1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2014 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"
66 /* Possible cases of bad specifiers type used by bad_specifiers. */
68 BSP_VAR
, /* variable */
69 BSP_PARM
, /* parameter */
74 static tree
grokparms (tree parmlist
, tree
*);
75 static const char *redeclaration_error_message (tree
, tree
);
77 static int decl_jump_unsafe (tree
);
78 static void require_complete_types_for_parms (tree
);
79 static int ambi_op_p (enum tree_code
);
80 static int unary_op_p (enum tree_code
);
81 static void push_local_name (tree
);
82 static tree
grok_reference_init (tree
, tree
, tree
, int);
83 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
85 static int check_static_variable_definition (tree
, tree
);
86 static void record_unknown_type (tree
, const char *);
87 static tree
builtin_function_1 (tree
, tree
, bool);
88 static int member_function_or_else (tree
, tree
, enum overload_flags
);
89 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
91 static void check_for_uninitialized_const_var (tree
);
92 static hashval_t
typename_hash (const void *);
93 static int typename_compare (const void *, const void *);
94 static tree
local_variable_p_walkfn (tree
*, int *, void *);
95 static tree
record_builtin_java_type (const char *, int);
96 static const char *tag_name (enum tag_types
);
97 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
98 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
99 static void maybe_deduce_size_from_array_init (tree
, tree
);
100 static void layout_var_decl (tree
);
101 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
102 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
103 static void save_function_data (tree
);
104 static void copy_type_enum (tree
, tree
);
105 static void check_function_type (tree
, tree
);
106 static void finish_constructor_body (void);
107 static void begin_destructor_body (void);
108 static void finish_destructor_body (void);
109 static void record_key_method_defined (tree
);
110 static tree
create_array_type_for_decl (tree
, tree
, tree
);
111 static tree
get_atexit_node (void);
112 static tree
get_dso_handle_node (void);
113 static tree
start_cleanup_fn (void);
114 static void end_cleanup_fn (void);
115 static tree
cp_make_fname_decl (location_t
, tree
, int);
116 static void initialize_predefined_identifiers (void);
117 static tree check_special_function_return_type
118 (special_function_kind
, tree
, tree
);
119 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
120 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
121 static void store_parm_decls (tree
);
122 static void initialize_local_var (tree
, tree
);
123 static void expand_static_init (tree
, tree
);
125 /* The following symbols are subsumed in the cp_global_trees array, and
126 listed here individually for documentation purposes.
129 tree wchar_decl_node;
131 tree vtable_entry_type;
132 tree delta_type_node;
133 tree __t_desc_type_node;
135 tree class_type_node;
136 tree unknown_type_node;
138 Array type `vtable_entry_type[]'
141 tree vtbl_ptr_type_node;
148 A FUNCTION_DECL which can call `abort'. Not necessarily the
149 one that the user will declare, but sufficient to be called
150 by routines that want to abort the program.
154 The FUNCTION_DECL for the default `::operator delete'.
156 tree global_delete_fndecl;
159 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
160 tree tinfo_var_id; */
162 tree cp_global_trees
[CPTI_MAX
];
164 /* Indicates that there is a type value in some namespace, although
165 that is not necessarily in scope at the moment. */
167 tree global_type_node
;
169 /* The node that holds the "name" of the global scope. */
170 tree global_scope_name
;
172 #define local_names cp_function_chain->x_local_names
174 /* A list of objects which have constructors or destructors
175 which reside in the global scope. The decl is stored in
176 the TREE_VALUE slot and the initializer is stored
177 in the TREE_PURPOSE slot. */
178 tree static_aggregates
;
180 /* Like static_aggregates, but for thread_local variables. */
185 /* A node for the integer constant 2. */
187 tree integer_two_node
;
189 /* Used only for jumps to as-yet undefined labels, since jumps to
190 defined labels can have their validity checked immediately. */
192 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
193 struct named_label_use_entry
*next
;
194 /* The binding level to which this entry is *currently* attached.
195 This is initially the binding level in which the goto appeared,
196 but is modified as scopes are closed. */
197 cp_binding_level
*binding_level
;
198 /* The head of the names list that was current when the goto appeared,
199 or the inner scope popped. These are the decls that will *not* be
200 skipped when jumping to the label. */
202 /* The location of the goto, for error reporting. */
203 location_t o_goto_locus
;
204 /* True if an OpenMP structured block scope has been closed since
205 the goto appeared. This means that the branch from the label will
206 illegally exit an OpenMP scope. */
210 /* A list of all LABEL_DECLs in the function that have names. Here so
211 we can clear out their names' definitions at the end of the
212 function, and so we can check the validity of jumps to these labels. */
214 struct GTY(()) named_label_entry
{
215 /* The decl itself. */
218 /* The binding level to which the label is *currently* attached.
219 This is initially set to the binding level in which the label
220 is defined, but is modified as scopes are closed. */
221 cp_binding_level
*binding_level
;
222 /* The head of the names list that was current when the label was
223 defined, or the inner scope popped. These are the decls that will
224 be skipped when jumping to the label. */
226 /* A vector of all decls from all binding levels that would be
227 crossed by a backward branch to the label. */
228 vec
<tree
, va_gc
> *bad_decls
;
230 /* A list of uses of the label, before the label is defined. */
231 struct named_label_use_entry
*uses
;
233 /* The following bits are set after the label is defined, and are
234 updated as scopes are popped. They indicate that a backward jump
235 to the label will illegally enter a scope of the given flavor. */
241 #define named_labels cp_function_chain->x_named_labels
243 /* The number of function bodies which we are currently processing.
244 (Zero if we are at namespace scope, one inside the body of a
245 function, two inside the body of a function in a local class, etc.) */
248 /* To avoid unwanted recursion, finish_function defers all mark_used calls
249 encountered during its execution until it finishes. */
250 bool defer_mark_used_calls
;
251 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
253 /* States indicating how grokdeclarator() should handle declspecs marked
254 with __attribute__((deprecated)). An object declared as
255 __attribute__((deprecated)) suppresses warnings of uses of other
257 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
260 /* A list of VAR_DECLs whose type was incomplete at the time the
261 variable was declared. */
263 typedef struct GTY(()) incomplete_var_d
{
265 tree incomplete_type
;
269 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
271 /* Returns the kind of template specialization we are currently
272 processing, given that it's declaration contained N_CLASS_SCOPES
273 explicit scope qualifications. */
276 current_tmpl_spec_kind (int n_class_scopes
)
278 int n_template_parm_scopes
= 0;
279 int seen_specialization_p
= 0;
280 int innermost_specialization_p
= 0;
283 /* Scan through the template parameter scopes. */
284 for (b
= current_binding_level
;
285 b
->kind
== sk_template_parms
;
288 /* If we see a specialization scope inside a parameter scope,
289 then something is wrong. That corresponds to a declaration
292 template <class T> template <> ...
294 which is always invalid since [temp.expl.spec] forbids the
295 specialization of a class member template if the enclosing
296 class templates are not explicitly specialized as well. */
297 if (b
->explicit_spec_p
)
299 if (n_template_parm_scopes
== 0)
300 innermost_specialization_p
= 1;
302 seen_specialization_p
= 1;
304 else if (seen_specialization_p
== 1)
305 return tsk_invalid_member_spec
;
307 ++n_template_parm_scopes
;
310 /* Handle explicit instantiations. */
311 if (processing_explicit_instantiation
)
313 if (n_template_parm_scopes
!= 0)
314 /* We've seen a template parameter list during an explicit
315 instantiation. For example:
317 template <class T> template void f(int);
319 This is erroneous. */
320 return tsk_invalid_expl_inst
;
322 return tsk_expl_inst
;
325 if (n_template_parm_scopes
< n_class_scopes
)
326 /* We've not seen enough template headers to match all the
327 specialized classes present. For example:
329 template <class T> void R<T>::S<T>::f(int);
331 This is invalid; there needs to be one set of template
332 parameters for each class. */
333 return tsk_insufficient_parms
;
334 else if (n_template_parm_scopes
== n_class_scopes
)
335 /* We're processing a non-template declaration (even though it may
336 be a member of a template class.) For example:
338 template <class T> void S<T>::f(int);
340 The `class T' matches the `S<T>', leaving no template headers
341 corresponding to the `f'. */
343 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
344 /* We've got too many template headers. For example:
346 template <> template <class T> void f (T);
348 There need to be more enclosing classes. */
349 return tsk_excessive_parms
;
351 /* This must be a template. It's of the form:
353 template <class T> template <class U> void S<T>::f(U);
355 This is a specialization if the innermost level was a
356 specialization; otherwise it's just a definition of the
358 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
361 /* Exit the current scope. */
369 /* When a label goes out of scope, check to see if that label was used
370 in a valid manner, and issue any appropriate warnings or errors. */
373 pop_label (tree label
, tree old_value
)
375 if (!processing_template_decl
)
377 if (DECL_INITIAL (label
) == NULL_TREE
)
381 error ("label %q+D used but not defined", label
);
382 location
= input_location
;
383 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
384 /* Avoid crashing later. */
385 define_label (location
, DECL_NAME (label
));
388 warn_for_unused_label (label
);
391 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
394 /* At the end of a function, all labels declared within the function
395 go out of scope. BLOCK is the top-level block for the
399 pop_labels_1 (void **slot
, void *data
)
401 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
402 tree block
= (tree
) data
;
404 pop_label (ent
->label_decl
, NULL_TREE
);
406 /* Put the labels into the "variables" of the top-level block,
407 so debugger can see them. */
408 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
409 BLOCK_VARS (block
) = ent
->label_decl
;
411 htab_clear_slot (named_labels
, slot
);
417 pop_labels (tree block
)
421 htab_traverse (named_labels
, pop_labels_1
, block
);
426 /* At the end of a block with local labels, restore the outer definition. */
429 pop_local_label (tree label
, tree old_value
)
431 struct named_label_entry dummy
;
434 pop_label (label
, old_value
);
436 dummy
.label_decl
= label
;
437 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
438 htab_clear_slot (named_labels
, slot
);
441 /* The following two routines are used to interface to Objective-C++.
442 The binding level is purposely treated as an opaque type. */
445 objc_get_current_scope (void)
447 return current_binding_level
;
450 /* The following routine is used by the NeXT-style SJLJ exceptions;
451 variables get marked 'volatile' so as to not be clobbered by
452 _setjmp()/_longjmp() calls. All variables in the current scope,
453 as well as parent scopes up to (but not including) ENCLOSING_BLK
454 shall be thusly marked. */
457 objc_mark_locals_volatile (void *enclosing_blk
)
459 cp_binding_level
*scope
;
461 for (scope
= current_binding_level
;
462 scope
&& scope
!= enclosing_blk
;
463 scope
= scope
->level_chain
)
467 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
468 objc_volatilize_decl (decl
);
470 /* Do not climb up past the current function. */
471 if (scope
->kind
== sk_function_parms
)
476 /* Update data for defined and undefined labels when leaving a scope. */
479 poplevel_named_label_1 (void **slot
, void *data
)
481 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
482 cp_binding_level
*bl
= (cp_binding_level
*) data
;
483 cp_binding_level
*obl
= bl
->level_chain
;
485 if (ent
->binding_level
== bl
)
489 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
490 TREE_LISTs representing OVERLOADs, so be careful. */
491 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
493 : TREE_CHAIN (decl
)))
494 if (decl_jump_unsafe (decl
))
495 vec_safe_push (ent
->bad_decls
, decl
);
497 ent
->binding_level
= obl
;
498 ent
->names_in_scope
= obl
->names
;
502 ent
->in_try_scope
= true;
505 ent
->in_catch_scope
= true;
508 ent
->in_omp_scope
= true;
516 struct named_label_use_entry
*use
;
518 for (use
= ent
->uses
; use
; use
= use
->next
)
519 if (use
->binding_level
== bl
)
521 use
->binding_level
= obl
;
522 use
->names_in_scope
= obl
->names
;
523 if (bl
->kind
== sk_omp
)
524 use
->in_omp_scope
= true;
531 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
532 when errors were reported, except for -Werror-unused-but-set-*. */
533 static int unused_but_set_errorcount
;
535 /* Exit a binding level.
536 Pop the level off, and restore the state of the identifier-decl mappings
537 that were in effect when this level was entered.
539 If KEEP == 1, this level had explicit declarations, so
540 and create a "block" (a BLOCK node) for the level
541 to record its declarations and subblocks for symbol table output.
543 If FUNCTIONBODY is nonzero, this level is the body of a function,
544 so create a block as if KEEP were set and also clear out all
547 If REVERSE is nonzero, reverse the order of decls before putting
548 them into the BLOCK. */
551 poplevel (int keep
, int reverse
, int functionbody
)
554 /* The chain of decls was accumulated in reverse order.
555 Put it into forward order, just for cleanliness. */
560 int leaving_for_scope
;
563 cp_label_binding
*label_bind
;
565 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
570 gcc_assert (current_binding_level
->kind
!= sk_class
);
572 if (current_binding_level
->kind
== sk_cleanup
)
574 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
576 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
578 /* We used to use KEEP == 2 to indicate that the new block should go
579 at the beginning of the list of blocks at this binding level,
580 rather than the end. This hack is no longer used. */
581 gcc_assert (keep
== 0 || keep
== 1);
583 if (current_binding_level
->keep
)
586 /* Any uses of undefined labels, and any defined labels, now operate
587 under constraints of next binding contour. */
588 if (cfun
&& !functionbody
&& named_labels
)
589 htab_traverse (named_labels
, poplevel_named_label_1
,
590 current_binding_level
);
592 /* Get the decls in the order they were written.
593 Usually current_binding_level->names is in reverse order.
594 But parameter decls were previously put in forward order. */
597 current_binding_level
->names
598 = decls
= nreverse (current_binding_level
->names
);
600 decls
= current_binding_level
->names
;
602 /* If there were any declarations or structure tags in that level,
603 or if this level is a function body,
604 create a BLOCK to record them for the life of this function. */
606 if (keep
== 1 || functionbody
)
607 block
= make_node (BLOCK
);
608 if (block
!= NULL_TREE
)
610 BLOCK_VARS (block
) = decls
;
611 BLOCK_SUBBLOCKS (block
) = subblocks
;
614 /* In each subblock, record that this is its superior. */
616 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
617 BLOCK_SUPERCONTEXT (link
) = block
;
619 /* We still support the old for-scope rules, whereby the variables
620 in a for-init statement were in scope after the for-statement
621 ended. We only use the new rules if flag_new_for_scope is
624 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
626 /* Before we remove the declarations first check for unused variables. */
627 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
628 && !processing_template_decl
)
629 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
631 /* There are cases where D itself is a TREE_LIST. See in
632 push_local_binding where the list of decls returned by
633 getdecls is built. */
634 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
635 // See through references for improved -Wunused-variable (PR 38958).
636 tree type
= non_reference (TREE_TYPE (decl
));
638 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
639 && ! DECL_IN_SYSTEM_HEADER (decl
)
640 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
641 && type
!= error_mark_node
642 && (!CLASS_TYPE_P (type
)
643 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
644 || lookup_attribute ("warn_unused",
645 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
647 if (! TREE_USED (decl
))
648 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
649 else if (DECL_CONTEXT (decl
) == current_function_decl
650 // For -Wunused-but-set-variable leave references alone.
651 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
652 && errorcount
== unused_but_set_errorcount
)
654 warning (OPT_Wunused_but_set_variable
,
655 "variable %q+D set but not used", decl
);
656 unused_but_set_errorcount
= errorcount
;
661 /* Remove declarations for all the DECLs in this level. */
662 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
664 if (leaving_for_scope
&& VAR_P (link
)
665 /* It's hard to make this ARM compatibility hack play nicely with
666 lambdas, and it really isn't necessary in C++11 mode. */
667 && cxx_dialect
< cxx11
670 tree name
= DECL_NAME (link
);
674 ob
= outer_binding (name
,
675 IDENTIFIER_BINDING (name
),
678 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
680 ns_binding
= NULL_TREE
;
682 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
683 /* We have something like:
688 and we are leaving the `for' scope. There's no reason to
689 keep the binding of the inner `i' in this case. */
690 pop_binding (name
, link
);
691 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
692 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
693 /* Here, we have something like:
701 We must pop the for-scope binding so we know what's a
702 type and what isn't. */
703 pop_binding (name
, link
);
706 /* Mark this VAR_DECL as dead so that we can tell we left it
707 there only for backward compatibility. */
708 DECL_DEAD_FOR_LOCAL (link
) = 1;
710 /* Keep track of what should have happened when we
711 popped the binding. */
714 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
715 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
718 /* Add it to the list of dead variables in the next
719 outermost binding to that we can remove these when we
720 leave that binding. */
722 current_binding_level
->level_chain
->dead_vars_from_for
,
725 /* Although we don't pop the cxx_binding, we do clear
726 its SCOPE since the scope is going away now. */
727 IDENTIFIER_BINDING (name
)->scope
728 = current_binding_level
->level_chain
;
735 /* Remove the binding. */
738 if (TREE_CODE (decl
) == TREE_LIST
)
739 decl
= TREE_VALUE (decl
);
742 if (TREE_CODE (name
) == OVERLOAD
)
743 name
= OVL_FUNCTION (name
);
745 gcc_assert (DECL_P (name
));
746 pop_binding (DECL_NAME (name
), decl
);
750 /* Remove declarations for any `for' variables from inner scopes
751 that we kept around. */
752 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
754 pop_binding (DECL_NAME (decl
), decl
);
756 /* Restore the IDENTIFIER_TYPE_VALUEs. */
757 for (link
= current_binding_level
->type_shadowed
;
758 link
; link
= TREE_CHAIN (link
))
759 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
761 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
762 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
764 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
766 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
767 list if a `using' declaration put them there. The debugging
768 back ends won't understand OVERLOAD, so we remove them here.
769 Because the BLOCK_VARS are (temporarily) shared with
770 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
771 popped all the bindings. */
776 for (d
= &BLOCK_VARS (block
); *d
; )
778 if (TREE_CODE (*d
) == TREE_LIST
)
779 *d
= TREE_CHAIN (*d
);
781 d
= &DECL_CHAIN (*d
);
785 /* If the level being exited is the top level of a function,
786 check over all the labels. */
789 /* Since this is the top level block of a function, the vars are
790 the function's parameters. Don't leave them in the BLOCK
791 because they are found in the FUNCTION_DECL instead. */
792 BLOCK_VARS (block
) = 0;
796 kind
= current_binding_level
->kind
;
797 if (kind
== sk_cleanup
)
801 /* If this is a temporary binding created for a cleanup, then we'll
802 have pushed a statement list level. Pop that, create a new
803 BIND_EXPR for the block, and insert it into the stream. */
804 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
805 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
812 /* The current function is being defined, so its DECL_INITIAL
813 should be error_mark_node. */
814 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
815 DECL_INITIAL (current_function_decl
) = block
;
818 current_binding_level
->blocks
819 = block_chainon (current_binding_level
->blocks
, block
);
821 /* If we did not make a block for the level just exited,
822 any blocks made for inner levels
823 (since they cannot be recorded as subblocks in that level)
824 must be carried forward so they will later become subblocks
825 of something else. */
827 current_binding_level
->blocks
828 = block_chainon (current_binding_level
->blocks
, subblocks
);
830 /* Each and every BLOCK node created here in `poplevel' is important
831 (e.g. for proper debugging information) so if we created one
832 earlier, mark it as "used". */
834 TREE_USED (block
) = 1;
836 /* All temporary bindings created for cleanups are popped silently. */
837 if (kind
== sk_cleanup
)
840 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
844 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
845 itself, calling F for each. The DATA is passed to F as well. */
848 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
851 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
853 result
|= (*f
) (name_space
, data
);
855 for (; current
; current
= DECL_CHAIN (current
))
856 result
|= walk_namespaces_r (current
, f
, data
);
861 /* Walk all the namespaces, calling F for each. The DATA is passed to
865 walk_namespaces (walk_namespaces_fn f
, void* data
)
867 return walk_namespaces_r (global_namespace
, f
, data
);
870 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
871 DATA is non-NULL, this is the last time we will call
872 wrapup_global_declarations for this NAMESPACE. */
875 wrapup_globals_for_namespace (tree name_space
, void* data
)
877 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
878 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
879 tree
*vec
= statics
->address ();
880 int len
= statics
->length ();
881 int last_time
= (data
!= 0);
885 check_global_declarations (vec
, len
);
886 emit_debug_global_declarations (vec
, len
);
890 /* Write out any globals that need to be output. */
891 return wrapup_global_declarations (vec
, len
);
895 /* In C++, you don't have to write `struct S' to refer to `S'; you
896 can just use `S'. We accomplish this by creating a TYPE_DECL as
897 if the user had written `typedef struct S S'. Create and return
898 the TYPE_DECL for TYPE. */
901 create_implicit_typedef (tree name
, tree type
)
905 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
906 DECL_ARTIFICIAL (decl
) = 1;
907 /* There are other implicit type declarations, like the one *within*
908 a class that allows you to write `S::S'. We must distinguish
910 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
911 TYPE_NAME (type
) = decl
;
912 TYPE_STUB_DECL (type
) = decl
;
917 /* Remember a local name for name-mangling purposes. */
920 push_local_name (tree decl
)
925 timevar_start (TV_NAME_LOOKUP
);
927 name
= DECL_NAME (decl
);
929 nelts
= vec_safe_length (local_names
);
930 for (i
= 0; i
< nelts
; i
++)
932 t
= (*local_names
)[i
];
933 if (DECL_NAME (t
) == name
)
935 if (!DECL_LANG_SPECIFIC (decl
))
936 retrofit_lang_decl (decl
);
937 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
938 if (DECL_DISCRIMINATOR_SET_P (t
))
939 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
941 DECL_DISCRIMINATOR (decl
) = 1;
943 (*local_names
)[i
] = decl
;
944 timevar_stop (TV_NAME_LOOKUP
);
949 vec_safe_push (local_names
, decl
);
950 timevar_stop (TV_NAME_LOOKUP
);
953 /* Subroutine of duplicate_decls: return truthvalue of whether
954 or not types of these decls match.
956 For C++, we must compare the parameter list so that `int' can match
957 `int&' in a parameter position, but `int&' is not confused with
961 decls_match (tree newdecl
, tree olddecl
)
965 if (newdecl
== olddecl
)
968 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
969 /* If the two DECLs are not even the same kind of thing, we're not
970 interested in their types. */
973 gcc_assert (DECL_P (newdecl
));
975 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
977 tree f1
= TREE_TYPE (newdecl
);
978 tree f2
= TREE_TYPE (olddecl
);
979 tree p1
= TYPE_ARG_TYPES (f1
);
980 tree p2
= TYPE_ARG_TYPES (f2
);
983 /* Specializations of different templates are different functions
984 even if they have the same type. */
985 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
986 ? DECL_TI_TEMPLATE (newdecl
)
988 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
989 ? DECL_TI_TEMPLATE (olddecl
)
994 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
995 && ! (DECL_EXTERN_C_P (newdecl
)
996 && DECL_EXTERN_C_P (olddecl
)))
999 /* A new declaration doesn't match a built-in one unless it
1000 is also extern "C". */
1001 if (DECL_IS_BUILTIN (olddecl
)
1002 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1005 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1008 /* A declaration with deduced return type should use its pre-deduction
1009 type for declaration matching. */
1010 r2
= fndecl_declared_return_type (olddecl
);
1012 if (same_type_p (TREE_TYPE (f1
), r2
))
1014 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1015 && (DECL_BUILT_IN (olddecl
)
1016 #ifndef NO_IMPLICIT_EXTERN_C
1017 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1018 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1022 types_match
= self_promoting_args_p (p1
);
1023 if (p1
== void_list_node
)
1024 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1026 #ifndef NO_IMPLICIT_EXTERN_C
1027 else if (!prototype_p (f1
)
1028 && (DECL_EXTERN_C_P (olddecl
)
1029 && DECL_IN_SYSTEM_HEADER (olddecl
)
1030 && !DECL_CLASS_SCOPE_P (olddecl
))
1031 && (DECL_EXTERN_C_P (newdecl
)
1032 && DECL_IN_SYSTEM_HEADER (newdecl
)
1033 && !DECL_CLASS_SCOPE_P (newdecl
)))
1035 types_match
= self_promoting_args_p (p2
);
1036 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1042 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1043 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1044 || comp_type_attributes (TREE_TYPE (newdecl
),
1045 TREE_TYPE (olddecl
)) != 0);
1050 /* The decls dont match if they correspond to two different versions
1051 of the same function. Disallow extern "C" functions to be
1052 versions for now. */
1054 && !DECL_EXTERN_C_P (newdecl
)
1055 && !DECL_EXTERN_C_P (olddecl
)
1056 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1058 /* Mark functions as versions if necessary. Modify the mangled decl
1059 name if necessary. */
1060 if (DECL_FUNCTION_VERSIONED (newdecl
)
1061 && DECL_FUNCTION_VERSIONED (olddecl
))
1063 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1065 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1066 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1067 mangle_decl (newdecl
);
1069 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1071 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1072 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1073 mangle_decl (olddecl
);
1075 record_function_versions (olddecl
, newdecl
);
1079 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1081 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1082 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1085 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1086 DECL_TEMPLATE_PARMS (olddecl
)))
1089 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1090 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1091 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1093 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1094 DECL_TEMPLATE_RESULT (newdecl
));
1098 /* Need to check scope for variable declaration (VAR_DECL).
1099 For typedef (TYPE_DECL), scope is ignored. */
1101 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1103 Two declarations for an object with C language linkage
1104 with the same name (ignoring the namespace that qualify
1105 it) that appear in different namespace scopes refer to
1107 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1110 if (TREE_TYPE (newdecl
) == error_mark_node
)
1111 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1112 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1113 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1114 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1117 types_match
= comptypes (TREE_TYPE (newdecl
),
1118 TREE_TYPE (olddecl
),
1119 COMPARE_REDECLARATION
);
1125 /* If NEWDECL is `static' and an `extern' was seen previously,
1126 warn about it. OLDDECL is the previous declaration.
1128 Note that this does not apply to the C++ case of declaring
1129 a variable `extern const' and then later `const'.
1131 Don't complain about built-in functions, since they are beyond
1132 the user's control. */
1135 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1137 if (TREE_CODE (newdecl
) == TYPE_DECL
1138 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1139 || TREE_CODE (newdecl
) == CONST_DECL
1140 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1143 /* Don't get confused by static member functions; that's a different
1145 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1146 && DECL_STATIC_FUNCTION_P (newdecl
))
1149 /* If the old declaration was `static', or the new one isn't, then
1150 everything is OK. */
1151 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1154 /* It's OK to declare a builtin function as `static'. */
1155 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1156 && DECL_ARTIFICIAL (olddecl
))
1159 if (permerror (input_location
,
1160 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1161 inform (input_location
, "previous declaration of %q+D", olddecl
);
1164 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1165 function templates. If their exception specifications do not
1166 match, issue a diagnostic. */
1169 check_redeclaration_exception_specification (tree new_decl
,
1172 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1173 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1175 /* Two default specs are equivalent, don't force evaluation. */
1176 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1177 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1180 maybe_instantiate_noexcept (new_decl
);
1181 maybe_instantiate_noexcept (old_decl
);
1182 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1183 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1187 If any declaration of a function has an exception-specification,
1188 all declarations, including the definition and an explicit
1189 specialization, of that function shall have an
1190 exception-specification with the same set of type-ids. */
1191 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1192 && ! DECL_IS_BUILTIN (old_decl
)
1194 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1196 error ("declaration of %qF has a different exception specifier",
1198 error ("from previous declaration %q+F", old_decl
);
1202 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1203 Otherwise issue diagnostics. */
1206 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1208 old_decl
= STRIP_TEMPLATE (old_decl
);
1209 new_decl
= STRIP_TEMPLATE (new_decl
);
1210 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1211 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1213 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1214 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1216 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1218 if (DECL_BUILT_IN (old_decl
))
1220 /* Hide a built-in declaration. */
1221 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1222 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1225 /* 7.1.5 [dcl.constexpr]
1226 Note: An explicit specialization can differ from the template
1227 declaration with respect to the constexpr specifier. */
1228 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1229 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1232 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1233 error ("from previous declaration %q+D", old_decl
);
1239 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1240 && lookup_attribute ("gnu_inline", \
1241 DECL_ATTRIBUTES (fn)))
1243 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1244 If the redeclaration is invalid, a diagnostic is issued, and the
1245 error_mark_node is returned. Otherwise, OLDDECL is returned.
1247 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1250 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1253 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1255 unsigned olddecl_uid
= DECL_UID (olddecl
);
1256 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1257 int new_defines_function
= 0;
1258 tree new_template_info
;
1260 if (newdecl
== olddecl
)
1263 types_match
= decls_match (newdecl
, olddecl
);
1265 /* If either the type of the new decl or the type of the old decl is an
1266 error_mark_node, then that implies that we have already issued an
1267 error (earlier) for some bogus type specification, and in that case,
1268 it is rather pointless to harass the user with yet more error message
1269 about the same declaration, so just pretend the types match here. */
1270 if (TREE_TYPE (newdecl
) == error_mark_node
1271 || TREE_TYPE (olddecl
) == error_mark_node
)
1272 return error_mark_node
;
1274 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1275 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1277 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1278 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1279 && check_raw_literal_operator (olddecl
))
1280 error ("literal operator template %q+D conflicts with"
1281 " raw literal operator %qD", newdecl
, olddecl
);
1282 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1283 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1284 && check_raw_literal_operator (newdecl
))
1285 error ("raw literal operator %q+D conflicts with"
1286 " literal operator template %qD", newdecl
, olddecl
);
1289 if (DECL_P (olddecl
)
1290 && TREE_CODE (newdecl
) == FUNCTION_DECL
1291 && TREE_CODE (olddecl
) == FUNCTION_DECL
1292 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1294 if (DECL_DECLARED_INLINE_P (newdecl
)
1295 && DECL_UNINLINABLE (newdecl
)
1296 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1297 /* Already warned elsewhere. */;
1298 else if (DECL_DECLARED_INLINE_P (olddecl
)
1299 && DECL_UNINLINABLE (olddecl
)
1300 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1301 /* Already warned. */;
1302 else if (DECL_DECLARED_INLINE_P (newdecl
)
1303 && DECL_UNINLINABLE (olddecl
)
1304 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1306 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1308 inform (DECL_SOURCE_LOCATION (olddecl
),
1309 "previous declaration of %qD with attribute noinline",
1312 else if (DECL_DECLARED_INLINE_P (olddecl
)
1313 && DECL_UNINLINABLE (newdecl
)
1314 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1316 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1317 "attribute noinline", newdecl
))
1318 inform (DECL_SOURCE_LOCATION (olddecl
),
1319 "previous declaration of %qD was inline",
1324 /* Check for redeclaration and other discrepancies. */
1325 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1326 && DECL_ARTIFICIAL (olddecl
))
1328 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1329 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1331 /* Avoid warnings redeclaring built-ins which have not been
1332 explicitly declared. */
1333 if (DECL_ANTICIPATED (olddecl
))
1336 /* If you declare a built-in or predefined function name as static,
1337 the old definition is overridden, but optionally warn this was a
1338 bad choice of name. */
1339 if (! TREE_PUBLIC (newdecl
))
1341 warning (OPT_Wshadow
,
1342 DECL_BUILT_IN (olddecl
)
1343 ? G_("shadowing built-in function %q#D")
1344 : G_("shadowing library function %q#D"), olddecl
);
1345 /* Discard the old built-in function. */
1348 /* If the built-in is not ansi, then programs can override
1349 it even globally without an error. */
1350 else if (! DECL_BUILT_IN (olddecl
))
1351 warning (0, "library function %q#D redeclared as non-function %q#D",
1354 error ("declaration of %q#D conflicts with built-in "
1355 "declaration %q#D", newdecl
, olddecl
);
1358 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1360 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1361 error_at (DECL_SOURCE_LOCATION (newdecl
),
1362 "redeclaration of %<pragma omp declare reduction%>");
1363 inform (DECL_SOURCE_LOCATION (olddecl
),
1364 "previous %<pragma omp declare reduction%> declaration");
1365 return error_mark_node
;
1367 else if (!types_match
)
1369 /* Avoid warnings redeclaring built-ins which have not been
1370 explicitly declared. */
1371 if (DECL_ANTICIPATED (olddecl
))
1373 /* Deal with fileptr_type_node. FILE type is not known
1374 at the time we create the builtins. */
1377 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1378 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1380 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1383 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1385 tree t
= TREE_VALUE (t1
);
1388 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1389 == get_identifier ("FILE")
1390 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1392 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1395 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1396 types_match
= decls_match (newdecl
, olddecl
);
1398 return duplicate_decls (newdecl
, olddecl
,
1400 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1403 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1406 else if ((DECL_EXTERN_C_P (newdecl
)
1407 && DECL_EXTERN_C_P (olddecl
))
1408 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1409 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1411 /* A near match; override the builtin. */
1413 if (TREE_PUBLIC (newdecl
))
1414 warning (0, "new declaration %q#D ambiguates built-in "
1415 "declaration %q#D", newdecl
, olddecl
);
1417 warning (OPT_Wshadow
,
1418 DECL_BUILT_IN (olddecl
)
1419 ? G_("shadowing built-in function %q#D")
1420 : G_("shadowing library function %q#D"), olddecl
);
1423 /* Discard the old built-in function. */
1426 /* Replace the old RTL to avoid problems with inlining. */
1427 COPY_DECL_RTL (newdecl
, olddecl
);
1429 /* Even if the types match, prefer the new declarations type for
1430 built-ins which have not been explicitly declared, for
1431 exception lists, etc... */
1432 else if (DECL_IS_BUILTIN (olddecl
))
1434 tree type
= TREE_TYPE (newdecl
);
1435 tree attribs
= (*targetm
.merge_type_attributes
)
1436 (TREE_TYPE (olddecl
), type
);
1438 type
= cp_build_type_attribute_variant (type
, attribs
);
1439 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1442 /* If a function is explicitly declared "throw ()", propagate that to
1443 the corresponding builtin. */
1444 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1445 && DECL_ANTICIPATED (olddecl
)
1446 && TREE_NOTHROW (newdecl
)
1447 && !TREE_NOTHROW (olddecl
))
1449 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1450 tree tmpdecl
= builtin_decl_explicit (fncode
);
1451 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1452 TREE_NOTHROW (tmpdecl
) = 1;
1455 /* Whether or not the builtin can throw exceptions has no
1456 bearing on this declarator. */
1457 TREE_NOTHROW (olddecl
) = 0;
1459 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1461 /* If a builtin function is redeclared as `static', merge
1462 the declarations, but make the original one static. */
1463 DECL_THIS_STATIC (olddecl
) = 1;
1464 TREE_PUBLIC (olddecl
) = 0;
1466 /* Make the old declaration consistent with the new one so
1467 that all remnants of the builtin-ness of this function
1468 will be banished. */
1469 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1470 COPY_DECL_RTL (newdecl
, olddecl
);
1473 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1475 /* C++ Standard, 3.3, clause 4:
1476 "[Note: a namespace name or a class template name must be unique
1477 in its declarative region (7.3.2, clause 14). ]" */
1478 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1479 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1480 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1481 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1482 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1483 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1485 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1486 && TREE_CODE (newdecl
) != TYPE_DECL
)
1487 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1488 && TREE_CODE (olddecl
) != TYPE_DECL
))
1490 /* We do nothing special here, because C++ does such nasty
1491 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1492 get shadowed, and know that if we need to find a TYPE_DECL
1493 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1494 slot of the identifier. */
1498 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1499 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1500 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1501 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1505 error ("%q#D redeclared as different kind of symbol", newdecl
);
1506 if (TREE_CODE (olddecl
) == TREE_LIST
)
1507 olddecl
= TREE_VALUE (olddecl
);
1508 inform (DECL_SOURCE_LOCATION (olddecl
),
1509 "previous declaration %q#D", olddecl
);
1511 return error_mark_node
;
1513 else if (!types_match
)
1515 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1516 /* These are certainly not duplicate declarations; they're
1517 from different scopes. */
1520 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1522 /* The name of a class template may not be declared to refer to
1523 any other template, class, function, object, namespace, value,
1524 or type in the same scope. */
1525 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1526 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1528 error ("conflicting declaration of template %q#D", newdecl
);
1529 inform (DECL_SOURCE_LOCATION (olddecl
),
1530 "previous declaration %q#D", olddecl
);
1531 return error_mark_node
;
1533 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1534 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1535 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1536 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1537 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1538 DECL_TEMPLATE_PARMS (olddecl
))
1539 /* Template functions can be disambiguated by
1541 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1542 TREE_TYPE (TREE_TYPE (olddecl
))))
1544 error ("ambiguating new declaration %q#D", newdecl
);
1545 inform (DECL_SOURCE_LOCATION (olddecl
),
1546 "old declaration %q#D", olddecl
);
1550 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1552 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1554 error ("conflicting declaration of C function %q#D",
1556 inform (DECL_SOURCE_LOCATION (olddecl
),
1557 "previous declaration %q#D", olddecl
);
1560 /* For function versions, params and types match, but they
1561 are not ambiguous. */
1562 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1563 && !DECL_FUNCTION_VERSIONED (olddecl
))
1564 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1565 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1567 error ("ambiguating new declaration of %q#D", newdecl
);
1568 inform (DECL_SOURCE_LOCATION (olddecl
),
1569 "old declaration %q#D", olddecl
);
1570 return error_mark_node
;
1577 error ("conflicting declaration %q#D", newdecl
);
1578 inform (DECL_SOURCE_LOCATION (olddecl
),
1579 "previous declaration as %q#D", olddecl
);
1580 return error_mark_node
;
1583 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1584 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1585 && (!DECL_TEMPLATE_INFO (newdecl
)
1586 || (DECL_TI_TEMPLATE (newdecl
)
1587 != DECL_TI_TEMPLATE (olddecl
))))
1588 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1589 && (!DECL_TEMPLATE_INFO (olddecl
)
1590 || (DECL_TI_TEMPLATE (olddecl
)
1591 != DECL_TI_TEMPLATE (newdecl
))))))
1592 /* It's OK to have a template specialization and a non-template
1593 with the same type, or to have specializations of two
1594 different templates with the same type. Note that if one is a
1595 specialization, and the other is an instantiation of the same
1596 template, that we do not exit at this point. That situation
1597 can occur if we instantiate a template class, and then
1598 specialize one of its methods. This situation is valid, but
1599 the declarations must be merged in the usual way. */
1601 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1602 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1603 && !DECL_USE_TEMPLATE (newdecl
))
1604 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1605 && !DECL_USE_TEMPLATE (olddecl
))))
1606 /* One of the declarations is a template instantiation, and the
1607 other is not a template at all. That's OK. */
1609 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1611 /* In [namespace.alias] we have:
1613 In a declarative region, a namespace-alias-definition can be
1614 used to redefine a namespace-alias declared in that declarative
1615 region to refer only to the namespace to which it already
1618 Therefore, if we encounter a second alias directive for the same
1619 alias, we can just ignore the second directive. */
1620 if (DECL_NAMESPACE_ALIAS (newdecl
)
1621 && (DECL_NAMESPACE_ALIAS (newdecl
)
1622 == DECL_NAMESPACE_ALIAS (olddecl
)))
1624 /* [namespace.alias]
1626 A namespace-name or namespace-alias shall not be declared as
1627 the name of any other entity in the same declarative region.
1628 A namespace-name defined at global scope shall not be
1629 declared as the name of any other entity in any global scope
1631 error ("conflicting declaration of namespace %qD", newdecl
);
1632 inform (DECL_SOURCE_LOCATION (olddecl
),
1633 "previous declaration of namespace %qD here", olddecl
);
1634 return error_mark_node
;
1638 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1641 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1642 if (DECL_NAME (olddecl
) != NULL_TREE
)
1643 inform (input_location
,
1644 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1645 ? G_("%q+#D previously defined here")
1646 : G_("%q+#D previously declared here"), olddecl
);
1647 return error_mark_node
;
1649 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1650 && DECL_INITIAL (olddecl
) != NULL_TREE
1651 && !prototype_p (TREE_TYPE (olddecl
))
1652 && prototype_p (TREE_TYPE (newdecl
)))
1654 /* Prototype decl follows defn w/o prototype. */
1655 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1656 "prototype specified for %q#D", newdecl
))
1657 inform (DECL_SOURCE_LOCATION (olddecl
),
1658 "previous non-prototype definition here");
1660 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1661 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1664 If two declarations of the same function or object
1665 specify different linkage-specifications ..., the program
1666 is ill-formed.... Except for functions with C++ linkage,
1667 a function declaration without a linkage specification
1668 shall not precede the first linkage specification for
1669 that function. A function can be declared without a
1670 linkage specification after an explicit linkage
1671 specification has been seen; the linkage explicitly
1672 specified in the earlier declaration is not affected by
1673 such a function declaration.
