the function `inline' so that it is only emitted if it is
7111 actually needed. It is unlikely that it will be inlined, since
7112 it is only called via a function pointer, but we avoid unnecessary
7113 emissions this way. */
7114 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7115 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7116 /* Build the parameter. */
7121 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7122 DECL_CONTEXT (parmdecl
) = fndecl
;
7123 TREE_USED (parmdecl
) = 1;
7124 DECL_READ_P (parmdecl
) = 1;
7125 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7129 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7131 pop_lang_context ();
7133 return current_function_decl
;
7136 /* Finish the cleanup function begun by start_cleanup_fn. */
7139 end_cleanup_fn (void)
7141 expand_or_defer_fn (finish_function (0));
7143 pop_from_top_level ();
7146 /* Generate code to handle the destruction of DECL, an object with
7147 static storage duration. */
7150 register_dtor_fn (tree decl
)
7157 bool ob_parm
, dso_parm
, use_dtor
;
7158 tree arg0
, arg1
, arg2
;
7161 type
= TREE_TYPE (decl
);
7162 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7165 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7166 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7167 destructor to "__cxa_atexit"; we don't have to build a temporary
7168 function to do the cleanup. */
7169 dso_parm
= (flag_use_cxa_atexit
7170 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7171 ob_parm
= (CP_DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7172 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7177 /* Find the destructor. */
7178 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7179 gcc_assert (idx
>= 0);
7180 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7181 /* Make sure it is accessible. */
7182 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7183 tf_warning_or_error
);
7187 /* Call build_cleanup before we enter the anonymous function so
7188 that any access checks will be done relative to the current
7189 scope, rather than the scope of the anonymous function. */
7190 build_cleanup (decl
);
7192 /* Now start the function. */
7193 cleanup
= start_cleanup_fn ();
7195 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7196 to the original function, rather than the anonymous one. That
7197 will make the back end think that nested functions are in use,
7198 which causes confusion. */
7199 push_deferring_access_checks (dk_no_check
);
7200 fcall
= build_cleanup (decl
);
7201 pop_deferring_access_checks ();
7203 /* Create the body of the anonymous function. */
7204 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7205 finish_expr_stmt (fcall
);
7206 finish_compound_stmt (compound_stmt
);
7210 /* Call atexit with the cleanup function. */
7211 mark_used (cleanup
);
7212 cleanup
= build_address (cleanup
);
7214 if (CP_DECL_THREAD_LOCAL_P (decl
))
7215 atex_node
= get_thread_atexit_node ();
7217 atex_node
= get_atexit_node ();
7221 /* We must convert CLEANUP to the type that "__cxa_atexit"
7223 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7224 /* "__cxa_atexit" will pass the address of DECL to the
7225 cleanup function. */
7227 addr
= build_address (decl
);
7228 /* The declared type of the parameter to "__cxa_atexit" is
7229 "void *". For plain "T*", we could just let the
7230 machinery in cp_build_function_call convert it -- but if the
7231 type is "cv-qualified T *", then we need to convert it
7232 before passing it in, to avoid spurious errors. */
7233 addr
= build_nop (ptr_type_node
, addr
);
7236 /* Since the cleanup functions we build ignore the address
7237 they're given, there's no reason to pass the actual address
7238 in, and, in general, it's cheaper to pass NULL than any
7240 addr
= null_pointer_node
;
7243 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7244 tf_warning_or_error
);
7246 /* Just pass NULL to the dso handle parm if we don't actually
7247 have a DSO handle on this target. */
7248 arg2
= null_pointer_node
;
7254 if (!CP_DECL_THREAD_LOCAL_P (decl
)
7255 && targetm
.cxx
.use_aeabi_atexit ())
7271 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7272 arg0
, arg1
, arg2
, NULL_TREE
);
7275 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7276 is its initializer. Generate code to handle the construction
7277 and destruction of DECL. */
7280 expand_static_init (tree decl
, tree init
)
7282 gcc_assert (VAR_P (decl
));
7283 gcc_assert (TREE_STATIC (decl
));
7285 /* Some variables require no dynamic initialization. */
7286 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7288 /* Make sure the destructor is callable. */
7289 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7294 if (CP_DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7295 && !DECL_FUNCTION_SCOPE_P (decl
))
7298 error ("non-local variable %qD declared %<__thread%> "
7299 "needs dynamic initialization", decl
);
7301 error ("non-local variable %qD declared %<__thread%> "
7302 "has a non-trivial destructor", decl
);
7303 static bool informed
;
7306 inform (DECL_SOURCE_LOCATION (decl
),
7307 "C++11 %<thread_local%> allows dynamic initialization "
7314 if (DECL_FUNCTION_SCOPE_P (decl
))
7316 /* Emit code to perform this initialization but once. */
7317 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7318 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7319 tree guard
, guard_addr
;
7321 /* We don't need thread-safety code for thread-local vars. */
7322 bool thread_guard
= (flag_threadsafe_statics
7323 && !CP_DECL_THREAD_LOCAL_P (decl
));
7325 /* Emit code to perform this initialization but once. This code
7328 static <type> guard;
7329 if (!__atomic_load (guard.first_byte)) {
7330 if (__cxa_guard_acquire (&guard)) {
7333 // Do initialization.
7334 flag = true; __cxa_guard_release (&guard);
7335 // Register variable for destruction at end of program.
7337 if (!flag) __cxa_guard_abort (&guard);
7341 Note that the `flag' variable is only set to 1 *after* the
7342 initialization is complete. This ensures that an exception,
7343 thrown during the construction, will cause the variable to
7344 reinitialized when we pass through this code again, as per:
7348 If the initialization exits by throwing an exception, the
7349 initialization is not complete, so it will be tried again
7350 the next time control enters the declaration.
7352 This process should be thread-safe, too; multiple threads
7353 should not be able to initialize the variable more than
7356 /* Create the guard variable. */
7357 guard
= get_guard (decl
);
7359 /* Begin the conditional initialization. */
7360 if_stmt
= begin_if_stmt ();
7362 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7363 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7367 tree vfntype
= NULL_TREE
;
7368 tree acquire_name
, release_name
, abort_name
;
7369 tree acquire_fn
, release_fn
, abort_fn
;
7370 guard_addr
= build_address (guard
);
7372 acquire_name
= get_identifier ("__cxa_guard_acquire");
7373 release_name
= get_identifier ("__cxa_guard_release");
7374 abort_name
= get_identifier ("__cxa_guard_abort");
7375 acquire_fn
= identifier_global_value (acquire_name
);
7376 release_fn
= identifier_global_value (release_name
);
7377 abort_fn
= identifier_global_value (abort_name
);
7379 acquire_fn
= push_library_fn
7380 (acquire_name
, build_function_type_list (integer_type_node
,
7381 TREE_TYPE (guard_addr
),
7383 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7384 if (!release_fn
|| !abort_fn
)
7385 vfntype
= build_function_type_list (void_type_node
,
7386 TREE_TYPE (guard_addr
),
7389 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7390 ECF_NOTHROW
| ECF_LEAF
);
7392 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7393 ECF_NOTHROW
| ECF_LEAF
);
7395 inner_if_stmt
= begin_if_stmt ();
7396 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7399 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7400 begin
= get_target_expr (boolean_false_node
);
7401 flag
= TARGET_EXPR_SLOT (begin
);
7403 TARGET_EXPR_CLEANUP (begin
)
7404 = build3 (COND_EXPR
, void_type_node
, flag
,
7406 build_call_n (abort_fn
, 1, guard_addr
));
7407 CLEANUP_EH_ONLY (begin
) = 1;
7409 /* Do the initialization itself. */
7410 init
= add_stmt_to_compound (begin
, init
);
7411 init
= add_stmt_to_compound
7412 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7413 init
= add_stmt_to_compound
7414 (init
, build_call_n (release_fn
, 1, guard_addr
));
7417 init
= add_stmt_to_compound (init
, set_guard (guard
));
7419 /* Use atexit to register a function for destroying this static
7421 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7423 finish_expr_stmt (init
);
7427 finish_compound_stmt (inner_then_clause
);
7428 finish_then_clause (inner_if_stmt
);
7429 finish_if_stmt (inner_if_stmt
);
7432 finish_compound_stmt (then_clause
);
7433 finish_then_clause (if_stmt
);
7434 finish_if_stmt (if_stmt
);
7436 else if (CP_DECL_THREAD_LOCAL_P (decl
))
7437 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7439 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7443 /* Make TYPE a complete type based on INITIAL_VALUE.
7444 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7445 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7446 3 if the initializer list is empty (in pedantic mode). */
7449 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7452 tree type
, elt_type
;
7454 /* Don't get confused by a CONSTRUCTOR for some other type. */
7455 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7456 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7461 unsigned HOST_WIDE_INT i
;
7464 /* An array of character type can be initialized from a
7465 brace-enclosed string constant.
7467 FIXME: this code is duplicated from reshape_init. Probably
7468 we should just call reshape_init here? */
7469 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7470 && TREE_CODE (initial_value
) == CONSTRUCTOR
7471 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7473 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7474 tree value
= (*v
)[0].value
;
7476 if (TREE_CODE (value
) == STRING_CST
7477 && v
->length () == 1)
7478 initial_value
= value
;
7481 /* If any of the elements are parameter packs, we can't actually
7482 complete this type now because the array size is dependent. */
7483 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7485 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7488 if (PACK_EXPANSION_P (value
))
7494 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7496 /* We can create the array before the element type is complete, which
7497 means that we didn't have these two bits set in the original type
7498 either. In completing the type, we are expected to propagate these
7499 bits. See also complete_type which does the same thing for arrays
7502 if (TYPE_DOMAIN (type
))
7504 elt_type
= TREE_TYPE (type
);
7505 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7506 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7507 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7513 /* As above, but either give an error or reject zero-size arrays, depending
7517 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7518 bool do_default
, tsubst_flags_t complain
)
7521 bool sfinae
= !(complain
& tf_error
);
7522 /* In SFINAE context we can't be lenient about zero-size arrays. */
7525 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7531 /* Not an error. */;
7532 else if (failure
== 1)
7533 error ("initializer fails to determine size of %qT", *ptype
);
7534 else if (failure
== 2)
7537 error ("array size missing in %qT", *ptype
);
7539 else if (failure
== 3)
7540 error ("zero-size array %qT", *ptype
);
7541 *ptype
= error_mark_node
;
7546 /* Return zero if something is declared to be a member of type
7547 CTYPE when in the context of CUR_TYPE. STRING is the error
7548 message to print in that case. Otherwise, quietly return 1. */
7551 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7553 if (ctype
&& ctype
!= cur_type
)
7555 if (flags
== DTOR_FLAG
)
7556 error ("destructor for alien class %qT cannot be a member", ctype
);
7558 error ("constructor for alien class %qT cannot be a member", ctype
);
7564 /* Subroutine of `grokdeclarator'. */
7566 /* Generate errors possibly applicable for a given set of specifiers.
7567 This is for ARM $7.1.2. */
7570 bad_specifiers (tree object
,
7571 enum bad_spec_place type
,
7582 error ("%qD declared as a %<virtual%> variable", object
);
7584 error ("%qD declared as an %<inline%> variable", object
);
7586 error ("%<const%> and %<volatile%> function specifiers on "
7587 "%qD invalid in variable declaration", object
);
7591 error ("%qD declared as a %<virtual%> parameter", object
);
7593 error ("%qD declared as an %<inline%> parameter", object
);
7595 error ("%<const%> and %<volatile%> function specifiers on "
7596 "%qD invalid in parameter declaration", object
);
7600 error ("%qD declared as a %<virtual%> type", object
);
7602 error ("%qD declared as an %<inline%> type", object
);
7604 error ("%<const%> and %<volatile%> function specifiers on "
7605 "%qD invalid in type declaration", object
);
7609 error ("%qD declared as a %<virtual%> field", object
);
7611 error ("%qD declared as an %<inline%> field", object
);
7613 error ("%<const%> and %<volatile%> function specifiers on "
7614 "%qD invalid in field declaration", object
);
7620 error ("%q+D declared as a friend", object
);
7622 && (TREE_CODE (object
) == TYPE_DECL
7623 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7624 && !TYPE_REFFN_P (TREE_TYPE (object
))
7625 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7626 error ("%q+D declared with an exception specification", object
);
7629 /* DECL is a member function or static data member and is presently
7630 being defined. Check that the definition is taking place in a
7634 check_class_member_definition_namespace (tree decl
)
7636 /* These checks only apply to member functions and static data
7638 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7639 /* We check for problems with specializations in pt.c in
7640 check_specialization_namespace, where we can issue better
7642 if (processing_specialization
)
7644 /* There are no restrictions on the placement of
7645 explicit instantiations. */
7646 if (processing_explicit_instantiation
)
7650 A member function definition that appears outside of the
7651 class definition shall appear in a namespace scope enclosing
7652 the class definition.
7656 The definition for a static data member shall appear in a
7657 namespace scope enclosing the member's class definition. */
7658 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7659 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7660 decl
, DECL_CONTEXT (decl
));
7663 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7664 METHOD_TYPE for a non-static member function; QUALS are the
7665 cv-qualifiers that apply to the function. */
7668 build_this_parm (tree type
, cp_cv_quals quals
)
7673 cp_cv_quals this_quals
;
7675 if (CLASS_TYPE_P (type
))
7678 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7679 this_type
= build_pointer_type (this_type
);
7682 this_type
= type_of_this_parm (type
);
7683 /* The `this' parameter is implicitly `const'; it cannot be
7685 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7686 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7687 parm
= build_artificial_parm (this_identifier
, qual_type
);
7688 cp_apply_type_quals_to_decl (this_quals
, parm
);
7692 /* DECL is a static member function. Complain if it was declared
7693 with function-cv-quals. */
7696 check_static_quals (tree decl
, cp_cv_quals quals
)
7698 if (quals
!= TYPE_UNQUALIFIED
)
7699 error ("static member function %q#D declared with type qualifiers",
7703 // Check that FN takes no arguments and returns bool.
7705 check_concept_fn (tree fn
)
7707 // A constraint is nullary.
7708 if (DECL_ARGUMENTS (fn
))
7709 error ("concept %q#D declared with function parameters", fn
);
7711 // The declared return type of the concept shall be bool, and
7712 // it shall not be deduced from it definition.
7713 tree type
= TREE_TYPE (TREE_TYPE (fn
));
7715 error ("concept %q#D declared with a deduced return type", fn
);
7716 else if (type
!= boolean_type_node
)
7717 error ("concept %q#D with non-%<bool%> return type %qT", fn
, type
);
7720 /* Helper function. Replace the temporary this parameter injected
7721 during cp_finish_omp_declare_simd with the real this parameter. */
7724 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7726 tree this_parm
= (tree
) data
;
7727 if (TREE_CODE (*tp
) == PARM_DECL
7728 && DECL_NAME (*tp
) == this_identifier
7729 && *tp
!= this_parm
)
7731 else if (TYPE_P (*tp
))
7736 /* CTYPE is class type, or null if non-class.
7737 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7739 DECLARATOR is the function's name.
7740 PARMS is a chain of PARM_DECLs for the function.
7741 VIRTUALP is truthvalue of whether the function is virtual or not.
7742 FLAGS are to be passed through to `grokclassfn'.
7743 QUALS are qualifiers indicating whether the function is `const'
7745 RAISES is a list of exceptions that this function can raise.
7746 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7747 not look, and -1 if we should not call `grokclassfn' at all.
7749 SFK is the kind of special function (if any) for the new function.
7751 Returns `NULL_TREE' if something goes wrong, after issuing
7752 applicable error messages. */
7755 grokfndecl (tree ctype
,
7759 tree orig_declarator
,
7762 enum overload_flags flags
,
7764 cp_ref_qualifier rqual
,
7771 special_function_kind sfk
,
7776 location_t location
)
7779 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7782 // Was the concept specifier present?
7783 bool concept_p
= inlinep
& 4;
7785 // Concept declarations must have a corresponding definition.
7786 if (concept_p
&& !funcdef_flag
)
7788 error ("concept %qD has no definition", declarator
);
7793 type
= build_ref_qualified_type (type
, rqual
);
7795 type
= build_exception_variant (type
, raises
);
7797 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7799 /* Set the constraints on the declaration. */
7802 tree tmpl_reqs
= NULL_TREE
;
7803 if (processing_template_decl
> template_class_depth (ctype
))
7804 tmpl_reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
7806 /* Adjust the required expression into a constraint. */
7808 decl_reqs
= make_predicate_constraint (decl_reqs
);
7810 tree ci
= build_constraints (tmpl_reqs
, decl_reqs
);
7811 set_constraints (decl
, ci
);
7814 /* If we have an explicit location, use it, otherwise use whatever
7815 build_lang_decl used (probably input_location). */
7816 if (location
!= UNKNOWN_LOCATION
)
7817 DECL_SOURCE_LOCATION (decl
) = location
;
7819 if (TREE_CODE (type
) == METHOD_TYPE
)
7822 parm
= build_this_parm (type
, quals
);
7823 DECL_CHAIN (parm
) = parms
;
7826 /* Allocate space to hold the vptr bit if needed. */
7827 DECL_ALIGN (decl
) = MINIMUM_METHOD_BOUNDARY
;
7829 DECL_ARGUMENTS (decl
) = parms
;
7830 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7831 DECL_CONTEXT (t
) = decl
;
7832 /* Propagate volatile out from type to decl. */
7833 if (TYPE_VOLATILE (type
))
7834 TREE_THIS_VOLATILE (decl
) = 1;
7836 /* Setup decl according to sfk. */
7839 case sfk_constructor
:
7840 case sfk_copy_constructor
:
7841 case sfk_move_constructor
:
7842 DECL_CONSTRUCTOR_P (decl
) = 1;
7844 case sfk_destructor
:
7845 DECL_DESTRUCTOR_P (decl
) = 1;
7852 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7856 ("defining explicit specialization %qD in friend declaration",
7860 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7861 tree args
= TREE_OPERAND (orig_declarator
, 1);
7863 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7865 /* Something like `template <class T> friend void f<T>()'. */
7866 error ("invalid use of template-id %qD in declaration "
7867 "of primary template",
7873 /* A friend declaration of the form friend void f<>(). Record
7874 the information in the TEMPLATE_ID_EXPR. */
7875 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7877 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7878 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7880 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7881 if (TREE_PURPOSE (t
)
7882 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7884 error ("default arguments are not allowed in declaration "
7885 "of friend template specialization %qD",
7892 error ("%<inline%> is not allowed in declaration of friend "
7893 "template specialization %qD",
7900 /* If this decl has namespace scope, set that up. */
7902 set_decl_namespace (decl
, in_namespace
, friendp
);
7904 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7906 /* `main' and builtins have implicit 'C' linkage. */
7907 if ((MAIN_NAME_P (declarator
)
7908 || (IDENTIFIER_LENGTH (declarator
) > 10
7909 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7910 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7911 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7912 || (targetcm
.cxx_implicit_extern_c
7913 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7914 && current_lang_name
== lang_name_cplusplus
7915 && ctype
== NULL_TREE
7916 && DECL_FILE_SCOPE_P (decl
))
7917 SET_DECL_LANGUAGE (decl
, lang_c
);
7919 /* Should probably propagate const out from type to decl I bet (mrs). */
7922 DECL_STATIC_FUNCTION_P (decl
) = 1;
7923 DECL_CONTEXT (decl
) = ctype
;
7927 DECL_DELETED_FN (decl
) = 1;
7931 DECL_CONTEXT (decl
) = ctype
;
7933 check_class_member_definition_namespace (decl
);
7936 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7938 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7939 error ("cannot declare %<::main%> to be a template");
7941 error ("cannot declare %<::main%> to be inline");
7943 error ("cannot declare %<::main%> to be constexpr");
7945 error ("cannot declare %<::main%> to be static");
7950 /* Members of anonymous types and local classes have no linkage; make
7951 them internal. If a typedef is made later, this will be changed. */
7952 if (ctype
&& (!TREE_PUBLIC (TYPE_MAIN_DECL (ctype
))
7953 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7956 if (publicp
&& cxx_dialect
== cxx98
)
7958 /* [basic.link]: A name with no linkage (notably, the name of a class
7959 or enumeration declared in a local scope) shall not be used to
7960 declare an entity with linkage.
7962 DR 757 relaxes this restriction for C++0x. */
7963 no_linkage_error (decl
);
7966 TREE_PUBLIC (decl
) = publicp
;
7969 DECL_INTERFACE_KNOWN (decl
) = 1;
7970 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7973 /* If the declaration was declared inline, mark it as such. */
7976 DECL_DECLARED_INLINE_P (decl
) = 1;
7978 DECL_COMDAT (decl
) = 1;
7981 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7983 // If the concept declaration specifier was found, check
7984 // that the declaration satisfies the necessary requirements.
7987 DECL_DECLARED_CONCEPT_P (decl
) = true;
7988 check_concept_fn (decl
);
7991 DECL_EXTERNAL (decl
) = 1;
7992 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7995 TREE_TYPE (decl
) = apply_memfn_quals (TREE_TYPE (decl
),
8002 ? G_("static member function %qD cannot have cv-qualifier")
8003 : G_("non-member function %qD cannot have cv-qualifier"),
8005 quals
= TYPE_UNQUALIFIED
;
8011 ? G_("static member function %qD cannot have ref-qualifier")
8012 : G_("non-member function %qD cannot have ref-qualifier"),
8014 rqual
= REF_QUAL_NONE
;
8018 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
8019 && !grok_op_properties (decl
, /*complain=*/true))
8021 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
8023 bool long_long_unsigned_p
;
8025 const char *suffix
= NULL
;
8026 /* [over.literal]/6: Literal operators shall not have C linkage. */
8027 if (DECL_LANGUAGE (decl
) == lang_c
)
8029 error ("literal operator with C linkage");
8033 if (DECL_NAMESPACE_SCOPE_P (decl
))
8035 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
8038 error ("%qD has invalid argument list", decl
);
8042 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
8043 if (long_long_unsigned_p
)
8045 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
8046 warning (0, "integer suffix %<%s%>"
8047 " shadowed by implementation", suffix
);
8049 else if (long_double_p
)
8051 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
8052 warning (0, "floating point suffix %<%s%>"
8053 " shadowed by implementation", suffix
);
8058 error ("%qD must be a non-member function", decl
);
8064 /* Make the init_value nonzero so pushdecl knows this is not
8065 tentative. error_mark_node is replaced later with the BLOCK. */
8066 DECL_INITIAL (decl
) = error_mark_node
;
8068 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
8069 TREE_NOTHROW (decl
) = 1;
8071 if (flag_openmp
|| flag_openmp_simd
|| flag_cilkplus
)
8073 /* Adjust "omp declare simd" attributes. */
8074 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
8078 for (attr
= ods
; attr
;
8079 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
8081 if (TREE_CODE (type
) == METHOD_TYPE
)
8082 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
8083 DECL_ARGUMENTS (decl
), NULL
);
8084 if (TREE_VALUE (attr
) != NULL_TREE
)
8086 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
8087 cl
= c_omp_declare_simd_clauses_to_numbers
8088 (DECL_ARGUMENTS (decl
), cl
);
8090 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
8092 TREE_VALUE (attr
) = NULL_TREE
;
8098 /* Caller will do the rest of this. */
8102 if (ctype
!= NULL_TREE
)
8103 grokclassfn (ctype
, decl
, flags
);
8106 if (cxx_dialect
>= cxx11
8107 && DECL_DESTRUCTOR_P (decl
)
8108 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
8109 && !processing_template_decl
)
8110 deduce_noexcept_on_destructor (decl
);
8112 decl
= check_explicit_specialization (orig_declarator
, decl
,
8115 4 * (friendp
!= 0) +
8117 if (decl
== error_mark_node
)
8120 if (DECL_STATIC_FUNCTION_P (decl
))
8121 check_static_quals (decl
, quals
);
8125 cplus_decl_attributes (&decl
, *attrlist
, 0);
8126 *attrlist
= NULL_TREE
;
8129 /* Check main's type after attributes have been applied. */
8130 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
8132 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
8135 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8137 error ("%<::main%> must return %<int%>");
8138 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
8139 TREE_TYPE (decl
) = newtype
;
8142 check_main_parameter_types (decl
);
8145 if (ctype
!= NULL_TREE
8146 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
8149 tree old_decl
= check_classfn (ctype
, decl
,
8150 (processing_template_decl
8151 > template_class_depth (ctype
))
8152 ? current_template_parms
8155 if (old_decl
== error_mark_node
)
8163 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8164 /* Because grokfndecl is always supposed to return a
8165 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8166 here. We depend on our callers to figure out that its
8167 really a template that's being returned. */
8168 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8170 if (DECL_STATIC_FUNCTION_P (old_decl
)
8171 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8173 /* Remove the `this' parm added by grokclassfn. */
8174 revert_static_member_fn (decl
);
8175 check_static_quals (decl
, quals
);
8177 if (DECL_ARTIFICIAL (old_decl
))
8179 error ("definition of implicitly-declared %qD", old_decl
);
8182 else if (DECL_DEFAULTED_FN (old_decl
))
8184 error ("definition of explicitly-defaulted %q+D", decl
);
8185 error ("%q+#D explicitly defaulted here", old_decl
);
8189 /* Since we've smashed OLD_DECL to its
8190 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8191 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8192 decl
= DECL_TEMPLATE_RESULT (decl
);
8194 /* Attempt to merge the declarations. This can fail, in
8195 the case of some invalid specialization declarations. */
8196 pushed_scope
= push_scope (ctype
);
8197 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8199 pop_scope (pushed_scope
);
8202 error ("no %q#D member function declared in class %qT",
8206 if (ok
== error_mark_node
)
8212 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8215 if (ctype
== NULL_TREE
|| check
)
8219 DECL_VIRTUAL_P (decl
) = 1;
8224 /* decl is a FUNCTION_DECL.
