1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2013 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
36 #include "tree-iterator.h"
37 #include "tree-inline.h"
44 #include "c-family/c-common.h"
45 #include "c-family/c-objc.h"
46 #include "c-family/c-pragma.h"
47 #include "diagnostic.h"
51 #include "pointer-set.h"
52 #include "splay-tree.h"
56 /* Possible cases of bad specifiers type used by bad_specifiers. */
58 BSP_VAR
, /* variable */
59 BSP_PARM
, /* parameter */
64 static tree
grokparms (tree parmlist
, tree
*);
65 static const char *redeclaration_error_message (tree
, tree
);
67 static int decl_jump_unsafe (tree
);
68 static void require_complete_types_for_parms (tree
);
69 static int ambi_op_p (enum tree_code
);
70 static int unary_op_p (enum tree_code
);
71 static void push_local_name (tree
);
72 static tree
grok_reference_init (tree
, tree
, tree
, int);
73 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
75 static int check_static_variable_definition (tree
, tree
);
76 static void record_unknown_type (tree
, const char *);
77 static tree
builtin_function_1 (tree
, tree
, bool);
78 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
79 static int member_function_or_else (tree
, tree
, enum overload_flags
);
80 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
82 static void check_for_uninitialized_const_var (tree
);
83 static hashval_t
typename_hash (const void *);
84 static int typename_compare (const void *, const void *);
85 static tree
local_variable_p_walkfn (tree
*, int *, void *);
86 static tree
record_builtin_java_type (const char *, int);
87 static const char *tag_name (enum tag_types
);
88 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
89 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
90 static void maybe_deduce_size_from_array_init (tree
, tree
);
91 static void layout_var_decl (tree
);
92 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
93 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
94 static void save_function_data (tree
);
95 static void copy_type_enum (tree
, tree
);
96 static void check_function_type (tree
, tree
);
97 static void finish_constructor_body (void);
98 static void begin_destructor_body (void);
99 static void finish_destructor_body (void);
100 static void record_key_method_defined (tree
);
101 static tree
create_array_type_for_decl (tree
, tree
, tree
);
102 static tree
get_atexit_node (void);
103 static tree
get_dso_handle_node (void);
104 static tree
start_cleanup_fn (void);
105 static void end_cleanup_fn (void);
106 static tree
cp_make_fname_decl (location_t
, tree
, int);
107 static void initialize_predefined_identifiers (void);
108 static tree check_special_function_return_type
109 (special_function_kind
, tree
, tree
);
110 static tree
push_cp_library_fn (enum tree_code
, tree
);
111 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
112 static void store_parm_decls (tree
);
113 static void initialize_local_var (tree
, tree
);
114 static void expand_static_init (tree
, tree
);
116 /* The following symbols are subsumed in the cp_global_trees array, and
117 listed here individually for documentation purposes.
120 tree wchar_decl_node;
122 tree vtable_entry_type;
123 tree delta_type_node;
124 tree __t_desc_type_node;
126 tree class_type_node;
127 tree unknown_type_node;
129 Array type `vtable_entry_type[]'
132 tree vtbl_ptr_type_node;
139 A FUNCTION_DECL which can call `abort'. Not necessarily the
140 one that the user will declare, but sufficient to be called
141 by routines that want to abort the program.
145 The FUNCTION_DECL for the default `::operator delete'.
147 tree global_delete_fndecl;
150 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
151 tree tinfo_var_id; */
153 tree cp_global_trees
[CPTI_MAX
];
155 /* Indicates that there is a type value in some namespace, although
156 that is not necessarily in scope at the moment. */
158 tree global_type_node
;
160 /* The node that holds the "name" of the global scope. */
161 tree global_scope_name
;
163 #define local_names cp_function_chain->x_local_names
165 /* A list of objects which have constructors or destructors
166 which reside in the global scope. The decl is stored in
167 the TREE_VALUE slot and the initializer is stored
168 in the TREE_PURPOSE slot. */
169 tree static_aggregates
;
171 /* Like static_aggregates, but for thread_local variables. */
176 /* A node for the integer constant 2. */
178 tree integer_two_node
;
180 /* Used only for jumps to as-yet undefined labels, since jumps to
181 defined labels can have their validity checked immediately. */
183 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
184 struct named_label_use_entry
*next
;
185 /* The binding level to which this entry is *currently* attached.
186 This is initially the binding level in which the goto appeared,
187 but is modified as scopes are closed. */
188 cp_binding_level
*binding_level
;
189 /* The head of the names list that was current when the goto appeared,
190 or the inner scope popped. These are the decls that will *not* be
191 skipped when jumping to the label. */
193 /* The location of the goto, for error reporting. */
194 location_t o_goto_locus
;
195 /* True if an OpenMP structured block scope has been closed since
196 the goto appeared. This means that the branch from the label will
197 illegally exit an OpenMP scope. */
201 /* A list of all LABEL_DECLs in the function that have names. Here so
202 we can clear out their names' definitions at the end of the
203 function, and so we can check the validity of jumps to these labels. */
205 struct GTY(()) named_label_entry
{
206 /* The decl itself. */
209 /* The binding level to which the label is *currently* attached.
210 This is initially set to the binding level in which the label
211 is defined, but is modified as scopes are closed. */
212 cp_binding_level
*binding_level
;
213 /* The head of the names list that was current when the label was
214 defined, or the inner scope popped. These are the decls that will
215 be skipped when jumping to the label. */
217 /* A vector of all decls from all binding levels that would be
218 crossed by a backward branch to the label. */
219 vec
<tree
, va_gc
> *bad_decls
;
221 /* A list of uses of the label, before the label is defined. */
222 struct named_label_use_entry
*uses
;
224 /* The following bits are set after the label is defined, and are
225 updated as scopes are popped. They indicate that a backward jump
226 to the label will illegally enter a scope of the given flavor. */
232 #define named_labels cp_function_chain->x_named_labels
234 /* The number of function bodies which we are currently processing.
235 (Zero if we are at namespace scope, one inside the body of a
236 function, two inside the body of a function in a local class, etc.) */
239 /* To avoid unwanted recursion, finish_function defers all mark_used calls
240 encountered during its execution until it finishes. */
241 bool defer_mark_used_calls
;
242 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
244 /* States indicating how grokdeclarator() should handle declspecs marked
245 with __attribute__((deprecated)). An object declared as
246 __attribute__((deprecated)) suppresses warnings of uses of other
248 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
251 /* A list of VAR_DECLs whose type was incomplete at the time the
252 variable was declared. */
254 typedef struct GTY(()) incomplete_var_d
{
256 tree incomplete_type
;
260 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
262 /* Returns the kind of template specialization we are currently
263 processing, given that it's declaration contained N_CLASS_SCOPES
264 explicit scope qualifications. */
267 current_tmpl_spec_kind (int n_class_scopes
)
269 int n_template_parm_scopes
= 0;
270 int seen_specialization_p
= 0;
271 int innermost_specialization_p
= 0;
274 /* Scan through the template parameter scopes. */
275 for (b
= current_binding_level
;
276 b
->kind
== sk_template_parms
;
279 /* If we see a specialization scope inside a parameter scope,
280 then something is wrong. That corresponds to a declaration
283 template <class T> template <> ...
285 which is always invalid since [temp.expl.spec] forbids the
286 specialization of a class member template if the enclosing
287 class templates are not explicitly specialized as well. */
288 if (b
->explicit_spec_p
)
290 if (n_template_parm_scopes
== 0)
291 innermost_specialization_p
= 1;
293 seen_specialization_p
= 1;
295 else if (seen_specialization_p
== 1)
296 return tsk_invalid_member_spec
;
298 ++n_template_parm_scopes
;
301 /* Handle explicit instantiations. */
302 if (processing_explicit_instantiation
)
304 if (n_template_parm_scopes
!= 0)
305 /* We've seen a template parameter list during an explicit
306 instantiation. For example:
308 template <class T> template void f(int);
310 This is erroneous. */
311 return tsk_invalid_expl_inst
;
313 return tsk_expl_inst
;
316 if (n_template_parm_scopes
< n_class_scopes
)
317 /* We've not seen enough template headers to match all the
318 specialized classes present. For example:
320 template <class T> void R<T>::S<T>::f(int);
322 This is invalid; there needs to be one set of template
323 parameters for each class. */
324 return tsk_insufficient_parms
;
325 else if (n_template_parm_scopes
== n_class_scopes
)
326 /* We're processing a non-template declaration (even though it may
327 be a member of a template class.) For example:
329 template <class T> void S<T>::f(int);
331 The `class T' matches the `S<T>', leaving no template headers
332 corresponding to the `f'. */
334 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
335 /* We've got too many template headers. For example:
337 template <> template <class T> void f (T);
339 There need to be more enclosing classes. */
340 return tsk_excessive_parms
;
342 /* This must be a template. It's of the form:
344 template <class T> template <class U> void S<T>::f(U);
346 This is a specialization if the innermost level was a
347 specialization; otherwise it's just a definition of the
349 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
352 /* Exit the current scope. */
360 /* When a label goes out of scope, check to see if that label was used
361 in a valid manner, and issue any appropriate warnings or errors. */
364 pop_label (tree label
, tree old_value
)
366 if (!processing_template_decl
)
368 if (DECL_INITIAL (label
) == NULL_TREE
)
372 error ("label %q+D used but not defined", label
);
373 location
= input_location
; /* FIXME want (input_filename, (line)0) */
374 /* Avoid crashing later. */
375 define_label (location
, DECL_NAME (label
));
378 warn_for_unused_label (label
);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels_1 (void **slot
, void *data
)
391 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
392 tree block
= (tree
) data
;
394 pop_label (ent
->label_decl
, NULL_TREE
);
396 /* Put the labels into the "variables" of the top-level block,
397 so debugger can see them. */
398 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
399 BLOCK_VARS (block
) = ent
->label_decl
;
401 htab_clear_slot (named_labels
, slot
);
407 pop_labels (tree block
)
411 htab_traverse (named_labels
, pop_labels_1
, block
);
416 /* At the end of a block with local labels, restore the outer definition. */
419 pop_local_label (tree label
, tree old_value
)
421 struct named_label_entry dummy
;
424 pop_label (label
, old_value
);
426 dummy
.label_decl
= label
;
427 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
428 htab_clear_slot (named_labels
, slot
);
431 /* The following two routines are used to interface to Objective-C++.
432 The binding level is purposely treated as an opaque type. */
435 objc_get_current_scope (void)
437 return current_binding_level
;
440 /* The following routine is used by the NeXT-style SJLJ exceptions;
441 variables get marked 'volatile' so as to not be clobbered by
442 _setjmp()/_longjmp() calls. All variables in the current scope,
443 as well as parent scopes up to (but not including) ENCLOSING_BLK
444 shall be thusly marked. */
447 objc_mark_locals_volatile (void *enclosing_blk
)
449 cp_binding_level
*scope
;
451 for (scope
= current_binding_level
;
452 scope
&& scope
!= enclosing_blk
;
453 scope
= scope
->level_chain
)
457 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
458 objc_volatilize_decl (decl
);
460 /* Do not climb up past the current function. */
461 if (scope
->kind
== sk_function_parms
)
466 /* Update data for defined and undefined labels when leaving a scope. */
469 poplevel_named_label_1 (void **slot
, void *data
)
471 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
472 cp_binding_level
*bl
= (cp_binding_level
*) data
;
473 cp_binding_level
*obl
= bl
->level_chain
;
475 if (ent
->binding_level
== bl
)
479 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
480 TREE_LISTs representing OVERLOADs, so be careful. */
481 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
483 : TREE_CHAIN (decl
)))
484 if (decl_jump_unsafe (decl
))
485 vec_safe_push (ent
->bad_decls
, decl
);
487 ent
->binding_level
= obl
;
488 ent
->names_in_scope
= obl
->names
;
492 ent
->in_try_scope
= true;
495 ent
->in_catch_scope
= true;
498 ent
->in_omp_scope
= true;
506 struct named_label_use_entry
*use
;
508 for (use
= ent
->uses
; use
; use
= use
->next
)
509 if (use
->binding_level
== bl
)
511 use
->binding_level
= obl
;
512 use
->names_in_scope
= obl
->names
;
513 if (bl
->kind
== sk_omp
)
514 use
->in_omp_scope
= true;
521 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
522 when errors were reported, except for -Werror-unused-but-set-*. */
523 static int unused_but_set_errorcount
;
525 /* Exit a binding level.
526 Pop the level off, and restore the state of the identifier-decl mappings
527 that were in effect when this level was entered.
529 If KEEP == 1, this level had explicit declarations, so
530 and create a "block" (a BLOCK node) for the level
531 to record its declarations and subblocks for symbol table output.
533 If FUNCTIONBODY is nonzero, this level is the body of a function,
534 so create a block as if KEEP were set and also clear out all
537 If REVERSE is nonzero, reverse the order of decls before putting
538 them into the BLOCK. */
541 poplevel (int keep
, int reverse
, int functionbody
)
544 /* The chain of decls was accumulated in reverse order.
545 Put it into forward order, just for cleanliness. */
550 int leaving_for_scope
;
553 cp_label_binding
*label_bind
;
555 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
560 gcc_assert (current_binding_level
->kind
!= sk_class
);
562 if (current_binding_level
->kind
== sk_cleanup
)
564 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
566 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
568 /* We used to use KEEP == 2 to indicate that the new block should go
569 at the beginning of the list of blocks at this binding level,
570 rather than the end. This hack is no longer used. */
571 gcc_assert (keep
== 0 || keep
== 1);
573 if (current_binding_level
->keep
)
576 /* Any uses of undefined labels, and any defined labels, now operate
577 under constraints of next binding contour. */
578 if (cfun
&& !functionbody
&& named_labels
)
579 htab_traverse (named_labels
, poplevel_named_label_1
,
580 current_binding_level
);
582 /* Get the decls in the order they were written.
583 Usually current_binding_level->names is in reverse order.
584 But parameter decls were previously put in forward order. */
587 current_binding_level
->names
588 = decls
= nreverse (current_binding_level
->names
);
590 decls
= current_binding_level
->names
;
592 /* If there were any declarations or structure tags in that level,
593 or if this level is a function body,
594 create a BLOCK to record them for the life of this function. */
596 if (keep
== 1 || functionbody
)
597 block
= make_node (BLOCK
);
598 if (block
!= NULL_TREE
)
600 BLOCK_VARS (block
) = decls
;
601 BLOCK_SUBBLOCKS (block
) = subblocks
;
604 /* In each subblock, record that this is its superior. */
606 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
607 BLOCK_SUPERCONTEXT (link
) = block
;
609 /* We still support the old for-scope rules, whereby the variables
610 in a for-init statement were in scope after the for-statement
611 ended. We only use the new rules if flag_new_for_scope is
614 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
616 /* Before we remove the declarations first check for unused variables. */
617 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
618 && !processing_template_decl
)
619 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
621 /* There are cases where D itself is a TREE_LIST. See in
622 push_local_binding where the list of decls returned by
623 getdecls is built. */
624 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
626 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
627 && ! DECL_IN_SYSTEM_HEADER (decl
)
628 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
629 && TREE_TYPE (decl
) != error_mark_node
630 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
631 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
633 if (! TREE_USED (decl
))
634 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
635 else if (DECL_CONTEXT (decl
) == current_function_decl
636 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
637 && errorcount
== unused_but_set_errorcount
)
639 warning (OPT_Wunused_but_set_variable
,
640 "variable %q+D set but not used", decl
);
641 unused_but_set_errorcount
= errorcount
;
646 /* Remove declarations for all the DECLs in this level. */
647 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
649 if (leaving_for_scope
&& VAR_P (link
)
650 /* It's hard to make this ARM compatibility hack play nicely with
651 lambdas, and it really isn't necessary in C++11 mode. */
652 && cxx_dialect
< cxx0x
655 tree name
= DECL_NAME (link
);
659 ob
= outer_binding (name
,
660 IDENTIFIER_BINDING (name
),
663 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
665 ns_binding
= NULL_TREE
;
667 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
668 /* We have something like:
673 and we are leaving the `for' scope. There's no reason to
674 keep the binding of the inner `i' in this case. */
675 pop_binding (name
, link
);
676 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
677 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
678 /* Here, we have something like:
686 We must pop the for-scope binding so we know what's a
687 type and what isn't. */
688 pop_binding (name
, link
);
691 /* Mark this VAR_DECL as dead so that we can tell we left it
692 there only for backward compatibility. */
693 DECL_DEAD_FOR_LOCAL (link
) = 1;
695 /* Keep track of what should have happened when we
696 popped the binding. */
699 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
700 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
703 /* Add it to the list of dead variables in the next
704 outermost binding to that we can remove these when we
705 leave that binding. */
707 current_binding_level
->level_chain
->dead_vars_from_for
,
710 /* Although we don't pop the cxx_binding, we do clear
711 its SCOPE since the scope is going away now. */
712 IDENTIFIER_BINDING (name
)->scope
713 = current_binding_level
->level_chain
;
720 /* Remove the binding. */
723 if (TREE_CODE (decl
) == TREE_LIST
)
724 decl
= TREE_VALUE (decl
);
727 if (TREE_CODE (name
) == OVERLOAD
)
728 name
= OVL_FUNCTION (name
);
730 gcc_assert (DECL_P (name
));
731 pop_binding (DECL_NAME (name
), decl
);
735 /* Remove declarations for any `for' variables from inner scopes
736 that we kept around. */
737 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
739 pop_binding (DECL_NAME (decl
), decl
);
741 /* Restore the IDENTIFIER_TYPE_VALUEs. */
742 for (link
= current_binding_level
->type_shadowed
;
743 link
; link
= TREE_CHAIN (link
))
744 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
746 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
747 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
749 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
751 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
752 list if a `using' declaration put them there. The debugging
753 back ends won't understand OVERLOAD, so we remove them here.
754 Because the BLOCK_VARS are (temporarily) shared with
755 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
756 popped all the bindings. */
761 for (d
= &BLOCK_VARS (block
); *d
; )
763 if (TREE_CODE (*d
) == TREE_LIST
)
764 *d
= TREE_CHAIN (*d
);
766 d
= &DECL_CHAIN (*d
);
770 /* If the level being exited is the top level of a function,
771 check over all the labels. */
774 /* Since this is the top level block of a function, the vars are
775 the function's parameters. Don't leave them in the BLOCK
776 because they are found in the FUNCTION_DECL instead. */
777 BLOCK_VARS (block
) = 0;
781 kind
= current_binding_level
->kind
;
782 if (kind
== sk_cleanup
)
786 /* If this is a temporary binding created for a cleanup, then we'll
787 have pushed a statement list level. Pop that, create a new
788 BIND_EXPR for the block, and insert it into the stream. */
789 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
790 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
797 /* The current function is being defined, so its DECL_INITIAL
798 should be error_mark_node. */
799 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
800 DECL_INITIAL (current_function_decl
) = block
;
803 current_binding_level
->blocks
804 = block_chainon (current_binding_level
->blocks
, block
);
806 /* If we did not make a block for the level just exited,
807 any blocks made for inner levels
808 (since they cannot be recorded as subblocks in that level)
809 must be carried forward so they will later become subblocks
810 of something else. */
812 current_binding_level
->blocks
813 = block_chainon (current_binding_level
->blocks
, subblocks
);
815 /* Each and every BLOCK node created here in `poplevel' is important
816 (e.g. for proper debugging information) so if we created one
817 earlier, mark it as "used". */
819 TREE_USED (block
) = 1;
821 /* All temporary bindings created for cleanups are popped silently. */
822 if (kind
== sk_cleanup
)
825 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
829 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
830 itself, calling F for each. The DATA is passed to F as well. */
833 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
836 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
838 result
|= (*f
) (name_space
, data
);
840 for (; current
; current
= DECL_CHAIN (current
))
841 result
|= walk_namespaces_r (current
, f
, data
);
846 /* Walk all the namespaces, calling F for each. The DATA is passed to
850 walk_namespaces (walk_namespaces_fn f
, void* data
)
852 return walk_namespaces_r (global_namespace
, f
, data
);
855 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
856 DATA is non-NULL, this is the last time we will call
857 wrapup_global_declarations for this NAMESPACE. */
860 wrapup_globals_for_namespace (tree name_space
, void* data
)
862 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
863 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
864 tree
*vec
= statics
->address ();
865 int len
= statics
->length ();
866 int last_time
= (data
!= 0);
870 check_global_declarations (vec
, len
);
871 emit_debug_global_declarations (vec
, len
);
875 /* Write out any globals that need to be output. */
876 return wrapup_global_declarations (vec
, len
);
880 /* In C++, you don't have to write `struct S' to refer to `S'; you
881 can just use `S'. We accomplish this by creating a TYPE_DECL as
882 if the user had written `typedef struct S S'. Create and return
883 the TYPE_DECL for TYPE. */
886 create_implicit_typedef (tree name
, tree type
)
890 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
891 DECL_ARTIFICIAL (decl
) = 1;
892 /* There are other implicit type declarations, like the one *within*
893 a class that allows you to write `S::S'. We must distinguish
895 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
896 TYPE_NAME (type
) = decl
;
897 TYPE_STUB_DECL (type
) = decl
;
902 /* Remember a local name for name-mangling purposes. */
905 push_local_name (tree decl
)
910 timevar_start (TV_NAME_LOOKUP
);
912 name
= DECL_NAME (decl
);
914 nelts
= vec_safe_length (local_names
);
915 for (i
= 0; i
< nelts
; i
++)
917 t
= (*local_names
)[i
];
918 if (DECL_NAME (t
) == name
)
920 if (!DECL_LANG_SPECIFIC (decl
))
921 retrofit_lang_decl (decl
);
922 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
923 if (DECL_DISCRIMINATOR_SET_P (t
))
924 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
926 DECL_DISCRIMINATOR (decl
) = 1;
928 (*local_names
)[i
] = decl
;
929 timevar_stop (TV_NAME_LOOKUP
);
934 vec_safe_push (local_names
, decl
);
935 timevar_stop (TV_NAME_LOOKUP
);
938 /* Subroutine of duplicate_decls: return truthvalue of whether
939 or not types of these decls match.
941 For C++, we must compare the parameter list so that `int' can match
942 `int&' in a parameter position, but `int&' is not confused with
946 decls_match (tree newdecl
, tree olddecl
)
950 if (newdecl
== olddecl
)
953 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
954 /* If the two DECLs are not even the same kind of thing, we're not
955 interested in their types. */
958 gcc_assert (DECL_P (newdecl
));
960 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
962 tree f1
= TREE_TYPE (newdecl
);
963 tree f2
= TREE_TYPE (olddecl
);
964 tree p1
= TYPE_ARG_TYPES (f1
);
965 tree p2
= TYPE_ARG_TYPES (f2
);
968 /* Specializations of different templates are different functions
969 even if they have the same type. */
970 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
971 ? DECL_TI_TEMPLATE (newdecl
)
973 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
974 ? DECL_TI_TEMPLATE (olddecl
)
979 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
980 && ! (DECL_EXTERN_C_P (newdecl
)
981 && DECL_EXTERN_C_P (olddecl
)))
984 /* A new declaration doesn't match a built-in one unless it
985 is also extern "C". */
986 if (DECL_IS_BUILTIN (olddecl
)
987 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
990 if (TREE_CODE (f1
) != TREE_CODE (f2
))
993 /* A declaration with deduced return type should use its pre-deduction
994 type for declaration matching. */
995 r2
= fndecl_declared_return_type (olddecl
);
997 if (same_type_p (TREE_TYPE (f1
), r2
))
999 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1000 && (DECL_BUILT_IN (olddecl
)
1001 #ifndef NO_IMPLICIT_EXTERN_C
1002 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1003 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1007 types_match
= self_promoting_args_p (p1
);
1008 if (p1
== void_list_node
)
1009 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1011 #ifndef NO_IMPLICIT_EXTERN_C
1012 else if (!prototype_p (f1
)
1013 && (DECL_EXTERN_C_P (olddecl
)
1014 && DECL_IN_SYSTEM_HEADER (olddecl
)
1015 && !DECL_CLASS_SCOPE_P (olddecl
))
1016 && (DECL_EXTERN_C_P (newdecl
)
1017 && DECL_IN_SYSTEM_HEADER (newdecl
)
1018 && !DECL_CLASS_SCOPE_P (newdecl
)))
1020 types_match
= self_promoting_args_p (p2
);
1021 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1027 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1028 || comp_type_attributes (TREE_TYPE (newdecl
),
1029 TREE_TYPE (olddecl
)) != 0);
1034 /* The decls dont match if they correspond to two different versions
1035 of the same function. Disallow extern "C" functions to be
1036 versions for now. */
1038 && !DECL_EXTERN_C_P (newdecl
)
1039 && !DECL_EXTERN_C_P (olddecl
)
1040 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1042 /* Mark functions as versions if necessary. Modify the mangled decl
1043 name if necessary. */
1044 if (DECL_FUNCTION_VERSIONED (newdecl
)
1045 && DECL_FUNCTION_VERSIONED (olddecl
))
1047 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1049 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1050 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1051 mangle_decl (newdecl
);
1053 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1055 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1056 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1057 mangle_decl (olddecl
);
1059 record_function_versions (olddecl
, newdecl
);
1063 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1065 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1066 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1069 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1070 DECL_TEMPLATE_PARMS (olddecl
)))
1073 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1074 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1075 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1077 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1078 DECL_TEMPLATE_RESULT (newdecl
));
1082 /* Need to check scope for variable declaration (VAR_DECL).