1675 DR 563 raises the question why the restrictions on
1676 functions should not also apply to objects. Older
1677 versions of G++ silently ignore the linkage-specification
1685 which is clearly wrong. Therefore, we now treat objects
1687 if (current_lang_depth () == 0)
1689 /* There is no explicit linkage-specification, so we use
1690 the linkage from the previous declaration. */
1691 if (!DECL_LANG_SPECIFIC (newdecl
))
1692 retrofit_lang_decl (newdecl
);
1693 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1697 error ("conflicting declaration of %q#D with %qL linkage",
1698 newdecl
, DECL_LANGUAGE (newdecl
));
1699 inform (DECL_SOURCE_LOCATION (olddecl
),
1700 "previous declaration with %qL linkage",
1701 DECL_LANGUAGE (olddecl
));
1705 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1707 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1709 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1710 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1713 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1714 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1716 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
1717 && CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (newdecl
)))
1720 Default arguments for a member function of a class template
1721 shall be specified on the initial declaration of the member
1722 function within the class template. */
1723 for (; t2
&& t2
!= void_list_node
; t2
= TREE_CHAIN (t2
))
1724 if (TREE_PURPOSE (t2
))
1726 permerror (input_location
,
1727 "redeclaration of %q#D may not have default "
1728 "arguments", newdecl
);
1734 for (; t1
&& t1
!= void_list_node
;
1735 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1736 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1738 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1741 if (permerror (input_location
,
1742 "default argument given for parameter "
1743 "%d of %q#D", i
, newdecl
))
1744 inform (DECL_SOURCE_LOCATION (olddecl
),
1745 "previous specification in %q#D here",
1750 error ("default argument given for parameter %d "
1751 "of %q#D", i
, newdecl
);
1752 inform (DECL_SOURCE_LOCATION (olddecl
),
1753 "previous specification in %q#D here",
1761 /* Do not merge an implicit typedef with an explicit one. In:
1765 typedef class A A __attribute__ ((foo));
1767 the attribute should apply only to the typedef. */
1768 if (TREE_CODE (olddecl
) == TYPE_DECL
1769 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1770 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1773 /* If new decl is `static' and an `extern' was seen previously,
1775 warn_extern_redeclared_static (newdecl
, olddecl
);
1777 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1778 return error_mark_node
;
1780 /* We have committed to returning 1 at this point. */
1781 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1783 /* Now that functions must hold information normally held
1784 by field decls, there is extra work to do so that
1785 declaration information does not get destroyed during
1787 if (DECL_VINDEX (olddecl
))
1788 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1789 if (DECL_CONTEXT (olddecl
))
1790 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1791 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1792 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1793 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1794 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1795 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1796 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1797 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1798 SET_OVERLOADED_OPERATOR_CODE
1799 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1800 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1802 /* Optionally warn about more than one declaration for the same
1803 name, but don't warn about a function declaration followed by a
1805 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1806 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1807 /* Don't warn about extern decl followed by definition. */
1808 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1809 /* Don't warn about friends, let add_friend take care of it. */
1810 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1811 /* Don't warn about declaration followed by specialization. */
1812 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1813 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1815 if (warning (OPT_Wredundant_decls
,
1816 "redundant redeclaration of %qD in same scope",
1818 inform (DECL_SOURCE_LOCATION (olddecl
),
1819 "previous declaration of %qD", olddecl
);
1822 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1823 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1825 if (DECL_DELETED_FN (newdecl
))
1827 error ("deleted definition of %qD", newdecl
);
1828 inform (DECL_SOURCE_LOCATION (olddecl
),
1829 "previous declaration of %qD", olddecl
);
1831 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1835 /* Deal with C++: must preserve virtual function table size. */
1836 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1838 tree newtype
= TREE_TYPE (newdecl
);
1839 tree oldtype
= TREE_TYPE (olddecl
);
1841 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1842 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1843 CLASSTYPE_FRIEND_CLASSES (newtype
)
1844 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1846 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1849 /* Copy all the DECL_... slots specified in the new decl
1850 except for any that we copy here from the old type. */
1851 DECL_ATTRIBUTES (newdecl
)
1852 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1854 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1858 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1859 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1860 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1861 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1862 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1863 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1865 DECL_ATTRIBUTES (old_result
)
1866 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1868 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1870 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1871 && DECL_INITIAL (new_result
))
1873 if (DECL_INITIAL (old_result
))
1874 DECL_UNINLINABLE (old_result
) = 1;
1876 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1877 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1878 DECL_NOT_REALLY_EXTERN (old_result
)
1879 = DECL_NOT_REALLY_EXTERN (new_result
);
1880 DECL_INTERFACE_KNOWN (old_result
)
1881 = DECL_INTERFACE_KNOWN (new_result
);
1882 DECL_DECLARED_INLINE_P (old_result
)
1883 = DECL_DECLARED_INLINE_P (new_result
);
1884 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1885 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1890 DECL_DECLARED_INLINE_P (old_result
)
1891 |= DECL_DECLARED_INLINE_P (new_result
);
1892 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1893 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1894 check_redeclaration_exception_specification (newdecl
, olddecl
);
1898 /* If the new declaration is a definition, update the file and
1899 line information on the declaration, and also make
1900 the old declaration the same definition. */
1901 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1903 DECL_SOURCE_LOCATION (olddecl
)
1904 = DECL_SOURCE_LOCATION (old_result
)
1905 = DECL_SOURCE_LOCATION (newdecl
);
1906 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1907 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1910 DECL_ARGUMENTS (old_result
)
1911 = DECL_ARGUMENTS (new_result
);
1912 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1913 parm
= DECL_CHAIN (parm
))
1914 DECL_CONTEXT (parm
) = old_result
;
1923 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1924 check_redeclaration_exception_specification (newdecl
, olddecl
);
1926 /* Automatically handles default parameters. */
1927 tree oldtype
= TREE_TYPE (olddecl
);
1930 /* For typedefs use the old type, as the new type's DECL_NAME points
1931 at newdecl, which will be ggc_freed. */
1932 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1935 /* Merge the data types specified in the two decls. */
1936 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1938 if (VAR_P (newdecl
))
1940 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1941 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1942 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1943 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1944 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1945 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1947 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1948 if (DECL_LANG_SPECIFIC (olddecl
)
1949 && CP_DECL_THREADPRIVATE_P (olddecl
))
1951 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1952 if (!DECL_LANG_SPECIFIC (newdecl
))
1953 retrofit_lang_decl (newdecl
);
1955 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1956 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1960 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1962 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1963 check_default_args (newdecl
);
1965 /* Lay the type out, unless already done. */
1966 if (! same_type_p (newtype
, oldtype
)
1967 && TREE_TYPE (newdecl
) != error_mark_node
1968 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1969 layout_type (TREE_TYPE (newdecl
));
1971 if ((VAR_P (newdecl
)
1972 || TREE_CODE (newdecl
) == PARM_DECL
1973 || TREE_CODE (newdecl
) == RESULT_DECL
1974 || TREE_CODE (newdecl
) == FIELD_DECL
1975 || TREE_CODE (newdecl
) == TYPE_DECL
)
1976 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1977 layout_decl (newdecl
, 0);
1979 /* Merge the type qualifiers. */
1980 if (TREE_READONLY (newdecl
))
1981 TREE_READONLY (olddecl
) = 1;
1982 if (TREE_THIS_VOLATILE (newdecl
))
1983 TREE_THIS_VOLATILE (olddecl
) = 1;
1984 if (TREE_NOTHROW (newdecl
))
1985 TREE_NOTHROW (olddecl
) = 1;
1987 /* Merge deprecatedness. */
1988 if (TREE_DEPRECATED (newdecl
))
1989 TREE_DEPRECATED (olddecl
) = 1;
1991 /* Preserve function specific target and optimization options */
1992 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1994 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1995 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1996 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1997 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1999 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2000 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2001 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2002 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2005 /* Merge the initialization information. */
2006 if (DECL_INITIAL (newdecl
) == NULL_TREE
2007 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2009 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2010 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2011 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2013 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2014 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2018 /* Merge the section attribute.
2019 We want to issue an error if the sections conflict but that must be
2020 done later in decl_attributes since we are called before attributes
2022 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
2023 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
2025 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2027 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2028 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2029 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2030 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2031 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2032 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2033 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2034 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2035 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2036 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2037 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2038 /* Keep the old RTL. */
2039 COPY_DECL_RTL (olddecl
, newdecl
);
2041 else if (VAR_P (newdecl
)
2042 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2044 /* Keep the old RTL. We cannot keep the old RTL if the old
2045 declaration was for an incomplete object and the new
2046 declaration is not since many attributes of the RTL will
2048 COPY_DECL_RTL (olddecl
, newdecl
);
2051 /* If cannot merge, then use the new type and qualifiers,
2052 and don't preserve the old rtl. */
2055 /* Clean out any memory we had of the old declaration. */
2056 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2058 TREE_VALUE (oldstatic
) = error_mark_node
;
2060 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2061 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2062 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2063 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2066 /* Merge the storage class information. */
2067 merge_weak (newdecl
, olddecl
);
2069 if ((TREE_CODE (olddecl
) == FUNCTION_DECL
|| TREE_CODE (olddecl
) == VAR_DECL
)
2070 && (DECL_EXTERNAL (olddecl
) || TREE_PUBLIC (olddecl
) || TREE_STATIC (olddecl
))
2071 && DECL_ONE_ONLY (olddecl
))
2073 struct symtab_node
*symbol
;
2074 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2075 symbol
= cgraph_get_create_node (newdecl
);
2077 symbol
= varpool_node_for_decl (newdecl
);
2078 symbol
->set_comdat_group (symtab_get_node (olddecl
)->get_comdat_group ());
2081 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2082 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2083 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2084 if (! DECL_EXTERNAL (olddecl
))
2085 DECL_EXTERNAL (newdecl
) = 0;
2087 new_template_info
= NULL_TREE
;
2088 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2090 bool new_redefines_gnu_inline
= false;
2092 if (new_defines_function
2093 && ((DECL_INTERFACE_KNOWN (olddecl
)
2094 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2095 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2096 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2097 == FUNCTION_DECL
))))
2101 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2102 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2104 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2107 if (!new_redefines_gnu_inline
)
2109 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2110 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2111 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2113 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2114 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2115 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2117 /* If the OLDDECL is an instantiation and/or specialization,
2118 then the NEWDECL must be too. But, it may not yet be marked
2119 as such if the caller has created NEWDECL, but has not yet
2120 figured out that it is a redeclaration. */
2121 if (!DECL_USE_TEMPLATE (newdecl
))
2122 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2124 /* Don't really know how much of the language-specific
2125 values we should copy from old to new. */
2126 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2127 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2128 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2129 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2131 if (LANG_DECL_HAS_MIN (newdecl
))
2133 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2134 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2135 if (DECL_TEMPLATE_INFO (newdecl
))
2136 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2137 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2139 /* Only functions have these fields. */
2140 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2142 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2143 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2144 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2145 && DECL_HIDDEN_FRIEND_P (olddecl
)
2146 && newdecl_is_friend
);
2147 DECL_BEFRIENDING_CLASSES (newdecl
)
2148 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2149 DECL_BEFRIENDING_CLASSES (olddecl
));
2150 /* DECL_THUNKS is only valid for virtual functions,
2151 otherwise it is a DECL_FRIEND_CONTEXT. */
2152 if (DECL_VIRTUAL_P (newdecl
))
2153 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2155 /* Only variables have this field. */
2156 else if (VAR_P (newdecl
)
2157 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2158 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2161 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2165 /* Merge parameter attributes. */
2166 tree oldarg
, newarg
;
2167 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2168 newarg
= DECL_ARGUMENTS(newdecl
);
2170 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2171 DECL_ATTRIBUTES (newarg
)
2172 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2173 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2176 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2177 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2179 /* If newdecl is not a specialization, then it is not a
2180 template-related function at all. And that means that we
2181 should have exited above, returning 0. */
2182 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2184 if (DECL_ODR_USED (olddecl
))
2185 /* From [temp.expl.spec]:
2187 If a template, a member template or the member of a class
2188 template is explicitly specialized then that
2189 specialization shall be declared before the first use of
2190 that specialization that would cause an implicit
2191 instantiation to take place, in every translation unit in
2192 which such a use occurs. */
2193 error ("explicit specialization of %qD after first use",
2196 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2198 /* Don't propagate visibility from the template to the
2199 specialization here. We'll do that in determine_visibility if
2201 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2203 /* [temp.expl.spec/14] We don't inline explicit specialization
2204 just because the primary template says so. */
2206 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2207 the always_inline attribute. */
2208 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2209 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2211 if (DECL_DECLARED_INLINE_P (newdecl
))
2212 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2214 DECL_ATTRIBUTES (newdecl
)
2215 = remove_attribute ("always_inline",
2216 DECL_ATTRIBUTES (newdecl
));
2219 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2221 /* Never inline re-defined extern inline functions.
2222 FIXME: this could be better handled by keeping both
2223 function as separate declarations. */
2224 DECL_UNINLINABLE (newdecl
) = 1;
2228 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2229 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2231 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2233 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2234 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2236 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2237 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2238 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2239 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2242 /* Preserve abstractness on cloned [cd]tors. */
2243 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2245 /* Update newdecl's parms to point at olddecl. */
2246 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2247 parm
= DECL_CHAIN (parm
))
2248 DECL_CONTEXT (parm
) = olddecl
;
2252 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2253 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2254 COPY_DECL_RTL (newdecl
, olddecl
);
2256 if (! types_match
|| new_defines_function
)
2258 /* These need to be copied so that the names are available.
2259 Note that if the types do match, we'll preserve inline
2260 info and other bits, but if not, we won't. */
2261 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2262 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2264 /* If redeclaring a builtin function, it stays built in
2265 if newdecl is a gnu_inline definition, or if newdecl is just
2267 if (DECL_BUILT_IN (olddecl
)
2268 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2270 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2271 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2272 /* If we're keeping the built-in definition, keep the rtl,
2273 regardless of declaration matches. */
2274 COPY_DECL_RTL (olddecl
, newdecl
);
2275 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2277 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2280 /* If a compatible prototype of these builtin functions
2281 is seen, assume the runtime implements it with the
2282 expected semantics. */
2283 case BUILT_IN_STPCPY
:
2284 if (builtin_decl_explicit_p (fncode
))
2285 set_builtin_decl_implicit_p (fncode
, true);
2292 if (new_defines_function
)
2293 /* If defining a function declared with other language
2294 linkage, use the previously declared language linkage. */
2295 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2296 else if (types_match
)
2298 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2299 /* Don't clear out the arguments if we're just redeclaring a
2301 if (DECL_ARGUMENTS (olddecl
))
2302 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2305 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2306 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2308 /* Now preserve various other info from the definition. */
2309 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2310 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2311 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2312 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2314 /* Warn about conflicting visibility specifications. */
2315 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2316 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2317 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2319 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2320 "%qD: visibility attribute ignored because it "
2321 "conflicts with previous declaration", newdecl
))
2322 inform (DECL_SOURCE_LOCATION (olddecl
),
2323 "previous declaration of %qD", olddecl
);
2325 /* Choose the declaration which specified visibility. */
2326 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2328 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2329 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2331 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2332 so keep this behavior. */
2333 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2335 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2336 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2338 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2339 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2341 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2342 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2344 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2345 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2346 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2348 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2349 with that from NEWDECL below. */
2350 if (DECL_LANG_SPECIFIC (olddecl
))
2352 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2353 != DECL_LANG_SPECIFIC (newdecl
));
2354 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2357 /* Merge the USED information. */
2358 if (TREE_USED (olddecl
))
2359 TREE_USED (newdecl
) = 1;
2360 else if (TREE_USED (newdecl
))
2361 TREE_USED (olddecl
) = 1;
2362 if (VAR_P (newdecl
))
2364 if (DECL_READ_P (olddecl
))
2365 DECL_READ_P (newdecl
) = 1;
2366 else if (DECL_READ_P (newdecl
))
2367 DECL_READ_P (olddecl
) = 1;
2369 if (DECL_PRESERVE_P (olddecl
))
2370 DECL_PRESERVE_P (newdecl
) = 1;
2371 else if (DECL_PRESERVE_P (newdecl
))
2372 DECL_PRESERVE_P (olddecl
) = 1;
2374 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2375 to olddecl and deleted. */
2376 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2377 && DECL_FUNCTION_VERSIONED (olddecl
))
2379 /* Set the flag for newdecl so that it gets copied to olddecl. */
2380 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2381 /* newdecl will be purged after copying to olddecl and is no longer
2383 delete_function_version (newdecl
);
2386 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2389 struct symtab_node
*snode
= symtab_get_node (olddecl
);
2391 function_size
= sizeof (struct tree_decl_common
);
2393 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2394 (char *) newdecl
+ sizeof (struct tree_common
),
2395 function_size
- sizeof (struct tree_common
));
2397 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2398 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2399 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2401 /* Preserve symtab node mapping. */
2402 olddecl
->decl_with_vis
.symtab_node
= snode
;
2404 if (new_template_info
)
2405 /* If newdecl is a template instantiation, it is possible that
2406 the following sequence of events has occurred:
2408 o A friend function was declared in a class template. The
2409 class template was instantiated.
2411 o The instantiation of the friend declaration was
2412 recorded on the instantiation list, and is newdecl.
2414 o Later, however, instantiate_class_template called pushdecl
2415 on the newdecl to perform name injection. But, pushdecl in
2416 turn called duplicate_decls when it discovered that another
2417 declaration of a global function with the same name already
2420 o Here, in duplicate_decls, we decided to clobber newdecl.
2422 If we're going to do that, we'd better make sure that
2423 olddecl, and not newdecl, is on the list of
2424 instantiations so that if we try to do the instantiation
2425 again we won't get the clobbered declaration. */
2426 reregister_specialization (newdecl
,
2432 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2434 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2435 (char *) newdecl
+ sizeof (struct tree_common
),
2436 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2437 switch (TREE_CODE (olddecl
))
2447 struct symtab_node
*snode
= NULL
;
2449 if (TREE_CODE (olddecl
) == VAR_DECL
2450 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2451 snode
= symtab_get_node (olddecl
);
2452 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2453 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2454 size
- sizeof (struct tree_decl_common
)
2455 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2456 if (TREE_CODE (olddecl
) == VAR_DECL
)
2457 olddecl
->decl_with_vis
.symtab_node
= snode
;
2461 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2462 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2463 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2464 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2468 DECL_UID (olddecl
) = olddecl_uid
;
2470 DECL_FRIEND_P (olddecl
) = 1;
2473 DECL_ANTICIPATED (olddecl
) = 1;
2474 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2477 /* NEWDECL contains the merged attribute lists.
2478 Update OLDDECL to be the same. */
2479 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2481 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2482 so that encode_section_info has a chance to look at the new decl
2483 flags and attributes. */
2484 if (DECL_RTL_SET_P (olddecl
)
2485 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2487 && TREE_STATIC (olddecl
))))
2488 make_decl_rtl (olddecl
);
2490 /* The NEWDECL will no longer be needed. Because every out-of-class
2491 declaration of a member results in a call to duplicate_decls,
2492 freeing these nodes represents in a significant savings.
2494 Before releasing the node, be sore to remove function from symbol
2495 table that might have been inserted there to record comdat group.
2496 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2497 structure is shared in between newdecl and oldecl. */
2498 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2499 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2500 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2501 || TREE_CODE (newdecl
) == VAR_DECL
)
2503 struct symtab_node
*snode
= symtab_get_node (newdecl
);
2505 symtab_remove_node (snode
);
2512 /* Return zero if the declaration NEWDECL is valid
2513 when the declaration OLDDECL (assumed to be for the same name)
2514 has already been seen.
2515 Otherwise return an error message format string with a %s
2516 where the identifier should go. */
2519 redeclaration_error_message (tree newdecl
, tree olddecl
)
2521 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2523 /* Because C++ can put things into name space for free,
2524 constructs like "typedef struct foo { ... } foo"
2525 would look like an erroneous redeclaration. */
2526 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2529 return G_("redefinition of %q#D");
2531 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2533 /* If this is a pure function, its olddecl will actually be
2534 the original initialization to `0' (which we force to call
2535 abort()). Don't complain about redefinition in this case. */
2536 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2537 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2540 /* If both functions come from different namespaces, this is not
2541 a redeclaration - this is a conflict with a used function. */
2542 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2543 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2544 && ! decls_match (olddecl
, newdecl
))
2545 return G_("%qD conflicts with used function");
2547 /* We'll complain about linkage mismatches in
2548 warn_extern_redeclared_static. */
2550 /* Defining the same name twice is no good. */
2551 if (DECL_INITIAL (olddecl
) != NULL_TREE
2552 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2554 if (DECL_NAME (olddecl
) == NULL_TREE
)
2555 return G_("%q#D not declared in class");
2556 else if (!GNU_INLINE_P (olddecl
)
2557 || GNU_INLINE_P (newdecl
))
2558 return G_("redefinition of %q#D");
2561 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2563 bool olda
= GNU_INLINE_P (olddecl
);
2564 bool newa
= GNU_INLINE_P (newdecl
);
2569 return G_("%q+D redeclared inline with "
2570 "%<gnu_inline%> attribute");
2572 return G_("%q+D redeclared inline without "
2573 "%<gnu_inline%> attribute");
2577 check_abi_tag_redeclaration
2578 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2579 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2583 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2587 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2589 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2590 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2591 return G_("redefinition of %q#D");
2595 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2596 || (DECL_TEMPLATE_RESULT (newdecl
)
2597 == DECL_TEMPLATE_RESULT (olddecl
)))
2600 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2601 if (DECL_TEMPLATE_INFO (nt
))
2602 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2603 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2604 if (DECL_TEMPLATE_INFO (ot
))
2605 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2606 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2607 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2608 return G_("redefinition of %q#D");
2610 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2612 bool olda
= GNU_INLINE_P (ot
);
2613 bool newa
= GNU_INLINE_P (nt
);
2618 return G_("%q+D redeclared inline with "
2619 "%<gnu_inline%> attribute");
2621 return G_("%q+D redeclared inline without "
2622 "%<gnu_inline%> attribute");
2626 /* Core issue #226 (C++0x):
2628 If a friend function template declaration specifies a
2629 default template-argument, that declaration shall be a
2630 definition and shall be the only declaration of the
2631 function template in the translation unit. */
2632 if ((cxx_dialect
!= cxx98
)
2633 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2634 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2635 /*is_primary=*/true,
2636 /*is_partial=*/false,
2637 /*is_friend_decl=*/2))
2638 return G_("redeclaration of friend %q#D "
2639 "may not have default template arguments");
2643 else if (VAR_P (newdecl
)
2644 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2645 && (! DECL_LANG_SPECIFIC (olddecl
)
2646 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2647 || DECL_THREAD_LOCAL_P (newdecl
)))
2649 /* Only variables can be thread-local, and all declarations must
2650 agree on this property. */
2651 if (DECL_THREAD_LOCAL_P (newdecl
))
2652 return G_("thread-local declaration of %q#D follows "
2653 "non-thread-local declaration");
2655 return G_("non-thread-local declaration of %q#D follows "
2656 "thread-local declaration");
2658 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2660 /* The objects have been declared at namespace scope. If either
2661 is a member of an anonymous union, then this is an invalid
2662 redeclaration. For example:
2668 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2669 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2670 return G_("redeclaration of %q#D");
2671 /* If at least one declaration is a reference, there is no
2672 conflict. For example:
2678 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2680 /* Reject two definitions. */
2681 return G_("redefinition of %q#D");
2685 /* Objects declared with block scope: */
2686 /* Reject two definitions, and reject a definition
2687 together with an external reference. */
2688 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2689 return G_("redeclaration of %q#D");
2694 /* Hash and equality functions for the named_label table. */
2697 named_label_entry_hash (const void *data
)
2699 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2700 return DECL_UID (ent
->label_decl
);
2704 named_label_entry_eq (const void *a
, const void *b
)
2706 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2707 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2708 return ent_a
->label_decl
== ent_b
->label_decl
;
2711 /* Create a new label, named ID. */
2714 make_label_decl (tree id
, int local_p
)
2716 struct named_label_entry
*ent
;
2720 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2722 DECL_CONTEXT (decl
) = current_function_decl
;
2723 DECL_MODE (decl
) = VOIDmode
;
2724 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2726 /* Say where one reference is to the label, for the sake of the
2727 error if it is not defined. */
2728 DECL_SOURCE_LOCATION (decl
) = input_location
;
2730 /* Record the fact that this identifier is bound to this label. */
2731 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2733 /* Create the label htab for the function on demand. */
2735 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2736 named_label_entry_eq
, NULL
);
2738 /* Record this label on the list of labels used in this function.
2739 We do this before calling make_label_decl so that we get the
2740 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2741 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2742 ent
->label_decl
= decl
;
2744 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2745 gcc_assert (*slot
== NULL
);
2751 /* Look for a label named ID in the current function. If one cannot
2752 be found, create one. (We keep track of used, but undefined,
2753 labels, and complain about them at the end of a function.) */
2756 lookup_label_1 (tree id
)
2760 /* You can't use labels at global scope. */
2761 if (current_function_decl
== NULL_TREE
)
2763 error ("label %qE referenced outside of any function", id
);
2767 /* See if we've already got this label. */
2768 decl
= IDENTIFIER_LABEL_VALUE (id
);
2769 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2772 decl
= make_label_decl (id
, /*local_p=*/0);
2776 /* Wrapper for lookup_label_1. */
2779 lookup_label (tree id
)
2782 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2783 ret
= lookup_label_1 (id
);
2784 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2788 /* Declare a local label named ID. */
2791 declare_local_label (tree id
)
2794 cp_label_binding bind
;
2796 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2797 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2798 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2800 decl
= make_label_decl (id
, /*local_p=*/1);
2802 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2807 /* Returns nonzero if it is ill-formed to jump past the declaration of
2808 DECL. Returns 2 if it's also a real problem. */
2811 decl_jump_unsafe (tree decl
)
2813 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2814 with automatic storage duration is not in scope to a point where it is
2815 in scope is ill-formed unless the variable has scalar type, class type
2816 with a trivial default constructor and a trivial destructor, a
2817 cv-qualified version of one of these types, or an array of one of the
2818 preceding types and is declared without an initializer (8.5). */
2819 tree type
= TREE_TYPE (decl
);
2821 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2822 || type
== error_mark_node
)
2825 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2826 || variably_modified_type_p (type
, NULL_TREE
))
2829 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2835 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2838 identify_goto (tree decl
, const location_t
*locus
)
2841 permerror (input_location
, "jump to label %qD", decl
);
2843 permerror (input_location
, "jump to case label");
2845 permerror (*locus
, " from here");
2848 /* Check that a single previously seen jump to a newly defined label
2849 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2850 the jump context; NAMES are the names in scope in LEVEL at the jump
2851 context; LOCUS is the source position of the jump or 0. Returns
2852 true if all is well. */
2855 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2856 bool exited_omp
, const location_t
*locus
)
2858 cp_binding_level
*b
;
2859 bool identified
= false, saw_eh
= false, saw_omp
= false;
2863 identify_goto (decl
, locus
);
2864 error (" exits OpenMP structured block");
2865 identified
= saw_omp
= true;
2868 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2870 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2872 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2873 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2874 : TREE_CHAIN (new_decls
)))
2876 int problem
= decl_jump_unsafe (new_decls
);
2882 identify_goto (decl
, locus
);
2886 error (" crosses initialization of %q+#D", new_decls
);
2888 permerror (input_location
, " enters scope of %q+#D which has "
2889 "non-trivial destructor", new_decls
);
2894 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2898 identify_goto (decl
, locus
);
2901 if (b
->kind
== sk_try
)
2902 error (" enters try block");
2904 error (" enters catch block");
2907 if (b
->kind
== sk_omp
&& !saw_omp
)
2911 identify_goto (decl
, locus
);
2914 error (" enters OpenMP structured block");
2923 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2925 check_previous_goto_1 (decl
, use
->binding_level
,
2926 use
->names_in_scope
, use
->in_omp_scope
,
2927 &use
->o_goto_locus
);
2931 check_switch_goto (cp_binding_level
* level
)
2933 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2936 /* Check that a new jump to a label DECL is OK. Called by
2937 finish_goto_stmt. */
2940 check_goto (tree decl
)
2942 struct named_label_entry
*ent
, dummy
;
2943 bool saw_catch
= false, identified
= false;
2947 /* We can't know where a computed goto is jumping.
2948 So we assume that it's OK. */
2949 if (TREE_CODE (decl
) != LABEL_DECL
)
2952 /* We didn't record any information about this label when we created it,
2953 and there's not much point since it's trivial to analyze as a return. */
2954 if (decl
== cdtor_label
)
2957 dummy
.label_decl
= decl
;
2958 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2959 gcc_assert (ent
!= NULL
);
2961 /* If the label hasn't been defined yet, defer checking. */
2962 if (! DECL_INITIAL (decl
))
2964 struct named_label_use_entry
*new_use
;
2966 /* Don't bother creating another use if the last goto had the
2967 same data, and will therefore create the same set of errors. */
2969 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2972 new_use
= ggc_alloc
<named_label_use_entry
> ();
2973 new_use
->binding_level
= current_binding_level
;
2974 new_use
->names_in_scope
= current_binding_level
->names
;
2975 new_use
->o_goto_locus
= input_location
;
2976 new_use
->in_omp_scope
= false;
2978 new_use
->next
= ent
->uses
;
2979 ent
->uses
= new_use
;
2983 if (ent
->in_try_scope
|| ent
->in_catch_scope
2984 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2986 permerror (input_location
, "jump to label %q+D", decl
);
2987 permerror (input_location
, " from here");
2991 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2993 int u
= decl_jump_unsafe (bad
);
2995 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2997 /* Can't skip init of __exception_info. */
2998 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3002 error (" skips initialization of %q+#D", bad
);
3004 permerror (input_location
, " enters scope of %q+#D which has "
3005 "non-trivial destructor", bad
);
3008 if (ent
->in_try_scope
)
3009 error (" enters try block");
3010 else if (ent
->in_catch_scope
&& !saw_catch
)
3011 error (" enters catch block");
3013 if (ent
->in_omp_scope
)
3014 error (" enters OpenMP structured block");
3015 else if (flag_openmp
)
3017 cp_binding_level
*b
;
3018 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3020 if (b
== ent
->binding_level
)
3022 if (b
->kind
== sk_omp
)
3026 permerror (input_location
, "jump to label %q+D", decl
);
3027 permerror (input_location
, " from here");
3030 error (" exits OpenMP structured block");
3037 /* Check that a return is ok wrt OpenMP structured blocks.
3038 Called by finish_return_stmt. Returns true if all is well. */
3041 check_omp_return (void)
3043 cp_binding_level
*b
;
3044 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3045 if (b
->kind
== sk_omp
)
3047 error ("invalid exit from OpenMP structured block");
3050 else if (b
->kind
== sk_function_parms
)
3055 /* Define a label, specifying the location in the source file.
3056 Return the LABEL_DECL node for the label. */
3059 define_label_1 (location_t location
, tree name
)
3061 struct named_label_entry
*ent
, dummy
;
3062 cp_binding_level
*p
;
3065 decl
= lookup_label (name
);
3067 dummy
.label_decl
= decl
;
3068 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
3069 gcc_assert (ent
!= NULL
);
3071 /* After labels, make any new cleanups in the function go into their
3072 own new (temporary) binding contour. */
3073 for (p
= current_binding_level
;
3074 p
->kind
!= sk_function_parms
;
3076 p
->more_cleanups_ok
= 0;
3078 if (name
== get_identifier ("wchar_t"))
3079 permerror (input_location
, "label named wchar_t");
3081 if (DECL_INITIAL (decl
) != NULL_TREE
)
3083 error ("duplicate label %qD", decl
);
3084 return error_mark_node
;
3088 struct named_label_use_entry
*use
;
3090 /* Mark label as having been defined. */
3091 DECL_INITIAL (decl
) = error_mark_node
;
3092 /* Say where in the source. */
3093 DECL_SOURCE_LOCATION (decl
) = location
;
3095 ent
->binding_level
= current_binding_level
;
3096 ent
->names_in_scope
= current_binding_level
->names
;
3098 for (use
= ent
->uses
; use
; use
= use
->next
)
3099 check_previous_goto (decl
, use
);
3106 /* Wrapper for define_label_1. */
3109 define_label (location_t location
, tree name
)
3112 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3113 ret
= define_label_1 (location
, name
);
3114 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3121 cp_binding_level
*level
;
3122 struct cp_switch
*next
;
3123 /* The SWITCH_STMT being built. */
3125 /* A splay-tree mapping the low element of a case range to the high
3126 element, or NULL_TREE if there is no high element. Used to
3127 determine whether or not a new case label duplicates an old case
3128 label. We need a tree, rather than simply a hash table, because
3129 of the GNU case range extension. */
3133 /* A stack of the currently active switch statements. The innermost
3134 switch statement is on the top of the stack. There is no need to
3135 mark the stack for garbage collection because it is only active
3136 during the processing of the body of a function, and we never
3137 collect at that point. */
3139 static struct cp_switch
*switch_stack
;
3141 /* Called right after a switch-statement condition is parsed.
3142 SWITCH_STMT is the switch statement being parsed. */
3145 push_switch (tree switch_stmt
)
3147 struct cp_switch
*p
= XNEW (struct cp_switch
);
3148 p
->level
= current_binding_level
;
3149 p
->next
= switch_stack
;
3150 p
->switch_stmt
= switch_stmt
;
3151 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3158 struct cp_switch
*cs
= switch_stack
;
3159 location_t switch_location
;
3161 /* Emit warnings as needed. */
3162 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3163 if (!processing_template_decl
)
3164 c_do_switch_warnings (cs
->cases
, switch_location
,
3165 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3166 SWITCH_STMT_COND (cs
->switch_stmt
));
3168 splay_tree_delete (cs
->cases
);
3169 switch_stack
= switch_stack
->next
;
3173 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3174 condition. Note that if TYPE and VALUE are already integral we don't
3175 really do the conversion because the language-independent
3176 warning/optimization code will work better that way. */
3179 case_conversion (tree type
, tree value
)
3181 if (value
== NULL_TREE
)
3184 if (cxx_dialect
>= cxx11
3185 && (SCOPED_ENUM_P (type
)
3186 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3188 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3189 type
= type_promotes_to (type
);
3190 value
= (perform_implicit_conversion_flags
3191 (type
, value
, tf_warning_or_error
,
3192 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3194 return cxx_constant_value (value
);
3197 /* Note that we've seen a definition of a case label, and complain if this
3198 is a bad place for one. */
3201 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3204 cp_binding_level
*p
;
3207 if (processing_template_decl
)
3211 /* For templates, just add the case label; we'll do semantic
3212 analysis at instantiation-time. */
3213 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3214 return add_stmt (build_case_label (low_value
, high_value
, label
));
3217 /* Find the condition on which this switch statement depends. */
3218 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3219 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3220 cond
= TREE_VALUE (cond
);
3222 if (!check_switch_goto (switch_stack
->level
))
3223 return error_mark_node
;
3225 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3227 low_value
= case_conversion (type
, low_value
);
3228 high_value
= case_conversion (type
, high_value
);
3230 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3231 low_value
, high_value
);
3233 /* After labels, make any new cleanups in the function go into their
3234 own new (temporary) binding contour. */
3235 for (p
= current_binding_level
;
3236 p
->kind
!= sk_function_parms
;
3238 p
->more_cleanups_ok
= 0;
3243 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3246 typename_hash (const void* k
)
3249 const_tree
const t
= (const_tree
) k
;
3251 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3252 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3257 typedef struct typename_info
{
3265 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3266 really of type `typename_info*' */
3269 typename_compare (const void * k1
, const void * k2
)
3271 const_tree
const t1
= (const_tree
) k1
;
3272 const typename_info
*const t2
= (const typename_info
*) k2
;
3274 return (TYPE_IDENTIFIER (t1
) == t2
->name
3275 && TYPE_CONTEXT (t1
) == t2
->scope
3276 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3277 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3278 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3281 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3282 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3284 Returns the new TYPENAME_TYPE. */
3286 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3289 build_typename_type (tree context
, tree name
, tree fullname
,
3290 enum tag_types tag_type
)
3298 if (typename_htab
== NULL
)
3299 typename_htab
= htab_create_ggc (61, &typename_hash
,
3300 &typename_compare
, NULL
);
3302 ti
.scope
= FROB_CONTEXT (context
);
3304 ti
.template_id
= fullname
;
3305 ti
.enum_p
= tag_type
== enum_type
;
3306 ti
.class_p
= (tag_type
== class_type
3307 || tag_type
== record_type
3308 || tag_type
== union_type
);
3309 hash
= (htab_hash_pointer (ti
.scope
)
3310 ^ htab_hash_pointer (ti
.name
));
3312 /* See if we already have this type. */
3313 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3318 /* Build the TYPENAME_TYPE. */
3319 t
= cxx_make_type (TYPENAME_TYPE
);
3320 TYPE_CONTEXT (t
) = ti
.scope
;
3321 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3322 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3323 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3325 /* Build the corresponding TYPE_DECL. */
3326 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3327 TYPE_NAME (TREE_TYPE (d
)) = d
;
3328 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3329 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3330 DECL_ARTIFICIAL (d
) = 1;
3332 /* Store it in the hash table. */
3335 /* TYPENAME_TYPEs must always be compared structurally, because
3336 they may or may not resolve down to another type depending on
3337 the currently open classes. */
3338 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3344 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3345 provided to name the type. Returns an appropriate type, unless an
3346 error occurs, in which case error_mark_node is returned. If we
3347 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3348 return that, rather than the _TYPE it corresponds to, in other
3349 cases we look through the type decl. If TF_ERROR is set, complain
3350 about errors, otherwise be quiet. */
3353 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3354 tsubst_flags_t complain
)
3360 if (name
== error_mark_node
3361 || context
== NULL_TREE
3362 || context
== error_mark_node
)
3363 return error_mark_node
;
3367 if (!(TYPE_LANG_SPECIFIC (name
)
3368 && (CLASSTYPE_IS_TEMPLATE (name
)
3369 || CLASSTYPE_USE_TEMPLATE (name
))))
3370 name
= TYPE_IDENTIFIER (name
);
3372 /* Create a TEMPLATE_ID_EXPR for the type. */
3373 name
= build_nt (TEMPLATE_ID_EXPR
,
3374 CLASSTYPE_TI_TEMPLATE (name
),
3375 CLASSTYPE_TI_ARGS (name
));
3377 else if (TREE_CODE (name
) == TYPE_DECL
)
3378 name
= DECL_NAME (name
);
3382 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3384 name
= TREE_OPERAND (name
, 0);
3385 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3386 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3387 else if (TREE_CODE (name
) == OVERLOAD
)
3389 if (complain
& tf_error
)
3390 error ("%qD is not a type", name
);
3391 return error_mark_node
;
3394 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3396 if (complain
& tf_error
)
3397 error ("%qD used without template parameters", name
);
3398 return error_mark_node
;
3400 gcc_assert (identifier_p (name
));
3401 gcc_assert (TYPE_P (context
));
3403 if (!MAYBE_CLASS_TYPE_P (context
))
3405 if (complain
& tf_error
)
3406 error ("%q#T is not a class", context
);
3407 return error_mark_node
;
3410 /* When the CONTEXT is a dependent type, NAME could refer to a
3411 dependent base class of CONTEXT. But look inside it anyway
3412 if CONTEXT is a currently open scope, in case it refers to a
3413 member of the current instantiation or a non-dependent base;
3414 lookup will stop when we hit a dependent base. */
3415 if (!dependent_scope_p (context
))
3416 /* We should only set WANT_TYPE when we're a nested typename type.
3417 Then we can give better diagnostics if we find a non-type. */
3418 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3422 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3423 return build_typename_type (context
, name
, fullname
, tag_type
);
3425 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3429 if (complain
& tf_error
)
3430 error (want_template
? G_("no class template named %q#T in %q#T")
3431 : G_("no type named %q#T in %q#T"), name
, context
);
3432 return error_mark_node
;
3435 /* Pull out the template from an injected-class-name (or multiple). */
3437 t
= maybe_get_template_decl_from_type_decl (t
);
3439 if (TREE_CODE (t
) == TREE_LIST
)
3441 if (complain
& tf_error
)
3443 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3444 print_candidates (t
);
3446 return error_mark_node
;
3449 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3451 if (complain
& tf_error
)
3452 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3454 return error_mark_node
;
3456 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3458 if (complain
& tf_error
)
3459 error ("%<typename %T::%D%> names %q#T, which is not a type",
3461 return error_mark_node
;
3464 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3465 return error_mark_node
;
3467 /* If we are currently parsing a template and if T is a typedef accessed
3468 through CONTEXT then we need to remember and check access of T at
3469 template instantiation time. */
3470 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3473 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3475 /*entering_scope=*/0,
3476 tf_warning_or_error
| tf_user
);
3478 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3481 maybe_record_typedef_use (t
);
3486 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3487 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3488 in which case error_mark_node is returned.
3490 If PARM_LIST is non-NULL, also make sure that the template parameter
3491 list of TEMPLATE_DECL matches.
3493 If COMPLAIN zero, don't complain about any errors that occur. */
3496 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3497 tsubst_flags_t complain
)
3503 name
= TYPE_IDENTIFIER (name
);
3504 else if (DECL_P (name
))
3505 name
= DECL_NAME (name
);
3506 gcc_assert (identifier_p (name
));
3508 if (!dependent_type_p (context
)
3509 || currently_open_class (context
))
3511 tree tmpl
= NULL_TREE
;
3513 if (MAYBE_CLASS_TYPE_P (context
))
3514 tmpl
= lookup_field (context
, name
, 0, false);
3516 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3517 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3519 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3521 if (complain
& tf_error
)
3522 error ("no class template named %q#T in %q#T", name
, context
);
3523 return error_mark_node
;
3527 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3529 if (complain
& tf_error
)
3531 error ("template parameters do not match template %qD", tmpl
);
3532 inform (DECL_SOURCE_LOCATION (tmpl
),
3533 "%qD declared here", tmpl
);
3535 return error_mark_node
;
3538 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3540 return error_mark_node
;
3545 /* Build the UNBOUND_CLASS_TEMPLATE. */
3546 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3547 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3548 TREE_TYPE (t
) = NULL_TREE
;
3549 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3551 /* Build the corresponding TEMPLATE_DECL. */
3552 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3553 TYPE_NAME (TREE_TYPE (d
)) = d
;
3554 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3555 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3556 DECL_ARTIFICIAL (d
) = 1;
3557 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3564 /* Push the declarations of builtin types into the namespace.
3565 RID_INDEX is the index of the builtin type in the array
3566 RID_POINTERS. NAME is the name used when looking up the builtin
3567 type. TYPE is the _TYPE node for the builtin type. */
3570 record_builtin_type (enum rid rid_index
,
3574 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3575 tree tdecl
= NULL_TREE
;
3577 if ((int) rid_index
< (int) RID_MAX
)
3578 rname
= ridpointers
[(int) rid_index
];
3580 tname
= get_identifier (name
);
3582 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3583 eliminated. Built-in types should not be looked up name; their
3584 names are keywords that the parser can recognize. However, there
3585 is code in c-common.c that uses identifier_global_value to look
3586 up built-in types by name. */
3589 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3590 DECL_ARTIFICIAL (tdecl
) = 1;
3591 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3597 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3598 DECL_ARTIFICIAL (tdecl
) = 1;
3600 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3603 if (!TYPE_NAME (type
))
3604 TYPE_NAME (type
) = tdecl
;
3607 debug_hooks
->type_decl (tdecl
, 0);
3610 /* Record one of the standard Java types.
3611 * Declare it as having the given NAME.
3612 * If SIZE > 0, it is the size of one of the integral types;
3613 * otherwise it is the negative of the size of one of the other types. */
3616 record_builtin_java_type (const char* name
, int size
)
3621 type
= build_nonstandard_integer_type (size
, 0);
3622 type
= build_distinct_type_copy (type
);
3624 else if (size
> -32)
3627 /* "__java_char" or ""__java_boolean". */
3628 type
= build_nonstandard_integer_type (-size
, 1);
3629 type
= build_distinct_type_copy (type
);
3630 /* Get the signed type cached and attached to the unsigned type,
3631 so it doesn't get garbage-collected at "random" times,
3632 causing potential codegen differences out of different UIDs
3633 and different alias set numbers. */
3634 stype
= build_nonstandard_integer_type (-size
, 0);
3635 stype
= build_distinct_type_copy (stype
);
3636 TREE_CHAIN (type
) = stype
;
3637 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3640 { /* "__java_float" or ""__java_double". */
3641 type
= make_node (REAL_TYPE
);
3642 TYPE_PRECISION (type
) = - size
;
3645 record_builtin_type (RID_MAX
, name
, type
);
3646 decl
= TYPE_NAME (type
);
3648 /* Suppress generate debug symbol entries for these types,
3649 since for normal C++ they are just clutter.
3650 However, push_lang_context undoes this if extern "Java" is seen. */
3651 DECL_IGNORED_P (decl
) = 1;
3653 TYPE_FOR_JAVA (type
) = 1;
3657 /* Push a type into the namespace so that the back ends ignore it. */
3660 record_unknown_type (tree type
, const char* name
)
3662 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3663 TYPE_DECL
, get_identifier (name
), type
));
3664 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3665 DECL_IGNORED_P (decl
) = 1;
3666 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3667 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3668 TYPE_ALIGN (type
) = 1;
3669 TYPE_USER_ALIGN (type
) = 0;
3670 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3673 /* A string for which we should create an IDENTIFIER_NODE at
3676 typedef struct predefined_identifier
3678 /* The name of the identifier. */
3679 const char *const name
;
3680 /* The place where the IDENTIFIER_NODE should be stored. */
3682 /* Nonzero if this is the name of a constructor or destructor. */
3683 const int ctor_or_dtor_p
;
3684 } predefined_identifier
;
3686 /* Create all the predefined identifiers. */
3689 initialize_predefined_identifiers (void)
3691 const predefined_identifier
*pid
;
3693 /* A table of identifiers to create at startup. */
3694 static const predefined_identifier predefined_identifiers
[] = {
3695 { "C++", &lang_name_cplusplus
, 0 },
3696 { "C", &lang_name_c
, 0 },
3697 { "Java", &lang_name_java
, 0 },
3698 /* Some of these names have a trailing space so that it is
3699 impossible for them to conflict with names written by users. */
3700 { "__ct ", &ctor_identifier
, 1 },
3701 { "__base_ctor ", &base_ctor_identifier
, 1 },
3702 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3703 { "__dt ", &dtor_identifier
, 1 },
3704 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3705 { "__base_dtor ", &base_dtor_identifier
, 1 },
3706 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3707 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3708 { "nelts", &nelts_identifier
, 0 },
3709 { THIS_NAME
, &this_identifier
, 0 },
3710 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3711 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3712 { "_vptr", &vptr_identifier
, 0 },
3713 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3714 { "::", &global_scope_name
, 0 },
3715 { "std", &std_identifier
, 0 },
3719 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3721 *pid
->node
= get_identifier (pid
->name
);
3722 if (pid
->ctor_or_dtor_p
)
3723 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3727 /* Create the predefined scalar types of C,
3728 and some nodes representing standard constants (0, 1, (void *)0).