8225 specifiers are the parsed virt-specifiers.
8227 Set flags to reflect the virt-specifiers.
8232 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8234 if (decl
== NULL_TREE
)
8236 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8237 DECL_OVERRIDE_P (decl
) = 1;
8238 if (specifiers
& VIRT_SPEC_FINAL
)
8239 DECL_FINAL_P (decl
) = 1;
8243 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8244 the linkage that DECL will receive in the object file. */
8247 set_linkage_for_static_data_member (tree decl
)
8249 /* A static data member always has static storage duration and
8250 external linkage. Note that static data members are forbidden in
8251 local classes -- the only situation in which a class has
8252 non-external linkage. */
8253 TREE_PUBLIC (decl
) = 1;
8254 TREE_STATIC (decl
) = 1;
8255 /* For non-template classes, static data members are always put
8256 out in exactly those files where they are defined, just as
8257 with ordinary namespace-scope variables. */
8258 if (!processing_template_decl
)
8259 DECL_INTERFACE_KNOWN (decl
) = 1;
8262 /* Create a VAR_DECL named NAME with the indicated TYPE.
8264 If SCOPE is non-NULL, it is the class type or namespace containing
8265 the variable. If SCOPE is NULL, the variable should is created in
8266 the innermost enclosing scope. */
8269 grokvardecl (tree type
,
8271 tree orig_declarator
,
8272 const cp_decl_specifier_seq
*declspecs
,
8279 tree explicit_scope
;
8281 gcc_assert (!name
|| identifier_p (name
));
8283 bool constp
= flags
&1;
8284 bool conceptp
= flags
&2;
8286 /* Compute the scope in which to place the variable, but remember
8287 whether or not that scope was explicitly specified by the user. */
8288 explicit_scope
= scope
;
8291 /* An explicit "extern" specifier indicates a namespace-scope
8293 if (declspecs
->storage_class
== sc_extern
)
8294 scope
= current_decl_namespace ();
8295 else if (!at_function_scope_p ())
8296 scope
= current_scope ();
8300 && (/* If the variable is a namespace-scope variable declared in a
8301 template, we need DECL_LANG_SPECIFIC. */
8302 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8303 /* Similarly for namespace-scope variables with language linkage
8305 || (TREE_CODE (scope
) == NAMESPACE_DECL
8306 && current_lang_name
!= lang_name_cplusplus
)
8307 /* Similarly for static data members. */
8309 /* Similarly for explicit specializations. */
8311 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8312 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8314 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8316 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8317 set_decl_namespace (decl
, explicit_scope
, 0);
8319 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8321 if (declspecs
->storage_class
== sc_extern
)
8323 DECL_THIS_EXTERN (decl
) = 1;
8324 DECL_EXTERNAL (decl
) = !initialized
;
8327 if (DECL_CLASS_SCOPE_P (decl
))
8329 set_linkage_for_static_data_member (decl
);
8330 /* This function is only called with out-of-class definitions. */
8331 DECL_EXTERNAL (decl
) = 0;
8332 check_class_member_definition_namespace (decl
);
8334 /* At top level, either `static' or no s.c. makes a definition
8335 (perhaps tentative), and absence of `static' makes it public. */
8336 else if (toplevel_bindings_p ())
8338 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8339 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8340 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8342 /* Not at top level, only `static' makes a static definition. */
8345 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8346 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8349 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8351 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8353 CP_DECL_THREAD_LOCAL_P (decl
) = true;
8354 if (!processing_template_decl
)
8355 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8357 if (declspecs
->gnu_thread_keyword_p
)
8358 SET_DECL_GNU_TLS_P (decl
);
8361 /* If the type of the decl has no linkage, make sure that we'll
8362 notice that in mark_used. */
8363 if (cxx_dialect
> cxx98
8364 && decl_linkage (decl
) != lk_none
8365 && DECL_LANG_SPECIFIC (decl
) == NULL
8366 && !DECL_EXTERN_C_P (decl
)
8367 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8368 retrofit_lang_decl (decl
);
8370 if (TREE_PUBLIC (decl
))
8372 /* [basic.link]: A name with no linkage (notably, the name of a class
8373 or enumeration declared in a local scope) shall not be used to
8374 declare an entity with linkage.
8376 DR 757 relaxes this restriction for C++0x. */
8377 if (cxx_dialect
< cxx11
)
8378 no_linkage_error (decl
);
8381 DECL_INTERFACE_KNOWN (decl
) = 1;
8383 if (DECL_NAME (decl
)
8384 && MAIN_NAME_P (DECL_NAME (decl
))
8385 && scope
== global_namespace
)
8386 error ("cannot declare %<::main%> to be a global variable");
8388 /* Check that the variable can be safely declared as a concept.
8389 Note that this also forbids explicit specializations. */
8392 if (!processing_template_decl
)
8394 error ("a non-template variable cannot be %<concept%>");
8398 DECL_DECLARED_CONCEPT_P (decl
) = true;
8399 if (!same_type_ignoring_top_level_qualifiers_p (type
, boolean_type_node
))
8400 error_at (declspecs
->locations
[ds_type_spec
],
8401 "concept must have type %<bool%>");
8403 else if (flag_concepts
8404 && processing_template_decl
> template_class_depth (scope
))
8406 tree reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
8407 tree ci
= build_constraints (reqs
, NULL_TREE
);
8408 set_constraints (decl
, ci
);
8411 // Handle explicit specializations and instantiations of variable templates.
8412 if (orig_declarator
)
8413 decl
= check_explicit_specialization (orig_declarator
, decl
,
8414 template_count
, conceptp
* 8);
8416 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8419 /* Create and return a canonical pointer to member function type, for
8420 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8423 build_ptrmemfunc_type (tree type
)
8428 if (type
== error_mark_node
)
8431 /* Make sure that we always have the unqualified pointer-to-member
8433 if (cp_cv_quals quals
= cp_type_quals (type
))
8435 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8436 return cp_build_qualified_type (unqual
, quals
);
8439 /* If a canonical type already exists for this type, use it. We use
8440 this method instead of type_hash_canon, because it only does a
8441 simple equality check on the list of field members. */
8443 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8446 t
= make_node (RECORD_TYPE
);
8448 /* Let the front end know this is a pointer to member function. */
8449 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8451 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8454 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8456 DECL_CHAIN (field
) = fields
;
8459 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8461 /* Zap out the name so that the back end will give us the debugging
8462 information for this anonymous RECORD_TYPE. */
8463 TYPE_NAME (t
) = NULL_TREE
;
8465 /* Cache this pointer-to-member type so that we can find it again
8467 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8469 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8470 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8471 else if (TYPE_CANONICAL (type
) != type
)
8472 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8477 /* Create and return a pointer to data member type. */
8480 build_ptrmem_type (tree class_type
, tree member_type
)
8482 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8484 cp_cv_quals quals
= type_memfn_quals (member_type
);
8485 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8486 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8487 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8491 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8492 return build_offset_type (class_type
, member_type
);
8496 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8497 Check to see that the definition is valid. Issue appropriate error
8498 messages. Return 1 if the definition is particularly bad, or 0
8502 check_static_variable_definition (tree decl
, tree type
)
8504 /* Can't check yet if we don't know the type. */
8505 if (dependent_type_p (type
))
8507 /* If DECL is declared constexpr, we'll do the appropriate checks
8508 in check_initializer. */
8509 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8511 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8513 if (!COMPLETE_TYPE_P (type
))
8514 error ("in-class initialization of static data member %q#D of "
8515 "incomplete type", decl
);
8516 else if (literal_type_p (type
))
8517 permerror (input_location
,
8518 "%<constexpr%> needed for in-class initialization of "
8519 "static data member %q#D of non-integral type", decl
);
8521 error ("in-class initialization of static data member %q#D of "
8522 "non-literal type", decl
);
8526 /* Motion 10 at San Diego: If a static const integral data member is
8527 initialized with an integral constant expression, the initializer
8528 may appear either in the declaration (within the class), or in
8529 the definition, but not both. If it appears in the class, the
8530 member is a member constant. The file-scope definition is always
8532 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8534 error ("invalid in-class initialization of static data member "
8535 "of non-integral type %qT",
8539 else if (!CP_TYPE_CONST_P (type
))
8540 error ("ISO C++ forbids in-class initialization of non-const "
8541 "static member %qD",
8543 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8544 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8545 "%qD of non-integral type %qT", decl
, type
);
8550 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8551 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8552 expressions out into temporary variables so that walk_tree doesn't
8553 step into them (c++/15764). */
8556 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8558 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8559 tree expr
= *expr_p
;
8560 if (TREE_CODE (expr
) == SAVE_EXPR
)
8562 tree op
= TREE_OPERAND (expr
, 0);
8563 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8564 if (TREE_SIDE_EFFECTS (op
))
8565 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8568 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8573 /* Entry point for the above. */
8576 stabilize_vla_size (tree size
)
8578 hash_set
<tree
> pset
;
8579 /* Break out any function calls into temporary variables. */
8580 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8583 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8584 not inside of SAVE_EXPR and fold them. */
8587 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8589 tree expr
= *expr_p
;
8590 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8592 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8594 *(bool *)data
= true;
8595 if (SIZEOF_EXPR_TYPE_P (expr
))
8596 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8597 SIZEOF_EXPR
, false);
8598 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8599 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8602 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8604 if (expr
== error_mark_node
)
8605 expr
= size_one_node
;
8612 /* Given the SIZE (i.e., number of elements) in an array, compute an
8613 appropriate index type for the array. If non-NULL, NAME is the
8614 name of the thing being declared. */
8617 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8622 if (error_operand_p (size
))
8623 return error_mark_node
;
8625 if (!type_dependent_expression_p (size
))
8627 tree type
= TREE_TYPE (size
);
8629 mark_rvalue_use (size
);
8631 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8632 && TREE_SIDE_EFFECTS (size
))
8633 /* In C++98, we mark a non-constant array bound with a magic
8634 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8637 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8639 if (CLASS_TYPE_P (type
)
8640 && CLASSTYPE_LITERAL_P (type
))
8642 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8645 if (!(complain
& tf_error
))
8646 return error_mark_node
;
8648 error ("size of array %qD has non-integral type %qT",
8651 error ("size of array has non-integral type %qT", type
);
8652 size
= integer_one_node
;
8654 if (size
== error_mark_node
)
8655 return error_mark_node
;
8656 type
= TREE_TYPE (size
);
8659 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8660 size
= maybe_constant_value (size
);
8662 if (!TREE_CONSTANT (size
))
8666 if (error_operand_p (size
))
8667 return error_mark_node
;
8669 /* The array bound must be an integer type. */
8670 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8672 if (!(complain
& tf_error
))
8673 return error_mark_node
;
8675 error ("size of array %qD has non-integral type %qT", name
, type
);
8677 error ("size of array has non-integral type %qT", type
);
8678 size
= integer_one_node
;
8679 type
= TREE_TYPE (size
);
8683 /* A type is dependent if it is...an array type constructed from any
8684 dependent type or whose size is specified by a constant expression
8685 that is value-dependent. */
8686 /* We can only call value_dependent_expression_p on integral constant
8687 expressions; treat non-constant expressions as dependent, too. */
8688 if (processing_template_decl
8689 && (type_dependent_expression_p (size
)
8690 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8692 /* We cannot do any checking for a SIZE that isn't known to be
8693 constant. Just build the index type and mark that it requires
8694 structural equality checks. */
8695 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8696 size
, size_one_node
));
8697 TYPE_DEPENDENT_P (itype
) = 1;
8698 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8699 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8703 /* Normally, the array-bound will be a constant. */
8704 if (TREE_CODE (size
) == INTEGER_CST
)
8706 /* Check to see if the array bound overflowed. Make that an
8707 error, no matter how generous we're being. */
8708 constant_expression_error (size
);
8710 /* An array must have a positive number of elements. */
8711 if (tree_int_cst_lt (size
, integer_zero_node
))
8713 if (!(complain
& tf_error
))
8714 return error_mark_node
;
8716 error ("size of array %qD is negative", name
);
8718 error ("size of array is negative");
8719 size
= integer_one_node
;
8721 /* As an extension we allow zero-sized arrays. */
8722 else if (integer_zerop (size
))
8724 if (!(complain
& tf_error
))
8725 /* We must fail if performing argument deduction (as
8726 indicated by the state of complain), so that
8727 another substitution can be found. */
8728 return error_mark_node
;
8729 else if (in_system_header_at (input_location
))
8730 /* Allow them in system headers because glibc uses them. */;
8732 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8734 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8737 else if (TREE_CONSTANT (size
)
8738 /* We don't allow VLAs at non-function scopes, or during
8739 tentative template substitution. */
8740 || !at_function_scope_p ()
8741 || !(complain
& tf_error
))
8743 if (!(complain
& tf_error
))
8744 return error_mark_node
;
8745 /* `(int) &fn' is not a valid array bound. */
8747 error ("size of array %qD is not an integral constant-expression",
8750 error ("size of array is not an integral constant-expression");
8751 size
= integer_one_node
;
8753 else if (pedantic
&& warn_vla
!= 0)
8756 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8758 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8760 else if (warn_vla
> 0)
8764 "variable length array %qD is used", name
);
8767 "variable length array is used");
8770 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8771 /* A variable sized array. */
8772 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8775 HOST_WIDE_INT saved_processing_template_decl
;
8777 /* Compute the index of the largest element in the array. It is
8778 one less than the number of elements in the array. We save
8779 and restore PROCESSING_TEMPLATE_DECL so that computations in
8780 cp_build_binary_op will be appropriately folded. */
8781 saved_processing_template_decl
= processing_template_decl
;
8782 processing_template_decl
= 0;
8783 itype
= cp_build_binary_op (input_location
,
8785 cp_convert (ssizetype
, size
, complain
),
8786 cp_convert (ssizetype
, integer_one_node
,
8789 itype
= fold (itype
);
8790 processing_template_decl
= saved_processing_template_decl
;
8792 if (!TREE_CONSTANT (itype
))
8794 /* A variable sized array. */
8795 itype
= variable_size (itype
);
8797 if (TREE_CODE (itype
) != SAVE_EXPR
)
8799 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8800 they might survive till gimplification. */
8801 tree newitype
= itype
;
8803 cp_walk_tree_without_duplicates (&newitype
,
8804 fold_sizeof_expr_r
, &found
);
8806 itype
= variable_size (fold (newitype
));
8809 stabilize_vla_size (itype
);
8811 if (flag_sanitize
& SANITIZE_VLA
8812 && do_ubsan_in_current_function ())
8814 /* We have to add 1 -- in the ubsan routine we generate
8815 LE_EXPR rather than LT_EXPR. */
8816 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8817 build_one_cst (TREE_TYPE (itype
)));
8818 t
= ubsan_instrument_vla (input_location
, t
);
8819 finish_expr_stmt (t
);
8822 /* Make sure that there was no overflow when creating to a signed
8823 index type. (For example, on a 32-bit machine, an array with
8824 size 2^32 - 1 is too big.) */
8825 else if (TREE_CODE (itype
) == INTEGER_CST
8826 && TREE_OVERFLOW (itype
))
8828 if (!(complain
& tf_error
))
8829 return error_mark_node
;
8830 error ("overflow in array dimension");
8831 TREE_OVERFLOW (itype
) = 0;
8835 /* Create and return the appropriate index type. */
8836 itype
= build_index_type (itype
);
8838 /* If the index type were dependent, we would have returned early, so
8839 remember that it isn't. */
8840 TYPE_DEPENDENT_P (itype
) = 0;
8841 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8845 /* Returns the scope (if any) in which the entity declared by
8846 DECLARATOR will be located. If the entity was declared with an
8847 unqualified name, NULL_TREE is returned. */
8850 get_scope_of_declarator (const cp_declarator
*declarator
)
8852 while (declarator
&& declarator
->kind
!= cdk_id
)
8853 declarator
= declarator
->declarator
;
8855 /* If the declarator-id is a SCOPE_REF, the scope in which the
8856 declaration occurs is the first operand. */
8858 && declarator
->u
.id
.qualifying_scope
)
8859 return declarator
->u
.id
.qualifying_scope
;
8861 /* Otherwise, the declarator is not a qualified name; the entity will
8862 be declared in the current scope. */
8866 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8867 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8871 create_array_type_for_decl (tree name
, tree type
, tree size
)
8873 tree itype
= NULL_TREE
;
8875 /* If things have already gone awry, bail now. */
8876 if (type
== error_mark_node
|| size
== error_mark_node
)
8877 return error_mark_node
;
8879 /* 8.3.4/1: If the type of the identifier of D contains the auto
8880 type-specifier, the program is ill-formed. */
8881 if (type_uses_auto (type
))
8883 error ("%qD declared as array of %qT", name
, type
);
8884 return error_mark_node
;
8887 /* If there are some types which cannot be array elements,
8888 issue an error-message and return. */
8889 switch (TREE_CODE (type
))
8893 error ("declaration of %qD as array of void", name
);
8895 error ("creating array of void");
8896 return error_mark_node
;
8900 error ("declaration of %qD as array of functions", name
);
8902 error ("creating array of functions");
8903 return error_mark_node
;
8905 case REFERENCE_TYPE
:
8907 error ("declaration of %qD as array of references", name
);
8909 error ("creating array of references");
8910 return error_mark_node
;
8914 error ("declaration of %qD as array of function members", name
);
8916 error ("creating array of function members");
8917 return error_mark_node
;
8925 The constant expressions that specify the bounds of the arrays
8926 can be omitted only for the first member of the sequence. */
8927 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8930 error ("declaration of %qD as multidimensional array must "
8931 "have bounds for all dimensions except the first",
8934 error ("multidimensional array must have bounds for all "
8935 "dimensions except the first");
8937 return error_mark_node
;
8940 /* Figure out the index type for the array. */
8942 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8945 T is called the array element type; this type shall not be [...] an
8946 abstract class type. */
8947 abstract_virtuals_error (name
, type
);
8949 return build_cplus_array_type (type
, itype
);
8952 /* Returns the smallest location != UNKNOWN_LOCATION among the
8953 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
8954 and LOCATIONS[ds_restrict]. */
8957 smallest_type_quals_location (int type_quals
, const location_t
* locations
)
8959 location_t loc
= UNKNOWN_LOCATION
;
8961 if (type_quals
& TYPE_QUAL_CONST
)
8962 loc
= locations
[ds_const
];
8964 if ((type_quals
& TYPE_QUAL_VOLATILE
)
8965 && (loc
== UNKNOWN_LOCATION
|| locations
[ds_volatile
] < loc
))
8966 loc
= locations
[ds_volatile
];
8968 if ((type_quals
& TYPE_QUAL_RESTRICT
)
8969 && (loc
== UNKNOWN_LOCATION
|| locations
[ds_restrict
] < loc
))
8970 loc
= locations
[ds_restrict
];
8975 /* Check that it's OK to declare a function with the indicated TYPE
8976 and TYPE_QUALS. SFK indicates the kind of special function (if any)
8977 that this function is. OPTYPE is the type given in a conversion
8978 operator declaration, or the class type for a constructor/destructor.
8979 Returns the actual return type of the function; that may be different
8980 than TYPE if an error occurs, or for certain special functions. */
8983 check_special_function_return_type (special_function_kind sfk
,
8987 const location_t
* locations
)
8991 case sfk_constructor
:
8993 error ("return type specification for constructor invalid");
8994 else if (type_quals
!= TYPE_UNQUALIFIED
)
8995 error_at (smallest_type_quals_location (type_quals
, locations
),
8996 "qualifiers are not allowed on constructor declaration");
8998 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8999 type
= build_pointer_type (optype
);
9001 type
= void_type_node
;
9004 case sfk_destructor
:
9006 error ("return type specification for destructor invalid");
9007 else if (type_quals
!= TYPE_UNQUALIFIED
)
9008 error_at (smallest_type_quals_location (type_quals
, locations
),
9009 "qualifiers are not allowed on destructor declaration");
9011 /* We can't use the proper return type here because we run into
9012 problems with ambiguous bases and covariant returns.
9013 Java classes are left unchanged because (void *) isn't a valid
9014 Java type, and we don't want to change the Java ABI. */
9015 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
9016 type
= build_pointer_type (void_type_node
);
9018 type
= void_type_node
;
9021 case sfk_conversion
:
9023 error ("return type specified for %<operator %T%>", optype
);
9024 else if (type_quals
!= TYPE_UNQUALIFIED
)
9025 error_at (smallest_type_quals_location (type_quals
, locations
),
9026 "qualifiers are not allowed on declaration of "
9027 "%<operator %T%>", optype
);
9039 /* A variable or data member (whose unqualified name is IDENTIFIER)
9040 has been declared with the indicated TYPE. If the TYPE is not
9041 acceptable, issue an error message and return a type to use for
9042 error-recovery purposes. */
9045 check_var_type (tree identifier
, tree type
)
9047 if (VOID_TYPE_P (type
))
9050 error ("unnamed variable or field declared void");
9051 else if (identifier_p (identifier
))
9053 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
9054 error ("variable or field %qE declared void", identifier
);
9057 error ("variable or field declared void");
9058 type
= error_mark_node
;
9064 /* Given declspecs and a declarator (abstract or otherwise), determine
9065 the name and type of the object declared and construct a DECL node
9068 DECLSPECS points to the representation of declaration-specifier
9069 sequence that precedes declarator.
9071 DECL_CONTEXT says which syntactic context this declaration is in:
9072 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9073 FUNCDEF for a function definition. Like NORMAL but a few different
9074 error messages in each case. Return value may be zero meaning
9075 this definition is too screwy to try to parse.
9076 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9077 handle member functions (which have FIELD context).
9078 Return value may be zero meaning this definition is too screwy to
9080 PARM for a parameter declaration (either within a function prototype
9081 or before a function body). Make a PARM_DECL, or return void_type_node.
9082 TPARM for a template parameter declaration.
9083 CATCHPARM for a parameter declaration before a catch clause.
9084 TYPENAME if for a typename (in a cast or sizeof).
9085 Don't make a DECL node; just return the ..._TYPE node.
9086 FIELD for a struct or union field; make a FIELD_DECL.
9087 BITFIELD for a field with specified width.
9089 INITIALIZED is as for start_decl.
9091 ATTRLIST is a pointer to the list of attributes, which may be NULL
9092 if there are none; *ATTRLIST may be modified if attributes from inside
9093 the declarator should be applied to the declaration.
9095 When this function is called, scoping variables (such as
9096 CURRENT_CLASS_TYPE) should reflect the scope in which the
9097 declaration occurs, not the scope in which the new declaration will
9098 be placed. For example, on:
9102 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9105 Returns a DECL (if a declarator is present), a TYPE (if there is no
9106 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9110 grokdeclarator (const cp_declarator
*declarator
,
9111 cp_decl_specifier_seq
*declspecs
,
9112 enum decl_context decl_context
,
9116 tree type
= NULL_TREE
;
9118 int explicit_intN
= 0;
9119 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
9120 int explicit_int
= 0;
9121 int explicit_char
= 0;
9122 int defaulted_int
= 0;
9124 tree typedef_decl
= NULL_TREE
;
9125 const char *name
= NULL
;
9126 tree typedef_type
= NULL_TREE
;
9127 /* True if this declarator is a function definition. */
9128 bool funcdef_flag
= false;
9129 cp_declarator_kind innermost_code
= cdk_error
;
9132 /* See the code below that used this. */
9133 tree decl_attr
= NULL_TREE
;
9136 /* Keep track of what sort of function is being processed
9137 so that we can warn about default return values, or explicit
9138 return values which do not match prescribed defaults. */
9139 special_function_kind sfk
= sfk_none
;
9141 tree dname
= NULL_TREE
;
9142 tree ctor_return_type
= NULL_TREE
;
9143 enum overload_flags flags
= NO_SPECIAL
;
9144 /* cv-qualifiers that apply to the declarator, for a declaration of
9145 a member function. */
9146 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
9147 /* virt-specifiers that apply to the declarator, for a declaration of
9148 a member function. */
9149 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
9150 /* ref-qualifier that applies to the declarator, for a declaration of
9151 a member function. */
9152 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
9153 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9154 int type_quals
= TYPE_UNQUALIFIED
;
9155 tree raises
= NULL_TREE
;
9156 int template_count
= 0;
9157 tree returned_attrs
= NULL_TREE
;
9158 tree parms
= NULL_TREE
;
9159 const cp_declarator
*id_declarator
;
9160 /* The unqualified name of the declarator; either an
9161 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9162 tree unqualified_id
;
9163 /* The class type, if any, in which this entity is located,
9164 or NULL_TREE if none. Note that this value may be different from
9165 the current class type; for example if an attempt is made to declare
9166 "A::f" inside "B", this value will be "A". */
9167 tree ctype
= current_class_type
;
9168 /* The NAMESPACE_DECL for the namespace in which this entity is
9169 located. If an unqualified name is used to declare the entity,
9170 this value will be NULL_TREE, even if the entity is located at
9172 tree in_namespace
= NULL_TREE
;
9173 cp_storage_class storage_class
;
9174 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
9175 bool type_was_error_mark_node
= false;
9176 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
9177 bool template_type_arg
= false;
9178 bool template_parm_flag
= false;
9179 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
9180 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
9181 bool late_return_type_p
= false;
9182 bool array_parameter_p
= false;
9183 source_location saved_loc
= input_location
;
9185 tree reqs
= NULL_TREE
;
9187 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
9188 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
9189 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
9190 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
9191 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
9192 explicit_intN
= declspecs
->explicit_intN_p
;
9193 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
9195 // Was concept_p specified? Note that ds_concept
9196 // implies ds_constexpr!
