1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2013 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"
34 #include "stringpool.h"
35 #include "stor-layout.h"
41 #include "tree-iterator.h"
42 #include "tree-inline.h"
49 #include "c-family/c-common.h"
50 #include "c-family/c-objc.h"
51 #include "c-family/c-pragma.h"
52 #include "c-family/c-target.h"
53 #include "c-family/c-ubsan.h"
54 #include "diagnostic.h"
58 #include "pointer-set.h"
59 #include "splay-tree.h"
64 /* Possible cases of bad specifiers type used by bad_specifiers. */
66 BSP_VAR
, /* variable */
67 BSP_PARM
, /* parameter */
72 static tree
grokparms (tree parmlist
, tree
*);
73 static const char *redeclaration_error_message (tree
, tree
);
75 static int decl_jump_unsafe (tree
);
76 static void require_complete_types_for_parms (tree
);
77 static int ambi_op_p (enum tree_code
);
78 static int unary_op_p (enum tree_code
);
79 static void push_local_name (tree
);
80 static tree
grok_reference_init (tree
, tree
, tree
, int);
81 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
83 static int check_static_variable_definition (tree
, tree
);
84 static void record_unknown_type (tree
, const char *);
85 static tree
builtin_function_1 (tree
, tree
, bool);
86 static int member_function_or_else (tree
, tree
, enum overload_flags
);
87 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
89 static void check_for_uninitialized_const_var (tree
);
90 static hashval_t
typename_hash (const void *);
91 static int typename_compare (const void *, const void *);
92 static tree
local_variable_p_walkfn (tree
*, int *, void *);
93 static tree
record_builtin_java_type (const char *, int);
94 static const char *tag_name (enum tag_types
);
95 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
96 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
97 static void maybe_deduce_size_from_array_init (tree
, tree
);
98 static void layout_var_decl (tree
);
99 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
100 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
101 static void save_function_data (tree
);
102 static void copy_type_enum (tree
, tree
);
103 static void check_function_type (tree
, tree
);
104 static void finish_constructor_body (void);
105 static void begin_destructor_body (void);
106 static void finish_destructor_body (void);
107 static void record_key_method_defined (tree
);
108 static tree
create_array_type_for_decl (tree
, tree
, tree
);
109 static tree
get_atexit_node (void);
110 static tree
get_dso_handle_node (void);
111 static tree
start_cleanup_fn (void);
112 static void end_cleanup_fn (void);
113 static tree
cp_make_fname_decl (location_t
, tree
, int);
114 static void initialize_predefined_identifiers (void);
115 static tree check_special_function_return_type
116 (special_function_kind
, tree
, tree
);
117 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
118 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
119 static void store_parm_decls (tree
);
120 static void initialize_local_var (tree
, tree
);
121 static void expand_static_init (tree
, tree
);
123 /* The following symbols are subsumed in the cp_global_trees array, and
124 listed here individually for documentation purposes.
127 tree wchar_decl_node;
129 tree vtable_entry_type;
130 tree delta_type_node;
131 tree __t_desc_type_node;
133 tree class_type_node;
134 tree unknown_type_node;
136 Array type `vtable_entry_type[]'
139 tree vtbl_ptr_type_node;
146 A FUNCTION_DECL which can call `abort'. Not necessarily the
147 one that the user will declare, but sufficient to be called
148 by routines that want to abort the program.
152 The FUNCTION_DECL for the default `::operator delete'.
154 tree global_delete_fndecl;
157 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
158 tree tinfo_var_id; */
160 tree cp_global_trees
[CPTI_MAX
];
162 /* Indicates that there is a type value in some namespace, although
163 that is not necessarily in scope at the moment. */
165 tree global_type_node
;
167 /* The node that holds the "name" of the global scope. */
168 tree global_scope_name
;
170 #define local_names cp_function_chain->x_local_names
172 /* A list of objects which have constructors or destructors
173 which reside in the global scope. The decl is stored in
174 the TREE_VALUE slot and the initializer is stored
175 in the TREE_PURPOSE slot. */
176 tree static_aggregates
;
178 /* Like static_aggregates, but for thread_local variables. */
183 /* A node for the integer constant 2. */
185 tree integer_two_node
;
187 /* Used only for jumps to as-yet undefined labels, since jumps to
188 defined labels can have their validity checked immediately. */
190 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
191 struct named_label_use_entry
*next
;
192 /* The binding level to which this entry is *currently* attached.
193 This is initially the binding level in which the goto appeared,
194 but is modified as scopes are closed. */
195 cp_binding_level
*binding_level
;
196 /* The head of the names list that was current when the goto appeared,
197 or the inner scope popped. These are the decls that will *not* be
198 skipped when jumping to the label. */
200 /* The location of the goto, for error reporting. */
201 location_t o_goto_locus
;
202 /* True if an OpenMP structured block scope has been closed since
203 the goto appeared. This means that the branch from the label will
204 illegally exit an OpenMP scope. */
208 /* A list of all LABEL_DECLs in the function that have names. Here so
209 we can clear out their names' definitions at the end of the
210 function, and so we can check the validity of jumps to these labels. */
212 struct GTY(()) named_label_entry
{
213 /* The decl itself. */
216 /* The binding level to which the label is *currently* attached.
217 This is initially set to the binding level in which the label
218 is defined, but is modified as scopes are closed. */
219 cp_binding_level
*binding_level
;
220 /* The head of the names list that was current when the label was
221 defined, or the inner scope popped. These are the decls that will
222 be skipped when jumping to the label. */
224 /* A vector of all decls from all binding levels that would be
225 crossed by a backward branch to the label. */
226 vec
<tree
, va_gc
> *bad_decls
;
228 /* A list of uses of the label, before the label is defined. */
229 struct named_label_use_entry
*uses
;
231 /* The following bits are set after the label is defined, and are
232 updated as scopes are popped. They indicate that a backward jump
233 to the label will illegally enter a scope of the given flavor. */
239 #define named_labels cp_function_chain->x_named_labels
241 /* The number of function bodies which we are currently processing.
242 (Zero if we are at namespace scope, one inside the body of a
243 function, two inside the body of a function in a local class, etc.) */
246 /* To avoid unwanted recursion, finish_function defers all mark_used calls
247 encountered during its execution until it finishes. */
248 bool defer_mark_used_calls
;
249 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
251 /* States indicating how grokdeclarator() should handle declspecs marked
252 with __attribute__((deprecated)). An object declared as
253 __attribute__((deprecated)) suppresses warnings of uses of other
255 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
258 /* A list of VAR_DECLs whose type was incomplete at the time the
259 variable was declared. */
261 typedef struct GTY(()) incomplete_var_d
{
263 tree incomplete_type
;
267 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
269 /* Returns the kind of template specialization we are currently
270 processing, given that it's declaration contained N_CLASS_SCOPES
271 explicit scope qualifications. */
274 current_tmpl_spec_kind (int n_class_scopes
)
276 int n_template_parm_scopes
= 0;
277 int seen_specialization_p
= 0;
278 int innermost_specialization_p
= 0;
281 /* Scan through the template parameter scopes. */
282 for (b
= current_binding_level
;
283 b
->kind
== sk_template_parms
;
286 /* If we see a specialization scope inside a parameter scope,
287 then something is wrong. That corresponds to a declaration
290 template <class T> template <> ...
292 which is always invalid since [temp.expl.spec] forbids the
293 specialization of a class member template if the enclosing
294 class templates are not explicitly specialized as well. */
295 if (b
->explicit_spec_p
)
297 if (n_template_parm_scopes
== 0)
298 innermost_specialization_p
= 1;
300 seen_specialization_p
= 1;
302 else if (seen_specialization_p
== 1)
303 return tsk_invalid_member_spec
;
305 ++n_template_parm_scopes
;
308 /* Handle explicit instantiations. */
309 if (processing_explicit_instantiation
)
311 if (n_template_parm_scopes
!= 0)
312 /* We've seen a template parameter list during an explicit
313 instantiation. For example:
315 template <class T> template void f(int);
317 This is erroneous. */
318 return tsk_invalid_expl_inst
;
320 return tsk_expl_inst
;
323 if (n_template_parm_scopes
< n_class_scopes
)
324 /* We've not seen enough template headers to match all the
325 specialized classes present. For example:
327 template <class T> void R<T>::S<T>::f(int);
329 This is invalid; there needs to be one set of template
330 parameters for each class. */
331 return tsk_insufficient_parms
;
332 else if (n_template_parm_scopes
== n_class_scopes
)
333 /* We're processing a non-template declaration (even though it may
334 be a member of a template class.) For example:
336 template <class T> void S<T>::f(int);
338 The `class T' matches the `S<T>', leaving no template headers
339 corresponding to the `f'. */
341 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
342 /* We've got too many template headers. For example:
344 template <> template <class T> void f (T);
346 There need to be more enclosing classes. */
347 return tsk_excessive_parms
;
349 /* This must be a template. It's of the form:
351 template <class T> template <class U> void S<T>::f(U);
353 This is a specialization if the innermost level was a
354 specialization; otherwise it's just a definition of the
356 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
359 /* Exit the current scope. */
367 /* When a label goes out of scope, check to see if that label was used
368 in a valid manner, and issue any appropriate warnings or errors. */
371 pop_label (tree label
, tree old_value
)
373 if (!processing_template_decl
)
375 if (DECL_INITIAL (label
) == NULL_TREE
)
379 error ("label %q+D used but not defined", label
);
380 location
= input_location
; /* FIXME want (input_filename, (line)0) */
381 /* Avoid crashing later. */
382 define_label (location
, DECL_NAME (label
));
385 warn_for_unused_label (label
);
388 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
391 /* At the end of a function, all labels declared within the function
392 go out of scope. BLOCK is the top-level block for the
396 pop_labels_1 (void **slot
, void *data
)
398 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
399 tree block
= (tree
) data
;
401 pop_label (ent
->label_decl
, NULL_TREE
);
403 /* Put the labels into the "variables" of the top-level block,
404 so debugger can see them. */
405 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
406 BLOCK_VARS (block
) = ent
->label_decl
;
408 htab_clear_slot (named_labels
, slot
);
414 pop_labels (tree block
)
418 htab_traverse (named_labels
, pop_labels_1
, block
);
423 /* At the end of a block with local labels, restore the outer definition. */
426 pop_local_label (tree label
, tree old_value
)
428 struct named_label_entry dummy
;
431 pop_label (label
, old_value
);
433 dummy
.label_decl
= label
;
434 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
435 htab_clear_slot (named_labels
, slot
);
438 /* The following two routines are used to interface to Objective-C++.
439 The binding level is purposely treated as an opaque type. */
442 objc_get_current_scope (void)
444 return current_binding_level
;
447 /* The following routine is used by the NeXT-style SJLJ exceptions;
448 variables get marked 'volatile' so as to not be clobbered by
449 _setjmp()/_longjmp() calls. All variables in the current scope,
450 as well as parent scopes up to (but not including) ENCLOSING_BLK
451 shall be thusly marked. */
454 objc_mark_locals_volatile (void *enclosing_blk
)
456 cp_binding_level
*scope
;
458 for (scope
= current_binding_level
;
459 scope
&& scope
!= enclosing_blk
;
460 scope
= scope
->level_chain
)
464 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
465 objc_volatilize_decl (decl
);
467 /* Do not climb up past the current function. */
468 if (scope
->kind
== sk_function_parms
)
473 /* Update data for defined and undefined labels when leaving a scope. */
476 poplevel_named_label_1 (void **slot
, void *data
)
478 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
479 cp_binding_level
*bl
= (cp_binding_level
*) data
;
480 cp_binding_level
*obl
= bl
->level_chain
;
482 if (ent
->binding_level
== bl
)
486 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
487 TREE_LISTs representing OVERLOADs, so be careful. */
488 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
490 : TREE_CHAIN (decl
)))
491 if (decl_jump_unsafe (decl
))
492 vec_safe_push (ent
->bad_decls
, decl
);
494 ent
->binding_level
= obl
;
495 ent
->names_in_scope
= obl
->names
;
499 ent
->in_try_scope
= true;
502 ent
->in_catch_scope
= true;
505 ent
->in_omp_scope
= true;
513 struct named_label_use_entry
*use
;
515 for (use
= ent
->uses
; use
; use
= use
->next
)
516 if (use
->binding_level
== bl
)
518 use
->binding_level
= obl
;
519 use
->names_in_scope
= obl
->names
;
520 if (bl
->kind
== sk_omp
)
521 use
->in_omp_scope
= true;
528 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
529 when errors were reported, except for -Werror-unused-but-set-*. */
530 static int unused_but_set_errorcount
;
532 /* Exit a binding level.
533 Pop the level off, and restore the state of the identifier-decl mappings
534 that were in effect when this level was entered.
536 If KEEP == 1, this level had explicit declarations, so
537 and create a "block" (a BLOCK node) for the level
538 to record its declarations and subblocks for symbol table output.
540 If FUNCTIONBODY is nonzero, this level is the body of a function,
541 so create a block as if KEEP were set and also clear out all
544 If REVERSE is nonzero, reverse the order of decls before putting
545 them into the BLOCK. */
548 poplevel (int keep
, int reverse
, int functionbody
)
551 /* The chain of decls was accumulated in reverse order.
552 Put it into forward order, just for cleanliness. */
557 int leaving_for_scope
;
560 cp_label_binding
*label_bind
;
562 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
567 gcc_assert (current_binding_level
->kind
!= sk_class
);
569 if (current_binding_level
->kind
== sk_cleanup
)
571 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
573 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
575 /* We used to use KEEP == 2 to indicate that the new block should go
576 at the beginning of the list of blocks at this binding level,
577 rather than the end. This hack is no longer used. */
578 gcc_assert (keep
== 0 || keep
== 1);
580 if (current_binding_level
->keep
)
583 /* Any uses of undefined labels, and any defined labels, now operate
584 under constraints of next binding contour. */
585 if (cfun
&& !functionbody
&& named_labels
)
586 htab_traverse (named_labels
, poplevel_named_label_1
,
587 current_binding_level
);
589 /* Get the decls in the order they were written.
590 Usually current_binding_level->names is in reverse order.
591 But parameter decls were previously put in forward order. */
594 current_binding_level
->names
595 = decls
= nreverse (current_binding_level
->names
);
597 decls
= current_binding_level
->names
;
599 /* If there were any declarations or structure tags in that level,
600 or if this level is a function body,
601 create a BLOCK to record them for the life of this function. */
603 if (keep
== 1 || functionbody
)
604 block
= make_node (BLOCK
);
605 if (block
!= NULL_TREE
)
607 BLOCK_VARS (block
) = decls
;
608 BLOCK_SUBBLOCKS (block
) = subblocks
;
611 /* In each subblock, record that this is its superior. */
613 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
614 BLOCK_SUPERCONTEXT (link
) = block
;
616 /* We still support the old for-scope rules, whereby the variables
617 in a for-init statement were in scope after the for-statement
618 ended. We only use the new rules if flag_new_for_scope is
621 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
623 /* Before we remove the declarations first check for unused variables. */
624 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
625 && !processing_template_decl
)
626 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
628 /* There are cases where D itself is a TREE_LIST. See in
629 push_local_binding where the list of decls returned by
630 getdecls is built. */
631 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
632 // See through references for improved -Wunused-variable (PR 38958).
633 tree type
= non_reference (TREE_TYPE (decl
));
635 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
636 && ! DECL_IN_SYSTEM_HEADER (decl
)
637 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
638 && type
!= error_mark_node
639 && (!CLASS_TYPE_P (type
)
640 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
641 || lookup_attribute ("warn_unused",
642 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
644 if (! TREE_USED (decl
))
645 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
646 else if (DECL_CONTEXT (decl
) == current_function_decl
647 // For -Wunused-but-set-variable leave references alone.
648 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
649 && errorcount
== unused_but_set_errorcount
)
651 warning (OPT_Wunused_but_set_variable
,
652 "variable %q+D set but not used", decl
);
653 unused_but_set_errorcount
= errorcount
;
658 /* Remove declarations for all the DECLs in this level. */
659 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
661 if (leaving_for_scope
&& VAR_P (link
)
662 /* It's hard to make this ARM compatibility hack play nicely with
663 lambdas, and it really isn't necessary in C++11 mode. */
664 && cxx_dialect
< cxx11
667 tree name
= DECL_NAME (link
);
671 ob
= outer_binding (name
,
672 IDENTIFIER_BINDING (name
),
675 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
677 ns_binding
= NULL_TREE
;
679 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
680 /* We have something like:
685 and we are leaving the `for' scope. There's no reason to
686 keep the binding of the inner `i' in this case. */
687 pop_binding (name
, link
);
688 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
689 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
690 /* Here, we have something like:
698 We must pop the for-scope binding so we know what's a
699 type and what isn't. */
700 pop_binding (name
, link
);
703 /* Mark this VAR_DECL as dead so that we can tell we left it
704 there only for backward compatibility. */
705 DECL_DEAD_FOR_LOCAL (link
) = 1;
707 /* Keep track of what should have happened when we
708 popped the binding. */
711 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
712 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
715 /* Add it to the list of dead variables in the next
716 outermost binding to that we can remove these when we
717 leave that binding. */
719 current_binding_level
->level_chain
->dead_vars_from_for
,
722 /* Although we don't pop the cxx_binding, we do clear
723 its SCOPE since the scope is going away now. */
724 IDENTIFIER_BINDING (name
)->scope
725 = current_binding_level
->level_chain
;
732 /* Remove the binding. */
735 if (TREE_CODE (decl
) == TREE_LIST
)
736 decl
= TREE_VALUE (decl
);
739 if (TREE_CODE (name
) == OVERLOAD
)
740 name
= OVL_FUNCTION (name
);
742 gcc_assert (DECL_P (name
));
743 pop_binding (DECL_NAME (name
), decl
);
747 /* Remove declarations for any `for' variables from inner scopes
748 that we kept around. */
749 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
751 pop_binding (DECL_NAME (decl
), decl
);
753 /* Restore the IDENTIFIER_TYPE_VALUEs. */
754 for (link
= current_binding_level
->type_shadowed
;
755 link
; link
= TREE_CHAIN (link
))
756 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
758 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
759 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
761 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
763 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
764 list if a `using' declaration put them there. The debugging
765 back ends won't understand OVERLOAD, so we remove them here.
766 Because the BLOCK_VARS are (temporarily) shared with
767 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
768 popped all the bindings. */
773 for (d
= &BLOCK_VARS (block
); *d
; )
775 if (TREE_CODE (*d
) == TREE_LIST
)
776 *d
= TREE_CHAIN (*d
);
778 d
= &DECL_CHAIN (*d
);
782 /* If the level being exited is the top level of a function,
783 check over all the labels. */
786 /* Since this is the top level block of a function, the vars are
787 the function's parameters. Don't leave them in the BLOCK
788 because they are found in the FUNCTION_DECL instead. */
789 BLOCK_VARS (block
) = 0;
793 kind
= current_binding_level
->kind
;
794 if (kind
== sk_cleanup
)
798 /* If this is a temporary binding created for a cleanup, then we'll
799 have pushed a statement list level. Pop that, create a new
800 BIND_EXPR for the block, and insert it into the stream. */
801 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
802 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
809 /* The current function is being defined, so its DECL_INITIAL
810 should be error_mark_node. */
811 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
812 DECL_INITIAL (current_function_decl
) = block
;
815 current_binding_level
->blocks
816 = block_chainon (current_binding_level
->blocks
, block
);
818 /* If we did not make a block for the level just exited,
819 any blocks made for inner levels
820 (since they cannot be recorded as subblocks in that level)
821 must be carried forward so they will later become subblocks
822 of something else. */
824 current_binding_level
->blocks
825 = block_chainon (current_binding_level
->blocks
, subblocks
);
827 /* Each and every BLOCK node created here in `poplevel' is important
828 (e.g. for proper debugging information) so if we created one
829 earlier, mark it as "used". */
831 TREE_USED (block
) = 1;
833 /* All temporary bindings created for cleanups are popped silently. */
834 if (kind
== sk_cleanup
)
837 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
841 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
842 itself, calling F for each. The DATA is passed to F as well. */
845 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
848 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
850 result
|= (*f
) (name_space
, data
);
852 for (; current
; current
= DECL_CHAIN (current
))
853 result
|= walk_namespaces_r (current
, f
, data
);
858 /* Walk all the namespaces, calling F for each. The DATA is passed to
862 walk_namespaces (walk_namespaces_fn f
, void* data
)
864 return walk_namespaces_r (global_namespace
, f
, data
);
867 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
868 DATA is non-NULL, this is the last time we will call
869 wrapup_global_declarations for this NAMESPACE. */
872 wrapup_globals_for_namespace (tree name_space
, void* data
)
874 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
875 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
876 tree
*vec
= statics
->address ();
877 int len
= statics
->length ();
878 int last_time
= (data
!= 0);
882 check_global_declarations (vec
, len
);
883 emit_debug_global_declarations (vec
, len
);
887 /* Write out any globals that need to be output. */
888 return wrapup_global_declarations (vec
, len
);
892 /* In C++, you don't have to write `struct S' to refer to `S'; you
893 can just use `S'. We accomplish this by creating a TYPE_DECL as
894 if the user had written `typedef struct S S'. Create and return
895 the TYPE_DECL for TYPE. */
898 create_implicit_typedef (tree name
, tree type
)
902 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
903 DECL_ARTIFICIAL (decl
) = 1;
904 /* There are other implicit type declarations, like the one *within*
905 a class that allows you to write `S::S'. We must distinguish
907 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
908 TYPE_NAME (type
) = decl
;
909 TYPE_STUB_DECL (type
) = decl
;
914 /* Remember a local name for name-mangling purposes. */
917 push_local_name (tree decl
)
922 timevar_start (TV_NAME_LOOKUP
);
924 name
= DECL_NAME (decl
);
926 nelts
= vec_safe_length (local_names
);
927 for (i
= 0; i
< nelts
; i
++)
929 t
= (*local_names
)[i
];
930 if (DECL_NAME (t
) == name
)
932 if (!DECL_LANG_SPECIFIC (decl
))
933 retrofit_lang_decl (decl
);
934 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
935 if (DECL_DISCRIMINATOR_SET_P (t
))
936 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
938 DECL_DISCRIMINATOR (decl
) = 1;
940 (*local_names
)[i
] = decl
;
941 timevar_stop (TV_NAME_LOOKUP
);
946 vec_safe_push (local_names
, decl
);
947 timevar_stop (TV_NAME_LOOKUP
);
950 /* Subroutine of duplicate_decls: return truthvalue of whether
951 or not types of these decls match.
953 For C++, we must compare the parameter list so that `int' can match
954 `int&' in a parameter position, but `int&' is not confused with
958 decls_match (tree newdecl
, tree olddecl
)
962 if (newdecl
== olddecl
)
965 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
966 /* If the two DECLs are not even the same kind of thing, we're not
967 interested in their types. */
970 gcc_assert (DECL_P (newdecl
));
972 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
974 tree f1
= TREE_TYPE (newdecl
);
975 tree f2
= TREE_TYPE (olddecl
);
976 tree p1
= TYPE_ARG_TYPES (f1
);
977 tree p2
= TYPE_ARG_TYPES (f2
);
980 /* Specializations of different templates are different functions
981 even if they have the same type. */
982 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
983 ? DECL_TI_TEMPLATE (newdecl
)
985 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
986 ? DECL_TI_TEMPLATE (olddecl
)
991 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
992 && ! (DECL_EXTERN_C_P (newdecl
)
993 && DECL_EXTERN_C_P (olddecl
)))
996 /* A new declaration doesn't match a built-in one unless it
997 is also extern "C". */
998 if (DECL_IS_BUILTIN (olddecl
)
999 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1002 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1005 /* A declaration with deduced return type should use its pre-deduction
1006 type for declaration matching. */
1007 r2
= fndecl_declared_return_type (olddecl
);
1009 if (same_type_p (TREE_TYPE (f1
), r2
))
1011 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1012 && (DECL_BUILT_IN (olddecl
)
1013 #ifndef NO_IMPLICIT_EXTERN_C
1014 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1015 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1019 types_match
= self_promoting_args_p (p1
);
1020 if (p1
== void_list_node
)
1021 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1023 #ifndef NO_IMPLICIT_EXTERN_C
1024 else if (!prototype_p (f1
)
1025 && (DECL_EXTERN_C_P (olddecl
)
1026 && DECL_IN_SYSTEM_HEADER (olddecl
)
1027 && !DECL_CLASS_SCOPE_P (olddecl
))
1028 && (DECL_EXTERN_C_P (newdecl
)
1029 && DECL_IN_SYSTEM_HEADER (newdecl
)
1030 && !DECL_CLASS_SCOPE_P (newdecl
)))
1032 types_match
= self_promoting_args_p (p2
);
1033 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1039 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1040 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1041 || comp_type_attributes (TREE_TYPE (newdecl
),
1042 TREE_TYPE (olddecl
)) != 0);
1047 /* The decls dont match if they correspond to two different versions
1048 of the same function. Disallow extern "C" functions to be
1049 versions for now. */
1051 && !DECL_EXTERN_C_P (newdecl
)
1052 && !DECL_EXTERN_C_P (olddecl
)
1053 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1055 /* Mark functions as versions if necessary. Modify the mangled decl
1056 name if necessary. */
1057 if (DECL_FUNCTION_VERSIONED (newdecl
)
1058 && DECL_FUNCTION_VERSIONED (olddecl
))
1060 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1062 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1063 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1064 mangle_decl (newdecl
);
1066 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1068 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1069 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1070 mangle_decl (olddecl
);
1072 record_function_versions (olddecl
, newdecl
);
1076 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1078 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1079 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1082 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1083 DECL_TEMPLATE_PARMS (olddecl
)))
1086 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1087 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1088 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1090 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1091 DECL_TEMPLATE_RESULT (newdecl
));
1095 /* Need to check scope for variable declaration (VAR_DECL).
1096 For typedef (TYPE_DECL), scope is ignored. */
1098 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1100 Two declarations for an object with C language linkage
1101 with the same name (ignoring the namespace that qualify
1102 it) that appear in different namespace scopes refer to
1104 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1107 if (TREE_TYPE (newdecl
) == error_mark_node
)
1108 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1109 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1110 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1111 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1114 types_match
= comptypes (TREE_TYPE (newdecl
),
1115 TREE_TYPE (olddecl
),
1116 COMPARE_REDECLARATION
);
1122 /* If NEWDECL is `static' and an `extern' was seen previously,
1123 warn about it. OLDDECL is the previous declaration.
1125 Note that this does not apply to the C++ case of declaring
1126 a variable `extern const' and then later `const'.
1128 Don't complain about built-in functions, since they are beyond
1129 the user's control. */
1132 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1134 if (TREE_CODE (newdecl
) == TYPE_DECL
1135 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1136 || TREE_CODE (newdecl
) == CONST_DECL
1137 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1140 /* Don't get confused by static member functions; that's a different
1142 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1143 && DECL_STATIC_FUNCTION_P (newdecl
))
1146 /* If the old declaration was `static', or the new one isn't, then
1147 everything is OK. */
1148 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1151 /* It's OK to declare a builtin function as `static'. */
1152 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1153 && DECL_ARTIFICIAL (olddecl
))
1156 if (permerror (input_location
,
1157 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1158 inform (input_location
, "previous declaration of %q+D", olddecl
);
1161 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1162 function templates. If their exception specifications do not
1163 match, issue a diagnostic. */
1166 check_redeclaration_exception_specification (tree new_decl
,
1171 tree new_exceptions
;
1172 tree old_exceptions
;
1174 new_type
= TREE_TYPE (new_decl
);
1175 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1176 old_type
= TREE_TYPE (old_decl
);
1177 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1181 If any declaration of a function has an exception-specification,
1182 all declarations, including the definition and an explicit
1183 specialization, of that function shall have an
1184 exception-specification with the same set of type-ids. */
1185 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1186 && ! DECL_IS_BUILTIN (old_decl
)
1188 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1190 error ("declaration of %qF has a different exception specifier",
1192 error ("from previous declaration %q+F", old_decl
);
1196 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1197 Otherwise issue diagnostics. */
1200 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1202 old_decl
= STRIP_TEMPLATE (old_decl
);
1203 new_decl
= STRIP_TEMPLATE (new_decl
);
1204 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1205 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1207 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1208 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1210 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1212 if (DECL_BUILT_IN (old_decl
))
1214 /* Hide a built-in declaration. */
1215 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1216 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1219 /* 7.1.5 [dcl.constexpr]
1220 Note: An explicit specialization can differ from the template
1221 declaration with respect to the constexpr specifier. */
1222 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1223 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1226 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1227 error ("from previous declaration %q+D", old_decl
);
1233 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1234 && lookup_attribute ("gnu_inline", \
1235 DECL_ATTRIBUTES (fn)))
1237 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1238 If the redeclaration is invalid, a diagnostic is issued, and the
1239 error_mark_node is returned. Otherwise, OLDDECL is returned.
1241 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1244 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1247 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1249 unsigned olddecl_uid
= DECL_UID (olddecl
);
1250 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1251 int new_defines_function
= 0;
1252 tree new_template_info
;
1254 if (newdecl
== olddecl
)
1257 types_match
= decls_match (newdecl
, olddecl
);
1259 /* If either the type of the new decl or the type of the old decl is an
1260 error_mark_node, then that implies that we have already issued an
1261 error (earlier) for some bogus type specification, and in that case,
1262 it is rather pointless to harass the user with yet more error message
1263 about the same declaration, so just pretend the types match here. */
1264 if (TREE_TYPE (newdecl
) == error_mark_node
1265 || TREE_TYPE (olddecl
) == error_mark_node
)
1266 return error_mark_node
;
1268 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1269 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1271 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1272 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1273 && check_raw_literal_operator (olddecl
))
1274 error ("literal operator template %q+D conflicts with"
1275 " raw literal operator %qD", newdecl
, olddecl
);
1276 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1277 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1278 && check_raw_literal_operator (newdecl
))
1279 error ("raw literal operator %q+D conflicts with"
1280 " literal operator template %qD", newdecl
, olddecl
);
1283 if (DECL_P (olddecl
)
1284 && TREE_CODE (newdecl
) == FUNCTION_DECL
1285 && TREE_CODE (olddecl
) == FUNCTION_DECL
1286 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1288 if (DECL_DECLARED_INLINE_P (newdecl
)
1289 && DECL_UNINLINABLE (newdecl
)
1290 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1291 /* Already warned elsewhere. */;
1292 else if (DECL_DECLARED_INLINE_P (olddecl
)
1293 && DECL_UNINLINABLE (olddecl
)
1294 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1295 /* Already warned. */;
1296 else if (DECL_DECLARED_INLINE_P (newdecl
)
1297 && DECL_UNINLINABLE (olddecl
)
1298 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1300 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1302 inform (input_location
, "previous declaration of %q+D "
1303 "with attribute noinline", olddecl
);
1305 else if (DECL_DECLARED_INLINE_P (olddecl
)
1306 && DECL_UNINLINABLE (newdecl
)
1307 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1309 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1310 "attribute noinline", newdecl
))
1311 inform (input_location
, "previous declaration of %q+D was inline",
1316 /* Check for redeclaration and other discrepancies. */
1317 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1318 && DECL_ARTIFICIAL (olddecl
))
1320 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1321 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1323 /* Avoid warnings redeclaring built-ins which have not been
1324 explicitly declared. */
1325 if (DECL_ANTICIPATED (olddecl
))
1328 /* If you declare a built-in or predefined function name as static,
1329 the old definition is overridden, but optionally warn this was a
1330 bad choice of name. */
1331 if (! TREE_PUBLIC (newdecl
))
1333 warning (OPT_Wshadow
,
1334 DECL_BUILT_IN (olddecl
)
1335 ? G_("shadowing built-in function %q#D")
1336 : G_("shadowing library function %q#D"), olddecl
);
1337 /* Discard the old built-in function. */
1340 /* If the built-in is not ansi, then programs can override
1341 it even globally without an error. */
1342 else if (! DECL_BUILT_IN (olddecl
))
1343 warning (0, "library function %q#D redeclared as non-function %q#D",
1347 error ("declaration of %q#D", newdecl
);
1348 error ("conflicts with built-in declaration %q#D",
1353 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1355 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1356 error_at (DECL_SOURCE_LOCATION (newdecl
),
1357 "redeclaration of %<pragma omp declare reduction%>");
1358 error_at (DECL_SOURCE_LOCATION (olddecl
),
1359 "previous %<pragma omp declare reduction%> declaration");
1360 return error_mark_node
;
1362 else if (!types_match
)
1364 /* Avoid warnings redeclaring built-ins which have not been
1365 explicitly declared. */
1366 if (DECL_ANTICIPATED (olddecl
))
1368 /* Deal with fileptr_type_node. FILE type is not known
1369 at the time we create the builtins. */
1372 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1373 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1375 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1378 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1380 tree t
= TREE_VALUE (t1
);
1383 && TYPE_NAME (TREE_TYPE (t
))
1384 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1385 == get_identifier ("FILE")
1386 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1388 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1390 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1391 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1392 types_match
= decls_match (newdecl
, olddecl
);
1394 return duplicate_decls (newdecl
, olddecl
,
1396 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1399 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1402 else if ((DECL_EXTERN_C_P (newdecl
)
1403 && DECL_EXTERN_C_P (olddecl
))
1404 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1405 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1407 /* A near match; override the builtin. */
1409 if (TREE_PUBLIC (newdecl
))
1411 warning (0, "new declaration %q#D", newdecl
);
1412 warning (0, "ambiguates built-in declaration %q#D",
1416 warning (OPT_Wshadow
,
1417 DECL_BUILT_IN (olddecl
)
1418 ? G_("shadowing built-in function %q#D")
1419 : G_("shadowing library function %q#D"), olddecl
);
1422 /* Discard the old built-in function. */
1425 /* Replace the old RTL to avoid problems with inlining. */
1426 COPY_DECL_RTL (newdecl
, olddecl
);
1428 /* Even if the types match, prefer the new declarations type for
1429 built-ins which have not been explicitly declared, for
1430 exception lists, etc... */
1431 else if (DECL_IS_BUILTIN (olddecl
))
1433 tree type
= TREE_TYPE (newdecl
);
1434 tree attribs
= (*targetm
.merge_type_attributes
)
1435 (TREE_TYPE (olddecl
), type
);
1437 type
= cp_build_type_attribute_variant (type
, attribs
);
1438 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1441 /* If a function is explicitly declared "throw ()", propagate that to
1442 the corresponding builtin. */
1443 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1444 && DECL_ANTICIPATED (olddecl
)
1445 && TREE_NOTHROW (newdecl
)
1446 && !TREE_NOTHROW (olddecl
))
1448 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1449 tree tmpdecl
= builtin_decl_explicit (fncode
);
1450 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1451 TREE_NOTHROW (tmpdecl
) = 1;
1454 /* Whether or not the builtin can throw exceptions has no
1455 bearing on this declarator. */
1456 TREE_NOTHROW (olddecl
) = 0;
1458 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1460 /* If a builtin function is redeclared as `static', merge
1461 the declarations, but make the original one static. */
1462 DECL_THIS_STATIC (olddecl
) = 1;
1463 TREE_PUBLIC (olddecl
) = 0;
1465 /* Make the old declaration consistent with the new one so
1466 that all remnants of the builtin-ness of this function
1467 will be banished. */
1468 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1469 COPY_DECL_RTL (newdecl
, olddecl
);
1472 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1474 /* C++ Standard, 3.3, clause 4:
1475 "[Note: a namespace name or a class template name must be unique
1476 in its declarative region (7.3.2, clause 14). ]" */
1477 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1478 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1479 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1480 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1481 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1482 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1484 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1485 && TREE_CODE (newdecl
) != TYPE_DECL
)
1486 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1487 && TREE_CODE (olddecl
) != TYPE_DECL
))
1489 /* We do nothing special here, because C++ does such nasty
1490 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1491 get shadowed, and know that if we need to find a TYPE_DECL
1492 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1493 slot of the identifier. */
1497 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1498 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1499 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1500 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1504 error ("%q#D redeclared as different kind of symbol", newdecl
);
1505 if (TREE_CODE (olddecl
) == TREE_LIST
)
1506 olddecl
= TREE_VALUE (olddecl
);
1507 inform (input_location
, "previous declaration of %q+#D", olddecl
);
1509 return error_mark_node
;
1511 else if (!types_match
)
1513 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1514 /* These are certainly not duplicate declarations; they're
1515 from different scopes. */
1518 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1520 /* The name of a class template may not be declared to refer to
1521 any other template, class, function, object, namespace, value,
1522 or type in the same scope. */
1523 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1524 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1526 error ("declaration of template %q#D", newdecl
);
1527 error ("conflicts with previous declaration %q+#D", olddecl
);
1528 return error_mark_node
;
1530 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1531 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1532 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1533 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1534 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1535 DECL_TEMPLATE_PARMS (olddecl
))
1536 /* Template functions can be disambiguated by
1538 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1539 TREE_TYPE (TREE_TYPE (olddecl
))))
1541 error ("new declaration %q#D", newdecl
);
1542 error ("ambiguates old declaration %q+#D", olddecl
);
1546 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1548 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1550 error ("declaration of C function %q#D conflicts with",
1552 error ("previous declaration %q+#D here", olddecl
);
1555 /* For function versions, params and types match, but they
1556 are not ambiguous. */
1557 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1558 && !DECL_FUNCTION_VERSIONED (olddecl
))
1559 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1560 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1562 error ("new declaration %q#D", newdecl
);
1563 error ("ambiguates old declaration %q+#D", olddecl
);
1564 return error_mark_node
;
1571 error ("conflicting declaration %q#D", newdecl
);
1572 inform (input_location
,
1573 "%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1574 return error_mark_node
;
1577 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1578 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1579 && (!DECL_TEMPLATE_INFO (newdecl
)
1580 || (DECL_TI_TEMPLATE (newdecl
)
1581 != DECL_TI_TEMPLATE (olddecl
))))
1582 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1583 && (!DECL_TEMPLATE_INFO (olddecl
)
1584 || (DECL_TI_TEMPLATE (olddecl
)
1585 != DECL_TI_TEMPLATE (newdecl
))))))
1586 /* It's OK to have a template specialization and a non-template
1587 with the same type, or to have specializations of two
1588 different templates with the same type. Note that if one is a
1589 specialization, and the other is an instantiation of the same
1590 template, that we do not exit at this point. That situation
1591 can occur if we instantiate a template class, and then
1592 specialize one of its methods. This situation is valid, but
1593 the declarations must be merged in the usual way. */
1595 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1596 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1597 && !DECL_USE_TEMPLATE (newdecl
))
1598 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1599 && !DECL_USE_TEMPLATE (olddecl
))))
1600 /* One of the declarations is a template instantiation, and the
1601 other is not a template at all. That's OK. */
1603 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1605 /* In [namespace.alias] we have:
1607 In a declarative region, a namespace-alias-definition can be
1608 used to redefine a namespace-alias declared in that declarative
1609 region to refer only to the namespace to which it already
1612 Therefore, if we encounter a second alias directive for the same
1613 alias, we can just ignore the second directive. */
1614 if (DECL_NAMESPACE_ALIAS (newdecl
)
1615 && (DECL_NAMESPACE_ALIAS (newdecl
)
1616 == DECL_NAMESPACE_ALIAS (olddecl
)))
1618 /* [namespace.alias]
1620 A namespace-name or namespace-alias shall not be declared as
1621 the name of any other entity in the same declarative region.
1622 A namespace-name defined at global scope shall not be
1623 declared as the name of any other entity in any global scope
1625 error ("declaration of namespace %qD conflicts with", newdecl
);
1626 error ("previous declaration of namespace %q+D here", olddecl
);
1627 return error_mark_node
;
1631 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1634 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1635 if (DECL_NAME (olddecl
) != NULL_TREE
)
1636 inform (input_location
,
1637 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1638 ? G_("%q+#D previously defined here")
1639 : G_("%q+#D previously declared here"), olddecl
);
1640 return error_mark_node
;
1642 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1643 && DECL_INITIAL (olddecl
) != NULL_TREE
1644 && !prototype_p (TREE_TYPE (olddecl
))
1645 && prototype_p (TREE_TYPE (newdecl
)))
1647 /* Prototype decl follows defn w/o prototype. */
1648 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1649 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1650 "follows non-prototype definition here");
1652 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1653 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1656 If two declarations of the same function or object
1657 specify different linkage-specifications ..., the program
1658 is ill-formed.... Except for functions with C++ linkage,
1659 a function declaration without a linkage specification
1660 shall not precede the first linkage specification for
1661 that function. A function can be declared without a
1662 linkage specification after an explicit linkage
1663 specification has been seen; the linkage explicitly
1664 specified in the earlier declaration is not affected by
1665 such a function declaration.
1667 DR 563 raises the question why the restrictions on
1668 functions should not also apply to objects. Older
1669 versions of G++ silently ignore the linkage-specification
1677 which is clearly wrong. Therefore, we now treat objects
1679 if (current_lang_depth () == 0)
1681 /* There is no explicit linkage-specification, so we use
1682 the linkage from the previous declaration. */
1683 if (!DECL_LANG_SPECIFIC (newdecl
))
1684 retrofit_lang_decl (newdecl
);
1685 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1689 error ("previous declaration of %q+#D with %qL linkage",
1690 olddecl
, DECL_LANGUAGE (olddecl
));
1691 error ("conflicts with new declaration with %qL linkage",
1692 DECL_LANGUAGE (newdecl
));
1696 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1698 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1700 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1701 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1704 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1705 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1707 for (; t1
&& t1
!= void_list_node
;
1708 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1709 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1711 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1714 permerror (input_location
, "default argument given for parameter %d of %q#D",
1716 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1720 error ("default argument given for parameter %d of %q#D",
1722 error ("after previous specification in %q+#D",
1729 /* Do not merge an implicit typedef with an explicit one. In:
1733 typedef class A A __attribute__ ((foo));
1735 the attribute should apply only to the typedef. */
1736 if (TREE_CODE (olddecl
) == TYPE_DECL
1737 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1738 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1741 /* If new decl is `static' and an `extern' was seen previously,
1743 warn_extern_redeclared_static (newdecl
, olddecl
);
1745 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1746 return error_mark_node
;
1748 /* We have committed to returning 1 at this point. */
1749 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1751 /* Now that functions must hold information normally held
1752 by field decls, there is extra work to do so that
1753 declaration information does not get destroyed during
1755 if (DECL_VINDEX (olddecl
))
1756 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1757 if (DECL_CONTEXT (olddecl
))
1758 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1759 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1760 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1761 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1762 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1763 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1764 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1765 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1766 SET_OVERLOADED_OPERATOR_CODE
1767 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1768 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1770 /* Optionally warn about more than one declaration for the same
1771 name, but don't warn about a function declaration followed by a
1773 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1774 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1775 /* Don't warn about extern decl followed by definition. */
1776 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1777 /* Don't warn about friends, let add_friend take care of it. */
1778 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1779 /* Don't warn about declaration followed by specialization. */
1780 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1781 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1783 if (warning (OPT_Wredundant_decls
,
1784 "redundant redeclaration of %qD in same scope",
1786 inform (input_location
, "previous declaration of %q+D", olddecl
);
1789 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1790 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1792 if (DECL_DELETED_FN (newdecl
))
1794 error ("deleted definition of %qD", newdecl
);
1795 error ("after previous declaration %q+D", olddecl
);
1797 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1801 /* Deal with C++: must preserve virtual function table size. */
1802 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1804 tree newtype
= TREE_TYPE (newdecl
);
1805 tree oldtype
= TREE_TYPE (olddecl
);
1807 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1808 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1809 CLASSTYPE_FRIEND_CLASSES (newtype
)
1810 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1812 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1815 /* Copy all the DECL_... slots specified in the new decl
1816 except for any that we copy here from the old type. */
1817 DECL_ATTRIBUTES (newdecl
)
1818 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1820 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1824 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1825 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1826 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1827 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1828 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1829 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1831 DECL_ATTRIBUTES (old_result
)
1832 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1834 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1836 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1837 && DECL_INITIAL (new_result
))
1839 if (DECL_INITIAL (old_result
))
1840 DECL_UNINLINABLE (old_result
) = 1;
1842 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1843 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1844 DECL_NOT_REALLY_EXTERN (old_result
)
1845 = DECL_NOT_REALLY_EXTERN (new_result
);
1846 DECL_INTERFACE_KNOWN (old_result
)
1847 = DECL_INTERFACE_KNOWN (new_result
);
1848 DECL_DECLARED_INLINE_P (old_result
)
1849 = DECL_DECLARED_INLINE_P (new_result
);
1850 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1851 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1856 DECL_DECLARED_INLINE_P (old_result
)
1857 |= DECL_DECLARED_INLINE_P (new_result
);
1858 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1859 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1860 check_redeclaration_exception_specification (newdecl
, olddecl
);
1864 /* If the new declaration is a definition, update the file and
1865 line information on the declaration, and also make
1866 the old declaration the same definition. */
1867 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1869 DECL_SOURCE_LOCATION (olddecl
)
1870 = DECL_SOURCE_LOCATION (old_result
)
1871 = DECL_SOURCE_LOCATION (newdecl
);
1872 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1873 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1876 DECL_ARGUMENTS (old_result
)
1877 = DECL_ARGUMENTS (new_result
);
1878 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1879 parm
= DECL_CHAIN (parm
))
1880 DECL_CONTEXT (parm
) = old_result
;
1889 /* Automatically handles default parameters. */
1890 tree oldtype
= TREE_TYPE (olddecl
);
1893 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1894 maybe_instantiate_noexcept (olddecl
);
1896 /* Merge the data types specified in the two decls. */
1897 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1899 /* If merge_types produces a non-typedef type, just use the old type. */
1900 if (TREE_CODE (newdecl
) == TYPE_DECL
1901 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1904 if (VAR_P (newdecl
))
1906 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1907 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1908 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1909 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1910 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1911 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1913 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1914 if (DECL_LANG_SPECIFIC (olddecl
)
1915 && CP_DECL_THREADPRIVATE_P (olddecl
))
1917 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1918 if (!DECL_LANG_SPECIFIC (newdecl
))
1919 retrofit_lang_decl (newdecl
);
1921 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1922 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1926 /* Do this after calling `merge_types' so that default
1927 parameters don't confuse us. */
1928 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1929 check_redeclaration_exception_specification (newdecl
, olddecl
);
1930 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1932 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1933 check_default_args (newdecl
);
1935 /* Lay the type out, unless already done. */
1936 if (! same_type_p (newtype
, oldtype
)
1937 && TREE_TYPE (newdecl
) != error_mark_node
1938 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1939 layout_type (TREE_TYPE (newdecl
));
1941 if ((VAR_P (newdecl
)
1942 || TREE_CODE (newdecl
) == PARM_DECL
1943 || TREE_CODE (newdecl
) == RESULT_DECL
1944 || TREE_CODE (newdecl
) == FIELD_DECL
1945 || TREE_CODE (newdecl
) == TYPE_DECL
)
1946 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1947 layout_decl (newdecl
, 0);
1949 /* Merge the type qualifiers. */
1950 if (TREE_READONLY (newdecl
))
1951 TREE_READONLY (olddecl
) = 1;
1952 if (TREE_THIS_VOLATILE (newdecl
))
1953 TREE_THIS_VOLATILE (olddecl
) = 1;
1954 if (TREE_NOTHROW (newdecl
))
1955 TREE_NOTHROW (olddecl
) = 1;
1957 /* Merge deprecatedness. */
1958 if (TREE_DEPRECATED (newdecl
))
1959 TREE_DEPRECATED (olddecl
) = 1;
1961 /* Preserve function specific target and optimization options */
1962 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1964 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1965 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1966 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1967 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1969 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1970 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1971 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1972 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1975 /* Merge the initialization information. */
1976 if (DECL_INITIAL (newdecl
) == NULL_TREE
1977 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1979 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1980 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1981 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1983 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1984 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1988 /* Merge the section attribute.