3729 Initialize the global binding level.
3730 Make definitions for built-in primitive functions. */
3733 cxx_init_decl_processing (void)
3736 tree void_ftype_ptr
;
3738 /* Create all the identifiers we need. */
3739 initialize_predefined_identifiers ();
3741 /* Create the global variables. */
3742 push_to_top_level ();
3744 current_function_decl
= NULL_TREE
;
3745 current_binding_level
= NULL
;
3746 /* Enter the global namespace. */
3747 gcc_assert (global_namespace
== NULL_TREE
);
3748 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3750 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3751 TREE_PUBLIC (global_namespace
) = 1;
3752 begin_scope (sk_namespace
, global_namespace
);
3754 if (flag_visibility_ms_compat
)
3755 default_visibility
= VISIBILITY_HIDDEN
;
3758 current_lang_name
= lang_name_c
;
3760 /* Create the `std' namespace. */
3761 push_namespace (std_identifier
);
3762 std_node
= current_namespace
;
3765 c_common_nodes_and_builtins ();
3767 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3768 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3769 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3770 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3771 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3772 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3773 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3774 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3776 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3778 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3779 truthvalue_type_node
= boolean_type_node
;
3780 truthvalue_false_node
= boolean_false_node
;
3781 truthvalue_true_node
= boolean_true_node
;
3783 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3784 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3785 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3788 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3791 delta_type_node
= ptrdiff_type_node
;
3792 vtable_index_type
= ptrdiff_type_node
;
3794 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3795 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3796 void_ftype_ptr
= build_function_type_list (void_type_node
,
3797 ptr_type_node
, NULL_TREE
);
3799 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3801 /* C++ extensions */
3803 unknown_type_node
= make_node (LANG_TYPE
);
3804 record_unknown_type (unknown_type_node
, "unknown type");
3806 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3807 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3809 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3811 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3812 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3814 init_list_type_node
= make_node (LANG_TYPE
);
3815 record_unknown_type (init_list_type_node
, "init list");
3818 /* Make sure we get a unique function type, so we can give
3819 its pointer type a name. (This wins for gdb.) */
3820 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3821 TREE_TYPE (vfunc_type
) = integer_type_node
;
3822 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3823 layout_type (vfunc_type
);
3825 vtable_entry_type
= build_pointer_type (vfunc_type
);
3827 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3830 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3831 layout_type (vtbl_type_node
);
3832 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3833 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3834 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3835 layout_type (vtbl_ptr_type_node
);
3836 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3838 push_namespace (get_identifier ("__cxxabiv1"));
3839 abi_node
= current_namespace
;
3842 global_type_node
= make_node (LANG_TYPE
);
3843 record_unknown_type (global_type_node
, "global type");
3846 current_lang_name
= lang_name_cplusplus
;
3849 tree newattrs
, extvisattr
;
3850 tree newtype
, deltype
;
3851 tree ptr_ftype_sizetype
;
3855 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3856 if (cxx_dialect
== cxx98
)
3859 tree bad_alloc_type_node
;
3860 tree bad_alloc_decl
;
3862 push_namespace (std_identifier
);
3863 bad_alloc_id
= get_identifier ("bad_alloc");
3864 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3865 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3867 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3868 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3872 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3875 new_eh_spec
= noexcept_false_spec
;
3877 /* Ensure attribs.c is initialized. */
3879 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3881 newattrs
= tree_cons (get_identifier ("alloc_size"),
3882 build_tree_list (NULL_TREE
, integer_one_node
),
3884 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3885 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3886 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3887 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3888 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3889 DECL_IS_MALLOC (opnew
) = 1;
3890 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3891 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3892 DECL_IS_MALLOC (opnew
) = 1;
3893 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3894 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3895 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3897 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3898 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3899 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3900 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3901 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3902 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3903 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3904 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3908 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3909 ECF_NORETURN
| ECF_NOTHROW
);
3911 /* Perform other language dependent initializations. */
3912 init_class_processing ();
3913 init_rtti_processing ();
3914 init_template_processing ();
3916 if (flag_exceptions
)
3917 init_exception_processing ();
3919 if (! supports_one_only ())
3922 make_fname_decl
= cp_make_fname_decl
;
3923 start_fname_decls ();
3925 /* Show we use EH for cleanups. */
3926 if (flag_exceptions
)
3927 using_eh_for_cleanups ();
3930 /* Generate an initializer for a function naming variable from
3931 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3932 filled in with the type of the init. */
3935 cp_fname_init (const char* name
, tree
*type_p
)
3937 tree domain
= NULL_TREE
;
3939 tree init
= NULL_TREE
;
3944 length
= strlen (name
);
3945 domain
= build_index_type (size_int (length
));
3946 init
= build_string (length
+ 1, name
);
3949 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3950 type
= build_cplus_array_type (type
, domain
);
3955 TREE_TYPE (init
) = type
;
3957 init
= error_mark_node
;
3962 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3963 the decl, LOC is the location to give the decl, NAME is the
3964 initialization string and TYPE_DEP indicates whether NAME depended
3965 on the type of the function. We make use of that to detect
3966 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3967 at the point of first use, so we mustn't push the decl now. */
3970 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3972 const char *const name
= (type_dep
&& processing_template_decl
3973 ? NULL
: fname_as_string (type_dep
));
3975 tree init
= cp_fname_init (name
, &type
);
3976 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3979 free (CONST_CAST (char *, name
));
3981 /* As we're using pushdecl_with_scope, we must set the context. */
3982 DECL_CONTEXT (decl
) = current_function_decl
;
3984 TREE_STATIC (decl
) = 1;
3985 TREE_READONLY (decl
) = 1;
3986 DECL_ARTIFICIAL (decl
) = 1;
3988 TREE_USED (decl
) = 1;
3990 if (current_function_decl
)
3992 cp_binding_level
*b
= current_binding_level
;
3993 if (b
->kind
== sk_function_parms
)
3994 return error_mark_node
;
3995 while (b
->level_chain
->kind
!= sk_function_parms
)
3997 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3998 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3999 LOOKUP_ONLYCONVERTING
);
4003 DECL_THIS_STATIC (decl
) = true;
4004 pushdecl_top_level_and_finish (decl
, init
);
4011 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4013 tree id
= DECL_NAME (decl
);
4014 const char *name
= IDENTIFIER_POINTER (id
);
4016 retrofit_lang_decl (decl
);
4018 DECL_ARTIFICIAL (decl
) = 1;
4019 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4020 SET_DECL_LANGUAGE (decl
, lang_c
);
4021 /* Runtime library routines are, by definition, available in an
4022 external shared object. */
4023 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4024 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4026 DECL_CONTEXT (decl
) = context
;
4029 pushdecl_top_level (decl
);
4033 /* A function in the user's namespace should have an explicit
4034 declaration before it is used. Mark the built-in function as
4035 anticipated but not actually declared. */
4036 if (name
[0] != '_' || name
[1] != '_')
4037 DECL_ANTICIPATED (decl
) = 1;
4038 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4040 size_t len
= strlen (name
);
4042 /* Treat __*_chk fortification functions as anticipated as well,
4043 unless they are __builtin_*. */
4044 if (len
> strlen ("___chk")
4045 && memcmp (name
+ len
- strlen ("_chk"),
4046 "_chk", strlen ("_chk") + 1) == 0)
4047 DECL_ANTICIPATED (decl
) = 1;
4054 cxx_builtin_function (tree decl
)
4056 tree id
= DECL_NAME (decl
);
4057 const char *name
= IDENTIFIER_POINTER (id
);
4058 /* All builtins that don't begin with an '_' should additionally
4059 go in the 'std' namespace. */
4062 tree decl2
= copy_node(decl
);
4063 push_namespace (std_identifier
);
4064 builtin_function_1 (decl2
, std_node
, false);
4068 return builtin_function_1 (decl
, NULL_TREE
, false);
4071 /* Like cxx_builtin_function, but guarantee the function is added to the global
4072 scope. This is to allow function specific options to add new machine
4073 dependent builtins when the target ISA changes via attribute((target(...)))
4074 which saves space on program startup if the program does not use non-generic
4078 cxx_builtin_function_ext_scope (tree decl
)
4081 tree id
= DECL_NAME (decl
);
4082 const char *name
= IDENTIFIER_POINTER (id
);
4083 /* All builtins that don't begin with an '_' should additionally
4084 go in the 'std' namespace. */
4087 tree decl2
= copy_node(decl
);
4088 push_namespace (std_identifier
);
4089 builtin_function_1 (decl2
, std_node
, true);
4093 return builtin_function_1 (decl
, NULL_TREE
, true);
4096 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4097 function. Not called directly. */
4100 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4103 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4104 DECL_EXTERNAL (fn
) = 1;
4105 TREE_PUBLIC (fn
) = 1;
4106 DECL_ARTIFICIAL (fn
) = 1;
4107 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4108 SET_DECL_LANGUAGE (fn
, lang_c
);
4109 /* Runtime library routines are, by definition, available in an
4110 external shared object. */
4111 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4112 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4113 set_call_expr_flags (fn
, ecf_flags
);
4117 /* Returns the _DECL for a library function with C++ linkage. */
4120 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4123 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4124 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4125 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4129 /* Like build_library_fn, but takes a C string instead of an
4133 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4135 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4138 /* Like build_cp_library_fn, but takes a C string instead of an
4142 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4144 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4148 /* Like build_library_fn, but also pushes the function so that we will
4149 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4150 may throw exceptions listed in RAISES. */
4153 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4158 type
= build_exception_variant (type
, raises
);
4160 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4161 pushdecl_top_level (fn
);
4165 /* Like build_cp_library_fn, but also pushes the function so that it
4166 will be found by normal lookup. */
4169 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4172 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4177 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4181 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4185 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4187 tree type
= build_function_type (void_type_node
, parmtypes
);
4188 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4191 /* Like push_library_fn, but also note that this function throws
4192 and does not return. Used for __throw_foo and the like. */
4195 push_throw_library_fn (tree name
, tree type
)
4197 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4201 /* When we call finish_struct for an anonymous union, we create
4202 default copy constructors and such. But, an anonymous union
4203 shouldn't have such things; this function undoes the damage to the
4204 anonymous union type T.
4206 (The reason that we create the synthesized methods is that we don't
4207 distinguish `union { int i; }' from `typedef union { int i; } U'.
4208 The first is an anonymous union; the second is just an ordinary
4212 fixup_anonymous_aggr (tree t
)
4216 /* Wipe out memory of synthesized methods. */
4217 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4218 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4219 TYPE_HAS_COPY_CTOR (t
) = 0;
4220 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4221 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4222 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4224 /* Splice the implicitly generated functions out of the TYPE_METHODS
4226 q
= &TYPE_METHODS (t
);
4229 if (DECL_ARTIFICIAL (*q
))
4230 *q
= TREE_CHAIN (*q
);
4232 q
= &DECL_CHAIN (*q
);
4235 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4236 if (TYPE_METHODS (t
))
4238 tree decl
= TYPE_MAIN_DECL (t
);
4240 if (TREE_CODE (t
) != UNION_TYPE
)
4241 error_at (DECL_SOURCE_LOCATION (decl
),
4242 "an anonymous struct cannot have function members");
4244 error_at (DECL_SOURCE_LOCATION (decl
),
4245 "an anonymous union cannot have function members");
4248 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4249 assignment operators (because they cannot have these methods themselves).
4250 For anonymous unions this is already checked because they are not allowed
4251 in any union, otherwise we have to check it. */
4252 if (TREE_CODE (t
) != UNION_TYPE
)
4256 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4257 if (TREE_CODE (field
) == FIELD_DECL
)
4259 type
= TREE_TYPE (field
);
4260 if (CLASS_TYPE_P (type
))
4262 if (TYPE_NEEDS_CONSTRUCTING (type
))
4263 error ("member %q+#D with constructor not allowed "
4264 "in anonymous aggregate", field
);
4265 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4266 error ("member %q+#D with destructor not allowed "
4267 "in anonymous aggregate", field
);
4268 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4269 error ("member %q+#D with copy assignment operator "
4270 "not allowed in anonymous aggregate", field
);
4276 /* Warn for an attribute located at LOCATION that appertains to the
4277 class type CLASS_TYPE that has not been properly placed after its
4278 class-key, in it class-specifier. */
4281 warn_misplaced_attr_for_class_type (source_location location
,
4284 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4286 if (warning_at (location
, OPT_Wattributes
,
4287 "attribute ignored in declaration "
4288 "of %q#T", class_type
))
4290 "attribute for %q#T must follow the %qs keyword",
4291 class_type
, class_key_or_enum_as_string (class_type
));
4294 /* Make sure that a declaration with no declarator is well-formed, i.e.
4295 just declares a tagged type or anonymous union.
4297 Returns the type declared; or NULL_TREE if none. */
4300 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4301 bool explicit_type_instantiation_p
)
4303 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4304 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4305 /* If a class, struct, or enum type is declared by the DECLSPECS
4306 (i.e, if a class-specifier, enum-specifier, or non-typename
4307 elaborated-type-specifier appears in the DECLSPECS),
4308 DECLARED_TYPE is set to the corresponding type. */
4309 tree declared_type
= NULL_TREE
;
4310 bool error_p
= false;
4312 if (declspecs
->multiple_types_p
)
4313 error ("multiple types in one declaration");
4314 else if (declspecs
->redefined_builtin_type
)
4316 if (!in_system_header_at (input_location
))
4317 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4318 "redeclaration of C++ built-in type %qT",
4319 declspecs
->redefined_builtin_type
);
4324 && TYPE_P (declspecs
->type
)
4325 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4326 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4327 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4328 declared_type
= declspecs
->type
;
4329 else if (declspecs
->type
== error_mark_node
)
4331 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4332 permerror (input_location
, "declaration does not declare anything");
4333 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4335 error ("%<auto%> can only be specified for variables "
4336 "or function declarations");
4337 return error_mark_node
;
4339 /* Check for an anonymous union. */
4340 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4341 && TYPE_ANONYMOUS_P (declared_type
))
4343 /* 7/3 In a simple-declaration, the optional init-declarator-list
4344 can be omitted only when declaring a class (clause 9) or
4345 enumeration (7.2), that is, when the decl-specifier-seq contains
4346 either a class-specifier, an elaborated-type-specifier with
4347 a class-key (9.1), or an enum-specifier. In these cases and
4348 whenever a class-specifier or enum-specifier is present in the
4349 decl-specifier-seq, the identifiers in these specifiers are among
4350 the names being declared by the declaration (as class-name,
4351 enum-names, or enumerators, depending on the syntax). In such
4352 cases, and except for the declaration of an unnamed bit-field (9.6),
4353 the decl-specifier-seq shall introduce one or more names into the
4354 program, or shall redeclare a name introduced by a previous
4355 declaration. [Example:
4356 enum { }; // ill-formed
4357 typedef class { }; // ill-formed
4361 error ("missing type-name in typedef-declaration");
4364 /* Anonymous unions are objects, so they can have specifiers. */;
4365 SET_ANON_AGGR_TYPE_P (declared_type
);
4367 if (TREE_CODE (declared_type
) != UNION_TYPE
4368 && !in_system_header_at (input_location
))
4369 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4374 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4375 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4376 error ("%qs can only be specified for functions",
4377 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4378 ? "inline" : "virtual");
4380 && (!current_class_type
4381 || current_scope () != current_class_type
))
4382 error ("%<friend%> can only be specified inside a class");
4383 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4384 error ("%<explicit%> can only be specified for constructors");
4385 else if (declspecs
->storage_class
)
4386 error ("a storage class can only be specified for objects "
4388 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4389 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4390 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4391 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4392 error ("qualifiers can only be specified for objects "
4394 else if (saw_typedef
)
4395 warning (0, "%<typedef%> was ignored in this declaration");
4396 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4397 error ("%<constexpr%> cannot be used for type declarations");
4400 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4403 if (!CLASS_TYPE_P (declared_type
)
4404 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4405 /* For a non-template class, use the name location. */
4406 loc
= location_of (declared_type
);
4408 /* For a template class (an explicit instantiation), use the
4409 current location. */
4410 loc
= input_location
;
4412 if (explicit_type_instantiation_p
)
4413 /* [dcl.attr.grammar]/4:
4415 No attribute-specifier-seq shall appertain to an explicit
4418 if (warning_at (loc
, OPT_Wattributes
,
4419 "attribute ignored in explicit instantiation %q#T",
4422 "no attribute can be applied to "
4423 "an explicit instantiation");
4426 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4429 return declared_type
;
4432 /* Called when a declaration is seen that contains no names to declare.
4433 If its type is a reference to a structure, union or enum inherited
4434 from a containing scope, shadow that tag name for the current scope
4435 with a forward reference.
4436 If its type defines a new named structure or union
4437 or defines an enum, it is valid but we need not do anything here.
4438 Otherwise, it is an error.
4440 C++: may have to grok the declspecs to learn about static,
4441 complain for anonymous unions.
4443 Returns the TYPE declared -- or NULL_TREE if none. */
4446 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4448 tree t
= check_tag_decl (declspecs
,
4449 /*explicit_type_instantiation_p=*/false);
4454 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4457 /* This is where the variables in an anonymous union are
4458 declared. An anonymous union declaration looks like:
4460 because there is no declarator after the union, the parser
4461 sends that declaration here. */
4462 if (ANON_AGGR_TYPE_P (t
))
4464 fixup_anonymous_aggr (t
);
4466 if (TYPE_FIELDS (t
))
4468 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4469 declspecs
, NORMAL
, 0, NULL
);
4470 finish_anon_union (decl
);
4477 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4480 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4481 const cp_declarator
*declarator
,
4482 bool is_template_arg
)
4486 enum decl_context context
4487 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4488 attrs
= type_specifiers
->attributes
;
4489 type_specifiers
->attributes
= NULL_TREE
;
4490 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4491 if (attrs
&& type
!= error_mark_node
)
4493 if (CLASS_TYPE_P (type
))
4494 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4495 "outside of definition", type
);
4496 else if (MAYBE_CLASS_TYPE_P (type
))
4497 /* A template type parameter or other dependent type. */
4498 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4499 "type %qT without an associated declaration", type
);
4501 cplus_decl_attributes (&type
, attrs
, 0);
4506 /* Process a DECLARATOR for a function-scope variable declaration,
4507 namespace-scope variable declaration, or function declaration.
4508 (Function definitions go through start_function; class member
4509 declarations appearing in the body of the class go through
4510 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4511 If an error occurs, the error_mark_node is returned instead.
4513 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4514 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4515 for an explicitly defaulted function, or SD_DELETED for an explicitly
4516 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4517 implicitly initialized via a default constructor. ATTRIBUTES and
4518 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4520 The scope represented by the context of the returned DECL is pushed
4521 (if it is not the global namespace) and is assigned to
4522 *PUSHED_SCOPE_P. The caller is then responsible for calling
4523 pop_scope on *PUSHED_SCOPE_P if it is set. */
4526 start_decl (const cp_declarator
*declarator
,
4527 cp_decl_specifier_seq
*declspecs
,
4530 tree prefix_attributes
,
4531 tree
*pushed_scope_p
)
4539 *pushed_scope_p
= NULL_TREE
;
4541 /* An object declared as __attribute__((deprecated)) suppresses
4542 warnings of uses of other deprecated items. */
4543 if (lookup_attribute ("deprecated", attributes
))
4544 deprecated_state
= DEPRECATED_SUPPRESS
;
4546 attributes
= chainon (attributes
, prefix_attributes
);
4548 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4551 deprecated_state
= DEPRECATED_NORMAL
;
4553 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4554 || decl
== error_mark_node
)
4555 return error_mark_node
;
4557 context
= CP_DECL_CONTEXT (decl
);
4558 if (context
!= global_namespace
)
4559 *pushed_scope_p
= push_scope (context
);
4562 /* Is it valid for this decl to have an initializer at all?
4563 If not, set INITIALIZED to zero, which will indirectly
4564 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4565 switch (TREE_CODE (decl
))
4568 error ("typedef %qD is initialized (use decltype instead)", decl
);
4569 return error_mark_node
;
4572 if (initialized
== SD_DELETED
)
4573 /* We'll handle the rest of the semantics later, but we need to
4574 set this now so it's visible to duplicate_decls. */
4575 DECL_DELETED_FN (decl
) = 1;
4584 if (! toplevel_bindings_p ()
4585 && DECL_EXTERNAL (decl
))
4586 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4588 DECL_EXTERNAL (decl
) = 0;
4589 if (toplevel_bindings_p ())
4590 TREE_STATIC (decl
) = 1;
4592 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4594 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4595 record_key_method_defined (decl
);
4597 /* If this is a typedef that names the class for linkage purposes
4598 (7.1.3p8), apply any attributes directly to the type. */
4599 if (TREE_CODE (decl
) == TYPE_DECL
4600 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4601 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4602 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4606 /* Set attributes here so if duplicate decl, will have proper attributes. */
4607 cplus_decl_attributes (&decl
, attributes
, flags
);
4609 /* Dllimported symbols cannot be defined. Static data members (which
4610 can be initialized in-class and dllimported) go through grokfield,
4611 not here, so we don't need to exclude those decls when checking for
4613 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4615 error ("definition of %q#D is marked %<dllimport%>", decl
);
4616 DECL_DLLIMPORT_P (decl
) = 0;
4619 /* If #pragma weak was used, mark the decl weak now. */
4620 if (!processing_template_decl
)
4621 maybe_apply_pragma_weak (decl
);
4623 if (TREE_CODE (decl
) == FUNCTION_DECL
4624 && DECL_DECLARED_INLINE_P (decl
)
4625 && DECL_UNINLINABLE (decl
)
4626 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4627 warning (0, "inline function %q+D given attribute noinline", decl
);
4629 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4633 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4634 if (field
== NULL_TREE
|| !VAR_P (field
))
4635 error ("%q#D is not a static member of %q#T", decl
, context
);
4638 if (DECL_CONTEXT (field
) != context
)
4640 if (!same_type_p (DECL_CONTEXT (field
), context
))
4641 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4642 "to be defined as %<%T::%D%>",
4643 DECL_CONTEXT (field
), DECL_NAME (decl
),
4644 context
, DECL_NAME (decl
));
4645 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4647 /* Static data member are tricky; an in-class initialization
4648 still doesn't provide a definition, so the in-class
4649 declaration will have DECL_EXTERNAL set, but will have an
4650 initialization. Thus, duplicate_decls won't warn
4651 about this situation, and so we check here. */
4652 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4653 error ("duplicate initialization of %qD", decl
);
4654 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4656 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4657 && !DECL_DECLARED_CONSTEXPR_P (field
))
4658 error ("%qD declared %<constexpr%> outside its class", field
);
4663 tree field
= check_classfn (context
, decl
,
4664 (processing_template_decl
4665 > template_class_depth (context
))
4666 ? current_template_parms
4668 if (field
&& field
!= error_mark_node
4669 && duplicate_decls (decl
, field
,
4670 /*newdecl_is_friend=*/false))
4674 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4675 DECL_IN_AGGR_P (decl
) = 0;
4676 /* Do not mark DECL as an explicit specialization if it was not
4677 already marked as an instantiation; a declaration should
4678 never be marked as a specialization unless we know what
4679 template is being specialized. */
4680 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4682 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4684 /* [temp.expl.spec] An explicit specialization of a static data
4685 member of a template is a definition if the declaration
4686 includes an initializer; otherwise, it is a declaration.
4688 We check for processing_specialization so this only applies
4689 to the new specialization syntax. */
4690 if (!initialized
&& processing_specialization
)
4691 DECL_EXTERNAL (decl
) = 1;
4694 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4695 /* Aliases are definitions. */
4697 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4701 was_public
= TREE_PUBLIC (decl
);
4703 /* Enter this declaration into the symbol table. */
4704 decl
= maybe_push_decl (decl
);
4706 if (processing_template_decl
)
4707 decl
= push_template_decl (decl
);
4708 if (decl
== error_mark_node
)
4709 return error_mark_node
;
4712 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4713 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4715 /* This is a const variable with implicit 'static'. Set
4716 DECL_THIS_STATIC so we can tell it from variables that are
4717 !TREE_PUBLIC because of the anonymous namespace. */
4718 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4719 DECL_THIS_STATIC (decl
) = 1;
4722 if (!processing_template_decl
&& VAR_P (decl
))
4723 start_decl_1 (decl
, initialized
);
4728 /* Process the declaration of a variable DECL. INITIALIZED is true
4729 iff DECL is explicitly initialized. (INITIALIZED is false if the
4730 variable is initialized via an implicitly-called constructor.)
4731 This function must be called for ordinary variables (including, for
4732 example, implicit instantiations of templates), but must not be
4733 called for template declarations. */
4736 start_decl_1 (tree decl
, bool initialized
)
4740 bool aggregate_definition_p
;
4742 gcc_assert (!processing_template_decl
);
4744 if (error_operand_p (decl
))
4747 gcc_assert (VAR_P (decl
));
4749 type
= TREE_TYPE (decl
);
4750 complete_p
= COMPLETE_TYPE_P (type
);
4751 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4753 /* If an explicit initializer is present, or if this is a definition
4754 of an aggregate, then we need a complete type at this point.
4755 (Scalars are always complete types, so there is nothing to
4756 check.) This code just sets COMPLETE_P; errors (if necessary)
4757 are issued below. */
4758 if ((initialized
|| aggregate_definition_p
)
4760 && COMPLETE_TYPE_P (complete_type (type
)))
4763 /* We will not yet have set TREE_READONLY on DECL if the type
4764 was "const", but incomplete, before this point. But, now, we
4765 have a complete type, so we can try again. */
4766 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4770 /* Is it valid for this decl to have an initializer at all? */
4772 /* Don't allow initializations for incomplete types except for
4773 arrays which might be completed by the initialization. */
4775 ; /* A complete type is ok. */
4776 else if (type_uses_auto (type
))
4777 ; /* An auto type is ok. */
4778 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4780 error ("variable %q#D has initializer but incomplete type", decl
);
4781 type
= TREE_TYPE (decl
) = error_mark_node
;
4783 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4785 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4786 error ("elements of array %q#D have incomplete type", decl
);
4787 /* else we already gave an error in start_decl. */
4790 else if (aggregate_definition_p
&& !complete_p
)
4792 if (type_uses_auto (type
))
4793 error ("declaration of %q#D has no initializer", decl
);
4795 error ("aggregate %q#D has incomplete type and cannot be defined",
4797 /* Change the type so that assemble_variable will give
4798 DECL an rtl we can live with: (mem (const_int 0)). */
4799 type
= TREE_TYPE (decl
) = error_mark_node
;
4802 /* Create a new scope to hold this declaration if necessary.
4803 Whether or not a new scope is necessary cannot be determined
4804 until after the type has been completed; if the type is a
4805 specialization of a class template it is not until after
4806 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4807 will be set correctly. */
4808 maybe_push_cleanup_level (type
);
4811 /* Handle initialization of references. DECL, TYPE, and INIT have the
4812 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4813 but will be set to a new CLEANUP_STMT if a temporary is created
4814 that must be destroyed subsequently.
4816 Returns an initializer expression to use to initialize DECL, or
4817 NULL if the initialization can be performed statically.
4819 Quotes on semantics can be found in ARM 8.4.3. */
4822 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4824 if (init
== NULL_TREE
)
4826 if ((DECL_LANG_SPECIFIC (decl
) == 0
4827 || DECL_IN_AGGR_P (decl
) == 0)
4828 && ! DECL_THIS_EXTERN (decl
))
4829 error ("%qD declared as reference but not initialized", decl
);
4833 if (TREE_CODE (init
) == TREE_LIST
)
4834 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4835 tf_warning_or_error
);
4837 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4838 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4839 /* Note: default conversion is only called in very special cases. */
4840 init
= decay_conversion (init
, tf_warning_or_error
);
4842 /* Convert INIT to the reference type TYPE. This may involve the
4843 creation of a temporary, whose lifetime must be the same as that
4844 of the reference. If so, a DECL_EXPR for the temporary will be
4845 added just after the DECL_EXPR for DECL. That's why we don't set
4846 DECL_INITIAL for local references (instead assigning to them
4847 explicitly); we need to allow the temporary to be initialized
4849 return initialize_reference (type
, init
, flags
,
4850 tf_warning_or_error
);
4853 /* Designated initializers in arrays are not supported in GNU C++.
4854 The parser cannot detect this error since it does not know whether
4855 a given brace-enclosed initializer is for a class type or for an
4856 array. This function checks that CE does not use a designated
4857 initializer. If it does, an error is issued. Returns true if CE
4858 is valid, i.e., does not have a designated initializer. */
4861 check_array_designated_initializer (constructor_elt
*ce
,
4862 unsigned HOST_WIDE_INT index
)
4864 /* Designated initializers for array elements are not supported. */
4867 /* The parser only allows identifiers as designated
4869 if (ce
->index
== error_mark_node
)
4871 error ("name used in a GNU-style designated "
4872 "initializer for an array");
4875 else if (identifier_p (ce
->index
))
4877 error ("name %qD used in a GNU-style designated "
4878 "initializer for an array", ce
->index
);
4882 ce
->index
= cxx_constant_value (ce
->index
);
4884 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4886 /* A C99 designator is OK if it matches the current index. */
4887 if (wi::eq_p (ce
->index
, index
))
4890 sorry ("non-trivial designated initializers not supported");
4901 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4902 array until we finish parsing the initializer. If that's the
4903 situation we're in, update DECL accordingly. */
4906 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4908 tree type
= TREE_TYPE (decl
);
4910 if (TREE_CODE (type
) == ARRAY_TYPE
4911 && TYPE_DOMAIN (type
) == NULL_TREE
4912 && TREE_CODE (decl
) != TYPE_DECL
)
4914 /* do_default is really a C-ism to deal with tentative definitions.
4915 But let's leave it here to ease the eventual merge. */
4916 int do_default
= !DECL_EXTERNAL (decl
);
4917 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4920 /* Check that there are no designated initializers in INIT, as
4921 those are not supported in GNU C++, and as the middle-end
4922 will crash if presented with a non-numeric designated
4924 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
4926 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4927 constructor_elt
*ce
;
4929 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4930 if (!check_array_designated_initializer (ce
, i
))
4936 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4940 error ("initializer fails to determine size of %qD", decl
);
4942 else if (failure
== 2)
4946 error ("array size missing in %qD", decl
);
4948 /* If a `static' var's size isn't known, make it extern as
4949 well as static, so it does not get allocated. If it's not
4950 `static', then don't mark it extern; finish_incomplete_decl
4951 will give it a default size and it will get allocated. */
4952 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4953 DECL_EXTERNAL (decl
) = 1;
4955 else if (failure
== 3)
4957 error ("zero-size array %qD", decl
);
4961 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4963 relayout_decl (decl
);
4967 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4968 any appropriate error messages regarding the layout. */
4971 layout_var_decl (tree decl
)
4975 type
= TREE_TYPE (decl
);
4976 if (type
== error_mark_node
)
4979 /* If we haven't already laid out this declaration, do so now.
4980 Note that we must not call complete type for an external object
4981 because it's type might involve templates that we are not
4982 supposed to instantiate yet. (And it's perfectly valid to say
4983 `extern X x' for some incomplete type `X'.) */
4984 if (!DECL_EXTERNAL (decl
))
4985 complete_type (type
);
4986 if (!DECL_SIZE (decl
)
4987 && TREE_TYPE (decl
) != error_mark_node
4988 && (COMPLETE_TYPE_P (type
)
4989 || (TREE_CODE (type
) == ARRAY_TYPE
4990 && !TYPE_DOMAIN (type
)
4991 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4992 layout_decl (decl
, 0);
4994 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4996 /* An automatic variable with an incomplete type: that is an error.
4997 Don't talk about array types here, since we took care of that
4998 message in grokdeclarator. */
4999 error ("storage size of %qD isn%'t known", decl
);
5000 TREE_TYPE (decl
) = error_mark_node
;
5003 /* Keep this code around in case we later want to control debug info
5004 based on whether a type is "used". (jason 1999-11-11) */
5006 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5007 /* Let debugger know it should output info for this type. */
5008 note_debug_info_needed (ttype
);
5010 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5011 note_debug_info_needed (DECL_CONTEXT (decl
));
5014 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5015 && DECL_SIZE (decl
) != NULL_TREE
5016 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5018 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5019 constant_expression_warning (DECL_SIZE (decl
));
5022 error ("storage size of %qD isn%'t constant", decl
);
5023 TREE_TYPE (decl
) = error_mark_node
;
5028 /* If a local static variable is declared in an inline function, or if
5029 we have a weak definition, we must endeavor to create only one
5030 instance of the variable at link-time. */
5033 maybe_commonize_var (tree decl
)
5035 /* Static data in a function with comdat linkage also has comdat
5037 if (TREE_STATIC (decl
)
5038 /* Don't mess with __FUNCTION__. */
5039 && ! DECL_ARTIFICIAL (decl
)
5040 && DECL_FUNCTION_SCOPE_P (decl
)
5041 && vague_linkage_p (DECL_CONTEXT (decl
)))
5045 /* With weak symbols, we simply make the variable COMDAT;
5046 that will cause copies in multiple translations units to
5048 comdat_linkage (decl
);
5052 if (DECL_INITIAL (decl
) == NULL_TREE
5053 || DECL_INITIAL (decl
) == error_mark_node
)
5055 /* Without weak symbols, we can use COMMON to merge
5056 uninitialized variables. */
5057 TREE_PUBLIC (decl
) = 1;
5058 DECL_COMMON (decl
) = 1;
5062 /* While for initialized variables, we must use internal
5063 linkage -- which means that multiple copies will not
5065 TREE_PUBLIC (decl
) = 0;
5066 DECL_COMMON (decl
) = 0;
5067 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5068 "sorry: semantics of inline function static "
5069 "data %q#D are wrong (you%'ll wind up "
5070 "with multiple copies)", decl
))
5071 inform (DECL_SOURCE_LOCATION (decl
),
5072 "you can work around this by removing the initializer");
5076 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
5077 /* Set it up again; we might have set DECL_INITIAL since the last
5079 comdat_linkage (decl
);
5082 /* Issue an error message if DECL is an uninitialized const variable. */
5085 check_for_uninitialized_const_var (tree decl
)
5087 tree type
= strip_array_types (TREE_TYPE (decl
));
5089 /* ``Unless explicitly declared extern, a const object does not have
5090 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5093 && TREE_CODE (type
) != REFERENCE_TYPE
5094 && CP_TYPE_CONST_P (type
)
5095 && !DECL_INITIAL (decl
))
5097 tree field
= default_init_uninitialized_part (type
);
5101 permerror (DECL_SOURCE_LOCATION (decl
),
5102 "uninitialized const %qD", decl
);
5104 if (CLASS_TYPE_P (type
))
5106 tree defaulted_ctor
;
5108 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5109 "%q#T has no user-provided default constructor", type
);
5110 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5112 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5113 "constructor is not user-provided because it is "
5114 "explicitly defaulted in the class body");
5115 inform (0, "and the implicitly-defined constructor does not "
5116 "initialize %q+#D", field
);
5121 /* Structure holding the current initializer being processed by reshape_init.
5122 CUR is a pointer to the current element being processed, END is a pointer
5123 after the last element present in the initializer. */
5124 typedef struct reshape_iterator_t
5126 constructor_elt
*cur
;
5127 constructor_elt
*end
;
5130 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5132 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5133 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5134 initialized. If there are no more such fields, the return value
5138 next_initializable_field (tree field
)
5141 && (TREE_CODE (field
) != FIELD_DECL
5142 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5143 || DECL_ARTIFICIAL (field
)))
5144 field
= DECL_CHAIN (field
);
5149 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5150 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5151 INTEGER_CST representing the size of the array minus one (the maximum index),
5152 or NULL_TREE if the array was declared without specifying the size. D is
5153 the iterator within the constructor. */
5156 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5157 tsubst_flags_t complain
)
5160 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5161 unsigned HOST_WIDE_INT max_index_cst
= 0;
5162 unsigned HOST_WIDE_INT index
;
5164 /* The initializer for an array is always a CONSTRUCTOR. */
5165 new_init
= build_constructor (init_list_type_node
, NULL
);
5169 /* Minus 1 is used for zero sized arrays. */
5170 if (integer_all_onesp (max_index
))
5173 if (tree_fits_uhwi_p (max_index
))
5174 max_index_cst
= tree_to_uhwi (max_index
);
5175 /* sizetype is sign extended, not zero extended. */
5177 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5180 /* Loop until there are no more initializers. */
5182 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5186 constructor_elt
*old_cur
= d
->cur
;
5188 check_array_designated_initializer (d
->cur
, index
);
5189 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5191 if (elt_init
== error_mark_node
)
5192 return error_mark_node
;
5193 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5194 size_int (index
), elt_init
);
5195 if (!TREE_CONSTANT (elt_init
))
5196 TREE_CONSTANT (new_init
) = false;
5198 /* This can happen with an invalid initializer (c++/54501). */
5199 if (d
->cur
== old_cur
&& !sized_array_p
)
5206 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5207 Parameters are the same of reshape_init_r. */
5210 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5212 tree max_index
= NULL_TREE
;
5214 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5216 if (TYPE_DOMAIN (type
))
5217 max_index
= array_type_nelts (type
);
5219 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5222 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5223 Parameters are the same of reshape_init_r. */
5226 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5228 tree max_index
= NULL_TREE
;
5230 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5232 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5234 tree value
= d
->cur
->value
;
5235 if (!same_type_p (TREE_TYPE (value
), type
))
5237 if (complain
& tf_error
)
5238 error ("invalid type %qT as initializer for a vector of type %qT",
5239 TREE_TYPE (d
->cur
->value
), type
);
5240 value
= error_mark_node
;
5246 /* For a vector, we initialize it as an array of the appropriate size. */
5247 if (TREE_CODE (type
) == VECTOR_TYPE
)
5248 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5250 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5253 /* Subroutine of reshape_init_r, processes the initializers for classes
5254 or union. Parameters are the same of reshape_init_r. */
5257 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5258 tsubst_flags_t complain
)
5263 gcc_assert (CLASS_TYPE_P (type
));
5265 /* The initializer for a class is always a CONSTRUCTOR. */
5266 new_init
= build_constructor (init_list_type_node
, NULL
);
5267 field
= next_initializable_field (TYPE_FIELDS (type
));
5273 An initializer for an aggregate member that is an
5274 empty class shall have the form of an empty
5275 initializer-list {}. */
5276 if (!first_initializer_p
)
5278 if (complain
& tf_error
)
5279 error ("initializer for %qT must be brace-enclosed", type
);
5280 return error_mark_node
;
5285 /* Loop through the initializable fields, gathering initializers. */
5286 while (d
->cur
!= d
->end
)
5289 constructor_elt
*old_cur
= d
->cur
;
5291 /* Handle designated initializers, as an extension. */
5294 if (d
->cur
->index
== error_mark_node
)
5295 return error_mark_node
;
5297 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5299 if (complain
& tf_error
)
5300 error ("%<[%E] =%> used in a GNU-style designated initializer"
5301 " for class %qT", d
->cur
->index
, type
);
5302 return error_mark_node
;
5305 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5306 /* We already reshaped this. */
5307 gcc_assert (d
->cur
->index
== field
);
5309 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5311 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5313 if (complain
& tf_error
)
5314 error ("%qT has no non-static data member named %qD", type
,
5316 return error_mark_node
;
5320 /* If we processed all the member of the class, we are done. */
5324 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5325 /*first_initializer_p=*/false, complain
);
5326 if (field_init
== error_mark_node
)
5327 return error_mark_node
;
5329 if (d
->cur
== old_cur
&& d
->cur
->index
)
5331 /* This can happen with an invalid initializer for a flexible
5332 array member (c++/54441). */
5333 if (complain
& tf_error
)
5334 error ("invalid initializer for %q#D", field
);
5335 return error_mark_node
;
5338 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5342 When a union is initialized with a brace-enclosed
5343 initializer, the braces shall only contain an
5344 initializer for the first member of the union. */
5345 if (TREE_CODE (type
) == UNION_TYPE
)
5348 field
= next_initializable_field (DECL_CHAIN (field
));
5354 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5355 designators are not valid; either complain or return true to indicate
5356 that reshape_init_r should return error_mark_node. */
5359 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5363 if (complain
& tf_error
)
5364 error ("C99 designator %qE outside aggregate initializer",
5372 /* Subroutine of reshape_init, which processes a single initializer (part of
5373 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5374 iterator within the CONSTRUCTOR which points to the initializer to process.
5375 FIRST_INITIALIZER_P is true if this is the first initializer of the
5376 outermost CONSTRUCTOR node. */
5379 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5380 tsubst_flags_t complain
)
5382 tree init
= d
->cur
->value
;
5384 if (error_operand_p (init
))
5385 return error_mark_node
;
5387 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5388 && has_designator_problem (d
, complain
))
5389 return error_mark_node
;
5391 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5393 /* A complex type can be initialized from one or two initializers,
5394 but braces are not elided. */
5396 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5398 if (CONSTRUCTOR_NELTS (init
) > 2)
5400 if (complain
& tf_error
)
5401 error ("too many initializers for %qT", type
);
5403 return error_mark_node
;
5406 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5408 vec
<constructor_elt
, va_gc
> *v
= 0;
5409 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5410 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5411 if (has_designator_problem (d
, complain
))
5412 return error_mark_node
;
5414 init
= build_constructor (init_list_type_node
, v
);
5419 /* A non-aggregate type is always initialized with a single
5421 if (!CP_AGGREGATE_TYPE_P (type
))
5423 /* It is invalid to initialize a non-aggregate type with a
5424 brace-enclosed initializer before C++0x.
5425 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5426 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5427 a CONSTRUCTOR (with a record type). */
5428 if (TREE_CODE (init
) == CONSTRUCTOR
5429 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5431 if (SCALAR_TYPE_P (type
))
5433 if (complain
& tf_error
)
5434 error ("braces around scalar initializer for type %qT", type
);
5435 init
= error_mark_node
;
5438 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5445 /* "If T is a class type and the initializer list has a single element of
5446 type cv U, where U is T or a class derived from T, the object is
5447 initialized from that element." Even if T is an aggregate. */
5448 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5449 && first_initializer_p
5450 && d
->end
- d
->cur
== 1
5451 && reference_related_p (type
, TREE_TYPE (init
)))
5459 All implicit type conversions (clause _conv_) are considered when
5460 initializing the aggregate member with an initializer from an
5461 initializer-list. If the initializer can initialize a member,
5462 the member is initialized. Otherwise, if the member is itself a
5463 non-empty subaggregate, brace elision is assumed and the
5464 initializer is considered for the initialization of the first
5465 member of the subaggregate. */
5466 if (TREE_CODE (init
) != CONSTRUCTOR
5467 /* But don't try this for the first initializer, since that would be
5468 looking through the outermost braces; A a2 = { a1 }; is not a
5469 valid aggregate initialization. */
5470 && !first_initializer_p
5471 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5472 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5479 /* [dcl.init.string]
5481 A char array (whether plain char, signed char, or unsigned char)
5482 can be initialized by a string-literal (optionally enclosed in
5483 braces); a wchar_t array can be initialized by a wide
5484 string-literal (optionally enclosed in braces). */
5485 if (TREE_CODE (type
) == ARRAY_TYPE
5486 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5488 tree str_init
= init
;
5490 /* Strip one level of braces if and only if they enclose a single
5491 element (as allowed by [dcl.init.string]). */
5492 if (!first_initializer_p
5493 && TREE_CODE (str_init
) == CONSTRUCTOR
5494 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5496 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5499 /* If it's a string literal, then it's the initializer for the array
5500 as a whole. Otherwise, continue with normal initialization for
5501 array types (one value per array element). */
5502 if (TREE_CODE (str_init
) == STRING_CST
)
5504 if (has_designator_problem (d
, complain
))
5505 return error_mark_node
;
5511 /* The following cases are about aggregates. If we are not within a full
5512 initializer already, and there is not a CONSTRUCTOR, it means that there
5513 is a missing set of braces (that is, we are processing the case for
5514 which reshape_init exists). */
5515 if (!first_initializer_p
)
5517 if (TREE_CODE (init
) == CONSTRUCTOR
)
5519 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5520 /* There is no need to reshape pointer-to-member function
5521 initializers, as they are always constructed correctly
5522 by the front end. */
5524 else if (COMPOUND_LITERAL_P (init
))
5525 /* For a nested compound literal, there is no need to reshape since
5526 brace elision is not allowed. Even if we decided to allow it,
5527 we should add a call to reshape_init in finish_compound_literal,
5528 before calling digest_init, so changing this code would still
5529 not be necessary. */
5530 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5534 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5535 return reshape_init (type
, init
, complain
);
5539 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5543 /* Dispatch to specialized routines. */
5544 if (CLASS_TYPE_P (type
))
5545 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5546 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5547 return reshape_init_array (type
, d
, complain
);
5548 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5549 return reshape_init_vector (type
, d
, complain
);
5554 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5555 brace-enclosed aggregate initializer.
5557 INIT is the CONSTRUCTOR containing the list of initializers describing
5558 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5559 It may not presently match the shape of the TYPE; for example:
5561 struct S { int a; int b; };
5562 struct S a[] = { 1, 2, 3, 4 };
5564 Here INIT will hold a vector of four elements, rather than a
5565 vector of two elements, each itself a vector of two elements. This
5566 routine transforms INIT from the former form into the latter. The
5567 revised CONSTRUCTOR node is returned. */
5570 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5572 vec
<constructor_elt
, va_gc
> *v
;
5576 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5578 v
= CONSTRUCTOR_ELTS (init
);
5580 /* An empty constructor does not need reshaping, and it is always a valid
5582 if (vec_safe_is_empty (v
))
5585 /* Recurse on this CONSTRUCTOR. */
5587 d
.end
= d
.cur
+ v
->length ();
5589 new_init
= reshape_init_r (type
, &d
, true, complain
);
5590 if (new_init
== error_mark_node
)
5591 return error_mark_node
;
5593 /* Make sure all the element of the constructor were used. Otherwise,
5594 issue an error about exceeding initializers. */
5597 if (complain
& tf_error
)
5598 error ("too many initializers for %qT", type
);
5600 return error_mark_node
;
5606 /* Verify array initializer. Returns true if errors have been reported. */
5609 check_array_initializer (tree decl
, tree type
, tree init
)
5611 tree element_type
= TREE_TYPE (type
);
5613 /* The array type itself need not be complete, because the
5614 initializer may tell us how many elements are in the array.