9197 bool concept_p
= decl_spec_seq_has_spec_p (declspecs
, ds_concept
);
9201 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9202 type_quals
|= TYPE_QUAL_CONST
;
9203 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9204 type_quals
|= TYPE_QUAL_VOLATILE
;
9205 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9206 type_quals
|= TYPE_QUAL_RESTRICT
;
9208 if (decl_context
== FUNCDEF
)
9209 funcdef_flag
= true, decl_context
= NORMAL
;
9210 else if (decl_context
== MEMFUNCDEF
)
9211 funcdef_flag
= true, decl_context
= FIELD
;
9212 else if (decl_context
== BITFIELD
)
9213 bitfield
= 1, decl_context
= FIELD
;
9214 else if (decl_context
== TEMPLATE_TYPE_ARG
)
9215 template_type_arg
= true, decl_context
= TYPENAME
;
9216 else if (decl_context
== TPARM
)
9217 template_parm_flag
= true, decl_context
= PARM
;
9219 if (initialized
> 1)
9220 funcdef_flag
= true;
9222 /* Look inside a declarator for the name being declared
9223 and get it as a string, for an error message. */
9224 for (id_declarator
= declarator
;
9226 id_declarator
= id_declarator
->declarator
)
9228 if (id_declarator
->kind
!= cdk_id
)
9229 innermost_code
= id_declarator
->kind
;
9231 switch (id_declarator
->kind
)
9234 if (id_declarator
->declarator
9235 && id_declarator
->declarator
->kind
== cdk_id
)
9237 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
9238 if (sfk
== sfk_destructor
)
9245 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9246 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9249 if (qualifying_scope
)
9251 if (at_function_scope_p ())
9255 A declarator-id shall not be qualified except
9258 None of the cases are permitted in block
9260 if (qualifying_scope
== global_namespace
)
9261 error ("invalid use of qualified-name %<::%D%>",
9263 else if (TYPE_P (qualifying_scope
))
9264 error ("invalid use of qualified-name %<%T::%D%>",
9265 qualifying_scope
, decl
);
9267 error ("invalid use of qualified-name %<%D::%D%>",
9268 qualifying_scope
, decl
);
9269 return error_mark_node
;
9271 else if (TYPE_P (qualifying_scope
))
9273 ctype
= qualifying_scope
;
9274 if (!MAYBE_CLASS_TYPE_P (ctype
))
9276 error ("%q#T is not a class or a namespace", ctype
);
9279 else if (innermost_code
!= cdk_function
9280 && current_class_type
9281 && !uniquely_derived_from_p (ctype
,
9282 current_class_type
))
9284 error ("invalid use of qualified-name %<%T::%D%>",
9285 qualifying_scope
, decl
);
9286 return error_mark_node
;
9289 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9290 in_namespace
= qualifying_scope
;
9292 switch (TREE_CODE (decl
))
9298 if (innermost_code
!= cdk_function
)
9300 error ("declaration of %qD as non-function", decl
);
9301 return error_mark_node
;
9303 else if (!qualifying_scope
9304 && !(current_class_type
&& at_class_scope_p ()))
9306 error ("declaration of %qD as non-member", decl
);
9307 return error_mark_node
;
9310 type
= TREE_OPERAND (decl
, 0);
9312 type
= constructor_name (type
);
9313 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9318 case TEMPLATE_ID_EXPR
:
9320 tree fns
= TREE_OPERAND (decl
, 0);
9323 if (!identifier_p (dname
))
9325 if (variable_template_p (dname
))
9326 dname
= DECL_NAME (dname
);
9329 gcc_assert (is_overloaded_fn (dname
));
9330 dname
= DECL_NAME (get_first_fn (dname
));
9336 case IDENTIFIER_NODE
:
9337 if (identifier_p (decl
))
9340 if (C_IS_RESERVED_WORD (dname
))
9342 error ("declarator-id missing; using reserved word %qD",
9344 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9346 else if (!IDENTIFIER_TYPENAME_P (dname
))
9347 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9350 gcc_assert (flags
== NO_SPECIAL
);
9351 flags
= TYPENAME_FLAG
;
9352 ctor_return_type
= TREE_TYPE (dname
);
9353 sfk
= sfk_conversion
;
9354 if (is_typename_at_global_scope (dname
))
9355 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9357 name
= "<invalid operator>";
9374 return error_mark_node
;
9379 if (id_declarator
->kind
== cdk_id
)
9385 The declarator in a function-definition shall have the form
9386 D1 ( parameter-declaration-clause) ... */
9387 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9389 error ("function definition does not declare parameters");
9390 return error_mark_node
;
9393 if (flags
== TYPENAME_FLAG
9394 && innermost_code
!= cdk_function
9395 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9397 error ("declaration of %qD as non-function", dname
);
9398 return error_mark_node
;
9402 && identifier_p (dname
)
9403 && UDLIT_OPER_P (dname
)
9404 && innermost_code
!= cdk_function
)
9406 error ("declaration of %qD as non-function", dname
);
9407 return error_mark_node
;
9410 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9414 error ("declaration of %qD as %<typedef%>", dname
);
9415 return error_mark_node
;
9417 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9419 error ("declaration of %qD as parameter", dname
);
9420 return error_mark_node
;
9424 /* Anything declared one level down from the top level
9425 must be one of the parameters of a function
9426 (because the body is at least two levels down). */
9428 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9429 by not allowing C++ class definitions to specify their parameters
9430 with xdecls (must be spec.d in the parmlist).
9432 Since we now wait to push a class scope until we are sure that
9433 we are in a legitimate method context, we must set oldcname
9434 explicitly (since current_class_name is not yet alive).
9436 We also want to avoid calling this a PARM if it is in a namespace. */
9438 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9440 cp_binding_level
*b
= current_binding_level
;
9441 current_binding_level
= b
->level_chain
;
9442 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9443 decl_context
= PARM
;
9444 current_binding_level
= b
;
9448 name
= decl_context
== PARM
? "parameter" : "type name";
9450 if (concept_p
&& typedef_p
)
9452 error ("%<concept%> cannot appear in a typedef declaration");
9453 return error_mark_node
;
9456 if (constexpr_p
&& typedef_p
)
9458 error ("%<constexpr%> cannot appear in a typedef declaration");
9459 return error_mark_node
;
9462 /* If there were multiple types specified in the decl-specifier-seq,
9463 issue an error message. */
9464 if (declspecs
->multiple_types_p
)
9466 error ("two or more data types in declaration of %qs", name
);
9467 return error_mark_node
;
9470 if (declspecs
->conflicting_specifiers_p
)
9472 error ("conflicting specifiers in declaration of %qs", name
);
9473 return error_mark_node
;
9476 /* Extract the basic type from the decl-specifier-seq. */
9477 type
= declspecs
->type
;
9478 if (type
== error_mark_node
)
9481 type_was_error_mark_node
= true;
9483 /* If the entire declaration is itself tagged as deprecated then
9484 suppress reports of deprecated items. */
9485 if (type
&& TREE_DEPRECATED (type
)
9486 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9487 warn_deprecated_use (type
, NULL_TREE
);
9488 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9490 typedef_decl
= type
;
9491 type
= TREE_TYPE (typedef_decl
);
9492 if (TREE_DEPRECATED (type
)
9493 && DECL_ARTIFICIAL (typedef_decl
)
9494 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9495 warn_deprecated_use (type
, NULL_TREE
);
9497 /* No type at all: default to `int', and set DEFAULTED_INT
9498 because it was not a user-defined typedef. */
9499 if (type
== NULL_TREE
)
9501 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9503 /* These imply 'int'. */
9504 type
= integer_type_node
;
9507 /* If we just have "complex", it is equivalent to "complex double". */
9508 else if (!longlong
&& !explicit_intN
9509 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9511 type
= double_type_node
;
9512 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9513 "ISO C++ does not support plain %<complex%> meaning "
9514 "%<double complex%>");
9518 explicit_int
= declspecs
->explicit_int_p
;
9519 explicit_char
= declspecs
->explicit_char_p
;
9522 /* See the code below that used this. */
9524 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9526 typedef_type
= type
;
9529 if (sfk
!= sfk_conversion
)
9530 ctor_return_type
= ctype
;
9532 if (sfk
!= sfk_none
)
9534 type
= check_special_function_return_type (sfk
, type
,
9537 declspecs
->locations
);
9538 type_quals
= TYPE_UNQUALIFIED
;
9540 else if (type
== NULL_TREE
)
9546 /* We handle `main' specially here, because 'main () { }' is so
9547 common. With no options, it is allowed. With -Wreturn-type,
9548 it is a warning. It is only an error with -pedantic-errors. */
9549 is_main
= (funcdef_flag
9550 && dname
&& identifier_p (dname
)
9551 && MAIN_NAME_P (dname
)
9552 && ctype
== NULL_TREE
9553 && in_namespace
== NULL_TREE
9554 && current_namespace
== global_namespace
);
9556 if (type_was_error_mark_node
)
9557 /* We've already issued an error, don't complain more. */;
9558 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9559 /* Allow it, sigh. */;
9561 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9563 pedwarn (input_location
, OPT_Wpedantic
,
9564 "ISO C++ forbids declaration of %qs with no type", name
);
9566 warning (OPT_Wreturn_type
,
9567 "ISO C++ forbids declaration of %qs with no type", name
);
9569 if (type_was_error_mark_node
&& template_parm_flag
)
9570 /* FIXME we should be able to propagate the error_mark_node as is
9571 for other contexts too. */
9572 type
= error_mark_node
;
9574 type
= integer_type_node
;
9581 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9583 error ("%<__int%d%> is not supported by this target",
9584 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9585 explicit_intN
= false;
9587 else if (pedantic
&& ! in_system_header_at (input_location
))
9588 pedwarn (input_location
, OPT_Wpedantic
,
9589 "ISO C++ does not support %<__int%d%> for %qs",
9590 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9593 /* Now process the modifiers that were specified
9594 and check for invalid combinations. */
9596 /* Long double is a special combination. */
9597 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9600 type
= cp_build_qualified_type (long_double_type_node
,
9601 cp_type_quals (type
));
9604 /* Check all other uses of type modifiers. */
9606 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9610 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9611 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9612 else if (signed_p
&& unsigned_p
)
9613 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9614 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9615 error ("%<long long%> invalid for %qs", name
);
9616 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9617 error ("%<long%> invalid for %qs", name
);
9618 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9619 error ("%<short%> invalid for %qs", name
);
9620 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9621 error ("%<long%> or %<short%> invalid for %qs", name
);
9622 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9623 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9624 else if ((long_p
|| short_p
) && explicit_char
)
9625 error ("%<long%> or %<short%> specified with char for %qs", name
);
9626 else if (long_p
&& short_p
)
9627 error ("%<long%> and %<short%> specified together for %qs", name
);
9628 else if (type
== char16_type_node
|| type
== char32_type_node
)
9630 if (signed_p
|| unsigned_p
)
9631 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9632 else if (short_p
|| long_p
)
9633 error ("%<short%> or %<long%> invalid for %qs", name
);
9638 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9640 pedwarn (input_location
, OPT_Wpedantic
,
9641 "long, short, signed or unsigned used invalidly for %qs",
9643 if (flag_pedantic_errors
)
9648 /* Discard the type modifiers if they are invalid. */
9659 /* Decide whether an integer type is signed or not.
9660 Optionally treat bitfields as signed by default. */
9664 It is implementation-defined whether a plain (neither
9665 explicitly signed or unsigned) char, short, int, or long
9666 bit-field is signed or unsigned.
9668 Naturally, we extend this to long long as well. Note that
9669 this does not include wchar_t. */
9670 || (bitfield
&& !flag_signed_bitfields
9672 /* A typedef for plain `int' without `signed' can be
9673 controlled just like plain `int', but a typedef for
9674 `signed int' cannot be so controlled. */
9676 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9677 && TREE_CODE (type
) == INTEGER_TYPE
9678 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9681 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9683 type
= long_long_unsigned_type_node
;
9685 type
= long_unsigned_type_node
;
9687 type
= short_unsigned_type_node
;
9688 else if (type
== char_type_node
)
9689 type
= unsigned_char_type_node
;
9690 else if (typedef_decl
)
9691 type
= unsigned_type_for (type
);
9693 type
= unsigned_type_node
;
9695 else if (signed_p
&& type
== char_type_node
)
9696 type
= signed_char_type_node
;
9697 else if (explicit_intN
)
9698 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9700 type
= long_long_integer_type_node
;
9702 type
= long_integer_type_node
;
9704 type
= short_integer_type_node
;
9706 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9708 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9709 error ("complex invalid for %qs", name
);
9710 /* If a modifier is specified, the resulting complex is the complex
9711 form of TYPE. E.g, "complex short" is "complex short int". */
9712 else if (type
== integer_type_node
)
9713 type
= complex_integer_type_node
;
9714 else if (type
== float_type_node
)
9715 type
= complex_float_type_node
;
9716 else if (type
== double_type_node
)
9717 type
= complex_double_type_node
;
9718 else if (type
== long_double_type_node
)
9719 type
= complex_long_double_type_node
;
9721 type
= build_complex_type (type
);
9724 /* If we're using the injected-class-name to form a compound type or a
9725 declaration, replace it with the underlying class so we don't get
9726 redundant typedefs in the debug output. But if we are returning the
9727 type unchanged, leave it alone so that it's available to
9728 maybe_get_template_decl_from_type_decl. */
9729 if (CLASS_TYPE_P (type
)
9730 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9731 && type
== TREE_TYPE (TYPE_NAME (type
))
9732 && (declarator
|| type_quals
))
9733 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9735 type_quals
|= cp_type_quals (type
);
9736 type
= cp_build_qualified_type_real
9737 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9738 || declspecs
->decltype_p
)
9739 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9740 /* We might have ignored or rejected some of the qualifiers. */
9741 type_quals
= cp_type_quals (type
);
9744 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9745 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9746 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9748 storage_class
= declspecs
->storage_class
;
9749 if (storage_class
== sc_static
)
9750 staticp
= 1 + (decl_context
== FIELD
);
9752 if (virtualp
&& staticp
== 2)
9754 error ("member %qD cannot be declared both virtual and static", dname
);
9755 storage_class
= sc_none
;
9758 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9760 /* Issue errors about use of storage classes for parameters. */
9761 if (decl_context
== PARM
)
9765 error ("typedef declaration invalid in parameter declaration");
9766 return error_mark_node
;
9768 else if (template_parm_flag
&& storage_class
!= sc_none
)
9770 error ("storage class specified for template parameter %qs", name
);
9771 return error_mark_node
;
9773 else if (storage_class
== sc_static
9774 || storage_class
== sc_extern
9776 error ("storage class specifiers invalid in parameter declarations");
9778 /* Function parameters cannot be concept. */
9780 error ("a parameter cannot be declared %<concept%>");
9781 /* Function parameters cannot be constexpr. If we saw one, moan
9782 and pretend it wasn't there. */
9783 else if (constexpr_p
)
9785 error ("a parameter cannot be declared %<constexpr%>");
9790 /* Give error if `virtual' is used outside of class declaration. */
9792 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9794 error_at (declspecs
->locations
[ds_virtual
],
9795 "%<virtual%> outside class declaration");
9799 /* Static anonymous unions are dealt with here. */
9800 if (staticp
&& decl_context
== TYPENAME
9802 && ANON_AGGR_TYPE_P (declspecs
->type
))
9803 decl_context
= FIELD
;
9805 /* Warn about storage classes that are invalid for certain
9806 kinds of declarations (parameters, typenames, etc.). */
9809 && storage_class
!= sc_extern
9810 && storage_class
!= sc_static
)
9813 error ("multiple storage classes in declaration of %qs", name
);
9816 if (decl_context
!= NORMAL
9817 && ((storage_class
!= sc_none
9818 && storage_class
!= sc_mutable
)
9821 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9822 && (storage_class
== sc_register
9823 || storage_class
== sc_auto
))
9827 else if (decl_context
== FIELD
9828 /* C++ allows static class elements. */
9829 && storage_class
== sc_static
)
9830 /* C++ also allows inlines and signed and unsigned elements,
9831 but in those cases we don't come in here. */
9835 if (decl_context
== FIELD
)
9836 error ("storage class specified for %qs", name
);
9839 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9840 error ("storage class specified for parameter %qs", name
);
9842 error ("storage class specified for typename");
9844 if (storage_class
== sc_register
9845 || storage_class
== sc_auto
9846 || storage_class
== sc_extern
9848 storage_class
= sc_none
;
9851 else if (storage_class
== sc_extern
&& funcdef_flag
9852 && ! toplevel_bindings_p ())
9853 error ("nested function %qs declared %<extern%>", name
);
9854 else if (toplevel_bindings_p ())
9856 if (storage_class
== sc_auto
)
9857 error ("top-level declaration of %qs specifies %<auto%>", name
);
9860 && storage_class
!= sc_extern
9861 && storage_class
!= sc_static
)
9863 if (declspecs
->gnu_thread_keyword_p
)
9864 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9865 "declared %<__thread%>", name
);
9867 /* When thread_local is applied to a variable of block scope the
9868 storage-class-specifier static is implied if it does not appear
9870 storage_class
= declspecs
->storage_class
= sc_static
;
9874 if (storage_class
&& friendp
)
9876 error ("storage class specifiers invalid in friend function declarations");
9877 storage_class
= sc_none
;
9882 unqualified_id
= NULL_TREE
;
9885 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9886 switch (TREE_CODE (unqualified_id
))
9889 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9890 if (TYPE_P (unqualified_id
))
9891 unqualified_id
= constructor_name (unqualified_id
);
9894 case IDENTIFIER_NODE
:
9895 case TEMPLATE_ID_EXPR
:
9903 if (declspecs
->std_attributes
)
9905 /* Apply the c++11 attributes to the type preceding them. */
9906 input_location
= declspecs
->locations
[ds_std_attribute
];
9907 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9908 input_location
= saved_loc
;
9911 /* Determine the type of the entity declared by recurring on the
9913 for (; declarator
; declarator
= declarator
->declarator
)
9915 const cp_declarator
*inner_declarator
;
9918 if (type
== error_mark_node
)
9919 return error_mark_node
;
9921 attrs
= declarator
->attributes
;
9927 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9928 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9929 if (declarator
->kind
== cdk_function
)
9930 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9931 if (declarator
->kind
== cdk_array
)
9932 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9933 returned_attrs
= decl_attributes (&type
,
9934 chainon (returned_attrs
, attrs
),
9938 if (declarator
->kind
== cdk_id
)
9941 inner_declarator
= declarator
->declarator
;
9943 switch (declarator
->kind
)
9946 type
= create_array_type_for_decl (dname
, type
,
9947 declarator
->u
.array
.bounds
);
9948 if (declarator
->std_attributes
)
9951 The optional attribute-specifier-seq appertains to the
9953 returned_attrs
= chainon (returned_attrs
,
9954 declarator
->std_attributes
);
9962 /* Declaring a function type.
9963 Make sure we have a valid type for the function to return. */
9965 if (type_quals
!= TYPE_UNQUALIFIED
)
9967 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9968 warning (OPT_Wignored_qualifiers
,
9969 "type qualifiers ignored on function return type");
9970 /* We now know that the TYPE_QUALS don't apply to the
9971 decl, but to its return type. */
9972 type_quals
= TYPE_UNQUALIFIED
;
9974 errmsg
= targetm
.invalid_return_type (type
);
9978 type
= integer_type_node
;
9981 /* Error about some types functions can't return. */
9983 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9985 error ("%qs declared as function returning a function", name
);
9986 return error_mark_node
;
9988 if (TREE_CODE (type
) == ARRAY_TYPE
)
9990 error ("%qs declared as function returning an array", name
);
9991 return error_mark_node
;
9994 input_location
= declspecs
->locations
[ds_type_spec
];
9995 abstract_virtuals_error (ACU_RETURN
, type
);
9996 input_location
= saved_loc
;
9998 /* Pick up type qualifiers which should be applied to `this'. */
9999 memfn_quals
= declarator
->u
.function
.qualifiers
;
10000 /* Pick up virt-specifiers. */
10001 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
10002 /* And ref-qualifier, too */
10003 rqual
= declarator
->u
.function
.ref_qualifier
;
10004 /* And tx-qualifier. */
10005 tree tx_qual
= declarator
->u
.function
.tx_qualifier
;
10006 /* Pick up the exception specifications. */
10007 raises
= declarator
->u
.function
.exception_specification
;
10008 /* If the exception-specification is ill-formed, let's pretend
10009 there wasn't one. */
10010 if (raises
== error_mark_node
)
10011 raises
= NULL_TREE
;
10014 error_at (location_of (reqs
), "requires-clause on return type");
10015 reqs
= declarator
->u
.function
.requires_clause
;
10017 /* Say it's a definition only for the CALL_EXPR
10018 closest to the identifier. */
10019 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
10021 /* Handle a late-specified return type. */
10024 if (type_uses_auto (type
))
10026 if (!declarator
->u
.function
.late_return_type
)
10028 if (current_class_type
10029 && LAMBDA_TYPE_P (current_class_type
))
10030 /* OK for C++11 lambdas. */;
10031 else if (cxx_dialect
< cxx14
)
10033 error ("%qs function uses "
10034 "%<auto%> type specifier without trailing "
10035 "return type", name
);
10036 inform (input_location
, "deduced return type "
10037 "only available with -std=c++14 or "
10042 error ("virtual function cannot "
10043 "have deduced return type");
10047 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
10049 error ("%qs function with trailing return type has"
10050 " %qT as its type rather than plain %<auto%>",
10052 return error_mark_node
;
10055 else if (declarator
->u
.function
.late_return_type
10056 && sfk
!= sfk_conversion
)
10058 if (cxx_dialect
< cxx11
)
10059 /* Not using maybe_warn_cpp0x because this should
10060 always be an error. */
10061 error ("trailing return type only available with "
10062 "-std=c++11 or -std=gnu++11");
10064 error ("%qs function with trailing return type not "
10065 "declared with %<auto%> type specifier", name
);
10066 return error_mark_node
;
10069 type
= splice_late_return_type
10070 (type
, declarator
->u
.function
.late_return_type
);
10071 if (type
== error_mark_node
)
10072 return error_mark_node
;
10074 if (declarator
->u
.function
.late_return_type
)
10075 late_return_type_p
= true;
10077 if (ctype
== NULL_TREE
10078 && decl_context
== FIELD
10081 ctype
= current_class_type
;
10083 if (ctype
&& (sfk
== sfk_constructor
10084 || sfk
== sfk_destructor
))
10086 /* We are within a class's scope. If our declarator name
10087 is the same as the class name, and we are defining
10088 a function, then it is a constructor/destructor, and
10089 therefore returns a void type. */
10091 /* ISO C++ 12.4/2. A destructor may not be declared
10092 const or volatile. A destructor may not be static.
10093 A destructor may not be declared with ref-qualifier.
10095 ISO C++ 12.1. A constructor may not be declared
10096 const or volatile. A constructor may not be
10097 virtual. A constructor may not be static.
10098 A constructor may not be declared with ref-qualifier. */
10100 error ((flags
== DTOR_FLAG
)
10101 ? G_("destructor cannot be static member function")
10102 : G_("constructor cannot be static member function"));
10105 error ((flags
== DTOR_FLAG
)
10106 ? G_("destructors may not be cv-qualified")
10107 : G_("constructors may not be cv-qualified"));
10108 memfn_quals
= TYPE_UNQUALIFIED
;
10113 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
10114 error ((flags
== DTOR_FLAG
)
10115 ? "destructors may not be ref-qualified"
10116 : "constructors may not be ref-qualified");
10117 rqual
= REF_QUAL_NONE
;
10120 if (decl_context
== FIELD
10121 && !member_function_or_else (ctype
,
10122 current_class_type
,
10124 return error_mark_node
;
10126 if (flags
!= DTOR_FLAG
)
10128 /* It's a constructor. */
10129 if (explicitp
== 1)
10133 permerror (input_location
, "constructors cannot be declared virtual");
10136 if (decl_context
== FIELD
10137 && sfk
!= sfk_constructor
)
10138 return error_mark_node
;
10140 if (decl_context
== FIELD
)
10147 /* Cannot be both friend and virtual. */
10148 error ("virtual functions cannot be friends");
10151 if (decl_context
== NORMAL
)
10152 error ("friend declaration not in class definition");
10153 if (current_function_decl
&& funcdef_flag
)
10154 error ("can%'t define friend function %qs in a local "
10155 "class definition",
10158 else if (ctype
&& sfk
== sfk_conversion
)
10160 if (explicitp
== 1)
10162 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
10165 if (late_return_type_p
)
10166 error ("a conversion function cannot have a trailing return type");
10169 arg_types
= grokparms (declarator
->u
.function
.parameters
,
10172 if (inner_declarator
10173 && inner_declarator
->kind
== cdk_id
10174 && inner_declarator
->u
.id
.sfk
== sfk_destructor
10175 && arg_types
!= void_list_node
)
10177 error ("destructors may not have parameters");
10178 arg_types
= void_list_node
;
10182 type
= build_function_type (type
, arg_types
);
10184 tree attrs
= declarator
->std_attributes
;
10187 tree att
= build_tree_list (tx_qual
, NULL_TREE
);
10188 /* transaction_safe applies to the type, but
10189 transaction_safe_dynamic applies to the function. */
10190 if (is_attribute_p ("transaction_safe", tx_qual
))
10191 attrs
= chainon (attrs
, att
);
10193 returned_attrs
= chainon (returned_attrs
, att
);
10198 The optional attribute-specifier-seq appertains to
10199 the function type. */
10200 decl_attributes (&type
, attrs
, 0);
10205 case cdk_reference
:
10207 /* Filter out pointers-to-references and references-to-references.
