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"
40 #include "tree-hasher.h"
41 #include "stringpool.h"
42 #include "stor-layout.h"
48 #include "tree-iterator.h"
49 #include "tree-inline.h"
56 #include "c-family/c-common.h"
57 #include "c-family/c-objc.h"
58 #include "c-family/c-pragma.h"
59 #include "c-family/c-target.h"
60 #include "c-family/c-ubsan.h"
61 #include "diagnostic.h"
65 #include "splay-tree.h"
69 #include "plugin-api.h"
70 #include "hard-reg-set.h"
78 /* Possible cases of bad specifiers type used by bad_specifiers. */
80 BSP_VAR
, /* variable */
81 BSP_PARM
, /* parameter */
86 static tree
grokparms (tree parmlist
, tree
*);
87 static const char *redeclaration_error_message (tree
, tree
);
89 static int decl_jump_unsafe (tree
);
90 static void require_complete_types_for_parms (tree
);
91 static int ambi_op_p (enum tree_code
);
92 static int unary_op_p (enum tree_code
);
93 static void push_local_name (tree
);
94 static tree
grok_reference_init (tree
, tree
, tree
, int);
95 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
97 static int check_static_variable_definition (tree
, tree
);
98 static void record_unknown_type (tree
, const char *);
99 static tree
builtin_function_1 (tree
, tree
, bool);
100 static int member_function_or_else (tree
, tree
, enum overload_flags
);
101 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
103 static void check_for_uninitialized_const_var (tree
);
104 static tree
local_variable_p_walkfn (tree
*, int *, void *);
105 static tree
record_builtin_java_type (const char *, int);
106 static const char *tag_name (enum tag_types
);
107 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
108 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
109 static void maybe_deduce_size_from_array_init (tree
, tree
);
110 static void layout_var_decl (tree
);
111 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
112 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
113 static void save_function_data (tree
);
114 static void copy_type_enum (tree
, tree
);
115 static void check_function_type (tree
, tree
);
116 static void finish_constructor_body (void);
117 static void begin_destructor_body (void);
118 static void finish_destructor_body (void);
119 static void record_key_method_defined (tree
);
120 static tree
create_array_type_for_decl (tree
, tree
, tree
);
121 static tree
get_atexit_node (void);
122 static tree
get_dso_handle_node (void);
123 static tree
start_cleanup_fn (void);
124 static void end_cleanup_fn (void);
125 static tree
cp_make_fname_decl (location_t
, tree
, int);
126 static void initialize_predefined_identifiers (void);
127 static tree check_special_function_return_type
128 (special_function_kind
, tree
, tree
);
129 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
130 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
131 static void store_parm_decls (tree
);
132 static void initialize_local_var (tree
, tree
);
133 static void expand_static_init (tree
, tree
);
135 /* The following symbols are subsumed in the cp_global_trees array, and
136 listed here individually for documentation purposes.
139 tree wchar_decl_node;
141 tree vtable_entry_type;
142 tree delta_type_node;
143 tree __t_desc_type_node;
145 tree class_type_node;
146 tree unknown_type_node;
148 Array type `vtable_entry_type[]'
151 tree vtbl_ptr_type_node;
158 A FUNCTION_DECL which can call `abort'. Not necessarily the
159 one that the user will declare, but sufficient to be called
160 by routines that want to abort the program.
165 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
166 tree tinfo_var_id; */
168 tree cp_global_trees
[CPTI_MAX
];
170 /* Indicates that there is a type value in some namespace, although
171 that is not necessarily in scope at the moment. */
173 tree global_type_node
;
175 /* The node that holds the "name" of the global scope. */
176 tree global_scope_name
;
178 #define local_names cp_function_chain->x_local_names
180 /* A list of objects which have constructors or destructors
181 which reside in the global scope. The decl is stored in
182 the TREE_VALUE slot and the initializer is stored
183 in the TREE_PURPOSE slot. */
184 tree static_aggregates
;
186 /* Like static_aggregates, but for thread_local variables. */
191 /* A node for the integer constant 2. */
193 tree integer_two_node
;
195 /* Used only for jumps to as-yet undefined labels, since jumps to
196 defined labels can have their validity checked immediately. */
198 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
199 struct named_label_use_entry
*next
;
200 /* The binding level to which this entry is *currently* attached.
201 This is initially the binding level in which the goto appeared,
202 but is modified as scopes are closed. */
203 cp_binding_level
*binding_level
;
204 /* The head of the names list that was current when the goto appeared,
205 or the inner scope popped. These are the decls that will *not* be
206 skipped when jumping to the label. */
208 /* The location of the goto, for error reporting. */
209 location_t o_goto_locus
;
210 /* True if an OpenMP structured block scope has been closed since
211 the goto appeared. This means that the branch from the label will
212 illegally exit an OpenMP scope. */
216 /* A list of all LABEL_DECLs in the function that have names. Here so
217 we can clear out their names' definitions at the end of the
218 function, and so we can check the validity of jumps to these labels. */
220 struct GTY((for_user
)) named_label_entry
{
221 /* The decl itself. */
224 /* The binding level to which the label is *currently* attached.
225 This is initially set to the binding level in which the label
226 is defined, but is modified as scopes are closed. */
227 cp_binding_level
*binding_level
;
228 /* The head of the names list that was current when the label was
229 defined, or the inner scope popped. These are the decls that will
230 be skipped when jumping to the label. */
232 /* A vector of all decls from all binding levels that would be
233 crossed by a backward branch to the label. */
234 vec
<tree
, va_gc
> *bad_decls
;
236 /* A list of uses of the label, before the label is defined. */
237 struct named_label_use_entry
*uses
;
239 /* The following bits are set after the label is defined, and are
240 updated as scopes are popped. They indicate that a backward jump
241 to the label will illegally enter a scope of the given flavor. */
247 #define named_labels cp_function_chain->x_named_labels
249 /* The number of function bodies which we are currently processing.
250 (Zero if we are at namespace scope, one inside the body of a
251 function, two inside the body of a function in a local class, etc.) */
254 /* To avoid unwanted recursion, finish_function defers all mark_used calls
255 encountered during its execution until it finishes. */
256 bool defer_mark_used_calls
;
257 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
259 /* States indicating how grokdeclarator() should handle declspecs marked
260 with __attribute__((deprecated)). An object declared as
261 __attribute__((deprecated)) suppresses warnings of uses of other
263 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
266 /* A list of VAR_DECLs whose type was incomplete at the time the
267 variable was declared. */
269 typedef struct GTY(()) incomplete_var_d
{
271 tree incomplete_type
;
275 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
277 /* Returns the kind of template specialization we are currently
278 processing, given that it's declaration contained N_CLASS_SCOPES
279 explicit scope qualifications. */
282 current_tmpl_spec_kind (int n_class_scopes
)
284 int n_template_parm_scopes
= 0;
285 int seen_specialization_p
= 0;
286 int innermost_specialization_p
= 0;
289 /* Scan through the template parameter scopes. */
290 for (b
= current_binding_level
;
291 b
->kind
== sk_template_parms
;
294 /* If we see a specialization scope inside a parameter scope,
295 then something is wrong. That corresponds to a declaration
298 template <class T> template <> ...
300 which is always invalid since [temp.expl.spec] forbids the
301 specialization of a class member template if the enclosing
302 class templates are not explicitly specialized as well. */
303 if (b
->explicit_spec_p
)
305 if (n_template_parm_scopes
== 0)
306 innermost_specialization_p
= 1;
308 seen_specialization_p
= 1;
310 else if (seen_specialization_p
== 1)
311 return tsk_invalid_member_spec
;
313 ++n_template_parm_scopes
;
316 /* Handle explicit instantiations. */
317 if (processing_explicit_instantiation
)
319 if (n_template_parm_scopes
!= 0)
320 /* We've seen a template parameter list during an explicit
321 instantiation. For example:
323 template <class T> template void f(int);
325 This is erroneous. */
326 return tsk_invalid_expl_inst
;
328 return tsk_expl_inst
;
331 if (n_template_parm_scopes
< n_class_scopes
)
332 /* We've not seen enough template headers to match all the
333 specialized classes present. For example:
335 template <class T> void R<T>::S<T>::f(int);
337 This is invalid; there needs to be one set of template
338 parameters for each class. */
339 return tsk_insufficient_parms
;
340 else if (n_template_parm_scopes
== n_class_scopes
)
341 /* We're processing a non-template declaration (even though it may
342 be a member of a template class.) For example:
344 template <class T> void S<T>::f(int);
346 The `class T' matches the `S<T>', leaving no template headers
347 corresponding to the `f'. */
349 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
350 /* We've got too many template headers. For example:
352 template <> template <class T> void f (T);
354 There need to be more enclosing classes. */
355 return tsk_excessive_parms
;
357 /* This must be a template. It's of the form:
359 template <class T> template <class U> void S<T>::f(U);
361 This is a specialization if the innermost level was a
362 specialization; otherwise it's just a definition of the
364 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
367 /* Exit the current scope. */
375 /* When a label goes out of scope, check to see if that label was used
376 in a valid manner, and issue any appropriate warnings or errors. */
379 pop_label (tree label
, tree old_value
)
381 if (!processing_template_decl
)
383 if (DECL_INITIAL (label
) == NULL_TREE
)
387 error ("label %q+D used but not defined", label
);
388 location
= input_location
;
389 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
390 /* Avoid crashing later. */
391 define_label (location
, DECL_NAME (label
));
394 warn_for_unused_label (label
);
397 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
400 /* At the end of a function, all labels declared within the function
401 go out of scope. BLOCK is the top-level block for the
405 pop_labels_1 (named_label_entry
**slot
, tree block
)
407 struct named_label_entry
*ent
= *slot
;
409 pop_label (ent
->label_decl
, NULL_TREE
);
411 /* Put the labels into the "variables" of the top-level block,
412 so debugger can see them. */
413 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
414 BLOCK_VARS (block
) = ent
->label_decl
;
416 named_labels
->clear_slot (slot
);
422 pop_labels (tree block
)
426 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
431 /* At the end of a block with local labels, restore the outer definition. */
434 pop_local_label (tree label
, tree old_value
)
436 struct named_label_entry dummy
;
438 pop_label (label
, old_value
);
440 dummy
.label_decl
= label
;
441 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
442 named_labels
->clear_slot (slot
);
445 /* The following two routines are used to interface to Objective-C++.
446 The binding level is purposely treated as an opaque type. */
449 objc_get_current_scope (void)
451 return current_binding_level
;
454 /* The following routine is used by the NeXT-style SJLJ exceptions;
455 variables get marked 'volatile' so as to not be clobbered by
456 _setjmp()/_longjmp() calls. All variables in the current scope,
457 as well as parent scopes up to (but not including) ENCLOSING_BLK
458 shall be thusly marked. */
461 objc_mark_locals_volatile (void *enclosing_blk
)
463 cp_binding_level
*scope
;
465 for (scope
= current_binding_level
;
466 scope
&& scope
!= enclosing_blk
;
467 scope
= scope
->level_chain
)
471 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
472 objc_volatilize_decl (decl
);
474 /* Do not climb up past the current function. */
475 if (scope
->kind
== sk_function_parms
)
480 /* Update data for defined and undefined labels when leaving a scope. */
483 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
485 named_label_entry
*ent
= *slot
;
486 cp_binding_level
*obl
= bl
->level_chain
;
488 if (ent
->binding_level
== bl
)
492 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
493 TREE_LISTs representing OVERLOADs, so be careful. */
494 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
496 : TREE_CHAIN (decl
)))
497 if (decl_jump_unsafe (decl
))
498 vec_safe_push (ent
->bad_decls
, decl
);
500 ent
->binding_level
= obl
;
501 ent
->names_in_scope
= obl
->names
;
505 ent
->in_try_scope
= true;
508 ent
->in_catch_scope
= true;
511 ent
->in_omp_scope
= true;
519 struct named_label_use_entry
*use
;
521 for (use
= ent
->uses
; use
; use
= use
->next
)
522 if (use
->binding_level
== bl
)
524 use
->binding_level
= obl
;
525 use
->names_in_scope
= obl
->names
;
526 if (bl
->kind
== sk_omp
)
527 use
->in_omp_scope
= true;
534 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
535 when errors were reported, except for -Werror-unused-but-set-*. */
536 static int unused_but_set_errorcount
;
538 /* Exit a binding level.
539 Pop the level off, and restore the state of the identifier-decl mappings
540 that were in effect when this level was entered.
542 If KEEP == 1, this level had explicit declarations, so
543 and create a "block" (a BLOCK node) for the level
544 to record its declarations and subblocks for symbol table output.
546 If FUNCTIONBODY is nonzero, this level is the body of a function,
547 so create a block as if KEEP were set and also clear out all
550 If REVERSE is nonzero, reverse the order of decls before putting
551 them into the BLOCK. */
554 poplevel (int keep
, int reverse
, int functionbody
)
557 /* The chain of decls was accumulated in reverse order.
558 Put it into forward order, just for cleanliness. */
563 int leaving_for_scope
;
566 cp_label_binding
*label_bind
;
568 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
573 gcc_assert (current_binding_level
->kind
!= sk_class
);
575 if (current_binding_level
->kind
== sk_cleanup
)
577 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
579 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
581 /* We used to use KEEP == 2 to indicate that the new block should go
582 at the beginning of the list of blocks at this binding level,
583 rather than the end. This hack is no longer used. */
584 gcc_assert (keep
== 0 || keep
== 1);
586 if (current_binding_level
->keep
)
589 /* Any uses of undefined labels, and any defined labels, now operate
590 under constraints of next binding contour. */
591 if (cfun
&& !functionbody
&& named_labels
)
592 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
593 (current_binding_level
);
595 /* Get the decls in the order they were written.
596 Usually current_binding_level->names is in reverse order.
597 But parameter decls were previously put in forward order. */
600 current_binding_level
->names
601 = decls
= nreverse (current_binding_level
->names
);
603 decls
= current_binding_level
->names
;
605 /* If there were any declarations or structure tags in that level,
606 or if this level is a function body,
607 create a BLOCK to record them for the life of this function. */
609 /* Avoid function body block if possible. */
610 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
612 else if (keep
== 1 || functionbody
)
613 block
= make_node (BLOCK
);
614 if (block
!= NULL_TREE
)
616 BLOCK_VARS (block
) = decls
;
617 BLOCK_SUBBLOCKS (block
) = subblocks
;
620 /* In each subblock, record that this is its superior. */
622 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
623 BLOCK_SUPERCONTEXT (link
) = block
;
625 /* We still support the old for-scope rules, whereby the variables
626 in a for-init statement were in scope after the for-statement
627 ended. We only use the new rules if flag_new_for_scope is
630 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
632 /* Before we remove the declarations first check for unused variables. */
633 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
634 && current_binding_level
->kind
!= sk_template_parms
635 && !processing_template_decl
)
636 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
638 /* There are cases where D itself is a TREE_LIST. See in
639 push_local_binding where the list of decls returned by
640 getdecls is built. */
641 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
642 tree type
= TREE_TYPE (decl
);
644 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
645 && ! DECL_IN_SYSTEM_HEADER (decl
)
646 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
647 && type
!= error_mark_node
648 && (!CLASS_TYPE_P (type
)
649 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
650 || lookup_attribute ("warn_unused",
651 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
653 if (! TREE_USED (decl
))
654 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
655 else if (DECL_CONTEXT (decl
) == current_function_decl
656 // For -Wunused-but-set-variable leave references alone.
657 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
658 && errorcount
== unused_but_set_errorcount
)
660 warning (OPT_Wunused_but_set_variable
,
661 "variable %q+D set but not used", decl
);
662 unused_but_set_errorcount
= errorcount
;
667 /* Remove declarations for all the DECLs in this level. */
668 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
670 if (leaving_for_scope
&& VAR_P (link
)
671 /* It's hard to make this ARM compatibility hack play nicely with
672 lambdas, and it really isn't necessary in C++11 mode. */
673 && cxx_dialect
< cxx11
676 tree name
= DECL_NAME (link
);
680 ob
= outer_binding (name
,
681 IDENTIFIER_BINDING (name
),
684 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
686 ns_binding
= NULL_TREE
;
688 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
689 /* We have something like:
694 and we are leaving the `for' scope. There's no reason to
695 keep the binding of the inner `i' in this case. */
696 pop_binding (name
, link
);
697 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
698 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
699 /* Here, we have something like:
707 We must pop the for-scope binding so we know what's a
708 type and what isn't. */
709 pop_binding (name
, link
);
712 /* Mark this VAR_DECL as dead so that we can tell we left it
713 there only for backward compatibility. */
714 DECL_DEAD_FOR_LOCAL (link
) = 1;
716 /* Keep track of what should have happened when we
717 popped the binding. */
720 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
721 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
724 /* Add it to the list of dead variables in the next
725 outermost binding to that we can remove these when we
726 leave that binding. */
728 current_binding_level
->level_chain
->dead_vars_from_for
,
731 /* Although we don't pop the cxx_binding, we do clear
732 its SCOPE since the scope is going away now. */
733 IDENTIFIER_BINDING (name
)->scope
734 = current_binding_level
->level_chain
;
741 /* Remove the binding. */
744 if (TREE_CODE (decl
) == TREE_LIST
)
745 decl
= TREE_VALUE (decl
);
748 if (TREE_CODE (name
) == OVERLOAD
)
749 name
= OVL_FUNCTION (name
);
751 gcc_assert (DECL_P (name
));
752 pop_binding (DECL_NAME (name
), decl
);
756 /* Remove declarations for any `for' variables from inner scopes
757 that we kept around. */
758 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
760 pop_binding (DECL_NAME (decl
), decl
);
762 /* Restore the IDENTIFIER_TYPE_VALUEs. */
763 for (link
= current_binding_level
->type_shadowed
;
764 link
; link
= TREE_CHAIN (link
))
765 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
767 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
768 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
770 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
772 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
773 list if a `using' declaration put them there. The debugging
774 back ends won't understand OVERLOAD, so we remove them here.
775 Because the BLOCK_VARS are (temporarily) shared with
776 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
777 popped all the bindings. */
782 for (d
= &BLOCK_VARS (block
); *d
; )
784 if (TREE_CODE (*d
) == TREE_LIST
)
785 *d
= TREE_CHAIN (*d
);
787 d
= &DECL_CHAIN (*d
);
791 /* If the level being exited is the top level of a function,
792 check over all the labels. */
797 /* Since this is the top level block of a function, the vars are
798 the function's parameters. Don't leave them in the BLOCK
799 because they are found in the FUNCTION_DECL instead. */
800 BLOCK_VARS (block
) = 0;
804 pop_labels (subblocks
);
807 kind
= current_binding_level
->kind
;
808 if (kind
== sk_cleanup
)
812 /* If this is a temporary binding created for a cleanup, then we'll
813 have pushed a statement list level. Pop that, create a new
814 BIND_EXPR for the block, and insert it into the stream. */
815 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
816 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
823 /* The current function is being defined, so its DECL_INITIAL
824 should be error_mark_node. */
825 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
826 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
829 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
831 if (BLOCK_SUBBLOCKS (subblocks
))
832 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
835 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
839 current_binding_level
->blocks
840 = block_chainon (current_binding_level
->blocks
, block
);
842 /* If we did not make a block for the level just exited,
843 any blocks made for inner levels
844 (since they cannot be recorded as subblocks in that level)
845 must be carried forward so they will later become subblocks
846 of something else. */
848 current_binding_level
->blocks
849 = block_chainon (current_binding_level
->blocks
, subblocks
);
851 /* Each and every BLOCK node created here in `poplevel' is important
852 (e.g. for proper debugging information) so if we created one
853 earlier, mark it as "used". */
855 TREE_USED (block
) = 1;
857 /* All temporary bindings created for cleanups are popped silently. */
858 if (kind
== sk_cleanup
)
861 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
865 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
866 itself, calling F for each. The DATA is passed to F as well. */
869 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
872 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
874 result
|= (*f
) (name_space
, data
);
876 for (; current
; current
= DECL_CHAIN (current
))
877 result
|= walk_namespaces_r (current
, f
, data
);
882 /* Walk all the namespaces, calling F for each. The DATA is passed to
886 walk_namespaces (walk_namespaces_fn f
, void* data
)
888 return walk_namespaces_r (global_namespace
, f
, data
);
891 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
892 DATA is non-NULL, this is the last time we will call
893 wrapup_global_declarations for this NAMESPACE. */
896 wrapup_globals_for_namespace (tree name_space
, void* data
)
898 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
899 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
900 tree
*vec
= statics
->address ();
901 int len
= statics
->length ();
902 int last_time
= (data
!= 0);
906 check_global_declarations (vec
, len
);
907 emit_debug_global_declarations (vec
, len
);
911 /* Write out any globals that need to be output. */
912 return wrapup_global_declarations (vec
, len
);
916 /* In C++, you don't have to write `struct S' to refer to `S'; you
917 can just use `S'. We accomplish this by creating a TYPE_DECL as
918 if the user had written `typedef struct S S'. Create and return
919 the TYPE_DECL for TYPE. */
922 create_implicit_typedef (tree name
, tree type
)
926 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
927 DECL_ARTIFICIAL (decl
) = 1;
928 /* There are other implicit type declarations, like the one *within*
929 a class that allows you to write `S::S'. We must distinguish
931 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
932 TYPE_NAME (type
) = decl
;
933 TYPE_STUB_DECL (type
) = decl
;
938 /* Remember a local name for name-mangling purposes. */
941 push_local_name (tree decl
)
946 timevar_start (TV_NAME_LOOKUP
);
948 name
= DECL_NAME (decl
);
950 nelts
= vec_safe_length (local_names
);
951 for (i
= 0; i
< nelts
; i
++)
953 t
= (*local_names
)[i
];
954 if (DECL_NAME (t
) == name
)
956 if (!DECL_LANG_SPECIFIC (decl
))
957 retrofit_lang_decl (decl
);
958 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
959 if (DECL_DISCRIMINATOR_SET_P (t
))
960 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
962 DECL_DISCRIMINATOR (decl
) = 1;
964 (*local_names
)[i
] = decl
;
965 timevar_stop (TV_NAME_LOOKUP
);
970 vec_safe_push (local_names
, decl
);
971 timevar_stop (TV_NAME_LOOKUP
);
974 /* Subroutine of duplicate_decls: return truthvalue of whether
975 or not types of these decls match.
977 For C++, we must compare the parameter list so that `int' can match
978 `int&' in a parameter position, but `int&' is not confused with
982 decls_match (tree newdecl
, tree olddecl
)
986 if (newdecl
== olddecl
)
989 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
990 /* If the two DECLs are not even the same kind of thing, we're not
991 interested in their types. */
994 gcc_assert (DECL_P (newdecl
));
996 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
998 tree f1
= TREE_TYPE (newdecl
);
999 tree f2
= TREE_TYPE (olddecl
);
1000 tree p1
= TYPE_ARG_TYPES (f1
);
1001 tree p2
= TYPE_ARG_TYPES (f2
);
1004 /* Specializations of different templates are different functions
1005 even if they have the same type. */
1006 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
1007 ? DECL_TI_TEMPLATE (newdecl
)
1009 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
1010 ? DECL_TI_TEMPLATE (olddecl
)
1015 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1016 && ! (DECL_EXTERN_C_P (newdecl
)
1017 && DECL_EXTERN_C_P (olddecl
)))
1020 /* A new declaration doesn't match a built-in one unless it
1021 is also extern "C". */
1022 if (DECL_IS_BUILTIN (olddecl
)
1023 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1026 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1029 /* A declaration with deduced return type should use its pre-deduction
1030 type for declaration matching. */
1031 r2
= fndecl_declared_return_type (olddecl
);
1033 if (same_type_p (TREE_TYPE (f1
), r2
))
1035 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1036 && (DECL_BUILT_IN (olddecl
)
1037 #ifndef NO_IMPLICIT_EXTERN_C
1038 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1039 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1043 types_match
= self_promoting_args_p (p1
);
1044 if (p1
== void_list_node
)
1045 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1047 #ifndef NO_IMPLICIT_EXTERN_C
1048 else if (!prototype_p (f1
)
1049 && (DECL_EXTERN_C_P (olddecl
)
1050 && DECL_IN_SYSTEM_HEADER (olddecl
)
1051 && !DECL_CLASS_SCOPE_P (olddecl
))
1052 && (DECL_EXTERN_C_P (newdecl
)
1053 && DECL_IN_SYSTEM_HEADER (newdecl
)
1054 && !DECL_CLASS_SCOPE_P (newdecl
)))
1056 types_match
= self_promoting_args_p (p2
);
1057 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1063 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1064 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1065 || comp_type_attributes (TREE_TYPE (newdecl
),
1066 TREE_TYPE (olddecl
)) != 0);
1071 /* The decls dont match if they correspond to two different versions
1072 of the same function. Disallow extern "C" functions to be
1073 versions for now. */
1075 && !DECL_EXTERN_C_P (newdecl
)
1076 && !DECL_EXTERN_C_P (olddecl
)
1077 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1079 /* Mark functions as versions if necessary. Modify the mangled decl
1080 name if necessary. */
1081 if (DECL_FUNCTION_VERSIONED (newdecl
)
1082 && DECL_FUNCTION_VERSIONED (olddecl
))
1084 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1086 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1087 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1088 mangle_decl (newdecl
);
1090 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1092 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1093 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1094 mangle_decl (olddecl
);
1096 cgraph_node::record_function_versions (olddecl
, newdecl
);
1100 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1102 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1103 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1106 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1107 DECL_TEMPLATE_PARMS (olddecl
)))
1110 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1111 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1112 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1114 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1115 DECL_TEMPLATE_RESULT (newdecl
));
1119 /* Need to check scope for variable declaration (VAR_DECL).
1120 For typedef (TYPE_DECL), scope is ignored. */
1122 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1124 Two declarations for an object with C language linkage
1125 with the same name (ignoring the namespace that qualify
1126 it) that appear in different namespace scopes refer to
1128 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1131 if (TREE_TYPE (newdecl
) == error_mark_node
)
1132 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1133 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1134 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1135 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1138 types_match
= comptypes (TREE_TYPE (newdecl
),
1139 TREE_TYPE (olddecl
),
1140 COMPARE_REDECLARATION
);
1146 /* If NEWDECL is `static' and an `extern' was seen previously,
1147 warn about it. OLDDECL is the previous declaration.
1149 Note that this does not apply to the C++ case of declaring
1150 a variable `extern const' and then later `const'.
1152 Don't complain about built-in functions, since they are beyond
1153 the user's control. */
1156 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1158 if (TREE_CODE (newdecl
) == TYPE_DECL
1159 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1160 || TREE_CODE (newdecl
) == CONST_DECL
1161 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1164 /* Don't get confused by static member functions; that's a different
1166 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1167 && DECL_STATIC_FUNCTION_P (newdecl
))
1170 /* If the old declaration was `static', or the new one isn't, then
1171 everything is OK. */
1172 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1175 /* It's OK to declare a builtin function as `static'. */
1176 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1177 && DECL_ARTIFICIAL (olddecl
))
1180 if (permerror (DECL_SOURCE_LOCATION (newdecl
),
1181 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1182 inform (input_location
, "previous declaration of %q+D", olddecl
);
1185 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1186 function templates. If their exception specifications do not
1187 match, issue a diagnostic. */
1190 check_redeclaration_exception_specification (tree new_decl
,
1193 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1194 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1196 /* Two default specs are equivalent, don't force evaluation. */
1197 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1198 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1201 maybe_instantiate_noexcept (new_decl
);
1202 maybe_instantiate_noexcept (old_decl
);
1203 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1204 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1208 If any declaration of a function has an exception-specification,
1209 all declarations, including the definition and an explicit
1210 specialization, of that function shall have an
1211 exception-specification with the same set of type-ids. */
1212 if (! DECL_IS_BUILTIN (old_decl
)
1214 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1217 = "declaration of %q+F has a different exception specifier";
1218 bool complained
= true;
1219 if (! DECL_IN_SYSTEM_HEADER (old_decl
))
1220 error (msg
, new_decl
);
1222 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1224 inform (0, "from previous declaration %q+F", old_decl
);
1228 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1229 Otherwise issue diagnostics. */
1232 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1234 old_decl
= STRIP_TEMPLATE (old_decl
);
1235 new_decl
= STRIP_TEMPLATE (new_decl
);
1236 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1237 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1239 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1240 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1242 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1244 if (DECL_BUILT_IN (old_decl
))
1246 /* Hide a built-in declaration. */
1247 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1248 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1251 /* 7.1.5 [dcl.constexpr]
1252 Note: An explicit specialization can differ from the template
1253 declaration with respect to the constexpr specifier. */
1254 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1255 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1258 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1259 error ("from previous declaration %q+D", old_decl
);
1265 /* DECL is a redeclaration of a function or function template. If
1266 it does have default arguments issue a diagnostic. Note: this
1267 function is used to enforce the requirements in C++11 8.3.6 about
1268 no default arguments in redeclarations. */
1271 check_redeclaration_no_default_args (tree decl
)
1273 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1275 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1276 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1277 if (TREE_PURPOSE (t
))
1279 permerror (input_location
,
1280 "redeclaration of %q+#D may not have default "
1286 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1287 && lookup_attribute ("gnu_inline", \
1288 DECL_ATTRIBUTES (fn)))
1290 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1291 If the redeclaration is invalid, a diagnostic is issued, and the
1292 error_mark_node is returned. Otherwise, OLDDECL is returned.
1294 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1297 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1300 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1302 unsigned olddecl_uid
= DECL_UID (olddecl
);
1303 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1304 int new_defines_function
= 0;
1305 tree new_template_info
;
1307 if (newdecl
== olddecl
)
1310 types_match
= decls_match (newdecl
, olddecl
);
1312 /* If either the type of the new decl or the type of the old decl is an
1313 error_mark_node, then that implies that we have already issued an
1314 error (earlier) for some bogus type specification, and in that case,
1315 it is rather pointless to harass the user with yet more error message
1316 about the same declaration, so just pretend the types match here. */
1317 if (TREE_TYPE (newdecl
) == error_mark_node
1318 || TREE_TYPE (olddecl
) == error_mark_node
)
1319 return error_mark_node
;
1321 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1322 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1324 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1325 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1326 && check_raw_literal_operator (olddecl
))
1327 error ("literal operator template %q+D conflicts with"
1328 " raw literal operator %qD", newdecl
, olddecl
);
1329 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1330 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1331 && check_raw_literal_operator (newdecl
))
1332 error ("raw literal operator %q+D conflicts with"
1333 " literal operator template %qD", newdecl
, olddecl
);
1336 if (DECL_P (olddecl
)
1337 && TREE_CODE (newdecl
) == FUNCTION_DECL
1338 && TREE_CODE (olddecl
) == FUNCTION_DECL
1339 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1341 if (DECL_DECLARED_INLINE_P (newdecl
)
1342 && DECL_UNINLINABLE (newdecl
)
1343 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1344 /* Already warned elsewhere. */;
1345 else if (DECL_DECLARED_INLINE_P (olddecl
)
1346 && DECL_UNINLINABLE (olddecl
)
1347 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1348 /* Already warned. */;
1349 else if (DECL_DECLARED_INLINE_P (newdecl
)
1350 && DECL_UNINLINABLE (olddecl
)
1351 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1353 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1355 inform (DECL_SOURCE_LOCATION (olddecl
),
1356 "previous declaration of %qD with attribute noinline",
1359 else if (DECL_DECLARED_INLINE_P (olddecl
)
1360 && DECL_UNINLINABLE (newdecl
)
1361 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1363 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1364 "attribute noinline", newdecl
))
1365 inform (DECL_SOURCE_LOCATION (olddecl
),
1366 "previous declaration of %qD was inline",
1371 /* Check for redeclaration and other discrepancies. */
1372 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1373 && DECL_ARTIFICIAL (olddecl
))
1375 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1376 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1378 /* Avoid warnings redeclaring built-ins which have not been
1379 explicitly declared. */
1380 if (DECL_ANTICIPATED (olddecl
))
1383 /* If you declare a built-in or predefined function name as static,
1384 the old definition is overridden, but optionally warn this was a
1385 bad choice of name. */
1386 if (! TREE_PUBLIC (newdecl
))
1388 warning (OPT_Wshadow
,
1389 DECL_BUILT_IN (olddecl
)
1390 ? G_("shadowing built-in function %q#D")
1391 : G_("shadowing library function %q#D"), olddecl
);
1392 /* Discard the old built-in function. */
1395 /* If the built-in is not ansi, then programs can override
1396 it even globally without an error. */
1397 else if (! DECL_BUILT_IN (olddecl
))
1398 warning (0, "library function %q#D redeclared as non-function %q+#D",
1401 error ("declaration of %q+#D conflicts with built-in "
1402 "declaration %q#D", newdecl
, olddecl
);
1405 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1407 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1408 error_at (DECL_SOURCE_LOCATION (newdecl
),
1409 "redeclaration of %<pragma omp declare reduction%>");
1410 inform (DECL_SOURCE_LOCATION (olddecl
),
1411 "previous %<pragma omp declare reduction%> declaration");
1412 return error_mark_node
;
1414 else if (!types_match
)
1416 /* Avoid warnings redeclaring built-ins which have not been
1417 explicitly declared. */
1418 if (DECL_ANTICIPATED (olddecl
))
1420 /* Deal with fileptr_type_node. FILE type is not known
1421 at the time we create the builtins. */
1424 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1425 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1427 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1430 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1432 tree t
= TREE_VALUE (t1
);
1435 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1436 == get_identifier ("FILE")
1437 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1439 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1441 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1442 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1443 types_match
= decls_match (newdecl
, olddecl
);
1445 return duplicate_decls (newdecl
, olddecl
,
1447 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1450 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1453 else if ((DECL_EXTERN_C_P (newdecl
)
1454 && DECL_EXTERN_C_P (olddecl
))
1455 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1456 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1458 /* A near match; override the builtin. */
1460 if (TREE_PUBLIC (newdecl
))
1461 warning (0, "new declaration %q+#D ambiguates built-in "
1462 "declaration %q#D", newdecl
, olddecl
);
1464 warning (OPT_Wshadow
,
1465 DECL_BUILT_IN (olddecl
)
1466 ? G_("shadowing built-in function %q#D")
1467 : G_("shadowing library function %q#D"), olddecl
);
1470 /* Discard the old built-in function. */
1473 /* Replace the old RTL to avoid problems with inlining. */
1474 COPY_DECL_RTL (newdecl
, olddecl
);
1476 /* Even if the types match, prefer the new declarations type for
1477 built-ins which have not been explicitly declared, for
1478 exception lists, etc... */
1479 else if (DECL_IS_BUILTIN (olddecl
))
1481 tree type
= TREE_TYPE (newdecl
);
1482 tree attribs
= (*targetm
.merge_type_attributes
)
1483 (TREE_TYPE (olddecl
), type
);
1485 type
= cp_build_type_attribute_variant (type
, attribs
);
1486 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1489 /* If a function is explicitly declared "throw ()", propagate that to
1490 the corresponding builtin. */
1491 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1492 && DECL_ANTICIPATED (olddecl
)
1493 && TREE_NOTHROW (newdecl
)
1494 && !TREE_NOTHROW (olddecl
))
1496 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1497 tree tmpdecl
= builtin_decl_explicit (fncode
);
1498 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1499 TREE_NOTHROW (tmpdecl
) = 1;
1502 /* Whether or not the builtin can throw exceptions has no
1503 bearing on this declarator. */
1504 TREE_NOTHROW (olddecl
) = 0;
1506 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1508 /* If a builtin function is redeclared as `static', merge
1509 the declarations, but make the original one static. */
1510 DECL_THIS_STATIC (olddecl
) = 1;
1511 TREE_PUBLIC (olddecl
) = 0;
1513 /* Make the old declaration consistent with the new one so
1514 that all remnants of the builtin-ness of this function
1515 will be banished. */
1516 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1517 COPY_DECL_RTL (newdecl
, olddecl
);
1520 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1522 /* C++ Standard, 3.3, clause 4:
1523 "[Note: a namespace name or a class template name must be unique
1524 in its declarative region (7.3.2, clause 14). ]" */
1525 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1526 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1527 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1528 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1529 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1530 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1532 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1533 && TREE_CODE (newdecl
) != TYPE_DECL
)
1534 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1535 && TREE_CODE (olddecl
) != TYPE_DECL
))
1537 /* We do nothing special here, because C++ does such nasty
1538 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1539 get shadowed, and know that if we need to find a TYPE_DECL
1540 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1541 slot of the identifier. */
1545 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1546 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1547 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1548 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1552 error ("%q#D redeclared as different kind of symbol", newdecl
);
1553 if (TREE_CODE (olddecl
) == TREE_LIST
)
1554 olddecl
= TREE_VALUE (olddecl
);
1555 inform (DECL_SOURCE_LOCATION (olddecl
),
1556 "previous declaration %q#D", olddecl
);
1558 return error_mark_node
;
1560 else if (!types_match
)
1562 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1563 /* These are certainly not duplicate declarations; they're
1564 from different scopes. */
1567 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1569 /* The name of a class template may not be declared to refer to
1570 any other template, class, function, object, namespace, value,
1571 or type in the same scope. */
1572 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1573 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1575 error ("conflicting declaration of template %q+#D", newdecl
);
1576 inform (DECL_SOURCE_LOCATION (olddecl
),
1577 "previous declaration %q#D", olddecl
);
1578 return error_mark_node
;
1580 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1581 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1582 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1583 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1584 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1585 DECL_TEMPLATE_PARMS (olddecl
))
1586 /* Template functions can be disambiguated by
1588 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1589 TREE_TYPE (TREE_TYPE (olddecl
))))
1591 error ("ambiguating new declaration %q+#D", newdecl
);
1592 inform (DECL_SOURCE_LOCATION (olddecl
),
1593 "old declaration %q#D", olddecl
);
1597 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1599 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1601 error ("conflicting declaration of C function %q+#D",
1603 inform (DECL_SOURCE_LOCATION (olddecl
),
1604 "previous declaration %q#D", olddecl
);
1607 /* For function versions, params and types match, but they
1608 are not ambiguous. */
1609 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1610 && !DECL_FUNCTION_VERSIONED (olddecl
))
1611 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1612 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1614 error ("ambiguating new declaration of %q+#D", newdecl
);
1615 inform (DECL_SOURCE_LOCATION (olddecl
),
1616 "old declaration %q#D", olddecl
);
1617 return error_mark_node
;
1624 error ("conflicting declaration %q+#D", newdecl
);
1625 inform (DECL_SOURCE_LOCATION (olddecl
),
1626 "previous declaration as %q#D", olddecl
);
1627 return error_mark_node
;
1630 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1631 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1632 && (!DECL_TEMPLATE_INFO (newdecl
)
1633 || (DECL_TI_TEMPLATE (newdecl
)
1634 != DECL_TI_TEMPLATE (olddecl
))))
1635 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1636 && (!DECL_TEMPLATE_INFO (olddecl
)
1637 || (DECL_TI_TEMPLATE (olddecl
)
1638 != DECL_TI_TEMPLATE (newdecl
))))))
1639 /* It's OK to have a template specialization and a non-template
1640 with the same type, or to have specializations of two
1641 different templates with the same type. Note that if one is a
1642 specialization, and the other is an instantiation of the same
1643 template, that we do not exit at this point. That situation
1644 can occur if we instantiate a template class, and then
1645 specialize one of its methods. This situation is valid, but
1646 the declarations must be merged in the usual way. */
1648 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1649 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1650 && !DECL_USE_TEMPLATE (newdecl
))
1651 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1652 && !DECL_USE_TEMPLATE (olddecl
))))
1653 /* One of the declarations is a template instantiation, and the
1654 other is not a template at all. That's OK. */
1656 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1658 /* In [namespace.alias] we have:
1660 In a declarative region, a namespace-alias-definition can be
1661 used to redefine a namespace-alias declared in that declarative
1662 region to refer only to the namespace to which it already
1665 Therefore, if we encounter a second alias directive for the same
1666 alias, we can just ignore the second directive. */
1667 if (DECL_NAMESPACE_ALIAS (newdecl
)
1668 && (DECL_NAMESPACE_ALIAS (newdecl
)
1669 == DECL_NAMESPACE_ALIAS (olddecl
)))
1671 /* [namespace.alias]
1673 A namespace-name or namespace-alias shall not be declared as
1674 the name of any other entity in the same declarative region.
1675 A namespace-name defined at global scope shall not be
1676 declared as the name of any other entity in any global scope
1678 error ("conflicting declaration of namespace %q+D", newdecl
);
1679 inform (DECL_SOURCE_LOCATION (olddecl
),
1680 "previous declaration of namespace %qD here", olddecl
);
1681 return error_mark_node
;
1685 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1688 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1689 if (DECL_NAME (olddecl
) != NULL_TREE
)
1690 inform (input_location
,
1691 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1692 ? G_("%q+#D previously defined here")
1693 : G_("%q+#D previously declared here"), olddecl
);
1694 return error_mark_node
;
1696 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1697 && DECL_INITIAL (olddecl
) != NULL_TREE
1698 && !prototype_p (TREE_TYPE (olddecl
))
1699 && prototype_p (TREE_TYPE (newdecl
)))
1701 /* Prototype decl follows defn w/o prototype. */
1702 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1703 "prototype specified for %q+#D", newdecl
))
1704 inform (DECL_SOURCE_LOCATION (olddecl
),
1705 "previous non-prototype definition here");
1707 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1708 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1711 If two declarations of the same function or object
1712 specify different linkage-specifications ..., the program
1713 is ill-formed.... Except for functions with C++ linkage,
1714 a function declaration without a linkage specification
1715 shall not precede the first linkage specification for
1716 that function. A function can be declared without a
1717 linkage specification after an explicit linkage
1718 specification has been seen; the linkage explicitly
1719 specified in the earlier declaration is not affected by
1720 such a function declaration.