5615 But, the elements of the array must be complete. */
5616 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5619 error ("elements of array %q#D have incomplete type", decl
);
5621 error ("elements of array %q#T have incomplete type", type
);
5624 /* A compound literal can't have variable size. */
5626 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5627 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5629 error ("variable-sized compound literal");
5635 /* Subroutine of check_initializer; args are passed down from that function.
5636 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5639 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5642 gcc_assert (stmts_are_full_exprs_p ());
5643 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5646 /* Verify INIT (the initializer for DECL), and record the
5647 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5648 grok_reference_init.
5650 If the return value is non-NULL, it is an expression that must be
5651 evaluated dynamically to initialize DECL. */
5654 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5656 tree type
= TREE_TYPE (decl
);
5657 tree init_code
= NULL
;
5660 /* Things that are going to be initialized need to have complete
5662 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5664 if (DECL_HAS_VALUE_EXPR_P (decl
))
5666 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5667 it doesn't have storage to be initialized. */
5668 gcc_assert (init
== NULL_TREE
);
5672 if (type
== error_mark_node
)
5673 /* We will have already complained. */
5676 if (TREE_CODE (type
) == ARRAY_TYPE
)
5678 if (check_array_initializer (decl
, type
, init
))
5681 else if (!COMPLETE_TYPE_P (type
))
5683 error ("%q#D has incomplete type", decl
);
5684 TREE_TYPE (decl
) = error_mark_node
;
5688 /* There is no way to make a variable-sized class type in GNU C++. */
5689 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5691 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5693 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5694 if (SCALAR_TYPE_P (type
))
5698 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5699 init
= build_zero_init (type
, NULL_TREE
, false);
5701 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5703 error ("scalar object %qD requires one element in initializer",
5705 TREE_TYPE (decl
) = error_mark_node
;
5711 if (TREE_CODE (decl
) == CONST_DECL
)
5713 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5715 DECL_INITIAL (decl
) = init
;
5717 gcc_assert (init
!= NULL_TREE
);
5720 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5722 else if (init
|| type_build_ctor_call (type
)
5723 || TREE_CODE (type
) == REFERENCE_TYPE
)
5725 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5727 init
= grok_reference_init (decl
, type
, init
, flags
);
5728 flags
|= LOOKUP_ALREADY_DIGESTED
;
5731 check_for_uninitialized_const_var (decl
);
5732 /* Do not reshape constructors of vectors (they don't need to be
5734 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5736 if (is_std_init_list (type
))
5738 init
= perform_implicit_conversion (type
, init
,
5739 tf_warning_or_error
);
5740 flags
|= LOOKUP_ALREADY_DIGESTED
;
5742 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5744 /* Don't reshape if the class has constructors. */
5745 if (cxx_dialect
== cxx98
)
5746 error ("in C++98 %qD must be initialized by constructor, "
5750 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5752 error ("opaque vector types cannot be initialized");
5753 init
= error_mark_node
;
5757 init
= reshape_init (type
, init
, tf_warning_or_error
);
5758 if (SCALAR_TYPE_P (type
))
5759 check_narrowing (type
, init
);
5763 /* If DECL has an array type without a specific bound, deduce the
5764 array size from the initializer. */
5765 maybe_deduce_size_from_array_init (decl
, init
);
5766 type
= TREE_TYPE (decl
);
5767 if (type
== error_mark_node
)
5770 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5771 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5772 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5773 && CP_AGGREGATE_TYPE_P (type
)
5774 && (CLASS_TYPE_P (type
)
5775 || !TYPE_NEEDS_CONSTRUCTING (type
)
5776 || type_has_extended_temps (type
))))
5778 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5780 /* A constructor call is a non-trivial initializer even if
5781 it isn't explicitly written. */
5782 if (TREE_SIDE_EFFECTS (init_code
))
5783 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5785 /* If this is a constexpr initializer, expand_default_init will
5786 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5787 case, pull the initializer back out and pass it down into
5788 store_init_value. */
5789 while (TREE_CODE (init_code
) == EXPR_STMT
5790 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5791 init_code
= TREE_OPERAND (init_code
, 0);
5792 if (TREE_CODE (init_code
) == INIT_EXPR
)
5794 init
= TREE_OPERAND (init_code
, 1);
5795 init_code
= NULL_TREE
;
5796 /* Don't call digest_init; it's unnecessary and will complain
5797 about aggregate initialization of non-aggregate classes. */
5798 flags
|= LOOKUP_ALREADY_DIGESTED
;
5800 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5802 /* Declared constexpr, but no suitable initializer; massage
5803 init appropriately so we can pass it into store_init_value
5805 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5806 init
= finish_compound_literal (type
, init
,
5807 tf_warning_or_error
);
5808 else if (CLASS_TYPE_P (type
)
5809 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5811 init
= build_functional_cast (type
, init
, tf_none
);
5812 if (TREE_CODE (init
) == TARGET_EXPR
)
5813 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5815 init_code
= NULL_TREE
;
5821 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5823 /* In aggregate initialization of a variable, each element
5824 initialization is a full-expression because there is no
5825 enclosing expression. */
5826 gcc_assert (stmts_are_full_exprs_p ());
5828 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5830 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5831 && DECL_INITIAL (decl
)
5832 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5833 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5834 warning (0, "array %qD initialized by parenthesized string literal %qE",
5835 decl
, DECL_INITIAL (decl
));
5841 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5842 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5843 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5844 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5847 check_for_uninitialized_const_var (decl
);
5850 if (init
&& init
!= error_mark_node
)
5851 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5853 if (init_code
&& DECL_IN_AGGR_P (decl
))
5855 static int explained
= 0;
5857 if (cxx_dialect
< cxx11
)
5858 error ("initializer invalid for static member with constructor");
5860 error ("non-constant in-class initialization invalid for static "
5861 "member %qD", decl
);
5864 inform (input_location
,
5865 "(an out of class initialization is required)");
5874 /* If DECL is not a local variable, give it RTL. */
5877 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5879 int toplev
= toplevel_bindings_p ();
5881 const char *filename
;
5883 /* Set the DECL_ASSEMBLER_NAME for the object. */
5886 /* The `register' keyword, when used together with an
5887 asm-specification, indicates that the variable should be
5888 placed in a particular register. */
5889 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5891 set_user_assembler_name (decl
, asmspec
);
5892 DECL_HARD_REGISTER (decl
) = 1;
5896 if (TREE_CODE (decl
) == FUNCTION_DECL
5897 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5898 set_builtin_user_assembler_name (decl
, asmspec
);
5899 set_user_assembler_name (decl
, asmspec
);
5903 /* Handle non-variables up front. */
5906 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5910 /* If we see a class member here, it should be a static data
5912 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5914 gcc_assert (TREE_STATIC (decl
));
5915 /* An in-class declaration of a static data member should be
5916 external; it is only a declaration, and not a definition. */
5917 if (init
== NULL_TREE
)
5918 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5921 /* We don't create any RTL for local variables. */
5922 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5925 /* We defer emission of local statics until the corresponding
5926 DECL_EXPR is expanded. */
5927 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5929 /* We try to defer namespace-scope static constants so that they are
5930 not emitted into the object file unnecessarily. */
5931 filename
= LOCATION_FILE (input_location
);
5932 if (!DECL_VIRTUAL_P (decl
)
5933 && TREE_READONLY (decl
)
5934 && DECL_INITIAL (decl
) != NULL_TREE
5935 && DECL_INITIAL (decl
) != error_mark_node
5937 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5939 && !TREE_PUBLIC (decl
))
5941 /* Fool with the linkage of static consts according to #pragma
5943 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5944 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5946 TREE_PUBLIC (decl
) = 1;
5947 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5952 /* Likewise for template instantiations. */
5953 else if (DECL_LANG_SPECIFIC (decl
)
5954 && DECL_IMPLICIT_INSTANTIATION (decl
))
5957 /* If we're not deferring, go ahead and assemble the variable. */
5959 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5962 /* walk_tree helper for wrap_temporary_cleanups, below. */
5965 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5967 /* Stop at types or full-expression boundaries. */
5968 if (TYPE_P (*stmt_p
)
5969 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5975 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5977 tree guard
= (tree
)data
;
5978 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5980 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5981 /* Tell honor_protect_cleanup_actions to handle this as a separate
5983 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5985 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5991 /* We're initializing a local variable which has a cleanup GUARD. If there
5992 are any temporaries used in the initializer INIT of this variable, we
5993 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5994 variable will be cleaned up properly if one of them throws.
5996 Unfortunately, there's no way to express this properly in terms of
5997 nesting, as the regions for the temporaries overlap the region for the
5998 variable itself; if there are two temporaries, the variable needs to be
5999 the first thing destroyed if either of them throws. However, we only
6000 want to run the variable's cleanup if it actually got constructed. So
6001 we need to guard the temporary cleanups with the variable's cleanup if
6002 they are run on the normal path, but not if they are run on the
6003 exceptional path. We implement this by telling
6004 honor_protect_cleanup_actions to strip the variable cleanup from the
6005 exceptional path. */
6008 wrap_temporary_cleanups (tree init
, tree guard
)
6010 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6013 /* Generate code to initialize DECL (a local variable). */
6016 initialize_local_var (tree decl
, tree init
)
6018 tree type
= TREE_TYPE (decl
);
6022 gcc_assert (VAR_P (decl
)
6023 || TREE_CODE (decl
) == RESULT_DECL
);
6024 gcc_assert (!TREE_STATIC (decl
));
6026 if (DECL_SIZE (decl
) == NULL_TREE
)
6028 /* If we used it already as memory, it must stay in memory. */
6029 DECL_INITIAL (decl
) = NULL_TREE
;
6030 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6034 if (type
== error_mark_node
)
6037 /* Compute and store the initial value. */
6038 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6039 if (TREE_USED (type
))
6040 DECL_READ_P (decl
) = 1;
6042 /* Generate a cleanup, if necessary. */
6043 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6045 /* Perform the initialization. */
6048 if (TREE_CODE (init
) == INIT_EXPR
6049 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
6051 /* Stick simple initializers in DECL_INITIAL so that
6052 -Wno-init-self works (c++/34772). */
6053 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6054 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
6058 int saved_stmts_are_full_exprs_p
;
6060 /* If we're only initializing a single object, guard the
6061 destructors of any temporaries used in its initializer with
6062 its destructor. This isn't right for arrays because each
6063 element initialization is a full-expression. */
6064 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6065 wrap_temporary_cleanups (init
, cleanup
);
6067 gcc_assert (building_stmt_list_p ());
6068 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6069 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6070 finish_expr_stmt (init
);
6071 current_stmt_tree ()->stmts_are_full_exprs_p
=
6072 saved_stmts_are_full_exprs_p
;
6076 /* Set this to 0 so we can tell whether an aggregate which was
6077 initialized was ever used. Don't do this if it has a
6078 destructor, so we don't complain about the 'resource
6079 allocation is initialization' idiom. Now set
6080 attribute((unused)) on types so decls of that type will be
6081 marked used. (see TREE_USED, above.) */
6082 if (TYPE_NEEDS_CONSTRUCTING (type
)
6084 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6085 && DECL_NAME (decl
))
6086 TREE_USED (decl
) = 0;
6087 else if (already_used
)
6088 TREE_USED (decl
) = 1;
6091 finish_decl_cleanup (decl
, cleanup
);
6094 /* DECL is a VAR_DECL for a compiler-generated variable with static
6095 storage duration (like a virtual table) whose initializer is a
6096 compile-time constant. Initialize the variable and provide it to the
6100 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6103 gcc_assert (DECL_ARTIFICIAL (decl
));
6104 init
= build_constructor (TREE_TYPE (decl
), v
);
6105 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6106 DECL_INITIAL (decl
) = init
;
6107 DECL_INITIALIZED_P (decl
) = 1;
6108 determine_visibility (decl
);
6109 layout_var_decl (decl
);
6110 maybe_commonize_var (decl
);
6111 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6114 /* INIT is the initializer for a variable, as represented by the
6115 parser. Returns true iff INIT is type-dependent. */
6118 type_dependent_init_p (tree init
)
6120 if (TREE_CODE (init
) == TREE_LIST
)
6121 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6122 return any_type_dependent_elements_p (init
);
6123 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6124 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6126 vec
<constructor_elt
, va_gc
> *elts
;
6130 elts
= CONSTRUCTOR_ELTS (init
);
6131 nelts
= vec_safe_length (elts
);
6132 for (i
= 0; i
< nelts
; ++i
)
6133 if (type_dependent_init_p ((*elts
)[i
].value
))
6137 /* It must be a simple expression, e.g., int i = 3; */
6138 return type_dependent_expression_p (init
);
6143 /* INIT is the initializer for a variable, as represented by the
6144 parser. Returns true iff INIT is value-dependent. */
6147 value_dependent_init_p (tree init
)
6149 if (TREE_CODE (init
) == TREE_LIST
)
6150 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6151 return any_value_dependent_elements_p (init
);
6152 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6153 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6155 vec
<constructor_elt
, va_gc
> *elts
;
6159 elts
= CONSTRUCTOR_ELTS (init
);
6160 nelts
= vec_safe_length (elts
);
6161 for (i
= 0; i
< nelts
; ++i
)
6162 if (value_dependent_init_p ((*elts
)[i
].value
))
6166 /* It must be a simple expression, e.g., int i = 3; */
6167 return value_dependent_expression_p (init
);
6172 /* Finish processing of a declaration;
6173 install its line number and initial value.
6174 If the length of an array type is not known before,
6175 it must be determined now, from the initial value, or it is an error.
6177 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6178 true, then INIT is an integral constant expression.
6180 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6181 if the (init) syntax was used. */
6184 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6185 tree asmspec_tree
, int flags
)
6188 vec
<tree
, va_gc
> *cleanups
= NULL
;
6189 const char *asmspec
= NULL
;
6190 int was_readonly
= 0;
6191 bool var_definition_p
= false;
6194 if (decl
== error_mark_node
)
6199 error ("assignment (not initialization) in declaration");
6203 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6204 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6205 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6207 type
= TREE_TYPE (decl
);
6208 if (type
== error_mark_node
)
6211 /* If a name was specified, get the string. */
6212 if (at_namespace_scope_p ())
6213 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6214 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6215 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6217 if (current_class_type
6218 && CP_DECL_CONTEXT (decl
) == current_class_type
6219 && TYPE_BEING_DEFINED (current_class_type
)
6220 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6221 && (DECL_INITIAL (decl
) || init
))
6222 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6224 if (TREE_CODE (decl
) != FUNCTION_DECL
6225 && (auto_node
= type_uses_auto (type
)))
6228 if (init
== NULL_TREE
)
6230 if (DECL_LANG_SPECIFIC (decl
)
6231 && DECL_TEMPLATE_INSTANTIATION (decl
)
6232 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6234 /* init is null because we're deferring instantiating the
6235 initializer until we need it. Well, we need it now. */
6236 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6240 error ("declaration of %q#D has no initializer", decl
);
6241 TREE_TYPE (decl
) = error_mark_node
;
6245 if (TREE_CODE (d_init
) == TREE_LIST
)
6246 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6247 tf_warning_or_error
);
6248 d_init
= resolve_nondeduced_context (d_init
);
6249 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6251 if (type
== error_mark_node
)
6253 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6256 if (!ensure_literal_type_for_constexpr_object (decl
))
6257 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6260 && DECL_CLASS_SCOPE_P (decl
)
6261 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6262 check_static_variable_definition (decl
, type
);
6264 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6267 if (init
== ridpointers
[(int)RID_DELETE
])
6269 /* FIXME check this is 1st decl. */
6270 DECL_DELETED_FN (decl
) = 1;
6271 DECL_DECLARED_INLINE_P (decl
) = 1;
6272 DECL_INITIAL (decl
) = error_mark_node
;
6273 FOR_EACH_CLONE (clone
, decl
)
6275 DECL_DELETED_FN (clone
) = 1;
6276 DECL_DECLARED_INLINE_P (clone
) = 1;
6277 DECL_INITIAL (clone
) = error_mark_node
;
6281 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6283 if (defaultable_fn_check (decl
))
6284 DECL_DEFAULTED_FN (decl
) = 1;
6286 DECL_INITIAL (decl
) = NULL_TREE
;
6290 if (init
&& VAR_P (decl
))
6292 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6293 /* If DECL is a reference, then we want to know whether init is a
6294 reference constant; init_const_expr_p as passed tells us whether
6295 it's an rvalue constant. */
6296 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6297 init_const_expr_p
= potential_constant_expression (init
);
6298 if (init_const_expr_p
)
6300 /* Set these flags now for templates. We'll update the flags in
6301 store_init_value for instantiations. */
6302 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6303 if (decl_maybe_constant_var_p (decl
))
6304 TREE_CONSTANT (decl
) = 1;
6308 if (processing_template_decl
)
6310 bool type_dependent_p
;
6312 /* Add this declaration to the statement-tree. */
6313 if (at_function_scope_p ())
6314 add_decl_expr (decl
);
6316 type_dependent_p
= dependent_type_p (type
);
6318 if (check_for_bare_parameter_packs (init
))
6321 DECL_INITIAL (decl
) = NULL_TREE
;
6324 /* Generally, initializers in templates are expanded when the
6325 template is instantiated. But, if DECL is a variable constant
6326 then it can be used in future constant expressions, so its value
6327 must be available. */
6329 if (!VAR_P (decl
) || dependent_type_p (type
))
6330 /* We can't do anything if the decl has dependent type. */;
6332 && init_const_expr_p
6333 && !type_dependent_p
6334 && decl_maybe_constant_var_p (decl
)
6335 && !type_dependent_init_p (init
)
6336 && !value_dependent_init_p (init
))
6338 /* This variable seems to be a non-dependent constant, so process
6339 its initializer. If check_initializer returns non-null the
6340 initialization wasn't constant after all. */
6342 cleanups
= make_tree_vector ();
6343 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6344 if (init_code
== NULL_TREE
)
6346 release_tree_vector (cleanups
);
6348 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6350 /* Deduce array size even if the initializer is dependent. */
6351 maybe_deduce_size_from_array_init (decl
, init
);
6352 /* And complain about multiple initializers. */
6353 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6354 && !MAYBE_CLASS_TYPE_P (type
))
6355 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6356 tf_warning_or_error
);
6360 DECL_INITIAL (decl
) = init
;
6364 /* Just store non-static data member initializers for later. */
6365 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6366 DECL_INITIAL (decl
) = init
;
6368 /* Take care of TYPE_DECLs up front. */
6369 if (TREE_CODE (decl
) == TYPE_DECL
)
6371 if (type
!= error_mark_node
6372 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6374 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6375 warning (0, "shadowing previous type declaration of %q#D", decl
);
6376 set_identifier_type_value (DECL_NAME (decl
), decl
);
6379 /* If we have installed this as the canonical typedef for this
6380 type, and that type has not been defined yet, delay emitting
6381 the debug information for it, as we will emit it later. */
6382 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6383 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6384 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6386 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6391 /* A reference will be modified here, as it is initialized. */
6392 if (! DECL_EXTERNAL (decl
)
6393 && TREE_READONLY (decl
)
6394 && TREE_CODE (type
) == REFERENCE_TYPE
)
6397 TREE_READONLY (decl
) = 0;
6402 /* If this is a local variable that will need a mangled name,
6403 register it now. We must do this before processing the
6404 initializer for the variable, since the initialization might
6405 require a guard variable, and since the mangled name of the
6406 guard variable will depend on the mangled name of this
6408 if (DECL_FUNCTION_SCOPE_P (decl
)
6409 && TREE_STATIC (decl
)
6410 && !DECL_ARTIFICIAL (decl
))
6412 push_local_name (decl
);
6413 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6414 || DECL_DESTRUCTOR_P (current_function_decl
))
6415 /* Normally local_decls is populated during GIMPLE lowering,
6416 but [cd]tors are never actually compiled directly. We need
6417 to put statics on the list so we can deal with the label
6418 address extension. FIXME. */
6419 add_local_decl (cfun
, decl
);
6422 /* Convert the initializer to the type of DECL, if we have not
6423 already initialized DECL. */
6424 if (!DECL_INITIALIZED_P (decl
)
6425 /* If !DECL_EXTERNAL then DECL is being defined. In the
6426 case of a static data member initialized inside the
6427 class-specifier, there can be an initializer even if DECL
6428 is *not* defined. */
6429 && (!DECL_EXTERNAL (decl
) || init
))
6431 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6434 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6435 /* Allow libjava/prims.cc define primitive classes. */
6436 if (init
!= NULL_TREE
6437 || jclass
== NULL_TREE
6438 || TREE_CODE (jclass
) != TYPE_DECL
6439 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6440 || !same_type_ignoring_top_level_qualifiers_p
6441 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6442 error ("Java object %qD not allocated with %<new%>", decl
);
6445 cleanups
= make_tree_vector ();
6446 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6452 The memory occupied by any object of static storage
6453 duration is zero-initialized at program startup before
6454 any other initialization takes place.
6456 We cannot create an appropriate initializer until after
6457 the type of DECL is finalized. If DECL_INITIAL is set,
6458 then the DECL is statically initialized, and any
6459 necessary zero-initialization has already been performed. */
6460 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6461 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6462 /*nelts=*/NULL_TREE
,
6463 /*static_storage_p=*/true);
6464 /* Remember that the initialization for this variable has
6466 DECL_INITIALIZED_P (decl
) = 1;
6467 /* This declaration is the definition of this variable,
6468 unless we are initializing a static data member within
6469 the class specifier. */
6470 if (!DECL_EXTERNAL (decl
))
6471 var_definition_p
= true;
6473 /* If the variable has an array type, lay out the type, even if
6474 there is no initializer. It is valid to index through the
6475 array, and we must get TYPE_ALIGN set correctly on the array
6477 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6480 if (TREE_STATIC (decl
)
6481 && !at_function_scope_p ()
6482 && current_function_decl
== NULL
)
6483 /* So decl is a global variable or a static member of a
6484 non local class. Record the types it uses
6485 so that we can decide later to emit debug info for them. */
6486 record_types_used_by_current_var_decl (decl
);
6488 else if (TREE_CODE (decl
) == FIELD_DECL
6489 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6490 error ("non-static data member %qD has Java class type", decl
);
6492 /* Add this declaration to the statement-tree. This needs to happen
6493 after the call to check_initializer so that the DECL_EXPR for a
6494 reference temp is added before the DECL_EXPR for the reference itself. */
6495 if (DECL_FUNCTION_SCOPE_P (decl
))
6497 /* If we're building a variable sized type, and we might be
6498 reachable other than via the top of the current binding
6499 level, then create a new BIND_EXPR so that we deallocate
6500 the object at the right time. */
6503 && !TREE_CONSTANT (DECL_SIZE (decl
))
6504 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6507 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6508 TREE_SIDE_EFFECTS (bind
) = 1;
6510 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6512 add_decl_expr (decl
);
6515 /* Let the middle end know about variables and functions -- but not
6516 static data members in uninstantiated class templates. */
6517 if (VAR_OR_FUNCTION_DECL_P (decl
))
6521 layout_var_decl (decl
);
6522 maybe_commonize_var (decl
);
6525 /* This needs to happen after the linkage is set. */
6526 determine_visibility (decl
);
6528 if (var_definition_p
&& TREE_STATIC (decl
))
6530 /* If a TREE_READONLY variable needs initialization
6531 at runtime, it is no longer readonly and we need to
6532 avoid MEM_READONLY_P being set on RTL created for it. */
6535 if (TREE_READONLY (decl
))
6536 TREE_READONLY (decl
) = 0;
6539 else if (was_readonly
)
6540 TREE_READONLY (decl
) = 1;
6542 /* Likewise if it needs destruction. */
6543 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6544 TREE_READONLY (decl
) = 0;
6547 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6549 /* Check for abstractness of the type. Notice that there is no
6550 need to strip array types here since the check for those types
6551 is already done within create_array_type_for_decl. */
6552 abstract_virtuals_error (decl
, type
);
6554 if (TREE_TYPE (decl
) == error_mark_node
)
6555 /* No initialization required. */
6557 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6561 if (init
== ridpointers
[(int)RID_DEFAULT
])
6563 /* An out-of-class default definition is defined at
6564 the point where it is explicitly defaulted. */
6565 if (DECL_DELETED_FN (decl
))
6566 maybe_explain_implicit_delete (decl
);
6567 else if (DECL_INITIAL (decl
) == error_mark_node
)
6568 synthesize_method (decl
);
6571 error ("function %q#D is initialized like a variable", decl
);
6573 /* else no initialization required. */
6575 else if (DECL_EXTERNAL (decl
)
6576 && ! (DECL_LANG_SPECIFIC (decl
)
6577 && DECL_NOT_REALLY_EXTERN (decl
)))
6580 DECL_INITIAL (decl
) = init
;
6582 /* A variable definition. */
6583 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6584 /* Initialize the local variable. */
6585 initialize_local_var (decl
, init
);
6587 /* If a variable is defined, and then a subsequent
6588 definition with external linkage is encountered, we will
6589 get here twice for the same variable. We want to avoid
6590 calling expand_static_init more than once. For variables
6591 that are not static data members, we can call
6592 expand_static_init only when we actually process the
6593 initializer. It is not legal to redeclare a static data
6594 member, so this issue does not arise in that case. */
6595 else if (var_definition_p
&& TREE_STATIC (decl
))
6596 expand_static_init (decl
, init
);
6599 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6600 reference, insert it in the statement-tree now. */
6604 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6605 push_cleanup (decl
, t
, false);
6606 release_tree_vector (cleanups
);
6610 TREE_READONLY (decl
) = 1;
6612 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6615 /* Returns a declaration for a VAR_DECL as if:
6617 extern "C" TYPE NAME;
6619 had been seen. Used to create compiler-generated global
6623 declare_global_var (tree name
, tree type
)
6627 push_to_top_level ();
6628 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6629 TREE_PUBLIC (decl
) = 1;
6630 DECL_EXTERNAL (decl
) = 1;
6631 DECL_ARTIFICIAL (decl
) = 1;
6632 /* If the user has explicitly declared this variable (perhaps
6633 because the code we are compiling is part of a low-level runtime
6634 library), then it is possible that our declaration will be merged
6635 with theirs by pushdecl. */
6636 decl
= pushdecl (decl
);
6637 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6638 pop_from_top_level ();
6643 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6644 if "__cxa_atexit" is not being used) corresponding to the function
6645 to be called when the program exits. */
6648 get_atexit_fn_ptr_type (void)
6652 if (!atexit_fn_ptr_type_node
)
6655 if (flag_use_cxa_atexit
6656 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6657 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6658 arg_type
= ptr_type_node
;
6660 /* The parameter to "atexit" is "void (*)(void)". */
6661 arg_type
= NULL_TREE
;
6663 fn_type
= build_function_type_list (void_type_node
,
6664 arg_type
, NULL_TREE
);
6665 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6668 return atexit_fn_ptr_type_node
;
6671 /* Returns a pointer to the `atexit' function. Note that if
6672 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6673 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6676 get_atexit_node (void)
6682 bool use_aeabi_atexit
;
6687 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6689 /* The declaration for `__cxa_atexit' is:
6691 int __cxa_atexit (void (*)(void *), void *, void *)
6693 We build up the argument types and then the function type
6695 tree argtype0
, argtype1
, argtype2
;
6697 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6698 /* First, build the pointer-to-function type for the first
6700 fn_ptr_type
= get_atexit_fn_ptr_type ();
6701 /* Then, build the rest of the argument types. */
6702 argtype2
= ptr_type_node
;
6703 if (use_aeabi_atexit
)
6705 argtype1
= fn_ptr_type
;
6706 argtype0
= ptr_type_node
;
6710 argtype1
= ptr_type_node
;
6711 argtype0
= fn_ptr_type
;
6713 /* And the final __cxa_atexit type. */
6714 fn_type
= build_function_type_list (integer_type_node
,
6715 argtype0
, argtype1
, argtype2
,
6717 if (use_aeabi_atexit
)
6718 name
= "__aeabi_atexit";
6720 name
= "__cxa_atexit";
6724 /* The declaration for `atexit' is:
6726 int atexit (void (*)());
6728 We build up the argument types and then the function type
6730 fn_ptr_type
= get_atexit_fn_ptr_type ();
6731 /* Build the final atexit type. */
6732 fn_type
= build_function_type_list (integer_type_node
,
6733 fn_ptr_type
, NULL_TREE
);
6737 /* Now, build the function declaration. */
6738 push_lang_context (lang_name_c
);
6739 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6740 mark_used (atexit_fndecl
);
6741 pop_lang_context ();
6742 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6747 /* Like get_atexit_node, but for thread-local cleanups. */
6750 get_thread_atexit_node (void)
6752 /* The declaration for `__cxa_thread_atexit' is:
6754 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6755 tree fn_type
= build_function_type_list (integer_type_node
,
6756 get_atexit_fn_ptr_type (),
6757 ptr_type_node
, ptr_type_node
,
6760 /* Now, build the function declaration. */
6761 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6762 ECF_LEAF
| ECF_NOTHROW
);
6763 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6766 /* Returns the __dso_handle VAR_DECL. */
6769 get_dso_handle_node (void)
6771 if (dso_handle_node
)
6772 return dso_handle_node
;
6774 /* Declare the variable. */
6775 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6778 #ifdef HAVE_GAS_HIDDEN
6779 if (dso_handle_node
!= error_mark_node
)
6781 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6782 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6786 return dso_handle_node
;
6789 /* Begin a new function with internal linkage whose job will be simply
6790 to destroy some particular variable. */
6792 static GTY(()) int start_cleanup_cnt
;
6795 start_cleanup_fn (void)
6800 bool use_cxa_atexit
= flag_use_cxa_atexit
6801 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6803 push_to_top_level ();
6805 /* No need to mangle this. */
6806 push_lang_context (lang_name_c
);
6808 /* Build the name of the function. */
6809 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6810 /* Build the function declaration. */
6811 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6812 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6813 /* It's a function with internal linkage, generated by the
6815 TREE_PUBLIC (fndecl
) = 0;
6816 DECL_ARTIFICIAL (fndecl
) = 1;
6817 /* Make the function `inline' so that it is only emitted if it is
6818 actually needed. It is unlikely that it will be inlined, since
6819 it is only called via a function pointer, but we avoid unnecessary
6820 emissions this way. */
6821 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6822 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6823 /* Build the parameter. */
6828 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6829 DECL_CONTEXT (parmdecl
) = fndecl
;
6830 TREE_USED (parmdecl
) = 1;
6831 DECL_READ_P (parmdecl
) = 1;
6832 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6836 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6838 pop_lang_context ();
6840 return current_function_decl
;
6843 /* Finish the cleanup function begun by start_cleanup_fn. */
6846 end_cleanup_fn (void)
6848 expand_or_defer_fn (finish_function (0));
6850 pop_from_top_level ();
6853 /* Generate code to handle the destruction of DECL, an object with
6854 static storage duration. */
6857 register_dtor_fn (tree decl
)
6864 bool ob_parm
, dso_parm
, use_dtor
;
6865 tree arg0
, arg1
, arg2
;
6868 type
= TREE_TYPE (decl
);
6869 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6872 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6873 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6874 destructor to "__cxa_atexit"; we don't have to build a temporary
6875 function to do the cleanup. */
6876 dso_parm
= (flag_use_cxa_atexit
6877 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6878 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6879 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6884 /* Find the destructor. */
6885 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6886 gcc_assert (idx
>= 0);
6887 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6888 /* Make sure it is accessible. */
6889 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6890 tf_warning_or_error
);
6894 /* Call build_cleanup before we enter the anonymous function so
6895 that any access checks will be done relative to the current
6896 scope, rather than the scope of the anonymous function. */
6897 build_cleanup (decl
);
6899 /* Now start the function. */
6900 cleanup
= start_cleanup_fn ();
6902 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6903 to the original function, rather than the anonymous one. That
6904 will make the back end think that nested functions are in use,
6905 which causes confusion. */
6906 push_deferring_access_checks (dk_no_check
);
6907 fcall
= build_cleanup (decl
);
6908 pop_deferring_access_checks ();
6910 /* Create the body of the anonymous function. */
6911 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6912 finish_expr_stmt (fcall
);
6913 finish_compound_stmt (compound_stmt
);
6917 /* Call atexit with the cleanup function. */
6918 mark_used (cleanup
);
6919 cleanup
= build_address (cleanup
);
6921 if (DECL_THREAD_LOCAL_P (decl
))
6922 atex_node
= get_thread_atexit_node ();
6924 atex_node
= get_atexit_node ();
6928 /* We must convert CLEANUP to the type that "__cxa_atexit"
6930 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6931 /* "__cxa_atexit" will pass the address of DECL to the
6932 cleanup function. */
6934 addr
= build_address (decl
);
6935 /* The declared type of the parameter to "__cxa_atexit" is
6936 "void *". For plain "T*", we could just let the
6937 machinery in cp_build_function_call convert it -- but if the
6938 type is "cv-qualified T *", then we need to convert it
6939 before passing it in, to avoid spurious errors. */
6940 addr
= build_nop (ptr_type_node
, addr
);
6943 /* Since the cleanup functions we build ignore the address
6944 they're given, there's no reason to pass the actual address
6945 in, and, in general, it's cheaper to pass NULL than any
6947 addr
= null_pointer_node
;
6950 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6951 tf_warning_or_error
);
6953 /* Just pass NULL to the dso handle parm if we don't actually
6954 have a DSO handle on this target. */
6955 arg2
= null_pointer_node
;
6961 if (!DECL_THREAD_LOCAL_P (decl
)
6962 && targetm
.cxx
.use_aeabi_atexit ())
6978 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6979 arg0
, arg1
, arg2
, NULL_TREE
);
6982 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6983 is its initializer. Generate code to handle the construction
6984 and destruction of DECL. */
6987 expand_static_init (tree decl
, tree init
)
6989 gcc_assert (VAR_P (decl
));
6990 gcc_assert (TREE_STATIC (decl
));
6992 /* Some variables require no dynamic initialization. */
6994 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6996 /* Make sure the destructor is callable. */
6997 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7001 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7002 && !DECL_FUNCTION_SCOPE_P (decl
))
7005 error ("non-local variable %qD declared %<__thread%> "
7006 "needs dynamic initialization", decl
);
7008 error ("non-local variable %qD declared %<__thread%> "
7009 "has a non-trivial destructor", decl
);
7010 static bool informed
;
7013 inform (DECL_SOURCE_LOCATION (decl
),
7014 "C++11 %<thread_local%> allows dynamic initialization "
7021 if (DECL_FUNCTION_SCOPE_P (decl
))
7023 /* Emit code to perform this initialization but once. */
7024 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7025 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7026 tree guard
, guard_addr
;
7028 /* We don't need thread-safety code for thread-local vars. */
7029 bool thread_guard
= (flag_threadsafe_statics
7030 && !DECL_THREAD_LOCAL_P (decl
));
7032 /* Emit code to perform this initialization but once. This code
7035 static <type> guard;
7036 if (!guard.first_byte) {
7037 if (__cxa_guard_acquire (&guard)) {
7040 // Do initialization.
7041 flag = true; __cxa_guard_release (&guard);
7042 // Register variable for destruction at end of program.
7044 if (!flag) __cxa_guard_abort (&guard);
7048 Note that the `flag' variable is only set to 1 *after* the
7049 initialization is complete. This ensures that an exception,
7050 thrown during the construction, will cause the variable to
7051 reinitialized when we pass through this code again, as per:
7055 If the initialization exits by throwing an exception, the
7056 initialization is not complete, so it will be tried again
7057 the next time control enters the declaration.
7059 This process should be thread-safe, too; multiple threads
7060 should not be able to initialize the variable more than
7063 /* Create the guard variable. */
7064 guard
= get_guard (decl
);
7066 /* This optimization isn't safe on targets with relaxed memory
7067 consistency. On such targets we force synchronization in
7068 __cxa_guard_acquire. */
7069 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7071 /* Begin the conditional initialization. */
7072 if_stmt
= begin_if_stmt ();
7073 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7074 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7079 tree vfntype
= NULL_TREE
;
7080 tree acquire_name
, release_name
, abort_name
;
7081 tree acquire_fn
, release_fn
, abort_fn
;
7082 guard_addr
= build_address (guard
);
7084 acquire_name
= get_identifier ("__cxa_guard_acquire");
7085 release_name
= get_identifier ("__cxa_guard_release");
7086 abort_name
= get_identifier ("__cxa_guard_abort");
7087 acquire_fn
= identifier_global_value (acquire_name
);
7088 release_fn
= identifier_global_value (release_name
);
7089 abort_fn
= identifier_global_value (abort_name
);
7091 acquire_fn
= push_library_fn
7092 (acquire_name
, build_function_type_list (integer_type_node
,
7093 TREE_TYPE (guard_addr
),
7095 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7096 if (!release_fn
|| !abort_fn
)
7097 vfntype
= build_function_type_list (void_type_node
,
7098 TREE_TYPE (guard_addr
),
7101 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7102 ECF_NOTHROW
| ECF_LEAF
);
7104 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7105 ECF_NOTHROW
| ECF_LEAF
);
7107 inner_if_stmt
= begin_if_stmt ();
7108 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7111 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7112 begin
= get_target_expr (boolean_false_node
);
7113 flag
= TARGET_EXPR_SLOT (begin
);
7115 TARGET_EXPR_CLEANUP (begin
)
7116 = build3 (COND_EXPR
, void_type_node
, flag
,
7118 build_call_n (abort_fn
, 1, guard_addr
));
7119 CLEANUP_EH_ONLY (begin
) = 1;
7121 /* Do the initialization itself. */
7122 init
= add_stmt_to_compound (begin
, init
);
7123 init
= add_stmt_to_compound
7124 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7125 init
= add_stmt_to_compound
7126 (init
, build_call_n (release_fn
, 1, guard_addr
));
7129 init
= add_stmt_to_compound (init
, set_guard (guard
));
7131 /* Use atexit to register a function for destroying this static
7133 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7135 finish_expr_stmt (init
);
7139 finish_compound_stmt (inner_then_clause
);
7140 finish_then_clause (inner_if_stmt
);
7141 finish_if_stmt (inner_if_stmt
);
7144 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7146 finish_compound_stmt (then_clause
);
7147 finish_then_clause (if_stmt
);
7148 finish_if_stmt (if_stmt
);
7151 else if (DECL_THREAD_LOCAL_P (decl
))
7152 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7154 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7158 /* Make TYPE a complete type based on INITIAL_VALUE.
7159 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7160 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7161 3 if the initializer list is empty (in pedantic mode). */
7164 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7167 tree type
, elt_type
;
7169 /* Don't get confused by a CONSTRUCTOR for some other type. */
7170 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7171 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7176 unsigned HOST_WIDE_INT i
;
7179 /* An array of character type can be initialized from a
7180 brace-enclosed string constant.
7182 FIXME: this code is duplicated from reshape_init. Probably
7183 we should just call reshape_init here? */
7184 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7185 && TREE_CODE (initial_value
) == CONSTRUCTOR
7186 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7188 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7189 tree value
= (*v
)[0].value
;
7191 if (TREE_CODE (value
) == STRING_CST
7192 && v
->length () == 1)
7193 initial_value
= value
;
7196 /* If any of the elements are parameter packs, we can't actually
7197 complete this type now because the array size is dependent. */
7198 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7200 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7203 if (PACK_EXPANSION_P (value
))
7209 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7211 /* We can create the array before the element type is complete, which
7212 means that we didn't have these two bits set in the original type
7213 either. In completing the type, we are expected to propagate these
7214 bits. See also complete_type which does the same thing for arrays
7217 if (TYPE_DOMAIN (type
))
7219 elt_type
= TREE_TYPE (type
);
7220 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7221 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7222 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7228 /* As above, but either give an error or reject zero-size arrays, depending
7232 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7233 bool do_default
, tsubst_flags_t complain
)
7236 bool sfinae
= !(complain
& tf_error
);
7237 /* In SFINAE context we can't be lenient about zero-size arrays. */
7240 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7246 /* Not an error. */;
7247 else if (failure
== 1)
7248 error ("initializer fails to determine size of %qT", *ptype
);
7249 else if (failure
== 2)
7252 error ("array size missing in %qT", *ptype
);
7254 else if (failure
== 3)
7255 error ("zero-size array %qT", *ptype
);
7256 *ptype
= error_mark_node
;
7261 /* Return zero if something is declared to be a member of type
7262 CTYPE when in the context of CUR_TYPE. STRING is the error
7263 message to print in that case. Otherwise, quietly return 1. */
7266 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7268 if (ctype
&& ctype
!= cur_type
)
7270 if (flags
== DTOR_FLAG
)
7271 error ("destructor for alien class %qT cannot be a member", ctype
);
7273 error ("constructor for alien class %qT cannot be a member", ctype
);
7279 /* Subroutine of `grokdeclarator'. */
7281 /* Generate errors possibly applicable for a given set of specifiers.
7282 This is for ARM $7.1.2. */
7285 bad_specifiers (tree object
,
7286 enum bad_spec_place type
,
7297 error ("%qD declared as a %<virtual%> variable", object
);
7299 error ("%qD declared as an %<inline%> variable", object
);
7301 error ("%<const%> and %<volatile%> function specifiers on "
7302 "%qD invalid in variable declaration", object
);
7306 error ("%qD declared as a %<virtual%> parameter", object
);
7308 error ("%qD declared as an %<inline%> parameter", object
);
7310 error ("%<const%> and %<volatile%> function specifiers on "
7311 "%qD invalid in parameter declaration", object
);
7315 error ("%qD declared as a %<virtual%> type", object
);
7317 error ("%qD declared as an %<inline%> type", object
);
7319 error ("%<const%> and %<volatile%> function specifiers on "
7320 "%qD invalid in type declaration", object
);
7324 error ("%qD declared as a %<virtual%> field", object
);
7326 error ("%qD declared as an %<inline%> field", object
);
7328 error ("%<const%> and %<volatile%> function specifiers on "
7329 "%qD invalid in field declaration", object
);
7335 error ("%q+D declared as a friend", object
);
7337 && (TREE_CODE (object
) == TYPE_DECL
7338 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7339 && !TYPE_REFFN_P (TREE_TYPE (object
))
7340 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7341 error ("%q+D declared with an exception specification", object
);
7344 /* DECL is a member function or static data member and is presently
7345 being defined. Check that the definition is taking place in a
7349 check_class_member_definition_namespace (tree decl
)
7351 /* These checks only apply to member functions and static data
7353 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7354 /* We check for problems with specializations in pt.c in
7355 check_specialization_namespace, where we can issue better
7357 if (processing_specialization
)
7359 /* There are no restrictions on the placement of
7360 explicit instantiations. */
7361 if (processing_explicit_instantiation
)
7365 A member function definition that appears outside of the
7366 class definition shall appear in a namespace scope enclosing
7367 the class definition.
7371 The definition for a static data member shall appear in a
7372 namespace scope enclosing the member's class definition. */
7373 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7374 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7375 decl
, DECL_CONTEXT (decl
));
7378 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7379 METHOD_TYPE for a non-static member function; QUALS are the
7380 cv-qualifiers that apply to the function. */
7383 build_this_parm (tree type
, cp_cv_quals quals
)
7388 cp_cv_quals this_quals
;
7390 if (CLASS_TYPE_P (type
))
7393 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7394 this_type
= build_pointer_type (this_type
);
7397 this_type
= type_of_this_parm (type
);
7398 /* The `this' parameter is implicitly `const'; it cannot be
7400 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7401 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7402 parm
= build_artificial_parm (this_identifier
, qual_type
);
7403 cp_apply_type_quals_to_decl (this_quals
, parm
);
7407 /* DECL is a static member function. Complain if it was declared
7408 with function-cv-quals. */
7411 check_static_quals (tree decl
, cp_cv_quals quals
)
7413 if (quals
!= TYPE_UNQUALIFIED
)
7414 error ("static member function %q#D declared with type qualifiers",
7418 /* Helper function. Replace the temporary this parameter injected
7419 during cp_finish_omp_declare_simd with the real this parameter. */
7422 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7424 tree this_parm
= (tree
) data
;
7425 if (TREE_CODE (*tp
) == PARM_DECL
7426 && DECL_NAME (*tp
) == this_identifier
7427 && *tp
!= this_parm
)
7429 else if (TYPE_P (*tp
))
7434 /* CTYPE is class type, or null if non-class.