10208 We can get these if a TYPE_DECL is used. */
10210 if (TREE_CODE (type
) == REFERENCE_TYPE
)
10212 if (declarator
->kind
!= cdk_reference
)
10214 error ("cannot declare pointer to %q#T", type
);
10215 type
= TREE_TYPE (type
);
10218 /* In C++0x, we allow reference to reference declarations
10219 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
10220 and template type arguments [14.3.1/4 temp.arg.type]. The
10221 check for direct reference to reference declarations, which
10222 are still forbidden, occurs below. Reasoning behind the change
10223 can be found in DR106, DR540, and the rvalue reference
10225 else if (cxx_dialect
== cxx98
)
10227 error ("cannot declare reference to %q#T", type
);
10228 type
= TREE_TYPE (type
);
10231 else if (VOID_TYPE_P (type
))
10233 if (declarator
->kind
== cdk_reference
)
10234 error ("cannot declare reference to %q#T", type
);
10235 else if (declarator
->kind
== cdk_ptrmem
)
10236 error ("cannot declare pointer to %q#T member", type
);
10239 /* We now know that the TYPE_QUALS don't apply to the decl,
10240 but to the target of the pointer. */
10241 type_quals
= TYPE_UNQUALIFIED
;
10243 /* This code used to handle METHOD_TYPE, but I don't think it's
10244 possible to get it here anymore. */
10245 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
10246 if (declarator
->kind
== cdk_ptrmem
10247 && TREE_CODE (type
) == FUNCTION_TYPE
)
10249 memfn_quals
|= type_memfn_quals (type
);
10250 type
= build_memfn_type (type
,
10251 declarator
->u
.pointer
.class_type
,
10254 if (type
== error_mark_node
)
10255 return error_mark_node
;
10257 rqual
= REF_QUAL_NONE
;
10258 memfn_quals
= TYPE_UNQUALIFIED
;
10261 if (TREE_CODE (type
) == FUNCTION_TYPE
10262 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10263 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
10264 error (declarator
->kind
== cdk_reference
10265 ? G_("cannot declare reference to qualified function type %qT")
10266 : G_("cannot declare pointer to qualified function type %qT"),
10269 /* When the pointed-to type involves components of variable size,
10270 care must be taken to ensure that the size evaluation code is
10271 emitted early enough to dominate all the possible later uses
10272 and late enough for the variables on which it depends to have
10275 This is expected to happen automatically when the pointed-to
10276 type has a name/declaration of it's own, but special attention
10277 is required if the type is anonymous.
10279 We handle the NORMAL and FIELD contexts here by inserting a
10280 dummy statement that just evaluates the size at a safe point
10281 and ensures it is not deferred until e.g. within a deeper
10282 conditional context (c++/43555).
10284 We expect nothing to be needed here for PARM or TYPENAME.
10285 Evaluating the size at this point for TYPENAME would
10286 actually be incorrect, as we might be in the middle of an
10287 expression with side effects on the pointed-to type size
10288 "arguments" prior to the pointer declaration point and the
10289 size evaluation could end up prior to the side effects. */
10291 if (!TYPE_NAME (type
)
10292 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10293 && at_function_scope_p ()
10294 && variably_modified_type_p (type
, NULL_TREE
))
10295 /* Force evaluation of the SAVE_EXPR. */
10296 finish_expr_stmt (TYPE_SIZE (type
));
10298 if (declarator
->kind
== cdk_reference
)
10300 /* In C++0x, the type we are creating a reference to might be
10301 a typedef which is itself a reference type. In that case,
10302 we follow the reference collapsing rules in
10303 [7.1.3/8 dcl.typedef] to create the final reference type:
10305 "If a typedef TD names a type that is a reference to a type
10306 T, an attempt to create the type 'lvalue reference to cv TD'
10307 creates the type 'lvalue reference to T,' while an attempt
10308 to create the type "rvalue reference to cv TD' creates the
10311 if (VOID_TYPE_P (type
))
10312 /* We already gave an error. */;
10313 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10315 if (declarator
->u
.reference
.rvalue_ref
)
10316 /* Leave type alone. */;
10318 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10321 type
= cp_build_reference_type
10322 (type
, declarator
->u
.reference
.rvalue_ref
);
10324 /* In C++0x, we need this check for direct reference to
10325 reference declarations, which are forbidden by
10326 [8.3.2/5 dcl.ref]. Reference to reference declarations
10327 are only allowed indirectly through typedefs and template
10328 type arguments. Example:
10330 void foo(int & &); // invalid ref-to-ref decl
10332 typedef int & int_ref;
10333 void foo(int_ref &); // valid ref-to-ref decl
10335 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10336 error ("cannot declare reference to %q#T, which is not "
10337 "a typedef or a template type argument", type
);
10339 else if (TREE_CODE (type
) == METHOD_TYPE
)
10340 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10341 else if (declarator
->kind
== cdk_ptrmem
)
10343 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10344 != NAMESPACE_DECL
);
10345 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10346 /* We will already have complained. */
10347 type
= error_mark_node
;
10349 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10353 type
= build_pointer_type (type
);
10355 /* Process a list of type modifier keywords (such as
10356 const or volatile) that were given inside the `*' or `&'. */
10358 if (declarator
->u
.pointer
.qualifiers
)
10361 = cp_build_qualified_type (type
,
10362 declarator
->u
.pointer
.qualifiers
);
10363 type_quals
= cp_type_quals (type
);
10366 /* Apply C++11 attributes to the pointer, and not to the
10367 type pointed to. This is unlike what is done for GNU
10368 attributes above. It is to comply with [dcl.ptr]/1:
10370 [the optional attribute-specifier-seq (7.6.1) appertains
10371 to the pointer and not to the object pointed to]. */
10372 if (declarator
->std_attributes
)
10373 decl_attributes (&type
, declarator
->std_attributes
,
10383 gcc_unreachable ();
10387 /* A `constexpr' specifier used in an object declaration declares
10388 the object as `const'. */
10389 if (constexpr_p
&& innermost_code
!= cdk_function
)
10391 /* DR1688 says that a `constexpr' specifier in combination with
10392 `volatile' is valid. */
10394 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10396 type_quals
|= TYPE_QUAL_CONST
;
10397 type
= cp_build_qualified_type (type
, type_quals
);
10401 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10402 && TREE_CODE (type
) != FUNCTION_TYPE
10403 && TREE_CODE (type
) != METHOD_TYPE
10404 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10406 error ("template-id %qD used as a declarator",
10408 unqualified_id
= dname
;
10411 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10412 qualified with a class-name, turn it into a METHOD_TYPE, unless
10413 we know that the function is static. We take advantage of this
10414 opportunity to do other processing that pertains to entities
10415 explicitly declared to be class members. Note that if DECLARATOR
10416 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10417 would not have exited the loop above. */
10419 && declarator
->u
.id
.qualifying_scope
10420 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10422 ctype
= declarator
->u
.id
.qualifying_scope
;
10423 ctype
= TYPE_MAIN_VARIANT (ctype
);
10424 template_count
= num_template_headers_for_class (ctype
);
10426 if (ctype
== current_class_type
)
10430 permerror (input_location
, "member functions are implicitly friends of their class");
10434 permerror (declarator
->id_loc
,
10435 "extra qualification %<%T::%> on member %qs",
10438 else if (/* If the qualifying type is already complete, then we
10439 can skip the following checks. */
10440 !COMPLETE_TYPE_P (ctype
)
10441 && (/* If the function is being defined, then
10442 qualifying type must certainly be complete. */
10444 /* A friend declaration of "T::f" is OK, even if
10445 "T" is a template parameter. But, if this
10446 function is not a friend, the qualifying type
10447 must be a class. */
10448 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10449 /* For a declaration, the type need not be
10450 complete, if either it is dependent (since there
10451 is no meaningful definition of complete in that
10452 case) or the qualifying class is currently being
10454 || !(dependent_type_p (ctype
)
10455 || currently_open_class (ctype
)))
10456 /* Check that the qualifying type is complete. */
10457 && !complete_type_or_else (ctype
, NULL_TREE
))
10458 return error_mark_node
;
10459 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10461 if (current_class_type
10462 && (!friendp
|| funcdef_flag
))
10464 error (funcdef_flag
10465 ? G_("cannot define member function %<%T::%s%> "
10467 : G_("cannot declare member function %<%T::%s%> "
10469 ctype
, name
, current_class_type
);
10470 return error_mark_node
;
10473 else if (typedef_p
&& current_class_type
)
10475 error ("cannot declare member %<%T::%s%> within %qT",
10476 ctype
, name
, current_class_type
);
10477 return error_mark_node
;
10481 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10482 ctype
= current_class_type
;
10484 /* Now TYPE has the actual type. */
10486 if (returned_attrs
)
10489 *attrlist
= chainon (returned_attrs
, *attrlist
);
10491 attrlist
= &returned_attrs
;
10495 && declarator
->kind
== cdk_id
10496 && declarator
->std_attributes
)
10497 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10498 a declarator-id appertains to the entity that is declared. */
10499 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10501 /* Handle parameter packs. */
10502 if (parameter_pack_p
)
10504 if (decl_context
== PARM
)
10505 /* Turn the type into a pack expansion.*/
10506 type
= make_pack_expansion (type
);
10508 error ("non-parameter %qs cannot be a parameter pack", name
);
10511 /* Did array size calculations overflow or does the array cover more
10512 than half of the address-space? */
10513 if (TREE_CODE (type
) == ARRAY_TYPE
10514 && COMPLETE_TYPE_P (type
)
10515 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10516 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10518 error ("size of array %qs is too large", name
);
10519 /* If we proceed with the array type as it is, we'll eventually
10520 crash in tree_to_[su]hwi(). */
10521 type
= error_mark_node
;
10524 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10525 && !processing_template_decl
10526 && variably_modified_type_p (type
, NULL_TREE
))
10528 if (decl_context
== FIELD
)
10529 error ("data member may not have variably modified type %qT", type
);
10531 error ("parameter may not have variably modified type %qT", type
);
10532 type
= error_mark_node
;
10535 if (explicitp
== 1 || (explicitp
&& friendp
))
10537 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10538 in the declaration of a constructor or conversion function within
10539 a class definition. */
10540 if (!current_class_type
)
10541 error_at (declspecs
->locations
[ds_explicit
],
10542 "%<explicit%> outside class declaration");
10544 error_at (declspecs
->locations
[ds_explicit
],
10545 "%<explicit%> in friend declaration");
10547 error_at (declspecs
->locations
[ds_explicit
],
10548 "only declarations of constructors and conversion operators "
10549 "can be %<explicit%>");
10553 if (storage_class
== sc_mutable
)
10555 if (decl_context
!= FIELD
|| friendp
)
10557 error ("non-member %qs cannot be declared %<mutable%>", name
);
10558 storage_class
= sc_none
;
10560 else if (decl_context
== TYPENAME
|| typedef_p
)
10562 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10563 storage_class
= sc_none
;
10565 else if (TREE_CODE (type
) == FUNCTION_TYPE
10566 || TREE_CODE (type
) == METHOD_TYPE
)
10568 error ("function %qs cannot be declared %<mutable%>", name
);
10569 storage_class
= sc_none
;
10573 error ("static %qs cannot be declared %<mutable%>", name
);
10574 storage_class
= sc_none
;
10576 else if (type_quals
& TYPE_QUAL_CONST
)
10578 error ("const %qs cannot be declared %<mutable%>", name
);
10579 storage_class
= sc_none
;
10581 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10583 permerror (input_location
, "reference %qs cannot be declared "
10584 "%<mutable%>", name
);
10585 storage_class
= sc_none
;
10589 /* If this is declaring a typedef name, return a TYPE_DECL. */
10590 if (typedef_p
&& decl_context
!= TYPENAME
)
10594 /* Note that the grammar rejects storage classes
10595 in typenames, fields or parameters. */
10596 if (current_lang_name
== lang_name_java
)
10597 TYPE_FOR_JAVA (type
) = 1;
10599 /* This declaration:
10601 typedef void f(int) const;
10603 declares a function type which is not a member of any
10604 particular class, but which is cv-qualified; for
10605 example "f S::*" declares a pointer to a const-qualified
10606 member function of S. We record the cv-qualification in the
10608 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10610 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10612 /* We have now dealt with these qualifiers. */
10613 memfn_quals
= TYPE_UNQUALIFIED
;
10614 rqual
= REF_QUAL_NONE
;
10617 if (type_uses_auto (type
))
10619 error ("typedef declared %<auto%>");
10620 type
= error_mark_node
;
10624 error_at (location_of (reqs
), "requires-clause on typedef");
10626 if (decl_context
== FIELD
)
10627 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10629 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10630 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10631 error_at (DECL_SOURCE_LOCATION (decl
),
10632 "typedef name may not be a nested-name-specifier");
10633 TREE_TYPE (decl
) = error_mark_node
;
10636 if (decl_context
!= FIELD
)
10638 if (!current_function_decl
)
10639 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10640 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10641 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10642 (current_function_decl
)))
10643 /* The TYPE_DECL is "abstract" because there will be
10644 clones of this constructor/destructor, and there will
10645 be copies of this TYPE_DECL generated in those
10646 clones. The decloning optimization (for space) may
10647 revert this subsequently if it determines that
10648 the clones should share a common implementation. */
10649 DECL_ABSTRACT_P (decl
) = true;
10651 else if (current_class_type
10652 && constructor_name_p (unqualified_id
, current_class_type
))
10653 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10654 "as enclosing class",
10657 /* If the user declares "typedef struct {...} foo" then the
10658 struct will have an anonymous name. Fill that name in now.
10659 Nothing can refer to it, so nothing needs know about the name
10661 if (type
!= error_mark_node
10663 && TYPE_NAME (type
)
10664 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10665 && TYPE_ANONYMOUS_P (type
)
10666 && declspecs
->type_definition_p
10667 && attributes_naming_typedef_ok (*attrlist
)
10668 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10672 /* Replace the anonymous name with the real name everywhere. */
10673 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10675 if (anon_aggrname_p (TYPE_IDENTIFIER (t
)))
10676 /* We do not rename the debug info representing the
10677 anonymous tagged type because the standard says in
10678 [dcl.typedef] that the naming applies only for
10679 linkage purposes. */
10680 /*debug_hooks->set_name (t, decl);*/
10681 TYPE_NAME (t
) = decl
;
10684 if (TYPE_LANG_SPECIFIC (type
))
10685 TYPE_WAS_ANONYMOUS (type
) = 1;
10687 /* If this is a typedef within a template class, the nested
10688 type is a (non-primary) template. The name for the
10689 template needs updating as well. */
10690 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10691 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10692 = TYPE_IDENTIFIER (type
);
10694 /* Adjust linkage now that we aren't anonymous anymore. */
10695 reset_type_linkage (type
);
10697 /* FIXME remangle member functions; member functions of a
10698 type with external linkage have external linkage. */
10702 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10703 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10705 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10706 memfn_quals
!= TYPE_UNQUALIFIED
,
10707 inlinep
, friendp
, raises
!= NULL_TREE
);
10709 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10710 /* Acknowledge that this was written:
10711 `using analias = atype;'. */
10712 TYPE_DECL_ALIAS_P (decl
) = 1;
10717 /* Detect the case of an array type of unspecified size
10718 which came, as such, direct from a typedef name.
10719 We must copy the type, so that the array's domain can be
10720 individually set by the object's initializer. */
10722 if (type
&& typedef_type
10723 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10724 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10725 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10727 /* Detect where we're using a typedef of function type to declare a
10728 function. PARMS will not be set, so we must create it now. */
10730 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10732 tree decls
= NULL_TREE
;
10735 for (args
= TYPE_ARG_TYPES (type
);
10736 args
&& args
!= void_list_node
;
10737 args
= TREE_CHAIN (args
))
10739 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10741 DECL_CHAIN (decl
) = decls
;
10745 parms
= nreverse (decls
);
10747 if (decl_context
!= TYPENAME
)
10749 /* The qualifiers on the function type become the qualifiers on
10750 the non-static member function. */
10751 memfn_quals
|= type_memfn_quals (type
);
10752 rqual
= type_memfn_rqual (type
);
10753 type_quals
= TYPE_UNQUALIFIED
;
10757 /* If this is a type name (such as, in a cast or sizeof),
10758 compute the type and return it now. */
10760 if (decl_context
== TYPENAME
)
10762 /* Note that here we don't care about type_quals. */
10764 /* Special case: "friend class foo" looks like a TYPENAME context. */
10769 error ("%<inline%> specified for friend class declaration");
10775 /* Don't allow friend declaration without a class-key. */
10776 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10777 permerror (input_location
, "template parameters cannot be friends");
10778 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10779 permerror (input_location
, "friend declaration requires class-key, "
10780 "i.e. %<friend class %T::%D%>",
10781 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10783 permerror (input_location
, "friend declaration requires class-key, "
10784 "i.e. %<friend %#T%>",
10788 /* Only try to do this stuff if we didn't already give up. */
10789 if (type
!= integer_type_node
)
10791 /* A friendly class? */
10792 if (current_class_type
)
10793 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10794 /*complain=*/true);
10796 error ("trying to make class %qT a friend of global scope",
10799 type
= void_type_node
;
10802 else if (memfn_quals
|| rqual
)
10804 if (ctype
== NULL_TREE
10805 && TREE_CODE (type
) == METHOD_TYPE
)
10806 ctype
= TYPE_METHOD_BASETYPE (type
);
10809 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10810 /* Core issue #547: need to allow this in template type args.
10811 Allow it in general in C++11 for alias-declarations. */
10812 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10813 && TREE_CODE (type
) == FUNCTION_TYPE
)
10814 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10816 error ("invalid qualifiers on non-member function type");
10820 error_at (location_of (reqs
), "requires-clause on type-id");
10824 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10825 && decl_context
!= CATCHPARM
10826 && TREE_CODE (type
) != UNION_TYPE
10829 error ("abstract declarator %qT used as declaration", type
);
10830 return error_mark_node
;
10833 /* Only functions may be declared using an operator-function-id. */
10835 && IDENTIFIER_OPNAME_P (unqualified_id
)
10836 && TREE_CODE (type
) != FUNCTION_TYPE
10837 && TREE_CODE (type
) != METHOD_TYPE
)
10839 error ("declaration of %qD as non-function", unqualified_id
);
10840 return error_mark_node
;
10844 && TREE_CODE (type
) != FUNCTION_TYPE
10845 && TREE_CODE (type
) != METHOD_TYPE
)
10846 error_at (location_of (reqs
),
10847 "requires-clause on declaration of non-function type %qT",
10850 /* We don't check parameter types here because we can emit a better
10851 error message later. */
10852 if (decl_context
!= PARM
)
10854 type
= check_var_type (unqualified_id
, type
);
10855 if (type
== error_mark_node
)
10856 return error_mark_node
;
10859 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10860 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10862 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10864 if (ctype
|| in_namespace
)
10865 error ("cannot use %<::%> in parameter declaration");
10867 if (type_uses_auto (type
))
10869 if (cxx_dialect
>= cxx14
)
10870 error ("%<auto%> parameter not permitted in this context");
10872 error ("parameter declared %<auto%>");
10873 type
= error_mark_node
;
10876 /* A parameter declared as an array of T is really a pointer to T.
10877 One declared as a function is really a pointer to a function.
10878 One declared as a member is really a pointer to member. */
10880 if (TREE_CODE (type
) == ARRAY_TYPE
)
10882 /* Transfer const-ness of array into that of type pointed to. */
10883 type
= build_pointer_type (TREE_TYPE (type
));
10884 type_quals
= TYPE_UNQUALIFIED
;
10885 array_parameter_p
= true;
10887 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10888 type
= build_pointer_type (type
);
10891 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10892 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10894 cp_cv_quals real_quals
= memfn_quals
;
10895 if (cxx_dialect
< cxx14
&& constexpr_p
10896 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10897 real_quals
|= TYPE_QUAL_CONST
;
10898 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10904 if (decl_context
== PARM
)
10906 decl
= cp_build_parm_decl (unqualified_id
, type
);
10907 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10909 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10910 memfn_quals
!= TYPE_UNQUALIFIED
,
10911 inlinep
, friendp
, raises
!= NULL_TREE
);
10913 else if (decl_context
== FIELD
)
10915 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10916 && type_uses_auto (type
))
10918 error ("non-static data member declared %<auto%>");
10919 type
= error_mark_node
;
10922 /* The C99 flexible array extension. */
10923 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10924 && TYPE_DOMAIN (type
) == NULL_TREE
)
10926 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10927 tf_warning_or_error
);
10928 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10931 if (type
== error_mark_node
)
10933 /* Happens when declaring arrays of sizes which
10934 are error_mark_node, for example. */
10937 else if (in_namespace
&& !friendp
)
10939 /* Something like struct S { int N::j; }; */
10940 error ("invalid use of %<::%>");
10941 return error_mark_node
;
10943 else if (TREE_CODE (type
) == FUNCTION_TYPE
10944 || TREE_CODE (type
) == METHOD_TYPE
)
10947 tree function_context
;
10951 /* This should never happen in pure C++ (the check
10952 could be an assert). It could happen in
10953 Objective-C++ if someone writes invalid code that
10954 uses a function declaration for an instance
10955 variable or property (instance variables and
10956 properties are parsed as FIELD_DECLs, but they are
10957 part of an Objective-C class, not a C++ class).
10958 That code is invalid and is caught by this
10962 error ("declaration of function %qD in invalid context",
10964 return error_mark_node
;
10967 /* ``A union may [ ... ] not [ have ] virtual functions.''
10969 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10971 error ("function %qD declared virtual inside a union",
10973 return error_mark_node
;
10976 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10980 error ("%qD cannot be declared virtual, since it "
10981 "is always static",
10988 /* Check that the name used for a destructor makes sense. */
10989 if (sfk
== sfk_destructor
)
10991 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10995 gcc_assert (friendp
);
10996 error ("expected qualified name in friend declaration "
10997 "for destructor %qD", uqname
);
10998 return error_mark_node
;
11001 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
11003 error ("declaration of %qD as member of %qT",
11005 return error_mark_node
;
11009 error ("a destructor cannot be %<concept%>");
11010 return error_mark_node
;
11014 error ("a destructor cannot be %<constexpr%>");
11015 return error_mark_node
;
11018 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
11020 error ("expected qualified name in friend declaration "
11021 "for constructor %qD",
11022 id_declarator
->u
.id
.unqualified_name
);
11023 return error_mark_node
;
11025 if (sfk
== sfk_constructor
)
11028 error ("a constructor cannot be %<concept%>");
11029 return error_mark_node
;
11033 error ("a concept cannot be a member function");
11037 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
11039 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
11040 if (variable_template_p (tmpl
))
11042 error ("specialization of variable template %qD "
11043 "declared as function", tmpl
);
11044 inform (DECL_SOURCE_LOCATION (tmpl
),
11045 "variable template declared here");
11046 return error_mark_node
;
11050 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11051 function_context
= (ctype
!= NULL_TREE
) ?