1989 We want to issue an error if the sections conflict but that must be
1990 done later in decl_attributes since we are called before attributes
1992 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1993 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1995 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1997 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1998 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1999 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2000 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2001 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2002 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2003 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2004 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2005 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2006 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2007 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2008 /* Keep the old RTL. */
2009 COPY_DECL_RTL (olddecl
, newdecl
);
2011 else if (VAR_P (newdecl
)
2012 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2014 /* Keep the old RTL. We cannot keep the old RTL if the old
2015 declaration was for an incomplete object and the new
2016 declaration is not since many attributes of the RTL will
2018 COPY_DECL_RTL (olddecl
, newdecl
);
2021 /* If cannot merge, then use the new type and qualifiers,
2022 and don't preserve the old rtl. */
2025 /* Clean out any memory we had of the old declaration. */
2026 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2028 TREE_VALUE (oldstatic
) = error_mark_node
;
2030 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2031 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2032 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2033 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2036 /* Merge the storage class information. */
2037 merge_weak (newdecl
, olddecl
);
2039 if (DECL_ONE_ONLY (olddecl
))
2040 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2042 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2043 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2044 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2045 if (! DECL_EXTERNAL (olddecl
))
2046 DECL_EXTERNAL (newdecl
) = 0;
2048 new_template_info
= NULL_TREE
;
2049 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2051 bool new_redefines_gnu_inline
= false;
2053 if (new_defines_function
2054 && ((DECL_INTERFACE_KNOWN (olddecl
)
2055 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2056 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2057 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2058 == FUNCTION_DECL
))))
2062 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2063 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2065 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2068 if (!new_redefines_gnu_inline
)
2070 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2071 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2072 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2074 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2075 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2076 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2078 /* If the OLDDECL is an instantiation and/or specialization,
2079 then the NEWDECL must be too. But, it may not yet be marked
2080 as such if the caller has created NEWDECL, but has not yet
2081 figured out that it is a redeclaration. */
2082 if (!DECL_USE_TEMPLATE (newdecl
))
2083 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2085 /* Don't really know how much of the language-specific
2086 values we should copy from old to new. */
2087 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2088 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2089 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2090 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2092 if (LANG_DECL_HAS_MIN (newdecl
))
2094 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2095 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2096 if (DECL_TEMPLATE_INFO (newdecl
))
2097 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2098 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2100 /* Only functions have these fields. */
2101 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2103 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2104 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2105 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2106 && DECL_HIDDEN_FRIEND_P (olddecl
)
2107 && newdecl_is_friend
);
2108 DECL_BEFRIENDING_CLASSES (newdecl
)
2109 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2110 DECL_BEFRIENDING_CLASSES (olddecl
));
2111 /* DECL_THUNKS is only valid for virtual functions,
2112 otherwise it is a DECL_FRIEND_CONTEXT. */
2113 if (DECL_VIRTUAL_P (newdecl
))
2114 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2116 /* Only variables have this field. */
2117 else if (VAR_P (newdecl
)
2118 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2119 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2122 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2126 /* Merge parameter attributes. */
2127 tree oldarg
, newarg
;
2128 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2129 newarg
= DECL_ARGUMENTS(newdecl
);
2131 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2132 DECL_ATTRIBUTES (newarg
)
2133 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2134 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2137 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2138 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2140 /* If newdecl is not a specialization, then it is not a
2141 template-related function at all. And that means that we
2142 should have exited above, returning 0. */
2143 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2145 if (DECL_ODR_USED (olddecl
))
2146 /* From [temp.expl.spec]:
2148 If a template, a member template or the member of a class
2149 template is explicitly specialized then that
2150 specialization shall be declared before the first use of
2151 that specialization that would cause an implicit
2152 instantiation to take place, in every translation unit in
2153 which such a use occurs. */
2154 error ("explicit specialization of %qD after first use",
2157 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2159 /* Don't propagate visibility from the template to the
2160 specialization here. We'll do that in determine_visibility if
2162 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2164 /* [temp.expl.spec/14] We don't inline explicit specialization
2165 just because the primary template says so. */
2167 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2168 the always_inline attribute. */
2169 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2170 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2172 if (DECL_DECLARED_INLINE_P (newdecl
))
2173 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2175 DECL_ATTRIBUTES (newdecl
)
2176 = remove_attribute ("always_inline",
2177 DECL_ATTRIBUTES (newdecl
));
2180 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2182 /* Never inline re-defined extern inline functions.
2183 FIXME: this could be better handled by keeping both
2184 function as separate declarations. */
2185 DECL_UNINLINABLE (newdecl
) = 1;
2189 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2190 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2192 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2194 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2195 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2197 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2198 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2199 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2200 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2203 /* Preserve abstractness on cloned [cd]tors. */
2204 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2206 /* Update newdecl's parms to point at olddecl. */
2207 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2208 parm
= DECL_CHAIN (parm
))
2209 DECL_CONTEXT (parm
) = olddecl
;
2213 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2214 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2215 COPY_DECL_RTL (newdecl
, olddecl
);
2217 if (! types_match
|| new_defines_function
)
2219 /* These need to be copied so that the names are available.
2220 Note that if the types do match, we'll preserve inline
2221 info and other bits, but if not, we won't. */
2222 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2223 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2225 /* If redeclaring a builtin function, it stays built in
2226 if newdecl is a gnu_inline definition, or if newdecl is just
2228 if (DECL_BUILT_IN (olddecl
)
2229 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2231 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2232 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2233 /* If we're keeping the built-in definition, keep the rtl,
2234 regardless of declaration matches. */
2235 COPY_DECL_RTL (olddecl
, newdecl
);
2236 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2238 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2241 /* If a compatible prototype of these builtin functions
2242 is seen, assume the runtime implements it with the
2243 expected semantics. */
2244 case BUILT_IN_STPCPY
:
2245 if (builtin_decl_explicit_p (fncode
))
2246 set_builtin_decl_implicit_p (fncode
, true);
2253 if (new_defines_function
)
2254 /* If defining a function declared with other language
2255 linkage, use the previously declared language linkage. */
2256 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2257 else if (types_match
)
2259 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2260 /* Don't clear out the arguments if we're just redeclaring a
2262 if (DECL_ARGUMENTS (olddecl
))
2263 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2266 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2267 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2269 /* Now preserve various other info from the definition. */
2270 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2271 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2272 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2273 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2275 /* Warn about conflicting visibility specifications. */
2276 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2277 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2278 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2280 warning_at (input_location
, OPT_Wattributes
,
2281 "%q+D: visibility attribute ignored because it", newdecl
);
2282 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2283 "conflicts with previous declaration here");
2285 /* Choose the declaration which specified visibility. */
2286 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2288 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2289 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2291 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2292 so keep this behavior. */
2293 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2295 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2296 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2298 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2299 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2301 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2302 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2304 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2305 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2306 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2308 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2309 with that from NEWDECL below. */
2310 if (DECL_LANG_SPECIFIC (olddecl
))
2312 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2313 != DECL_LANG_SPECIFIC (newdecl
));
2314 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2317 /* Merge the USED information. */
2318 if (TREE_USED (olddecl
))
2319 TREE_USED (newdecl
) = 1;
2320 else if (TREE_USED (newdecl
))
2321 TREE_USED (olddecl
) = 1;
2322 if (VAR_P (newdecl
))
2324 if (DECL_READ_P (olddecl
))
2325 DECL_READ_P (newdecl
) = 1;
2326 else if (DECL_READ_P (newdecl
))
2327 DECL_READ_P (olddecl
) = 1;
2329 if (DECL_PRESERVE_P (olddecl
))
2330 DECL_PRESERVE_P (newdecl
) = 1;
2331 else if (DECL_PRESERVE_P (newdecl
))
2332 DECL_PRESERVE_P (olddecl
) = 1;
2334 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2335 to olddecl and deleted. */
2336 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2337 && DECL_FUNCTION_VERSIONED (olddecl
))
2339 /* Set the flag for newdecl so that it gets copied to olddecl. */
2340 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2341 /* newdecl will be purged after copying to olddecl and is no longer
2343 delete_function_version (newdecl
);
2346 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2350 function_size
= sizeof (struct tree_decl_common
);
2352 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2353 (char *) newdecl
+ sizeof (struct tree_common
),
2354 function_size
- sizeof (struct tree_common
));
2356 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2357 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2358 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2359 if (new_template_info
)
2360 /* If newdecl is a template instantiation, it is possible that
2361 the following sequence of events has occurred:
2363 o A friend function was declared in a class template. The
2364 class template was instantiated.
2366 o The instantiation of the friend declaration was
2367 recorded on the instantiation list, and is newdecl.
2369 o Later, however, instantiate_class_template called pushdecl
2370 on the newdecl to perform name injection. But, pushdecl in
2371 turn called duplicate_decls when it discovered that another
2372 declaration of a global function with the same name already
2375 o Here, in duplicate_decls, we decided to clobber newdecl.
2377 If we're going to do that, we'd better make sure that
2378 olddecl, and not newdecl, is on the list of
2379 instantiations so that if we try to do the instantiation
2380 again we won't get the clobbered declaration. */
2381 reregister_specialization (newdecl
,
2387 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2388 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2389 (char *) newdecl
+ sizeof (struct tree_common
),
2390 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2391 switch (TREE_CODE (olddecl
))
2401 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2402 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2403 size
- sizeof (struct tree_decl_common
)
2404 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2408 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2409 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2410 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2411 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2415 DECL_UID (olddecl
) = olddecl_uid
;
2417 DECL_FRIEND_P (olddecl
) = 1;
2420 DECL_ANTICIPATED (olddecl
) = 1;
2421 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2424 /* NEWDECL contains the merged attribute lists.
2425 Update OLDDECL to be the same. */
2426 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2428 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2429 so that encode_section_info has a chance to look at the new decl
2430 flags and attributes. */
2431 if (DECL_RTL_SET_P (olddecl
)
2432 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2434 && TREE_STATIC (olddecl
))))
2435 make_decl_rtl (olddecl
);
2437 /* The NEWDECL will no longer be needed. Because every out-of-class
2438 declaration of a member results in a call to duplicate_decls,
2439 freeing these nodes represents in a significant savings. */
2445 /* Return zero if the declaration NEWDECL is valid
2446 when the declaration OLDDECL (assumed to be for the same name)
2447 has already been seen.
2448 Otherwise return an error message format string with a %s
2449 where the identifier should go. */
2452 redeclaration_error_message (tree newdecl
, tree olddecl
)
2454 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2456 /* Because C++ can put things into name space for free,
2457 constructs like "typedef struct foo { ... } foo"
2458 would look like an erroneous redeclaration. */
2459 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2462 return G_("redefinition of %q#D");
2464 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2466 /* If this is a pure function, its olddecl will actually be
2467 the original initialization to `0' (which we force to call
2468 abort()). Don't complain about redefinition in this case. */
2469 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2470 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2473 /* If both functions come from different namespaces, this is not
2474 a redeclaration - this is a conflict with a used function. */
2475 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2476 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2477 && ! decls_match (olddecl
, newdecl
))
2478 return G_("%qD conflicts with used function");
2480 /* We'll complain about linkage mismatches in
2481 warn_extern_redeclared_static. */
2483 /* Defining the same name twice is no good. */
2484 if (DECL_INITIAL (olddecl
) != NULL_TREE
2485 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2487 if (DECL_NAME (olddecl
) == NULL_TREE
)
2488 return G_("%q#D not declared in class");
2489 else if (!GNU_INLINE_P (olddecl
)
2490 || GNU_INLINE_P (newdecl
))
2491 return G_("redefinition of %q#D");
2494 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2496 bool olda
= GNU_INLINE_P (olddecl
);
2497 bool newa
= GNU_INLINE_P (newdecl
);
2502 return G_("%q+D redeclared inline with "
2503 "%<gnu_inline%> attribute");
2505 return G_("%q+D redeclared inline without "
2506 "%<gnu_inline%> attribute");
2510 check_abi_tag_redeclaration
2511 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2512 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2516 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2520 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2522 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2523 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2524 return G_("redefinition of %q#D");
2528 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2529 || (DECL_TEMPLATE_RESULT (newdecl
)
2530 == DECL_TEMPLATE_RESULT (olddecl
)))
2533 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2534 if (DECL_TEMPLATE_INFO (nt
))
2535 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2536 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2537 if (DECL_TEMPLATE_INFO (ot
))
2538 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2539 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2540 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2541 return G_("redefinition of %q#D");
2543 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2545 bool olda
= GNU_INLINE_P (ot
);
2546 bool newa
= GNU_INLINE_P (nt
);
2551 return G_("%q+D redeclared inline with "
2552 "%<gnu_inline%> attribute");
2554 return G_("%q+D redeclared inline without "
2555 "%<gnu_inline%> attribute");
2559 /* Core issue #226 (C++0x):
2561 If a friend function template declaration specifies a
2562 default template-argument, that declaration shall be a
2563 definition and shall be the only declaration of the
2564 function template in the translation unit. */
2565 if ((cxx_dialect
!= cxx98
)
2566 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2567 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2568 /*is_primary=*/true,
2569 /*is_partial=*/false,
2570 /*is_friend_decl=*/2))
2571 return G_("redeclaration of friend %q#D "
2572 "may not have default template arguments");
2576 else if (VAR_P (newdecl
)
2577 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2578 && (! DECL_LANG_SPECIFIC (olddecl
)
2579 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2580 || DECL_THREAD_LOCAL_P (newdecl
)))
2582 /* Only variables can be thread-local, and all declarations must
2583 agree on this property. */
2584 if (DECL_THREAD_LOCAL_P (newdecl
))
2585 return G_("thread-local declaration of %q#D follows "
2586 "non-thread-local declaration");
2588 return G_("non-thread-local declaration of %q#D follows "
2589 "thread-local declaration");
2591 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2593 /* The objects have been declared at namespace scope. If either
2594 is a member of an anonymous union, then this is an invalid
2595 redeclaration. For example:
2601 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2602 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2603 return G_("redeclaration of %q#D");
2604 /* If at least one declaration is a reference, there is no
2605 conflict. For example:
2611 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2613 /* Reject two definitions. */
2614 return G_("redefinition of %q#D");
2618 /* Objects declared with block scope: */
2619 /* Reject two definitions, and reject a definition
2620 together with an external reference. */
2621 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2622 return G_("redeclaration of %q#D");
2627 /* Hash and equality functions for the named_label table. */
2630 named_label_entry_hash (const void *data
)
2632 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2633 return DECL_UID (ent
->label_decl
);
2637 named_label_entry_eq (const void *a
, const void *b
)
2639 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2640 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2641 return ent_a
->label_decl
== ent_b
->label_decl
;
2644 /* Create a new label, named ID. */
2647 make_label_decl (tree id
, int local_p
)
2649 struct named_label_entry
*ent
;
2653 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2655 DECL_CONTEXT (decl
) = current_function_decl
;
2656 DECL_MODE (decl
) = VOIDmode
;
2657 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2659 /* Say where one reference is to the label, for the sake of the
2660 error if it is not defined. */
2661 DECL_SOURCE_LOCATION (decl
) = input_location
;
2663 /* Record the fact that this identifier is bound to this label. */
2664 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2666 /* Create the label htab for the function on demand. */
2668 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2669 named_label_entry_eq
, NULL
);
2671 /* Record this label on the list of labels used in this function.
2672 We do this before calling make_label_decl so that we get the
2673 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2674 ent
= ggc_alloc_cleared_named_label_entry ();
2675 ent
->label_decl
= decl
;
2677 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2678 gcc_assert (*slot
== NULL
);
2684 /* Look for a label named ID in the current function. If one cannot
2685 be found, create one. (We keep track of used, but undefined,
2686 labels, and complain about them at the end of a function.) */
2689 lookup_label_1 (tree id
)
2693 /* You can't use labels at global scope. */
2694 if (current_function_decl
== NULL_TREE
)
2696 error ("label %qE referenced outside of any function", id
);
2700 /* See if we've already got this label. */
2701 decl
= IDENTIFIER_LABEL_VALUE (id
);
2702 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2705 decl
= make_label_decl (id
, /*local_p=*/0);
2709 /* Wrapper for lookup_label_1. */
2712 lookup_label (tree id
)
2715 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2716 ret
= lookup_label_1 (id
);
2717 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2721 /* Declare a local label named ID. */
2724 declare_local_label (tree id
)
2727 cp_label_binding bind
;
2729 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2730 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2731 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2733 decl
= make_label_decl (id
, /*local_p=*/1);
2735 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2740 /* Returns nonzero if it is ill-formed to jump past the declaration of
2741 DECL. Returns 2 if it's also a real problem. */
2744 decl_jump_unsafe (tree decl
)
2746 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2747 with automatic storage duration is not in scope to a point where it is
2748 in scope is ill-formed unless the variable has scalar type, class type
2749 with a trivial default constructor and a trivial destructor, a
2750 cv-qualified version of one of these types, or an array of one of the
2751 preceding types and is declared without an initializer (8.5). */
2752 tree type
= TREE_TYPE (decl
);
2754 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2755 || type
== error_mark_node
)
2758 type
= strip_array_types (type
);
2760 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2763 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2769 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2772 identify_goto (tree decl
, const location_t
*locus
)
2775 permerror (input_location
, "jump to label %qD", decl
);
2777 permerror (input_location
, "jump to case label");
2779 permerror (*locus
, " from here");
2782 /* Check that a single previously seen jump to a newly defined label
2783 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2784 the jump context; NAMES are the names in scope in LEVEL at the jump
2785 context; LOCUS is the source position of the jump or 0. Returns
2786 true if all is well. */
2789 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2790 bool exited_omp
, const location_t
*locus
)
2792 cp_binding_level
*b
;
2793 bool identified
= false, saw_eh
= false, saw_omp
= false;
2797 identify_goto (decl
, locus
);
2798 error (" exits OpenMP structured block");
2799 identified
= saw_omp
= true;
2802 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2804 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2806 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2807 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2808 : TREE_CHAIN (new_decls
)))
2810 int problem
= decl_jump_unsafe (new_decls
);
2816 identify_goto (decl
, locus
);
2820 error (" crosses initialization of %q+#D", new_decls
);
2822 permerror (input_location
, " enters scope of %q+#D which has "
2823 "non-trivial destructor", new_decls
);
2828 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2832 identify_goto (decl
, locus
);
2835 if (b
->kind
== sk_try
)
2836 error (" enters try block");
2838 error (" enters catch block");
2841 if (b
->kind
== sk_omp
&& !saw_omp
)
2845 identify_goto (decl
, locus
);
2848 error (" enters OpenMP structured block");
2857 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2859 check_previous_goto_1 (decl
, use
->binding_level
,
2860 use
->names_in_scope
, use
->in_omp_scope
,
2861 &use
->o_goto_locus
);
2865 check_switch_goto (cp_binding_level
* level
)
2867 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2870 /* Check that a new jump to a label DECL is OK. Called by
2871 finish_goto_stmt. */
2874 check_goto (tree decl
)
2876 struct named_label_entry
*ent
, dummy
;
2877 bool saw_catch
= false, identified
= false;
2881 /* We can't know where a computed goto is jumping.
2882 So we assume that it's OK. */
2883 if (TREE_CODE (decl
) != LABEL_DECL
)
2886 /* We didn't record any information about this label when we created it,
2887 and there's not much point since it's trivial to analyze as a return. */
2888 if (decl
== cdtor_label
)
2891 dummy
.label_decl
= decl
;
2892 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2893 gcc_assert (ent
!= NULL
);
2895 /* If the label hasn't been defined yet, defer checking. */
2896 if (! DECL_INITIAL (decl
))
2898 struct named_label_use_entry
*new_use
;
2900 /* Don't bother creating another use if the last goto had the
2901 same data, and will therefore create the same set of errors. */
2903 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2906 new_use
= ggc_alloc_named_label_use_entry ();
2907 new_use
->binding_level
= current_binding_level
;
2908 new_use
->names_in_scope
= current_binding_level
->names
;
2909 new_use
->o_goto_locus
= input_location
;
2910 new_use
->in_omp_scope
= false;
2912 new_use
->next
= ent
->uses
;
2913 ent
->uses
= new_use
;
2917 if (ent
->in_try_scope
|| ent
->in_catch_scope
2918 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2920 permerror (input_location
, "jump to label %q+D", decl
);
2921 permerror (input_location
, " from here");
2925 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2927 int u
= decl_jump_unsafe (bad
);
2929 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2931 /* Can't skip init of __exception_info. */
2932 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2936 error (" skips initialization of %q+#D", bad
);
2938 permerror (input_location
, " enters scope of %q+#D which has "
2939 "non-trivial destructor", bad
);
2942 if (ent
->in_try_scope
)
2943 error (" enters try block");
2944 else if (ent
->in_catch_scope
&& !saw_catch
)
2945 error (" enters catch block");
2947 if (ent
->in_omp_scope
)
2948 error (" enters OpenMP structured block");
2949 else if (flag_openmp
)
2951 cp_binding_level
*b
;
2952 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2954 if (b
== ent
->binding_level
)
2956 if (b
->kind
== sk_omp
)
2960 permerror (input_location
, "jump to label %q+D", decl
);
2961 permerror (input_location
, " from here");
2964 error (" exits OpenMP structured block");
2971 /* Check that a return is ok wrt OpenMP structured blocks.
2972 Called by finish_return_stmt. Returns true if all is well. */
2975 check_omp_return (void)
2977 cp_binding_level
*b
;
2978 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2979 if (b
->kind
== sk_omp
)
2981 error ("invalid exit from OpenMP structured block");
2984 else if (b
->kind
== sk_function_parms
)
2989 /* Define a label, specifying the location in the source file.
2990 Return the LABEL_DECL node for the label. */
2993 define_label_1 (location_t location
, tree name
)
2995 struct named_label_entry
*ent
, dummy
;
2996 cp_binding_level
*p
;
2999 decl
= lookup_label (name
);
3001 dummy
.label_decl
= decl
;
3002 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
3003 gcc_assert (ent
!= NULL
);
3005 /* After labels, make any new cleanups in the function go into their
3006 own new (temporary) binding contour. */
3007 for (p
= current_binding_level
;
3008 p
->kind
!= sk_function_parms
;
3010 p
->more_cleanups_ok
= 0;
3012 if (name
== get_identifier ("wchar_t"))
3013 permerror (input_location
, "label named wchar_t");
3015 if (DECL_INITIAL (decl
) != NULL_TREE
)
3017 error ("duplicate label %qD", decl
);
3018 return error_mark_node
;
3022 struct named_label_use_entry
*use
;
3024 /* Mark label as having been defined. */
3025 DECL_INITIAL (decl
) = error_mark_node
;
3026 /* Say where in the source. */
3027 DECL_SOURCE_LOCATION (decl
) = location
;
3029 ent
->binding_level
= current_binding_level
;
3030 ent
->names_in_scope
= current_binding_level
->names
;
3032 for (use
= ent
->uses
; use
; use
= use
->next
)
3033 check_previous_goto (decl
, use
);
3040 /* Wrapper for define_label_1. */
3043 define_label (location_t location
, tree name
)
3046 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3047 ret
= define_label_1 (location
, name
);
3048 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3055 cp_binding_level
*level
;
3056 struct cp_switch
*next
;
3057 /* The SWITCH_STMT being built. */
3059 /* A splay-tree mapping the low element of a case range to the high
3060 element, or NULL_TREE if there is no high element. Used to
3061 determine whether or not a new case label duplicates an old case
3062 label. We need a tree, rather than simply a hash table, because
3063 of the GNU case range extension. */
3067 /* A stack of the currently active switch statements. The innermost
3068 switch statement is on the top of the stack. There is no need to
3069 mark the stack for garbage collection because it is only active
3070 during the processing of the body of a function, and we never
3071 collect at that point. */
3073 static struct cp_switch
*switch_stack
;
3075 /* Called right after a switch-statement condition is parsed.
3076 SWITCH_STMT is the switch statement being parsed. */
3079 push_switch (tree switch_stmt
)
3081 struct cp_switch
*p
= XNEW (struct cp_switch
);
3082 p
->level
= current_binding_level
;
3083 p
->next
= switch_stack
;
3084 p
->switch_stmt
= switch_stmt
;
3085 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3092 struct cp_switch
*cs
= switch_stack
;
3093 location_t switch_location
;
3095 /* Emit warnings as needed. */
3096 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3097 if (!processing_template_decl
)
3098 c_do_switch_warnings (cs
->cases
, switch_location
,
3099 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3100 SWITCH_STMT_COND (cs
->switch_stmt
));
3102 splay_tree_delete (cs
->cases
);
3103 switch_stack
= switch_stack
->next
;
3107 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3108 condition. Note that if TYPE and VALUE are already integral we don't
3109 really do the conversion because the language-independent
3110 warning/optimization code will work better that way. */
3113 case_conversion (tree type
, tree value
)
3115 if (value
== NULL_TREE
)
3118 if (cxx_dialect
>= cxx11
3119 && (SCOPED_ENUM_P (type
)
3120 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3122 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3123 type
= type_promotes_to (type
);
3124 value
= (perform_implicit_conversion_flags
3125 (type
, value
, tf_warning_or_error
,
3126 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3128 return cxx_constant_value (value
);
3131 /* Note that we've seen a definition of a case label, and complain if this
3132 is a bad place for one. */
3135 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3138 cp_binding_level
*p
;
3141 if (processing_template_decl
)
3145 /* For templates, just add the case label; we'll do semantic
3146 analysis at instantiation-time. */
3147 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3148 return add_stmt (build_case_label (low_value
, high_value
, label
));
3151 /* Find the condition on which this switch statement depends. */
3152 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3153 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3154 cond
= TREE_VALUE (cond
);
3156 if (!check_switch_goto (switch_stack
->level
))
3157 return error_mark_node
;
3159 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3161 low_value
= case_conversion (type
, low_value
);
3162 high_value
= case_conversion (type
, high_value
);
3164 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3165 low_value
, high_value
);
3167 /* After labels, make any new cleanups in the function go into their
3168 own new (temporary) binding contour. */
3169 for (p
= current_binding_level
;
3170 p
->kind
!= sk_function_parms
;
3172 p
->more_cleanups_ok
= 0;
3177 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3180 typename_hash (const void* k
)
3183 const_tree
const t
= (const_tree
) k
;
3185 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3186 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3191 typedef struct typename_info
{
3199 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3200 really of type `typename_info*' */
3203 typename_compare (const void * k1
, const void * k2
)
3205 const_tree
const t1
= (const_tree
) k1
;
3206 const typename_info
*const t2
= (const typename_info
*) k2
;
3208 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3209 && TYPE_CONTEXT (t1
) == t2
->scope
3210 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3211 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3212 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3215 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3216 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3218 Returns the new TYPENAME_TYPE. */
3220 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3223 build_typename_type (tree context
, tree name
, tree fullname
,
3224 enum tag_types tag_type
)
3232 if (typename_htab
== NULL
)
3233 typename_htab
= htab_create_ggc (61, &typename_hash
,
3234 &typename_compare
, NULL
);
3236 ti
.scope
= FROB_CONTEXT (context
);
3238 ti
.template_id
= fullname
;
3239 ti
.enum_p
= tag_type
== enum_type
;
3240 ti
.class_p
= (tag_type
== class_type
3241 || tag_type
== record_type
3242 || tag_type
== union_type
);
3243 hash
= (htab_hash_pointer (ti
.scope
)
3244 ^ htab_hash_pointer (ti
.name
));
3246 /* See if we already have this type. */
3247 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3252 /* Build the TYPENAME_TYPE. */
3253 t
= cxx_make_type (TYPENAME_TYPE
);
3254 TYPE_CONTEXT (t
) = ti
.scope
;
3255 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3256 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3257 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3259 /* Build the corresponding TYPE_DECL. */
3260 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3261 TYPE_NAME (TREE_TYPE (d
)) = d
;
3262 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3263 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3264 DECL_ARTIFICIAL (d
) = 1;
3266 /* Store it in the hash table. */
3269 /* TYPENAME_TYPEs must always be compared structurally, because
3270 they may or may not resolve down to another type depending on
3271 the currently open classes. */
3272 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3278 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3279 provided to name the type. Returns an appropriate type, unless an
3280 error occurs, in which case error_mark_node is returned. If we
3281 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3282 return that, rather than the _TYPE it corresponds to, in other
3283 cases we look through the type decl. If TF_ERROR is set, complain
3284 about errors, otherwise be quiet. */
3287 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3288 tsubst_flags_t complain
)
3294 if (name
== error_mark_node
3295 || context
== NULL_TREE
3296 || context
== error_mark_node
)
3297 return error_mark_node
;
3301 if (!(TYPE_LANG_SPECIFIC (name
)
3302 && (CLASSTYPE_IS_TEMPLATE (name
)
3303 || CLASSTYPE_USE_TEMPLATE (name
))))
3304 name
= TYPE_IDENTIFIER (name
);
3306 /* Create a TEMPLATE_ID_EXPR for the type. */
3307 name
= build_nt (TEMPLATE_ID_EXPR
,
3308 CLASSTYPE_TI_TEMPLATE (name
),
3309 CLASSTYPE_TI_ARGS (name
));
3311 else if (TREE_CODE (name
) == TYPE_DECL
)
3312 name
= DECL_NAME (name
);
3316 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3318 name
= TREE_OPERAND (name
, 0);
3319 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3320 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3321 else if (TREE_CODE (name
) == OVERLOAD
)
3323 if (complain
& tf_error
)
3324 error ("%qD is not a type", name
);
3325 return error_mark_node
;
3328 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3330 if (complain
& tf_error
)
3331 error ("%qD used without template parameters", name
);
3332 return error_mark_node
;
3334 gcc_assert (identifier_p (name
));
3335 gcc_assert (TYPE_P (context
));
3337 if (!MAYBE_CLASS_TYPE_P (context
))
3339 if (complain
& tf_error
)
3340 error ("%q#T is not a class", context
);
3341 return error_mark_node
;
3344 /* When the CONTEXT is a dependent type, NAME could refer to a
3345 dependent base class of CONTEXT. But look inside it anyway
3346 if CONTEXT is a currently open scope, in case it refers to a
3347 member of the current instantiation or a non-dependent base;
3348 lookup will stop when we hit a dependent base. */
3349 if (!dependent_scope_p (context
))
3350 /* We should only set WANT_TYPE when we're a nested typename type.
3351 Then we can give better diagnostics if we find a non-type. */
3352 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3356 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3357 return build_typename_type (context
, name
, fullname
, tag_type
);
3359 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3363 if (complain
& tf_error
)
3364 error (want_template
? G_("no class template named %q#T in %q#T")
3365 : G_("no type named %q#T in %q#T"), name
, context
);
3366 return error_mark_node
;
3369 /* Pull out the template from an injected-class-name (or multiple). */
3371 t
= maybe_get_template_decl_from_type_decl (t
);
3373 if (TREE_CODE (t
) == TREE_LIST
)
3375 if (complain
& tf_error
)
3377 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3378 print_candidates (t
);
3380 return error_mark_node
;
3383 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3385 if (complain
& tf_error
)
3386 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3388 return error_mark_node
;
3390 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3392 if (complain
& tf_error
)
3393 error ("%<typename %T::%D%> names %q#T, which is not a type",
3395 return error_mark_node
;
3398 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3399 return error_mark_node
;
3401 /* If we are currently parsing a template and if T is a typedef accessed
3402 through CONTEXT then we need to remember and check access of T at
3403 template instantiation time. */
3404 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3407 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3409 /*entering_scope=*/0,
3410 tf_warning_or_error
| tf_user
);
3412 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3415 maybe_record_typedef_use (t
);
3420 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3421 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3422 in which case error_mark_node is returned.
3424 If PARM_LIST is non-NULL, also make sure that the template parameter
3425 list of TEMPLATE_DECL matches.
3427 If COMPLAIN zero, don't complain about any errors that occur. */
3430 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3431 tsubst_flags_t complain
)
3437 name
= TYPE_IDENTIFIER (name
);
3438 else if (DECL_P (name
))
3439 name
= DECL_NAME (name
);
3440 gcc_assert (identifier_p (name
));
3442 if (!dependent_type_p (context
)
3443 || currently_open_class (context
))
3445 tree tmpl
= NULL_TREE
;
3447 if (MAYBE_CLASS_TYPE_P (context
))
3448 tmpl
= lookup_field (context
, name
, 0, false);
3450 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3451 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3453 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3455 if (complain
& tf_error
)
3456 error ("no class template named %q#T in %q#T", name
, context
);
3457 return error_mark_node
;
3461 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3463 if (complain
& tf_error
)
3465 error ("template parameters do not match template");
3466 error ("%q+D declared here", tmpl
);
3468 return error_mark_node
;
3471 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3473 return error_mark_node
;
3478 /* Build the UNBOUND_CLASS_TEMPLATE. */
3479 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3480 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3481 TREE_TYPE (t
) = NULL_TREE
;
3482 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3484 /* Build the corresponding TEMPLATE_DECL. */
3485 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3486 TYPE_NAME (TREE_TYPE (d
)) = d
;
3487 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3488 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3489 DECL_ARTIFICIAL (d
) = 1;
3490 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3497 /* Push the declarations of builtin types into the namespace.
3498 RID_INDEX is the index of the builtin type in the array
3499 RID_POINTERS. NAME is the name used when looking up the builtin
3500 type. TYPE is the _TYPE node for the builtin type. */
3503 record_builtin_type (enum rid rid_index
,
3507 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3508 tree tdecl
= NULL_TREE
;
3510 if ((int) rid_index
< (int) RID_MAX
)
3511 rname
= ridpointers
[(int) rid_index
];
3513 tname
= get_identifier (name
);
3515 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3516 eliminated. Built-in types should not be looked up name; their
3517 names are keywords that the parser can recognize. However, there
3518 is code in c-common.c that uses identifier_global_value to look
3519 up built-in types by name. */
3522 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3523 DECL_ARTIFICIAL (tdecl
) = 1;
3524 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3530 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3531 DECL_ARTIFICIAL (tdecl
) = 1;
3533 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3536 if (!TYPE_NAME (type
))
3537 TYPE_NAME (type
) = tdecl
;
3540 debug_hooks
->type_decl (tdecl
, 0);
3543 /* Record one of the standard Java types.
3544 * Declare it as having the given NAME.
3545 * If SIZE > 0, it is the size of one of the integral types;
3546 * otherwise it is the negative of the size of one of the other types. */
3549 record_builtin_java_type (const char* name
, int size
)
3554 type
= build_nonstandard_integer_type (size
, 0);
3555 type
= build_distinct_type_copy (type
);
3557 else if (size
> -32)
3560 /* "__java_char" or ""__java_boolean". */
3561 type
= build_nonstandard_integer_type (-size
, 1);
3562 type
= build_distinct_type_copy (type
);
3563 /* Get the signed type cached and attached to the unsigned type,
3564 so it doesn't get garbage-collected at "random" times,
3565 causing potential codegen differences out of different UIDs
3566 and different alias set numbers. */
3567 stype
= build_nonstandard_integer_type (-size
, 0);
3568 stype
= build_distinct_type_copy (stype
);
3569 TREE_CHAIN (type
) = stype
;
3570 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3573 { /* "__java_float" or ""__java_double". */
3574 type
= make_node (REAL_TYPE
);
3575 TYPE_PRECISION (type
) = - size
;
3578 record_builtin_type (RID_MAX
, name
, type
);
3579 decl
= TYPE_NAME (type
);
3581 /* Suppress generate debug symbol entries for these types,
3582 since for normal C++ they are just clutter.
3583 However, push_lang_context undoes this if extern "Java" is seen. */
3584 DECL_IGNORED_P (decl
) = 1;
3586 TYPE_FOR_JAVA (type
) = 1;
3590 /* Push a type into the namespace so that the back ends ignore it. */
3593 record_unknown_type (tree type
, const char* name
)
3595 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3596 TYPE_DECL
, get_identifier (name
), type
));
3597 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3598 DECL_IGNORED_P (decl
) = 1;
3599 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3600 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3601 TYPE_ALIGN (type
) = 1;
3602 TYPE_USER_ALIGN (type
) = 0;
3603 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3606 /* A string for which we should create an IDENTIFIER_NODE at
3609 typedef struct predefined_identifier
3611 /* The name of the identifier. */
3612 const char *const name
;
3613 /* The place where the IDENTIFIER_NODE should be stored. */
3615 /* Nonzero if this is the name of a constructor or destructor. */
3616 const int ctor_or_dtor_p
;
3617 } predefined_identifier
;
3619 /* Create all the predefined identifiers. */
3622 initialize_predefined_identifiers (void)
3624 const predefined_identifier
*pid
;
3626 /* A table of identifiers to create at startup. */
3627 static const predefined_identifier predefined_identifiers
[] = {
3628 { "C++", &lang_name_cplusplus
, 0 },
3629 { "C", &lang_name_c
, 0 },
3630 { "Java", &lang_name_java
, 0 },
3631 /* Some of these names have a trailing space so that it is
3632 impossible for them to conflict with names written by users. */
3633 { "__ct ", &ctor_identifier
, 1 },
3634 { "__base_ctor ", &base_ctor_identifier
, 1 },
3635 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3636 { "__dt ", &dtor_identifier
, 1 },
3637 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3638 { "__base_dtor ", &base_dtor_identifier
, 1 },
3639 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3640 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3641 { "nelts", &nelts_identifier
, 0 },
3642 { THIS_NAME
, &this_identifier
, 0 },
3643 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3644 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3645 { "_vptr", &vptr_identifier
, 0 },
3646 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3647 { "::", &global_scope_name
, 0 },
3648 { "std", &std_identifier
, 0 },
3652 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3654 *pid
->node
= get_identifier (pid
->name
);
3655 if (pid
->ctor_or_dtor_p
)
3656 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3660 /* Create the predefined scalar types of C,
3661 and some nodes representing standard constants (0, 1, (void *)0).