7435 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7437 DECLARATOR is the function's name.
7438 PARMS is a chain of PARM_DECLs for the function.
7439 VIRTUALP is truthvalue of whether the function is virtual or not.
7440 FLAGS are to be passed through to `grokclassfn'.
7441 QUALS are qualifiers indicating whether the function is `const'
7443 RAISES is a list of exceptions that this function can raise.
7444 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7445 not look, and -1 if we should not call `grokclassfn' at all.
7447 SFK is the kind of special function (if any) for the new function.
7449 Returns `NULL_TREE' if something goes wrong, after issuing
7450 applicable error messages. */
7453 grokfndecl (tree ctype
,
7457 tree orig_declarator
,
7459 enum overload_flags flags
,
7461 cp_ref_qualifier rqual
,
7467 special_function_kind sfk
,
7472 location_t location
)
7475 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7479 type
= build_ref_qualified_type (type
, rqual
);
7481 type
= build_exception_variant (type
, raises
);
7483 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7485 /* If we have an explicit location, use it, otherwise use whatever
7486 build_lang_decl used (probably input_location). */
7487 if (location
!= UNKNOWN_LOCATION
)
7488 DECL_SOURCE_LOCATION (decl
) = location
;
7490 if (TREE_CODE (type
) == METHOD_TYPE
)
7493 parm
= build_this_parm (type
, quals
);
7494 DECL_CHAIN (parm
) = parms
;
7497 DECL_ARGUMENTS (decl
) = parms
;
7498 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7499 DECL_CONTEXT (t
) = decl
;
7500 /* Propagate volatile out from type to decl. */
7501 if (TYPE_VOLATILE (type
))
7502 TREE_THIS_VOLATILE (decl
) = 1;
7504 /* Setup decl according to sfk. */
7507 case sfk_constructor
:
7508 case sfk_copy_constructor
:
7509 case sfk_move_constructor
:
7510 DECL_CONSTRUCTOR_P (decl
) = 1;
7512 case sfk_destructor
:
7513 DECL_DESTRUCTOR_P (decl
) = 1;
7519 /* If pointers to member functions use the least significant bit to
7520 indicate whether a function is virtual, ensure a pointer
7521 to this function will have that bit clear. */
7522 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7523 && TREE_CODE (type
) == METHOD_TYPE
7524 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7525 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7528 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7532 ("defining explicit specialization %qD in friend declaration",
7536 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7537 tree args
= TREE_OPERAND (orig_declarator
, 1);
7539 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7541 /* Something like `template <class T> friend void f<T>()'. */
7542 error ("invalid use of template-id %qD in declaration "
7543 "of primary template",
7549 /* A friend declaration of the form friend void f<>(). Record
7550 the information in the TEMPLATE_ID_EXPR. */
7551 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7553 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7554 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7556 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7557 if (TREE_PURPOSE (t
)
7558 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7560 error ("default arguments are not allowed in declaration "
7561 "of friend template specialization %qD",
7567 error ("%<inline%> is not allowed in declaration of friend "
7568 "template specialization %qD",
7571 error ("%<constexpr%> is not allowed in declaration of friend "
7572 "template specialization %qD",
7579 /* If this decl has namespace scope, set that up. */
7581 set_decl_namespace (decl
, in_namespace
, friendp
);
7583 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7585 /* `main' and builtins have implicit 'C' linkage. */
7586 if ((MAIN_NAME_P (declarator
)
7587 || (IDENTIFIER_LENGTH (declarator
) > 10
7588 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7589 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7590 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7591 || (targetcm
.cxx_implicit_extern_c
7592 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7593 && current_lang_name
== lang_name_cplusplus
7594 && ctype
== NULL_TREE
7595 && DECL_FILE_SCOPE_P (decl
))
7596 SET_DECL_LANGUAGE (decl
, lang_c
);
7598 /* Should probably propagate const out from type to decl I bet (mrs). */
7601 DECL_STATIC_FUNCTION_P (decl
) = 1;
7602 DECL_CONTEXT (decl
) = ctype
;
7607 DECL_CONTEXT (decl
) = ctype
;
7609 check_class_member_definition_namespace (decl
);
7612 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7614 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7615 error ("cannot declare %<::main%> to be a template");
7617 error ("cannot declare %<::main%> to be inline");
7619 error ("cannot declare %<::main%> to be constexpr");
7621 error ("cannot declare %<::main%> to be static");
7626 /* Members of anonymous types and local classes have no linkage; make
7627 them internal. If a typedef is made later, this will be changed. */
7628 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7629 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7632 if (publicp
&& cxx_dialect
== cxx98
)
7634 /* [basic.link]: A name with no linkage (notably, the name of a class
7635 or enumeration declared in a local scope) shall not be used to
7636 declare an entity with linkage.
7638 DR 757 relaxes this restriction for C++0x. */
7639 no_linkage_error (decl
);
7642 TREE_PUBLIC (decl
) = publicp
;
7645 DECL_INTERFACE_KNOWN (decl
) = 1;
7646 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7649 /* If the declaration was declared inline, mark it as such. */
7651 DECL_DECLARED_INLINE_P (decl
) = 1;
7653 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7655 DECL_EXTERNAL (decl
) = 1;
7656 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7661 ? G_("static member function %qD cannot have cv-qualifier")
7662 : G_("non-member function %qD cannot have cv-qualifier"),
7664 quals
= TYPE_UNQUALIFIED
;
7670 ? G_("static member function %qD cannot have ref-qualifier")
7671 : G_("non-member function %qD cannot have ref-qualifier"),
7673 rqual
= REF_QUAL_NONE
;
7677 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7678 && !grok_op_properties (decl
, /*complain=*/true))
7680 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7682 bool long_long_unsigned_p
;
7684 const char *suffix
= NULL
;
7685 /* [over.literal]/6: Literal operators shall not have C linkage. */
7686 if (DECL_LANGUAGE (decl
) == lang_c
)
7688 error ("literal operator with C linkage");
7692 if (DECL_NAMESPACE_SCOPE_P (decl
))
7694 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7697 error ("%qD has invalid argument list", decl
);
7701 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7702 if (long_long_unsigned_p
)
7704 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7705 warning (0, "integer suffix %<%s%>"
7706 " shadowed by implementation", suffix
);
7708 else if (long_double_p
)
7710 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7711 warning (0, "floating point suffix %<%s%>"
7712 " shadowed by implementation", suffix
);
7717 error ("%qD must be a non-member function", decl
);
7723 /* Make the init_value nonzero so pushdecl knows this is not
7724 tentative. error_mark_node is replaced later with the BLOCK. */
7725 DECL_INITIAL (decl
) = error_mark_node
;
7727 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7728 TREE_NOTHROW (decl
) = 1;
7730 if (flag_openmp
|| flag_cilkplus
)
7732 /* Adjust "omp declare simd" attributes. */
7733 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7737 for (attr
= ods
; attr
;
7738 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7740 if (TREE_CODE (type
) == METHOD_TYPE
)
7741 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7742 DECL_ARGUMENTS (decl
), NULL
);
7743 if (TREE_VALUE (attr
) != NULL_TREE
)
7745 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7746 cl
= c_omp_declare_simd_clauses_to_numbers
7747 (DECL_ARGUMENTS (decl
), cl
);
7749 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7751 TREE_VALUE (attr
) = NULL_TREE
;
7757 /* Caller will do the rest of this. */
7761 if (ctype
!= NULL_TREE
)
7762 grokclassfn (ctype
, decl
, flags
);
7765 if (cxx_dialect
>= cxx11
7766 && DECL_DESTRUCTOR_P (decl
)
7767 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7768 && !processing_template_decl
)
7769 deduce_noexcept_on_destructor (decl
);
7771 decl
= check_explicit_specialization (orig_declarator
, decl
,
7774 4 * (friendp
!= 0));
7775 if (decl
== error_mark_node
)
7778 if (DECL_STATIC_FUNCTION_P (decl
))
7779 check_static_quals (decl
, quals
);
7783 cplus_decl_attributes (&decl
, *attrlist
, 0);
7784 *attrlist
= NULL_TREE
;
7787 /* Check main's type after attributes have been applied. */
7788 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7790 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7793 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7795 error ("%<::main%> must return %<int%>");
7796 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7797 TREE_TYPE (decl
) = newtype
;
7800 check_main_parameter_types (decl
);
7803 if (ctype
!= NULL_TREE
7804 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7807 tree old_decl
= check_classfn (ctype
, decl
,
7808 (processing_template_decl
7809 > template_class_depth (ctype
))
7810 ? current_template_parms
7813 if (old_decl
== error_mark_node
)
7821 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7822 /* Because grokfndecl is always supposed to return a
7823 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7824 here. We depend on our callers to figure out that its
7825 really a template that's being returned. */
7826 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7828 if (DECL_STATIC_FUNCTION_P (old_decl
)
7829 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7831 /* Remove the `this' parm added by grokclassfn. */
7832 revert_static_member_fn (decl
);
7833 check_static_quals (decl
, quals
);
7835 if (DECL_ARTIFICIAL (old_decl
))
7837 error ("definition of implicitly-declared %qD", old_decl
);
7840 else if (DECL_DEFAULTED_FN (old_decl
))
7842 error ("definition of explicitly-defaulted %q+D", decl
);
7843 error ("%q+#D explicitly defaulted here", old_decl
);
7847 /* Since we've smashed OLD_DECL to its
7848 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7849 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7850 decl
= DECL_TEMPLATE_RESULT (decl
);
7852 /* Attempt to merge the declarations. This can fail, in
7853 the case of some invalid specialization declarations. */
7854 pushed_scope
= push_scope (ctype
);
7855 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7857 pop_scope (pushed_scope
);
7860 error ("no %q#D member function declared in class %qT",
7864 if (ok
== error_mark_node
)
7870 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7873 if (ctype
== NULL_TREE
|| check
)
7877 DECL_VIRTUAL_P (decl
) = 1;
7882 /* decl is a FUNCTION_DECL.
7883 specifiers are the parsed virt-specifiers.
7885 Set flags to reflect the virt-specifiers.
7890 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7892 if (decl
== NULL_TREE
)
7894 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7895 DECL_OVERRIDE_P (decl
) = 1;
7896 if (specifiers
& VIRT_SPEC_FINAL
)
7897 DECL_FINAL_P (decl
) = 1;
7901 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7902 the linkage that DECL will receive in the object file. */
7905 set_linkage_for_static_data_member (tree decl
)
7907 /* A static data member always has static storage duration and
7908 external linkage. Note that static data members are forbidden in
7909 local classes -- the only situation in which a class has
7910 non-external linkage. */
7911 TREE_PUBLIC (decl
) = 1;
7912 TREE_STATIC (decl
) = 1;
7913 /* For non-template classes, static data members are always put
7914 out in exactly those files where they are defined, just as
7915 with ordinary namespace-scope variables. */
7916 if (!processing_template_decl
)
7917 DECL_INTERFACE_KNOWN (decl
) = 1;
7920 /* Create a VAR_DECL named NAME with the indicated TYPE.
7922 If SCOPE is non-NULL, it is the class type or namespace containing
7923 the variable. If SCOPE is NULL, the variable should is created in
7924 the innermost enclosing scope. */
7927 grokvardecl (tree type
,
7929 const cp_decl_specifier_seq
*declspecs
,
7935 tree explicit_scope
;
7937 gcc_assert (!name
|| identifier_p (name
));
7939 /* Compute the scope in which to place the variable, but remember
7940 whether or not that scope was explicitly specified by the user. */
7941 explicit_scope
= scope
;
7944 /* An explicit "extern" specifier indicates a namespace-scope
7946 if (declspecs
->storage_class
== sc_extern
)
7947 scope
= current_decl_namespace ();
7948 else if (!at_function_scope_p ())
7949 scope
= current_scope ();
7953 && (/* If the variable is a namespace-scope variable declared in a
7954 template, we need DECL_LANG_SPECIFIC. */
7955 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7956 /* Similarly for namespace-scope variables with language linkage
7958 || (TREE_CODE (scope
) == NAMESPACE_DECL
7959 && current_lang_name
!= lang_name_cplusplus
)
7960 /* Similarly for static data members. */
7962 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7964 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7966 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7967 set_decl_namespace (decl
, explicit_scope
, 0);
7969 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7971 if (declspecs
->storage_class
== sc_extern
)
7973 DECL_THIS_EXTERN (decl
) = 1;
7974 DECL_EXTERNAL (decl
) = !initialized
;
7977 if (DECL_CLASS_SCOPE_P (decl
))
7979 set_linkage_for_static_data_member (decl
);
7980 /* This function is only called with out-of-class definitions. */
7981 DECL_EXTERNAL (decl
) = 0;
7982 check_class_member_definition_namespace (decl
);
7984 /* At top level, either `static' or no s.c. makes a definition
7985 (perhaps tentative), and absence of `static' makes it public. */
7986 else if (toplevel_bindings_p ())
7988 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7989 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7990 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7992 /* Not at top level, only `static' makes a static definition. */
7995 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7996 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7999 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8001 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
8002 if (declspecs
->gnu_thread_keyword_p
)
8003 DECL_GNU_TLS_P (decl
) = true;
8006 /* If the type of the decl has no linkage, make sure that we'll
8007 notice that in mark_used. */
8008 if (cxx_dialect
> cxx98
8009 && decl_linkage (decl
) != lk_none
8010 && DECL_LANG_SPECIFIC (decl
) == NULL
8011 && !DECL_EXTERN_C_P (decl
)
8012 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8013 retrofit_lang_decl (decl
);
8015 if (TREE_PUBLIC (decl
))
8017 /* [basic.link]: A name with no linkage (notably, the name of a class
8018 or enumeration declared in a local scope) shall not be used to
8019 declare an entity with linkage.
8021 DR 757 relaxes this restriction for C++0x. */
8022 if (cxx_dialect
< cxx11
)
8023 no_linkage_error (decl
);
8026 DECL_INTERFACE_KNOWN (decl
) = 1;
8031 /* Create and return a canonical pointer to member function type, for
8032 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8035 build_ptrmemfunc_type (tree type
)
8039 tree unqualified_variant
= NULL_TREE
;
8041 if (type
== error_mark_node
)
8044 /* If a canonical type already exists for this type, use it. We use
8045 this method instead of type_hash_canon, because it only does a
8046 simple equality check on the list of field members. */
8048 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8051 /* Make sure that we always have the unqualified pointer-to-member
8053 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8055 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8057 t
= make_class_type (RECORD_TYPE
);
8058 xref_basetypes (t
, NULL_TREE
);
8060 /* Let the front end know this is a pointer to member function... */
8061 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8062 /* ... and not really a class type. */
8063 SET_CLASS_TYPE_P (t
, 0);
8065 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8068 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8070 DECL_CHAIN (field
) = fields
;
8073 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8075 /* Zap out the name so that the back end will give us the debugging
8076 information for this anonymous RECORD_TYPE. */
8077 TYPE_NAME (t
) = NULL_TREE
;
8079 /* If this is not the unqualified form of this pointer-to-member
8080 type, set the TYPE_MAIN_VARIANT for this type to be the
8081 unqualified type. Since they are actually RECORD_TYPEs that are
8082 not variants of each other, we must do this manually.
8083 As we just built a new type there is no need to do yet another copy. */
8084 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8086 int type_quals
= cp_type_quals (type
);
8087 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8088 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8089 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8090 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8091 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8092 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8093 TREE_TYPE (TYPE_BINFO (t
)) = t
;
8096 /* Cache this pointer-to-member type so that we can find it again
8098 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8100 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8101 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8102 else if (TYPE_CANONICAL (type
) != type
)
8103 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8108 /* Create and return a pointer to data member type. */
8111 build_ptrmem_type (tree class_type
, tree member_type
)
8113 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8115 cp_cv_quals quals
= type_memfn_quals (member_type
);
8116 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8117 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8118 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8122 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8123 return build_offset_type (class_type
, member_type
);
8127 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8128 Check to see that the definition is valid. Issue appropriate error
8129 messages. Return 1 if the definition is particularly bad, or 0
8133 check_static_variable_definition (tree decl
, tree type
)
8135 /* Can't check yet if we don't know the type. */
8136 if (dependent_type_p (type
))
8138 /* If DECL is declared constexpr, we'll do the appropriate checks
8139 in check_initializer. */
8140 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8142 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8144 if (!COMPLETE_TYPE_P (type
))
8145 error ("in-class initialization of static data member %q#D of "
8146 "incomplete type", decl
);
8147 else if (literal_type_p (type
))
8148 permerror (input_location
,
8149 "%<constexpr%> needed for in-class initialization of "
8150 "static data member %q#D of non-integral type", decl
);
8152 error ("in-class initialization of static data member %q#D of "
8153 "non-literal type", decl
);
8157 /* Motion 10 at San Diego: If a static const integral data member is
8158 initialized with an integral constant expression, the initializer
8159 may appear either in the declaration (within the class), or in
8160 the definition, but not both. If it appears in the class, the
8161 member is a member constant. The file-scope definition is always
8163 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8165 error ("invalid in-class initialization of static data member "
8166 "of non-integral type %qT",
8170 else if (!CP_TYPE_CONST_P (type
))
8171 error ("ISO C++ forbids in-class initialization of non-const "
8172 "static member %qD",
8174 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8175 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8176 "%qD of non-integral type %qT", decl
, type
);
8181 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8182 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8183 expressions out into temporary variables so that walk_tree doesn't
8184 step into them (c++/15764). */
8187 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8189 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8190 tree expr
= *expr_p
;
8191 if (TREE_CODE (expr
) == SAVE_EXPR
)
8193 tree op
= TREE_OPERAND (expr
, 0);
8194 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8195 if (TREE_SIDE_EFFECTS (op
))
8196 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8199 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8204 /* Entry point for the above. */
8207 stabilize_vla_size (tree size
)
8209 struct pointer_set_t
*pset
= pointer_set_create ();
8210 /* Break out any function calls into temporary variables. */
8211 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8212 pointer_set_destroy (pset
);
8215 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8216 not inside of SAVE_EXPR and fold them. */
8219 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8221 tree expr
= *expr_p
;
8222 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8224 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8226 *(bool *)data
= true;
8227 if (SIZEOF_EXPR_TYPE_P (expr
))
8228 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8229 SIZEOF_EXPR
, false);
8230 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8231 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8234 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8236 if (expr
== error_mark_node
)
8237 expr
= size_one_node
;
8244 /* Given the SIZE (i.e., number of elements) in an array, compute an
8245 appropriate index type for the array. If non-NULL, NAME is the
8246 name of the thing being declared. */
8249 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8253 tree abi_1_itype
= NULL_TREE
;
8255 if (error_operand_p (size
))
8256 return error_mark_node
;
8258 if (!type_dependent_expression_p (size
))
8260 tree type
= TREE_TYPE (size
);
8262 mark_rvalue_use (size
);
8264 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8265 && TREE_SIDE_EFFECTS (size
))
8266 /* In C++98, we mark a non-constant array bound with a magic
8267 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8270 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8272 if (CLASS_TYPE_P (type
)
8273 && CLASSTYPE_LITERAL_P (type
))
8275 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8278 if (!(complain
& tf_error
))
8279 return error_mark_node
;
8281 error ("size of array %qD has non-integral type %qT",
8284 error ("size of array has non-integral type %qT", type
);
8285 size
= integer_one_node
;
8287 if (size
== error_mark_node
)
8288 return error_mark_node
;
8289 type
= TREE_TYPE (size
);
8290 /* We didn't support this case in GCC 3.2, so don't bother
8291 trying to model it now in ABI v1. */
8292 abi_1_itype
= error_mark_node
;
8295 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8296 size
= maybe_constant_value (size
);
8298 if (!TREE_CONSTANT (size
))
8302 if (error_operand_p (size
))
8303 return error_mark_node
;
8305 /* The array bound must be an integer type. */
8306 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8308 if (!(complain
& tf_error
))
8309 return error_mark_node
;
8311 error ("size of array %qD has non-integral type %qT", name
, type
);
8313 error ("size of array has non-integral type %qT", type
);
8314 size
= integer_one_node
;
8315 type
= TREE_TYPE (size
);
8319 /* A type is dependent if it is...an array type constructed from any
8320 dependent type or whose size is specified by a constant expression
8321 that is value-dependent. */
8322 /* We can only call value_dependent_expression_p on integral constant
8323 expressions; treat non-constant expressions as dependent, too. */
8324 if (processing_template_decl
8325 && (type_dependent_expression_p (size
)
8326 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8328 /* We cannot do any checking for a SIZE that isn't known to be
8329 constant. Just build the index type and mark that it requires
8330 structural equality checks. */
8331 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8332 size
, size_one_node
));
8333 TYPE_DEPENDENT_P (itype
) = 1;
8334 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8335 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8339 if (!abi_version_at_least (2) && processing_template_decl
8340 && abi_1_itype
== NULL_TREE
)
8341 /* For abi-1, we handled all instances in templates the same way,
8342 even when they were non-dependent. This affects the manglings
8343 produced. So, we do the normal checking for non-dependent
8344 sizes, but at the end we'll return the same type that abi-1
8345 would have, but with TYPE_CANONICAL set to the "right"
8346 value that the current ABI would provide. */
8347 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8348 osize
, integer_one_node
));
8350 /* Normally, the array-bound will be a constant. */
8351 if (TREE_CODE (size
) == INTEGER_CST
)
8353 /* Check to see if the array bound overflowed. Make that an
8354 error, no matter how generous we're being. */
8355 constant_expression_error (size
);
8357 /* An array must have a positive number of elements. */
8358 if (tree_int_cst_lt (size
, integer_zero_node
))
8360 if (!(complain
& tf_error
))
8361 return error_mark_node
;
8363 error ("size of array %qD is negative", name
);
8365 error ("size of array is negative");
8366 size
= integer_one_node
;
8368 /* As an extension we allow zero-sized arrays. */
8369 else if (integer_zerop (size
))
8371 if (!(complain
& tf_error
))
8372 /* We must fail if performing argument deduction (as
8373 indicated by the state of complain), so that
8374 another substitution can be found. */
8375 return error_mark_node
;
8376 else if (in_system_header_at (input_location
))
8377 /* Allow them in system headers because glibc uses them. */;
8379 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8381 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8384 else if (TREE_CONSTANT (size
)
8385 /* We don't allow VLAs at non-function scopes, or during
8386 tentative template substitution. */
8387 || !at_function_scope_p ()
8388 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8390 if (!(complain
& tf_error
))
8391 return error_mark_node
;
8392 /* `(int) &fn' is not a valid array bound. */
8394 error ("size of array %qD is not an integral constant-expression",
8397 error ("size of array is not an integral constant-expression");
8398 size
= integer_one_node
;
8400 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8403 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8405 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8407 else if (warn_vla
> 0)
8411 "variable length array %qD is used", name
);
8414 "variable length array is used");
8417 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8418 /* A variable sized array. */
8419 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8422 HOST_WIDE_INT saved_processing_template_decl
;
8424 /* Compute the index of the largest element in the array. It is
8425 one less than the number of elements in the array. We save
8426 and restore PROCESSING_TEMPLATE_DECL so that computations in
8427 cp_build_binary_op will be appropriately folded. */
8428 saved_processing_template_decl
= processing_template_decl
;
8429 processing_template_decl
= 0;
8430 itype
= cp_build_binary_op (input_location
,
8432 cp_convert (ssizetype
, size
, complain
),
8433 cp_convert (ssizetype
, integer_one_node
,
8436 itype
= fold (itype
);
8437 processing_template_decl
= saved_processing_template_decl
;
8439 if (!TREE_CONSTANT (itype
))
8441 /* A variable sized array. */
8442 itype
= variable_size (itype
);
8444 if (TREE_CODE (itype
) != SAVE_EXPR
)
8446 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8447 they might survive till gimplification. */
8448 tree newitype
= itype
;
8450 cp_walk_tree_without_duplicates (&newitype
,
8451 fold_sizeof_expr_r
, &found
);
8453 itype
= variable_size (fold (newitype
));
8456 stabilize_vla_size (itype
);
8458 if (cxx_dialect
>= cxx1y
&& flag_exceptions
)
8460 /* If the VLA bound is larger than half the address space,
8461 or less than zero, throw std::bad_array_length. */
8462 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8464 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8465 throw_bad_array_length (), void_node
);
8466 finish_expr_stmt (comp
);
8468 else if (flag_sanitize
& SANITIZE_VLA
)
8470 /* From C++1y onwards, we throw an exception on a negative
8471 length size of an array; see above. */
8473 /* We have to add 1 -- in the ubsan routine we generate
8474 LE_EXPR rather than LT_EXPR. */
8475 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8476 build_one_cst (TREE_TYPE (itype
)));
8477 t
= ubsan_instrument_vla (input_location
, t
);
8478 finish_expr_stmt (t
);
8481 /* Make sure that there was no overflow when creating to a signed
8482 index type. (For example, on a 32-bit machine, an array with
8483 size 2^32 - 1 is too big.) */
8484 else if (TREE_CODE (itype
) == INTEGER_CST
8485 && TREE_OVERFLOW (itype
))
8487 if (!(complain
& tf_error
))
8488 return error_mark_node
;
8489 error ("overflow in array dimension");
8490 TREE_OVERFLOW (itype
) = 0;
8494 /* Create and return the appropriate index type. */
8495 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8497 tree t
= build_index_type (itype
);
8498 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8499 itype
= abi_1_itype
;
8502 itype
= build_index_type (itype
);
8504 /* If the index type were dependent, we would have returned early, so
8505 remember that it isn't. */
8506 TYPE_DEPENDENT_P (itype
) = 0;
8507 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8511 /* Returns the scope (if any) in which the entity declared by
8512 DECLARATOR will be located. If the entity was declared with an
8513 unqualified name, NULL_TREE is returned. */
8516 get_scope_of_declarator (const cp_declarator
*declarator
)
8518 while (declarator
&& declarator
->kind
!= cdk_id
)
8519 declarator
= declarator
->declarator
;
8521 /* If the declarator-id is a SCOPE_REF, the scope in which the
8522 declaration occurs is the first operand. */
8524 && declarator
->u
.id
.qualifying_scope
)
8525 return declarator
->u
.id
.qualifying_scope
;
8527 /* Otherwise, the declarator is not a qualified name; the entity will
8528 be declared in the current scope. */
8532 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8533 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8537 create_array_type_for_decl (tree name
, tree type
, tree size
)
8539 tree itype
= NULL_TREE
;
8541 /* If things have already gone awry, bail now. */
8542 if (type
== error_mark_node
|| size
== error_mark_node
)
8543 return error_mark_node
;
8545 /* 8.3.4/1: If the type of the identifier of D contains the auto
8546 type-specifier, the program is ill-formed. */
8547 if (pedantic
&& type_uses_auto (type
))
8548 pedwarn (input_location
, OPT_Wpedantic
,
8549 "declaration of %qD as array of %<auto%>", name
);
8551 /* If there are some types which cannot be array elements,
8552 issue an error-message and return. */
8553 switch (TREE_CODE (type
))
8557 error ("declaration of %qD as array of void", name
);
8559 error ("creating array of void");
8560 return error_mark_node
;
8564 error ("declaration of %qD as array of functions", name
);
8566 error ("creating array of functions");
8567 return error_mark_node
;
8569 case REFERENCE_TYPE
:
8571 error ("declaration of %qD as array of references", name
);
8573 error ("creating array of references");
8574 return error_mark_node
;
8578 error ("declaration of %qD as array of function members", name
);
8580 error ("creating array of function members");
8581 return error_mark_node
;
8589 The constant expressions that specify the bounds of the arrays
8590 can be omitted only for the first member of the sequence. */
8591 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8594 error ("declaration of %qD as multidimensional array must "
8595 "have bounds for all dimensions except the first",
8598 error ("multidimensional array must have bounds for all "
8599 "dimensions except the first");
8601 return error_mark_node
;
8604 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
8605 && (flag_iso
|| warn_vla
> 0))
8606 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8608 /* 8.3.4p1: ...if the type of the identifier of D contains the auto
8609 type-specifier, the program is ill-formed. */
8610 if (type_uses_auto (type
))
8612 error ("%qD declared as array of %qT", name
, type
);
8613 return error_mark_node
;
8616 /* Figure out the index type for the array. */
8618 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8621 T is called the array element type; this type shall not be [...] an
8622 abstract class type. */
8623 abstract_virtuals_error (name
, type
);
8625 return build_cplus_array_type (type
, itype
);
8628 /* Check that it's OK to declare a function with the indicated TYPE.
8629 SFK indicates the kind of special function (if any) that this
8630 function is. OPTYPE is the type given in a conversion operator
8631 declaration, or the class type for a constructor/destructor.
8632 Returns the actual return type of the function; that
8633 may be different than TYPE if an error occurs, or for certain
8634 special functions. */
8637 check_special_function_return_type (special_function_kind sfk
,
8643 case sfk_constructor
:
8645 error ("return type specification for constructor invalid");
8647 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8648 type
= build_pointer_type (optype
);
8650 type
= void_type_node
;
8653 case sfk_destructor
:
8655 error ("return type specification for destructor invalid");
8656 /* We can't use the proper return type here because we run into
8657 problems with ambiguous bases and covariant returns.
8658 Java classes are left unchanged because (void *) isn't a valid
8659 Java type, and we don't want to change the Java ABI. */
8660 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8661 type
= build_pointer_type (void_type_node
);
8663 type
= void_type_node
;
8666 case sfk_conversion
:
8668 error ("return type specified for %<operator %T%>", optype
);
8679 /* A variable or data member (whose unqualified name is IDENTIFIER)
8680 has been declared with the indicated TYPE. If the TYPE is not
8681 acceptable, issue an error message and return a type to use for
8682 error-recovery purposes. */
8685 check_var_type (tree identifier
, tree type
)
8687 if (VOID_TYPE_P (type
))
8690 error ("unnamed variable or field declared void");
8691 else if (identifier_p (identifier
))
8693 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8694 error ("variable or field %qE declared void", identifier
);
8697 error ("variable or field declared void");
8698 type
= error_mark_node
;
8704 /* Given declspecs and a declarator (abstract or otherwise), determine
8705 the name and type of the object declared and construct a DECL node
8708 DECLSPECS points to the representation of declaration-specifier
8709 sequence that precedes declarator.
8711 DECL_CONTEXT says which syntactic context this declaration is in:
8712 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8713 FUNCDEF for a function definition. Like NORMAL but a few different
8714 error messages in each case. Return value may be zero meaning
8715 this definition is too screwy to try to parse.
8716 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8717 handle member functions (which have FIELD context).
8718 Return value may be zero meaning this definition is too screwy to
8720 PARM for a parameter declaration (either within a function prototype
8721 or before a function body). Make a PARM_DECL, or return void_type_node.
8722 TPARM for a template parameter declaration.
8723 CATCHPARM for a parameter declaration before a catch clause.
8724 TYPENAME if for a typename (in a cast or sizeof).
8725 Don't make a DECL node; just return the ..._TYPE node.
8726 FIELD for a struct or union field; make a FIELD_DECL.
8727 BITFIELD for a field with specified width.
8729 INITIALIZED is as for start_decl.
8731 ATTRLIST is a pointer to the list of attributes, which may be NULL
8732 if there are none; *ATTRLIST may be modified if attributes from inside
8733 the declarator should be applied to the declaration.
8735 When this function is called, scoping variables (such as
8736 CURRENT_CLASS_TYPE) should reflect the scope in which the
8737 declaration occurs, not the scope in which the new declaration will
8738 be placed. For example, on:
8742 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8745 Returns a DECL (if a declarator is present), a TYPE (if there is no
8746 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8750 grokdeclarator (const cp_declarator
*declarator
,
8751 cp_decl_specifier_seq
*declspecs
,
8752 enum decl_context decl_context
,
8756 tree type
= NULL_TREE
;
8758 int explicit_int128
= 0;
8759 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8760 int explicit_int
= 0;
8761 int explicit_char
= 0;
8762 int defaulted_int
= 0;
8764 tree typedef_decl
= NULL_TREE
;
8765 const char *name
= NULL
;
8766 tree typedef_type
= NULL_TREE
;
8767 /* True if this declarator is a function definition. */
8768 bool funcdef_flag
= false;
8769 cp_declarator_kind innermost_code
= cdk_error
;
8772 /* See the code below that used this. */
8773 tree decl_attr
= NULL_TREE
;
8776 /* Keep track of what sort of function is being processed
8777 so that we can warn about default return values, or explicit
8778 return values which do not match prescribed defaults. */
8779 special_function_kind sfk
= sfk_none
;
8781 tree dname
= NULL_TREE
;
8782 tree ctor_return_type
= NULL_TREE
;
8783 enum overload_flags flags
= NO_SPECIAL
;
8784 /* cv-qualifiers that apply to the declarator, for a declaration of
8785 a member function. */
8786 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8787 /* virt-specifiers that apply to the declarator, for a declaration of
8788 a member function. */
8789 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8790 /* ref-qualifier that applies to the declarator, for a declaration of
8791 a member function. */
8792 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8793 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8795 tree raises
= NULL_TREE
;
8796 int template_count
= 0;
8797 tree returned_attrs
= NULL_TREE
;
8798 tree parms
= NULL_TREE
;
8799 const cp_declarator
*id_declarator
;
8800 /* The unqualified name of the declarator; either an
8801 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8802 tree unqualified_id
;
8803 /* The class type, if any, in which this entity is located,
8804 or NULL_TREE if none. Note that this value may be different from
8805 the current class type; for example if an attempt is made to declare
8806 "A::f" inside "B", this value will be "A". */
8807 tree ctype
= current_class_type
;
8808 /* The NAMESPACE_DECL for the namespace in which this entity is
8809 located. If an unqualified name is used to declare the entity,
8810 this value will be NULL_TREE, even if the entity is located at
8812 tree in_namespace
= NULL_TREE
;
8813 cp_storage_class storage_class
;
8814 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8815 bool type_was_error_mark_node
= false;
8816 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8817 bool template_type_arg
= false;
8818 bool template_parm_flag
= false;
8819 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8820 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8821 bool late_return_type_p
= false;
8822 source_location saved_loc
= input_location
;
8825 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8826 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8827 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8828 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8829 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8830 explicit_int128
= declspecs
->explicit_int128_p
;
8831 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8833 if (decl_context
== FUNCDEF
)
8834 funcdef_flag
= true, decl_context
= NORMAL
;
8835 else if (decl_context
== MEMFUNCDEF
)
8836 funcdef_flag
= true, decl_context
= FIELD
;
8837 else if (decl_context
== BITFIELD
)
8838 bitfield
= 1, decl_context
= FIELD
;
8839 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8840 template_type_arg
= true, decl_context
= TYPENAME
;
8841 else if (decl_context
== TPARM
)
8842 template_parm_flag
= true, decl_context
= PARM
;
8844 if (initialized
> 1)
8845 funcdef_flag
= true;
8847 /* Look inside a declarator for the name being declared
8848 and get it as a string, for an error message. */
8849 for (id_declarator
= declarator
;
8851 id_declarator
= id_declarator
->declarator
)
8853 if (id_declarator
->kind
!= cdk_id
)
8854 innermost_code
= id_declarator
->kind
;
8856 switch (id_declarator
->kind
)
8859 if (id_declarator
->declarator
8860 && id_declarator
->declarator
->kind
== cdk_id
)
8862 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8863 if (sfk
== sfk_destructor
)
8870 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8871 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8874 if (qualifying_scope
)
8876 if (at_function_scope_p ())
8880 A declarator-id shall not be qualified except
8883 None of the cases are permitted in block
8885 if (qualifying_scope
== global_namespace
)
8886 error ("invalid use of qualified-name %<::%D%>",
8888 else if (TYPE_P (qualifying_scope
))
8889 error ("invalid use of qualified-name %<%T::%D%>",
8890 qualifying_scope
, decl
);
8892 error ("invalid use of qualified-name %<%D::%D%>",
8893 qualifying_scope
, decl
);
8894 return error_mark_node
;
8896 else if (TYPE_P (qualifying_scope
))
8898 ctype
= qualifying_scope
;
8899 if (!MAYBE_CLASS_TYPE_P (ctype
))
8901 error ("%q#T is not a class or a namespace", ctype
);
8904 else if (innermost_code
!= cdk_function
8905 && current_class_type
8906 && !uniquely_derived_from_p (ctype
,
8907 current_class_type
))
8909 error ("invalid use of qualified-name %<%T::%D%>",
8910 qualifying_scope
, decl
);
8911 return error_mark_node
;
8914 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8915 in_namespace
= qualifying_scope
;
8917 switch (TREE_CODE (decl
))
8923 if (innermost_code
!= cdk_function
)
8925 error ("declaration of %qD as non-function", decl
);
8926 return error_mark_node
;
8928 else if (!qualifying_scope
8929 && !(current_class_type
&& at_class_scope_p ()))
8931 error ("declaration of %qD as non-member", decl
);
8932 return error_mark_node
;
8935 type
= TREE_OPERAND (decl
, 0);
8937 type
= constructor_name (type
);
8938 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8943 case TEMPLATE_ID_EXPR
:
8945 tree fns
= TREE_OPERAND (decl
, 0);
8948 if (!identifier_p (dname
))
8950 gcc_assert (is_overloaded_fn (dname
));
8951 dname
= DECL_NAME (get_first_fn (dname
));
8956 case IDENTIFIER_NODE
:
8957 if (identifier_p (decl
))
8960 if (C_IS_RESERVED_WORD (dname
))
8962 error ("declarator-id missing; using reserved word %qD",
8964 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8966 else if (!IDENTIFIER_TYPENAME_P (dname
))
8967 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8970 gcc_assert (flags
== NO_SPECIAL
);
8971 flags
= TYPENAME_FLAG
;
8972 ctor_return_type
= TREE_TYPE (dname
);
8973 sfk
= sfk_conversion
;
8974 if (is_typename_at_global_scope (dname
))
8975 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8977 name
= "<invalid operator>";
8994 return error_mark_node
;
8999 if (id_declarator
->kind
== cdk_id
)
9005 The declarator in a function-definition shall have the form
9006 D1 ( parameter-declaration-clause) ... */
9007 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9009 error ("function definition does not declare parameters");
9010 return error_mark_node
;
9013 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
9014 && innermost_code
!= cdk_function
9015 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9017 error ("declaration of %qD as non-function", dname
);
9018 return error_mark_node
;
9022 && identifier_p (dname
)
9023 && UDLIT_OPER_P (dname
)
9024 && innermost_code
!= cdk_function
)
9026 error ("declaration of %qD as non-function", dname
);
9027 return error_mark_node
;
9030 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9034 error ("declaration of %qD as %<typedef%>", dname
);
9035 return error_mark_node
;
9037 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9039 error ("declaration of %qD as parameter", dname
);
9040 return error_mark_node
;
9044 /* Anything declared one level down from the top level
9045 must be one of the parameters of a function
9046 (because the body is at least two levels down). */
9048 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9049 by not allowing C++ class definitions to specify their parameters
9050 with xdecls (must be spec.d in the parmlist).
9052 Since we now wait to push a class scope until we are sure that
9053 we are in a legitimate method context, we must set oldcname
9054 explicitly (since current_class_name is not yet alive).
9056 We also want to avoid calling this a PARM if it is in a namespace. */
9058 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9060 cp_binding_level
*b
= current_binding_level
;
9061 current_binding_level
= b
->level_chain
;
9062 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9063 decl_context
= PARM
;
9064 current_binding_level
= b
;
9068 name
= decl_context
== PARM
? "parameter" : "type name";
9070 if (constexpr_p
&& typedef_p
)
9072 error ("%<constexpr%> cannot appear in a typedef declaration");
9073 return error_mark_node
;
9076 /* If there were multiple types specified in the decl-specifier-seq,
9077 issue an error message. */
9078 if (declspecs
->multiple_types_p
)
9080 error ("two or more data types in declaration of %qs", name
);
9081 return error_mark_node
;
9084 if (declspecs
->conflicting_specifiers_p
)
9086 error ("conflicting specifiers in declaration of %qs", name
);
9087 return error_mark_node
;
9090 /* Extract the basic type from the decl-specifier-seq. */
9091 type
= declspecs
->type
;
9092 if (type
== error_mark_node
)
9095 type_was_error_mark_node
= true;
9097 /* If the entire declaration is itself tagged as deprecated then
9098 suppress reports of deprecated items. */
9099 if (type
&& TREE_DEPRECATED (type
)
9100 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9101 warn_deprecated_use (type
, NULL_TREE
);
9102 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9104 typedef_decl
= type
;
9105 type
= TREE_TYPE (typedef_decl
);
9106 if (TREE_DEPRECATED (type
)
9107 && DECL_ARTIFICIAL (typedef_decl
)
9108 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9109 warn_deprecated_use (type
, NULL_TREE
);
9111 /* No type at all: default to `int', and set DEFAULTED_INT
9112 because it was not a user-defined typedef. */
9113 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9115 /* These imply 'int'. */
9116 type
= integer_type_node
;
9120 explicit_int
= declspecs
->explicit_int_p
;
9121 explicit_char
= declspecs
->explicit_char_p
;
9124 /* See the code below that used this. */
9126 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9128 typedef_type
= type
;
9131 if (sfk
!= sfk_conversion
)
9132 ctor_return_type
= ctype
;
9134 if (sfk
!= sfk_none
)
9135 type
= check_special_function_return_type (sfk
, type
,
9137 else if (type
== NULL_TREE
)
9143 /* We handle `main' specially here, because 'main () { }' is so
9144 common. With no options, it is allowed. With -Wreturn-type,
9145 it is a warning. It is only an error with -pedantic-errors. */
9146 is_main
= (funcdef_flag
9147 && dname
&& identifier_p (dname
)
9148 && MAIN_NAME_P (dname
)
9149 && ctype
== NULL_TREE
9150 && in_namespace
== NULL_TREE
9151 && current_namespace
== global_namespace
);
9153 if (type_was_error_mark_node
)
9154 /* We've already issued an error, don't complain more. */;
9155 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9156 /* Allow it, sigh. */;
9158 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9160 pedwarn (input_location
, OPT_Wpedantic
,
9161 "ISO C++ forbids declaration of %qs with no type", name
);
9163 warning (OPT_Wreturn_type
,
9164 "ISO C++ forbids declaration of %qs with no type", name
);
9166 type
= integer_type_node
;
9171 if (explicit_int128
)
9173 if (int128_integer_type_node
== NULL_TREE
)
9175 error ("%<__int128%> is not supported by this target");
9176 explicit_int128
= false;
9178 else if (pedantic
&& ! in_system_header_at (input_location
))
9179 pedwarn (input_location
, OPT_Wpedantic
,
9180 "ISO C++ does not support %<__int128%> for %qs", name
);
9183 /* Now process the modifiers that were specified
9184 and check for invalid combinations. */
9186 /* Long double is a special combination. */
9187 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9190 type
= cp_build_qualified_type (long_double_type_node
,
9191 cp_type_quals (type
));
9194 /* Check all other uses of type modifiers. */
9196 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9200 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9201 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9202 else if (signed_p
&& unsigned_p
)
9203 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9204 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9205 error ("%<long long%> invalid for %qs", name
);
9206 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9207 error ("%<long%> invalid for %qs", name
);
9208 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9209 error ("%<short%> invalid for %qs", name
);
9210 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9211 error ("%<long%> or %<short%> invalid for %qs", name
);
9212 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9213 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9214 else if ((long_p
|| short_p
) && explicit_char
)
9215 error ("%<long%> or %<short%> specified with char for %qs", name
);
9216 else if (long_p
&& short_p
)
9217 error ("%<long%> and %<short%> specified together for %qs", name
);
9218 else if (type
== char16_type_node
|| type
== char32_type_node
)
9220 if (signed_p
|| unsigned_p
)
9221 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9222 else if (short_p
|| long_p
)
9223 error ("%<short%> or %<long%> invalid for %qs", name
);
9228 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9230 pedwarn (input_location
, OPT_Wpedantic
,
9231 "long, short, signed or unsigned used invalidly for %qs",
9233 if (flag_pedantic_errors
)
9238 /* Discard the type modifiers if they are invalid. */
9249 /* Decide whether an integer type is signed or not.
9250 Optionally treat bitfields as signed by default. */
9254 It is implementation-defined whether a plain (neither
9255 explicitly signed or unsigned) char, short, int, or long
9256 bit-field is signed or unsigned.