1722 DR 563 raises the question why the restrictions on
1723 functions should not also apply to objects. Older
1724 versions of G++ silently ignore the linkage-specification
1732 which is clearly wrong. Therefore, we now treat objects
1734 if (current_lang_depth () == 0)
1736 /* There is no explicit linkage-specification, so we use
1737 the linkage from the previous declaration. */
1738 if (!DECL_LANG_SPECIFIC (newdecl
))
1739 retrofit_lang_decl (newdecl
);
1740 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1744 error ("conflicting declaration of %q+#D with %qL linkage",
1745 newdecl
, DECL_LANGUAGE (newdecl
));
1746 inform (DECL_SOURCE_LOCATION (olddecl
),
1747 "previous declaration with %qL linkage",
1748 DECL_LANGUAGE (olddecl
));
1752 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1754 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1756 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1757 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1758 && (/* grokfndecl passes member function templates too
1759 as FUNCTION_DECLs. */
1760 DECL_TEMPLATE_INFO (olddecl
)
1762 Default arguments for a member function of a class
1763 template shall be specified on the initial declaration
1764 of the member function within the class template. */
1765 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1766 check_redeclaration_no_default_args (newdecl
);
1769 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1770 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1773 for (; t1
&& t1
!= void_list_node
;
1774 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1775 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1777 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1780 if (permerror (input_location
,
1781 "default argument given for parameter "
1782 "%d of %q#D", i
, newdecl
))
1783 inform (DECL_SOURCE_LOCATION (olddecl
),
1784 "previous specification in %q#D here",
1789 error ("default argument given for parameter %d "
1790 "of %q#D", i
, newdecl
);
1791 inform (DECL_SOURCE_LOCATION (olddecl
),
1792 "previous specification in %q#D here",
1800 /* Do not merge an implicit typedef with an explicit one. In:
1804 typedef class A A __attribute__ ((foo));
1806 the attribute should apply only to the typedef. */
1807 if (TREE_CODE (olddecl
) == TYPE_DECL
1808 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1809 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1812 /* If new decl is `static' and an `extern' was seen previously,
1814 warn_extern_redeclared_static (newdecl
, olddecl
);
1816 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1817 return error_mark_node
;
1819 /* We have committed to returning 1 at this point. */
1820 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1822 /* Now that functions must hold information normally held
1823 by field decls, there is extra work to do so that
1824 declaration information does not get destroyed during
1826 if (DECL_VINDEX (olddecl
))
1827 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1828 if (DECL_CONTEXT (olddecl
))
1829 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1830 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1831 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1832 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1833 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1834 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1835 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1836 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1837 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1838 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1839 SET_OVERLOADED_OPERATOR_CODE
1840 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1841 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1843 /* Optionally warn about more than one declaration for the same
1844 name, but don't warn about a function declaration followed by a
1846 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1847 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1848 /* Don't warn about extern decl followed by definition. */
1849 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1850 /* Don't warn about friends, let add_friend take care of it. */
1851 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1852 /* Don't warn about declaration followed by specialization. */
1853 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1854 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1856 if (warning (OPT_Wredundant_decls
,
1857 "redundant redeclaration of %q+D in same scope",
1859 inform (DECL_SOURCE_LOCATION (olddecl
),
1860 "previous declaration of %qD", olddecl
);
1863 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1864 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1866 if (DECL_DELETED_FN (newdecl
))
1868 error ("deleted definition of %q+D", newdecl
);
1869 inform (DECL_SOURCE_LOCATION (olddecl
),
1870 "previous declaration of %qD", olddecl
);
1872 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1876 /* Deal with C++: must preserve virtual function table size. */
1877 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1879 tree newtype
= TREE_TYPE (newdecl
);
1880 tree oldtype
= TREE_TYPE (olddecl
);
1882 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1883 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1884 CLASSTYPE_FRIEND_CLASSES (newtype
)
1885 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1887 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1890 /* Copy all the DECL_... slots specified in the new decl
1891 except for any that we copy here from the old type. */
1892 DECL_ATTRIBUTES (newdecl
)
1893 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1895 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1897 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1898 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1899 && DECL_HIDDEN_FRIEND_P (olddecl
)
1900 && newdecl_is_friend
);
1903 DECL_ANTICIPATED (olddecl
) = 0;
1904 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1908 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1912 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1913 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1914 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1915 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1916 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1917 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1919 DECL_ATTRIBUTES (old_result
)
1920 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1922 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1924 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1925 declarations of a function template. */
1926 if (DECL_SOURCE_LOCATION (newdecl
)
1927 != DECL_SOURCE_LOCATION (olddecl
))
1928 check_redeclaration_no_default_args (newdecl
);
1930 check_default_args (newdecl
);
1932 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1933 && DECL_INITIAL (new_result
))
1935 if (DECL_INITIAL (old_result
))
1936 DECL_UNINLINABLE (old_result
) = 1;
1938 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1939 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1940 DECL_NOT_REALLY_EXTERN (old_result
)
1941 = DECL_NOT_REALLY_EXTERN (new_result
);
1942 DECL_INTERFACE_KNOWN (old_result
)
1943 = DECL_INTERFACE_KNOWN (new_result
);
1944 DECL_DECLARED_INLINE_P (old_result
)
1945 = DECL_DECLARED_INLINE_P (new_result
);
1946 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1947 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1952 DECL_DECLARED_INLINE_P (old_result
)
1953 |= DECL_DECLARED_INLINE_P (new_result
);
1954 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1955 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1956 check_redeclaration_exception_specification (newdecl
, olddecl
);
1960 /* If the new declaration is a definition, update the file and
1961 line information on the declaration, and also make
1962 the old declaration the same definition. */
1963 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1965 DECL_SOURCE_LOCATION (olddecl
)
1966 = DECL_SOURCE_LOCATION (old_result
)
1967 = DECL_SOURCE_LOCATION (newdecl
);
1968 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1969 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1972 DECL_ARGUMENTS (old_result
)
1973 = DECL_ARGUMENTS (new_result
);
1974 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1975 parm
= DECL_CHAIN (parm
))
1976 DECL_CONTEXT (parm
) = old_result
;
1985 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1986 check_redeclaration_exception_specification (newdecl
, olddecl
);
1988 /* Automatically handles default parameters. */
1989 tree oldtype
= TREE_TYPE (olddecl
);
1992 /* For typedefs use the old type, as the new type's DECL_NAME points
1993 at newdecl, which will be ggc_freed. */
1994 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1997 /* Merge the data types specified in the two decls. */
1998 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
2000 if (VAR_P (newdecl
))
2002 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
2003 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
2004 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
2005 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
2006 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
2007 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
2009 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2010 if (DECL_LANG_SPECIFIC (olddecl
)
2011 && CP_DECL_THREADPRIVATE_P (olddecl
))
2013 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2014 if (!DECL_LANG_SPECIFIC (newdecl
))
2015 retrofit_lang_decl (newdecl
);
2017 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2021 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2023 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2024 check_default_args (newdecl
);
2026 /* Lay the type out, unless already done. */
2027 if (! same_type_p (newtype
, oldtype
)
2028 && TREE_TYPE (newdecl
) != error_mark_node
2029 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2030 layout_type (TREE_TYPE (newdecl
));
2032 if ((VAR_P (newdecl
)
2033 || TREE_CODE (newdecl
) == PARM_DECL
2034 || TREE_CODE (newdecl
) == RESULT_DECL
2035 || TREE_CODE (newdecl
) == FIELD_DECL
2036 || TREE_CODE (newdecl
) == TYPE_DECL
)
2037 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2038 layout_decl (newdecl
, 0);
2040 /* Merge the type qualifiers. */
2041 if (TREE_READONLY (newdecl
))
2042 TREE_READONLY (olddecl
) = 1;
2043 if (TREE_THIS_VOLATILE (newdecl
))
2044 TREE_THIS_VOLATILE (olddecl
) = 1;
2045 if (TREE_NOTHROW (newdecl
))
2046 TREE_NOTHROW (olddecl
) = 1;
2048 /* Merge deprecatedness. */
2049 if (TREE_DEPRECATED (newdecl
))
2050 TREE_DEPRECATED (olddecl
) = 1;
2052 /* Preserve function specific target and optimization options */
2053 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2055 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2056 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2057 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2058 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2060 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2061 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2062 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2063 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2066 /* Merge the initialization information. */
2067 if (DECL_INITIAL (newdecl
) == NULL_TREE
2068 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2070 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2071 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2072 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2074 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2075 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2079 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2081 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2082 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2083 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2084 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2085 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2086 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2087 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2088 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2089 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2090 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2091 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2092 /* Keep the old RTL. */
2093 COPY_DECL_RTL (olddecl
, newdecl
);
2095 else if (VAR_P (newdecl
)
2096 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2098 /* Keep the old RTL. We cannot keep the old RTL if the old
2099 declaration was for an incomplete object and the new
2100 declaration is not since many attributes of the RTL will
2102 COPY_DECL_RTL (olddecl
, newdecl
);
2105 /* If cannot merge, then use the new type and qualifiers,
2106 and don't preserve the old rtl. */
2109 /* Clean out any memory we had of the old declaration. */
2110 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2112 TREE_VALUE (oldstatic
) = error_mark_node
;
2114 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2115 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2116 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2117 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2120 /* Merge the storage class information. */
2121 merge_weak (newdecl
, olddecl
);
2123 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2124 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2125 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2126 if (! DECL_EXTERNAL (olddecl
))
2127 DECL_EXTERNAL (newdecl
) = 0;
2129 new_template_info
= NULL_TREE
;
2130 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2132 bool new_redefines_gnu_inline
= false;
2134 if (new_defines_function
2135 && ((DECL_INTERFACE_KNOWN (olddecl
)
2136 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2137 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2138 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2139 == FUNCTION_DECL
))))
2143 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2144 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2146 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2149 if (!new_redefines_gnu_inline
)
2151 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2152 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2153 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2155 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2156 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2157 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2159 /* If the OLDDECL is an instantiation and/or specialization,
2160 then the NEWDECL must be too. But, it may not yet be marked
2161 as such if the caller has created NEWDECL, but has not yet
2162 figured out that it is a redeclaration. */
2163 if (!DECL_USE_TEMPLATE (newdecl
))
2164 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2166 /* Don't really know how much of the language-specific
2167 values we should copy from old to new. */
2168 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2169 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2170 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2171 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2173 if (LANG_DECL_HAS_MIN (newdecl
))
2175 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2176 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2177 if (DECL_TEMPLATE_INFO (newdecl
))
2179 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2180 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2181 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2182 /* Remember the presence of explicit specialization args. */
2183 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2184 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2186 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2188 /* Only functions have these fields. */
2189 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2191 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2192 DECL_BEFRIENDING_CLASSES (newdecl
)
2193 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2194 DECL_BEFRIENDING_CLASSES (olddecl
));
2195 /* DECL_THUNKS is only valid for virtual functions,
2196 otherwise it is a DECL_FRIEND_CONTEXT. */
2197 if (DECL_VIRTUAL_P (newdecl
))
2198 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2200 /* Only variables have this field. */
2201 else if (VAR_P (newdecl
)
2202 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2203 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2206 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2210 /* Merge parameter attributes. */
2211 tree oldarg
, newarg
;
2212 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2213 newarg
= DECL_ARGUMENTS(newdecl
);
2215 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2216 DECL_ATTRIBUTES (newarg
)
2217 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2218 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2221 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2222 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2224 /* If newdecl is not a specialization, then it is not a
2225 template-related function at all. And that means that we
2226 should have exited above, returning 0. */
2227 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2229 if (DECL_ODR_USED (olddecl
))
2230 /* From [temp.expl.spec]:
2232 If a template, a member template or the member of a class
2233 template is explicitly specialized then that
2234 specialization shall be declared before the first use of
2235 that specialization that would cause an implicit
2236 instantiation to take place, in every translation unit in
2237 which such a use occurs. */
2238 error ("explicit specialization of %qD after first use",
2241 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2242 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2243 && DECL_DECLARED_INLINE_P (newdecl
));
2245 /* Don't propagate visibility from the template to the
2246 specialization here. We'll do that in determine_visibility if
2248 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2250 /* [temp.expl.spec/14] We don't inline explicit specialization
2251 just because the primary template says so. */
2253 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2254 the always_inline attribute. */
2255 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2256 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2258 if (DECL_DECLARED_INLINE_P (newdecl
))
2259 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2261 DECL_ATTRIBUTES (newdecl
)
2262 = remove_attribute ("always_inline",
2263 DECL_ATTRIBUTES (newdecl
));
2266 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2268 /* Never inline re-defined extern inline functions.
2269 FIXME: this could be better handled by keeping both
2270 function as separate declarations. */
2271 DECL_UNINLINABLE (newdecl
) = 1;
2275 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2276 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2278 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2280 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2281 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2283 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2284 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2285 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2286 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2289 /* Preserve abstractness on cloned [cd]tors. */
2290 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2292 /* Update newdecl's parms to point at olddecl. */
2293 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2294 parm
= DECL_CHAIN (parm
))
2295 DECL_CONTEXT (parm
) = olddecl
;
2299 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2300 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2301 COPY_DECL_RTL (newdecl
, olddecl
);
2303 if (! types_match
|| new_defines_function
)
2305 /* These need to be copied so that the names are available.
2306 Note that if the types do match, we'll preserve inline
2307 info and other bits, but if not, we won't. */
2308 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2309 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2311 /* If redeclaring a builtin function, it stays built in
2312 if newdecl is a gnu_inline definition, or if newdecl is just
2314 if (DECL_BUILT_IN (olddecl
)
2315 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2317 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2318 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2319 /* If we're keeping the built-in definition, keep the rtl,
2320 regardless of declaration matches. */
2321 COPY_DECL_RTL (olddecl
, newdecl
);
2322 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2324 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2327 /* If a compatible prototype of these builtin functions
2328 is seen, assume the runtime implements it with the
2329 expected semantics. */
2330 case BUILT_IN_STPCPY
:
2331 if (builtin_decl_explicit_p (fncode
))
2332 set_builtin_decl_implicit_p (fncode
, true);
2335 if (builtin_decl_explicit_p (fncode
))
2336 set_builtin_decl_declared_p (fncode
, true);
2341 if (new_defines_function
)
2342 /* If defining a function declared with other language
2343 linkage, use the previously declared language linkage. */
2344 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2345 else if (types_match
)
2347 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2348 /* Don't clear out the arguments if we're just redeclaring a
2350 if (DECL_ARGUMENTS (olddecl
))
2351 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2354 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2355 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2357 /* Now preserve various other info from the definition. */
2358 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2359 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2360 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2361 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2363 /* Warn about conflicting visibility specifications. */
2364 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2365 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2366 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2368 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2369 "%qD: visibility attribute ignored because it "
2370 "conflicts with previous declaration", newdecl
))
2371 inform (DECL_SOURCE_LOCATION (olddecl
),
2372 "previous declaration of %qD", olddecl
);
2374 /* Choose the declaration which specified visibility. */
2375 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2377 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2378 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2380 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2381 so keep this behavior. */
2382 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2384 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2385 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2387 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2388 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2390 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2391 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2393 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2394 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2395 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2397 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2398 with that from NEWDECL below. */
2399 if (DECL_LANG_SPECIFIC (olddecl
))
2401 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2402 != DECL_LANG_SPECIFIC (newdecl
));
2403 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2406 /* Merge the USED information. */
2407 if (TREE_USED (olddecl
))
2408 TREE_USED (newdecl
) = 1;
2409 else if (TREE_USED (newdecl
))
2410 TREE_USED (olddecl
) = 1;
2411 if (VAR_P (newdecl
))
2413 if (DECL_READ_P (olddecl
))
2414 DECL_READ_P (newdecl
) = 1;
2415 else if (DECL_READ_P (newdecl
))
2416 DECL_READ_P (olddecl
) = 1;
2418 if (DECL_PRESERVE_P (olddecl
))
2419 DECL_PRESERVE_P (newdecl
) = 1;
2420 else if (DECL_PRESERVE_P (newdecl
))
2421 DECL_PRESERVE_P (olddecl
) = 1;
2423 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2424 to olddecl and deleted. */
2425 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2426 && DECL_FUNCTION_VERSIONED (olddecl
))
2428 /* Set the flag for newdecl so that it gets copied to olddecl. */
2429 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2430 /* newdecl will be purged after copying to olddecl and is no longer
2432 cgraph_node::delete_function_version (newdecl
);
2435 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2438 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2440 function_size
= sizeof (struct tree_decl_common
);
2442 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2443 (char *) newdecl
+ sizeof (struct tree_common
),
2444 function_size
- sizeof (struct tree_common
));
2446 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2447 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2448 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2450 /* Preserve symtab node mapping. */
2451 olddecl
->decl_with_vis
.symtab_node
= snode
;
2453 if (new_template_info
)
2454 /* If newdecl is a template instantiation, it is possible that
2455 the following sequence of events has occurred:
2457 o A friend function was declared in a class template. The
2458 class template was instantiated.
2460 o The instantiation of the friend declaration was
2461 recorded on the instantiation list, and is newdecl.
2463 o Later, however, instantiate_class_template called pushdecl
2464 on the newdecl to perform name injection. But, pushdecl in
2465 turn called duplicate_decls when it discovered that another
2466 declaration of a global function with the same name already
2469 o Here, in duplicate_decls, we decided to clobber newdecl.
2471 If we're going to do that, we'd better make sure that
2472 olddecl, and not newdecl, is on the list of
2473 instantiations so that if we try to do the instantiation
2474 again we won't get the clobbered declaration. */
2475 reregister_specialization (newdecl
,
2481 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2483 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2484 (char *) newdecl
+ sizeof (struct tree_common
),
2485 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2486 switch (TREE_CODE (newdecl
))
2496 struct symtab_node
*snode
= NULL
;
2498 if (TREE_CODE (newdecl
) == VAR_DECL
2499 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2500 snode
= symtab_node::get (olddecl
);
2501 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2502 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2503 size
- sizeof (struct tree_decl_common
)
2504 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2505 if (TREE_CODE (newdecl
) == VAR_DECL
)
2506 olddecl
->decl_with_vis
.symtab_node
= snode
;
2510 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2511 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2512 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2513 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2518 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2519 || TREE_CODE (newdecl
) == VAR_DECL
)
2521 if (DECL_EXTERNAL (olddecl
)
2522 || TREE_PUBLIC (olddecl
)
2523 || TREE_STATIC (olddecl
))
2525 /* Merge the section attribute.
2526 We want to issue an error if the sections conflict but that must be
2527 done later in decl_attributes since we are called before attributes
2529 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2530 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2532 if (DECL_ONE_ONLY (newdecl
))
2534 struct symtab_node
*oldsym
, *newsym
;
2535 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2536 oldsym
= cgraph_node::get_create (olddecl
);
2538 oldsym
= varpool_node::get_create (olddecl
);
2539 newsym
= symtab_node::get (newdecl
);
2540 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2544 if (TREE_CODE (newdecl
) == VAR_DECL
2545 && DECL_THREAD_LOCAL_P (newdecl
))
2546 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2549 DECL_UID (olddecl
) = olddecl_uid
;
2551 DECL_FRIEND_P (olddecl
) = 1;
2554 DECL_ANTICIPATED (olddecl
) = 1;
2555 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2558 /* NEWDECL contains the merged attribute lists.
2559 Update OLDDECL to be the same. */
2560 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2562 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2563 so that encode_section_info has a chance to look at the new decl
2564 flags and attributes. */
2565 if (DECL_RTL_SET_P (olddecl
)
2566 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2568 && TREE_STATIC (olddecl
))))
2569 make_decl_rtl (olddecl
);
2571 /* The NEWDECL will no longer be needed. Because every out-of-class
2572 declaration of a member results in a call to duplicate_decls,
2573 freeing these nodes represents in a significant savings.
2575 Before releasing the node, be sore to remove function from symbol
2576 table that might have been inserted there to record comdat group.
2577 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2578 structure is shared in between newdecl and oldecl. */
2579 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2580 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2581 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2582 || TREE_CODE (newdecl
) == VAR_DECL
)
2584 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2593 /* Return zero if the declaration NEWDECL is valid
2594 when the declaration OLDDECL (assumed to be for the same name)
2595 has already been seen.
2596 Otherwise return an error message format string with a %s
2597 where the identifier should go. */
2600 redeclaration_error_message (tree newdecl
, tree olddecl
)
2602 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2604 /* Because C++ can put things into name space for free,
2605 constructs like "typedef struct foo { ... } foo"
2606 would look like an erroneous redeclaration. */
2607 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2610 return G_("redefinition of %q#D");
2612 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2614 /* If this is a pure function, its olddecl will actually be
2615 the original initialization to `0' (which we force to call
2616 abort()). Don't complain about redefinition in this case. */
2617 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2618 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2621 /* If both functions come from different namespaces, this is not
2622 a redeclaration - this is a conflict with a used function. */
2623 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2624 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2625 && ! decls_match (olddecl
, newdecl
))
2626 return G_("%qD conflicts with used function");
2628 /* We'll complain about linkage mismatches in
2629 warn_extern_redeclared_static. */
2631 /* Defining the same name twice is no good. */
2632 if (DECL_INITIAL (olddecl
) != NULL_TREE
2633 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2635 if (DECL_NAME (olddecl
) == NULL_TREE
)
2636 return G_("%q#D not declared in class");
2637 else if (!GNU_INLINE_P (olddecl
)
2638 || GNU_INLINE_P (newdecl
))
2639 return G_("redefinition of %q#D");
2642 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2644 bool olda
= GNU_INLINE_P (olddecl
);
2645 bool newa
= GNU_INLINE_P (newdecl
);
2650 return G_("%q+D redeclared inline with "
2651 "%<gnu_inline%> attribute");
2653 return G_("%q+D redeclared inline without "
2654 "%<gnu_inline%> attribute");
2658 check_abi_tag_redeclaration
2659 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2660 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2664 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2668 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2670 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2671 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2672 return G_("redefinition of %q#D");
2676 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2677 || (DECL_TEMPLATE_RESULT (newdecl
)
2678 == DECL_TEMPLATE_RESULT (olddecl
)))
2681 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2682 if (DECL_TEMPLATE_INFO (nt
))
2683 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2684 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2685 if (DECL_TEMPLATE_INFO (ot
))
2686 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2687 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2688 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2689 return G_("redefinition of %q#D");
2691 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2693 bool olda
= GNU_INLINE_P (ot
);
2694 bool newa
= GNU_INLINE_P (nt
);
2699 return G_("%q+D redeclared inline with "
2700 "%<gnu_inline%> attribute");
2702 return G_("%q+D redeclared inline without "
2703 "%<gnu_inline%> attribute");
2707 /* Core issue #226 (C++0x):
2709 If a friend function template declaration specifies a
2710 default template-argument, that declaration shall be a
2711 definition and shall be the only declaration of the
2712 function template in the translation unit. */
2713 if ((cxx_dialect
!= cxx98
)
2714 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2715 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2716 /*is_primary=*/true,
2717 /*is_partial=*/false,
2718 /*is_friend_decl=*/2))
2719 return G_("redeclaration of friend %q#D "
2720 "may not have default template arguments");
2724 else if (VAR_P (newdecl
)
2725 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2726 && (! DECL_LANG_SPECIFIC (olddecl
)
2727 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2728 || DECL_THREAD_LOCAL_P (newdecl
)))
2730 /* Only variables can be thread-local, and all declarations must
2731 agree on this property. */
2732 if (DECL_THREAD_LOCAL_P (newdecl
))
2733 return G_("thread-local declaration of %q#D follows "
2734 "non-thread-local declaration");
2736 return G_("non-thread-local declaration of %q#D follows "
2737 "thread-local declaration");
2739 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2741 /* The objects have been declared at namespace scope. If either
2742 is a member of an anonymous union, then this is an invalid
2743 redeclaration. For example:
2749 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2750 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2751 return G_("redeclaration of %q#D");
2752 /* If at least one declaration is a reference, there is no
2753 conflict. For example:
2759 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2761 /* Reject two definitions. */
2762 return G_("redefinition of %q#D");
2766 /* Objects declared with block scope: */
2767 /* Reject two definitions, and reject a definition
2768 together with an external reference. */
2769 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2770 return G_("redeclaration of %q#D");
2775 /* Hash and equality functions for the named_label table. */
2778 named_label_hasher::hash (named_label_entry
*ent
)
2780 return DECL_UID (ent
->label_decl
);
2784 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2786 return a
->label_decl
== b
->label_decl
;
2789 /* Create a new label, named ID. */
2792 make_label_decl (tree id
, int local_p
)
2794 struct named_label_entry
*ent
;
2797 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2799 DECL_CONTEXT (decl
) = current_function_decl
;
2800 DECL_MODE (decl
) = VOIDmode
;
2801 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2803 /* Say where one reference is to the label, for the sake of the
2804 error if it is not defined. */
2805 DECL_SOURCE_LOCATION (decl
) = input_location
;
2807 /* Record the fact that this identifier is bound to this label. */
2808 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2810 /* Create the label htab for the function on demand. */
2812 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2814 /* Record this label on the list of labels used in this function.
2815 We do this before calling make_label_decl so that we get the
2816 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2817 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2818 ent
->label_decl
= decl
;
2820 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2821 gcc_assert (*slot
== NULL
);
2827 /* Look for a label named ID in the current function. If one cannot
2828 be found, create one. (We keep track of used, but undefined,
2829 labels, and complain about them at the end of a function.) */
2832 lookup_label_1 (tree id
)
2836 /* You can't use labels at global scope. */
2837 if (current_function_decl
== NULL_TREE
)
2839 error ("label %qE referenced outside of any function", id
);
2843 /* See if we've already got this label. */
2844 decl
= IDENTIFIER_LABEL_VALUE (id
);
2845 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2848 decl
= make_label_decl (id
, /*local_p=*/0);
2852 /* Wrapper for lookup_label_1. */
2855 lookup_label (tree id
)
2858 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2859 ret
= lookup_label_1 (id
);
2860 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2864 /* Declare a local label named ID. */
2867 declare_local_label (tree id
)
2870 cp_label_binding bind
;
2872 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2873 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2874 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2876 decl
= make_label_decl (id
, /*local_p=*/1);
2878 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2883 /* Returns nonzero if it is ill-formed to jump past the declaration of
2884 DECL. Returns 2 if it's also a real problem. */
2887 decl_jump_unsafe (tree decl
)
2889 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2890 with automatic storage duration is not in scope to a point where it is
2891 in scope is ill-formed unless the variable has scalar type, class type
2892 with a trivial default constructor and a trivial destructor, a
2893 cv-qualified version of one of these types, or an array of one of the
2894 preceding types and is declared without an initializer (8.5). */
2895 tree type
= TREE_TYPE (decl
);
2897 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2898 || type
== error_mark_node
)
2901 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2902 || variably_modified_type_p (type
, NULL_TREE
))
2905 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2911 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2914 identify_goto (tree decl
, const location_t
*locus
)
2916 bool complained
= (decl
2917 ? permerror (input_location
, "jump to label %qD", decl
)
2918 : permerror (input_location
, "jump to case label"));
2919 if (complained
&& locus
)
2920 inform (*locus
, " from here");
2924 /* Check that a single previously seen jump to a newly defined label
2925 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2926 the jump context; NAMES are the names in scope in LEVEL at the jump
2927 context; LOCUS is the source position of the jump or 0. Returns
2928 true if all is well. */
2931 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2932 bool exited_omp
, const location_t
*locus
)
2934 cp_binding_level
*b
;
2935 bool identified
= false, complained
= false;
2936 bool saw_eh
= false, saw_omp
= false;
2940 complained
= identify_goto (decl
, locus
);
2942 inform (input_location
, " exits OpenMP structured block");
2943 identified
= saw_omp
= true;
2946 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2948 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2950 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2951 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2952 : TREE_CHAIN (new_decls
)))
2954 int problem
= decl_jump_unsafe (new_decls
);
2960 complained
= identify_goto (decl
, locus
);
2966 inform (input_location
,
2967 " crosses initialization of %q+#D", new_decls
);
2969 inform (input_location
, " enters scope of %q+#D which has "
2970 "non-trivial destructor", new_decls
);
2976 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2980 complained
= identify_goto (decl
, locus
);
2985 if (b
->kind
== sk_try
)
2986 inform (input_location
, " enters try block");
2988 inform (input_location
, " enters catch block");
2992 if (b
->kind
== sk_omp
&& !saw_omp
)
2996 complained
= identify_goto (decl
, locus
);
3000 inform (input_location
, " enters OpenMP structured block");
3009 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
3011 check_previous_goto_1 (decl
, use
->binding_level
,
3012 use
->names_in_scope
, use
->in_omp_scope
,
3013 &use
->o_goto_locus
);
3017 check_switch_goto (cp_binding_level
* level
)
3019 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3022 /* Check that a new jump to a label DECL is OK. Called by
3023 finish_goto_stmt. */
3026 check_goto (tree decl
)
3028 struct named_label_entry
*ent
, dummy
;
3029 bool saw_catch
= false, identified
= false, complained
= false;
3033 /* We can't know where a computed goto is jumping.
3034 So we assume that it's OK. */
3035 if (TREE_CODE (decl
) != LABEL_DECL
)
3038 /* We didn't record any information about this label when we created it,
3039 and there's not much point since it's trivial to analyze as a return. */
3040 if (decl
== cdtor_label
)
3043 dummy
.label_decl
= decl
;
3044 ent
= named_labels
->find (&dummy
);
3045 gcc_assert (ent
!= NULL
);
3047 /* If the label hasn't been defined yet, defer checking. */
3048 if (! DECL_INITIAL (decl
))
3050 struct named_label_use_entry
*new_use
;
3052 /* Don't bother creating another use if the last goto had the
3053 same data, and will therefore create the same set of errors. */
3055 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3058 new_use
= ggc_alloc
<named_label_use_entry
> ();
3059 new_use
->binding_level
= current_binding_level
;
3060 new_use
->names_in_scope
= current_binding_level
->names
;
3061 new_use
->o_goto_locus
= input_location
;
3062 new_use
->in_omp_scope
= false;
3064 new_use
->next
= ent
->uses
;
3065 ent
->uses
= new_use
;
3069 if (ent
->in_try_scope
|| ent
->in_catch_scope
3070 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3072 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3074 inform (input_location
, " from here");
3078 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3080 int u
= decl_jump_unsafe (bad
);
3082 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3084 /* Can't skip init of __exception_info. */
3086 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3089 else if (complained
)
3092 inform (input_location
, " skips initialization of %q+#D", bad
);
3094 inform (input_location
, " enters scope of %q+#D which has "
3095 "non-trivial destructor", bad
);
3101 if (ent
->in_try_scope
)
3102 inform (input_location
, " enters try block");
3103 else if (ent
->in_catch_scope
&& !saw_catch
)
3104 inform (input_location
, " enters catch block");
3107 if (ent
->in_omp_scope
)
3110 inform (input_location
, " enters OpenMP structured block");
3112 else if (flag_openmp
)
3114 cp_binding_level
*b
;
3115 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3117 if (b
== ent
->binding_level
)
3119 if (b
->kind
== sk_omp
)
3123 complained
= permerror (input_location
,
3124 "jump to label %q+D", decl
);
3126 inform (input_location
, " from here");
3130 inform (input_location
, " exits OpenMP structured block");
3137 /* Check that a return is ok wrt OpenMP structured blocks.
3138 Called by finish_return_stmt. Returns true if all is well. */
3141 check_omp_return (void)
3143 cp_binding_level
*b
;
3144 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3145 if (b
->kind
== sk_omp
)
3147 error ("invalid exit from OpenMP structured block");
3150 else if (b
->kind
== sk_function_parms
)
3155 /* Define a label, specifying the location in the source file.
3156 Return the LABEL_DECL node for the label. */
3159 define_label_1 (location_t location
, tree name
)
3161 struct named_label_entry
*ent
, dummy
;
3162 cp_binding_level
*p
;
3165 decl
= lookup_label (name
);
3167 dummy
.label_decl
= decl
;
3168 ent
= named_labels
->find (&dummy
);
3169 gcc_assert (ent
!= NULL
);
3171 /* After labels, make any new cleanups in the function go into their
3172 own new (temporary) binding contour. */
3173 for (p
= current_binding_level
;
3174 p
->kind
!= sk_function_parms
;
3176 p
->more_cleanups_ok
= 0;
3178 if (name
== get_identifier ("wchar_t"))
3179 permerror (input_location
, "label named wchar_t");
3181 if (DECL_INITIAL (decl
) != NULL_TREE
)
3183 error ("duplicate label %qD", decl
);
3184 return error_mark_node
;
3188 struct named_label_use_entry
*use
;
3190 /* Mark label as having been defined. */
3191 DECL_INITIAL (decl
) = error_mark_node
;
3192 /* Say where in the source. */
3193 DECL_SOURCE_LOCATION (decl
) = location
;
3195 ent
->binding_level
= current_binding_level
;
3196 ent
->names_in_scope
= current_binding_level
->names
;
3198 for (use
= ent
->uses
; use
; use
= use
->next
)
3199 check_previous_goto (decl
, use
);
3206 /* Wrapper for define_label_1. */
3209 define_label (location_t location
, tree name
)
3212 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3213 ret
= define_label_1 (location
, name
);
3214 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3221 cp_binding_level
*level
;
3222 struct cp_switch
*next
;
3223 /* The SWITCH_STMT being built. */
3225 /* A splay-tree mapping the low element of a case range to the high
3226 element, or NULL_TREE if there is no high element. Used to
3227 determine whether or not a new case label duplicates an old case
3228 label. We need a tree, rather than simply a hash table, because
3229 of the GNU case range extension. */
3233 /* A stack of the currently active switch statements. The innermost
3234 switch statement is on the top of the stack. There is no need to
3235 mark the stack for garbage collection because it is only active
3236 during the processing of the body of a function, and we never
3237 collect at that point. */
3239 static struct cp_switch
*switch_stack
;
3241 /* Called right after a switch-statement condition is parsed.
3242 SWITCH_STMT is the switch statement being parsed. */
3245 push_switch (tree switch_stmt
)
3247 struct cp_switch
*p
= XNEW (struct cp_switch
);
3248 p
->level
= current_binding_level
;
3249 p
->next
= switch_stack
;
3250 p
->switch_stmt
= switch_stmt
;
3251 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3258 struct cp_switch
*cs
= switch_stack
;
3259 location_t switch_location
;
3261 /* Emit warnings as needed. */
3262 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3263 if (!processing_template_decl
)
3264 c_do_switch_warnings (cs
->cases
, switch_location
,
3265 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3266 SWITCH_STMT_COND (cs
->switch_stmt
));
3268 splay_tree_delete (cs
->cases
);
3269 switch_stack
= switch_stack
->next
;
3273 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3274 condition. Note that if TYPE and VALUE are already integral we don't
3275 really do the conversion because the language-independent
3276 warning/optimization code will work better that way. */
3279 case_conversion (tree type
, tree value
)
3281 if (value
== NULL_TREE
)
3284 if (cxx_dialect
>= cxx11
3285 && (SCOPED_ENUM_P (type
)
3286 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3288 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3289 type
= type_promotes_to (type
);
3290 value
= (perform_implicit_conversion_flags
3291 (type
, value
, tf_warning_or_error
,
3292 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3294 return cxx_constant_value (value
);
3297 /* Note that we've seen a definition of a case label, and complain if this
3298 is a bad place for one. */
3301 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3304 cp_binding_level
*p
;
3307 if (processing_template_decl
)
3311 /* For templates, just add the case label; we'll do semantic
3312 analysis at instantiation-time. */
3313 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3314 return add_stmt (build_case_label (low_value
, high_value
, label
));
3317 /* Find the condition on which this switch statement depends. */
3318 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3319 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3320 cond
= TREE_VALUE (cond
);
3322 if (!check_switch_goto (switch_stack
->level
))
3323 return error_mark_node
;
3325 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3327 low_value
= case_conversion (type
, low_value
);
3328 high_value
= case_conversion (type
, high_value
);
3330 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3331 low_value
, high_value
);
3333 /* After labels, make any new cleanups in the function go into their
3334 own new (temporary) binding contour. */
3335 for (p
= current_binding_level
;
3336 p
->kind
!= sk_function_parms
;
3338 p
->more_cleanups_ok
= 0;
3343 struct typename_info
{
3351 struct typename_hasher
: ggc_hasher
<tree
>
3353 typedef typename_info
*compare_type
;
3355 /* Hash a TYPENAME_TYPE. */
3362 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3363 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3368 /* Compare two TYPENAME_TYPEs. */
3371 equal (tree t1
, const typename_info
*t2
)
3373 return (TYPE_IDENTIFIER (t1
) == t2
->name
3374 && TYPE_CONTEXT (t1
) == t2
->scope
3375 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3376 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3377 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3381 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3382 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3384 Returns the new TYPENAME_TYPE. */
3386 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3389 build_typename_type (tree context
, tree name
, tree fullname
,
3390 enum tag_types tag_type
)
3398 if (typename_htab
== NULL
)
3399 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3401 ti
.scope
= FROB_CONTEXT (context
);
3403 ti
.template_id
= fullname
;
3404 ti
.enum_p
= tag_type
== enum_type
;
3405 ti
.class_p
= (tag_type
== class_type
3406 || tag_type
== record_type
3407 || tag_type
== union_type
);
3408 hash
= (htab_hash_pointer (ti
.scope
)
3409 ^ htab_hash_pointer (ti
.name
));
3411 /* See if we already have this type. */
3412 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3417 /* Build the TYPENAME_TYPE. */
3418 t
= cxx_make_type (TYPENAME_TYPE
);
3419 TYPE_CONTEXT (t
) = ti
.scope
;
3420 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3421 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3422 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3424 /* Build the corresponding TYPE_DECL. */
3425 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3426 TYPE_NAME (TREE_TYPE (d
)) = d
;
3427 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3428 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3429 DECL_ARTIFICIAL (d
) = 1;
3431 /* Store it in the hash table. */
3434 /* TYPENAME_TYPEs must always be compared structurally, because
3435 they may or may not resolve down to another type depending on
3436 the currently open classes. */
3437 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3443 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3444 provided to name the type. Returns an appropriate type, unless an
3445 error occurs, in which case error_mark_node is returned. If we
3446 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3447 return that, rather than the _TYPE it corresponds to, in other
3448 cases we look through the type decl. If TF_ERROR is set, complain
3449 about errors, otherwise be quiet. */
3452 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3453 tsubst_flags_t complain
)
3459 if (name
== error_mark_node
3460 || context
== NULL_TREE
3461 || context
== error_mark_node
)
3462 return error_mark_node
;
3466 if (!(TYPE_LANG_SPECIFIC (name
)
3467 && (CLASSTYPE_IS_TEMPLATE (name
)
3468 || CLASSTYPE_USE_TEMPLATE (name
))))
3469 name
= TYPE_IDENTIFIER (name
);
3471 /* Create a TEMPLATE_ID_EXPR for the type. */
3472 name
= build_nt (TEMPLATE_ID_EXPR
,
3473 CLASSTYPE_TI_TEMPLATE (name
),
3474 CLASSTYPE_TI_ARGS (name
));
3476 else if (TREE_CODE (name
) == TYPE_DECL
)
3477 name
= DECL_NAME (name
);
3481 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3483 name
= TREE_OPERAND (name
, 0);
3484 if (DECL_TYPE_TEMPLATE_P (name
))
3485 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3486 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3488 if (complain
& tf_error
)
3489 error ("%qD is not a type", name
);
3490 return error_mark_node
;
3493 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3495 if (complain
& tf_error
)
3496 error ("%qD used without template parameters", name
);
3497 return error_mark_node
;
3499 gcc_assert (identifier_p (name
));
3500 gcc_assert (TYPE_P (context
));
3502 if (!MAYBE_CLASS_TYPE_P (context
))
3504 if (complain
& tf_error
)
3505 error ("%q#T is not a class", context
);
3506 return error_mark_node
;
3509 /* When the CONTEXT is a dependent type, NAME could refer to a
3510 dependent base class of CONTEXT. But look inside it anyway
3511 if CONTEXT is a currently open scope, in case it refers to a
3512 member of the current instantiation or a non-dependent base;
3513 lookup will stop when we hit a dependent base. */
3514 if (!dependent_scope_p (context
))
3515 /* We should only set WANT_TYPE when we're a nested typename type.
3516 Then we can give better diagnostics if we find a non-type. */
3517 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3521 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3522 return build_typename_type (context
, name
, fullname
, tag_type
);
3524 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3528 if (complain
& tf_error
)
3529 error (want_template
? G_("no class template named %q#T in %q#T")
3530 : G_("no type named %q#T in %q#T"), name
, context
);
3531 return error_mark_node
;
3534 /* Pull out the template from an injected-class-name (or multiple). */
3536 t
= maybe_get_template_decl_from_type_decl (t
);
3538 if (TREE_CODE (t
) == TREE_LIST
)
3540 if (complain
& tf_error
)
3542 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3543 print_candidates (t
);
3545 return error_mark_node
;
3548 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3550 if (complain
& tf_error
)
3551 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3553 return error_mark_node
;
3555 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3557 if (complain
& tf_error
)
3558 error ("%<typename %T::%D%> names %q#T, which is not a type",
3560 return error_mark_node
;
3563 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3564 return error_mark_node
;
3566 /* If we are currently parsing a template and if T is a typedef accessed
3567 through CONTEXT then we need to remember and check access of T at
3568 template instantiation time. */
3569 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3572 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3574 /*entering_scope=*/0,
3575 complain
| tf_user
);
3577 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3580 maybe_record_typedef_use (t
);
3585 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3586 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3587 in which case error_mark_node is returned.
3589 If PARM_LIST is non-NULL, also make sure that the template parameter
3590 list of TEMPLATE_DECL matches.
3592 If COMPLAIN zero, don't complain about any errors that occur. */
3595 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3596 tsubst_flags_t complain
)
3602 name
= TYPE_IDENTIFIER (name
);
3603 else if (DECL_P (name
))
3604 name
= DECL_NAME (name
);
3605 gcc_assert (identifier_p (name
));
3607 if (!dependent_type_p (context
)
3608 || currently_open_class (context
))
3610 tree tmpl
= NULL_TREE
;
3612 if (MAYBE_CLASS_TYPE_P (context
))
3613 tmpl
= lookup_field (context
, name
, 0, false);
3615 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3616 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3618 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3620 if (complain
& tf_error
)
3621 error ("no class template named %q#T in %q#T", name
, context
);
3622 return error_mark_node
;
3626 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3628 if (complain
& tf_error
)
3630 error ("template parameters do not match template %qD", tmpl
);
3631 inform (DECL_SOURCE_LOCATION (tmpl
),
3632 "%qD declared here", tmpl
);
3634 return error_mark_node
;
3637 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3639 return error_mark_node
;
3644 /* Build the UNBOUND_CLASS_TEMPLATE. */
3645 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3646 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3647 TREE_TYPE (t
) = NULL_TREE
;
3648 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3650 /* Build the corresponding TEMPLATE_DECL. */
3651 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3652 TYPE_NAME (TREE_TYPE (d
)) = d
;
3653 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3654 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3655 DECL_ARTIFICIAL (d
) = 1;
3656 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3663 /* Push the declarations of builtin types into the namespace.
3664 RID_INDEX is the index of the builtin type in the array
3665 RID_POINTERS. NAME is the name used when looking up the builtin
3666 type. TYPE is the _TYPE node for the builtin type. */
3669 record_builtin_type (enum rid rid_index
,
3673 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3674 tree tdecl
= NULL_TREE
;
3676 if ((int) rid_index
< (int) RID_MAX
)
3677 rname
= ridpointers
[(int) rid_index
];
3679 tname
= get_identifier (name
);
3681 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3682 eliminated. Built-in types should not be looked up name; their
3683 names are keywords that the parser can recognize. However, there
3684 is code in c-common.c that uses identifier_global_value to look
3685 up built-in types by name. */
3688 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3689 DECL_ARTIFICIAL (tdecl
) = 1;
3690 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3696 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3697 DECL_ARTIFICIAL (tdecl
) = 1;
3699 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3702 if (!TYPE_NAME (type
))
3703 TYPE_NAME (type
) = tdecl
;
3706 debug_hooks
->type_decl (tdecl
, 0);
3709 /* Record one of the standard Java types.
3710 * Declare it as having the given NAME.
3711 * If SIZE > 0, it is the size of one of the integral types;
3712 * otherwise it is the negative of the size of one of the other types. */
3715 record_builtin_java_type (const char* name
, int size
)
3720 type
= build_nonstandard_integer_type (size
, 0);
3721 type
= build_distinct_type_copy (type
);
3723 else if (size
> -32)
3726 /* "__java_char" or ""__java_boolean". */
3727 type
= build_nonstandard_integer_type (-size
, 1);
3728 type
= build_distinct_type_copy (type
);
3729 /* Get the signed type cached and attached to the unsigned type,
3730 so it doesn't get garbage-collected at "random" times,
3731 causing potential codegen differences out of different UIDs
3732 and different alias set numbers. */
3733 stype
= build_nonstandard_integer_type (-size
, 0);
3734 stype
= build_distinct_type_copy (stype
);
3735 TREE_CHAIN (type
) = stype
;
3736 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3739 { /* "__java_float" or ""__java_double". */
3740 type
= make_node (REAL_TYPE
);
3741 TYPE_PRECISION (type
) = - size
;
3744 record_builtin_type (RID_MAX
, name
, type
);
3745 decl
= TYPE_NAME (type
);
3747 /* Suppress generate debug symbol entries for these types,
3748 since for normal C++ they are just clutter.
3749 However, push_lang_context undoes this if extern "Java" is seen. */
3750 DECL_IGNORED_P (decl
) = 1;
3752 TYPE_FOR_JAVA (type
) = 1;
3756 /* Push a type into the namespace so that the back ends ignore it. */
3759 record_unknown_type (tree type
, const char* name
)
3761 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3762 TYPE_DECL
, get_identifier (name
), type
));
3763 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3764 DECL_IGNORED_P (decl
) = 1;
3765 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3766 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3767 TYPE_ALIGN (type
) = 1;
3768 TYPE_USER_ALIGN (type
) = 0;
3769 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3772 /* A string for which we should create an IDENTIFIER_NODE at
3775 typedef struct predefined_identifier
3777 /* The name of the identifier. */
3778 const char *const name
;
3779 /* The place where the IDENTIFIER_NODE should be stored. */
3781 /* Nonzero if this is the name of a constructor or destructor. */
3782 const int ctor_or_dtor_p
;
3783 } predefined_identifier
;
3785 /* Create all the predefined identifiers. */
3788 initialize_predefined_identifiers (void)
3790 const predefined_identifier
*pid
;
3792 /* A table of identifiers to create at startup. */
3793 static const predefined_identifier predefined_identifiers
[] = {
3794 { "C++", &lang_name_cplusplus
, 0 },
3795 { "C", &lang_name_c
, 0 },
3796 { "Java", &lang_name_java
, 0 },
3797 /* Some of these names have a trailing space so that it is
3798 impossible for them to conflict with names written by users. */
3799 { "__ct ", &ctor_identifier
, 1 },
3800 { "__base_ctor ", &base_ctor_identifier
, 1 },
3801 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3802 { "__dt ", &dtor_identifier
, 1 },
3803 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3804 { "__base_dtor ", &base_dtor_identifier
, 1 },
3805 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3806 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3807 { "nelts", &nelts_identifier
, 0 },
3808 { THIS_NAME
, &this_identifier
, 0 },
3809 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3810 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3811 { "_vptr", &vptr_identifier
, 0 },
3812 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3813 { "::", &global_scope_name
, 0 },
3814 { "std", &std_identifier
, 0 },
3818 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3820 *pid
->node
= get_identifier (pid
->name
);
3821 if (pid
->ctor_or_dtor_p
)
3822 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3826 /* Create the predefined scalar types of C,
3827 and some nodes representing standard constants (0, 1, (void *)0).