3662 Initialize the global binding level.
3663 Make definitions for built-in primitive functions. */
3666 cxx_init_decl_processing (void)
3669 tree void_ftype_ptr
;
3671 /* Create all the identifiers we need. */
3672 initialize_predefined_identifiers ();
3674 /* Create the global variables. */
3675 push_to_top_level ();
3677 current_function_decl
= NULL_TREE
;
3678 current_binding_level
= NULL
;
3679 /* Enter the global namespace. */
3680 gcc_assert (global_namespace
== NULL_TREE
);
3681 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3683 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3684 TREE_PUBLIC (global_namespace
) = 1;
3685 begin_scope (sk_namespace
, global_namespace
);
3687 if (flag_visibility_ms_compat
)
3688 default_visibility
= VISIBILITY_HIDDEN
;
3691 current_lang_name
= lang_name_c
;
3693 /* Create the `std' namespace. */
3694 push_namespace (std_identifier
);
3695 std_node
= current_namespace
;
3698 c_common_nodes_and_builtins ();
3700 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3701 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3702 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3703 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3704 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3705 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3706 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3707 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3709 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3711 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3712 truthvalue_type_node
= boolean_type_node
;
3713 truthvalue_false_node
= boolean_false_node
;
3714 truthvalue_true_node
= boolean_true_node
;
3716 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3717 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3718 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3721 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3724 delta_type_node
= ptrdiff_type_node
;
3725 vtable_index_type
= ptrdiff_type_node
;
3727 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3728 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3729 void_ftype_ptr
= build_function_type_list (void_type_node
,
3730 ptr_type_node
, NULL_TREE
);
3732 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3734 /* C++ extensions */
3736 unknown_type_node
= make_node (LANG_TYPE
);
3737 record_unknown_type (unknown_type_node
, "unknown type");
3739 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3740 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3742 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3744 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3745 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3747 init_list_type_node
= make_node (LANG_TYPE
);
3748 record_unknown_type (init_list_type_node
, "init list");
3751 /* Make sure we get a unique function type, so we can give
3752 its pointer type a name. (This wins for gdb.) */
3753 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3754 TREE_TYPE (vfunc_type
) = integer_type_node
;
3755 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3756 layout_type (vfunc_type
);
3758 vtable_entry_type
= build_pointer_type (vfunc_type
);
3760 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3763 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3764 layout_type (vtbl_type_node
);
3765 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3766 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3767 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3768 layout_type (vtbl_ptr_type_node
);
3769 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3771 push_namespace (get_identifier ("__cxxabiv1"));
3772 abi_node
= current_namespace
;
3775 global_type_node
= make_node (LANG_TYPE
);
3776 record_unknown_type (global_type_node
, "global type");
3779 current_lang_name
= lang_name_cplusplus
;
3782 tree newattrs
, extvisattr
;
3783 tree newtype
, deltype
;
3784 tree ptr_ftype_sizetype
;
3788 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3789 if (cxx_dialect
== cxx98
)
3792 tree bad_alloc_type_node
;
3793 tree bad_alloc_decl
;
3795 push_namespace (std_identifier
);
3796 bad_alloc_id
= get_identifier ("bad_alloc");
3797 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3798 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3800 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3801 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3805 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3808 new_eh_spec
= noexcept_false_spec
;
3810 /* Ensure attribs.c is initialized. */
3812 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3814 newattrs
= tree_cons (get_identifier ("alloc_size"),
3815 build_tree_list (NULL_TREE
, integer_one_node
),
3817 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3818 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3819 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3820 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3821 DECL_IS_OPERATOR_NEW (push_cp_library_fn (NEW_EXPR
, newtype
, 0)) = 1;
3822 DECL_IS_OPERATOR_NEW (push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0)) = 1;
3823 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3824 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3826 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3827 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3828 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3829 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3830 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3831 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3832 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3833 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3837 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3838 ECF_NORETURN
| ECF_NOTHROW
);
3840 /* Perform other language dependent initializations. */
3841 init_class_processing ();
3842 init_rtti_processing ();
3843 init_template_processing ();
3845 if (flag_exceptions
)
3846 init_exception_processing ();
3848 if (! supports_one_only ())
3851 make_fname_decl
= cp_make_fname_decl
;
3852 start_fname_decls ();
3854 /* Show we use EH for cleanups. */
3855 if (flag_exceptions
)
3856 using_eh_for_cleanups ();
3859 /* Generate an initializer for a function naming variable from
3860 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3861 filled in with the type of the init. */
3864 cp_fname_init (const char* name
, tree
*type_p
)
3866 tree domain
= NULL_TREE
;
3868 tree init
= NULL_TREE
;
3873 length
= strlen (name
);
3874 domain
= build_index_type (size_int (length
));
3875 init
= build_string (length
+ 1, name
);
3878 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3879 type
= build_cplus_array_type (type
, domain
);
3884 TREE_TYPE (init
) = type
;
3886 init
= error_mark_node
;
3891 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3892 the decl, LOC is the location to give the decl, NAME is the
3893 initialization string and TYPE_DEP indicates whether NAME depended
3894 on the type of the function. We make use of that to detect
3895 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3896 at the point of first use, so we mustn't push the decl now. */
3899 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3901 const char *const name
= (type_dep
&& processing_template_decl
3902 ? NULL
: fname_as_string (type_dep
));
3904 tree init
= cp_fname_init (name
, &type
);
3905 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3908 free (CONST_CAST (char *, name
));
3910 /* As we're using pushdecl_with_scope, we must set the context. */
3911 DECL_CONTEXT (decl
) = current_function_decl
;
3913 TREE_STATIC (decl
) = 1;
3914 TREE_READONLY (decl
) = 1;
3915 DECL_ARTIFICIAL (decl
) = 1;
3917 TREE_USED (decl
) = 1;
3919 if (current_function_decl
)
3921 cp_binding_level
*b
= current_binding_level
;
3922 if (b
->kind
== sk_function_parms
)
3923 return error_mark_node
;
3924 while (b
->level_chain
->kind
!= sk_function_parms
)
3926 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3927 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3928 LOOKUP_ONLYCONVERTING
);
3932 DECL_THIS_STATIC (decl
) = true;
3933 pushdecl_top_level_and_finish (decl
, init
);
3940 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3942 tree id
= DECL_NAME (decl
);
3943 const char *name
= IDENTIFIER_POINTER (id
);
3945 retrofit_lang_decl (decl
);
3947 DECL_ARTIFICIAL (decl
) = 1;
3948 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3949 SET_DECL_LANGUAGE (decl
, lang_c
);
3950 /* Runtime library routines are, by definition, available in an
3951 external shared object. */
3952 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3953 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3955 DECL_CONTEXT (decl
) = context
;
3958 pushdecl_top_level (decl
);
3962 /* A function in the user's namespace should have an explicit
3963 declaration before it is used. Mark the built-in function as
3964 anticipated but not actually declared. */
3965 if (name
[0] != '_' || name
[1] != '_')
3966 DECL_ANTICIPATED (decl
) = 1;
3967 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3969 size_t len
= strlen (name
);
3971 /* Treat __*_chk fortification functions as anticipated as well,
3972 unless they are __builtin_*. */
3973 if (len
> strlen ("___chk")
3974 && memcmp (name
+ len
- strlen ("_chk"),
3975 "_chk", strlen ("_chk") + 1) == 0)
3976 DECL_ANTICIPATED (decl
) = 1;
3983 cxx_builtin_function (tree decl
)
3985 tree id
= DECL_NAME (decl
);
3986 const char *name
= IDENTIFIER_POINTER (id
);
3987 /* All builtins that don't begin with an '_' should additionally
3988 go in the 'std' namespace. */
3991 tree decl2
= copy_node(decl
);
3992 push_namespace (std_identifier
);
3993 builtin_function_1 (decl2
, std_node
, false);
3997 return builtin_function_1 (decl
, NULL_TREE
, false);
4000 /* Like cxx_builtin_function, but guarantee the function is added to the global
4001 scope. This is to allow function specific options to add new machine
4002 dependent builtins when the target ISA changes via attribute((target(...)))
4003 which saves space on program startup if the program does not use non-generic
4007 cxx_builtin_function_ext_scope (tree decl
)
4010 tree id
= DECL_NAME (decl
);
4011 const char *name
= IDENTIFIER_POINTER (id
);
4012 /* All builtins that don't begin with an '_' should additionally
4013 go in the 'std' namespace. */
4016 tree decl2
= copy_node(decl
);
4017 push_namespace (std_identifier
);
4018 builtin_function_1 (decl2
, std_node
, true);
4022 return builtin_function_1 (decl
, NULL_TREE
, true);
4025 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4026 function. Not called directly. */
4029 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4032 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4033 DECL_EXTERNAL (fn
) = 1;
4034 TREE_PUBLIC (fn
) = 1;
4035 DECL_ARTIFICIAL (fn
) = 1;
4036 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4037 SET_DECL_LANGUAGE (fn
, lang_c
);
4038 /* Runtime library routines are, by definition, available in an
4039 external shared object. */
4040 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4041 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4042 set_call_expr_flags (fn
, ecf_flags
);
4046 /* Returns the _DECL for a library function with C++ linkage. */
4049 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4052 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4053 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4054 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4058 /* Like build_library_fn, but takes a C string instead of an
4062 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4064 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4067 /* Like build_cp_library_fn, but takes a C string instead of an
4071 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4073 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4077 /* Like build_library_fn, but also pushes the function so that we will
4078 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4079 may throw exceptions listed in RAISES. */
4082 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4087 type
= build_exception_variant (type
, raises
);
4089 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4090 pushdecl_top_level (fn
);
4094 /* Like build_cp_library_fn, but also pushes the function so that it
4095 will be found by normal lookup. */
4098 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4101 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4106 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4110 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4114 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4116 tree type
= build_function_type (void_type_node
, parmtypes
);
4117 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4120 /* Like push_library_fn, but also note that this function throws
4121 and does not return. Used for __throw_foo and the like. */
4124 push_throw_library_fn (tree name
, tree type
)
4126 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4130 /* When we call finish_struct for an anonymous union, we create
4131 default copy constructors and such. But, an anonymous union
4132 shouldn't have such things; this function undoes the damage to the
4133 anonymous union type T.
4135 (The reason that we create the synthesized methods is that we don't
4136 distinguish `union { int i; }' from `typedef union { int i; } U'.
4137 The first is an anonymous union; the second is just an ordinary
4141 fixup_anonymous_aggr (tree t
)
4145 /* Wipe out memory of synthesized methods. */
4146 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4147 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4148 TYPE_HAS_COPY_CTOR (t
) = 0;
4149 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4150 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4151 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4153 /* Splice the implicitly generated functions out of the TYPE_METHODS
4155 q
= &TYPE_METHODS (t
);
4158 if (DECL_ARTIFICIAL (*q
))
4159 *q
= TREE_CHAIN (*q
);
4161 q
= &DECL_CHAIN (*q
);
4164 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4165 if (TYPE_METHODS (t
))
4167 tree decl
= TYPE_MAIN_DECL (t
);
4169 if (TREE_CODE (t
) != UNION_TYPE
)
4170 error_at (DECL_SOURCE_LOCATION (decl
),
4171 "an anonymous struct cannot have function members");
4173 error_at (DECL_SOURCE_LOCATION (decl
),
4174 "an anonymous union cannot have function members");
4177 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4178 assignment operators (because they cannot have these methods themselves).
4179 For anonymous unions this is already checked because they are not allowed
4180 in any union, otherwise we have to check it. */
4181 if (TREE_CODE (t
) != UNION_TYPE
)
4185 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4186 if (TREE_CODE (field
) == FIELD_DECL
)
4188 type
= TREE_TYPE (field
);
4189 if (CLASS_TYPE_P (type
))
4191 if (TYPE_NEEDS_CONSTRUCTING (type
))
4192 error ("member %q+#D with constructor not allowed "
4193 "in anonymous aggregate", field
);
4194 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4195 error ("member %q+#D with destructor not allowed "
4196 "in anonymous aggregate", field
);
4197 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4198 error ("member %q+#D with copy assignment operator "
4199 "not allowed in anonymous aggregate", field
);
4205 /* Warn for an attribute located at LOCATION that appertains to the
4206 class type CLASS_TYPE that has not been properly placed after its
4207 class-key, in it class-specifier. */
4210 warn_misplaced_attr_for_class_type (source_location location
,
4213 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4215 warning_at (location
, OPT_Wattributes
,
4216 "attribute ignored in declaration "
4217 "of %q#T", class_type
);
4219 "attribute for %q#T must follow the %qs keyword",
4220 class_type
, class_key_or_enum_as_string (class_type
));
4223 /* Make sure that a declaration with no declarator is well-formed, i.e.
4224 just declares a tagged type or anonymous union.
4226 Returns the type declared; or NULL_TREE if none. */
4229 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4230 bool explicit_type_instantiation_p
)
4232 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4233 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4234 /* If a class, struct, or enum type is declared by the DECLSPECS
4235 (i.e, if a class-specifier, enum-specifier, or non-typename
4236 elaborated-type-specifier appears in the DECLSPECS),
4237 DECLARED_TYPE is set to the corresponding type. */
4238 tree declared_type
= NULL_TREE
;
4239 bool error_p
= false;
4241 if (declspecs
->multiple_types_p
)
4242 error ("multiple types in one declaration");
4243 else if (declspecs
->redefined_builtin_type
)
4245 if (!in_system_header
)
4246 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4247 "redeclaration of C++ built-in type %qT",
4248 declspecs
->redefined_builtin_type
);
4253 && TYPE_P (declspecs
->type
)
4254 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4255 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4256 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4257 declared_type
= declspecs
->type
;
4258 else if (declspecs
->type
== error_mark_node
)
4260 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4261 permerror (input_location
, "declaration does not declare anything");
4262 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4264 error ("%<auto%> can only be specified for variables "
4265 "or function declarations");
4266 return error_mark_node
;
4268 /* Check for an anonymous union. */
4269 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4270 && TYPE_ANONYMOUS_P (declared_type
))
4272 /* 7/3 In a simple-declaration, the optional init-declarator-list
4273 can be omitted only when declaring a class (clause 9) or
4274 enumeration (7.2), that is, when the decl-specifier-seq contains
4275 either a class-specifier, an elaborated-type-specifier with
4276 a class-key (9.1), or an enum-specifier. In these cases and
4277 whenever a class-specifier or enum-specifier is present in the
4278 decl-specifier-seq, the identifiers in these specifiers are among
4279 the names being declared by the declaration (as class-name,
4280 enum-names, or enumerators, depending on the syntax). In such
4281 cases, and except for the declaration of an unnamed bit-field (9.6),
4282 the decl-specifier-seq shall introduce one or more names into the
4283 program, or shall redeclare a name introduced by a previous
4284 declaration. [Example:
4285 enum { }; // ill-formed
4286 typedef class { }; // ill-formed
4290 error ("missing type-name in typedef-declaration");
4293 /* Anonymous unions are objects, so they can have specifiers. */;
4294 SET_ANON_AGGR_TYPE_P (declared_type
);
4296 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4297 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4302 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4303 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4304 error ("%qs can only be specified for functions",
4305 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4306 ? "inline" : "virtual");
4308 && (!current_class_type
4309 || current_scope () != current_class_type
))
4310 error ("%<friend%> can only be specified inside a class");
4311 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4312 error ("%<explicit%> can only be specified for constructors");
4313 else if (declspecs
->storage_class
)
4314 error ("a storage class can only be specified for objects "
4316 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4317 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4318 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4319 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4320 error ("qualifiers can only be specified for objects "
4322 else if (saw_typedef
)
4323 warning (0, "%<typedef%> was ignored in this declaration");
4324 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4325 error ("%<constexpr%> cannot be used for type declarations");
4328 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4331 if (!CLASS_TYPE_P (declared_type
)
4332 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4333 /* For a non-template class, use the name location. */
4334 loc
= location_of (declared_type
);
4336 /* For a template class (an explicit instantiation), use the
4337 current location. */
4338 loc
= input_location
;
4340 if (explicit_type_instantiation_p
)
4341 /* [dcl.attr.grammar]/4:
4343 No attribute-specifier-seq shall appertain to an explicit
4346 warning_at (loc
, OPT_Wattributes
,
4347 "attribute ignored in explicit instantiation %q#T",
4350 "no attribute can be applied to "
4351 "an explicit instantiation");
4354 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4357 return declared_type
;
4360 /* Called when a declaration is seen that contains no names to declare.
4361 If its type is a reference to a structure, union or enum inherited
4362 from a containing scope, shadow that tag name for the current scope
4363 with a forward reference.
4364 If its type defines a new named structure or union
4365 or defines an enum, it is valid but we need not do anything here.
4366 Otherwise, it is an error.
4368 C++: may have to grok the declspecs to learn about static,
4369 complain for anonymous unions.
4371 Returns the TYPE declared -- or NULL_TREE if none. */
4374 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4376 tree t
= check_tag_decl (declspecs
,
4377 /*explicit_type_instantiation_p=*/false);
4382 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4385 /* This is where the variables in an anonymous union are
4386 declared. An anonymous union declaration looks like:
4388 because there is no declarator after the union, the parser
4389 sends that declaration here. */
4390 if (ANON_AGGR_TYPE_P (t
))
4392 fixup_anonymous_aggr (t
);
4394 if (TYPE_FIELDS (t
))
4396 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4397 declspecs
, NORMAL
, 0, NULL
);
4398 finish_anon_union (decl
);
4405 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4408 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4409 const cp_declarator
*declarator
,
4410 bool is_template_arg
)
4414 enum decl_context context
4415 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4416 attrs
= type_specifiers
->attributes
;
4417 type_specifiers
->attributes
= NULL_TREE
;
4418 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4419 if (attrs
&& type
!= error_mark_node
)
4421 if (CLASS_TYPE_P (type
))
4422 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4423 "outside of definition", type
);
4424 else if (MAYBE_CLASS_TYPE_P (type
))
4425 /* A template type parameter or other dependent type. */
4426 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4427 "type %qT without an associated declaration", type
);
4429 cplus_decl_attributes (&type
, attrs
, 0);
4434 /* Process a DECLARATOR for a function-scope variable declaration,
4435 namespace-scope variable declaration, or function declaration.
4436 (Function definitions go through start_function; class member
4437 declarations appearing in the body of the class go through
4438 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4439 If an error occurs, the error_mark_node is returned instead.
4441 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4442 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4443 for an explicitly defaulted function, or SD_DELETED for an explicitly
4444 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4445 implicitly initialized via a default constructor. ATTRIBUTES and
4446 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4448 The scope represented by the context of the returned DECL is pushed
4449 (if it is not the global namespace) and is assigned to
4450 *PUSHED_SCOPE_P. The caller is then responsible for calling
4451 pop_scope on *PUSHED_SCOPE_P if it is set. */
4454 start_decl (const cp_declarator
*declarator
,
4455 cp_decl_specifier_seq
*declspecs
,
4458 tree prefix_attributes
,
4459 tree
*pushed_scope_p
)
4467 *pushed_scope_p
= NULL_TREE
;
4469 /* An object declared as __attribute__((deprecated)) suppresses
4470 warnings of uses of other deprecated items. */
4471 if (lookup_attribute ("deprecated", attributes
))
4472 deprecated_state
= DEPRECATED_SUPPRESS
;
4474 attributes
= chainon (attributes
, prefix_attributes
);
4476 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4479 deprecated_state
= DEPRECATED_NORMAL
;
4481 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4482 || decl
== error_mark_node
)
4483 return error_mark_node
;
4485 context
= CP_DECL_CONTEXT (decl
);
4486 if (context
!= global_namespace
)
4487 *pushed_scope_p
= push_scope (context
);
4490 /* Is it valid for this decl to have an initializer at all?
4491 If not, set INITIALIZED to zero, which will indirectly
4492 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4493 switch (TREE_CODE (decl
))
4496 error ("typedef %qD is initialized (use decltype instead)", decl
);
4497 return error_mark_node
;
4500 if (initialized
== SD_DELETED
)
4501 /* We'll handle the rest of the semantics later, but we need to
4502 set this now so it's visible to duplicate_decls. */
4503 DECL_DELETED_FN (decl
) = 1;
4512 if (! toplevel_bindings_p ()
4513 && DECL_EXTERNAL (decl
))
4514 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4516 DECL_EXTERNAL (decl
) = 0;
4517 if (toplevel_bindings_p ())
4518 TREE_STATIC (decl
) = 1;
4520 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4522 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4523 record_key_method_defined (decl
);
4525 /* If this is a typedef that names the class for linkage purposes
4526 (7.1.3p8), apply any attributes directly to the type. */
4527 if (TREE_CODE (decl
) == TYPE_DECL
4528 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4529 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4530 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4534 /* Set attributes here so if duplicate decl, will have proper attributes. */
4535 cplus_decl_attributes (&decl
, attributes
, flags
);
4537 /* Dllimported symbols cannot be defined. Static data members (which
4538 can be initialized in-class and dllimported) go through grokfield,
4539 not here, so we don't need to exclude those decls when checking for
4541 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4543 error ("definition of %q#D is marked %<dllimport%>", decl
);
4544 DECL_DLLIMPORT_P (decl
) = 0;
4547 /* If #pragma weak was used, mark the decl weak now. */
4548 if (!processing_template_decl
)
4549 maybe_apply_pragma_weak (decl
);
4551 if (TREE_CODE (decl
) == FUNCTION_DECL
4552 && DECL_DECLARED_INLINE_P (decl
)
4553 && DECL_UNINLINABLE (decl
)
4554 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4555 warning (0, "inline function %q+D given attribute noinline", decl
);
4557 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4561 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4562 if (field
== NULL_TREE
|| !VAR_P (field
))
4563 error ("%q#D is not a static member of %q#T", decl
, context
);
4566 if (DECL_CONTEXT (field
) != context
)
4568 if (!same_type_p (DECL_CONTEXT (field
), context
))
4569 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4570 "to be defined as %<%T::%D%>",
4571 DECL_CONTEXT (field
), DECL_NAME (decl
),
4572 context
, DECL_NAME (decl
));
4573 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4575 /* Static data member are tricky; an in-class initialization
4576 still doesn't provide a definition, so the in-class
4577 declaration will have DECL_EXTERNAL set, but will have an
4578 initialization. Thus, duplicate_decls won't warn
4579 about this situation, and so we check here. */
4580 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4581 error ("duplicate initialization of %qD", decl
);
4582 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4584 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4585 && !DECL_DECLARED_CONSTEXPR_P (field
))
4586 error ("%qD declared %<constexpr%> outside its class", field
);
4591 tree field
= check_classfn (context
, decl
,
4592 (processing_template_decl
4593 > template_class_depth (context
))
4594 ? current_template_parms
4596 if (field
&& field
!= error_mark_node
4597 && duplicate_decls (decl
, field
,
4598 /*newdecl_is_friend=*/false))
4602 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4603 DECL_IN_AGGR_P (decl
) = 0;
4604 /* Do not mark DECL as an explicit specialization if it was not
4605 already marked as an instantiation; a declaration should
4606 never be marked as a specialization unless we know what
4607 template is being specialized. */
4608 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4610 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4612 /* [temp.expl.spec] An explicit specialization of a static data
4613 member of a template is a definition if the declaration
4614 includes an initializer; otherwise, it is a declaration.
4616 We check for processing_specialization so this only applies
4617 to the new specialization syntax. */
4618 if (!initialized
&& processing_specialization
)
4619 DECL_EXTERNAL (decl
) = 1;
4622 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4623 /* Aliases are definitions. */
4625 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4629 was_public
= TREE_PUBLIC (decl
);
4631 /* Enter this declaration into the symbol table. */
4632 decl
= maybe_push_decl (decl
);
4634 if (processing_template_decl
)
4635 decl
= push_template_decl (decl
);
4636 if (decl
== error_mark_node
)
4637 return error_mark_node
;
4640 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4641 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4643 /* This is a const variable with implicit 'static'. Set
4644 DECL_THIS_STATIC so we can tell it from variables that are
4645 !TREE_PUBLIC because of the anonymous namespace. */
4646 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4647 DECL_THIS_STATIC (decl
) = 1;
4650 if (!processing_template_decl
&& VAR_P (decl
))
4651 start_decl_1 (decl
, initialized
);
4656 /* Process the declaration of a variable DECL. INITIALIZED is true
4657 iff DECL is explicitly initialized. (INITIALIZED is false if the
4658 variable is initialized via an implicitly-called constructor.)
4659 This function must be called for ordinary variables (including, for
4660 example, implicit instantiations of templates), but must not be
4661 called for template declarations. */
4664 start_decl_1 (tree decl
, bool initialized
)
4668 bool aggregate_definition_p
;
4670 gcc_assert (!processing_template_decl
);
4672 if (error_operand_p (decl
))
4675 gcc_assert (VAR_P (decl
));
4677 type
= TREE_TYPE (decl
);
4678 complete_p
= COMPLETE_TYPE_P (type
);
4679 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4681 /* If an explicit initializer is present, or if this is a definition
4682 of an aggregate, then we need a complete type at this point.
4683 (Scalars are always complete types, so there is nothing to
4684 check.) This code just sets COMPLETE_P; errors (if necessary)
4685 are issued below. */
4686 if ((initialized
|| aggregate_definition_p
)
4688 && COMPLETE_TYPE_P (complete_type (type
)))
4691 /* We will not yet have set TREE_READONLY on DECL if the type
4692 was "const", but incomplete, before this point. But, now, we
4693 have a complete type, so we can try again. */
4694 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4698 /* Is it valid for this decl to have an initializer at all? */
4700 /* Don't allow initializations for incomplete types except for
4701 arrays which might be completed by the initialization. */
4703 ; /* A complete type is ok. */
4704 else if (type_uses_auto (type
))
4705 ; /* An auto type is ok. */
4706 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4708 error ("variable %q#D has initializer but incomplete type", decl
);
4709 type
= TREE_TYPE (decl
) = error_mark_node
;
4711 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4713 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4714 error ("elements of array %q#D have incomplete type", decl
);
4715 /* else we already gave an error in start_decl. */
4718 else if (aggregate_definition_p
&& !complete_p
)
4720 if (type_uses_auto (type
))
4721 error ("declaration of %q#D has no initializer", decl
);
4723 error ("aggregate %q#D has incomplete type and cannot be defined",
4725 /* Change the type so that assemble_variable will give
4726 DECL an rtl we can live with: (mem (const_int 0)). */
4727 type
= TREE_TYPE (decl
) = error_mark_node
;
4730 /* Create a new scope to hold this declaration if necessary.
4731 Whether or not a new scope is necessary cannot be determined
4732 until after the type has been completed; if the type is a
4733 specialization of a class template it is not until after
4734 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4735 will be set correctly. */
4736 maybe_push_cleanup_level (type
);
4739 /* Handle initialization of references. DECL, TYPE, and INIT have the
4740 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4741 but will be set to a new CLEANUP_STMT if a temporary is created
4742 that must be destroyed subsequently.
4744 Returns an initializer expression to use to initialize DECL, or
4745 NULL if the initialization can be performed statically.
4747 Quotes on semantics can be found in ARM 8.4.3. */
4750 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4752 if (init
== NULL_TREE
)
4754 if ((DECL_LANG_SPECIFIC (decl
) == 0
4755 || DECL_IN_AGGR_P (decl
) == 0)
4756 && ! DECL_THIS_EXTERN (decl
))
4757 error ("%qD declared as reference but not initialized", decl
);
4761 if (TREE_CODE (init
) == TREE_LIST
)
4762 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4763 tf_warning_or_error
);
4765 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4766 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4767 /* Note: default conversion is only called in very special cases. */
4768 init
= decay_conversion (init
, tf_warning_or_error
);
4770 /* Convert INIT to the reference type TYPE. This may involve the
4771 creation of a temporary, whose lifetime must be the same as that
4772 of the reference. If so, a DECL_EXPR for the temporary will be
4773 added just after the DECL_EXPR for DECL. That's why we don't set
4774 DECL_INITIAL for local references (instead assigning to them
4775 explicitly); we need to allow the temporary to be initialized
4777 return initialize_reference (type
, init
, flags
,
4778 tf_warning_or_error
);
4781 /* Designated initializers in arrays are not supported in GNU C++.
4782 The parser cannot detect this error since it does not know whether
4783 a given brace-enclosed initializer is for a class type or for an
4784 array. This function checks that CE does not use a designated
4785 initializer. If it does, an error is issued. Returns true if CE
4786 is valid, i.e., does not have a designated initializer. */
4789 check_array_designated_initializer (constructor_elt
*ce
,
4790 unsigned HOST_WIDE_INT index
)
4792 /* Designated initializers for array elements are not supported. */
4795 /* The parser only allows identifiers as designated
4797 if (ce
->index
== error_mark_node
)
4799 error ("name used in a GNU-style designated "
4800 "initializer for an array");
4803 else if (identifier_p (ce
->index
))
4805 error ("name %qD used in a GNU-style designated "
4806 "initializer for an array", ce
->index
);
4810 ce
->index
= cxx_constant_value (ce
->index
);
4812 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4814 /* A C99 designator is OK if it matches the current index. */
4815 if (wi::eq_p (ce
->index
, index
))
4818 sorry ("non-trivial designated initializers not supported");
4829 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4830 array until we finish parsing the initializer. If that's the
4831 situation we're in, update DECL accordingly. */
4834 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4836 tree type
= TREE_TYPE (decl
);
4838 if (TREE_CODE (type
) == ARRAY_TYPE
4839 && TYPE_DOMAIN (type
) == NULL_TREE
4840 && TREE_CODE (decl
) != TYPE_DECL
)
4842 /* do_default is really a C-ism to deal with tentative definitions.
4843 But let's leave it here to ease the eventual merge. */
4844 int do_default
= !DECL_EXTERNAL (decl
);
4845 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4848 /* Check that there are no designated initializers in INIT, as
4849 those are not supported in GNU C++, and as the middle-end
4850 will crash if presented with a non-numeric designated
4852 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4854 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4855 constructor_elt
*ce
;
4857 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4858 if (!check_array_designated_initializer (ce
, i
))
4864 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4868 error ("initializer fails to determine size of %qD", decl
);
4870 else if (failure
== 2)
4874 error ("array size missing in %qD", decl
);
4876 /* If a `static' var's size isn't known, make it extern as
4877 well as static, so it does not get allocated. If it's not
4878 `static', then don't mark it extern; finish_incomplete_decl
4879 will give it a default size and it will get allocated. */
4880 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4881 DECL_EXTERNAL (decl
) = 1;
4883 else if (failure
== 3)
4885 error ("zero-size array %qD", decl
);
4889 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4891 relayout_decl (decl
);
4895 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4896 any appropriate error messages regarding the layout. */
4899 layout_var_decl (tree decl
)
4903 type
= TREE_TYPE (decl
);
4904 if (type
== error_mark_node
)
4907 /* If we haven't already laid out this declaration, do so now.
4908 Note that we must not call complete type for an external object
4909 because it's type might involve templates that we are not
4910 supposed to instantiate yet. (And it's perfectly valid to say
4911 `extern X x' for some incomplete type `X'.) */
4912 if (!DECL_EXTERNAL (decl
))
4913 complete_type (type
);
4914 if (!DECL_SIZE (decl
)
4915 && TREE_TYPE (decl
) != error_mark_node
4916 && (COMPLETE_TYPE_P (type
)
4917 || (TREE_CODE (type
) == ARRAY_TYPE
4918 && !TYPE_DOMAIN (type
)
4919 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4920 layout_decl (decl
, 0);
4922 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4924 /* An automatic variable with an incomplete type: that is an error.
4925 Don't talk about array types here, since we took care of that
4926 message in grokdeclarator. */
4927 error ("storage size of %qD isn%'t known", decl
);
4928 TREE_TYPE (decl
) = error_mark_node
;
4931 /* Keep this code around in case we later want to control debug info
4932 based on whether a type is "used". (jason 1999-11-11) */
4934 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4935 /* Let debugger know it should output info for this type. */
4936 note_debug_info_needed (ttype
);
4938 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4939 note_debug_info_needed (DECL_CONTEXT (decl
));
4942 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4943 && DECL_SIZE (decl
) != NULL_TREE
4944 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4946 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4947 constant_expression_warning (DECL_SIZE (decl
));
4950 error ("storage size of %qD isn%'t constant", decl
);
4951 TREE_TYPE (decl
) = error_mark_node
;
4956 /* If a local static variable is declared in an inline function, or if
4957 we have a weak definition, we must endeavor to create only one
4958 instance of the variable at link-time. */
4961 maybe_commonize_var (tree decl
)
4963 /* Static data in a function with comdat linkage also has comdat
4965 if (TREE_STATIC (decl
)
4966 /* Don't mess with __FUNCTION__. */
4967 && ! DECL_ARTIFICIAL (decl
)
4968 && DECL_FUNCTION_SCOPE_P (decl
)
4969 && vague_linkage_p (DECL_CONTEXT (decl
)))
4973 /* With weak symbols, we simply make the variable COMDAT;
4974 that will cause copies in multiple translations units to
4976 comdat_linkage (decl
);
4980 if (DECL_INITIAL (decl
) == NULL_TREE
4981 || DECL_INITIAL (decl
) == error_mark_node
)
4983 /* Without weak symbols, we can use COMMON to merge
4984 uninitialized variables. */
4985 TREE_PUBLIC (decl
) = 1;
4986 DECL_COMMON (decl
) = 1;
4990 /* While for initialized variables, we must use internal
4991 linkage -- which means that multiple copies will not
4993 TREE_PUBLIC (decl
) = 0;
4994 DECL_COMMON (decl
) = 0;
4995 warning_at (input_location
, 0,
4996 "sorry: semantics of inline function static "
4997 "data %q+#D are wrong (you%'ll wind up "
4998 "with multiple copies)", decl
);
4999 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5000 " you can work around this by removing "
5005 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
5006 /* Set it up again; we might have set DECL_INITIAL since the last
5008 comdat_linkage (decl
);
5011 /* Issue an error message if DECL is an uninitialized const variable. */
5014 check_for_uninitialized_const_var (tree decl
)
5016 tree type
= strip_array_types (TREE_TYPE (decl
));
5018 /* ``Unless explicitly declared extern, a const object does not have
5019 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5022 && TREE_CODE (type
) != REFERENCE_TYPE
5023 && CP_TYPE_CONST_P (type
)
5024 && !DECL_INITIAL (decl
))
5026 tree field
= default_init_uninitialized_part (type
);
5030 permerror (DECL_SOURCE_LOCATION (decl
),
5031 "uninitialized const %qD", decl
);
5033 if (CLASS_TYPE_P (type
))
5035 tree defaulted_ctor
;
5037 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5038 "%q#T has no user-provided default constructor", type
);
5039 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5041 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5042 "constructor is not user-provided because it is "
5043 "explicitly defaulted in the class body");
5044 inform (0, "and the implicitly-defined constructor does not "
5045 "initialize %q+#D", field
);
5050 /* Structure holding the current initializer being processed by reshape_init.
5051 CUR is a pointer to the current element being processed, END is a pointer
5052 after the last element present in the initializer. */
5053 typedef struct reshape_iterator_t
5055 constructor_elt
*cur
;
5056 constructor_elt
*end
;
5059 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5061 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5062 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5063 initialized. If there are no more such fields, the return value
5067 next_initializable_field (tree field
)
5070 && (TREE_CODE (field
) != FIELD_DECL
5071 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5072 || DECL_ARTIFICIAL (field
)))
5073 field
= DECL_CHAIN (field
);
5078 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5079 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5080 INTEGER_CST representing the size of the array minus one (the maximum index),
5081 or NULL_TREE if the array was declared without specifying the size. D is
5082 the iterator within the constructor. */
5085 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5086 tsubst_flags_t complain
)
5089 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5090 unsigned HOST_WIDE_INT max_index_cst
= 0;
5091 unsigned HOST_WIDE_INT index
;
5093 /* The initializer for an array is always a CONSTRUCTOR. */
5094 new_init
= build_constructor (init_list_type_node
, NULL
);
5098 /* Minus 1 is used for zero sized arrays. */
5099 if (integer_all_onesp (max_index
))
5102 if (tree_fits_uhwi_p (max_index
))
5103 max_index_cst
= tree_to_uhwi (max_index
);
5104 /* sizetype is sign extended, not zero extended. */
5106 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5109 /* Loop until there are no more initializers. */
5111 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5115 constructor_elt
*old_cur
= d
->cur
;
5117 check_array_designated_initializer (d
->cur
, index
);
5118 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5120 if (elt_init
== error_mark_node
)
5121 return error_mark_node
;
5122 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5123 size_int (index
), elt_init
);
5124 if (!TREE_CONSTANT (elt_init
))
5125 TREE_CONSTANT (new_init
) = false;
5127 /* This can happen with an invalid initializer (c++/54501). */
5128 if (d
->cur
== old_cur
&& !sized_array_p
)
5135 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5136 Parameters are the same of reshape_init_r. */
5139 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5141 tree max_index
= NULL_TREE
;
5143 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5145 if (TYPE_DOMAIN (type
))
5146 max_index
= array_type_nelts (type
);
5148 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5151 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5152 Parameters are the same of reshape_init_r. */
5155 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5157 tree max_index
= NULL_TREE
;
5159 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5161 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5163 tree value
= d
->cur
->value
;
5164 if (!same_type_p (TREE_TYPE (value
), type
))
5166 if (complain
& tf_error
)
5167 error ("invalid type %qT as initializer for a vector of type %qT",
5168 TREE_TYPE (d
->cur
->value
), type
);
5169 value
= error_mark_node
;
5175 /* For a vector, we initialize it as an array of the appropriate size. */
5176 if (TREE_CODE (type
) == VECTOR_TYPE
)
5177 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5179 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5182 /* Subroutine of reshape_init_r, processes the initializers for classes
5183 or union. Parameters are the same of reshape_init_r. */
5186 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5187 tsubst_flags_t complain
)
5192 gcc_assert (CLASS_TYPE_P (type
));
5194 /* The initializer for a class is always a CONSTRUCTOR. */
5195 new_init
= build_constructor (init_list_type_node
, NULL
);
5196 field
= next_initializable_field (TYPE_FIELDS (type
));
5202 An initializer for an aggregate member that is an
5203 empty class shall have the form of an empty
5204 initializer-list {}. */
5205 if (!first_initializer_p
)
5207 if (complain
& tf_error
)
5208 error ("initializer for %qT must be brace-enclosed", type
);
5209 return error_mark_node
;
5214 /* Loop through the initializable fields, gathering initializers. */
5215 while (d
->cur
!= d
->end
)
5218 constructor_elt
*old_cur
= d
->cur
;
5220 /* Handle designated initializers, as an extension. */
5223 if (d
->cur
->index
== error_mark_node
)
5224 return error_mark_node
;
5226 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5228 if (complain
& tf_error
)
5229 error ("%<[%E] =%> used in a GNU-style designated initializer"
5230 " for class %qT", d
->cur
->index
, type
);
5231 return error_mark_node
;
5234 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5235 /* We already reshaped this. */
5236 gcc_assert (d
->cur
->index
== field
);
5238 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5240 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5242 if (complain
& tf_error
)
5243 error ("%qT has no non-static data member named %qD", type
,
5245 return error_mark_node
;
5249 /* If we processed all the member of the class, we are done. */
5253 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5254 /*first_initializer_p=*/false, complain
);
5255 if (field_init
== error_mark_node
)
5256 return error_mark_node
;
5258 if (d
->cur
== old_cur
&& d
->cur
->index
)
5260 /* This can happen with an invalid initializer for a flexible
5261 array member (c++/54441). */
5262 if (complain
& tf_error
)
5263 error ("invalid initializer for %q#D", field
);
5264 return error_mark_node
;
5267 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5271 When a union is initialized with a brace-enclosed
5272 initializer, the braces shall only contain an
5273 initializer for the first member of the union. */
5274 if (TREE_CODE (type
) == UNION_TYPE
)
5277 field
= next_initializable_field (DECL_CHAIN (field
));
5283 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5284 designators are not valid; either complain or return true to indicate
5285 that reshape_init_r should return error_mark_node. */
5288 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5292 if (complain
& tf_error
)
5293 error ("C99 designator %qE outside aggregate initializer",
5301 /* Subroutine of reshape_init, which processes a single initializer (part of
5302 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5303 iterator within the CONSTRUCTOR which points to the initializer to process.
5304 FIRST_INITIALIZER_P is true if this is the first initializer of the
5305 outermost CONSTRUCTOR node. */
5308 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5309 tsubst_flags_t complain
)
5311 tree init
= d
->cur
->value
;
5313 if (error_operand_p (init
))
5314 return error_mark_node
;
5316 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5317 && has_designator_problem (d
, complain
))
5318 return error_mark_node
;
5320 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5322 /* A complex type can be initialized from one or two initializers,
5323 but braces are not elided. */
5325 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5327 if (CONSTRUCTOR_NELTS (init
) > 2)
5329 if (complain
& tf_error
)
5330 error ("too many initializers for %qT", type
);
5332 return error_mark_node
;
5335 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5337 vec
<constructor_elt
, va_gc
> *v
= 0;
5338 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5339 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5340 if (has_designator_problem (d
, complain
))
5341 return error_mark_node
;
5343 init
= build_constructor (init_list_type_node
, v
);
5348 /* A non-aggregate type is always initialized with a single
5350 if (!CP_AGGREGATE_TYPE_P (type
))
5352 /* It is invalid to initialize a non-aggregate type with a
5353 brace-enclosed initializer before C++0x.
5354 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5355 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5356 a CONSTRUCTOR (with a record type). */
5357 if (TREE_CODE (init
) == CONSTRUCTOR
5358 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5360 if (SCALAR_TYPE_P (type
))
5362 if (complain
& tf_error
)
5363 error ("braces around scalar initializer for type %qT", type
);
5364 init
= error_mark_node
;
5367 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5376 All implicit type conversions (clause _conv_) are considered when
5377 initializing the aggregate member with an initializer from an
5378 initializer-list. If the initializer can initialize a member,
5379 the member is initialized. Otherwise, if the member is itself a
5380 non-empty subaggregate, brace elision is assumed and the
5381 initializer is considered for the initialization of the first
5382 member of the subaggregate. */
5383 if (TREE_CODE (init
) != CONSTRUCTOR
5384 /* But don't try this for the first initializer, since that would be
5385 looking through the outermost braces; A a2 = { a1 }; is not a
5386 valid aggregate initialization. */
5387 && !first_initializer_p
5388 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5389 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5396 /* [dcl.init.string]
5398 A char array (whether plain char, signed char, or unsigned char)
5399 can be initialized by a string-literal (optionally enclosed in
5400 braces); a wchar_t array can be initialized by a wide
5401 string-literal (optionally enclosed in braces). */
5402 if (TREE_CODE (type
) == ARRAY_TYPE
5403 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5405 tree str_init
= init
;
5407 /* Strip one level of braces if and only if they enclose a single
5408 element (as allowed by [dcl.init.string]). */
5409 if (!first_initializer_p
5410 && TREE_CODE (str_init
) == CONSTRUCTOR
5411 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5413 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5416 /* If it's a string literal, then it's the initializer for the array
5417 as a whole. Otherwise, continue with normal initialization for
5418 array types (one value per array element). */
5419 if (TREE_CODE (str_init
) == STRING_CST
)
5421 if (has_designator_problem (d
, complain
))
5422 return error_mark_node
;
5428 /* The following cases are about aggregates. If we are not within a full
5429 initializer already, and there is not a CONSTRUCTOR, it means that there
5430 is a missing set of braces (that is, we are processing the case for
5431 which reshape_init exists). */
5432 if (!first_initializer_p
)
5434 if (TREE_CODE (init
) == CONSTRUCTOR
)
5436 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5437 /* There is no need to reshape pointer-to-member function
5438 initializers, as they are always constructed correctly
5439 by the front end. */
5441 else if (COMPOUND_LITERAL_P (init
))
5442 /* For a nested compound literal, there is no need to reshape since
5443 brace elision is not allowed. Even if we decided to allow it,
5444 we should add a call to reshape_init in finish_compound_literal,
5445 before calling digest_init, so changing this code would still
5446 not be necessary. */
5447 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5451 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5452 return reshape_init (type
, init
, complain
);
5456 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5460 /* Dispatch to specialized routines. */
5461 if (CLASS_TYPE_P (type
))
5462 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5463 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5464 return reshape_init_array (type
, d
, complain
);
5465 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5466 return reshape_init_vector (type
, d
, complain
);
5471 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5472 brace-enclosed aggregate initializer.
5474 INIT is the CONSTRUCTOR containing the list of initializers describing
5475 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5476 It may not presently match the shape of the TYPE; for example:
5478 struct S { int a; int b; };
5479 struct S a[] = { 1, 2, 3, 4 };
5481 Here INIT will hold a vector of four elements, rather than a
5482 vector of two elements, each itself a vector of two elements. This
5483 routine transforms INIT from the former form into the latter. The
5484 revised CONSTRUCTOR node is returned. */
5487 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5489 vec
<constructor_elt
, va_gc
> *v
;
5493 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5495 v
= CONSTRUCTOR_ELTS (init
);
5497 /* An empty constructor does not need reshaping, and it is always a valid
5499 if (vec_safe_is_empty (v
))
5502 /* Recurse on this CONSTRUCTOR. */
5504 d
.end
= d
.cur
+ v
->length ();
5506 new_init
= reshape_init_r (type
, &d
, true, complain
);
5507 if (new_init
== error_mark_node
)
5508 return error_mark_node
;
5510 /* Make sure all the element of the constructor were used. Otherwise,
5511 issue an error about exceeding initializers. */
5514 if (complain
& tf_error
)
5515 error ("too many initializers for %qT", type
);
5517 return error_mark_node
;
5523 /* Verify array initializer. Returns true if errors have been reported. */
5526 check_array_initializer (tree decl
, tree type
, tree init
)
5528 tree element_type
= TREE_TYPE (type
);
5530 /* The array type itself need not be complete, because the
5531 initializer may tell us how many elements are in the array.
5532 But, the elements of the array must be complete. */
5533 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5536 error ("elements of array %q#D have incomplete type", decl
);
5538 error ("elements of array %q#T have incomplete type", type
);
5541 /* A compound literal can't have variable size. */
5543 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5544 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5546 error ("variable-sized compound literal");
5552 /* Subroutine of check_initializer; args are passed down from that function.
5553 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5556 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5559 gcc_assert (stmts_are_full_exprs_p ());
5560 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5563 /* Verify INIT (the initializer for DECL), and record the
5564 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5565 grok_reference_init.