9258 Naturally, we extend this to long long as well. Note that
9259 this does not include wchar_t. */
9260 || (bitfield
&& !flag_signed_bitfields
9262 /* A typedef for plain `int' without `signed' can be
9263 controlled just like plain `int', but a typedef for
9264 `signed int' cannot be so controlled. */
9266 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9267 && TREE_CODE (type
) == INTEGER_TYPE
9268 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9270 if (explicit_int128
)
9271 type
= int128_unsigned_type_node
;
9273 type
= long_long_unsigned_type_node
;
9275 type
= long_unsigned_type_node
;
9277 type
= short_unsigned_type_node
;
9278 else if (type
== char_type_node
)
9279 type
= unsigned_char_type_node
;
9280 else if (typedef_decl
)
9281 type
= unsigned_type_for (type
);
9283 type
= unsigned_type_node
;
9285 else if (signed_p
&& type
== char_type_node
)
9286 type
= signed_char_type_node
;
9287 else if (explicit_int128
)
9288 type
= int128_integer_type_node
;
9290 type
= long_long_integer_type_node
;
9292 type
= long_integer_type_node
;
9294 type
= short_integer_type_node
;
9296 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9298 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9299 error ("complex invalid for %qs", name
);
9300 /* If we just have "complex", it is equivalent to
9301 "complex double", but if any modifiers at all are specified it is
9302 the complex form of TYPE. E.g, "complex short" is
9303 "complex short int". */
9304 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9305 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9306 type
= complex_double_type_node
;
9307 else if (type
== integer_type_node
)
9308 type
= complex_integer_type_node
;
9309 else if (type
== float_type_node
)
9310 type
= complex_float_type_node
;
9311 else if (type
== double_type_node
)
9312 type
= complex_double_type_node
;
9313 else if (type
== long_double_type_node
)
9314 type
= complex_long_double_type_node
;
9316 type
= build_complex_type (type
);
9319 type_quals
= TYPE_UNQUALIFIED
;
9320 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9321 type_quals
|= TYPE_QUAL_CONST
;
9322 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9323 type_quals
|= TYPE_QUAL_VOLATILE
;
9324 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9325 type_quals
|= TYPE_QUAL_RESTRICT
;
9326 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9327 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9330 /* If we're using the injected-class-name to form a compound type or a
9331 declaration, replace it with the underlying class so we don't get
9332 redundant typedefs in the debug output. But if we are returning the
9333 type unchanged, leave it alone so that it's available to
9334 maybe_get_template_decl_from_type_decl. */
9335 if (CLASS_TYPE_P (type
)
9336 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9337 && type
== TREE_TYPE (TYPE_NAME (type
))
9338 && (declarator
|| type_quals
))
9339 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9341 type_quals
|= cp_type_quals (type
);
9342 type
= cp_build_qualified_type_real
9343 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9344 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9345 /* We might have ignored or rejected some of the qualifiers. */
9346 type_quals
= cp_type_quals (type
);
9349 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9350 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9351 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9353 storage_class
= declspecs
->storage_class
;
9354 if (storage_class
== sc_static
)
9355 staticp
= 1 + (decl_context
== FIELD
);
9357 if (virtualp
&& staticp
== 2)
9359 error ("member %qD cannot be declared both virtual and static", dname
);
9360 storage_class
= sc_none
;
9363 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9365 /* Issue errors about use of storage classes for parameters. */
9366 if (decl_context
== PARM
)
9370 error ("typedef declaration invalid in parameter declaration");
9371 return error_mark_node
;
9373 else if (template_parm_flag
&& storage_class
!= sc_none
)
9375 error ("storage class specified for template parameter %qs", name
);
9376 return error_mark_node
;
9378 else if (storage_class
== sc_static
9379 || storage_class
== sc_extern
9381 error ("storage class specifiers invalid in parameter declarations");
9383 /* Function parameters cannot be constexpr. If we saw one, moan
9384 and pretend it wasn't there. */
9387 error ("a parameter cannot be declared %<constexpr%>");
9392 /* Give error if `virtual' is used outside of class declaration. */
9394 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9396 error ("%<virtual%> outside class declaration");
9400 /* Static anonymous unions are dealt with here. */
9401 if (staticp
&& decl_context
== TYPENAME
9403 && ANON_AGGR_TYPE_P (declspecs
->type
))
9404 decl_context
= FIELD
;
9406 /* Warn about storage classes that are invalid for certain
9407 kinds of declarations (parameters, typenames, etc.). */
9410 && storage_class
!= sc_extern
9411 && storage_class
!= sc_static
)
9414 error ("multiple storage classes in declaration of %qs", name
);
9417 if (decl_context
!= NORMAL
9418 && ((storage_class
!= sc_none
9419 && storage_class
!= sc_mutable
)
9422 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9423 && (storage_class
== sc_register
9424 || storage_class
== sc_auto
))
9428 else if (decl_context
== FIELD
9429 /* C++ allows static class elements. */
9430 && storage_class
== sc_static
)
9431 /* C++ also allows inlines and signed and unsigned elements,
9432 but in those cases we don't come in here. */
9436 if (decl_context
== FIELD
)
9437 error ("storage class specified for %qs", name
);
9440 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9441 error ("storage class specified for parameter %qs", name
);
9443 error ("storage class specified for typename");
9445 if (storage_class
== sc_register
9446 || storage_class
== sc_auto
9447 || storage_class
== sc_extern
9449 storage_class
= sc_none
;
9452 else if (storage_class
== sc_extern
&& funcdef_flag
9453 && ! toplevel_bindings_p ())
9454 error ("nested function %qs declared %<extern%>", name
);
9455 else if (toplevel_bindings_p ())
9457 if (storage_class
== sc_auto
)
9458 error ("top-level declaration of %qs specifies %<auto%>", name
);
9461 && storage_class
!= sc_extern
9462 && storage_class
!= sc_static
)
9464 if (declspecs
->gnu_thread_keyword_p
)
9465 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9466 "declared %<__thread%>", name
);
9468 /* When thread_local is applied to a variable of block scope the
9469 storage-class-specifier static is implied if it does not appear
9471 storage_class
= declspecs
->storage_class
= sc_static
;
9475 if (storage_class
&& friendp
)
9477 error ("storage class specifiers invalid in friend function declarations");
9478 storage_class
= sc_none
;
9483 unqualified_id
= NULL_TREE
;
9486 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9487 switch (TREE_CODE (unqualified_id
))
9490 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9491 if (TYPE_P (unqualified_id
))
9492 unqualified_id
= constructor_name (unqualified_id
);
9495 case IDENTIFIER_NODE
:
9496 case TEMPLATE_ID_EXPR
:
9504 if (declspecs
->std_attributes
)
9506 /* Apply the c++11 attributes to the type preceding them. */
9507 input_location
= declspecs
->locations
[ds_std_attribute
];
9508 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9509 input_location
= saved_loc
;
9512 /* Determine the type of the entity declared by recurring on the
9514 for (; declarator
; declarator
= declarator
->declarator
)
9516 const cp_declarator
*inner_declarator
;
9519 if (type
== error_mark_node
)
9520 return error_mark_node
;
9522 attrs
= declarator
->attributes
;
9528 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9529 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9530 if (declarator
->kind
== cdk_function
)
9531 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9532 if (declarator
->kind
== cdk_array
)
9533 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9534 returned_attrs
= decl_attributes (&type
,
9535 chainon (returned_attrs
, attrs
),
9539 if (declarator
->kind
== cdk_id
)
9542 inner_declarator
= declarator
->declarator
;
9544 switch (declarator
->kind
)
9547 type
= create_array_type_for_decl (dname
, type
,
9548 declarator
->u
.array
.bounds
);
9549 if (declarator
->std_attributes
)
9552 The optional attribute-specifier-seq appertains to the
9554 returned_attrs
= chainon (returned_attrs
,
9555 declarator
->std_attributes
);
9563 /* Declaring a function type.
9564 Make sure we have a valid type for the function to return. */
9566 if (type_quals
!= TYPE_UNQUALIFIED
)
9568 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9569 warning (OPT_Wignored_qualifiers
,
9570 "type qualifiers ignored on function return type");
9571 /* We now know that the TYPE_QUALS don't apply to the
9572 decl, but to its return type. */
9573 type_quals
= TYPE_UNQUALIFIED
;
9575 errmsg
= targetm
.invalid_return_type (type
);
9579 type
= integer_type_node
;
9582 /* Error about some types functions can't return. */
9584 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9586 error ("%qs declared as function returning a function", name
);
9587 return error_mark_node
;
9589 if (TREE_CODE (type
) == ARRAY_TYPE
)
9591 error ("%qs declared as function returning an array", name
);
9592 return error_mark_node
;
9595 input_location
= declspecs
->locations
[ds_type_spec
];
9596 abstract_virtuals_error (ACU_RETURN
, type
);
9597 input_location
= saved_loc
;
9599 /* Pick up type qualifiers which should be applied to `this'. */
9600 memfn_quals
= declarator
->u
.function
.qualifiers
;
9601 /* Pick up virt-specifiers. */
9602 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9603 /* And ref-qualifier, too */
9604 rqual
= declarator
->u
.function
.ref_qualifier
;
9605 /* Pick up the exception specifications. */
9606 raises
= declarator
->u
.function
.exception_specification
;
9607 /* If the exception-specification is ill-formed, let's pretend
9608 there wasn't one. */
9609 if (raises
== error_mark_node
)
9612 /* Say it's a definition only for the CALL_EXPR
9613 closest to the identifier. */
9614 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9616 /* Handle a late-specified return type. */
9619 if (type_uses_auto (type
))
9621 if (!declarator
->u
.function
.late_return_type
)
9623 if (current_class_type
9624 && LAMBDA_TYPE_P (current_class_type
))
9625 /* OK for C++11 lambdas. */;
9626 else if (cxx_dialect
< cxx1y
)
9628 error ("%qs function uses "
9629 "%<auto%> type specifier without trailing "
9630 "return type", name
);
9631 inform (input_location
, "deduced return type "
9632 "only available with -std=c++1y or "
9636 error ("virtual function cannot "
9637 "have deduced return type");
9639 else if (!is_auto (type
))
9641 error ("%qs function with trailing return type has"
9642 " %qT as its type rather than plain %<auto%>",
9644 return error_mark_node
;
9647 else if (declarator
->u
.function
.late_return_type
)
9649 if (cxx_dialect
< cxx11
)
9650 /* Not using maybe_warn_cpp0x because this should
9651 always be an error. */
9652 error ("trailing return type only available with "
9653 "-std=c++11 or -std=gnu++11");
9655 error ("%qs function with trailing return type not "
9656 "declared with %<auto%> type specifier", name
);
9657 return error_mark_node
;
9660 type
= splice_late_return_type
9661 (type
, declarator
->u
.function
.late_return_type
);
9662 if (type
== error_mark_node
)
9663 return error_mark_node
;
9665 if (declarator
->u
.function
.late_return_type
)
9666 late_return_type_p
= true;
9668 if (ctype
== NULL_TREE
9669 && decl_context
== FIELD
9671 && (friendp
== 0 || dname
== current_class_name
))
9672 ctype
= current_class_type
;
9674 if (ctype
&& (sfk
== sfk_constructor
9675 || sfk
== sfk_destructor
))
9677 /* We are within a class's scope. If our declarator name
9678 is the same as the class name, and we are defining
9679 a function, then it is a constructor/destructor, and
9680 therefore returns a void type. */
9682 /* ISO C++ 12.4/2. A destructor may not be declared
9683 const or volatile. A destructor may not be static.
9684 A destructor may not be declared with ref-qualifier.
9686 ISO C++ 12.1. A constructor may not be declared
9687 const or volatile. A constructor may not be
9688 virtual. A constructor may not be static.
9689 A constructor may not be declared with ref-qualifier. */
9691 error ((flags
== DTOR_FLAG
)
9692 ? G_("destructor cannot be static member function")
9693 : G_("constructor cannot be static member function"));
9696 error ((flags
== DTOR_FLAG
)
9697 ? G_("destructors may not be cv-qualified")
9698 : G_("constructors may not be cv-qualified"));
9699 memfn_quals
= TYPE_UNQUALIFIED
;
9704 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9705 error ((flags
== DTOR_FLAG
)
9706 ? "destructors may not be ref-qualified"
9707 : "constructors may not be ref-qualified");
9708 rqual
= REF_QUAL_NONE
;
9711 if (decl_context
== FIELD
9712 && !member_function_or_else (ctype
,
9715 return error_mark_node
;
9717 if (flags
!= DTOR_FLAG
)
9719 /* It's a constructor. */
9724 permerror (input_location
, "constructors cannot be declared virtual");
9727 if (decl_context
== FIELD
9728 && sfk
!= sfk_constructor
)
9729 return error_mark_node
;
9731 if (decl_context
== FIELD
)
9737 error ("can%'t initialize friend function %qs", name
);
9740 /* Cannot be both friend and virtual. */
9741 error ("virtual functions cannot be friends");
9744 if (decl_context
== NORMAL
)
9745 error ("friend declaration not in class definition");
9746 if (current_function_decl
&& funcdef_flag
)
9747 error ("can%'t define friend function %qs in a local "
9751 else if (ctype
&& sfk
== sfk_conversion
)
9755 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9760 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9763 if (inner_declarator
9764 && inner_declarator
->kind
== cdk_id
9765 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9766 && arg_types
!= void_list_node
)
9768 error ("destructors may not have parameters");
9769 arg_types
= void_list_node
;
9773 type
= build_function_type (type
, arg_types
);
9774 if (declarator
->std_attributes
)
9777 The optional attribute-specifier-seq appertains to
9778 the function type. */
9779 decl_attributes (&type
, declarator
->std_attributes
,
9787 /* Filter out pointers-to-references and references-to-references.
9788 We can get these if a TYPE_DECL is used. */
9790 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9792 if (declarator
->kind
!= cdk_reference
)
9794 error ("cannot declare pointer to %q#T", type
);
9795 type
= TREE_TYPE (type
);
9798 /* In C++0x, we allow reference to reference declarations
9799 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9800 and template type arguments [14.3.1/4 temp.arg.type]. The
9801 check for direct reference to reference declarations, which
9802 are still forbidden, occurs below. Reasoning behind the change
9803 can be found in DR106, DR540, and the rvalue reference
9805 else if (cxx_dialect
== cxx98
)
9807 error ("cannot declare reference to %q#T", type
);
9808 type
= TREE_TYPE (type
);
9811 else if (VOID_TYPE_P (type
))
9813 if (declarator
->kind
== cdk_reference
)
9814 error ("cannot declare reference to %q#T", type
);
9815 else if (declarator
->kind
== cdk_ptrmem
)
9816 error ("cannot declare pointer to %q#T member", type
);
9819 /* We now know that the TYPE_QUALS don't apply to the decl,
9820 but to the target of the pointer. */
9821 type_quals
= TYPE_UNQUALIFIED
;
9823 /* This code used to handle METHOD_TYPE, but I don't think it's
9824 possible to get it here anymore. */
9825 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9826 if (declarator
->kind
== cdk_ptrmem
9827 && TREE_CODE (type
) == FUNCTION_TYPE
)
9829 memfn_quals
|= type_memfn_quals (type
);
9830 type
= build_memfn_type (type
,
9831 declarator
->u
.pointer
.class_type
,
9834 if (type
== error_mark_node
)
9835 return error_mark_node
;
9837 rqual
= REF_QUAL_NONE
;
9838 memfn_quals
= TYPE_UNQUALIFIED
;
9841 if (TREE_CODE (type
) == FUNCTION_TYPE
9842 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9843 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9844 error (declarator
->kind
== cdk_reference
9845 ? G_("cannot declare reference to qualified function type %qT")
9846 : G_("cannot declare pointer to qualified function type %qT"),
9849 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
9850 && (flag_iso
|| warn_vla
> 0))
9851 pedwarn (input_location
, OPT_Wvla
,
9852 declarator
->kind
== cdk_reference
9853 ? G_("reference to array of runtime bound")
9854 : G_("pointer to array of runtime bound"));
9856 /* When the pointed-to type involves components of variable size,
9857 care must be taken to ensure that the size evaluation code is
9858 emitted early enough to dominate all the possible later uses
9859 and late enough for the variables on which it depends to have
9862 This is expected to happen automatically when the pointed-to
9863 type has a name/declaration of it's own, but special attention
9864 is required if the type is anonymous.
9866 We handle the NORMAL and FIELD contexts here by inserting a
9867 dummy statement that just evaluates the size at a safe point
9868 and ensures it is not deferred until e.g. within a deeper
9869 conditional context (c++/43555).
9871 We expect nothing to be needed here for PARM or TYPENAME.
9872 Evaluating the size at this point for TYPENAME would
9873 actually be incorrect, as we might be in the middle of an
9874 expression with side effects on the pointed-to type size
9875 "arguments" prior to the pointer declaration point and the
9876 size evaluation could end up prior to the side effects. */
9878 if (!TYPE_NAME (type
)
9879 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9880 && at_function_scope_p ()
9881 && variably_modified_type_p (type
, NULL_TREE
))
9882 /* Force evaluation of the SAVE_EXPR. */
9883 finish_expr_stmt (TYPE_SIZE (type
));
9885 if (declarator
->kind
== cdk_reference
)
9887 /* In C++0x, the type we are creating a reference to might be
9888 a typedef which is itself a reference type. In that case,
9889 we follow the reference collapsing rules in
9890 [7.1.3/8 dcl.typedef] to create the final reference type:
9892 "If a typedef TD names a type that is a reference to a type
9893 T, an attempt to create the type 'lvalue reference to cv TD'
9894 creates the type 'lvalue reference to T,' while an attempt
9895 to create the type "rvalue reference to cv TD' creates the
9898 if (VOID_TYPE_P (type
))
9899 /* We already gave an error. */;
9900 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9902 if (declarator
->u
.reference
.rvalue_ref
)
9903 /* Leave type alone. */;
9905 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9908 type
= cp_build_reference_type
9909 (type
, declarator
->u
.reference
.rvalue_ref
);
9911 /* In C++0x, we need this check for direct reference to
9912 reference declarations, which are forbidden by
9913 [8.3.2/5 dcl.ref]. Reference to reference declarations
9914 are only allowed indirectly through typedefs and template
9915 type arguments. Example:
9917 void foo(int & &); // invalid ref-to-ref decl
9919 typedef int & int_ref;
9920 void foo(int_ref &); // valid ref-to-ref decl
9922 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9923 error ("cannot declare reference to %q#T, which is not "
9924 "a typedef or a template type argument", type
);
9926 else if (TREE_CODE (type
) == METHOD_TYPE
)
9927 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9928 else if (declarator
->kind
== cdk_ptrmem
)
9930 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9932 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9933 /* We will already have complained. */
9934 type
= error_mark_node
;
9936 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9940 type
= build_pointer_type (type
);
9942 /* Process a list of type modifier keywords (such as
9943 const or volatile) that were given inside the `*' or `&'. */
9945 if (declarator
->u
.pointer
.qualifiers
)
9948 = cp_build_qualified_type (type
,
9949 declarator
->u
.pointer
.qualifiers
);
9950 type_quals
= cp_type_quals (type
);
9953 /* Apply C++11 attributes to the pointer, and not to the
9954 type pointed to. This is unlike what is done for GNU
9955 attributes above. It is to comply with [dcl.ptr]/1:
9957 [the optional attribute-specifier-seq (7.6.1) appertains
9958 to the pointer and not to the object pointed to]. */
9959 if (declarator
->std_attributes
)
9960 decl_attributes (&type
, declarator
->std_attributes
,
9974 /* A `constexpr' specifier used in an object declaration declares
9975 the object as `const'. */
9976 if (constexpr_p
&& innermost_code
!= cdk_function
)
9978 if (type_quals
& TYPE_QUAL_VOLATILE
)
9979 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9980 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9982 type_quals
|= TYPE_QUAL_CONST
;
9983 type
= cp_build_qualified_type (type
, type_quals
);
9987 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9988 && TREE_CODE (type
) != FUNCTION_TYPE
9989 && TREE_CODE (type
) != METHOD_TYPE
)
9991 error ("template-id %qD used as a declarator",
9993 unqualified_id
= dname
;
9996 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9997 qualified with a class-name, turn it into a METHOD_TYPE, unless
9998 we know that the function is static. We take advantage of this
9999 opportunity to do other processing that pertains to entities
10000 explicitly declared to be class members. Note that if DECLARATOR
10001 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10002 would not have exited the loop above. */
10004 && declarator
->u
.id
.qualifying_scope
10005 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10007 ctype
= declarator
->u
.id
.qualifying_scope
;
10008 ctype
= TYPE_MAIN_VARIANT (ctype
);
10009 template_count
= num_template_headers_for_class (ctype
);
10011 if (ctype
== current_class_type
)
10015 permerror (input_location
, "member functions are implicitly friends of their class");
10019 permerror (declarator
->id_loc
,
10020 "extra qualification %<%T::%> on member %qs",
10023 else if (/* If the qualifying type is already complete, then we
10024 can skip the following checks. */
10025 !COMPLETE_TYPE_P (ctype
)
10026 && (/* If the function is being defined, then
10027 qualifying type must certainly be complete. */
10029 /* A friend declaration of "T::f" is OK, even if
10030 "T" is a template parameter. But, if this
10031 function is not a friend, the qualifying type
10032 must be a class. */
10033 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10034 /* For a declaration, the type need not be
10035 complete, if either it is dependent (since there
10036 is no meaningful definition of complete in that
10037 case) or the qualifying class is currently being
10039 || !(dependent_type_p (ctype
)
10040 || currently_open_class (ctype
)))
10041 /* Check that the qualifying type is complete. */
10042 && !complete_type_or_else (ctype
, NULL_TREE
))
10043 return error_mark_node
;
10044 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10046 if (current_class_type
10047 && (!friendp
|| funcdef_flag
))
10049 error (funcdef_flag
10050 ? G_("cannot define member function %<%T::%s%> "
10052 : G_("cannot declare member function %<%T::%s%> "
10054 ctype
, name
, current_class_type
);
10055 return error_mark_node
;
10058 else if (typedef_p
&& current_class_type
)
10060 error ("cannot declare member %<%T::%s%> within %qT",
10061 ctype
, name
, current_class_type
);
10062 return error_mark_node
;
10066 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10067 ctype
= current_class_type
;
10069 /* Now TYPE has the actual type. */
10071 if (returned_attrs
)
10074 *attrlist
= chainon (returned_attrs
, *attrlist
);
10076 attrlist
= &returned_attrs
;
10080 && declarator
->kind
== cdk_id
10081 && declarator
->std_attributes
)
10082 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10083 a declarator-id appertains to the entity that is declared. */
10084 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10086 /* Handle parameter packs. */
10087 if (parameter_pack_p
)
10089 if (decl_context
== PARM
)
10090 /* Turn the type into a pack expansion.*/
10091 type
= make_pack_expansion (type
);
10093 error ("non-parameter %qs cannot be a parameter pack", name
);
10096 /* Did array size calculations overflow or does the array cover more
10097 than half of the address-space? */
10098 if (TREE_CODE (type
) == ARRAY_TYPE
10099 && COMPLETE_TYPE_P (type
)
10100 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10101 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10103 error ("size of array %qs is too large", name
);
10104 /* If we proceed with the array type as it is, we'll eventually
10105 crash in tree_to_[su]hwi(). */
10106 type
= error_mark_node
;
10109 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10110 && !processing_template_decl
10111 && variably_modified_type_p (type
, NULL_TREE
))
10113 if (decl_context
== FIELD
)
10114 error ("data member may not have variably modified type %qT", type
);
10116 error ("parameter may not have variably modified type %qT", type
);
10117 type
= error_mark_node
;
10120 if (explicitp
== 1 || (explicitp
&& friendp
))
10122 /* [dcl.fct.spec] The explicit specifier shall only be used in
10123 declarations of constructors within a class definition. */
10124 error ("only declarations of constructors can be %<explicit%>");
10128 if (storage_class
== sc_mutable
)
10130 if (decl_context
!= FIELD
|| friendp
)
10132 error ("non-member %qs cannot be declared %<mutable%>", name
);
10133 storage_class
= sc_none
;
10135 else if (decl_context
== TYPENAME
|| typedef_p
)
10137 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10138 storage_class
= sc_none
;
10140 else if (TREE_CODE (type
) == FUNCTION_TYPE
10141 || TREE_CODE (type
) == METHOD_TYPE
)
10143 error ("function %qs cannot be declared %<mutable%>", name
);
10144 storage_class
= sc_none
;
10148 error ("static %qs cannot be declared %<mutable%>", name
);
10149 storage_class
= sc_none
;
10151 else if (type_quals
& TYPE_QUAL_CONST
)
10153 error ("const %qs cannot be declared %<mutable%>", name
);
10154 storage_class
= sc_none
;
10156 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10158 permerror (input_location
, "reference %qs cannot be declared "
10159 "%<mutable%>", name
);
10160 storage_class
= sc_none
;
10164 /* If this is declaring a typedef name, return a TYPE_DECL. */
10165 if (typedef_p
&& decl_context
!= TYPENAME
)
10169 /* Note that the grammar rejects storage classes
10170 in typenames, fields or parameters. */
10171 if (current_lang_name
== lang_name_java
)
10172 TYPE_FOR_JAVA (type
) = 1;
10174 /* This declaration:
10176 typedef void f(int) const;
10178 declares a function type which is not a member of any
10179 particular class, but which is cv-qualified; for
10180 example "f S::*" declares a pointer to a const-qualified
10181 member function of S. We record the cv-qualification in the
10183 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10185 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10187 /* We have now dealt with these qualifiers. */
10188 memfn_quals
= TYPE_UNQUALIFIED
;
10189 rqual
= REF_QUAL_NONE
;
10192 if (type_uses_auto (type
))
10194 error ("typedef declared %<auto%>");
10195 type
= error_mark_node
;
10198 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
10199 && (flag_iso
|| warn_vla
> 0))
10200 pedwarn (input_location
, OPT_Wvla
,
10201 "typedef naming array of runtime bound");
10203 if (decl_context
== FIELD
)
10204 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10206 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10207 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10208 error_at (DECL_SOURCE_LOCATION (decl
),
10209 "typedef name may not be a nested-name-specifier");
10210 TREE_TYPE (decl
) = error_mark_node
;
10213 if (decl_context
!= FIELD
)
10215 if (!current_function_decl
)
10216 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10217 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10218 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10219 (current_function_decl
)))
10220 /* The TYPE_DECL is "abstract" because there will be
10221 clones of this constructor/destructor, and there will
10222 be copies of this TYPE_DECL generated in those
10223 clones. The decloning optimization (for space) may
10224 revert this subsequently if it determines that
10225 the clones should share a common implementation. */
10226 DECL_ABSTRACT (decl
) = 1;
10228 else if (current_class_type
10229 && constructor_name_p (unqualified_id
, current_class_type
))
10230 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10231 "as enclosing class",
10234 /* If the user declares "typedef struct {...} foo" then the
10235 struct will have an anonymous name. Fill that name in now.
10236 Nothing can refer to it, so nothing needs know about the name
10238 if (type
!= error_mark_node
10240 && TYPE_NAME (type
)
10241 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10242 && TYPE_ANONYMOUS_P (type
)
10243 && declspecs
->type_definition_p
10244 && attributes_naming_typedef_ok (*attrlist
)
10245 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10249 /* Replace the anonymous name with the real name everywhere. */
10250 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10252 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10253 /* We do not rename the debug info representing the
10254 anonymous tagged type because the standard says in
10255 [dcl.typedef] that the naming applies only for
10256 linkage purposes. */
10257 /*debug_hooks->set_name (t, decl);*/
10258 TYPE_NAME (t
) = decl
;
10261 if (TYPE_LANG_SPECIFIC (type
))
10262 TYPE_WAS_ANONYMOUS (type
) = 1;
10264 /* If this is a typedef within a template class, the nested
10265 type is a (non-primary) template. The name for the
10266 template needs updating as well. */
10267 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10268 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10269 = TYPE_IDENTIFIER (type
);
10271 /* Adjust linkage now that we aren't anonymous anymore. */
10272 reset_type_linkage (type
);
10274 /* FIXME remangle member functions; member functions of a
10275 type with external linkage have external linkage. */
10279 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10280 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10282 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10283 memfn_quals
!= TYPE_UNQUALIFIED
,
10284 inlinep
, friendp
, raises
!= NULL_TREE
);
10286 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10287 /* Acknowledge that this was written:
10288 `using analias = atype;'. */
10289 TYPE_DECL_ALIAS_P (decl
) = 1;
10294 /* Detect the case of an array type of unspecified size
10295 which came, as such, direct from a typedef name.
10296 We must copy the type, so that the array's domain can be
10297 individually set by the object's initializer. */
10299 if (type
&& typedef_type
10300 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10301 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10302 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10304 /* Detect where we're using a typedef of function type to declare a
10305 function. PARMS will not be set, so we must create it now. */
10307 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10309 tree decls
= NULL_TREE
;
10312 for (args
= TYPE_ARG_TYPES (type
);
10313 args
&& args
!= void_list_node
;
10314 args
= TREE_CHAIN (args
))
10316 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10318 DECL_CHAIN (decl
) = decls
;
10322 parms
= nreverse (decls
);
10324 if (decl_context
!= TYPENAME
)
10326 /* The qualifiers on the function type become the qualifiers on
10327 the non-static member function. */
10328 memfn_quals
|= type_memfn_quals (type
);
10329 rqual
= type_memfn_rqual (type
);
10330 type_quals
= TYPE_UNQUALIFIED
;
10334 /* If this is a type name (such as, in a cast or sizeof),
10335 compute the type and return it now. */
10337 if (decl_context
== TYPENAME
)
10339 /* Note that the grammar rejects storage classes
10340 in typenames, fields or parameters. */
10341 if (type_quals
!= TYPE_UNQUALIFIED
)
10342 type_quals
= TYPE_UNQUALIFIED
;
10344 /* Special case: "friend class foo" looks like a TYPENAME context. */
10347 if (type_quals
!= TYPE_UNQUALIFIED
)
10349 error ("type qualifiers specified for friend class declaration");
10350 type_quals
= TYPE_UNQUALIFIED
;
10354 error ("%<inline%> specified for friend class declaration");
10360 /* Don't allow friend declaration without a class-key. */
10361 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10362 permerror (input_location
, "template parameters cannot be friends");
10363 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10364 permerror (input_location
, "friend declaration requires class-key, "
10365 "i.e. %<friend class %T::%D%>",
10366 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10368 permerror (input_location
, "friend declaration requires class-key, "
10369 "i.e. %<friend %#T%>",
10373 /* Only try to do this stuff if we didn't already give up. */
10374 if (type
!= integer_type_node
)
10376 /* A friendly class? */
10377 if (current_class_type
)
10378 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10379 /*complain=*/true);
10381 error ("trying to make class %qT a friend of global scope",
10384 type
= void_type_node
;
10387 else if (memfn_quals
|| rqual
)
10389 if (ctype
== NULL_TREE
10390 && TREE_CODE (type
) == METHOD_TYPE
)
10391 ctype
= TYPE_METHOD_BASETYPE (type
);
10394 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10395 /* Core issue #547: need to allow this in template type args.
10396 Allow it in general in C++11 for alias-declarations. */
10397 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10398 && TREE_CODE (type
) == FUNCTION_TYPE
)
10399 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10401 error ("invalid qualifiers on non-member function type");
10406 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10407 && decl_context
!= CATCHPARM
10408 && TREE_CODE (type
) != UNION_TYPE
10411 error ("abstract declarator %qT used as declaration", type
);
10412 return error_mark_node
;
10415 /* Only functions may be declared using an operator-function-id. */
10417 && IDENTIFIER_OPNAME_P (unqualified_id
)
10418 && TREE_CODE (type
) != FUNCTION_TYPE
10419 && TREE_CODE (type
) != METHOD_TYPE
)
10421 error ("declaration of %qD as non-function", unqualified_id
);
10422 return error_mark_node
;
10425 /* We don't check parameter types here because we can emit a better
10426 error message later. */
10427 if (decl_context
!= PARM
)
10429 type
= check_var_type (unqualified_id
, type
);
10430 if (type
== error_mark_node
)
10431 return error_mark_node
;
10434 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10435 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10437 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10439 if (ctype
|| in_namespace
)
10440 error ("cannot use %<::%> in parameter declaration");
10442 if (type_uses_auto (type
))
10444 if (cxx_dialect
>= cxx1y
)
10445 error ("%<auto%> parameter not permitted in this context");
10447 error ("parameter declared %<auto%>");
10448 type
= error_mark_node
;
10451 /* A parameter declared as an array of T is really a pointer to T.
10452 One declared as a function is really a pointer to a function.
10453 One declared as a member is really a pointer to member. */
10455 if (TREE_CODE (type
) == ARRAY_TYPE
)
10457 /* Transfer const-ness of array into that of type pointed to. */
10458 type
= build_pointer_type (TREE_TYPE (type
));
10459 type_quals
= TYPE_UNQUALIFIED
;
10461 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10462 type
= build_pointer_type (type
);
10465 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10466 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10468 cp_cv_quals real_quals
= memfn_quals
;
10469 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10470 real_quals
|= TYPE_QUAL_CONST
;
10471 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10477 if (decl_context
== PARM
)
10479 decl
= cp_build_parm_decl (unqualified_id
, type
);
10481 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10482 memfn_quals
!= TYPE_UNQUALIFIED
,
10483 inlinep
, friendp
, raises
!= NULL_TREE
);
10485 else if (decl_context
== FIELD
)
10487 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10488 && type_uses_auto (type
))
10490 error ("non-static data member declared %<auto%>");
10491 type
= error_mark_node
;
10494 /* The C99 flexible array extension. */
10495 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10496 && TYPE_DOMAIN (type
) == NULL_TREE
)
10498 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10499 tf_warning_or_error
);
10500 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10503 if (type
== error_mark_node
)
10505 /* Happens when declaring arrays of sizes which
10506 are error_mark_node, for example. */
10509 else if (in_namespace
&& !friendp
)
10511 /* Something like struct S { int N::j; }; */
10512 error ("invalid use of %<::%>");
10513 return error_mark_node
;
10515 else if (TREE_CODE (type
) == FUNCTION_TYPE
10516 || TREE_CODE (type
) == METHOD_TYPE
)
10519 tree function_context
;
10523 /* This should never happen in pure C++ (the check
10524 could be an assert). It could happen in
10525 Objective-C++ if someone writes invalid code that
10526 uses a function declaration for an instance
10527 variable or property (instance variables and
10528 properties are parsed as FIELD_DECLs, but they are
10529 part of an Objective-C class, not a C++ class).
10530 That code is invalid and is caught by this
10534 error ("declaration of function %qD in invalid context",
10536 return error_mark_node
;
10539 /* ``A union may [ ... ] not [ have ] virtual functions.''
10541 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10543 error ("function %qD declared virtual inside a union",
10545 return error_mark_node
;
10548 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10552 error ("%qD cannot be declared virtual, since it "
10553 "is always static",
10560 /* Check that the name used for a destructor makes sense. */
10561 if (sfk
== sfk_destructor
)
10563 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10567 gcc_assert (friendp
);
10568 error ("expected qualified name in friend declaration "
10569 "for destructor %qD", uqname
);
10570 return error_mark_node
;
10573 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10575 error ("declaration of %qD as member of %qT",
10577 return error_mark_node
;
10581 error ("a destructor cannot be %<constexpr%>");
10582 return error_mark_node
;
10585 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10587 error ("expected qualified name in friend declaration "
10588 "for constructor %qD",
10589 id_declarator
->u
.id
.unqualified_name
);
10590 return error_mark_node
;
10593 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10594 function_context
= (ctype
!= NULL_TREE
) ?
10595 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10596 publicp
= (! friendp
|| ! staticp
)
10597 && function_context
== NULL_TREE
;
10599 if (late_return_type_p
)
10600 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10602 decl
= grokfndecl (ctype
, type
,
10603 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10604 ? unqualified_id
: dname
,
10607 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10608 friendp
? -1 : 0, friendp
, publicp
,
10609 inlinep
| (2 * constexpr_p
),
10611 funcdef_flag
, template_count
, in_namespace
,
10612 attrlist
, declarator
->id_loc
);
10613 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10614 if (decl
== NULL_TREE
)
10615 return error_mark_node
;
10617 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10618 /* The decl and setting of decl_attr is also turned off. */
10619 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10622 /* [class.conv.ctor]
10624 A constructor declared without the function-specifier
10625 explicit that can be called with a single parameter
10626 specifies a conversion from the type of its first
10627 parameter to the type of its class. Such a constructor
10628 is called a converting constructor. */
10629 if (explicitp
== 2)
10630 DECL_NONCONVERTING_P (decl
) = 1;
10632 else if (!staticp
&& !dependent_type_p (type
)
10633 && !COMPLETE_TYPE_P (complete_type (type
))
10634 && (TREE_CODE (type
) != ARRAY_TYPE
10635 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10636 || initialized
== 0))
10638 if (unqualified_id
)
10640 error ("field %qD has incomplete type %qT",
10641 unqualified_id
, type
);
10642 cxx_incomplete_type_inform (strip_array_types (type
));
10645 error ("name %qT has incomplete type", type
);
10647 type
= error_mark_node
;
10654 error ("%qE is neither function nor member function; "
10655 "cannot be declared friend", unqualified_id
);
10663 /* Friends are treated specially. */
10664 if (ctype
== current_class_type
)
10665 ; /* We already issued a permerror. */
10666 else if (decl
&& DECL_NAME (decl
))
10668 if (template_class_depth (current_class_type
) == 0)
10670 decl
= check_explicit_specialization
10671 (unqualified_id
, decl
, template_count
,
10672 2 * funcdef_flag
+ 4);
10673 if (decl
== error_mark_node
)
10674 return error_mark_node
;
10677 decl
= do_friend (ctype
, unqualified_id
, decl
,
10683 return error_mark_node
;
10686 /* Structure field. It may not be a function, except for C++. */
10688 if (decl
== NULL_TREE
)
10692 /* C++ allows static class members. All other work
10693 for this is done by grokfield. */
10694 decl
= build_lang_decl_loc (declarator
10695 ? declarator
->id_loc
10697 VAR_DECL
, unqualified_id
, type
);
10698 set_linkage_for_static_data_member (decl
);
10699 /* Even if there is an in-class initialization, DECL
10700 is considered undefined until an out-of-class
10701 definition is provided. */
10702 DECL_EXTERNAL (decl
) = 1;
10706 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10707 if (declspecs
->gnu_thread_keyword_p
)
10708 DECL_GNU_TLS_P (decl
) = true;
10711 if (constexpr_p
&& !initialized
)
10713 error ("constexpr static data member %qD must have an "
10714 "initializer", decl
);
10715 constexpr_p
= false;
10722 error ("non-static data member %qE declared %<constexpr%>",
10724 constexpr_p
= false;
10726 decl
= build_decl (input_location
,
10727 FIELD_DECL
, unqualified_id
, type
);
10728 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10729 if (bitfield
&& !unqualified_id
)
10730 TREE_NO_WARNING (decl
) = 1;
10732 if (storage_class
== sc_mutable
)
10734 DECL_MUTABLE_P (decl
) = 1;
10735 storage_class
= sc_none
;
10740 /* An attempt is being made to initialize a non-static
10741 member. This is new in C++11. */
10742 maybe_warn_cpp0x (CPP0X_NSDMI
);
10744 /* If this has been parsed with static storage class, but
10745 errors forced staticp to be cleared, ensure NSDMI is
10747 if (declspecs
->storage_class
== sc_static
)
10748 DECL_INITIAL (decl
) = error_mark_node
;
10752 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10753 memfn_quals
!= TYPE_UNQUALIFIED
,
10754 inlinep
, friendp
, raises
!= NULL_TREE
);
10757 else if (TREE_CODE (type
) == FUNCTION_TYPE
10758 || TREE_CODE (type
) == METHOD_TYPE
)
10760 tree original_name
;
10763 if (!unqualified_id
)
10764 return error_mark_node
;
10766 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10767 original_name
= dname
;
10769 original_name
= unqualified_id
;
10771 if (storage_class
== sc_auto
)
10772 error ("storage class %<auto%> invalid for function %qs", name
);
10773 else if (storage_class
== sc_register
)
10774 error ("storage class %<register%> invalid for function %qs", name
);
10777 if (declspecs
->gnu_thread_keyword_p
)
10778 error ("storage class %<__thread%> invalid for function %qs",
10781 error ("storage class %<thread_local%> invalid for function %qs",
10785 if (virt_specifiers
)
10786 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10787 /* Function declaration not at top level.
10788 Storage classes other than `extern' are not allowed
10789 and `extern' makes no difference. */
10790 if (! toplevel_bindings_p ()
10791 && (storage_class
== sc_static
10792 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10795 if (storage_class
== sc_static
)
10796 pedwarn (input_location
, OPT_Wpedantic
,
10797 "%<static%> specified invalid for function %qs "
10798 "declared out of global scope", name
);
10800 pedwarn (input_location
, OPT_Wpedantic
,
10801 "%<inline%> specifier invalid for function %qs "
10802 "declared out of global scope", name
);
10805 if (ctype
== NULL_TREE
)
10809 error ("virtual non-class function %qs", name
);
10812 else if (sfk
== sfk_constructor
10813 || sfk
== sfk_destructor
)
10815 error (funcdef_flag
10816 ? G_("%qs defined in a non-class scope")
10817 : G_("%qs declared in a non-class scope"), name
);
10822 /* Record whether the function is public. */
10823 publicp
= (ctype
!= NULL_TREE
10824 || storage_class
!= sc_static
);
10826 if (late_return_type_p
)
10827 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10829 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10830 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10832 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10834 template_count
, in_namespace
, attrlist
,
10835 declarator
->id_loc
);
10836 if (decl
== NULL_TREE
)
10837 return error_mark_node
;
10841 int invalid_static
= 0;
10843 /* Don't allow a static member function in a class, and forbid
10844 declaring main to be static. */
10845 if (TREE_CODE (type
) == METHOD_TYPE
)
10847 permerror (input_location
, "cannot declare member function %qD to have "
10848 "static linkage", decl
);
10849 invalid_static
= 1;
10851 else if (current_function_decl
)
10853 /* FIXME need arm citation */
10854 error ("cannot declare static function inside another function");
10855 invalid_static
= 1;
10858 if (invalid_static
)
10861 storage_class
= sc_none
;
10867 /* It's a variable. */
10869 /* An uninitialized decl with `extern' is a reference. */
10870 decl
= grokvardecl (type
, unqualified_id
,
10873 (type_quals
& TYPE_QUAL_CONST
) != 0,
10874 ctype
? ctype
: in_namespace
);
10875 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10876 memfn_quals
!= TYPE_UNQUALIFIED
,
10877 inlinep
, friendp
, raises
!= NULL_TREE
);
10881 DECL_CONTEXT (decl
) = ctype
;
10884 permerror (input_location
, "%<static%> may not be used when defining "
10885 "(as opposed to declaring) a static data member");
10887 storage_class
= sc_none
;
10889 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10891 error ("static member %qD declared %<register%>", decl
);
10892 storage_class
= sc_none
;
10894 if (storage_class
== sc_extern
&& pedantic
)
10896 pedwarn (input_location
, OPT_Wpedantic
,
10897 "cannot explicitly declare member %q#D to have "
10898 "extern linkage", decl
);
10899 storage_class
= sc_none
;
10902 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10904 error ("declaration of constexpr variable %qD is not a definition",
10906 constexpr_p
= false;
10910 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10912 if (toplevel_bindings_p ())
10914 /* It's common practice (and completely valid) to have a const
10915 be initialized and declared extern. */
10916 if (!(type_quals
& TYPE_QUAL_CONST
))
10917 warning (0, "%qs initialized and declared %<extern%>", name
);
10921 error ("%qs has both %<extern%> and initializer", name
);
10922 return error_mark_node
;
10926 /* Record `register' declaration for warnings on &
10927 and in case doing stupid register allocation. */
10929 if (storage_class
== sc_register
)
10930 DECL_REGISTER (decl
) = 1;
10931 else if (storage_class
== sc_extern
)
10932 DECL_THIS_EXTERN (decl
) = 1;
10933 else if (storage_class
== sc_static
)
10934 DECL_THIS_STATIC (decl
) = 1;
10936 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10937 if (constexpr_p
&& VAR_P (decl
))
10938 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10940 /* Record constancy and volatility on the DECL itself . There's
10941 no need to do this when processing a template; we'll do this
10942 for the instantiated declaration based on the type of DECL. */
10943 if (!processing_template_decl
)
10944 cp_apply_type_quals_to_decl (type_quals
, decl
);
10950 /* Subroutine of start_function. Ensure that each of the parameter
10951 types (as listed in PARMS) is complete, as is required for a
10952 function definition. */
10955 require_complete_types_for_parms (tree parms
)
10957 for (; parms
; parms
= DECL_CHAIN (parms
))
10959 if (dependent_type_p (TREE_TYPE (parms
)))
10961 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10962 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10964 relayout_decl (parms
);
10965 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10968 /* grokparms or complete_type_or_else will have already issued
10970 TREE_TYPE (parms
) = error_mark_node
;
10974 /* Returns nonzero if T is a local variable. */
10977 local_variable_p (const_tree t
)
10980 /* A VAR_DECL with a context that is a _TYPE is a static data
10982 && !TYPE_P (CP_DECL_CONTEXT (t
))
10983 /* Any other non-local variable must be at namespace scope. */
10984 && !DECL_NAMESPACE_SCOPE_P (t
))
10985 || (TREE_CODE (t
) == PARM_DECL
))
10991 /* Like local_variable_p, but suitable for use as a tree-walking
10995 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10998 if (local_variable_p (*tp
)
10999 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11001 else if (TYPE_P (*tp
))
11002 *walk_subtrees
= 0;
11007 /* Check that ARG, which is a default-argument expression for a
11008 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11009 something goes wrong. DECL may also be a _TYPE node, rather than a
11010 DECL, if there is no DECL available. */
11013 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11018 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11019 /* We get a DEFAULT_ARG when looking at an in-class declaration
11020 with a default argument. Ignore the argument for now; we'll
11021 deal with it after the class is complete. */
11030 decl_type
= TREE_TYPE (decl
);
11032 if (arg
== error_mark_node
11033 || decl
== error_mark_node
11034 || TREE_TYPE (arg
) == error_mark_node
11035 || decl_type
== error_mark_node
)
11036 /* Something already went wrong. There's no need to check
11038 return error_mark_node
;
11040 /* [dcl.fct.default]
11042 A default argument expression is implicitly converted to the
11044 ++cp_unevaluated_operand
;
11045 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11047 --cp_unevaluated_operand
;
11049 if (warn_zero_as_null_pointer_constant
11050 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11051 && null_ptr_cst_p (arg
)
11052 && (complain
& tf_warning
)
11053 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11054 return nullptr_node
;
11056 /* [dcl.fct.default]
11058 Local variables shall not be used in default argument
11061 The keyword `this' shall not be used in a default argument of a
11062 member function. */
11063 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11066 if (complain
& tf_warning_or_error
)
11068 if (DECL_NAME (var
) == this_identifier
)
11069 permerror (input_location
, "default argument %qE uses %qD",
11072 error ("default argument %qE uses local variable %qD", arg
, var
);
11074 return error_mark_node
;
11081 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11084 type_is_deprecated (tree type
)
11086 enum tree_code code
;
11087 if (TREE_DEPRECATED (type
))
11089 if (TYPE_NAME (type
)
11090 && TREE_DEPRECATED (TYPE_NAME (type
)))
11093 /* Do warn about using typedefs to a deprecated class. */
11094 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11095 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11097 code
= TREE_CODE (type
);
11099 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11100 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11101 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11102 return type_is_deprecated (TREE_TYPE (type
));
11104 if (TYPE_PTRMEMFUNC_P (type
))
11105 return type_is_deprecated
11106 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11111 /* Decode the list of parameter types for a function type.