3828 Initialize the global binding level.
3829 Make definitions for built-in primitive functions. */
3832 cxx_init_decl_processing (void)
3835 tree void_ftype_ptr
;
3837 /* Create all the identifiers we need. */
3838 initialize_predefined_identifiers ();
3840 /* Create the global variables. */
3841 push_to_top_level ();
3843 current_function_decl
= NULL_TREE
;
3844 current_binding_level
= NULL
;
3845 /* Enter the global namespace. */
3846 gcc_assert (global_namespace
== NULL_TREE
);
3847 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3849 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3850 TREE_PUBLIC (global_namespace
) = 1;
3851 begin_scope (sk_namespace
, global_namespace
);
3853 if (flag_visibility_ms_compat
)
3854 default_visibility
= VISIBILITY_HIDDEN
;
3857 current_lang_name
= lang_name_c
;
3859 /* Create the `std' namespace. */
3860 push_namespace (std_identifier
);
3861 std_node
= current_namespace
;
3864 c_common_nodes_and_builtins ();
3866 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3867 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3868 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3869 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3870 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3871 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3872 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3873 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3875 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3877 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3878 truthvalue_type_node
= boolean_type_node
;
3879 truthvalue_false_node
= boolean_false_node
;
3880 truthvalue_true_node
= boolean_true_node
;
3882 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3883 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3884 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3887 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3890 delta_type_node
= ptrdiff_type_node
;
3891 vtable_index_type
= ptrdiff_type_node
;
3893 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3894 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3895 void_ftype_ptr
= build_function_type_list (void_type_node
,
3896 ptr_type_node
, NULL_TREE
);
3898 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3900 /* C++ extensions */
3902 unknown_type_node
= make_node (LANG_TYPE
);
3903 record_unknown_type (unknown_type_node
, "unknown type");
3905 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3906 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3908 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3910 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3911 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3913 init_list_type_node
= make_node (LANG_TYPE
);
3914 record_unknown_type (init_list_type_node
, "init list");
3917 /* Make sure we get a unique function type, so we can give
3918 its pointer type a name. (This wins for gdb.) */
3919 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3920 TREE_TYPE (vfunc_type
) = integer_type_node
;
3921 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3922 layout_type (vfunc_type
);
3924 vtable_entry_type
= build_pointer_type (vfunc_type
);
3926 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3929 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3930 layout_type (vtbl_type_node
);
3931 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3932 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3933 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3934 layout_type (vtbl_ptr_type_node
);
3935 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3937 push_namespace (get_identifier ("__cxxabiv1"));
3938 abi_node
= current_namespace
;
3941 global_type_node
= make_node (LANG_TYPE
);
3942 record_unknown_type (global_type_node
, "global type");
3945 current_lang_name
= lang_name_cplusplus
;
3948 tree newattrs
, extvisattr
;
3949 tree newtype
, deltype
;
3950 tree ptr_ftype_sizetype
;
3954 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3955 if (cxx_dialect
== cxx98
)
3958 tree bad_alloc_type_node
;
3959 tree bad_alloc_decl
;
3961 push_namespace (std_identifier
);
3962 bad_alloc_id
= get_identifier ("bad_alloc");
3963 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3964 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3966 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3967 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3971 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3974 new_eh_spec
= noexcept_false_spec
;
3976 /* Ensure attribs.c is initialized. */
3978 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3980 newattrs
= tree_cons (get_identifier ("alloc_size"),
3981 build_tree_list (NULL_TREE
, integer_one_node
),
3983 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3984 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3985 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3986 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3987 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3988 DECL_IS_MALLOC (opnew
) = 1;
3989 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3990 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3991 DECL_IS_MALLOC (opnew
) = 1;
3992 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3993 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3994 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3995 if (flag_sized_deallocation
)
3997 /* Also push the sized deallocation variants:
3998 void operator delete(void*, std::size_t) throw();
3999 void operator delete[](void*, std::size_t) throw(); */
4000 tree void_ftype_ptr_size
4001 = build_function_type_list (void_type_node
, ptr_type_node
,
4002 size_type_node
, NULL_TREE
);
4003 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4005 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4006 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4007 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4010 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4011 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4012 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4013 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4014 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4015 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4016 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4017 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4021 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4022 ECF_NORETURN
| ECF_NOTHROW
);
4024 /* Perform other language dependent initializations. */
4025 init_class_processing ();
4026 init_rtti_processing ();
4027 init_template_processing ();
4029 if (flag_exceptions
)
4030 init_exception_processing ();
4032 if (! supports_one_only ())
4035 make_fname_decl
= cp_make_fname_decl
;
4036 start_fname_decls ();
4038 /* Show we use EH for cleanups. */
4039 if (flag_exceptions
)
4040 using_eh_for_cleanups ();
4043 /* Generate an initializer for a function naming variable from
4044 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4045 filled in with the type of the init. */
4048 cp_fname_init (const char* name
, tree
*type_p
)
4050 tree domain
= NULL_TREE
;
4052 tree init
= NULL_TREE
;
4057 length
= strlen (name
);
4058 domain
= build_index_type (size_int (length
));
4059 init
= build_string (length
+ 1, name
);
4062 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4063 type
= build_cplus_array_type (type
, domain
);
4068 TREE_TYPE (init
) = type
;
4070 init
= error_mark_node
;
4075 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4076 the decl, LOC is the location to give the decl, NAME is the
4077 initialization string and TYPE_DEP indicates whether NAME depended
4078 on the type of the function. We make use of that to detect
4079 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4080 at the point of first use, so we mustn't push the decl now. */
4083 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4085 const char *const name
= (type_dep
&& processing_template_decl
4086 ? NULL
: fname_as_string (type_dep
));
4088 tree init
= cp_fname_init (name
, &type
);
4089 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4092 free (CONST_CAST (char *, name
));
4094 /* As we're using pushdecl_with_scope, we must set the context. */
4095 DECL_CONTEXT (decl
) = current_function_decl
;
4097 TREE_STATIC (decl
) = 1;
4098 TREE_READONLY (decl
) = 1;
4099 DECL_ARTIFICIAL (decl
) = 1;
4101 TREE_USED (decl
) = 1;
4103 if (current_function_decl
)
4105 cp_binding_level
*b
= current_binding_level
;
4106 if (b
->kind
== sk_function_parms
)
4107 return error_mark_node
;
4108 while (b
->level_chain
->kind
!= sk_function_parms
)
4110 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4111 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4112 LOOKUP_ONLYCONVERTING
);
4116 DECL_THIS_STATIC (decl
) = true;
4117 pushdecl_top_level_and_finish (decl
, init
);
4124 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4126 tree id
= DECL_NAME (decl
);
4127 const char *name
= IDENTIFIER_POINTER (id
);
4129 retrofit_lang_decl (decl
);
4131 DECL_ARTIFICIAL (decl
) = 1;
4132 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4133 SET_DECL_LANGUAGE (decl
, lang_c
);
4134 /* Runtime library routines are, by definition, available in an
4135 external shared object. */
4136 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4137 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4139 DECL_CONTEXT (decl
) = context
;
4142 pushdecl_top_level (decl
);
4146 /* A function in the user's namespace should have an explicit
4147 declaration before it is used. Mark the built-in function as
4148 anticipated but not actually declared. */
4149 if (name
[0] != '_' || name
[1] != '_')
4150 DECL_ANTICIPATED (decl
) = 1;
4151 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4153 size_t len
= strlen (name
);
4155 /* Treat __*_chk fortification functions as anticipated as well,
4156 unless they are __builtin_*. */
4157 if (len
> strlen ("___chk")
4158 && memcmp (name
+ len
- strlen ("_chk"),
4159 "_chk", strlen ("_chk") + 1) == 0)
4160 DECL_ANTICIPATED (decl
) = 1;
4167 cxx_builtin_function (tree decl
)
4169 tree id
= DECL_NAME (decl
);
4170 const char *name
= IDENTIFIER_POINTER (id
);
4171 /* All builtins that don't begin with an '_' should additionally
4172 go in the 'std' namespace. */
4175 tree decl2
= copy_node(decl
);
4176 push_namespace (std_identifier
);
4177 builtin_function_1 (decl2
, std_node
, false);
4181 return builtin_function_1 (decl
, NULL_TREE
, false);
4184 /* Like cxx_builtin_function, but guarantee the function is added to the global
4185 scope. This is to allow function specific options to add new machine
4186 dependent builtins when the target ISA changes via attribute((target(...)))
4187 which saves space on program startup if the program does not use non-generic
4191 cxx_builtin_function_ext_scope (tree decl
)
4194 tree id
= DECL_NAME (decl
);
4195 const char *name
= IDENTIFIER_POINTER (id
);
4196 /* All builtins that don't begin with an '_' should additionally
4197 go in the 'std' namespace. */
4200 tree decl2
= copy_node(decl
);
4201 push_namespace (std_identifier
);
4202 builtin_function_1 (decl2
, std_node
, true);
4206 return builtin_function_1 (decl
, NULL_TREE
, true);
4209 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4210 function. Not called directly. */
4213 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4216 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4217 DECL_EXTERNAL (fn
) = 1;
4218 TREE_PUBLIC (fn
) = 1;
4219 DECL_ARTIFICIAL (fn
) = 1;
4220 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4221 SET_DECL_LANGUAGE (fn
, lang_c
);
4222 /* Runtime library routines are, by definition, available in an
4223 external shared object. */
4224 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4225 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4226 set_call_expr_flags (fn
, ecf_flags
);
4230 /* Returns the _DECL for a library function with C++ linkage. */
4233 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4236 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4237 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4238 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4242 /* Like build_library_fn, but takes a C string instead of an
4246 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4248 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4251 /* Like build_cp_library_fn, but takes a C string instead of an
4255 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4257 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4261 /* Like build_library_fn, but also pushes the function so that we will
4262 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4263 may throw exceptions listed in RAISES. */
4266 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4271 type
= build_exception_variant (type
, raises
);
4273 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4274 pushdecl_top_level (fn
);
4278 /* Like build_cp_library_fn, but also pushes the function so that it
4279 will be found by normal lookup. */
4282 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4285 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4290 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4294 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4298 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4300 tree type
= build_function_type (void_type_node
, parmtypes
);
4301 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4304 /* Like push_library_fn, but also note that this function throws
4305 and does not return. Used for __throw_foo and the like. */
4308 push_throw_library_fn (tree name
, tree type
)
4310 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4314 /* When we call finish_struct for an anonymous union, we create
4315 default copy constructors and such. But, an anonymous union
4316 shouldn't have such things; this function undoes the damage to the
4317 anonymous union type T.
4319 (The reason that we create the synthesized methods is that we don't
4320 distinguish `union { int i; }' from `typedef union { int i; } U'.
4321 The first is an anonymous union; the second is just an ordinary
4325 fixup_anonymous_aggr (tree t
)
4329 /* Wipe out memory of synthesized methods. */
4330 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4331 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4332 TYPE_HAS_COPY_CTOR (t
) = 0;
4333 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4334 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4335 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4337 /* Splice the implicitly generated functions out of the TYPE_METHODS
4339 q
= &TYPE_METHODS (t
);
4342 if (DECL_ARTIFICIAL (*q
))
4343 *q
= TREE_CHAIN (*q
);
4345 q
= &DECL_CHAIN (*q
);
4348 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4349 if (TYPE_METHODS (t
))
4351 tree decl
= TYPE_MAIN_DECL (t
);
4353 if (TREE_CODE (t
) != UNION_TYPE
)
4354 error_at (DECL_SOURCE_LOCATION (decl
),
4355 "an anonymous struct cannot have function members");
4357 error_at (DECL_SOURCE_LOCATION (decl
),
4358 "an anonymous union cannot have function members");
4361 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4362 assignment operators (because they cannot have these methods themselves).
4363 For anonymous unions this is already checked because they are not allowed
4364 in any union, otherwise we have to check it. */
4365 if (TREE_CODE (t
) != UNION_TYPE
)
4369 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4370 if (TREE_CODE (field
) == FIELD_DECL
)
4372 type
= TREE_TYPE (field
);
4373 if (CLASS_TYPE_P (type
))
4375 if (TYPE_NEEDS_CONSTRUCTING (type
))
4376 error ("member %q+#D with constructor not allowed "
4377 "in anonymous aggregate", field
);
4378 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4379 error ("member %q+#D with destructor not allowed "
4380 "in anonymous aggregate", field
);
4381 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4382 error ("member %q+#D with copy assignment operator "
4383 "not allowed in anonymous aggregate", field
);
4389 /* Warn for an attribute located at LOCATION that appertains to the
4390 class type CLASS_TYPE that has not been properly placed after its
4391 class-key, in it class-specifier. */
4394 warn_misplaced_attr_for_class_type (source_location location
,
4397 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4399 if (warning_at (location
, OPT_Wattributes
,
4400 "attribute ignored in declaration "
4401 "of %q#T", class_type
))
4403 "attribute for %q#T must follow the %qs keyword",
4404 class_type
, class_key_or_enum_as_string (class_type
));
4407 /* Make sure that a declaration with no declarator is well-formed, i.e.
4408 just declares a tagged type or anonymous union.
4410 Returns the type declared; or NULL_TREE if none. */
4413 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4414 bool explicit_type_instantiation_p
)
4416 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4417 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4418 /* If a class, struct, or enum type is declared by the DECLSPECS
4419 (i.e, if a class-specifier, enum-specifier, or non-typename
4420 elaborated-type-specifier appears in the DECLSPECS),
4421 DECLARED_TYPE is set to the corresponding type. */
4422 tree declared_type
= NULL_TREE
;
4423 bool error_p
= false;
4425 if (declspecs
->multiple_types_p
)
4426 error ("multiple types in one declaration");
4427 else if (declspecs
->redefined_builtin_type
)
4429 if (!in_system_header_at (input_location
))
4430 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4431 "redeclaration of C++ built-in type %qT",
4432 declspecs
->redefined_builtin_type
);
4437 && TYPE_P (declspecs
->type
)
4438 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4439 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4440 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4441 declared_type
= declspecs
->type
;
4442 else if (declspecs
->type
== error_mark_node
)
4444 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4445 permerror (input_location
, "declaration does not declare anything");
4446 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4448 error ("%<auto%> can only be specified for variables "
4449 "or function declarations");
4450 return error_mark_node
;
4452 /* Check for an anonymous union. */
4453 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4454 && TYPE_ANONYMOUS_P (declared_type
))
4456 /* 7/3 In a simple-declaration, the optional init-declarator-list
4457 can be omitted only when declaring a class (clause 9) or
4458 enumeration (7.2), that is, when the decl-specifier-seq contains
4459 either a class-specifier, an elaborated-type-specifier with
4460 a class-key (9.1), or an enum-specifier. In these cases and
4461 whenever a class-specifier or enum-specifier is present in the
4462 decl-specifier-seq, the identifiers in these specifiers are among
4463 the names being declared by the declaration (as class-name,
4464 enum-names, or enumerators, depending on the syntax). In such
4465 cases, and except for the declaration of an unnamed bit-field (9.6),
4466 the decl-specifier-seq shall introduce one or more names into the
4467 program, or shall redeclare a name introduced by a previous
4468 declaration. [Example:
4469 enum { }; // ill-formed
4470 typedef class { }; // ill-formed
4474 error ("missing type-name in typedef-declaration");
4477 /* Anonymous unions are objects, so they can have specifiers. */;
4478 SET_ANON_AGGR_TYPE_P (declared_type
);
4480 if (TREE_CODE (declared_type
) != UNION_TYPE
4481 && !in_system_header_at (input_location
))
4482 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4487 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4488 error_at (declspecs
->locations
[ds_inline
],
4489 "%<inline%> can only be specified for functions");
4490 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4491 error_at (declspecs
->locations
[ds_virtual
],
4492 "%<virtual%> can only be specified for functions");
4494 && (!current_class_type
4495 || current_scope () != current_class_type
))
4496 error_at (declspecs
->locations
[ds_friend
],
4497 "%<friend%> can only be specified inside a class");
4498 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4499 error_at (declspecs
->locations
[ds_explicit
],
4500 "%<explicit%> can only be specified for constructors");
4501 else if (declspecs
->storage_class
)
4502 error_at (declspecs
->locations
[ds_storage_class
],
4503 "a storage class can only be specified for objects "
4505 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4506 error_at (declspecs
->locations
[ds_const
],
4507 "%<const%> can only be specified for objects and "
4509 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4510 error_at (declspecs
->locations
[ds_volatile
],
4511 "%<volatile%> can only be specified for objects and "
4513 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4514 error_at (declspecs
->locations
[ds_restrict
],
4515 "%<__restrict%> can only be specified for objects and "
4517 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4518 error_at (declspecs
->locations
[ds_thread
],
4519 "%<__thread%> can only be specified for objects "
4521 else if (saw_typedef
)
4522 warning_at (declspecs
->locations
[ds_typedef
], 0,
4523 "%<typedef%> was ignored in this declaration");
4524 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4525 error_at (declspecs
->locations
[ds_constexpr
],
4526 "%<constexpr%> cannot be used for type declarations");
4529 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4532 if (!CLASS_TYPE_P (declared_type
)
4533 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4534 /* For a non-template class, use the name location. */
4535 loc
= location_of (declared_type
);
4537 /* For a template class (an explicit instantiation), use the
4538 current location. */
4539 loc
= input_location
;
4541 if (explicit_type_instantiation_p
)
4542 /* [dcl.attr.grammar]/4:
4544 No attribute-specifier-seq shall appertain to an explicit
4547 if (warning_at (loc
, OPT_Wattributes
,
4548 "attribute ignored in explicit instantiation %q#T",
4551 "no attribute can be applied to "
4552 "an explicit instantiation");
4555 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4558 return declared_type
;
4561 /* Called when a declaration is seen that contains no names to declare.
4562 If its type is a reference to a structure, union or enum inherited
4563 from a containing scope, shadow that tag name for the current scope
4564 with a forward reference.
4565 If its type defines a new named structure or union
4566 or defines an enum, it is valid but we need not do anything here.
4567 Otherwise, it is an error.
4569 C++: may have to grok the declspecs to learn about static,
4570 complain for anonymous unions.
4572 Returns the TYPE declared -- or NULL_TREE if none. */
4575 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4577 tree t
= check_tag_decl (declspecs
,
4578 /*explicit_type_instantiation_p=*/false);
4583 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4586 /* This is where the variables in an anonymous union are
4587 declared. An anonymous union declaration looks like:
4589 because there is no declarator after the union, the parser
4590 sends that declaration here. */
4591 if (ANON_AGGR_TYPE_P (t
))
4593 fixup_anonymous_aggr (t
);
4595 if (TYPE_FIELDS (t
))
4597 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4598 declspecs
, NORMAL
, 0, NULL
);
4599 finish_anon_union (decl
);
4606 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4609 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4610 const cp_declarator
*declarator
,
4611 bool is_template_arg
)
4615 enum decl_context context
4616 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4617 attrs
= type_specifiers
->attributes
;
4618 type_specifiers
->attributes
= NULL_TREE
;
4619 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4620 if (attrs
&& type
!= error_mark_node
)
4622 if (CLASS_TYPE_P (type
))
4623 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4624 "outside of definition", type
);
4625 else if (MAYBE_CLASS_TYPE_P (type
))
4626 /* A template type parameter or other dependent type. */
4627 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4628 "type %qT without an associated declaration", type
);
4630 cplus_decl_attributes (&type
, attrs
, 0);
4635 /* Process a DECLARATOR for a function-scope variable declaration,
4636 namespace-scope variable declaration, or function declaration.
4637 (Function definitions go through start_function; class member
4638 declarations appearing in the body of the class go through
4639 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4640 If an error occurs, the error_mark_node is returned instead.
4642 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4643 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4644 for an explicitly defaulted function, or SD_DELETED for an explicitly
4645 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4646 implicitly initialized via a default constructor. ATTRIBUTES and
4647 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4649 The scope represented by the context of the returned DECL is pushed
4650 (if it is not the global namespace) and is assigned to
4651 *PUSHED_SCOPE_P. The caller is then responsible for calling
4652 pop_scope on *PUSHED_SCOPE_P if it is set. */
4655 start_decl (const cp_declarator
*declarator
,
4656 cp_decl_specifier_seq
*declspecs
,
4659 tree prefix_attributes
,
4660 tree
*pushed_scope_p
)
4668 *pushed_scope_p
= NULL_TREE
;
4670 /* An object declared as __attribute__((deprecated)) suppresses
4671 warnings of uses of other deprecated items. */
4672 if (lookup_attribute ("deprecated", attributes
))
4673 deprecated_state
= DEPRECATED_SUPPRESS
;
4675 attributes
= chainon (attributes
, prefix_attributes
);
4677 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4680 deprecated_state
= DEPRECATED_NORMAL
;
4682 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4683 || decl
== error_mark_node
)
4684 return error_mark_node
;
4686 context
= CP_DECL_CONTEXT (decl
);
4687 if (context
!= global_namespace
)
4688 *pushed_scope_p
= push_scope (context
);
4690 /* Is it valid for this decl to have an initializer at all?
4691 If not, set INITIALIZED to zero, which will indirectly
4692 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4694 && TREE_CODE (decl
) == TYPE_DECL
)
4696 error ("typedef %qD is initialized (use decltype instead)", decl
);
4697 return error_mark_node
;
4702 if (! toplevel_bindings_p ()
4703 && DECL_EXTERNAL (decl
))
4704 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4706 DECL_EXTERNAL (decl
) = 0;
4707 if (toplevel_bindings_p ())
4708 TREE_STATIC (decl
) = 1;
4710 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4712 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4713 record_key_method_defined (decl
);
4715 /* If this is a typedef that names the class for linkage purposes
4716 (7.1.3p8), apply any attributes directly to the type. */
4717 if (TREE_CODE (decl
) == TYPE_DECL
4718 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4719 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4720 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4724 /* Set attributes here so if duplicate decl, will have proper attributes. */
4725 cplus_decl_attributes (&decl
, attributes
, flags
);
4727 /* Dllimported symbols cannot be defined. Static data members (which
4728 can be initialized in-class and dllimported) go through grokfield,
4729 not here, so we don't need to exclude those decls when checking for
4731 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4733 error ("definition of %q#D is marked %<dllimport%>", decl
);
4734 DECL_DLLIMPORT_P (decl
) = 0;
4737 /* If #pragma weak was used, mark the decl weak now. */
4738 if (!processing_template_decl
)
4739 maybe_apply_pragma_weak (decl
);
4741 if (TREE_CODE (decl
) == FUNCTION_DECL
4742 && DECL_DECLARED_INLINE_P (decl
)
4743 && DECL_UNINLINABLE (decl
)
4744 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4745 warning (0, "inline function %q+D given attribute noinline", decl
);
4747 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4749 bool this_tmpl
= (processing_template_decl
4750 > template_class_depth (context
));
4753 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4754 if (field
== NULL_TREE
4755 || !(VAR_P (field
) || variable_template_p (field
)))
4756 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4757 else if (variable_template_p (field
) && !this_tmpl
)
4759 if (DECL_LANG_SPECIFIC (decl
)
4760 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4761 /* OK, specialization was already checked. */;
4764 error_at (DECL_SOURCE_LOCATION (decl
),
4765 "non-member-template declaration of %qD", decl
);
4766 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4767 "member template declaration here");
4768 return error_mark_node
;
4773 if (variable_template_p (field
))
4774 field
= DECL_TEMPLATE_RESULT (field
);
4776 if (DECL_CONTEXT (field
) != context
)
4778 if (!same_type_p (DECL_CONTEXT (field
), context
))
4779 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4780 "to be defined as %<%T::%D%>",
4781 DECL_CONTEXT (field
), DECL_NAME (decl
),
4782 context
, DECL_NAME (decl
));
4783 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4785 /* Static data member are tricky; an in-class initialization
4786 still doesn't provide a definition, so the in-class
4787 declaration will have DECL_EXTERNAL set, but will have an
4788 initialization. Thus, duplicate_decls won't warn
4789 about this situation, and so we check here. */
4790 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4791 error ("duplicate initialization of %qD", decl
);
4792 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4794 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4795 && !DECL_DECLARED_CONSTEXPR_P (field
))
4796 error ("%qD declared %<constexpr%> outside its class", field
);
4801 tree field
= check_classfn (context
, decl
,
4803 ? current_template_parms
4805 if (field
&& field
!= error_mark_node
4806 && duplicate_decls (decl
, field
,
4807 /*newdecl_is_friend=*/false))
4811 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4812 DECL_IN_AGGR_P (decl
) = 0;
4813 /* Do not mark DECL as an explicit specialization if it was not
4814 already marked as an instantiation; a declaration should
4815 never be marked as a specialization unless we know what
4816 template is being specialized. */
4817 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4819 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4820 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4821 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4822 && DECL_DECLARED_INLINE_P (decl
));
4824 DECL_COMDAT (decl
) = false;
4826 /* [temp.expl.spec] An explicit specialization of a static data
4827 member of a template is a definition if the declaration
4828 includes an initializer; otherwise, it is a declaration.
4830 We check for processing_specialization so this only applies
4831 to the new specialization syntax. */
4832 if (!initialized
&& processing_specialization
)
4833 DECL_EXTERNAL (decl
) = 1;
4836 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4837 /* Aliases are definitions. */
4839 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4843 was_public
= TREE_PUBLIC (decl
);
4845 /* Enter this declaration into the symbol table. Don't push the plain
4846 VAR_DECL for a variable template. */
4847 if (!template_parm_scope_p ()
4848 || TREE_CODE (decl
) != VAR_DECL
)
4849 decl
= maybe_push_decl (decl
);
4851 if (processing_template_decl
)
4852 decl
= push_template_decl (decl
);
4853 if (decl
== error_mark_node
)
4854 return error_mark_node
;
4857 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4858 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4860 /* This is a const variable with implicit 'static'. Set
4861 DECL_THIS_STATIC so we can tell it from variables that are
4862 !TREE_PUBLIC because of the anonymous namespace. */
4863 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4864 DECL_THIS_STATIC (decl
) = 1;
4867 if (current_function_decl
&& VAR_P (decl
)
4868 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4871 if (DECL_THREAD_LOCAL_P (decl
))
4872 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4874 else if (TREE_STATIC (decl
))
4875 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4879 cp_function_chain
->invalid_constexpr
= true;
4882 if (!processing_template_decl
&& VAR_P (decl
))
4883 start_decl_1 (decl
, initialized
);
4888 /* Process the declaration of a variable DECL. INITIALIZED is true
4889 iff DECL is explicitly initialized. (INITIALIZED is false if the
4890 variable is initialized via an implicitly-called constructor.)
4891 This function must be called for ordinary variables (including, for
4892 example, implicit instantiations of templates), but must not be
4893 called for template declarations. */
4896 start_decl_1 (tree decl
, bool initialized
)
4900 bool aggregate_definition_p
;
4902 gcc_assert (!processing_template_decl
);
4904 if (error_operand_p (decl
))
4907 gcc_assert (VAR_P (decl
));
4909 type
= TREE_TYPE (decl
);
4910 complete_p
= COMPLETE_TYPE_P (type
);
4911 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4913 /* If an explicit initializer is present, or if this is a definition
4914 of an aggregate, then we need a complete type at this point.
4915 (Scalars are always complete types, so there is nothing to
4916 check.) This code just sets COMPLETE_P; errors (if necessary)
4917 are issued below. */
4918 if ((initialized
|| aggregate_definition_p
)
4920 && COMPLETE_TYPE_P (complete_type (type
)))
4923 /* We will not yet have set TREE_READONLY on DECL if the type
4924 was "const", but incomplete, before this point. But, now, we
4925 have a complete type, so we can try again. */
4926 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4930 /* Is it valid for this decl to have an initializer at all? */
4932 /* Don't allow initializations for incomplete types except for
4933 arrays which might be completed by the initialization. */
4935 ; /* A complete type is ok. */
4936 else if (type_uses_auto (type
))
4937 ; /* An auto type is ok. */
4938 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4940 error ("variable %q#D has initializer but incomplete type", decl
);
4941 type
= TREE_TYPE (decl
) = error_mark_node
;
4943 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4945 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4946 error ("elements of array %q#D have incomplete type", decl
);
4947 /* else we already gave an error in start_decl. */
4950 else if (aggregate_definition_p
&& !complete_p
)
4952 if (type_uses_auto (type
))
4953 error ("declaration of %q#D has no initializer", decl
);
4955 error ("aggregate %q#D has incomplete type and cannot be defined",
4957 /* Change the type so that assemble_variable will give
4958 DECL an rtl we can live with: (mem (const_int 0)). */
4959 type
= TREE_TYPE (decl
) = error_mark_node
;
4962 /* Create a new scope to hold this declaration if necessary.
4963 Whether or not a new scope is necessary cannot be determined
4964 until after the type has been completed; if the type is a
4965 specialization of a class template it is not until after
4966 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4967 will be set correctly. */
4968 maybe_push_cleanup_level (type
);
4971 /* Handle initialization of references. DECL, TYPE, and INIT have the
4972 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4973 but will be set to a new CLEANUP_STMT if a temporary is created
4974 that must be destroyed subsequently.
4976 Returns an initializer expression to use to initialize DECL, or
4977 NULL if the initialization can be performed statically.
4979 Quotes on semantics can be found in ARM 8.4.3. */
4982 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4984 if (init
== NULL_TREE
)
4986 if ((DECL_LANG_SPECIFIC (decl
) == 0
4987 || DECL_IN_AGGR_P (decl
) == 0)
4988 && ! DECL_THIS_EXTERN (decl
))
4989 error ("%qD declared as reference but not initialized", decl
);
4993 if (TREE_CODE (init
) == TREE_LIST
)
4994 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4995 tf_warning_or_error
);
4997 tree ttype
= TREE_TYPE (type
);
4998 if (TREE_CODE (ttype
) != ARRAY_TYPE
4999 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
5000 /* Note: default conversion is only called in very special cases. */
5001 init
= decay_conversion (init
, tf_warning_or_error
);
5003 /* check_initializer handles this for non-reference variables, but for
5004 references we need to do it here or the initializer will get the
5005 incomplete array type and confuse later calls to
5006 cp_complete_array_type. */
5007 if (TREE_CODE (ttype
) == ARRAY_TYPE
5008 && TYPE_DOMAIN (ttype
) == NULL_TREE
5009 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
5010 || TREE_CODE (init
) == STRING_CST
))
5012 cp_complete_array_type (&ttype
, init
, false);
5013 if (ttype
!= TREE_TYPE (type
))
5014 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5017 /* Convert INIT to the reference type TYPE. This may involve the
5018 creation of a temporary, whose lifetime must be the same as that
5019 of the reference. If so, a DECL_EXPR for the temporary will be
5020 added just after the DECL_EXPR for DECL. That's why we don't set
5021 DECL_INITIAL for local references (instead assigning to them
5022 explicitly); we need to allow the temporary to be initialized
5024 return initialize_reference (type
, init
, flags
,
5025 tf_warning_or_error
);
5028 /* Designated initializers in arrays are not supported in GNU C++.
5029 The parser cannot detect this error since it does not know whether
5030 a given brace-enclosed initializer is for a class type or for an
5031 array. This function checks that CE does not use a designated
5032 initializer. If it does, an error is issued. Returns true if CE
5033 is valid, i.e., does not have a designated initializer. */
5036 check_array_designated_initializer (constructor_elt
*ce
,
5037 unsigned HOST_WIDE_INT index
)
5039 /* Designated initializers for array elements are not supported. */
5042 /* The parser only allows identifiers as designated
5044 if (ce
->index
== error_mark_node
)
5046 error ("name used in a GNU-style designated "
5047 "initializer for an array");
5050 else if (identifier_p (ce
->index
))
5052 error ("name %qD used in a GNU-style designated "
5053 "initializer for an array", ce
->index
);
5057 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5060 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5061 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5064 /* A C99 designator is OK if it matches the current index. */
5065 if (wi::eq_p (ce_index
, index
))
5068 sorry ("non-trivial designated initializers not supported");
5071 error ("C99 designator %qE is not an integral constant-expression",
5080 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5081 array until we finish parsing the initializer. If that's the
5082 situation we're in, update DECL accordingly. */
5085 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5087 tree type
= TREE_TYPE (decl
);
5089 if (TREE_CODE (type
) == ARRAY_TYPE
5090 && TYPE_DOMAIN (type
) == NULL_TREE
5091 && TREE_CODE (decl
) != TYPE_DECL
)
5093 /* do_default is really a C-ism to deal with tentative definitions.
5094 But let's leave it here to ease the eventual merge. */
5095 int do_default
= !DECL_EXTERNAL (decl
);
5096 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5099 /* Check that there are no designated initializers in INIT, as
5100 those are not supported in GNU C++, and as the middle-end
5101 will crash if presented with a non-numeric designated
5103 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5105 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5106 constructor_elt
*ce
;
5108 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5109 if (!check_array_designated_initializer (ce
, i
))
5115 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5119 error ("initializer fails to determine size of %qD", decl
);
5121 else if (failure
== 2)
5125 error ("array size missing in %qD", decl
);
5127 /* If a `static' var's size isn't known, make it extern as
5128 well as static, so it does not get allocated. If it's not
5129 `static', then don't mark it extern; finish_incomplete_decl
5130 will give it a default size and it will get allocated. */
5131 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5132 DECL_EXTERNAL (decl
) = 1;
5134 else if (failure
== 3)
5136 error ("zero-size array %qD", decl
);
5140 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5142 relayout_decl (decl
);
5146 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5147 any appropriate error messages regarding the layout. */
5150 layout_var_decl (tree decl
)
5154 type
= TREE_TYPE (decl
);
5155 if (type
== error_mark_node
)
5158 /* If we haven't already laid out this declaration, do so now.
5159 Note that we must not call complete type for an external object
5160 because it's type might involve templates that we are not
5161 supposed to instantiate yet. (And it's perfectly valid to say
5162 `extern X x' for some incomplete type `X'.) */
5163 if (!DECL_EXTERNAL (decl
))
5164 complete_type (type
);
5165 if (!DECL_SIZE (decl
)
5166 && TREE_TYPE (decl
) != error_mark_node
5167 && (COMPLETE_TYPE_P (type
)
5168 || (TREE_CODE (type
) == ARRAY_TYPE
5169 && !TYPE_DOMAIN (type
)
5170 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5171 layout_decl (decl
, 0);
5173 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5175 /* An automatic variable with an incomplete type: that is an error.
5176 Don't talk about array types here, since we took care of that
5177 message in grokdeclarator. */
5178 error ("storage size of %qD isn%'t known", decl
);
5179 TREE_TYPE (decl
) = error_mark_node
;
5182 /* Keep this code around in case we later want to control debug info
5183 based on whether a type is "used". (jason 1999-11-11) */
5185 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5186 /* Let debugger know it should output info for this type. */
5187 note_debug_info_needed (ttype
);
5189 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5190 note_debug_info_needed (DECL_CONTEXT (decl
));
5193 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5194 && DECL_SIZE (decl
) != NULL_TREE
5195 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5197 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5198 constant_expression_warning (DECL_SIZE (decl
));
5201 error ("storage size of %qD isn%'t constant", decl
);
5202 TREE_TYPE (decl
) = error_mark_node
;
5207 /* If a local static variable is declared in an inline function, or if
5208 we have a weak definition, we must endeavor to create only one
5209 instance of the variable at link-time. */
5212 maybe_commonize_var (tree decl
)
5214 /* Static data in a function with comdat linkage also has comdat
5216 if (TREE_STATIC (decl
)
5217 /* Don't mess with __FUNCTION__. */
5218 && ! DECL_ARTIFICIAL (decl
)
5219 && DECL_FUNCTION_SCOPE_P (decl
)
5220 && vague_linkage_p (DECL_CONTEXT (decl
)))
5224 /* With weak symbols, we simply make the variable COMDAT;
5225 that will cause copies in multiple translations units to
5227 comdat_linkage (decl
);
5231 if (DECL_INITIAL (decl
) == NULL_TREE
5232 || DECL_INITIAL (decl
) == error_mark_node
)
5234 /* Without weak symbols, we can use COMMON to merge
5235 uninitialized variables. */
5236 TREE_PUBLIC (decl
) = 1;
5237 DECL_COMMON (decl
) = 1;
5241 /* While for initialized variables, we must use internal
5242 linkage -- which means that multiple copies will not
5244 TREE_PUBLIC (decl
) = 0;
5245 DECL_COMMON (decl
) = 0;
5246 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5247 "sorry: semantics of inline function static "
5248 "data %q#D are wrong (you%'ll wind up "
5249 "with multiple copies)", decl
))
5250 inform (DECL_SOURCE_LOCATION (decl
),
5251 "you can work around this by removing the initializer");
5257 /* Issue an error message if DECL is an uninitialized const variable. */
5260 check_for_uninitialized_const_var (tree decl
)
5262 tree type
= strip_array_types (TREE_TYPE (decl
));
5264 /* ``Unless explicitly declared extern, a const object does not have
5265 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5268 && TREE_CODE (type
) != REFERENCE_TYPE
5269 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5270 && !DECL_INITIAL (decl
))
5272 tree field
= default_init_uninitialized_part (type
);
5276 if (CP_TYPE_CONST_P (type
))
5277 permerror (DECL_SOURCE_LOCATION (decl
),
5278 "uninitialized const %qD", decl
);
5281 error_at (DECL_SOURCE_LOCATION (decl
),
5282 "uninitialized variable %qD in %<constexpr%> function",
5284 cp_function_chain
->invalid_constexpr
= true;
5287 if (CLASS_TYPE_P (type
))
5289 tree defaulted_ctor
;
5291 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5292 "%q#T has no user-provided default constructor", type
);
5293 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5295 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5296 "constructor is not user-provided because it is "
5297 "explicitly defaulted in the class body");
5298 inform (0, "and the implicitly-defined constructor does not "
5299 "initialize %q+#D", field
);
5304 /* Structure holding the current initializer being processed by reshape_init.
5305 CUR is a pointer to the current element being processed, END is a pointer
5306 after the last element present in the initializer. */
5307 typedef struct reshape_iterator_t
5309 constructor_elt
*cur
;
5310 constructor_elt
*end
;
5313 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5315 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5316 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5317 initialized. If there are no more such fields, the return value
5321 next_initializable_field (tree field
)
5324 && (TREE_CODE (field
) != FIELD_DECL
5325 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5326 || DECL_ARTIFICIAL (field
)))
5327 field
= DECL_CHAIN (field
);
5332 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5333 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5334 INTEGER_CST representing the size of the array minus one (the maximum index),
5335 or NULL_TREE if the array was declared without specifying the size. D is
5336 the iterator within the constructor. */
5339 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5340 tsubst_flags_t complain
)
5343 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5344 unsigned HOST_WIDE_INT max_index_cst
= 0;
5345 unsigned HOST_WIDE_INT index
;
5347 /* The initializer for an array is always a CONSTRUCTOR. */
5348 new_init
= build_constructor (init_list_type_node
, NULL
);
5352 /* Minus 1 is used for zero sized arrays. */
5353 if (integer_all_onesp (max_index
))
5356 if (tree_fits_uhwi_p (max_index
))
5357 max_index_cst
= tree_to_uhwi (max_index
);
5358 /* sizetype is sign extended, not zero extended. */
5360 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5363 /* Loop until there are no more initializers. */
5365 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5369 constructor_elt
*old_cur
= d
->cur
;
5371 check_array_designated_initializer (d
->cur
, index
);
5372 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5374 if (elt_init
== error_mark_node
)
5375 return error_mark_node
;
5376 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5377 size_int (index
), elt_init
);
5378 if (!TREE_CONSTANT (elt_init
))
5379 TREE_CONSTANT (new_init
) = false;
5381 /* This can happen with an invalid initializer (c++/54501). */
5382 if (d
->cur
== old_cur
&& !sized_array_p
)
5389 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5390 Parameters are the same of reshape_init_r. */
5393 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5395 tree max_index
= NULL_TREE
;
5397 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5399 if (TYPE_DOMAIN (type
))
5400 max_index
= array_type_nelts (type
);
5402 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5405 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5406 Parameters are the same of reshape_init_r. */
5409 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5411 tree max_index
= NULL_TREE
;
5413 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5415 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5417 tree value
= d
->cur
->value
;
5418 if (!same_type_p (TREE_TYPE (value
), type
))
5420 if (complain
& tf_error
)
5421 error ("invalid type %qT as initializer for a vector of type %qT",
5422 TREE_TYPE (d
->cur
->value
), type
);
5423 value
= error_mark_node
;
5429 /* For a vector, we initialize it as an array of the appropriate size. */
5430 if (TREE_CODE (type
) == VECTOR_TYPE
)
5431 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5433 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5436 /* Subroutine of reshape_init_r, processes the initializers for classes
5437 or union. Parameters are the same of reshape_init_r. */
5440 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5441 tsubst_flags_t complain
)
5446 gcc_assert (CLASS_TYPE_P (type
));
5448 /* The initializer for a class is always a CONSTRUCTOR. */
5449 new_init
= build_constructor (init_list_type_node
, NULL
);
5450 field
= next_initializable_field (TYPE_FIELDS (type
));
5456 An initializer for an aggregate member that is an
5457 empty class shall have the form of an empty
5458 initializer-list {}. */
5459 if (!first_initializer_p
)
5461 if (complain
& tf_error
)
5462 error ("initializer for %qT must be brace-enclosed", type
);
5463 return error_mark_node
;
5468 /* Loop through the initializable fields, gathering initializers. */
5469 while (d
->cur
!= d
->end
)
5472 constructor_elt
*old_cur
= d
->cur
;
5474 /* Handle designated initializers, as an extension. */
5477 if (d
->cur
->index
== error_mark_node
)
5478 return error_mark_node
;
5480 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5481 /* We already reshaped this. */
5482 gcc_assert (d
->cur
->index
== field
);
5483 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5484 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5487 if (complain
& tf_error
)
5488 error ("%<[%E] =%> used in a GNU-style designated initializer"
5489 " for class %qT", d
->cur
->index
, type
);
5490 return error_mark_node
;
5493 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5495 if (complain
& tf_error
)
5496 error ("%qT has no non-static data member named %qD", type
,
5498 return error_mark_node
;
5502 /* If we processed all the member of the class, we are done. */
5506 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5507 /*first_initializer_p=*/false, complain
);
5508 if (field_init
== error_mark_node
)
5509 return error_mark_node
;
5511 if (d
->cur
== old_cur
&& d
->cur
->index
)
5513 /* This can happen with an invalid initializer for a flexible
5514 array member (c++/54441). */
5515 if (complain
& tf_error
)
5516 error ("invalid initializer for %q#D", field
);
5517 return error_mark_node
;
5520 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5524 When a union is initialized with a brace-enclosed
5525 initializer, the braces shall only contain an
5526 initializer for the first member of the union. */
5527 if (TREE_CODE (type
) == UNION_TYPE
)
5530 field
= next_initializable_field (DECL_CHAIN (field
));
5536 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5537 designators are not valid; either complain or return true to indicate
5538 that reshape_init_r should return error_mark_node. */
5541 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5545 if (complain
& tf_error
)
5546 error ("C99 designator %qE outside aggregate initializer",
5554 /* Subroutine of reshape_init, which processes a single initializer (part of
5555 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5556 iterator within the CONSTRUCTOR which points to the initializer to process.
5557 FIRST_INITIALIZER_P is true if this is the first initializer of the
5558 outermost CONSTRUCTOR node. */
5561 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5562 tsubst_flags_t complain
)
5564 tree init
= d
->cur
->value
;
5566 if (error_operand_p (init
))
5567 return error_mark_node
;
5569 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5570 && has_designator_problem (d
, complain
))
5571 return error_mark_node
;
5573 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5575 /* A complex type can be initialized from one or two initializers,
5576 but braces are not elided. */
5578 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5580 if (CONSTRUCTOR_NELTS (init
) > 2)
5582 if (complain
& tf_error
)
5583 error ("too many initializers for %qT", type
);
5585 return error_mark_node
;
5588 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5590 vec
<constructor_elt
, va_gc
> *v
= 0;
5591 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5592 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5593 if (has_designator_problem (d
, complain
))
5594 return error_mark_node
;
5596 init
= build_constructor (init_list_type_node
, v
);
5601 /* A non-aggregate type is always initialized with a single
5603 if (!CP_AGGREGATE_TYPE_P (type
))
5605 /* It is invalid to initialize a non-aggregate type with a
5606 brace-enclosed initializer before C++0x.
5607 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5608 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5609 a CONSTRUCTOR (with a record type). */
5610 if (TREE_CODE (init
) == CONSTRUCTOR
5611 /* Don't complain about a capture-init. */
5612 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5613 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5615 if (SCALAR_TYPE_P (type
))
5617 if (cxx_dialect
< cxx11
5618 /* Isn't value-initialization. */
5619 || CONSTRUCTOR_NELTS (init
) > 0)
5621 if (complain
& tf_error
)
5622 error ("braces around scalar initializer for type %qT",
5624 init
= error_mark_node
;
5628 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5635 /* "If T is a class type and the initializer list has a single element of
5636 type cv U, where U is T or a class derived from T, the object is
5637 initialized from that element." Even if T is an aggregate. */
5638 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5639 && first_initializer_p
5640 && d
->end
- d
->cur
== 1
5641 && reference_related_p (type
, TREE_TYPE (init
)))
5649 All implicit type conversions (clause _conv_) are considered when
5650 initializing the aggregate member with an initializer from an
5651 initializer-list. If the initializer can initialize a member,
5652 the member is initialized. Otherwise, if the member is itself a
5653 non-empty subaggregate, brace elision is assumed and the
5654 initializer is considered for the initialization of the first
5655 member of the subaggregate. */
5656 if (TREE_CODE (init
) != CONSTRUCTOR
5657 /* But don't try this for the first initializer, since that would be
5658 looking through the outermost braces; A a2 = { a1 }; is not a
5659 valid aggregate initialization. */
5660 && !first_initializer_p
5661 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5662 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5669 /* [dcl.init.string]
5671 A char array (whether plain char, signed char, or unsigned char)
5672 can be initialized by a string-literal (optionally enclosed in
5673 braces); a wchar_t array can be initialized by a wide
5674 string-literal (optionally enclosed in braces). */
5675 if (TREE_CODE (type
) == ARRAY_TYPE
5676 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5678 tree str_init
= init
;
5680 /* Strip one level of braces if and only if they enclose a single
5681 element (as allowed by [dcl.init.string]). */
5682 if (!first_initializer_p
5683 && TREE_CODE (str_init
) == CONSTRUCTOR
5684 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5686 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5689 /* If it's a string literal, then it's the initializer for the array
5690 as a whole. Otherwise, continue with normal initialization for
5691 array types (one value per array element). */
5692 if (TREE_CODE (str_init
) == STRING_CST
)
5694 if (has_designator_problem (d
, complain
))
5695 return error_mark_node
;
5701 /* The following cases are about aggregates. If we are not within a full
5702 initializer already, and there is not a CONSTRUCTOR, it means that there
5703 is a missing set of braces (that is, we are processing the case for
5704 which reshape_init exists). */
5705 if (!first_initializer_p
)
5707 if (TREE_CODE (init
) == CONSTRUCTOR
)
5709 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5710 /* There is no need to reshape pointer-to-member function
5711 initializers, as they are always constructed correctly
5712 by the front end. */
5714 else if (COMPOUND_LITERAL_P (init
))
5715 /* For a nested compound literal, there is no need to reshape since
5716 brace elision is not allowed. Even if we decided to allow it,
5717 we should add a call to reshape_init in finish_compound_literal,
5718 before calling digest_init, so changing this code would still
5719 not be necessary. */
5720 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5724 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5725 return reshape_init (type
, init
, complain
);
5729 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5733 /* Dispatch to specialized routines. */
5734 if (CLASS_TYPE_P (type
))
5735 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5736 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5737 return reshape_init_array (type
, d
, complain
);
5738 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5739 return reshape_init_vector (type
, d
, complain
);
5744 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5745 brace-enclosed aggregate initializer.