5567 If the return value is non-NULL, it is an expression that must be
5568 evaluated dynamically to initialize DECL. */
5571 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5573 tree type
= TREE_TYPE (decl
);
5574 tree init_code
= NULL
;
5575 tree extra_init
= NULL_TREE
;
5578 /* Things that are going to be initialized need to have complete
5580 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5582 if (DECL_HAS_VALUE_EXPR_P (decl
))
5584 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5585 it doesn't have storage to be initialized. */
5586 gcc_assert (init
== NULL_TREE
);
5590 if (type
== error_mark_node
)
5591 /* We will have already complained. */
5594 if (TREE_CODE (type
) == ARRAY_TYPE
)
5596 if (check_array_initializer (decl
, type
, init
))
5599 else if (!COMPLETE_TYPE_P (type
))
5601 error ("%q#D has incomplete type", decl
);
5602 TREE_TYPE (decl
) = error_mark_node
;
5606 /* There is no way to make a variable-sized class type in GNU C++. */
5607 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5609 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5611 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5612 if (SCALAR_TYPE_P (type
))
5616 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5617 init
= build_zero_init (type
, NULL_TREE
, false);
5619 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5621 error ("scalar object %qD requires one element in initializer",
5623 TREE_TYPE (decl
) = error_mark_node
;
5629 if (TREE_CODE (decl
) == CONST_DECL
)
5631 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5633 DECL_INITIAL (decl
) = init
;
5635 gcc_assert (init
!= NULL_TREE
);
5638 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5640 else if (init
|| type_build_ctor_call (type
)
5641 || TREE_CODE (type
) == REFERENCE_TYPE
)
5643 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5645 init
= grok_reference_init (decl
, type
, init
, flags
);
5646 flags
|= LOOKUP_ALREADY_DIGESTED
;
5649 check_for_uninitialized_const_var (decl
);
5650 /* Do not reshape constructors of vectors (they don't need to be
5652 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5654 if (is_std_init_list (type
))
5656 init
= perform_implicit_conversion (type
, init
,
5657 tf_warning_or_error
);
5658 flags
|= LOOKUP_ALREADY_DIGESTED
;
5660 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5662 /* Don't reshape if the class has constructors. */
5663 if (cxx_dialect
== cxx98
)
5664 error ("in C++98 %qD must be initialized by constructor, "
5668 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5670 error ("opaque vector types cannot be initialized");
5671 init
= error_mark_node
;
5675 init
= reshape_init (type
, init
, tf_warning_or_error
);
5676 if (SCALAR_TYPE_P (type
))
5677 check_narrowing (type
, init
);
5681 /* If DECL has an array type without a specific bound, deduce the
5682 array size from the initializer. */
5683 maybe_deduce_size_from_array_init (decl
, init
);
5684 type
= TREE_TYPE (decl
);
5685 if (type
== error_mark_node
)
5688 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5689 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5690 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5691 && CP_AGGREGATE_TYPE_P (type
)
5692 && (CLASS_TYPE_P (type
)
5693 || !TYPE_NEEDS_CONSTRUCTING (type
)
5694 || type_has_extended_temps (type
))))
5696 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5698 /* A constructor call is a non-trivial initializer even if
5699 it isn't explicitly written. */
5700 if (TREE_SIDE_EFFECTS (init_code
))
5701 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5703 /* If this is a constexpr initializer, expand_default_init will
5704 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5705 case, pull the initializer back out and pass it down into
5706 store_init_value. */
5707 while (TREE_CODE (init_code
) == EXPR_STMT
5708 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5709 init_code
= TREE_OPERAND (init_code
, 0);
5710 if (TREE_CODE (init_code
) == INIT_EXPR
)
5712 init
= TREE_OPERAND (init_code
, 1);
5713 init_code
= NULL_TREE
;
5714 /* Don't call digest_init; it's unnecessary and will complain
5715 about aggregate initialization of non-aggregate classes. */
5716 flags
|= LOOKUP_ALREADY_DIGESTED
;
5718 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5720 /* Declared constexpr, but no suitable initializer; massage
5721 init appropriately so we can pass it into store_init_value
5723 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5724 init
= finish_compound_literal (type
, init
,
5725 tf_warning_or_error
);
5726 else if (CLASS_TYPE_P (type
)
5727 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5729 init
= build_functional_cast (type
, init
, tf_none
);
5730 if (TREE_CODE (init
) == TARGET_EXPR
)
5731 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5733 init_code
= NULL_TREE
;
5739 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5741 /* In aggregate initialization of a variable, each element
5742 initialization is a full-expression because there is no
5743 enclosing expression. */
5744 gcc_assert (stmts_are_full_exprs_p ());
5746 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5748 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5749 && DECL_INITIAL (decl
)
5750 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5751 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5752 warning (0, "array %qD initialized by parenthesized string literal %qE",
5753 decl
, DECL_INITIAL (decl
));
5759 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5760 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5761 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5762 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5765 check_for_uninitialized_const_var (decl
);
5768 if (init
&& init
!= error_mark_node
)
5769 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5772 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5774 if (init_code
&& DECL_IN_AGGR_P (decl
))
5776 static int explained
= 0;
5778 if (cxx_dialect
< cxx11
)
5779 error ("initializer invalid for static member with constructor");
5781 error ("non-constant in-class initialization invalid for static "
5782 "member %qD", decl
);
5785 error ("(an out of class initialization is required)");
5793 /* If DECL is not a local variable, give it RTL. */
5796 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5798 int toplev
= toplevel_bindings_p ();
5800 const char *filename
;
5802 /* Set the DECL_ASSEMBLER_NAME for the object. */
5805 /* The `register' keyword, when used together with an
5806 asm-specification, indicates that the variable should be
5807 placed in a particular register. */
5808 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5810 set_user_assembler_name (decl
, asmspec
);
5811 DECL_HARD_REGISTER (decl
) = 1;
5815 if (TREE_CODE (decl
) == FUNCTION_DECL
5816 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5817 set_builtin_user_assembler_name (decl
, asmspec
);
5818 set_user_assembler_name (decl
, asmspec
);
5822 /* Handle non-variables up front. */
5825 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5829 /* If we see a class member here, it should be a static data
5831 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5833 gcc_assert (TREE_STATIC (decl
));
5834 /* An in-class declaration of a static data member should be
5835 external; it is only a declaration, and not a definition. */
5836 if (init
== NULL_TREE
)
5837 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5840 /* We don't create any RTL for local variables. */
5841 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5844 /* We defer emission of local statics until the corresponding
5845 DECL_EXPR is expanded. */
5846 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5848 /* We try to defer namespace-scope static constants so that they are
5849 not emitted into the object file unnecessarily. */
5850 filename
= input_filename
;
5851 if (!DECL_VIRTUAL_P (decl
)
5852 && TREE_READONLY (decl
)
5853 && DECL_INITIAL (decl
) != NULL_TREE
5854 && DECL_INITIAL (decl
) != error_mark_node
5856 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5858 && !TREE_PUBLIC (decl
))
5860 /* Fool with the linkage of static consts according to #pragma
5862 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5863 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5865 TREE_PUBLIC (decl
) = 1;
5866 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5871 /* Likewise for template instantiations. */
5872 else if (DECL_LANG_SPECIFIC (decl
)
5873 && DECL_IMPLICIT_INSTANTIATION (decl
))
5876 /* If we're not deferring, go ahead and assemble the variable. */
5878 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5881 /* walk_tree helper for wrap_temporary_cleanups, below. */
5884 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5886 /* Stop at types or full-expression boundaries. */
5887 if (TYPE_P (*stmt_p
)
5888 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5894 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5896 tree guard
= (tree
)data
;
5897 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5899 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5900 /* Tell honor_protect_cleanup_actions to handle this as a separate
5902 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5904 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5910 /* We're initializing a local variable which has a cleanup GUARD. If there
5911 are any temporaries used in the initializer INIT of this variable, we
5912 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5913 variable will be cleaned up properly if one of them throws.
5915 Unfortunately, there's no way to express this properly in terms of
5916 nesting, as the regions for the temporaries overlap the region for the
5917 variable itself; if there are two temporaries, the variable needs to be
5918 the first thing destroyed if either of them throws. However, we only
5919 want to run the variable's cleanup if it actually got constructed. So
5920 we need to guard the temporary cleanups with the variable's cleanup if
5921 they are run on the normal path, but not if they are run on the
5922 exceptional path. We implement this by telling
5923 honor_protect_cleanup_actions to strip the variable cleanup from the
5924 exceptional path. */
5927 wrap_temporary_cleanups (tree init
, tree guard
)
5929 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5932 /* Generate code to initialize DECL (a local variable). */
5935 initialize_local_var (tree decl
, tree init
)
5937 tree type
= TREE_TYPE (decl
);
5941 gcc_assert (VAR_P (decl
)
5942 || TREE_CODE (decl
) == RESULT_DECL
);
5943 gcc_assert (!TREE_STATIC (decl
));
5945 if (DECL_SIZE (decl
) == NULL_TREE
)
5947 /* If we used it already as memory, it must stay in memory. */
5948 DECL_INITIAL (decl
) = NULL_TREE
;
5949 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5953 if (type
== error_mark_node
)
5956 /* Compute and store the initial value. */
5957 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5958 if (TREE_USED (type
))
5959 DECL_READ_P (decl
) = 1;
5961 /* Generate a cleanup, if necessary. */
5962 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5964 /* Perform the initialization. */
5967 if (TREE_CODE (init
) == INIT_EXPR
5968 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5970 /* Stick simple initializers in DECL_INITIAL so that
5971 -Wno-init-self works (c++/34772). */
5972 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5973 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5977 int saved_stmts_are_full_exprs_p
;
5979 /* If we're only initializing a single object, guard the
5980 destructors of any temporaries used in its initializer with
5981 its destructor. This isn't right for arrays because each
5982 element initialization is a full-expression. */
5983 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5984 wrap_temporary_cleanups (init
, cleanup
);
5986 gcc_assert (building_stmt_list_p ());
5987 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5988 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5989 finish_expr_stmt (init
);
5990 current_stmt_tree ()->stmts_are_full_exprs_p
=
5991 saved_stmts_are_full_exprs_p
;
5995 /* Set this to 0 so we can tell whether an aggregate which was
5996 initialized was ever used. Don't do this if it has a
5997 destructor, so we don't complain about the 'resource
5998 allocation is initialization' idiom. Now set
5999 attribute((unused)) on types so decls of that type will be
6000 marked used. (see TREE_USED, above.) */
6001 if (TYPE_NEEDS_CONSTRUCTING (type
)
6003 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6004 && DECL_NAME (decl
))
6005 TREE_USED (decl
) = 0;
6006 else if (already_used
)
6007 TREE_USED (decl
) = 1;
6010 finish_decl_cleanup (decl
, cleanup
);
6013 /* DECL is a VAR_DECL for a compiler-generated variable with static
6014 storage duration (like a virtual table) whose initializer is a
6015 compile-time constant. Initialize the variable and provide it to the
6019 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6022 gcc_assert (DECL_ARTIFICIAL (decl
));
6023 init
= build_constructor (TREE_TYPE (decl
), v
);
6024 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6025 DECL_INITIAL (decl
) = init
;
6026 DECL_INITIALIZED_P (decl
) = 1;
6027 determine_visibility (decl
);
6028 layout_var_decl (decl
);
6029 maybe_commonize_var (decl
);
6030 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6033 /* INIT is the initializer for a variable, as represented by the
6034 parser. Returns true iff INIT is type-dependent. */
6037 type_dependent_init_p (tree init
)
6039 if (TREE_CODE (init
) == TREE_LIST
)
6040 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6041 return any_type_dependent_elements_p (init
);
6042 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6043 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6045 vec
<constructor_elt
, va_gc
> *elts
;
6049 elts
= CONSTRUCTOR_ELTS (init
);
6050 nelts
= vec_safe_length (elts
);
6051 for (i
= 0; i
< nelts
; ++i
)
6052 if (type_dependent_init_p ((*elts
)[i
].value
))
6056 /* It must be a simple expression, e.g., int i = 3; */
6057 return type_dependent_expression_p (init
);
6062 /* INIT is the initializer for a variable, as represented by the
6063 parser. Returns true iff INIT is value-dependent. */
6066 value_dependent_init_p (tree init
)
6068 if (TREE_CODE (init
) == TREE_LIST
)
6069 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6070 return any_value_dependent_elements_p (init
);
6071 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6072 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6074 vec
<constructor_elt
, va_gc
> *elts
;
6078 elts
= CONSTRUCTOR_ELTS (init
);
6079 nelts
= vec_safe_length (elts
);
6080 for (i
= 0; i
< nelts
; ++i
)
6081 if (value_dependent_init_p ((*elts
)[i
].value
))
6085 /* It must be a simple expression, e.g., int i = 3; */
6086 return value_dependent_expression_p (init
);
6091 /* Finish processing of a declaration;
6092 install its line number and initial value.
6093 If the length of an array type is not known before,
6094 it must be determined now, from the initial value, or it is an error.
6096 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6097 true, then INIT is an integral constant expression.
6099 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6100 if the (init) syntax was used. */
6103 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6104 tree asmspec_tree
, int flags
)
6107 vec
<tree
, va_gc
> *cleanups
= NULL
;
6108 const char *asmspec
= NULL
;
6109 int was_readonly
= 0;
6110 bool var_definition_p
= false;
6113 if (decl
== error_mark_node
)
6118 error ("assignment (not initialization) in declaration");
6122 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6123 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6124 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6126 type
= TREE_TYPE (decl
);
6127 if (type
== error_mark_node
)
6130 /* If a name was specified, get the string. */
6131 if (at_namespace_scope_p ())
6132 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6133 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6134 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6136 if (current_class_type
6137 && CP_DECL_CONTEXT (decl
) == current_class_type
6138 && TYPE_BEING_DEFINED (current_class_type
)
6139 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6140 && (DECL_INITIAL (decl
) || init
))
6141 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6143 if (TREE_CODE (decl
) != FUNCTION_DECL
6144 && (auto_node
= type_uses_auto (type
)))
6147 if (init
== NULL_TREE
)
6149 if (DECL_LANG_SPECIFIC (decl
)
6150 && DECL_TEMPLATE_INSTANTIATION (decl
)
6151 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6153 /* init is null because we're deferring instantiating the
6154 initializer until we need it. Well, we need it now. */
6155 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6159 error ("declaration of %q#D has no initializer", decl
);
6160 TREE_TYPE (decl
) = error_mark_node
;
6164 if (TREE_CODE (d_init
) == TREE_LIST
)
6165 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6166 tf_warning_or_error
);
6167 d_init
= resolve_nondeduced_context (d_init
);
6168 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6170 if (type
== error_mark_node
)
6172 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6175 if (!ensure_literal_type_for_constexpr_object (decl
))
6176 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6179 && DECL_CLASS_SCOPE_P (decl
)
6180 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6181 check_static_variable_definition (decl
, type
);
6183 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6186 if (init
== ridpointers
[(int)RID_DELETE
])
6188 /* FIXME check this is 1st decl. */
6189 DECL_DELETED_FN (decl
) = 1;
6190 DECL_DECLARED_INLINE_P (decl
) = 1;
6191 DECL_INITIAL (decl
) = error_mark_node
;
6192 FOR_EACH_CLONE (clone
, decl
)
6194 DECL_DELETED_FN (clone
) = 1;
6195 DECL_DECLARED_INLINE_P (clone
) = 1;
6196 DECL_INITIAL (clone
) = error_mark_node
;
6200 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6202 if (defaultable_fn_check (decl
))
6203 DECL_DEFAULTED_FN (decl
) = 1;
6205 DECL_INITIAL (decl
) = NULL_TREE
;
6209 if (init
&& VAR_P (decl
))
6211 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6212 /* If DECL is a reference, then we want to know whether init is a
6213 reference constant; init_const_expr_p as passed tells us whether
6214 it's an rvalue constant. */
6215 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6216 init_const_expr_p
= potential_constant_expression (init
);
6217 if (init_const_expr_p
)
6219 /* Set these flags now for templates. We'll update the flags in
6220 store_init_value for instantiations. */
6221 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6222 if (decl_maybe_constant_var_p (decl
))
6223 TREE_CONSTANT (decl
) = 1;
6227 if (processing_template_decl
)
6229 bool type_dependent_p
;
6231 /* Add this declaration to the statement-tree. */
6232 if (at_function_scope_p ())
6233 add_decl_expr (decl
);
6235 type_dependent_p
= dependent_type_p (type
);
6237 if (check_for_bare_parameter_packs (init
))
6240 DECL_INITIAL (decl
) = NULL_TREE
;
6243 /* Generally, initializers in templates are expanded when the
6244 template is instantiated. But, if DECL is a variable constant
6245 then it can be used in future constant expressions, so its value
6246 must be available. */
6248 if (!VAR_P (decl
) || dependent_type_p (type
))
6249 /* We can't do anything if the decl has dependent type. */;
6251 && init_const_expr_p
6252 && !type_dependent_p
6253 && decl_maybe_constant_var_p (decl
)
6254 && !type_dependent_init_p (init
)
6255 && !value_dependent_init_p (init
))
6257 /* This variable seems to be a non-dependent constant, so process
6258 its initializer. If check_initializer returns non-null the
6259 initialization wasn't constant after all. */
6261 cleanups
= make_tree_vector ();
6262 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6263 if (init_code
== NULL_TREE
)
6265 release_tree_vector (cleanups
);
6267 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6269 /* Deduce array size even if the initializer is dependent. */
6270 maybe_deduce_size_from_array_init (decl
, init
);
6271 /* And complain about multiple initializers. */
6272 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6273 && !MAYBE_CLASS_TYPE_P (type
))
6274 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6275 tf_warning_or_error
);
6279 DECL_INITIAL (decl
) = init
;
6283 /* Just store non-static data member initializers for later. */
6284 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6285 DECL_INITIAL (decl
) = init
;
6287 /* Take care of TYPE_DECLs up front. */
6288 if (TREE_CODE (decl
) == TYPE_DECL
)
6290 if (type
!= error_mark_node
6291 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6293 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6294 warning (0, "shadowing previous type declaration of %q#D", decl
);
6295 set_identifier_type_value (DECL_NAME (decl
), decl
);
6298 /* If we have installed this as the canonical typedef for this
6299 type, and that type has not been defined yet, delay emitting
6300 the debug information for it, as we will emit it later. */
6301 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6302 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6303 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6305 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6310 /* A reference will be modified here, as it is initialized. */
6311 if (! DECL_EXTERNAL (decl
)
6312 && TREE_READONLY (decl
)
6313 && TREE_CODE (type
) == REFERENCE_TYPE
)
6316 TREE_READONLY (decl
) = 0;
6321 /* If this is a local variable that will need a mangled name,
6322 register it now. We must do this before processing the
6323 initializer for the variable, since the initialization might
6324 require a guard variable, and since the mangled name of the
6325 guard variable will depend on the mangled name of this
6327 if (DECL_FUNCTION_SCOPE_P (decl
)
6328 && TREE_STATIC (decl
)
6329 && !DECL_ARTIFICIAL (decl
))
6331 push_local_name (decl
);
6332 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6333 || DECL_DESTRUCTOR_P (current_function_decl
))
6334 /* Normally local_decls is populated during GIMPLE lowering,
6335 but [cd]tors are never actually compiled directly. We need
6336 to put statics on the list so we can deal with the label
6337 address extension. FIXME. */
6338 add_local_decl (cfun
, decl
);
6341 /* Convert the initializer to the type of DECL, if we have not
6342 already initialized DECL. */
6343 if (!DECL_INITIALIZED_P (decl
)
6344 /* If !DECL_EXTERNAL then DECL is being defined. In the
6345 case of a static data member initialized inside the
6346 class-specifier, there can be an initializer even if DECL
6347 is *not* defined. */
6348 && (!DECL_EXTERNAL (decl
) || init
))
6350 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6353 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6354 /* Allow libjava/prims.cc define primitive classes. */
6355 if (init
!= NULL_TREE
6356 || jclass
== NULL_TREE
6357 || TREE_CODE (jclass
) != TYPE_DECL
6358 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6359 || !same_type_ignoring_top_level_qualifiers_p
6360 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6361 error ("Java object %qD not allocated with %<new%>", decl
);
6364 cleanups
= make_tree_vector ();
6365 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6371 The memory occupied by any object of static storage
6372 duration is zero-initialized at program startup before
6373 any other initialization takes place.
6375 We cannot create an appropriate initializer until after
6376 the type of DECL is finalized. If DECL_INITIAL is set,
6377 then the DECL is statically initialized, and any
6378 necessary zero-initialization has already been performed. */
6379 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6380 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6381 /*nelts=*/NULL_TREE
,
6382 /*static_storage_p=*/true);
6383 /* Remember that the initialization for this variable has
6385 DECL_INITIALIZED_P (decl
) = 1;
6386 /* This declaration is the definition of this variable,
6387 unless we are initializing a static data member within
6388 the class specifier. */
6389 if (!DECL_EXTERNAL (decl
))
6390 var_definition_p
= true;
6392 /* If the variable has an array type, lay out the type, even if
6393 there is no initializer. It is valid to index through the
6394 array, and we must get TYPE_ALIGN set correctly on the array
6396 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6399 if (TREE_STATIC (decl
)
6400 && !at_function_scope_p ()
6401 && current_function_decl
== NULL
)
6402 /* So decl is a global variable or a static member of a
6403 non local class. Record the types it uses
6404 so that we can decide later to emit debug info for them. */
6405 record_types_used_by_current_var_decl (decl
);
6407 else if (TREE_CODE (decl
) == FIELD_DECL
6408 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6409 error ("non-static data member %qD has Java class type", decl
);
6411 /* Add this declaration to the statement-tree. This needs to happen
6412 after the call to check_initializer so that the DECL_EXPR for a
6413 reference temp is added before the DECL_EXPR for the reference itself. */
6414 if (DECL_FUNCTION_SCOPE_P (decl
))
6415 add_decl_expr (decl
);
6417 /* Let the middle end know about variables and functions -- but not
6418 static data members in uninstantiated class templates. */
6419 if (VAR_OR_FUNCTION_DECL_P (decl
))
6423 layout_var_decl (decl
);
6424 maybe_commonize_var (decl
);
6427 /* This needs to happen after the linkage is set. */
6428 determine_visibility (decl
);
6430 if (var_definition_p
&& TREE_STATIC (decl
))
6432 /* If a TREE_READONLY variable needs initialization
6433 at runtime, it is no longer readonly and we need to
6434 avoid MEM_READONLY_P being set on RTL created for it. */
6437 if (TREE_READONLY (decl
))
6438 TREE_READONLY (decl
) = 0;
6441 else if (was_readonly
)
6442 TREE_READONLY (decl
) = 1;
6444 /* Likewise if it needs destruction. */
6445 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6446 TREE_READONLY (decl
) = 0;
6449 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6451 /* Check for abstractness of the type. Notice that there is no
6452 need to strip array types here since the check for those types
6453 is already done within create_array_type_for_decl. */
6454 abstract_virtuals_error (decl
, type
);
6456 if (TREE_TYPE (decl
) == error_mark_node
)
6457 /* No initialization required. */
6459 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6463 if (init
== ridpointers
[(int)RID_DEFAULT
])
6465 /* An out-of-class default definition is defined at
6466 the point where it is explicitly defaulted. */
6467 if (DECL_DELETED_FN (decl
))
6468 maybe_explain_implicit_delete (decl
);
6469 else if (DECL_INITIAL (decl
) == error_mark_node
)
6470 synthesize_method (decl
);
6473 error ("function %q#D is initialized like a variable", decl
);
6475 /* else no initialization required. */
6477 else if (DECL_EXTERNAL (decl
)
6478 && ! (DECL_LANG_SPECIFIC (decl
)
6479 && DECL_NOT_REALLY_EXTERN (decl
)))
6482 DECL_INITIAL (decl
) = init
;
6484 /* A variable definition. */
6485 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6486 /* Initialize the local variable. */
6487 initialize_local_var (decl
, init
);
6489 /* If a variable is defined, and then a subsequent
6490 definition with external linkage is encountered, we will
6491 get here twice for the same variable. We want to avoid
6492 calling expand_static_init more than once. For variables
6493 that are not static data members, we can call
6494 expand_static_init only when we actually process the
6495 initializer. It is not legal to redeclare a static data
6496 member, so this issue does not arise in that case. */
6497 else if (var_definition_p
&& TREE_STATIC (decl
))
6498 expand_static_init (decl
, init
);
6501 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6502 reference, insert it in the statement-tree now. */
6506 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6507 push_cleanup (decl
, t
, false);
6508 release_tree_vector (cleanups
);
6512 TREE_READONLY (decl
) = 1;
6514 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6517 /* Returns a declaration for a VAR_DECL as if:
6519 extern "C" TYPE NAME;
6521 had been seen. Used to create compiler-generated global
6525 declare_global_var (tree name
, tree type
)
6529 push_to_top_level ();
6530 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6531 TREE_PUBLIC (decl
) = 1;
6532 DECL_EXTERNAL (decl
) = 1;
6533 DECL_ARTIFICIAL (decl
) = 1;
6534 /* If the user has explicitly declared this variable (perhaps
6535 because the code we are compiling is part of a low-level runtime
6536 library), then it is possible that our declaration will be merged
6537 with theirs by pushdecl. */
6538 decl
= pushdecl (decl
);
6539 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6540 pop_from_top_level ();
6545 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6546 if "__cxa_atexit" is not being used) corresponding to the function
6547 to be called when the program exits. */
6550 get_atexit_fn_ptr_type (void)
6554 if (!atexit_fn_ptr_type_node
)
6557 if (flag_use_cxa_atexit
6558 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6559 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6560 arg_type
= ptr_type_node
;
6562 /* The parameter to "atexit" is "void (*)(void)". */
6563 arg_type
= NULL_TREE
;
6565 fn_type
= build_function_type_list (void_type_node
,
6566 arg_type
, NULL_TREE
);
6567 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6570 return atexit_fn_ptr_type_node
;
6573 /* Returns a pointer to the `atexit' function. Note that if
6574 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6575 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6578 get_atexit_node (void)
6584 bool use_aeabi_atexit
;
6589 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6591 /* The declaration for `__cxa_atexit' is:
6593 int __cxa_atexit (void (*)(void *), void *, void *)
6595 We build up the argument types and then the function type
6597 tree argtype0
, argtype1
, argtype2
;
6599 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6600 /* First, build the pointer-to-function type for the first
6602 fn_ptr_type
= get_atexit_fn_ptr_type ();
6603 /* Then, build the rest of the argument types. */
6604 argtype2
= ptr_type_node
;
6605 if (use_aeabi_atexit
)
6607 argtype1
= fn_ptr_type
;
6608 argtype0
= ptr_type_node
;
6612 argtype1
= ptr_type_node
;
6613 argtype0
= fn_ptr_type
;
6615 /* And the final __cxa_atexit type. */
6616 fn_type
= build_function_type_list (integer_type_node
,
6617 argtype0
, argtype1
, argtype2
,
6619 if (use_aeabi_atexit
)
6620 name
= "__aeabi_atexit";
6622 name
= "__cxa_atexit";
6626 /* The declaration for `atexit' is:
6628 int atexit (void (*)());
6630 We build up the argument types and then the function type
6632 fn_ptr_type
= get_atexit_fn_ptr_type ();
6633 /* Build the final atexit type. */
6634 fn_type
= build_function_type_list (integer_type_node
,
6635 fn_ptr_type
, NULL_TREE
);
6639 /* Now, build the function declaration. */
6640 push_lang_context (lang_name_c
);
6641 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6642 mark_used (atexit_fndecl
);
6643 pop_lang_context ();
6644 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6649 /* Like get_atexit_node, but for thread-local cleanups. */
6652 get_thread_atexit_node (void)
6654 /* The declaration for `__cxa_thread_atexit' is:
6656 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6657 tree fn_type
= build_function_type_list (integer_type_node
,
6658 get_atexit_fn_ptr_type (),
6659 ptr_type_node
, ptr_type_node
,
6662 /* Now, build the function declaration. */
6663 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6664 ECF_LEAF
| ECF_NOTHROW
);
6665 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6668 /* Returns the __dso_handle VAR_DECL. */
6671 get_dso_handle_node (void)
6673 if (dso_handle_node
)
6674 return dso_handle_node
;
6676 /* Declare the variable. */
6677 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6680 #ifdef HAVE_GAS_HIDDEN
6681 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6682 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6685 return dso_handle_node
;
6688 /* Begin a new function with internal linkage whose job will be simply
6689 to destroy some particular variable. */
6691 static GTY(()) int start_cleanup_cnt
;
6694 start_cleanup_fn (void)
6699 bool use_cxa_atexit
= flag_use_cxa_atexit
6700 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6702 push_to_top_level ();
6704 /* No need to mangle this. */
6705 push_lang_context (lang_name_c
);
6707 /* Build the name of the function. */
6708 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6709 /* Build the function declaration. */
6710 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6711 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6712 /* It's a function with internal linkage, generated by the
6714 TREE_PUBLIC (fndecl
) = 0;
6715 DECL_ARTIFICIAL (fndecl
) = 1;
6716 /* Make the function `inline' so that it is only emitted if it is
6717 actually needed. It is unlikely that it will be inlined, since
6718 it is only called via a function pointer, but we avoid unnecessary
6719 emissions this way. */
6720 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6721 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6722 /* Build the parameter. */
6727 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6728 DECL_CONTEXT (parmdecl
) = fndecl
;
6729 TREE_USED (parmdecl
) = 1;
6730 DECL_READ_P (parmdecl
) = 1;
6731 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6735 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6737 pop_lang_context ();
6739 return current_function_decl
;
6742 /* Finish the cleanup function begun by start_cleanup_fn. */
6745 end_cleanup_fn (void)
6747 expand_or_defer_fn (finish_function (0));
6749 pop_from_top_level ();
6752 /* Generate code to handle the destruction of DECL, an object with
6753 static storage duration. */
6756 register_dtor_fn (tree decl
)
6763 bool ob_parm
, dso_parm
, use_dtor
;
6764 tree arg0
, arg1
, arg2
;
6767 type
= TREE_TYPE (decl
);
6768 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6769 return void_zero_node
;
6771 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6772 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6773 destructor to "__cxa_atexit"; we don't have to build a temporary
6774 function to do the cleanup. */
6775 dso_parm
= (flag_use_cxa_atexit
6776 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6777 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6778 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6783 /* Find the destructor. */
6784 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6785 gcc_assert (idx
>= 0);
6786 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6787 /* Make sure it is accessible. */
6788 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6789 tf_warning_or_error
);
6793 /* Call build_cleanup before we enter the anonymous function so
6794 that any access checks will be done relative to the current
6795 scope, rather than the scope of the anonymous function. */
6796 build_cleanup (decl
);
6798 /* Now start the function. */
6799 cleanup
= start_cleanup_fn ();
6801 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6802 to the original function, rather than the anonymous one. That
6803 will make the back end think that nested functions are in use,
6804 which causes confusion. */
6805 push_deferring_access_checks (dk_no_check
);
6806 fcall
= build_cleanup (decl
);
6807 pop_deferring_access_checks ();
6809 /* Create the body of the anonymous function. */
6810 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6811 finish_expr_stmt (fcall
);
6812 finish_compound_stmt (compound_stmt
);
6816 /* Call atexit with the cleanup function. */
6817 mark_used (cleanup
);
6818 cleanup
= build_address (cleanup
);
6820 if (DECL_THREAD_LOCAL_P (decl
))
6821 atex_node
= get_thread_atexit_node ();
6823 atex_node
= get_atexit_node ();
6827 /* We must convert CLEANUP to the type that "__cxa_atexit"
6829 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6830 /* "__cxa_atexit" will pass the address of DECL to the
6831 cleanup function. */
6833 addr
= build_address (decl
);
6834 /* The declared type of the parameter to "__cxa_atexit" is
6835 "void *". For plain "T*", we could just let the
6836 machinery in cp_build_function_call convert it -- but if the
6837 type is "cv-qualified T *", then we need to convert it
6838 before passing it in, to avoid spurious errors. */
6839 addr
= build_nop (ptr_type_node
, addr
);
6842 /* Since the cleanup functions we build ignore the address
6843 they're given, there's no reason to pass the actual address
6844 in, and, in general, it's cheaper to pass NULL than any
6846 addr
= null_pointer_node
;
6849 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6850 tf_warning_or_error
);
6852 /* Just pass NULL to the dso handle parm if we don't actually
6853 have a DSO handle on this target. */
6854 arg2
= null_pointer_node
;
6860 if (!DECL_THREAD_LOCAL_P (decl
)
6861 && targetm
.cxx
.use_aeabi_atexit ())
6877 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6878 arg0
, arg1
, arg2
, NULL_TREE
);
6881 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6882 is its initializer. Generate code to handle the construction
6883 and destruction of DECL. */
6886 expand_static_init (tree decl
, tree init
)
6888 gcc_assert (VAR_P (decl
));
6889 gcc_assert (TREE_STATIC (decl
));
6891 /* Some variables require no dynamic initialization. */
6893 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6895 /* Make sure the destructor is callable. */
6896 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6900 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6901 && !DECL_FUNCTION_SCOPE_P (decl
))
6904 error ("non-local variable %qD declared %<__thread%> "
6905 "needs dynamic initialization", decl
);
6907 error ("non-local variable %qD declared %<__thread%> "
6908 "has a non-trivial destructor", decl
);
6909 static bool informed
;
6912 inform (DECL_SOURCE_LOCATION (decl
),
6913 "C++11 %<thread_local%> allows dynamic initialization "
6920 if (DECL_FUNCTION_SCOPE_P (decl
))
6922 /* Emit code to perform this initialization but once. */
6923 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6924 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6925 tree guard
, guard_addr
;
6927 /* We don't need thread-safety code for thread-local vars. */
6928 bool thread_guard
= (flag_threadsafe_statics
6929 && !DECL_THREAD_LOCAL_P (decl
));
6931 /* Emit code to perform this initialization but once. This code
6934 static <type> guard;
6935 if (!guard.first_byte) {
6936 if (__cxa_guard_acquire (&guard)) {
6939 // Do initialization.
6940 flag = true; __cxa_guard_release (&guard);
6941 // Register variable for destruction at end of program.
6943 if (!flag) __cxa_guard_abort (&guard);
6947 Note that the `flag' variable is only set to 1 *after* the
6948 initialization is complete. This ensures that an exception,
6949 thrown during the construction, will cause the variable to
6950 reinitialized when we pass through this code again, as per:
6954 If the initialization exits by throwing an exception, the
6955 initialization is not complete, so it will be tried again
6956 the next time control enters the declaration.
6958 This process should be thread-safe, too; multiple threads
6959 should not be able to initialize the variable more than
6962 /* Create the guard variable. */
6963 guard
= get_guard (decl
);
6965 /* This optimization isn't safe on targets with relaxed memory
6966 consistency. On such targets we force synchronization in
6967 __cxa_guard_acquire. */
6968 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6970 /* Begin the conditional initialization. */
6971 if_stmt
= begin_if_stmt ();
6972 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6973 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6978 tree vfntype
= NULL_TREE
;
6979 tree acquire_name
, release_name
, abort_name
;
6980 tree acquire_fn
, release_fn
, abort_fn
;
6981 guard_addr
= build_address (guard
);
6983 acquire_name
= get_identifier ("__cxa_guard_acquire");
6984 release_name
= get_identifier ("__cxa_guard_release");
6985 abort_name
= get_identifier ("__cxa_guard_abort");
6986 acquire_fn
= identifier_global_value (acquire_name
);
6987 release_fn
= identifier_global_value (release_name
);
6988 abort_fn
= identifier_global_value (abort_name
);
6990 acquire_fn
= push_library_fn
6991 (acquire_name
, build_function_type_list (integer_type_node
,
6992 TREE_TYPE (guard_addr
),
6994 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
6995 if (!release_fn
|| !abort_fn
)
6996 vfntype
= build_function_type_list (void_type_node
,
6997 TREE_TYPE (guard_addr
),
7000 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7001 ECF_NOTHROW
| ECF_LEAF
);
7003 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7004 ECF_NOTHROW
| ECF_LEAF
);
7006 inner_if_stmt
= begin_if_stmt ();
7007 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7010 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7011 begin
= get_target_expr (boolean_false_node
);
7012 flag
= TARGET_EXPR_SLOT (begin
);
7014 TARGET_EXPR_CLEANUP (begin
)
7015 = build3 (COND_EXPR
, void_type_node
, flag
,
7017 build_call_n (abort_fn
, 1, guard_addr
));
7018 CLEANUP_EH_ONLY (begin
) = 1;
7020 /* Do the initialization itself. */
7021 init
= add_stmt_to_compound (begin
, init
);
7022 init
= add_stmt_to_compound
7023 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7024 init
= add_stmt_to_compound
7025 (init
, build_call_n (release_fn
, 1, guard_addr
));
7028 init
= add_stmt_to_compound (init
, set_guard (guard
));
7030 /* Use atexit to register a function for destroying this static
7032 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7034 finish_expr_stmt (init
);
7038 finish_compound_stmt (inner_then_clause
);
7039 finish_then_clause (inner_if_stmt
);
7040 finish_if_stmt (inner_if_stmt
);
7043 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7045 finish_compound_stmt (then_clause
);
7046 finish_then_clause (if_stmt
);
7047 finish_if_stmt (if_stmt
);
7050 else if (DECL_THREAD_LOCAL_P (decl
))
7051 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7053 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7057 /* Make TYPE a complete type based on INITIAL_VALUE.
7058 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7059 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7060 3 if the initializer list is empty (in pedantic mode). */
7063 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7066 tree type
, elt_type
;
7070 unsigned HOST_WIDE_INT i
;
7073 /* An array of character type can be initialized from a
7074 brace-enclosed string constant.
7076 FIXME: this code is duplicated from reshape_init. Probably
7077 we should just call reshape_init here? */
7078 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7079 && TREE_CODE (initial_value
) == CONSTRUCTOR
7080 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7082 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7083 tree value
= (*v
)[0].value
;
7085 if (TREE_CODE (value
) == STRING_CST
7086 && v
->length () == 1)
7087 initial_value
= value
;
7090 /* If any of the elements are parameter packs, we can't actually
7091 complete this type now because the array size is dependent. */
7092 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7094 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7097 if (PACK_EXPANSION_P (value
))
7103 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7105 /* We can create the array before the element type is complete, which
7106 means that we didn't have these two bits set in the original type
7107 either. In completing the type, we are expected to propagate these
7108 bits. See also complete_type which does the same thing for arrays
7111 if (TYPE_DOMAIN (type
))
7113 elt_type
= TREE_TYPE (type
);
7114 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7115 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7116 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7122 /* As above, but either give an error or reject zero-size arrays, depending
7126 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7127 bool do_default
, tsubst_flags_t complain
)
7130 bool sfinae
= !(complain
& tf_error
);
7131 /* In SFINAE context we can't be lenient about zero-size arrays. */
7134 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7140 /* Not an error. */;
7141 else if (failure
== 1)
7142 error ("initializer fails to determine size of %qT", *ptype
);
7143 else if (failure
== 2)
7146 error ("array size missing in %qT", *ptype
);
7148 else if (failure
== 3)
7149 error ("zero-size array %qT", *ptype
);
7150 *ptype
= error_mark_node
;
7155 /* Return zero if something is declared to be a member of type
7156 CTYPE when in the context of CUR_TYPE. STRING is the error
7157 message to print in that case. Otherwise, quietly return 1. */
7160 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7162 if (ctype
&& ctype
!= cur_type
)
7164 if (flags
== DTOR_FLAG
)
7165 error ("destructor for alien class %qT cannot be a member", ctype
);
7167 error ("constructor for alien class %qT cannot be a member", ctype
);
7173 /* Subroutine of `grokdeclarator'. */
7175 /* Generate errors possibly applicable for a given set of specifiers.
7176 This is for ARM $7.1.2. */
7179 bad_specifiers (tree object
,
7180 enum bad_spec_place type
,
7191 error ("%qD declared as a %<virtual%> variable", object
);
7193 error ("%qD declared as an %<inline%> variable", object
);
7195 error ("%<const%> and %<volatile%> function specifiers on "
7196 "%qD invalid in variable declaration", object
);
7200 error ("%qD declared as a %<virtual%> parameter", object
);
7202 error ("%qD declared as an %<inline%> parameter", object
);
7204 error ("%<const%> and %<volatile%> function specifiers on "
7205 "%qD invalid in parameter declaration", object
);
7209 error ("%qD declared as a %<virtual%> type", object
);
7211 error ("%qD declared as an %<inline%> type", object
);
7213 error ("%<const%> and %<volatile%> function specifiers on "
7214 "%qD invalid in type declaration", object
);
7218 error ("%qD declared as a %<virtual%> field", object
);
7220 error ("%qD declared as an %<inline%> field", object
);
7222 error ("%<const%> and %<volatile%> function specifiers on "
7223 "%qD invalid in field declaration", object
);
7229 error ("%q+D declared as a friend", object
);
7231 && (TREE_CODE (object
) == TYPE_DECL
7232 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7233 && !TYPE_REFFN_P (TREE_TYPE (object
))
7234 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7235 error ("%q+D declared with an exception specification", object
);
7238 /* DECL is a member function or static data member and is presently
7239 being defined. Check that the definition is taking place in a
7243 check_class_member_definition_namespace (tree decl
)
7245 /* These checks only apply to member functions and static data
7247 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7248 /* We check for problems with specializations in pt.c in
7249 check_specialization_namespace, where we can issue better
7251 if (processing_specialization
)
7253 /* There are no restrictions on the placement of
7254 explicit instantiations. */
7255 if (processing_explicit_instantiation
)
7259 A member function definition that appears outside of the
7260 class definition shall appear in a namespace scope enclosing
7261 the class definition.
7265 The definition for a static data member shall appear in a
7266 namespace scope enclosing the member's class definition. */
7267 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7268 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7269 decl
, DECL_CONTEXT (decl
));
7272 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7273 METHOD_TYPE for a non-static member function; QUALS are the
7274 cv-qualifiers that apply to the function. */
7277 build_this_parm (tree type
, cp_cv_quals quals
)
7282 cp_cv_quals this_quals
;
7284 if (CLASS_TYPE_P (type
))
7287 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7288 this_type
= build_pointer_type (this_type
);
7291 this_type
= type_of_this_parm (type
);
7292 /* The `this' parameter is implicitly `const'; it cannot be
7294 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7295 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7296 parm
= build_artificial_parm (this_identifier
, qual_type
);
7297 cp_apply_type_quals_to_decl (this_quals
, parm
);
7301 /* DECL is a static member function. Complain if it was declared
7302 with function-cv-quals. */
7305 check_static_quals (tree decl
, cp_cv_quals quals
)
7307 if (quals
!= TYPE_UNQUALIFIED
)
7308 error ("static member function %q#D declared with type qualifiers",
7312 /* Helper function. Replace the temporary this parameter injected
7313 during cp_finish_omp_declare_simd with the real this parameter. */
7316 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7318 tree this_parm
= (tree
) data
;
7319 if (TREE_CODE (*tp
) == PARM_DECL
7320 && DECL_NAME (*tp
) == this_identifier
7321 && *tp
!= this_parm
)
7323 else if (TYPE_P (*tp
))
7328 /* CTYPE is class type, or null if non-class.
7329 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7331 DECLARATOR is the function's name.
7332 PARMS is a chain of PARM_DECLs for the function.
7333 VIRTUALP is truthvalue of whether the function is virtual or not.
7334 FLAGS are to be passed through to `grokclassfn'.
7335 QUALS are qualifiers indicating whether the function is `const'
7337 RAISES is a list of exceptions that this function can raise.
7338 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7339 not look, and -1 if we should not call `grokclassfn' at all.