11112 Given the list of things declared inside the parens,
11113 return a list of types.
11115 If this parameter does not end with an ellipsis, we append
11118 *PARMS is set to the chain of PARM_DECLs created. */
11121 grokparms (tree parmlist
, tree
*parms
)
11123 tree result
= NULL_TREE
;
11124 tree decls
= NULL_TREE
;
11128 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11130 tree type
= NULL_TREE
;
11131 tree init
= TREE_PURPOSE (parm
);
11132 tree decl
= TREE_VALUE (parm
);
11133 const char *errmsg
;
11135 if (parm
== void_list_node
)
11138 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11141 type
= TREE_TYPE (decl
);
11142 if (VOID_TYPE_P (type
))
11144 if (same_type_p (type
, void_type_node
)
11145 && DECL_SELF_REFERENCE_P (type
)
11146 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11147 /* this is a parmlist of `(void)', which is ok. */
11149 cxx_incomplete_type_error (decl
, type
);
11150 /* It's not a good idea to actually create parameters of
11151 type `void'; other parts of the compiler assume that a
11152 void type terminates the parameter list. */
11153 type
= error_mark_node
;
11154 TREE_TYPE (decl
) = error_mark_node
;
11157 if (type
!= error_mark_node
11158 && TYPE_FOR_JAVA (type
)
11159 && MAYBE_CLASS_TYPE_P (type
))
11161 error ("parameter %qD has Java class type", decl
);
11162 type
= error_mark_node
;
11163 TREE_TYPE (decl
) = error_mark_node
;
11167 if (type
!= error_mark_node
11168 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11171 type
= error_mark_node
;
11172 TREE_TYPE (decl
) = error_mark_node
;
11175 if (type
!= error_mark_node
)
11177 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11179 tree deptype
= type_is_deprecated (type
);
11181 warn_deprecated_use (deptype
, NULL_TREE
);
11184 /* Top-level qualifiers on the parameters are
11185 ignored for function types. */
11186 type
= cp_build_qualified_type (type
, 0);
11187 if (TREE_CODE (type
) == METHOD_TYPE
)
11189 error ("parameter %qD invalidly declared method type", decl
);
11190 type
= build_pointer_type (type
);
11191 TREE_TYPE (decl
) = type
;
11193 else if (abstract_virtuals_error (decl
, type
))
11194 any_error
= 1; /* Seems like a good idea. */
11195 else if (POINTER_TYPE_P (type
))
11197 /* [dcl.fct]/6, parameter types cannot contain pointers
11198 (references) to arrays of unknown bound. */
11199 tree t
= TREE_TYPE (type
);
11200 int ptr
= TYPE_PTR_P (type
);
11204 if (TYPE_PTR_P (t
))
11206 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11208 else if (!TYPE_DOMAIN (t
))
11212 if (TREE_CODE (t
) == ARRAY_TYPE
)
11214 ? G_("parameter %qD includes pointer to array of "
11215 "unknown bound %qT")
11216 : G_("parameter %qD includes reference to array of "
11217 "unknown bound %qT"),
11223 else if (init
&& !processing_template_decl
)
11224 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11227 DECL_CHAIN (decl
) = decls
;
11229 result
= tree_cons (init
, type
, result
);
11231 decls
= nreverse (decls
);
11232 result
= nreverse (result
);
11234 result
= chainon (result
, void_list_node
);
11241 /* D is a constructor or overloaded `operator='.
11243 Let T be the class in which D is declared. Then, this function
11246 -1 if D's is an ill-formed constructor or copy assignment operator
11247 whose first parameter is of type `T'.
11248 0 if D is not a copy constructor or copy assignment
11250 1 if D is a copy constructor or copy assignment operator whose
11251 first parameter is a reference to non-const qualified T.
11252 2 if D is a copy constructor or copy assignment operator whose
11253 first parameter is a reference to const qualified T.
11255 This function can be used as a predicate. Positive values indicate
11256 a copy constructor and nonzero values indicate a copy assignment
11260 copy_fn_p (const_tree d
)
11266 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11268 if (TREE_CODE (d
) == TEMPLATE_DECL
11269 || (DECL_TEMPLATE_INFO (d
)
11270 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11271 /* Instantiations of template member functions are never copy
11272 functions. Note that member functions of templated classes are
11273 represented as template functions internally, and we must
11274 accept those as copy functions. */
11277 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11281 arg_type
= TREE_VALUE (args
);
11282 if (arg_type
== error_mark_node
)
11285 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11287 /* Pass by value copy assignment operator. */
11290 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11291 && !TYPE_REF_IS_RVALUE (arg_type
)
11292 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11294 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11300 args
= TREE_CHAIN (args
);
11302 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11303 /* There are more non-optional args. */
11309 /* D is a constructor or overloaded `operator='.
11311 Let T be the class in which D is declared. Then, this function
11312 returns true when D is a move constructor or move assignment
11313 operator, false otherwise. */
11316 move_fn_p (const_tree d
)
11318 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11320 if (cxx_dialect
== cxx98
)
11321 /* There are no move constructors if we are in C++98 mode. */
11324 if (TREE_CODE (d
) == TEMPLATE_DECL
11325 || (DECL_TEMPLATE_INFO (d
)
11326 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11327 /* Instantiations of template member functions are never move
11328 functions. Note that member functions of templated classes are
11329 represented as template functions internally, and we must
11330 accept those as move functions. */
11333 return move_signature_fn_p (d
);
11336 /* D is a constructor or overloaded `operator='.
11338 Then, this function returns true when D has the same signature as a move
11339 constructor or move assignment operator (because either it is such a
11340 ctor/op= or it is a template specialization with the same signature),
11341 false otherwise. */
11344 move_signature_fn_p (const_tree d
)
11348 bool result
= false;
11350 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11354 arg_type
= TREE_VALUE (args
);
11355 if (arg_type
== error_mark_node
)
11358 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11359 && TYPE_REF_IS_RVALUE (arg_type
)
11360 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11364 args
= TREE_CHAIN (args
);
11366 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11367 /* There are more non-optional args. */
11373 /* Remember any special properties of member function DECL. */
11376 grok_special_member_properties (tree decl
)
11380 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11383 class_type
= DECL_CONTEXT (decl
);
11384 if (DECL_CONSTRUCTOR_P (decl
))
11386 int ctor
= copy_fn_p (decl
);
11388 if (!DECL_ARTIFICIAL (decl
))
11389 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11395 A non-template constructor for class X is a copy
11396 constructor if its first parameter is of type X&, const
11397 X&, volatile X& or const volatile X&, and either there
11398 are no other parameters or else all other parameters have
11399 default arguments. */
11400 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11401 if (user_provided_p (decl
))
11402 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11404 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11406 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11408 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11409 if (user_provided_p (decl
))
11410 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11412 else if (move_fn_p (decl
) && user_provided_p (decl
))
11413 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11414 else if (is_list_ctor (decl
))
11415 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11417 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11418 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11419 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11421 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11425 A non-template assignment operator for class X is a copy
11426 assignment operator if its parameter is of type X, X&, const
11427 X&, volatile X& or const volatile X&. */
11429 int assop
= copy_fn_p (decl
);
11433 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11434 if (user_provided_p (decl
))
11435 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11437 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11439 else if (move_fn_p (decl
) && user_provided_p (decl
))
11440 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11442 /* Destructors are handled in check_methods. */
11445 /* Check a constructor DECL has the correct form. Complains
11446 if the class has a constructor of the form X(X). */
11449 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11451 int ctor_parm
= copy_fn_p (decl
);
11457 A declaration of a constructor for a class X is ill-formed if
11458 its first parameter is of type (optionally cv-qualified) X
11459 and either there are no other parameters or else all other
11460 parameters have default arguments.
11462 We *don't* complain about member template instantiations that
11463 have this form, though; they can occur as we try to decide
11464 what constructor to use during overload resolution. Since
11465 overload resolution will never prefer such a constructor to
11466 the non-template copy constructor (which is either explicitly
11467 or implicitly defined), there's no need to worry about their
11468 existence. Theoretically, they should never even be
11469 instantiated, but that's hard to forestall. */
11470 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11478 /* An operator with this code is unary, but can also be binary. */
11481 ambi_op_p (enum tree_code code
)
11483 return (code
== INDIRECT_REF
11484 || code
== ADDR_EXPR
11485 || code
== UNARY_PLUS_EXPR
11486 || code
== NEGATE_EXPR
11487 || code
== PREINCREMENT_EXPR
11488 || code
== PREDECREMENT_EXPR
);
11491 /* An operator with this name can only be unary. */
11494 unary_op_p (enum tree_code code
)
11496 return (code
== TRUTH_NOT_EXPR
11497 || code
== BIT_NOT_EXPR
11498 || code
== COMPONENT_REF
11499 || code
== TYPE_EXPR
);
11502 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11503 errors are issued for invalid declarations. */
11506 grok_op_properties (tree decl
, bool complain
)
11508 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11510 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11511 tree name
= DECL_NAME (decl
);
11512 enum tree_code operator_code
;
11517 /* Count the number of arguments and check for ellipsis. */
11518 for (argtype
= argtypes
, arity
= 0;
11519 argtype
&& argtype
!= void_list_node
;
11520 argtype
= TREE_CHAIN (argtype
))
11522 ellipsis_p
= !argtype
;
11524 class_type
= DECL_CONTEXT (decl
);
11525 if (class_type
&& !CLASS_TYPE_P (class_type
))
11526 class_type
= NULL_TREE
;
11528 if (DECL_CONV_FN_P (decl
))
11529 operator_code
= TYPE_EXPR
;
11533 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11534 if (ansi_opname (CODE) == name) \
11536 operator_code = (CODE); \
11539 else if (ansi_assopname (CODE) == name) \
11541 operator_code = (CODE); \
11542 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11546 #include "operators.def"
11547 #undef DEF_OPERATOR
11549 gcc_unreachable ();
11552 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11553 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11556 switch (operator_code
)
11559 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11563 TYPE_GETS_DELETE (class_type
) |= 1;
11567 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11570 case VEC_DELETE_EXPR
:
11571 TYPE_GETS_DELETE (class_type
) |= 2;
11578 /* [basic.std.dynamic.allocation]/1:
11580 A program is ill-formed if an allocation function is declared
11581 in a namespace scope other than global scope or declared static
11584 The same also holds true for deallocation functions. */
11585 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11586 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11588 if (DECL_NAMESPACE_SCOPE_P (decl
))
11590 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11592 error ("%qD may not be declared within a namespace", decl
);
11595 else if (!TREE_PUBLIC (decl
))
11597 error ("%qD may not be declared as static", decl
);
11603 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11605 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11606 DECL_IS_OPERATOR_NEW (decl
) = 1;
11608 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11609 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11612 /* An operator function must either be a non-static member function
11613 or have at least one parameter of a class, a reference to a class,
11614 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11615 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11617 if (operator_code
== TYPE_EXPR
11618 || operator_code
== CALL_EXPR
11619 || operator_code
== COMPONENT_REF
11620 || operator_code
== ARRAY_REF
11621 || operator_code
== NOP_EXPR
)
11623 error ("%qD must be a nonstatic member function", decl
);
11630 if (DECL_STATIC_FUNCTION_P (decl
))
11632 error ("%qD must be either a non-static member "
11633 "function or a non-member function", decl
);
11637 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11639 tree arg
= non_reference (TREE_VALUE (p
));
11640 if (arg
== error_mark_node
)
11643 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11644 because these checks are performed even on
11645 template functions. */
11646 if (MAYBE_CLASS_TYPE_P (arg
)
11647 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11651 if (!p
|| p
== void_list_node
)
11654 error ("%qD must have an argument of class or "
11655 "enumerated type", decl
);
11661 /* There are no restrictions on the arguments to an overloaded
11663 if (operator_code
== CALL_EXPR
)
11666 /* Warn about conversion operators that will never be used. */
11667 if (IDENTIFIER_TYPENAME_P (name
)
11668 && ! DECL_TEMPLATE_INFO (decl
)
11670 /* Warn only declaring the function; there is no need to
11671 warn again about out-of-class definitions. */
11672 && class_type
== current_class_type
)
11674 tree t
= TREE_TYPE (name
);
11675 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11678 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11680 if (VOID_TYPE_P (t
))
11681 warning (OPT_Wconversion
,
11683 ? G_("conversion to a reference to void "
11684 "will never use a type conversion operator")
11685 : G_("conversion to void "
11686 "will never use a type conversion operator"));
11687 else if (class_type
)
11689 if (t
== class_type
)
11690 warning (OPT_Wconversion
,
11692 ? G_("conversion to a reference to the same type "
11693 "will never use a type conversion operator")
11694 : G_("conversion to the same type "
11695 "will never use a type conversion operator"));
11696 /* Don't force t to be complete here. */
11697 else if (MAYBE_CLASS_TYPE_P (t
)
11698 && COMPLETE_TYPE_P (t
)
11699 && DERIVED_FROM_P (t
, class_type
))
11700 warning (OPT_Wconversion
,
11702 ? G_("conversion to a reference to a base class "
11703 "will never use a type conversion operator")
11704 : G_("conversion to a base class "
11705 "will never use a type conversion operator"));
11710 if (operator_code
== COND_EXPR
)
11713 error ("ISO C++ prohibits overloading operator ?:");
11716 else if (ellipsis_p
)
11718 error ("%qD must not have variable number of arguments", decl
);
11721 else if (ambi_op_p (operator_code
))
11724 /* We pick the one-argument operator codes by default, so
11725 we don't have to change anything. */
11727 else if (arity
== 2)
11729 /* If we thought this was a unary operator, we now know
11730 it to be a binary operator. */
11731 switch (operator_code
)
11734 operator_code
= MULT_EXPR
;
11738 operator_code
= BIT_AND_EXPR
;
11741 case UNARY_PLUS_EXPR
:
11742 operator_code
= PLUS_EXPR
;
11746 operator_code
= MINUS_EXPR
;
11749 case PREINCREMENT_EXPR
:
11750 operator_code
= POSTINCREMENT_EXPR
;
11753 case PREDECREMENT_EXPR
:
11754 operator_code
= POSTDECREMENT_EXPR
;
11758 gcc_unreachable ();
11761 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11763 if ((operator_code
== POSTINCREMENT_EXPR
11764 || operator_code
== POSTDECREMENT_EXPR
)
11765 && ! processing_template_decl
11766 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11769 error ("postfix %qD must take %<int%> as its argument",
11772 error ("postfix %qD must take %<int%> as its second "
11780 error ("%qD must take either zero or one argument", decl
);
11782 error ("%qD must take either one or two arguments", decl
);
11786 /* More Effective C++ rule 6. */
11788 && (operator_code
== POSTINCREMENT_EXPR
11789 || operator_code
== POSTDECREMENT_EXPR
11790 || operator_code
== PREINCREMENT_EXPR
11791 || operator_code
== PREDECREMENT_EXPR
))
11793 tree arg
= TREE_VALUE (argtypes
);
11794 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11795 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11796 arg
= TREE_TYPE (arg
);
11797 arg
= TYPE_MAIN_VARIANT (arg
);
11798 if (operator_code
== PREINCREMENT_EXPR
11799 || operator_code
== PREDECREMENT_EXPR
)
11801 if (TREE_CODE (ret
) != REFERENCE_TYPE
11802 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11804 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11805 build_reference_type (arg
));
11809 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11810 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11814 else if (unary_op_p (operator_code
))
11819 error ("%qD must take %<void%>", decl
);
11821 error ("%qD must take exactly one argument", decl
);
11825 else /* if (binary_op_p (operator_code)) */
11830 error ("%qD must take exactly one argument", decl
);
11832 error ("%qD must take exactly two arguments", decl
);
11836 /* More Effective C++ rule 7. */
11838 && (operator_code
== TRUTH_ANDIF_EXPR
11839 || operator_code
== TRUTH_ORIF_EXPR
11840 || operator_code
== COMPOUND_EXPR
))
11841 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11845 /* Effective C++ rule 23. */
11848 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11849 && (operator_code
== PLUS_EXPR
11850 || operator_code
== MINUS_EXPR
11851 || operator_code
== TRUNC_DIV_EXPR
11852 || operator_code
== MULT_EXPR
11853 || operator_code
== TRUNC_MOD_EXPR
)
11854 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11855 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11857 /* [over.oper]/8 */
11858 for (; argtypes
&& argtypes
!= void_list_node
;
11859 argtypes
= TREE_CHAIN (argtypes
))
11860 if (TREE_PURPOSE (argtypes
))
11862 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11863 if (operator_code
== POSTINCREMENT_EXPR
11864 || operator_code
== POSTDECREMENT_EXPR
)
11866 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11871 error ("%qD cannot have default arguments", decl
);
11879 /* Return a string giving the keyword associate with CODE. */
11881 static const char *
11882 tag_name (enum tag_types code
)
11894 case typename_type
:
11897 gcc_unreachable ();
11901 /* Name lookup in an elaborated-type-specifier (after the keyword
11902 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11903 elaborated-type-specifier is invalid, issue a diagnostic and return
11904 error_mark_node; otherwise, return the *_TYPE to which it referred.
11905 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11908 check_elaborated_type_specifier (enum tag_types tag_code
,
11910 bool allow_template_p
)
11916 struct S { struct S *p; };
11918 name lookup will find the TYPE_DECL for the implicit "S::S"
11919 typedef. Adjust for that here. */
11920 if (DECL_SELF_REFERENCE_P (decl
))
11921 decl
= TYPE_NAME (TREE_TYPE (decl
));
11923 type
= TREE_TYPE (decl
);
11925 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11926 is false for this case as well. */
11927 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11929 error ("using template type parameter %qT after %qs",
11930 type
, tag_name (tag_code
));
11931 return error_mark_node
;
11933 /* Accept template template parameters. */
11934 else if (allow_template_p
11935 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11936 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11940 If the identifier resolves to a typedef-name or the
11941 simple-template-id resolves to an alias template
11942 specialization, the elaborated-type-specifier is ill-formed.
11944 In other words, the only legitimate declaration to use in the
11945 elaborated type specifier is the implicit typedef created when
11946 the type is declared. */
11947 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11948 && !DECL_SELF_REFERENCE_P (decl
)
11949 && tag_code
!= typename_type
)
11951 if (alias_template_specialization_p (type
))
11952 error ("using alias template specialization %qT after %qs",
11953 type
, tag_name (tag_code
));
11955 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11956 inform (DECL_SOURCE_LOCATION (decl
),
11957 "%qD has a previous declaration here", decl
);
11958 return error_mark_node
;
11960 else if (TREE_CODE (type
) != RECORD_TYPE
11961 && TREE_CODE (type
) != UNION_TYPE
11962 && tag_code
!= enum_type
11963 && tag_code
!= typename_type
)
11965 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11966 inform (input_location
, "%q+T has a previous declaration here", type
);
11967 return error_mark_node
;
11969 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11970 && tag_code
== enum_type
)
11972 error ("%qT referred to as enum", type
);
11973 inform (input_location
, "%q+T has a previous declaration here", type
);
11974 return error_mark_node
;
11976 else if (!allow_template_p
11977 && TREE_CODE (type
) == RECORD_TYPE
11978 && CLASSTYPE_IS_TEMPLATE (type
))
11980 /* If a class template appears as elaborated type specifier
11981 without a template header such as:
11983 template <class T> class C {};
11984 void f(class C); // No template header here
11986 then the required template argument is missing. */
11987 error ("template argument required for %<%s %T%>",
11988 tag_name (tag_code
),
11989 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11990 return error_mark_node
;
11996 /* Lookup NAME in elaborate type specifier in scope according to
11997 SCOPE and issue diagnostics if necessary.
11998 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11999 found, and ERROR_MARK_NODE for type error. */
12002 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12003 tag_scope scope
, bool template_header_p
)
12007 if (scope
== ts_global
)
12009 /* First try ordinary name lookup, ignoring hidden class name
12010 injected via friend declaration. */
12011 decl
= lookup_name_prefer_type (name
, 2);
12012 /* If that fails, the name will be placed in the smallest
12013 non-class, non-function-prototype scope according to 3.3.1/5.
12014 We may already have a hidden name declared as friend in this
12015 scope. So lookup again but not ignoring hidden names.
12016 If we find one, that name will be made visible rather than
12017 creating a new tag. */
12019 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12022 decl
= lookup_type_scope (name
, scope
);
12025 && (DECL_CLASS_TEMPLATE_P (decl
)
12026 /* If scope is ts_current we're defining a class, so ignore a
12027 template template parameter. */
12028 || (scope
!= ts_current
12029 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12030 decl
= DECL_TEMPLATE_RESULT (decl
);
12032 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12034 /* Look for invalid nested type:
12038 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12040 error ("%qD has the same name as the class in which it is "
12043 return error_mark_node
;
12046 /* Two cases we need to consider when deciding if a class
12047 template is allowed as an elaborated type specifier:
12048 1. It is a self reference to its own class.
12049 2. It comes with a template header.
12053 template <class T> class C {
12054 class C *c1; // DECL_SELF_REFERENCE_P is true
12057 template <class U> class C; // template_header_p is true
12058 template <class T> class C<T>::D {
12059 class C *c2; // DECL_SELF_REFERENCE_P is true
12062 t
= check_elaborated_type_specifier (tag_code
,
12065 | DECL_SELF_REFERENCE_P (decl
));
12068 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12070 error ("reference to %qD is ambiguous", name
);
12071 print_candidates (decl
);
12072 return error_mark_node
;
12078 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12079 Define the tag as a forward-reference if it is not defined.
12081 If a declaration is given, process it here, and report an error if
12082 multiple declarations are not identical.
12084 SCOPE is TS_CURRENT when this is also a definition. Only look in
12085 the current frame for the name (since C++ allows new names in any
12086 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12087 declaration. Only look beginning from the current scope outward up
12088 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12090 TEMPLATE_HEADER_P is true when this declaration is preceded by
12091 a set of template parameters. */
12094 xref_tag_1 (enum tag_types tag_code
, tree name
,
12095 tag_scope orig_scope
, bool template_header_p
)
12097 enum tree_code code
;
12099 tree context
= NULL_TREE
;
12102 gcc_assert (identifier_p (name
));
12108 code
= RECORD_TYPE
;
12114 code
= ENUMERAL_TYPE
;
12117 gcc_unreachable ();
12120 if (orig_scope
== ts_lambda
)
12121 scope
= ts_current
;
12123 scope
= orig_scope
;
12125 /* In case of anonymous name, xref_tag is only called to
12126 make type node and push name. Name lookup is not required. */
12127 if (ANON_AGGRNAME_P (name
))
12130 t
= lookup_and_check_tag (tag_code
, name
,
12131 scope
, template_header_p
);
12133 if (t
== error_mark_node
)
12134 return error_mark_node
;
12136 if (scope
!= ts_current
&& t
&& current_class_type
12137 && template_class_depth (current_class_type
)
12138 && template_header_p
)
12140 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12143 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12144 definition of this tag. Since, in addition, we are currently
12145 processing a (member) template declaration of a template
12146 class, we must be very careful; consider:
12153 { template <class V>
12154 friend struct S1; };
12156 Here, the S2::S1 declaration should not be confused with the
12157 outer declaration. In particular, the inner version should
12158 have a template parameter of level 2, not level 1. This
12159 would be particularly important if the member declaration
12162 template <class V = U> friend struct S1;
12164 say, when we should tsubst into `U' when instantiating
12165 S2. On the other hand, when presented with:
12175 we must find the inner binding eventually. We
12176 accomplish this by making sure that the new type we
12177 create to represent this declaration has the right
12179 context
= TYPE_CONTEXT (t
);
12185 /* If no such tag is yet defined, create a forward-reference node
12186 and record it as the "definition".
12187 When a real declaration of this type is found,
12188 the forward-reference will be altered into a real type. */
12189 if (code
== ENUMERAL_TYPE
)
12191 error ("use of enum %q#D without previous declaration", name
);
12192 return error_mark_node
;
12196 t
= make_class_type (code
);
12197 TYPE_CONTEXT (t
) = context
;
12198 if (orig_scope
== ts_lambda
)
12199 /* Remember that we're declaring a lambda to avoid bogus errors
12200 in push_template_decl. */
12201 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12202 t
= pushtag (name
, t
, scope
);
12207 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12209 if (!redeclare_class_template (t
, current_template_parms
))
12210 return error_mark_node
;
12212 else if (!processing_template_decl
12213 && CLASS_TYPE_P (t
)
12214 && CLASSTYPE_IS_TEMPLATE (t
))
12216 error ("redeclaration of %qT as a non-template", t
);
12217 error ("previous declaration %q+D", t
);
12218 return error_mark_node
;
12221 /* Make injected friend class visible. */
12222 if (scope
!= ts_within_enclosing_non_class
12223 && hidden_name_p (TYPE_NAME (t
)))
12225 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12226 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12228 if (TYPE_TEMPLATE_INFO (t
))
12230 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12231 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12239 /* Wrapper for xref_tag_1. */
12242 xref_tag (enum tag_types tag_code
, tree name
,
12243 tag_scope scope
, bool template_header_p
)
12247 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12248 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12249 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12255 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12257 enum tag_types tag_kind
;
12259 if (TREE_CODE (old
) == RECORD_TYPE
)
12260 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12262 tag_kind
= union_type
;
12264 if (id
== NULL_TREE
)
12265 id
= TYPE_IDENTIFIER (old
);
12267 return xref_tag (tag_kind
, id
, scope
, false);
12270 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12271 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12272 access_* node, and the TREE_VALUE is the type of the base-class.
12273 Non-NULL TREE_TYPE indicates virtual inheritance.
12275 Returns true if the binfo hierarchy was successfully created,
12276 false if an error was detected. */
12279 xref_basetypes (tree ref
, tree base_list
)
12282 tree binfo
, base_binfo
;
12283 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12284 unsigned max_bases
= 0; /* Maximum direct bases. */
12286 tree default_access
;
12287 tree igo_prev
; /* Track Inheritance Graph Order. */
12289 if (ref
== error_mark_node
)
12292 /* The base of a derived class is private by default, all others are
12294 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12295 && CLASSTYPE_DECLARED_CLASS (ref
)
12296 ? access_private_node
: access_public_node
);
12298 /* First, make sure that any templates in base-classes are
12299 instantiated. This ensures that if we call ourselves recursively
12300 we do not get confused about which classes are marked and which
12302 basep
= &base_list
;
12305 tree basetype
= TREE_VALUE (*basep
);
12307 /* The dependent_type_p call below should really be dependent_scope_p
12308 so that we give a hard error about using an incomplete type as a
12309 base, but we allow it with a pedwarn for backward
12311 if (processing_template_decl
12312 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12313 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12314 if (!dependent_type_p (basetype
)
12315 && !complete_type_or_else (basetype
, NULL
))
12316 /* An incomplete type. Remove it from the list. */
12317 *basep
= TREE_CHAIN (*basep
);
12321 if (TREE_TYPE (*basep
))
12323 if (CLASS_TYPE_P (basetype
))
12324 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12325 basep
= &TREE_CHAIN (*basep
);
12329 TYPE_MARKED_P (ref
) = 1;
12331 /* The binfo slot should be empty, unless this is an (ill-formed)
12333 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12335 error ("redefinition of %q#T", ref
);
12339 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12341 binfo
= make_tree_binfo (max_bases
);
12343 TYPE_BINFO (ref
) = binfo
;
12344 BINFO_OFFSET (binfo
) = size_zero_node
;
12345 BINFO_TYPE (binfo
) = ref
;
12347 /* Apply base-class info set up to the variants of this type. */
12348 fixup_type_variants (ref
);
12352 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12353 /* An aggregate cannot have baseclasses. */
12354 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12356 if (TREE_CODE (ref
) == UNION_TYPE
)
12358 error ("derived union %qT invalid", ref
);
12365 if (TYPE_FOR_JAVA (ref
))
12367 error ("Java class %qT cannot have multiple bases", ref
);
12374 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12376 if (TYPE_FOR_JAVA (ref
))
12378 error ("Java class %qT cannot have virtual bases", ref
);
12383 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12385 tree access
= TREE_PURPOSE (base_list
);
12386 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12387 tree basetype
= TREE_VALUE (base_list
);
12389 if (access
== access_default_node
)
12390 access
= default_access
;
12392 if (PACK_EXPANSION_P (basetype
))
12393 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12394 if (TREE_CODE (basetype
) == TYPE_DECL
)
12395 basetype
= TREE_TYPE (basetype
);
12396 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12398 error ("base type %qT fails to be a struct or class type",
12403 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12404 TYPE_FOR_JAVA (ref
) = 1;
12406 base_binfo
= NULL_TREE
;
12407 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12409 base_binfo
= TYPE_BINFO (basetype
);
12410 /* The original basetype could have been a typedef'd type. */
12411 basetype
= BINFO_TYPE (base_binfo
);
12413 /* Inherit flags from the base. */
12414 TYPE_HAS_NEW_OPERATOR (ref
)
12415 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12416 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12417 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12418 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12419 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12420 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12421 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12422 CLASSTYPE_REPEATED_BASE_P (ref
)
12423 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12426 /* We must do this test after we've seen through a typedef
12428 if (TYPE_MARKED_P (basetype
))
12430 if (basetype
== ref
)
12431 error ("recursive type %qT undefined", basetype
);
12433 error ("duplicate base type %qT invalid", basetype
);
12437 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12438 /* Regenerate the pack expansion for the bases. */
12439 basetype
= make_pack_expansion (basetype
);
12441 TYPE_MARKED_P (basetype
) = 1;
12443 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12444 &igo_prev
, via_virtual
);
12445 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12446 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12448 BINFO_BASE_APPEND (binfo
, base_binfo
);
12449 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12452 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12453 /* If we didn't get max_vbases vbases, we must have shared at
12454 least one of them, and are therefore diamond shaped. */
12455 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12457 /* Unmark all the types. */
12458 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12459 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12460 TYPE_MARKED_P (ref
) = 0;
12462 /* Now see if we have a repeated base type. */
12463 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12465 for (base_binfo
= binfo
; base_binfo
;
12466 base_binfo
= TREE_CHAIN (base_binfo
))
12468 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12470 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12473 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12475 for (base_binfo
= binfo
; base_binfo
;
12476 base_binfo
= TREE_CHAIN (base_binfo
))
12477 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12478 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12487 /* Copies the enum-related properties from type SRC to type DST.
12488 Used with the underlying type of an enum and the enum itself. */
12490 copy_type_enum (tree dst
, tree src
)
12493 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12495 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12496 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12497 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12498 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12499 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12500 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12501 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12502 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12503 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12507 /* Begin compiling the definition of an enumeration type.
12510 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12512 UNDERLYING_TYPE is the type that will be used as the storage for
12513 the enumeration type. This should be NULL_TREE if no storage type
12516 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12518 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12520 Returns the type object, as yet incomplete.
12521 Also records info about it so that build_enumerator
12522 may be used to declare the individual values as they are read. */
12525 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12526 bool scoped_enum_p
, bool *is_new
)
12528 tree prevtype
= NULL_TREE
;
12529 gcc_assert (identifier_p (name
));
12533 /* [C++0x dcl.enum]p5:
12535 If not explicitly specified, the underlying type of a scoped
12536 enumeration type is int. */
12537 if (!underlying_type
&& scoped_enum_p
)
12538 underlying_type
= integer_type_node
;
12540 if (underlying_type
)
12541 underlying_type
= cv_unqualified (underlying_type
);
12543 /* If this is the real definition for a previous forward reference,
12544 fill in the contents in the same object that used to be the
12545 forward reference. */
12547 enumtype
= lookup_and_check_tag (enum_type
, name
,
12548 /*tag_scope=*/ts_current
,
12549 /*template_header_p=*/false);
12551 /* In case of a template_decl, the only check that should be deferred
12552 to instantiation time is the comparison of underlying types. */
12553 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12555 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12557 error_at (input_location
, "scoped/unscoped mismatch "
12558 "in enum %q#T", enumtype
);
12559 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12560 "previous definition here");
12561 enumtype
= error_mark_node
;
12563 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12565 error_at (input_location
, "underlying type mismatch "
12566 "in enum %q#T", enumtype
);
12567 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12568 "previous definition here");
12569 enumtype
= error_mark_node
;
12571 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12572 && !dependent_type_p (underlying_type
)
12573 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12574 && !same_type_p (underlying_type
,
12575 ENUM_UNDERLYING_TYPE (enumtype
)))
12577 error_at (input_location
, "different underlying type "
12578 "in enum %q#T", enumtype
);
12579 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12580 "previous definition here");
12581 underlying_type
= NULL_TREE
;
12585 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12586 || processing_template_decl
)
12588 /* In case of error, make a dummy enum to allow parsing to
12590 if (enumtype
== error_mark_node
)
12592 name
= make_anon_name ();
12593 enumtype
= NULL_TREE
;
12596 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12597 of an opaque enum, or an opaque enum of an already defined
12598 enumeration (C++0x only).
12599 In any other case, it'll be NULL_TREE. */
12605 prevtype
= enumtype
;
12607 /* Do not push the decl more than once, unless we need to
12608 compare underlying types at instantiation time */
12610 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12611 || (underlying_type
12612 && dependent_type_p (underlying_type
))
12613 || (ENUM_UNDERLYING_TYPE (enumtype
)
12614 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12616 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12617 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12620 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12623 if (enumtype
== error_mark_node
)
12624 return error_mark_node
;
12626 /* The enum is considered opaque until the opening '{' of the
12627 enumerator list. */
12628 SET_OPAQUE_ENUM_P (enumtype
, true);
12629 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12632 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12634 if (underlying_type
)
12636 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12638 copy_type_enum (enumtype
, underlying_type
);
12639 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12641 else if (dependent_type_p (underlying_type
))
12642 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12644 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12645 underlying_type
, enumtype
);
12648 /* If into a template class, the returned enum is always the first
12649 declaration (opaque or not) seen. This way all the references to
12650 this type will be to the same declaration. The following ones are used
12651 only to check for definition errors. */
12652 if (prevtype
&& processing_template_decl
)
12658 /* After processing and defining all the values of an enumeration type,
12659 install their decls in the enumeration type.
12660 ENUMTYPE is the type object. */
12663 finish_enum_value_list (tree enumtype
)
12666 tree underlying_type
;
12669 tree minnode
, maxnode
;
12672 bool fixed_underlying_type_p
12673 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12675 /* We built up the VALUES in reverse order. */
12676 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12678 /* For an enum defined in a template, just set the type of the values;
12679 all further processing is postponed until the template is
12680 instantiated. We need to set the type so that tsubst of a CONST_DECL
12682 if (processing_template_decl
)
12684 for (values
= TYPE_VALUES (enumtype
);
12686 values
= TREE_CHAIN (values
))
12687 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12691 /* Determine the minimum and maximum values of the enumerators. */
12692 if (TYPE_VALUES (enumtype
))
12694 minnode
= maxnode
= NULL_TREE
;
12696 for (values
= TYPE_VALUES (enumtype
);
12698 values
= TREE_CHAIN (values
))
12700 decl
= TREE_VALUE (values
);
12702 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12703 each enumerator has the type of its enumeration. Prior to the
12704 closing brace, the type of each enumerator is the type of its
12705 initializing value. */
12706 TREE_TYPE (decl
) = enumtype
;
12708 /* Update the minimum and maximum values, if appropriate. */
12709 value
= DECL_INITIAL (decl
);
12710 if (value
== error_mark_node
)
12711 value
= integer_zero_node
;
12712 /* Figure out what the minimum and maximum values of the
12713 enumerators are. */
12715 minnode
= maxnode
= value
;
12716 else if (tree_int_cst_lt (maxnode
, value
))
12718 else if (tree_int_cst_lt (value
, minnode
))
12725 If the enumerator-list is empty, the underlying type is as if
12726 the enumeration had a single enumerator with value 0. */
12727 minnode
= maxnode
= integer_zero_node
;
12729 if (!fixed_underlying_type_p
)
12731 /* Compute the number of bits require to represent all values of the
12732 enumeration. We must do this before the type of MINNODE and
12733 MAXNODE are transformed, since tree_int_cst_min_precision relies
12734 on the TREE_TYPE of the value it is passed. */
12735 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12736 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12737 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12738 int precision
= MAX (lowprec
, highprec
);
12740 bool use_short_enum
;
12742 /* Determine the underlying type of the enumeration.
12746 The underlying type of an enumeration is an integral type that
12747 can represent all the enumerator values defined in the
12748 enumeration. It is implementation-defined which integral type is
12749 used as the underlying type for an enumeration except that the
12750 underlying type shall not be larger than int unless the value of
12751 an enumerator cannot fit in an int or unsigned int.
12753 We use "int" or an "unsigned int" as the underlying type, even if
12754 a smaller integral type would work, unless the user has
12755 explicitly requested that we use the smallest possible type. The
12756 user can request that for all enumerations with a command line
12757 flag, or for just one enumeration with an attribute. */
12759 use_short_enum
= flag_short_enums
12760 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12762 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12766 underlying_type
= integer_types
[itk
];
12767 if (underlying_type
!= NULL_TREE
12768 && TYPE_PRECISION (underlying_type
) >= precision
12769 && TYPE_SIGN (underlying_type
) == sgn
)
12772 if (itk
== itk_none
)
12776 IF no integral type can represent all the enumerator values, the
12777 enumeration is ill-formed. */
12778 error ("no integral type can represent all of the enumerator values "
12779 "for %qT", enumtype
);
12780 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12781 underlying_type
= integer_types
[itk_unsigned_long_long
];
12786 The value of sizeof() applied to an enumeration type, an object
12787 of an enumeration type, or an enumerator, is the value of sizeof()
12788 applied to the underlying type. */
12789 copy_type_enum (enumtype
, underlying_type
);
12791 /* Compute the minimum and maximum values for the type.
12795 For an enumeration where emin is the smallest enumerator and emax
12796 is the largest, the values of the enumeration are the values of the
12797 underlying type in the range bmin to bmax, where bmin and bmax are,
12798 respectively, the smallest and largest values of the smallest bit-
12799 field that can store emin and emax. */
12801 /* The middle-end currently assumes that types with TYPE_PRECISION
12802 narrower than their underlying type are suitably zero or sign
12803 extended to fill their mode. Similarly, it assumes that the front
12804 end assures that a value of a particular type must be within
12805 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12807 We used to set these fields based on bmin and bmax, but that led
12808 to invalid assumptions like optimizing away bounds checking. So
12809 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12810 TYPE_MAX_VALUE to the values for the mode above and only restrict
12811 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12812 ENUM_UNDERLYING_TYPE (enumtype
)
12813 = build_distinct_type_copy (underlying_type
);
12814 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12815 set_min_and_max_values_for_integral_type
12816 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12818 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12819 if (flag_strict_enums
)
12820 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12823 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12825 /* Convert each of the enumerators to the type of the underlying
12826 type of the enumeration. */
12827 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12829 location_t saved_location
;
12831 decl
= TREE_VALUE (values
);
12832 saved_location
= input_location
;
12833 input_location
= DECL_SOURCE_LOCATION (decl
);
12834 if (fixed_underlying_type_p
)
12835 /* If the enumeration type has a fixed underlying type, we
12836 already checked all of the enumerator values. */
12837 value
= DECL_INITIAL (decl
);
12839 value
= perform_implicit_conversion (underlying_type
,
12840 DECL_INITIAL (decl
),
12841 tf_warning_or_error
);
12842 input_location
= saved_location
;
12844 /* Do not clobber shared ints. */
12845 value
= copy_node (value
);
12847 TREE_TYPE (value
) = enumtype
;
12848 DECL_INITIAL (decl
) = value
;
12851 /* Fix up all variant types of this enum type. */
12852 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12853 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12855 if (at_class_scope_p ()
12856 && COMPLETE_TYPE_P (current_class_type
)
12857 && UNSCOPED_ENUM_P (enumtype
))
12858 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12859 current_class_type
);
12861 /* Finish debugging output for this type. */
12862 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12865 /* Finishes the enum type. This is called only the first time an
12866 enumeration is seen, be it opaque or odinary.
12867 ENUMTYPE is the type object. */
12870 finish_enum (tree enumtype
)
12872 if (processing_template_decl
)
12874 if (at_function_scope_p ())
12875 add_stmt (build_min (TAG_DEFN
, enumtype
));
12879 /* If this is a forward declaration, there should not be any variants,
12880 though we can get a variant in the middle of an enum-specifier with
12881 wacky code like 'enum E { e = sizeof(const E*) };' */
12882 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12883 && (TYPE_VALUES (enumtype
)
12884 || !TYPE_NEXT_VARIANT (enumtype
)));
12887 /* Build and install a CONST_DECL for an enumeration constant of the
12888 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12889 LOC is the location of NAME.