11052 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
11053 publicp
= (! friendp
|| ! staticp
)
11054 && function_context
== NULL_TREE
;
11056 if (late_return_type_p
)
11057 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11059 decl
= grokfndecl (ctype
, type
,
11060 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
11061 ? unqualified_id
: dname
,
11065 virtualp
, flags
, memfn_quals
, rqual
, raises
,
11066 friendp
? -1 : 0, friendp
, publicp
,
11067 inlinep
| (2 * constexpr_p
) | (4 * concept_p
),
11068 initialized
== SD_DELETED
, sfk
,
11069 funcdef_flag
, template_count
, in_namespace
,
11070 attrlist
, declarator
->id_loc
);
11071 decl
= set_virt_specifiers (decl
, virt_specifiers
);
11072 if (decl
== NULL_TREE
)
11073 return error_mark_node
;
11075 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11076 /* The decl and setting of decl_attr is also turned off. */
11077 decl
= build_decl_attribute_variant (decl
, decl_attr
);
11080 /* [class.conv.ctor]
11082 A constructor declared without the function-specifier
11083 explicit that can be called with a single parameter
11084 specifies a conversion from the type of its first
11085 parameter to the type of its class. Such a constructor
11086 is called a converting constructor. */
11087 if (explicitp
== 2)
11088 DECL_NONCONVERTING_P (decl
) = 1;
11090 else if (!staticp
&& !dependent_type_p (type
)
11091 && !COMPLETE_TYPE_P (complete_type (type
))
11092 && (TREE_CODE (type
) != ARRAY_TYPE
11093 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
11094 || initialized
== 0))
11096 if (unqualified_id
)
11098 error ("field %qD has incomplete type %qT",
11099 unqualified_id
, type
);
11100 cxx_incomplete_type_inform (strip_array_types (type
));
11103 error ("name %qT has incomplete type", type
);
11105 type
= error_mark_node
;
11112 error ("%qE is neither function nor member function; "
11113 "cannot be declared friend", unqualified_id
);
11121 /* Friends are treated specially. */
11122 if (ctype
== current_class_type
)
11123 ; /* We already issued a permerror. */
11124 else if (decl
&& DECL_NAME (decl
))
11126 if (template_class_depth (current_class_type
) == 0)
11128 decl
= check_explicit_specialization
11129 (unqualified_id
, decl
, template_count
,
11130 2 * funcdef_flag
+ 4);
11131 if (decl
== error_mark_node
)
11132 return error_mark_node
;
11135 decl
= do_friend (ctype
, unqualified_id
, decl
,
11141 return error_mark_node
;
11144 /* Structure field. It may not be a function, except for C++. */
11146 if (decl
== NULL_TREE
)
11150 /* C++ allows static class members. All other work
11151 for this is done by grokfield. */
11152 decl
= build_lang_decl_loc (declarator
11153 ? declarator
->id_loc
11155 VAR_DECL
, unqualified_id
, type
);
11156 set_linkage_for_static_data_member (decl
);
11157 /* Even if there is an in-class initialization, DECL
11158 is considered undefined until an out-of-class
11159 definition is provided. */
11160 DECL_EXTERNAL (decl
) = 1;
11164 CP_DECL_THREAD_LOCAL_P (decl
) = true;
11165 if (!processing_template_decl
)
11166 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
11167 if (declspecs
->gnu_thread_keyword_p
)
11168 SET_DECL_GNU_TLS_P (decl
);
11171 error ("static data member %qE declared %<concept%>",
11173 else if (constexpr_p
&& !initialized
)
11175 error ("constexpr static data member %qD must have an "
11176 "initializer", decl
);
11177 constexpr_p
= false;
11183 error ("non-static data member %qE declared %<concept%>",
11185 else if (constexpr_p
)
11187 error ("non-static data member %qE declared %<constexpr%>",
11189 constexpr_p
= false;
11191 decl
= build_decl (input_location
,
11192 FIELD_DECL
, unqualified_id
, type
);
11193 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
11194 if (bitfield
&& !unqualified_id
)
11195 TREE_NO_WARNING (decl
) = 1;
11197 if (storage_class
== sc_mutable
)
11199 DECL_MUTABLE_P (decl
) = 1;
11200 storage_class
= sc_none
;
11205 /* An attempt is being made to initialize a non-static
11206 member. This is new in C++11. */
11207 maybe_warn_cpp0x (CPP0X_NSDMI
);
11209 /* If this has been parsed with static storage class, but
11210 errors forced staticp to be cleared, ensure NSDMI is
11212 if (declspecs
->storage_class
== sc_static
)
11213 DECL_INITIAL (decl
) = error_mark_node
;
11217 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
11218 memfn_quals
!= TYPE_UNQUALIFIED
,
11219 inlinep
, friendp
, raises
!= NULL_TREE
);
11222 else if (TREE_CODE (type
) == FUNCTION_TYPE
11223 || TREE_CODE (type
) == METHOD_TYPE
)
11225 tree original_name
;
11228 if (!unqualified_id
)
11229 return error_mark_node
;
11231 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
11232 original_name
= dname
;
11234 original_name
= unqualified_id
;
11236 if (storage_class
== sc_auto
)
11237 error ("storage class %<auto%> invalid for function %qs", name
);
11238 else if (storage_class
== sc_register
)
11239 error ("storage class %<register%> invalid for function %qs", name
);
11242 if (declspecs
->gnu_thread_keyword_p
)
11243 error ("storage class %<__thread%> invalid for function %qs",
11246 error ("storage class %<thread_local%> invalid for function %qs",
11250 if (virt_specifiers
)
11251 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
11252 /* Function declaration not at top level.
11253 Storage classes other than `extern' are not allowed
11254 and `extern' makes no difference. */
11255 if (! toplevel_bindings_p ()
11256 && (storage_class
== sc_static
11257 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
11260 if (storage_class
== sc_static
)
11261 pedwarn (input_location
, OPT_Wpedantic
,
11262 "%<static%> specified invalid for function %qs "
11263 "declared out of global scope", name
);
11265 pedwarn (input_location
, OPT_Wpedantic
,
11266 "%<inline%> specifier invalid for function %qs "
11267 "declared out of global scope", name
);
11270 if (ctype
== NULL_TREE
)
11274 error ("virtual non-class function %qs", name
);
11277 else if (sfk
== sfk_constructor
11278 || sfk
== sfk_destructor
)
11280 error (funcdef_flag
11281 ? G_("%qs defined in a non-class scope")
11282 : G_("%qs declared in a non-class scope"), name
);
11287 /* Record whether the function is public. */
11288 publicp
= (ctype
!= NULL_TREE
11289 || storage_class
!= sc_static
);
11291 if (late_return_type_p
)
11292 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11294 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
11295 reqs
, virtualp
, flags
, memfn_quals
, rqual
, raises
,
11298 inlinep
| (2 * constexpr_p
) | (4 * concept_p
),
11299 initialized
== SD_DELETED
,
11302 template_count
, in_namespace
, attrlist
,
11303 declarator
->id_loc
);
11304 if (decl
== NULL_TREE
)
11305 return error_mark_node
;
11309 int invalid_static
= 0;
11311 /* Don't allow a static member function in a class, and forbid
11312 declaring main to be static. */
11313 if (TREE_CODE (type
) == METHOD_TYPE
)
11315 permerror (input_location
, "cannot declare member function %qD to have "
11316 "static linkage", decl
);
11317 invalid_static
= 1;
11319 else if (current_function_decl
)
11321 /* FIXME need arm citation */
11322 error ("cannot declare static function inside another function");
11323 invalid_static
= 1;
11326 if (invalid_static
)
11329 storage_class
= sc_none
;
11335 /* It's a variable. */
11337 /* An uninitialized decl with `extern' is a reference. */
11338 decl
= grokvardecl (type
, dname
, unqualified_id
,
11341 ((type_quals
& TYPE_QUAL_CONST
) != 0) | (2 * concept_p
),
11343 ctype
? ctype
: in_namespace
);
11344 if (decl
== NULL_TREE
)
11345 return error_mark_node
;
11347 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11348 memfn_quals
!= TYPE_UNQUALIFIED
,
11349 inlinep
, friendp
, raises
!= NULL_TREE
);
11353 DECL_CONTEXT (decl
) = ctype
;
11356 permerror (input_location
, "%<static%> may not be used when defining "
11357 "(as opposed to declaring) a static data member");
11359 storage_class
= sc_none
;
11361 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11363 error ("static member %qD declared %<register%>", decl
);
11364 storage_class
= sc_none
;
11366 if (storage_class
== sc_extern
&& pedantic
)
11368 pedwarn (input_location
, OPT_Wpedantic
,
11369 "cannot explicitly declare member %q#D to have "
11370 "extern linkage", decl
);
11371 storage_class
= sc_none
;
11374 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11376 error ("declaration of constexpr variable %qD is not a definition",
11378 constexpr_p
= false;
11382 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11384 if (toplevel_bindings_p ())
11386 /* It's common practice (and completely valid) to have a const
11387 be initialized and declared extern. */
11388 if (!(type_quals
& TYPE_QUAL_CONST
))
11389 warning (0, "%qs initialized and declared %<extern%>", name
);
11393 error ("%qs has both %<extern%> and initializer", name
);
11394 return error_mark_node
;
11398 /* Record `register' declaration for warnings on &
11399 and in case doing stupid register allocation. */
11401 if (storage_class
== sc_register
)
11402 DECL_REGISTER (decl
) = 1;
11403 else if (storage_class
== sc_extern
)
11404 DECL_THIS_EXTERN (decl
) = 1;
11405 else if (storage_class
== sc_static
)
11406 DECL_THIS_STATIC (decl
) = 1;
11408 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11409 if (constexpr_p
&& VAR_P (decl
))
11410 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11412 /* Record constancy and volatility on the DECL itself . There's
11413 no need to do this when processing a template; we'll do this
11414 for the instantiated declaration based on the type of DECL. */
11415 if (!processing_template_decl
)
11416 cp_apply_type_quals_to_decl (type_quals
, decl
);
11422 /* Subroutine of start_function. Ensure that each of the parameter
11423 types (as listed in PARMS) is complete, as is required for a
11424 function definition. */
11427 require_complete_types_for_parms (tree parms
)
11429 for (; parms
; parms
= DECL_CHAIN (parms
))
11431 if (dependent_type_p (TREE_TYPE (parms
)))
11433 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11434 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11436 relayout_decl (parms
);
11437 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11440 /* grokparms or complete_type_or_else will have already issued
11442 TREE_TYPE (parms
) = error_mark_node
;
11446 /* Returns nonzero if T is a local variable. */
11449 local_variable_p (const_tree t
)
11452 /* A VAR_DECL with a context that is a _TYPE is a static data
11454 && !TYPE_P (CP_DECL_CONTEXT (t
))
11455 /* Any other non-local variable must be at namespace scope. */
11456 && !DECL_NAMESPACE_SCOPE_P (t
))
11457 || (TREE_CODE (t
) == PARM_DECL
))
11463 /* Like local_variable_p, but suitable for use as a tree-walking
11467 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11470 if (local_variable_p (*tp
)
11471 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11473 else if (TYPE_P (*tp
))
11474 *walk_subtrees
= 0;
11479 /* Check that ARG, which is a default-argument expression for a
11480 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11481 something goes wrong. DECL may also be a _TYPE node, rather than a
11482 DECL, if there is no DECL available. */
11485 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11490 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11491 /* We get a DEFAULT_ARG when looking at an in-class declaration
11492 with a default argument. Ignore the argument for now; we'll
11493 deal with it after the class is complete. */
11502 decl_type
= TREE_TYPE (decl
);
11504 if (arg
== error_mark_node
11505 || decl
== error_mark_node
11506 || TREE_TYPE (arg
) == error_mark_node
11507 || decl_type
== error_mark_node
)
11508 /* Something already went wrong. There's no need to check
11510 return error_mark_node
;
11512 /* [dcl.fct.default]
11514 A default argument expression is implicitly converted to the
11516 ++cp_unevaluated_operand
;
11517 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11519 --cp_unevaluated_operand
;
11521 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11523 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11524 && null_ptr_cst_p (arg
))
11525 return nullptr_node
;
11527 /* [dcl.fct.default]
11529 Local variables shall not be used in default argument
11532 The keyword `this' shall not be used in a default argument of a
11533 member function. */
11534 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11537 if (complain
& tf_warning_or_error
)
11539 if (DECL_NAME (var
) == this_identifier
)
11540 permerror (input_location
, "default argument %qE uses %qD",
11543 error ("default argument %qE uses local variable %qD", arg
, var
);
11545 return error_mark_node
;
11552 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11555 type_is_deprecated (tree type
)
11557 enum tree_code code
;
11558 if (TREE_DEPRECATED (type
))
11560 if (TYPE_NAME (type
)
11561 && TREE_DEPRECATED (TYPE_NAME (type
)))
11564 /* Do warn about using typedefs to a deprecated class. */
11565 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11566 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11568 code
= TREE_CODE (type
);
11570 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11571 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11572 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11573 return type_is_deprecated (TREE_TYPE (type
));
11575 if (TYPE_PTRMEMFUNC_P (type
))
11576 return type_is_deprecated
11577 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11582 /* Decode the list of parameter types for a function type.
11583 Given the list of things declared inside the parens,
11584 return a list of types.
11586 If this parameter does not end with an ellipsis, we append
11589 *PARMS is set to the chain of PARM_DECLs created. */
11592 grokparms (tree parmlist
, tree
*parms
)
11594 tree result
= NULL_TREE
;
11595 tree decls
= NULL_TREE
;
11599 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11601 tree type
= NULL_TREE
;
11602 tree init
= TREE_PURPOSE (parm
);
11603 tree decl
= TREE_VALUE (parm
);
11604 const char *errmsg
;
11606 if (parm
== void_list_node
)
11609 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11612 type
= TREE_TYPE (decl
);
11613 if (VOID_TYPE_P (type
))
11615 if (same_type_p (type
, void_type_node
)
11617 && !DECL_NAME (decl
) && !result
11618 && TREE_CHAIN (parm
) == void_list_node
)
11619 /* DR 577: A parameter list consisting of a single
11620 unnamed parameter of non-dependent type 'void'. */
11622 else if (cv_qualified_p (type
))
11623 error_at (DECL_SOURCE_LOCATION (decl
),
11624 "invalid use of cv-qualified type %qT in "
11625 "parameter declaration", type
);
11627 error_at (DECL_SOURCE_LOCATION (decl
),
11628 "invalid use of type %<void%> in parameter "
11630 /* It's not a good idea to actually create parameters of
11631 type `void'; other parts of the compiler assume that a
11632 void type terminates the parameter list. */
11633 type
= error_mark_node
;
11634 TREE_TYPE (decl
) = error_mark_node
;
11637 if (type
!= error_mark_node
11638 && TYPE_FOR_JAVA (type
)
11639 && MAYBE_CLASS_TYPE_P (type
))
11641 error ("parameter %qD has Java class type", decl
);
11642 type
= error_mark_node
;
11643 TREE_TYPE (decl
) = error_mark_node
;
11647 if (type
!= error_mark_node
11648 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11651 type
= error_mark_node
;
11652 TREE_TYPE (decl
) = error_mark_node
;
11655 if (type
!= error_mark_node
)
11657 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11659 tree deptype
= type_is_deprecated (type
);
11661 warn_deprecated_use (deptype
, NULL_TREE
);
11664 /* Top-level qualifiers on the parameters are
11665 ignored for function types. */
11666 type
= cp_build_qualified_type (type
, 0);
11667 if (TREE_CODE (type
) == METHOD_TYPE
)
11669 error ("parameter %qD invalidly declared method type", decl
);
11670 type
= build_pointer_type (type
);
11671 TREE_TYPE (decl
) = type
;
11673 else if (abstract_virtuals_error (decl
, type
))
11674 any_error
= 1; /* Seems like a good idea. */
11675 else if (POINTER_TYPE_P (type
))
11677 /* [dcl.fct]/6, parameter types cannot contain pointers
11678 (references) to arrays of unknown bound. */
11679 tree t
= TREE_TYPE (type
);
11680 int ptr
= TYPE_PTR_P (type
);
11684 if (TYPE_PTR_P (t
))
11686 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11688 else if (!TYPE_DOMAIN (t
))
11692 if (TREE_CODE (t
) == ARRAY_TYPE
)
11694 ? G_("parameter %qD includes pointer to array of "
11695 "unknown bound %qT")
11696 : G_("parameter %qD includes reference to array of "
11697 "unknown bound %qT"),
11703 else if (init
&& !processing_template_decl
)
11704 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11707 DECL_CHAIN (decl
) = decls
;
11709 result
= tree_cons (init
, type
, result
);
11711 decls
= nreverse (decls
);
11712 result
= nreverse (result
);
11714 result
= chainon (result
, void_list_node
);
11721 /* D is a constructor or overloaded `operator='.
11723 Let T be the class in which D is declared. Then, this function
11726 -1 if D's is an ill-formed constructor or copy assignment operator
11727 whose first parameter is of type `T'.
11728 0 if D is not a copy constructor or copy assignment
11730 1 if D is a copy constructor or copy assignment operator whose
11731 first parameter is a reference to non-const qualified T.
11732 2 if D is a copy constructor or copy assignment operator whose
11733 first parameter is a reference to const qualified T.
11735 This function can be used as a predicate. Positive values indicate
11736 a copy constructor and nonzero values indicate a copy assignment
11740 copy_fn_p (const_tree d
)
11746 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11748 if (TREE_CODE (d
) == TEMPLATE_DECL
11749 || (DECL_TEMPLATE_INFO (d
)
11750 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11751 /* Instantiations of template member functions are never copy
11752 functions. Note that member functions of templated classes are
11753 represented as template functions internally, and we must
11754 accept those as copy functions. */
11757 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11761 arg_type
= TREE_VALUE (args
);
11762 if (arg_type
== error_mark_node
)
11765 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11767 /* Pass by value copy assignment operator. */
11770 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11771 && !TYPE_REF_IS_RVALUE (arg_type
)
11772 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11774 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11780 args
= TREE_CHAIN (args
);
11782 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11783 /* There are more non-optional args. */
11789 /* D is a constructor or overloaded `operator='.
11791 Let T be the class in which D is declared. Then, this function
11792 returns true when D is a move constructor or move assignment
11793 operator, false otherwise. */
11796 move_fn_p (const_tree d
)
11798 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11800 if (cxx_dialect
== cxx98
)
11801 /* There are no move constructors if we are in C++98 mode. */
11804 if (TREE_CODE (d
) == TEMPLATE_DECL
11805 || (DECL_TEMPLATE_INFO (d
)
11806 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11807 /* Instantiations of template member functions are never move
11808 functions. Note that member functions of templated classes are
11809 represented as template functions internally, and we must
11810 accept those as move functions. */
11813 return move_signature_fn_p (d
);
11816 /* D is a constructor or overloaded `operator='.
11818 Then, this function returns true when D has the same signature as a move
11819 constructor or move assignment operator (because either it is such a
11820 ctor/op= or it is a template specialization with the same signature),
11821 false otherwise. */
11824 move_signature_fn_p (const_tree d
)
11828 bool result
= false;
11830 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11834 arg_type
= TREE_VALUE (args
);
11835 if (arg_type
== error_mark_node
)
11838 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11839 && TYPE_REF_IS_RVALUE (arg_type
)
11840 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11844 args
= TREE_CHAIN (args
);
11846 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11847 /* There are more non-optional args. */
11853 /* Remember any special properties of member function DECL. */
11856 grok_special_member_properties (tree decl
)
11860 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11863 class_type
= DECL_CONTEXT (decl
);
11864 if (DECL_CONSTRUCTOR_P (decl
))
11866 int ctor
= copy_fn_p (decl
);
11868 if (!DECL_ARTIFICIAL (decl
))
11869 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11875 A non-template constructor for class X is a copy
11876 constructor if its first parameter is of type X&, const
11877 X&, volatile X& or const volatile X&, and either there
11878 are no other parameters or else all other parameters have
11879 default arguments. */
11880 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11881 if (user_provided_p (decl
))
11882 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11884 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11886 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11887 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11888 else if (move_fn_p (decl
) && user_provided_p (decl
))
11889 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11890 else if (is_list_ctor (decl
))
11891 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11893 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11894 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11895 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11897 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11901 A non-template assignment operator for class X is a copy
11902 assignment operator if its parameter is of type X, X&, const
11903 X&, volatile X& or const volatile X&. */
11905 int assop
= copy_fn_p (decl
);
11909 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11910 if (user_provided_p (decl
))
11911 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11913 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11915 else if (move_fn_p (decl
) && user_provided_p (decl
))
11916 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11918 /* Destructors are handled in check_methods. */
11921 /* Check a constructor DECL has the correct form. Complains
11922 if the class has a constructor of the form X(X). */
11925 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11927 int ctor_parm
= copy_fn_p (decl
);
11933 A declaration of a constructor for a class X is ill-formed if
11934 its first parameter is of type (optionally cv-qualified) X
11935 and either there are no other parameters or else all other
11936 parameters have default arguments.
11938 We *don't* complain about member template instantiations that
11939 have this form, though; they can occur as we try to decide
11940 what constructor to use during overload resolution. Since
11941 overload resolution will never prefer such a constructor to
11942 the non-template copy constructor (which is either explicitly
11943 or implicitly defined), there's no need to worry about their
11944 existence. Theoretically, they should never even be
11945 instantiated, but that's hard to forestall. */
11946 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11954 /* An operator with this code is unary, but can also be binary. */
11957 ambi_op_p (enum tree_code code
)
11959 return (code
== INDIRECT_REF
11960 || code
== ADDR_EXPR
11961 || code
== UNARY_PLUS_EXPR
11962 || code
== NEGATE_EXPR
11963 || code
== PREINCREMENT_EXPR
11964 || code
== PREDECREMENT_EXPR
);
11967 /* An operator with this name can only be unary. */
11970 unary_op_p (enum tree_code code
)
11972 return (code
== TRUTH_NOT_EXPR
11973 || code
== BIT_NOT_EXPR
11974 || code
== COMPONENT_REF
11975 || code
== TYPE_EXPR
);
11978 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11979 errors are issued for invalid declarations. */
11982 grok_op_properties (tree decl
, bool complain
)
11984 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11986 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11987 tree name
= DECL_NAME (decl
);
11988 enum tree_code operator_code
;
11993 /* Count the number of arguments and check for ellipsis. */
11994 for (argtype
= argtypes
, arity
= 0;
11995 argtype
&& argtype
!= void_list_node
;
11996 argtype
= TREE_CHAIN (argtype
))
11998 ellipsis_p
= !argtype
;
12000 class_type
= DECL_CONTEXT (decl
);
12001 if (class_type
&& !CLASS_TYPE_P (class_type
))
12002 class_type
= NULL_TREE
;
12004 if (DECL_CONV_FN_P (decl
))
12005 operator_code
= TYPE_EXPR
;
12009 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
12010 if (ansi_opname (CODE) == name) \
12012 operator_code = (CODE); \
12015 else if (ansi_assopname (CODE) == name) \
12017 operator_code = (CODE); \
12018 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
12022 #include "operators.def"
12023 #undef DEF_OPERATOR
12025 gcc_unreachable ();
12028 gcc_assert (operator_code
!= MAX_TREE_CODES
);
12029 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
12032 switch (operator_code
)
12035 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
12039 TYPE_GETS_DELETE (class_type
) |= 1;
12043 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
12046 case VEC_DELETE_EXPR
:
12047 TYPE_GETS_DELETE (class_type
) |= 2;
12054 /* [basic.std.dynamic.allocation]/1:
12056 A program is ill-formed if an allocation function is declared
12057 in a namespace scope other than global scope or declared static
12060 The same also holds true for deallocation functions. */
12061 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
12062 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
12064 if (DECL_NAMESPACE_SCOPE_P (decl
))
12066 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
12068 error ("%qD may not be declared within a namespace", decl
);
12071 else if (!TREE_PUBLIC (decl
))
12073 error ("%qD may not be declared as static", decl
);
12079 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
12081 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
12082 DECL_IS_OPERATOR_NEW (decl
) = 1;
12084 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
12085 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
12088 /* An operator function must either be a non-static member function
12089 or have at least one parameter of a class, a reference to a class,
12090 an enumeration, or a reference to an enumeration. 13.4.0.6 */
12091 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
12093 if (operator_code
== TYPE_EXPR
12094 || operator_code
== CALL_EXPR
12095 || operator_code
== COMPONENT_REF
12096 || operator_code
== ARRAY_REF
12097 || operator_code
== NOP_EXPR
)
12099 error ("%qD must be a nonstatic member function", decl
);
12106 if (DECL_STATIC_FUNCTION_P (decl
))
12108 error ("%qD must be either a non-static member "
12109 "function or a non-member function", decl
);
12113 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
12115 tree arg
= non_reference (TREE_VALUE (p
));
12116 if (arg
== error_mark_node
)
12119 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
12120 because these checks are performed even on
12121 template functions. */
12122 if (MAYBE_CLASS_TYPE_P (arg
)
12123 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
12127 if (!p
|| p
== void_list_node
)
12130 error ("%qD must have an argument of class or "
12131 "enumerated type", decl
);
12137 /* There are no restrictions on the arguments to an overloaded
12139 if (operator_code
== CALL_EXPR
)
12142 /* Warn about conversion operators that will never be used. */
12143 if (IDENTIFIER_TYPENAME_P (name
)
12144 && ! DECL_TEMPLATE_INFO (decl
)
12146 /* Warn only declaring the function; there is no need to
12147 warn again about out-of-class definitions. */
12148 && class_type
== current_class_type
)
12150 tree t
= TREE_TYPE (name
);
12151 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
12154 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
12156 if (VOID_TYPE_P (t
))
12157 warning (OPT_Wconversion
,
12159 ? G_("conversion to a reference to void "
12160 "will never use a type conversion operator")
12161 : G_("conversion to void "
12162 "will never use a type conversion operator"));
12163 else if (class_type
)
12165 if (t
== class_type
)
12166 warning (OPT_Wconversion
,
12168 ? G_("conversion to a reference to the same type "
12169 "will never use a type conversion operator")
12170 : G_("conversion to the same type "
12171 "will never use a type conversion operator"));
12172 /* Don't force t to be complete here. */
12173 else if (MAYBE_CLASS_TYPE_P (t
)
12174 && COMPLETE_TYPE_P (t
)
12175 && DERIVED_FROM_P (t
, class_type
))
12176 warning (OPT_Wconversion
,
12178 ? G_("conversion to a reference to a base class "
12179 "will never use a type conversion operator")
12180 : G_("conversion to a base class "
12181 "will never use a type conversion operator"));
12186 if (operator_code
== COND_EXPR
)
12189 error ("ISO C++ prohibits overloading operator ?:");
12192 else if (ellipsis_p
)
12194 error ("%qD must not have variable number of arguments", decl
);
12197 else if (ambi_op_p (operator_code
))
12200 /* We pick the one-argument operator codes by default, so
12201 we don't have to change anything. */
12203 else if (arity
== 2)
12205 /* If we thought this was a unary operator, we now know
12206 it to be a binary operator. */
12207 switch (operator_code
)
12210 operator_code
= MULT_EXPR
;
12214 operator_code
= BIT_AND_EXPR
;
12217 case UNARY_PLUS_EXPR
:
12218 operator_code
= PLUS_EXPR
;
12222 operator_code
= MINUS_EXPR
;
12225 case PREINCREMENT_EXPR
:
12226 operator_code
= POSTINCREMENT_EXPR
;
12229 case PREDECREMENT_EXPR
:
12230 operator_code
= POSTDECREMENT_EXPR
;
12234 gcc_unreachable ();
12237 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
12239 if ((operator_code
== POSTINCREMENT_EXPR
12240 || operator_code
== POSTDECREMENT_EXPR
)
12241 && ! processing_template_decl
12242 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
12245 error ("postfix %qD must take %<int%> as its argument",
12248 error ("postfix %qD must take %<int%> as its second "
12256 error ("%qD must take either zero or one argument", decl
);
12258 error ("%qD must take either one or two arguments", decl
);
12262 /* More Effective C++ rule 6. */
12264 && (operator_code
== POSTINCREMENT_EXPR
12265 || operator_code
== POSTDECREMENT_EXPR
12266 || operator_code
== PREINCREMENT_EXPR
12267 || operator_code
== PREDECREMENT_EXPR
))
12269 tree arg
= TREE_VALUE (argtypes
);
12270 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
12271 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
12272 arg
= TREE_TYPE (arg
);
12273 arg
= TYPE_MAIN_VARIANT (arg
);
12274 if (operator_code
== PREINCREMENT_EXPR
12275 || operator_code
== PREDECREMENT_EXPR
)
12277 if (TREE_CODE (ret
) != REFERENCE_TYPE
12278 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
12280 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
12281 build_reference_type (arg
));
12285 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
12286 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
12290 else if (unary_op_p (operator_code
))
12295 error ("%qD must take %<void%>", decl
);
12297 error ("%qD must take exactly one argument", decl
);
12301 else /* if (binary_op_p (operator_code)) */
12306 error ("%qD must take exactly one argument", decl
);
12308 error ("%qD must take exactly two arguments", decl
);
12312 /* More Effective C++ rule 7. */
12314 && (operator_code
== TRUTH_ANDIF_EXPR
12315 || operator_code
== TRUTH_ORIF_EXPR
12316 || operator_code
== COMPOUND_EXPR
))
12317 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12321 /* Effective C++ rule 23. */
12324 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12325 && (operator_code
== PLUS_EXPR
12326 || operator_code
== MINUS_EXPR
12327 || operator_code
== TRUNC_DIV_EXPR
12328 || operator_code
== MULT_EXPR
12329 || operator_code
== TRUNC_MOD_EXPR
)
12330 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12331 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12333 /* [over.oper]/8 */
12334 for (; argtypes
&& argtypes
!= void_list_node
;
12335 argtypes
= TREE_CHAIN (argtypes
))
12336 if (TREE_PURPOSE (argtypes
))
12338 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12339 if (operator_code
== POSTINCREMENT_EXPR
12340 || operator_code
== POSTDECREMENT_EXPR
)
12342 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12347 error ("%qD cannot have default arguments", decl
);
12355 /* Return a string giving the keyword associate with CODE. */
12357 static const char *
12358 tag_name (enum tag_types code
)
12370 case typename_type
:
12373 gcc_unreachable ();
12377 /* Name lookup in an elaborated-type-specifier (after the keyword
12378 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12379 elaborated-type-specifier is invalid, issue a diagnostic and return
12380 error_mark_node; otherwise, return the *_TYPE to which it referred.