1083 For typedef (TYPE_DECL), scope is ignored. */
1085 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1087 Two declarations for an object with C language linkage
1088 with the same name (ignoring the namespace that qualify
1089 it) that appear in different namespace scopes refer to
1091 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1094 if (TREE_TYPE (newdecl
) == error_mark_node
)
1095 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1096 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1097 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1098 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1101 types_match
= comptypes (TREE_TYPE (newdecl
),
1102 TREE_TYPE (olddecl
),
1103 COMPARE_REDECLARATION
);
1109 /* If NEWDECL is `static' and an `extern' was seen previously,
1110 warn about it. OLDDECL is the previous declaration.
1112 Note that this does not apply to the C++ case of declaring
1113 a variable `extern const' and then later `const'.
1115 Don't complain about built-in functions, since they are beyond
1116 the user's control. */
1119 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1121 if (TREE_CODE (newdecl
) == TYPE_DECL
1122 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1123 || TREE_CODE (newdecl
) == CONST_DECL
1124 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1127 /* Don't get confused by static member functions; that's a different
1129 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1130 && DECL_STATIC_FUNCTION_P (newdecl
))
1133 /* If the old declaration was `static', or the new one isn't, then
1134 everything is OK. */
1135 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1138 /* It's OK to declare a builtin function as `static'. */
1139 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1140 && DECL_ARTIFICIAL (olddecl
))
1143 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1144 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1147 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1148 function templates. If their exception specifications do not
1149 match, issue a diagnostic. */
1152 check_redeclaration_exception_specification (tree new_decl
,
1157 tree new_exceptions
;
1158 tree old_exceptions
;
1160 new_type
= TREE_TYPE (new_decl
);
1161 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1162 old_type
= TREE_TYPE (old_decl
);
1163 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1167 If any declaration of a function has an exception-specification,
1168 all declarations, including the definition and an explicit
1169 specialization, of that function shall have an
1170 exception-specification with the same set of type-ids. */
1171 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1172 && ! DECL_IS_BUILTIN (old_decl
)
1174 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1176 error ("declaration of %qF has a different exception specifier",
1178 error ("from previous declaration %q+F", old_decl
);
1182 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1183 Otherwise issue diagnostics. */
1186 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1188 old_decl
= STRIP_TEMPLATE (old_decl
);
1189 new_decl
= STRIP_TEMPLATE (new_decl
);
1190 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1191 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1193 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1194 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1196 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1198 if (DECL_BUILT_IN (old_decl
))
1200 /* Hide a built-in declaration. */
1201 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1202 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1205 /* 7.1.5 [dcl.constexpr]
1206 Note: An explicit specialization can differ from the template
1207 declaration with respect to the constexpr specifier. */
1208 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1209 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1212 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1213 error ("from previous declaration %q+D", old_decl
);
1217 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1218 && lookup_attribute ("gnu_inline", \
1219 DECL_ATTRIBUTES (fn)))
1221 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1222 If the redeclaration is invalid, a diagnostic is issued, and the
1223 error_mark_node is returned. Otherwise, OLDDECL is returned.
1225 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1228 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1231 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1233 unsigned olddecl_uid
= DECL_UID (olddecl
);
1234 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1235 int new_defines_function
= 0;
1236 tree new_template_info
;
1238 if (newdecl
== olddecl
)
1241 types_match
= decls_match (newdecl
, olddecl
);
1243 /* If either the type of the new decl or the type of the old decl is an
1244 error_mark_node, then that implies that we have already issued an
1245 error (earlier) for some bogus type specification, and in that case,
1246 it is rather pointless to harass the user with yet more error message
1247 about the same declaration, so just pretend the types match here. */
1248 if (TREE_TYPE (newdecl
) == error_mark_node
1249 || TREE_TYPE (olddecl
) == error_mark_node
)
1250 return error_mark_node
;
1252 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1253 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1255 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1256 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1257 && check_raw_literal_operator (olddecl
))
1258 error ("literal operator template %q+D conflicts with"
1259 " raw literal operator %qD", newdecl
, olddecl
);
1260 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1261 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1262 && check_raw_literal_operator (newdecl
))
1263 error ("raw literal operator %q+D conflicts with"
1264 " literal operator template %qD", newdecl
, olddecl
);
1267 if (DECL_P (olddecl
)
1268 && TREE_CODE (newdecl
) == FUNCTION_DECL
1269 && TREE_CODE (olddecl
) == FUNCTION_DECL
1270 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1272 if (DECL_DECLARED_INLINE_P (newdecl
)
1273 && DECL_UNINLINABLE (newdecl
)
1274 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1275 /* Already warned elsewhere. */;
1276 else if (DECL_DECLARED_INLINE_P (olddecl
)
1277 && DECL_UNINLINABLE (olddecl
)
1278 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1279 /* Already warned. */;
1280 else if (DECL_DECLARED_INLINE_P (newdecl
)
1281 && DECL_UNINLINABLE (olddecl
)
1282 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1284 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1286 warning (OPT_Wattributes
, "previous declaration of %q+D "
1287 "with attribute noinline", olddecl
);
1289 else if (DECL_DECLARED_INLINE_P (olddecl
)
1290 && DECL_UNINLINABLE (newdecl
)
1291 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1293 warning (OPT_Wattributes
, "function %q+D redeclared with "
1294 "attribute noinline", newdecl
);
1295 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1300 /* Check for redeclaration and other discrepancies. */
1301 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1302 && DECL_ARTIFICIAL (olddecl
))
1304 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1305 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1307 /* Avoid warnings redeclaring built-ins which have not been
1308 explicitly declared. */
1309 if (DECL_ANTICIPATED (olddecl
))
1312 /* If you declare a built-in or predefined function name as static,
1313 the old definition is overridden, but optionally warn this was a
1314 bad choice of name. */
1315 if (! TREE_PUBLIC (newdecl
))
1317 warning (OPT_Wshadow
,
1318 DECL_BUILT_IN (olddecl
)
1319 ? G_("shadowing built-in function %q#D")
1320 : G_("shadowing library function %q#D"), olddecl
);
1321 /* Discard the old built-in function. */
1324 /* If the built-in is not ansi, then programs can override
1325 it even globally without an error. */
1326 else if (! DECL_BUILT_IN (olddecl
))
1327 warning (0, "library function %q#D redeclared as non-function %q#D",
1331 error ("declaration of %q#D", newdecl
);
1332 error ("conflicts with built-in declaration %q#D",
1337 else if (!types_match
)
1339 /* Avoid warnings redeclaring built-ins which have not been
1340 explicitly declared. */
1341 if (DECL_ANTICIPATED (olddecl
))
1343 /* Deal with fileptr_type_node. FILE type is not known
1344 at the time we create the builtins. */
1347 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1348 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1350 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1353 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1355 tree t
= TREE_VALUE (t1
);
1358 && TYPE_NAME (TREE_TYPE (t
))
1359 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1360 == get_identifier ("FILE")
1361 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1363 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1365 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1366 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1367 types_match
= decls_match (newdecl
, olddecl
);
1369 return duplicate_decls (newdecl
, olddecl
,
1371 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1374 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1377 else if ((DECL_EXTERN_C_P (newdecl
)
1378 && DECL_EXTERN_C_P (olddecl
))
1379 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1380 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1382 /* A near match; override the builtin. */
1384 if (TREE_PUBLIC (newdecl
))
1386 warning (0, "new declaration %q#D", newdecl
);
1387 warning (0, "ambiguates built-in declaration %q#D",
1391 warning (OPT_Wshadow
,
1392 DECL_BUILT_IN (olddecl
)
1393 ? G_("shadowing built-in function %q#D")
1394 : G_("shadowing library function %q#D"), olddecl
);
1397 /* Discard the old built-in function. */
1400 /* Replace the old RTL to avoid problems with inlining. */
1401 COPY_DECL_RTL (newdecl
, olddecl
);
1403 /* Even if the types match, prefer the new declarations type for
1404 built-ins which have not been explicitly declared, for
1405 exception lists, etc... */
1406 else if (DECL_IS_BUILTIN (olddecl
))
1408 tree type
= TREE_TYPE (newdecl
);
1409 tree attribs
= (*targetm
.merge_type_attributes
)
1410 (TREE_TYPE (olddecl
), type
);
1412 type
= cp_build_type_attribute_variant (type
, attribs
);
1413 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1416 /* If a function is explicitly declared "throw ()", propagate that to
1417 the corresponding builtin. */
1418 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1419 && DECL_ANTICIPATED (olddecl
)
1420 && TREE_NOTHROW (newdecl
)
1421 && !TREE_NOTHROW (olddecl
))
1423 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1424 tree tmpdecl
= builtin_decl_explicit (fncode
);
1425 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1426 TREE_NOTHROW (tmpdecl
) = 1;
1429 /* Whether or not the builtin can throw exceptions has no
1430 bearing on this declarator. */
1431 TREE_NOTHROW (olddecl
) = 0;
1433 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1435 /* If a builtin function is redeclared as `static', merge
1436 the declarations, but make the original one static. */
1437 DECL_THIS_STATIC (olddecl
) = 1;
1438 TREE_PUBLIC (olddecl
) = 0;
1440 /* Make the old declaration consistent with the new one so
1441 that all remnants of the builtin-ness of this function
1442 will be banished. */
1443 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1444 COPY_DECL_RTL (newdecl
, olddecl
);
1447 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1449 /* C++ Standard, 3.3, clause 4:
1450 "[Note: a namespace name or a class template name must be unique
1451 in its declarative region (7.3.2, clause 14). ]" */
1452 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1453 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1454 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1455 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1456 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1457 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1459 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1460 && TREE_CODE (newdecl
) != TYPE_DECL
)
1461 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1462 && TREE_CODE (olddecl
) != TYPE_DECL
))
1464 /* We do nothing special here, because C++ does such nasty
1465 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1466 get shadowed, and know that if we need to find a TYPE_DECL
1467 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1468 slot of the identifier. */
1472 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1473 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1474 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1475 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1479 error ("%q#D redeclared as different kind of symbol", newdecl
);
1480 if (TREE_CODE (olddecl
) == TREE_LIST
)
1481 olddecl
= TREE_VALUE (olddecl
);
1482 error ("previous declaration of %q+#D", olddecl
);
1484 return error_mark_node
;
1486 else if (!types_match
)
1488 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1489 /* These are certainly not duplicate declarations; they're
1490 from different scopes. */
1493 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1495 /* The name of a class template may not be declared to refer to
1496 any other template, class, function, object, namespace, value,
1497 or type in the same scope. */
1498 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1499 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1501 error ("declaration of template %q#D", newdecl
);
1502 error ("conflicts with previous declaration %q+#D", olddecl
);
1503 return error_mark_node
;
1505 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1506 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1507 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1508 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1509 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1510 DECL_TEMPLATE_PARMS (olddecl
))
1511 /* Template functions can be disambiguated by
1513 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1514 TREE_TYPE (TREE_TYPE (olddecl
))))
1516 error ("new declaration %q#D", newdecl
);
1517 error ("ambiguates old declaration %q+#D", olddecl
);
1521 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1523 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1525 error ("declaration of C function %q#D conflicts with",
1527 error ("previous declaration %q+#D here", olddecl
);
1530 /* For function versions, params and types match, but they
1531 are not ambiguous. */
1532 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1533 && !DECL_FUNCTION_VERSIONED (olddecl
))
1534 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1535 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1537 error ("new declaration %q#D", newdecl
);
1538 error ("ambiguates old declaration %q+#D", olddecl
);
1539 return error_mark_node
;
1546 error ("conflicting declaration %q#D", newdecl
);
1547 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1548 return error_mark_node
;
1551 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1552 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1553 && (!DECL_TEMPLATE_INFO (newdecl
)
1554 || (DECL_TI_TEMPLATE (newdecl
)
1555 != DECL_TI_TEMPLATE (olddecl
))))
1556 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1557 && (!DECL_TEMPLATE_INFO (olddecl
)
1558 || (DECL_TI_TEMPLATE (olddecl
)
1559 != DECL_TI_TEMPLATE (newdecl
))))))
1560 /* It's OK to have a template specialization and a non-template
1561 with the same type, or to have specializations of two
1562 different templates with the same type. Note that if one is a
1563 specialization, and the other is an instantiation of the same
1564 template, that we do not exit at this point. That situation
1565 can occur if we instantiate a template class, and then
1566 specialize one of its methods. This situation is valid, but
1567 the declarations must be merged in the usual way. */
1569 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1570 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1571 && !DECL_USE_TEMPLATE (newdecl
))
1572 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1573 && !DECL_USE_TEMPLATE (olddecl
))))
1574 /* One of the declarations is a template instantiation, and the
1575 other is not a template at all. That's OK. */
1577 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1579 /* In [namespace.alias] we have:
1581 In a declarative region, a namespace-alias-definition can be
1582 used to redefine a namespace-alias declared in that declarative
1583 region to refer only to the namespace to which it already
1586 Therefore, if we encounter a second alias directive for the same
1587 alias, we can just ignore the second directive. */
1588 if (DECL_NAMESPACE_ALIAS (newdecl
)
1589 && (DECL_NAMESPACE_ALIAS (newdecl
)
1590 == DECL_NAMESPACE_ALIAS (olddecl
)))
1592 /* [namespace.alias]
1594 A namespace-name or namespace-alias shall not be declared as
1595 the name of any other entity in the same declarative region.
1596 A namespace-name defined at global scope shall not be
1597 declared as the name of any other entity in any global scope
1599 error ("declaration of namespace %qD conflicts with", newdecl
);
1600 error ("previous declaration of namespace %q+D here", olddecl
);
1601 return error_mark_node
;
1605 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1608 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1609 if (DECL_NAME (olddecl
) != NULL_TREE
)
1610 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1611 ? G_("%q+#D previously defined here")
1612 : G_("%q+#D previously declared here"), olddecl
);
1613 return error_mark_node
;
1615 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1616 && DECL_INITIAL (olddecl
) != NULL_TREE
1617 && !prototype_p (TREE_TYPE (olddecl
))
1618 && prototype_p (TREE_TYPE (newdecl
)))
1620 /* Prototype decl follows defn w/o prototype. */
1621 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1622 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1623 "follows non-prototype definition here");
1625 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1626 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1629 If two declarations of the same function or object
1630 specify different linkage-specifications ..., the program
1631 is ill-formed.... Except for functions with C++ linkage,
1632 a function declaration without a linkage specification
1633 shall not precede the first linkage specification for
1634 that function. A function can be declared without a
1635 linkage specification after an explicit linkage
1636 specification has been seen; the linkage explicitly
1637 specified in the earlier declaration is not affected by
1638 such a function declaration.
1640 DR 563 raises the question why the restrictions on
1641 functions should not also apply to objects. Older
1642 versions of G++ silently ignore the linkage-specification
1650 which is clearly wrong. Therefore, we now treat objects
1652 if (current_lang_depth () == 0)
1654 /* There is no explicit linkage-specification, so we use
1655 the linkage from the previous declaration. */
1656 if (!DECL_LANG_SPECIFIC (newdecl
))
1657 retrofit_lang_decl (newdecl
);
1658 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1662 error ("previous declaration of %q+#D with %qL linkage",
1663 olddecl
, DECL_LANGUAGE (olddecl
));
1664 error ("conflicts with new declaration with %qL linkage",
1665 DECL_LANGUAGE (newdecl
));
1669 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1671 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1673 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1674 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1677 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1678 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1680 for (; t1
&& t1
!= void_list_node
;
1681 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1682 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1684 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1687 permerror (input_location
, "default argument given for parameter %d of %q#D",
1689 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1693 error ("default argument given for parameter %d of %q#D",
1695 error ("after previous specification in %q+#D",
1702 /* Do not merge an implicit typedef with an explicit one. In:
1706 typedef class A A __attribute__ ((foo));
1708 the attribute should apply only to the typedef. */
1709 if (TREE_CODE (olddecl
) == TYPE_DECL
1710 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1711 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1714 /* If new decl is `static' and an `extern' was seen previously,
1716 warn_extern_redeclared_static (newdecl
, olddecl
);
1718 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1719 return error_mark_node
;
1721 /* We have committed to returning 1 at this point. */
1722 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1724 /* Now that functions must hold information normally held
1725 by field decls, there is extra work to do so that
1726 declaration information does not get destroyed during
1728 if (DECL_VINDEX (olddecl
))
1729 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1730 if (DECL_CONTEXT (olddecl
))
1731 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1732 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1733 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1734 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1735 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1736 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1737 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1738 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1739 SET_OVERLOADED_OPERATOR_CODE
1740 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1741 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1743 /* Optionally warn about more than one declaration for the same
1744 name, but don't warn about a function declaration followed by a
1746 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1747 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1748 /* Don't warn about extern decl followed by definition. */
1749 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1750 /* Don't warn about friends, let add_friend take care of it. */
1751 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1752 /* Don't warn about declaration followed by specialization. */
1753 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1754 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1756 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1757 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1760 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1761 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1763 if (DECL_DELETED_FN (newdecl
))
1765 error ("deleted definition of %qD", newdecl
);
1766 error ("after previous declaration %q+D", olddecl
);
1768 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1772 /* Deal with C++: must preserve virtual function table size. */
1773 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1775 tree newtype
= TREE_TYPE (newdecl
);
1776 tree oldtype
= TREE_TYPE (olddecl
);
1778 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1779 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1780 CLASSTYPE_FRIEND_CLASSES (newtype
)
1781 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1783 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1786 /* Copy all the DECL_... slots specified in the new decl
1787 except for any that we copy here from the old type. */
1788 DECL_ATTRIBUTES (newdecl
)
1789 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1791 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1795 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1796 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1797 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1798 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1799 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1800 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1802 DECL_ATTRIBUTES (old_result
)
1803 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1805 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1807 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1808 && DECL_INITIAL (new_result
))
1810 if (DECL_INITIAL (old_result
))
1811 DECL_UNINLINABLE (old_result
) = 1;
1813 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1814 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1815 DECL_NOT_REALLY_EXTERN (old_result
)
1816 = DECL_NOT_REALLY_EXTERN (new_result
);
1817 DECL_INTERFACE_KNOWN (old_result
)
1818 = DECL_INTERFACE_KNOWN (new_result
);
1819 DECL_DECLARED_INLINE_P (old_result
)
1820 = DECL_DECLARED_INLINE_P (new_result
);
1821 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1822 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1827 DECL_DECLARED_INLINE_P (old_result
)
1828 |= DECL_DECLARED_INLINE_P (new_result
);
1829 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1830 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1831 check_redeclaration_exception_specification (newdecl
, olddecl
);
1835 /* If the new declaration is a definition, update the file and
1836 line information on the declaration, and also make
1837 the old declaration the same definition. */
1838 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1840 DECL_SOURCE_LOCATION (olddecl
)
1841 = DECL_SOURCE_LOCATION (old_result
)
1842 = DECL_SOURCE_LOCATION (newdecl
);
1843 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1844 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1847 DECL_ARGUMENTS (old_result
)
1848 = DECL_ARGUMENTS (new_result
);
1849 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1850 parm
= DECL_CHAIN (parm
))
1851 DECL_CONTEXT (parm
) = old_result
;
1860 /* Automatically handles default parameters. */
1861 tree oldtype
= TREE_TYPE (olddecl
);
1864 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1865 maybe_instantiate_noexcept (olddecl
);
1867 /* Merge the data types specified in the two decls. */
1868 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1870 /* If merge_types produces a non-typedef type, just use the old type. */
1871 if (TREE_CODE (newdecl
) == TYPE_DECL
1872 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1875 if (VAR_P (newdecl
))
1877 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1878 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1879 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1880 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1881 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1882 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1884 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1885 if (DECL_LANG_SPECIFIC (olddecl
)
1886 && CP_DECL_THREADPRIVATE_P (olddecl
))
1888 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1889 if (!DECL_LANG_SPECIFIC (newdecl
))
1890 retrofit_lang_decl (newdecl
);
1892 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1893 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1897 /* Do this after calling `merge_types' so that default
1898 parameters don't confuse us. */
1899 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1900 check_redeclaration_exception_specification (newdecl
, olddecl
);
1901 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1903 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1904 check_default_args (newdecl
);
1906 /* Lay the type out, unless already done. */
1907 if (! same_type_p (newtype
, oldtype
)
1908 && TREE_TYPE (newdecl
) != error_mark_node
1909 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1910 layout_type (TREE_TYPE (newdecl
));
1912 if ((VAR_P (newdecl
)
1913 || TREE_CODE (newdecl
) == PARM_DECL
1914 || TREE_CODE (newdecl
) == RESULT_DECL
1915 || TREE_CODE (newdecl
) == FIELD_DECL
1916 || TREE_CODE (newdecl
) == TYPE_DECL
)
1917 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1918 layout_decl (newdecl
, 0);
1920 /* Merge the type qualifiers. */
1921 if (TREE_READONLY (newdecl
))
1922 TREE_READONLY (olddecl
) = 1;
1923 if (TREE_THIS_VOLATILE (newdecl
))
1924 TREE_THIS_VOLATILE (olddecl
) = 1;
1925 if (TREE_NOTHROW (newdecl
))
1926 TREE_NOTHROW (olddecl
) = 1;
1928 /* Merge deprecatedness. */
1929 if (TREE_DEPRECATED (newdecl
))
1930 TREE_DEPRECATED (olddecl
) = 1;
1932 /* Preserve function specific target and optimization options */
1933 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1935 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1936 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1937 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1938 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1940 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1941 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1942 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1943 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1946 /* Merge the initialization information. */
1947 if (DECL_INITIAL (newdecl
) == NULL_TREE
1948 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1950 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1951 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1952 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1954 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1955 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1959 /* Merge the section attribute.