12890 Assignment of sequential values by default is handled here. */
12893 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12899 /* If the VALUE was erroneous, pretend it wasn't there; that will
12900 result in the enum being assigned the next value in sequence. */
12901 if (value
== error_mark_node
)
12904 /* Remove no-op casts from the value. */
12906 STRIP_TYPE_NOPS (value
);
12908 if (! processing_template_decl
)
12910 /* Validate and default VALUE. */
12911 if (value
!= NULL_TREE
)
12913 value
= cxx_constant_value (value
);
12915 if (TREE_CODE (value
) != INTEGER_CST
12916 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12918 error ("enumerator value for %qD is not an integer constant",
12924 /* Default based on previous value. */
12925 if (value
== NULL_TREE
)
12927 if (TYPE_VALUES (enumtype
))
12932 /* C++03 7.2/4: If no initializer is specified for the first
12933 enumerator, the type is an unspecified integral
12934 type. Otherwise the type is the same as the type of the
12935 initializing value of the preceding enumerator unless the
12936 incremented value is not representable in that type, in
12937 which case the type is an unspecified integral type
12938 sufficient to contain the incremented value. */
12939 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12940 if (error_operand_p (prev_value
))
12941 value
= error_mark_node
;
12944 tree type
= TREE_TYPE (prev_value
);
12945 signop sgn
= TYPE_SIGN (type
);
12946 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
12950 bool pos
= !wi::neg_p (wi
, sgn
);
12951 if (!wi::fits_to_tree_p (wi
, type
))
12954 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12956 type
= integer_types
[itk
];
12957 if (type
!= NULL_TREE
12958 && (pos
|| !TYPE_UNSIGNED (type
))
12959 && wi::fits_to_tree_p (wi
, type
))
12962 if (type
&& cxx_dialect
< cxx11
12963 && itk
> itk_unsigned_long
)
12964 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12965 incremented enumerator value is too large for %<unsigned long%>" : "\
12966 incremented enumerator value is too large for %<long%>");
12968 if (type
== NULL_TREE
)
12971 value
= wide_int_to_tree (type
, wi
);
12976 error ("overflow in enumeration values at %qD", name
);
12977 value
= error_mark_node
;
12982 value
= integer_zero_node
;
12985 /* Remove no-op casts from the value. */
12986 STRIP_TYPE_NOPS (value
);
12988 /* If the underlying type of the enum is fixed, check whether
12989 the enumerator values fits in the underlying type. If it
12990 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12991 if (ENUM_UNDERLYING_TYPE (enumtype
)
12993 && TREE_CODE (value
) == INTEGER_CST
)
12995 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12996 error ("enumerator value %E is outside the range of underlying "
12997 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12999 /* Convert the value to the appropriate type. */
13000 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13004 /* C++ associates enums with global, function, or class declarations. */
13005 context
= current_scope ();
13007 /* Build the actual enumeration constant. Note that the enumeration
13008 constants have the underlying type of the enum (if it is fixed)
13009 or the type of their initializer (if the underlying type of the
13010 enum is not fixed):
13014 If the underlying type is fixed, the type of each enumerator
13015 prior to the closing brace is the underlying type; if the
13016 initializing value of an enumerator cannot be represented by
13017 the underlying type, the program is ill-formed. If the
13018 underlying type is not fixed, the type of each enumerator is
13019 the type of its initializing value.
13021 If the underlying type is not fixed, it will be computed by
13022 finish_enum and we will reset the type of this enumerator. Of
13023 course, if we're processing a template, there may be no value. */
13024 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13026 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13028 DECL_CONTEXT (decl
) = enumtype
;
13029 TREE_CONSTANT (decl
) = 1;
13030 TREE_READONLY (decl
) = 1;
13031 DECL_INITIAL (decl
) = value
;
13033 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13034 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13035 on the TYPE_FIELDS list for `S'. (That's so that you can say
13036 things like `S::i' later.) */
13037 finish_member_declaration (decl
);
13041 /* Add this enumeration constant to the list for this type. */
13042 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13045 /* Look for an enumerator with the given NAME within the enumeration
13046 type ENUMTYPE. This routine is used primarily for qualified name
13047 lookup into an enumerator in C++0x, e.g.,
13049 enum class Color { Red, Green, Blue };
13051 Color color = Color::Red;
13053 Returns the value corresponding to the enumerator, or
13054 NULL_TREE if no such enumerator was found. */
13056 lookup_enumerator (tree enumtype
, tree name
)
13059 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13061 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13062 return e
? TREE_VALUE (e
) : NULL_TREE
;
13066 /* We're defining DECL. Make sure that its type is OK. */
13069 check_function_type (tree decl
, tree current_function_parms
)
13071 tree fntype
= TREE_TYPE (decl
);
13072 tree return_type
= complete_type (TREE_TYPE (fntype
));
13074 /* In a function definition, arg types must be complete. */
13075 require_complete_types_for_parms (current_function_parms
);
13077 if (dependent_type_p (return_type
)
13078 || type_uses_auto (return_type
))
13080 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13081 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13083 tree args
= TYPE_ARG_TYPES (fntype
);
13085 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13086 error ("return type %q#T is incomplete", return_type
);
13088 error ("return type has Java class type %q#T", return_type
);
13090 /* Make it return void instead. */
13091 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13092 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13094 TREE_CHAIN (args
));
13096 fntype
= build_function_type (void_type_node
, args
);
13098 = build_exception_variant (fntype
,
13099 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13100 fntype
= (cp_build_type_attribute_variant
13101 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13102 TREE_TYPE (decl
) = fntype
;
13105 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13108 /* Create the FUNCTION_DECL for a function definition.
13109 DECLSPECS and DECLARATOR are the parts of the declaration;
13110 they describe the function's name and the type it returns,
13111 but twisted together in a fashion that parallels the syntax of C.
13113 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13114 DECLARATOR is really the DECL for the function we are about to
13115 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13116 indicating that the function is an inline defined in-class.
13118 This function creates a binding context for the function body
13119 as well as setting up the FUNCTION_DECL in current_function_decl.
13121 For C++, we must first check whether that datum makes any sense.
13122 For example, "class A local_a(1,2);" means that variable local_a
13123 is an aggregate of type A, which should have a constructor
13124 applied to it with the argument list [1, 2].
13126 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13127 or may be a BLOCK if the function has been defined previously
13128 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13129 error_mark_node if the function has never been defined, or
13130 a BLOCK if the function has been defined somewhere. */
13133 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13135 tree ctype
= NULL_TREE
;
13138 int doing_friend
= 0;
13139 cp_binding_level
*bl
;
13140 tree current_function_parms
;
13141 struct c_fileinfo
*finfo
13142 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13143 bool honor_interface
;
13145 /* Sanity check. */
13146 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13147 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13149 fntype
= TREE_TYPE (decl1
);
13150 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13151 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13153 /* ISO C++ 11.4/5. A friend function defined in a class is in
13154 the (lexical) scope of the class in which it is defined. */
13155 if (!ctype
&& DECL_FRIEND_P (decl1
))
13157 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13159 /* CTYPE could be null here if we're dealing with a template;
13160 for example, `inline friend float foo()' inside a template
13161 will have no CTYPE set. */
13162 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13168 if (DECL_DECLARED_INLINE_P (decl1
)
13169 && lookup_attribute ("noinline", attrs
))
13170 warning (0, "inline function %q+D given attribute noinline", decl1
);
13172 /* Handle gnu_inline attribute. */
13173 if (GNU_INLINE_P (decl1
))
13175 DECL_EXTERNAL (decl1
) = 1;
13176 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13177 DECL_INTERFACE_KNOWN (decl1
) = 1;
13178 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13181 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13182 /* This is a constructor, we must ensure that any default args
13183 introduced by this definition are propagated to the clones
13184 now. The clones are used directly in overload resolution. */
13185 adjust_clone_args (decl1
);
13187 /* Sometimes we don't notice that a function is a static member, and
13188 build a METHOD_TYPE for it. Fix that up now. */
13189 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13190 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13192 /* Set up current_class_type, and enter the scope of the class, if
13195 push_nested_class (ctype
);
13196 else if (DECL_STATIC_FUNCTION_P (decl1
))
13197 push_nested_class (DECL_CONTEXT (decl1
));
13199 /* Now that we have entered the scope of the class, we must restore
13200 the bindings for any template parameters surrounding DECL1, if it
13201 is an inline member template. (Order is important; consider the
13202 case where a template parameter has the same name as a field of
13203 the class.) It is not until after this point that
13204 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13205 if (flags
& SF_INCLASS_INLINE
)
13206 maybe_begin_member_template_processing (decl1
);
13208 /* Effective C++ rule 15. */
13210 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13211 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13212 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13214 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13215 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13216 if (!DECL_INITIAL (decl1
))
13217 DECL_INITIAL (decl1
) = error_mark_node
;
13219 /* This function exists in static storage.
13220 (This does not mean `static' in the C sense!) */
13221 TREE_STATIC (decl1
) = 1;
13223 /* We must call push_template_decl after current_class_type is set
13224 up. (If we are processing inline definitions after exiting a
13225 class scope, current_class_type will be NULL_TREE until set above
13226 by push_nested_class.) */
13227 if (processing_template_decl
)
13229 tree newdecl1
= push_template_decl (decl1
);
13230 if (newdecl1
== error_mark_node
)
13232 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13233 pop_nested_class ();
13239 /* We are now in the scope of the function being defined. */
13240 current_function_decl
= decl1
;
13242 /* Save the parm names or decls from this function's declarator
13243 where store_parm_decls will find them. */
13244 current_function_parms
= DECL_ARGUMENTS (decl1
);
13246 /* Make sure the parameter and return types are reasonable. When
13247 you declare a function, these types can be incomplete, but they
13248 must be complete when you define the function. */
13249 check_function_type (decl1
, current_function_parms
);
13251 /* Build the return declaration for the function. */
13252 restype
= TREE_TYPE (fntype
);
13254 if (DECL_RESULT (decl1
) == NULL_TREE
)
13258 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13259 DECL_ARTIFICIAL (resdecl
) = 1;
13260 DECL_IGNORED_P (resdecl
) = 1;
13261 DECL_RESULT (decl1
) = resdecl
;
13263 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13266 /* Let the user know we're compiling this function. */
13267 announce_function (decl1
);
13269 /* Record the decl so that the function name is defined.
13270 If we already have a decl for this name, and it is a FUNCTION_DECL,
13271 use the old decl. */
13272 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13274 /* A specialization is not used to guide overload resolution. */
13275 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13276 && !(DECL_USE_TEMPLATE (decl1
) &&
13277 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13279 tree olddecl
= pushdecl (decl1
);
13281 if (olddecl
== error_mark_node
)
13282 /* If something went wrong when registering the declaration,
13283 use DECL1; we have to have a FUNCTION_DECL to use when
13284 parsing the body of the function. */
13288 /* Otherwise, OLDDECL is either a previous declaration
13289 of the same function or DECL1 itself. */
13291 if (warn_missing_declarations
13292 && olddecl
== decl1
13293 && !DECL_MAIN_P (decl1
)
13294 && TREE_PUBLIC (decl1
)
13295 && !DECL_DECLARED_INLINE_P (decl1
))
13299 /* Check whether DECL1 is in an anonymous
13301 for (context
= DECL_CONTEXT (decl1
);
13303 context
= DECL_CONTEXT (context
))
13305 if (TREE_CODE (context
) == NAMESPACE_DECL
13306 && DECL_NAME (context
) == NULL_TREE
)
13310 if (context
== NULL
)
13311 warning (OPT_Wmissing_declarations
,
13312 "no previous declaration for %q+D", decl1
);
13320 /* We need to set the DECL_CONTEXT. */
13321 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13322 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13324 fntype
= TREE_TYPE (decl1
);
13325 restype
= TREE_TYPE (fntype
);
13327 /* If #pragma weak applies, mark the decl appropriately now.
13328 The pragma only applies to global functions. Because
13329 determining whether or not the #pragma applies involves
13330 computing the mangled name for the declaration, we cannot
13331 apply the pragma until after we have merged this declaration
13332 with any previous declarations; if the original declaration
13333 has a linkage specification, that specification applies to
13334 the definition as well, and may affect the mangled name. */
13335 if (DECL_FILE_SCOPE_P (decl1
))
13336 maybe_apply_pragma_weak (decl1
);
13339 /* Reset this in case the call to pushdecl changed it. */
13340 current_function_decl
= decl1
;
13342 gcc_assert (DECL_INITIAL (decl1
));
13344 /* This function may already have been parsed, in which case just
13345 return; our caller will skip over the body without parsing. */
13346 if (DECL_INITIAL (decl1
) != error_mark_node
)
13349 /* Initialize RTL machinery. We cannot do this until
13350 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13351 even when processing a template; this is how we get
13352 CFUN set up, and our per-function variables initialized.
13353 FIXME factor out the non-RTL stuff. */
13354 bl
= current_binding_level
;
13355 allocate_struct_function (decl1
, processing_template_decl
);
13357 /* Initialize the language data structures. Whenever we start
13358 a new function, we destroy temporaries in the usual way. */
13359 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13360 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13361 current_binding_level
= bl
;
13363 if (!processing_template_decl
&& type_uses_auto (restype
))
13365 FNDECL_USED_AUTO (decl1
) = true;
13366 current_function_auto_return_pattern
= restype
;
13369 /* Start the statement-tree, start the tree now. */
13370 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13372 /* If we are (erroneously) defining a function that we have already
13373 defined before, wipe out what we knew before. */
13374 if (!DECL_PENDING_INLINE_P (decl1
))
13375 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13377 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13379 /* We know that this was set up by `grokclassfn'. We do not
13380 wait until `store_parm_decls', since evil parse errors may
13381 never get us to that point. Here we keep the consistency
13382 between `current_class_type' and `current_class_ptr'. */
13383 tree t
= DECL_ARGUMENTS (decl1
);
13385 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13386 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13388 cp_function_chain
->x_current_class_ref
13389 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13390 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13391 cp_function_chain
->x_current_class_ptr
= t
;
13393 /* Constructors and destructors need to know whether they're "in
13394 charge" of initializing virtual base classes. */
13395 t
= DECL_CHAIN (t
);
13396 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13398 current_in_charge_parm
= t
;
13399 t
= DECL_CHAIN (t
);
13401 if (DECL_HAS_VTT_PARM_P (decl1
))
13403 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13404 current_vtt_parm
= t
;
13408 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13409 /* Implicitly-defined methods (like the
13410 destructor for a class in which no destructor
13411 is explicitly declared) must not be defined
13412 until their definition is needed. So, we
13413 ignore interface specifications for
13414 compiler-generated functions. */
13415 && !DECL_ARTIFICIAL (decl1
));
13417 if (processing_template_decl
)
13418 /* Don't mess with interface flags. */;
13419 else if (DECL_INTERFACE_KNOWN (decl1
))
13421 tree ctx
= decl_function_context (decl1
);
13423 if (DECL_NOT_REALLY_EXTERN (decl1
))
13424 DECL_EXTERNAL (decl1
) = 0;
13426 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13427 /* This is a function in a local class in an extern inline
13428 or template function. */
13429 comdat_linkage (decl1
);
13431 /* If this function belongs to an interface, it is public.
13432 If it belongs to someone else's interface, it is also external.
13433 This only affects inlines and template instantiations. */
13434 else if (!finfo
->interface_unknown
&& honor_interface
)
13436 if (DECL_DECLARED_INLINE_P (decl1
)
13437 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13439 DECL_EXTERNAL (decl1
)
13440 = (finfo
->interface_only
13441 || (DECL_DECLARED_INLINE_P (decl1
)
13442 && ! flag_implement_inlines
13443 && !DECL_VINDEX (decl1
)));
13445 /* For WIN32 we also want to put these in linkonce sections. */
13446 maybe_make_one_only (decl1
);
13449 DECL_EXTERNAL (decl1
) = 0;
13450 DECL_INTERFACE_KNOWN (decl1
) = 1;
13451 /* If this function is in an interface implemented in this file,
13452 make sure that the back end knows to emit this function
13454 if (!DECL_EXTERNAL (decl1
))
13455 mark_needed (decl1
);
13457 else if (finfo
->interface_unknown
&& finfo
->interface_only
13458 && honor_interface
)
13460 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13461 interface, we will have both finfo->interface_unknown and
13462 finfo->interface_only set. In that case, we don't want to
13463 use the normal heuristics because someone will supply a
13464 #pragma implementation elsewhere, and deducing it here would
13465 produce a conflict. */
13466 comdat_linkage (decl1
);
13467 DECL_EXTERNAL (decl1
) = 0;
13468 DECL_INTERFACE_KNOWN (decl1
) = 1;
13469 DECL_DEFER_OUTPUT (decl1
) = 1;
13473 /* This is a definition, not a reference.
13474 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13475 if (!GNU_INLINE_P (decl1
))
13476 DECL_EXTERNAL (decl1
) = 0;
13478 if ((DECL_DECLARED_INLINE_P (decl1
)
13479 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13480 && ! DECL_INTERFACE_KNOWN (decl1
))
13481 DECL_DEFER_OUTPUT (decl1
) = 1;
13483 DECL_INTERFACE_KNOWN (decl1
) = 1;
13486 /* Determine the ELF visibility attribute for the function. We must not
13487 do this before calling "pushdecl", as we must allow "duplicate_decls"
13488 to merge any attributes appropriately. We also need to wait until
13490 if (!DECL_CLONED_FUNCTION_P (decl1
))
13491 determine_visibility (decl1
);
13493 if (!processing_template_decl
)
13494 maybe_instantiate_noexcept (decl1
);
13496 begin_scope (sk_function_parms
, decl1
);
13500 if (DECL_DESTRUCTOR_P (decl1
)
13501 || (DECL_CONSTRUCTOR_P (decl1
)
13502 && targetm
.cxx
.cdtor_returns_this ()))
13504 cdtor_label
= build_decl (input_location
,
13505 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13506 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13509 start_fname_decls ();
13511 store_parm_decls (current_function_parms
);
13517 /* Like start_preparsed_function, except that instead of a
13518 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13520 Returns true on success. If the DECLARATOR is not suitable
13521 for a function, we return false, which tells the parser to
13522 skip the entire function. */
13525 start_function (cp_decl_specifier_seq
*declspecs
,
13526 const cp_declarator
*declarator
,
13531 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13532 if (decl1
== error_mark_node
)
13534 /* If the declarator is not suitable for a function definition,
13535 cause a syntax error. */
13536 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13538 error ("invalid function declaration");
13542 if (DECL_MAIN_P (decl1
))
13543 /* main must return int. grokfndecl should have corrected it
13544 (and issued a diagnostic) if the user got it wrong. */
13545 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13546 integer_type_node
));
13548 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13551 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13555 use_eh_spec_block (tree fn
)
13557 return (flag_exceptions
&& flag_enforce_eh_specs
13558 && !processing_template_decl
13559 && !type_throw_all_p (TREE_TYPE (fn
))
13560 /* We insert the EH_SPEC_BLOCK only in the original
13561 function; then, it is copied automatically to the
13563 && !DECL_CLONED_FUNCTION_P (fn
)
13564 /* Implicitly-generated constructors and destructors have
13565 exception specifications. However, those specifications
13566 are the union of the possible exceptions specified by the
13567 constructors/destructors for bases and members, so no
13568 unallowed exception will ever reach this function. By
13569 not creating the EH_SPEC_BLOCK we save a little memory,
13570 and we avoid spurious warnings about unreachable
13572 && !DECL_DEFAULTED_FN (fn
));
13575 /* Store the parameter declarations into the current function declaration.
13576 This is called after parsing the parameter declarations, before
13577 digesting the body of the function.
13579 Also install to binding contour return value identifier, if any. */
13582 store_parm_decls (tree current_function_parms
)
13584 tree fndecl
= current_function_decl
;
13587 /* This is a chain of any other decls that came in among the parm
13588 declarations. If a parm is declared with enum {foo, bar} x;
13589 then CONST_DECLs for foo and bar are put here. */
13590 tree nonparms
= NULL_TREE
;
13592 if (current_function_parms
)
13594 /* This case is when the function was defined with an ANSI prototype.
13595 The parms already have decls, so we need not do anything here
13596 except record them as in effect
13597 and complain if any redundant old-style parm decls were written. */
13599 tree specparms
= current_function_parms
;
13602 /* Must clear this because it might contain TYPE_DECLs declared
13604 current_binding_level
->names
= NULL
;
13606 /* If we're doing semantic analysis, then we'll call pushdecl
13607 for each of these. We must do them in reverse order so that
13608 they end in the correct forward order. */
13609 specparms
= nreverse (specparms
);
13611 for (parm
= specparms
; parm
; parm
= next
)
13613 next
= DECL_CHAIN (parm
);
13614 if (TREE_CODE (parm
) == PARM_DECL
)
13616 if (DECL_NAME (parm
) == NULL_TREE
13617 || !VOID_TYPE_P (parm
))
13620 error ("parameter %qD declared void", parm
);
13624 /* If we find an enum constant or a type tag,
13625 put it aside for the moment. */
13626 TREE_CHAIN (parm
) = NULL_TREE
;
13627 nonparms
= chainon (nonparms
, parm
);
13631 /* Get the decls in their original chain order and record in the
13632 function. This is all and only the PARM_DECLs that were
13633 pushed into scope by the loop above. */
13634 DECL_ARGUMENTS (fndecl
) = getdecls ();
13637 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13639 /* Now store the final chain of decls for the arguments
13640 as the decl-chain of the current lexical scope.
13641 Put the enumerators in as well, at the front so that
13642 DECL_ARGUMENTS is not modified. */
13643 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13645 if (use_eh_spec_block (current_function_decl
))
13646 current_eh_spec_block
= begin_eh_spec_block ();
13650 /* We have finished doing semantic analysis on DECL, but have not yet
13651 generated RTL for its body. Save away our current state, so that
13652 when we want to generate RTL later we know what to do. */
13655 save_function_data (tree decl
)
13657 struct language_function
*f
;
13659 /* Save the language-specific per-function data so that we can
13660 get it back when we really expand this function. */
13661 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13664 f
= ggc_alloc
<language_function
> ();
13665 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13666 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13668 /* Clear out the bits we don't need. */
13669 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13670 f
->bindings
= NULL
;
13671 f
->x_local_names
= NULL
;
13672 f
->base
.local_typedefs
= NULL
;
13676 /* Set the return value of the constructor (if present). */
13679 finish_constructor_body (void)
13684 if (targetm
.cxx
.cdtor_returns_this ()
13685 && (! TYPE_FOR_JAVA (current_class_type
)))
13687 /* Any return from a constructor will end up here. */
13688 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13690 val
= DECL_ARGUMENTS (current_function_decl
);
13691 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13692 DECL_RESULT (current_function_decl
), val
);
13693 /* Return the address of the object. */
13694 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13695 add_stmt (exprstmt
);
13699 /* Do all the processing for the beginning of a destructor; set up the
13700 vtable pointers and cleanups for bases and members. */
13703 begin_destructor_body (void)
13705 tree compound_stmt
;
13707 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13708 issued an error message. We still want to try to process the
13709 body of the function, but initialize_vtbl_ptrs will crash if
13710 TYPE_BINFO is NULL. */
13711 if (COMPLETE_TYPE_P (current_class_type
))
13713 compound_stmt
= begin_compound_stmt (0);
13714 /* Make all virtual function table pointers in non-virtual base
13715 classes point to CURRENT_CLASS_TYPE's virtual function
13717 initialize_vtbl_ptrs (current_class_ptr
);
13718 finish_compound_stmt (compound_stmt
);
13720 /* Insert a cleanup to let the back end know that the object is dead
13721 when we exit the destructor, either normally or via exception. */
13722 tree clobber
= build_constructor (current_class_type
, NULL
);
13723 TREE_THIS_VOLATILE (clobber
) = true;
13724 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13725 current_class_ref
, clobber
);
13726 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13728 /* And insert cleanups for our bases and members so that they
13729 will be properly destroyed if we throw. */
13730 push_base_cleanups ();
13734 /* At the end of every destructor we generate code to delete the object if
13735 necessary. Do that now. */
13738 finish_destructor_body (void)
13742 /* Any return from a destructor will end up here; that way all base
13743 and member cleanups will be run when the function returns. */
13744 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13746 /* In a virtual destructor, we must call delete. */
13747 if (DECL_VIRTUAL_P (current_function_decl
))
13750 tree virtual_size
= cxx_sizeof (current_class_type
);
13754 At the point of definition of a virtual destructor (including
13755 an implicit definition), non-placement operator delete shall
13756 be looked up in the scope of the destructor's class and if
13757 found shall be accessible and unambiguous. */
13758 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13760 /*global_p=*/false,
13761 /*placement=*/NULL_TREE
,
13762 /*alloc_fn=*/NULL_TREE
,
13763 tf_warning_or_error
);
13765 if_stmt
= begin_if_stmt ();
13766 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13767 current_in_charge_parm
,
13770 finish_expr_stmt (exprstmt
);
13771 finish_then_clause (if_stmt
);
13772 finish_if_stmt (if_stmt
);
13775 if (targetm
.cxx
.cdtor_returns_this ())
13779 val
= DECL_ARGUMENTS (current_function_decl
);
13780 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13781 DECL_RESULT (current_function_decl
), val
);
13782 /* Return the address of the object. */
13783 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13784 add_stmt (exprstmt
);
13788 /* Do the necessary processing for the beginning of a function body, which
13789 in this case includes member-initializers, but not the catch clauses of
13790 a function-try-block. Currently, this means opening a binding level
13791 for the member-initializers (in a ctor), member cleanups (in a dtor),
13792 and capture proxies (in a lambda operator()). */
13795 begin_function_body (void)
13799 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13802 if (processing_template_decl
)
13803 /* Do nothing now. */;
13805 /* Always keep the BLOCK node associated with the outermost pair of
13806 curly braces of a function. These are needed for correct
13807 operation of dwarfout.c. */
13808 keep_next_level (true);
13810 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13812 if (processing_template_decl
)
13813 /* Do nothing now. */;
13814 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13815 begin_destructor_body ();
13820 /* Do the processing for the end of a function body. Currently, this means
13821 closing out the cleanups for fully-constructed bases and members, and in
13822 the case of the destructor, deleting the object if desired. Again, this
13823 is only meaningful for [cd]tors, since they are the only functions where
13824 there is a significant distinction between the main body and any
13825 function catch clauses. Handling, say, main() return semantics here
13826 would be wrong, as flowing off the end of a function catch clause for
13827 main() would also need to return 0. */
13830 finish_function_body (tree compstmt
)
13832 if (compstmt
== NULL_TREE
)
13835 /* Close the block. */
13836 finish_compound_stmt (compstmt
);
13838 if (processing_template_decl
)
13839 /* Do nothing now. */;
13840 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13841 finish_constructor_body ();
13842 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13843 finish_destructor_body ();
13846 /* Given a function, returns the BLOCK corresponding to the outermost level
13847 of curly braces, skipping the artificial block created for constructor
13851 outer_curly_brace_block (tree fndecl
)
13853 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13854 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13855 /* Skip the artificial function body block. */
13856 block
= BLOCK_SUBBLOCKS (block
);
13860 /* If FNDECL is a class's key method, add the class to the list of
13861 keyed classes that should be emitted. */
13864 record_key_method_defined (tree fndecl
)
13866 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13867 && DECL_VIRTUAL_P (fndecl
)
13868 && !processing_template_decl
)
13870 tree fnclass
= DECL_CONTEXT (fndecl
);
13871 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13872 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13876 /* Subroutine of finish_function.
13877 Save the body of constexpr functions for possible
13878 future compile time evaluation. */
13881 maybe_save_function_definition (tree fun
)
13883 if (!processing_template_decl
13884 && DECL_DECLARED_CONSTEXPR_P (fun
)
13885 && !DECL_CLONED_FUNCTION_P (fun
))
13886 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13889 /* Finish up a function declaration and compile that function
13890 all the way to assembler language output. The free the storage
13891 for the function definition.
13893 FLAGS is a bitwise or of the following values:
13895 We just finished processing the body of an in-class inline
13896 function definition. (This processing will have taken place
13897 after the class definition is complete.) */
13900 finish_function (int flags
)
13902 tree fndecl
= current_function_decl
;
13903 tree fntype
, ctype
= NULL_TREE
;
13904 int inclass_inline
= (flags
& 2) != 0;
13906 /* When we get some parse errors, we can end up without a
13907 current_function_decl, so cope. */
13908 if (fndecl
== NULL_TREE
)
13909 return error_mark_node
;
13911 if (c_dialect_objc ())
13912 objc_finish_function ();
13914 gcc_assert (!defer_mark_used_calls
);
13915 defer_mark_used_calls
= true;
13917 record_key_method_defined (fndecl
);
13919 fntype
= TREE_TYPE (fndecl
);
13921 /* TREE_READONLY (fndecl) = 1;
13922 This caused &foo to be of type ptr-to-const-function
13923 which then got a warning when stored in a ptr-to-function variable. */
13925 gcc_assert (building_stmt_list_p ());
13926 /* The current function is being defined, so its DECL_INITIAL should
13927 be set, and unless there's a multiple definition, it should be
13928 error_mark_node. */
13929 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13931 /* For a cloned function, we've already got all the code we need;
13932 there's no need to add any extra bits. */
13933 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13935 /* Make it so that `main' always returns 0 by default. */
13936 if (DECL_MAIN_P (current_function_decl
))
13937 finish_return_stmt (integer_zero_node
);
13939 if (use_eh_spec_block (current_function_decl
))
13940 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13941 (TREE_TYPE (current_function_decl
)),
13942 current_eh_spec_block
);
13945 /* If we're saving up tree structure, tie off the function now. */
13946 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13948 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
13949 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
13951 finish_fname_decls ();
13953 /* If this function can't throw any exceptions, remember that. */
13954 if (!processing_template_decl
13955 && !cp_function_chain
->can_throw
13956 && !flag_non_call_exceptions
13957 && !decl_replaceable_p (fndecl
))
13958 TREE_NOTHROW (fndecl
) = 1;
13960 /* This must come after expand_function_end because cleanups might
13961 have declarations (from inline functions) that need to go into
13962 this function's blocks. */
13964 /* If the current binding level isn't the outermost binding level
13965 for this function, either there is a bug, or we have experienced
13966 syntax errors and the statement tree is malformed. */
13967 if (current_binding_level
->kind
!= sk_function_parms
)
13969 /* Make sure we have already experienced errors. */
13970 gcc_assert (errorcount
);
13972 /* Throw away the broken statement tree and extra binding
13974 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13976 while (current_binding_level
->kind
!= sk_function_parms
)
13978 if (current_binding_level
->kind
== sk_class
)
13979 pop_nested_class ();
13981 poplevel (0, 0, 0);
13984 poplevel (1, 0, 1);
13986 /* Statements should always be full-expressions at the outermost set
13987 of curly braces for a function. */
13988 gcc_assert (stmts_are_full_exprs_p ());
13990 /* If there are no return statements in a function with auto return type,
13991 the return type is void. But if the declared type is something like
13992 auto*, this is an error. */
13993 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13994 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13996 if (!is_auto (current_function_auto_return_pattern
)
13997 && !current_function_returns_value
&& !current_function_returns_null
)
13999 error ("no return statements in function returning %qT",
14000 current_function_auto_return_pattern
);
14001 inform (input_location
, "only plain %<auto%> return type can be "
14002 "deduced to %<void%>");
14004 apply_deduced_return_type (fndecl
, void_type_node
);
14005 fntype
= TREE_TYPE (fndecl
);
14008 /* Save constexpr function body before it gets munged by
14009 the NRV transformation. */
14010 maybe_save_function_definition (fndecl
);
14012 /* Set up the named return value optimization, if we can. Candidate
14013 variables are selected in check_return_expr. */
14014 if (current_function_return_value
)
14016 tree r
= current_function_return_value
;
14019 if (r
!= error_mark_node
14020 /* This is only worth doing for fns that return in memory--and
14021 simpler, since we don't have to worry about promoted modes. */
14022 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14023 /* Only allow this for variables declared in the outer scope of
14024 the function so we know that their lifetime always ends with a
14025 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14026 we were to do this optimization in tree-ssa. */
14027 && (outer
= outer_curly_brace_block (fndecl
))
14028 && chain_member (r
, BLOCK_VARS (outer
)))
14029 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14031 current_function_return_value
= NULL_TREE
;
14034 /* Remember that we were in class scope. */
14035 if (current_class_name
)
14036 ctype
= current_class_type
;
14038 /* Must mark the RESULT_DECL as being in this function. */
14039 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14041 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14042 to the FUNCTION_DECL node itself. */
14043 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14045 /* Save away current state, if appropriate. */
14046 if (!processing_template_decl
)
14047 save_function_data (fndecl
);
14049 /* Complain if there's just no return statement. */
14050 if (warn_return_type
14051 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14052 && !dependent_type_p (TREE_TYPE (fntype
))
14053 && !current_function_returns_value
&& !current_function_returns_null
14054 /* Don't complain if we abort or throw. */
14055 && !current_function_returns_abnormally
14056 /* Don't complain if there's an infinite loop. */
14057 && !current_function_infinite_loop
14058 /* Don't complain if we are declared noreturn. */
14059 && !TREE_THIS_VOLATILE (fndecl
)
14060 && !DECL_NAME (DECL_RESULT (fndecl
))
14061 && !TREE_NO_WARNING (fndecl
)
14062 /* Structor return values (if any) are set by the compiler. */
14063 && !DECL_CONSTRUCTOR_P (fndecl
)
14064 && !DECL_DESTRUCTOR_P (fndecl
)
14065 && targetm
.warn_func_return (fndecl
))
14067 warning (OPT_Wreturn_type
,
14068 "no return statement in function returning non-void");
14069 TREE_NO_WARNING (fndecl
) = 1;
14072 /* Store the end of the function, so that we get good line number
14073 info for the epilogue. */
14074 cfun
->function_end_locus
= input_location
;
14076 /* Complain about parameters that are only set, but never otherwise used. */
14077 if (warn_unused_but_set_parameter
14078 && !processing_template_decl
14079 && errorcount
== unused_but_set_errorcount
14080 && !DECL_CLONED_FUNCTION_P (fndecl
))
14084 for (decl
= DECL_ARGUMENTS (fndecl
);
14086 decl
= DECL_CHAIN (decl
))
14087 if (TREE_USED (decl
)
14088 && TREE_CODE (decl
) == PARM_DECL
14089 && !DECL_READ_P (decl
)
14090 && DECL_NAME (decl
)
14091 && !DECL_ARTIFICIAL (decl
)
14092 && !TREE_NO_WARNING (decl
)
14093 && !DECL_IN_SYSTEM_HEADER (decl
)
14094 && TREE_TYPE (decl
) != error_mark_node
14095 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14096 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14097 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14098 warning (OPT_Wunused_but_set_parameter
,
14099 "parameter %q+D set but not used", decl
);
14100 unused_but_set_errorcount
= errorcount
;
14103 /* Complain about locally defined typedefs that are not used in this
14105 maybe_warn_unused_local_typedefs ();
14107 /* Genericize before inlining. */
14108 if (!processing_template_decl
)
14110 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14111 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14112 cp_genericize (fndecl
);
14113 /* Clear out the bits we don't need. */
14114 f
->x_current_class_ptr
= NULL
;
14115 f
->x_current_class_ref
= NULL
;
14116 f
->x_eh_spec_block
= NULL
;
14117 f
->x_in_charge_parm
= NULL
;
14118 f
->x_vtt_parm
= NULL
;
14119 f
->x_return_value
= NULL
;
14120 f
->bindings
= NULL
;
14121 f
->extern_decl_map
= NULL
;
14122 f
->infinite_loops
= NULL
;
14124 /* Clear out the bits we don't need. */
14125 local_names
= NULL
;
14127 /* We're leaving the context of this function, so zap cfun. It's still in
14128 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14130 current_function_decl
= NULL
;
14132 /* If this is an in-class inline definition, we may have to pop the
14133 bindings for the template parameters that we added in
14134 maybe_begin_member_template_processing when start_function was
14136 if (inclass_inline
)
14137 maybe_end_member_template_processing ();
14139 /* Leave the scope of the class. */
14141 pop_nested_class ();
14146 current_function_decl
= NULL_TREE
;
14148 defer_mark_used_calls
= false;
14149 if (deferred_mark_used_calls
)
14154 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14156 vec_free (deferred_mark_used_calls
);
14162 /* Create the FUNCTION_DECL for a function definition.
14163 DECLSPECS and DECLARATOR are the parts of the declaration;
14164 they describe the return type and the name of the function,
14165 but twisted together in a fashion that parallels the syntax of C.
14167 This function creates a binding context for the function body
14168 as well as setting up the FUNCTION_DECL in current_function_decl.
14170 Returns a FUNCTION_DECL on success.
14172 If the DECLARATOR is not suitable for a function (it defines a datum
14173 instead), we return 0, which tells yyparse to report a parse error.
14175 May return void_type_node indicating that this method is actually
14176 a friend. See grokfield for more details.
14178 Came here with a `.pushlevel' .
14180 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14181 CHANGES TO CODE IN `grokfield'. */
14184 grokmethod (cp_decl_specifier_seq
*declspecs
,
14185 const cp_declarator
*declarator
, tree attrlist
)
14187 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14190 if (fndecl
== error_mark_node
)
14191 return error_mark_node
;
14193 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14195 error ("invalid member function declaration");
14196 return error_mark_node
;
14200 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14202 /* Pass friends other than inline friend functions back. */
14203 if (fndecl
== void_type_node
)
14206 if (DECL_IN_AGGR_P (fndecl
))
14208 if (DECL_CLASS_SCOPE_P (fndecl
))
14209 error ("%qD is already defined in class %qT", fndecl
,
14210 DECL_CONTEXT (fndecl
));
14211 return error_mark_node
;
14214 check_template_shadow (fndecl
);
14216 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14217 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14219 /* We process method specializations in finish_struct_1. */
14220 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14222 fndecl
= push_template_decl (fndecl
);
14223 if (fndecl
== error_mark_node
)
14227 if (! DECL_FRIEND_P (fndecl
))
14229 if (DECL_CHAIN (fndecl
))
14231 fndecl
= copy_node (fndecl
);
14232 TREE_CHAIN (fndecl
) = NULL_TREE
;
14236 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14238 DECL_IN_AGGR_P (fndecl
) = 1;
14243 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14244 we can lay it out later, when and if its type becomes complete.
14246 Also handle constexpr pointer to member variables where the initializer
14247 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14250 maybe_register_incomplete_var (tree var
)
14252 gcc_assert (VAR_P (var
));
14254 /* Keep track of variables with incomplete types. */
14255 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14256 && DECL_EXTERNAL (var
))
14258 tree inner_type
= TREE_TYPE (var
);
14260 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14261 inner_type
= TREE_TYPE (inner_type
);
14262 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14264 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14265 /* RTTI TD entries are created while defining the type_info. */
14266 || (TYPE_LANG_SPECIFIC (inner_type
)
14267 && TYPE_BEING_DEFINED (inner_type
)))
14269 incomplete_var iv
= {var
, inner_type
};
14270 vec_safe_push (incomplete_vars
, iv
);
14272 else if (TYPE_PTRMEM_P (inner_type
)
14273 && DECL_INITIAL (var
)
14274 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14276 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14277 gcc_assert (TYPE_BEING_DEFINED (context
));
14278 incomplete_var iv
= {var
, context
};
14279 vec_safe_push (incomplete_vars
, iv
);
14284 /* Called when a class type (given by TYPE) is defined. If there are
14285 any existing VAR_DECLs whose type has been completed by this
14286 declaration, update them now. */
14289 complete_vars (tree type
)
14292 incomplete_var
*iv
;
14294 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14296 if (same_type_p (type
, iv
->incomplete_type
))
14298 tree var
= iv
->decl
;
14299 tree type
= TREE_TYPE (var
);
14301 if (TYPE_PTRMEM_P (type
))
14302 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14305 /* Complete the type of the variable. The VAR_DECL itself
14306 will be laid out in expand_expr. */
14307 complete_type (type
);
14308 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14311 /* Remove this entry from the list. */
14312 incomplete_vars
->unordered_remove (ix
);
14318 /* Check for pending declarations which may have abstract type. */
14319 complete_type_check_abstract (type
);
14322 /* If DECL is of a type which needs a cleanup, build and return an
14323 expression to perform that cleanup here. Return NULL_TREE if no
14324 cleanup need be done. */
14327 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14333 /* Assume no cleanup is required. */
14334 cleanup
= NULL_TREE
;
14336 if (error_operand_p (decl
))
14339 /* Handle "__attribute__((cleanup))". We run the cleanup function
14340 before the destructor since the destructor is what actually
14341 terminates the lifetime of the object. */
14342 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14349 /* Get the name specified by the user for the cleanup function. */
14350 id
= TREE_VALUE (TREE_VALUE (attr
));
14351 /* Look up the name to find the cleanup function to call. It is
14352 important to use lookup_name here because that is what is
14353 used in c-common.c:handle_cleanup_attribute when performing
14354 initial checks on the attribute. Note that those checks
14355 include ensuring that the function found is not an overloaded
14356 function, or an object with an overloaded call operator,
14357 etc.; we can rely on the fact that the function found is an
14358 ordinary FUNCTION_DECL. */
14359 fn
= lookup_name (id
);
14360 arg
= build_address (decl
);
14362 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14363 if (cleanup
== error_mark_node
)
14364 return error_mark_node
;
14366 /* Handle ordinary C++ destructors. */
14367 type
= TREE_TYPE (decl
);
14368 if (type_build_dtor_call (type
))
14370 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14374 if (TREE_CODE (type
) == ARRAY_TYPE
)
14377 addr
= build_address (decl
);
14379 call
= build_delete (TREE_TYPE (addr
), addr
,
14380 sfk_complete_destructor
, flags
, 0, complain
);
14381 if (call
== error_mark_node
)
14382 cleanup
= error_mark_node
;
14383 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14384 /* Discard the call. */;
14386 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14391 /* build_delete sets the location of the destructor call to the
14392 current location, even though the destructor is going to be
14393 called later, at the end of the current scope. This can lead to
14394 a "jumpy" behaviour for users of debuggers when they step around
14395 the end of the block. So let's unset the location of the
14396 destructor call instead. */
14397 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14398 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14401 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14402 /* Treat objects with destructors as used; the destructor may do
14403 something substantive. */
14410 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14411 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14412 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14415 static_fn_type (tree memfntype
)
14420 if (TYPE_PTRMEMFUNC_P (memfntype
))
14421 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14422 if (POINTER_TYPE_P (memfntype
)
14423 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14424 memfntype
= TREE_TYPE (memfntype
);
14425 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14427 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14428 args
= TYPE_ARG_TYPES (memfntype
);
14429 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14430 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14431 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14432 fntype
= (cp_build_type_attribute_variant
14433 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14434 fntype
= (build_exception_variant
14435 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14436 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14437 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14441 /* DECL was originally constructed as a non-static member function,
14442 but turned out to be static. Update it accordingly. */
14445 revert_static_member_fn (tree decl
)
14447 tree stype
= static_fn_type (decl
);
14448 cp_cv_quals quals
= type_memfn_quals (stype
);
14449 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14451 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14452 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14454 TREE_TYPE (decl
) = stype
;
14456 if (DECL_ARGUMENTS (decl
))
14457 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14458 DECL_STATIC_FUNCTION_P (decl
) = 1;
14461 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14462 one of the language-independent trees. */
14464 enum cp_tree_node_structure_enum
14465 cp_tree_node_structure (union lang_tree_node
* t
)
14467 switch (TREE_CODE (&t
->generic
))
14469 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14470 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14471 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14472 case OVERLOAD
: return TS_CP_OVERLOAD
;
14473 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14474 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14475 case BASELINK
: return TS_CP_BASELINK
;
14476 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14477 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14478 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14479 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14480 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14481 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14482 default: return TS_CP_GENERIC
;
14486 /* Build the void_list_node (void_type_node having been created). */
14488 build_void_list_node (void)
14490 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14495 cp_missing_noreturn_ok_p (tree decl
)
14497 /* A missing noreturn is ok for the `main' function. */
14498 return DECL_MAIN_P (decl
);
14501 /* Return the decl used to identify the COMDAT group into which DECL should
14505 cxx_comdat_group (tree decl
)
14507 /* Virtual tables, construction virtual tables, and virtual table
14508 tables all go in a single COMDAT group, named after the primary
14510 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14511 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14512 /* For all other DECLs, the COMDAT group is the mangled name of the
14513 declaration itself. */
14516 while (DECL_THUNK_P (decl
))
14518 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14519 into the same section as the target function. In that case
14520 we must return target's name. */
14521 tree target
= THUNK_TARGET (decl
);
14522 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14523 && DECL_SECTION_NAME (target
) != NULL
14524 && DECL_ONE_ONLY (target
))
14534 /* Returns the return type for FN as written by the user, which may include
14535 a placeholder for a deduced return type. */
14538 fndecl_declared_return_type (tree fn
)
14540 fn
= STRIP_TEMPLATE (fn
);
14541 if (FNDECL_USED_AUTO (fn
))
14543 struct language_function
*f
= NULL
;
14544 if (DECL_STRUCT_FUNCTION (fn
))
14545 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14547 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14548 return f
->x_auto_return_pattern
;
14550 return TREE_TYPE (TREE_TYPE (fn
));
14553 /* Returns true iff DECL was declared with an auto return type and it has
14554 not yet been deduced to a real type. */
14557 undeduced_auto_decl (tree decl
)
14559 if (cxx_dialect
< cxx1y
)
14561 return type_uses_auto (TREE_TYPE (decl
));
14564 /* Complain if DECL has an undeduced return type. */
14567 require_deduced_type (tree decl
)
14569 if (undeduced_auto_decl (decl
))
14570 error ("use of %qD before deduction of %<auto%>", decl
);
14573 #include "gt-cp-decl.h"