7341 SFK is the kind of special function (if any) for the new function.
7343 Returns `NULL_TREE' if something goes wrong, after issuing
7344 applicable error messages. */
7347 grokfndecl (tree ctype
,
7351 tree orig_declarator
,
7353 enum overload_flags flags
,
7355 cp_ref_qualifier rqual
,
7361 special_function_kind sfk
,
7366 location_t location
)
7369 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7373 type
= build_ref_qualified_type (type
, rqual
);
7375 type
= build_exception_variant (type
, raises
);
7377 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7379 /* If we have an explicit location, use it, otherwise use whatever
7380 build_lang_decl used (probably input_location). */
7381 if (location
!= UNKNOWN_LOCATION
)
7382 DECL_SOURCE_LOCATION (decl
) = location
;
7384 if (TREE_CODE (type
) == METHOD_TYPE
)
7387 parm
= build_this_parm (type
, quals
);
7388 DECL_CHAIN (parm
) = parms
;
7391 DECL_ARGUMENTS (decl
) = parms
;
7392 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7393 DECL_CONTEXT (t
) = decl
;
7394 /* Propagate volatile out from type to decl. */
7395 if (TYPE_VOLATILE (type
))
7396 TREE_THIS_VOLATILE (decl
) = 1;
7398 /* Setup decl according to sfk. */
7401 case sfk_constructor
:
7402 case sfk_copy_constructor
:
7403 case sfk_move_constructor
:
7404 DECL_CONSTRUCTOR_P (decl
) = 1;
7406 case sfk_destructor
:
7407 DECL_DESTRUCTOR_P (decl
) = 1;
7413 /* If pointers to member functions use the least significant bit to
7414 indicate whether a function is virtual, ensure a pointer
7415 to this function will have that bit clear. */
7416 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7417 && TREE_CODE (type
) == METHOD_TYPE
7418 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7419 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7422 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7426 ("defining explicit specialization %qD in friend declaration",
7430 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7431 tree args
= TREE_OPERAND (orig_declarator
, 1);
7433 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7435 /* Something like `template <class T> friend void f<T>()'. */
7436 error ("invalid use of template-id %qD in declaration "
7437 "of primary template",
7443 /* A friend declaration of the form friend void f<>(). Record
7444 the information in the TEMPLATE_ID_EXPR. */
7445 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7447 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7448 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7450 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7451 if (TREE_PURPOSE (t
)
7452 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7454 error ("default arguments are not allowed in declaration "
7455 "of friend template specialization %qD",
7461 error ("%<inline%> is not allowed in declaration of friend "
7462 "template specialization %qD",
7465 error ("%<constexpr%> is not allowed in declaration of friend "
7466 "template specialization %qD",
7473 /* If this decl has namespace scope, set that up. */
7475 set_decl_namespace (decl
, in_namespace
, friendp
);
7477 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7479 /* `main' and builtins have implicit 'C' linkage. */
7480 if ((MAIN_NAME_P (declarator
)
7481 || (IDENTIFIER_LENGTH (declarator
) > 10
7482 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7483 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7484 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7485 || (targetcm
.cxx_implicit_extern_c
7486 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7487 && current_lang_name
== lang_name_cplusplus
7488 && ctype
== NULL_TREE
7489 && DECL_FILE_SCOPE_P (decl
))
7490 SET_DECL_LANGUAGE (decl
, lang_c
);
7492 /* Should probably propagate const out from type to decl I bet (mrs). */
7495 DECL_STATIC_FUNCTION_P (decl
) = 1;
7496 DECL_CONTEXT (decl
) = ctype
;
7501 DECL_CONTEXT (decl
) = ctype
;
7503 check_class_member_definition_namespace (decl
);
7506 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7508 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7509 error ("cannot declare %<::main%> to be a template");
7511 error ("cannot declare %<::main%> to be inline");
7513 error ("cannot declare %<::main%> to be constexpr");
7515 error ("cannot declare %<::main%> to be static");
7520 /* Members of anonymous types and local classes have no linkage; make
7521 them internal. If a typedef is made later, this will be changed. */
7522 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7523 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7526 if (publicp
&& cxx_dialect
== cxx98
)
7528 /* [basic.link]: A name with no linkage (notably, the name of a class
7529 or enumeration declared in a local scope) shall not be used to
7530 declare an entity with linkage.
7532 DR 757 relaxes this restriction for C++0x. */
7533 t
= no_linkage_check (TREE_TYPE (decl
),
7534 /*relaxed_p=*/false);
7537 if (TYPE_ANONYMOUS_P (t
))
7539 if (DECL_EXTERN_C_P (decl
))
7540 /* Allow this; it's pretty common in C. */;
7543 permerror (input_location
, "anonymous type with no linkage "
7544 "used to declare function %q#D with linkage",
7546 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7547 permerror (input_location
, "%q+#D does not refer to the unqualified "
7548 "type, so it is not used for linkage",
7553 permerror (input_location
, "type %qT with no linkage used to "
7554 "declare function %q#D with linkage", t
, decl
);
7558 TREE_PUBLIC (decl
) = publicp
;
7561 DECL_INTERFACE_KNOWN (decl
) = 1;
7562 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7565 /* If the declaration was declared inline, mark it as such. */
7567 DECL_DECLARED_INLINE_P (decl
) = 1;
7569 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7571 DECL_EXTERNAL (decl
) = 1;
7572 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7577 ? G_("static member function %qD cannot have cv-qualifier")
7578 : G_("non-member function %qD cannot have cv-qualifier"),
7580 quals
= TYPE_UNQUALIFIED
;
7586 ? G_("static member function %qD cannot have ref-qualifier")
7587 : G_("non-member function %qD cannot have ref-qualifier"),
7589 rqual
= REF_QUAL_NONE
;
7593 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7594 && !grok_op_properties (decl
, /*complain=*/true))
7596 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7598 bool long_long_unsigned_p
;
7600 const char *suffix
= NULL
;
7601 /* [over.literal]/6: Literal operators shall not have C linkage. */
7602 if (DECL_LANGUAGE (decl
) == lang_c
)
7604 error ("literal operator with C linkage");
7608 if (DECL_NAMESPACE_SCOPE_P (decl
))
7610 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7613 error ("%qD has invalid argument list", decl
);
7617 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7618 if (long_long_unsigned_p
)
7620 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7621 warning (0, "integer suffix %<%s%>"
7622 " shadowed by implementation", suffix
);
7624 else if (long_double_p
)
7626 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7627 warning (0, "floating point suffix %<%s%>"
7628 " shadowed by implementation", suffix
);
7633 error ("%qD must be a non-member function", decl
);
7639 /* Make the init_value nonzero so pushdecl knows this is not
7640 tentative. error_mark_node is replaced later with the BLOCK. */
7641 DECL_INITIAL (decl
) = error_mark_node
;
7643 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7644 TREE_NOTHROW (decl
) = 1;
7648 /* Adjust "omp declare simd" attributes. */
7649 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7653 for (attr
= ods
; attr
;
7654 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7656 if (TREE_CODE (type
) == METHOD_TYPE
)
7657 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7658 DECL_ARGUMENTS (decl
), NULL
);
7659 if (TREE_VALUE (attr
) != NULL_TREE
)
7661 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7662 cl
= c_omp_declare_simd_clauses_to_numbers
7663 (DECL_ARGUMENTS (decl
), cl
);
7665 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7667 TREE_VALUE (attr
) = NULL_TREE
;
7673 /* Caller will do the rest of this. */
7677 if (ctype
!= NULL_TREE
)
7678 grokclassfn (ctype
, decl
, flags
);
7681 if (cxx_dialect
>= cxx11
7682 && DECL_DESTRUCTOR_P (decl
)
7683 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7684 && !processing_template_decl
)
7685 deduce_noexcept_on_destructor (decl
);
7687 decl
= check_explicit_specialization (orig_declarator
, decl
,
7690 4 * (friendp
!= 0));
7691 if (decl
== error_mark_node
)
7694 if (DECL_STATIC_FUNCTION_P (decl
))
7695 check_static_quals (decl
, quals
);
7699 cplus_decl_attributes (&decl
, *attrlist
, 0);
7700 *attrlist
= NULL_TREE
;
7703 /* Check main's type after attributes have been applied. */
7704 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7706 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7709 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7711 error ("%<::main%> must return %<int%>");
7712 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7713 TREE_TYPE (decl
) = newtype
;
7716 check_main_parameter_types (decl
);
7719 if (ctype
!= NULL_TREE
7720 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7723 tree old_decl
= check_classfn (ctype
, decl
,
7724 (processing_template_decl
7725 > template_class_depth (ctype
))
7726 ? current_template_parms
7729 if (old_decl
== error_mark_node
)
7737 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7738 /* Because grokfndecl is always supposed to return a
7739 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7740 here. We depend on our callers to figure out that its
7741 really a template that's being returned. */
7742 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7744 if (DECL_STATIC_FUNCTION_P (old_decl
)
7745 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7747 /* Remove the `this' parm added by grokclassfn. */
7748 revert_static_member_fn (decl
);
7749 check_static_quals (decl
, quals
);
7751 if (DECL_ARTIFICIAL (old_decl
))
7753 error ("definition of implicitly-declared %qD", old_decl
);
7756 else if (DECL_DEFAULTED_FN (old_decl
))
7758 error ("definition of explicitly-defaulted %q+D", decl
);
7759 error ("%q+#D explicitly defaulted here", old_decl
);
7763 /* Since we've smashed OLD_DECL to its
7764 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7765 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7766 decl
= DECL_TEMPLATE_RESULT (decl
);
7768 /* Attempt to merge the declarations. This can fail, in
7769 the case of some invalid specialization declarations. */
7770 pushed_scope
= push_scope (ctype
);
7771 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7773 pop_scope (pushed_scope
);
7776 error ("no %q#D member function declared in class %qT",
7784 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7787 if (ctype
== NULL_TREE
|| check
)
7791 DECL_VIRTUAL_P (decl
) = 1;
7796 /* decl is a FUNCTION_DECL.
7797 specifiers are the parsed virt-specifiers.
7799 Set flags to reflect the virt-specifiers.
7804 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7806 if (decl
== NULL_TREE
)
7808 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7809 DECL_OVERRIDE_P (decl
) = 1;
7810 if (specifiers
& VIRT_SPEC_FINAL
)
7811 DECL_FINAL_P (decl
) = 1;
7815 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7816 the linkage that DECL will receive in the object file. */
7819 set_linkage_for_static_data_member (tree decl
)
7821 /* A static data member always has static storage duration and
7822 external linkage. Note that static data members are forbidden in
7823 local classes -- the only situation in which a class has
7824 non-external linkage. */
7825 TREE_PUBLIC (decl
) = 1;
7826 TREE_STATIC (decl
) = 1;
7827 /* For non-template classes, static data members are always put
7828 out in exactly those files where they are defined, just as
7829 with ordinary namespace-scope variables. */
7830 if (!processing_template_decl
)
7831 DECL_INTERFACE_KNOWN (decl
) = 1;
7834 /* Create a VAR_DECL named NAME with the indicated TYPE.
7836 If SCOPE is non-NULL, it is the class type or namespace containing
7837 the variable. If SCOPE is NULL, the variable should is created in
7838 the innermost enclosings scope. */
7841 grokvardecl (tree type
,
7843 const cp_decl_specifier_seq
*declspecs
,
7849 tree explicit_scope
;
7851 gcc_assert (!name
|| identifier_p (name
));
7853 /* Compute the scope in which to place the variable, but remember
7854 whether or not that scope was explicitly specified by the user. */
7855 explicit_scope
= scope
;
7858 /* An explicit "extern" specifier indicates a namespace-scope
7860 if (declspecs
->storage_class
== sc_extern
)
7861 scope
= current_decl_namespace ();
7862 else if (!at_function_scope_p ())
7863 scope
= current_scope ();
7867 && (/* If the variable is a namespace-scope variable declared in a
7868 template, we need DECL_LANG_SPECIFIC. */
7869 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7870 /* Similarly for namespace-scope variables with language linkage
7872 || (TREE_CODE (scope
) == NAMESPACE_DECL
7873 && current_lang_name
!= lang_name_cplusplus
)
7874 /* Similarly for static data members. */
7876 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7878 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7880 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7881 set_decl_namespace (decl
, explicit_scope
, 0);
7883 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7885 if (declspecs
->storage_class
== sc_extern
)
7887 DECL_THIS_EXTERN (decl
) = 1;
7888 DECL_EXTERNAL (decl
) = !initialized
;
7891 if (DECL_CLASS_SCOPE_P (decl
))
7893 set_linkage_for_static_data_member (decl
);
7894 /* This function is only called with out-of-class definitions. */
7895 DECL_EXTERNAL (decl
) = 0;
7896 check_class_member_definition_namespace (decl
);
7898 /* At top level, either `static' or no s.c. makes a definition
7899 (perhaps tentative), and absence of `static' makes it public. */
7900 else if (toplevel_bindings_p ())
7902 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7903 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7904 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7906 /* Not at top level, only `static' makes a static definition. */
7909 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7910 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7913 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7915 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7916 if (declspecs
->gnu_thread_keyword_p
)
7917 DECL_GNU_TLS_P (decl
) = true;
7920 /* If the type of the decl has no linkage, make sure that we'll
7921 notice that in mark_used. */
7922 if (cxx_dialect
> cxx98
7923 && decl_linkage (decl
) != lk_none
7924 && DECL_LANG_SPECIFIC (decl
) == NULL
7925 && !DECL_EXTERN_C_P (decl
)
7926 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7927 retrofit_lang_decl (decl
);
7929 if (TREE_PUBLIC (decl
))
7931 /* [basic.link]: A name with no linkage (notably, the name of a class
7932 or enumeration declared in a local scope) shall not be used to
7933 declare an entity with linkage.
7935 DR 757 relaxes this restriction for C++0x. */
7936 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7937 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7940 if (TYPE_ANONYMOUS_P (t
))
7942 if (DECL_EXTERN_C_P (decl
))
7943 /* Allow this; it's pretty common in C. */
7947 /* DRs 132, 319 and 389 seem to indicate types with
7948 no linkage can only be used to declare extern "C"
7949 entities. Since it's not always an error in the
7950 ISO C++ 90 Standard, we only issue a warning. */
7951 warning (0, "anonymous type with no linkage used to declare "
7952 "variable %q#D with linkage", decl
);
7953 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7954 warning (0, "%q+#D does not refer to the unqualified "
7955 "type, so it is not used for linkage",
7960 warning (0, "type %qT with no linkage used to declare variable "
7961 "%q#D with linkage", t
, decl
);
7965 DECL_INTERFACE_KNOWN (decl
) = 1;
7970 /* Create and return a canonical pointer to member function type, for
7971 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7974 build_ptrmemfunc_type (tree type
)
7978 tree unqualified_variant
= NULL_TREE
;
7980 if (type
== error_mark_node
)
7983 /* If a canonical type already exists for this type, use it. We use
7984 this method instead of type_hash_canon, because it only does a
7985 simple equality check on the list of field members. */
7987 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7990 /* Make sure that we always have the unqualified pointer-to-member
7992 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7994 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7996 t
= make_class_type (RECORD_TYPE
);
7997 xref_basetypes (t
, NULL_TREE
);
7999 /* Let the front end know this is a pointer to member function... */
8000 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8001 /* ... and not really a class type. */
8002 SET_CLASS_TYPE_P (t
, 0);
8004 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8007 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8009 DECL_CHAIN (field
) = fields
;
8012 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8014 /* Zap out the name so that the back end will give us the debugging
8015 information for this anonymous RECORD_TYPE. */
8016 TYPE_NAME (t
) = NULL_TREE
;
8018 /* If this is not the unqualified form of this pointer-to-member
8019 type, set the TYPE_MAIN_VARIANT for this type to be the
8020 unqualified type. Since they are actually RECORD_TYPEs that are
8021 not variants of each other, we must do this manually.
8022 As we just built a new type there is no need to do yet another copy. */
8023 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8025 int type_quals
= cp_type_quals (type
);
8026 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8027 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8028 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8029 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8030 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8031 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8032 TREE_TYPE (TYPE_BINFO (t
)) = t
;
8035 /* Cache this pointer-to-member type so that we can find it again
8037 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8039 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8040 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8041 else if (TYPE_CANONICAL (type
) != type
)
8042 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8047 /* Create and return a pointer to data member type. */
8050 build_ptrmem_type (tree class_type
, tree member_type
)
8052 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8054 cp_cv_quals quals
= type_memfn_quals (member_type
);
8055 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8056 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8057 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8061 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8062 return build_offset_type (class_type
, member_type
);
8066 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8067 Check to see that the definition is valid. Issue appropriate error
8068 messages. Return 1 if the definition is particularly bad, or 0
8072 check_static_variable_definition (tree decl
, tree type
)
8074 /* Can't check yet if we don't know the type. */
8075 if (dependent_type_p (type
))
8077 /* If DECL is declared constexpr, we'll do the appropriate checks
8078 in check_initializer. */
8079 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8081 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8083 if (!COMPLETE_TYPE_P (type
))
8084 error ("in-class initialization of static data member %q#D of "
8085 "incomplete type", decl
);
8086 else if (literal_type_p (type
))
8087 permerror (input_location
,
8088 "%<constexpr%> needed for in-class initialization of "
8089 "static data member %q#D of non-integral type", decl
);
8091 error ("in-class initialization of static data member %q#D of "
8092 "non-literal type", decl
);
8096 /* Motion 10 at San Diego: If a static const integral data member is
8097 initialized with an integral constant expression, the initializer
8098 may appear either in the declaration (within the class), or in
8099 the definition, but not both. If it appears in the class, the
8100 member is a member constant. The file-scope definition is always
8102 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8104 error ("invalid in-class initialization of static data member "
8105 "of non-integral type %qT",
8109 else if (!CP_TYPE_CONST_P (type
))
8110 error ("ISO C++ forbids in-class initialization of non-const "
8111 "static member %qD",
8113 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8114 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8115 "%qD of non-integral type %qT", decl
, type
);
8120 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8121 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8122 expressions out into temporary variables so that walk_tree doesn't
8123 step into them (c++/15764). */
8126 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8128 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8129 tree expr
= *expr_p
;
8130 if (TREE_CODE (expr
) == SAVE_EXPR
)
8132 tree op
= TREE_OPERAND (expr
, 0);
8133 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8134 if (TREE_SIDE_EFFECTS (op
))
8135 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8138 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8143 /* Entry point for the above. */
8146 stabilize_vla_size (tree size
)
8148 struct pointer_set_t
*pset
= pointer_set_create ();
8149 /* Break out any function calls into temporary variables. */
8150 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8151 pointer_set_destroy (pset
);
8154 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8155 not inside of SAVE_EXPR and fold them. */
8158 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8160 tree expr
= *expr_p
;
8161 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8163 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8165 *(bool *)data
= true;
8166 if (SIZEOF_EXPR_TYPE_P (expr
))
8167 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8168 SIZEOF_EXPR
, false);
8169 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8170 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8173 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8175 if (expr
== error_mark_node
)
8176 expr
= size_one_node
;
8183 /* Given the SIZE (i.e., number of elements) in an array, compute an
8184 appropriate index type for the array. If non-NULL, NAME is the
8185 name of the thing being declared. */
8188 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8192 tree abi_1_itype
= NULL_TREE
;
8194 if (error_operand_p (size
))
8195 return error_mark_node
;
8197 if (!type_dependent_expression_p (size
))
8199 tree type
= TREE_TYPE (size
);
8201 mark_rvalue_use (size
);
8203 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8204 && TREE_SIDE_EFFECTS (size
))
8205 /* In C++98, we mark a non-constant array bound with a magic
8206 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8209 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8211 if (CLASS_TYPE_P (type
)
8212 && CLASSTYPE_LITERAL_P (type
))
8214 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8217 if (!(complain
& tf_error
))
8218 return error_mark_node
;
8220 error ("size of array %qD has non-integral type %qT",
8223 error ("size of array has non-integral type %qT", type
);
8224 size
= integer_one_node
;
8226 if (size
== error_mark_node
)
8227 return error_mark_node
;
8228 type
= TREE_TYPE (size
);
8229 /* We didn't support this case in GCC 3.2, so don't bother
8230 trying to model it now in ABI v1. */
8231 abi_1_itype
= error_mark_node
;
8234 size
= maybe_constant_value (size
);
8235 if (!TREE_CONSTANT (size
))
8239 if (error_operand_p (size
))
8240 return error_mark_node
;
8242 /* The array bound must be an integer type. */
8243 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8245 if (!(complain
& tf_error
))
8246 return error_mark_node
;
8248 error ("size of array %qD has non-integral type %qT", name
, type
);
8250 error ("size of array has non-integral type %qT", type
);
8251 size
= integer_one_node
;
8252 type
= TREE_TYPE (size
);
8256 /* A type is dependent if it is...an array type constructed from any
8257 dependent type or whose size is specified by a constant expression
8258 that is value-dependent. */
8259 /* We can only call value_dependent_expression_p on integral constant
8260 expressions; treat non-constant expressions as dependent, too. */
8261 if (processing_template_decl
8262 && (type_dependent_expression_p (size
)
8263 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8265 /* We cannot do any checking for a SIZE that isn't known to be
8266 constant. Just build the index type and mark that it requires
8267 structural equality checks. */
8268 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8269 size
, size_one_node
));
8270 TYPE_DEPENDENT_P (itype
) = 1;
8271 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8272 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8276 if (!abi_version_at_least (2) && processing_template_decl
8277 && abi_1_itype
== NULL_TREE
)
8278 /* For abi-1, we handled all instances in templates the same way,
8279 even when they were non-dependent. This affects the manglings
8280 produced. So, we do the normal checking for non-dependent
8281 sizes, but at the end we'll return the same type that abi-1
8282 would have, but with TYPE_CANONICAL set to the "right"
8283 value that the current ABI would provide. */
8284 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8285 osize
, integer_one_node
));
8287 /* Normally, the array-bound will be a constant. */
8288 if (TREE_CODE (size
) == INTEGER_CST
)
8290 /* Check to see if the array bound overflowed. Make that an
8291 error, no matter how generous we're being. */
8292 constant_expression_error (size
);
8294 /* An array must have a positive number of elements. */
8295 if (INT_CST_LT (size
, integer_zero_node
))
8297 if (!(complain
& tf_error
))
8298 return error_mark_node
;
8300 error ("size of array %qD is negative", name
);
8302 error ("size of array is negative");
8303 size
= integer_one_node
;
8305 /* As an extension we allow zero-sized arrays. */
8306 else if (integer_zerop (size
))
8308 if (!(complain
& tf_error
))
8309 /* We must fail if performing argument deduction (as
8310 indicated by the state of complain), so that
8311 another substitution can be found. */
8312 return error_mark_node
;
8313 else if (in_system_header
)
8314 /* Allow them in system headers because glibc uses them. */;
8316 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8318 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8321 else if (TREE_CONSTANT (size
)
8322 /* We don't allow VLAs at non-function scopes, or during
8323 tentative template substitution. */
8324 || !at_function_scope_p ()
8325 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8327 if (!(complain
& tf_error
))
8328 return error_mark_node
;
8329 /* `(int) &fn' is not a valid array bound. */
8331 error ("size of array %qD is not an integral constant-expression",
8334 error ("size of array is not an integral constant-expression");
8335 size
= integer_one_node
;
8337 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8340 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8342 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8344 else if (warn_vla
> 0)
8348 "variable length array %qD is used", name
);
8351 "variable length array is used");
8354 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8355 /* A variable sized array. */
8356 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8359 HOST_WIDE_INT saved_processing_template_decl
;
8361 /* Compute the index of the largest element in the array. It is
8362 one less than the number of elements in the array. We save
8363 and restore PROCESSING_TEMPLATE_DECL so that computations in
8364 cp_build_binary_op will be appropriately folded. */
8365 saved_processing_template_decl
= processing_template_decl
;
8366 processing_template_decl
= 0;
8367 itype
= cp_build_binary_op (input_location
,
8369 cp_convert (ssizetype
, size
, complain
),
8370 cp_convert (ssizetype
, integer_one_node
,
8373 itype
= fold (itype
);
8374 processing_template_decl
= saved_processing_template_decl
;
8376 if (!TREE_CONSTANT (itype
))
8378 /* A variable sized array. */
8379 itype
= variable_size (itype
);
8381 if (TREE_CODE (itype
) != SAVE_EXPR
)
8383 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8384 they might survive till gimplification. */
8385 tree newitype
= itype
;
8387 cp_walk_tree_without_duplicates (&newitype
,
8388 fold_sizeof_expr_r
, &found
);
8390 itype
= variable_size (fold (newitype
));
8393 stabilize_vla_size (itype
);
8395 if (cxx_dialect
>= cxx1y
)
8397 /* If the VLA bound is larger than half the address space,
8398 or less than zero, throw std::bad_array_length. */
8399 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8401 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8402 throw_bad_array_length (), void_zero_node
);
8403 finish_expr_stmt (comp
);
8405 else if (flag_sanitize
& SANITIZE_VLA
)
8407 /* From C++1y onwards, we throw an exception on a negative
8408 length size of an array; see above. */
8410 /* We have to add 1 -- in the ubsan routine we generate
8411 LE_EXPR rather than LT_EXPR. */
8412 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8413 build_one_cst (TREE_TYPE (itype
)));
8414 t
= fold_build2 (COMPOUND_EXPR
, TREE_TYPE (t
),
8415 ubsan_instrument_vla (input_location
, t
), t
);
8416 finish_expr_stmt (t
);
8419 /* Make sure that there was no overflow when creating to a signed
8420 index type. (For example, on a 32-bit machine, an array with
8421 size 2^32 - 1 is too big.) */
8422 else if (TREE_CODE (itype
) == INTEGER_CST
8423 && TREE_OVERFLOW (itype
))
8425 if (!(complain
& tf_error
))
8426 return error_mark_node
;
8427 error ("overflow in array dimension");
8428 TREE_OVERFLOW (itype
) = 0;
8432 /* Create and return the appropriate index type. */
8433 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8435 tree t
= build_index_type (itype
);
8436 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8437 itype
= abi_1_itype
;
8440 itype
= build_index_type (itype
);
8442 /* If the index type were dependent, we would have returned early, so
8443 remember that it isn't. */
8444 TYPE_DEPENDENT_P (itype
) = 0;
8445 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8449 /* Returns the scope (if any) in which the entity declared by
8450 DECLARATOR will be located. If the entity was declared with an
8451 unqualified name, NULL_TREE is returned. */
8454 get_scope_of_declarator (const cp_declarator
*declarator
)
8456 while (declarator
&& declarator
->kind
!= cdk_id
)
8457 declarator
= declarator
->declarator
;
8459 /* If the declarator-id is a SCOPE_REF, the scope in which the
8460 declaration occurs is the first operand. */
8462 && declarator
->u
.id
.qualifying_scope
)
8463 return declarator
->u
.id
.qualifying_scope
;
8465 /* Otherwise, the declarator is not a qualified name; the entity will
8466 be declared in the current scope. */
8470 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8471 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8475 create_array_type_for_decl (tree name
, tree type
, tree size
)
8477 tree itype
= NULL_TREE
;
8479 /* If things have already gone awry, bail now. */
8480 if (type
== error_mark_node
|| size
== error_mark_node
)
8481 return error_mark_node
;
8483 /* 8.3.4/1: If the type of the identifier of D contains the auto
8484 type-specifier, the program is ill-formed. */
8485 if (pedantic
&& type_uses_auto (type
))
8486 pedwarn (input_location
, OPT_Wpedantic
,
8487 "declaration of %qD as array of %<auto%>", name
);
8489 /* If there are some types which cannot be array elements,
8490 issue an error-message and return. */
8491 switch (TREE_CODE (type
))
8495 error ("declaration of %qD as array of void", name
);
8497 error ("creating array of void");
8498 return error_mark_node
;
8502 error ("declaration of %qD as array of functions", name
);
8504 error ("creating array of functions");
8505 return error_mark_node
;
8507 case REFERENCE_TYPE
:
8509 error ("declaration of %qD as array of references", name
);
8511 error ("creating array of references");
8512 return error_mark_node
;
8516 error ("declaration of %qD as array of function members", name
);
8518 error ("creating array of function members");
8519 return error_mark_node
;
8527 The constant expressions that specify the bounds of the arrays
8528 can be omitted only for the first member of the sequence. */
8529 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8532 error ("declaration of %qD as multidimensional array must "
8533 "have bounds for all dimensions except the first",
8536 error ("multidimensional array must have bounds for all "
8537 "dimensions except the first");
8539 return error_mark_node
;
8542 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
8543 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8545 /* Figure out the index type for the array. */
8547 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8550 T is called the array element type; this type shall not be [...] an
8551 abstract class type. */
8552 abstract_virtuals_error (name
, type
);
8554 return build_cplus_array_type (type
, itype
);
8557 /* Check that it's OK to declare a function with the indicated TYPE.
8558 SFK indicates the kind of special function (if any) that this
8559 function is. OPTYPE is the type given in a conversion operator
8560 declaration, or the class type for a constructor/destructor.
8561 Returns the actual return type of the function; that
8562 may be different than TYPE if an error occurs, or for certain
8563 special functions. */
8566 check_special_function_return_type (special_function_kind sfk
,
8572 case sfk_constructor
:
8574 error ("return type specification for constructor invalid");
8576 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8577 type
= build_pointer_type (optype
);
8579 type
= void_type_node
;
8582 case sfk_destructor
:
8584 error ("return type specification for destructor invalid");
8585 /* We can't use the proper return type here because we run into
8586 problems with ambiguous bases and covariant returns.
8587 Java classes are left unchanged because (void *) isn't a valid
8588 Java type, and we don't want to change the Java ABI. */
8589 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8590 type
= build_pointer_type (void_type_node
);
8592 type
= void_type_node
;
8595 case sfk_conversion
:
8597 error ("return type specified for %<operator %T%>", optype
);
8608 /* A variable or data member (whose unqualified name is IDENTIFIER)
8609 has been declared with the indicated TYPE. If the TYPE is not
8610 acceptable, issue an error message and return a type to use for
8611 error-recovery purposes. */
8614 check_var_type (tree identifier
, tree type
)
8616 if (VOID_TYPE_P (type
))
8619 error ("unnamed variable or field declared void");
8620 else if (identifier_p (identifier
))
8622 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8623 error ("variable or field %qE declared void", identifier
);
8626 error ("variable or field declared void");
8627 type
= error_mark_node
;
8633 /* Functions for adjusting the visibility of a tagged type and its nested
8634 types when it gets a name for linkage purposes from a typedef. */
8636 static void bt_reset_linkage (binding_entry
, void *);
8638 reset_type_linkage (tree type
)
8640 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8641 if (CLASS_TYPE_P (type
))
8642 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8645 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8647 reset_type_linkage (b
->type
);
8650 /* Given declspecs and a declarator (abstract or otherwise), determine
8651 the name and type of the object declared and construct a DECL node
8654 DECLSPECS points to the representation of declaration-specifier
8655 sequence that precedes declarator.
8657 DECL_CONTEXT says which syntactic context this declaration is in:
8658 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8659 FUNCDEF for a function definition. Like NORMAL but a few different
8660 error messages in each case. Return value may be zero meaning
8661 this definition is too screwy to try to parse.
8662 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8663 handle member functions (which have FIELD context).
8664 Return value may be zero meaning this definition is too screwy to
8666 PARM for a parameter declaration (either within a function prototype
8667 or before a function body). Make a PARM_DECL, or return void_type_node.
8668 TPARM for a template parameter declaration.
8669 CATCHPARM for a parameter declaration before a catch clause.
8670 TYPENAME if for a typename (in a cast or sizeof).
8671 Don't make a DECL node; just return the ..._TYPE node.
8672 FIELD for a struct or union field; make a FIELD_DECL.
8673 BITFIELD for a field with specified width.
8675 INITIALIZED is as for start_decl.
8677 ATTRLIST is a pointer to the list of attributes, which may be NULL
8678 if there are none; *ATTRLIST may be modified if attributes from inside
8679 the declarator should be applied to the declaration.
8681 When this function is called, scoping variables (such as
8682 CURRENT_CLASS_TYPE) should reflect the scope in which the
8683 declaration occurs, not the scope in which the new declaration will
8684 be placed. For example, on:
8688 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8691 Returns a DECL (if a declarator is present), a TYPE (if there is no
8692 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8696 grokdeclarator (const cp_declarator
*declarator
,
8697 cp_decl_specifier_seq
*declspecs
,
8698 enum decl_context decl_context
,
8702 tree type
= NULL_TREE
;
8704 int explicit_int128
= 0;
8705 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8706 int explicit_int
= 0;
8707 int explicit_char
= 0;
8708 int defaulted_int
= 0;
8710 tree typedef_decl
= NULL_TREE
;
8711 const char *name
= NULL
;
8712 tree typedef_type
= NULL_TREE
;
8713 /* True if this declarator is a function definition. */
8714 bool funcdef_flag
= false;
8715 cp_declarator_kind innermost_code
= cdk_error
;
8718 /* See the code below that used this. */
8719 tree decl_attr
= NULL_TREE
;
8722 /* Keep track of what sort of function is being processed
8723 so that we can warn about default return values, or explicit
8724 return values which do not match prescribed defaults. */
8725 special_function_kind sfk
= sfk_none
;
8727 tree dname
= NULL_TREE
;
8728 tree ctor_return_type
= NULL_TREE
;
8729 enum overload_flags flags
= NO_SPECIAL
;
8730 /* cv-qualifiers that apply to the declarator, for a declaration of
8731 a member function. */
8732 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8733 /* virt-specifiers that apply to the declarator, for a declaration of
8734 a member function. */
8735 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8736 /* ref-qualifier that applies to the declarator, for a declaration of
8737 a member function. */
8738 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8739 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8741 tree raises
= NULL_TREE
;
8742 int template_count
= 0;
8743 tree returned_attrs
= NULL_TREE
;
8744 tree parms
= NULL_TREE
;
8745 const cp_declarator
*id_declarator
;
8746 /* The unqualified name of the declarator; either an
8747 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8748 tree unqualified_id
;
8749 /* The class type, if any, in which this entity is located,
8750 or NULL_TREE if none. Note that this value may be different from
8751 the current class type; for example if an attempt is made to declare
8752 "A::f" inside "B", this value will be "A". */
8753 tree ctype
= current_class_type
;
8754 /* The NAMESPACE_DECL for the namespace in which this entity is
8755 located. If an unqualified name is used to declare the entity,
8756 this value will be NULL_TREE, even if the entity is located at
8758 tree in_namespace
= NULL_TREE
;
8759 cp_storage_class storage_class
;
8760 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8761 bool type_was_error_mark_node
= false;
8762 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8763 bool template_type_arg
= false;
8764 bool template_parm_flag
= false;
8765 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8766 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8767 source_location saved_loc
= input_location
;
8770 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8771 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8772 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8773 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8774 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8775 explicit_int128
= declspecs
->explicit_int128_p
;
8776 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8778 if (decl_context
== FUNCDEF
)
8779 funcdef_flag
= true, decl_context
= NORMAL
;
8780 else if (decl_context
== MEMFUNCDEF
)
8781 funcdef_flag
= true, decl_context
= FIELD
;
8782 else if (decl_context
== BITFIELD
)
8783 bitfield
= 1, decl_context
= FIELD
;
8784 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8785 template_type_arg
= true, decl_context
= TYPENAME
;
8786 else if (decl_context
== TPARM
)
8787 template_parm_flag
= true, decl_context
= PARM
;
8789 if (initialized
> 1)
8790 funcdef_flag
= true;
8792 /* Look inside a declarator for the name being declared
8793 and get it as a string, for an error message. */
8794 for (id_declarator
= declarator
;
8796 id_declarator
= id_declarator
->declarator
)
8798 if (id_declarator
->kind
!= cdk_id
)
8799 innermost_code
= id_declarator
->kind
;
8801 switch (id_declarator
->kind
)
8804 if (id_declarator
->declarator
8805 && id_declarator
->declarator
->kind
== cdk_id
)
8807 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8808 if (sfk
== sfk_destructor
)
8815 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8816 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8819 if (qualifying_scope
)
8821 if (at_function_scope_p ())
8825 A declarator-id shall not be qualified except
8828 None of the cases are permitted in block
8830 if (qualifying_scope
== global_namespace
)
8831 error ("invalid use of qualified-name %<::%D%>",
8833 else if (TYPE_P (qualifying_scope
))
8834 error ("invalid use of qualified-name %<%T::%D%>",
8835 qualifying_scope
, decl
);
8837 error ("invalid use of qualified-name %<%D::%D%>",
8838 qualifying_scope
, decl
);
8839 return error_mark_node
;
8841 else if (TYPE_P (qualifying_scope
))
8843 ctype
= qualifying_scope
;
8844 if (!MAYBE_CLASS_TYPE_P (ctype
))
8846 error ("%q#T is not a class or a namespace", ctype
);
8849 else if (innermost_code
!= cdk_function
8850 && current_class_type
8851 && !uniquely_derived_from_p (ctype
,
8852 current_class_type
))
8854 error ("invalid use of qualified-name %<%T::%D%>",
8855 qualifying_scope
, decl
);
8856 return error_mark_node
;
8859 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8860 in_namespace
= qualifying_scope
;
8862 switch (TREE_CODE (decl
))
8868 if (innermost_code
!= cdk_function
)
8870 error ("declaration of %qD as non-function", decl
);
8871 return error_mark_node
;
8873 else if (!qualifying_scope
8874 && !(current_class_type
&& at_class_scope_p ()))
8876 error ("declaration of %qD as non-member", decl
);
8877 return error_mark_node
;
8880 type
= TREE_OPERAND (decl
, 0);
8882 type
= constructor_name (type
);
8883 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8888 case TEMPLATE_ID_EXPR
:
8890 tree fns
= TREE_OPERAND (decl
, 0);
8893 if (!identifier_p (dname
))
8895 gcc_assert (is_overloaded_fn (dname
));
8896 dname
= DECL_NAME (get_first_fn (dname
));
8901 case IDENTIFIER_NODE
:
8902 if (identifier_p (decl
))
8905 if (C_IS_RESERVED_WORD (dname
))
8907 error ("declarator-id missing; using reserved word %qD",
8909 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8911 else if (!IDENTIFIER_TYPENAME_P (dname
))
8912 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8915 gcc_assert (flags
== NO_SPECIAL
);
8916 flags
= TYPENAME_FLAG
;
8917 ctor_return_type
= TREE_TYPE (dname
);
8918 sfk
= sfk_conversion
;
8919 if (is_typename_at_global_scope (dname
))
8920 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8922 name
= "<invalid operator>";
8939 return error_mark_node
;
8944 if (id_declarator
->kind
== cdk_id
)
8950 The declarator in a function-definition shall have the form
8951 D1 ( parameter-declaration-clause) ... */
8952 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8954 error ("function definition does not declare parameters");
8955 return error_mark_node
;
8958 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8959 && innermost_code
!= cdk_function
8960 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8962 error ("declaration of %qD as non-function", dname
);
8963 return error_mark_node
;
8967 && identifier_p (dname
)
8968 && UDLIT_OPER_P (dname
)
8969 && innermost_code
!= cdk_function
)
8971 error ("declaration of %qD as non-function", dname
);
8972 return error_mark_node
;
8975 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8979 error ("declaration of %qD as %<typedef%>", dname
);
8980 return error_mark_node
;
8982 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8984 error ("declaration of %qD as parameter", dname
);
8985 return error_mark_node
;
8989 /* Anything declared one level down from the top level
8990 must be one of the parameters of a function
8991 (because the body is at least two levels down). */
8993 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8994 by not allowing C++ class definitions to specify their parameters
8995 with xdecls (must be spec.d in the parmlist).
8997 Since we now wait to push a class scope until we are sure that
8998 we are in a legitimate method context, we must set oldcname
8999 explicitly (since current_class_name is not yet alive).
9001 We also want to avoid calling this a PARM if it is in a namespace. */
9003 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9005 cp_binding_level
*b
= current_binding_level
;
9006 current_binding_level
= b
->level_chain
;
9007 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9008 decl_context
= PARM
;
9009 current_binding_level
= b
;
9013 name
= decl_context
== PARM
? "parameter" : "type name";
9015 if (constexpr_p
&& typedef_p
)
9017 error ("%<constexpr%> cannot appear in a typedef declaration");
9018 return error_mark_node
;
9021 /* If there were multiple types specified in the decl-specifier-seq,
9022 issue an error message. */
9023 if (declspecs
->multiple_types_p
)
9025 error ("two or more data types in declaration of %qs", name
);
9026 return error_mark_node
;
9029 if (declspecs
->conflicting_specifiers_p
)
9031 error ("conflicting specifiers in declaration of %qs", name
);
9032 return error_mark_node
;
9035 /* Extract the basic type from the decl-specifier-seq. */
9036 type
= declspecs
->type
;
9037 if (type
== error_mark_node
)
9040 type_was_error_mark_node
= true;
9042 /* If the entire declaration is itself tagged as deprecated then
9043 suppress reports of deprecated items. */
9044 if (type
&& TREE_DEPRECATED (type
)
9045 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9046 warn_deprecated_use (type
, NULL_TREE
);
9047 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9049 typedef_decl
= type
;
9050 type
= TREE_TYPE (typedef_decl
);
9051 if (TREE_DEPRECATED (type
)
9052 && DECL_ARTIFICIAL (typedef_decl
)
9053 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9054 warn_deprecated_use (type
, NULL_TREE
);
9056 /* No type at all: default to `int', and set DEFAULTED_INT
9057 because it was not a user-defined typedef. */
9058 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9060 /* These imply 'int'. */
9061 type
= integer_type_node
;
9065 explicit_int
= declspecs
->explicit_int_p
;
9066 explicit_char
= declspecs
->explicit_char_p
;
9069 /* See the code below that used this. */
9071 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9073 typedef_type
= type
;
9076 if (sfk
!= sfk_conversion
)
9077 ctor_return_type
= ctype
;
9079 if (sfk
!= sfk_none
)
9080 type
= check_special_function_return_type (sfk
, type
,
9082 else if (type
== NULL_TREE
)
9088 /* We handle `main' specially here, because 'main () { }' is so
9089 common. With no options, it is allowed. With -Wreturn-type,
9090 it is a warning. It is only an error with -pedantic-errors. */
9091 is_main
= (funcdef_flag
9092 && dname
&& identifier_p (dname
)
9093 && MAIN_NAME_P (dname
)
9094 && ctype
== NULL_TREE
9095 && in_namespace
== NULL_TREE
9096 && current_namespace
== global_namespace
);
9098 if (type_was_error_mark_node
)
9099 /* We've already issued an error, don't complain more. */;
9100 else if (in_system_header
|| flag_ms_extensions
)
9101 /* Allow it, sigh. */;
9103 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9105 pedwarn (input_location
, OPT_Wpedantic
,
9106 "ISO C++ forbids declaration of %qs with no type", name
);
9108 warning (OPT_Wreturn_type
,
9109 "ISO C++ forbids declaration of %qs with no type", name
);
9111 type
= integer_type_node
;
9116 if (explicit_int128
)
9118 if (int128_integer_type_node
== NULL_TREE
)
9120 error ("%<__int128%> is not supported by this target");
9121 explicit_int128
= false;
9123 else if (pedantic
&& ! in_system_header
)
9124 pedwarn (input_location
, OPT_Wpedantic
,
9125 "ISO C++ does not support %<__int128%> for %qs", name
);
9128 /* Now process the modifiers that were specified
9129 and check for invalid combinations. */
9131 /* Long double is a special combination. */
9132 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9135 type
= cp_build_qualified_type (long_double_type_node
,
9136 cp_type_quals (type
));
9139 /* Check all other uses of type modifiers. */
9141 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9145 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9146 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9147 else if (signed_p
&& unsigned_p
)
9148 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9149 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9150 error ("%<long long%> invalid for %qs", name
);
9151 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9152 error ("%<long%> invalid for %qs", name
);
9153 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9154 error ("%<short%> invalid for %qs", name
);
9155 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9156 error ("%<long%> or %<short%> invalid for %qs", name
);
9157 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9158 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9159 else if ((long_p
|| short_p
) && explicit_char
)
9160 error ("%<long%> or %<short%> specified with char for %qs", name
);
9161 else if (long_p
&& short_p
)
9162 error ("%<long%> and %<short%> specified together for %qs", name
);
9163 else if (type
== char16_type_node
|| type
== char32_type_node
)
9165 if (signed_p
|| unsigned_p
)
9166 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9167 else if (short_p
|| long_p
)
9168 error ("%<short%> or %<long%> invalid for %qs", name
);
9173 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9175 pedwarn (input_location
, OPT_Wpedantic
,
9176 "long, short, signed or unsigned used invalidly for %qs",
9178 if (flag_pedantic_errors
)
9183 /* Discard the type modifiers if they are invalid. */
9194 /* Decide whether an integer type is signed or not.
9195 Optionally treat bitfields as signed by default. */
9199 It is implementation-defined whether a plain (neither
9200 explicitly signed or unsigned) char, short, int, or long
9201 bit-field is signed or unsigned.