1960 We want to issue an error if the sections conflict but that must be
1961 done later in decl_attributes since we are called before attributes
1963 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1964 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1966 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1968 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1969 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1970 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1971 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1972 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1973 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1974 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1975 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1976 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1977 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1978 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1979 /* Keep the old RTL. */
1980 COPY_DECL_RTL (olddecl
, newdecl
);
1982 else if (VAR_P (newdecl
)
1983 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1985 /* Keep the old RTL. We cannot keep the old RTL if the old
1986 declaration was for an incomplete object and the new
1987 declaration is not since many attributes of the RTL will
1989 COPY_DECL_RTL (olddecl
, newdecl
);
1992 /* If cannot merge, then use the new type and qualifiers,
1993 and don't preserve the old rtl. */
1996 /* Clean out any memory we had of the old declaration. */
1997 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1999 TREE_VALUE (oldstatic
) = error_mark_node
;
2001 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2002 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2003 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2004 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2007 /* Merge the storage class information. */
2008 merge_weak (newdecl
, olddecl
);
2010 if (DECL_ONE_ONLY (olddecl
))
2011 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2013 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2014 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2015 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2016 if (! DECL_EXTERNAL (olddecl
))
2017 DECL_EXTERNAL (newdecl
) = 0;
2019 new_template_info
= NULL_TREE
;
2020 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2022 bool new_redefines_gnu_inline
= false;
2024 if (new_defines_function
2025 && ((DECL_INTERFACE_KNOWN (olddecl
)
2026 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2027 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2028 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2029 == FUNCTION_DECL
))))
2033 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2034 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2036 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2039 if (!new_redefines_gnu_inline
)
2041 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2042 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2043 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2045 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2046 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2047 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2049 /* If the OLDDECL is an instantiation and/or specialization,
2050 then the NEWDECL must be too. But, it may not yet be marked
2051 as such if the caller has created NEWDECL, but has not yet
2052 figured out that it is a redeclaration. */
2053 if (!DECL_USE_TEMPLATE (newdecl
))
2054 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2056 /* Don't really know how much of the language-specific
2057 values we should copy from old to new. */
2058 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2059 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2060 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2061 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2063 if (LANG_DECL_HAS_MIN (newdecl
))
2065 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2066 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2067 if (DECL_TEMPLATE_INFO (newdecl
))
2068 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2069 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2071 /* Only functions have these fields. */
2072 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2074 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2075 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2076 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2077 && DECL_HIDDEN_FRIEND_P (olddecl
)
2078 && newdecl_is_friend
);
2079 DECL_BEFRIENDING_CLASSES (newdecl
)
2080 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2081 DECL_BEFRIENDING_CLASSES (olddecl
));
2082 /* DECL_THUNKS is only valid for virtual functions,
2083 otherwise it is a DECL_FRIEND_CONTEXT. */
2084 if (DECL_VIRTUAL_P (newdecl
))
2085 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2087 /* Only variables have this field. */
2088 else if (VAR_P (newdecl
)
2089 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2090 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2093 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2097 /* Merge parameter attributes. */
2098 tree oldarg
, newarg
;
2099 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2100 newarg
= DECL_ARGUMENTS(newdecl
);
2102 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2103 DECL_ATTRIBUTES (newarg
)
2104 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2105 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2108 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2109 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2111 /* If newdecl is not a specialization, then it is not a
2112 template-related function at all. And that means that we
2113 should have exited above, returning 0. */
2114 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2116 if (DECL_ODR_USED (olddecl
))
2117 /* From [temp.expl.spec]:
2119 If a template, a member template or the member of a class
2120 template is explicitly specialized then that
2121 specialization shall be declared before the first use of
2122 that specialization that would cause an implicit
2123 instantiation to take place, in every translation unit in
2124 which such a use occurs. */
2125 error ("explicit specialization of %qD after first use",
2128 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2130 /* Don't propagate visibility from the template to the
2131 specialization here. We'll do that in determine_visibility if
2133 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2135 /* [temp.expl.spec/14] We don't inline explicit specialization
2136 just because the primary template says so. */
2138 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2139 the always_inline attribute. */
2140 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2141 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2143 if (DECL_DECLARED_INLINE_P (newdecl
))
2144 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2146 DECL_ATTRIBUTES (newdecl
)
2147 = remove_attribute ("always_inline",
2148 DECL_ATTRIBUTES (newdecl
));
2151 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2153 /* Never inline re-defined extern inline functions.
2154 FIXME: this could be better handled by keeping both
2155 function as separate declarations. */
2156 DECL_UNINLINABLE (newdecl
) = 1;
2160 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2161 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2163 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2165 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2166 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2168 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2169 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2170 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2171 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2174 /* Preserve abstractness on cloned [cd]tors. */
2175 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2177 /* Update newdecl's parms to point at olddecl. */
2178 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2179 parm
= DECL_CHAIN (parm
))
2180 DECL_CONTEXT (parm
) = olddecl
;
2184 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2185 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2186 COPY_DECL_RTL (newdecl
, olddecl
);
2188 if (! types_match
|| new_defines_function
)
2190 /* These need to be copied so that the names are available.
2191 Note that if the types do match, we'll preserve inline
2192 info and other bits, but if not, we won't. */
2193 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2194 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2196 /* If redeclaring a builtin function, it stays built in
2197 if newdecl is a gnu_inline definition, or if newdecl is just
2199 if (DECL_BUILT_IN (olddecl
)
2200 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2202 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2203 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2204 /* If we're keeping the built-in definition, keep the rtl,
2205 regardless of declaration matches. */
2206 COPY_DECL_RTL (olddecl
, newdecl
);
2207 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2209 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2212 /* If a compatible prototype of these builtin functions
2213 is seen, assume the runtime implements it with the
2214 expected semantics. */
2215 case BUILT_IN_STPCPY
:
2216 if (builtin_decl_explicit_p (fncode
))
2217 set_builtin_decl_implicit_p (fncode
, true);
2224 if (new_defines_function
)
2225 /* If defining a function declared with other language
2226 linkage, use the previously declared language linkage. */
2227 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2228 else if (types_match
)
2230 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2231 /* Don't clear out the arguments if we're just redeclaring a
2233 if (DECL_ARGUMENTS (olddecl
))
2234 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2237 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2238 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2240 /* Now preserve various other info from the definition. */
2241 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2242 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2243 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2244 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2246 /* Warn about conflicting visibility specifications. */
2247 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2248 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2249 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2251 warning_at (input_location
, OPT_Wattributes
,
2252 "%q+D: visibility attribute ignored because it", newdecl
);
2253 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2254 "conflicts with previous declaration here");
2256 /* Choose the declaration which specified visibility. */
2257 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2259 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2260 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2262 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2263 so keep this behavior. */
2264 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2266 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2267 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2269 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2270 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2272 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2273 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2275 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2276 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2277 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2279 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2280 with that from NEWDECL below. */
2281 if (DECL_LANG_SPECIFIC (olddecl
))
2283 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2284 != DECL_LANG_SPECIFIC (newdecl
));
2285 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2288 /* Merge the USED information. */
2289 if (TREE_USED (olddecl
))
2290 TREE_USED (newdecl
) = 1;
2291 else if (TREE_USED (newdecl
))
2292 TREE_USED (olddecl
) = 1;
2293 if (VAR_P (newdecl
))
2295 if (DECL_READ_P (olddecl
))
2296 DECL_READ_P (newdecl
) = 1;
2297 else if (DECL_READ_P (newdecl
))
2298 DECL_READ_P (olddecl
) = 1;
2300 if (DECL_PRESERVE_P (olddecl
))
2301 DECL_PRESERVE_P (newdecl
) = 1;
2302 else if (DECL_PRESERVE_P (newdecl
))
2303 DECL_PRESERVE_P (olddecl
) = 1;
2305 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2306 to olddecl and deleted. */
2307 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2308 && DECL_FUNCTION_VERSIONED (olddecl
))
2310 /* Set the flag for newdecl so that it gets copied to olddecl. */
2311 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2312 /* newdecl will be purged after copying to olddecl and is no longer
2314 delete_function_version (newdecl
);
2317 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2321 function_size
= sizeof (struct tree_decl_common
);
2323 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2324 (char *) newdecl
+ sizeof (struct tree_common
),
2325 function_size
- sizeof (struct tree_common
));
2327 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2328 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2329 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2330 if (new_template_info
)
2331 /* If newdecl is a template instantiation, it is possible that
2332 the following sequence of events has occurred:
2334 o A friend function was declared in a class template. The
2335 class template was instantiated.
2337 o The instantiation of the friend declaration was
2338 recorded on the instantiation list, and is newdecl.
2340 o Later, however, instantiate_class_template called pushdecl
2341 on the newdecl to perform name injection. But, pushdecl in
2342 turn called duplicate_decls when it discovered that another
2343 declaration of a global function with the same name already
2346 o Here, in duplicate_decls, we decided to clobber newdecl.
2348 If we're going to do that, we'd better make sure that
2349 olddecl, and not newdecl, is on the list of
2350 instantiations so that if we try to do the instantiation
2351 again we won't get the clobbered declaration. */
2352 reregister_specialization (newdecl
,
2358 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2359 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2360 (char *) newdecl
+ sizeof (struct tree_common
),
2361 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2362 switch (TREE_CODE (olddecl
))
2372 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2373 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2374 size
- sizeof (struct tree_decl_common
)
2375 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2379 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2380 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2381 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2382 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2386 DECL_UID (olddecl
) = olddecl_uid
;
2388 DECL_FRIEND_P (olddecl
) = 1;
2391 DECL_ANTICIPATED (olddecl
) = 1;
2392 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2395 /* NEWDECL contains the merged attribute lists.
2396 Update OLDDECL to be the same. */
2397 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2399 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2400 so that encode_section_info has a chance to look at the new decl
2401 flags and attributes. */
2402 if (DECL_RTL_SET_P (olddecl
)
2403 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2405 && TREE_STATIC (olddecl
))))
2406 make_decl_rtl (olddecl
);
2408 /* The NEWDECL will no longer be needed. Because every out-of-class
2409 declaration of a member results in a call to duplicate_decls,
2410 freeing these nodes represents in a significant savings. */
2416 /* Return zero if the declaration NEWDECL is valid
2417 when the declaration OLDDECL (assumed to be for the same name)
2418 has already been seen.
2419 Otherwise return an error message format string with a %s
2420 where the identifier should go. */
2423 redeclaration_error_message (tree newdecl
, tree olddecl
)
2425 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2427 /* Because C++ can put things into name space for free,
2428 constructs like "typedef struct foo { ... } foo"
2429 would look like an erroneous redeclaration. */
2430 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2433 return G_("redefinition of %q#D");
2435 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2437 /* If this is a pure function, its olddecl will actually be
2438 the original initialization to `0' (which we force to call
2439 abort()). Don't complain about redefinition in this case. */
2440 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2441 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2444 /* If both functions come from different namespaces, this is not
2445 a redeclaration - this is a conflict with a used function. */
2446 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2447 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2448 && ! decls_match (olddecl
, newdecl
))
2449 return G_("%qD conflicts with used function");
2451 /* We'll complain about linkage mismatches in
2452 warn_extern_redeclared_static. */
2454 /* Defining the same name twice is no good. */
2455 if (DECL_INITIAL (olddecl
) != NULL_TREE
2456 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2458 if (DECL_NAME (olddecl
) == NULL_TREE
)
2459 return G_("%q#D not declared in class");
2460 else if (!GNU_INLINE_P (olddecl
)
2461 || GNU_INLINE_P (newdecl
))
2462 return G_("redefinition of %q#D");
2465 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2467 bool olda
= GNU_INLINE_P (olddecl
);
2468 bool newa
= GNU_INLINE_P (newdecl
);
2473 return G_("%q+D redeclared inline with "
2474 "%<gnu_inline%> attribute");
2476 return G_("%q+D redeclared inline without "
2477 "%<gnu_inline%> attribute");
2481 check_abi_tag_redeclaration
2482 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2483 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2487 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2491 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2493 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2494 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2495 return G_("redefinition of %q#D");
2499 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2500 || (DECL_TEMPLATE_RESULT (newdecl
)
2501 == DECL_TEMPLATE_RESULT (olddecl
)))
2504 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2505 if (DECL_TEMPLATE_INFO (nt
))
2506 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2507 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2508 if (DECL_TEMPLATE_INFO (ot
))
2509 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2510 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2511 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2512 return G_("redefinition of %q#D");
2514 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2516 bool olda
= GNU_INLINE_P (ot
);
2517 bool newa
= GNU_INLINE_P (nt
);
2522 return G_("%q+D redeclared inline with "
2523 "%<gnu_inline%> attribute");
2525 return G_("%q+D redeclared inline without "
2526 "%<gnu_inline%> attribute");
2530 /* Core issue #226 (C++0x):
2532 If a friend function template declaration specifies a
2533 default template-argument, that declaration shall be a
2534 definition and shall be the only declaration of the
2535 function template in the translation unit. */
2536 if ((cxx_dialect
!= cxx98
)
2537 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2538 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2539 /*is_primary=*/true,
2540 /*is_partial=*/false,
2541 /*is_friend_decl=*/2))
2542 return G_("redeclaration of friend %q#D "
2543 "may not have default template arguments");
2547 else if (VAR_P (newdecl
)
2548 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2549 && (! DECL_LANG_SPECIFIC (olddecl
)
2550 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2551 || DECL_THREAD_LOCAL_P (newdecl
)))
2553 /* Only variables can be thread-local, and all declarations must
2554 agree on this property. */
2555 if (DECL_THREAD_LOCAL_P (newdecl
))
2556 return G_("thread-local declaration of %q#D follows "
2557 "non-thread-local declaration");
2559 return G_("non-thread-local declaration of %q#D follows "
2560 "thread-local declaration");
2562 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2564 /* The objects have been declared at namespace scope. If either
2565 is a member of an anonymous union, then this is an invalid
2566 redeclaration. For example:
2572 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2573 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2574 return G_("redeclaration of %q#D");
2575 /* If at least one declaration is a reference, there is no
2576 conflict. For example:
2582 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2584 /* Reject two definitions. */
2585 return G_("redefinition of %q#D");
2589 /* Objects declared with block scope: */
2590 /* Reject two definitions, and reject a definition
2591 together with an external reference. */
2592 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2593 return G_("redeclaration of %q#D");
2598 /* Hash and equality functions for the named_label table. */
2601 named_label_entry_hash (const void *data
)
2603 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2604 return DECL_UID (ent
->label_decl
);
2608 named_label_entry_eq (const void *a
, const void *b
)
2610 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2611 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2612 return ent_a
->label_decl
== ent_b
->label_decl
;
2615 /* Create a new label, named ID. */
2618 make_label_decl (tree id
, int local_p
)
2620 struct named_label_entry
*ent
;
2624 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2626 DECL_CONTEXT (decl
) = current_function_decl
;
2627 DECL_MODE (decl
) = VOIDmode
;
2628 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2630 /* Say where one reference is to the label, for the sake of the
2631 error if it is not defined. */
2632 DECL_SOURCE_LOCATION (decl
) = input_location
;
2634 /* Record the fact that this identifier is bound to this label. */
2635 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2637 /* Create the label htab for the function on demand. */
2639 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2640 named_label_entry_eq
, NULL
);
2642 /* Record this label on the list of labels used in this function.
2643 We do this before calling make_label_decl so that we get the
2644 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2645 ent
= ggc_alloc_cleared_named_label_entry ();
2646 ent
->label_decl
= decl
;
2648 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2649 gcc_assert (*slot
== NULL
);
2655 /* Look for a label named ID in the current function. If one cannot
2656 be found, create one. (We keep track of used, but undefined,
2657 labels, and complain about them at the end of a function.) */
2660 lookup_label_1 (tree id
)
2664 /* You can't use labels at global scope. */
2665 if (current_function_decl
== NULL_TREE
)
2667 error ("label %qE referenced outside of any function", id
);
2671 /* See if we've already got this label. */
2672 decl
= IDENTIFIER_LABEL_VALUE (id
);
2673 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2676 decl
= make_label_decl (id
, /*local_p=*/0);
2680 /* Wrapper for lookup_label_1. */
2683 lookup_label (tree id
)
2686 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2687 ret
= lookup_label_1 (id
);
2688 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2692 /* Declare a local label named ID. */
2695 declare_local_label (tree id
)
2698 cp_label_binding bind
;
2700 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2701 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2702 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2704 decl
= make_label_decl (id
, /*local_p=*/1);
2706 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2711 /* Returns nonzero if it is ill-formed to jump past the declaration of
2712 DECL. Returns 2 if it's also a real problem. */
2715 decl_jump_unsafe (tree decl
)
2717 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2718 with automatic storage duration is not in scope to a point where it is
2719 in scope is ill-formed unless the variable has scalar type, class type
2720 with a trivial default constructor and a trivial destructor, a
2721 cv-qualified version of one of these types, or an array of one of the
2722 preceding types and is declared without an initializer (8.5). */
2723 tree type
= TREE_TYPE (decl
);
2725 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2726 || type
== error_mark_node
)
2729 type
= strip_array_types (type
);
2731 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2734 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2740 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2743 identify_goto (tree decl
, const location_t
*locus
)
2746 permerror (input_location
, "jump to label %qD", decl
);
2748 permerror (input_location
, "jump to case label");
2750 permerror (*locus
, " from here");
2753 /* Check that a single previously seen jump to a newly defined label
2754 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2755 the jump context; NAMES are the names in scope in LEVEL at the jump
2756 context; LOCUS is the source position of the jump or 0. Returns
2757 true if all is well. */
2760 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2761 bool exited_omp
, const location_t
*locus
)
2763 cp_binding_level
*b
;
2764 bool identified
= false, saw_eh
= false, saw_omp
= false;
2768 identify_goto (decl
, locus
);
2769 error (" exits OpenMP structured block");
2770 identified
= saw_omp
= true;
2773 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2775 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2777 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2778 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2779 : TREE_CHAIN (new_decls
)))
2781 int problem
= decl_jump_unsafe (new_decls
);
2787 identify_goto (decl
, locus
);
2791 error (" crosses initialization of %q+#D", new_decls
);
2793 permerror (input_location
, " enters scope of %q+#D which has "
2794 "non-trivial destructor", new_decls
);
2799 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2803 identify_goto (decl
, locus
);
2806 if (b
->kind
== sk_try
)
2807 error (" enters try block");
2809 error (" enters catch block");
2812 if (b
->kind
== sk_omp
&& !saw_omp
)
2816 identify_goto (decl
, locus
);
2819 error (" enters OpenMP structured block");
2828 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2830 check_previous_goto_1 (decl
, use
->binding_level
,
2831 use
->names_in_scope
, use
->in_omp_scope
,
2832 &use
->o_goto_locus
);
2836 check_switch_goto (cp_binding_level
* level
)
2838 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2841 /* Check that a new jump to a label DECL is OK. Called by
2842 finish_goto_stmt. */
2845 check_goto (tree decl
)
2847 struct named_label_entry
*ent
, dummy
;
2848 bool saw_catch
= false, identified
= false;
2852 /* We can't know where a computed goto is jumping.
2853 So we assume that it's OK. */
2854 if (TREE_CODE (decl
) != LABEL_DECL
)
2857 /* We didn't record any information about this label when we created it,
2858 and there's not much point since it's trivial to analyze as a return. */
2859 if (decl
== cdtor_label
)
2862 dummy
.label_decl
= decl
;
2863 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2864 gcc_assert (ent
!= NULL
);
2866 /* If the label hasn't been defined yet, defer checking. */
2867 if (! DECL_INITIAL (decl
))
2869 struct named_label_use_entry
*new_use
;
2871 /* Don't bother creating another use if the last goto had the
2872 same data, and will therefore create the same set of errors. */
2874 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2877 new_use
= ggc_alloc_named_label_use_entry ();
2878 new_use
->binding_level
= current_binding_level
;
2879 new_use
->names_in_scope
= current_binding_level
->names
;
2880 new_use
->o_goto_locus
= input_location
;
2881 new_use
->in_omp_scope
= false;
2883 new_use
->next
= ent
->uses
;
2884 ent
->uses
= new_use
;
2888 if (ent
->in_try_scope
|| ent
->in_catch_scope
2889 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2891 permerror (input_location
, "jump to label %q+D", decl
);
2892 permerror (input_location
, " from here");
2896 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2898 int u
= decl_jump_unsafe (bad
);
2900 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2902 /* Can't skip init of __exception_info. */
2903 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2907 error (" skips initialization of %q+#D", bad
);
2909 permerror (input_location
, " enters scope of %q+#D which has "
2910 "non-trivial destructor", bad
);
2913 if (ent
->in_try_scope
)
2914 error (" enters try block");
2915 else if (ent
->in_catch_scope
&& !saw_catch
)
2916 error (" enters catch block");
2918 if (ent
->in_omp_scope
)
2919 error (" enters OpenMP structured block");
2920 else if (flag_openmp
)
2922 cp_binding_level
*b
;
2923 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2925 if (b
== ent
->binding_level
)
2927 if (b
->kind
== sk_omp
)
2931 permerror (input_location
, "jump to label %q+D", decl
);
2932 permerror (input_location
, " from here");
2935 error (" exits OpenMP structured block");
2942 /* Check that a return is ok wrt OpenMP structured blocks.
2943 Called by finish_return_stmt. Returns true if all is well. */
2946 check_omp_return (void)
2948 cp_binding_level
*b
;
2949 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2950 if (b
->kind
== sk_omp
)
2952 error ("invalid exit from OpenMP structured block");
2955 else if (b
->kind
== sk_function_parms
)
2960 /* Define a label, specifying the location in the source file.
2961 Return the LABEL_DECL node for the label. */
2964 define_label_1 (location_t location
, tree name
)
2966 struct named_label_entry
*ent
, dummy
;
2967 cp_binding_level
*p
;
2970 decl
= lookup_label (name
);
2972 dummy
.label_decl
= decl
;
2973 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2974 gcc_assert (ent
!= NULL
);
2976 /* After labels, make any new cleanups in the function go into their
2977 own new (temporary) binding contour. */
2978 for (p
= current_binding_level
;
2979 p
->kind
!= sk_function_parms
;
2981 p
->more_cleanups_ok
= 0;
2983 if (name
== get_identifier ("wchar_t"))
2984 permerror (input_location
, "label named wchar_t");
2986 if (DECL_INITIAL (decl
) != NULL_TREE
)
2988 error ("duplicate label %qD", decl
);
2989 return error_mark_node
;
2993 struct named_label_use_entry
*use
;
2995 /* Mark label as having been defined. */
2996 DECL_INITIAL (decl
) = error_mark_node
;
2997 /* Say where in the source. */
2998 DECL_SOURCE_LOCATION (decl
) = location
;
3000 ent
->binding_level
= current_binding_level
;
3001 ent
->names_in_scope
= current_binding_level
->names
;
3003 for (use
= ent
->uses
; use
; use
= use
->next
)
3004 check_previous_goto (decl
, use
);
3011 /* Wrapper for define_label_1. */
3014 define_label (location_t location
, tree name
)
3017 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3018 ret
= define_label_1 (location
, name
);
3019 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3026 cp_binding_level
*level
;
3027 struct cp_switch
*next
;
3028 /* The SWITCH_STMT being built. */
3030 /* A splay-tree mapping the low element of a case range to the high
3031 element, or NULL_TREE if there is no high element. Used to
3032 determine whether or not a new case label duplicates an old case
3033 label. We need a tree, rather than simply a hash table, because
3034 of the GNU case range extension. */
3038 /* A stack of the currently active switch statements. The innermost
3039 switch statement is on the top of the stack. There is no need to
3040 mark the stack for garbage collection because it is only active
3041 during the processing of the body of a function, and we never
3042 collect at that point. */
3044 static struct cp_switch
*switch_stack
;
3046 /* Called right after a switch-statement condition is parsed.