5747 INIT is the CONSTRUCTOR containing the list of initializers describing
5748 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5749 It may not presently match the shape of the TYPE; for example:
5751 struct S { int a; int b; };
5752 struct S a[] = { 1, 2, 3, 4 };
5754 Here INIT will hold a vector of four elements, rather than a
5755 vector of two elements, each itself a vector of two elements. This
5756 routine transforms INIT from the former form into the latter. The
5757 revised CONSTRUCTOR node is returned. */
5760 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5762 vec
<constructor_elt
, va_gc
> *v
;
5766 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5768 v
= CONSTRUCTOR_ELTS (init
);
5770 /* An empty constructor does not need reshaping, and it is always a valid
5772 if (vec_safe_is_empty (v
))
5775 /* Recurse on this CONSTRUCTOR. */
5777 d
.end
= d
.cur
+ v
->length ();
5779 new_init
= reshape_init_r (type
, &d
, true, complain
);
5780 if (new_init
== error_mark_node
)
5781 return error_mark_node
;
5783 /* Make sure all the element of the constructor were used. Otherwise,
5784 issue an error about exceeding initializers. */
5787 if (complain
& tf_error
)
5788 error ("too many initializers for %qT", type
);
5790 return error_mark_node
;
5796 /* Verify array initializer. Returns true if errors have been reported. */
5799 check_array_initializer (tree decl
, tree type
, tree init
)
5801 tree element_type
= TREE_TYPE (type
);
5803 /* The array type itself need not be complete, because the
5804 initializer may tell us how many elements are in the array.
5805 But, the elements of the array must be complete. */
5806 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5809 error ("elements of array %q#D have incomplete type", decl
);
5811 error ("elements of array %q#T have incomplete type", type
);
5814 /* A compound literal can't have variable size. */
5816 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5817 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5819 error ("variable-sized compound literal");
5825 /* Subroutine of check_initializer; args are passed down from that function.
5826 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5829 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5832 gcc_assert (stmts_are_full_exprs_p ());
5833 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5836 /* Verify INIT (the initializer for DECL), and record the
5837 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5838 grok_reference_init.
5840 If the return value is non-NULL, it is an expression that must be
5841 evaluated dynamically to initialize DECL. */
5844 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5846 tree type
= TREE_TYPE (decl
);
5847 tree init_code
= NULL
;
5850 /* Things that are going to be initialized need to have complete
5852 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5854 if (DECL_HAS_VALUE_EXPR_P (decl
))
5856 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5857 it doesn't have storage to be initialized. */
5858 gcc_assert (init
== NULL_TREE
);
5862 if (type
== error_mark_node
)
5863 /* We will have already complained. */
5866 if (TREE_CODE (type
) == ARRAY_TYPE
)
5868 if (check_array_initializer (decl
, type
, init
))
5871 else if (!COMPLETE_TYPE_P (type
))
5873 error ("%q#D has incomplete type", decl
);
5874 TREE_TYPE (decl
) = error_mark_node
;
5878 /* There is no way to make a variable-sized class type in GNU C++. */
5879 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5881 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5883 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5884 if (SCALAR_TYPE_P (type
))
5888 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5889 init
= build_zero_init (type
, NULL_TREE
, false);
5891 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5893 error ("scalar object %qD requires one element in initializer",
5895 TREE_TYPE (decl
) = error_mark_node
;
5901 if (TREE_CODE (decl
) == CONST_DECL
)
5903 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5905 DECL_INITIAL (decl
) = init
;
5907 gcc_assert (init
!= NULL_TREE
);
5910 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5912 else if (init
|| type_build_ctor_call (type
)
5913 || TREE_CODE (type
) == REFERENCE_TYPE
)
5915 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5917 init
= grok_reference_init (decl
, type
, init
, flags
);
5918 flags
|= LOOKUP_ALREADY_DIGESTED
;
5921 check_for_uninitialized_const_var (decl
);
5922 /* Do not reshape constructors of vectors (they don't need to be
5924 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5926 if (is_std_init_list (type
))
5928 init
= perform_implicit_conversion (type
, init
,
5929 tf_warning_or_error
);
5930 flags
|= LOOKUP_ALREADY_DIGESTED
;
5932 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5934 /* Don't reshape if the class has constructors. */
5935 if (cxx_dialect
== cxx98
)
5936 error ("in C++98 %qD must be initialized by constructor, "
5940 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5942 error ("opaque vector types cannot be initialized");
5943 init
= error_mark_node
;
5947 init
= reshape_init (type
, init
, tf_warning_or_error
);
5948 flags
|= LOOKUP_NO_NARROWING
;
5951 else if (TREE_CODE (init
) == TREE_LIST
5952 && TREE_TYPE (init
) != unknown_type_node
5953 && !MAYBE_CLASS_TYPE_P (type
))
5955 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5957 /* We get here with code like `int a (2);' */
5958 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5959 tf_warning_or_error
);
5962 /* If DECL has an array type without a specific bound, deduce the
5963 array size from the initializer. */
5964 maybe_deduce_size_from_array_init (decl
, init
);
5965 type
= TREE_TYPE (decl
);
5966 if (type
== error_mark_node
)
5969 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5970 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5971 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5972 && CP_AGGREGATE_TYPE_P (type
)
5973 && (CLASS_TYPE_P (type
)
5974 || !TYPE_NEEDS_CONSTRUCTING (type
)
5975 || type_has_extended_temps (type
))))
5977 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5979 /* A constructor call is a non-trivial initializer even if
5980 it isn't explicitly written. */
5981 if (TREE_SIDE_EFFECTS (init_code
))
5982 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5984 /* If this is a constexpr initializer, expand_default_init will
5985 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5986 case, pull the initializer back out and pass it down into
5987 store_init_value. */
5988 while (TREE_CODE (init_code
) == EXPR_STMT
5989 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5990 init_code
= TREE_OPERAND (init_code
, 0);
5991 if (TREE_CODE (init_code
) == INIT_EXPR
)
5993 init
= TREE_OPERAND (init_code
, 1);
5994 init_code
= NULL_TREE
;
5995 /* Don't call digest_init; it's unnecessary and will complain
5996 about aggregate initialization of non-aggregate classes. */
5997 flags
|= LOOKUP_ALREADY_DIGESTED
;
5999 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
6001 /* Declared constexpr, but no suitable initializer; massage
6002 init appropriately so we can pass it into store_init_value
6004 if (CLASS_TYPE_P (type
)
6005 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
6007 init
= build_functional_cast (type
, init
, tf_none
);
6008 if (TREE_CODE (init
) == TARGET_EXPR
)
6009 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
6011 init_code
= NULL_TREE
;
6017 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6019 /* In aggregate initialization of a variable, each element
6020 initialization is a full-expression because there is no
6021 enclosing expression. */
6022 gcc_assert (stmts_are_full_exprs_p ());
6024 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6026 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6027 && DECL_INITIAL (decl
)
6028 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6029 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6030 warning (0, "array %qD initialized by parenthesized string literal %qE",
6031 decl
, DECL_INITIAL (decl
));
6037 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6038 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6039 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6040 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6043 check_for_uninitialized_const_var (decl
);
6046 if (init
&& init
!= error_mark_node
)
6047 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6051 /* We might have set these in cp_finish_decl. */
6052 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6053 TREE_CONSTANT (decl
) = false;
6056 if (init_code
&& DECL_IN_AGGR_P (decl
))
6058 static int explained
= 0;
6060 if (cxx_dialect
< cxx11
)
6061 error ("initializer invalid for static member with constructor");
6063 error ("non-constant in-class initialization invalid for static "
6064 "member %qD", decl
);
6067 inform (input_location
,
6068 "(an out of class initialization is required)");
6077 /* If DECL is not a local variable, give it RTL. */
6080 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6082 int toplev
= toplevel_bindings_p ();
6085 /* Set the DECL_ASSEMBLER_NAME for the object. */
6088 /* The `register' keyword, when used together with an
6089 asm-specification, indicates that the variable should be
6090 placed in a particular register. */
6091 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6093 set_user_assembler_name (decl
, asmspec
);
6094 DECL_HARD_REGISTER (decl
) = 1;
6098 if (TREE_CODE (decl
) == FUNCTION_DECL
6099 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6100 set_builtin_user_assembler_name (decl
, asmspec
);
6101 set_user_assembler_name (decl
, asmspec
);
6105 /* Handle non-variables up front. */
6108 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6112 /* If we see a class member here, it should be a static data
6114 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6116 gcc_assert (TREE_STATIC (decl
));
6117 /* An in-class declaration of a static data member should be
6118 external; it is only a declaration, and not a definition. */
6119 if (init
== NULL_TREE
)
6120 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6123 /* We don't create any RTL for local variables. */
6124 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6127 /* We defer emission of local statics until the corresponding
6128 DECL_EXPR is expanded. */
6129 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6131 /* Defer template instantiations. */
6132 if (DECL_LANG_SPECIFIC (decl
)
6133 && DECL_IMPLICIT_INSTANTIATION (decl
))
6136 /* If we're not deferring, go ahead and assemble the variable. */
6138 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6141 /* walk_tree helper for wrap_temporary_cleanups, below. */
6144 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6146 /* Stop at types or full-expression boundaries. */
6147 if (TYPE_P (*stmt_p
)
6148 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6154 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6156 tree guard
= (tree
)data
;
6157 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6159 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6160 /* Tell honor_protect_cleanup_actions to handle this as a separate
6162 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6164 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6170 /* We're initializing a local variable which has a cleanup GUARD. If there
6171 are any temporaries used in the initializer INIT of this variable, we
6172 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6173 variable will be cleaned up properly if one of them throws.
6175 Unfortunately, there's no way to express this properly in terms of
6176 nesting, as the regions for the temporaries overlap the region for the
6177 variable itself; if there are two temporaries, the variable needs to be
6178 the first thing destroyed if either of them throws. However, we only
6179 want to run the variable's cleanup if it actually got constructed. So
6180 we need to guard the temporary cleanups with the variable's cleanup if
6181 they are run on the normal path, but not if they are run on the
6182 exceptional path. We implement this by telling
6183 honor_protect_cleanup_actions to strip the variable cleanup from the
6184 exceptional path. */
6187 wrap_temporary_cleanups (tree init
, tree guard
)
6189 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6192 /* Generate code to initialize DECL (a local variable). */
6195 initialize_local_var (tree decl
, tree init
)
6197 tree type
= TREE_TYPE (decl
);
6201 gcc_assert (VAR_P (decl
)
6202 || TREE_CODE (decl
) == RESULT_DECL
);
6203 gcc_assert (!TREE_STATIC (decl
));
6205 if (DECL_SIZE (decl
) == NULL_TREE
)
6207 /* If we used it already as memory, it must stay in memory. */
6208 DECL_INITIAL (decl
) = NULL_TREE
;
6209 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6213 if (type
== error_mark_node
)
6216 /* Compute and store the initial value. */
6217 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6218 if (TREE_USED (type
))
6219 DECL_READ_P (decl
) = 1;
6221 /* Generate a cleanup, if necessary. */
6222 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6224 /* Perform the initialization. */
6227 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6228 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6229 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6231 /* Stick simple initializers in DECL_INITIAL so that
6232 -Wno-init-self works (c++/34772). */
6233 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6234 DECL_INITIAL (decl
) = rinit
;
6236 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6240 warning_at (DECL_SOURCE_LOCATION (decl
),
6242 "reference %qD is initialized with itself", decl
);
6247 int saved_stmts_are_full_exprs_p
;
6249 /* If we're only initializing a single object, guard the
6250 destructors of any temporaries used in its initializer with
6251 its destructor. This isn't right for arrays because each
6252 element initialization is a full-expression. */
6253 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6254 wrap_temporary_cleanups (init
, cleanup
);
6256 gcc_assert (building_stmt_list_p ());
6257 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6258 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6259 finish_expr_stmt (init
);
6260 current_stmt_tree ()->stmts_are_full_exprs_p
=
6261 saved_stmts_are_full_exprs_p
;
6265 /* Set this to 0 so we can tell whether an aggregate which was
6266 initialized was ever used. Don't do this if it has a
6267 destructor, so we don't complain about the 'resource
6268 allocation is initialization' idiom. Now set
6269 attribute((unused)) on types so decls of that type will be
6270 marked used. (see TREE_USED, above.) */
6271 if (TYPE_NEEDS_CONSTRUCTING (type
)
6273 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6274 && DECL_NAME (decl
))
6275 TREE_USED (decl
) = 0;
6276 else if (already_used
)
6277 TREE_USED (decl
) = 1;
6280 finish_decl_cleanup (decl
, cleanup
);
6283 /* DECL is a VAR_DECL for a compiler-generated variable with static
6284 storage duration (like a virtual table) whose initializer is a
6285 compile-time constant. Initialize the variable and provide it to the
6289 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6292 gcc_assert (DECL_ARTIFICIAL (decl
));
6293 init
= build_constructor (TREE_TYPE (decl
), v
);
6294 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6295 DECL_INITIAL (decl
) = init
;
6296 DECL_INITIALIZED_P (decl
) = 1;
6297 determine_visibility (decl
);
6298 layout_var_decl (decl
);
6299 maybe_commonize_var (decl
);
6300 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6303 /* INIT is the initializer for a variable, as represented by the
6304 parser. Returns true iff INIT is type-dependent. */
6307 type_dependent_init_p (tree init
)
6309 if (TREE_CODE (init
) == TREE_LIST
)
6310 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6311 return any_type_dependent_elements_p (init
);
6312 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6313 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6315 vec
<constructor_elt
, va_gc
> *elts
;
6319 elts
= CONSTRUCTOR_ELTS (init
);
6320 nelts
= vec_safe_length (elts
);
6321 for (i
= 0; i
< nelts
; ++i
)
6322 if (type_dependent_init_p ((*elts
)[i
].value
))
6326 /* It must be a simple expression, e.g., int i = 3; */
6327 return type_dependent_expression_p (init
);
6332 /* INIT is the initializer for a variable, as represented by the
6333 parser. Returns true iff INIT is value-dependent. */
6336 value_dependent_init_p (tree init
)
6338 if (TREE_CODE (init
) == TREE_LIST
)
6339 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6340 return any_value_dependent_elements_p (init
);
6341 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6342 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6344 vec
<constructor_elt
, va_gc
> *elts
;
6348 elts
= CONSTRUCTOR_ELTS (init
);
6349 nelts
= vec_safe_length (elts
);
6350 for (i
= 0; i
< nelts
; ++i
)
6351 if (value_dependent_init_p ((*elts
)[i
].value
))
6355 /* It must be a simple expression, e.g., int i = 3; */
6356 return value_dependent_expression_p (init
);
6361 /* Finish processing of a declaration;
6362 install its line number and initial value.
6363 If the length of an array type is not known before,
6364 it must be determined now, from the initial value, or it is an error.
6366 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6367 true, then INIT is an integral constant expression.
6369 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6370 if the (init) syntax was used. */
6373 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6374 tree asmspec_tree
, int flags
)
6377 vec
<tree
, va_gc
> *cleanups
= NULL
;
6378 const char *asmspec
= NULL
;
6379 int was_readonly
= 0;
6380 bool var_definition_p
= false;
6383 if (decl
== error_mark_node
)
6388 error ("assignment (not initialization) in declaration");
6392 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6393 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6394 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6396 type
= TREE_TYPE (decl
);
6397 if (type
== error_mark_node
)
6400 /* If a name was specified, get the string. */
6401 if (at_namespace_scope_p ())
6402 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6403 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6404 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6406 if (current_class_type
6407 && CP_DECL_CONTEXT (decl
) == current_class_type
6408 && TYPE_BEING_DEFINED (current_class_type
)
6409 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6410 && (DECL_INITIAL (decl
) || init
))
6411 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6413 if (TREE_CODE (decl
) != FUNCTION_DECL
6414 && (auto_node
= type_uses_auto (type
)))
6417 if (init
== NULL_TREE
)
6419 if (DECL_LANG_SPECIFIC (decl
)
6420 && DECL_TEMPLATE_INSTANTIATION (decl
)
6421 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6423 /* init is null because we're deferring instantiating the
6424 initializer until we need it. Well, we need it now. */
6425 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6429 error ("declaration of %q#D has no initializer", decl
);
6430 TREE_TYPE (decl
) = error_mark_node
;
6434 if (TREE_CODE (d_init
) == TREE_LIST
)
6435 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6436 tf_warning_or_error
);
6437 d_init
= resolve_nondeduced_context (d_init
);
6438 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6440 if (type
== error_mark_node
)
6442 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6445 if (!ensure_literal_type_for_constexpr_object (decl
))
6446 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6449 && DECL_CLASS_SCOPE_P (decl
)
6450 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6451 check_static_variable_definition (decl
, type
);
6453 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6456 if (init
== ridpointers
[(int)RID_DELETE
])
6458 /* FIXME check this is 1st decl. */
6459 DECL_DELETED_FN (decl
) = 1;
6460 DECL_DECLARED_INLINE_P (decl
) = 1;
6461 DECL_INITIAL (decl
) = error_mark_node
;
6462 FOR_EACH_CLONE (clone
, decl
)
6464 DECL_DELETED_FN (clone
) = 1;
6465 DECL_DECLARED_INLINE_P (clone
) = 1;
6466 DECL_INITIAL (clone
) = error_mark_node
;
6470 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6472 if (defaultable_fn_check (decl
))
6473 DECL_DEFAULTED_FN (decl
) = 1;
6475 DECL_INITIAL (decl
) = NULL_TREE
;
6479 if (init
&& VAR_P (decl
))
6481 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6482 /* If DECL is a reference, then we want to know whether init is a
6483 reference constant; init_const_expr_p as passed tells us whether
6484 it's an rvalue constant. */
6485 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6486 init_const_expr_p
= potential_constant_expression (init
);
6487 if (init_const_expr_p
)
6489 /* Set these flags now for templates. We'll update the flags in
6490 store_init_value for instantiations. */
6491 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6492 if (decl_maybe_constant_var_p (decl
))
6493 TREE_CONSTANT (decl
) = 1;
6497 if (processing_template_decl
)
6499 bool type_dependent_p
;
6501 /* Add this declaration to the statement-tree. */
6502 if (at_function_scope_p ())
6503 add_decl_expr (decl
);
6505 type_dependent_p
= dependent_type_p (type
);
6507 if (check_for_bare_parameter_packs (init
))
6510 DECL_INITIAL (decl
) = NULL_TREE
;
6513 /* Generally, initializers in templates are expanded when the
6514 template is instantiated. But, if DECL is a variable constant
6515 then it can be used in future constant expressions, so its value
6516 must be available. */
6518 if (!VAR_P (decl
) || dependent_type_p (type
))
6519 /* We can't do anything if the decl has dependent type. */;
6521 && init_const_expr_p
6522 && !type_dependent_p
6523 && TREE_CODE (type
) != REFERENCE_TYPE
6524 && decl_maybe_constant_var_p (decl
)
6525 && !type_dependent_init_p (init
)
6526 && !value_dependent_init_p (init
))
6528 /* This variable seems to be a non-dependent constant, so process
6529 its initializer. If check_initializer returns non-null the
6530 initialization wasn't constant after all. */
6532 cleanups
= make_tree_vector ();
6533 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6534 if (init_code
== NULL_TREE
)
6536 release_tree_vector (cleanups
);
6538 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6540 /* Deduce array size even if the initializer is dependent. */
6541 maybe_deduce_size_from_array_init (decl
, init
);
6542 /* And complain about multiple initializers. */
6543 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6544 && !MAYBE_CLASS_TYPE_P (type
))
6545 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6546 tf_warning_or_error
);
6550 DECL_INITIAL (decl
) = init
;
6554 /* Just store non-static data member initializers for later. */
6555 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6556 DECL_INITIAL (decl
) = init
;
6558 /* Take care of TYPE_DECLs up front. */
6559 if (TREE_CODE (decl
) == TYPE_DECL
)
6561 if (type
!= error_mark_node
6562 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6564 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6565 warning (0, "shadowing previous type declaration of %q#D", decl
);
6566 set_identifier_type_value (DECL_NAME (decl
), decl
);
6569 /* If we have installed this as the canonical typedef for this
6570 type, and that type has not been defined yet, delay emitting
6571 the debug information for it, as we will emit it later. */
6572 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6573 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6574 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6576 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6581 /* A reference will be modified here, as it is initialized. */
6582 if (! DECL_EXTERNAL (decl
)
6583 && TREE_READONLY (decl
)
6584 && TREE_CODE (type
) == REFERENCE_TYPE
)
6587 TREE_READONLY (decl
) = 0;
6592 /* If this is a local variable that will need a mangled name,
6593 register it now. We must do this before processing the
6594 initializer for the variable, since the initialization might
6595 require a guard variable, and since the mangled name of the
6596 guard variable will depend on the mangled name of this
6598 if (DECL_FUNCTION_SCOPE_P (decl
)
6599 && TREE_STATIC (decl
)
6600 && !DECL_ARTIFICIAL (decl
))
6602 push_local_name (decl
);
6603 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6604 || DECL_DESTRUCTOR_P (current_function_decl
))
6605 /* Normally local_decls is populated during GIMPLE lowering,
6606 but [cd]tors are never actually compiled directly. We need
6607 to put statics on the list so we can deal with the label
6608 address extension. FIXME. */
6609 add_local_decl (cfun
, decl
);
6612 /* Convert the initializer to the type of DECL, if we have not
6613 already initialized DECL. */
6614 if (!DECL_INITIALIZED_P (decl
)
6615 /* If !DECL_EXTERNAL then DECL is being defined. In the
6616 case of a static data member initialized inside the
6617 class-specifier, there can be an initializer even if DECL
6618 is *not* defined. */
6619 && (!DECL_EXTERNAL (decl
) || init
))
6621 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6624 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6625 /* Allow libjava/prims.cc define primitive classes. */
6626 if (init
!= NULL_TREE
6627 || jclass
== NULL_TREE
6628 || TREE_CODE (jclass
) != TYPE_DECL
6629 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6630 || !same_type_ignoring_top_level_qualifiers_p
6631 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6632 error ("Java object %qD not allocated with %<new%>", decl
);
6635 cleanups
= make_tree_vector ();
6636 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6642 The memory occupied by any object of static storage
6643 duration is zero-initialized at program startup before
6644 any other initialization takes place.
6646 We cannot create an appropriate initializer until after
6647 the type of DECL is finalized. If DECL_INITIAL is set,
6648 then the DECL is statically initialized, and any
6649 necessary zero-initialization has already been performed. */
6650 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6651 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6652 /*nelts=*/NULL_TREE
,
6653 /*static_storage_p=*/true);
6654 /* Remember that the initialization for this variable has
6656 DECL_INITIALIZED_P (decl
) = 1;
6657 /* This declaration is the definition of this variable,
6658 unless we are initializing a static data member within
6659 the class specifier. */
6660 if (!DECL_EXTERNAL (decl
))
6661 var_definition_p
= true;
6663 /* If the variable has an array type, lay out the type, even if
6664 there is no initializer. It is valid to index through the
6665 array, and we must get TYPE_ALIGN set correctly on the array
6667 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6670 if (TREE_STATIC (decl
)
6671 && !at_function_scope_p ()
6672 && current_function_decl
== NULL
)
6673 /* So decl is a global variable or a static member of a
6674 non local class. Record the types it uses
6675 so that we can decide later to emit debug info for them. */
6676 record_types_used_by_current_var_decl (decl
);
6678 else if (TREE_CODE (decl
) == FIELD_DECL
6679 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6680 error ("non-static data member %qD has Java class type", decl
);
6682 /* Add this declaration to the statement-tree. This needs to happen
6683 after the call to check_initializer so that the DECL_EXPR for a
6684 reference temp is added before the DECL_EXPR for the reference itself. */
6685 if (DECL_FUNCTION_SCOPE_P (decl
))
6687 /* If we're building a variable sized type, and we might be
6688 reachable other than via the top of the current binding
6689 level, then create a new BIND_EXPR so that we deallocate
6690 the object at the right time. */
6693 && !TREE_CONSTANT (DECL_SIZE (decl
))
6694 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6697 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6698 TREE_SIDE_EFFECTS (bind
) = 1;
6700 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6702 add_decl_expr (decl
);
6705 /* Let the middle end know about variables and functions -- but not
6706 static data members in uninstantiated class templates. */
6707 if (VAR_OR_FUNCTION_DECL_P (decl
))
6711 layout_var_decl (decl
);
6712 maybe_commonize_var (decl
);
6715 /* This needs to happen after the linkage is set. */
6716 determine_visibility (decl
);
6718 if (var_definition_p
&& TREE_STATIC (decl
))
6720 /* If a TREE_READONLY variable needs initialization
6721 at runtime, it is no longer readonly and we need to
6722 avoid MEM_READONLY_P being set on RTL created for it. */
6725 if (TREE_READONLY (decl
))
6726 TREE_READONLY (decl
) = 0;
6729 else if (was_readonly
)
6730 TREE_READONLY (decl
) = 1;
6732 /* Likewise if it needs destruction. */
6733 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6734 TREE_READONLY (decl
) = 0;
6737 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6739 /* Check for abstractness of the type. Notice that there is no
6740 need to strip array types here since the check for those types
6741 is already done within create_array_type_for_decl. */
6742 abstract_virtuals_error (decl
, type
);
6744 if (TREE_TYPE (decl
) == error_mark_node
)
6745 /* No initialization required. */
6747 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6751 if (init
== ridpointers
[(int)RID_DEFAULT
])
6753 /* An out-of-class default definition is defined at
6754 the point where it is explicitly defaulted. */
6755 if (DECL_DELETED_FN (decl
))
6756 maybe_explain_implicit_delete (decl
);
6757 else if (DECL_INITIAL (decl
) == error_mark_node
)
6758 synthesize_method (decl
);
6761 error ("function %q#D is initialized like a variable", decl
);
6763 /* else no initialization required. */
6765 else if (DECL_EXTERNAL (decl
)
6766 && ! (DECL_LANG_SPECIFIC (decl
)
6767 && DECL_NOT_REALLY_EXTERN (decl
)))
6770 DECL_INITIAL (decl
) = init
;
6772 /* A variable definition. */
6773 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6774 /* Initialize the local variable. */
6775 initialize_local_var (decl
, init
);
6777 /* If a variable is defined, and then a subsequent
6778 definition with external linkage is encountered, we will
6779 get here twice for the same variable. We want to avoid
6780 calling expand_static_init more than once. For variables
6781 that are not static data members, we can call
6782 expand_static_init only when we actually process the
6783 initializer. It is not legal to redeclare a static data
6784 member, so this issue does not arise in that case. */
6785 else if (var_definition_p
&& TREE_STATIC (decl
))
6786 expand_static_init (decl
, init
);
6789 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6790 reference, insert it in the statement-tree now. */
6794 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6795 push_cleanup (decl
, t
, false);
6796 release_tree_vector (cleanups
);
6800 TREE_READONLY (decl
) = 1;
6802 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6805 /* Returns a declaration for a VAR_DECL as if:
6807 extern "C" TYPE NAME;
6809 had been seen. Used to create compiler-generated global
6813 declare_global_var (tree name
, tree type
)
6817 push_to_top_level ();
6818 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6819 TREE_PUBLIC (decl
) = 1;
6820 DECL_EXTERNAL (decl
) = 1;
6821 DECL_ARTIFICIAL (decl
) = 1;
6822 /* If the user has explicitly declared this variable (perhaps
6823 because the code we are compiling is part of a low-level runtime
6824 library), then it is possible that our declaration will be merged
6825 with theirs by pushdecl. */
6826 decl
= pushdecl (decl
);
6827 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6828 pop_from_top_level ();
6833 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6834 if "__cxa_atexit" is not being used) corresponding to the function
6835 to be called when the program exits. */
6838 get_atexit_fn_ptr_type (void)
6842 if (!atexit_fn_ptr_type_node
)
6845 if (flag_use_cxa_atexit
6846 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6847 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6848 arg_type
= ptr_type_node
;
6850 /* The parameter to "atexit" is "void (*)(void)". */
6851 arg_type
= NULL_TREE
;
6853 fn_type
= build_function_type_list (void_type_node
,
6854 arg_type
, NULL_TREE
);
6855 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6858 return atexit_fn_ptr_type_node
;
6861 /* Returns a pointer to the `atexit' function. Note that if
6862 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6863 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6866 get_atexit_node (void)
6872 bool use_aeabi_atexit
;
6877 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6879 /* The declaration for `__cxa_atexit' is:
6881 int __cxa_atexit (void (*)(void *), void *, void *)
6883 We build up the argument types and then the function type
6885 tree argtype0
, argtype1
, argtype2
;
6887 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6888 /* First, build the pointer-to-function type for the first
6890 fn_ptr_type
= get_atexit_fn_ptr_type ();
6891 /* Then, build the rest of the argument types. */
6892 argtype2
= ptr_type_node
;
6893 if (use_aeabi_atexit
)
6895 argtype1
= fn_ptr_type
;
6896 argtype0
= ptr_type_node
;
6900 argtype1
= ptr_type_node
;
6901 argtype0
= fn_ptr_type
;
6903 /* And the final __cxa_atexit type. */
6904 fn_type
= build_function_type_list (integer_type_node
,
6905 argtype0
, argtype1
, argtype2
,
6907 if (use_aeabi_atexit
)
6908 name
= "__aeabi_atexit";
6910 name
= "__cxa_atexit";
6914 /* The declaration for `atexit' is:
6916 int atexit (void (*)());
6918 We build up the argument types and then the function type
6920 fn_ptr_type
= get_atexit_fn_ptr_type ();
6921 /* Build the final atexit type. */
6922 fn_type
= build_function_type_list (integer_type_node
,
6923 fn_ptr_type
, NULL_TREE
);
6927 /* Now, build the function declaration. */
6928 push_lang_context (lang_name_c
);
6929 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6930 mark_used (atexit_fndecl
);
6931 pop_lang_context ();
6932 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6937 /* Like get_atexit_node, but for thread-local cleanups. */
6940 get_thread_atexit_node (void)
6942 /* The declaration for `__cxa_thread_atexit' is:
6944 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6945 tree fn_type
= build_function_type_list (integer_type_node
,
6946 get_atexit_fn_ptr_type (),
6947 ptr_type_node
, ptr_type_node
,
6950 /* Now, build the function declaration. */
6951 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6952 ECF_LEAF
| ECF_NOTHROW
);
6953 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6956 /* Returns the __dso_handle VAR_DECL. */
6959 get_dso_handle_node (void)
6961 if (dso_handle_node
)
6962 return dso_handle_node
;
6964 /* Declare the variable. */
6965 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6968 #ifdef HAVE_GAS_HIDDEN
6969 if (dso_handle_node
!= error_mark_node
)
6971 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6972 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6976 return dso_handle_node
;
6979 /* Begin a new function with internal linkage whose job will be simply
6980 to destroy some particular variable. */
6982 static GTY(()) int start_cleanup_cnt
;
6985 start_cleanup_fn (void)
6990 bool use_cxa_atexit
= flag_use_cxa_atexit
6991 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6993 push_to_top_level ();
6995 /* No need to mangle this. */
6996 push_lang_context (lang_name_c
);
6998 /* Build the name of the function. */
6999 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
7000 /* Build the function declaration. */
7001 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
7002 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
7003 /* It's a function with internal linkage, generated by the
7005 TREE_PUBLIC (fndecl
) = 0;
7006 DECL_ARTIFICIAL (fndecl
) = 1;
7007 /* Make the function `inline' so that it is only emitted if it is
7008 actually needed. It is unlikely that it will be inlined, since
7009 it is only called via a function pointer, but we avoid unnecessary
7010 emissions this way. */
7011 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7012 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7013 /* Build the parameter. */
7018 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7019 DECL_CONTEXT (parmdecl
) = fndecl
;
7020 TREE_USED (parmdecl
) = 1;
7021 DECL_READ_P (parmdecl
) = 1;
7022 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7026 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7028 pop_lang_context ();
7030 return current_function_decl
;
7033 /* Finish the cleanup function begun by start_cleanup_fn. */
7036 end_cleanup_fn (void)
7038 expand_or_defer_fn (finish_function (0));
7040 pop_from_top_level ();
7043 /* Generate code to handle the destruction of DECL, an object with
7044 static storage duration. */
7047 register_dtor_fn (tree decl
)
7054 bool ob_parm
, dso_parm
, use_dtor
;
7055 tree arg0
, arg1
, arg2
;
7058 type
= TREE_TYPE (decl
);
7059 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7062 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7063 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7064 destructor to "__cxa_atexit"; we don't have to build a temporary
7065 function to do the cleanup. */
7066 dso_parm
= (flag_use_cxa_atexit
7067 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7068 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7069 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7074 /* Find the destructor. */
7075 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7076 gcc_assert (idx
>= 0);
7077 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7078 /* Make sure it is accessible. */
7079 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7080 tf_warning_or_error
);
7084 /* Call build_cleanup before we enter the anonymous function so
7085 that any access checks will be done relative to the current
7086 scope, rather than the scope of the anonymous function. */
7087 build_cleanup (decl
);
7089 /* Now start the function. */
7090 cleanup
= start_cleanup_fn ();
7092 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7093 to the original function, rather than the anonymous one. That
7094 will make the back end think that nested functions are in use,
7095 which causes confusion. */
7096 push_deferring_access_checks (dk_no_check
);
7097 fcall
= build_cleanup (decl
);
7098 pop_deferring_access_checks ();
7100 /* Create the body of the anonymous function. */
7101 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7102 finish_expr_stmt (fcall
);
7103 finish_compound_stmt (compound_stmt
);
7107 /* Call atexit with the cleanup function. */
7108 mark_used (cleanup
);
7109 cleanup
= build_address (cleanup
);
7111 if (DECL_THREAD_LOCAL_P (decl
))
7112 atex_node
= get_thread_atexit_node ();
7114 atex_node
= get_atexit_node ();
7118 /* We must convert CLEANUP to the type that "__cxa_atexit"
7120 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7121 /* "__cxa_atexit" will pass the address of DECL to the
7122 cleanup function. */
7124 addr
= build_address (decl
);
7125 /* The declared type of the parameter to "__cxa_atexit" is
7126 "void *". For plain "T*", we could just let the
7127 machinery in cp_build_function_call convert it -- but if the
7128 type is "cv-qualified T *", then we need to convert it
7129 before passing it in, to avoid spurious errors. */
7130 addr
= build_nop (ptr_type_node
, addr
);
7133 /* Since the cleanup functions we build ignore the address
7134 they're given, there's no reason to pass the actual address
7135 in, and, in general, it's cheaper to pass NULL than any
7137 addr
= null_pointer_node
;
7140 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7141 tf_warning_or_error
);
7143 /* Just pass NULL to the dso handle parm if we don't actually
7144 have a DSO handle on this target. */
7145 arg2
= null_pointer_node
;
7151 if (!DECL_THREAD_LOCAL_P (decl
)
7152 && targetm
.cxx
.use_aeabi_atexit ())
7168 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7169 arg0
, arg1
, arg2
, NULL_TREE
);
7172 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7173 is its initializer. Generate code to handle the construction
7174 and destruction of DECL. */
7177 expand_static_init (tree decl
, tree init
)
7179 gcc_assert (VAR_P (decl
));
7180 gcc_assert (TREE_STATIC (decl
));
7182 /* Some variables require no dynamic initialization. */
7184 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7186 /* Make sure the destructor is callable. */
7187 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7191 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7192 && !DECL_FUNCTION_SCOPE_P (decl
))
7195 error ("non-local variable %qD declared %<__thread%> "
7196 "needs dynamic initialization", decl
);
7198 error ("non-local variable %qD declared %<__thread%> "
7199 "has a non-trivial destructor", decl
);
7200 static bool informed
;
7203 inform (DECL_SOURCE_LOCATION (decl
),
7204 "C++11 %<thread_local%> allows dynamic initialization "
7211 if (DECL_FUNCTION_SCOPE_P (decl
))
7213 /* Emit code to perform this initialization but once. */
7214 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7215 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7216 tree guard
, guard_addr
;
7218 /* We don't need thread-safety code for thread-local vars. */
7219 bool thread_guard
= (flag_threadsafe_statics
7220 && !DECL_THREAD_LOCAL_P (decl
));
7222 /* Emit code to perform this initialization but once. This code
7225 static <type> guard;
7226 if (!__atomic_load (guard.first_byte)) {
7227 if (__cxa_guard_acquire (&guard)) {
7230 // Do initialization.
7231 flag = true; __cxa_guard_release (&guard);
7232 // Register variable for destruction at end of program.
7234 if (!flag) __cxa_guard_abort (&guard);
7238 Note that the `flag' variable is only set to 1 *after* the
7239 initialization is complete. This ensures that an exception,
7240 thrown during the construction, will cause the variable to
7241 reinitialized when we pass through this code again, as per:
7245 If the initialization exits by throwing an exception, the
7246 initialization is not complete, so it will be tried again
7247 the next time control enters the declaration.
7249 This process should be thread-safe, too; multiple threads
7250 should not be able to initialize the variable more than
7253 /* Create the guard variable. */
7254 guard
= get_guard (decl
);
7256 /* Begin the conditional initialization. */
7257 if_stmt
= begin_if_stmt ();
7259 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7260 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7264 tree vfntype
= NULL_TREE
;
7265 tree acquire_name
, release_name
, abort_name
;
7266 tree acquire_fn
, release_fn
, abort_fn
;
7267 guard_addr
= build_address (guard
);
7269 acquire_name
= get_identifier ("__cxa_guard_acquire");
7270 release_name
= get_identifier ("__cxa_guard_release");
7271 abort_name
= get_identifier ("__cxa_guard_abort");
7272 acquire_fn
= identifier_global_value (acquire_name
);
7273 release_fn
= identifier_global_value (release_name
);
7274 abort_fn
= identifier_global_value (abort_name
);
7276 acquire_fn
= push_library_fn
7277 (acquire_name
, build_function_type_list (integer_type_node
,
7278 TREE_TYPE (guard_addr
),
7280 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7281 if (!release_fn
|| !abort_fn
)
7282 vfntype
= build_function_type_list (void_type_node
,
7283 TREE_TYPE (guard_addr
),
7286 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7287 ECF_NOTHROW
| ECF_LEAF
);
7289 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7290 ECF_NOTHROW
| ECF_LEAF
);
7292 inner_if_stmt
= begin_if_stmt ();
7293 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7296 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7297 begin
= get_target_expr (boolean_false_node
);
7298 flag
= TARGET_EXPR_SLOT (begin
);
7300 TARGET_EXPR_CLEANUP (begin
)
7301 = build3 (COND_EXPR
, void_type_node
, flag
,
7303 build_call_n (abort_fn
, 1, guard_addr
));
7304 CLEANUP_EH_ONLY (begin
) = 1;
7306 /* Do the initialization itself. */
7307 init
= add_stmt_to_compound (begin
, init
);
7308 init
= add_stmt_to_compound
7309 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7310 init
= add_stmt_to_compound
7311 (init
, build_call_n (release_fn
, 1, guard_addr
));
7314 init
= add_stmt_to_compound (init
, set_guard (guard
));
7316 /* Use atexit to register a function for destroying this static
7318 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7320 finish_expr_stmt (init
);
7324 finish_compound_stmt (inner_then_clause
);
7325 finish_then_clause (inner_if_stmt
);
7326 finish_if_stmt (inner_if_stmt
);
7329 finish_compound_stmt (then_clause
);
7330 finish_then_clause (if_stmt
);
7331 finish_if_stmt (if_stmt
);
7333 else if (DECL_THREAD_LOCAL_P (decl
))
7334 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7336 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7340 /* Make TYPE a complete type based on INITIAL_VALUE.
7341 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7342 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7343 3 if the initializer list is empty (in pedantic mode). */
7346 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7349 tree type
, elt_type
;
7351 /* Don't get confused by a CONSTRUCTOR for some other type. */
7352 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7353 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7358 unsigned HOST_WIDE_INT i
;
7361 /* An array of character type can be initialized from a
7362 brace-enclosed string constant.
7364 FIXME: this code is duplicated from reshape_init. Probably
7365 we should just call reshape_init here? */
7366 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7367 && TREE_CODE (initial_value
) == CONSTRUCTOR
7368 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7370 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7371 tree value
= (*v
)[0].value
;
7373 if (TREE_CODE (value
) == STRING_CST
7374 && v
->length () == 1)
7375 initial_value
= value
;
7378 /* If any of the elements are parameter packs, we can't actually
7379 complete this type now because the array size is dependent. */
7380 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7382 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7385 if (PACK_EXPANSION_P (value
))
7391 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7393 /* We can create the array before the element type is complete, which
7394 means that we didn't have these two bits set in the original type
7395 either. In completing the type, we are expected to propagate these
7396 bits. See also complete_type which does the same thing for arrays
7399 if (TYPE_DOMAIN (type
))
7401 elt_type
= TREE_TYPE (type
);
7402 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7403 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7404 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7410 /* As above, but either give an error or reject zero-size arrays, depending
7414 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7415 bool do_default
, tsubst_flags_t complain
)
7418 bool sfinae
= !(complain
& tf_error
);
7419 /* In SFINAE context we can't be lenient about zero-size arrays. */
7422 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7428 /* Not an error. */;
7429 else if (failure
== 1)
7430 error ("initializer fails to determine size of %qT", *ptype
);
7431 else if (failure
== 2)
7434 error ("array size missing in %qT", *ptype
);
7436 else if (failure
== 3)
7437 error ("zero-size array %qT", *ptype
);
7438 *ptype
= error_mark_node
;
7443 /* Return zero if something is declared to be a member of type
7444 CTYPE when in the context of CUR_TYPE. STRING is the error
7445 message to print in that case. Otherwise, quietly return 1. */
7448 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7450 if (ctype
&& ctype
!= cur_type
)
7452 if (flags
== DTOR_FLAG
)
7453 error ("destructor for alien class %qT cannot be a member", ctype
);
7455 error ("constructor for alien class %qT cannot be a member", ctype
);
7461 /* Subroutine of `grokdeclarator'. */
7463 /* Generate errors possibly applicable for a given set of specifiers.
7464 This is for ARM $7.1.2. */
7467 bad_specifiers (tree object
,
7468 enum bad_spec_place type
,
7479 error ("%qD declared as a %<virtual%> variable", object
);
7481 error ("%qD declared as an %<inline%> variable", object
);
7483 error ("%<const%> and %<volatile%> function specifiers on "
7484 "%qD invalid in variable declaration", object
);
7488 error ("%qD declared as a %<virtual%> parameter", object
);
7490 error ("%qD declared as an %<inline%> parameter", object
);
7492 error ("%<const%> and %<volatile%> function specifiers on "
7493 "%qD invalid in parameter declaration", object
);
7497 error ("%qD declared as a %<virtual%> type", object
);
7499 error ("%qD declared as an %<inline%> type", object
);
7501 error ("%<const%> and %<volatile%> function specifiers on "
7502 "%qD invalid in type declaration", object
);
7506 error ("%qD declared as a %<virtual%> field", object
);
7508 error ("%qD declared as an %<inline%> field", object
);
7510 error ("%<const%> and %<volatile%> function specifiers on "
7511 "%qD invalid in field declaration", object
);
7517 error ("%q+D declared as a friend", object
);
7519 && (TREE_CODE (object
) == TYPE_DECL
7520 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7521 && !TYPE_REFFN_P (TREE_TYPE (object
))
7522 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7523 error ("%q+D declared with an exception specification", object
);
7526 /* DECL is a member function or static data member and is presently
7527 being defined. Check that the definition is taking place in a
7531 check_class_member_definition_namespace (tree decl
)
7533 /* These checks only apply to member functions and static data
7535 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7536 /* We check for problems with specializations in pt.c in
7537 check_specialization_namespace, where we can issue better
7539 if (processing_specialization
)
7541 /* There are no restrictions on the placement of
7542 explicit instantiations. */
7543 if (processing_explicit_instantiation
)
7547 A member function definition that appears outside of the
7548 class definition shall appear in a namespace scope enclosing
7549 the class definition.