9203 Naturally, we extend this to long long as well. Note that
9204 this does not include wchar_t. */
9205 || (bitfield
&& !flag_signed_bitfields
9207 /* A typedef for plain `int' without `signed' can be
9208 controlled just like plain `int', but a typedef for
9209 `signed int' cannot be so controlled. */
9211 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9212 && TREE_CODE (type
) == INTEGER_TYPE
9213 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9215 if (explicit_int128
)
9216 type
= int128_unsigned_type_node
;
9218 type
= long_long_unsigned_type_node
;
9220 type
= long_unsigned_type_node
;
9222 type
= short_unsigned_type_node
;
9223 else if (type
== char_type_node
)
9224 type
= unsigned_char_type_node
;
9225 else if (typedef_decl
)
9226 type
= unsigned_type_for (type
);
9228 type
= unsigned_type_node
;
9230 else if (signed_p
&& type
== char_type_node
)
9231 type
= signed_char_type_node
;
9232 else if (explicit_int128
)
9233 type
= int128_integer_type_node
;
9235 type
= long_long_integer_type_node
;
9237 type
= long_integer_type_node
;
9239 type
= short_integer_type_node
;
9241 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9243 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9244 error ("complex invalid for %qs", name
);
9245 /* If we just have "complex", it is equivalent to
9246 "complex double", but if any modifiers at all are specified it is
9247 the complex form of TYPE. E.g, "complex short" is
9248 "complex short int". */
9249 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9250 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9251 type
= complex_double_type_node
;
9252 else if (type
== integer_type_node
)
9253 type
= complex_integer_type_node
;
9254 else if (type
== float_type_node
)
9255 type
= complex_float_type_node
;
9256 else if (type
== double_type_node
)
9257 type
= complex_double_type_node
;
9258 else if (type
== long_double_type_node
)
9259 type
= complex_long_double_type_node
;
9261 type
= build_complex_type (type
);
9264 type_quals
= TYPE_UNQUALIFIED
;
9265 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9266 type_quals
|= TYPE_QUAL_CONST
;
9267 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9268 type_quals
|= TYPE_QUAL_VOLATILE
;
9269 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9270 type_quals
|= TYPE_QUAL_RESTRICT
;
9271 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9272 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9275 /* If we're using the injected-class-name to form a compound type or a
9276 declaration, replace it with the underlying class so we don't get
9277 redundant typedefs in the debug output. But if we are returning the
9278 type unchanged, leave it alone so that it's available to
9279 maybe_get_template_decl_from_type_decl. */
9280 if (CLASS_TYPE_P (type
)
9281 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9282 && type
== TREE_TYPE (TYPE_NAME (type
))
9283 && (declarator
|| type_quals
))
9284 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9286 type_quals
|= cp_type_quals (type
);
9287 type
= cp_build_qualified_type_real
9288 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9289 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9290 /* We might have ignored or rejected some of the qualifiers. */
9291 type_quals
= cp_type_quals (type
);
9294 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9295 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9296 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9298 storage_class
= declspecs
->storage_class
;
9299 if (storage_class
== sc_static
)
9300 staticp
= 1 + (decl_context
== FIELD
);
9302 if (virtualp
&& staticp
== 2)
9304 error ("member %qD cannot be declared both virtual and static", dname
);
9305 storage_class
= sc_none
;
9308 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9310 /* Issue errors about use of storage classes for parameters. */
9311 if (decl_context
== PARM
)
9315 error ("typedef declaration invalid in parameter declaration");
9316 return error_mark_node
;
9318 else if (template_parm_flag
&& storage_class
!= sc_none
)
9320 error ("storage class specified for template parameter %qs", name
);
9321 return error_mark_node
;
9323 else if (storage_class
== sc_static
9324 || storage_class
== sc_extern
9326 error ("storage class specifiers invalid in parameter declarations");
9328 /* Function parameters cannot be constexpr. If we saw one, moan
9329 and pretend it wasn't there. */
9332 error ("a parameter cannot be declared %<constexpr%>");
9337 /* Give error if `virtual' is used outside of class declaration. */
9339 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9341 error ("%<virtual%> outside class declaration");
9345 /* Static anonymous unions are dealt with here. */
9346 if (staticp
&& decl_context
== TYPENAME
9348 && ANON_AGGR_TYPE_P (declspecs
->type
))
9349 decl_context
= FIELD
;
9351 /* Warn about storage classes that are invalid for certain
9352 kinds of declarations (parameters, typenames, etc.). */
9355 && storage_class
!= sc_extern
9356 && storage_class
!= sc_static
)
9359 error ("multiple storage classes in declaration of %qs", name
);
9362 if (decl_context
!= NORMAL
9363 && ((storage_class
!= sc_none
9364 && storage_class
!= sc_mutable
)
9367 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9368 && (storage_class
== sc_register
9369 || storage_class
== sc_auto
))
9373 else if (decl_context
== FIELD
9374 /* C++ allows static class elements. */
9375 && storage_class
== sc_static
)
9376 /* C++ also allows inlines and signed and unsigned elements,
9377 but in those cases we don't come in here. */
9381 if (decl_context
== FIELD
)
9382 error ("storage class specified for %qs", name
);
9385 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9386 error ("storage class specified for parameter %qs", name
);
9388 error ("storage class specified for typename");
9390 if (storage_class
== sc_register
9391 || storage_class
== sc_auto
9392 || storage_class
== sc_extern
9394 storage_class
= sc_none
;
9397 else if (storage_class
== sc_extern
&& funcdef_flag
9398 && ! toplevel_bindings_p ())
9399 error ("nested function %qs declared %<extern%>", name
);
9400 else if (toplevel_bindings_p ())
9402 if (storage_class
== sc_auto
)
9403 error ("top-level declaration of %qs specifies %<auto%>", name
);
9406 && storage_class
!= sc_extern
9407 && storage_class
!= sc_static
)
9409 if (declspecs
->gnu_thread_keyword_p
)
9410 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9411 "declared %<__thread%>", name
);
9413 /* When thread_local is applied to a variable of block scope the
9414 storage-class-specifier static is implied if it does not appear
9416 storage_class
= declspecs
->storage_class
= sc_static
;
9420 if (storage_class
&& friendp
)
9422 error ("storage class specifiers invalid in friend function declarations");
9423 storage_class
= sc_none
;
9428 unqualified_id
= NULL_TREE
;
9431 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9432 switch (TREE_CODE (unqualified_id
))
9435 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9436 if (TYPE_P (unqualified_id
))
9437 unqualified_id
= constructor_name (unqualified_id
);
9440 case IDENTIFIER_NODE
:
9441 case TEMPLATE_ID_EXPR
:
9449 if (declspecs
->std_attributes
)
9451 /* Apply the c++11 attributes to the type preceding them. */
9452 input_location
= declspecs
->locations
[ds_std_attribute
];
9453 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9454 input_location
= saved_loc
;
9457 /* Determine the type of the entity declared by recurring on the
9459 for (; declarator
; declarator
= declarator
->declarator
)
9461 const cp_declarator
*inner_declarator
;
9464 if (type
== error_mark_node
)
9465 return error_mark_node
;
9467 attrs
= declarator
->attributes
;
9473 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9474 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9475 if (declarator
->kind
== cdk_function
)
9476 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9477 if (declarator
->kind
== cdk_array
)
9478 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9479 returned_attrs
= decl_attributes (&type
,
9480 chainon (returned_attrs
, attrs
),
9484 if (declarator
->kind
== cdk_id
)
9487 inner_declarator
= declarator
->declarator
;
9489 switch (declarator
->kind
)
9492 type
= create_array_type_for_decl (dname
, type
,
9493 declarator
->u
.array
.bounds
);
9494 if (declarator
->std_attributes
)
9497 The optional attribute-specifier-seq appertains to the
9499 returned_attrs
= chainon (returned_attrs
,
9500 declarator
->std_attributes
);
9508 /* Declaring a function type.
9509 Make sure we have a valid type for the function to return. */
9511 if (type_quals
!= TYPE_UNQUALIFIED
)
9513 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9514 warning (OPT_Wignored_qualifiers
,
9515 "type qualifiers ignored on function return type");
9516 /* We now know that the TYPE_QUALS don't apply to the
9517 decl, but to its return type. */
9518 type_quals
= TYPE_UNQUALIFIED
;
9520 errmsg
= targetm
.invalid_return_type (type
);
9524 type
= integer_type_node
;
9527 /* Error about some types functions can't return. */
9529 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9531 error ("%qs declared as function returning a function", name
);
9532 return error_mark_node
;
9534 if (TREE_CODE (type
) == ARRAY_TYPE
)
9536 error ("%qs declared as function returning an array", name
);
9537 return error_mark_node
;
9540 input_location
= declspecs
->locations
[ds_type_spec
];
9541 abstract_virtuals_error (ACU_RETURN
, type
);
9542 input_location
= saved_loc
;
9544 /* Pick up type qualifiers which should be applied to `this'. */
9545 memfn_quals
= declarator
->u
.function
.qualifiers
;
9546 /* Pick up virt-specifiers. */
9547 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9548 /* And ref-qualifier, too */
9549 rqual
= declarator
->u
.function
.ref_qualifier
;
9550 /* Pick up the exception specifications. */
9551 raises
= declarator
->u
.function
.exception_specification
;
9552 /* If the exception-specification is ill-formed, let's pretend
9553 there wasn't one. */
9554 if (raises
== error_mark_node
)
9557 /* Say it's a definition only for the CALL_EXPR
9558 closest to the identifier. */
9559 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9561 /* Handle a late-specified return type. */
9564 if (type_uses_auto (type
))
9566 if (!declarator
->u
.function
.late_return_type
)
9568 if (current_class_type
9569 && LAMBDA_TYPE_P (current_class_type
))
9570 /* OK for C++11 lambdas. */;
9571 else if (cxx_dialect
< cxx1y
)
9572 pedwarn (input_location
, 0, "%qs function uses "
9573 "%<auto%> type specifier without trailing "
9574 "return type", name
);
9576 permerror (input_location
, "virtual function cannot "
9577 "have deduced return type");
9579 else if (!is_auto (type
))
9581 error ("%qs function with trailing return type has"
9582 " %qT as its type rather than plain %<auto%>",
9584 return error_mark_node
;
9587 else if (declarator
->u
.function
.late_return_type
)
9589 if (cxx_dialect
< cxx11
)
9590 /* Not using maybe_warn_cpp0x because this should
9591 always be an error. */
9592 error ("trailing return type only available with "
9593 "-std=c++11 or -std=gnu++11");
9595 error ("%qs function with trailing return type not "
9596 "declared with %<auto%> type specifier", name
);
9597 return error_mark_node
;
9600 type
= splice_late_return_type
9601 (type
, declarator
->u
.function
.late_return_type
);
9602 if (type
== error_mark_node
)
9603 return error_mark_node
;
9605 if (ctype
== NULL_TREE
9606 && decl_context
== FIELD
9608 && (friendp
== 0 || dname
== current_class_name
))
9609 ctype
= current_class_type
;
9611 if (ctype
&& (sfk
== sfk_constructor
9612 || sfk
== sfk_destructor
))
9614 /* We are within a class's scope. If our declarator name
9615 is the same as the class name, and we are defining
9616 a function, then it is a constructor/destructor, and
9617 therefore returns a void type. */
9619 /* ISO C++ 12.4/2. A destructor may not be declared
9620 const or volatile. A destructor may not be static.
9621 A destructor may not be declared with ref-qualifier.
9623 ISO C++ 12.1. A constructor may not be declared
9624 const or volatile. A constructor may not be
9625 virtual. A constructor may not be static.
9626 A constructor may not be declared with ref-qualifier. */
9628 error ((flags
== DTOR_FLAG
)
9629 ? G_("destructor cannot be static member function")
9630 : G_("constructor cannot be static member function"));
9633 error ((flags
== DTOR_FLAG
)
9634 ? G_("destructors may not be cv-qualified")
9635 : G_("constructors may not be cv-qualified"));
9636 memfn_quals
= TYPE_UNQUALIFIED
;
9641 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9642 error ((flags
== DTOR_FLAG
)
9643 ? "destructors may not be ref-qualified"
9644 : "constructors may not be ref-qualified");
9645 rqual
= REF_QUAL_NONE
;
9648 if (decl_context
== FIELD
9649 && !member_function_or_else (ctype
,
9652 return error_mark_node
;
9654 if (flags
!= DTOR_FLAG
)
9656 /* It's a constructor. */
9661 permerror (input_location
, "constructors cannot be declared virtual");
9664 if (decl_context
== FIELD
9665 && sfk
!= sfk_constructor
)
9666 return error_mark_node
;
9668 if (decl_context
== FIELD
)
9674 error ("can%'t initialize friend function %qs", name
);
9677 /* Cannot be both friend and virtual. */
9678 error ("virtual functions cannot be friends");
9681 if (decl_context
== NORMAL
)
9682 error ("friend declaration not in class definition");
9683 if (current_function_decl
&& funcdef_flag
)
9684 error ("can%'t define friend function %qs in a local "
9688 else if (ctype
&& sfk
== sfk_conversion
)
9692 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9697 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9700 if (inner_declarator
9701 && inner_declarator
->kind
== cdk_id
9702 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9703 && arg_types
!= void_list_node
)
9705 error ("destructors may not have parameters");
9706 arg_types
= void_list_node
;
9710 type
= build_function_type (type
, arg_types
);
9711 if (declarator
->std_attributes
)
9714 The optional attribute-specifier-seq appertains to
9715 the function type. */
9716 decl_attributes (&type
, declarator
->std_attributes
,
9724 /* Filter out pointers-to-references and references-to-references.
9725 We can get these if a TYPE_DECL is used. */
9727 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9729 if (declarator
->kind
!= cdk_reference
)
9731 error ("cannot declare pointer to %q#T", type
);
9732 type
= TREE_TYPE (type
);
9735 /* In C++0x, we allow reference to reference declarations
9736 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9737 and template type arguments [14.3.1/4 temp.arg.type]. The
9738 check for direct reference to reference declarations, which
9739 are still forbidden, occurs below. Reasoning behind the change
9740 can be found in DR106, DR540, and the rvalue reference
9742 else if (cxx_dialect
== cxx98
)
9744 error ("cannot declare reference to %q#T", type
);
9745 type
= TREE_TYPE (type
);
9748 else if (VOID_TYPE_P (type
))
9750 if (declarator
->kind
== cdk_reference
)
9751 error ("cannot declare reference to %q#T", type
);
9752 else if (declarator
->kind
== cdk_ptrmem
)
9753 error ("cannot declare pointer to %q#T member", type
);
9756 /* We now know that the TYPE_QUALS don't apply to the decl,
9757 but to the target of the pointer. */
9758 type_quals
= TYPE_UNQUALIFIED
;
9760 /* This code used to handle METHOD_TYPE, but I don't think it's
9761 possible to get it here anymore. */
9762 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9763 if (declarator
->kind
== cdk_ptrmem
9764 && TREE_CODE (type
) == FUNCTION_TYPE
)
9766 memfn_quals
|= type_memfn_quals (type
);
9767 type
= build_memfn_type (type
,
9768 declarator
->u
.pointer
.class_type
,
9771 if (type
== error_mark_node
)
9772 return error_mark_node
;
9774 rqual
= REF_QUAL_NONE
;
9775 memfn_quals
= TYPE_UNQUALIFIED
;
9778 if (TREE_CODE (type
) == FUNCTION_TYPE
9779 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9780 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9781 error (declarator
->kind
== cdk_reference
9782 ? G_("cannot declare reference to qualified function type %qT")
9783 : G_("cannot declare pointer to qualified function type %qT"),
9786 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
9787 pedwarn (input_location
, OPT_Wvla
,
9788 declarator
->kind
== cdk_reference
9789 ? G_("reference to array of runtime bound")
9790 : G_("pointer to array of runtime bound"));
9792 /* When the pointed-to type involves components of variable size,
9793 care must be taken to ensure that the size evaluation code is
9794 emitted early enough to dominate all the possible later uses
9795 and late enough for the variables on which it depends to have
9798 This is expected to happen automatically when the pointed-to
9799 type has a name/declaration of it's own, but special attention
9800 is required if the type is anonymous.
9802 We handle the NORMAL and FIELD contexts here by inserting a
9803 dummy statement that just evaluates the size at a safe point
9804 and ensures it is not deferred until e.g. within a deeper
9805 conditional context (c++/43555).
9807 We expect nothing to be needed here for PARM or TYPENAME.
9808 Evaluating the size at this point for TYPENAME would
9809 actually be incorrect, as we might be in the middle of an
9810 expression with side effects on the pointed-to type size
9811 "arguments" prior to the pointer declaration point and the
9812 size evaluation could end up prior to the side effects. */
9814 if (!TYPE_NAME (type
)
9815 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9816 && at_function_scope_p ()
9817 && variably_modified_type_p (type
, NULL_TREE
))
9818 /* Force evaluation of the SAVE_EXPR. */
9819 finish_expr_stmt (TYPE_SIZE (type
));
9821 if (declarator
->kind
== cdk_reference
)
9823 /* In C++0x, the type we are creating a reference to might be
9824 a typedef which is itself a reference type. In that case,
9825 we follow the reference collapsing rules in
9826 [7.1.3/8 dcl.typedef] to create the final reference type:
9828 "If a typedef TD names a type that is a reference to a type
9829 T, an attempt to create the type 'lvalue reference to cv TD'
9830 creates the type 'lvalue reference to T,' while an attempt
9831 to create the type "rvalue reference to cv TD' creates the
9834 if (VOID_TYPE_P (type
))
9835 /* We already gave an error. */;
9836 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9838 if (declarator
->u
.reference
.rvalue_ref
)
9839 /* Leave type alone. */;
9841 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9844 type
= cp_build_reference_type
9845 (type
, declarator
->u
.reference
.rvalue_ref
);
9847 /* In C++0x, we need this check for direct reference to
9848 reference declarations, which are forbidden by
9849 [8.3.2/5 dcl.ref]. Reference to reference declarations
9850 are only allowed indirectly through typedefs and template
9851 type arguments. Example:
9853 void foo(int & &); // invalid ref-to-ref decl
9855 typedef int & int_ref;
9856 void foo(int_ref &); // valid ref-to-ref decl
9858 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9859 error ("cannot declare reference to %q#T, which is not "
9860 "a typedef or a template type argument", type
);
9862 else if (TREE_CODE (type
) == METHOD_TYPE
)
9863 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9864 else if (declarator
->kind
== cdk_ptrmem
)
9866 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9868 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9869 /* We will already have complained. */
9870 type
= error_mark_node
;
9872 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9876 type
= build_pointer_type (type
);
9878 /* Process a list of type modifier keywords (such as
9879 const or volatile) that were given inside the `*' or `&'. */
9881 if (declarator
->u
.pointer
.qualifiers
)
9884 = cp_build_qualified_type (type
,
9885 declarator
->u
.pointer
.qualifiers
);
9886 type_quals
= cp_type_quals (type
);
9889 /* Apply C++11 attributes to the pointer, and not to the
9890 type pointed to. This is unlike what is done for GNU
9891 attributes above. It is to comply with [dcl.ptr]/1:
9893 [the optional attribute-specifier-seq (7.6.1) appertains
9894 to the pointer and not to the object pointed to]. */
9895 if (declarator
->std_attributes
)
9896 decl_attributes (&type
, declarator
->std_attributes
,
9910 /* A `constexpr' specifier used in an object declaration declares
9911 the object as `const'. */
9912 if (constexpr_p
&& innermost_code
!= cdk_function
)
9914 if (type_quals
& TYPE_QUAL_VOLATILE
)
9915 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9916 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9918 type_quals
|= TYPE_QUAL_CONST
;
9919 type
= cp_build_qualified_type (type
, type_quals
);
9923 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9924 && TREE_CODE (type
) != FUNCTION_TYPE
9925 && TREE_CODE (type
) != METHOD_TYPE
)
9927 error ("template-id %qD used as a declarator",
9929 unqualified_id
= dname
;
9932 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9933 qualified with a class-name, turn it into a METHOD_TYPE, unless
9934 we know that the function is static. We take advantage of this
9935 opportunity to do other processing that pertains to entities
9936 explicitly declared to be class members. Note that if DECLARATOR
9937 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9938 would not have exited the loop above. */
9940 && declarator
->u
.id
.qualifying_scope
9941 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9943 ctype
= declarator
->u
.id
.qualifying_scope
;
9944 ctype
= TYPE_MAIN_VARIANT (ctype
);
9945 template_count
= num_template_headers_for_class (ctype
);
9947 if (ctype
== current_class_type
)
9951 permerror (input_location
, "member functions are implicitly friends of their class");
9955 permerror (declarator
->id_loc
,
9956 "extra qualification %<%T::%> on member %qs",
9959 else if (/* If the qualifying type is already complete, then we
9960 can skip the following checks. */
9961 !COMPLETE_TYPE_P (ctype
)
9962 && (/* If the function is being defined, then
9963 qualifying type must certainly be complete. */
9965 /* A friend declaration of "T::f" is OK, even if
9966 "T" is a template parameter. But, if this
9967 function is not a friend, the qualifying type
9969 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9970 /* For a declaration, the type need not be
9971 complete, if either it is dependent (since there
9972 is no meaningful definition of complete in that
9973 case) or the qualifying class is currently being
9975 || !(dependent_type_p (ctype
)
9976 || currently_open_class (ctype
)))
9977 /* Check that the qualifying type is complete. */
9978 && !complete_type_or_else (ctype
, NULL_TREE
))
9979 return error_mark_node
;
9980 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9982 if (current_class_type
9983 && (!friendp
|| funcdef_flag
))
9986 ? G_("cannot define member function %<%T::%s%> "
9988 : G_("cannot declare member function %<%T::%s%> "
9990 ctype
, name
, current_class_type
);
9991 return error_mark_node
;
9994 else if (typedef_p
&& current_class_type
)
9996 error ("cannot declare member %<%T::%s%> within %qT",
9997 ctype
, name
, current_class_type
);
9998 return error_mark_node
;
10002 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10003 ctype
= current_class_type
;
10005 /* Now TYPE has the actual type. */
10007 if (returned_attrs
)
10010 *attrlist
= chainon (returned_attrs
, *attrlist
);
10012 attrlist
= &returned_attrs
;
10016 && declarator
->kind
== cdk_id
10017 && declarator
->std_attributes
)
10018 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10019 a declarator-id appertains to the entity that is declared. */
10020 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10022 /* Handle parameter packs. */
10023 if (parameter_pack_p
)
10025 if (decl_context
== PARM
)
10026 /* Turn the type into a pack expansion.*/
10027 type
= make_pack_expansion (type
);
10029 error ("non-parameter %qs cannot be a parameter pack", name
);
10032 /* Did array size calculations overflow or does the array cover more
10033 than half of the address-space? */
10034 if (TREE_CODE (type
) == ARRAY_TYPE
10035 && COMPLETE_TYPE_P (type
)
10036 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10037 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10039 error ("size of array %qs is too large", name
);
10040 /* If we proceed with the array type as it is, we'll eventually
10041 crash in tree_to_[su]hwi(). */
10042 type
= error_mark_node
;
10045 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10046 && !processing_template_decl
10047 && variably_modified_type_p (type
, NULL_TREE
))
10049 if (decl_context
== FIELD
)
10050 error ("data member may not have variably modified type %qT", type
);
10052 error ("parameter may not have variably modified type %qT", type
);
10053 type
= error_mark_node
;
10056 if (explicitp
== 1 || (explicitp
&& friendp
))
10058 /* [dcl.fct.spec] The explicit specifier shall only be used in
10059 declarations of constructors within a class definition. */
10060 error ("only declarations of constructors can be %<explicit%>");
10064 if (storage_class
== sc_mutable
)
10066 if (decl_context
!= FIELD
|| friendp
)
10068 error ("non-member %qs cannot be declared %<mutable%>", name
);
10069 storage_class
= sc_none
;
10071 else if (decl_context
== TYPENAME
|| typedef_p
)
10073 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10074 storage_class
= sc_none
;
10076 else if (TREE_CODE (type
) == FUNCTION_TYPE
10077 || TREE_CODE (type
) == METHOD_TYPE
)
10079 error ("function %qs cannot be declared %<mutable%>", name
);
10080 storage_class
= sc_none
;
10084 error ("static %qs cannot be declared %<mutable%>", name
);
10085 storage_class
= sc_none
;
10087 else if (type_quals
& TYPE_QUAL_CONST
)
10089 error ("const %qs cannot be declared %<mutable%>", name
);
10090 storage_class
= sc_none
;
10092 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10094 permerror (input_location
, "reference %qs cannot be declared "
10095 "%<mutable%>", name
);
10096 storage_class
= sc_none
;
10100 /* If this is declaring a typedef name, return a TYPE_DECL. */
10101 if (typedef_p
&& decl_context
!= TYPENAME
)
10105 /* Note that the grammar rejects storage classes
10106 in typenames, fields or parameters. */
10107 if (current_lang_name
== lang_name_java
)
10108 TYPE_FOR_JAVA (type
) = 1;
10110 /* This declaration:
10112 typedef void f(int) const;
10114 declares a function type which is not a member of any
10115 particular class, but which is cv-qualified; for
10116 example "f S::*" declares a pointer to a const-qualified
10117 member function of S. We record the cv-qualification in the
10119 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10121 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10123 /* We have now dealt with these qualifiers. */
10124 memfn_quals
= TYPE_UNQUALIFIED
;
10125 rqual
= REF_QUAL_NONE
;
10128 if (type_uses_auto (type
))
10130 error ("typedef declared %<auto%>");
10131 type
= error_mark_node
;
10134 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
10135 pedwarn (input_location
, OPT_Wvla
,
10136 "typedef naming array of runtime bound");
10138 if (decl_context
== FIELD
)
10139 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10141 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10142 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10143 error_at (DECL_SOURCE_LOCATION (decl
),
10144 "typedef name may not be a nested-name-specifier");
10145 TREE_TYPE (decl
) = error_mark_node
;
10148 if (decl_context
!= FIELD
)
10150 if (!current_function_decl
)
10151 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10152 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10153 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10154 (current_function_decl
)))
10155 /* The TYPE_DECL is "abstract" because there will be
10156 clones of this constructor/destructor, and there will
10157 be copies of this TYPE_DECL generated in those
10159 DECL_ABSTRACT (decl
) = 1;
10161 else if (current_class_type
10162 && constructor_name_p (unqualified_id
, current_class_type
))
10163 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10164 "as enclosing class",
10167 /* If the user declares "typedef struct {...} foo" then the
10168 struct will have an anonymous name. Fill that name in now.
10169 Nothing can refer to it, so nothing needs know about the name
10171 if (type
!= error_mark_node
10173 && TYPE_NAME (type
)
10174 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10175 && TYPE_ANONYMOUS_P (type
)
10176 && declspecs
->type_definition_p
10177 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10181 /* Replace the anonymous name with the real name everywhere. */
10182 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10184 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10185 /* We do not rename the debug info representing the
10186 anonymous tagged type because the standard says in
10187 [dcl.typedef] that the naming applies only for
10188 linkage purposes. */
10189 /*debug_hooks->set_name (t, decl);*/
10190 TYPE_NAME (t
) = decl
;
10193 if (TYPE_LANG_SPECIFIC (type
))
10194 TYPE_WAS_ANONYMOUS (type
) = 1;
10196 /* If this is a typedef within a template class, the nested
10197 type is a (non-primary) template. The name for the
10198 template needs updating as well. */
10199 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10200 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10201 = TYPE_IDENTIFIER (type
);
10203 /* Adjust linkage now that we aren't anonymous anymore. */
10204 reset_type_linkage (type
);
10206 /* FIXME remangle member functions; member functions of a
10207 type with external linkage have external linkage. */
10211 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10212 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10214 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10215 memfn_quals
!= TYPE_UNQUALIFIED
,
10216 inlinep
, friendp
, raises
!= NULL_TREE
);
10218 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10219 /* Acknowledge that this was written:
10220 `using analias = atype;'. */
10221 TYPE_DECL_ALIAS_P (decl
) = 1;
10226 /* Detect the case of an array type of unspecified size
10227 which came, as such, direct from a typedef name.
10228 We must copy the type, so that the array's domain can be
10229 individually set by the object's initializer. */
10231 if (type
&& typedef_type
10232 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10233 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10234 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10236 /* Detect where we're using a typedef of function type to declare a
10237 function. PARMS will not be set, so we must create it now. */
10239 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10241 tree decls
= NULL_TREE
;
10244 for (args
= TYPE_ARG_TYPES (type
);
10245 args
&& args
!= void_list_node
;
10246 args
= TREE_CHAIN (args
))
10248 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10250 DECL_CHAIN (decl
) = decls
;
10254 parms
= nreverse (decls
);
10256 if (decl_context
!= TYPENAME
)
10258 /* A cv-qualifier-seq shall only be part of the function type
10259 for a non-static member function. A ref-qualifier shall only
10260 .... /same as above/ [dcl.fct] */
10261 if ((type_memfn_quals (type
) != TYPE_UNQUALIFIED
10262 || type_memfn_rqual (type
) != REF_QUAL_NONE
)
10263 && (current_class_type
== NULL_TREE
|| staticp
) )
10266 ? G_("qualified function types cannot be used to "
10267 "declare static member functions")
10268 : G_("qualified function types cannot be used to "
10269 "declare free functions"));
10270 type
= TYPE_MAIN_VARIANT (type
);
10273 /* The qualifiers on the function type become the qualifiers on
10274 the non-static member function. */
10275 memfn_quals
|= type_memfn_quals (type
);
10276 rqual
= type_memfn_rqual (type
);
10277 type_quals
= TYPE_UNQUALIFIED
;
10281 /* If this is a type name (such as, in a cast or sizeof),
10282 compute the type and return it now. */
10284 if (decl_context
== TYPENAME
)
10286 /* Note that the grammar rejects storage classes
10287 in typenames, fields or parameters. */
10288 if (type_quals
!= TYPE_UNQUALIFIED
)
10289 type_quals
= TYPE_UNQUALIFIED
;
10291 /* Special case: "friend class foo" looks like a TYPENAME context. */
10294 if (type_quals
!= TYPE_UNQUALIFIED
)
10296 error ("type qualifiers specified for friend class declaration");
10297 type_quals
= TYPE_UNQUALIFIED
;
10301 error ("%<inline%> specified for friend class declaration");
10307 /* Don't allow friend declaration without a class-key. */
10308 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10309 permerror (input_location
, "template parameters cannot be friends");
10310 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10311 permerror (input_location
, "friend declaration requires class-key, "
10312 "i.e. %<friend class %T::%D%>",
10313 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10315 permerror (input_location
, "friend declaration requires class-key, "
10316 "i.e. %<friend %#T%>",
10320 /* Only try to do this stuff if we didn't already give up. */
10321 if (type
!= integer_type_node
)
10323 /* A friendly class? */
10324 if (current_class_type
)
10325 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10326 /*complain=*/true);
10328 error ("trying to make class %qT a friend of global scope",
10331 type
= void_type_node
;
10334 else if (memfn_quals
|| rqual
)
10336 if (ctype
== NULL_TREE
10337 && TREE_CODE (type
) == METHOD_TYPE
)
10338 ctype
= TYPE_METHOD_BASETYPE (type
);
10341 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10342 /* Core issue #547: need to allow this in template type args.
10343 Allow it in general in C++11 for alias-declarations. */
10344 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10345 && TREE_CODE (type
) == FUNCTION_TYPE
)
10346 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10348 error ("invalid qualifiers on non-member function type");
10353 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10354 && decl_context
!= CATCHPARM
10355 && TREE_CODE (type
) != UNION_TYPE
10358 error ("abstract declarator %qT used as declaration", type
);
10359 return error_mark_node
;
10362 /* Only functions may be declared using an operator-function-id. */
10364 && IDENTIFIER_OPNAME_P (unqualified_id
)
10365 && TREE_CODE (type
) != FUNCTION_TYPE
10366 && TREE_CODE (type
) != METHOD_TYPE
)
10368 error ("declaration of %qD as non-function", unqualified_id
);
10369 return error_mark_node
;
10372 /* We don't check parameter types here because we can emit a better
10373 error message later. */
10374 if (decl_context
!= PARM
)
10376 type
= check_var_type (unqualified_id
, type
);
10377 if (type
== error_mark_node
)
10378 return error_mark_node
;
10381 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10382 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10384 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10386 if (ctype
|| in_namespace
)
10387 error ("cannot use %<::%> in parameter declaration");
10389 if (type_uses_auto (type
))
10391 if (cxx_dialect
>= cxx1y
)
10392 error ("%<auto%> parameter not permitted in this context");
10394 error ("parameter declared %<auto%>");
10395 type
= error_mark_node
;
10398 /* A parameter declared as an array of T is really a pointer to T.
10399 One declared as a function is really a pointer to a function.
10400 One declared as a member is really a pointer to member. */
10402 if (TREE_CODE (type
) == ARRAY_TYPE
)
10404 /* Transfer const-ness of array into that of type pointed to. */
10405 type
= build_pointer_type (TREE_TYPE (type
));
10406 type_quals
= TYPE_UNQUALIFIED
;
10408 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10409 type
= build_pointer_type (type
);
10412 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10413 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10415 cp_cv_quals real_quals
= memfn_quals
;
10416 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10417 real_quals
|= TYPE_QUAL_CONST
;
10418 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10424 if (decl_context
== PARM
)
10426 decl
= cp_build_parm_decl (unqualified_id
, type
);
10428 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10429 memfn_quals
!= TYPE_UNQUALIFIED
,
10430 inlinep
, friendp
, raises
!= NULL_TREE
);
10432 else if (decl_context
== FIELD
)
10434 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10435 && type_uses_auto (type
))
10437 error ("non-static data member declared %<auto%>");
10438 type
= error_mark_node
;
10441 /* The C99 flexible array extension. */
10442 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10443 && TYPE_DOMAIN (type
) == NULL_TREE
)
10445 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10446 tf_warning_or_error
);
10447 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10450 if (type
== error_mark_node
)
10452 /* Happens when declaring arrays of sizes which
10453 are error_mark_node, for example. */
10456 else if (in_namespace
&& !friendp
)
10458 /* Something like struct S { int N::j; }; */
10459 error ("invalid use of %<::%>");
10460 return error_mark_node
;
10462 else if (TREE_CODE (type
) == FUNCTION_TYPE
10463 || TREE_CODE (type
) == METHOD_TYPE
)
10466 tree function_context
;
10470 /* This should never happen in pure C++ (the check
10471 could be an assert). It could happen in
10472 Objective-C++ if someone writes invalid code that
10473 uses a function declaration for an instance
10474 variable or property (instance variables and
10475 properties are parsed as FIELD_DECLs, but they are
10476 part of an Objective-C class, not a C++ class).
10477 That code is invalid and is caught by this
10481 error ("declaration of function %qD in invalid context",
10483 return error_mark_node
;
10486 /* ``A union may [ ... ] not [ have ] virtual functions.''
10488 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10490 error ("function %qD declared virtual inside a union",
10492 return error_mark_node
;
10495 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10499 error ("%qD cannot be declared virtual, since it "
10500 "is always static",
10507 /* Check that the name used for a destructor makes sense. */
10508 if (sfk
== sfk_destructor
)
10510 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10514 gcc_assert (friendp
);
10515 error ("expected qualified name in friend declaration "
10516 "for destructor %qD", uqname
);
10517 return error_mark_node
;
10520 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10522 error ("declaration of %qD as member of %qT",
10524 return error_mark_node
;
10528 error ("a destructor cannot be %<constexpr%>");
10529 return error_mark_node
;
10532 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10534 error ("expected qualified name in friend declaration "
10535 "for constructor %qD",
10536 id_declarator
->u
.id
.unqualified_name
);
10537 return error_mark_node
;
10540 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10541 function_context
= (ctype
!= NULL_TREE
) ?
10542 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10543 publicp
= (! friendp
|| ! staticp
)
10544 && function_context
== NULL_TREE
;
10545 decl
= grokfndecl (ctype
, type
,
10546 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10547 ? unqualified_id
: dname
,
10550 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10551 friendp
? -1 : 0, friendp
, publicp
,
10552 inlinep
| (2 * constexpr_p
),
10554 funcdef_flag
, template_count
, in_namespace
,
10555 attrlist
, declarator
->id_loc
);
10556 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10557 if (decl
== NULL_TREE
)
10558 return error_mark_node
;
10560 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10561 /* The decl and setting of decl_attr is also turned off. */
10562 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10565 /* [class.conv.ctor]
10567 A constructor declared without the function-specifier
10568 explicit that can be called with a single parameter
10569 specifies a conversion from the type of its first
10570 parameter to the type of its class. Such a constructor
10571 is called a converting constructor. */
10572 if (explicitp
== 2)
10573 DECL_NONCONVERTING_P (decl
) = 1;
10575 else if (!staticp
&& !dependent_type_p (type
)
10576 && !COMPLETE_TYPE_P (complete_type (type
))
10577 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10579 if (unqualified_id
)
10580 error ("field %qD has incomplete type %qT",
10581 unqualified_id
, type
);
10583 error ("name %qT has incomplete type", type
);
10585 type
= error_mark_node
;
10592 error ("%qE is neither function nor member function; "
10593 "cannot be declared friend", unqualified_id
);
10601 /* Friends are treated specially. */
10602 if (ctype
== current_class_type
)
10603 ; /* We already issued a permerror. */
10604 else if (decl
&& DECL_NAME (decl
))
10606 if (template_class_depth (current_class_type
) == 0)
10608 decl
= check_explicit_specialization
10609 (unqualified_id
, decl
, template_count
,
10610 2 * funcdef_flag
+ 4);
10611 if (decl
== error_mark_node
)
10612 return error_mark_node
;
10615 decl
= do_friend (ctype
, unqualified_id
, decl
,
10621 return error_mark_node
;
10624 /* Structure field. It may not be a function, except for C++. */
10626 if (decl
== NULL_TREE
)
10630 /* C++ allows static class members. All other work
10631 for this is done by grokfield. */
10632 decl
= build_lang_decl_loc (declarator
->id_loc
,
10633 VAR_DECL
, unqualified_id
, type
);
10634 set_linkage_for_static_data_member (decl
);
10635 /* Even if there is an in-class initialization, DECL
10636 is considered undefined until an out-of-class
10637 definition is provided. */
10638 DECL_EXTERNAL (decl
) = 1;
10642 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10643 if (declspecs
->gnu_thread_keyword_p
)
10644 DECL_GNU_TLS_P (decl
) = true;
10647 if (constexpr_p
&& !initialized
)
10649 error ("constexpr static data member %qD must have an "
10650 "initializer", decl
);
10651 constexpr_p
= false;
10658 error ("non-static data member %qE declared %<constexpr%>",
10660 constexpr_p
= false;
10662 decl
= build_decl (input_location
,
10663 FIELD_DECL
, unqualified_id
, type
);
10664 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10665 if (bitfield
&& !unqualified_id
)
10666 TREE_NO_WARNING (decl
) = 1;
10668 if (storage_class
== sc_mutable
)
10670 DECL_MUTABLE_P (decl
) = 1;
10671 storage_class
= sc_none
;
10676 /* An attempt is being made to initialize a non-static
10677 member. This is new in C++11. */
10678 maybe_warn_cpp0x (CPP0X_NSDMI
);
10680 /* If this has been parsed with static storage class, but
10681 errors forced staticp to be cleared, ensure NSDMI is
10683 if (declspecs
->storage_class
== sc_static
)
10684 DECL_INITIAL (decl
) = error_mark_node
;
10688 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10689 memfn_quals
!= TYPE_UNQUALIFIED
,
10690 inlinep
, friendp
, raises
!= NULL_TREE
);
10693 else if (TREE_CODE (type
) == FUNCTION_TYPE
10694 || TREE_CODE (type
) == METHOD_TYPE
)
10696 tree original_name
;
10699 if (!unqualified_id
)
10700 return error_mark_node
;
10702 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10703 original_name
= dname
;
10705 original_name
= unqualified_id
;
10707 if (storage_class
== sc_auto
)
10708 error ("storage class %<auto%> invalid for function %qs", name
);
10709 else if (storage_class
== sc_register
)
10710 error ("storage class %<register%> invalid for function %qs", name
);
10713 if (declspecs
->gnu_thread_keyword_p
)
10714 error ("storage class %<__thread%> invalid for function %qs",
10717 error ("storage class %<thread_local%> invalid for function %qs",
10721 if (virt_specifiers
)
10722 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10723 /* Function declaration not at top level.
10724 Storage classes other than `extern' are not allowed
10725 and `extern' makes no difference. */
10726 if (! toplevel_bindings_p ()
10727 && (storage_class
== sc_static
10728 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10731 if (storage_class
== sc_static
)
10732 pedwarn (input_location
, OPT_Wpedantic
,
10733 "%<static%> specified invalid for function %qs "
10734 "declared out of global scope", name
);
10736 pedwarn (input_location
, OPT_Wpedantic
,
10737 "%<inline%> specifier invalid for function %qs "
10738 "declared out of global scope", name
);
10741 if (ctype
== NULL_TREE
)
10745 error ("virtual non-class function %qs", name
);
10748 else if (sfk
== sfk_constructor
10749 || sfk
== sfk_destructor
)
10751 error (funcdef_flag
10752 ? G_("%qs defined in a non-class scope")
10753 : G_("%qs declared in a non-class scope"), name
);
10758 /* Record whether the function is public. */
10759 publicp
= (ctype
!= NULL_TREE
10760 || storage_class
!= sc_static
);
10762 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10763 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10765 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10767 template_count
, in_namespace
, attrlist
,
10768 declarator
->id_loc
);
10769 if (decl
== NULL_TREE
)
10770 return error_mark_node
;
10774 int invalid_static
= 0;
10776 /* Don't allow a static member function in a class, and forbid
10777 declaring main to be static. */
10778 if (TREE_CODE (type
) == METHOD_TYPE
)
10780 permerror (input_location
, "cannot declare member function %qD to have "
10781 "static linkage", decl
);
10782 invalid_static
= 1;
10784 else if (current_function_decl
)
10786 /* FIXME need arm citation */
10787 error ("cannot declare static function inside another function");
10788 invalid_static
= 1;
10791 if (invalid_static
)
10794 storage_class
= sc_none
;
10800 /* It's a variable. */
10802 /* An uninitialized decl with `extern' is a reference. */
10803 decl
= grokvardecl (type
, unqualified_id
,
10806 (type_quals
& TYPE_QUAL_CONST
) != 0,
10807 ctype
? ctype
: in_namespace
);
10808 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10809 memfn_quals
!= TYPE_UNQUALIFIED
,
10810 inlinep
, friendp
, raises
!= NULL_TREE
);
10814 DECL_CONTEXT (decl
) = ctype
;
10817 permerror (input_location
, "%<static%> may not be used when defining "
10818 "(as opposed to declaring) a static data member");
10820 storage_class
= sc_none
;
10822 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10824 error ("static member %qD declared %<register%>", decl
);
10825 storage_class
= sc_none
;
10827 if (storage_class
== sc_extern
&& pedantic
)
10829 pedwarn (input_location
, OPT_Wpedantic
,
10830 "cannot explicitly declare member %q#D to have "
10831 "extern linkage", decl
);
10832 storage_class
= sc_none
;
10835 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10837 error ("declaration of constexpr variable %qD is not a definition",
10839 constexpr_p
= false;
10843 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10845 if (toplevel_bindings_p ())
10847 /* It's common practice (and completely valid) to have a const
10848 be initialized and declared extern. */
10849 if (!(type_quals
& TYPE_QUAL_CONST
))
10850 warning (0, "%qs initialized and declared %<extern%>", name
);
10854 error ("%qs has both %<extern%> and initializer", name
);
10855 return error_mark_node
;
10859 /* Record `register' declaration for warnings on &
10860 and in case doing stupid register allocation. */
10862 if (storage_class
== sc_register
)
10863 DECL_REGISTER (decl
) = 1;
10864 else if (storage_class
== sc_extern
)
10865 DECL_THIS_EXTERN (decl
) = 1;
10866 else if (storage_class
== sc_static
)
10867 DECL_THIS_STATIC (decl
) = 1;
10869 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10870 if (constexpr_p
&& VAR_P (decl
))
10871 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10873 /* Record constancy and volatility on the DECL itself . There's
10874 no need to do this when processing a template; we'll do this
10875 for the instantiated declaration based on the type of DECL. */
10876 if (!processing_template_decl
)
10877 cp_apply_type_quals_to_decl (type_quals
, decl
);
10883 /* Subroutine of start_function. Ensure that each of the parameter
10884 types (as listed in PARMS) is complete, as is required for a
10885 function definition. */
10888 require_complete_types_for_parms (tree parms
)
10890 for (; parms
; parms
= DECL_CHAIN (parms
))
10892 if (dependent_type_p (TREE_TYPE (parms
)))
10894 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10895 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10897 relayout_decl (parms
);
10898 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10901 /* grokparms or complete_type_or_else will have already issued
10903 TREE_TYPE (parms
) = error_mark_node
;
10907 /* Returns nonzero if T is a local variable. */
10910 local_variable_p (const_tree t
)
10913 /* A VAR_DECL with a context that is a _TYPE is a static data
10915 && !TYPE_P (CP_DECL_CONTEXT (t
))
10916 /* Any other non-local variable must be at namespace scope. */
10917 && !DECL_NAMESPACE_SCOPE_P (t
))
10918 || (TREE_CODE (t
) == PARM_DECL
))
10924 /* Like local_variable_p, but suitable for use as a tree-walking
10928 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10931 if (local_variable_p (*tp
)
10932 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10934 else if (TYPE_P (*tp
))
10935 *walk_subtrees
= 0;
10940 /* Check that ARG, which is a default-argument expression for a
10941 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10942 something goes wrong. DECL may also be a _TYPE node, rather than a
10943 DECL, if there is no DECL available. */
10946 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
10951 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10952 /* We get a DEFAULT_ARG when looking at an in-class declaration
10953 with a default argument. Ignore the argument for now; we'll
10954 deal with it after the class is complete. */
10963 decl_type
= TREE_TYPE (decl
);
10965 if (arg
== error_mark_node
10966 || decl
== error_mark_node
10967 || TREE_TYPE (arg
) == error_mark_node
10968 || decl_type
== error_mark_node
)
10969 /* Something already went wrong. There's no need to check
10971 return error_mark_node
;
10973 /* [dcl.fct.default]
10975 A default argument expression is implicitly converted to the
10977 ++cp_unevaluated_operand
;
10978 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
10980 --cp_unevaluated_operand
;
10982 if (warn_zero_as_null_pointer_constant
10983 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10984 && null_ptr_cst_p (arg
)
10985 && (complain
& tf_warning
)
10986 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
10987 return nullptr_node
;
10989 /* [dcl.fct.default]
10991 Local variables shall not be used in default argument
10994 The keyword `this' shall not be used in a default argument of a
10995 member function. */
10996 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10999 if (complain
& tf_warning_or_error
)
11001 if (DECL_NAME (var
) == this_identifier
)
11002 permerror (input_location
, "default argument %qE uses %qD",
11005 error ("default argument %qE uses local variable %qD", arg
, var
);
11007 return error_mark_node
;
11014 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11017 type_is_deprecated (tree type
)
11019 enum tree_code code
;
11020 if (TREE_DEPRECATED (type
))
11022 if (TYPE_NAME (type
)
11023 && TREE_DEPRECATED (TYPE_NAME (type
)))
11026 /* Do warn about using typedefs to a deprecated class. */
11027 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11028 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11030 code
= TREE_CODE (type
);
11032 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11033 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11034 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11035 return type_is_deprecated (TREE_TYPE (type
));
11037 if (TYPE_PTRMEMFUNC_P (type
))
11038 return type_is_deprecated
11039 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11044 /* Decode the list of parameter types for a function type.