3047 SWITCH_STMT is the switch statement being parsed. */
3050 push_switch (tree switch_stmt
)
3052 struct cp_switch
*p
= XNEW (struct cp_switch
);
3053 p
->level
= current_binding_level
;
3054 p
->next
= switch_stack
;
3055 p
->switch_stmt
= switch_stmt
;
3056 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3063 struct cp_switch
*cs
= switch_stack
;
3064 location_t switch_location
;
3066 /* Emit warnings as needed. */
3067 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3068 if (!processing_template_decl
)
3069 c_do_switch_warnings (cs
->cases
, switch_location
,
3070 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3071 SWITCH_STMT_COND (cs
->switch_stmt
));
3073 splay_tree_delete (cs
->cases
);
3074 switch_stack
= switch_stack
->next
;
3078 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3079 condition. Note that if TYPE and VALUE are already integral we don't
3080 really do the conversion because the language-independent
3081 warning/optimization code will work better that way. */
3084 case_conversion (tree type
, tree value
)
3086 if (value
== NULL_TREE
)
3089 if (cxx_dialect
>= cxx0x
3090 && (SCOPED_ENUM_P (type
)
3091 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3093 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3094 type
= type_promotes_to (type
);
3095 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3097 return cxx_constant_value (value
);
3100 /* Note that we've seen a definition of a case label, and complain if this
3101 is a bad place for one. */
3104 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3107 cp_binding_level
*p
;
3110 if (processing_template_decl
)
3114 /* For templates, just add the case label; we'll do semantic
3115 analysis at instantiation-time. */
3116 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3117 return add_stmt (build_case_label (low_value
, high_value
, label
));
3120 /* Find the condition on which this switch statement depends. */
3121 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3122 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3123 cond
= TREE_VALUE (cond
);
3125 if (!check_switch_goto (switch_stack
->level
))
3126 return error_mark_node
;
3128 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3130 low_value
= case_conversion (type
, low_value
);
3131 high_value
= case_conversion (type
, high_value
);
3133 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3134 low_value
, high_value
);
3136 /* After labels, make any new cleanups in the function go into their
3137 own new (temporary) binding contour. */
3138 for (p
= current_binding_level
;
3139 p
->kind
!= sk_function_parms
;
3141 p
->more_cleanups_ok
= 0;
3146 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3149 typename_hash (const void* k
)
3152 const_tree
const t
= (const_tree
) k
;
3154 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3155 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3160 typedef struct typename_info
{
3168 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3169 really of type `typename_info*' */
3172 typename_compare (const void * k1
, const void * k2
)
3174 const_tree
const t1
= (const_tree
) k1
;
3175 const typename_info
*const t2
= (const typename_info
*) k2
;
3177 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3178 && TYPE_CONTEXT (t1
) == t2
->scope
3179 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3180 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3181 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3184 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3185 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3187 Returns the new TYPENAME_TYPE. */
3189 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3192 build_typename_type (tree context
, tree name
, tree fullname
,
3193 enum tag_types tag_type
)
3201 if (typename_htab
== NULL
)
3202 typename_htab
= htab_create_ggc (61, &typename_hash
,
3203 &typename_compare
, NULL
);
3205 ti
.scope
= FROB_CONTEXT (context
);
3207 ti
.template_id
= fullname
;
3208 ti
.enum_p
= tag_type
== enum_type
;
3209 ti
.class_p
= (tag_type
== class_type
3210 || tag_type
== record_type
3211 || tag_type
== union_type
);
3212 hash
= (htab_hash_pointer (ti
.scope
)
3213 ^ htab_hash_pointer (ti
.name
));
3215 /* See if we already have this type. */
3216 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3221 /* Build the TYPENAME_TYPE. */
3222 t
= cxx_make_type (TYPENAME_TYPE
);
3223 TYPE_CONTEXT (t
) = ti
.scope
;
3224 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3225 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3226 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3228 /* Build the corresponding TYPE_DECL. */
3229 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3230 TYPE_NAME (TREE_TYPE (d
)) = d
;
3231 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3232 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3233 DECL_ARTIFICIAL (d
) = 1;
3235 /* Store it in the hash table. */
3238 /* TYPENAME_TYPEs must always be compared structurally, because
3239 they may or may not resolve down to another type depending on
3240 the currently open classes. */
3241 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3247 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3248 provided to name the type. Returns an appropriate type, unless an
3249 error occurs, in which case error_mark_node is returned. If we
3250 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3251 return that, rather than the _TYPE it corresponds to, in other
3252 cases we look through the type decl. If TF_ERROR is set, complain
3253 about errors, otherwise be quiet. */
3256 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3257 tsubst_flags_t complain
)
3263 if (name
== error_mark_node
3264 || context
== NULL_TREE
3265 || context
== error_mark_node
)
3266 return error_mark_node
;
3270 if (!(TYPE_LANG_SPECIFIC (name
)
3271 && (CLASSTYPE_IS_TEMPLATE (name
)
3272 || CLASSTYPE_USE_TEMPLATE (name
))))
3273 name
= TYPE_IDENTIFIER (name
);
3275 /* Create a TEMPLATE_ID_EXPR for the type. */
3276 name
= build_nt (TEMPLATE_ID_EXPR
,
3277 CLASSTYPE_TI_TEMPLATE (name
),
3278 CLASSTYPE_TI_ARGS (name
));
3280 else if (TREE_CODE (name
) == TYPE_DECL
)
3281 name
= DECL_NAME (name
);
3285 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3287 name
= TREE_OPERAND (name
, 0);
3288 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3289 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3290 else if (TREE_CODE (name
) == OVERLOAD
)
3292 if (complain
& tf_error
)
3293 error ("%qD is not a type", name
);
3294 return error_mark_node
;
3297 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3299 if (complain
& tf_error
)
3300 error ("%qD used without template parameters", name
);
3301 return error_mark_node
;
3303 gcc_assert (identifier_p (name
));
3304 gcc_assert (TYPE_P (context
));
3306 if (!MAYBE_CLASS_TYPE_P (context
))
3308 if (complain
& tf_error
)
3309 error ("%q#T is not a class", context
);
3310 return error_mark_node
;
3313 /* When the CONTEXT is a dependent type, NAME could refer to a
3314 dependent base class of CONTEXT. But look inside it anyway
3315 if CONTEXT is a currently open scope, in case it refers to a
3316 member of the current instantiation or a non-dependent base;
3317 lookup will stop when we hit a dependent base. */
3318 if (!dependent_scope_p (context
))
3319 /* We should only set WANT_TYPE when we're a nested typename type.
3320 Then we can give better diagnostics if we find a non-type. */
3321 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3325 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3326 return build_typename_type (context
, name
, fullname
, tag_type
);
3328 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3332 if (complain
& tf_error
)
3333 error (want_template
? G_("no class template named %q#T in %q#T")
3334 : G_("no type named %q#T in %q#T"), name
, context
);
3335 return error_mark_node
;
3338 /* Pull out the template from an injected-class-name (or multiple). */
3340 t
= maybe_get_template_decl_from_type_decl (t
);
3342 if (TREE_CODE (t
) == TREE_LIST
)
3344 if (complain
& tf_error
)
3346 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3347 print_candidates (t
);
3349 return error_mark_node
;
3352 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3354 if (complain
& tf_error
)
3355 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3357 return error_mark_node
;
3359 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3361 if (complain
& tf_error
)
3362 error ("%<typename %T::%D%> names %q#T, which is not a type",
3364 return error_mark_node
;
3367 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3368 return error_mark_node
;
3370 /* If we are currently parsing a template and if T is a typedef accessed
3371 through CONTEXT then we need to remember and check access of T at
3372 template instantiation time. */
3373 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3376 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3378 /*entering_scope=*/0,
3379 tf_warning_or_error
| tf_user
);
3381 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3384 maybe_record_typedef_use (t
);
3389 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3390 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3391 in which case error_mark_node is returned.
3393 If PARM_LIST is non-NULL, also make sure that the template parameter
3394 list of TEMPLATE_DECL matches.
3396 If COMPLAIN zero, don't complain about any errors that occur. */
3399 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3400 tsubst_flags_t complain
)
3406 name
= TYPE_IDENTIFIER (name
);
3407 else if (DECL_P (name
))
3408 name
= DECL_NAME (name
);
3409 gcc_assert (identifier_p (name
));
3411 if (!dependent_type_p (context
)
3412 || currently_open_class (context
))
3414 tree tmpl
= NULL_TREE
;
3416 if (MAYBE_CLASS_TYPE_P (context
))
3417 tmpl
= lookup_field (context
, name
, 0, false);
3419 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3420 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3422 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3424 if (complain
& tf_error
)
3425 error ("no class template named %q#T in %q#T", name
, context
);
3426 return error_mark_node
;
3430 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3432 if (complain
& tf_error
)
3434 error ("template parameters do not match template");
3435 error ("%q+D declared here", tmpl
);
3437 return error_mark_node
;
3440 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3442 return error_mark_node
;
3447 /* Build the UNBOUND_CLASS_TEMPLATE. */
3448 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3449 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3450 TREE_TYPE (t
) = NULL_TREE
;
3451 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3453 /* Build the corresponding TEMPLATE_DECL. */
3454 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3455 TYPE_NAME (TREE_TYPE (d
)) = d
;
3456 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3457 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3458 DECL_ARTIFICIAL (d
) = 1;
3459 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3466 /* Push the declarations of builtin types into the namespace.
3467 RID_INDEX is the index of the builtin type in the array
3468 RID_POINTERS. NAME is the name used when looking up the builtin
3469 type. TYPE is the _TYPE node for the builtin type. */
3472 record_builtin_type (enum rid rid_index
,
3476 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3477 tree tdecl
= NULL_TREE
;
3479 if ((int) rid_index
< (int) RID_MAX
)
3480 rname
= ridpointers
[(int) rid_index
];
3482 tname
= get_identifier (name
);
3484 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3485 eliminated. Built-in types should not be looked up name; their
3486 names are keywords that the parser can recognize. However, there
3487 is code in c-common.c that uses identifier_global_value to look
3488 up built-in types by name. */
3491 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3492 DECL_ARTIFICIAL (tdecl
) = 1;
3493 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3499 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3500 DECL_ARTIFICIAL (tdecl
) = 1;
3502 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3505 if (!TYPE_NAME (type
))
3506 TYPE_NAME (type
) = tdecl
;
3509 debug_hooks
->type_decl (tdecl
, 0);
3512 /* Record one of the standard Java types.
3513 * Declare it as having the given NAME.
3514 * If SIZE > 0, it is the size of one of the integral types;
3515 * otherwise it is the negative of the size of one of the other types. */
3518 record_builtin_java_type (const char* name
, int size
)
3523 type
= build_nonstandard_integer_type (size
, 0);
3524 type
= build_distinct_type_copy (type
);
3526 else if (size
> -32)
3529 /* "__java_char" or ""__java_boolean". */
3530 type
= build_nonstandard_integer_type (-size
, 1);
3531 type
= build_distinct_type_copy (type
);
3532 /* Get the signed type cached and attached to the unsigned type,
3533 so it doesn't get garbage-collected at "random" times,
3534 causing potential codegen differences out of different UIDs
3535 and different alias set numbers. */
3536 stype
= build_nonstandard_integer_type (-size
, 0);
3537 stype
= build_distinct_type_copy (stype
);
3538 TREE_CHAIN (type
) = stype
;
3539 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3542 { /* "__java_float" or ""__java_double". */
3543 type
= make_node (REAL_TYPE
);
3544 TYPE_PRECISION (type
) = - size
;
3547 record_builtin_type (RID_MAX
, name
, type
);
3548 decl
= TYPE_NAME (type
);
3550 /* Suppress generate debug symbol entries for these types,
3551 since for normal C++ they are just clutter.
3552 However, push_lang_context undoes this if extern "Java" is seen. */
3553 DECL_IGNORED_P (decl
) = 1;
3555 TYPE_FOR_JAVA (type
) = 1;
3559 /* Push a type into the namespace so that the back ends ignore it. */
3562 record_unknown_type (tree type
, const char* name
)
3564 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3565 TYPE_DECL
, get_identifier (name
), type
));
3566 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3567 DECL_IGNORED_P (decl
) = 1;
3568 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3569 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3570 TYPE_ALIGN (type
) = 1;
3571 TYPE_USER_ALIGN (type
) = 0;
3572 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3575 /* A string for which we should create an IDENTIFIER_NODE at
3578 typedef struct predefined_identifier
3580 /* The name of the identifier. */
3581 const char *const name
;
3582 /* The place where the IDENTIFIER_NODE should be stored. */
3584 /* Nonzero if this is the name of a constructor or destructor. */
3585 const int ctor_or_dtor_p
;
3586 } predefined_identifier
;
3588 /* Create all the predefined identifiers. */
3591 initialize_predefined_identifiers (void)
3593 const predefined_identifier
*pid
;
3595 /* A table of identifiers to create at startup. */
3596 static const predefined_identifier predefined_identifiers
[] = {
3597 { "C++", &lang_name_cplusplus
, 0 },
3598 { "C", &lang_name_c
, 0 },
3599 { "Java", &lang_name_java
, 0 },
3600 /* Some of these names have a trailing space so that it is
3601 impossible for them to conflict with names written by users. */
3602 { "__ct ", &ctor_identifier
, 1 },
3603 { "__base_ctor ", &base_ctor_identifier
, 1 },
3604 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3605 { "__dt ", &dtor_identifier
, 1 },
3606 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3607 { "__base_dtor ", &base_dtor_identifier
, 1 },
3608 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3609 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3610 { "nelts", &nelts_identifier
, 0 },
3611 { THIS_NAME
, &this_identifier
, 0 },
3612 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3613 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3614 { "_vptr", &vptr_identifier
, 0 },
3615 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3616 { "::", &global_scope_name
, 0 },
3617 { "std", &std_identifier
, 0 },
3621 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3623 *pid
->node
= get_identifier (pid
->name
);
3624 if (pid
->ctor_or_dtor_p
)
3625 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3629 /* Create the predefined scalar types of C,
3630 and some nodes representing standard constants (0, 1, (void *)0).
3631 Initialize the global binding level.
3632 Make definitions for built-in primitive functions. */
3635 cxx_init_decl_processing (void)
3638 tree void_ftype_ptr
;
3640 /* Create all the identifiers we need. */
3641 initialize_predefined_identifiers ();
3643 /* Create the global variables. */
3644 push_to_top_level ();
3646 current_function_decl
= NULL_TREE
;
3647 current_binding_level
= NULL
;
3648 /* Enter the global namespace. */
3649 gcc_assert (global_namespace
== NULL_TREE
);
3650 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3652 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3653 TREE_PUBLIC (global_namespace
) = 1;
3654 begin_scope (sk_namespace
, global_namespace
);
3656 if (flag_visibility_ms_compat
)
3657 default_visibility
= VISIBILITY_HIDDEN
;
3660 current_lang_name
= lang_name_c
;
3662 /* Create the `std' namespace. */
3663 push_namespace (std_identifier
);
3664 std_node
= current_namespace
;
3667 c_common_nodes_and_builtins ();
3669 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3670 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3671 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3672 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3673 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3674 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3675 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3676 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3678 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3680 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3681 truthvalue_type_node
= boolean_type_node
;
3682 truthvalue_false_node
= boolean_false_node
;
3683 truthvalue_true_node
= boolean_true_node
;
3685 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3686 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3687 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3690 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3693 delta_type_node
= ptrdiff_type_node
;
3694 vtable_index_type
= ptrdiff_type_node
;
3696 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3697 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3698 void_ftype_ptr
= build_function_type_list (void_type_node
,
3699 ptr_type_node
, NULL_TREE
);
3701 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3703 /* C++ extensions */
3705 unknown_type_node
= make_node (LANG_TYPE
);
3706 record_unknown_type (unknown_type_node
, "unknown type");
3708 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3709 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3711 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3713 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3714 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3716 init_list_type_node
= make_node (LANG_TYPE
);
3717 record_unknown_type (init_list_type_node
, "init list");
3720 /* Make sure we get a unique function type, so we can give
3721 its pointer type a name. (This wins for gdb.) */
3722 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3723 TREE_TYPE (vfunc_type
) = integer_type_node
;
3724 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3725 layout_type (vfunc_type
);
3727 vtable_entry_type
= build_pointer_type (vfunc_type
);
3729 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3732 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3733 layout_type (vtbl_type_node
);
3734 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3735 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3736 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3737 layout_type (vtbl_ptr_type_node
);
3738 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3740 push_namespace (get_identifier ("__cxxabiv1"));
3741 abi_node
= current_namespace
;
3744 global_type_node
= make_node (LANG_TYPE
);
3745 record_unknown_type (global_type_node
, "global type");
3748 current_lang_name
= lang_name_cplusplus
;
3751 tree newattrs
, extvisattr
;
3752 tree newtype
, deltype
;
3753 tree ptr_ftype_sizetype
;
3757 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3758 if (cxx_dialect
== cxx98
)
3761 tree bad_alloc_type_node
;
3762 tree bad_alloc_decl
;
3764 push_namespace (std_identifier
);
3765 bad_alloc_id
= get_identifier ("bad_alloc");
3766 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3767 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3769 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3770 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3774 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3777 new_eh_spec
= noexcept_false_spec
;
3779 /* Ensure attribs.c is initialized. */
3781 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3783 newattrs
= tree_cons (get_identifier ("alloc_size"),
3784 build_tree_list (NULL_TREE
, integer_one_node
),
3786 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3787 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3788 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3789 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3790 push_cp_library_fn (NEW_EXPR
, newtype
);
3791 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3792 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3793 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3795 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3796 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3797 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3798 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3799 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3800 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3801 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3802 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3806 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3808 /* Perform other language dependent initializations. */
3809 init_class_processing ();
3810 init_rtti_processing ();
3811 init_template_processing ();
3813 if (flag_exceptions
)
3814 init_exception_processing ();
3816 if (! supports_one_only ())
3819 make_fname_decl
= cp_make_fname_decl
;
3820 start_fname_decls ();
3822 /* Show we use EH for cleanups. */
3823 if (flag_exceptions
)
3824 using_eh_for_cleanups ();
3827 /* Generate an initializer for a function naming variable from
3828 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3829 filled in with the type of the init. */
3832 cp_fname_init (const char* name
, tree
*type_p
)
3834 tree domain
= NULL_TREE
;
3836 tree init
= NULL_TREE
;
3841 length
= strlen (name
);
3842 domain
= build_index_type (size_int (length
));
3843 init
= build_string (length
+ 1, name
);
3846 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3847 type
= build_cplus_array_type (type
, domain
);
3852 TREE_TYPE (init
) = type
;
3854 init
= error_mark_node
;
3859 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3860 the decl, LOC is the location to give the decl, NAME is the
3861 initialization string and TYPE_DEP indicates whether NAME depended
3862 on the type of the function. We make use of that to detect
3863 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3864 at the point of first use, so we mustn't push the decl now. */
3867 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3869 const char *const name
= (type_dep
&& processing_template_decl
3870 ? NULL
: fname_as_string (type_dep
));
3872 tree init
= cp_fname_init (name
, &type
);
3873 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3876 free (CONST_CAST (char *, name
));
3878 /* As we're using pushdecl_with_scope, we must set the context. */
3879 DECL_CONTEXT (decl
) = current_function_decl
;
3881 TREE_STATIC (decl
) = 1;
3882 TREE_READONLY (decl
) = 1;
3883 DECL_ARTIFICIAL (decl
) = 1;
3885 TREE_USED (decl
) = 1;
3887 if (current_function_decl
)
3889 cp_binding_level
*b
= current_binding_level
;
3890 if (b
->kind
== sk_function_parms
)
3891 return error_mark_node
;
3892 while (b
->level_chain
->kind
!= sk_function_parms
)
3894 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3895 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3896 LOOKUP_ONLYCONVERTING
);
3900 DECL_THIS_STATIC (decl
) = true;
3901 pushdecl_top_level_and_finish (decl
, init
);
3908 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3910 tree id
= DECL_NAME (decl
);
3911 const char *name
= IDENTIFIER_POINTER (id
);
3913 retrofit_lang_decl (decl
);
3915 DECL_ARTIFICIAL (decl
) = 1;
3916 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3917 SET_DECL_LANGUAGE (decl
, lang_c
);
3918 /* Runtime library routines are, by definition, available in an
3919 external shared object. */
3920 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3921 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3923 DECL_CONTEXT (decl
) = context
;
3926 pushdecl_top_level (decl
);
3930 /* A function in the user's namespace should have an explicit
3931 declaration before it is used. Mark the built-in function as
3932 anticipated but not actually declared. */
3933 if (name
[0] != '_' || name
[1] != '_')
3934 DECL_ANTICIPATED (decl
) = 1;
3935 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3937 size_t len
= strlen (name
);
3939 /* Treat __*_chk fortification functions as anticipated as well,
3940 unless they are __builtin_*. */
3941 if (len
> strlen ("___chk")
3942 && memcmp (name
+ len
- strlen ("_chk"),
3943 "_chk", strlen ("_chk") + 1) == 0)
3944 DECL_ANTICIPATED (decl
) = 1;
3951 cxx_builtin_function (tree decl
)
3953 tree id
= DECL_NAME (decl
);
3954 const char *name
= IDENTIFIER_POINTER (id
);
3955 /* All builtins that don't begin with an '_' should additionally
3956 go in the 'std' namespace. */
3959 tree decl2
= copy_node(decl
);
3960 push_namespace (std_identifier
);
3961 builtin_function_1 (decl2
, std_node
, false);
3965 return builtin_function_1 (decl
, NULL_TREE
, false);
3968 /* Like cxx_builtin_function, but guarantee the function is added to the global
3969 scope. This is to allow function specific options to add new machine
3970 dependent builtins when the target ISA changes via attribute((target(...)))
3971 which saves space on program startup if the program does not use non-generic
3975 cxx_builtin_function_ext_scope (tree decl
)
3978 tree id
= DECL_NAME (decl
);
3979 const char *name
= IDENTIFIER_POINTER (id
);
3980 /* All builtins that don't begin with an '_' should additionally
3981 go in the 'std' namespace. */
3984 tree decl2
= copy_node(decl
);
3985 push_namespace (std_identifier
);
3986 builtin_function_1 (decl2
, std_node
, true);
3990 return builtin_function_1 (decl
, NULL_TREE
, true);
3993 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3994 function. Not called directly. */
3997 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3999 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4000 DECL_EXTERNAL (fn
) = 1;
4001 TREE_PUBLIC (fn
) = 1;
4002 DECL_ARTIFICIAL (fn
) = 1;
4003 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4004 SET_DECL_LANGUAGE (fn
, lang_c
);
4005 /* Runtime library routines are, by definition, available in an
4006 external shared object. */
4007 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4008 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4012 /* Returns the _DECL for a library function with C linkage.
4013 We assume that such functions never throw; if this is incorrect,
4014 callers should unset TREE_NOTHROW. */
4017 build_library_fn (tree name
, tree type
)
4019 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
4020 TREE_NOTHROW (fn
) = 1;
4024 /* Returns the _DECL for a library function with C++ linkage. */
4027 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
4029 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
4030 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
4031 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4032 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4036 /* Like build_library_fn, but takes a C string instead of an
4040 build_library_fn_ptr (const char* name
, tree type
)
4042 return build_library_fn (get_identifier (name
), type
);
4045 /* Like build_cp_library_fn, but takes a C string instead of an
4049 build_cp_library_fn_ptr (const char* name
, tree type
)
4051 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
4054 /* Like build_library_fn, but also pushes the function so that we will
4055 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4056 may throw exceptions listed in RAISES. */
4059 push_library_fn (tree name
, tree type
, tree raises
)
4064 type
= build_exception_variant (type
, raises
);
4066 fn
= build_library_fn (name
, type
);
4067 pushdecl_top_level (fn
);
4071 /* Like build_cp_library_fn, but also pushes the function so that it
4072 will be found by normal lookup. */
4075 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4077 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4082 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4086 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4090 push_void_library_fn (tree name
, tree parmtypes
)
4092 tree type
= build_function_type (void_type_node
, parmtypes
);
4093 return push_library_fn (name
, type
, NULL_TREE
);
4096 /* Like push_library_fn, but also note that this function throws
4097 and does not return. Used for __throw_foo and the like. */
4100 push_throw_library_fn (tree name
, tree type
)
4102 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4103 TREE_THIS_VOLATILE (fn
) = 1;
4104 TREE_NOTHROW (fn
) = 0;
4108 /* When we call finish_struct for an anonymous union, we create
4109 default copy constructors and such. But, an anonymous union
4110 shouldn't have such things; this function undoes the damage to the
4111 anonymous union type T.
4113 (The reason that we create the synthesized methods is that we don't
4114 distinguish `union { int i; }' from `typedef union { int i; } U'.
4115 The first is an anonymous union; the second is just an ordinary
4119 fixup_anonymous_aggr (tree t
)
4123 /* Wipe out memory of synthesized methods. */
4124 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4125 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4126 TYPE_HAS_COPY_CTOR (t
) = 0;
4127 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4128 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4129 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4131 /* Splice the implicitly generated functions out of the TYPE_METHODS
4133 q
= &TYPE_METHODS (t
);
4136 if (DECL_ARTIFICIAL (*q
))
4137 *q
= TREE_CHAIN (*q
);
4139 q
= &DECL_CHAIN (*q
);
4142 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4143 if (TYPE_METHODS (t
))
4145 tree decl
= TYPE_MAIN_DECL (t
);
4147 if (TREE_CODE (t
) != UNION_TYPE
)
4148 error_at (DECL_SOURCE_LOCATION (decl
),
4149 "an anonymous struct cannot have function members");
4151 error_at (DECL_SOURCE_LOCATION (decl
),
4152 "an anonymous union cannot have function members");
4155 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4156 assignment operators (because they cannot have these methods themselves).