7553 The definition for a static data member shall appear in a
7554 namespace scope enclosing the member's class definition. */
7555 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7556 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7557 decl
, DECL_CONTEXT (decl
));
7560 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7561 METHOD_TYPE for a non-static member function; QUALS are the
7562 cv-qualifiers that apply to the function. */
7565 build_this_parm (tree type
, cp_cv_quals quals
)
7570 cp_cv_quals this_quals
;
7572 if (CLASS_TYPE_P (type
))
7575 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7576 this_type
= build_pointer_type (this_type
);
7579 this_type
= type_of_this_parm (type
);
7580 /* The `this' parameter is implicitly `const'; it cannot be
7582 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7583 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7584 parm
= build_artificial_parm (this_identifier
, qual_type
);
7585 cp_apply_type_quals_to_decl (this_quals
, parm
);
7589 /* DECL is a static member function. Complain if it was declared
7590 with function-cv-quals. */
7593 check_static_quals (tree decl
, cp_cv_quals quals
)
7595 if (quals
!= TYPE_UNQUALIFIED
)
7596 error ("static member function %q#D declared with type qualifiers",
7600 /* Helper function. Replace the temporary this parameter injected
7601 during cp_finish_omp_declare_simd with the real this parameter. */
7604 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7606 tree this_parm
= (tree
) data
;
7607 if (TREE_CODE (*tp
) == PARM_DECL
7608 && DECL_NAME (*tp
) == this_identifier
7609 && *tp
!= this_parm
)
7611 else if (TYPE_P (*tp
))
7616 /* CTYPE is class type, or null if non-class.
7617 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7619 DECLARATOR is the function's name.
7620 PARMS is a chain of PARM_DECLs for the function.
7621 VIRTUALP is truthvalue of whether the function is virtual or not.
7622 FLAGS are to be passed through to `grokclassfn'.
7623 QUALS are qualifiers indicating whether the function is `const'
7625 RAISES is a list of exceptions that this function can raise.
7626 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7627 not look, and -1 if we should not call `grokclassfn' at all.
7629 SFK is the kind of special function (if any) for the new function.
7631 Returns `NULL_TREE' if something goes wrong, after issuing
7632 applicable error messages. */
7635 grokfndecl (tree ctype
,
7639 tree orig_declarator
,
7641 enum overload_flags flags
,
7643 cp_ref_qualifier rqual
,
7650 special_function_kind sfk
,
7655 location_t location
)
7658 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7662 type
= build_ref_qualified_type (type
, rqual
);
7664 type
= build_exception_variant (type
, raises
);
7666 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7668 /* If we have an explicit location, use it, otherwise use whatever
7669 build_lang_decl used (probably input_location). */
7670 if (location
!= UNKNOWN_LOCATION
)
7671 DECL_SOURCE_LOCATION (decl
) = location
;
7673 if (TREE_CODE (type
) == METHOD_TYPE
)
7676 parm
= build_this_parm (type
, quals
);
7677 DECL_CHAIN (parm
) = parms
;
7680 DECL_ARGUMENTS (decl
) = parms
;
7681 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7682 DECL_CONTEXT (t
) = decl
;
7683 /* Propagate volatile out from type to decl. */
7684 if (TYPE_VOLATILE (type
))
7685 TREE_THIS_VOLATILE (decl
) = 1;
7687 /* Setup decl according to sfk. */
7690 case sfk_constructor
:
7691 case sfk_copy_constructor
:
7692 case sfk_move_constructor
:
7693 DECL_CONSTRUCTOR_P (decl
) = 1;
7695 case sfk_destructor
:
7696 DECL_DESTRUCTOR_P (decl
) = 1;
7702 /* If pointers to member functions use the least significant bit to
7703 indicate whether a function is virtual, ensure a pointer
7704 to this function will have that bit clear. */
7705 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7706 && TREE_CODE (type
) == METHOD_TYPE
7707 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7708 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7711 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7715 ("defining explicit specialization %qD in friend declaration",
7719 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7720 tree args
= TREE_OPERAND (orig_declarator
, 1);
7722 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7724 /* Something like `template <class T> friend void f<T>()'. */
7725 error ("invalid use of template-id %qD in declaration "
7726 "of primary template",
7732 /* A friend declaration of the form friend void f<>(). Record
7733 the information in the TEMPLATE_ID_EXPR. */
7734 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7736 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7737 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7739 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7740 if (TREE_PURPOSE (t
)
7741 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7743 error ("default arguments are not allowed in declaration "
7744 "of friend template specialization %qD",
7750 error ("%<inline%> is not allowed in declaration of friend "
7751 "template specialization %qD",
7754 error ("%<constexpr%> is not allowed in declaration of friend "
7755 "template specialization %qD",
7762 /* If this decl has namespace scope, set that up. */
7764 set_decl_namespace (decl
, in_namespace
, friendp
);
7766 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7768 /* `main' and builtins have implicit 'C' linkage. */
7769 if ((MAIN_NAME_P (declarator
)
7770 || (IDENTIFIER_LENGTH (declarator
) > 10
7771 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7772 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7773 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7774 || (targetcm
.cxx_implicit_extern_c
7775 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7776 && current_lang_name
== lang_name_cplusplus
7777 && ctype
== NULL_TREE
7778 && DECL_FILE_SCOPE_P (decl
))
7779 SET_DECL_LANGUAGE (decl
, lang_c
);
7781 /* Should probably propagate const out from type to decl I bet (mrs). */
7784 DECL_STATIC_FUNCTION_P (decl
) = 1;
7785 DECL_CONTEXT (decl
) = ctype
;
7789 DECL_DELETED_FN (decl
) = 1;
7793 DECL_CONTEXT (decl
) = ctype
;
7795 check_class_member_definition_namespace (decl
);
7798 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7800 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7801 error ("cannot declare %<::main%> to be a template");
7803 error ("cannot declare %<::main%> to be inline");
7805 error ("cannot declare %<::main%> to be constexpr");
7807 error ("cannot declare %<::main%> to be static");
7812 /* Members of anonymous types and local classes have no linkage; make
7813 them internal. If a typedef is made later, this will be changed. */
7814 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7815 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7818 if (publicp
&& cxx_dialect
== cxx98
)
7820 /* [basic.link]: A name with no linkage (notably, the name of a class
7821 or enumeration declared in a local scope) shall not be used to
7822 declare an entity with linkage.
7824 DR 757 relaxes this restriction for C++0x. */
7825 no_linkage_error (decl
);
7828 TREE_PUBLIC (decl
) = publicp
;
7831 DECL_INTERFACE_KNOWN (decl
) = 1;
7832 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7835 /* If the declaration was declared inline, mark it as such. */
7838 DECL_DECLARED_INLINE_P (decl
) = 1;
7840 DECL_COMDAT (decl
) = 1;
7843 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7845 DECL_EXTERNAL (decl
) = 1;
7846 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7851 ? G_("static member function %qD cannot have cv-qualifier")
7852 : G_("non-member function %qD cannot have cv-qualifier"),
7854 quals
= TYPE_UNQUALIFIED
;
7860 ? G_("static member function %qD cannot have ref-qualifier")
7861 : G_("non-member function %qD cannot have ref-qualifier"),
7863 rqual
= REF_QUAL_NONE
;
7867 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7868 && !grok_op_properties (decl
, /*complain=*/true))
7870 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7872 bool long_long_unsigned_p
;
7874 const char *suffix
= NULL
;
7875 /* [over.literal]/6: Literal operators shall not have C linkage. */
7876 if (DECL_LANGUAGE (decl
) == lang_c
)
7878 error ("literal operator with C linkage");
7882 if (DECL_NAMESPACE_SCOPE_P (decl
))
7884 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7887 error ("%qD has invalid argument list", decl
);
7891 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7892 if (long_long_unsigned_p
)
7894 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7895 warning (0, "integer suffix %<%s%>"
7896 " shadowed by implementation", suffix
);
7898 else if (long_double_p
)
7900 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7901 warning (0, "floating point suffix %<%s%>"
7902 " shadowed by implementation", suffix
);
7907 error ("%qD must be a non-member function", decl
);
7913 /* Make the init_value nonzero so pushdecl knows this is not
7914 tentative. error_mark_node is replaced later with the BLOCK. */
7915 DECL_INITIAL (decl
) = error_mark_node
;
7917 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7918 TREE_NOTHROW (decl
) = 1;
7920 if (flag_openmp
|| flag_cilkplus
)
7922 /* Adjust "omp declare simd" attributes. */
7923 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7927 for (attr
= ods
; attr
;
7928 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7930 if (TREE_CODE (type
) == METHOD_TYPE
)
7931 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7932 DECL_ARGUMENTS (decl
), NULL
);
7933 if (TREE_VALUE (attr
) != NULL_TREE
)
7935 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7936 cl
= c_omp_declare_simd_clauses_to_numbers
7937 (DECL_ARGUMENTS (decl
), cl
);
7939 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7941 TREE_VALUE (attr
) = NULL_TREE
;
7947 /* Caller will do the rest of this. */
7951 if (ctype
!= NULL_TREE
)
7952 grokclassfn (ctype
, decl
, flags
);
7955 if (cxx_dialect
>= cxx11
7956 && DECL_DESTRUCTOR_P (decl
)
7957 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7958 && !processing_template_decl
)
7959 deduce_noexcept_on_destructor (decl
);
7961 decl
= check_explicit_specialization (orig_declarator
, decl
,
7964 4 * (friendp
!= 0));
7965 if (decl
== error_mark_node
)
7968 if (DECL_STATIC_FUNCTION_P (decl
))
7969 check_static_quals (decl
, quals
);
7973 cplus_decl_attributes (&decl
, *attrlist
, 0);
7974 *attrlist
= NULL_TREE
;
7977 /* Check main's type after attributes have been applied. */
7978 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7980 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7983 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7985 error ("%<::main%> must return %<int%>");
7986 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7987 TREE_TYPE (decl
) = newtype
;
7990 check_main_parameter_types (decl
);
7993 if (ctype
!= NULL_TREE
7994 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7997 tree old_decl
= check_classfn (ctype
, decl
,
7998 (processing_template_decl
7999 > template_class_depth (ctype
))
8000 ? current_template_parms
8003 if (old_decl
== error_mark_node
)
8011 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8012 /* Because grokfndecl is always supposed to return a
8013 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8014 here. We depend on our callers to figure out that its
8015 really a template that's being returned. */
8016 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8018 if (DECL_STATIC_FUNCTION_P (old_decl
)
8019 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8021 /* Remove the `this' parm added by grokclassfn. */
8022 revert_static_member_fn (decl
);
8023 check_static_quals (decl
, quals
);
8025 if (DECL_ARTIFICIAL (old_decl
))
8027 error ("definition of implicitly-declared %qD", old_decl
);
8030 else if (DECL_DEFAULTED_FN (old_decl
))
8032 error ("definition of explicitly-defaulted %q+D", decl
);
8033 error ("%q+#D explicitly defaulted here", old_decl
);
8037 /* Since we've smashed OLD_DECL to its
8038 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8039 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8040 decl
= DECL_TEMPLATE_RESULT (decl
);
8042 /* Attempt to merge the declarations. This can fail, in
8043 the case of some invalid specialization declarations. */
8044 pushed_scope
= push_scope (ctype
);
8045 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8047 pop_scope (pushed_scope
);
8050 error ("no %q#D member function declared in class %qT",
8054 if (ok
== error_mark_node
)
8060 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8063 if (ctype
== NULL_TREE
|| check
)
8067 DECL_VIRTUAL_P (decl
) = 1;
8072 /* decl is a FUNCTION_DECL.
8073 specifiers are the parsed virt-specifiers.
8075 Set flags to reflect the virt-specifiers.
8080 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8082 if (decl
== NULL_TREE
)
8084 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8085 DECL_OVERRIDE_P (decl
) = 1;
8086 if (specifiers
& VIRT_SPEC_FINAL
)
8087 DECL_FINAL_P (decl
) = 1;
8091 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8092 the linkage that DECL will receive in the object file. */
8095 set_linkage_for_static_data_member (tree decl
)
8097 /* A static data member always has static storage duration and
8098 external linkage. Note that static data members are forbidden in
8099 local classes -- the only situation in which a class has
8100 non-external linkage. */
8101 TREE_PUBLIC (decl
) = 1;
8102 TREE_STATIC (decl
) = 1;
8103 /* For non-template classes, static data members are always put
8104 out in exactly those files where they are defined, just as
8105 with ordinary namespace-scope variables. */
8106 if (!processing_template_decl
)
8107 DECL_INTERFACE_KNOWN (decl
) = 1;
8110 /* Create a VAR_DECL named NAME with the indicated TYPE.
8112 If SCOPE is non-NULL, it is the class type or namespace containing
8113 the variable. If SCOPE is NULL, the variable should is created in
8114 the innermost enclosing scope. */
8117 grokvardecl (tree type
,
8119 tree orig_declarator
,
8120 const cp_decl_specifier_seq
*declspecs
,
8127 tree explicit_scope
;
8129 gcc_assert (!name
|| identifier_p (name
));
8131 /* Compute the scope in which to place the variable, but remember
8132 whether or not that scope was explicitly specified by the user. */
8133 explicit_scope
= scope
;
8136 /* An explicit "extern" specifier indicates a namespace-scope
8138 if (declspecs
->storage_class
== sc_extern
)
8139 scope
= current_decl_namespace ();
8140 else if (!at_function_scope_p ())
8141 scope
= current_scope ();
8145 && (/* If the variable is a namespace-scope variable declared in a
8146 template, we need DECL_LANG_SPECIFIC. */
8147 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8148 /* Similarly for namespace-scope variables with language linkage
8150 || (TREE_CODE (scope
) == NAMESPACE_DECL
8151 && current_lang_name
!= lang_name_cplusplus
)
8152 /* Similarly for static data members. */
8154 /* Similarly for explicit specializations. */
8156 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8157 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8159 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8161 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8162 set_decl_namespace (decl
, explicit_scope
, 0);
8164 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8166 if (declspecs
->storage_class
== sc_extern
)
8168 DECL_THIS_EXTERN (decl
) = 1;
8169 DECL_EXTERNAL (decl
) = !initialized
;
8172 if (DECL_CLASS_SCOPE_P (decl
))
8174 set_linkage_for_static_data_member (decl
);
8175 /* This function is only called with out-of-class definitions. */
8176 DECL_EXTERNAL (decl
) = 0;
8177 check_class_member_definition_namespace (decl
);
8179 /* At top level, either `static' or no s.c. makes a definition
8180 (perhaps tentative), and absence of `static' makes it public. */
8181 else if (toplevel_bindings_p ())
8183 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8184 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8185 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8187 /* Not at top level, only `static' makes a static definition. */
8190 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8191 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8194 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8196 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8197 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8198 if (declspecs
->gnu_thread_keyword_p
)
8199 DECL_GNU_TLS_P (decl
) = true;
8202 /* If the type of the decl has no linkage, make sure that we'll
8203 notice that in mark_used. */
8204 if (cxx_dialect
> cxx98
8205 && decl_linkage (decl
) != lk_none
8206 && DECL_LANG_SPECIFIC (decl
) == NULL
8207 && !DECL_EXTERN_C_P (decl
)
8208 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8209 retrofit_lang_decl (decl
);
8211 if (TREE_PUBLIC (decl
))
8213 /* [basic.link]: A name with no linkage (notably, the name of a class
8214 or enumeration declared in a local scope) shall not be used to
8215 declare an entity with linkage.
8217 DR 757 relaxes this restriction for C++0x. */
8218 if (cxx_dialect
< cxx11
)
8219 no_linkage_error (decl
);
8222 DECL_INTERFACE_KNOWN (decl
) = 1;
8224 // Handle explicit specializations and instantiations of variable templates.
8225 if (orig_declarator
)
8226 decl
= check_explicit_specialization (orig_declarator
, decl
,
8229 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8232 /* Create and return a canonical pointer to member function type, for
8233 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8236 build_ptrmemfunc_type (tree type
)
8241 if (type
== error_mark_node
)
8244 /* If a canonical type already exists for this type, use it. We use
8245 this method instead of type_hash_canon, because it only does a
8246 simple equality check on the list of field members. */
8248 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8251 /* Make sure that we always have the unqualified pointer-to-member
8253 if (cp_cv_quals quals
= cp_type_quals (type
))
8255 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8256 return cp_build_qualified_type (unqual
, quals
);
8259 t
= make_node (RECORD_TYPE
);
8261 /* Let the front end know this is a pointer to member function. */
8262 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8264 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8267 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8269 DECL_CHAIN (field
) = fields
;
8272 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8274 /* Zap out the name so that the back end will give us the debugging
8275 information for this anonymous RECORD_TYPE. */
8276 TYPE_NAME (t
) = NULL_TREE
;
8278 /* Cache this pointer-to-member type so that we can find it again
8280 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8282 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8283 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8284 else if (TYPE_CANONICAL (type
) != type
)
8285 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8290 /* Create and return a pointer to data member type. */
8293 build_ptrmem_type (tree class_type
, tree member_type
)
8295 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8297 cp_cv_quals quals
= type_memfn_quals (member_type
);
8298 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8299 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8300 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8304 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8305 return build_offset_type (class_type
, member_type
);
8309 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8310 Check to see that the definition is valid. Issue appropriate error
8311 messages. Return 1 if the definition is particularly bad, or 0
8315 check_static_variable_definition (tree decl
, tree type
)
8317 /* Can't check yet if we don't know the type. */
8318 if (dependent_type_p (type
))
8320 /* If DECL is declared constexpr, we'll do the appropriate checks
8321 in check_initializer. */
8322 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8324 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8326 if (!COMPLETE_TYPE_P (type
))
8327 error ("in-class initialization of static data member %q#D of "
8328 "incomplete type", decl
);
8329 else if (literal_type_p (type
))
8330 permerror (input_location
,
8331 "%<constexpr%> needed for in-class initialization of "
8332 "static data member %q#D of non-integral type", decl
);
8334 error ("in-class initialization of static data member %q#D of "
8335 "non-literal type", decl
);
8339 /* Motion 10 at San Diego: If a static const integral data member is
8340 initialized with an integral constant expression, the initializer
8341 may appear either in the declaration (within the class), or in
8342 the definition, but not both. If it appears in the class, the
8343 member is a member constant. The file-scope definition is always
8345 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8347 error ("invalid in-class initialization of static data member "
8348 "of non-integral type %qT",
8352 else if (!CP_TYPE_CONST_P (type
))
8353 error ("ISO C++ forbids in-class initialization of non-const "
8354 "static member %qD",
8356 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8357 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8358 "%qD of non-integral type %qT", decl
, type
);
8363 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8364 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8365 expressions out into temporary variables so that walk_tree doesn't
8366 step into them (c++/15764). */
8369 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8371 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8372 tree expr
= *expr_p
;
8373 if (TREE_CODE (expr
) == SAVE_EXPR
)
8375 tree op
= TREE_OPERAND (expr
, 0);
8376 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8377 if (TREE_SIDE_EFFECTS (op
))
8378 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8381 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8386 /* Entry point for the above. */
8389 stabilize_vla_size (tree size
)
8391 hash_set
<tree
> pset
;
8392 /* Break out any function calls into temporary variables. */
8393 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8396 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8397 not inside of SAVE_EXPR and fold them. */
8400 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8402 tree expr
= *expr_p
;
8403 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8405 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8407 *(bool *)data
= true;
8408 if (SIZEOF_EXPR_TYPE_P (expr
))
8409 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8410 SIZEOF_EXPR
, false);
8411 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8412 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8415 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8417 if (expr
== error_mark_node
)
8418 expr
= size_one_node
;
8425 /* Given the SIZE (i.e., number of elements) in an array, compute an
8426 appropriate index type for the array. If non-NULL, NAME is the
8427 name of the thing being declared. */
8430 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8435 if (error_operand_p (size
))
8436 return error_mark_node
;
8438 if (!type_dependent_expression_p (size
))
8440 tree type
= TREE_TYPE (size
);
8442 mark_rvalue_use (size
);
8444 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8445 && TREE_SIDE_EFFECTS (size
))
8446 /* In C++98, we mark a non-constant array bound with a magic
8447 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8450 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8452 if (CLASS_TYPE_P (type
)
8453 && CLASSTYPE_LITERAL_P (type
))
8455 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8458 if (!(complain
& tf_error
))
8459 return error_mark_node
;
8461 error ("size of array %qD has non-integral type %qT",
8464 error ("size of array has non-integral type %qT", type
);
8465 size
= integer_one_node
;
8467 if (size
== error_mark_node
)
8468 return error_mark_node
;
8469 type
= TREE_TYPE (size
);
8472 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8473 size
= maybe_constant_value (size
);
8475 if (!TREE_CONSTANT (size
))
8479 if (error_operand_p (size
))
8480 return error_mark_node
;
8482 /* The array bound must be an integer type. */
8483 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8485 if (!(complain
& tf_error
))
8486 return error_mark_node
;
8488 error ("size of array %qD has non-integral type %qT", name
, type
);
8490 error ("size of array has non-integral type %qT", type
);
8491 size
= integer_one_node
;
8492 type
= TREE_TYPE (size
);
8496 /* A type is dependent if it is...an array type constructed from any
8497 dependent type or whose size is specified by a constant expression
8498 that is value-dependent. */
8499 /* We can only call value_dependent_expression_p on integral constant
8500 expressions; treat non-constant expressions as dependent, too. */
8501 if (processing_template_decl
8502 && (type_dependent_expression_p (size
)
8503 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8505 /* We cannot do any checking for a SIZE that isn't known to be
8506 constant. Just build the index type and mark that it requires
8507 structural equality checks. */
8508 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8509 size
, size_one_node
));
8510 TYPE_DEPENDENT_P (itype
) = 1;
8511 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8512 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8516 /* Normally, the array-bound will be a constant. */
8517 if (TREE_CODE (size
) == INTEGER_CST
)
8519 /* Check to see if the array bound overflowed. Make that an
8520 error, no matter how generous we're being. */
8521 constant_expression_error (size
);
8523 /* An array must have a positive number of elements. */
8524 if (tree_int_cst_lt (size
, integer_zero_node
))
8526 if (!(complain
& tf_error
))
8527 return error_mark_node
;
8529 error ("size of array %qD is negative", name
);
8531 error ("size of array is negative");
8532 size
= integer_one_node
;
8534 /* As an extension we allow zero-sized arrays. */
8535 else if (integer_zerop (size
))
8537 if (!(complain
& tf_error
))
8538 /* We must fail if performing argument deduction (as
8539 indicated by the state of complain), so that
8540 another substitution can be found. */
8541 return error_mark_node
;
8542 else if (in_system_header_at (input_location
))
8543 /* Allow them in system headers because glibc uses them. */;
8545 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8547 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8550 else if (TREE_CONSTANT (size
)
8551 /* We don't allow VLAs at non-function scopes, or during
8552 tentative template substitution. */
8553 || !at_function_scope_p ()
8554 || !(complain
& tf_error
))
8556 if (!(complain
& tf_error
))
8557 return error_mark_node
;
8558 /* `(int) &fn' is not a valid array bound. */
8560 error ("size of array %qD is not an integral constant-expression",
8563 error ("size of array is not an integral constant-expression");
8564 size
= integer_one_node
;
8566 else if (pedantic
&& warn_vla
!= 0)
8569 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8571 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8573 else if (warn_vla
> 0)
8577 "variable length array %qD is used", name
);
8580 "variable length array is used");
8583 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8584 /* A variable sized array. */
8585 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8588 HOST_WIDE_INT saved_processing_template_decl
;
8590 /* Compute the index of the largest element in the array. It is
8591 one less than the number of elements in the array. We save
8592 and restore PROCESSING_TEMPLATE_DECL so that computations in
8593 cp_build_binary_op will be appropriately folded. */
8594 saved_processing_template_decl
= processing_template_decl
;
8595 processing_template_decl
= 0;
8596 itype
= cp_build_binary_op (input_location
,
8598 cp_convert (ssizetype
, size
, complain
),
8599 cp_convert (ssizetype
, integer_one_node
,
8602 itype
= fold (itype
);
8603 processing_template_decl
= saved_processing_template_decl
;
8605 if (!TREE_CONSTANT (itype
))
8607 /* A variable sized array. */
8608 itype
= variable_size (itype
);
8610 if (TREE_CODE (itype
) != SAVE_EXPR
)
8612 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8613 they might survive till gimplification. */
8614 tree newitype
= itype
;
8616 cp_walk_tree_without_duplicates (&newitype
,
8617 fold_sizeof_expr_r
, &found
);
8619 itype
= variable_size (fold (newitype
));
8622 stabilize_vla_size (itype
);
8624 if (flag_sanitize
& SANITIZE_VLA
8625 && do_ubsan_in_current_function ())
8627 /* We have to add 1 -- in the ubsan routine we generate
8628 LE_EXPR rather than LT_EXPR. */
8629 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8630 build_one_cst (TREE_TYPE (itype
)));
8631 t
= ubsan_instrument_vla (input_location
, t
);
8632 finish_expr_stmt (t
);
8635 /* Make sure that there was no overflow when creating to a signed
8636 index type. (For example, on a 32-bit machine, an array with
8637 size 2^32 - 1 is too big.) */
8638 else if (TREE_CODE (itype
) == INTEGER_CST
8639 && TREE_OVERFLOW (itype
))
8641 if (!(complain
& tf_error
))
8642 return error_mark_node
;
8643 error ("overflow in array dimension");
8644 TREE_OVERFLOW (itype
) = 0;
8648 /* Create and return the appropriate index type. */
8649 itype
= build_index_type (itype
);
8651 /* If the index type were dependent, we would have returned early, so
8652 remember that it isn't. */
8653 TYPE_DEPENDENT_P (itype
) = 0;
8654 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8658 /* Returns the scope (if any) in which the entity declared by
8659 DECLARATOR will be located. If the entity was declared with an
8660 unqualified name, NULL_TREE is returned. */
8663 get_scope_of_declarator (const cp_declarator
*declarator
)
8665 while (declarator
&& declarator
->kind
!= cdk_id
)
8666 declarator
= declarator
->declarator
;
8668 /* If the declarator-id is a SCOPE_REF, the scope in which the
8669 declaration occurs is the first operand. */
8671 && declarator
->u
.id
.qualifying_scope
)
8672 return declarator
->u
.id
.qualifying_scope
;
8674 /* Otherwise, the declarator is not a qualified name; the entity will
8675 be declared in the current scope. */
8679 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8680 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8684 create_array_type_for_decl (tree name
, tree type
, tree size
)
8686 tree itype
= NULL_TREE
;
8688 /* If things have already gone awry, bail now. */
8689 if (type
== error_mark_node
|| size
== error_mark_node
)
8690 return error_mark_node
;
8692 /* 8.3.4/1: If the type of the identifier of D contains the auto
8693 type-specifier, the program is ill-formed. */
8694 if (type_uses_auto (type
))
8696 error ("%qD declared as array of %qT", name
, type
);
8697 return error_mark_node
;
8700 /* If there are some types which cannot be array elements,
8701 issue an error-message and return. */
8702 switch (TREE_CODE (type
))
8706 error ("declaration of %qD as array of void", name
);
8708 error ("creating array of void");
8709 return error_mark_node
;
8713 error ("declaration of %qD as array of functions", name
);
8715 error ("creating array of functions");
8716 return error_mark_node
;
8718 case REFERENCE_TYPE
:
8720 error ("declaration of %qD as array of references", name
);
8722 error ("creating array of references");
8723 return error_mark_node
;
8727 error ("declaration of %qD as array of function members", name
);
8729 error ("creating array of function members");
8730 return error_mark_node
;
8738 The constant expressions that specify the bounds of the arrays
8739 can be omitted only for the first member of the sequence. */
8740 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8743 error ("declaration of %qD as multidimensional array must "
8744 "have bounds for all dimensions except the first",
8747 error ("multidimensional array must have bounds for all "
8748 "dimensions except the first");
8750 return error_mark_node
;
8753 /* Figure out the index type for the array. */
8755 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8758 T is called the array element type; this type shall not be [...] an
8759 abstract class type. */
8760 abstract_virtuals_error (name
, type
);
8762 return build_cplus_array_type (type
, itype
);
8765 /* Check that it's OK to declare a function with the indicated TYPE.
8766 SFK indicates the kind of special function (if any) that this
8767 function is. OPTYPE is the type given in a conversion operator
8768 declaration, or the class type for a constructor/destructor.
8769 Returns the actual return type of the function; that
8770 may be different than TYPE if an error occurs, or for certain
8771 special functions. */
8774 check_special_function_return_type (special_function_kind sfk
,
8780 case sfk_constructor
:
8782 error ("return type specification for constructor invalid");
8784 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8785 type
= build_pointer_type (optype
);
8787 type
= void_type_node
;
8790 case sfk_destructor
:
8792 error ("return type specification for destructor invalid");
8793 /* We can't use the proper return type here because we run into
8794 problems with ambiguous bases and covariant returns.
8795 Java classes are left unchanged because (void *) isn't a valid
8796 Java type, and we don't want to change the Java ABI. */
8797 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8798 type
= build_pointer_type (void_type_node
);
8800 type
= void_type_node
;
8803 case sfk_conversion
:
8805 error ("return type specified for %<operator %T%>", optype
);
8816 /* A variable or data member (whose unqualified name is IDENTIFIER)
8817 has been declared with the indicated TYPE. If the TYPE is not
8818 acceptable, issue an error message and return a type to use for
8819 error-recovery purposes. */
8822 check_var_type (tree identifier
, tree type
)
8824 if (VOID_TYPE_P (type
))
8827 error ("unnamed variable or field declared void");
8828 else if (identifier_p (identifier
))
8830 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8831 error ("variable or field %qE declared void", identifier
);
8834 error ("variable or field declared void");
8835 type
= error_mark_node
;
8841 /* Given declspecs and a declarator (abstract or otherwise), determine
8842 the name and type of the object declared and construct a DECL node
8845 DECLSPECS points to the representation of declaration-specifier
8846 sequence that precedes declarator.
8848 DECL_CONTEXT says which syntactic context this declaration is in:
8849 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8850 FUNCDEF for a function definition. Like NORMAL but a few different
8851 error messages in each case. Return value may be zero meaning
8852 this definition is too screwy to try to parse.
8853 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8854 handle member functions (which have FIELD context).
8855 Return value may be zero meaning this definition is too screwy to
8857 PARM for a parameter declaration (either within a function prototype
8858 or before a function body). Make a PARM_DECL, or return void_type_node.
8859 TPARM for a template parameter declaration.
8860 CATCHPARM for a parameter declaration before a catch clause.
8861 TYPENAME if for a typename (in a cast or sizeof).
8862 Don't make a DECL node; just return the ..._TYPE node.
8863 FIELD for a struct or union field; make a FIELD_DECL.
8864 BITFIELD for a field with specified width.
8866 INITIALIZED is as for start_decl.
8868 ATTRLIST is a pointer to the list of attributes, which may be NULL
8869 if there are none; *ATTRLIST may be modified if attributes from inside
8870 the declarator should be applied to the declaration.
8872 When this function is called, scoping variables (such as
8873 CURRENT_CLASS_TYPE) should reflect the scope in which the
8874 declaration occurs, not the scope in which the new declaration will
8875 be placed. For example, on:
8879 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8882 Returns a DECL (if a declarator is present), a TYPE (if there is no
8883 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8887 grokdeclarator (const cp_declarator
*declarator
,
8888 cp_decl_specifier_seq
*declspecs
,
8889 enum decl_context decl_context
,
8893 tree type
= NULL_TREE
;
8895 int explicit_intN
= 0;
8896 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8897 int explicit_int
= 0;
8898 int explicit_char
= 0;
8899 int defaulted_int
= 0;
8901 tree typedef_decl
= NULL_TREE
;
8902 const char *name
= NULL
;
8903 tree typedef_type
= NULL_TREE
;
8904 /* True if this declarator is a function definition. */
8905 bool funcdef_flag
= false;
8906 cp_declarator_kind innermost_code
= cdk_error
;
8909 /* See the code below that used this. */
8910 tree decl_attr
= NULL_TREE
;
8913 /* Keep track of what sort of function is being processed
8914 so that we can warn about default return values, or explicit
8915 return values which do not match prescribed defaults. */
8916 special_function_kind sfk
= sfk_none
;
8918 tree dname
= NULL_TREE
;
8919 tree ctor_return_type
= NULL_TREE
;
8920 enum overload_flags flags
= NO_SPECIAL
;
8921 /* cv-qualifiers that apply to the declarator, for a declaration of
8922 a member function. */
8923 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8924 /* virt-specifiers that apply to the declarator, for a declaration of
8925 a member function. */
8926 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8927 /* ref-qualifier that applies to the declarator, for a declaration of
8928 a member function. */
8929 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8930 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8932 tree raises
= NULL_TREE
;
8933 int template_count
= 0;
8934 tree returned_attrs
= NULL_TREE
;
8935 tree parms
= NULL_TREE
;
8936 const cp_declarator
*id_declarator
;
8937 /* The unqualified name of the declarator; either an
8938 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8939 tree unqualified_id
;
8940 /* The class type, if any, in which this entity is located,
8941 or NULL_TREE if none. Note that this value may be different from
8942 the current class type; for example if an attempt is made to declare
8943 "A::f" inside "B", this value will be "A". */
8944 tree ctype
= current_class_type
;
8945 /* The NAMESPACE_DECL for the namespace in which this entity is
8946 located. If an unqualified name is used to declare the entity,
8947 this value will be NULL_TREE, even if the entity is located at
8949 tree in_namespace
= NULL_TREE
;
8950 cp_storage_class storage_class
;
8951 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8952 bool type_was_error_mark_node
= false;
8953 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8954 bool template_type_arg
= false;
8955 bool template_parm_flag
= false;
8956 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8957 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8958 bool late_return_type_p
= false;
8959 bool array_parameter_p
= false;
8960 source_location saved_loc
= input_location
;
8963 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8964 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8965 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8966 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8967 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8968 explicit_intN
= declspecs
->explicit_intN_p
;
8969 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8971 if (decl_context
== FUNCDEF
)
8972 funcdef_flag
= true, decl_context
= NORMAL
;
8973 else if (decl_context
== MEMFUNCDEF
)
8974 funcdef_flag
= true, decl_context
= FIELD
;
8975 else if (decl_context
== BITFIELD
)
8976 bitfield
= 1, decl_context
= FIELD
;
8977 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8978 template_type_arg
= true, decl_context
= TYPENAME
;
8979 else if (decl_context
== TPARM
)
8980 template_parm_flag
= true, decl_context
= PARM
;
8982 if (initialized
> 1)
8983 funcdef_flag
= true;
8985 /* Look inside a declarator for the name being declared
8986 and get it as a string, for an error message. */
8987 for (id_declarator
= declarator
;
8989 id_declarator
= id_declarator
->declarator
)
8991 if (id_declarator
->kind
!= cdk_id
)
8992 innermost_code
= id_declarator
->kind
;
8994 switch (id_declarator
->kind
)
8997 if (id_declarator
->declarator
8998 && id_declarator
->declarator
->kind
== cdk_id
)
9000 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
9001 if (sfk
== sfk_destructor
)
9008 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9009 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9012 if (qualifying_scope
)
9014 if (at_function_scope_p ())
9018 A declarator-id shall not be qualified except
9021 None of the cases are permitted in block
9023 if (qualifying_scope
== global_namespace
)
9024 error ("invalid use of qualified-name %<::%D%>",
9026 else if (TYPE_P (qualifying_scope
))
9027 error ("invalid use of qualified-name %<%T::%D%>",
9028 qualifying_scope
, decl
);
9030 error ("invalid use of qualified-name %<%D::%D%>",
9031 qualifying_scope
, decl
);
9032 return error_mark_node
;
9034 else if (TYPE_P (qualifying_scope
))
9036 ctype
= qualifying_scope
;
9037 if (!MAYBE_CLASS_TYPE_P (ctype
))
9039 error ("%q#T is not a class or a namespace", ctype
);
9042 else if (innermost_code
!= cdk_function
9043 && current_class_type
9044 && !uniquely_derived_from_p (ctype
,
9045 current_class_type
))
9047 error ("invalid use of qualified-name %<%T::%D%>",
9048 qualifying_scope
, decl
);
9049 return error_mark_node
;
9052 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9053 in_namespace
= qualifying_scope
;
9055 switch (TREE_CODE (decl
))
9061 if (innermost_code
!= cdk_function
)
9063 error ("declaration of %qD as non-function", decl
);
9064 return error_mark_node
;
9066 else if (!qualifying_scope
9067 && !(current_class_type
&& at_class_scope_p ()))
9069 error ("declaration of %qD as non-member", decl
);
9070 return error_mark_node
;
9073 type
= TREE_OPERAND (decl
, 0);
9075 type
= constructor_name (type
);
9076 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9081 case TEMPLATE_ID_EXPR
:
9083 tree fns
= TREE_OPERAND (decl
, 0);
9086 if (!identifier_p (dname
))
9088 if (variable_template_p (dname
))
9089 dname
= DECL_NAME (dname
);
9092 gcc_assert (is_overloaded_fn (dname
));
9093 dname
= DECL_NAME (get_first_fn (dname
));
9099 case IDENTIFIER_NODE
:
9100 if (identifier_p (decl
))
9103 if (C_IS_RESERVED_WORD (dname
))
9105 error ("declarator-id missing; using reserved word %qD",
9107 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9109 else if (!IDENTIFIER_TYPENAME_P (dname
))
9110 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9113 gcc_assert (flags
== NO_SPECIAL
);
9114 flags
= TYPENAME_FLAG
;
9115 ctor_return_type
= TREE_TYPE (dname
);
9116 sfk
= sfk_conversion
;
9117 if (is_typename_at_global_scope (dname
))
9118 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9120 name
= "<invalid operator>";
9137 return error_mark_node
;
9142 if (id_declarator
->kind
== cdk_id
)
9148 The declarator in a function-definition shall have the form
9149 D1 ( parameter-declaration-clause) ... */
9150 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9152 error ("function definition does not declare parameters");
9153 return error_mark_node
;
9156 if (flags
== TYPENAME_FLAG
9157 && innermost_code
!= cdk_function
9158 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9160 error ("declaration of %qD as non-function", dname
);
9161 return error_mark_node
;
9165 && identifier_p (dname
)
9166 && UDLIT_OPER_P (dname
)
9167 && innermost_code
!= cdk_function
)
9169 error ("declaration of %qD as non-function", dname
);
9170 return error_mark_node
;
9173 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9177 error ("declaration of %qD as %<typedef%>", dname
);
9178 return error_mark_node
;
9180 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9182 error ("declaration of %qD as parameter", dname
);
9183 return error_mark_node
;
9187 /* Anything declared one level down from the top level
9188 must be one of the parameters of a function
9189 (because the body is at least two levels down). */
9191 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9192 by not allowing C++ class definitions to specify their parameters
9193 with xdecls (must be spec.d in the parmlist).
9195 Since we now wait to push a class scope until we are sure that
9196 we are in a legitimate method context, we must set oldcname
9197 explicitly (since current_class_name is not yet alive).
9199 We also want to avoid calling this a PARM if it is in a namespace. */
9201 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9203 cp_binding_level
*b
= current_binding_level
;
9204 current_binding_level
= b
->level_chain
;
9205 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9206 decl_context
= PARM
;
9207 current_binding_level
= b
;
9211 name
= decl_context
== PARM
? "parameter" : "type name";
9213 if (constexpr_p
&& typedef_p
)
9215 error ("%<constexpr%> cannot appear in a typedef declaration");
9216 return error_mark_node
;
9219 /* If there were multiple types specified in the decl-specifier-seq,
9220 issue an error message. */
9221 if (declspecs
->multiple_types_p
)
9223 error ("two or more data types in declaration of %qs", name
);
9224 return error_mark_node
;
9227 if (declspecs
->conflicting_specifiers_p
)
9229 error ("conflicting specifiers in declaration of %qs", name
);
9230 return error_mark_node
;
9233 /* Extract the basic type from the decl-specifier-seq. */
9234 type
= declspecs
->type
;
9235 if (type
== error_mark_node
)
9238 type_was_error_mark_node
= true;
9240 /* If the entire declaration is itself tagged as deprecated then
9241 suppress reports of deprecated items. */
9242 if (type
&& TREE_DEPRECATED (type
)
9243 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9244 warn_deprecated_use (type
, NULL_TREE
);
9245 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9247 typedef_decl
= type
;
9248 type
= TREE_TYPE (typedef_decl
);
9249 if (TREE_DEPRECATED (type
)
9250 && DECL_ARTIFICIAL (typedef_decl
)
9251 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9252 warn_deprecated_use (type
, NULL_TREE
);
9254 /* No type at all: default to `int', and set DEFAULTED_INT
9255 because it was not a user-defined typedef. */
9256 if (type
== NULL_TREE
)
9258 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9260 /* These imply 'int'. */
9261 type
= integer_type_node
;
9264 /* If we just have "complex", it is equivalent to "complex double". */
9265 else if (!longlong
&& !explicit_intN
9266 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9268 type
= double_type_node
;
9269 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9270 "ISO C++ does not support plain %<complex%> meaning "
9271 "%<double complex%>");
9275 explicit_int
= declspecs
->explicit_int_p
;
9276 explicit_char
= declspecs
->explicit_char_p
;
9279 /* See the code below that used this. */
9281 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9283 typedef_type
= type
;
9286 if (sfk
!= sfk_conversion
)
9287 ctor_return_type
= ctype
;
9289 if (sfk
!= sfk_none
)
9290 type
= check_special_function_return_type (sfk
, type
,
9292 else if (type
== NULL_TREE
)
9298 /* We handle `main' specially here, because 'main () { }' is so
9299 common. With no options, it is allowed. With -Wreturn-type,
9300 it is a warning. It is only an error with -pedantic-errors. */
9301 is_main
= (funcdef_flag
9302 && dname
&& identifier_p (dname
)
9303 && MAIN_NAME_P (dname
)
9304 && ctype
== NULL_TREE
9305 && in_namespace
== NULL_TREE
9306 && current_namespace
== global_namespace
);
9308 if (type_was_error_mark_node
)
9309 /* We've already issued an error, don't complain more. */;
9310 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9311 /* Allow it, sigh. */;
9313 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9315 pedwarn (input_location
, OPT_Wpedantic
,
9316 "ISO C++ forbids declaration of %qs with no type", name
);
9318 warning (OPT_Wreturn_type
,
9319 "ISO C++ forbids declaration of %qs with no type", name
);
9321 type
= integer_type_node
;
9328 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9330 error ("%<__int%d%> is not supported by this target",
9331 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9332 explicit_intN
= false;
9334 else if (pedantic
&& ! in_system_header_at (input_location
))
9335 pedwarn (input_location
, OPT_Wpedantic
,
9336 "ISO C++ does not support %<__int%d%> for %qs",
9337 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9340 /* Now process the modifiers that were specified
9341 and check for invalid combinations. */
9343 /* Long double is a special combination. */
9344 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9347 type
= cp_build_qualified_type (long_double_type_node
,
9348 cp_type_quals (type
));
9351 /* Check all other uses of type modifiers. */
9353 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9357 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9358 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9359 else if (signed_p
&& unsigned_p
)
9360 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9361 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9362 error ("%<long long%> invalid for %qs", name
);
9363 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9364 error ("%<long%> invalid for %qs", name
);
9365 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9366 error ("%<short%> invalid for %qs", name
);
9367 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9368 error ("%<long%> or %<short%> invalid for %qs", name
);
9369 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9370 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9371 else if ((long_p
|| short_p
) && explicit_char
)
9372 error ("%<long%> or %<short%> specified with char for %qs", name
);
9373 else if (long_p
&& short_p
)
9374 error ("%<long%> and %<short%> specified together for %qs", name
);
9375 else if (type
== char16_type_node
|| type
== char32_type_node
)
9377 if (signed_p
|| unsigned_p
)
9378 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9379 else if (short_p
|| long_p
)
9380 error ("%<short%> or %<long%> invalid for %qs", name
);
9385 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9387 pedwarn (input_location
, OPT_Wpedantic
,
9388 "long, short, signed or unsigned used invalidly for %qs",
9390 if (flag_pedantic_errors
)
9395 /* Discard the type modifiers if they are invalid. */
9406 /* Decide whether an integer type is signed or not.
9407 Optionally treat bitfields as signed by default. */
9411 It is implementation-defined whether a plain (neither
9412 explicitly signed or unsigned) char, short, int, or long
9413 bit-field is signed or unsigned.