11045 Given the list of things declared inside the parens,
11046 return a list of types.
11048 If this parameter does not end with an ellipsis, we append
11051 *PARMS is set to the chain of PARM_DECLs created. */
11054 grokparms (tree parmlist
, tree
*parms
)
11056 tree result
= NULL_TREE
;
11057 tree decls
= NULL_TREE
;
11061 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11063 tree type
= NULL_TREE
;
11064 tree init
= TREE_PURPOSE (parm
);
11065 tree decl
= TREE_VALUE (parm
);
11066 const char *errmsg
;
11068 if (parm
== void_list_node
)
11071 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11074 type
= TREE_TYPE (decl
);
11075 if (VOID_TYPE_P (type
))
11077 if (same_type_p (type
, void_type_node
)
11078 && DECL_SELF_REFERENCE_P (type
)
11079 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11080 /* this is a parmlist of `(void)', which is ok. */
11082 cxx_incomplete_type_error (decl
, type
);
11083 /* It's not a good idea to actually create parameters of
11084 type `void'; other parts of the compiler assume that a
11085 void type terminates the parameter list. */
11086 type
= error_mark_node
;
11087 TREE_TYPE (decl
) = error_mark_node
;
11090 if (type
!= error_mark_node
11091 && TYPE_FOR_JAVA (type
)
11092 && MAYBE_CLASS_TYPE_P (type
))
11094 error ("parameter %qD has Java class type", decl
);
11095 type
= error_mark_node
;
11096 TREE_TYPE (decl
) = error_mark_node
;
11100 if (type
!= error_mark_node
11101 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11104 type
= error_mark_node
;
11105 TREE_TYPE (decl
) = error_mark_node
;
11108 if (type
!= error_mark_node
)
11110 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11112 tree deptype
= type_is_deprecated (type
);
11114 warn_deprecated_use (deptype
, NULL_TREE
);
11117 /* Top-level qualifiers on the parameters are
11118 ignored for function types. */
11119 type
= cp_build_qualified_type (type
, 0);
11120 if (TREE_CODE (type
) == METHOD_TYPE
)
11122 error ("parameter %qD invalidly declared method type", decl
);
11123 type
= build_pointer_type (type
);
11124 TREE_TYPE (decl
) = type
;
11126 else if (abstract_virtuals_error (decl
, type
))
11127 any_error
= 1; /* Seems like a good idea. */
11128 else if (POINTER_TYPE_P (type
))
11130 /* [dcl.fct]/6, parameter types cannot contain pointers
11131 (references) to arrays of unknown bound. */
11132 tree t
= TREE_TYPE (type
);
11133 int ptr
= TYPE_PTR_P (type
);
11137 if (TYPE_PTR_P (t
))
11139 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11141 else if (!TYPE_DOMAIN (t
))
11145 if (TREE_CODE (t
) == ARRAY_TYPE
)
11147 ? G_("parameter %qD includes pointer to array of "
11148 "unknown bound %qT")
11149 : G_("parameter %qD includes reference to array of "
11150 "unknown bound %qT"),
11156 else if (init
&& !processing_template_decl
)
11157 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11160 DECL_CHAIN (decl
) = decls
;
11162 result
= tree_cons (init
, type
, result
);
11164 decls
= nreverse (decls
);
11165 result
= nreverse (result
);
11167 result
= chainon (result
, void_list_node
);
11174 /* D is a constructor or overloaded `operator='.
11176 Let T be the class in which D is declared. Then, this function
11179 -1 if D's is an ill-formed constructor or copy assignment operator
11180 whose first parameter is of type `T'.
11181 0 if D is not a copy constructor or copy assignment
11183 1 if D is a copy constructor or copy assignment operator whose
11184 first parameter is a reference to non-const qualified T.
11185 2 if D is a copy constructor or copy assignment operator whose
11186 first parameter is a reference to const qualified T.
11188 This function can be used as a predicate. Positive values indicate
11189 a copy constructor and nonzero values indicate a copy assignment
11193 copy_fn_p (const_tree d
)
11199 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11201 if (TREE_CODE (d
) == TEMPLATE_DECL
11202 || (DECL_TEMPLATE_INFO (d
)
11203 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11204 /* Instantiations of template member functions are never copy
11205 functions. Note that member functions of templated classes are
11206 represented as template functions internally, and we must
11207 accept those as copy functions. */
11210 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11214 arg_type
= TREE_VALUE (args
);
11215 if (arg_type
== error_mark_node
)
11218 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11220 /* Pass by value copy assignment operator. */
11223 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11224 && !TYPE_REF_IS_RVALUE (arg_type
)
11225 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11227 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11233 args
= TREE_CHAIN (args
);
11235 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11236 /* There are more non-optional args. */
11242 /* D is a constructor or overloaded `operator='.
11244 Let T be the class in which D is declared. Then, this function
11245 returns true when D is a move constructor or move assignment
11246 operator, false otherwise. */
11249 move_fn_p (const_tree d
)
11251 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11253 if (cxx_dialect
== cxx98
)
11254 /* There are no move constructors if we are in C++98 mode. */
11257 if (TREE_CODE (d
) == TEMPLATE_DECL
11258 || (DECL_TEMPLATE_INFO (d
)
11259 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11260 /* Instantiations of template member functions are never move
11261 functions. Note that member functions of templated classes are
11262 represented as template functions internally, and we must
11263 accept those as move functions. */
11266 return move_signature_fn_p (d
);
11269 /* D is a constructor or overloaded `operator='.
11271 Then, this function returns true when D has the same signature as a move
11272 constructor or move assignment operator (because either it is such a
11273 ctor/op= or it is a template specialization with the same signature),
11274 false otherwise. */
11277 move_signature_fn_p (const_tree d
)
11281 bool result
= false;
11283 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11287 arg_type
= TREE_VALUE (args
);
11288 if (arg_type
== error_mark_node
)
11291 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11292 && TYPE_REF_IS_RVALUE (arg_type
)
11293 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11297 args
= TREE_CHAIN (args
);
11299 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11300 /* There are more non-optional args. */
11306 /* Remember any special properties of member function DECL. */
11309 grok_special_member_properties (tree decl
)
11313 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11316 class_type
= DECL_CONTEXT (decl
);
11317 if (DECL_CONSTRUCTOR_P (decl
))
11319 int ctor
= copy_fn_p (decl
);
11321 if (!DECL_ARTIFICIAL (decl
))
11322 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11328 A non-template constructor for class X is a copy
11329 constructor if its first parameter is of type X&, const
11330 X&, volatile X& or const volatile X&, and either there
11331 are no other parameters or else all other parameters have
11332 default arguments. */
11333 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11334 if (user_provided_p (decl
))
11335 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11337 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11339 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11341 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11342 if (user_provided_p (decl
))
11343 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11345 else if (move_fn_p (decl
) && user_provided_p (decl
))
11346 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11347 else if (is_list_ctor (decl
))
11348 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11350 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11351 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11352 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11354 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11358 A non-template assignment operator for class X is a copy
11359 assignment operator if its parameter is of type X, X&, const
11360 X&, volatile X& or const volatile X&. */
11362 int assop
= copy_fn_p (decl
);
11366 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11367 if (user_provided_p (decl
))
11368 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11370 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11372 else if (move_fn_p (decl
) && user_provided_p (decl
))
11373 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11375 /* Destructors are handled in check_methods. */
11378 /* Check a constructor DECL has the correct form. Complains
11379 if the class has a constructor of the form X(X). */
11382 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11384 int ctor_parm
= copy_fn_p (decl
);
11390 A declaration of a constructor for a class X is ill-formed if
11391 its first parameter is of type (optionally cv-qualified) X
11392 and either there are no other parameters or else all other
11393 parameters have default arguments.
11395 We *don't* complain about member template instantiations that
11396 have this form, though; they can occur as we try to decide
11397 what constructor to use during overload resolution. Since
11398 overload resolution will never prefer such a constructor to
11399 the non-template copy constructor (which is either explicitly
11400 or implicitly defined), there's no need to worry about their
11401 existence. Theoretically, they should never even be
11402 instantiated, but that's hard to forestall. */
11403 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11411 /* An operator with this code is unary, but can also be binary. */
11414 ambi_op_p (enum tree_code code
)
11416 return (code
== INDIRECT_REF
11417 || code
== ADDR_EXPR
11418 || code
== UNARY_PLUS_EXPR
11419 || code
== NEGATE_EXPR
11420 || code
== PREINCREMENT_EXPR
11421 || code
== PREDECREMENT_EXPR
);
11424 /* An operator with this name can only be unary. */
11427 unary_op_p (enum tree_code code
)
11429 return (code
== TRUTH_NOT_EXPR
11430 || code
== BIT_NOT_EXPR
11431 || code
== COMPONENT_REF
11432 || code
== TYPE_EXPR
);
11435 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11436 errors are issued for invalid declarations. */
11439 grok_op_properties (tree decl
, bool complain
)
11441 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11443 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11444 tree name
= DECL_NAME (decl
);
11445 enum tree_code operator_code
;
11450 /* Count the number of arguments and check for ellipsis. */
11451 for (argtype
= argtypes
, arity
= 0;
11452 argtype
&& argtype
!= void_list_node
;
11453 argtype
= TREE_CHAIN (argtype
))
11455 ellipsis_p
= !argtype
;
11457 class_type
= DECL_CONTEXT (decl
);
11458 if (class_type
&& !CLASS_TYPE_P (class_type
))
11459 class_type
= NULL_TREE
;
11461 if (DECL_CONV_FN_P (decl
))
11462 operator_code
= TYPE_EXPR
;
11466 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11467 if (ansi_opname (CODE) == name) \
11469 operator_code = (CODE); \
11472 else if (ansi_assopname (CODE) == name) \
11474 operator_code = (CODE); \
11475 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11479 #include "operators.def"
11480 #undef DEF_OPERATOR
11482 gcc_unreachable ();
11485 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11486 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11489 switch (operator_code
)
11492 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11496 TYPE_GETS_DELETE (class_type
) |= 1;
11500 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11503 case VEC_DELETE_EXPR
:
11504 TYPE_GETS_DELETE (class_type
) |= 2;
11511 /* [basic.std.dynamic.allocation]/1:
11513 A program is ill-formed if an allocation function is declared
11514 in a namespace scope other than global scope or declared static
11517 The same also holds true for deallocation functions. */
11518 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11519 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11521 if (DECL_NAMESPACE_SCOPE_P (decl
))
11523 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11525 error ("%qD may not be declared within a namespace", decl
);
11528 else if (!TREE_PUBLIC (decl
))
11530 error ("%qD may not be declared as static", decl
);
11536 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11538 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11539 DECL_IS_OPERATOR_NEW (decl
) = 1;
11541 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11542 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11545 /* An operator function must either be a non-static member function
11546 or have at least one parameter of a class, a reference to a class,
11547 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11548 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11550 if (operator_code
== TYPE_EXPR
11551 || operator_code
== CALL_EXPR
11552 || operator_code
== COMPONENT_REF
11553 || operator_code
== ARRAY_REF
11554 || operator_code
== NOP_EXPR
)
11556 error ("%qD must be a nonstatic member function", decl
);
11563 if (DECL_STATIC_FUNCTION_P (decl
))
11565 error ("%qD must be either a non-static member "
11566 "function or a non-member function", decl
);
11570 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11572 tree arg
= non_reference (TREE_VALUE (p
));
11573 if (arg
== error_mark_node
)
11576 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11577 because these checks are performed even on
11578 template functions. */
11579 if (MAYBE_CLASS_TYPE_P (arg
)
11580 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11584 if (!p
|| p
== void_list_node
)
11587 error ("%qD must have an argument of class or "
11588 "enumerated type", decl
);
11594 /* There are no restrictions on the arguments to an overloaded
11596 if (operator_code
== CALL_EXPR
)
11599 /* Warn about conversion operators that will never be used. */
11600 if (IDENTIFIER_TYPENAME_P (name
)
11601 && ! DECL_TEMPLATE_INFO (decl
)
11603 /* Warn only declaring the function; there is no need to
11604 warn again about out-of-class definitions. */
11605 && class_type
== current_class_type
)
11607 tree t
= TREE_TYPE (name
);
11608 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11611 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11613 if (VOID_TYPE_P (t
))
11614 warning (OPT_Wconversion
,
11616 ? G_("conversion to a reference to void "
11617 "will never use a type conversion operator")
11618 : G_("conversion to void "
11619 "will never use a type conversion operator"));
11620 else if (class_type
)
11622 if (t
== class_type
)
11623 warning (OPT_Wconversion
,
11625 ? G_("conversion to a reference to the same type "
11626 "will never use a type conversion operator")
11627 : G_("conversion to the same type "
11628 "will never use a type conversion operator"));
11629 /* Don't force t to be complete here. */
11630 else if (MAYBE_CLASS_TYPE_P (t
)
11631 && COMPLETE_TYPE_P (t
)
11632 && DERIVED_FROM_P (t
, class_type
))
11633 warning (OPT_Wconversion
,
11635 ? G_("conversion to a reference to a base class "
11636 "will never use a type conversion operator")
11637 : G_("conversion to a base class "
11638 "will never use a type conversion operator"));
11643 if (operator_code
== COND_EXPR
)
11646 error ("ISO C++ prohibits overloading operator ?:");
11649 else if (ellipsis_p
)
11651 error ("%qD must not have variable number of arguments", decl
);
11654 else if (ambi_op_p (operator_code
))
11657 /* We pick the one-argument operator codes by default, so
11658 we don't have to change anything. */
11660 else if (arity
== 2)
11662 /* If we thought this was a unary operator, we now know
11663 it to be a binary operator. */
11664 switch (operator_code
)
11667 operator_code
= MULT_EXPR
;
11671 operator_code
= BIT_AND_EXPR
;
11674 case UNARY_PLUS_EXPR
:
11675 operator_code
= PLUS_EXPR
;
11679 operator_code
= MINUS_EXPR
;
11682 case PREINCREMENT_EXPR
:
11683 operator_code
= POSTINCREMENT_EXPR
;
11686 case PREDECREMENT_EXPR
:
11687 operator_code
= POSTDECREMENT_EXPR
;
11691 gcc_unreachable ();
11694 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11696 if ((operator_code
== POSTINCREMENT_EXPR
11697 || operator_code
== POSTDECREMENT_EXPR
)
11698 && ! processing_template_decl
11699 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11702 error ("postfix %qD must take %<int%> as its argument",
11705 error ("postfix %qD must take %<int%> as its second "
11713 error ("%qD must take either zero or one argument", decl
);
11715 error ("%qD must take either one or two arguments", decl
);
11719 /* More Effective C++ rule 6. */
11721 && (operator_code
== POSTINCREMENT_EXPR
11722 || operator_code
== POSTDECREMENT_EXPR
11723 || operator_code
== PREINCREMENT_EXPR
11724 || operator_code
== PREDECREMENT_EXPR
))
11726 tree arg
= TREE_VALUE (argtypes
);
11727 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11728 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11729 arg
= TREE_TYPE (arg
);
11730 arg
= TYPE_MAIN_VARIANT (arg
);
11731 if (operator_code
== PREINCREMENT_EXPR
11732 || operator_code
== PREDECREMENT_EXPR
)
11734 if (TREE_CODE (ret
) != REFERENCE_TYPE
11735 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11737 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11738 build_reference_type (arg
));
11742 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11743 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11747 else if (unary_op_p (operator_code
))
11752 error ("%qD must take %<void%>", decl
);
11754 error ("%qD must take exactly one argument", decl
);
11758 else /* if (binary_op_p (operator_code)) */
11763 error ("%qD must take exactly one argument", decl
);
11765 error ("%qD must take exactly two arguments", decl
);
11769 /* More Effective C++ rule 7. */
11771 && (operator_code
== TRUTH_ANDIF_EXPR
11772 || operator_code
== TRUTH_ORIF_EXPR
11773 || operator_code
== COMPOUND_EXPR
))
11774 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11778 /* Effective C++ rule 23. */
11781 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11782 && (operator_code
== PLUS_EXPR
11783 || operator_code
== MINUS_EXPR
11784 || operator_code
== TRUNC_DIV_EXPR
11785 || operator_code
== MULT_EXPR
11786 || operator_code
== TRUNC_MOD_EXPR
)
11787 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11788 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11790 /* [over.oper]/8 */
11791 for (; argtypes
&& argtypes
!= void_list_node
;
11792 argtypes
= TREE_CHAIN (argtypes
))
11793 if (TREE_PURPOSE (argtypes
))
11795 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11796 if (operator_code
== POSTINCREMENT_EXPR
11797 || operator_code
== POSTDECREMENT_EXPR
)
11799 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11804 error ("%qD cannot have default arguments", decl
);
11812 /* Return a string giving the keyword associate with CODE. */
11814 static const char *
11815 tag_name (enum tag_types code
)
11827 case typename_type
:
11830 gcc_unreachable ();
11834 /* Name lookup in an elaborated-type-specifier (after the keyword
11835 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11836 elaborated-type-specifier is invalid, issue a diagnostic and return
11837 error_mark_node; otherwise, return the *_TYPE to which it referred.
11838 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11841 check_elaborated_type_specifier (enum tag_types tag_code
,
11843 bool allow_template_p
)
11849 struct S { struct S *p; };
11851 name lookup will find the TYPE_DECL for the implicit "S::S"
11852 typedef. Adjust for that here. */
11853 if (DECL_SELF_REFERENCE_P (decl
))
11854 decl
= TYPE_NAME (TREE_TYPE (decl
));
11856 type
= TREE_TYPE (decl
);
11858 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11859 is false for this case as well. */
11860 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11862 error ("using template type parameter %qT after %qs",
11863 type
, tag_name (tag_code
));
11864 return error_mark_node
;
11866 /* Accept template template parameters. */
11867 else if (allow_template_p
11868 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11869 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11873 If the identifier resolves to a typedef-name or the
11874 simple-template-id resolves to an alias template
11875 specialization, the elaborated-type-specifier is ill-formed.
11877 In other words, the only legitimate declaration to use in the
11878 elaborated type specifier is the implicit typedef created when
11879 the type is declared. */
11880 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11881 && !DECL_SELF_REFERENCE_P (decl
)
11882 && tag_code
!= typename_type
)
11884 if (alias_template_specialization_p (type
))
11885 error ("using alias template specialization %qT after %qs",
11886 type
, tag_name (tag_code
));
11888 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11889 inform (DECL_SOURCE_LOCATION (decl
),
11890 "%qD has a previous declaration here", decl
);
11891 return error_mark_node
;
11893 else if (TREE_CODE (type
) != RECORD_TYPE
11894 && TREE_CODE (type
) != UNION_TYPE
11895 && tag_code
!= enum_type
11896 && tag_code
!= typename_type
)
11898 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11899 inform (input_location
, "%q+T has a previous declaration here", type
);
11900 return error_mark_node
;
11902 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11903 && tag_code
== enum_type
)
11905 error ("%qT referred to as enum", type
);
11906 inform (input_location
, "%q+T has a previous declaration here", type
);
11907 return error_mark_node
;
11909 else if (!allow_template_p
11910 && TREE_CODE (type
) == RECORD_TYPE
11911 && CLASSTYPE_IS_TEMPLATE (type
))
11913 /* If a class template appears as elaborated type specifier
11914 without a template header such as:
11916 template <class T> class C {};
11917 void f(class C); // No template header here
11919 then the required template argument is missing. */
11920 error ("template argument required for %<%s %T%>",
11921 tag_name (tag_code
),
11922 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11923 return error_mark_node
;
11929 /* Lookup NAME in elaborate type specifier in scope according to
11930 SCOPE and issue diagnostics if necessary.
11931 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11932 found, and ERROR_MARK_NODE for type error. */
11935 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11936 tag_scope scope
, bool template_header_p
)
11940 if (scope
== ts_global
)
11942 /* First try ordinary name lookup, ignoring hidden class name
11943 injected via friend declaration. */
11944 decl
= lookup_name_prefer_type (name
, 2);
11945 /* If that fails, the name will be placed in the smallest
11946 non-class, non-function-prototype scope according to 3.3.1/5.
11947 We may already have a hidden name declared as friend in this
11948 scope. So lookup again but not ignoring hidden names.
11949 If we find one, that name will be made visible rather than
11950 creating a new tag. */
11952 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11955 decl
= lookup_type_scope (name
, scope
);
11958 && (DECL_CLASS_TEMPLATE_P (decl
)
11959 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11960 decl
= DECL_TEMPLATE_RESULT (decl
);
11962 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11964 /* Look for invalid nested type:
11968 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11970 error ("%qD has the same name as the class in which it is "
11973 return error_mark_node
;
11976 /* Two cases we need to consider when deciding if a class
11977 template is allowed as an elaborated type specifier:
11978 1. It is a self reference to its own class.
11979 2. It comes with a template header.
11983 template <class T> class C {
11984 class C *c1; // DECL_SELF_REFERENCE_P is true
11987 template <class U> class C; // template_header_p is true
11988 template <class T> class C<T>::D {
11989 class C *c2; // DECL_SELF_REFERENCE_P is true
11992 t
= check_elaborated_type_specifier (tag_code
,
11995 | DECL_SELF_REFERENCE_P (decl
));
11998 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12000 error ("reference to %qD is ambiguous", name
);
12001 print_candidates (decl
);
12002 return error_mark_node
;
12008 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12009 Define the tag as a forward-reference if it is not defined.
12011 If a declaration is given, process it here, and report an error if
12012 multiple declarations are not identical.
12014 SCOPE is TS_CURRENT when this is also a definition. Only look in
12015 the current frame for the name (since C++ allows new names in any
12016 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12017 declaration. Only look beginning from the current scope outward up
12018 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12020 TEMPLATE_HEADER_P is true when this declaration is preceded by
12021 a set of template parameters. */
12024 xref_tag_1 (enum tag_types tag_code
, tree name
,
12025 tag_scope orig_scope
, bool template_header_p
)
12027 enum tree_code code
;
12029 tree context
= NULL_TREE
;
12032 gcc_assert (identifier_p (name
));
12038 code
= RECORD_TYPE
;
12044 code
= ENUMERAL_TYPE
;
12047 gcc_unreachable ();
12050 if (orig_scope
== ts_lambda
)
12051 scope
= ts_current
;
12053 scope
= orig_scope
;
12055 /* In case of anonymous name, xref_tag is only called to
12056 make type node and push name. Name lookup is not required. */
12057 if (ANON_AGGRNAME_P (name
))
12060 t
= lookup_and_check_tag (tag_code
, name
,
12061 scope
, template_header_p
);
12063 if (t
== error_mark_node
)
12064 return error_mark_node
;
12066 if (scope
!= ts_current
&& t
&& current_class_type
12067 && template_class_depth (current_class_type
)
12068 && template_header_p
)
12070 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12073 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12074 definition of this tag. Since, in addition, we are currently
12075 processing a (member) template declaration of a template
12076 class, we must be very careful; consider:
12083 { template <class V>
12084 friend struct S1; };
12086 Here, the S2::S1 declaration should not be confused with the
12087 outer declaration. In particular, the inner version should
12088 have a template parameter of level 2, not level 1. This
12089 would be particularly important if the member declaration
12092 template <class V = U> friend struct S1;
12094 say, when we should tsubst into `U' when instantiating
12095 S2. On the other hand, when presented with:
12105 we must find the inner binding eventually. We
12106 accomplish this by making sure that the new type we
12107 create to represent this declaration has the right
12109 context
= TYPE_CONTEXT (t
);
12115 /* If no such tag is yet defined, create a forward-reference node
12116 and record it as the "definition".
12117 When a real declaration of this type is found,
12118 the forward-reference will be altered into a real type. */
12119 if (code
== ENUMERAL_TYPE
)
12121 error ("use of enum %q#D without previous declaration", name
);
12122 return error_mark_node
;
12126 t
= make_class_type (code
);
12127 TYPE_CONTEXT (t
) = context
;
12128 if (orig_scope
== ts_lambda
)
12129 /* Remember that we're declaring a lambda to avoid bogus errors
12130 in push_template_decl. */
12131 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12132 t
= pushtag (name
, t
, scope
);
12137 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12139 if (!redeclare_class_template (t
, current_template_parms
))
12140 return error_mark_node
;
12142 else if (!processing_template_decl
12143 && CLASS_TYPE_P (t
)
12144 && CLASSTYPE_IS_TEMPLATE (t
))
12146 error ("redeclaration of %qT as a non-template", t
);
12147 error ("previous declaration %q+D", t
);
12148 return error_mark_node
;
12151 /* Make injected friend class visible. */
12152 if (scope
!= ts_within_enclosing_non_class
12153 && hidden_name_p (TYPE_NAME (t
)))
12155 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12156 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12158 if (TYPE_TEMPLATE_INFO (t
))
12160 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12161 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12169 /* Wrapper for xref_tag_1. */
12172 xref_tag (enum tag_types tag_code
, tree name
,
12173 tag_scope scope
, bool template_header_p
)
12177 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12178 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12179 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12185 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12187 enum tag_types tag_kind
;
12189 if (TREE_CODE (old
) == RECORD_TYPE
)
12190 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12192 tag_kind
= union_type
;
12194 if (id
== NULL_TREE
)
12195 id
= TYPE_IDENTIFIER (old
);
12197 return xref_tag (tag_kind
, id
, scope
, false);
12200 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12201 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12202 access_* node, and the TREE_VALUE is the type of the base-class.
12203 Non-NULL TREE_TYPE indicates virtual inheritance.
12205 Returns true if the binfo hierarchy was successfully created,
12206 false if an error was detected. */
12209 xref_basetypes (tree ref
, tree base_list
)
12212 tree binfo
, base_binfo
;
12213 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12214 unsigned max_bases
= 0; /* Maximum direct bases. */
12216 tree default_access
;
12217 tree igo_prev
; /* Track Inheritance Graph Order. */
12219 if (ref
== error_mark_node
)
12222 /* The base of a derived class is private by default, all others are
12224 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12225 && CLASSTYPE_DECLARED_CLASS (ref
)
12226 ? access_private_node
: access_public_node
);
12228 /* First, make sure that any templates in base-classes are
12229 instantiated. This ensures that if we call ourselves recursively
12230 we do not get confused about which classes are marked and which
12232 basep
= &base_list
;
12235 tree basetype
= TREE_VALUE (*basep
);
12237 /* The dependent_type_p call below should really be dependent_scope_p
12238 so that we give a hard error about using an incomplete type as a
12239 base, but we allow it with a pedwarn for backward
12241 if (processing_template_decl
12242 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12243 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12244 if (!dependent_type_p (basetype
)
12245 && !complete_type_or_else (basetype
, NULL
))
12246 /* An incomplete type. Remove it from the list. */
12247 *basep
= TREE_CHAIN (*basep
);
12251 if (TREE_TYPE (*basep
))
12253 if (CLASS_TYPE_P (basetype
))
12254 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12255 basep
= &TREE_CHAIN (*basep
);
12259 TYPE_MARKED_P (ref
) = 1;
12261 /* The binfo slot should be empty, unless this is an (ill-formed)
12263 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12265 error ("redefinition of %q#T", ref
);
12269 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12271 binfo
= make_tree_binfo (max_bases
);
12273 TYPE_BINFO (ref
) = binfo
;
12274 BINFO_OFFSET (binfo
) = size_zero_node
;
12275 BINFO_TYPE (binfo
) = ref
;
12277 /* Apply base-class info set up to the variants of this type. */
12278 fixup_type_variants (ref
);
12282 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12283 /* An aggregate cannot have baseclasses. */
12284 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12286 if (TREE_CODE (ref
) == UNION_TYPE
)
12288 error ("derived union %qT invalid", ref
);
12295 if (TYPE_FOR_JAVA (ref
))
12297 error ("Java class %qT cannot have multiple bases", ref
);
12304 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12306 if (TYPE_FOR_JAVA (ref
))
12308 error ("Java class %qT cannot have virtual bases", ref
);
12313 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12315 tree access
= TREE_PURPOSE (base_list
);
12316 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12317 tree basetype
= TREE_VALUE (base_list
);
12319 if (access
== access_default_node
)
12320 access
= default_access
;
12322 if (PACK_EXPANSION_P (basetype
))
12323 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12324 if (TREE_CODE (basetype
) == TYPE_DECL
)
12325 basetype
= TREE_TYPE (basetype
);
12326 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12328 error ("base type %qT fails to be a struct or class type",
12333 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12334 TYPE_FOR_JAVA (ref
) = 1;
12336 base_binfo
= NULL_TREE
;
12337 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12339 base_binfo
= TYPE_BINFO (basetype
);
12340 /* The original basetype could have been a typedef'd type. */
12341 basetype
= BINFO_TYPE (base_binfo
);
12343 /* Inherit flags from the base. */
12344 TYPE_HAS_NEW_OPERATOR (ref
)
12345 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12346 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12347 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12348 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12349 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12350 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12351 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12352 CLASSTYPE_REPEATED_BASE_P (ref
)
12353 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12356 /* We must do this test after we've seen through a typedef
12358 if (TYPE_MARKED_P (basetype
))
12360 if (basetype
== ref
)
12361 error ("recursive type %qT undefined", basetype
);
12363 error ("duplicate base type %qT invalid", basetype
);
12367 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12368 /* Regenerate the pack expansion for the bases. */
12369 basetype
= make_pack_expansion (basetype
);
12371 TYPE_MARKED_P (basetype
) = 1;
12373 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12374 &igo_prev
, via_virtual
);
12375 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12376 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12378 BINFO_BASE_APPEND (binfo
, base_binfo
);
12379 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12382 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12383 /* If we didn't get max_vbases vbases, we must have shared at
12384 least one of them, and are therefore diamond shaped. */
12385 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12387 /* Unmark all the types. */
12388 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12389 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12390 TYPE_MARKED_P (ref
) = 0;
12392 /* Now see if we have a repeated base type. */
12393 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12395 for (base_binfo
= binfo
; base_binfo
;
12396 base_binfo
= TREE_CHAIN (base_binfo
))
12398 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12400 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12403 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12405 for (base_binfo
= binfo
; base_binfo
;
12406 base_binfo
= TREE_CHAIN (base_binfo
))
12407 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12408 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12417 /* Copies the enum-related properties from type SRC to type DST.
12418 Used with the underlying type of an enum and the enum itself. */
12420 copy_type_enum (tree dst
, tree src
)
12423 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12425 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12426 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12427 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12428 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12429 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12430 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12431 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12432 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12433 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12437 /* Begin compiling the definition of an enumeration type.
12440 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12442 UNDERLYING_TYPE is the type that will be used as the storage for
12443 the enumeration type. This should be NULL_TREE if no storage type
12446 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12448 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12450 Returns the type object, as yet incomplete.
12451 Also records info about it so that build_enumerator
12452 may be used to declare the individual values as they are read. */
12455 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12456 bool scoped_enum_p
, bool *is_new
)
12458 tree prevtype
= NULL_TREE
;
12459 gcc_assert (identifier_p (name
));
12463 /* [C++0x dcl.enum]p5:
12465 If not explicitly specified, the underlying type of a scoped
12466 enumeration type is int. */
12467 if (!underlying_type
&& scoped_enum_p
)
12468 underlying_type
= integer_type_node
;
12470 if (underlying_type
)
12471 underlying_type
= cv_unqualified (underlying_type
);
12473 /* If this is the real definition for a previous forward reference,
12474 fill in the contents in the same object that used to be the
12475 forward reference. */
12477 enumtype
= lookup_and_check_tag (enum_type
, name
,
12478 /*tag_scope=*/ts_current
,
12479 /*template_header_p=*/false);
12481 /* In case of a template_decl, the only check that should be deferred
12482 to instantiation time is the comparison of underlying types. */
12483 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12485 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12487 error_at (input_location
, "scoped/unscoped mismatch "
12488 "in enum %q#T", enumtype
);
12489 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12490 "previous definition here");
12491 enumtype
= error_mark_node
;
12493 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12495 error_at (input_location
, "underlying type mismatch "
12496 "in enum %q#T", enumtype
);
12497 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12498 "previous definition here");
12499 enumtype
= error_mark_node
;
12501 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12502 && !dependent_type_p (underlying_type
)
12503 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12504 && !same_type_p (underlying_type
,
12505 ENUM_UNDERLYING_TYPE (enumtype
)))
12507 error_at (input_location
, "different underlying type "
12508 "in enum %q#T", enumtype
);
12509 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12510 "previous definition here");
12511 underlying_type
= NULL_TREE
;
12515 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12516 || processing_template_decl
)
12518 /* In case of error, make a dummy enum to allow parsing to
12520 if (enumtype
== error_mark_node
)
12522 name
= make_anon_name ();
12523 enumtype
= NULL_TREE
;
12526 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12527 of an opaque enum, or an opaque enum of an already defined
12528 enumeration (C++0x only).
12529 In any other case, it'll be NULL_TREE. */
12535 prevtype
= enumtype
;
12537 /* Do not push the decl more than once, unless we need to
12538 compare underlying types at instantiation time */
12540 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12541 || (underlying_type
12542 && dependent_type_p (underlying_type
))
12543 || (ENUM_UNDERLYING_TYPE (enumtype
)
12544 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12546 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12547 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12550 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12553 if (enumtype
== error_mark_node
)
12554 return error_mark_node
;
12556 /* The enum is considered opaque until the opening '{' of the
12557 enumerator list. */
12558 SET_OPAQUE_ENUM_P (enumtype
, true);
12559 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12562 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12564 if (underlying_type
)
12566 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12568 copy_type_enum (enumtype
, underlying_type
);
12569 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12571 else if (dependent_type_p (underlying_type
))
12572 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12574 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12575 underlying_type
, enumtype
);
12578 /* If into a template class, the returned enum is always the first
12579 declaration (opaque or not) seen. This way all the references to
12580 this type will be to the same declaration. The following ones are used
12581 only to check for definition errors. */
12582 if (prevtype
&& processing_template_decl
)
12588 /* After processing and defining all the values of an enumeration type,
12589 install their decls in the enumeration type.
12590 ENUMTYPE is the type object. */
12593 finish_enum_value_list (tree enumtype
)
12596 tree underlying_type
;
12599 tree minnode
, maxnode
;
12602 bool fixed_underlying_type_p
12603 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12605 /* We built up the VALUES in reverse order. */
12606 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12608 /* For an enum defined in a template, just set the type of the values;
12609 all further processing is postponed until the template is
12610 instantiated. We need to set the type so that tsubst of a CONST_DECL
12612 if (processing_template_decl
)
12614 for (values
= TYPE_VALUES (enumtype
);
12616 values
= TREE_CHAIN (values
))
12617 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12621 /* Determine the minimum and maximum values of the enumerators. */
12622 if (TYPE_VALUES (enumtype
))
12624 minnode
= maxnode
= NULL_TREE
;
12626 for (values
= TYPE_VALUES (enumtype
);
12628 values
= TREE_CHAIN (values
))
12630 decl
= TREE_VALUE (values
);
12632 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12633 each enumerator has the type of its enumeration. Prior to the
12634 closing brace, the type of each enumerator is the type of its
12635 initializing value. */
12636 TREE_TYPE (decl
) = enumtype
;
12638 /* Update the minimum and maximum values, if appropriate. */
12639 value
= DECL_INITIAL (decl
);
12640 if (value
== error_mark_node
)
12641 value
= integer_zero_node
;
12642 /* Figure out what the minimum and maximum values of the
12643 enumerators are. */
12645 minnode
= maxnode
= value
;
12646 else if (tree_int_cst_lt (maxnode
, value
))
12648 else if (tree_int_cst_lt (value
, minnode
))
12655 If the enumerator-list is empty, the underlying type is as if
12656 the enumeration had a single enumerator with value 0. */
12657 minnode
= maxnode
= integer_zero_node
;
12659 if (!fixed_underlying_type_p
)
12661 /* Compute the number of bits require to represent all values of the
12662 enumeration. We must do this before the type of MINNODE and
12663 MAXNODE are transformed, since tree_int_cst_min_precision relies
12664 on the TREE_TYPE of the value it is passed. */
12665 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12666 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12667 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12668 int precision
= MAX (lowprec
, highprec
);
12670 bool use_short_enum
;
12672 /* Determine the underlying type of the enumeration.
12676 The underlying type of an enumeration is an integral type that
12677 can represent all the enumerator values defined in the
12678 enumeration. It is implementation-defined which integral type is
12679 used as the underlying type for an enumeration except that the
12680 underlying type shall not be larger than int unless the value of
12681 an enumerator cannot fit in an int or unsigned int.
12683 We use "int" or an "unsigned int" as the underlying type, even if
12684 a smaller integral type would work, unless the user has
12685 explicitly requested that we use the smallest possible type. The
12686 user can request that for all enumerations with a command line
12687 flag, or for just one enumeration with an attribute. */
12689 use_short_enum
= flag_short_enums
12690 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12692 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12696 underlying_type
= integer_types
[itk
];
12697 if (underlying_type
!= NULL_TREE
12698 && TYPE_PRECISION (underlying_type
) >= precision
12699 && TYPE_SIGN (underlying_type
) == sgn
)
12702 if (itk
== itk_none
)
12706 IF no integral type can represent all the enumerator values, the
12707 enumeration is ill-formed. */
12708 error ("no integral type can represent all of the enumerator values "
12709 "for %qT", enumtype
);
12710 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12711 underlying_type
= integer_types
[itk_unsigned_long_long
];
12716 The value of sizeof() applied to an enumeration type, an object
12717 of an enumeration type, or an enumerator, is the value of sizeof()
12718 applied to the underlying type. */
12719 copy_type_enum (enumtype
, underlying_type
);
12721 /* Compute the minimum and maximum values for the type.
12725 For an enumeration where emin is the smallest enumerator and emax
12726 is the largest, the values of the enumeration are the values of the
12727 underlying type in the range bmin to bmax, where bmin and bmax are,
12728 respectively, the smallest and largest values of the smallest bit-
12729 field that can store emin and emax. */
12731 /* The middle-end currently assumes that types with TYPE_PRECISION
12732 narrower than their underlying type are suitably zero or sign
12733 extended to fill their mode. Similarly, it assumes that the front
12734 end assures that a value of a particular type must be within
12735 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12737 We used to set these fields based on bmin and bmax, but that led
12738 to invalid assumptions like optimizing away bounds checking. So
12739 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12740 TYPE_MAX_VALUE to the values for the mode above and only restrict
12741 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12742 ENUM_UNDERLYING_TYPE (enumtype
)
12743 = build_distinct_type_copy (underlying_type
);
12744 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12745 set_min_and_max_values_for_integral_type
12746 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12748 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12749 if (flag_strict_enums
)
12750 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12753 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12755 /* Convert each of the enumerators to the type of the underlying
12756 type of the enumeration. */
12757 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12759 location_t saved_location
;
12761 decl
= TREE_VALUE (values
);
12762 saved_location
= input_location
;
12763 input_location
= DECL_SOURCE_LOCATION (decl
);
12764 if (fixed_underlying_type_p
)
12765 /* If the enumeration type has a fixed underlying type, we
12766 already checked all of the enumerator values. */
12767 value
= DECL_INITIAL (decl
);
12769 value
= perform_implicit_conversion (underlying_type
,
12770 DECL_INITIAL (decl
),
12771 tf_warning_or_error
);
12772 input_location
= saved_location
;
12774 /* Do not clobber shared ints. */
12775 value
= copy_node (value
);
12777 TREE_TYPE (value
) = enumtype
;
12778 DECL_INITIAL (decl
) = value
;
12781 /* Fix up all variant types of this enum type. */
12782 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12783 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12785 if (at_class_scope_p ()
12786 && COMPLETE_TYPE_P (current_class_type
)
12787 && UNSCOPED_ENUM_P (enumtype
))
12788 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12789 current_class_type
);
12791 /* Finish debugging output for this type. */
12792 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12795 /* Finishes the enum type. This is called only the first time an
12796 enumeration is seen, be it opaque or odinary.
12797 ENUMTYPE is the type object. */
12800 finish_enum (tree enumtype
)
12802 if (processing_template_decl
)
12804 if (at_function_scope_p ())
12805 add_stmt (build_min (TAG_DEFN
, enumtype
));
12809 /* If this is a forward declaration, there should not be any variants,
12810 though we can get a variant in the middle of an enum-specifier with
12811 wacky code like 'enum E { e = sizeof(const E*) };' */
12812 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12813 && (TYPE_VALUES (enumtype
)
12814 || !TYPE_NEXT_VARIANT (enumtype
)));
12817 /* Build and install a CONST_DECL for an enumeration constant of the
12818 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12819 LOC is the location of NAME.