4157 For anonymous unions this is already checked because they are not allowed
4158 in any union, otherwise we have to check it. */
4159 if (TREE_CODE (t
) != UNION_TYPE
)
4163 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4164 if (TREE_CODE (field
) == FIELD_DECL
)
4166 type
= TREE_TYPE (field
);
4167 if (CLASS_TYPE_P (type
))
4169 if (TYPE_NEEDS_CONSTRUCTING (type
))
4170 error ("member %q+#D with constructor not allowed "
4171 "in anonymous aggregate", field
);
4172 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4173 error ("member %q+#D with destructor not allowed "
4174 "in anonymous aggregate", field
);
4175 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4176 error ("member %q+#D with copy assignment operator "
4177 "not allowed in anonymous aggregate", field
);
4183 /* Warn for an attribute located at LOCATION that appertains to the
4184 class type CLASS_TYPE that has not been properly placed after its
4185 class-key, in it class-specifier. */
4188 warn_misplaced_attr_for_class_type (source_location location
,
4191 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4193 warning_at (location
, OPT_Wattributes
,
4194 "attribute ignored in declaration "
4195 "of %q#T", class_type
);
4197 "attribute for %q#T must follow the %qs keyword",
4198 class_type
, class_key_or_enum_as_string (class_type
));
4201 /* Make sure that a declaration with no declarator is well-formed, i.e.
4202 just declares a tagged type or anonymous union.
4204 Returns the type declared; or NULL_TREE if none. */
4207 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4208 bool explicit_type_instantiation_p
)
4210 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4211 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4212 /* If a class, struct, or enum type is declared by the DECLSPECS
4213 (i.e, if a class-specifier, enum-specifier, or non-typename
4214 elaborated-type-specifier appears in the DECLSPECS),
4215 DECLARED_TYPE is set to the corresponding type. */
4216 tree declared_type
= NULL_TREE
;
4217 bool error_p
= false;
4219 if (declspecs
->multiple_types_p
)
4220 error ("multiple types in one declaration");
4221 else if (declspecs
->redefined_builtin_type
)
4223 if (!in_system_header
)
4224 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4225 "redeclaration of C++ built-in type %qT",
4226 declspecs
->redefined_builtin_type
);
4231 && TYPE_P (declspecs
->type
)
4232 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4233 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4234 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4235 declared_type
= declspecs
->type
;
4236 else if (declspecs
->type
== error_mark_node
)
4238 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4239 permerror (input_location
, "declaration does not declare anything");
4240 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4242 error ("%<auto%> can only be specified for variables "
4243 "or function declarations");
4244 return error_mark_node
;
4246 /* Check for an anonymous union. */
4247 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4248 && TYPE_ANONYMOUS_P (declared_type
))
4250 /* 7/3 In a simple-declaration, the optional init-declarator-list
4251 can be omitted only when declaring a class (clause 9) or
4252 enumeration (7.2), that is, when the decl-specifier-seq contains
4253 either a class-specifier, an elaborated-type-specifier with
4254 a class-key (9.1), or an enum-specifier. In these cases and
4255 whenever a class-specifier or enum-specifier is present in the
4256 decl-specifier-seq, the identifiers in these specifiers are among
4257 the names being declared by the declaration (as class-name,
4258 enum-names, or enumerators, depending on the syntax). In such
4259 cases, and except for the declaration of an unnamed bit-field (9.6),
4260 the decl-specifier-seq shall introduce one or more names into the
4261 program, or shall redeclare a name introduced by a previous
4262 declaration. [Example:
4263 enum { }; // ill-formed
4264 typedef class { }; // ill-formed
4268 error ("missing type-name in typedef-declaration");
4271 /* Anonymous unions are objects, so they can have specifiers. */;
4272 SET_ANON_AGGR_TYPE_P (declared_type
);
4274 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4275 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4280 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4281 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4282 error ("%qs can only be specified for functions",
4283 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4284 ? "inline" : "virtual");
4286 && (!current_class_type
4287 || current_scope () != current_class_type
))
4288 error ("%<friend%> can only be specified inside a class");
4289 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4290 error ("%<explicit%> can only be specified for constructors");
4291 else if (declspecs
->storage_class
)
4292 error ("a storage class can only be specified for objects "
4294 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4295 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4296 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4297 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4298 error ("qualifiers can only be specified for objects "
4300 else if (saw_typedef
)
4301 warning (0, "%<typedef%> was ignored in this declaration");
4302 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4303 error ("%<constexpr%> cannot be used for type declarations");
4306 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4309 if (!CLASS_TYPE_P (declared_type
)
4310 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4311 /* For a non-template class, use the name location. */
4312 loc
= location_of (declared_type
);
4314 /* For a template class (an explicit instantiation), use the
4315 current location. */
4316 loc
= input_location
;
4318 if (explicit_type_instantiation_p
)
4319 /* [dcl.attr.grammar]/4:
4321 No attribute-specifier-seq shall appertain to an explicit
4324 warning_at (loc
, OPT_Wattributes
,
4325 "attribute ignored in explicit instantiation %q#T",
4328 "no attribute can be applied to "
4329 "an explicit instantiation");
4332 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4335 return declared_type
;
4338 /* Called when a declaration is seen that contains no names to declare.
4339 If its type is a reference to a structure, union or enum inherited
4340 from a containing scope, shadow that tag name for the current scope
4341 with a forward reference.
4342 If its type defines a new named structure or union
4343 or defines an enum, it is valid but we need not do anything here.
4344 Otherwise, it is an error.
4346 C++: may have to grok the declspecs to learn about static,
4347 complain for anonymous unions.
4349 Returns the TYPE declared -- or NULL_TREE if none. */
4352 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4354 tree t
= check_tag_decl (declspecs
,
4355 /*explicit_type_instantiation_p=*/false);
4360 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4363 /* This is where the variables in an anonymous union are
4364 declared. An anonymous union declaration looks like:
4366 because there is no declarator after the union, the parser
4367 sends that declaration here. */
4368 if (ANON_AGGR_TYPE_P (t
))
4370 fixup_anonymous_aggr (t
);
4372 if (TYPE_FIELDS (t
))
4374 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4375 declspecs
, NORMAL
, 0, NULL
);
4376 finish_anon_union (decl
);
4383 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4386 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4387 const cp_declarator
*declarator
,
4388 bool is_template_arg
)
4392 enum decl_context context
4393 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4394 attrs
= type_specifiers
->attributes
;
4395 type_specifiers
->attributes
= NULL_TREE
;
4396 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4397 if (attrs
&& type
!= error_mark_node
)
4399 if (CLASS_TYPE_P (type
))
4400 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4401 "outside of definition", type
);
4402 else if (MAYBE_CLASS_TYPE_P (type
))
4403 /* A template type parameter or other dependent type. */
4404 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4405 "type %qT without an associated declaration", type
);
4407 cplus_decl_attributes (&type
, attrs
, 0);
4412 /* Process a DECLARATOR for a function-scope variable declaration,
4413 namespace-scope variable declaration, or function declaration.
4414 (Function definitions go through start_function; class member
4415 declarations appearing in the body of the class go through
4416 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4417 If an error occurs, the error_mark_node is returned instead.
4419 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4420 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4421 for an explicitly defaulted function, or SD_DELETED for an explicitly
4422 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4423 implicitly initialized via a default constructor. ATTRIBUTES and
4424 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4426 The scope represented by the context of the returned DECL is pushed
4427 (if it is not the global namespace) and is assigned to
4428 *PUSHED_SCOPE_P. The caller is then responsible for calling
4429 pop_scope on *PUSHED_SCOPE_P if it is set. */
4432 start_decl (const cp_declarator
*declarator
,
4433 cp_decl_specifier_seq
*declspecs
,
4436 tree prefix_attributes
,
4437 tree
*pushed_scope_p
)
4445 *pushed_scope_p
= NULL_TREE
;
4447 /* An object declared as __attribute__((deprecated)) suppresses
4448 warnings of uses of other deprecated items. */
4449 if (lookup_attribute ("deprecated", attributes
))
4450 deprecated_state
= DEPRECATED_SUPPRESS
;
4452 attributes
= chainon (attributes
, prefix_attributes
);
4454 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4457 deprecated_state
= DEPRECATED_NORMAL
;
4459 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4460 || decl
== error_mark_node
)
4461 return error_mark_node
;
4463 context
= CP_DECL_CONTEXT (decl
);
4464 if (context
!= global_namespace
)
4465 *pushed_scope_p
= push_scope (context
);
4468 /* Is it valid for this decl to have an initializer at all?
4469 If not, set INITIALIZED to zero, which will indirectly
4470 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4471 switch (TREE_CODE (decl
))
4474 error ("typedef %qD is initialized (use decltype instead)", decl
);
4475 return error_mark_node
;
4478 if (initialized
== SD_DELETED
)
4479 /* We'll handle the rest of the semantics later, but we need to
4480 set this now so it's visible to duplicate_decls. */
4481 DECL_DELETED_FN (decl
) = 1;
4490 if (! toplevel_bindings_p ()
4491 && DECL_EXTERNAL (decl
))
4492 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4494 DECL_EXTERNAL (decl
) = 0;
4495 if (toplevel_bindings_p ())
4496 TREE_STATIC (decl
) = 1;
4498 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4500 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4501 record_key_method_defined (decl
);
4503 /* If this is a typedef that names the class for linkage purposes
4504 (7.1.3p8), apply any attributes directly to the type. */
4505 if (TREE_CODE (decl
) == TYPE_DECL
4506 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4507 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4508 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4512 /* Set attributes here so if duplicate decl, will have proper attributes. */
4513 cplus_decl_attributes (&decl
, attributes
, flags
);
4515 /* Dllimported symbols cannot be defined. Static data members (which
4516 can be initialized in-class and dllimported) go through grokfield,
4517 not here, so we don't need to exclude those decls when checking for
4519 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4521 error ("definition of %q#D is marked %<dllimport%>", decl
);
4522 DECL_DLLIMPORT_P (decl
) = 0;
4525 /* If #pragma weak was used, mark the decl weak now. */
4526 if (!processing_template_decl
)
4527 maybe_apply_pragma_weak (decl
);
4529 if (TREE_CODE (decl
) == FUNCTION_DECL
4530 && DECL_DECLARED_INLINE_P (decl
)
4531 && DECL_UNINLINABLE (decl
)
4532 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4533 warning (0, "inline function %q+D given attribute noinline", decl
);
4535 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4539 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4540 if (field
== NULL_TREE
|| !VAR_P (field
))
4541 error ("%q#D is not a static member of %q#T", decl
, context
);
4544 if (DECL_CONTEXT (field
) != context
)
4546 if (!same_type_p (DECL_CONTEXT (field
), context
))
4547 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4548 "to be defined as %<%T::%D%>",
4549 DECL_CONTEXT (field
), DECL_NAME (decl
),
4550 context
, DECL_NAME (decl
));
4551 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4553 /* Static data member are tricky; an in-class initialization
4554 still doesn't provide a definition, so the in-class
4555 declaration will have DECL_EXTERNAL set, but will have an
4556 initialization. Thus, duplicate_decls won't warn
4557 about this situation, and so we check here. */
4558 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4559 error ("duplicate initialization of %qD", decl
);
4560 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4562 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4563 && !DECL_DECLARED_CONSTEXPR_P (field
))
4564 error ("%qD declared %<constexpr%> outside its class", field
);
4569 tree field
= check_classfn (context
, decl
,
4570 (processing_template_decl
4571 > template_class_depth (context
))
4572 ? current_template_parms
4574 if (field
&& field
!= error_mark_node
4575 && duplicate_decls (decl
, field
,
4576 /*newdecl_is_friend=*/false))
4580 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4581 DECL_IN_AGGR_P (decl
) = 0;
4582 /* Do not mark DECL as an explicit specialization if it was not
4583 already marked as an instantiation; a declaration should
4584 never be marked as a specialization unless we know what
4585 template is being specialized. */
4586 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4588 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4590 /* [temp.expl.spec] An explicit specialization of a static data
4591 member of a template is a definition if the declaration
4592 includes an initializer; otherwise, it is a declaration.
4594 We check for processing_specialization so this only applies
4595 to the new specialization syntax. */
4596 if (!initialized
&& processing_specialization
)
4597 DECL_EXTERNAL (decl
) = 1;
4600 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4601 /* Aliases are definitions. */
4603 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4607 was_public
= TREE_PUBLIC (decl
);
4609 /* Enter this declaration into the symbol table. */
4610 decl
= maybe_push_decl (decl
);
4612 if (processing_template_decl
)
4613 decl
= push_template_decl (decl
);
4614 if (decl
== error_mark_node
)
4615 return error_mark_node
;
4618 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4619 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4621 /* This is a const variable with implicit 'static'. Set
4622 DECL_THIS_STATIC so we can tell it from variables that are
4623 !TREE_PUBLIC because of the anonymous namespace. */
4624 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4625 DECL_THIS_STATIC (decl
) = 1;
4628 if (!processing_template_decl
&& VAR_P (decl
))
4629 start_decl_1 (decl
, initialized
);
4634 /* Process the declaration of a variable DECL. INITIALIZED is true
4635 iff DECL is explicitly initialized. (INITIALIZED is false if the
4636 variable is initialized via an implicitly-called constructor.)
4637 This function must be called for ordinary variables (including, for
4638 example, implicit instantiations of templates), but must not be
4639 called for template declarations. */
4642 start_decl_1 (tree decl
, bool initialized
)
4646 bool aggregate_definition_p
;
4648 gcc_assert (!processing_template_decl
);
4650 if (error_operand_p (decl
))
4653 gcc_assert (VAR_P (decl
));
4655 type
= TREE_TYPE (decl
);
4656 complete_p
= COMPLETE_TYPE_P (type
);
4657 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4659 /* If an explicit initializer is present, or if this is a definition
4660 of an aggregate, then we need a complete type at this point.
4661 (Scalars are always complete types, so there is nothing to
4662 check.) This code just sets COMPLETE_P; errors (if necessary)
4663 are issued below. */
4664 if ((initialized
|| aggregate_definition_p
)
4666 && COMPLETE_TYPE_P (complete_type (type
)))
4669 /* We will not yet have set TREE_READONLY on DECL if the type
4670 was "const", but incomplete, before this point. But, now, we
4671 have a complete type, so we can try again. */
4672 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4676 /* Is it valid for this decl to have an initializer at all? */
4678 /* Don't allow initializations for incomplete types except for
4679 arrays which might be completed by the initialization. */
4681 ; /* A complete type is ok. */
4682 else if (type_uses_auto (type
))
4683 ; /* An auto type is ok. */
4684 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4686 error ("variable %q#D has initializer but incomplete type", decl
);
4687 type
= TREE_TYPE (decl
) = error_mark_node
;
4689 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4691 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4692 error ("elements of array %q#D have incomplete type", decl
);
4693 /* else we already gave an error in start_decl. */
4696 else if (aggregate_definition_p
&& !complete_p
)
4698 if (type_uses_auto (type
))
4699 error ("declaration of %q#D has no initializer", decl
);
4701 error ("aggregate %q#D has incomplete type and cannot be defined",
4703 /* Change the type so that assemble_variable will give
4704 DECL an rtl we can live with: (mem (const_int 0)). */
4705 type
= TREE_TYPE (decl
) = error_mark_node
;
4708 /* Create a new scope to hold this declaration if necessary.
4709 Whether or not a new scope is necessary cannot be determined
4710 until after the type has been completed; if the type is a
4711 specialization of a class template it is not until after
4712 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4713 will be set correctly. */
4714 maybe_push_cleanup_level (type
);
4717 /* Handle initialization of references. DECL, TYPE, and INIT have the
4718 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4719 but will be set to a new CLEANUP_STMT if a temporary is created
4720 that must be destroyed subsequently.
4722 Returns an initializer expression to use to initialize DECL, or
4723 NULL if the initialization can be performed statically.
4725 Quotes on semantics can be found in ARM 8.4.3. */
4728 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4730 if (init
== NULL_TREE
)
4732 if ((DECL_LANG_SPECIFIC (decl
) == 0
4733 || DECL_IN_AGGR_P (decl
) == 0)
4734 && ! DECL_THIS_EXTERN (decl
))
4735 error ("%qD declared as reference but not initialized", decl
);
4739 if (TREE_CODE (init
) == TREE_LIST
)
4740 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4741 tf_warning_or_error
);
4743 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4744 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4745 /* Note: default conversion is only called in very special cases. */
4746 init
= decay_conversion (init
, tf_warning_or_error
);
4748 /* Convert INIT to the reference type TYPE. This may involve the
4749 creation of a temporary, whose lifetime must be the same as that
4750 of the reference. If so, a DECL_EXPR for the temporary will be
4751 added just after the DECL_EXPR for DECL. That's why we don't set
4752 DECL_INITIAL for local references (instead assigning to them
4753 explicitly); we need to allow the temporary to be initialized
4755 return initialize_reference (type
, init
, flags
,
4756 tf_warning_or_error
);
4759 /* Designated initializers in arrays are not supported in GNU C++.
4760 The parser cannot detect this error since it does not know whether
4761 a given brace-enclosed initializer is for a class type or for an
4762 array. This function checks that CE does not use a designated
4763 initializer. If it does, an error is issued. Returns true if CE
4764 is valid, i.e., does not have a designated initializer. */
4767 check_array_designated_initializer (constructor_elt
*ce
,
4768 unsigned HOST_WIDE_INT index
)
4770 /* Designated initializers for array elements are not supported. */
4773 /* The parser only allows identifiers as designated
4775 if (ce
->index
== error_mark_node
)
4777 error ("name used in a GNU-style designated "
4778 "initializer for an array");
4781 else if (identifier_p (ce
->index
))
4783 error ("name %qD used in a GNU-style designated "
4784 "initializer for an array", ce
->index
);
4788 ce
->index
= cxx_constant_value (ce
->index
);
4790 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4792 /* A C99 designator is OK if it matches the current index. */
4793 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4796 sorry ("non-trivial designated initializers not supported");
4807 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4808 array until we finish parsing the initializer. If that's the
4809 situation we're in, update DECL accordingly. */
4812 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4814 tree type
= TREE_TYPE (decl
);
4816 if (TREE_CODE (type
) == ARRAY_TYPE
4817 && TYPE_DOMAIN (type
) == NULL_TREE
4818 && TREE_CODE (decl
) != TYPE_DECL
)
4820 /* do_default is really a C-ism to deal with tentative definitions.
4821 But let's leave it here to ease the eventual merge. */
4822 int do_default
= !DECL_EXTERNAL (decl
);
4823 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4826 /* Check that there are no designated initializers in INIT, as
4827 those are not supported in GNU C++, and as the middle-end
4828 will crash if presented with a non-numeric designated
4830 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4832 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4833 constructor_elt
*ce
;
4835 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4836 if (!check_array_designated_initializer (ce
, i
))
4842 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4846 error ("initializer fails to determine size of %qD", decl
);
4848 else if (failure
== 2)
4852 error ("array size missing in %qD", decl
);
4854 /* If a `static' var's size isn't known, make it extern as
4855 well as static, so it does not get allocated. If it's not
4856 `static', then don't mark it extern; finish_incomplete_decl
4857 will give it a default size and it will get allocated. */
4858 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4859 DECL_EXTERNAL (decl
) = 1;
4861 else if (failure
== 3)
4863 error ("zero-size array %qD", decl
);
4867 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4869 relayout_decl (decl
);
4873 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4874 any appropriate error messages regarding the layout. */
4877 layout_var_decl (tree decl
)
4881 type
= TREE_TYPE (decl
);
4882 if (type
== error_mark_node
)
4885 /* If we haven't already layed out this declaration, do so now.
4886 Note that we must not call complete type for an external object
4887 because it's type might involve templates that we are not
4888 supposed to instantiate yet. (And it's perfectly valid to say
4889 `extern X x' for some incomplete type `X'.) */
4890 if (!DECL_EXTERNAL (decl
))
4891 complete_type (type
);
4892 if (!DECL_SIZE (decl
)
4893 && TREE_TYPE (decl
) != error_mark_node
4894 && (COMPLETE_TYPE_P (type
)
4895 || (TREE_CODE (type
) == ARRAY_TYPE
4896 && !TYPE_DOMAIN (type
)
4897 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4898 layout_decl (decl
, 0);
4900 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4902 /* An automatic variable with an incomplete type: that is an error.
4903 Don't talk about array types here, since we took care of that
4904 message in grokdeclarator. */
4905 error ("storage size of %qD isn%'t known", decl
);
4906 TREE_TYPE (decl
) = error_mark_node
;
4909 /* Keep this code around in case we later want to control debug info
4910 based on whether a type is "used". (jason 1999-11-11) */
4912 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4913 /* Let debugger know it should output info for this type. */
4914 note_debug_info_needed (ttype
);
4916 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4917 note_debug_info_needed (DECL_CONTEXT (decl
));
4920 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4921 && DECL_SIZE (decl
) != NULL_TREE
4922 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4924 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4925 constant_expression_warning (DECL_SIZE (decl
));
4928 error ("storage size of %qD isn%'t constant", decl
);
4929 TREE_TYPE (decl
) = error_mark_node
;
4934 /* If a local static variable is declared in an inline function, or if
4935 we have a weak definition, we must endeavor to create only one
4936 instance of the variable at link-time. */
4939 maybe_commonize_var (tree decl
)
4941 /* Static data in a function with comdat linkage also has comdat
4943 if (TREE_STATIC (decl
)
4944 /* Don't mess with __FUNCTION__. */
4945 && ! DECL_ARTIFICIAL (decl
)
4946 && DECL_FUNCTION_SCOPE_P (decl
)
4947 && vague_linkage_p (DECL_CONTEXT (decl
)))
4951 /* With weak symbols, we simply make the variable COMDAT;
4952 that will cause copies in multiple translations units to
4954 comdat_linkage (decl
);
4958 if (DECL_INITIAL (decl
) == NULL_TREE
4959 || DECL_INITIAL (decl
) == error_mark_node
)
4961 /* Without weak symbols, we can use COMMON to merge
4962 uninitialized variables. */
4963 TREE_PUBLIC (decl
) = 1;
4964 DECL_COMMON (decl
) = 1;
4968 /* While for initialized variables, we must use internal
4969 linkage -- which means that multiple copies will not
4971 TREE_PUBLIC (decl
) = 0;
4972 DECL_COMMON (decl
) = 0;
4973 warning_at (input_location
, 0,
4974 "sorry: semantics of inline function static "
4975 "data %q+#D are wrong (you%'ll wind up "
4976 "with multiple copies)", decl
);
4977 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4978 " you can work around this by removing "
4983 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4984 /* Set it up again; we might have set DECL_INITIAL since the last
4986 comdat_linkage (decl
);
4989 /* Issue an error message if DECL is an uninitialized const variable. */
4992 check_for_uninitialized_const_var (tree decl
)
4994 tree type
= strip_array_types (TREE_TYPE (decl
));
4996 /* ``Unless explicitly declared extern, a const object does not have
4997 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5000 && TREE_CODE (type
) != REFERENCE_TYPE
5001 && CP_TYPE_CONST_P (type
)
5002 && !DECL_INITIAL (decl
))
5004 tree field
= default_init_uninitialized_part (type
);
5008 permerror (DECL_SOURCE_LOCATION (decl
),
5009 "uninitialized const %qD", decl
);
5011 if (CLASS_TYPE_P (type
))
5013 tree defaulted_ctor
;
5015 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5016 "%q#T has no user-provided default constructor", type
);
5017 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5019 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5020 "constructor is not user-provided because it is "
5021 "explicitly defaulted in the class body");
5022 inform (0, "and the implicitly-defined constructor does not "
5023 "initialize %q+#D", field
);
5028 /* Structure holding the current initializer being processed by reshape_init.