9415 Naturally, we extend this to long long as well. Note that
9416 this does not include wchar_t. */
9417 || (bitfield
&& !flag_signed_bitfields
9419 /* A typedef for plain `int' without `signed' can be
9420 controlled just like plain `int', but a typedef for
9421 `signed int' cannot be so controlled. */
9423 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9424 && TREE_CODE (type
) == INTEGER_TYPE
9425 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9428 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9430 type
= long_long_unsigned_type_node
;
9432 type
= long_unsigned_type_node
;
9434 type
= short_unsigned_type_node
;
9435 else if (type
== char_type_node
)
9436 type
= unsigned_char_type_node
;
9437 else if (typedef_decl
)
9438 type
= unsigned_type_for (type
);
9440 type
= unsigned_type_node
;
9442 else if (signed_p
&& type
== char_type_node
)
9443 type
= signed_char_type_node
;
9444 else if (explicit_intN
)
9445 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9447 type
= long_long_integer_type_node
;
9449 type
= long_integer_type_node
;
9451 type
= short_integer_type_node
;
9453 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9455 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9456 error ("complex invalid for %qs", name
);
9457 /* If a modifier is specified, the resulting complex is the complex
9458 form of TYPE. E.g, "complex short" is "complex short int". */
9459 else if (type
== integer_type_node
)
9460 type
= complex_integer_type_node
;
9461 else if (type
== float_type_node
)
9462 type
= complex_float_type_node
;
9463 else if (type
== double_type_node
)
9464 type
= complex_double_type_node
;
9465 else if (type
== long_double_type_node
)
9466 type
= complex_long_double_type_node
;
9468 type
= build_complex_type (type
);
9471 type_quals
= TYPE_UNQUALIFIED
;
9472 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9473 type_quals
|= TYPE_QUAL_CONST
;
9474 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9475 type_quals
|= TYPE_QUAL_VOLATILE
;
9476 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9477 type_quals
|= TYPE_QUAL_RESTRICT
;
9478 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9479 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9482 /* If we're using the injected-class-name to form a compound type or a
9483 declaration, replace it with the underlying class so we don't get
9484 redundant typedefs in the debug output. But if we are returning the
9485 type unchanged, leave it alone so that it's available to
9486 maybe_get_template_decl_from_type_decl. */
9487 if (CLASS_TYPE_P (type
)
9488 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9489 && type
== TREE_TYPE (TYPE_NAME (type
))
9490 && (declarator
|| type_quals
))
9491 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9493 type_quals
|= cp_type_quals (type
);
9494 type
= cp_build_qualified_type_real
9495 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9496 || declspecs
->decltype_p
)
9497 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9498 /* We might have ignored or rejected some of the qualifiers. */
9499 type_quals
= cp_type_quals (type
);
9502 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9503 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9504 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9506 storage_class
= declspecs
->storage_class
;
9507 if (storage_class
== sc_static
)
9508 staticp
= 1 + (decl_context
== FIELD
);
9510 if (virtualp
&& staticp
== 2)
9512 error ("member %qD cannot be declared both virtual and static", dname
);
9513 storage_class
= sc_none
;
9516 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9518 /* Issue errors about use of storage classes for parameters. */
9519 if (decl_context
== PARM
)
9523 error ("typedef declaration invalid in parameter declaration");
9524 return error_mark_node
;
9526 else if (template_parm_flag
&& storage_class
!= sc_none
)
9528 error ("storage class specified for template parameter %qs", name
);
9529 return error_mark_node
;
9531 else if (storage_class
== sc_static
9532 || storage_class
== sc_extern
9534 error ("storage class specifiers invalid in parameter declarations");
9536 /* Function parameters cannot be constexpr. If we saw one, moan
9537 and pretend it wasn't there. */
9540 error ("a parameter cannot be declared %<constexpr%>");
9545 /* Give error if `virtual' is used outside of class declaration. */
9547 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9549 error ("%<virtual%> outside class declaration");
9553 /* Static anonymous unions are dealt with here. */
9554 if (staticp
&& decl_context
== TYPENAME
9556 && ANON_AGGR_TYPE_P (declspecs
->type
))
9557 decl_context
= FIELD
;
9559 /* Warn about storage classes that are invalid for certain
9560 kinds of declarations (parameters, typenames, etc.). */
9563 && storage_class
!= sc_extern
9564 && storage_class
!= sc_static
)
9567 error ("multiple storage classes in declaration of %qs", name
);
9570 if (decl_context
!= NORMAL
9571 && ((storage_class
!= sc_none
9572 && storage_class
!= sc_mutable
)
9575 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9576 && (storage_class
== sc_register
9577 || storage_class
== sc_auto
))
9581 else if (decl_context
== FIELD
9582 /* C++ allows static class elements. */
9583 && storage_class
== sc_static
)
9584 /* C++ also allows inlines and signed and unsigned elements,
9585 but in those cases we don't come in here. */
9589 if (decl_context
== FIELD
)
9590 error ("storage class specified for %qs", name
);
9593 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9594 error ("storage class specified for parameter %qs", name
);
9596 error ("storage class specified for typename");
9598 if (storage_class
== sc_register
9599 || storage_class
== sc_auto
9600 || storage_class
== sc_extern
9602 storage_class
= sc_none
;
9605 else if (storage_class
== sc_extern
&& funcdef_flag
9606 && ! toplevel_bindings_p ())
9607 error ("nested function %qs declared %<extern%>", name
);
9608 else if (toplevel_bindings_p ())
9610 if (storage_class
== sc_auto
)
9611 error ("top-level declaration of %qs specifies %<auto%>", name
);
9614 && storage_class
!= sc_extern
9615 && storage_class
!= sc_static
)
9617 if (declspecs
->gnu_thread_keyword_p
)
9618 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9619 "declared %<__thread%>", name
);
9621 /* When thread_local is applied to a variable of block scope the
9622 storage-class-specifier static is implied if it does not appear
9624 storage_class
= declspecs
->storage_class
= sc_static
;
9628 if (storage_class
&& friendp
)
9630 error ("storage class specifiers invalid in friend function declarations");
9631 storage_class
= sc_none
;
9636 unqualified_id
= NULL_TREE
;
9639 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9640 switch (TREE_CODE (unqualified_id
))
9643 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9644 if (TYPE_P (unqualified_id
))
9645 unqualified_id
= constructor_name (unqualified_id
);
9648 case IDENTIFIER_NODE
:
9649 case TEMPLATE_ID_EXPR
:
9657 if (declspecs
->std_attributes
)
9659 /* Apply the c++11 attributes to the type preceding them. */
9660 input_location
= declspecs
->locations
[ds_std_attribute
];
9661 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9662 input_location
= saved_loc
;
9665 /* Determine the type of the entity declared by recurring on the
9667 for (; declarator
; declarator
= declarator
->declarator
)
9669 const cp_declarator
*inner_declarator
;
9672 if (type
== error_mark_node
)
9673 return error_mark_node
;
9675 attrs
= declarator
->attributes
;
9681 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9682 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9683 if (declarator
->kind
== cdk_function
)
9684 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9685 if (declarator
->kind
== cdk_array
)
9686 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9687 returned_attrs
= decl_attributes (&type
,
9688 chainon (returned_attrs
, attrs
),
9692 if (declarator
->kind
== cdk_id
)
9695 inner_declarator
= declarator
->declarator
;
9697 switch (declarator
->kind
)
9700 type
= create_array_type_for_decl (dname
, type
,
9701 declarator
->u
.array
.bounds
);
9702 if (declarator
->std_attributes
)
9705 The optional attribute-specifier-seq appertains to the
9707 returned_attrs
= chainon (returned_attrs
,
9708 declarator
->std_attributes
);
9716 /* Declaring a function type.
9717 Make sure we have a valid type for the function to return. */
9719 if (type_quals
!= TYPE_UNQUALIFIED
)
9721 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9722 warning (OPT_Wignored_qualifiers
,
9723 "type qualifiers ignored on function return type");
9724 /* We now know that the TYPE_QUALS don't apply to the
9725 decl, but to its return type. */
9726 type_quals
= TYPE_UNQUALIFIED
;
9728 errmsg
= targetm
.invalid_return_type (type
);
9732 type
= integer_type_node
;
9735 /* Error about some types functions can't return. */
9737 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9739 error ("%qs declared as function returning a function", name
);
9740 return error_mark_node
;
9742 if (TREE_CODE (type
) == ARRAY_TYPE
)
9744 error ("%qs declared as function returning an array", name
);
9745 return error_mark_node
;
9748 input_location
= declspecs
->locations
[ds_type_spec
];
9749 abstract_virtuals_error (ACU_RETURN
, type
);
9750 input_location
= saved_loc
;
9752 /* Pick up type qualifiers which should be applied to `this'. */
9753 memfn_quals
= declarator
->u
.function
.qualifiers
;
9754 /* Pick up virt-specifiers. */
9755 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9756 /* And ref-qualifier, too */
9757 rqual
= declarator
->u
.function
.ref_qualifier
;
9758 /* Pick up the exception specifications. */
9759 raises
= declarator
->u
.function
.exception_specification
;
9760 /* If the exception-specification is ill-formed, let's pretend
9761 there wasn't one. */
9762 if (raises
== error_mark_node
)
9765 /* Say it's a definition only for the CALL_EXPR
9766 closest to the identifier. */
9767 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9769 /* Handle a late-specified return type. */
9772 if (type_uses_auto (type
))
9774 if (!declarator
->u
.function
.late_return_type
)
9776 if (current_class_type
9777 && LAMBDA_TYPE_P (current_class_type
))
9778 /* OK for C++11 lambdas. */;
9779 else if (cxx_dialect
< cxx14
)
9781 error ("%qs function uses "
9782 "%<auto%> type specifier without trailing "
9783 "return type", name
);
9784 inform (input_location
, "deduced return type "
9785 "only available with -std=c++14 or "
9790 error ("virtual function cannot "
9791 "have deduced return type");
9795 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
9797 error ("%qs function with trailing return type has"
9798 " %qT as its type rather than plain %<auto%>",
9800 return error_mark_node
;
9803 else if (declarator
->u
.function
.late_return_type
9804 && sfk
!= sfk_conversion
)
9806 if (cxx_dialect
< cxx11
)
9807 /* Not using maybe_warn_cpp0x because this should
9808 always be an error. */
9809 error ("trailing return type only available with "
9810 "-std=c++11 or -std=gnu++11");
9812 error ("%qs function with trailing return type not "
9813 "declared with %<auto%> type specifier", name
);
9814 return error_mark_node
;
9817 type
= splice_late_return_type
9818 (type
, declarator
->u
.function
.late_return_type
);
9819 if (type
== error_mark_node
)
9820 return error_mark_node
;
9822 if (declarator
->u
.function
.late_return_type
)
9823 late_return_type_p
= true;
9825 if (ctype
== NULL_TREE
9826 && decl_context
== FIELD
9829 ctype
= current_class_type
;
9831 if (ctype
&& (sfk
== sfk_constructor
9832 || sfk
== sfk_destructor
))
9834 /* We are within a class's scope. If our declarator name
9835 is the same as the class name, and we are defining
9836 a function, then it is a constructor/destructor, and
9837 therefore returns a void type. */
9839 /* ISO C++ 12.4/2. A destructor may not be declared
9840 const or volatile. A destructor may not be static.
9841 A destructor may not be declared with ref-qualifier.
9843 ISO C++ 12.1. A constructor may not be declared
9844 const or volatile. A constructor may not be
9845 virtual. A constructor may not be static.
9846 A constructor may not be declared with ref-qualifier. */
9848 error ((flags
== DTOR_FLAG
)
9849 ? G_("destructor cannot be static member function")
9850 : G_("constructor cannot be static member function"));
9853 error ((flags
== DTOR_FLAG
)
9854 ? G_("destructors may not be cv-qualified")
9855 : G_("constructors may not be cv-qualified"));
9856 memfn_quals
= TYPE_UNQUALIFIED
;
9861 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9862 error ((flags
== DTOR_FLAG
)
9863 ? "destructors may not be ref-qualified"
9864 : "constructors may not be ref-qualified");
9865 rqual
= REF_QUAL_NONE
;
9868 if (decl_context
== FIELD
9869 && !member_function_or_else (ctype
,
9872 return error_mark_node
;
9874 if (flags
!= DTOR_FLAG
)
9876 /* It's a constructor. */
9881 permerror (input_location
, "constructors cannot be declared virtual");
9884 if (decl_context
== FIELD
9885 && sfk
!= sfk_constructor
)
9886 return error_mark_node
;
9888 if (decl_context
== FIELD
)
9895 /* Cannot be both friend and virtual. */
9896 error ("virtual functions cannot be friends");
9899 if (decl_context
== NORMAL
)
9900 error ("friend declaration not in class definition");
9901 if (current_function_decl
&& funcdef_flag
)
9902 error ("can%'t define friend function %qs in a local "
9906 else if (ctype
&& sfk
== sfk_conversion
)
9910 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9913 if (late_return_type_p
)
9914 error ("a conversion function cannot have a trailing return type");
9917 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9920 if (inner_declarator
9921 && inner_declarator
->kind
== cdk_id
9922 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9923 && arg_types
!= void_list_node
)
9925 error ("destructors may not have parameters");
9926 arg_types
= void_list_node
;
9930 type
= build_function_type (type
, arg_types
);
9931 if (declarator
->std_attributes
)
9934 The optional attribute-specifier-seq appertains to
9935 the function type. */
9936 decl_attributes (&type
, declarator
->std_attributes
,
9944 /* Filter out pointers-to-references and references-to-references.
9945 We can get these if a TYPE_DECL is used. */
9947 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9949 if (declarator
->kind
!= cdk_reference
)
9951 error ("cannot declare pointer to %q#T", type
);
9952 type
= TREE_TYPE (type
);
9955 /* In C++0x, we allow reference to reference declarations
9956 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9957 and template type arguments [14.3.1/4 temp.arg.type]. The
9958 check for direct reference to reference declarations, which
9959 are still forbidden, occurs below. Reasoning behind the change
9960 can be found in DR106, DR540, and the rvalue reference
9962 else if (cxx_dialect
== cxx98
)
9964 error ("cannot declare reference to %q#T", type
);
9965 type
= TREE_TYPE (type
);
9968 else if (VOID_TYPE_P (type
))
9970 if (declarator
->kind
== cdk_reference
)
9971 error ("cannot declare reference to %q#T", type
);
9972 else if (declarator
->kind
== cdk_ptrmem
)
9973 error ("cannot declare pointer to %q#T member", type
);
9976 /* We now know that the TYPE_QUALS don't apply to the decl,
9977 but to the target of the pointer. */
9978 type_quals
= TYPE_UNQUALIFIED
;
9980 /* This code used to handle METHOD_TYPE, but I don't think it's
9981 possible to get it here anymore. */
9982 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9983 if (declarator
->kind
== cdk_ptrmem
9984 && TREE_CODE (type
) == FUNCTION_TYPE
)
9986 memfn_quals
|= type_memfn_quals (type
);
9987 type
= build_memfn_type (type
,
9988 declarator
->u
.pointer
.class_type
,
9991 if (type
== error_mark_node
)
9992 return error_mark_node
;
9994 rqual
= REF_QUAL_NONE
;
9995 memfn_quals
= TYPE_UNQUALIFIED
;
9998 if (TREE_CODE (type
) == FUNCTION_TYPE
9999 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10000 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
10001 error (declarator
->kind
== cdk_reference
10002 ? G_("cannot declare reference to qualified function type %qT")
10003 : G_("cannot declare pointer to qualified function type %qT"),
10006 /* When the pointed-to type involves components of variable size,
10007 care must be taken to ensure that the size evaluation code is
10008 emitted early enough to dominate all the possible later uses
10009 and late enough for the variables on which it depends to have
10012 This is expected to happen automatically when the pointed-to
10013 type has a name/declaration of it's own, but special attention
10014 is required if the type is anonymous.
10016 We handle the NORMAL and FIELD contexts here by inserting a
10017 dummy statement that just evaluates the size at a safe point
10018 and ensures it is not deferred until e.g. within a deeper
10019 conditional context (c++/43555).
10021 We expect nothing to be needed here for PARM or TYPENAME.
10022 Evaluating the size at this point for TYPENAME would
10023 actually be incorrect, as we might be in the middle of an
10024 expression with side effects on the pointed-to type size
10025 "arguments" prior to the pointer declaration point and the
10026 size evaluation could end up prior to the side effects. */
10028 if (!TYPE_NAME (type
)
10029 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10030 && at_function_scope_p ()
10031 && variably_modified_type_p (type
, NULL_TREE
))
10032 /* Force evaluation of the SAVE_EXPR. */
10033 finish_expr_stmt (TYPE_SIZE (type
));
10035 if (declarator
->kind
== cdk_reference
)
10037 /* In C++0x, the type we are creating a reference to might be
10038 a typedef which is itself a reference type. In that case,
10039 we follow the reference collapsing rules in
10040 [7.1.3/8 dcl.typedef] to create the final reference type:
10042 "If a typedef TD names a type that is a reference to a type
10043 T, an attempt to create the type 'lvalue reference to cv TD'
10044 creates the type 'lvalue reference to T,' while an attempt
10045 to create the type "rvalue reference to cv TD' creates the
10048 if (VOID_TYPE_P (type
))
10049 /* We already gave an error. */;
10050 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10052 if (declarator
->u
.reference
.rvalue_ref
)
10053 /* Leave type alone. */;
10055 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10058 type
= cp_build_reference_type
10059 (type
, declarator
->u
.reference
.rvalue_ref
);
10061 /* In C++0x, we need this check for direct reference to
10062 reference declarations, which are forbidden by
10063 [8.3.2/5 dcl.ref]. Reference to reference declarations
10064 are only allowed indirectly through typedefs and template
10065 type arguments. Example:
10067 void foo(int & &); // invalid ref-to-ref decl
10069 typedef int & int_ref;
10070 void foo(int_ref &); // valid ref-to-ref decl
10072 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10073 error ("cannot declare reference to %q#T, which is not "
10074 "a typedef or a template type argument", type
);
10076 else if (TREE_CODE (type
) == METHOD_TYPE
)
10077 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10078 else if (declarator
->kind
== cdk_ptrmem
)
10080 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10081 != NAMESPACE_DECL
);
10082 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10083 /* We will already have complained. */
10084 type
= error_mark_node
;
10086 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10090 type
= build_pointer_type (type
);
10092 /* Process a list of type modifier keywords (such as
10093 const or volatile) that were given inside the `*' or `&'. */
10095 if (declarator
->u
.pointer
.qualifiers
)
10098 = cp_build_qualified_type (type
,
10099 declarator
->u
.pointer
.qualifiers
);
10100 type_quals
= cp_type_quals (type
);
10103 /* Apply C++11 attributes to the pointer, and not to the
10104 type pointed to. This is unlike what is done for GNU
10105 attributes above. It is to comply with [dcl.ptr]/1:
10107 [the optional attribute-specifier-seq (7.6.1) appertains
10108 to the pointer and not to the object pointed to]. */
10109 if (declarator
->std_attributes
)
10110 decl_attributes (&type
, declarator
->std_attributes
,
10120 gcc_unreachable ();
10124 /* A `constexpr' specifier used in an object declaration declares
10125 the object as `const'. */
10126 if (constexpr_p
&& innermost_code
!= cdk_function
)
10128 /* DR1688 says that a `constexpr' specifier in combination with
10129 `volatile' is valid. */
10131 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10133 type_quals
|= TYPE_QUAL_CONST
;
10134 type
= cp_build_qualified_type (type
, type_quals
);
10138 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10139 && TREE_CODE (type
) != FUNCTION_TYPE
10140 && TREE_CODE (type
) != METHOD_TYPE
10141 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10143 error ("template-id %qD used as a declarator",
10145 unqualified_id
= dname
;
10148 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10149 qualified with a class-name, turn it into a METHOD_TYPE, unless
10150 we know that the function is static. We take advantage of this
10151 opportunity to do other processing that pertains to entities
10152 explicitly declared to be class members. Note that if DECLARATOR
10153 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10154 would not have exited the loop above. */
10156 && declarator
->u
.id
.qualifying_scope
10157 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10159 ctype
= declarator
->u
.id
.qualifying_scope
;
10160 ctype
= TYPE_MAIN_VARIANT (ctype
);
10161 template_count
= num_template_headers_for_class (ctype
);
10163 if (ctype
== current_class_type
)
10167 permerror (input_location
, "member functions are implicitly friends of their class");
10171 permerror (declarator
->id_loc
,
10172 "extra qualification %<%T::%> on member %qs",
10175 else if (/* If the qualifying type is already complete, then we
10176 can skip the following checks. */
10177 !COMPLETE_TYPE_P (ctype
)
10178 && (/* If the function is being defined, then
10179 qualifying type must certainly be complete. */
10181 /* A friend declaration of "T::f" is OK, even if
10182 "T" is a template parameter. But, if this
10183 function is not a friend, the qualifying type
10184 must be a class. */
10185 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10186 /* For a declaration, the type need not be
10187 complete, if either it is dependent (since there
10188 is no meaningful definition of complete in that
10189 case) or the qualifying class is currently being
10191 || !(dependent_type_p (ctype
)
10192 || currently_open_class (ctype
)))
10193 /* Check that the qualifying type is complete. */
10194 && !complete_type_or_else (ctype
, NULL_TREE
))
10195 return error_mark_node
;
10196 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10198 if (current_class_type
10199 && (!friendp
|| funcdef_flag
))
10201 error (funcdef_flag
10202 ? G_("cannot define member function %<%T::%s%> "
10204 : G_("cannot declare member function %<%T::%s%> "
10206 ctype
, name
, current_class_type
);
10207 return error_mark_node
;
10210 else if (typedef_p
&& current_class_type
)
10212 error ("cannot declare member %<%T::%s%> within %qT",
10213 ctype
, name
, current_class_type
);
10214 return error_mark_node
;
10218 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10219 ctype
= current_class_type
;
10221 /* Now TYPE has the actual type. */
10223 if (returned_attrs
)
10226 *attrlist
= chainon (returned_attrs
, *attrlist
);
10228 attrlist
= &returned_attrs
;
10232 && declarator
->kind
== cdk_id
10233 && declarator
->std_attributes
)
10234 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10235 a declarator-id appertains to the entity that is declared. */
10236 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10238 /* Handle parameter packs. */
10239 if (parameter_pack_p
)
10241 if (decl_context
== PARM
)
10242 /* Turn the type into a pack expansion.*/
10243 type
= make_pack_expansion (type
);
10245 error ("non-parameter %qs cannot be a parameter pack", name
);
10248 /* Did array size calculations overflow or does the array cover more
10249 than half of the address-space? */
10250 if (TREE_CODE (type
) == ARRAY_TYPE
10251 && COMPLETE_TYPE_P (type
)
10252 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10253 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10255 error ("size of array %qs is too large", name
);
10256 /* If we proceed with the array type as it is, we'll eventually
10257 crash in tree_to_[su]hwi(). */
10258 type
= error_mark_node
;
10261 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10262 && !processing_template_decl
10263 && variably_modified_type_p (type
, NULL_TREE
))
10265 if (decl_context
== FIELD
)
10266 error ("data member may not have variably modified type %qT", type
);
10268 error ("parameter may not have variably modified type %qT", type
);
10269 type
= error_mark_node
;
10272 if (explicitp
== 1 || (explicitp
&& friendp
))
10274 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10275 in the declaration of a constructor or conversion function within
10276 a class definition. */
10277 if (!current_class_type
)
10278 error_at (declspecs
->locations
[ds_explicit
],
10279 "%<explicit%> outside class declaration");
10281 error_at (declspecs
->locations
[ds_explicit
],
10282 "%<explicit%> in friend declaration");
10284 error_at (declspecs
->locations
[ds_explicit
],
10285 "only declarations of constructors and conversion operators "
10286 "can be %<explicit%>");
10290 if (storage_class
== sc_mutable
)
10292 if (decl_context
!= FIELD
|| friendp
)
10294 error ("non-member %qs cannot be declared %<mutable%>", name
);
10295 storage_class
= sc_none
;
10297 else if (decl_context
== TYPENAME
|| typedef_p
)
10299 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10300 storage_class
= sc_none
;
10302 else if (TREE_CODE (type
) == FUNCTION_TYPE
10303 || TREE_CODE (type
) == METHOD_TYPE
)
10305 error ("function %qs cannot be declared %<mutable%>", name
);
10306 storage_class
= sc_none
;
10310 error ("static %qs cannot be declared %<mutable%>", name
);
10311 storage_class
= sc_none
;
10313 else if (type_quals
& TYPE_QUAL_CONST
)
10315 error ("const %qs cannot be declared %<mutable%>", name
);
10316 storage_class
= sc_none
;
10318 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10320 permerror (input_location
, "reference %qs cannot be declared "
10321 "%<mutable%>", name
);
10322 storage_class
= sc_none
;
10326 /* If this is declaring a typedef name, return a TYPE_DECL. */
10327 if (typedef_p
&& decl_context
!= TYPENAME
)
10331 /* Note that the grammar rejects storage classes
10332 in typenames, fields or parameters. */
10333 if (current_lang_name
== lang_name_java
)
10334 TYPE_FOR_JAVA (type
) = 1;
10336 /* This declaration:
10338 typedef void f(int) const;
10340 declares a function type which is not a member of any
10341 particular class, but which is cv-qualified; for
10342 example "f S::*" declares a pointer to a const-qualified
10343 member function of S. We record the cv-qualification in the
10345 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10347 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10349 /* We have now dealt with these qualifiers. */
10350 memfn_quals
= TYPE_UNQUALIFIED
;
10351 rqual
= REF_QUAL_NONE
;
10354 if (type_uses_auto (type
))
10356 error ("typedef declared %<auto%>");
10357 type
= error_mark_node
;
10360 if (decl_context
== FIELD
)
10361 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10363 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10364 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10365 error_at (DECL_SOURCE_LOCATION (decl
),
10366 "typedef name may not be a nested-name-specifier");
10367 TREE_TYPE (decl
) = error_mark_node
;
10370 if (decl_context
!= FIELD
)
10372 if (!current_function_decl
)
10373 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10374 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10375 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10376 (current_function_decl
)))
10377 /* The TYPE_DECL is "abstract" because there will be
10378 clones of this constructor/destructor, and there will
10379 be copies of this TYPE_DECL generated in those
10380 clones. The decloning optimization (for space) may
10381 revert this subsequently if it determines that
10382 the clones should share a common implementation. */
10383 DECL_ABSTRACT_P (decl
) = true;
10385 else if (current_class_type
10386 && constructor_name_p (unqualified_id
, current_class_type
))
10387 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10388 "as enclosing class",
10391 /* If the user declares "typedef struct {...} foo" then the
10392 struct will have an anonymous name. Fill that name in now.
10393 Nothing can refer to it, so nothing needs know about the name
10395 if (type
!= error_mark_node
10397 && TYPE_NAME (type
)
10398 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10399 && TYPE_ANONYMOUS_P (type
)
10400 && declspecs
->type_definition_p
10401 && attributes_naming_typedef_ok (*attrlist
)
10402 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10406 /* Replace the anonymous name with the real name everywhere. */
10407 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10409 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10410 /* We do not rename the debug info representing the
10411 anonymous tagged type because the standard says in
10412 [dcl.typedef] that the naming applies only for
10413 linkage purposes. */
10414 /*debug_hooks->set_name (t, decl);*/
10415 TYPE_NAME (t
) = decl
;
10418 if (TYPE_LANG_SPECIFIC (type
))
10419 TYPE_WAS_ANONYMOUS (type
) = 1;
10421 /* If this is a typedef within a template class, the nested
10422 type is a (non-primary) template. The name for the
10423 template needs updating as well. */
10424 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10425 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10426 = TYPE_IDENTIFIER (type
);
10428 /* Adjust linkage now that we aren't anonymous anymore. */
10429 reset_type_linkage (type
);
10431 /* FIXME remangle member functions; member functions of a
10432 type with external linkage have external linkage. */
10436 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10437 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10439 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10440 memfn_quals
!= TYPE_UNQUALIFIED
,
10441 inlinep
, friendp
, raises
!= NULL_TREE
);
10443 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10444 /* Acknowledge that this was written:
10445 `using analias = atype;'. */
10446 TYPE_DECL_ALIAS_P (decl
) = 1;
10451 /* Detect the case of an array type of unspecified size
10452 which came, as such, direct from a typedef name.
10453 We must copy the type, so that the array's domain can be
10454 individually set by the object's initializer. */
10456 if (type
&& typedef_type
10457 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10458 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10459 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10461 /* Detect where we're using a typedef of function type to declare a
10462 function. PARMS will not be set, so we must create it now. */
10464 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10466 tree decls
= NULL_TREE
;
10469 for (args
= TYPE_ARG_TYPES (type
);
10470 args
&& args
!= void_list_node
;
10471 args
= TREE_CHAIN (args
))
10473 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10475 DECL_CHAIN (decl
) = decls
;
10479 parms
= nreverse (decls
);
10481 if (decl_context
!= TYPENAME
)
10483 /* The qualifiers on the function type become the qualifiers on
10484 the non-static member function. */
10485 memfn_quals
|= type_memfn_quals (type
);
10486 rqual
= type_memfn_rqual (type
);
10487 type_quals
= TYPE_UNQUALIFIED
;
10491 /* If this is a type name (such as, in a cast or sizeof),
10492 compute the type and return it now. */
10494 if (decl_context
== TYPENAME
)
10496 /* Note that the grammar rejects storage classes
10497 in typenames, fields or parameters. */
10498 if (type_quals
!= TYPE_UNQUALIFIED
)
10499 type_quals
= TYPE_UNQUALIFIED
;
10501 /* Special case: "friend class foo" looks like a TYPENAME context. */
10504 if (type_quals
!= TYPE_UNQUALIFIED
)
10506 error ("type qualifiers specified for friend class declaration");
10507 type_quals
= TYPE_UNQUALIFIED
;
10511 error ("%<inline%> specified for friend class declaration");
10517 /* Don't allow friend declaration without a class-key. */
10518 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10519 permerror (input_location
, "template parameters cannot be friends");
10520 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10521 permerror (input_location
, "friend declaration requires class-key, "
10522 "i.e. %<friend class %T::%D%>",
10523 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10525 permerror (input_location
, "friend declaration requires class-key, "
10526 "i.e. %<friend %#T%>",
10530 /* Only try to do this stuff if we didn't already give up. */
10531 if (type
!= integer_type_node
)
10533 /* A friendly class? */
10534 if (current_class_type
)
10535 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10536 /*complain=*/true);
10538 error ("trying to make class %qT a friend of global scope",
10541 type
= void_type_node
;
10544 else if (memfn_quals
|| rqual
)
10546 if (ctype
== NULL_TREE
10547 && TREE_CODE (type
) == METHOD_TYPE
)
10548 ctype
= TYPE_METHOD_BASETYPE (type
);
10551 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10552 /* Core issue #547: need to allow this in template type args.
10553 Allow it in general in C++11 for alias-declarations. */
10554 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10555 && TREE_CODE (type
) == FUNCTION_TYPE
)
10556 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10558 error ("invalid qualifiers on non-member function type");
10563 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10564 && decl_context
!= CATCHPARM
10565 && TREE_CODE (type
) != UNION_TYPE
10568 error ("abstract declarator %qT used as declaration", type
);
10569 return error_mark_node
;
10572 /* Only functions may be declared using an operator-function-id. */
10574 && IDENTIFIER_OPNAME_P (unqualified_id
)
10575 && TREE_CODE (type
) != FUNCTION_TYPE
10576 && TREE_CODE (type
) != METHOD_TYPE
)
10578 error ("declaration of %qD as non-function", unqualified_id
);
10579 return error_mark_node
;
10582 /* We don't check parameter types here because we can emit a better
10583 error message later. */
10584 if (decl_context
!= PARM
)
10586 type
= check_var_type (unqualified_id
, type
);
10587 if (type
== error_mark_node
)
10588 return error_mark_node
;
10591 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10592 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10594 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10596 if (ctype
|| in_namespace
)
10597 error ("cannot use %<::%> in parameter declaration");
10599 if (type_uses_auto (type
))
10601 if (cxx_dialect
>= cxx14
)
10602 error ("%<auto%> parameter not permitted in this context");
10604 error ("parameter declared %<auto%>");
10605 type
= error_mark_node
;
10608 /* A parameter declared as an array of T is really a pointer to T.
10609 One declared as a function is really a pointer to a function.
10610 One declared as a member is really a pointer to member. */
10612 if (TREE_CODE (type
) == ARRAY_TYPE
)
10614 /* Transfer const-ness of array into that of type pointed to. */
10615 type
= build_pointer_type (TREE_TYPE (type
));
10616 type_quals
= TYPE_UNQUALIFIED
;
10617 array_parameter_p
= true;
10619 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10620 type
= build_pointer_type (type
);
10623 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10624 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10626 cp_cv_quals real_quals
= memfn_quals
;
10627 if (cxx_dialect
< cxx14
&& constexpr_p
10628 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10629 real_quals
|= TYPE_QUAL_CONST
;
10630 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10636 if (decl_context
== PARM
)
10638 decl
= cp_build_parm_decl (unqualified_id
, type
);
10639 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10641 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10642 memfn_quals
!= TYPE_UNQUALIFIED
,
10643 inlinep
, friendp
, raises
!= NULL_TREE
);
10645 else if (decl_context
== FIELD
)
10647 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10648 && type_uses_auto (type
))
10650 error ("non-static data member declared %<auto%>");
10651 type
= error_mark_node
;
10654 /* The C99 flexible array extension. */
10655 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10656 && TYPE_DOMAIN (type
) == NULL_TREE
)
10658 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10659 tf_warning_or_error
);
10660 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10663 if (type
== error_mark_node
)
10665 /* Happens when declaring arrays of sizes which
10666 are error_mark_node, for example. */
10669 else if (in_namespace
&& !friendp
)
10671 /* Something like struct S { int N::j; }; */
10672 error ("invalid use of %<::%>");
10673 return error_mark_node
;
10675 else if (TREE_CODE (type
) == FUNCTION_TYPE
10676 || TREE_CODE (type
) == METHOD_TYPE
)
10679 tree function_context
;
10683 /* This should never happen in pure C++ (the check
10684 could be an assert). It could happen in
10685 Objective-C++ if someone writes invalid code that
10686 uses a function declaration for an instance
10687 variable or property (instance variables and
10688 properties are parsed as FIELD_DECLs, but they are
10689 part of an Objective-C class, not a C++ class).
10690 That code is invalid and is caught by this
10694 error ("declaration of function %qD in invalid context",
10696 return error_mark_node
;
10699 /* ``A union may [ ... ] not [ have ] virtual functions.''
10701 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10703 error ("function %qD declared virtual inside a union",
10705 return error_mark_node
;
10708 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10712 error ("%qD cannot be declared virtual, since it "
10713 "is always static",
10720 /* Check that the name used for a destructor makes sense. */
10721 if (sfk
== sfk_destructor
)
10723 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10727 gcc_assert (friendp
);
10728 error ("expected qualified name in friend declaration "
10729 "for destructor %qD", uqname
);
10730 return error_mark_node
;
10733 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10735 error ("declaration of %qD as member of %qT",
10737 return error_mark_node
;
10741 error ("a destructor cannot be %<constexpr%>");
10742 return error_mark_node
;
10745 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10747 error ("expected qualified name in friend declaration "
10748 "for constructor %qD",
10749 id_declarator
->u
.id
.unqualified_name
);
10750 return error_mark_node
;
10753 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10755 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10756 if (variable_template_p (tmpl
))
10758 error ("specialization of variable template %qD "
10759 "declared as function", tmpl
);
10760 inform (DECL_SOURCE_LOCATION (tmpl
),
10761 "variable template declared here");
10762 return error_mark_node
;
10766 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10767 function_context
= (ctype
!= NULL_TREE
) ?
10768 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10769 publicp
= (! friendp
|| ! staticp
)
10770 && function_context
== NULL_TREE
;
10772 if (late_return_type_p
)
10773 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10775 decl
= grokfndecl (ctype
, type
,
10776 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10777 ? unqualified_id
: dname
,
10780 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10781 friendp
? -1 : 0, friendp
, publicp
,
10782 inlinep
| (2 * constexpr_p
),
10783 initialized
== SD_DELETED
, sfk
,
10784 funcdef_flag
, template_count
, in_namespace
,
10785 attrlist
, declarator
->id_loc
);
10786 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10787 if (decl
== NULL_TREE
)
10788 return error_mark_node
;
10790 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10791 /* The decl and setting of decl_attr is also turned off. */
10792 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10795 /* [class.conv.ctor]
10797 A constructor declared without the function-specifier
10798 explicit that can be called with a single parameter
10799 specifies a conversion from the type of its first
10800 parameter to the type of its class. Such a constructor
10801 is called a converting constructor. */
10802 if (explicitp
== 2)
10803 DECL_NONCONVERTING_P (decl
) = 1;
10805 else if (!staticp
&& !dependent_type_p (type
)
10806 && !COMPLETE_TYPE_P (complete_type (type
))
10807 && (TREE_CODE (type
) != ARRAY_TYPE
10808 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10809 || initialized
== 0))
10811 if (unqualified_id
)
10813 error ("field %qD has incomplete type %qT",
10814 unqualified_id
, type
);
10815 cxx_incomplete_type_inform (strip_array_types (type
));
10818 error ("name %qT has incomplete type", type
);
10820 type
= error_mark_node
;
10827 error ("%qE is neither function nor member function; "
10828 "cannot be declared friend", unqualified_id
);
10836 /* Friends are treated specially. */
10837 if (ctype
== current_class_type
)
10838 ; /* We already issued a permerror. */
10839 else if (decl
&& DECL_NAME (decl
))
10841 if (template_class_depth (current_class_type
) == 0)
10843 decl
= check_explicit_specialization
10844 (unqualified_id
, decl
, template_count
,
10845 2 * funcdef_flag
+ 4);
10846 if (decl
== error_mark_node
)
10847 return error_mark_node
;
10850 decl
= do_friend (ctype
, unqualified_id
, decl
,
10856 return error_mark_node
;
10859 /* Structure field. It may not be a function, except for C++. */
10861 if (decl
== NULL_TREE
)
10865 /* C++ allows static class members. All other work
10866 for this is done by grokfield. */
10867 decl
= build_lang_decl_loc (declarator
10868 ? declarator
->id_loc
10870 VAR_DECL
, unqualified_id
, type
);
10871 set_linkage_for_static_data_member (decl
);
10872 /* Even if there is an in-class initialization, DECL
10873 is considered undefined until an out-of-class
10874 definition is provided. */
10875 DECL_EXTERNAL (decl
) = 1;
10879 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10880 if (declspecs
->gnu_thread_keyword_p
)
10881 DECL_GNU_TLS_P (decl
) = true;
10884 if (constexpr_p
&& !initialized
)
10886 error ("constexpr static data member %qD must have an "
10887 "initializer", decl
);
10888 constexpr_p
= false;
10895 error ("non-static data member %qE declared %<constexpr%>",
10897 constexpr_p
= false;
10899 decl
= build_decl (input_location
,
10900 FIELD_DECL
, unqualified_id
, type
);
10901 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10902 if (bitfield
&& !unqualified_id
)
10903 TREE_NO_WARNING (decl
) = 1;
10905 if (storage_class
== sc_mutable
)
10907 DECL_MUTABLE_P (decl
) = 1;
10908 storage_class
= sc_none
;
10913 /* An attempt is being made to initialize a non-static
10914 member. This is new in C++11. */
10915 maybe_warn_cpp0x (CPP0X_NSDMI
);
10917 /* If this has been parsed with static storage class, but
10918 errors forced staticp to be cleared, ensure NSDMI is
10920 if (declspecs
->storage_class
== sc_static
)
10921 DECL_INITIAL (decl
) = error_mark_node
;
10925 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10926 memfn_quals
!= TYPE_UNQUALIFIED
,
10927 inlinep
, friendp
, raises
!= NULL_TREE
);
10930 else if (TREE_CODE (type
) == FUNCTION_TYPE
10931 || TREE_CODE (type
) == METHOD_TYPE
)
10933 tree original_name
;
10936 if (!unqualified_id
)
10937 return error_mark_node
;
10939 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10940 original_name
= dname
;
10942 original_name
= unqualified_id
;
10944 if (storage_class
== sc_auto
)
10945 error ("storage class %<auto%> invalid for function %qs", name
);
10946 else if (storage_class
== sc_register
)
10947 error ("storage class %<register%> invalid for function %qs", name
);
10950 if (declspecs
->gnu_thread_keyword_p
)
10951 error ("storage class %<__thread%> invalid for function %qs",
10954 error ("storage class %<thread_local%> invalid for function %qs",
10958 if (virt_specifiers
)
10959 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10960 /* Function declaration not at top level.
10961 Storage classes other than `extern' are not allowed
10962 and `extern' makes no difference. */
10963 if (! toplevel_bindings_p ()
10964 && (storage_class
== sc_static
10965 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10968 if (storage_class
== sc_static
)
10969 pedwarn (input_location
, OPT_Wpedantic
,
10970 "%<static%> specified invalid for function %qs "
10971 "declared out of global scope", name
);
10973 pedwarn (input_location
, OPT_Wpedantic
,
10974 "%<inline%> specifier invalid for function %qs "
10975 "declared out of global scope", name
);
10978 if (ctype
== NULL_TREE
)
10982 error ("virtual non-class function %qs", name
);
10985 else if (sfk
== sfk_constructor
10986 || sfk
== sfk_destructor
)
10988 error (funcdef_flag
10989 ? G_("%qs defined in a non-class scope")
10990 : G_("%qs declared in a non-class scope"), name
);
10995 /* Record whether the function is public. */
10996 publicp
= (ctype
!= NULL_TREE
10997 || storage_class
!= sc_static
);
10999 if (late_return_type_p
)
11000 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11002 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
11003 virtualp
, flags
, memfn_quals
, rqual
, raises
,
11005 publicp
, inlinep
| (2 * constexpr_p
),
11006 initialized
== SD_DELETED
, sfk
,
11008 template_count
, in_namespace
, attrlist
,
11009 declarator
->id_loc
);
11010 if (decl
== NULL_TREE
)
11011 return error_mark_node
;
11015 int invalid_static
= 0;
11017 /* Don't allow a static member function in a class, and forbid
11018 declaring main to be static. */
11019 if (TREE_CODE (type
) == METHOD_TYPE
)
11021 permerror (input_location
, "cannot declare member function %qD to have "
11022 "static linkage", decl
);
11023 invalid_static
= 1;
11025 else if (current_function_decl
)
11027 /* FIXME need arm citation */
11028 error ("cannot declare static function inside another function");
11029 invalid_static
= 1;
11032 if (invalid_static
)
11035 storage_class
= sc_none
;
11041 /* It's a variable. */
11043 /* An uninitialized decl with `extern' is a reference. */
11044 decl
= grokvardecl (type
, dname
, unqualified_id
,
11047 (type_quals
& TYPE_QUAL_CONST
) != 0,
11049 ctype
? ctype
: in_namespace
);
11050 if (decl
== NULL_TREE
)
11051 return error_mark_node
;
11053 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11054 memfn_quals
!= TYPE_UNQUALIFIED
,
11055 inlinep
, friendp
, raises
!= NULL_TREE
);
11059 DECL_CONTEXT (decl
) = ctype
;
11062 permerror (input_location
, "%<static%> may not be used when defining "
11063 "(as opposed to declaring) a static data member");
11065 storage_class
= sc_none
;
11067 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11069 error ("static member %qD declared %<register%>", decl
);
11070 storage_class
= sc_none
;
11072 if (storage_class
== sc_extern
&& pedantic
)
11074 pedwarn (input_location
, OPT_Wpedantic
,
11075 "cannot explicitly declare member %q#D to have "
11076 "extern linkage", decl
);
11077 storage_class
= sc_none
;
11080 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11082 error ("declaration of constexpr variable %qD is not a definition",
11084 constexpr_p
= false;
11088 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11090 if (toplevel_bindings_p ())
11092 /* It's common practice (and completely valid) to have a const
11093 be initialized and declared extern. */
11094 if (!(type_quals
& TYPE_QUAL_CONST
))
11095 warning (0, "%qs initialized and declared %<extern%>", name
);
11099 error ("%qs has both %<extern%> and initializer", name
);
11100 return error_mark_node
;
11104 /* Record `register' declaration for warnings on &
11105 and in case doing stupid register allocation. */
11107 if (storage_class
== sc_register
)
11108 DECL_REGISTER (decl
) = 1;
11109 else if (storage_class
== sc_extern
)
11110 DECL_THIS_EXTERN (decl
) = 1;
11111 else if (storage_class
== sc_static
)
11112 DECL_THIS_STATIC (decl
) = 1;
11114 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11115 if (constexpr_p
&& VAR_P (decl
))
11116 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11118 /* Record constancy and volatility on the DECL itself . There's
11119 no need to do this when processing a template; we'll do this
11120 for the instantiated declaration based on the type of DECL. */
11121 if (!processing_template_decl
)
11122 cp_apply_type_quals_to_decl (type_quals
, decl
);
11128 /* Subroutine of start_function. Ensure that each of the parameter
11129 types (as listed in PARMS) is complete, as is required for a
11130 function definition. */
11133 require_complete_types_for_parms (tree parms
)
11135 for (; parms
; parms
= DECL_CHAIN (parms
))
11137 if (dependent_type_p (TREE_TYPE (parms
)))
11139 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11140 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11142 relayout_decl (parms
);
11143 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11146 /* grokparms or complete_type_or_else will have already issued
11148 TREE_TYPE (parms
) = error_mark_node
;
11152 /* Returns nonzero if T is a local variable. */
11155 local_variable_p (const_tree t
)
11158 /* A VAR_DECL with a context that is a _TYPE is a static data
11160 && !TYPE_P (CP_DECL_CONTEXT (t
))
11161 /* Any other non-local variable must be at namespace scope. */
11162 && !DECL_NAMESPACE_SCOPE_P (t
))
11163 || (TREE_CODE (t
) == PARM_DECL
))
11169 /* Like local_variable_p, but suitable for use as a tree-walking
11173 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11176 if (local_variable_p (*tp
)
11177 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11179 else if (TYPE_P (*tp
))
11180 *walk_subtrees
= 0;
11185 /* Check that ARG, which is a default-argument expression for a
11186 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11187 something goes wrong. DECL may also be a _TYPE node, rather than a
11188 DECL, if there is no DECL available. */
11191 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11196 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11197 /* We get a DEFAULT_ARG when looking at an in-class declaration
11198 with a default argument. Ignore the argument for now; we'll
11199 deal with it after the class is complete. */
11208 decl_type
= TREE_TYPE (decl
);
11210 if (arg
== error_mark_node
11211 || decl
== error_mark_node
11212 || TREE_TYPE (arg
) == error_mark_node
11213 || decl_type
== error_mark_node
)
11214 /* Something already went wrong. There's no need to check
11216 return error_mark_node
;
11218 /* [dcl.fct.default]
11220 A default argument expression is implicitly converted to the
11222 ++cp_unevaluated_operand
;
11223 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11225 --cp_unevaluated_operand
;
11227 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11229 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11230 && null_ptr_cst_p (arg
))
11231 return nullptr_node
;
11233 /* [dcl.fct.default]
11235 Local variables shall not be used in default argument
11238 The keyword `this' shall not be used in a default argument of a
11239 member function. */
11240 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11243 if (complain
& tf_warning_or_error
)
11245 if (DECL_NAME (var
) == this_identifier
)
11246 permerror (input_location
, "default argument %qE uses %qD",
11249 error ("default argument %qE uses local variable %qD", arg
, var
);
11251 return error_mark_node
;
11258 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11261 type_is_deprecated (tree type
)
11263 enum tree_code code
;
11264 if (TREE_DEPRECATED (type
))
11266 if (TYPE_NAME (type
)
11267 && TREE_DEPRECATED (TYPE_NAME (type
)))
11270 /* Do warn about using typedefs to a deprecated class. */
11271 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11272 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11274 code
= TREE_CODE (type
);
11276 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11277 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11278 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11279 return type_is_deprecated (TREE_TYPE (type
));
11281 if (TYPE_PTRMEMFUNC_P (type
))
11282 return type_is_deprecated
11283 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11288 /* Decode the list of parameter types for a function type.