12381 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12384 check_elaborated_type_specifier (enum tag_types tag_code
,
12386 bool allow_template_p
)
12392 struct S { struct S *p; };
12394 name lookup will find the TYPE_DECL for the implicit "S::S"
12395 typedef. Adjust for that here. */
12396 if (DECL_SELF_REFERENCE_P (decl
))
12397 decl
= TYPE_NAME (TREE_TYPE (decl
));
12399 type
= TREE_TYPE (decl
);
12401 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12402 is false for this case as well. */
12403 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12405 error ("using template type parameter %qT after %qs",
12406 type
, tag_name (tag_code
));
12407 return error_mark_node
;
12409 /* Accept template template parameters. */
12410 else if (allow_template_p
12411 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12412 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12416 If the identifier resolves to a typedef-name or the
12417 simple-template-id resolves to an alias template
12418 specialization, the elaborated-type-specifier is ill-formed.
12420 In other words, the only legitimate declaration to use in the
12421 elaborated type specifier is the implicit typedef created when
12422 the type is declared. */
12423 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12424 && !DECL_SELF_REFERENCE_P (decl
)
12425 && tag_code
!= typename_type
)
12427 if (alias_template_specialization_p (type
))
12428 error ("using alias template specialization %qT after %qs",
12429 type
, tag_name (tag_code
));
12431 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12432 inform (DECL_SOURCE_LOCATION (decl
),
12433 "%qD has a previous declaration here", decl
);
12434 return error_mark_node
;
12436 else if (TREE_CODE (type
) != RECORD_TYPE
12437 && TREE_CODE (type
) != UNION_TYPE
12438 && tag_code
!= enum_type
12439 && tag_code
!= typename_type
)
12441 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12442 inform (input_location
, "%q+T has a previous declaration here", type
);
12443 return error_mark_node
;
12445 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12446 && tag_code
== enum_type
)
12448 error ("%qT referred to as enum", type
);
12449 inform (input_location
, "%q+T has a previous declaration here", type
);
12450 return error_mark_node
;
12452 else if (!allow_template_p
12453 && TREE_CODE (type
) == RECORD_TYPE
12454 && CLASSTYPE_IS_TEMPLATE (type
))
12456 /* If a class template appears as elaborated type specifier
12457 without a template header such as:
12459 template <class T> class C {};
12460 void f(class C); // No template header here
12462 then the required template argument is missing. */
12463 error ("template argument required for %<%s %T%>",
12464 tag_name (tag_code
),
12465 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12466 return error_mark_node
;
12472 /* Lookup NAME in elaborate type specifier in scope according to
12473 SCOPE and issue diagnostics if necessary.
12474 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12475 found, and ERROR_MARK_NODE for type error. */
12478 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12479 tag_scope scope
, bool template_header_p
)
12483 if (scope
== ts_global
)
12485 /* First try ordinary name lookup, ignoring hidden class name
12486 injected via friend declaration. */
12487 decl
= lookup_name_prefer_type (name
, 2);
12488 decl
= strip_using_decl (decl
);
12489 /* If that fails, the name will be placed in the smallest
12490 non-class, non-function-prototype scope according to 3.3.1/5.
12491 We may already have a hidden name declared as friend in this
12492 scope. So lookup again but not ignoring hidden names.
12493 If we find one, that name will be made visible rather than
12494 creating a new tag. */
12496 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12499 decl
= lookup_type_scope (name
, scope
);
12502 && (DECL_CLASS_TEMPLATE_P (decl
)
12503 /* If scope is ts_current we're defining a class, so ignore a
12504 template template parameter. */
12505 || (scope
!= ts_current
12506 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12507 decl
= DECL_TEMPLATE_RESULT (decl
);
12509 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12511 /* Look for invalid nested type:
12515 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12517 error ("%qD has the same name as the class in which it is "
12520 return error_mark_node
;
12523 /* Two cases we need to consider when deciding if a class
12524 template is allowed as an elaborated type specifier:
12525 1. It is a self reference to its own class.
12526 2. It comes with a template header.
12530 template <class T> class C {
12531 class C *c1; // DECL_SELF_REFERENCE_P is true
12534 template <class U> class C; // template_header_p is true
12535 template <class T> class C<T>::D {
12536 class C *c2; // DECL_SELF_REFERENCE_P is true
12539 t
= check_elaborated_type_specifier (tag_code
,
12542 | DECL_SELF_REFERENCE_P (decl
));
12545 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12547 error ("reference to %qD is ambiguous", name
);
12548 print_candidates (decl
);
12549 return error_mark_node
;
12555 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12556 Define the tag as a forward-reference if it is not defined.
12558 If a declaration is given, process it here, and report an error if
12559 multiple declarations are not identical.
12561 SCOPE is TS_CURRENT when this is also a definition. Only look in
12562 the current frame for the name (since C++ allows new names in any
12563 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12564 declaration. Only look beginning from the current scope outward up
12565 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12567 TEMPLATE_HEADER_P is true when this declaration is preceded by
12568 a set of template parameters. */
12571 xref_tag_1 (enum tag_types tag_code
, tree name
,
12572 tag_scope orig_scope
, bool template_header_p
)
12574 enum tree_code code
;
12576 tree context
= NULL_TREE
;
12579 gcc_assert (identifier_p (name
));
12585 code
= RECORD_TYPE
;
12591 code
= ENUMERAL_TYPE
;
12594 gcc_unreachable ();
12597 if (orig_scope
== ts_lambda
)
12598 scope
= ts_current
;
12600 scope
= orig_scope
;
12602 /* In case of anonymous name, xref_tag is only called to
12603 make type node and push name. Name lookup is not required. */
12604 if (anon_aggrname_p (name
))
12607 t
= lookup_and_check_tag (tag_code
, name
,
12608 scope
, template_header_p
);
12610 if (t
== error_mark_node
)
12611 return error_mark_node
;
12613 if (scope
!= ts_current
&& t
&& current_class_type
12614 && template_class_depth (current_class_type
)
12615 && template_header_p
)
12617 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12620 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12621 definition of this tag. Since, in addition, we are currently
12622 processing a (member) template declaration of a template
12623 class, we must be very careful; consider:
12630 { template <class V>
12631 friend struct S1; };
12633 Here, the S2::S1 declaration should not be confused with the
12634 outer declaration. In particular, the inner version should
12635 have a template parameter of level 2, not level 1. This
12636 would be particularly important if the member declaration
12639 template <class V = U> friend struct S1;
12641 say, when we should tsubst into `U' when instantiating
12642 S2. On the other hand, when presented with:
12652 we must find the inner binding eventually. We
12653 accomplish this by making sure that the new type we
12654 create to represent this declaration has the right
12656 context
= TYPE_CONTEXT (t
);
12662 /* If no such tag is yet defined, create a forward-reference node
12663 and record it as the "definition".
12664 When a real declaration of this type is found,
12665 the forward-reference will be altered into a real type. */
12666 if (code
== ENUMERAL_TYPE
)
12668 error ("use of enum %q#D without previous declaration", name
);
12669 return error_mark_node
;
12673 t
= make_class_type (code
);
12674 TYPE_CONTEXT (t
) = context
;
12675 if (orig_scope
== ts_lambda
)
12676 /* Remember that we're declaring a lambda to avoid bogus errors
12677 in push_template_decl. */
12678 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12679 t
= pushtag (name
, t
, scope
);
12684 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12686 /* Check that we aren't trying to overload a class with different
12688 tree constr
= NULL_TREE
;
12689 if (current_template_parms
)
12691 tree reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
12692 constr
= build_constraints (reqs
, NULL_TREE
);
12694 if (!redeclare_class_template (t
, current_template_parms
, constr
))
12695 return error_mark_node
;
12697 else if (!processing_template_decl
12698 && CLASS_TYPE_P (t
)
12699 && CLASSTYPE_IS_TEMPLATE (t
))
12701 error ("redeclaration of %qT as a non-template", t
);
12702 error ("previous declaration %q+D", t
);
12703 return error_mark_node
;
12706 /* Make injected friend class visible. */
12707 if (scope
!= ts_within_enclosing_non_class
12708 && hidden_name_p (TYPE_NAME (t
)))
12710 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12711 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12713 if (TYPE_TEMPLATE_INFO (t
))
12715 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12716 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12724 /* Wrapper for xref_tag_1. */
12727 xref_tag (enum tag_types tag_code
, tree name
,
12728 tag_scope scope
, bool template_header_p
)
12732 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12733 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12734 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12740 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12742 enum tag_types tag_kind
;
12744 if (TREE_CODE (old
) == RECORD_TYPE
)
12745 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12747 tag_kind
= union_type
;
12749 if (id
== NULL_TREE
)
12750 id
= TYPE_IDENTIFIER (old
);
12752 return xref_tag (tag_kind
, id
, scope
, false);
12755 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12756 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12757 access_* node, and the TREE_VALUE is the type of the base-class.
12758 Non-NULL TREE_TYPE indicates virtual inheritance.
12760 Returns true if the binfo hierarchy was successfully created,
12761 false if an error was detected. */
12764 xref_basetypes (tree ref
, tree base_list
)
12767 tree binfo
, base_binfo
;
12768 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12769 unsigned max_bases
= 0; /* Maximum direct bases. */
12770 unsigned max_dvbases
= 0; /* Maximum direct virtual bases. */
12772 tree default_access
;
12773 tree igo_prev
; /* Track Inheritance Graph Order. */
12775 if (ref
== error_mark_node
)
12778 /* The base of a derived class is private by default, all others are
12780 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12781 && CLASSTYPE_DECLARED_CLASS (ref
)
12782 ? access_private_node
: access_public_node
);
12784 /* First, make sure that any templates in base-classes are
12785 instantiated. This ensures that if we call ourselves recursively
12786 we do not get confused about which classes are marked and which
12788 basep
= &base_list
;
12791 tree basetype
= TREE_VALUE (*basep
);
12793 /* The dependent_type_p call below should really be dependent_scope_p
12794 so that we give a hard error about using an incomplete type as a
12795 base, but we allow it with a pedwarn for backward
12797 if (processing_template_decl
12798 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12799 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12800 if (!dependent_type_p (basetype
)
12801 && !complete_type_or_else (basetype
, NULL
))
12802 /* An incomplete type. Remove it from the list. */
12803 *basep
= TREE_CHAIN (*basep
);
12807 if (TREE_TYPE (*basep
))
12809 if (CLASS_TYPE_P (basetype
))
12810 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12811 basep
= &TREE_CHAIN (*basep
);
12814 max_vbases
+= max_dvbases
;
12816 TYPE_MARKED_P (ref
) = 1;
12818 /* The binfo slot should be empty, unless this is an (ill-formed)
12820 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12822 error ("redefinition of %q#T", ref
);
12826 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12828 binfo
= make_tree_binfo (max_bases
);
12830 TYPE_BINFO (ref
) = binfo
;
12831 BINFO_OFFSET (binfo
) = size_zero_node
;
12832 BINFO_TYPE (binfo
) = ref
;
12834 /* Apply base-class info set up to the variants of this type. */
12835 fixup_type_variants (ref
);
12839 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12840 /* An aggregate cannot have baseclasses. */
12841 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12843 if (TREE_CODE (ref
) == UNION_TYPE
)
12845 error ("derived union %qT invalid", ref
);
12852 if (TYPE_FOR_JAVA (ref
))
12854 error ("Java class %qT cannot have multiple bases", ref
);
12858 warning (OPT_Wmultiple_inheritance
,
12859 "%qT defined with multiple direct bases", ref
);
12864 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12866 if (TYPE_FOR_JAVA (ref
))
12868 error ("Java class %qT cannot have virtual bases", ref
);
12871 else if (max_dvbases
)
12872 warning (OPT_Wvirtual_inheritance
,
12873 "%qT defined with direct virtual base", ref
);
12876 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12878 tree access
= TREE_PURPOSE (base_list
);
12879 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12880 tree basetype
= TREE_VALUE (base_list
);
12882 if (access
== access_default_node
)
12883 access
= default_access
;
12885 if (PACK_EXPANSION_P (basetype
))
12886 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12887 if (TREE_CODE (basetype
) == TYPE_DECL
)
12888 basetype
= TREE_TYPE (basetype
);
12889 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12891 error ("base type %qT fails to be a struct or class type",
12896 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12897 TYPE_FOR_JAVA (ref
) = 1;
12899 base_binfo
= NULL_TREE
;
12900 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12902 base_binfo
= TYPE_BINFO (basetype
);
12903 /* The original basetype could have been a typedef'd type. */
12904 basetype
= BINFO_TYPE (base_binfo
);
12906 /* Inherit flags from the base. */
12907 TYPE_HAS_NEW_OPERATOR (ref
)
12908 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12909 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12910 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12911 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12912 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12913 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12914 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12915 CLASSTYPE_REPEATED_BASE_P (ref
)
12916 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12919 /* We must do this test after we've seen through a typedef
12921 if (TYPE_MARKED_P (basetype
))
12923 if (basetype
== ref
)
12924 error ("recursive type %qT undefined", basetype
);
12926 error ("duplicate base type %qT invalid", basetype
);
12930 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12931 /* Regenerate the pack expansion for the bases. */
12932 basetype
= make_pack_expansion (basetype
);
12934 TYPE_MARKED_P (basetype
) = 1;
12936 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12937 &igo_prev
, via_virtual
);
12938 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12939 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12941 BINFO_BASE_APPEND (binfo
, base_binfo
);
12942 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12945 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12946 /* If we didn't get max_vbases vbases, we must have shared at
12947 least one of them, and are therefore diamond shaped. */
12948 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12950 /* Unmark all the types. */
12951 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12952 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12953 TYPE_MARKED_P (ref
) = 0;
12955 /* Now see if we have a repeated base type. */
12956 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12958 for (base_binfo
= binfo
; base_binfo
;
12959 base_binfo
= TREE_CHAIN (base_binfo
))
12961 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12963 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12966 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12968 for (base_binfo
= binfo
; base_binfo
;
12969 base_binfo
= TREE_CHAIN (base_binfo
))
12970 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12971 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12980 /* Copies the enum-related properties from type SRC to type DST.
12981 Used with the underlying type of an enum and the enum itself. */
12983 copy_type_enum (tree dst
, tree src
)
12986 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12988 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12989 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12990 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12991 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12992 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12993 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12994 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12995 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12996 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
13000 /* Begin compiling the definition of an enumeration type.
13003 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13005 UNDERLYING_TYPE is the type that will be used as the storage for
13006 the enumeration type. This should be NULL_TREE if no storage type
13009 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13011 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13013 Returns the type object, as yet incomplete.
13014 Also records info about it so that build_enumerator
13015 may be used to declare the individual values as they are read. */
13018 start_enum (tree name
, tree enumtype
, tree underlying_type
,
13019 bool scoped_enum_p
, bool *is_new
)
13021 tree prevtype
= NULL_TREE
;
13022 gcc_assert (identifier_p (name
));
13026 /* [C++0x dcl.enum]p5:
13028 If not explicitly specified, the underlying type of a scoped
13029 enumeration type is int. */
13030 if (!underlying_type
&& scoped_enum_p
)
13031 underlying_type
= integer_type_node
;
13033 if (underlying_type
)
13034 underlying_type
= cv_unqualified (underlying_type
);
13036 /* If this is the real definition for a previous forward reference,
13037 fill in the contents in the same object that used to be the
13038 forward reference. */
13040 enumtype
= lookup_and_check_tag (enum_type
, name
,
13041 /*tag_scope=*/ts_current
,
13042 /*template_header_p=*/false);
13044 /* In case of a template_decl, the only check that should be deferred
13045 to instantiation time is the comparison of underlying types. */
13046 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
13048 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
13050 error_at (input_location
, "scoped/unscoped mismatch "
13051 "in enum %q#T", enumtype
);
13052 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13053 "previous definition here");
13054 enumtype
= error_mark_node
;
13056 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
13058 error_at (input_location
, "underlying type mismatch "
13059 "in enum %q#T", enumtype
);
13060 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13061 "previous definition here");
13062 enumtype
= error_mark_node
;
13064 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
13065 && !dependent_type_p (underlying_type
)
13066 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
13067 && !same_type_p (underlying_type
,
13068 ENUM_UNDERLYING_TYPE (enumtype
)))
13070 error_at (input_location
, "different underlying type "
13071 "in enum %q#T", enumtype
);
13072 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13073 "previous definition here");
13074 underlying_type
= NULL_TREE
;
13078 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
13079 || processing_template_decl
)
13081 /* In case of error, make a dummy enum to allow parsing to
13083 if (enumtype
== error_mark_node
)
13085 name
= make_anon_name ();
13086 enumtype
= NULL_TREE
;
13089 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
13090 of an opaque enum, or an opaque enum of an already defined
13091 enumeration (C++0x only).
13092 In any other case, it'll be NULL_TREE. */
13098 prevtype
= enumtype
;
13100 /* Do not push the decl more than once, unless we need to
13101 compare underlying types at instantiation time */
13103 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
13104 || (underlying_type
13105 && dependent_type_p (underlying_type
))
13106 || (ENUM_UNDERLYING_TYPE (enumtype
)
13107 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
13109 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
13110 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
13113 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
13116 if (enumtype
== error_mark_node
)
13117 return error_mark_node
;
13119 /* The enum is considered opaque until the opening '{' of the
13120 enumerator list. */
13121 SET_OPAQUE_ENUM_P (enumtype
, true);
13122 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
13125 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
13127 if (underlying_type
)
13129 if (CP_INTEGRAL_TYPE_P (underlying_type
))
13131 copy_type_enum (enumtype
, underlying_type
);
13132 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
13134 else if (dependent_type_p (underlying_type
))
13135 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
13137 error ("underlying type %<%T%> of %<%T%> must be an integral type",
13138 underlying_type
, enumtype
);
13141 /* If into a template class, the returned enum is always the first
13142 declaration (opaque or not) seen. This way all the references to
13143 this type will be to the same declaration. The following ones are used
13144 only to check for definition errors. */
13145 if (prevtype
&& processing_template_decl
)
13151 /* After processing and defining all the values of an enumeration type,
13152 install their decls in the enumeration type.
13153 ENUMTYPE is the type object. */
13156 finish_enum_value_list (tree enumtype
)
13159 tree underlying_type
;
13162 tree minnode
, maxnode
;
13165 bool fixed_underlying_type_p
13166 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
13168 /* We built up the VALUES in reverse order. */
13169 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
13171 /* For an enum defined in a template, just set the type of the values;
13172 all further processing is postponed until the template is
13173 instantiated. We need to set the type so that tsubst of a CONST_DECL
13175 if (processing_template_decl
)
13177 for (values
= TYPE_VALUES (enumtype
);
13179 values
= TREE_CHAIN (values
))
13180 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
13184 /* Determine the minimum and maximum values of the enumerators. */
13185 if (TYPE_VALUES (enumtype
))
13187 minnode
= maxnode
= NULL_TREE
;
13189 for (values
= TYPE_VALUES (enumtype
);
13191 values
= TREE_CHAIN (values
))
13193 decl
= TREE_VALUE (values
);
13195 /* [dcl.enum]: Following the closing brace of an enum-specifier,
13196 each enumerator has the type of its enumeration. Prior to the
13197 closing brace, the type of each enumerator is the type of its
13198 initializing value. */
13199 TREE_TYPE (decl
) = enumtype
;
13201 /* Update the minimum and maximum values, if appropriate. */
13202 value
= DECL_INITIAL (decl
);
13203 if (value
== error_mark_node
)
13204 value
= integer_zero_node
;
13205 /* Figure out what the minimum and maximum values of the
13206 enumerators are. */
13208 minnode
= maxnode
= value
;
13209 else if (tree_int_cst_lt (maxnode
, value
))
13211 else if (tree_int_cst_lt (value
, minnode
))
13218 If the enumerator-list is empty, the underlying type is as if
13219 the enumeration had a single enumerator with value 0. */
13220 minnode
= maxnode
= integer_zero_node
;
13222 if (!fixed_underlying_type_p
)
13224 /* Compute the number of bits require to represent all values of the
13225 enumeration. We must do this before the type of MINNODE and
13226 MAXNODE are transformed, since tree_int_cst_min_precision relies
13227 on the TREE_TYPE of the value it is passed. */
13228 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
13229 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
13230 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
13231 int precision
= MAX (lowprec
, highprec
);
13233 bool use_short_enum
;
13235 /* Determine the underlying type of the enumeration.
13239 The underlying type of an enumeration is an integral type that
13240 can represent all the enumerator values defined in the
13241 enumeration. It is implementation-defined which integral type is
13242 used as the underlying type for an enumeration except that the
13243 underlying type shall not be larger than int unless the value of
13244 an enumerator cannot fit in an int or unsigned int.
13246 We use "int" or an "unsigned int" as the underlying type, even if
13247 a smaller integral type would work, unless the user has
13248 explicitly requested that we use the smallest possible type. The
13249 user can request that for all enumerations with a command line
13250 flag, or for just one enumeration with an attribute. */
13252 use_short_enum
= flag_short_enums
13253 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
13255 for (itk
= (use_short_enum
? itk_char
: itk_int
);
13259 underlying_type
= integer_types
[itk
];
13260 if (underlying_type
!= NULL_TREE
13261 && TYPE_PRECISION (underlying_type
) >= precision
13262 && TYPE_SIGN (underlying_type
) == sgn
)
13265 if (itk
== itk_none
)
13269 IF no integral type can represent all the enumerator values, the
13270 enumeration is ill-formed. */
13271 error ("no integral type can represent all of the enumerator values "
13272 "for %qT", enumtype
);
13273 precision
= TYPE_PRECISION (long_long_integer_type_node
);
13274 underlying_type
= integer_types
[itk_unsigned_long_long
];
13279 The value of sizeof() applied to an enumeration type, an object
13280 of an enumeration type, or an enumerator, is the value of sizeof()
13281 applied to the underlying type. */
13282 copy_type_enum (enumtype
, underlying_type
);
13284 /* Compute the minimum and maximum values for the type.