5029 CUR is a pointer to the current element being processed, END is a pointer
5030 after the last element present in the initializer. */
5031 typedef struct reshape_iterator_t
5033 constructor_elt
*cur
;
5034 constructor_elt
*end
;
5037 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5039 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5040 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5041 initialized. If there are no more such fields, the return value
5045 next_initializable_field (tree field
)
5048 && (TREE_CODE (field
) != FIELD_DECL
5049 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5050 || DECL_ARTIFICIAL (field
)))
5051 field
= DECL_CHAIN (field
);
5056 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5057 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5058 INTEGER_CST representing the size of the array minus one (the maximum index),
5059 or NULL_TREE if the array was declared without specifying the size. D is
5060 the iterator within the constructor. */
5063 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5064 tsubst_flags_t complain
)
5067 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5068 unsigned HOST_WIDE_INT max_index_cst
= 0;
5069 unsigned HOST_WIDE_INT index
;
5071 /* The initializer for an array is always a CONSTRUCTOR. */
5072 new_init
= build_constructor (init_list_type_node
, NULL
);
5076 /* Minus 1 is used for zero sized arrays. */
5077 if (integer_all_onesp (max_index
))
5080 if (host_integerp (max_index
, 1))
5081 max_index_cst
= tree_low_cst (max_index
, 1);
5082 /* sizetype is sign extended, not zero extended. */
5084 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5088 /* Loop until there are no more initializers. */
5090 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5094 constructor_elt
*old_cur
= d
->cur
;
5096 check_array_designated_initializer (d
->cur
, index
);
5097 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5099 if (elt_init
== error_mark_node
)
5100 return error_mark_node
;
5101 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5102 size_int (index
), elt_init
);
5103 if (!TREE_CONSTANT (elt_init
))
5104 TREE_CONSTANT (new_init
) = false;
5106 /* This can happen with an invalid initializer (c++/54501). */
5107 if (d
->cur
== old_cur
&& !sized_array_p
)
5114 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5115 Parameters are the same of reshape_init_r. */
5118 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5120 tree max_index
= NULL_TREE
;
5122 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5124 if (TYPE_DOMAIN (type
))
5125 max_index
= array_type_nelts (type
);
5127 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5130 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5131 Parameters are the same of reshape_init_r. */
5134 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5136 tree max_index
= NULL_TREE
;
5138 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5140 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5142 tree value
= d
->cur
->value
;
5143 if (!same_type_p (TREE_TYPE (value
), type
))
5145 if (complain
& tf_error
)
5146 error ("invalid type %qT as initializer for a vector of type %qT",
5147 TREE_TYPE (d
->cur
->value
), type
);
5148 value
= error_mark_node
;
5154 /* For a vector, we initialize it as an array of the appropriate size. */
5155 if (TREE_CODE (type
) == VECTOR_TYPE
)
5156 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5158 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5161 /* Subroutine of reshape_init_r, processes the initializers for classes
5162 or union. Parameters are the same of reshape_init_r. */
5165 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5166 tsubst_flags_t complain
)
5171 gcc_assert (CLASS_TYPE_P (type
));
5173 /* The initializer for a class is always a CONSTRUCTOR. */
5174 new_init
= build_constructor (init_list_type_node
, NULL
);
5175 field
= next_initializable_field (TYPE_FIELDS (type
));
5181 An initializer for an aggregate member that is an
5182 empty class shall have the form of an empty
5183 initializer-list {}. */
5184 if (!first_initializer_p
)
5186 if (complain
& tf_error
)
5187 error ("initializer for %qT must be brace-enclosed", type
);
5188 return error_mark_node
;
5193 /* Loop through the initializable fields, gathering initializers. */
5194 while (d
->cur
!= d
->end
)
5197 constructor_elt
*old_cur
= d
->cur
;
5199 /* Handle designated initializers, as an extension. */
5202 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5204 if (complain
& tf_error
)
5205 error ("%<[%E] =%> used in a GNU-style designated initializer"
5206 " for class %qT", d
->cur
->index
, type
);
5207 return error_mark_node
;
5210 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5211 /* We already reshaped this. */
5212 gcc_assert (d
->cur
->index
== field
);
5214 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5216 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5218 if (complain
& tf_error
)
5219 error ("%qT has no non-static data member named %qD", type
,
5221 return error_mark_node
;
5225 /* If we processed all the member of the class, we are done. */
5229 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5230 /*first_initializer_p=*/false, complain
);
5231 if (field_init
== error_mark_node
)
5232 return error_mark_node
;
5234 if (d
->cur
== old_cur
&& d
->cur
->index
)
5236 /* This can happen with an invalid initializer for a flexible
5237 array member (c++/54441). */
5238 if (complain
& tf_error
)
5239 error ("invalid initializer for %q#D", field
);
5240 return error_mark_node
;
5243 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5247 When a union is initialized with a brace-enclosed
5248 initializer, the braces shall only contain an
5249 initializer for the first member of the union. */
5250 if (TREE_CODE (type
) == UNION_TYPE
)
5253 field
= next_initializable_field (DECL_CHAIN (field
));
5259 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5260 designators are not valid; either complain or return true to indicate
5261 that reshape_init_r should return error_mark_node. */
5264 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5268 if (complain
& tf_error
)
5269 error ("C99 designator %qE outside aggregate initializer",
5277 /* Subroutine of reshape_init, which processes a single initializer (part of
5278 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5279 iterator within the CONSTRUCTOR which points to the initializer to process.
5280 FIRST_INITIALIZER_P is true if this is the first initializer of the
5281 outermost CONSTRUCTOR node. */
5284 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5285 tsubst_flags_t complain
)
5287 tree init
= d
->cur
->value
;
5289 if (error_operand_p (init
))
5290 return error_mark_node
;
5292 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5293 && has_designator_problem (d
, complain
))
5294 return error_mark_node
;
5296 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5298 /* A complex type can be initialized from one or two initializers,
5299 but braces are not elided. */
5301 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5303 if (CONSTRUCTOR_NELTS (init
) > 2)
5305 if (complain
& tf_error
)
5306 error ("too many initializers for %qT", type
);
5308 return error_mark_node
;
5311 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5313 vec
<constructor_elt
, va_gc
> *v
= 0;
5314 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5315 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5316 if (has_designator_problem (d
, complain
))
5317 return error_mark_node
;
5319 init
= build_constructor (init_list_type_node
, v
);
5324 /* A non-aggregate type is always initialized with a single
5326 if (!CP_AGGREGATE_TYPE_P (type
))
5328 /* It is invalid to initialize a non-aggregate type with a
5329 brace-enclosed initializer before C++0x.
5330 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5331 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5332 a CONSTRUCTOR (with a record type). */
5333 if (TREE_CODE (init
) == CONSTRUCTOR
5334 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5336 if (SCALAR_TYPE_P (type
))
5338 if (complain
& tf_error
)
5339 error ("braces around scalar initializer for type %qT", type
);
5340 init
= error_mark_node
;
5343 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5352 All implicit type conversions (clause _conv_) are considered when
5353 initializing the aggregate member with an initializer from an
5354 initializer-list. If the initializer can initialize a member,
5355 the member is initialized. Otherwise, if the member is itself a
5356 non-empty subaggregate, brace elision is assumed and the
5357 initializer is considered for the initialization of the first
5358 member of the subaggregate. */
5359 if (TREE_CODE (init
) != CONSTRUCTOR
5360 /* But don't try this for the first initializer, since that would be
5361 looking through the outermost braces; A a2 = { a1 }; is not a
5362 valid aggregate initialization. */
5363 && !first_initializer_p
5364 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5365 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5372 /* [dcl.init.string]
5374 A char array (whether plain char, signed char, or unsigned char)
5375 can be initialized by a string-literal (optionally enclosed in
5376 braces); a wchar_t array can be initialized by a wide
5377 string-literal (optionally enclosed in braces). */
5378 if (TREE_CODE (type
) == ARRAY_TYPE
5379 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5381 tree str_init
= init
;
5383 /* Strip one level of braces if and only if they enclose a single
5384 element (as allowed by [dcl.init.string]). */
5385 if (!first_initializer_p
5386 && TREE_CODE (str_init
) == CONSTRUCTOR
5387 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5389 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5392 /* If it's a string literal, then it's the initializer for the array
5393 as a whole. Otherwise, continue with normal initialization for
5394 array types (one value per array element). */
5395 if (TREE_CODE (str_init
) == STRING_CST
)
5397 if (has_designator_problem (d
, complain
))
5398 return error_mark_node
;
5404 /* The following cases are about aggregates. If we are not within a full
5405 initializer already, and there is not a CONSTRUCTOR, it means that there
5406 is a missing set of braces (that is, we are processing the case for
5407 which reshape_init exists). */
5408 if (!first_initializer_p
)
5410 if (TREE_CODE (init
) == CONSTRUCTOR
)
5412 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5413 /* There is no need to reshape pointer-to-member function
5414 initializers, as they are always constructed correctly
5415 by the front end. */
5417 else if (COMPOUND_LITERAL_P (init
))
5418 /* For a nested compound literal, there is no need to reshape since
5419 brace elision is not allowed. Even if we decided to allow it,
5420 we should add a call to reshape_init in finish_compound_literal,
5421 before calling digest_init, so changing this code would still
5422 not be necessary. */
5423 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5427 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5428 return reshape_init (type
, init
, complain
);
5432 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5436 /* Dispatch to specialized routines. */
5437 if (CLASS_TYPE_P (type
))
5438 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5439 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5440 return reshape_init_array (type
, d
, complain
);
5441 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5442 return reshape_init_vector (type
, d
, complain
);
5447 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5448 brace-enclosed aggregate initializer.
5450 INIT is the CONSTRUCTOR containing the list of initializers describing
5451 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5452 It may not presently match the shape of the TYPE; for example:
5454 struct S { int a; int b; };
5455 struct S a[] = { 1, 2, 3, 4 };
5457 Here INIT will hold a vector of four elements, rather than a
5458 vector of two elements, each itself a vector of two elements. This
5459 routine transforms INIT from the former form into the latter. The
5460 revised CONSTRUCTOR node is returned. */
5463 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5465 vec
<constructor_elt
, va_gc
> *v
;
5469 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5471 v
= CONSTRUCTOR_ELTS (init
);
5473 /* An empty constructor does not need reshaping, and it is always a valid
5475 if (vec_safe_is_empty (v
))
5478 /* Recurse on this CONSTRUCTOR. */
5480 d
.end
= d
.cur
+ v
->length ();
5482 new_init
= reshape_init_r (type
, &d
, true, complain
);
5483 if (new_init
== error_mark_node
)
5484 return error_mark_node
;
5486 /* Make sure all the element of the constructor were used. Otherwise,
5487 issue an error about exceeding initializers. */
5490 if (complain
& tf_error
)
5491 error ("too many initializers for %qT", type
);
5493 return error_mark_node
;
5499 /* Verify array initializer. Returns true if errors have been reported. */
5502 check_array_initializer (tree decl
, tree type
, tree init
)
5504 tree element_type
= TREE_TYPE (type
);
5506 /* The array type itself need not be complete, because the
5507 initializer may tell us how many elements are in the array.
5508 But, the elements of the array must be complete. */
5509 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5512 error ("elements of array %q#D have incomplete type", decl
);
5514 error ("elements of array %q#T have incomplete type", type
);
5517 /* A compound literal can't have variable size. */
5519 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5520 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5522 error ("variable-sized compound literal");
5528 /* Subroutine of check_initializer; args are passed down from that function.
5529 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5532 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5535 gcc_assert (stmts_are_full_exprs_p ());
5536 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5539 /* Verify INIT (the initializer for DECL), and record the
5540 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5541 grok_reference_init.
5543 If the return value is non-NULL, it is an expression that must be
5544 evaluated dynamically to initialize DECL. */
5547 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5549 tree type
= TREE_TYPE (decl
);
5550 tree init_code
= NULL
;
5551 tree extra_init
= NULL_TREE
;
5554 /* Things that are going to be initialized need to have complete
5556 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5558 if (DECL_HAS_VALUE_EXPR_P (decl
))
5560 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5561 it doesn't have storage to be initialized. */
5562 gcc_assert (init
== NULL_TREE
);
5566 if (type
== error_mark_node
)
5567 /* We will have already complained. */
5570 if (TREE_CODE (type
) == ARRAY_TYPE
)
5572 if (check_array_initializer (decl
, type
, init
))
5575 else if (!COMPLETE_TYPE_P (type
))
5577 error ("%q#D has incomplete type", decl
);
5578 TREE_TYPE (decl
) = error_mark_node
;
5582 /* There is no way to make a variable-sized class type in GNU C++. */
5583 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5585 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5587 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5588 if (SCALAR_TYPE_P (type
))
5592 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5593 init
= build_zero_init (type
, NULL_TREE
, false);
5595 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5597 error ("scalar object %qD requires one element in initializer",
5599 TREE_TYPE (decl
) = error_mark_node
;
5605 if (TREE_CODE (decl
) == CONST_DECL
)
5607 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5609 DECL_INITIAL (decl
) = init
;
5611 gcc_assert (init
!= NULL_TREE
);
5614 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5616 else if (init
|| type_build_ctor_call (type
)
5617 || TREE_CODE (type
) == REFERENCE_TYPE
)
5619 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5621 init
= grok_reference_init (decl
, type
, init
, flags
);
5622 flags
|= LOOKUP_ALREADY_DIGESTED
;
5625 check_for_uninitialized_const_var (decl
);
5626 /* Do not reshape constructors of vectors (they don't need to be
5628 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5630 if (is_std_init_list (type
))
5632 init
= perform_implicit_conversion (type
, init
,
5633 tf_warning_or_error
);
5634 flags
|= LOOKUP_ALREADY_DIGESTED
;
5636 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5638 /* Don't reshape if the class has constructors. */
5639 if (cxx_dialect
== cxx98
)
5640 error ("in C++98 %qD must be initialized by constructor, "
5644 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5646 error ("opaque vector types cannot be initialized");
5647 init
= error_mark_node
;
5651 init
= reshape_init (type
, init
, tf_warning_or_error
);
5652 if (SCALAR_TYPE_P (type
))
5653 check_narrowing (type
, init
);
5657 /* If DECL has an array type without a specific bound, deduce the
5658 array size from the initializer. */
5659 maybe_deduce_size_from_array_init (decl
, init
);
5660 type
= TREE_TYPE (decl
);
5661 if (type
== error_mark_node
)
5664 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5665 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5666 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5667 && CP_AGGREGATE_TYPE_P (type
)
5668 && (CLASS_TYPE_P (type
)
5669 || type_has_extended_temps (type
))))
5671 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5673 /* A constructor call is a non-trivial initializer even if
5674 it isn't explicitly written. */
5675 if (TREE_SIDE_EFFECTS (init_code
))
5676 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5678 /* If this is a constexpr initializer, expand_default_init will
5679 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5680 case, pull the initializer back out and pass it down into
5681 store_init_value. */
5682 while (TREE_CODE (init_code
) == EXPR_STMT
5683 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5684 init_code
= TREE_OPERAND (init_code
, 0);
5685 if (TREE_CODE (init_code
) == INIT_EXPR
)
5687 init
= TREE_OPERAND (init_code
, 1);
5688 init_code
= NULL_TREE
;
5689 /* Don't call digest_init; it's unnecessary and will complain
5690 about aggregate initialization of non-aggregate classes. */
5691 flags
|= LOOKUP_ALREADY_DIGESTED
;
5693 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5695 /* Declared constexpr, but no suitable initializer; massage
5696 init appropriately so we can pass it into store_init_value
5698 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5699 init
= finish_compound_literal (type
, init
,
5700 tf_warning_or_error
);
5701 else if (CLASS_TYPE_P (type
)
5702 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5704 init
= build_functional_cast (type
, init
, tf_none
);
5705 if (TREE_CODE (init
) == TARGET_EXPR
)
5706 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5708 init_code
= NULL_TREE
;
5714 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5716 /* In aggregate initialization of a variable, each element
5717 initialization is a full-expression because there is no
5718 enclosing expression. */
5719 gcc_assert (stmts_are_full_exprs_p ());
5721 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5723 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5724 && DECL_INITIAL (decl
)
5725 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5726 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5727 warning (0, "array %qD initialized by parenthesized string literal %qE",
5728 decl
, DECL_INITIAL (decl
));
5734 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5735 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5736 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5737 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5740 check_for_uninitialized_const_var (decl
);
5743 if (init
&& init
!= error_mark_node
)
5744 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5747 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5749 if (init_code
&& DECL_IN_AGGR_P (decl
))
5751 static int explained
= 0;
5753 if (cxx_dialect
< cxx0x
)
5754 error ("initializer invalid for static member with constructor");
5756 error ("non-constant in-class initialization invalid for static "
5757 "member %qD", decl
);
5760 error ("(an out of class initialization is required)");
5768 /* If DECL is not a local variable, give it RTL. */
5771 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5773 int toplev
= toplevel_bindings_p ();
5775 const char *filename
;
5777 /* Set the DECL_ASSEMBLER_NAME for the object. */
5780 /* The `register' keyword, when used together with an
5781 asm-specification, indicates that the variable should be
5782 placed in a particular register. */
5783 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5785 set_user_assembler_name (decl
, asmspec
);
5786 DECL_HARD_REGISTER (decl
) = 1;
5790 if (TREE_CODE (decl
) == FUNCTION_DECL
5791 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5792 set_builtin_user_assembler_name (decl
, asmspec
);
5793 set_user_assembler_name (decl
, asmspec
);
5797 /* Handle non-variables up front. */
5800 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5804 /* If we see a class member here, it should be a static data
5806 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5808 gcc_assert (TREE_STATIC (decl
));
5809 /* An in-class declaration of a static data member should be
5810 external; it is only a declaration, and not a definition. */
5811 if (init
== NULL_TREE
)
5812 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5815 /* We don't create any RTL for local variables. */
5816 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5819 /* We defer emission of local statics until the corresponding
5820 DECL_EXPR is expanded. */
5821 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5823 /* We try to defer namespace-scope static constants so that they are
5824 not emitted into the object file unnecessarily. */
5825 filename
= input_filename
;
5826 if (!DECL_VIRTUAL_P (decl
)
5827 && TREE_READONLY (decl
)
5828 && DECL_INITIAL (decl
) != NULL_TREE
5829 && DECL_INITIAL (decl
) != error_mark_node
5831 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5833 && !TREE_PUBLIC (decl
))
5835 /* Fool with the linkage of static consts according to #pragma
5837 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5838 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5840 TREE_PUBLIC (decl
) = 1;
5841 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5846 /* Likewise for template instantiations. */
5847 else if (DECL_LANG_SPECIFIC (decl
)
5848 && DECL_IMPLICIT_INSTANTIATION (decl
))
5851 /* If we're not deferring, go ahead and assemble the variable. */
5853 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5856 /* walk_tree helper for wrap_temporary_cleanups, below. */
5859 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5861 /* Stop at types or full-expression boundaries. */
5862 if (TYPE_P (*stmt_p
)
5863 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5869 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5871 tree guard
= (tree
)data
;
5872 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5874 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5875 /* Tell honor_protect_cleanup_actions to handle this as a separate
5877 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5879 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5885 /* We're initializing a local variable which has a cleanup GUARD. If there
5886 are any temporaries used in the initializer INIT of this variable, we
5887 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5888 variable will be cleaned up properly if one of them throws.
5890 Unfortunately, there's no way to express this properly in terms of
5891 nesting, as the regions for the temporaries overlap the region for the
5892 variable itself; if there are two temporaries, the variable needs to be
5893 the first thing destroyed if either of them throws. However, we only
5894 want to run the variable's cleanup if it actually got constructed. So
5895 we need to guard the temporary cleanups with the variable's cleanup if
5896 they are run on the normal path, but not if they are run on the
5897 exceptional path. We implement this by telling
5898 honor_protect_cleanup_actions to strip the variable cleanup from the
5899 exceptional path. */
5902 wrap_temporary_cleanups (tree init
, tree guard
)
5904 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5907 /* Generate code to initialize DECL (a local variable). */
5910 initialize_local_var (tree decl
, tree init
)
5912 tree type
= TREE_TYPE (decl
);
5916 gcc_assert (VAR_P (decl
)
5917 || TREE_CODE (decl
) == RESULT_DECL
);
5918 gcc_assert (!TREE_STATIC (decl
));
5920 if (DECL_SIZE (decl
) == NULL_TREE
)
5922 /* If we used it already as memory, it must stay in memory. */
5923 DECL_INITIAL (decl
) = NULL_TREE
;
5924 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5928 if (type
== error_mark_node
)
5931 /* Compute and store the initial value. */
5932 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5933 if (TREE_USED (type
))
5934 DECL_READ_P (decl
) = 1;
5936 /* Generate a cleanup, if necessary. */
5937 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5939 /* Perform the initialization. */
5942 if (TREE_CODE (init
) == INIT_EXPR
5943 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5945 /* Stick simple initializers in DECL_INITIAL so that
5946 -Wno-init-self works (c++/34772). */
5947 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5948 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5952 int saved_stmts_are_full_exprs_p
;
5954 /* If we're only initializing a single object, guard the
5955 destructors of any temporaries used in its initializer with
5956 its destructor. This isn't right for arrays because each
5957 element initialization is a full-expression. */
5958 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5959 wrap_temporary_cleanups (init
, cleanup
);
5961 gcc_assert (building_stmt_list_p ());
5962 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5963 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5964 finish_expr_stmt (init
);
5965 current_stmt_tree ()->stmts_are_full_exprs_p
=
5966 saved_stmts_are_full_exprs_p
;
5970 /* Set this to 0 so we can tell whether an aggregate which was
5971 initialized was ever used. Don't do this if it has a
5972 destructor, so we don't complain about the 'resource
5973 allocation is initialization' idiom. Now set
5974 attribute((unused)) on types so decls of that type will be
5975 marked used. (see TREE_USED, above.) */
5976 if (TYPE_NEEDS_CONSTRUCTING (type
)
5978 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5979 && DECL_NAME (decl
))
5980 TREE_USED (decl
) = 0;
5981 else if (already_used
)
5982 TREE_USED (decl
) = 1;
5985 finish_decl_cleanup (decl
, cleanup
);
5988 /* DECL is a VAR_DECL for a compiler-generated variable with static
5989 storage duration (like a virtual table) whose initializer is a
5990 compile-time constant. Initialize the variable and provide it to the
5994 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
5997 gcc_assert (DECL_ARTIFICIAL (decl
));
5998 init
= build_constructor (TREE_TYPE (decl
), v
);
5999 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6000 DECL_INITIAL (decl
) = init
;
6001 DECL_INITIALIZED_P (decl
) = 1;
6002 determine_visibility (decl
);
6003 layout_var_decl (decl
);
6004 maybe_commonize_var (decl
);
6005 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6008 /* INIT is the initializer for a variable, as represented by the
6009 parser. Returns true iff INIT is type-dependent. */
6012 type_dependent_init_p (tree init
)
6014 if (TREE_CODE (init
) == TREE_LIST
)
6015 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6016 return any_type_dependent_elements_p (init
);
6017 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6018 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6020 vec
<constructor_elt
, va_gc
> *elts
;
6024 elts
= CONSTRUCTOR_ELTS (init
);
6025 nelts
= vec_safe_length (elts
);
6026 for (i
= 0; i
< nelts
; ++i
)
6027 if (type_dependent_init_p ((*elts
)[i
].value
))
6031 /* It must be a simple expression, e.g., int i = 3; */
6032 return type_dependent_expression_p (init
);
6037 /* INIT is the initializer for a variable, as represented by the
6038 parser. Returns true iff INIT is value-dependent. */
6041 value_dependent_init_p (tree init
)
6043 if (TREE_CODE (init
) == TREE_LIST
)
6044 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6045 return any_value_dependent_elements_p (init
);
6046 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6047 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6049 vec
<constructor_elt
, va_gc
> *elts
;
6053 elts
= CONSTRUCTOR_ELTS (init
);
6054 nelts
= vec_safe_length (elts
);
6055 for (i
= 0; i
< nelts
; ++i
)
6056 if (value_dependent_init_p ((*elts
)[i
].value
))
6060 /* It must be a simple expression, e.g., int i = 3; */
6061 return value_dependent_expression_p (init
);
6066 /* Finish processing of a declaration;
6067 install its line number and initial value.
6068 If the length of an array type is not known before,
6069 it must be determined now, from the initial value, or it is an error.
6071 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6072 true, then INIT is an integral constant expression.