12820 Assignment of sequential values by default is handled here. */
12823 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12829 /* If the VALUE was erroneous, pretend it wasn't there; that will
12830 result in the enum being assigned the next value in sequence. */
12831 if (value
== error_mark_node
)
12834 /* Remove no-op casts from the value. */
12836 STRIP_TYPE_NOPS (value
);
12838 if (! processing_template_decl
)
12840 /* Validate and default VALUE. */
12841 if (value
!= NULL_TREE
)
12843 value
= cxx_constant_value (value
);
12845 if (TREE_CODE (value
) != INTEGER_CST
12846 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12848 error ("enumerator value for %qD is not an integer constant",
12854 /* Default based on previous value. */
12855 if (value
== NULL_TREE
)
12857 if (TYPE_VALUES (enumtype
))
12862 /* C++03 7.2/4: If no initializer is specified for the first
12863 enumerator, the type is an unspecified integral
12864 type. Otherwise the type is the same as the type of the
12865 initializing value of the preceding enumerator unless the
12866 incremented value is not representable in that type, in
12867 which case the type is an unspecified integral type
12868 sufficient to contain the incremented value. */
12869 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12870 if (error_operand_p (prev_value
))
12871 value
= error_mark_node
;
12874 tree type
= TREE_TYPE (prev_value
);
12875 signop sgn
= TYPE_SIGN (type
);
12876 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
12880 bool pos
= !wi::neg_p (wi
, sgn
);
12881 if (!wi::fits_to_tree_p (wi
, type
))
12884 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12886 type
= integer_types
[itk
];
12887 if (type
!= NULL_TREE
12888 && (pos
|| !TYPE_UNSIGNED (type
))
12889 && wi::fits_to_tree_p (wi
, type
))
12892 if (type
&& cxx_dialect
< cxx11
12893 && itk
> itk_unsigned_long
)
12894 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12895 incremented enumerator value is too large for %<unsigned long%>" : "\
12896 incremented enumerator value is too large for %<long%>");
12898 if (type
== NULL_TREE
)
12901 value
= wide_int_to_tree (type
, wi
);
12906 error ("overflow in enumeration values at %qD", name
);
12907 value
= error_mark_node
;
12912 value
= integer_zero_node
;
12915 /* Remove no-op casts from the value. */
12916 STRIP_TYPE_NOPS (value
);
12918 /* If the underlying type of the enum is fixed, check whether
12919 the enumerator values fits in the underlying type. If it
12920 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12921 if (ENUM_UNDERLYING_TYPE (enumtype
)
12923 && TREE_CODE (value
) == INTEGER_CST
)
12925 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12926 error ("enumerator value %E is outside the range of underlying "
12927 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12929 /* Convert the value to the appropriate type. */
12930 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12934 /* C++ associates enums with global, function, or class declarations. */
12935 context
= current_scope ();
12937 /* Build the actual enumeration constant. Note that the enumeration
12938 constants have the underlying type of the enum (if it is fixed)
12939 or the type of their initializer (if the underlying type of the
12940 enum is not fixed):
12944 If the underlying type is fixed, the type of each enumerator
12945 prior to the closing brace is the underlying type; if the
12946 initializing value of an enumerator cannot be represented by
12947 the underlying type, the program is ill-formed. If the
12948 underlying type is not fixed, the type of each enumerator is
12949 the type of its initializing value.
12951 If the underlying type is not fixed, it will be computed by
12952 finish_enum and we will reset the type of this enumerator. Of
12953 course, if we're processing a template, there may be no value. */
12954 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12956 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12958 DECL_CONTEXT (decl
) = enumtype
;
12959 TREE_CONSTANT (decl
) = 1;
12960 TREE_READONLY (decl
) = 1;
12961 DECL_INITIAL (decl
) = value
;
12963 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12964 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12965 on the TYPE_FIELDS list for `S'. (That's so that you can say
12966 things like `S::i' later.) */
12967 finish_member_declaration (decl
);
12971 /* Add this enumeration constant to the list for this type. */
12972 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12975 /* Look for an enumerator with the given NAME within the enumeration
12976 type ENUMTYPE. This routine is used primarily for qualified name
12977 lookup into an enumerator in C++0x, e.g.,
12979 enum class Color { Red, Green, Blue };
12981 Color color = Color::Red;
12983 Returns the value corresponding to the enumerator, or
12984 NULL_TREE if no such enumerator was found. */
12986 lookup_enumerator (tree enumtype
, tree name
)
12989 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12991 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12992 return e
? TREE_VALUE (e
) : NULL_TREE
;
12996 /* We're defining DECL. Make sure that its type is OK. */
12999 check_function_type (tree decl
, tree current_function_parms
)
13001 tree fntype
= TREE_TYPE (decl
);
13002 tree return_type
= complete_type (TREE_TYPE (fntype
));
13004 /* In a function definition, arg types must be complete. */
13005 require_complete_types_for_parms (current_function_parms
);
13007 if (dependent_type_p (return_type
)
13008 || type_uses_auto (return_type
))
13010 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13011 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13013 tree args
= TYPE_ARG_TYPES (fntype
);
13015 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13016 error ("return type %q#T is incomplete", return_type
);
13018 error ("return type has Java class type %q#T", return_type
);
13020 /* Make it return void instead. */
13021 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13022 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13024 TREE_CHAIN (args
));
13026 fntype
= build_function_type (void_type_node
, args
);
13028 = build_exception_variant (fntype
,
13029 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13030 fntype
= (cp_build_type_attribute_variant
13031 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13032 TREE_TYPE (decl
) = fntype
;
13035 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13038 /* Create the FUNCTION_DECL for a function definition.
13039 DECLSPECS and DECLARATOR are the parts of the declaration;
13040 they describe the function's name and the type it returns,
13041 but twisted together in a fashion that parallels the syntax of C.
13043 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13044 DECLARATOR is really the DECL for the function we are about to
13045 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13046 indicating that the function is an inline defined in-class.
13048 This function creates a binding context for the function body
13049 as well as setting up the FUNCTION_DECL in current_function_decl.
13051 For C++, we must first check whether that datum makes any sense.
13052 For example, "class A local_a(1,2);" means that variable local_a
13053 is an aggregate of type A, which should have a constructor
13054 applied to it with the argument list [1, 2].
13056 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13057 or may be a BLOCK if the function has been defined previously
13058 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13059 error_mark_node if the function has never been defined, or
13060 a BLOCK if the function has been defined somewhere. */
13063 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13065 tree ctype
= NULL_TREE
;
13068 int doing_friend
= 0;
13069 cp_binding_level
*bl
;
13070 tree current_function_parms
;
13071 struct c_fileinfo
*finfo
13072 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13073 bool honor_interface
;
13075 /* Sanity check. */
13076 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13077 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13079 fntype
= TREE_TYPE (decl1
);
13080 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13081 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13083 /* ISO C++ 11.4/5. A friend function defined in a class is in
13084 the (lexical) scope of the class in which it is defined. */
13085 if (!ctype
&& DECL_FRIEND_P (decl1
))
13087 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13089 /* CTYPE could be null here if we're dealing with a template;
13090 for example, `inline friend float foo()' inside a template
13091 will have no CTYPE set. */
13092 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13098 if (DECL_DECLARED_INLINE_P (decl1
)
13099 && lookup_attribute ("noinline", attrs
))
13100 warning (0, "inline function %q+D given attribute noinline", decl1
);
13102 /* Handle gnu_inline attribute. */
13103 if (GNU_INLINE_P (decl1
))
13105 DECL_EXTERNAL (decl1
) = 1;
13106 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13107 DECL_INTERFACE_KNOWN (decl1
) = 1;
13108 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13111 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13112 /* This is a constructor, we must ensure that any default args
13113 introduced by this definition are propagated to the clones
13114 now. The clones are used directly in overload resolution. */
13115 adjust_clone_args (decl1
);
13117 /* Sometimes we don't notice that a function is a static member, and
13118 build a METHOD_TYPE for it. Fix that up now. */
13119 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13120 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13122 /* Set up current_class_type, and enter the scope of the class, if
13125 push_nested_class (ctype
);
13126 else if (DECL_STATIC_FUNCTION_P (decl1
))
13127 push_nested_class (DECL_CONTEXT (decl1
));
13129 /* Now that we have entered the scope of the class, we must restore
13130 the bindings for any template parameters surrounding DECL1, if it
13131 is an inline member template. (Order is important; consider the
13132 case where a template parameter has the same name as a field of
13133 the class.) It is not until after this point that
13134 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13135 if (flags
& SF_INCLASS_INLINE
)
13136 maybe_begin_member_template_processing (decl1
);
13138 /* Effective C++ rule 15. */
13140 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13141 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13142 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13144 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13145 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13146 if (!DECL_INITIAL (decl1
))
13147 DECL_INITIAL (decl1
) = error_mark_node
;
13149 /* This function exists in static storage.
13150 (This does not mean `static' in the C sense!) */
13151 TREE_STATIC (decl1
) = 1;
13153 /* We must call push_template_decl after current_class_type is set
13154 up. (If we are processing inline definitions after exiting a
13155 class scope, current_class_type will be NULL_TREE until set above
13156 by push_nested_class.) */
13157 if (processing_template_decl
)
13159 tree newdecl1
= push_template_decl (decl1
);
13160 if (newdecl1
== error_mark_node
)
13162 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13163 pop_nested_class ();
13169 /* We are now in the scope of the function being defined. */
13170 current_function_decl
= decl1
;
13172 /* Save the parm names or decls from this function's declarator
13173 where store_parm_decls will find them. */
13174 current_function_parms
= DECL_ARGUMENTS (decl1
);
13176 /* Make sure the parameter and return types are reasonable. When
13177 you declare a function, these types can be incomplete, but they
13178 must be complete when you define the function. */
13179 check_function_type (decl1
, current_function_parms
);
13181 /* Build the return declaration for the function. */
13182 restype
= TREE_TYPE (fntype
);
13184 if (DECL_RESULT (decl1
) == NULL_TREE
)
13188 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13189 DECL_ARTIFICIAL (resdecl
) = 1;
13190 DECL_IGNORED_P (resdecl
) = 1;
13191 DECL_RESULT (decl1
) = resdecl
;
13193 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13196 /* Let the user know we're compiling this function. */
13197 announce_function (decl1
);
13199 /* Record the decl so that the function name is defined.
13200 If we already have a decl for this name, and it is a FUNCTION_DECL,
13201 use the old decl. */
13202 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13204 /* A specialization is not used to guide overload resolution. */
13205 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13206 && !(DECL_USE_TEMPLATE (decl1
) &&
13207 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13209 tree olddecl
= pushdecl (decl1
);
13211 if (olddecl
== error_mark_node
)
13212 /* If something went wrong when registering the declaration,
13213 use DECL1; we have to have a FUNCTION_DECL to use when
13214 parsing the body of the function. */
13218 /* Otherwise, OLDDECL is either a previous declaration
13219 of the same function or DECL1 itself. */
13221 if (warn_missing_declarations
13222 && olddecl
== decl1
13223 && !DECL_MAIN_P (decl1
)
13224 && TREE_PUBLIC (decl1
)
13225 && !DECL_DECLARED_INLINE_P (decl1
))
13229 /* Check whether DECL1 is in an anonymous
13231 for (context
= DECL_CONTEXT (decl1
);
13233 context
= DECL_CONTEXT (context
))
13235 if (TREE_CODE (context
) == NAMESPACE_DECL
13236 && DECL_NAME (context
) == NULL_TREE
)
13240 if (context
== NULL
)
13241 warning (OPT_Wmissing_declarations
,
13242 "no previous declaration for %q+D", decl1
);
13250 /* We need to set the DECL_CONTEXT. */
13251 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13252 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13254 fntype
= TREE_TYPE (decl1
);
13255 restype
= TREE_TYPE (fntype
);
13257 /* If #pragma weak applies, mark the decl appropriately now.
13258 The pragma only applies to global functions. Because
13259 determining whether or not the #pragma applies involves
13260 computing the mangled name for the declaration, we cannot
13261 apply the pragma until after we have merged this declaration
13262 with any previous declarations; if the original declaration
13263 has a linkage specification, that specification applies to
13264 the definition as well, and may affect the mangled name. */
13265 if (DECL_FILE_SCOPE_P (decl1
))
13266 maybe_apply_pragma_weak (decl1
);
13269 /* Reset this in case the call to pushdecl changed it. */
13270 current_function_decl
= decl1
;
13272 gcc_assert (DECL_INITIAL (decl1
));
13274 /* This function may already have been parsed, in which case just
13275 return; our caller will skip over the body without parsing. */
13276 if (DECL_INITIAL (decl1
) != error_mark_node
)
13279 /* Initialize RTL machinery. We cannot do this until
13280 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13281 even when processing a template; this is how we get
13282 CFUN set up, and our per-function variables initialized.
13283 FIXME factor out the non-RTL stuff. */
13284 bl
= current_binding_level
;
13285 allocate_struct_function (decl1
, processing_template_decl
);
13287 /* Initialize the language data structures. Whenever we start
13288 a new function, we destroy temporaries in the usual way. */
13289 cfun
->language
= ggc_alloc_cleared_language_function ();
13290 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13291 current_binding_level
= bl
;
13293 if (!processing_template_decl
&& type_uses_auto (restype
))
13295 FNDECL_USED_AUTO (decl1
) = true;
13296 current_function_auto_return_pattern
= restype
;
13299 /* Start the statement-tree, start the tree now. */
13300 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13302 /* If we are (erroneously) defining a function that we have already
13303 defined before, wipe out what we knew before. */
13304 if (!DECL_PENDING_INLINE_P (decl1
))
13305 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13307 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13309 /* We know that this was set up by `grokclassfn'. We do not
13310 wait until `store_parm_decls', since evil parse errors may
13311 never get us to that point. Here we keep the consistency
13312 between `current_class_type' and `current_class_ptr'. */
13313 tree t
= DECL_ARGUMENTS (decl1
);
13315 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13316 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13318 cp_function_chain
->x_current_class_ref
13319 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13320 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13321 cp_function_chain
->x_current_class_ptr
= t
;
13323 /* Constructors and destructors need to know whether they're "in
13324 charge" of initializing virtual base classes. */
13325 t
= DECL_CHAIN (t
);
13326 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13328 current_in_charge_parm
= t
;
13329 t
= DECL_CHAIN (t
);
13331 if (DECL_HAS_VTT_PARM_P (decl1
))
13333 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13334 current_vtt_parm
= t
;
13338 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13339 /* Implicitly-defined methods (like the
13340 destructor for a class in which no destructor
13341 is explicitly declared) must not be defined
13342 until their definition is needed. So, we
13343 ignore interface specifications for
13344 compiler-generated functions. */
13345 && !DECL_ARTIFICIAL (decl1
));
13347 if (processing_template_decl
)
13348 /* Don't mess with interface flags. */;
13349 else if (DECL_INTERFACE_KNOWN (decl1
))
13351 tree ctx
= decl_function_context (decl1
);
13353 if (DECL_NOT_REALLY_EXTERN (decl1
))
13354 DECL_EXTERNAL (decl1
) = 0;
13356 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13357 /* This is a function in a local class in an extern inline
13358 or template function. */
13359 comdat_linkage (decl1
);
13361 /* If this function belongs to an interface, it is public.
13362 If it belongs to someone else's interface, it is also external.
13363 This only affects inlines and template instantiations. */
13364 else if (!finfo
->interface_unknown
&& honor_interface
)
13366 if (DECL_DECLARED_INLINE_P (decl1
)
13367 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13369 DECL_EXTERNAL (decl1
)
13370 = (finfo
->interface_only
13371 || (DECL_DECLARED_INLINE_P (decl1
)
13372 && ! flag_implement_inlines
13373 && !DECL_VINDEX (decl1
)));
13375 /* For WIN32 we also want to put these in linkonce sections. */
13376 maybe_make_one_only (decl1
);
13379 DECL_EXTERNAL (decl1
) = 0;
13380 DECL_INTERFACE_KNOWN (decl1
) = 1;
13381 /* If this function is in an interface implemented in this file,
13382 make sure that the back end knows to emit this function
13384 if (!DECL_EXTERNAL (decl1
))
13385 mark_needed (decl1
);
13387 else if (finfo
->interface_unknown
&& finfo
->interface_only
13388 && honor_interface
)
13390 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13391 interface, we will have both finfo->interface_unknown and
13392 finfo->interface_only set. In that case, we don't want to
13393 use the normal heuristics because someone will supply a
13394 #pragma implementation elsewhere, and deducing it here would
13395 produce a conflict. */
13396 comdat_linkage (decl1
);
13397 DECL_EXTERNAL (decl1
) = 0;
13398 DECL_INTERFACE_KNOWN (decl1
) = 1;
13399 DECL_DEFER_OUTPUT (decl1
) = 1;
13403 /* This is a definition, not a reference.
13404 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13405 if (!GNU_INLINE_P (decl1
))
13406 DECL_EXTERNAL (decl1
) = 0;
13408 if ((DECL_DECLARED_INLINE_P (decl1
)
13409 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13410 && ! DECL_INTERFACE_KNOWN (decl1
))
13411 DECL_DEFER_OUTPUT (decl1
) = 1;
13413 DECL_INTERFACE_KNOWN (decl1
) = 1;
13416 /* Determine the ELF visibility attribute for the function. We must not
13417 do this before calling "pushdecl", as we must allow "duplicate_decls"
13418 to merge any attributes appropriately. We also need to wait until
13420 if (!DECL_CLONED_FUNCTION_P (decl1
))
13421 determine_visibility (decl1
);
13423 begin_scope (sk_function_parms
, decl1
);
13427 if (DECL_DESTRUCTOR_P (decl1
)
13428 || (DECL_CONSTRUCTOR_P (decl1
)
13429 && targetm
.cxx
.cdtor_returns_this ()))
13431 cdtor_label
= build_decl (input_location
,
13432 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13433 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13436 start_fname_decls ();
13438 store_parm_decls (current_function_parms
);
13444 /* Like start_preparsed_function, except that instead of a
13445 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13447 Returns true on success. If the DECLARATOR is not suitable
13448 for a function, we return false, which tells the parser to
13449 skip the entire function. */
13452 start_function (cp_decl_specifier_seq
*declspecs
,
13453 const cp_declarator
*declarator
,
13458 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13459 if (decl1
== error_mark_node
)
13461 /* If the declarator is not suitable for a function definition,
13462 cause a syntax error. */
13463 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13465 error ("invalid function declaration");
13469 if (DECL_MAIN_P (decl1
))
13470 /* main must return int. grokfndecl should have corrected it
13471 (and issued a diagnostic) if the user got it wrong. */
13472 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13473 integer_type_node
));
13475 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13478 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13482 use_eh_spec_block (tree fn
)
13484 return (flag_exceptions
&& flag_enforce_eh_specs
13485 && !processing_template_decl
13486 && !type_throw_all_p (TREE_TYPE (fn
))
13487 /* We insert the EH_SPEC_BLOCK only in the original
13488 function; then, it is copied automatically to the
13490 && !DECL_CLONED_FUNCTION_P (fn
)
13491 /* Implicitly-generated constructors and destructors have
13492 exception specifications. However, those specifications
13493 are the union of the possible exceptions specified by the
13494 constructors/destructors for bases and members, so no
13495 unallowed exception will ever reach this function. By
13496 not creating the EH_SPEC_BLOCK we save a little memory,
13497 and we avoid spurious warnings about unreachable
13499 && !DECL_DEFAULTED_FN (fn
));
13502 /* Store the parameter declarations into the current function declaration.
13503 This is called after parsing the parameter declarations, before
13504 digesting the body of the function.
13506 Also install to binding contour return value identifier, if any. */
13509 store_parm_decls (tree current_function_parms
)
13511 tree fndecl
= current_function_decl
;
13514 /* This is a chain of any other decls that came in among the parm
13515 declarations. If a parm is declared with enum {foo, bar} x;
13516 then CONST_DECLs for foo and bar are put here. */
13517 tree nonparms
= NULL_TREE
;
13519 if (current_function_parms
)
13521 /* This case is when the function was defined with an ANSI prototype.
13522 The parms already have decls, so we need not do anything here
13523 except record them as in effect
13524 and complain if any redundant old-style parm decls were written. */
13526 tree specparms
= current_function_parms
;
13529 /* Must clear this because it might contain TYPE_DECLs declared
13531 current_binding_level
->names
= NULL
;
13533 /* If we're doing semantic analysis, then we'll call pushdecl
13534 for each of these. We must do them in reverse order so that
13535 they end in the correct forward order. */
13536 specparms
= nreverse (specparms
);
13538 for (parm
= specparms
; parm
; parm
= next
)
13540 next
= DECL_CHAIN (parm
);
13541 if (TREE_CODE (parm
) == PARM_DECL
)
13543 if (DECL_NAME (parm
) == NULL_TREE
13544 || !VOID_TYPE_P (parm
))
13547 error ("parameter %qD declared void", parm
);
13551 /* If we find an enum constant or a type tag,
13552 put it aside for the moment. */
13553 TREE_CHAIN (parm
) = NULL_TREE
;
13554 nonparms
= chainon (nonparms
, parm
);
13558 /* Get the decls in their original chain order and record in the
13559 function. This is all and only the PARM_DECLs that were
13560 pushed into scope by the loop above. */
13561 DECL_ARGUMENTS (fndecl
) = getdecls ();
13564 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13566 /* Now store the final chain of decls for the arguments
13567 as the decl-chain of the current lexical scope.
13568 Put the enumerators in as well, at the front so that
13569 DECL_ARGUMENTS is not modified. */
13570 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13572 if (use_eh_spec_block (current_function_decl
))
13573 current_eh_spec_block
= begin_eh_spec_block ();
13577 /* We have finished doing semantic analysis on DECL, but have not yet
13578 generated RTL for its body. Save away our current state, so that
13579 when we want to generate RTL later we know what to do. */
13582 save_function_data (tree decl
)
13584 struct language_function
*f
;
13586 /* Save the language-specific per-function data so that we can
13587 get it back when we really expand this function. */
13588 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13591 f
= ggc_alloc_language_function ();
13592 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13593 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13595 /* Clear out the bits we don't need. */
13596 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13597 f
->bindings
= NULL
;
13598 f
->x_local_names
= NULL
;
13599 f
->base
.local_typedefs
= NULL
;
13603 /* Set the return value of the constructor (if present). */
13606 finish_constructor_body (void)
13611 if (targetm
.cxx
.cdtor_returns_this ()
13612 && (! TYPE_FOR_JAVA (current_class_type
)))
13614 /* Any return from a constructor will end up here. */
13615 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13617 val
= DECL_ARGUMENTS (current_function_decl
);
13618 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13619 DECL_RESULT (current_function_decl
), val
);
13620 /* Return the address of the object. */
13621 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13622 add_stmt (exprstmt
);
13626 /* Do all the processing for the beginning of a destructor; set up the
13627 vtable pointers and cleanups for bases and members. */
13630 begin_destructor_body (void)
13632 tree compound_stmt
;
13634 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13635 issued an error message. We still want to try to process the
13636 body of the function, but initialize_vtbl_ptrs will crash if
13637 TYPE_BINFO is NULL. */
13638 if (COMPLETE_TYPE_P (current_class_type
))
13640 compound_stmt
= begin_compound_stmt (0);
13641 /* Make all virtual function table pointers in non-virtual base
13642 classes point to CURRENT_CLASS_TYPE's virtual function
13644 initialize_vtbl_ptrs (current_class_ptr
);
13645 finish_compound_stmt (compound_stmt
);
13647 /* Insert a cleanup to let the back end know that the object is dead
13648 when we exit the destructor, either normally or via exception. */
13649 tree clobber
= build_constructor (current_class_type
, NULL
);
13650 TREE_THIS_VOLATILE (clobber
) = true;
13651 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13652 current_class_ref
, clobber
);
13653 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13655 /* And insert cleanups for our bases and members so that they
13656 will be properly destroyed if we throw. */
13657 push_base_cleanups ();
13661 /* At the end of every destructor we generate code to delete the object if
13662 necessary. Do that now. */
13665 finish_destructor_body (void)
13669 /* Any return from a destructor will end up here; that way all base
13670 and member cleanups will be run when the function returns. */
13671 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13673 /* In a virtual destructor, we must call delete. */
13674 if (DECL_VIRTUAL_P (current_function_decl
))
13677 tree virtual_size
= cxx_sizeof (current_class_type
);
13681 At the point of definition of a virtual destructor (including
13682 an implicit definition), non-placement operator delete shall
13683 be looked up in the scope of the destructor's class and if
13684 found shall be accessible and unambiguous. */
13685 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13687 /*global_p=*/false,
13688 /*placement=*/NULL_TREE
,
13689 /*alloc_fn=*/NULL_TREE
,
13690 tf_warning_or_error
);
13692 if_stmt
= begin_if_stmt ();
13693 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13694 current_in_charge_parm
,
13697 finish_expr_stmt (exprstmt
);
13698 finish_then_clause (if_stmt
);
13699 finish_if_stmt (if_stmt
);
13702 if (targetm
.cxx
.cdtor_returns_this ())
13706 val
= DECL_ARGUMENTS (current_function_decl
);
13707 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13708 DECL_RESULT (current_function_decl
), val
);
13709 /* Return the address of the object. */
13710 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13711 add_stmt (exprstmt
);
13715 /* Do the necessary processing for the beginning of a function body, which
13716 in this case includes member-initializers, but not the catch clauses of
13717 a function-try-block. Currently, this means opening a binding level
13718 for the member-initializers (in a ctor), member cleanups (in a dtor),
13719 and capture proxies (in a lambda operator()). */
13722 begin_function_body (void)
13726 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13729 if (processing_template_decl
)
13730 /* Do nothing now. */;
13732 /* Always keep the BLOCK node associated with the outermost pair of
13733 curly braces of a function. These are needed for correct
13734 operation of dwarfout.c. */
13735 keep_next_level (true);
13737 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13739 if (processing_template_decl
)
13740 /* Do nothing now. */;
13741 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13742 begin_destructor_body ();
13747 /* Do the processing for the end of a function body. Currently, this means
13748 closing out the cleanups for fully-constructed bases and members, and in
13749 the case of the destructor, deleting the object if desired. Again, this
13750 is only meaningful for [cd]tors, since they are the only functions where
13751 there is a significant distinction between the main body and any
13752 function catch clauses. Handling, say, main() return semantics here
13753 would be wrong, as flowing off the end of a function catch clause for
13754 main() would also need to return 0. */
13757 finish_function_body (tree compstmt
)
13759 if (compstmt
== NULL_TREE
)
13762 /* Close the block. */
13763 finish_compound_stmt (compstmt
);
13765 if (processing_template_decl
)
13766 /* Do nothing now. */;
13767 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13768 finish_constructor_body ();
13769 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13770 finish_destructor_body ();
13773 /* Given a function, returns the BLOCK corresponding to the outermost level
13774 of curly braces, skipping the artificial block created for constructor
13778 outer_curly_brace_block (tree fndecl
)
13780 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13781 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13782 /* Skip the artificial function body block. */
13783 block
= BLOCK_SUBBLOCKS (block
);
13787 /* If FNDECL is a class's key method, add the class to the list of
13788 keyed classes that should be emitted. */
13791 record_key_method_defined (tree fndecl
)
13793 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13794 && DECL_VIRTUAL_P (fndecl
)
13795 && !processing_template_decl
)
13797 tree fnclass
= DECL_CONTEXT (fndecl
);
13798 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13799 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13803 /* Subroutine of finish_function.
13804 Save the body of constexpr functions for possible
13805 future compile time evaluation. */
13808 maybe_save_function_definition (tree fun
)
13810 if (!processing_template_decl
13811 && DECL_DECLARED_CONSTEXPR_P (fun
)
13812 && !DECL_CLONED_FUNCTION_P (fun
))
13813 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13816 /* Finish up a function declaration and compile that function
13817 all the way to assembler language output. The free the storage
13818 for the function definition.
13820 FLAGS is a bitwise or of the following values:
13822 We just finished processing the body of an in-class inline
13823 function definition. (This processing will have taken place
13824 after the class definition is complete.) */
13827 finish_function (int flags
)
13829 tree fndecl
= current_function_decl
;
13830 tree fntype
, ctype
= NULL_TREE
;
13831 int inclass_inline
= (flags
& 2) != 0;
13833 /* When we get some parse errors, we can end up without a
13834 current_function_decl, so cope. */
13835 if (fndecl
== NULL_TREE
)
13836 return error_mark_node
;
13838 if (c_dialect_objc ())
13839 objc_finish_function ();
13841 gcc_assert (!defer_mark_used_calls
);
13842 defer_mark_used_calls
= true;
13844 record_key_method_defined (fndecl
);
13846 fntype
= TREE_TYPE (fndecl
);
13848 /* TREE_READONLY (fndecl) = 1;
13849 This caused &foo to be of type ptr-to-const-function
13850 which then got a warning when stored in a ptr-to-function variable. */
13852 gcc_assert (building_stmt_list_p ());
13853 /* The current function is being defined, so its DECL_INITIAL should
13854 be set, and unless there's a multiple definition, it should be
13855 error_mark_node. */
13856 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13858 /* For a cloned function, we've already got all the code we need;
13859 there's no need to add any extra bits. */
13860 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13862 /* Make it so that `main' always returns 0 by default. */
13863 if (DECL_MAIN_P (current_function_decl
))
13864 finish_return_stmt (integer_zero_node
);
13866 if (use_eh_spec_block (current_function_decl
))
13867 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13868 (TREE_TYPE (current_function_decl
)),
13869 current_eh_spec_block
);
13872 /* If we're saving up tree structure, tie off the function now. */
13873 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13875 finish_fname_decls ();
13877 /* If this function can't throw any exceptions, remember that. */
13878 if (!processing_template_decl
13879 && !cp_function_chain
->can_throw
13880 && !flag_non_call_exceptions
13881 && !decl_replaceable_p (fndecl
))
13882 TREE_NOTHROW (fndecl
) = 1;
13884 /* This must come after expand_function_end because cleanups might
13885 have declarations (from inline functions) that need to go into
13886 this function's blocks. */
13888 /* If the current binding level isn't the outermost binding level
13889 for this function, either there is a bug, or we have experienced
13890 syntax errors and the statement tree is malformed. */
13891 if (current_binding_level
->kind
!= sk_function_parms
)
13893 /* Make sure we have already experienced errors. */
13894 gcc_assert (errorcount
);
13896 /* Throw away the broken statement tree and extra binding
13898 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13900 while (current_binding_level
->kind
!= sk_function_parms
)
13902 if (current_binding_level
->kind
== sk_class
)
13903 pop_nested_class ();
13905 poplevel (0, 0, 0);
13908 poplevel (1, 0, 1);
13910 /* Statements should always be full-expressions at the outermost set
13911 of curly braces for a function. */
13912 gcc_assert (stmts_are_full_exprs_p ());
13914 /* If there are no return statements in a function with auto return type,
13915 the return type is void. But if the declared type is something like
13916 auto*, this is an error. */
13917 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13918 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13920 if (!is_auto (current_function_auto_return_pattern
)
13921 && !current_function_returns_value
&& !current_function_returns_null
)
13923 error ("no return statements in function returning %qT",
13924 current_function_auto_return_pattern
);
13925 inform (input_location
, "only plain %<auto%> return type can be "
13926 "deduced to %<void%>");
13928 apply_deduced_return_type (fndecl
, void_type_node
);
13929 fntype
= TREE_TYPE (fndecl
);
13932 /* Save constexpr function body before it gets munged by
13933 the NRV transformation. */
13934 maybe_save_function_definition (fndecl
);
13936 /* Set up the named return value optimization, if we can. Candidate
13937 variables are selected in check_return_expr. */
13938 if (current_function_return_value
)
13940 tree r
= current_function_return_value
;
13943 if (r
!= error_mark_node
13944 /* This is only worth doing for fns that return in memory--and
13945 simpler, since we don't have to worry about promoted modes. */
13946 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13947 /* Only allow this for variables declared in the outer scope of
13948 the function so we know that their lifetime always ends with a
13949 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13950 we were to do this optimization in tree-ssa. */
13951 && (outer
= outer_curly_brace_block (fndecl
))
13952 && chain_member (r
, BLOCK_VARS (outer
)))
13953 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13955 current_function_return_value
= NULL_TREE
;
13958 /* Remember that we were in class scope. */
13959 if (current_class_name
)
13960 ctype
= current_class_type
;
13962 /* Must mark the RESULT_DECL as being in this function. */
13963 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13965 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13966 to the FUNCTION_DECL node itself. */
13967 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13969 /* Save away current state, if appropriate. */
13970 if (!processing_template_decl
)
13971 save_function_data (fndecl
);
13973 /* Complain if there's just no return statement. */
13974 if (warn_return_type
13975 && !VOID_TYPE_P (TREE_TYPE (fntype
))
13976 && !dependent_type_p (TREE_TYPE (fntype
))
13977 && !current_function_returns_value
&& !current_function_returns_null
13978 /* Don't complain if we abort or throw. */
13979 && !current_function_returns_abnormally
13980 /* Don't complain if we are declared noreturn. */
13981 && !TREE_THIS_VOLATILE (fndecl
)
13982 && !DECL_NAME (DECL_RESULT (fndecl
))
13983 && !TREE_NO_WARNING (fndecl
)
13984 /* Structor return values (if any) are set by the compiler. */
13985 && !DECL_CONSTRUCTOR_P (fndecl
)
13986 && !DECL_DESTRUCTOR_P (fndecl
)
13987 && targetm
.warn_func_return (fndecl
))
13989 warning (OPT_Wreturn_type
,
13990 "no return statement in function returning non-void");
13991 TREE_NO_WARNING (fndecl
) = 1;
13994 /* Store the end of the function, so that we get good line number
13995 info for the epilogue. */
13996 cfun
->function_end_locus
= input_location
;
13998 /* Complain about parameters that are only set, but never otherwise used. */
13999 if (warn_unused_but_set_parameter
14000 && !processing_template_decl
14001 && errorcount
== unused_but_set_errorcount
14002 && !DECL_CLONED_FUNCTION_P (fndecl
))
14006 for (decl
= DECL_ARGUMENTS (fndecl
);
14008 decl
= DECL_CHAIN (decl
))
14009 if (TREE_USED (decl
)
14010 && TREE_CODE (decl
) == PARM_DECL
14011 && !DECL_READ_P (decl
)
14012 && DECL_NAME (decl
)
14013 && !DECL_ARTIFICIAL (decl
)
14014 && !TREE_NO_WARNING (decl
)
14015 && !DECL_IN_SYSTEM_HEADER (decl
)
14016 && TREE_TYPE (decl
) != error_mark_node
14017 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14018 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14019 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14020 warning (OPT_Wunused_but_set_parameter
,
14021 "parameter %q+D set but not used", decl
);
14022 unused_but_set_errorcount
= errorcount
;
14025 /* Complain about locally defined typedefs that are not used in this
14027 maybe_warn_unused_local_typedefs ();
14029 /* Genericize before inlining. */
14030 if (!processing_template_decl
)
14032 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14033 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14034 cp_genericize (fndecl
);
14035 /* Clear out the bits we don't need. */
14036 f
->x_current_class_ptr
= NULL
;
14037 f
->x_current_class_ref
= NULL
;
14038 f
->x_eh_spec_block
= NULL
;
14039 f
->x_in_charge_parm
= NULL
;
14040 f
->x_vtt_parm
= NULL
;
14041 f
->x_return_value
= NULL
;
14042 f
->bindings
= NULL
;
14043 f
->extern_decl_map
= NULL
;
14045 /* Clear out the bits we don't need. */
14046 local_names
= NULL
;
14048 /* We're leaving the context of this function, so zap cfun. It's still in
14049 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14051 current_function_decl
= NULL
;
14053 /* If this is an in-class inline definition, we may have to pop the
14054 bindings for the template parameters that we added in
14055 maybe_begin_member_template_processing when start_function was
14057 if (inclass_inline
)
14058 maybe_end_member_template_processing ();
14060 /* Leave the scope of the class. */
14062 pop_nested_class ();
14067 current_function_decl
= NULL_TREE
;
14069 defer_mark_used_calls
= false;
14070 if (deferred_mark_used_calls
)
14075 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14077 vec_free (deferred_mark_used_calls
);
14083 /* Create the FUNCTION_DECL for a function definition.
14084 DECLSPECS and DECLARATOR are the parts of the declaration;
14085 they describe the return type and the name of the function,
14086 but twisted together in a fashion that parallels the syntax of C.
14088 This function creates a binding context for the function body
14089 as well as setting up the FUNCTION_DECL in current_function_decl.
14091 Returns a FUNCTION_DECL on success.
14093 If the DECLARATOR is not suitable for a function (it defines a datum
14094 instead), we return 0, which tells yyparse to report a parse error.
14096 May return void_type_node indicating that this method is actually
14097 a friend. See grokfield for more details.
14099 Came here with a `.pushlevel' .
14101 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14102 CHANGES TO CODE IN `grokfield'. */
14105 grokmethod (cp_decl_specifier_seq
*declspecs
,
14106 const cp_declarator
*declarator
, tree attrlist
)
14108 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14111 if (fndecl
== error_mark_node
)
14112 return error_mark_node
;
14114 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14116 error ("invalid member function declaration");
14117 return error_mark_node
;
14121 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14123 /* Pass friends other than inline friend functions back. */
14124 if (fndecl
== void_type_node
)
14127 if (DECL_IN_AGGR_P (fndecl
))
14129 if (DECL_CLASS_SCOPE_P (fndecl
))
14130 error ("%qD is already defined in class %qT", fndecl
,
14131 DECL_CONTEXT (fndecl
));
14132 return error_mark_node
;
14135 check_template_shadow (fndecl
);
14137 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14138 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14140 /* We process method specializations in finish_struct_1. */
14141 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14143 fndecl
= push_template_decl (fndecl
);
14144 if (fndecl
== error_mark_node
)
14148 if (! DECL_FRIEND_P (fndecl
))
14150 if (DECL_CHAIN (fndecl
))
14152 fndecl
= copy_node (fndecl
);
14153 TREE_CHAIN (fndecl
) = NULL_TREE
;
14157 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14159 DECL_IN_AGGR_P (fndecl
) = 1;
14164 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14165 we can lay it out later, when and if its type becomes complete.
14167 Also handle constexpr pointer to member variables where the initializer
14168 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14171 maybe_register_incomplete_var (tree var
)
14173 gcc_assert (VAR_P (var
));
14175 /* Keep track of variables with incomplete types. */
14176 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14177 && DECL_EXTERNAL (var
))
14179 tree inner_type
= TREE_TYPE (var
);
14181 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14182 inner_type
= TREE_TYPE (inner_type
);
14183 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14185 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14186 /* RTTI TD entries are created while defining the type_info. */
14187 || (TYPE_LANG_SPECIFIC (inner_type
)
14188 && TYPE_BEING_DEFINED (inner_type
)))
14190 incomplete_var iv
= {var
, inner_type
};
14191 vec_safe_push (incomplete_vars
, iv
);
14193 else if (TYPE_PTRMEM_P (inner_type
)
14194 && DECL_INITIAL (var
)
14195 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14197 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14198 gcc_assert (TYPE_BEING_DEFINED (context
));
14199 incomplete_var iv
= {var
, context
};
14200 vec_safe_push (incomplete_vars
, iv
);
14205 /* Called when a class type (given by TYPE) is defined. If there are
14206 any existing VAR_DECLs whose type has been completed by this
14207 declaration, update them now. */
14210 complete_vars (tree type
)
14213 incomplete_var
*iv
;
14215 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14217 if (same_type_p (type
, iv
->incomplete_type
))
14219 tree var
= iv
->decl
;
14220 tree type
= TREE_TYPE (var
);
14222 if (TYPE_PTRMEM_P (type
))
14223 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14226 /* Complete the type of the variable. The VAR_DECL itself
14227 will be laid out in expand_expr. */
14228 complete_type (type
);
14229 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14232 /* Remove this entry from the list. */
14233 incomplete_vars
->unordered_remove (ix
);
14239 /* Check for pending declarations which may have abstract type. */
14240 complete_type_check_abstract (type
);
14243 /* If DECL is of a type which needs a cleanup, build and return an
14244 expression to perform that cleanup here. Return NULL_TREE if no
14245 cleanup need be done. */
14248 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14254 /* Assume no cleanup is required. */
14255 cleanup
= NULL_TREE
;
14257 if (error_operand_p (decl
))
14260 /* Handle "__attribute__((cleanup))". We run the cleanup function
14261 before the destructor since the destructor is what actually
14262 terminates the lifetime of the object. */
14263 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14270 /* Get the name specified by the user for the cleanup function. */
14271 id
= TREE_VALUE (TREE_VALUE (attr
));
14272 /* Look up the name to find the cleanup function to call. It is
14273 important to use lookup_name here because that is what is
14274 used in c-common.c:handle_cleanup_attribute when performing
14275 initial checks on the attribute. Note that those checks
14276 include ensuring that the function found is not an overloaded
14277 function, or an object with an overloaded call operator,
14278 etc.; we can rely on the fact that the function found is an
14279 ordinary FUNCTION_DECL. */
14280 fn
= lookup_name (id
);
14281 arg
= build_address (decl
);
14283 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14284 if (cleanup
== error_mark_node
)
14285 return error_mark_node
;
14287 /* Handle ordinary C++ destructors. */
14288 type
= TREE_TYPE (decl
);
14289 if (type_build_dtor_call (type
))
14291 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14295 if (TREE_CODE (type
) == ARRAY_TYPE
)
14298 addr
= build_address (decl
);
14300 call
= build_delete (TREE_TYPE (addr
), addr
,
14301 sfk_complete_destructor
, flags
, 0, complain
);
14302 if (call
== error_mark_node
)
14303 cleanup
= error_mark_node
;
14304 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14305 /* Discard the call. */;
14307 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14312 /* build_delete sets the location of the destructor call to the
14313 current location, even though the destructor is going to be
14314 called later, at the end of the current scope. This can lead to
14315 a "jumpy" behaviour for users of debuggers when they step around
14316 the end of the block. So let's unset the location of the
14317 destructor call instead. */
14318 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14319 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14324 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14325 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14326 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14329 static_fn_type (tree memfntype
)
14334 if (TYPE_PTRMEMFUNC_P (memfntype
))
14335 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14336 if (POINTER_TYPE_P (memfntype
)
14337 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14338 memfntype
= TREE_TYPE (memfntype
);
14339 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14341 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14342 args
= TYPE_ARG_TYPES (memfntype
);
14343 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14344 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14345 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14346 fntype
= (cp_build_type_attribute_variant
14347 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14348 fntype
= (build_exception_variant
14349 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14353 /* DECL was originally constructed as a non-static member function,
14354 but turned out to be static. Update it accordingly. */
14357 revert_static_member_fn (tree decl
)
14359 tree stype
= static_fn_type (decl
);
14360 cp_cv_quals quals
= type_memfn_quals (stype
);
14361 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14363 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14364 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14366 TREE_TYPE (decl
) = stype
;
14368 if (DECL_ARGUMENTS (decl
))
14369 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14370 DECL_STATIC_FUNCTION_P (decl
) = 1;
14373 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14374 one of the language-independent trees. */
14376 enum cp_tree_node_structure_enum
14377 cp_tree_node_structure (union lang_tree_node
* t
)
14379 switch (TREE_CODE (&t
->generic
))
14381 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14382 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14383 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14384 case OVERLOAD
: return TS_CP_OVERLOAD
;
14385 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14386 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14387 case BASELINK
: return TS_CP_BASELINK
;
14388 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14389 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14390 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14391 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14392 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14393 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14394 default: return TS_CP_GENERIC
;
14398 /* Build the void_list_node (void_type_node having been created). */
14400 build_void_list_node (void)
14402 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14407 cp_missing_noreturn_ok_p (tree decl
)
14409 /* A missing noreturn is ok for the `main' function. */
14410 return DECL_MAIN_P (decl
);
14413 /* Return the COMDAT group into which DECL should be placed. */
14416 cxx_comdat_group (tree decl
)
14420 /* Virtual tables, construction virtual tables, and virtual table
14421 tables all go in a single COMDAT group, named after the primary
14423 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14424 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14425 /* For all other DECLs, the COMDAT group is the mangled name of the
14426 declaration itself. */
14429 while (DECL_THUNK_P (decl
))
14431 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14432 into the same section as the target function. In that case
14433 we must return target's name. */
14434 tree target
= THUNK_TARGET (decl
);
14435 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14436 && DECL_SECTION_NAME (target
) != NULL
14437 && DECL_ONE_ONLY (target
))
14442 name
= DECL_ASSEMBLER_NAME (decl
);
14448 /* Returns the return type for FN as written by the user, which may include
14449 a placeholder for a deduced return type. */
14452 fndecl_declared_return_type (tree fn
)
14454 fn
= STRIP_TEMPLATE (fn
);
14455 if (FNDECL_USED_AUTO (fn
))
14457 struct language_function
*f
= NULL
;
14458 if (DECL_STRUCT_FUNCTION (fn
))
14459 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14461 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14462 return f
->x_auto_return_pattern
;
14464 return TREE_TYPE (TREE_TYPE (fn
));
14467 /* Returns true iff DECL was declared with an auto return type and it has
14468 not yet been deduced to a real type. */
14471 undeduced_auto_decl (tree decl
)
14473 if (cxx_dialect
< cxx1y
)
14475 return type_uses_auto (TREE_TYPE (decl
));
14478 /* Complain if DECL has an undeduced return type. */
14481 require_deduced_type (tree decl
)
14483 if (undeduced_auto_decl (decl
))
14484 error ("use of %qD before deduction of %<auto%>", decl
);
14487 #include "gt-cp-decl.h"