11289 Given the list of things declared inside the parens,
11290 return a list of types.
11292 If this parameter does not end with an ellipsis, we append
11295 *PARMS is set to the chain of PARM_DECLs created. */
11298 grokparms (tree parmlist
, tree
*parms
)
11300 tree result
= NULL_TREE
;
11301 tree decls
= NULL_TREE
;
11305 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11307 tree type
= NULL_TREE
;
11308 tree init
= TREE_PURPOSE (parm
);
11309 tree decl
= TREE_VALUE (parm
);
11310 const char *errmsg
;
11312 if (parm
== void_list_node
)
11315 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11318 type
= TREE_TYPE (decl
);
11319 if (VOID_TYPE_P (type
))
11321 if (same_type_p (type
, void_type_node
)
11323 && !DECL_NAME (decl
) && !result
11324 && TREE_CHAIN (parm
) == void_list_node
)
11325 /* DR 577: A parameter list consisting of a single
11326 unnamed parameter of non-dependent type 'void'. */
11328 else if (cv_qualified_p (type
))
11329 error_at (DECL_SOURCE_LOCATION (decl
),
11330 "invalid use of cv-qualified type %qT in "
11331 "parameter declaration", type
);
11333 error_at (DECL_SOURCE_LOCATION (decl
),
11334 "invalid use of type %<void%> in parameter "
11336 /* It's not a good idea to actually create parameters of
11337 type `void'; other parts of the compiler assume that a
11338 void type terminates the parameter list. */
11339 type
= error_mark_node
;
11340 TREE_TYPE (decl
) = error_mark_node
;
11343 if (type
!= error_mark_node
11344 && TYPE_FOR_JAVA (type
)
11345 && MAYBE_CLASS_TYPE_P (type
))
11347 error ("parameter %qD has Java class type", decl
);
11348 type
= error_mark_node
;
11349 TREE_TYPE (decl
) = error_mark_node
;
11353 if (type
!= error_mark_node
11354 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11357 type
= error_mark_node
;
11358 TREE_TYPE (decl
) = error_mark_node
;
11361 if (type
!= error_mark_node
)
11363 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11365 tree deptype
= type_is_deprecated (type
);
11367 warn_deprecated_use (deptype
, NULL_TREE
);
11370 /* Top-level qualifiers on the parameters are
11371 ignored for function types. */
11372 type
= cp_build_qualified_type (type
, 0);
11373 if (TREE_CODE (type
) == METHOD_TYPE
)
11375 error ("parameter %qD invalidly declared method type", decl
);
11376 type
= build_pointer_type (type
);
11377 TREE_TYPE (decl
) = type
;
11379 else if (abstract_virtuals_error (decl
, type
))
11380 any_error
= 1; /* Seems like a good idea. */
11381 else if (POINTER_TYPE_P (type
))
11383 /* [dcl.fct]/6, parameter types cannot contain pointers
11384 (references) to arrays of unknown bound. */
11385 tree t
= TREE_TYPE (type
);
11386 int ptr
= TYPE_PTR_P (type
);
11390 if (TYPE_PTR_P (t
))
11392 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11394 else if (!TYPE_DOMAIN (t
))
11398 if (TREE_CODE (t
) == ARRAY_TYPE
)
11400 ? G_("parameter %qD includes pointer to array of "
11401 "unknown bound %qT")
11402 : G_("parameter %qD includes reference to array of "
11403 "unknown bound %qT"),
11409 else if (init
&& !processing_template_decl
)
11410 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11413 DECL_CHAIN (decl
) = decls
;
11415 result
= tree_cons (init
, type
, result
);
11417 decls
= nreverse (decls
);
11418 result
= nreverse (result
);
11420 result
= chainon (result
, void_list_node
);
11427 /* D is a constructor or overloaded `operator='.
11429 Let T be the class in which D is declared. Then, this function
11432 -1 if D's is an ill-formed constructor or copy assignment operator
11433 whose first parameter is of type `T'.
11434 0 if D is not a copy constructor or copy assignment
11436 1 if D is a copy constructor or copy assignment operator whose
11437 first parameter is a reference to non-const qualified T.
11438 2 if D is a copy constructor or copy assignment operator whose
11439 first parameter is a reference to const qualified T.
11441 This function can be used as a predicate. Positive values indicate
11442 a copy constructor and nonzero values indicate a copy assignment
11446 copy_fn_p (const_tree d
)
11452 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11454 if (TREE_CODE (d
) == TEMPLATE_DECL
11455 || (DECL_TEMPLATE_INFO (d
)
11456 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11457 /* Instantiations of template member functions are never copy
11458 functions. Note that member functions of templated classes are
11459 represented as template functions internally, and we must
11460 accept those as copy functions. */
11463 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11467 arg_type
= TREE_VALUE (args
);
11468 if (arg_type
== error_mark_node
)
11471 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11473 /* Pass by value copy assignment operator. */
11476 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11477 && !TYPE_REF_IS_RVALUE (arg_type
)
11478 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11480 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11486 args
= TREE_CHAIN (args
);
11488 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11489 /* There are more non-optional args. */
11495 /* D is a constructor or overloaded `operator='.
11497 Let T be the class in which D is declared. Then, this function
11498 returns true when D is a move constructor or move assignment
11499 operator, false otherwise. */
11502 move_fn_p (const_tree d
)
11504 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11506 if (cxx_dialect
== cxx98
)
11507 /* There are no move constructors if we are in C++98 mode. */
11510 if (TREE_CODE (d
) == TEMPLATE_DECL
11511 || (DECL_TEMPLATE_INFO (d
)
11512 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11513 /* Instantiations of template member functions are never move
11514 functions. Note that member functions of templated classes are
11515 represented as template functions internally, and we must
11516 accept those as move functions. */
11519 return move_signature_fn_p (d
);
11522 /* D is a constructor or overloaded `operator='.
11524 Then, this function returns true when D has the same signature as a move
11525 constructor or move assignment operator (because either it is such a
11526 ctor/op= or it is a template specialization with the same signature),
11527 false otherwise. */
11530 move_signature_fn_p (const_tree d
)
11534 bool result
= false;
11536 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11540 arg_type
= TREE_VALUE (args
);
11541 if (arg_type
== error_mark_node
)
11544 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11545 && TYPE_REF_IS_RVALUE (arg_type
)
11546 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11550 args
= TREE_CHAIN (args
);
11552 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11553 /* There are more non-optional args. */
11559 /* Remember any special properties of member function DECL. */
11562 grok_special_member_properties (tree decl
)
11566 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11569 class_type
= DECL_CONTEXT (decl
);
11570 if (DECL_CONSTRUCTOR_P (decl
))
11572 int ctor
= copy_fn_p (decl
);
11574 if (!DECL_ARTIFICIAL (decl
))
11575 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11581 A non-template constructor for class X is a copy
11582 constructor if its first parameter is of type X&, const
11583 X&, volatile X& or const volatile X&, and either there
11584 are no other parameters or else all other parameters have
11585 default arguments. */
11586 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11587 if (user_provided_p (decl
))
11588 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11590 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11592 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11593 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11594 else if (move_fn_p (decl
) && user_provided_p (decl
))
11595 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11596 else if (is_list_ctor (decl
))
11597 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11599 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11600 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11601 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11603 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11607 A non-template assignment operator for class X is a copy
11608 assignment operator if its parameter is of type X, X&, const
11609 X&, volatile X& or const volatile X&. */
11611 int assop
= copy_fn_p (decl
);
11615 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11616 if (user_provided_p (decl
))
11617 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11619 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11621 else if (move_fn_p (decl
) && user_provided_p (decl
))
11622 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11624 /* Destructors are handled in check_methods. */
11627 /* Check a constructor DECL has the correct form. Complains
11628 if the class has a constructor of the form X(X). */
11631 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11633 int ctor_parm
= copy_fn_p (decl
);
11639 A declaration of a constructor for a class X is ill-formed if
11640 its first parameter is of type (optionally cv-qualified) X
11641 and either there are no other parameters or else all other
11642 parameters have default arguments.
11644 We *don't* complain about member template instantiations that
11645 have this form, though; they can occur as we try to decide
11646 what constructor to use during overload resolution. Since
11647 overload resolution will never prefer such a constructor to
11648 the non-template copy constructor (which is either explicitly
11649 or implicitly defined), there's no need to worry about their
11650 existence. Theoretically, they should never even be
11651 instantiated, but that's hard to forestall. */
11652 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11660 /* An operator with this code is unary, but can also be binary. */
11663 ambi_op_p (enum tree_code code
)
11665 return (code
== INDIRECT_REF
11666 || code
== ADDR_EXPR
11667 || code
== UNARY_PLUS_EXPR
11668 || code
== NEGATE_EXPR
11669 || code
== PREINCREMENT_EXPR
11670 || code
== PREDECREMENT_EXPR
);
11673 /* An operator with this name can only be unary. */
11676 unary_op_p (enum tree_code code
)
11678 return (code
== TRUTH_NOT_EXPR
11679 || code
== BIT_NOT_EXPR
11680 || code
== COMPONENT_REF
11681 || code
== TYPE_EXPR
);
11684 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11685 errors are issued for invalid declarations. */
11688 grok_op_properties (tree decl
, bool complain
)
11690 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11692 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11693 tree name
= DECL_NAME (decl
);
11694 enum tree_code operator_code
;
11699 /* Count the number of arguments and check for ellipsis. */
11700 for (argtype
= argtypes
, arity
= 0;
11701 argtype
&& argtype
!= void_list_node
;
11702 argtype
= TREE_CHAIN (argtype
))
11704 ellipsis_p
= !argtype
;
11706 class_type
= DECL_CONTEXT (decl
);
11707 if (class_type
&& !CLASS_TYPE_P (class_type
))
11708 class_type
= NULL_TREE
;
11710 if (DECL_CONV_FN_P (decl
))
11711 operator_code
= TYPE_EXPR
;
11715 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11716 if (ansi_opname (CODE) == name) \
11718 operator_code = (CODE); \
11721 else if (ansi_assopname (CODE) == name) \
11723 operator_code = (CODE); \
11724 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11728 #include "operators.def"
11729 #undef DEF_OPERATOR
11731 gcc_unreachable ();
11734 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11735 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11738 switch (operator_code
)
11741 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11745 TYPE_GETS_DELETE (class_type
) |= 1;
11749 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11752 case VEC_DELETE_EXPR
:
11753 TYPE_GETS_DELETE (class_type
) |= 2;
11760 /* [basic.std.dynamic.allocation]/1:
11762 A program is ill-formed if an allocation function is declared
11763 in a namespace scope other than global scope or declared static
11766 The same also holds true for deallocation functions. */
11767 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11768 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11770 if (DECL_NAMESPACE_SCOPE_P (decl
))
11772 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11774 error ("%qD may not be declared within a namespace", decl
);
11777 else if (!TREE_PUBLIC (decl
))
11779 error ("%qD may not be declared as static", decl
);
11785 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11787 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11788 DECL_IS_OPERATOR_NEW (decl
) = 1;
11790 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11791 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11794 /* An operator function must either be a non-static member function
11795 or have at least one parameter of a class, a reference to a class,
11796 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11797 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11799 if (operator_code
== TYPE_EXPR
11800 || operator_code
== CALL_EXPR
11801 || operator_code
== COMPONENT_REF
11802 || operator_code
== ARRAY_REF
11803 || operator_code
== NOP_EXPR
)
11805 error ("%qD must be a nonstatic member function", decl
);
11812 if (DECL_STATIC_FUNCTION_P (decl
))
11814 error ("%qD must be either a non-static member "
11815 "function or a non-member function", decl
);
11819 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11821 tree arg
= non_reference (TREE_VALUE (p
));
11822 if (arg
== error_mark_node
)
11825 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11826 because these checks are performed even on
11827 template functions. */
11828 if (MAYBE_CLASS_TYPE_P (arg
)
11829 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11833 if (!p
|| p
== void_list_node
)
11836 error ("%qD must have an argument of class or "
11837 "enumerated type", decl
);
11843 /* There are no restrictions on the arguments to an overloaded
11845 if (operator_code
== CALL_EXPR
)
11848 /* Warn about conversion operators that will never be used. */
11849 if (IDENTIFIER_TYPENAME_P (name
)
11850 && ! DECL_TEMPLATE_INFO (decl
)
11852 /* Warn only declaring the function; there is no need to
11853 warn again about out-of-class definitions. */
11854 && class_type
== current_class_type
)
11856 tree t
= TREE_TYPE (name
);
11857 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11860 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11862 if (VOID_TYPE_P (t
))
11863 warning (OPT_Wconversion
,
11865 ? G_("conversion to a reference to void "
11866 "will never use a type conversion operator")
11867 : G_("conversion to void "
11868 "will never use a type conversion operator"));
11869 else if (class_type
)
11871 if (t
== class_type
)
11872 warning (OPT_Wconversion
,
11874 ? G_("conversion to a reference to the same type "
11875 "will never use a type conversion operator")
11876 : G_("conversion to the same type "
11877 "will never use a type conversion operator"));
11878 /* Don't force t to be complete here. */
11879 else if (MAYBE_CLASS_TYPE_P (t
)
11880 && COMPLETE_TYPE_P (t
)
11881 && DERIVED_FROM_P (t
, class_type
))
11882 warning (OPT_Wconversion
,
11884 ? G_("conversion to a reference to a base class "
11885 "will never use a type conversion operator")
11886 : G_("conversion to a base class "
11887 "will never use a type conversion operator"));
11892 if (operator_code
== COND_EXPR
)
11895 error ("ISO C++ prohibits overloading operator ?:");
11898 else if (ellipsis_p
)
11900 error ("%qD must not have variable number of arguments", decl
);
11903 else if (ambi_op_p (operator_code
))
11906 /* We pick the one-argument operator codes by default, so
11907 we don't have to change anything. */
11909 else if (arity
== 2)
11911 /* If we thought this was a unary operator, we now know
11912 it to be a binary operator. */
11913 switch (operator_code
)
11916 operator_code
= MULT_EXPR
;
11920 operator_code
= BIT_AND_EXPR
;
11923 case UNARY_PLUS_EXPR
:
11924 operator_code
= PLUS_EXPR
;
11928 operator_code
= MINUS_EXPR
;
11931 case PREINCREMENT_EXPR
:
11932 operator_code
= POSTINCREMENT_EXPR
;
11935 case PREDECREMENT_EXPR
:
11936 operator_code
= POSTDECREMENT_EXPR
;
11940 gcc_unreachable ();
11943 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11945 if ((operator_code
== POSTINCREMENT_EXPR
11946 || operator_code
== POSTDECREMENT_EXPR
)
11947 && ! processing_template_decl
11948 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11951 error ("postfix %qD must take %<int%> as its argument",
11954 error ("postfix %qD must take %<int%> as its second "
11962 error ("%qD must take either zero or one argument", decl
);
11964 error ("%qD must take either one or two arguments", decl
);
11968 /* More Effective C++ rule 6. */
11970 && (operator_code
== POSTINCREMENT_EXPR
11971 || operator_code
== POSTDECREMENT_EXPR
11972 || operator_code
== PREINCREMENT_EXPR
11973 || operator_code
== PREDECREMENT_EXPR
))
11975 tree arg
= TREE_VALUE (argtypes
);
11976 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11977 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11978 arg
= TREE_TYPE (arg
);
11979 arg
= TYPE_MAIN_VARIANT (arg
);
11980 if (operator_code
== PREINCREMENT_EXPR
11981 || operator_code
== PREDECREMENT_EXPR
)
11983 if (TREE_CODE (ret
) != REFERENCE_TYPE
11984 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11986 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11987 build_reference_type (arg
));
11991 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11992 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11996 else if (unary_op_p (operator_code
))
12001 error ("%qD must take %<void%>", decl
);
12003 error ("%qD must take exactly one argument", decl
);
12007 else /* if (binary_op_p (operator_code)) */
12012 error ("%qD must take exactly one argument", decl
);
12014 error ("%qD must take exactly two arguments", decl
);
12018 /* More Effective C++ rule 7. */
12020 && (operator_code
== TRUTH_ANDIF_EXPR
12021 || operator_code
== TRUTH_ORIF_EXPR
12022 || operator_code
== COMPOUND_EXPR
))
12023 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12027 /* Effective C++ rule 23. */
12030 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12031 && (operator_code
== PLUS_EXPR
12032 || operator_code
== MINUS_EXPR
12033 || operator_code
== TRUNC_DIV_EXPR
12034 || operator_code
== MULT_EXPR
12035 || operator_code
== TRUNC_MOD_EXPR
)
12036 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12037 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12039 /* [over.oper]/8 */
12040 for (; argtypes
&& argtypes
!= void_list_node
;
12041 argtypes
= TREE_CHAIN (argtypes
))
12042 if (TREE_PURPOSE (argtypes
))
12044 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12045 if (operator_code
== POSTINCREMENT_EXPR
12046 || operator_code
== POSTDECREMENT_EXPR
)
12048 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12053 error ("%qD cannot have default arguments", decl
);
12061 /* Return a string giving the keyword associate with CODE. */
12063 static const char *
12064 tag_name (enum tag_types code
)
12076 case typename_type
:
12079 gcc_unreachable ();
12083 /* Name lookup in an elaborated-type-specifier (after the keyword
12084 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12085 elaborated-type-specifier is invalid, issue a diagnostic and return
12086 error_mark_node; otherwise, return the *_TYPE to which it referred.
12087 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12090 check_elaborated_type_specifier (enum tag_types tag_code
,
12092 bool allow_template_p
)
12098 struct S { struct S *p; };
12100 name lookup will find the TYPE_DECL for the implicit "S::S"
12101 typedef. Adjust for that here. */
12102 if (DECL_SELF_REFERENCE_P (decl
))
12103 decl
= TYPE_NAME (TREE_TYPE (decl
));
12105 type
= TREE_TYPE (decl
);
12107 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12108 is false for this case as well. */
12109 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12111 error ("using template type parameter %qT after %qs",
12112 type
, tag_name (tag_code
));
12113 return error_mark_node
;
12115 /* Accept template template parameters. */
12116 else if (allow_template_p
12117 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12118 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12122 If the identifier resolves to a typedef-name or the
12123 simple-template-id resolves to an alias template
12124 specialization, the elaborated-type-specifier is ill-formed.
12126 In other words, the only legitimate declaration to use in the
12127 elaborated type specifier is the implicit typedef created when
12128 the type is declared. */
12129 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12130 && !DECL_SELF_REFERENCE_P (decl
)
12131 && tag_code
!= typename_type
)
12133 if (alias_template_specialization_p (type
))
12134 error ("using alias template specialization %qT after %qs",
12135 type
, tag_name (tag_code
));
12137 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12138 inform (DECL_SOURCE_LOCATION (decl
),
12139 "%qD has a previous declaration here", decl
);
12140 return error_mark_node
;
12142 else if (TREE_CODE (type
) != RECORD_TYPE
12143 && TREE_CODE (type
) != UNION_TYPE
12144 && tag_code
!= enum_type
12145 && tag_code
!= typename_type
)
12147 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12148 inform (input_location
, "%q+T has a previous declaration here", type
);
12149 return error_mark_node
;
12151 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12152 && tag_code
== enum_type
)
12154 error ("%qT referred to as enum", type
);
12155 inform (input_location
, "%q+T has a previous declaration here", type
);
12156 return error_mark_node
;
12158 else if (!allow_template_p
12159 && TREE_CODE (type
) == RECORD_TYPE
12160 && CLASSTYPE_IS_TEMPLATE (type
))
12162 /* If a class template appears as elaborated type specifier
12163 without a template header such as:
12165 template <class T> class C {};
12166 void f(class C); // No template header here
12168 then the required template argument is missing. */
12169 error ("template argument required for %<%s %T%>",
12170 tag_name (tag_code
),
12171 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12172 return error_mark_node
;
12178 /* Lookup NAME in elaborate type specifier in scope according to
12179 SCOPE and issue diagnostics if necessary.
12180 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12181 found, and ERROR_MARK_NODE for type error. */
12184 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12185 tag_scope scope
, bool template_header_p
)
12189 if (scope
== ts_global
)
12191 /* First try ordinary name lookup, ignoring hidden class name
12192 injected via friend declaration. */
12193 decl
= lookup_name_prefer_type (name
, 2);
12194 decl
= strip_using_decl (decl
);
12195 /* If that fails, the name will be placed in the smallest
12196 non-class, non-function-prototype scope according to 3.3.1/5.
12197 We may already have a hidden name declared as friend in this
12198 scope. So lookup again but not ignoring hidden names.
12199 If we find one, that name will be made visible rather than
12200 creating a new tag. */
12202 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12205 decl
= lookup_type_scope (name
, scope
);
12208 && (DECL_CLASS_TEMPLATE_P (decl
)
12209 /* If scope is ts_current we're defining a class, so ignore a
12210 template template parameter. */
12211 || (scope
!= ts_current
12212 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12213 decl
= DECL_TEMPLATE_RESULT (decl
);
12215 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12217 /* Look for invalid nested type:
12221 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12223 error ("%qD has the same name as the class in which it is "
12226 return error_mark_node
;
12229 /* Two cases we need to consider when deciding if a class
12230 template is allowed as an elaborated type specifier:
12231 1. It is a self reference to its own class.
12232 2. It comes with a template header.
12236 template <class T> class C {
12237 class C *c1; // DECL_SELF_REFERENCE_P is true
12240 template <class U> class C; // template_header_p is true
12241 template <class T> class C<T>::D {
12242 class C *c2; // DECL_SELF_REFERENCE_P is true
12245 t
= check_elaborated_type_specifier (tag_code
,
12248 | DECL_SELF_REFERENCE_P (decl
));
12251 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12253 error ("reference to %qD is ambiguous", name
);
12254 print_candidates (decl
);
12255 return error_mark_node
;
12261 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12262 Define the tag as a forward-reference if it is not defined.
12264 If a declaration is given, process it here, and report an error if
12265 multiple declarations are not identical.
12267 SCOPE is TS_CURRENT when this is also a definition. Only look in
12268 the current frame for the name (since C++ allows new names in any
12269 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12270 declaration. Only look beginning from the current scope outward up
12271 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12273 TEMPLATE_HEADER_P is true when this declaration is preceded by
12274 a set of template parameters. */
12277 xref_tag_1 (enum tag_types tag_code
, tree name
,
12278 tag_scope orig_scope
, bool template_header_p
)
12280 enum tree_code code
;
12282 tree context
= NULL_TREE
;
12285 gcc_assert (identifier_p (name
));
12291 code
= RECORD_TYPE
;
12297 code
= ENUMERAL_TYPE
;
12300 gcc_unreachable ();
12303 if (orig_scope
== ts_lambda
)
12304 scope
= ts_current
;
12306 scope
= orig_scope
;
12308 /* In case of anonymous name, xref_tag is only called to
12309 make type node and push name. Name lookup is not required. */
12310 if (ANON_AGGRNAME_P (name
))
12313 t
= lookup_and_check_tag (tag_code
, name
,
12314 scope
, template_header_p
);
12316 if (t
== error_mark_node
)
12317 return error_mark_node
;
12319 if (scope
!= ts_current
&& t
&& current_class_type
12320 && template_class_depth (current_class_type
)
12321 && template_header_p
)
12323 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12326 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12327 definition of this tag. Since, in addition, we are currently
12328 processing a (member) template declaration of a template
12329 class, we must be very careful; consider:
12336 { template <class V>
12337 friend struct S1; };
12339 Here, the S2::S1 declaration should not be confused with the
12340 outer declaration. In particular, the inner version should
12341 have a template parameter of level 2, not level 1. This
12342 would be particularly important if the member declaration
12345 template <class V = U> friend struct S1;
12347 say, when we should tsubst into `U' when instantiating
12348 S2. On the other hand, when presented with:
12358 we must find the inner binding eventually. We
12359 accomplish this by making sure that the new type we
12360 create to represent this declaration has the right
12362 context
= TYPE_CONTEXT (t
);
12368 /* If no such tag is yet defined, create a forward-reference node
12369 and record it as the "definition".
12370 When a real declaration of this type is found,
12371 the forward-reference will be altered into a real type. */
12372 if (code
== ENUMERAL_TYPE
)
12374 error ("use of enum %q#D without previous declaration", name
);
12375 return error_mark_node
;
12379 t
= make_class_type (code
);
12380 TYPE_CONTEXT (t
) = context
;
12381 if (orig_scope
== ts_lambda
)
12382 /* Remember that we're declaring a lambda to avoid bogus errors
12383 in push_template_decl. */
12384 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12385 t
= pushtag (name
, t
, scope
);
12390 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12392 if (!redeclare_class_template (t
, current_template_parms
))
12393 return error_mark_node
;
12395 else if (!processing_template_decl
12396 && CLASS_TYPE_P (t
)
12397 && CLASSTYPE_IS_TEMPLATE (t
))
12399 error ("redeclaration of %qT as a non-template", t
);
12400 error ("previous declaration %q+D", t
);
12401 return error_mark_node
;
12404 /* Make injected friend class visible. */
12405 if (scope
!= ts_within_enclosing_non_class
12406 && hidden_name_p (TYPE_NAME (t
)))
12408 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12409 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12411 if (TYPE_TEMPLATE_INFO (t
))
12413 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12414 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12422 /* Wrapper for xref_tag_1. */
12425 xref_tag (enum tag_types tag_code
, tree name
,
12426 tag_scope scope
, bool template_header_p
)
12430 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12431 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12432 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12438 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12440 enum tag_types tag_kind
;
12442 if (TREE_CODE (old
) == RECORD_TYPE
)
12443 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12445 tag_kind
= union_type
;
12447 if (id
== NULL_TREE
)
12448 id
= TYPE_IDENTIFIER (old
);
12450 return xref_tag (tag_kind
, id
, scope
, false);
12453 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12454 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12455 access_* node, and the TREE_VALUE is the type of the base-class.
12456 Non-NULL TREE_TYPE indicates virtual inheritance.
12458 Returns true if the binfo hierarchy was successfully created,
12459 false if an error was detected. */
12462 xref_basetypes (tree ref
, tree base_list
)
12465 tree binfo
, base_binfo
;
12466 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12467 unsigned max_bases
= 0; /* Maximum direct bases. */
12469 tree default_access
;
12470 tree igo_prev
; /* Track Inheritance Graph Order. */
12472 if (ref
== error_mark_node
)
12475 /* The base of a derived class is private by default, all others are
12477 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12478 && CLASSTYPE_DECLARED_CLASS (ref
)
12479 ? access_private_node
: access_public_node
);
12481 /* First, make sure that any templates in base-classes are
12482 instantiated. This ensures that if we call ourselves recursively
12483 we do not get confused about which classes are marked and which
12485 basep
= &base_list
;
12488 tree basetype
= TREE_VALUE (*basep
);
12490 /* The dependent_type_p call below should really be dependent_scope_p
12491 so that we give a hard error about using an incomplete type as a
12492 base, but we allow it with a pedwarn for backward
12494 if (processing_template_decl
12495 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12496 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12497 if (!dependent_type_p (basetype
)
12498 && !complete_type_or_else (basetype
, NULL
))
12499 /* An incomplete type. Remove it from the list. */
12500 *basep
= TREE_CHAIN (*basep
);
12504 if (TREE_TYPE (*basep
))
12506 if (CLASS_TYPE_P (basetype
))
12507 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12508 basep
= &TREE_CHAIN (*basep
);
12512 TYPE_MARKED_P (ref
) = 1;
12514 /* The binfo slot should be empty, unless this is an (ill-formed)
12516 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12518 error ("redefinition of %q#T", ref
);
12522 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12524 binfo
= make_tree_binfo (max_bases
);
12526 TYPE_BINFO (ref
) = binfo
;
12527 BINFO_OFFSET (binfo
) = size_zero_node
;
12528 BINFO_TYPE (binfo
) = ref
;
12530 /* Apply base-class info set up to the variants of this type. */
12531 fixup_type_variants (ref
);
12535 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12536 /* An aggregate cannot have baseclasses. */
12537 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12539 if (TREE_CODE (ref
) == UNION_TYPE
)
12541 error ("derived union %qT invalid", ref
);
12548 if (TYPE_FOR_JAVA (ref
))
12550 error ("Java class %qT cannot have multiple bases", ref
);
12557 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12559 if (TYPE_FOR_JAVA (ref
))
12561 error ("Java class %qT cannot have virtual bases", ref
);
12566 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12568 tree access
= TREE_PURPOSE (base_list
);
12569 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12570 tree basetype
= TREE_VALUE (base_list
);
12572 if (access
== access_default_node
)
12573 access
= default_access
;
12575 if (PACK_EXPANSION_P (basetype
))
12576 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12577 if (TREE_CODE (basetype
) == TYPE_DECL
)
12578 basetype
= TREE_TYPE (basetype
);
12579 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12581 error ("base type %qT fails to be a struct or class type",
12586 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12587 TYPE_FOR_JAVA (ref
) = 1;
12589 base_binfo
= NULL_TREE
;
12590 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12592 base_binfo
= TYPE_BINFO (basetype
);
12593 /* The original basetype could have been a typedef'd type. */
12594 basetype
= BINFO_TYPE (base_binfo
);
12596 /* Inherit flags from the base. */
12597 TYPE_HAS_NEW_OPERATOR (ref
)
12598 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12599 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12600 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12601 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12602 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12603 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12604 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12605 CLASSTYPE_REPEATED_BASE_P (ref
)
12606 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12609 /* We must do this test after we've seen through a typedef
12611 if (TYPE_MARKED_P (basetype
))
12613 if (basetype
== ref
)
12614 error ("recursive type %qT undefined", basetype
);
12616 error ("duplicate base type %qT invalid", basetype
);
12620 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12621 /* Regenerate the pack expansion for the bases. */
12622 basetype
= make_pack_expansion (basetype
);
12624 TYPE_MARKED_P (basetype
) = 1;
12626 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12627 &igo_prev
, via_virtual
);
12628 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12629 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12631 BINFO_BASE_APPEND (binfo
, base_binfo
);
12632 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12635 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12636 /* If we didn't get max_vbases vbases, we must have shared at
12637 least one of them, and are therefore diamond shaped. */
12638 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12640 /* Unmark all the types. */
12641 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12642 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12643 TYPE_MARKED_P (ref
) = 0;
12645 /* Now see if we have a repeated base type. */
12646 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12648 for (base_binfo
= binfo
; base_binfo
;
12649 base_binfo
= TREE_CHAIN (base_binfo
))
12651 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12653 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12656 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12658 for (base_binfo
= binfo
; base_binfo
;
12659 base_binfo
= TREE_CHAIN (base_binfo
))
12660 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12661 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12670 /* Copies the enum-related properties from type SRC to type DST.
12671 Used with the underlying type of an enum and the enum itself. */
12673 copy_type_enum (tree dst
, tree src
)
12676 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12678 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12679 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12680 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12681 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12682 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12683 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12684 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12685 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12686 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12690 /* Begin compiling the definition of an enumeration type.
12693 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12695 UNDERLYING_TYPE is the type that will be used as the storage for
12696 the enumeration type. This should be NULL_TREE if no storage type
12699 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12701 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12703 Returns the type object, as yet incomplete.
12704 Also records info about it so that build_enumerator
12705 may be used to declare the individual values as they are read. */
12708 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12709 bool scoped_enum_p
, bool *is_new
)
12711 tree prevtype
= NULL_TREE
;
12712 gcc_assert (identifier_p (name
));
12716 /* [C++0x dcl.enum]p5:
12718 If not explicitly specified, the underlying type of a scoped
12719 enumeration type is int. */
12720 if (!underlying_type
&& scoped_enum_p
)
12721 underlying_type
= integer_type_node
;
12723 if (underlying_type
)
12724 underlying_type
= cv_unqualified (underlying_type
);
12726 /* If this is the real definition for a previous forward reference,
12727 fill in the contents in the same object that used to be the
12728 forward reference. */
12730 enumtype
= lookup_and_check_tag (enum_type
, name
,
12731 /*tag_scope=*/ts_current
,
12732 /*template_header_p=*/false);
12734 /* In case of a template_decl, the only check that should be deferred
12735 to instantiation time is the comparison of underlying types. */
12736 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12738 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12740 error_at (input_location
, "scoped/unscoped mismatch "
12741 "in enum %q#T", enumtype
);
12742 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12743 "previous definition here");
12744 enumtype
= error_mark_node
;
12746 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12748 error_at (input_location
, "underlying type mismatch "
12749 "in enum %q#T", enumtype
);
12750 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12751 "previous definition here");
12752 enumtype
= error_mark_node
;
12754 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12755 && !dependent_type_p (underlying_type
)
12756 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12757 && !same_type_p (underlying_type
,
12758 ENUM_UNDERLYING_TYPE (enumtype
)))
12760 error_at (input_location
, "different underlying type "
12761 "in enum %q#T", enumtype
);
12762 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12763 "previous definition here");
12764 underlying_type
= NULL_TREE
;
12768 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12769 || processing_template_decl
)
12771 /* In case of error, make a dummy enum to allow parsing to
12773 if (enumtype
== error_mark_node
)
12775 name
= make_anon_name ();
12776 enumtype
= NULL_TREE
;
12779 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12780 of an opaque enum, or an opaque enum of an already defined
12781 enumeration (C++0x only).
12782 In any other case, it'll be NULL_TREE. */
12788 prevtype
= enumtype
;
12790 /* Do not push the decl more than once, unless we need to
12791 compare underlying types at instantiation time */
12793 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12794 || (underlying_type
12795 && dependent_type_p (underlying_type
))
12796 || (ENUM_UNDERLYING_TYPE (enumtype
)
12797 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12799 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12800 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12803 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12806 if (enumtype
== error_mark_node
)
12807 return error_mark_node
;
12809 /* The enum is considered opaque until the opening '{' of the
12810 enumerator list. */
12811 SET_OPAQUE_ENUM_P (enumtype
, true);
12812 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12815 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12817 if (underlying_type
)
12819 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12821 copy_type_enum (enumtype
, underlying_type
);
12822 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12824 else if (dependent_type_p (underlying_type
))
12825 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12827 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12828 underlying_type
, enumtype
);
12831 /* If into a template class, the returned enum is always the first
12832 declaration (opaque or not) seen. This way all the references to
12833 this type will be to the same declaration. The following ones are used
12834 only to check for definition errors. */
12835 if (prevtype
&& processing_template_decl
)
12841 /* After processing and defining all the values of an enumeration type,
12842 install their decls in the enumeration type.
12843 ENUMTYPE is the type object. */
12846 finish_enum_value_list (tree enumtype
)
12849 tree underlying_type
;
12852 tree minnode
, maxnode
;
12855 bool fixed_underlying_type_p
12856 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12858 /* We built up the VALUES in reverse order. */
12859 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12861 /* For an enum defined in a template, just set the type of the values;
12862 all further processing is postponed until the template is
12863 instantiated. We need to set the type so that tsubst of a CONST_DECL
12865 if (processing_template_decl
)
12867 for (values
= TYPE_VALUES (enumtype
);
12869 values
= TREE_CHAIN (values
))
12870 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12874 /* Determine the minimum and maximum values of the enumerators. */
12875 if (TYPE_VALUES (enumtype
))
12877 minnode
= maxnode
= NULL_TREE
;
12879 for (values
= TYPE_VALUES (enumtype
);
12881 values
= TREE_CHAIN (values
))
12883 decl
= TREE_VALUE (values
);
12885 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12886 each enumerator has the type of its enumeration. Prior to the
12887 closing brace, the type of each enumerator is the type of its
12888 initializing value. */
12889 TREE_TYPE (decl
) = enumtype
;
12891 /* Update the minimum and maximum values, if appropriate. */
12892 value
= DECL_INITIAL (decl
);
12893 if (value
== error_mark_node
)
12894 value
= integer_zero_node
;
12895 /* Figure out what the minimum and maximum values of the
12896 enumerators are. */
12898 minnode
= maxnode
= value
;
12899 else if (tree_int_cst_lt (maxnode
, value
))
12901 else if (tree_int_cst_lt (value
, minnode
))
12908 If the enumerator-list is empty, the underlying type is as if
12909 the enumeration had a single enumerator with value 0. */
12910 minnode
= maxnode
= integer_zero_node
;
12912 if (!fixed_underlying_type_p
)
12914 /* Compute the number of bits require to represent all values of the
12915 enumeration. We must do this before the type of MINNODE and
12916 MAXNODE are transformed, since tree_int_cst_min_precision relies
12917 on the TREE_TYPE of the value it is passed. */
12918 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12919 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12920 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12921 int precision
= MAX (lowprec
, highprec
);
12923 bool use_short_enum
;
12925 /* Determine the underlying type of the enumeration.
12929 The underlying type of an enumeration is an integral type that
12930 can represent all the enumerator values defined in the
12931 enumeration. It is implementation-defined which integral type is
12932 used as the underlying type for an enumeration except that the
12933 underlying type shall not be larger than int unless the value of
12934 an enumerator cannot fit in an int or unsigned int.
12936 We use "int" or an "unsigned int" as the underlying type, even if
12937 a smaller integral type would work, unless the user has
12938 explicitly requested that we use the smallest possible type. The
12939 user can request that for all enumerations with a command line
12940 flag, or for just one enumeration with an attribute. */
12942 use_short_enum
= flag_short_enums
12943 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12945 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12949 underlying_type
= integer_types
[itk
];
12950 if (underlying_type
!= NULL_TREE
12951 && TYPE_PRECISION (underlying_type
) >= precision
12952 && TYPE_SIGN (underlying_type
) == sgn
)
12955 if (itk
== itk_none
)
12959 IF no integral type can represent all the enumerator values, the
12960 enumeration is ill-formed. */
12961 error ("no integral type can represent all of the enumerator values "
12962 "for %qT", enumtype
);
12963 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12964 underlying_type
= integer_types
[itk_unsigned_long_long
];
12969 The value of sizeof() applied to an enumeration type, an object
12970 of an enumeration type, or an enumerator, is the value of sizeof()
12971 applied to the underlying type. */
12972 copy_type_enum (enumtype
, underlying_type
);
12974 /* Compute the minimum and maximum values for the type.
12978 For an enumeration where emin is the smallest enumerator and emax
12979 is the largest, the values of the enumeration are the values of the
12980 underlying type in the range bmin to bmax, where bmin and bmax are,
12981 respectively, the smallest and largest values of the smallest bit-
12982 field that can store emin and emax. */
12984 /* The middle-end currently assumes that types with TYPE_PRECISION
12985 narrower than their underlying type are suitably zero or sign
12986 extended to fill their mode. Similarly, it assumes that the front
12987 end assures that a value of a particular type must be within
12988 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12990 We used to set these fields based on bmin and bmax, but that led
12991 to invalid assumptions like optimizing away bounds checking. So
12992 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12993 TYPE_MAX_VALUE to the values for the mode above and only restrict
12994 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12995 ENUM_UNDERLYING_TYPE (enumtype
)
12996 = build_distinct_type_copy (underlying_type
);
12997 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12998 set_min_and_max_values_for_integral_type
12999 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
13001 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
13002 if (flag_strict_enums
)
13003 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
13006 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13008 /* Convert each of the enumerators to the type of the underlying
13009 type of the enumeration. */
13010 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13012 location_t saved_location
;
13014 decl
= TREE_VALUE (values
);
13015 saved_location
= input_location
;
13016 input_location
= DECL_SOURCE_LOCATION (decl
);
13017 if (fixed_underlying_type_p
)
13018 /* If the enumeration type has a fixed underlying type, we
13019 already checked all of the enumerator values. */
13020 value
= DECL_INITIAL (decl
);
13022 value
= perform_implicit_conversion (underlying_type
,
13023 DECL_INITIAL (decl
),
13024 tf_warning_or_error
);
13025 input_location
= saved_location
;
13027 /* Do not clobber shared ints. */
13028 value
= copy_node (value
);
13030 TREE_TYPE (value
) = enumtype
;
13031 DECL_INITIAL (decl
) = value
;
13034 /* Fix up all variant types of this enum type. */
13035 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13036 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13038 if (at_class_scope_p ()
13039 && COMPLETE_TYPE_P (current_class_type
)
13040 && UNSCOPED_ENUM_P (enumtype
))
13041 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13042 current_class_type
);
13044 /* Finish debugging output for this type. */
13045 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13048 /* Finishes the enum type. This is called only the first time an
13049 enumeration is seen, be it opaque or odinary.
13050 ENUMTYPE is the type object. */
13053 finish_enum (tree enumtype
)
13055 if (processing_template_decl
)
13057 if (at_function_scope_p ())
13058 add_stmt (build_min (TAG_DEFN
, enumtype
));
13062 /* If this is a forward declaration, there should not be any variants,
13063 though we can get a variant in the middle of an enum-specifier with
13064 wacky code like 'enum E { e = sizeof(const E*) };' */
13065 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13066 && (TYPE_VALUES (enumtype
)
13067 || !TYPE_NEXT_VARIANT (enumtype
)));
13070 /* Build and install a CONST_DECL for an enumeration constant of the
13071 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13072 Apply ATTRIBUTES if available. LOC is the location of NAME.
13073 Assignment of sequential values by default is handled here. */
13076 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13083 /* scalar_constant_value will pull out this expression, so make sure
13084 it's folded as appropriate. */
13085 if (processing_template_decl
)
13086 value
= fold_non_dependent_expr (value
);
13088 /* If the VALUE was erroneous, pretend it wasn't there; that will
13089 result in the enum being assigned the next value in sequence. */
13090 if (value
== error_mark_node
)
13093 /* Remove no-op casts from the value. */
13095 STRIP_TYPE_NOPS (value
);
13097 if (! processing_template_decl
)
13099 /* Validate and default VALUE. */
13100 if (value
!= NULL_TREE
)
13102 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13104 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13109 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13110 (TREE_TYPE (value
)))
13111 value
= perform_implicit_conversion_flags
13112 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13113 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13115 if (value
== error_mark_node
)
13118 if (value
!= NULL_TREE
)
13120 value
= cxx_constant_value (value
);
13122 if (TREE_CODE (value
) != INTEGER_CST
13123 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13125 error ("enumerator value for %qD is not an integer constant",
13132 /* Default based on previous value. */
13133 if (value
== NULL_TREE
)
13135 if (TYPE_VALUES (enumtype
))
13140 /* C++03 7.2/4: If no initializer is specified for the first
13141 enumerator, the type is an unspecified integral
13142 type. Otherwise the type is the same as the type of the
13143 initializing value of the preceding enumerator unless the
13144 incremented value is not representable in that type, in
13145 which case the type is an unspecified integral type
13146 sufficient to contain the incremented value. */
13147 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13148 if (error_operand_p (prev_value
))
13149 value
= error_mark_node
;
13152 tree type
= TREE_TYPE (prev_value
);
13153 signop sgn
= TYPE_SIGN (type
);
13154 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13158 bool pos
= !wi::neg_p (wi
, sgn
);
13159 if (!wi::fits_to_tree_p (wi
, type
))
13162 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13164 type
= integer_types
[itk
];
13165 if (type
!= NULL_TREE
13166 && (pos
|| !TYPE_UNSIGNED (type
))
13167 && wi::fits_to_tree_p (wi
, type
))
13170 if (type
&& cxx_dialect
< cxx11
13171 && itk
> itk_unsigned_long
)
13172 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13173 incremented enumerator value is too large for %<unsigned long%>" : "\
13174 incremented enumerator value is too large for %<long%>");
13176 if (type
== NULL_TREE
)
13179 value
= wide_int_to_tree (type
, wi
);
13184 error ("overflow in enumeration values at %qD", name
);
13185 value
= error_mark_node
;
13190 value
= integer_zero_node
;
13193 /* Remove no-op casts from the value. */
13194 STRIP_TYPE_NOPS (value
);
13196 /* If the underlying type of the enum is fixed, check whether
13197 the enumerator values fits in the underlying type. If it
13198 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13199 if (ENUM_UNDERLYING_TYPE (enumtype
)
13201 && TREE_CODE (value
) == INTEGER_CST
)
13203 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13204 error ("enumerator value %E is outside the range of underlying "
13205 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13207 /* Convert the value to the appropriate type. */
13208 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13212 /* C++ associates enums with global, function, or class declarations. */
13213 context
= current_scope ();
13215 /* Build the actual enumeration constant. Note that the enumeration
13216 constants have the underlying type of the enum (if it is fixed)
13217 or the type of their initializer (if the underlying type of the
13218 enum is not fixed):
13222 If the underlying type is fixed, the type of each enumerator
13223 prior to the closing brace is the underlying type; if the
13224 initializing value of an enumerator cannot be represented by
13225 the underlying type, the program is ill-formed. If the
13226 underlying type is not fixed, the type of each enumerator is
13227 the type of its initializing value.