6074 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6075 if the (init) syntax was used. */
6078 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6079 tree asmspec_tree
, int flags
)
6082 vec
<tree
, va_gc
> *cleanups
= NULL
;
6083 const char *asmspec
= NULL
;
6084 int was_readonly
= 0;
6085 bool var_definition_p
= false;
6088 if (decl
== error_mark_node
)
6093 error ("assignment (not initialization) in declaration");
6097 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6098 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6099 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6101 type
= TREE_TYPE (decl
);
6102 if (type
== error_mark_node
)
6105 /* If a name was specified, get the string. */
6106 if (at_namespace_scope_p ())
6107 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6108 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6109 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6111 if (current_class_type
6112 && CP_DECL_CONTEXT (decl
) == current_class_type
6113 && TYPE_BEING_DEFINED (current_class_type
)
6114 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6115 && (DECL_INITIAL (decl
) || init
))
6116 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6118 if (TREE_CODE (decl
) != FUNCTION_DECL
6119 && (auto_node
= type_uses_auto (type
)))
6122 if (init
== NULL_TREE
)
6124 if (DECL_LANG_SPECIFIC (decl
)
6125 && DECL_TEMPLATE_INSTANTIATION (decl
)
6126 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6128 /* init is null because we're deferring instantiating the
6129 initializer until we need it. Well, we need it now. */
6130 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6134 error ("declaration of %q#D has no initializer", decl
);
6135 TREE_TYPE (decl
) = error_mark_node
;
6139 if (TREE_CODE (d_init
) == TREE_LIST
)
6140 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6141 tf_warning_or_error
);
6142 d_init
= resolve_nondeduced_context (d_init
);
6143 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6145 if (type
== error_mark_node
)
6147 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6150 if (!ensure_literal_type_for_constexpr_object (decl
))
6151 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6154 && DECL_CLASS_SCOPE_P (decl
)
6155 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6156 check_static_variable_definition (decl
, type
);
6158 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6161 if (init
== ridpointers
[(int)RID_DELETE
])
6163 /* FIXME check this is 1st decl. */
6164 DECL_DELETED_FN (decl
) = 1;
6165 DECL_DECLARED_INLINE_P (decl
) = 1;
6166 DECL_INITIAL (decl
) = error_mark_node
;
6167 FOR_EACH_CLONE (clone
, decl
)
6169 DECL_DELETED_FN (clone
) = 1;
6170 DECL_DECLARED_INLINE_P (clone
) = 1;
6171 DECL_INITIAL (clone
) = error_mark_node
;
6175 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6177 if (defaultable_fn_check (decl
))
6178 DECL_DEFAULTED_FN (decl
) = 1;
6180 DECL_INITIAL (decl
) = NULL_TREE
;
6184 if (init
&& VAR_P (decl
))
6186 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6187 /* If DECL is a reference, then we want to know whether init is a
6188 reference constant; init_const_expr_p as passed tells us whether
6189 it's an rvalue constant. */
6190 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6191 init_const_expr_p
= potential_constant_expression (init
);
6192 if (init_const_expr_p
)
6194 /* Set these flags now for templates. We'll update the flags in
6195 store_init_value for instantiations. */
6196 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6197 if (decl_maybe_constant_var_p (decl
))
6198 TREE_CONSTANT (decl
) = 1;
6202 if (processing_template_decl
)
6204 bool type_dependent_p
;
6206 /* Add this declaration to the statement-tree. */
6207 if (at_function_scope_p ())
6208 add_decl_expr (decl
);
6210 type_dependent_p
= dependent_type_p (type
);
6212 if (check_for_bare_parameter_packs (init
))
6215 DECL_INITIAL (decl
) = NULL_TREE
;
6218 /* Generally, initializers in templates are expanded when the
6219 template is instantiated. But, if DECL is a variable constant
6220 then it can be used in future constant expressions, so its value
6221 must be available. */
6223 if (!VAR_P (decl
) || dependent_type_p (type
))
6224 /* We can't do anything if the decl has dependent type. */;
6226 && init_const_expr_p
6227 && !type_dependent_p
6228 && decl_maybe_constant_var_p (decl
)
6229 && !type_dependent_init_p (init
)
6230 && !value_dependent_init_p (init
))
6232 /* This variable seems to be a non-dependent constant, so process
6233 its initializer. If check_initializer returns non-null the
6234 initialization wasn't constant after all. */
6236 cleanups
= make_tree_vector ();
6237 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6238 if (init_code
== NULL_TREE
)
6240 release_tree_vector (cleanups
);
6242 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6244 /* Deduce array size even if the initializer is dependent. */
6245 maybe_deduce_size_from_array_init (decl
, init
);
6246 /* And complain about multiple initializers. */
6247 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6248 && !MAYBE_CLASS_TYPE_P (type
))
6249 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6250 tf_warning_or_error
);
6254 DECL_INITIAL (decl
) = init
;
6258 /* Just store non-static data member initializers for later. */
6259 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6260 DECL_INITIAL (decl
) = init
;
6262 /* Take care of TYPE_DECLs up front. */
6263 if (TREE_CODE (decl
) == TYPE_DECL
)
6265 if (type
!= error_mark_node
6266 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6268 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6269 warning (0, "shadowing previous type declaration of %q#D", decl
);
6270 set_identifier_type_value (DECL_NAME (decl
), decl
);
6273 /* If we have installed this as the canonical typedef for this
6274 type, and that type has not been defined yet, delay emitting
6275 the debug information for it, as we will emit it later. */
6276 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6277 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6278 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6280 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6285 /* A reference will be modified here, as it is initialized. */
6286 if (! DECL_EXTERNAL (decl
)
6287 && TREE_READONLY (decl
)
6288 && TREE_CODE (type
) == REFERENCE_TYPE
)
6291 TREE_READONLY (decl
) = 0;
6296 /* If this is a local variable that will need a mangled name,
6297 register it now. We must do this before processing the
6298 initializer for the variable, since the initialization might
6299 require a guard variable, and since the mangled name of the
6300 guard variable will depend on the mangled name of this
6302 if (DECL_FUNCTION_SCOPE_P (decl
)
6303 && TREE_STATIC (decl
)
6304 && !DECL_ARTIFICIAL (decl
))
6306 push_local_name (decl
);
6307 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6308 || DECL_DESTRUCTOR_P (current_function_decl
))
6309 /* Normally local_decls is populated during GIMPLE lowering,
6310 but [cd]tors are never actually compiled directly. We need
6311 to put statics on the list so we can deal with the label
6312 address extension. FIXME. */
6313 add_local_decl (cfun
, decl
);
6316 /* Convert the initializer to the type of DECL, if we have not
6317 already initialized DECL. */
6318 if (!DECL_INITIALIZED_P (decl
)
6319 /* If !DECL_EXTERNAL then DECL is being defined. In the
6320 case of a static data member initialized inside the
6321 class-specifier, there can be an initializer even if DECL
6322 is *not* defined. */
6323 && (!DECL_EXTERNAL (decl
) || init
))
6325 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6328 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6329 /* Allow libjava/prims.cc define primitive classes. */
6330 if (init
!= NULL_TREE
6331 || jclass
== NULL_TREE
6332 || TREE_CODE (jclass
) != TYPE_DECL
6333 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6334 || !same_type_ignoring_top_level_qualifiers_p
6335 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6336 error ("Java object %qD not allocated with %<new%>", decl
);
6339 cleanups
= make_tree_vector ();
6340 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6342 /* Check that the initializer for a static data member was a
6343 constant. Although we check in the parser that the
6344 initializer is an integral constant expression, we do not
6345 simplify division-by-zero at the point at which it
6346 occurs. Therefore, in:
6348 struct S { static const int i = 7 / 0; };
6350 we issue an error at this point. It would
6351 probably be better to forbid division by zero in
6352 integral constant expressions. */
6353 if (DECL_EXTERNAL (decl
) && init
)
6355 error ("%qD cannot be initialized by a non-constant expression"
6356 " when being declared", decl
);
6357 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6365 The memory occupied by any object of static storage
6366 duration is zero-initialized at program startup before
6367 any other initialization takes place.
6369 We cannot create an appropriate initializer until after
6370 the type of DECL is finalized. If DECL_INITIAL is set,
6371 then the DECL is statically initialized, and any
6372 necessary zero-initialization has already been performed. */
6373 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6374 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6375 /*nelts=*/NULL_TREE
,
6376 /*static_storage_p=*/true);
6377 /* Remember that the initialization for this variable has
6379 DECL_INITIALIZED_P (decl
) = 1;
6380 /* This declaration is the definition of this variable,
6381 unless we are initializing a static data member within
6382 the class specifier. */
6383 if (!DECL_EXTERNAL (decl
))
6384 var_definition_p
= true;
6386 /* If the variable has an array type, lay out the type, even if
6387 there is no initializer. It is valid to index through the
6388 array, and we must get TYPE_ALIGN set correctly on the array
6390 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6393 if (TREE_STATIC (decl
)
6394 && !at_function_scope_p ()
6395 && current_function_decl
== NULL
)
6396 /* So decl is a global variable or a static member of a
6397 non local class. Record the types it uses
6398 so that we can decide later to emit debug info for them. */
6399 record_types_used_by_current_var_decl (decl
);
6401 else if (TREE_CODE (decl
) == FIELD_DECL
6402 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6403 error ("non-static data member %qD has Java class type", decl
);
6405 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
6407 /* If the VLA bound is larger than half the address space, or less
6408 than zero, throw std::bad_array_length. */
6409 tree max
= convert (ssizetype
, TYPE_MAX_VALUE (TYPE_DOMAIN (type
)));
6410 /* C++1y says we should throw for length <= 0, but we have
6411 historically supported zero-length arrays. Let's treat that as an
6412 extension to be disabled by -std=c++NN. */
6413 int lower
= flag_iso
? 0 : -1;
6414 tree comp
= build2 (LT_EXPR
, boolean_type_node
, max
, ssize_int (lower
));
6415 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
6416 throw_bad_array_length (), void_zero_node
);
6417 finish_expr_stmt (comp
);
6420 /* Add this declaration to the statement-tree. This needs to happen
6421 after the call to check_initializer so that the DECL_EXPR for a
6422 reference temp is added before the DECL_EXPR for the reference itself. */
6423 if (DECL_FUNCTION_SCOPE_P (decl
))
6424 add_decl_expr (decl
);
6426 /* Let the middle end know about variables and functions -- but not
6427 static data members in uninstantiated class templates. */
6428 if (VAR_OR_FUNCTION_DECL_P (decl
))
6432 layout_var_decl (decl
);
6433 maybe_commonize_var (decl
);
6436 /* This needs to happen after the linkage is set. */
6437 determine_visibility (decl
);
6439 if (var_definition_p
&& TREE_STATIC (decl
))
6441 /* If a TREE_READONLY variable needs initialization
6442 at runtime, it is no longer readonly and we need to
6443 avoid MEM_READONLY_P being set on RTL created for it. */
6446 if (TREE_READONLY (decl
))
6447 TREE_READONLY (decl
) = 0;
6450 else if (was_readonly
)
6451 TREE_READONLY (decl
) = 1;
6453 /* Likewise if it needs destruction. */
6454 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6455 TREE_READONLY (decl
) = 0;
6458 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6460 /* Check for abstractness of the type. Notice that there is no
6461 need to strip array types here since the check for those types
6462 is already done within create_array_type_for_decl. */
6463 abstract_virtuals_error (decl
, type
);
6465 if (TREE_TYPE (decl
) == error_mark_node
)
6466 /* No initialization required. */
6468 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6472 if (init
== ridpointers
[(int)RID_DEFAULT
])
6474 /* An out-of-class default definition is defined at
6475 the point where it is explicitly defaulted. */
6476 if (DECL_DELETED_FN (decl
))
6477 maybe_explain_implicit_delete (decl
);
6478 else if (DECL_INITIAL (decl
) == error_mark_node
)
6479 synthesize_method (decl
);
6482 error ("function %q#D is initialized like a variable", decl
);
6484 /* else no initialization required. */
6486 else if (DECL_EXTERNAL (decl
)
6487 && ! (DECL_LANG_SPECIFIC (decl
)
6488 && DECL_NOT_REALLY_EXTERN (decl
)))
6491 DECL_INITIAL (decl
) = init
;
6493 /* A variable definition. */
6494 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6495 /* Initialize the local variable. */
6496 initialize_local_var (decl
, init
);
6498 /* If a variable is defined, and then a subsequent
6499 definition with external linkage is encountered, we will
6500 get here twice for the same variable. We want to avoid
6501 calling expand_static_init more than once. For variables
6502 that are not static data members, we can call
6503 expand_static_init only when we actually process the
6504 initializer. It is not legal to redeclare a static data
6505 member, so this issue does not arise in that case. */
6506 else if (var_definition_p
&& TREE_STATIC (decl
))
6507 expand_static_init (decl
, init
);
6510 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6511 reference, insert it in the statement-tree now. */
6515 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6516 push_cleanup (decl
, t
, false);
6517 release_tree_vector (cleanups
);
6521 TREE_READONLY (decl
) = 1;
6523 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6526 /* Returns a declaration for a VAR_DECL as if:
6528 extern "C" TYPE NAME;
6530 had been seen. Used to create compiler-generated global
6534 declare_global_var (tree name
, tree type
)
6538 push_to_top_level ();
6539 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6540 TREE_PUBLIC (decl
) = 1;
6541 DECL_EXTERNAL (decl
) = 1;
6542 DECL_ARTIFICIAL (decl
) = 1;
6543 /* If the user has explicitly declared this variable (perhaps
6544 because the code we are compiling is part of a low-level runtime
6545 library), then it is possible that our declaration will be merged
6546 with theirs by pushdecl. */
6547 decl
= pushdecl (decl
);
6548 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6549 pop_from_top_level ();
6554 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6555 if "__cxa_atexit" is not being used) corresponding to the function
6556 to be called when the program exits. */
6559 get_atexit_fn_ptr_type (void)
6563 if (!atexit_fn_ptr_type_node
)
6566 if (flag_use_cxa_atexit
6567 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6568 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6569 arg_type
= ptr_type_node
;
6571 /* The parameter to "atexit" is "void (*)(void)". */
6572 arg_type
= NULL_TREE
;
6574 fn_type
= build_function_type_list (void_type_node
,
6575 arg_type
, NULL_TREE
);
6576 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6579 return atexit_fn_ptr_type_node
;
6582 /* Returns a pointer to the `atexit' function. Note that if
6583 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6584 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6587 get_atexit_node (void)
6593 bool use_aeabi_atexit
;
6598 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6600 /* The declaration for `__cxa_atexit' is:
6602 int __cxa_atexit (void (*)(void *), void *, void *)
6604 We build up the argument types and then the function type
6606 tree argtype0
, argtype1
, argtype2
;
6608 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6609 /* First, build the pointer-to-function type for the first
6611 fn_ptr_type
= get_atexit_fn_ptr_type ();
6612 /* Then, build the rest of the argument types. */
6613 argtype2
= ptr_type_node
;
6614 if (use_aeabi_atexit
)
6616 argtype1
= fn_ptr_type
;
6617 argtype0
= ptr_type_node
;
6621 argtype1
= ptr_type_node
;
6622 argtype0
= fn_ptr_type
;
6624 /* And the final __cxa_atexit type. */
6625 fn_type
= build_function_type_list (integer_type_node
,
6626 argtype0
, argtype1
, argtype2
,
6628 if (use_aeabi_atexit
)
6629 name
= "__aeabi_atexit";
6631 name
= "__cxa_atexit";
6635 /* The declaration for `atexit' is:
6637 int atexit (void (*)());
6639 We build up the argument types and then the function type
6641 fn_ptr_type
= get_atexit_fn_ptr_type ();
6642 /* Build the final atexit type. */
6643 fn_type
= build_function_type_list (integer_type_node
,
6644 fn_ptr_type
, NULL_TREE
);
6648 /* Now, build the function declaration. */
6649 push_lang_context (lang_name_c
);
6650 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6651 mark_used (atexit_fndecl
);
6652 pop_lang_context ();
6653 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6658 /* Like get_atexit_node, but for thread-local cleanups. */
6661 get_thread_atexit_node (void)
6663 /* The declaration for `__cxa_thread_atexit' is:
6665 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6666 tree fn_type
= build_function_type_list (integer_type_node
,
6667 get_atexit_fn_ptr_type (),
6668 ptr_type_node
, ptr_type_node
,
6671 /* Now, build the function declaration. */
6672 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
);
6673 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6676 /* Returns the __dso_handle VAR_DECL. */
6679 get_dso_handle_node (void)
6681 if (dso_handle_node
)
6682 return dso_handle_node
;
6684 /* Declare the variable. */
6685 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6688 #ifdef HAVE_GAS_HIDDEN
6689 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6690 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6693 return dso_handle_node
;
6696 /* Begin a new function with internal linkage whose job will be simply
6697 to destroy some particular variable. */
6699 static GTY(()) int start_cleanup_cnt
;
6702 start_cleanup_fn (void)
6707 bool use_cxa_atexit
= flag_use_cxa_atexit
6708 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6710 push_to_top_level ();
6712 /* No need to mangle this. */
6713 push_lang_context (lang_name_c
);
6715 /* Build the name of the function. */
6716 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6717 /* Build the function declaration. */
6718 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6719 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6720 /* It's a function with internal linkage, generated by the
6722 TREE_PUBLIC (fndecl
) = 0;
6723 DECL_ARTIFICIAL (fndecl
) = 1;
6724 /* Make the function `inline' so that it is only emitted if it is
6725 actually needed. It is unlikely that it will be inlined, since
6726 it is only called via a function pointer, but we avoid unnecessary
6727 emissions this way. */
6728 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6729 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6730 /* Build the parameter. */
6735 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6736 DECL_CONTEXT (parmdecl
) = fndecl
;
6737 TREE_USED (parmdecl
) = 1;
6738 DECL_READ_P (parmdecl
) = 1;
6739 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6743 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6745 pop_lang_context ();
6747 return current_function_decl
;
6750 /* Finish the cleanup function begun by start_cleanup_fn. */
6753 end_cleanup_fn (void)
6755 expand_or_defer_fn (finish_function (0));
6757 pop_from_top_level ();
6760 /* Generate code to handle the destruction of DECL, an object with
6761 static storage duration. */
6764 register_dtor_fn (tree decl
)
6771 bool ob_parm
, dso_parm
, use_dtor
;
6772 tree arg0
, arg1
, arg2
;
6775 type
= TREE_TYPE (decl
);
6776 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6777 return void_zero_node
;
6779 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6780 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6781 destructor to "__cxa_atexit"; we don't have to build a temporary
6782 function to do the cleanup. */
6783 dso_parm
= (flag_use_cxa_atexit
6784 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6785 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6786 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6791 /* Find the destructor. */
6792 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6793 gcc_assert (idx
>= 0);
6794 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6795 /* Make sure it is accessible. */
6796 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6797 tf_warning_or_error
);
6801 /* Call build_cleanup before we enter the anonymous function so
6802 that any access checks will be done relative to the current
6803 scope, rather than the scope of the anonymous function. */
6804 build_cleanup (decl
);
6806 /* Now start the function. */
6807 cleanup
= start_cleanup_fn ();
6809 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6810 to the original function, rather than the anonymous one. That
6811 will make the back end think that nested functions are in use,
6812 which causes confusion. */
6813 push_deferring_access_checks (dk_no_check
);
6814 fcall
= build_cleanup (decl
);
6815 pop_deferring_access_checks ();
6817 /* Create the body of the anonymous function. */
6818 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6819 finish_expr_stmt (fcall
);
6820 finish_compound_stmt (compound_stmt
);
6824 /* Call atexit with the cleanup function. */
6825 mark_used (cleanup
);
6826 cleanup
= build_address (cleanup
);
6828 if (DECL_THREAD_LOCAL_P (decl
))
6829 atex_node
= get_thread_atexit_node ();
6831 atex_node
= get_atexit_node ();
6835 /* We must convert CLEANUP to the type that "__cxa_atexit"
6837 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6838 /* "__cxa_atexit" will pass the address of DECL to the
6839 cleanup function. */
6841 addr
= build_address (decl
);
6842 /* The declared type of the parameter to "__cxa_atexit" is
6843 "void *". For plain "T*", we could just let the
6844 machinery in cp_build_function_call convert it -- but if the
6845 type is "cv-qualified T *", then we need to convert it
6846 before passing it in, to avoid spurious errors. */
6847 addr
= build_nop (ptr_type_node
, addr
);
6850 /* Since the cleanup functions we build ignore the address
6851 they're given, there's no reason to pass the actual address
6852 in, and, in general, it's cheaper to pass NULL than any
6854 addr
= null_pointer_node
;
6857 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6858 tf_warning_or_error
);
6860 /* Just pass NULL to the dso handle parm if we don't actually
6861 have a DSO handle on this target. */
6862 arg2
= null_pointer_node
;
6868 if (!DECL_THREAD_LOCAL_P (decl
)
6869 && targetm
.cxx
.use_aeabi_atexit ())
6885 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6886 arg0
, arg1
, arg2
, NULL_TREE
);
6889 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6890 is its initializer. Generate code to handle the construction
6891 and destruction of DECL. */
6894 expand_static_init (tree decl
, tree init
)
6896 gcc_assert (VAR_P (decl
));
6897 gcc_assert (TREE_STATIC (decl
));
6899 /* Some variables require no dynamic initialization. */
6901 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6904 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6905 && !DECL_FUNCTION_SCOPE_P (decl
))
6908 error ("non-local variable %qD declared %<__thread%> "
6909 "needs dynamic initialization", decl
);
6911 error ("non-local variable %qD declared %<__thread%> "
6912 "has a non-trivial destructor", decl
);
6913 static bool informed
;
6916 inform (DECL_SOURCE_LOCATION (decl
),
6917 "C++11 %<thread_local%> allows dynamic initialization "
6924 if (DECL_FUNCTION_SCOPE_P (decl
))
6926 /* Emit code to perform this initialization but once. */
6927 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6928 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6929 tree guard
, guard_addr
;
6931 /* We don't need thread-safety code for thread-local vars. */
6932 bool thread_guard
= (flag_threadsafe_statics
6933 && !DECL_THREAD_LOCAL_P (decl
));
6935 /* Emit code to perform this initialization but once. This code
6938 static <type> guard;
6939 if (!guard.first_byte) {
6940 if (__cxa_guard_acquire (&guard)) {
6943 // Do initialization.
6944 flag = true; __cxa_guard_release (&guard);
6945 // Register variable for destruction at end of program.
6947 if (!flag) __cxa_guard_abort (&guard);
6951 Note that the `flag' variable is only set to 1 *after* the
6952 initialization is complete. This ensures that an exception,
6953 thrown during the construction, will cause the variable to
6954 reinitialized when we pass through this code again, as per:
6958 If the initialization exits by throwing an exception, the
6959 initialization is not complete, so it will be tried again
6960 the next time control enters the declaration.
6962 This process should be thread-safe, too; multiple threads
6963 should not be able to initialize the variable more than
6966 /* Create the guard variable. */
6967 guard
= get_guard (decl
);
6969 /* This optimization isn't safe on targets with relaxed memory
6970 consistency. On such targets we force synchronization in
6971 __cxa_guard_acquire. */
6972 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6974 /* Begin the conditional initialization. */
6975 if_stmt
= begin_if_stmt ();
6976 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6977 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6982 tree vfntype
= NULL_TREE
;
6983 tree acquire_name
, release_name
, abort_name
;
6984 tree acquire_fn
, release_fn
, abort_fn
;
6985 guard_addr
= build_address (guard
);
6987 acquire_name
= get_identifier ("__cxa_guard_acquire");
6988 release_name
= get_identifier ("__cxa_guard_release");
6989 abort_name
= get_identifier ("__cxa_guard_abort");
6990 acquire_fn
= identifier_global_value (acquire_name
);
6991 release_fn
= identifier_global_value (release_name
);
6992 abort_fn
= identifier_global_value (abort_name
);
6994 acquire_fn
= push_library_fn
6995 (acquire_name
, build_function_type_list (integer_type_node
,
6996 TREE_TYPE (guard_addr
),
6999 if (!release_fn
|| !abort_fn
)
7000 vfntype
= build_function_type_list (void_type_node
,
7001 TREE_TYPE (guard_addr
),
7004 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
7006 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
7008 inner_if_stmt
= begin_if_stmt ();
7009 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7012 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7013 begin
= get_target_expr (boolean_false_node
);
7014 flag
= TARGET_EXPR_SLOT (begin
);
7016 TARGET_EXPR_CLEANUP (begin
)
7017 = build3 (COND_EXPR
, void_type_node
, flag
,
7019 build_call_n (abort_fn
, 1, guard_addr
));
7020 CLEANUP_EH_ONLY (begin
) = 1;
7022 /* Do the initialization itself. */
7023 init
= add_stmt_to_compound (begin
, init
);
7024 init
= add_stmt_to_compound
7025 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7026 init
= add_stmt_to_compound
7027 (init
, build_call_n (release_fn
, 1, guard_addr
));
7030 init
= add_stmt_to_compound (init
, set_guard (guard
));
7032 /* Use atexit to register a function for destroying this static
7034 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7036 finish_expr_stmt (init
);
7040 finish_compound_stmt (inner_then_clause
);
7041 finish_then_clause (inner_if_stmt
);
7042 finish_if_stmt (inner_if_stmt
);
7045 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7047 finish_compound_stmt (then_clause
);
7048 finish_then_clause (if_stmt
);
7049 finish_if_stmt (if_stmt
);
7052 else if (DECL_THREAD_LOCAL_P (decl
))
7053 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7055 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7059 /* Make TYPE a complete type based on INITIAL_VALUE.