13288 For an enumeration where emin is the smallest enumerator and emax
13289 is the largest, the values of the enumeration are the values of the
13290 underlying type in the range bmin to bmax, where bmin and bmax are,
13291 respectively, the smallest and largest values of the smallest bit-
13292 field that can store emin and emax. */
13294 /* The middle-end currently assumes that types with TYPE_PRECISION
13295 narrower than their underlying type are suitably zero or sign
13296 extended to fill their mode. Similarly, it assumes that the front
13297 end assures that a value of a particular type must be within
13298 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
13300 We used to set these fields based on bmin and bmax, but that led
13301 to invalid assumptions like optimizing away bounds checking. So
13302 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
13303 TYPE_MAX_VALUE to the values for the mode above and only restrict
13304 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
13305 ENUM_UNDERLYING_TYPE (enumtype
)
13306 = build_distinct_type_copy (underlying_type
);
13307 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
13308 set_min_and_max_values_for_integral_type
13309 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
13311 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
13312 if (flag_strict_enums
)
13313 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
13316 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13318 /* Convert each of the enumerators to the type of the underlying
13319 type of the enumeration. */
13320 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13322 location_t saved_location
;
13324 decl
= TREE_VALUE (values
);
13325 saved_location
= input_location
;
13326 input_location
= DECL_SOURCE_LOCATION (decl
);
13327 if (fixed_underlying_type_p
)
13328 /* If the enumeration type has a fixed underlying type, we
13329 already checked all of the enumerator values. */
13330 value
= DECL_INITIAL (decl
);
13332 value
= perform_implicit_conversion (underlying_type
,
13333 DECL_INITIAL (decl
),
13334 tf_warning_or_error
);
13335 input_location
= saved_location
;
13337 /* Do not clobber shared ints. */
13338 value
= copy_node (value
);
13340 TREE_TYPE (value
) = enumtype
;
13341 DECL_INITIAL (decl
) = value
;
13344 /* Fix up all variant types of this enum type. */
13345 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13346 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13348 if (at_class_scope_p ()
13349 && COMPLETE_TYPE_P (current_class_type
)
13350 && UNSCOPED_ENUM_P (enumtype
))
13351 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13352 current_class_type
);
13354 /* Finish debugging output for this type. */
13355 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13358 /* Finishes the enum type. This is called only the first time an
13359 enumeration is seen, be it opaque or odinary.
13360 ENUMTYPE is the type object. */
13363 finish_enum (tree enumtype
)
13365 if (processing_template_decl
)
13367 if (at_function_scope_p ())
13368 add_stmt (build_min (TAG_DEFN
, enumtype
));
13372 /* If this is a forward declaration, there should not be any variants,
13373 though we can get a variant in the middle of an enum-specifier with
13374 wacky code like 'enum E { e = sizeof(const E*) };' */
13375 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13376 && (TYPE_VALUES (enumtype
)
13377 || !TYPE_NEXT_VARIANT (enumtype
)));
13380 /* Build and install a CONST_DECL for an enumeration constant of the
13381 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13382 Apply ATTRIBUTES if available. LOC is the location of NAME.
13383 Assignment of sequential values by default is handled here. */
13386 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13393 /* scalar_constant_value will pull out this expression, so make sure
13394 it's folded as appropriate. */
13395 if (processing_template_decl
)
13396 value
= fold_non_dependent_expr (value
);
13398 /* If the VALUE was erroneous, pretend it wasn't there; that will
13399 result in the enum being assigned the next value in sequence. */
13400 if (value
== error_mark_node
)
13403 /* Remove no-op casts from the value. */
13405 STRIP_TYPE_NOPS (value
);
13407 if (! processing_template_decl
)
13409 /* Validate and default VALUE. */
13410 if (value
!= NULL_TREE
)
13412 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13414 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13419 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13420 (TREE_TYPE (value
)))
13421 value
= perform_implicit_conversion_flags
13422 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13423 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13425 if (value
== error_mark_node
)
13428 if (value
!= NULL_TREE
)
13430 value
= cxx_constant_value (value
);
13432 if (TREE_CODE (value
) != INTEGER_CST
13433 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13435 error ("enumerator value for %qD is not an integer constant",
13442 /* Default based on previous value. */
13443 if (value
== NULL_TREE
)
13445 if (TYPE_VALUES (enumtype
))
13450 /* C++03 7.2/4: If no initializer is specified for the first
13451 enumerator, the type is an unspecified integral
13452 type. Otherwise the type is the same as the type of the
13453 initializing value of the preceding enumerator unless the
13454 incremented value is not representable in that type, in
13455 which case the type is an unspecified integral type
13456 sufficient to contain the incremented value. */
13457 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13458 if (error_operand_p (prev_value
))
13459 value
= error_mark_node
;
13462 tree type
= TREE_TYPE (prev_value
);
13463 signop sgn
= TYPE_SIGN (type
);
13464 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13468 bool pos
= !wi::neg_p (wi
, sgn
);
13469 if (!wi::fits_to_tree_p (wi
, type
))
13472 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13474 type
= integer_types
[itk
];
13475 if (type
!= NULL_TREE
13476 && (pos
|| !TYPE_UNSIGNED (type
))
13477 && wi::fits_to_tree_p (wi
, type
))
13480 if (type
&& cxx_dialect
< cxx11
13481 && itk
> itk_unsigned_long
)
13482 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13483 incremented enumerator value is too large for %<unsigned long%>" : "\
13484 incremented enumerator value is too large for %<long%>");
13486 if (type
== NULL_TREE
)
13489 value
= wide_int_to_tree (type
, wi
);
13494 error ("overflow in enumeration values at %qD", name
);
13495 value
= error_mark_node
;
13500 value
= integer_zero_node
;
13503 /* Remove no-op casts from the value. */
13504 STRIP_TYPE_NOPS (value
);
13506 /* If the underlying type of the enum is fixed, check whether
13507 the enumerator values fits in the underlying type. If it
13508 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13509 if (ENUM_UNDERLYING_TYPE (enumtype
)
13511 && TREE_CODE (value
) == INTEGER_CST
)
13513 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13514 error ("enumerator value %E is outside the range of underlying "
13515 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13517 /* Convert the value to the appropriate type. */
13518 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13522 /* C++ associates enums with global, function, or class declarations. */
13523 context
= current_scope ();
13525 /* Build the actual enumeration constant. Note that the enumeration
13526 constants have the underlying type of the enum (if it is fixed)
13527 or the type of their initializer (if the underlying type of the
13528 enum is not fixed):
13532 If the underlying type is fixed, the type of each enumerator
13533 prior to the closing brace is the underlying type; if the
13534 initializing value of an enumerator cannot be represented by
13535 the underlying type, the program is ill-formed. If the
13536 underlying type is not fixed, the type of each enumerator is
13537 the type of its initializing value.
13539 If the underlying type is not fixed, it will be computed by
13540 finish_enum and we will reset the type of this enumerator. Of
13541 course, if we're processing a template, there may be no value. */
13542 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13544 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13546 DECL_CONTEXT (decl
) = enumtype
;
13547 TREE_CONSTANT (decl
) = 1;
13548 TREE_READONLY (decl
) = 1;
13549 DECL_INITIAL (decl
) = value
;
13552 cplus_decl_attributes (&decl
, attributes
, 0);
13554 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13555 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13556 on the TYPE_FIELDS list for `S'. (That's so that you can say
13557 things like `S::i' later.) */
13558 finish_member_declaration (decl
);
13562 /* Add this enumeration constant to the list for this type. */
13563 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13566 /* Look for an enumerator with the given NAME within the enumeration
13567 type ENUMTYPE. This routine is used primarily for qualified name
13568 lookup into an enumerator in C++0x, e.g.,
13570 enum class Color { Red, Green, Blue };
13572 Color color = Color::Red;
13574 Returns the value corresponding to the enumerator, or
13575 NULL_TREE if no such enumerator was found. */
13577 lookup_enumerator (tree enumtype
, tree name
)
13580 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13582 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13583 return e
? TREE_VALUE (e
) : NULL_TREE
;
13587 /* We're defining DECL. Make sure that its type is OK. */
13590 check_function_type (tree decl
, tree current_function_parms
)
13592 tree fntype
= TREE_TYPE (decl
);
13593 tree return_type
= complete_type (TREE_TYPE (fntype
));
13595 /* In a function definition, arg types must be complete. */
13596 require_complete_types_for_parms (current_function_parms
);
13598 if (dependent_type_p (return_type
)
13599 || type_uses_auto (return_type
))
13601 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13602 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13604 tree args
= TYPE_ARG_TYPES (fntype
);
13606 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13607 error ("return type %q#T is incomplete", return_type
);
13609 error ("return type has Java class type %q#T", return_type
);
13611 /* Make it return void instead. */
13612 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13613 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13615 TREE_CHAIN (args
));
13617 fntype
= build_function_type (void_type_node
, args
);
13619 = build_exception_variant (fntype
,
13620 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13621 fntype
= (cp_build_type_attribute_variant
13622 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13623 TREE_TYPE (decl
) = fntype
;
13626 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13629 /* True iff FN is an implicitly-defined default constructor. */
13632 implicit_default_ctor_p (tree fn
)
13634 return (DECL_CONSTRUCTOR_P (fn
)
13635 && !user_provided_p (fn
)
13636 && sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (fn
)));
13639 /* Create the FUNCTION_DECL for a function definition.
13640 DECLSPECS and DECLARATOR are the parts of the declaration;
13641 they describe the function's name and the type it returns,
13642 but twisted together in a fashion that parallels the syntax of C.
13644 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13645 DECLARATOR is really the DECL for the function we are about to
13646 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13647 indicating that the function is an inline defined in-class.
13649 This function creates a binding context for the function body
13650 as well as setting up the FUNCTION_DECL in current_function_decl.
13652 For C++, we must first check whether that datum makes any sense.
13653 For example, "class A local_a(1,2);" means that variable local_a
13654 is an aggregate of type A, which should have a constructor
13655 applied to it with the argument list [1, 2].
13657 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13658 or may be a BLOCK if the function has been defined previously
13659 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13660 error_mark_node if the function has never been defined, or
13661 a BLOCK if the function has been defined somewhere. */
13664 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13666 tree ctype
= NULL_TREE
;
13669 int doing_friend
= 0;
13670 cp_binding_level
*bl
;
13671 tree current_function_parms
;
13672 struct c_fileinfo
*finfo
13673 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13674 bool honor_interface
;
13676 /* Sanity check. */
13677 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13678 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13680 fntype
= TREE_TYPE (decl1
);
13681 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13682 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13684 /* ISO C++ 11.4/5. A friend function defined in a class is in
13685 the (lexical) scope of the class in which it is defined. */
13686 if (!ctype
&& DECL_FRIEND_P (decl1
))
13688 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13690 /* CTYPE could be null here if we're dealing with a template;
13691 for example, `inline friend float foo()' inside a template
13692 will have no CTYPE set. */
13693 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13699 if (DECL_DECLARED_INLINE_P (decl1
)
13700 && lookup_attribute ("noinline", attrs
))
13701 warning_at (DECL_SOURCE_LOCATION (decl1
), 0,
13702 "inline function %qD given attribute noinline", decl1
);
13704 /* Handle gnu_inline attribute. */
13705 if (GNU_INLINE_P (decl1
))
13707 DECL_EXTERNAL (decl1
) = 1;
13708 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13709 DECL_INTERFACE_KNOWN (decl1
) = 1;
13710 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13713 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13714 /* This is a constructor, we must ensure that any default args
13715 introduced by this definition are propagated to the clones
13716 now. The clones are used directly in overload resolution. */
13717 adjust_clone_args (decl1
);
13719 /* Sometimes we don't notice that a function is a static member, and
13720 build a METHOD_TYPE for it. Fix that up now. */
13721 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13722 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13724 /* Set up current_class_type, and enter the scope of the class, if
13727 push_nested_class (ctype
);
13728 else if (DECL_STATIC_FUNCTION_P (decl1
))
13729 push_nested_class (DECL_CONTEXT (decl1
));
13731 /* Now that we have entered the scope of the class, we must restore
13732 the bindings for any template parameters surrounding DECL1, if it
13733 is an inline member template. (Order is important; consider the
13734 case where a template parameter has the same name as a field of
13735 the class.) It is not until after this point that
13736 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13737 if (flags
& SF_INCLASS_INLINE
)
13738 maybe_begin_member_template_processing (decl1
);
13740 /* Effective C++ rule 15. */
13742 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13743 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13744 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13746 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13747 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13748 if (!DECL_INITIAL (decl1
))
13749 DECL_INITIAL (decl1
) = error_mark_node
;
13751 /* This function exists in static storage.
13752 (This does not mean `static' in the C sense!) */
13753 TREE_STATIC (decl1
) = 1;
13755 /* We must call push_template_decl after current_class_type is set
13756 up. (If we are processing inline definitions after exiting a
13757 class scope, current_class_type will be NULL_TREE until set above
13758 by push_nested_class.) */
13759 if (processing_template_decl
)
13761 tree newdecl1
= push_template_decl (decl1
);
13762 if (newdecl1
== error_mark_node
)
13764 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13765 pop_nested_class ();
13771 /* We are now in the scope of the function being defined. */
13772 current_function_decl
= decl1
;
13774 /* Save the parm names or decls from this function's declarator
13775 where store_parm_decls will find them. */
13776 current_function_parms
= DECL_ARGUMENTS (decl1
);
13778 /* Make sure the parameter and return types are reasonable. When
13779 you declare a function, these types can be incomplete, but they
13780 must be complete when you define the function. */
13781 check_function_type (decl1
, current_function_parms
);
13783 /* Build the return declaration for the function. */
13784 restype
= TREE_TYPE (fntype
);
13786 if (DECL_RESULT (decl1
) == NULL_TREE
)
13790 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13791 DECL_ARTIFICIAL (resdecl
) = 1;
13792 DECL_IGNORED_P (resdecl
) = 1;
13793 DECL_RESULT (decl1
) = resdecl
;
13795 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13798 /* Let the user know we're compiling this function. */
13799 announce_function (decl1
);
13801 /* Record the decl so that the function name is defined.
13802 If we already have a decl for this name, and it is a FUNCTION_DECL,
13803 use the old decl. */
13804 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13806 /* A specialization is not used to guide overload resolution. */
13807 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13808 && !(DECL_USE_TEMPLATE (decl1
) &&
13809 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13811 tree olddecl
= pushdecl (decl1
);
13813 if (olddecl
== error_mark_node
)
13814 /* If something went wrong when registering the declaration,
13815 use DECL1; we have to have a FUNCTION_DECL to use when
13816 parsing the body of the function. */
13820 /* Otherwise, OLDDECL is either a previous declaration
13821 of the same function or DECL1 itself. */
13823 if (warn_missing_declarations
13824 && olddecl
== decl1
13825 && !DECL_MAIN_P (decl1
)
13826 && TREE_PUBLIC (decl1
)
13827 && !DECL_DECLARED_INLINE_P (decl1
))
13831 /* Check whether DECL1 is in an anonymous
13833 for (context
= DECL_CONTEXT (decl1
);
13835 context
= DECL_CONTEXT (context
))
13837 if (TREE_CODE (context
) == NAMESPACE_DECL
13838 && DECL_NAME (context
) == NULL_TREE
)
13842 if (context
== NULL
)
13843 warning_at (DECL_SOURCE_LOCATION (decl1
),
13844 OPT_Wmissing_declarations
,
13845 "no previous declaration for %qD", decl1
);
13853 /* We need to set the DECL_CONTEXT. */
13854 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13855 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13857 fntype
= TREE_TYPE (decl1
);
13858 restype
= TREE_TYPE (fntype
);
13860 /* If #pragma weak applies, mark the decl appropriately now.
13861 The pragma only applies to global functions. Because
13862 determining whether or not the #pragma applies involves
13863 computing the mangled name for the declaration, we cannot
13864 apply the pragma until after we have merged this declaration
13865 with any previous declarations; if the original declaration
13866 has a linkage specification, that specification applies to
13867 the definition as well, and may affect the mangled name. */
13868 if (DECL_FILE_SCOPE_P (decl1
))
13869 maybe_apply_pragma_weak (decl1
);
13872 /* Reset this in case the call to pushdecl changed it. */
13873 current_function_decl
= decl1
;
13875 gcc_assert (DECL_INITIAL (decl1
));
13877 /* This function may already have been parsed, in which case just
13878 return; our caller will skip over the body without parsing. */
13879 if (DECL_INITIAL (decl1
) != error_mark_node
)
13882 /* Initialize RTL machinery. We cannot do this until
13883 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13884 even when processing a template; this is how we get
13885 CFUN set up, and our per-function variables initialized.
13886 FIXME factor out the non-RTL stuff. */
13887 bl
= current_binding_level
;
13888 allocate_struct_function (decl1
, processing_template_decl
);
13890 /* Initialize the language data structures. Whenever we start
13891 a new function, we destroy temporaries in the usual way. */
13892 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13893 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13894 current_binding_level
= bl
;
13896 if (!processing_template_decl
&& type_uses_auto (restype
))
13898 FNDECL_USED_AUTO (decl1
) = true;
13899 current_function_auto_return_pattern
= restype
;
13902 /* Start the statement-tree, start the tree now. */
13903 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13905 /* If we are (erroneously) defining a function that we have already
13906 defined before, wipe out what we knew before. */
13907 if (!DECL_PENDING_INLINE_P (decl1
))
13908 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13910 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13912 /* We know that this was set up by `grokclassfn'. We do not
13913 wait until `store_parm_decls', since evil parse errors may
13914 never get us to that point. Here we keep the consistency
13915 between `current_class_type' and `current_class_ptr'. */
13916 tree t
= DECL_ARGUMENTS (decl1
);
13918 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13919 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13921 cp_function_chain
->x_current_class_ref
13922 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13923 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13924 cp_function_chain
->x_current_class_ptr
= t
;
13926 /* Constructors and destructors need to know whether they're "in
13927 charge" of initializing virtual base classes. */
13928 t
= DECL_CHAIN (t
);
13929 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13931 current_in_charge_parm
= t
;
13932 t
= DECL_CHAIN (t
);
13934 if (DECL_HAS_VTT_PARM_P (decl1
))
13936 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13937 current_vtt_parm
= t
;
13941 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13942 /* Implicitly-defined methods (like the
13943 destructor for a class in which no destructor
13944 is explicitly declared) must not be defined
13945 until their definition is needed. So, we
13946 ignore interface specifications for
13947 compiler-generated functions. */
13948 && !DECL_ARTIFICIAL (decl1
));
13950 if (processing_template_decl
)
13951 /* Don't mess with interface flags. */;
13952 else if (DECL_INTERFACE_KNOWN (decl1
))
13954 tree ctx
= decl_function_context (decl1
);
13956 if (DECL_NOT_REALLY_EXTERN (decl1
))
13957 DECL_EXTERNAL (decl1
) = 0;
13959 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13960 /* This is a function in a local class in an extern inline
13961 or template function. */
13962 comdat_linkage (decl1
);
13964 /* If this function belongs to an interface, it is public.
13965 If it belongs to someone else's interface, it is also external.
13966 This only affects inlines and template instantiations. */
13967 else if (!finfo
->interface_unknown
&& honor_interface
)
13969 if (DECL_DECLARED_INLINE_P (decl1
)
13970 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13972 DECL_EXTERNAL (decl1
)
13973 = (finfo
->interface_only
13974 || (DECL_DECLARED_INLINE_P (decl1
)
13975 && ! flag_implement_inlines
13976 && !DECL_VINDEX (decl1
)));
13978 /* For WIN32 we also want to put these in linkonce sections. */
13979 maybe_make_one_only (decl1
);
13982 DECL_EXTERNAL (decl1
) = 0;
13983 DECL_INTERFACE_KNOWN (decl1
) = 1;
13984 /* If this function is in an interface implemented in this file,
13985 make sure that the back end knows to emit this function
13987 if (!DECL_EXTERNAL (decl1
))
13988 mark_needed (decl1
);
13990 else if (finfo
->interface_unknown
&& finfo
->interface_only
13991 && honor_interface
)
13993 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13994 interface, we will have both finfo->interface_unknown and
13995 finfo->interface_only set. In that case, we don't want to
13996 use the normal heuristics because someone will supply a
13997 #pragma implementation elsewhere, and deducing it here would
13998 produce a conflict. */
13999 comdat_linkage (decl1
);
14000 DECL_EXTERNAL (decl1
) = 0;
14001 DECL_INTERFACE_KNOWN (decl1
) = 1;
14002 DECL_DEFER_OUTPUT (decl1
) = 1;
14006 /* This is a definition, not a reference.
14007 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
14008 if (!GNU_INLINE_P (decl1
))
14009 DECL_EXTERNAL (decl1
) = 0;
14011 if ((DECL_DECLARED_INLINE_P (decl1
)
14012 || DECL_TEMPLATE_INSTANTIATION (decl1
))
14013 && ! DECL_INTERFACE_KNOWN (decl1
))
14014 DECL_DEFER_OUTPUT (decl1
) = 1;
14016 DECL_INTERFACE_KNOWN (decl1
) = 1;
14019 /* Determine the ELF visibility attribute for the function. We must not
14020 do this before calling "pushdecl", as we must allow "duplicate_decls"
14021 to merge any attributes appropriately. We also need to wait until
14023 if (!DECL_CLONED_FUNCTION_P (decl1
))
14024 determine_visibility (decl1
);
14026 if (!processing_template_decl
)
14027 maybe_instantiate_noexcept (decl1
);
14029 begin_scope (sk_function_parms
, decl1
);
14033 if (DECL_DESTRUCTOR_P (decl1
)
14034 || (DECL_CONSTRUCTOR_P (decl1
)
14035 && targetm
.cxx
.cdtor_returns_this ()))
14037 cdtor_label
= create_artificial_label (input_location
);
14040 start_fname_decls ();
14042 store_parm_decls (current_function_parms
);
14044 if (!processing_template_decl
14045 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
)
14046 /* We can't clobber safely for an implicitly-defined default constructor
14047 because part of the initialization might happen before we enter the
14048 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
14049 && !implicit_default_ctor_p (decl1
))
14051 /* Insert a clobber to let the back end know that the object storage
14052 is dead when we enter the constructor. */
14053 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
14054 tree clobber
= build_constructor (btype
, NULL
);
14055 TREE_THIS_VOLATILE (clobber
) = true;
14056 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
14057 bref
= convert_from_reference (bref
);
14058 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
14059 finish_expr_stmt (exprstmt
);
14066 /* Like start_preparsed_function, except that instead of a
14067 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
14069 Returns true on success. If the DECLARATOR is not suitable
14070 for a function, we return false, which tells the parser to
14071 skip the entire function. */
14074 start_function (cp_decl_specifier_seq
*declspecs
,
14075 const cp_declarator
*declarator
,
14080 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
14081 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
14082 if (decl1
== error_mark_node
)
14084 /* If the declarator is not suitable for a function definition,
14085 cause a syntax error. */
14086 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
14088 error ("invalid function declaration");
14092 if (DECL_MAIN_P (decl1
))
14093 /* main must return int. grokfndecl should have corrected it
14094 (and issued a diagnostic) if the user got it wrong. */
14095 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
14096 integer_type_node
));
14098 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
14101 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
14105 use_eh_spec_block (tree fn
)
14107 return (flag_exceptions
&& flag_enforce_eh_specs
14108 && !processing_template_decl
14109 && !type_throw_all_p (TREE_TYPE (fn
))
14110 /* We insert the EH_SPEC_BLOCK only in the original
14111 function; then, it is copied automatically to the
14113 && !DECL_CLONED_FUNCTION_P (fn
)
14114 /* Implicitly-generated constructors and destructors have
14115 exception specifications. However, those specifications
14116 are the union of the possible exceptions specified by the
14117 constructors/destructors for bases and members, so no
14118 unallowed exception will ever reach this function. By
14119 not creating the EH_SPEC_BLOCK we save a little memory,
14120 and we avoid spurious warnings about unreachable
14122 && !DECL_DEFAULTED_FN (fn
));
14125 /* Store the parameter declarations into the current function declaration.
14126 This is called after parsing the parameter declarations, before
14127 digesting the body of the function.
14129 Also install to binding contour return value identifier, if any. */
14132 store_parm_decls (tree current_function_parms
)
14134 tree fndecl
= current_function_decl
;
14137 /* This is a chain of any other decls that came in among the parm
14138 declarations. If a parm is declared with enum {foo, bar} x;
14139 then CONST_DECLs for foo and bar are put here. */
14140 tree nonparms
= NULL_TREE
;
14142 if (current_function_parms
)
14144 /* This case is when the function was defined with an ANSI prototype.
14145 The parms already have decls, so we need not do anything here
14146 except record them as in effect
14147 and complain if any redundant old-style parm decls were written. */
14149 tree specparms
= current_function_parms
;
14152 /* Must clear this because it might contain TYPE_DECLs declared
14154 current_binding_level
->names
= NULL
;
14156 /* If we're doing semantic analysis, then we'll call pushdecl
14157 for each of these. We must do them in reverse order so that
14158 they end in the correct forward order. */
14159 specparms
= nreverse (specparms
);
14161 for (parm
= specparms
; parm
; parm
= next
)
14163 next
= DECL_CHAIN (parm
);
14164 if (TREE_CODE (parm
) == PARM_DECL
)
14166 if (DECL_NAME (parm
) == NULL_TREE
14167 || !VOID_TYPE_P (parm
))
14170 error ("parameter %qD declared void", parm
);
14174 /* If we find an enum constant or a type tag,
14175 put it aside for the moment. */
14176 TREE_CHAIN (parm
) = NULL_TREE
;
14177 nonparms
= chainon (nonparms
, parm
);
14181 /* Get the decls in their original chain order and record in the
14182 function. This is all and only the PARM_DECLs that were
14183 pushed into scope by the loop above. */
14184 DECL_ARGUMENTS (fndecl
) = getdecls ();
14187 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
14189 /* Now store the final chain of decls for the arguments
14190 as the decl-chain of the current lexical scope.