13229 If the underlying type is not fixed, it will be computed by
13230 finish_enum and we will reset the type of this enumerator. Of
13231 course, if we're processing a template, there may be no value. */
13232 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13234 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13236 DECL_CONTEXT (decl
) = enumtype
;
13237 TREE_CONSTANT (decl
) = 1;
13238 TREE_READONLY (decl
) = 1;
13239 DECL_INITIAL (decl
) = value
;
13242 cplus_decl_attributes (&decl
, attributes
, 0);
13244 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13245 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13246 on the TYPE_FIELDS list for `S'. (That's so that you can say
13247 things like `S::i' later.) */
13248 finish_member_declaration (decl
);
13252 /* Add this enumeration constant to the list for this type. */
13253 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13256 /* Look for an enumerator with the given NAME within the enumeration
13257 type ENUMTYPE. This routine is used primarily for qualified name
13258 lookup into an enumerator in C++0x, e.g.,
13260 enum class Color { Red, Green, Blue };
13262 Color color = Color::Red;
13264 Returns the value corresponding to the enumerator, or
13265 NULL_TREE if no such enumerator was found. */
13267 lookup_enumerator (tree enumtype
, tree name
)
13270 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13272 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13273 return e
? TREE_VALUE (e
) : NULL_TREE
;
13277 /* We're defining DECL. Make sure that its type is OK. */
13280 check_function_type (tree decl
, tree current_function_parms
)
13282 tree fntype
= TREE_TYPE (decl
);
13283 tree return_type
= complete_type (TREE_TYPE (fntype
));
13285 /* In a function definition, arg types must be complete. */
13286 require_complete_types_for_parms (current_function_parms
);
13288 if (dependent_type_p (return_type
)
13289 || type_uses_auto (return_type
))
13291 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13292 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13294 tree args
= TYPE_ARG_TYPES (fntype
);
13296 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13297 error ("return type %q#T is incomplete", return_type
);
13299 error ("return type has Java class type %q#T", return_type
);
13301 /* Make it return void instead. */
13302 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13303 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13305 TREE_CHAIN (args
));
13307 fntype
= build_function_type (void_type_node
, args
);
13309 = build_exception_variant (fntype
,
13310 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13311 fntype
= (cp_build_type_attribute_variant
13312 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13313 TREE_TYPE (decl
) = fntype
;
13316 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13319 /* Create the FUNCTION_DECL for a function definition.
13320 DECLSPECS and DECLARATOR are the parts of the declaration;
13321 they describe the function's name and the type it returns,
13322 but twisted together in a fashion that parallels the syntax of C.
13324 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13325 DECLARATOR is really the DECL for the function we are about to
13326 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13327 indicating that the function is an inline defined in-class.
13329 This function creates a binding context for the function body
13330 as well as setting up the FUNCTION_DECL in current_function_decl.
13332 For C++, we must first check whether that datum makes any sense.
13333 For example, "class A local_a(1,2);" means that variable local_a
13334 is an aggregate of type A, which should have a constructor
13335 applied to it with the argument list [1, 2].
13337 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13338 or may be a BLOCK if the function has been defined previously
13339 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13340 error_mark_node if the function has never been defined, or
13341 a BLOCK if the function has been defined somewhere. */
13344 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13346 tree ctype
= NULL_TREE
;
13349 int doing_friend
= 0;
13350 cp_binding_level
*bl
;
13351 tree current_function_parms
;
13352 struct c_fileinfo
*finfo
13353 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13354 bool honor_interface
;
13356 /* Sanity check. */
13357 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13358 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13360 fntype
= TREE_TYPE (decl1
);
13361 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13362 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13364 /* ISO C++ 11.4/5. A friend function defined in a class is in
13365 the (lexical) scope of the class in which it is defined. */
13366 if (!ctype
&& DECL_FRIEND_P (decl1
))
13368 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13370 /* CTYPE could be null here if we're dealing with a template;
13371 for example, `inline friend float foo()' inside a template
13372 will have no CTYPE set. */
13373 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13379 if (DECL_DECLARED_INLINE_P (decl1
)
13380 && lookup_attribute ("noinline", attrs
))
13381 warning (0, "inline function %q+D given attribute noinline", decl1
);
13383 /* Handle gnu_inline attribute. */
13384 if (GNU_INLINE_P (decl1
))
13386 DECL_EXTERNAL (decl1
) = 1;
13387 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13388 DECL_INTERFACE_KNOWN (decl1
) = 1;
13389 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13392 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13393 /* This is a constructor, we must ensure that any default args
13394 introduced by this definition are propagated to the clones
13395 now. The clones are used directly in overload resolution. */
13396 adjust_clone_args (decl1
);
13398 /* Sometimes we don't notice that a function is a static member, and
13399 build a METHOD_TYPE for it. Fix that up now. */
13400 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13401 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13403 /* Set up current_class_type, and enter the scope of the class, if
13406 push_nested_class (ctype
);
13407 else if (DECL_STATIC_FUNCTION_P (decl1
))
13408 push_nested_class (DECL_CONTEXT (decl1
));
13410 /* Now that we have entered the scope of the class, we must restore
13411 the bindings for any template parameters surrounding DECL1, if it
13412 is an inline member template. (Order is important; consider the
13413 case where a template parameter has the same name as a field of
13414 the class.) It is not until after this point that
13415 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13416 if (flags
& SF_INCLASS_INLINE
)
13417 maybe_begin_member_template_processing (decl1
);
13419 /* Effective C++ rule 15. */
13421 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13422 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13423 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13425 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13426 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13427 if (!DECL_INITIAL (decl1
))
13428 DECL_INITIAL (decl1
) = error_mark_node
;
13430 /* This function exists in static storage.
13431 (This does not mean `static' in the C sense!) */
13432 TREE_STATIC (decl1
) = 1;
13434 /* We must call push_template_decl after current_class_type is set
13435 up. (If we are processing inline definitions after exiting a
13436 class scope, current_class_type will be NULL_TREE until set above
13437 by push_nested_class.) */
13438 if (processing_template_decl
)
13440 tree newdecl1
= push_template_decl (decl1
);
13441 if (newdecl1
== error_mark_node
)
13443 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13444 pop_nested_class ();
13450 /* We are now in the scope of the function being defined. */
13451 current_function_decl
= decl1
;
13453 /* Save the parm names or decls from this function's declarator
13454 where store_parm_decls will find them. */
13455 current_function_parms
= DECL_ARGUMENTS (decl1
);
13457 /* Make sure the parameter and return types are reasonable. When
13458 you declare a function, these types can be incomplete, but they
13459 must be complete when you define the function. */
13460 check_function_type (decl1
, current_function_parms
);
13462 /* Build the return declaration for the function. */
13463 restype
= TREE_TYPE (fntype
);
13465 if (DECL_RESULT (decl1
) == NULL_TREE
)
13469 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13470 DECL_ARTIFICIAL (resdecl
) = 1;
13471 DECL_IGNORED_P (resdecl
) = 1;
13472 DECL_RESULT (decl1
) = resdecl
;
13474 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13477 /* Let the user know we're compiling this function. */
13478 announce_function (decl1
);
13480 /* Record the decl so that the function name is defined.
13481 If we already have a decl for this name, and it is a FUNCTION_DECL,
13482 use the old decl. */
13483 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13485 /* A specialization is not used to guide overload resolution. */
13486 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13487 && !(DECL_USE_TEMPLATE (decl1
) &&
13488 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13490 tree olddecl
= pushdecl (decl1
);
13492 if (olddecl
== error_mark_node
)
13493 /* If something went wrong when registering the declaration,
13494 use DECL1; we have to have a FUNCTION_DECL to use when
13495 parsing the body of the function. */
13499 /* Otherwise, OLDDECL is either a previous declaration
13500 of the same function or DECL1 itself. */
13502 if (warn_missing_declarations
13503 && olddecl
== decl1
13504 && !DECL_MAIN_P (decl1
)
13505 && TREE_PUBLIC (decl1
)
13506 && !DECL_DECLARED_INLINE_P (decl1
))
13510 /* Check whether DECL1 is in an anonymous
13512 for (context
= DECL_CONTEXT (decl1
);
13514 context
= DECL_CONTEXT (context
))
13516 if (TREE_CODE (context
) == NAMESPACE_DECL
13517 && DECL_NAME (context
) == NULL_TREE
)
13521 if (context
== NULL
)
13522 warning (OPT_Wmissing_declarations
,
13523 "no previous declaration for %q+D", decl1
);
13531 /* We need to set the DECL_CONTEXT. */
13532 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13533 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13535 fntype
= TREE_TYPE (decl1
);
13536 restype
= TREE_TYPE (fntype
);
13538 /* If #pragma weak applies, mark the decl appropriately now.
13539 The pragma only applies to global functions. Because
13540 determining whether or not the #pragma applies involves
13541 computing the mangled name for the declaration, we cannot
13542 apply the pragma until after we have merged this declaration
13543 with any previous declarations; if the original declaration
13544 has a linkage specification, that specification applies to
13545 the definition as well, and may affect the mangled name. */
13546 if (DECL_FILE_SCOPE_P (decl1
))
13547 maybe_apply_pragma_weak (decl1
);
13550 /* Reset this in case the call to pushdecl changed it. */
13551 current_function_decl
= decl1
;
13553 gcc_assert (DECL_INITIAL (decl1
));
13555 /* This function may already have been parsed, in which case just
13556 return; our caller will skip over the body without parsing. */
13557 if (DECL_INITIAL (decl1
) != error_mark_node
)
13560 /* Initialize RTL machinery. We cannot do this until
13561 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13562 even when processing a template; this is how we get
13563 CFUN set up, and our per-function variables initialized.
13564 FIXME factor out the non-RTL stuff. */
13565 bl
= current_binding_level
;
13566 allocate_struct_function (decl1
, processing_template_decl
);
13568 /* Initialize the language data structures. Whenever we start
13569 a new function, we destroy temporaries in the usual way. */
13570 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13571 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13572 current_binding_level
= bl
;
13574 if (!processing_template_decl
&& type_uses_auto (restype
))
13576 FNDECL_USED_AUTO (decl1
) = true;
13577 current_function_auto_return_pattern
= restype
;
13580 /* Start the statement-tree, start the tree now. */
13581 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13583 /* If we are (erroneously) defining a function that we have already
13584 defined before, wipe out what we knew before. */
13585 if (!DECL_PENDING_INLINE_P (decl1
))
13586 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13588 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13590 /* We know that this was set up by `grokclassfn'. We do not
13591 wait until `store_parm_decls', since evil parse errors may
13592 never get us to that point. Here we keep the consistency
13593 between `current_class_type' and `current_class_ptr'. */
13594 tree t
= DECL_ARGUMENTS (decl1
);
13596 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13597 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13599 cp_function_chain
->x_current_class_ref
13600 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13601 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13602 cp_function_chain
->x_current_class_ptr
= t
;
13604 /* Constructors and destructors need to know whether they're "in
13605 charge" of initializing virtual base classes. */
13606 t
= DECL_CHAIN (t
);
13607 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13609 current_in_charge_parm
= t
;
13610 t
= DECL_CHAIN (t
);
13612 if (DECL_HAS_VTT_PARM_P (decl1
))
13614 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13615 current_vtt_parm
= t
;
13619 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13620 /* Implicitly-defined methods (like the
13621 destructor for a class in which no destructor
13622 is explicitly declared) must not be defined
13623 until their definition is needed. So, we
13624 ignore interface specifications for
13625 compiler-generated functions. */
13626 && !DECL_ARTIFICIAL (decl1
));
13628 if (processing_template_decl
)
13629 /* Don't mess with interface flags. */;
13630 else if (DECL_INTERFACE_KNOWN (decl1
))
13632 tree ctx
= decl_function_context (decl1
);
13634 if (DECL_NOT_REALLY_EXTERN (decl1
))
13635 DECL_EXTERNAL (decl1
) = 0;
13637 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13638 /* This is a function in a local class in an extern inline
13639 or template function. */
13640 comdat_linkage (decl1
);
13642 /* If this function belongs to an interface, it is public.
13643 If it belongs to someone else's interface, it is also external.
13644 This only affects inlines and template instantiations. */
13645 else if (!finfo
->interface_unknown
&& honor_interface
)
13647 if (DECL_DECLARED_INLINE_P (decl1
)
13648 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13650 DECL_EXTERNAL (decl1
)
13651 = (finfo
->interface_only
13652 || (DECL_DECLARED_INLINE_P (decl1
)
13653 && ! flag_implement_inlines
13654 && !DECL_VINDEX (decl1
)));
13656 /* For WIN32 we also want to put these in linkonce sections. */
13657 maybe_make_one_only (decl1
);
13660 DECL_EXTERNAL (decl1
) = 0;
13661 DECL_INTERFACE_KNOWN (decl1
) = 1;
13662 /* If this function is in an interface implemented in this file,
13663 make sure that the back end knows to emit this function
13665 if (!DECL_EXTERNAL (decl1
))
13666 mark_needed (decl1
);
13668 else if (finfo
->interface_unknown
&& finfo
->interface_only
13669 && honor_interface
)
13671 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13672 interface, we will have both finfo->interface_unknown and
13673 finfo->interface_only set. In that case, we don't want to
13674 use the normal heuristics because someone will supply a
13675 #pragma implementation elsewhere, and deducing it here would
13676 produce a conflict. */
13677 comdat_linkage (decl1
);
13678 DECL_EXTERNAL (decl1
) = 0;
13679 DECL_INTERFACE_KNOWN (decl1
) = 1;
13680 DECL_DEFER_OUTPUT (decl1
) = 1;
13684 /* This is a definition, not a reference.
13685 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13686 if (!GNU_INLINE_P (decl1
))
13687 DECL_EXTERNAL (decl1
) = 0;
13689 if ((DECL_DECLARED_INLINE_P (decl1
)
13690 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13691 && ! DECL_INTERFACE_KNOWN (decl1
))
13692 DECL_DEFER_OUTPUT (decl1
) = 1;
13694 DECL_INTERFACE_KNOWN (decl1
) = 1;
13697 /* Determine the ELF visibility attribute for the function. We must not
13698 do this before calling "pushdecl", as we must allow "duplicate_decls"
13699 to merge any attributes appropriately. We also need to wait until
13701 if (!DECL_CLONED_FUNCTION_P (decl1
))
13702 determine_visibility (decl1
);
13704 if (!processing_template_decl
)
13705 maybe_instantiate_noexcept (decl1
);
13707 begin_scope (sk_function_parms
, decl1
);
13711 if (DECL_DESTRUCTOR_P (decl1
)
13712 || (DECL_CONSTRUCTOR_P (decl1
)
13713 && targetm
.cxx
.cdtor_returns_this ()))
13715 cdtor_label
= create_artificial_label (input_location
);
13718 start_fname_decls ();
13720 store_parm_decls (current_function_parms
);
13722 if (!processing_template_decl
13723 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
))
13725 /* Insert a clobber to let the back end know that the object storage
13726 is dead when we enter the constructor. */
13727 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13728 tree clobber
= build_constructor (btype
, NULL
);
13729 TREE_THIS_VOLATILE (clobber
) = true;
13730 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13731 bref
= convert_from_reference (bref
);
13732 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13733 finish_expr_stmt (exprstmt
);
13740 /* Like start_preparsed_function, except that instead of a
13741 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13743 Returns true on success. If the DECLARATOR is not suitable
13744 for a function, we return false, which tells the parser to
13745 skip the entire function. */
13748 start_function (cp_decl_specifier_seq
*declspecs
,
13749 const cp_declarator
*declarator
,
13754 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13755 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
13756 if (decl1
== error_mark_node
)
13758 /* If the declarator is not suitable for a function definition,
13759 cause a syntax error. */
13760 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13762 error ("invalid function declaration");
13766 if (DECL_MAIN_P (decl1
))
13767 /* main must return int. grokfndecl should have corrected it
13768 (and issued a diagnostic) if the user got it wrong. */
13769 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13770 integer_type_node
));
13772 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13775 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13779 use_eh_spec_block (tree fn
)
13781 return (flag_exceptions
&& flag_enforce_eh_specs
13782 && !processing_template_decl
13783 && !type_throw_all_p (TREE_TYPE (fn
))
13784 /* We insert the EH_SPEC_BLOCK only in the original
13785 function; then, it is copied automatically to the
13787 && !DECL_CLONED_FUNCTION_P (fn
)
13788 /* Implicitly-generated constructors and destructors have
13789 exception specifications. However, those specifications
13790 are the union of the possible exceptions specified by the
13791 constructors/destructors for bases and members, so no
13792 unallowed exception will ever reach this function. By
13793 not creating the EH_SPEC_BLOCK we save a little memory,
13794 and we avoid spurious warnings about unreachable
13796 && !DECL_DEFAULTED_FN (fn
));
13799 /* Store the parameter declarations into the current function declaration.
13800 This is called after parsing the parameter declarations, before
13801 digesting the body of the function.
13803 Also install to binding contour return value identifier, if any. */
13806 store_parm_decls (tree current_function_parms
)
13808 tree fndecl
= current_function_decl
;
13811 /* This is a chain of any other decls that came in among the parm
13812 declarations. If a parm is declared with enum {foo, bar} x;
13813 then CONST_DECLs for foo and bar are put here. */
13814 tree nonparms
= NULL_TREE
;
13816 if (current_function_parms
)
13818 /* This case is when the function was defined with an ANSI prototype.
13819 The parms already have decls, so we need not do anything here
13820 except record them as in effect
13821 and complain if any redundant old-style parm decls were written. */
13823 tree specparms
= current_function_parms
;
13826 /* Must clear this because it might contain TYPE_DECLs declared
13828 current_binding_level
->names
= NULL
;
13830 /* If we're doing semantic analysis, then we'll call pushdecl
13831 for each of these. We must do them in reverse order so that
13832 they end in the correct forward order. */
13833 specparms
= nreverse (specparms
);
13835 for (parm
= specparms
; parm
; parm
= next
)
13837 next
= DECL_CHAIN (parm
);
13838 if (TREE_CODE (parm
) == PARM_DECL
)
13840 if (DECL_NAME (parm
) == NULL_TREE
13841 || !VOID_TYPE_P (parm
))
13844 error ("parameter %qD declared void", parm
);
13848 /* If we find an enum constant or a type tag,
13849 put it aside for the moment. */
13850 TREE_CHAIN (parm
) = NULL_TREE
;
13851 nonparms
= chainon (nonparms
, parm
);
13855 /* Get the decls in their original chain order and record in the
13856 function. This is all and only the PARM_DECLs that were
13857 pushed into scope by the loop above. */
13858 DECL_ARGUMENTS (fndecl
) = getdecls ();
13861 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13863 /* Now store the final chain of decls for the arguments
13864 as the decl-chain of the current lexical scope.
13865 Put the enumerators in as well, at the front so that
13866 DECL_ARGUMENTS is not modified. */
13867 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13869 if (use_eh_spec_block (current_function_decl
))
13870 current_eh_spec_block
= begin_eh_spec_block ();
13874 /* We have finished doing semantic analysis on DECL, but have not yet
13875 generated RTL for its body. Save away our current state, so that
13876 when we want to generate RTL later we know what to do. */
13879 save_function_data (tree decl
)
13881 struct language_function
*f
;
13883 /* Save the language-specific per-function data so that we can
13884 get it back when we really expand this function. */
13885 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13888 f
= ggc_alloc
<language_function
> ();
13889 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13890 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13892 /* Clear out the bits we don't need. */
13893 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13894 f
->bindings
= NULL
;
13895 f
->x_local_names
= NULL
;
13896 f
->base
.local_typedefs
= NULL
;
13900 /* Set the return value of the constructor (if present). */
13903 finish_constructor_body (void)
13908 if (targetm
.cxx
.cdtor_returns_this ()
13909 && (! TYPE_FOR_JAVA (current_class_type
)))
13911 /* Any return from a constructor will end up here. */
13912 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13914 val
= DECL_ARGUMENTS (current_function_decl
);
13915 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13916 DECL_RESULT (current_function_decl
), val
);
13917 /* Return the address of the object. */
13918 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13919 add_stmt (exprstmt
);
13923 /* Do all the processing for the beginning of a destructor; set up the
13924 vtable pointers and cleanups for bases and members. */
13927 begin_destructor_body (void)
13929 tree compound_stmt
;
13931 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13932 issued an error message. We still want to try to process the
13933 body of the function, but initialize_vtbl_ptrs will crash if
13934 TYPE_BINFO is NULL. */
13935 if (COMPLETE_TYPE_P (current_class_type
))
13937 compound_stmt
= begin_compound_stmt (0);
13938 /* Make all virtual function table pointers in non-virtual base
13939 classes point to CURRENT_CLASS_TYPE's virtual function
13941 initialize_vtbl_ptrs (current_class_ptr
);
13942 finish_compound_stmt (compound_stmt
);
13944 if (flag_lifetime_dse
)
13946 /* Insert a cleanup to let the back end know that the object is dead
13947 when we exit the destructor, either normally or via exception. */
13948 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13949 tree clobber
= build_constructor (btype
, NULL
);
13950 TREE_THIS_VOLATILE (clobber
) = true;
13951 tree bref
= build_nop (build_reference_type (btype
),
13952 current_class_ptr
);
13953 bref
= convert_from_reference (bref
);
13954 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13955 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13958 /* And insert cleanups for our bases and members so that they
13959 will be properly destroyed if we throw. */
13960 push_base_cleanups ();
13964 /* At the end of every destructor we generate code to delete the object if
13965 necessary. Do that now. */
13968 finish_destructor_body (void)
13972 /* Any return from a destructor will end up here; that way all base
13973 and member cleanups will be run when the function returns. */
13974 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13976 /* In a virtual destructor, we must call delete. */
13977 if (DECL_VIRTUAL_P (current_function_decl
))
13980 tree virtual_size
= cxx_sizeof (current_class_type
);
13984 At the point of definition of a virtual destructor (including
13985 an implicit definition), non-placement operator delete shall
13986 be looked up in the scope of the destructor's class and if
13987 found shall be accessible and unambiguous. */
13988 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13990 /*global_p=*/false,
13991 /*placement=*/NULL_TREE
,
13992 /*alloc_fn=*/NULL_TREE
,
13993 tf_warning_or_error
);
13995 if_stmt
= begin_if_stmt ();
13996 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13997 current_in_charge_parm
,
14000 finish_expr_stmt (exprstmt
);
14001 finish_then_clause (if_stmt
);
14002 finish_if_stmt (if_stmt
);
14005 if (targetm
.cxx
.cdtor_returns_this ())
14009 val
= DECL_ARGUMENTS (current_function_decl
);
14010 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14011 DECL_RESULT (current_function_decl
), val
);
14012 /* Return the address of the object. */
14013 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14014 add_stmt (exprstmt
);
14018 /* Do the necessary processing for the beginning of a function body, which
14019 in this case includes member-initializers, but not the catch clauses of
14020 a function-try-block. Currently, this means opening a binding level
14021 for the member-initializers (in a ctor), member cleanups (in a dtor),
14022 and capture proxies (in a lambda operator()). */
14025 begin_function_body (void)
14029 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14032 if (processing_template_decl
)
14033 /* Do nothing now. */;
14035 /* Always keep the BLOCK node associated with the outermost pair of
14036 curly braces of a function. These are needed for correct
14037 operation of dwarfout.c. */
14038 keep_next_level (true);
14040 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14042 if (processing_template_decl
)
14043 /* Do nothing now. */;
14044 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14045 begin_destructor_body ();
14050 /* Do the processing for the end of a function body. Currently, this means
14051 closing out the cleanups for fully-constructed bases and members, and in
14052 the case of the destructor, deleting the object if desired. Again, this
14053 is only meaningful for [cd]tors, since they are the only functions where
14054 there is a significant distinction between the main body and any
14055 function catch clauses. Handling, say, main() return semantics here
14056 would be wrong, as flowing off the end of a function catch clause for
14057 main() would also need to return 0. */
14060 finish_function_body (tree compstmt
)
14062 if (compstmt
== NULL_TREE
)
14065 /* Close the block. */
14066 finish_compound_stmt (compstmt
);
14068 if (processing_template_decl
)
14069 /* Do nothing now. */;
14070 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14071 finish_constructor_body ();
14072 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14073 finish_destructor_body ();
14076 /* Given a function, returns the BLOCK corresponding to the outermost level
14077 of curly braces, skipping the artificial block created for constructor
14081 outer_curly_brace_block (tree fndecl
)
14083 tree block
= DECL_INITIAL (fndecl
);
14084 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14086 block
= BLOCK_SUBBLOCKS (block
);
14087 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14089 block
= BLOCK_SUBBLOCKS (block
);
14090 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14094 /* If FNDECL is a class's key method, add the class to the list of
14095 keyed classes that should be emitted. */
14098 record_key_method_defined (tree fndecl
)
14100 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14101 && DECL_VIRTUAL_P (fndecl
)
14102 && !processing_template_decl
)
14104 tree fnclass
= DECL_CONTEXT (fndecl
);
14105 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14106 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14110 /* Subroutine of finish_function.
14111 Save the body of constexpr functions for possible
14112 future compile time evaluation. */
14115 maybe_save_function_definition (tree fun
)
14117 if (!processing_template_decl
14118 && DECL_DECLARED_CONSTEXPR_P (fun
)
14119 && !cp_function_chain
->invalid_constexpr
14120 && !DECL_CLONED_FUNCTION_P (fun
))
14121 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14124 /* Finish up a function declaration and compile that function
14125 all the way to assembler language output. The free the storage
14126 for the function definition.
14128 FLAGS is a bitwise or of the following values:
14130 We just finished processing the body of an in-class inline
14131 function definition. (This processing will have taken place
14132 after the class definition is complete.) */
14135 finish_function (int flags
)
14137 tree fndecl
= current_function_decl
;
14138 tree fntype
, ctype
= NULL_TREE
;
14139 int inclass_inline
= (flags
& 2) != 0;
14141 /* When we get some parse errors, we can end up without a
14142 current_function_decl, so cope. */
14143 if (fndecl
== NULL_TREE
)
14144 return error_mark_node
;
14146 if (c_dialect_objc ())
14147 objc_finish_function ();
14149 gcc_assert (!defer_mark_used_calls
);
14150 defer_mark_used_calls
= true;
14152 record_key_method_defined (fndecl
);
14154 fntype
= TREE_TYPE (fndecl
);
14156 /* TREE_READONLY (fndecl) = 1;
14157 This caused &foo to be of type ptr-to-const-function
14158 which then got a warning when stored in a ptr-to-function variable. */
14160 gcc_assert (building_stmt_list_p ());
14161 /* The current function is being defined, so its DECL_INITIAL should
14162 be set, and unless there's a multiple definition, it should be
14163 error_mark_node. */
14164 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14166 /* For a cloned function, we've already got all the code we need;
14167 there's no need to add any extra bits. */
14168 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14170 /* Make it so that `main' always returns 0 by default. */
14171 if (DECL_MAIN_P (current_function_decl
))
14172 finish_return_stmt (integer_zero_node
);
14174 if (use_eh_spec_block (current_function_decl
))
14175 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14176 (TREE_TYPE (current_function_decl
)),
14177 current_eh_spec_block
);
14180 /* If we're saving up tree structure, tie off the function now. */
14181 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14183 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14184 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14186 finish_fname_decls ();
14188 /* If this function can't throw any exceptions, remember that. */
14189 if (!processing_template_decl
14190 && !cp_function_chain
->can_throw
14191 && !flag_non_call_exceptions
14192 && !decl_replaceable_p (fndecl
))
14193 TREE_NOTHROW (fndecl
) = 1;
14195 /* This must come after expand_function_end because cleanups might
14196 have declarations (from inline functions) that need to go into
14197 this function's blocks. */
14199 /* If the current binding level isn't the outermost binding level
14200 for this function, either there is a bug, or we have experienced
14201 syntax errors and the statement tree is malformed. */
14202 if (current_binding_level
->kind
!= sk_function_parms
)
14204 /* Make sure we have already experienced errors. */
14205 gcc_assert (errorcount
);
14207 /* Throw away the broken statement tree and extra binding
14209 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14211 while (current_binding_level
->kind
!= sk_function_parms
)
14213 if (current_binding_level
->kind
== sk_class
)
14214 pop_nested_class ();
14216 poplevel (0, 0, 0);
14219 poplevel (1, 0, 1);
14221 /* Statements should always be full-expressions at the outermost set
14222 of curly braces for a function. */
14223 gcc_assert (stmts_are_full_exprs_p ());
14225 /* If there are no return statements in a function with auto return type,
14226 the return type is void. But if the declared type is something like
14227 auto*, this is an error. */
14228 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14229 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14231 if (!is_auto (current_function_auto_return_pattern
)
14232 && !current_function_returns_value
&& !current_function_returns_null
)
14234 error ("no return statements in function returning %qT",
14235 current_function_auto_return_pattern
);
14236 inform (input_location
, "only plain %<auto%> return type can be "
14237 "deduced to %<void%>");
14239 apply_deduced_return_type (fndecl
, void_type_node
);
14240 fntype
= TREE_TYPE (fndecl
);
14243 /* Save constexpr function body before it gets munged by
14244 the NRV transformation. */
14245 maybe_save_function_definition (fndecl
);
14247 /* Set up the named return value optimization, if we can. Candidate
14248 variables are selected in check_return_expr. */
14249 if (current_function_return_value
)
14251 tree r
= current_function_return_value
;
14254 if (r
!= error_mark_node
14255 /* This is only worth doing for fns that return in memory--and
14256 simpler, since we don't have to worry about promoted modes. */
14257 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14258 /* Only allow this for variables declared in the outer scope of
14259 the function so we know that their lifetime always ends with a
14260 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14261 we were to do this optimization in tree-ssa. */
14262 && (outer
= outer_curly_brace_block (fndecl
))
14263 && chain_member (r
, BLOCK_VARS (outer
)))
14264 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14266 current_function_return_value
= NULL_TREE
;
14269 /* Remember that we were in class scope. */
14270 if (current_class_name
)
14271 ctype
= current_class_type
;
14273 /* Must mark the RESULT_DECL as being in this function. */
14274 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14276 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14277 to the FUNCTION_DECL node itself. */
14278 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14280 /* Save away current state, if appropriate. */
14281 if (!processing_template_decl
)
14282 save_function_data (fndecl
);
14284 /* Complain if there's just no return statement. */
14285 if (warn_return_type
14286 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14287 && !dependent_type_p (TREE_TYPE (fntype
))
14288 && !current_function_returns_value
&& !current_function_returns_null
14289 /* Don't complain if we abort or throw. */
14290 && !current_function_returns_abnormally
14291 /* Don't complain if there's an infinite loop. */
14292 && !current_function_infinite_loop
14293 /* Don't complain if we are declared noreturn. */
14294 && !TREE_THIS_VOLATILE (fndecl
)
14295 && !DECL_NAME (DECL_RESULT (fndecl
))
14296 && !TREE_NO_WARNING (fndecl
)
14297 /* Structor return values (if any) are set by the compiler. */
14298 && !DECL_CONSTRUCTOR_P (fndecl
)
14299 && !DECL_DESTRUCTOR_P (fndecl
)
14300 && targetm
.warn_func_return (fndecl
))
14302 warning (OPT_Wreturn_type
,
14303 "no return statement in function returning non-void");
14304 TREE_NO_WARNING (fndecl
) = 1;
14307 /* Store the end of the function, so that we get good line number
14308 info for the epilogue. */
14309 cfun
->function_end_locus
= input_location
;
14311 /* Complain about parameters that are only set, but never otherwise used. */
14312 if (warn_unused_but_set_parameter
14313 && !processing_template_decl
14314 && errorcount
== unused_but_set_errorcount
14315 && !DECL_CLONED_FUNCTION_P (fndecl
))
14319 for (decl
= DECL_ARGUMENTS (fndecl
);
14321 decl
= DECL_CHAIN (decl
))
14322 if (TREE_USED (decl
)
14323 && TREE_CODE (decl
) == PARM_DECL
14324 && !DECL_READ_P (decl
)
14325 && DECL_NAME (decl
)
14326 && !DECL_ARTIFICIAL (decl
)
14327 && !TREE_NO_WARNING (decl
)
14328 && !DECL_IN_SYSTEM_HEADER (decl
)
14329 && TREE_TYPE (decl
) != error_mark_node
14330 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14331 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14332 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14333 warning (OPT_Wunused_but_set_parameter
,
14334 "parameter %q+D set but not used", decl
);
14335 unused_but_set_errorcount
= errorcount
;
14338 /* Complain about locally defined typedefs that are not used in this
14340 maybe_warn_unused_local_typedefs ();
14342 /* Genericize before inlining. */
14343 if (!processing_template_decl
)
14345 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14346 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14347 cp_genericize (fndecl
);
14348 /* Clear out the bits we don't need. */
14349 f
->x_current_class_ptr
= NULL
;
14350 f
->x_current_class_ref
= NULL
;
14351 f
->x_eh_spec_block
= NULL
;
14352 f
->x_in_charge_parm
= NULL
;
14353 f
->x_vtt_parm
= NULL
;
14354 f
->x_return_value
= NULL
;
14355 f
->bindings
= NULL
;
14356 f
->extern_decl_map
= NULL
;
14357 f
->infinite_loops
= NULL
;
14359 /* Clear out the bits we don't need. */
14360 local_names
= NULL
;
14362 /* We're leaving the context of this function, so zap cfun. It's still in
14363 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14365 current_function_decl
= NULL
;
14367 /* If this is an in-class inline definition, we may have to pop the
14368 bindings for the template parameters that we added in
14369 maybe_begin_member_template_processing when start_function was
14371 if (inclass_inline
)
14372 maybe_end_member_template_processing ();
14374 /* Leave the scope of the class. */
14376 pop_nested_class ();
14381 current_function_decl
= NULL_TREE
;
14383 defer_mark_used_calls
= false;
14384 if (deferred_mark_used_calls
)
14389 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14391 vec_free (deferred_mark_used_calls
);
14394 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14398 /* Create the FUNCTION_DECL for a function definition.
14399 DECLSPECS and DECLARATOR are the parts of the declaration;
14400 they describe the return type and the name of the function,
14401 but twisted together in a fashion that parallels the syntax of C.
14403 This function creates a binding context for the function body
14404 as well as setting up the FUNCTION_DECL in current_function_decl.
14406 Returns a FUNCTION_DECL on success.
14408 If the DECLARATOR is not suitable for a function (it defines a datum
14409 instead), we return 0, which tells yyparse to report a parse error.
14411 May return void_type_node indicating that this method is actually
14412 a friend. See grokfield for more details.
14414 Came here with a `.pushlevel' .
14416 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14417 CHANGES TO CODE IN `grokfield'. */
14420 grokmethod (cp_decl_specifier_seq
*declspecs
,
14421 const cp_declarator
*declarator
, tree attrlist
)
14423 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14426 if (fndecl
== error_mark_node
)
14427 return error_mark_node
;
14429 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14431 error ("invalid member function declaration");
14432 return error_mark_node
;
14436 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14438 /* Pass friends other than inline friend functions back. */
14439 if (fndecl
== void_type_node
)
14442 if (DECL_IN_AGGR_P (fndecl
))
14444 if (DECL_CLASS_SCOPE_P (fndecl
))
14445 error ("%qD is already defined in class %qT", fndecl
,
14446 DECL_CONTEXT (fndecl
));
14447 return error_mark_node
;
14450 check_template_shadow (fndecl
);
14452 if (TREE_PUBLIC (fndecl
))
14453 DECL_COMDAT (fndecl
) = 1;
14454 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14455 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14457 /* We process method specializations in finish_struct_1. */
14458 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14460 fndecl
= push_template_decl (fndecl
);
14461 if (fndecl
== error_mark_node
)
14465 if (! DECL_FRIEND_P (fndecl
))
14467 if (DECL_CHAIN (fndecl
))
14469 fndecl
= copy_node (fndecl
);
14470 TREE_CHAIN (fndecl
) = NULL_TREE
;
14474 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14476 DECL_IN_AGGR_P (fndecl
) = 1;
14481 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14482 we can lay it out later, when and if its type becomes complete.
14484 Also handle constexpr variables where the initializer involves
14485 an unlowered PTRMEM_CST because the class isn't complete yet. */
14488 maybe_register_incomplete_var (tree var
)
14490 gcc_assert (VAR_P (var
));
14492 /* Keep track of variables with incomplete types. */
14493 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14494 && DECL_EXTERNAL (var
))
14496 tree inner_type
= TREE_TYPE (var
);
14498 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14499 inner_type
= TREE_TYPE (inner_type
);
14500 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14502 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14503 /* RTTI TD entries are created while defining the type_info. */
14504 || (TYPE_LANG_SPECIFIC (inner_type
)
14505 && TYPE_BEING_DEFINED (inner_type
)))
14507 incomplete_var iv
= {var
, inner_type
};
14508 vec_safe_push (incomplete_vars
, iv
);
14510 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14511 && decl_constant_var_p (var
)
14512 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14514 /* When the outermost open class is complete we can resolve any
14515 pointers-to-members. */
14516 tree context
= outermost_open_class ();
14517 incomplete_var iv
= {var
, context
};
14518 vec_safe_push (incomplete_vars
, iv
);
14523 /* Called when a class type (given by TYPE) is defined. If there are
14524 any existing VAR_DECLs whose type has been completed by this
14525 declaration, update them now. */
14528 complete_vars (tree type
)
14531 incomplete_var
*iv
;
14533 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14535 if (same_type_p (type
, iv
->incomplete_type
))
14537 tree var
= iv
->decl
;
14538 tree type
= TREE_TYPE (var
);
14540 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14541 == iv
->incomplete_type
)
14543 /* Complete the type of the variable. The VAR_DECL itself
14544 will be laid out in expand_expr. */
14545 complete_type (type
);
14546 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14549 if (DECL_INITIAL (var
)
14550 && decl_constant_var_p (var
))
14551 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14553 /* Remove this entry from the list. */
14554 incomplete_vars
->unordered_remove (ix
);
14560 /* Check for pending declarations which may have abstract type. */
14561 complete_type_check_abstract (type
);
14564 /* If DECL is of a type which needs a cleanup, build and return an
14565 expression to perform that cleanup here. Return NULL_TREE if no
14566 cleanup need be done. */
14569 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14575 /* Assume no cleanup is required. */
14576 cleanup
= NULL_TREE
;
14578 if (error_operand_p (decl
))
14581 /* Handle "__attribute__((cleanup))". We run the cleanup function
14582 before the destructor since the destructor is what actually
14583 terminates the lifetime of the object. */
14584 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14591 /* Get the name specified by the user for the cleanup function. */
14592 id
= TREE_VALUE (TREE_VALUE (attr
));
14593 /* Look up the name to find the cleanup function to call. It is
14594 important to use lookup_name here because that is what is
14595 used in c-common.c:handle_cleanup_attribute when performing
14596 initial checks on the attribute. Note that those checks
14597 include ensuring that the function found is not an overloaded
14598 function, or an object with an overloaded call operator,
14599 etc.; we can rely on the fact that the function found is an
14600 ordinary FUNCTION_DECL. */
14601 fn
= lookup_name (id
);
14602 arg
= build_address (decl
);
14603 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14604 return error_mark_node
;
14605 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14606 if (cleanup
== error_mark_node
)
14607 return error_mark_node
;
14609 /* Handle ordinary C++ destructors. */
14610 type
= TREE_TYPE (decl
);
14611 if (type_build_dtor_call (type
))
14613 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14617 if (TREE_CODE (type
) == ARRAY_TYPE
)
14620 addr
= build_address (decl
);
14622 call
= build_delete (TREE_TYPE (addr
), addr
,
14623 sfk_complete_destructor
, flags
, 0, complain
);
14624 if (call
== error_mark_node
)
14625 cleanup
= error_mark_node
;
14626 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14627 /* Discard the call. */;
14629 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14634 /* build_delete sets the location of the destructor call to the
14635 current location, even though the destructor is going to be
14636 called later, at the end of the current scope. This can lead to
14637 a "jumpy" behaviour for users of debuggers when they step around
14638 the end of the block. So let's unset the location of the
14639 destructor call instead. */
14640 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14641 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14644 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14645 /* Treat objects with destructors as used; the destructor may do
14646 something substantive. */
14647 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14648 return error_mark_node
;
14654 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14655 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14656 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14659 static_fn_type (tree memfntype
)
14664 if (TYPE_PTRMEMFUNC_P (memfntype
))
14665 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14666 if (POINTER_TYPE_P (memfntype
)
14667 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14668 memfntype
= TREE_TYPE (memfntype
);
14669 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14671 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14672 args
= TYPE_ARG_TYPES (memfntype
);
14673 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14674 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14675 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14676 fntype
= (cp_build_type_attribute_variant
14677 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14678 fntype
= (build_exception_variant
14679 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14680 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14681 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14685 /* DECL was originally constructed as a non-static member function,
14686 but turned out to be static. Update it accordingly. */
14689 revert_static_member_fn (tree decl
)
14691 tree stype
= static_fn_type (decl
);
14692 cp_cv_quals quals
= type_memfn_quals (stype
);
14693 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14695 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14696 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14698 TREE_TYPE (decl
) = stype
;
14700 if (DECL_ARGUMENTS (decl
))
14701 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14702 DECL_STATIC_FUNCTION_P (decl
) = 1;
14705 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14706 one of the language-independent trees. */
14708 enum cp_tree_node_structure_enum
14709 cp_tree_node_structure (union lang_tree_node
* t
)
14711 switch (TREE_CODE (&t
->generic
))
14713 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14714 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14715 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14716 case OVERLOAD
: return TS_CP_OVERLOAD
;
14717 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14718 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14719 case BASELINK
: return TS_CP_BASELINK
;
14720 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14721 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14722 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14723 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14724 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14725 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14726 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14727 default: return TS_CP_GENERIC
;
14731 /* Build the void_list_node (void_type_node having been created). */
14733 build_void_list_node (void)
14735 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14740 cp_missing_noreturn_ok_p (tree decl
)
14742 /* A missing noreturn is ok for the `main' function. */
14743 return DECL_MAIN_P (decl
);
14746 /* Return the decl used to identify the COMDAT group into which DECL should
14750 cxx_comdat_group (tree decl
)
14752 /* Virtual tables, construction virtual tables, and virtual table
14753 tables all go in a single COMDAT group, named after the primary
14755 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14756 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14757 /* For all other DECLs, the COMDAT group is the mangled name of the
14758 declaration itself. */
14761 while (DECL_THUNK_P (decl
))
14763 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14764 into the same section as the target function. In that case
14765 we must return target's name. */
14766 tree target
= THUNK_TARGET (decl
);
14767 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14768 && DECL_SECTION_NAME (target
) != NULL
14769 && DECL_ONE_ONLY (target
))
14779 /* Returns the return type for FN as written by the user, which may include
14780 a placeholder for a deduced return type. */
14783 fndecl_declared_return_type (tree fn
)
14785 fn
= STRIP_TEMPLATE (fn
);
14786 if (FNDECL_USED_AUTO (fn
))
14788 struct language_function
*f
= NULL
;
14789 if (DECL_STRUCT_FUNCTION (fn
))
14790 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14792 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14793 return f
->x_auto_return_pattern
;
14795 return TREE_TYPE (TREE_TYPE (fn
));
14798 /* Returns true iff DECL was declared with an auto return type and it has
14799 not yet been deduced to a real type. */
14802 undeduced_auto_decl (tree decl
)
14804 if (cxx_dialect
< cxx14
)
14806 return type_uses_auto (TREE_TYPE (decl
));
14809 /* Complain if DECL has an undeduced return type. */
14812 require_deduced_type (tree decl
)
14814 if (undeduced_auto_decl (decl
))
14815 error ("use of %qD before deduction of %<auto%>", decl
);
14818 #include "gt-cp-decl.h"