14191 Put the enumerators in as well, at the front so that
14192 DECL_ARGUMENTS is not modified. */
14193 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
14195 if (use_eh_spec_block (current_function_decl
))
14196 current_eh_spec_block
= begin_eh_spec_block ();
14200 /* We have finished doing semantic analysis on DECL, but have not yet
14201 generated RTL for its body. Save away our current state, so that
14202 when we want to generate RTL later we know what to do. */
14205 save_function_data (tree decl
)
14207 struct language_function
*f
;
14209 /* Save the language-specific per-function data so that we can
14210 get it back when we really expand this function. */
14211 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
14214 f
= ggc_alloc
<language_function
> ();
14215 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
14216 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
14218 /* Clear out the bits we don't need. */
14219 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
14220 f
->bindings
= NULL
;
14221 f
->x_local_names
= NULL
;
14222 f
->base
.local_typedefs
= NULL
;
14226 /* Set the return value of the constructor (if present). */
14229 finish_constructor_body (void)
14234 if (targetm
.cxx
.cdtor_returns_this ()
14235 && (! TYPE_FOR_JAVA (current_class_type
)))
14237 /* Any return from a constructor will end up here. */
14238 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
14240 val
= DECL_ARGUMENTS (current_function_decl
);
14241 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14242 DECL_RESULT (current_function_decl
), val
);
14243 /* Return the address of the object. */
14244 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14245 add_stmt (exprstmt
);
14249 /* Do all the processing for the beginning of a destructor; set up the
14250 vtable pointers and cleanups for bases and members. */
14253 begin_destructor_body (void)
14255 tree compound_stmt
;
14257 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
14258 issued an error message. We still want to try to process the
14259 body of the function, but initialize_vtbl_ptrs will crash if
14260 TYPE_BINFO is NULL. */
14261 if (COMPLETE_TYPE_P (current_class_type
))
14263 compound_stmt
= begin_compound_stmt (0);
14264 /* Make all virtual function table pointers in non-virtual base
14265 classes point to CURRENT_CLASS_TYPE's virtual function
14267 initialize_vtbl_ptrs (current_class_ptr
);
14268 finish_compound_stmt (compound_stmt
);
14270 if (flag_lifetime_dse
)
14272 /* Insert a cleanup to let the back end know that the object is dead
14273 when we exit the destructor, either normally or via exception. */
14274 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
14275 tree clobber
= build_constructor (btype
, NULL
);
14276 TREE_THIS_VOLATILE (clobber
) = true;
14277 tree bref
= build_nop (build_reference_type (btype
),
14278 current_class_ptr
);
14279 bref
= convert_from_reference (bref
);
14280 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
14281 finish_decl_cleanup (NULL_TREE
, exprstmt
);
14284 /* And insert cleanups for our bases and members so that they
14285 will be properly destroyed if we throw. */
14286 push_base_cleanups ();
14290 /* At the end of every destructor we generate code to delete the object if
14291 necessary. Do that now. */
14294 finish_destructor_body (void)
14298 /* Any return from a destructor will end up here; that way all base
14299 and member cleanups will be run when the function returns. */
14300 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
14302 /* In a virtual destructor, we must call delete. */
14303 if (DECL_VIRTUAL_P (current_function_decl
))
14306 tree virtual_size
= cxx_sizeof (current_class_type
);
14310 At the point of definition of a virtual destructor (including
14311 an implicit definition), non-placement operator delete shall
14312 be looked up in the scope of the destructor's class and if
14313 found shall be accessible and unambiguous. */
14314 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
14316 /*global_p=*/false,
14317 /*placement=*/NULL_TREE
,
14318 /*alloc_fn=*/NULL_TREE
,
14319 tf_warning_or_error
);
14321 if_stmt
= begin_if_stmt ();
14322 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
14323 current_in_charge_parm
,
14326 finish_expr_stmt (exprstmt
);
14327 finish_then_clause (if_stmt
);
14328 finish_if_stmt (if_stmt
);
14331 if (targetm
.cxx
.cdtor_returns_this ())
14335 val
= DECL_ARGUMENTS (current_function_decl
);
14336 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14337 DECL_RESULT (current_function_decl
), val
);
14338 /* Return the address of the object. */
14339 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14340 add_stmt (exprstmt
);
14344 /* Do the necessary processing for the beginning of a function body, which
14345 in this case includes member-initializers, but not the catch clauses of
14346 a function-try-block. Currently, this means opening a binding level
14347 for the member-initializers (in a ctor), member cleanups (in a dtor),
14348 and capture proxies (in a lambda operator()). */
14351 begin_function_body (void)
14355 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14358 if (processing_template_decl
)
14359 /* Do nothing now. */;
14361 /* Always keep the BLOCK node associated with the outermost pair of
14362 curly braces of a function. These are needed for correct
14363 operation of dwarfout.c. */
14364 keep_next_level (true);
14366 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14368 if (processing_template_decl
)
14369 /* Do nothing now. */;
14370 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14371 begin_destructor_body ();
14376 /* Do the processing for the end of a function body. Currently, this means
14377 closing out the cleanups for fully-constructed bases and members, and in
14378 the case of the destructor, deleting the object if desired. Again, this
14379 is only meaningful for [cd]tors, since they are the only functions where
14380 there is a significant distinction between the main body and any
14381 function catch clauses. Handling, say, main() return semantics here
14382 would be wrong, as flowing off the end of a function catch clause for
14383 main() would also need to return 0. */
14386 finish_function_body (tree compstmt
)
14388 if (compstmt
== NULL_TREE
)
14391 /* Close the block. */
14392 finish_compound_stmt (compstmt
);
14394 if (processing_template_decl
)
14395 /* Do nothing now. */;
14396 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14397 finish_constructor_body ();
14398 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14399 finish_destructor_body ();
14402 /* Given a function, returns the BLOCK corresponding to the outermost level
14403 of curly braces, skipping the artificial block created for constructor
14407 outer_curly_brace_block (tree fndecl
)
14409 tree block
= DECL_INITIAL (fndecl
);
14410 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14412 block
= BLOCK_SUBBLOCKS (block
);
14413 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14415 block
= BLOCK_SUBBLOCKS (block
);
14416 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14420 /* If FNDECL is a class's key method, add the class to the list of
14421 keyed classes that should be emitted. */
14424 record_key_method_defined (tree fndecl
)
14426 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14427 && DECL_VIRTUAL_P (fndecl
)
14428 && !processing_template_decl
)
14430 tree fnclass
= DECL_CONTEXT (fndecl
);
14431 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14432 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14436 /* Subroutine of finish_function.
14437 Save the body of constexpr functions for possible
14438 future compile time evaluation. */
14441 maybe_save_function_definition (tree fun
)
14443 if (!processing_template_decl
14444 && DECL_DECLARED_CONSTEXPR_P (fun
)
14445 && !cp_function_chain
->invalid_constexpr
14446 && !DECL_CLONED_FUNCTION_P (fun
))
14447 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14450 /* Finish up a function declaration and compile that function
14451 all the way to assembler language output. The free the storage
14452 for the function definition.
14454 FLAGS is a bitwise or of the following values:
14456 We just finished processing the body of an in-class inline
14457 function definition. (This processing will have taken place
14458 after the class definition is complete.) */
14461 finish_function (int flags
)
14463 tree fndecl
= current_function_decl
;
14464 tree fntype
, ctype
= NULL_TREE
;
14465 int inclass_inline
= (flags
& 2) != 0;
14467 /* When we get some parse errors, we can end up without a
14468 current_function_decl, so cope. */
14469 if (fndecl
== NULL_TREE
)
14470 return error_mark_node
;
14472 if (c_dialect_objc ())
14473 objc_finish_function ();
14475 gcc_assert (!defer_mark_used_calls
);
14476 defer_mark_used_calls
= true;
14478 record_key_method_defined (fndecl
);
14480 fntype
= TREE_TYPE (fndecl
);
14482 /* TREE_READONLY (fndecl) = 1;
14483 This caused &foo to be of type ptr-to-const-function
14484 which then got a warning when stored in a ptr-to-function variable. */
14486 gcc_assert (building_stmt_list_p ());
14487 /* The current function is being defined, so its DECL_INITIAL should
14488 be set, and unless there's a multiple definition, it should be
14489 error_mark_node. */
14490 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14492 /* For a cloned function, we've already got all the code we need;
14493 there's no need to add any extra bits. */
14494 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14496 /* Make it so that `main' always returns 0 by default. */
14497 if (DECL_MAIN_P (current_function_decl
))
14498 finish_return_stmt (integer_zero_node
);
14500 if (use_eh_spec_block (current_function_decl
))
14501 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14502 (TREE_TYPE (current_function_decl
)),
14503 current_eh_spec_block
);
14506 /* If we're saving up tree structure, tie off the function now. */
14507 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14509 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14510 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14512 finish_fname_decls ();
14514 /* If this function can't throw any exceptions, remember that. */
14515 if (!processing_template_decl
14516 && !cp_function_chain
->can_throw
14517 && !flag_non_call_exceptions
14518 && !decl_replaceable_p (fndecl
))
14519 TREE_NOTHROW (fndecl
) = 1;
14521 /* This must come after expand_function_end because cleanups might
14522 have declarations (from inline functions) that need to go into
14523 this function's blocks. */
14525 /* If the current binding level isn't the outermost binding level
14526 for this function, either there is a bug, or we have experienced
14527 syntax errors and the statement tree is malformed. */
14528 if (current_binding_level
->kind
!= sk_function_parms
)
14530 /* Make sure we have already experienced errors. */
14531 gcc_assert (errorcount
);
14533 /* Throw away the broken statement tree and extra binding
14535 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14537 while (current_binding_level
->kind
!= sk_function_parms
)
14539 if (current_binding_level
->kind
== sk_class
)
14540 pop_nested_class ();
14542 poplevel (0, 0, 0);
14545 poplevel (1, 0, 1);
14547 /* Statements should always be full-expressions at the outermost set
14548 of curly braces for a function. */
14549 gcc_assert (stmts_are_full_exprs_p ());
14551 /* If there are no return statements in a function with auto return type,
14552 the return type is void. But if the declared type is something like
14553 auto*, this is an error. */
14554 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14555 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14557 if (!is_auto (current_function_auto_return_pattern
)
14558 && !current_function_returns_value
&& !current_function_returns_null
)
14560 error ("no return statements in function returning %qT",
14561 current_function_auto_return_pattern
);
14562 inform (input_location
, "only plain %<auto%> return type can be "
14563 "deduced to %<void%>");
14565 apply_deduced_return_type (fndecl
, void_type_node
);
14566 fntype
= TREE_TYPE (fndecl
);
14569 // If this is a concept, check that the definition is reasonable.
14570 if (DECL_DECLARED_CONCEPT_P (fndecl
))
14571 check_function_concept (fndecl
);
14573 /* Save constexpr function body before it gets munged by
14574 the NRV transformation. */
14575 maybe_save_function_definition (fndecl
);
14577 /* Set up the named return value optimization, if we can. Candidate
14578 variables are selected in check_return_expr. */
14579 if (current_function_return_value
)
14581 tree r
= current_function_return_value
;
14584 if (r
!= error_mark_node
14585 /* This is only worth doing for fns that return in memory--and
14586 simpler, since we don't have to worry about promoted modes. */
14587 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14588 /* Only allow this for variables declared in the outer scope of
14589 the function so we know that their lifetime always ends with a
14590 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14591 we were to do this optimization in tree-ssa. */
14592 && (outer
= outer_curly_brace_block (fndecl
))
14593 && chain_member (r
, BLOCK_VARS (outer
)))
14594 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14596 current_function_return_value
= NULL_TREE
;
14599 /* Remember that we were in class scope. */
14600 if (current_class_name
)
14601 ctype
= current_class_type
;
14603 /* Must mark the RESULT_DECL as being in this function. */
14604 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14606 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14607 to the FUNCTION_DECL node itself. */
14608 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14610 /* Save away current state, if appropriate. */
14611 if (!processing_template_decl
)
14612 save_function_data (fndecl
);
14614 /* Complain if there's just no return statement. */
14615 if (warn_return_type
14616 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14617 && !dependent_type_p (TREE_TYPE (fntype
))
14618 && !current_function_returns_value
&& !current_function_returns_null
14619 /* Don't complain if we abort or throw. */
14620 && !current_function_returns_abnormally
14621 /* Don't complain if there's an infinite loop. */
14622 && !current_function_infinite_loop
14623 /* Don't complain if we are declared noreturn. */
14624 && !TREE_THIS_VOLATILE (fndecl
)
14625 && !DECL_NAME (DECL_RESULT (fndecl
))
14626 && !TREE_NO_WARNING (fndecl
)
14627 /* Structor return values (if any) are set by the compiler. */
14628 && !DECL_CONSTRUCTOR_P (fndecl
)
14629 && !DECL_DESTRUCTOR_P (fndecl
)
14630 && targetm
.warn_func_return (fndecl
))
14632 warning (OPT_Wreturn_type
,
14633 "no return statement in function returning non-void");
14634 TREE_NO_WARNING (fndecl
) = 1;
14637 /* Store the end of the function, so that we get good line number
14638 info for the epilogue. */
14639 cfun
->function_end_locus
= input_location
;
14641 /* Complain about parameters that are only set, but never otherwise used. */
14642 if (warn_unused_but_set_parameter
14643 && !processing_template_decl
14644 && errorcount
== unused_but_set_errorcount
14645 && !DECL_CLONED_FUNCTION_P (fndecl
))
14649 for (decl
= DECL_ARGUMENTS (fndecl
);
14651 decl
= DECL_CHAIN (decl
))
14652 if (TREE_USED (decl
)
14653 && TREE_CODE (decl
) == PARM_DECL
14654 && !DECL_READ_P (decl
)
14655 && DECL_NAME (decl
)
14656 && !DECL_ARTIFICIAL (decl
)
14657 && !TREE_NO_WARNING (decl
)
14658 && !DECL_IN_SYSTEM_HEADER (decl
)
14659 && TREE_TYPE (decl
) != error_mark_node
14660 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14661 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14662 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14663 warning_at (DECL_SOURCE_LOCATION (decl
),
14664 OPT_Wunused_but_set_parameter
,
14665 "parameter %qD set but not used", decl
);
14666 unused_but_set_errorcount
= errorcount
;
14669 /* Complain about locally defined typedefs that are not used in this
14671 maybe_warn_unused_local_typedefs ();
14673 /* Possibly warn about unused parameters. */
14674 if (warn_unused_parameter
14675 && !processing_template_decl
14676 && !DECL_CLONED_FUNCTION_P (fndecl
))
14677 do_warn_unused_parameter (fndecl
);
14679 /* Genericize before inlining. */
14680 if (!processing_template_decl
)
14682 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14683 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14684 cp_genericize (fndecl
);
14685 /* Clear out the bits we don't need. */
14686 f
->x_current_class_ptr
= NULL
;
14687 f
->x_current_class_ref
= NULL
;
14688 f
->x_eh_spec_block
= NULL
;
14689 f
->x_in_charge_parm
= NULL
;
14690 f
->x_vtt_parm
= NULL
;
14691 f
->x_return_value
= NULL
;
14692 f
->bindings
= NULL
;
14693 f
->extern_decl_map
= NULL
;
14694 f
->infinite_loops
= NULL
;
14696 /* Clear out the bits we don't need. */
14697 local_names
= NULL
;
14699 /* We're leaving the context of this function, so zap cfun. It's still in
14700 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14702 current_function_decl
= NULL
;
14704 /* If this is an in-class inline definition, we may have to pop the
14705 bindings for the template parameters that we added in
14706 maybe_begin_member_template_processing when start_function was
14708 if (inclass_inline
)
14709 maybe_end_member_template_processing ();
14711 /* Leave the scope of the class. */
14713 pop_nested_class ();
14718 current_function_decl
= NULL_TREE
;
14720 defer_mark_used_calls
= false;
14721 if (deferred_mark_used_calls
)
14726 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14728 vec_free (deferred_mark_used_calls
);
14731 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14735 /* Create the FUNCTION_DECL for a function definition.
14736 DECLSPECS and DECLARATOR are the parts of the declaration;
14737 they describe the return type and the name of the function,
14738 but twisted together in a fashion that parallels the syntax of C.
14740 This function creates a binding context for the function body
14741 as well as setting up the FUNCTION_DECL in current_function_decl.
14743 Returns a FUNCTION_DECL on success.
14745 If the DECLARATOR is not suitable for a function (it defines a datum
14746 instead), we return 0, which tells yyparse to report a parse error.
14748 May return void_type_node indicating that this method is actually
14749 a friend. See grokfield for more details.
14751 Came here with a `.pushlevel' .
14753 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14754 CHANGES TO CODE IN `grokfield'. */
14757 grokmethod (cp_decl_specifier_seq
*declspecs
,
14758 const cp_declarator
*declarator
, tree attrlist
)
14760 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14763 if (fndecl
== error_mark_node
)
14764 return error_mark_node
;
14766 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14768 error ("invalid member function declaration");
14769 return error_mark_node
;
14773 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14775 /* Pass friends other than inline friend functions back. */
14776 if (fndecl
== void_type_node
)
14779 if (DECL_IN_AGGR_P (fndecl
))
14781 if (DECL_CLASS_SCOPE_P (fndecl
))
14782 error ("%qD is already defined in class %qT", fndecl
,
14783 DECL_CONTEXT (fndecl
));
14784 return error_mark_node
;
14787 check_template_shadow (fndecl
);
14789 if (TREE_PUBLIC (fndecl
))
14790 DECL_COMDAT (fndecl
) = 1;
14791 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14792 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14794 /* We process method specializations in finish_struct_1. */
14795 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14797 fndecl
= push_template_decl (fndecl
);
14798 if (fndecl
== error_mark_node
)
14802 if (! DECL_FRIEND_P (fndecl
))
14804 if (DECL_CHAIN (fndecl
))
14806 fndecl
= copy_node (fndecl
);
14807 TREE_CHAIN (fndecl
) = NULL_TREE
;
14811 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14813 DECL_IN_AGGR_P (fndecl
) = 1;
14818 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14819 we can lay it out later, when and if its type becomes complete.
14821 Also handle constexpr variables where the initializer involves
14822 an unlowered PTRMEM_CST because the class isn't complete yet. */
14825 maybe_register_incomplete_var (tree var
)
14827 gcc_assert (VAR_P (var
));
14829 /* Keep track of variables with incomplete types. */
14830 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14831 && DECL_EXTERNAL (var
))
14833 tree inner_type
= TREE_TYPE (var
);
14835 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14836 inner_type
= TREE_TYPE (inner_type
);
14837 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14839 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14840 /* RTTI TD entries are created while defining the type_info. */
14841 || (TYPE_LANG_SPECIFIC (inner_type
)
14842 && TYPE_BEING_DEFINED (inner_type
)))
14844 incomplete_var iv
= {var
, inner_type
};
14845 vec_safe_push (incomplete_vars
, iv
);
14847 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14848 && decl_constant_var_p (var
)
14849 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14851 /* When the outermost open class is complete we can resolve any
14852 pointers-to-members. */
14853 tree context
= outermost_open_class ();
14854 incomplete_var iv
= {var
, context
};
14855 vec_safe_push (incomplete_vars
, iv
);
14860 /* Called when a class type (given by TYPE) is defined. If there are
14861 any existing VAR_DECLs whose type has been completed by this
14862 declaration, update them now. */
14865 complete_vars (tree type
)
14868 incomplete_var
*iv
;
14870 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14872 if (same_type_p (type
, iv
->incomplete_type
))
14874 tree var
= iv
->decl
;
14875 tree type
= TREE_TYPE (var
);
14877 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14878 == iv
->incomplete_type
)
14880 /* Complete the type of the variable. The VAR_DECL itself
14881 will be laid out in expand_expr. */
14882 complete_type (type
);
14883 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14886 /* Remove this entry from the list. */
14887 incomplete_vars
->unordered_remove (ix
);
14893 /* Check for pending declarations which may have abstract type. */
14894 complete_type_check_abstract (type
);
14897 /* If DECL is of a type which needs a cleanup, build and return an
14898 expression to perform that cleanup here. Return NULL_TREE if no
14899 cleanup need be done. */
14902 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14908 /* Assume no cleanup is required. */
14909 cleanup
= NULL_TREE
;
14911 if (error_operand_p (decl
))
14914 /* Handle "__attribute__((cleanup))". We run the cleanup function
14915 before the destructor since the destructor is what actually
14916 terminates the lifetime of the object. */
14917 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14924 /* Get the name specified by the user for the cleanup function. */
14925 id
= TREE_VALUE (TREE_VALUE (attr
));
14926 /* Look up the name to find the cleanup function to call. It is
14927 important to use lookup_name here because that is what is
14928 used in c-common.c:handle_cleanup_attribute when performing
14929 initial checks on the attribute. Note that those checks
14930 include ensuring that the function found is not an overloaded
14931 function, or an object with an overloaded call operator,
14932 etc.; we can rely on the fact that the function found is an
14933 ordinary FUNCTION_DECL. */
14934 fn
= lookup_name (id
);
14935 arg
= build_address (decl
);
14936 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14937 return error_mark_node
;
14938 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14939 if (cleanup
== error_mark_node
)
14940 return error_mark_node
;
14942 /* Handle ordinary C++ destructors. */
14943 type
= TREE_TYPE (decl
);
14944 if (type_build_dtor_call (type
))
14946 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14950 if (TREE_CODE (type
) == ARRAY_TYPE
)
14953 addr
= build_address (decl
);
14955 call
= build_delete (TREE_TYPE (addr
), addr
,
14956 sfk_complete_destructor
, flags
, 0, complain
);
14957 if (call
== error_mark_node
)
14958 cleanup
= error_mark_node
;
14959 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14960 /* Discard the call. */;
14962 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14967 /* build_delete sets the location of the destructor call to the
14968 current location, even though the destructor is going to be
14969 called later, at the end of the current scope. This can lead to
14970 a "jumpy" behaviour for users of debuggers when they step around
14971 the end of the block. So let's unset the location of the
14972 destructor call instead. */
14973 protected_set_expr_location (cleanup
, UNKNOWN_LOCATION
);
14976 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14977 /* Treat objects with destructors as used; the destructor may do
14978 something substantive. */
14979 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14980 return error_mark_node
;
14986 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14987 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14988 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14991 static_fn_type (tree memfntype
)
14996 if (TYPE_PTRMEMFUNC_P (memfntype
))
14997 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14998 if (POINTER_TYPE_P (memfntype
)
14999 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
15000 memfntype
= TREE_TYPE (memfntype
);
15001 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
15003 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
15004 args
= TYPE_ARG_TYPES (memfntype
);
15005 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
15006 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
15007 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
15008 fntype
= (cp_build_type_attribute_variant
15009 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
15010 fntype
= (build_exception_variant
15011 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
15012 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
15013 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
15017 /* DECL was originally constructed as a non-static member function,
15018 but turned out to be static. Update it accordingly. */
15021 revert_static_member_fn (tree decl
)
15023 tree stype
= static_fn_type (decl
);
15024 cp_cv_quals quals
= type_memfn_quals (stype
);
15025 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
15027 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
15028 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
15030 TREE_TYPE (decl
) = stype
;
15032 if (DECL_ARGUMENTS (decl
))
15033 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
15034 DECL_STATIC_FUNCTION_P (decl
) = 1;
15037 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
15038 one of the language-independent trees. */
15040 enum cp_tree_node_structure_enum
15041 cp_tree_node_structure (union lang_tree_node
* t
)
15043 switch (TREE_CODE (&t
->generic
))
15045 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
15046 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
15047 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
15048 case OVERLOAD
: return TS_CP_OVERLOAD
;
15049 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
15050 case PTRMEM_CST
: return TS_CP_PTRMEM
;
15051 case BASELINK
: return TS_CP_BASELINK
;
15052 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
15053 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
15054 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
15055 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
15056 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
15057 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
15058 case CONSTRAINT_INFO
: return TS_CP_CONSTRAINT_INFO
;
15059 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
15060 default: return TS_CP_GENERIC
;
15064 /* Build the void_list_node (void_type_node having been created). */
15066 build_void_list_node (void)
15068 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
15073 cp_missing_noreturn_ok_p (tree decl
)
15075 /* A missing noreturn is ok for the `main' function. */
15076 return DECL_MAIN_P (decl
);
15079 /* Return the decl used to identify the COMDAT group into which DECL should
15083 cxx_comdat_group (tree decl
)
15085 /* Virtual tables, construction virtual tables, and virtual table
15086 tables all go in a single COMDAT group, named after the primary
15088 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
15089 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
15090 /* For all other DECLs, the COMDAT group is the mangled name of the
15091 declaration itself. */
15094 while (DECL_THUNK_P (decl
))
15096 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
15097 into the same section as the target function. In that case
15098 we must return target's name. */
15099 tree target
= THUNK_TARGET (decl
);
15100 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
15101 && DECL_SECTION_NAME (target
) != NULL
15102 && DECL_ONE_ONLY (target
))
15112 /* Returns the return type for FN as written by the user, which may include
15113 a placeholder for a deduced return type. */
15116 fndecl_declared_return_type (tree fn
)
15118 fn
= STRIP_TEMPLATE (fn
);
15119 if (FNDECL_USED_AUTO (fn
))
15121 struct language_function
*f
= NULL
;
15122 if (DECL_STRUCT_FUNCTION (fn
))
15123 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
15125 f
= DECL_SAVED_FUNCTION_DATA (fn
);
15126 return f
->x_auto_return_pattern
;
15128 return TREE_TYPE (TREE_TYPE (fn
));
15131 /* Returns true iff DECL was declared with an auto return type and it has
15132 not yet been deduced to a real type. */
15135 undeduced_auto_decl (tree decl
)
15137 if (cxx_dialect
< cxx14
)
15139 return type_uses_auto (TREE_TYPE (decl
));
15142 /* Complain if DECL has an undeduced return type. */
15145 require_deduced_type (tree decl
)
15147 if (undeduced_auto_decl (decl
))
15148 error ("use of %qD before deduction of %<auto%>", decl
);
15151 #include "gt-cp-decl.h"