7060 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7061 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7062 3 if the initializer list is empty (in pedantic mode). */
7065 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7068 tree type
, elt_type
;
7072 unsigned HOST_WIDE_INT i
;
7075 /* An array of character type can be initialized from a
7076 brace-enclosed string constant.
7078 FIXME: this code is duplicated from reshape_init. Probably
7079 we should just call reshape_init here? */
7080 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7081 && TREE_CODE (initial_value
) == CONSTRUCTOR
7082 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7084 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7085 tree value
= (*v
)[0].value
;
7087 if (TREE_CODE (value
) == STRING_CST
7088 && v
->length () == 1)
7089 initial_value
= value
;
7092 /* If any of the elements are parameter packs, we can't actually
7093 complete this type now because the array size is dependent. */
7094 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7096 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7099 if (PACK_EXPANSION_P (value
))
7105 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7107 /* We can create the array before the element type is complete, which
7108 means that we didn't have these two bits set in the original type
7109 either. In completing the type, we are expected to propagate these
7110 bits. See also complete_type which does the same thing for arrays
7113 if (TYPE_DOMAIN (type
))
7115 elt_type
= TREE_TYPE (type
);
7116 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7117 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7118 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7124 /* As above, but either give an error or reject zero-size arrays, depending
7128 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7129 bool do_default
, tsubst_flags_t complain
)
7132 bool sfinae
= !(complain
& tf_error
);
7133 /* In SFINAE context we can't be lenient about zero-size arrays. */
7136 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7142 /* Not an error. */;
7143 else if (failure
== 1)
7144 error ("initializer fails to determine size of %qT", *ptype
);
7145 else if (failure
== 2)
7148 error ("array size missing in %qT", *ptype
);
7150 else if (failure
== 3)
7151 error ("zero-size array %qT", *ptype
);
7152 *ptype
= error_mark_node
;
7157 /* Return zero if something is declared to be a member of type
7158 CTYPE when in the context of CUR_TYPE. STRING is the error
7159 message to print in that case. Otherwise, quietly return 1. */
7162 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7164 if (ctype
&& ctype
!= cur_type
)
7166 if (flags
== DTOR_FLAG
)
7167 error ("destructor for alien class %qT cannot be a member", ctype
);
7169 error ("constructor for alien class %qT cannot be a member", ctype
);
7175 /* Subroutine of `grokdeclarator'. */
7177 /* Generate errors possibly applicable for a given set of specifiers.
7178 This is for ARM $7.1.2. */
7181 bad_specifiers (tree object
,
7182 enum bad_spec_place type
,
7193 error ("%qD declared as a %<virtual%> variable", object
);
7195 error ("%qD declared as an %<inline%> variable", object
);
7197 error ("%<const%> and %<volatile%> function specifiers on "
7198 "%qD invalid in variable declaration", object
);
7202 error ("%qD declared as a %<virtual%> parameter", object
);
7204 error ("%qD declared as an %<inline%> parameter", object
);
7206 error ("%<const%> and %<volatile%> function specifiers on "
7207 "%qD invalid in parameter declaration", object
);
7211 error ("%qD declared as a %<virtual%> type", object
);
7213 error ("%qD declared as an %<inline%> type", object
);
7215 error ("%<const%> and %<volatile%> function specifiers on "
7216 "%qD invalid in type declaration", object
);
7220 error ("%qD declared as a %<virtual%> field", object
);
7222 error ("%qD declared as an %<inline%> field", object
);
7224 error ("%<const%> and %<volatile%> function specifiers on "
7225 "%qD invalid in field declaration", object
);
7231 error ("%q+D declared as a friend", object
);
7233 && (TREE_CODE (object
) == TYPE_DECL
7234 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7235 && !TYPE_REFFN_P (TREE_TYPE (object
))
7236 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7237 error ("%q+D declared with an exception specification", object
);
7240 /* DECL is a member function or static data member and is presently
7241 being defined. Check that the definition is taking place in a
7245 check_class_member_definition_namespace (tree decl
)
7247 /* These checks only apply to member functions and static data
7249 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7250 /* We check for problems with specializations in pt.c in
7251 check_specialization_namespace, where we can issue better
7253 if (processing_specialization
)
7255 /* There are no restrictions on the placement of
7256 explicit instantiations. */
7257 if (processing_explicit_instantiation
)
7261 A member function definition that appears outside of the
7262 class definition shall appear in a namespace scope enclosing
7263 the class definition.
7267 The definition for a static data member shall appear in a
7268 namespace scope enclosing the member's class definition. */
7269 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7270 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7271 decl
, DECL_CONTEXT (decl
));
7274 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7275 METHOD_TYPE for a non-static member function; QUALS are the
7276 cv-qualifiers that apply to the function. */
7279 build_this_parm (tree type
, cp_cv_quals quals
)
7284 cp_cv_quals this_quals
;
7286 if (CLASS_TYPE_P (type
))
7289 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7290 this_type
= build_pointer_type (this_type
);
7293 this_type
= type_of_this_parm (type
);
7294 /* The `this' parameter is implicitly `const'; it cannot be
7296 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7297 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7298 parm
= build_artificial_parm (this_identifier
, qual_type
);
7299 cp_apply_type_quals_to_decl (this_quals
, parm
);
7303 /* DECL is a static member function. Complain if it was declared
7304 with function-cv-quals. */
7307 check_static_quals (tree decl
, cp_cv_quals quals
)
7309 if (quals
!= TYPE_UNQUALIFIED
)
7310 error ("static member function %q#D declared with type qualifiers",
7314 /* CTYPE is class type, or null if non-class.
7315 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7317 DECLARATOR is the function's name.
7318 PARMS is a chain of PARM_DECLs for the function.
7319 VIRTUALP is truthvalue of whether the function is virtual or not.
7320 FLAGS are to be passed through to `grokclassfn'.
7321 QUALS are qualifiers indicating whether the function is `const'
7323 RAISES is a list of exceptions that this function can raise.
7324 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7325 not look, and -1 if we should not call `grokclassfn' at all.
7327 SFK is the kind of special function (if any) for the new function.
7329 Returns `NULL_TREE' if something goes wrong, after issuing
7330 applicable error messages. */
7333 grokfndecl (tree ctype
,
7337 tree orig_declarator
,
7339 enum overload_flags flags
,
7341 cp_ref_qualifier rqual
,
7347 special_function_kind sfk
,
7352 location_t location
)
7355 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7359 type
= build_ref_qualified_type (type
, rqual
);
7361 type
= build_exception_variant (type
, raises
);
7363 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7365 /* If we have an explicit location, use it, otherwise use whatever
7366 build_lang_decl used (probably input_location). */
7367 if (location
!= UNKNOWN_LOCATION
)
7368 DECL_SOURCE_LOCATION (decl
) = location
;
7370 if (TREE_CODE (type
) == METHOD_TYPE
)
7373 parm
= build_this_parm (type
, quals
);
7374 DECL_CHAIN (parm
) = parms
;
7377 DECL_ARGUMENTS (decl
) = parms
;
7378 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7379 DECL_CONTEXT (t
) = decl
;
7380 /* Propagate volatile out from type to decl. */
7381 if (TYPE_VOLATILE (type
))
7382 TREE_THIS_VOLATILE (decl
) = 1;
7384 /* Setup decl according to sfk. */
7387 case sfk_constructor
:
7388 case sfk_copy_constructor
:
7389 case sfk_move_constructor
:
7390 DECL_CONSTRUCTOR_P (decl
) = 1;
7392 case sfk_destructor
:
7393 DECL_DESTRUCTOR_P (decl
) = 1;
7399 /* If pointers to member functions use the least significant bit to
7400 indicate whether a function is virtual, ensure a pointer
7401 to this function will have that bit clear. */
7402 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7403 && TREE_CODE (type
) == METHOD_TYPE
7404 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7405 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7408 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7412 ("defining explicit specialization %qD in friend declaration",
7416 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7417 tree args
= TREE_OPERAND (orig_declarator
, 1);
7419 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7421 /* Something like `template <class T> friend void f<T>()'. */
7422 error ("invalid use of template-id %qD in declaration "
7423 "of primary template",
7429 /* A friend declaration of the form friend void f<>(). Record
7430 the information in the TEMPLATE_ID_EXPR. */
7431 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7433 if (TREE_CODE (fns
) == COMPONENT_REF
)
7435 /* Due to bison parser ickiness, we will have already looked
7436 up an operator_name or PFUNCNAME within the current class
7437 (see template_id in parse.y). If the current class contains
7438 such a name, we'll get a COMPONENT_REF here. Undo that. */
7440 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7441 == current_class_type
);
7442 fns
= TREE_OPERAND (fns
, 1);
7444 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7445 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7447 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7448 if (TREE_PURPOSE (t
)
7449 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7451 error ("default arguments are not allowed in declaration "
7452 "of friend template specialization %qD",
7458 error ("%<inline%> is not allowed in declaration of friend "
7459 "template specialization %qD",
7462 error ("%<constexpr%> is not allowed in declaration of friend "
7463 "template specialization %qD",
7470 /* If this decl has namespace scope, set that up. */
7472 set_decl_namespace (decl
, in_namespace
, friendp
);
7474 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7476 /* `main' and builtins have implicit 'C' linkage. */
7477 if ((MAIN_NAME_P (declarator
)
7478 || (IDENTIFIER_LENGTH (declarator
) > 10
7479 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7480 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7481 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7482 && current_lang_name
== lang_name_cplusplus
7483 && ctype
== NULL_TREE
7484 && DECL_FILE_SCOPE_P (decl
))
7485 SET_DECL_LANGUAGE (decl
, lang_c
);
7487 /* Should probably propagate const out from type to decl I bet (mrs). */
7490 DECL_STATIC_FUNCTION_P (decl
) = 1;
7491 DECL_CONTEXT (decl
) = ctype
;
7496 DECL_CONTEXT (decl
) = ctype
;
7498 check_class_member_definition_namespace (decl
);
7501 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7503 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7504 error ("cannot declare %<::main%> to be a template");
7506 error ("cannot declare %<::main%> to be inline");
7508 error ("cannot declare %<::main%> to be constexpr");
7510 error ("cannot declare %<::main%> to be static");
7515 /* Members of anonymous types and local classes have no linkage; make
7516 them internal. If a typedef is made later, this will be changed. */
7517 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7518 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7521 if (publicp
&& cxx_dialect
== cxx98
)
7523 /* [basic.link]: A name with no linkage (notably, the name of a class
7524 or enumeration declared in a local scope) shall not be used to
7525 declare an entity with linkage.
7527 DR 757 relaxes this restriction for C++0x. */
7528 t
= no_linkage_check (TREE_TYPE (decl
),
7529 /*relaxed_p=*/false);
7532 if (TYPE_ANONYMOUS_P (t
))
7534 if (DECL_EXTERN_C_P (decl
))
7535 /* Allow this; it's pretty common in C. */;
7538 permerror (input_location
, "anonymous type with no linkage "
7539 "used to declare function %q#D with linkage",
7541 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7542 permerror (input_location
, "%q+#D does not refer to the unqualified "
7543 "type, so it is not used for linkage",
7548 permerror (input_location
, "type %qT with no linkage used to "
7549 "declare function %q#D with linkage", t
, decl
);
7553 TREE_PUBLIC (decl
) = publicp
;
7556 DECL_INTERFACE_KNOWN (decl
) = 1;
7557 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7560 /* If the declaration was declared inline, mark it as such. */
7562 DECL_DECLARED_INLINE_P (decl
) = 1;
7564 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7566 DECL_EXTERNAL (decl
) = 1;
7567 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7572 ? G_("static member function %qD cannot have cv-qualifier")
7573 : G_("non-member function %qD cannot have cv-qualifier"),
7575 quals
= TYPE_UNQUALIFIED
;
7581 ? G_("static member function %qD cannot have ref-qualifier")
7582 : G_("non-member function %qD cannot have ref-qualifier"),
7584 rqual
= REF_QUAL_NONE
;
7588 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7589 && !grok_op_properties (decl
, /*complain=*/true))
7591 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7593 bool long_long_unsigned_p
;
7595 const char *suffix
= NULL
;
7596 /* [over.literal]/6: Literal operators shall not have C linkage. */
7597 if (DECL_LANGUAGE (decl
) == lang_c
)
7599 error ("literal operator with C linkage");
7603 if (DECL_NAMESPACE_SCOPE_P (decl
))
7605 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7608 error ("%qD has invalid argument list", decl
);
7612 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7613 if (long_long_unsigned_p
)
7615 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7616 warning (0, "integer suffix %<%s%>"
7617 " shadowed by implementation", suffix
);
7619 else if (long_double_p
)
7621 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7622 warning (0, "floating point suffix %<%s%>"
7623 " shadowed by implementation", suffix
);
7628 error ("%qD must be a non-member function", decl
);
7634 /* Make the init_value nonzero so pushdecl knows this is not
7635 tentative. error_mark_node is replaced later with the BLOCK. */
7636 DECL_INITIAL (decl
) = error_mark_node
;
7638 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7639 TREE_NOTHROW (decl
) = 1;
7641 /* Caller will do the rest of this. */
7645 if (ctype
!= NULL_TREE
)
7646 grokclassfn (ctype
, decl
, flags
);
7649 if (cxx_dialect
>= cxx0x
7650 && DECL_DESTRUCTOR_P (decl
)
7651 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7652 && !processing_template_decl
)
7653 deduce_noexcept_on_destructor (decl
);
7655 decl
= check_explicit_specialization (orig_declarator
, decl
,
7658 4 * (friendp
!= 0));
7659 if (decl
== error_mark_node
)
7662 if (DECL_STATIC_FUNCTION_P (decl
))
7663 check_static_quals (decl
, quals
);
7667 cplus_decl_attributes (&decl
, *attrlist
, 0);
7668 *attrlist
= NULL_TREE
;
7671 /* Check main's type after attributes have been applied. */
7672 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7674 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7677 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7679 error ("%<::main%> must return %<int%>");
7680 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7681 TREE_TYPE (decl
) = newtype
;
7684 check_main_parameter_types (decl
);
7687 if (ctype
!= NULL_TREE
7688 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7691 tree old_decl
= check_classfn (ctype
, decl
,
7692 (processing_template_decl
7693 > template_class_depth (ctype
))
7694 ? current_template_parms
7697 if (old_decl
== error_mark_node
)
7705 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7706 /* Because grokfndecl is always supposed to return a
7707 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7708 here. We depend on our callers to figure out that its
7709 really a template that's being returned. */
7710 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7712 if (DECL_STATIC_FUNCTION_P (old_decl
)
7713 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7715 /* Remove the `this' parm added by grokclassfn. */
7716 revert_static_member_fn (decl
);
7717 check_static_quals (decl
, quals
);
7719 if (DECL_ARTIFICIAL (old_decl
))
7721 error ("definition of implicitly-declared %qD", old_decl
);
7724 else if (DECL_DEFAULTED_FN (old_decl
))
7726 error ("definition of explicitly-defaulted %q+D", decl
);
7727 error ("%q+#D explicitly defaulted here", old_decl
);
7731 /* Since we've smashed OLD_DECL to its
7732 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7733 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7734 decl
= DECL_TEMPLATE_RESULT (decl
);
7736 /* Attempt to merge the declarations. This can fail, in
7737 the case of some invalid specialization declarations. */
7738 pushed_scope
= push_scope (ctype
);
7739 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7741 pop_scope (pushed_scope
);
7744 error ("no %q#D member function declared in class %qT",
7752 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7755 if (ctype
== NULL_TREE
|| check
)
7759 DECL_VIRTUAL_P (decl
) = 1;
7764 /* decl is a FUNCTION_DECL.
7765 specifiers are the parsed virt-specifiers.
7767 Set flags to reflect the virt-specifiers.
7772 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7774 if (decl
== NULL_TREE
)
7776 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7777 DECL_OVERRIDE_P (decl
) = 1;
7778 if (specifiers
& VIRT_SPEC_FINAL
)
7779 DECL_FINAL_P (decl
) = 1;
7783 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7784 the linkage that DECL will receive in the object file. */
7787 set_linkage_for_static_data_member (tree decl
)
7789 /* A static data member always has static storage duration and
7790 external linkage. Note that static data members are forbidden in
7791 local classes -- the only situation in which a class has
7792 non-external linkage. */
7793 TREE_PUBLIC (decl
) = 1;
7794 TREE_STATIC (decl
) = 1;
7795 /* For non-template classes, static data members are always put
7796 out in exactly those files where they are defined, just as
7797 with ordinary namespace-scope variables. */
7798 if (!processing_template_decl
)
7799 DECL_INTERFACE_KNOWN (decl
) = 1;
7802 /* Create a VAR_DECL named NAME with the indicated TYPE.
7804 If SCOPE is non-NULL, it is the class type or namespace containing
7805 the variable. If SCOPE is NULL, the variable should is created in
7806 the innermost enclosings scope. */
7809 grokvardecl (tree type
,
7811 const cp_decl_specifier_seq
*declspecs
,
7817 tree explicit_scope
;
7819 gcc_assert (!name
|| identifier_p (name
));
7821 /* Compute the scope in which to place the variable, but remember
7822 whether or not that scope was explicitly specified by the user. */
7823 explicit_scope
= scope
;
7826 /* An explicit "extern" specifier indicates a namespace-scope
7828 if (declspecs
->storage_class
== sc_extern
)
7829 scope
= current_decl_namespace ();
7830 else if (!at_function_scope_p ())
7831 scope
= current_scope ();
7835 && (/* If the variable is a namespace-scope variable declared in a
7836 template, we need DECL_LANG_SPECIFIC. */
7837 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7838 /* Similarly for namespace-scope variables with language linkage
7840 || (TREE_CODE (scope
) == NAMESPACE_DECL
7841 && current_lang_name
!= lang_name_cplusplus
)
7842 /* Similarly for static data members. */
7844 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7846 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7848 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7849 set_decl_namespace (decl
, explicit_scope
, 0);
7851 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7853 if (declspecs
->storage_class
== sc_extern
)
7855 DECL_THIS_EXTERN (decl
) = 1;
7856 DECL_EXTERNAL (decl
) = !initialized
;
7859 if (DECL_CLASS_SCOPE_P (decl
))
7861 set_linkage_for_static_data_member (decl
);
7862 /* This function is only called with out-of-class definitions. */
7863 DECL_EXTERNAL (decl
) = 0;
7864 check_class_member_definition_namespace (decl
);
7866 /* At top level, either `static' or no s.c. makes a definition
7867 (perhaps tentative), and absence of `static' makes it public. */
7868 else if (toplevel_bindings_p ())
7870 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7871 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7872 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7874 /* Not at top level, only `static' makes a static definition. */
7877 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7878 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7881 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7883 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7884 if (declspecs
->gnu_thread_keyword_p
)
7885 DECL_GNU_TLS_P (decl
) = true;
7888 /* If the type of the decl has no linkage, make sure that we'll
7889 notice that in mark_used. */
7890 if (cxx_dialect
> cxx98
7891 && decl_linkage (decl
) != lk_none
7892 && DECL_LANG_SPECIFIC (decl
) == NULL
7893 && !DECL_EXTERN_C_P (decl
)
7894 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7895 retrofit_lang_decl (decl
);
7897 if (TREE_PUBLIC (decl
))
7899 /* [basic.link]: A name with no linkage (notably, the name of a class
7900 or enumeration declared in a local scope) shall not be used to
7901 declare an entity with linkage.
7903 DR 757 relaxes this restriction for C++0x. */
7904 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7905 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7908 if (TYPE_ANONYMOUS_P (t
))
7910 if (DECL_EXTERN_C_P (decl
))
7911 /* Allow this; it's pretty common in C. */
7915 /* DRs 132, 319 and 389 seem to indicate types with
7916 no linkage can only be used to declare extern "C"
7917 entities. Since it's not always an error in the
7918 ISO C++ 90 Standard, we only issue a warning. */
7919 warning (0, "anonymous type with no linkage used to declare "
7920 "variable %q#D with linkage", decl
);
7921 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7922 warning (0, "%q+#D does not refer to the unqualified "
7923 "type, so it is not used for linkage",
7928 warning (0, "type %qT with no linkage used to declare variable "
7929 "%q#D with linkage", t
, decl
);
7933 DECL_INTERFACE_KNOWN (decl
) = 1;
7938 /* Create and return a canonical pointer to member function type, for
7939 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7942 build_ptrmemfunc_type (tree type
)
7946 tree unqualified_variant
= NULL_TREE
;
7948 if (type
== error_mark_node
)
7951 /* If a canonical type already exists for this type, use it. We use
7952 this method instead of type_hash_canon, because it only does a
7953 simple equality check on the list of field members. */
7955 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7958 /* Make sure that we always have the unqualified pointer-to-member
7960 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7962 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7964 t
= make_class_type (RECORD_TYPE
);
7965 xref_basetypes (t
, NULL_TREE
);
7967 /* Let the front end know this is a pointer to member function... */
7968 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7969 /* ... and not really a class type. */
7970 SET_CLASS_TYPE_P (t
, 0);
7972 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7975 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7977 DECL_CHAIN (field
) = fields
;
7980 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7982 /* Zap out the name so that the back end will give us the debugging
7983 information for this anonymous RECORD_TYPE. */
7984 TYPE_NAME (t
) = NULL_TREE
;
7986 /* If this is not the unqualified form of this pointer-to-member
7987 type, set the TYPE_MAIN_VARIANT for this type to be the
7988 unqualified type. Since they are actually RECORD_TYPEs that are
7989 not variants of each other, we must do this manually.
7990 As we just built a new type there is no need to do yet another copy. */
7991 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7993 int type_quals
= cp_type_quals (type
);
7994 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7995 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7996 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7997 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7998 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7999 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8000 TREE_TYPE (TYPE_BINFO (t
)) = t
;
8003 /* Cache this pointer-to-member type so that we can find it again
8005 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8007 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8008 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8009 else if (TYPE_CANONICAL (type
) != type
)
8010 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8015 /* Create and return a pointer to data member type. */
8018 build_ptrmem_type (tree class_type
, tree member_type
)
8020 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8022 cp_cv_quals quals
= type_memfn_quals (member_type
);
8023 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8024 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8025 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8029 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8030 return build_offset_type (class_type
, member_type
);
8034 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8035 Check to see that the definition is valid. Issue appropriate error
8036 messages. Return 1 if the definition is particularly bad, or 0
8040 check_static_variable_definition (tree decl
, tree type
)
8042 /* Can't check yet if we don't know the type. */
8043 if (dependent_type_p (type
))
8045 /* If DECL is declared constexpr, we'll do the appropriate checks
8046 in check_initializer. */
8047 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8049 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8051 if (!COMPLETE_TYPE_P (type
))
8052 error ("in-class initialization of static data member %q#D of "
8053 "incomplete type", decl
);
8054 else if (literal_type_p (type
))
8055 permerror (input_location
,
8056 "%<constexpr%> needed for in-class initialization of "
8057 "static data member %q#D of non-integral type", decl
);
8059 error ("in-class initialization of static data member %q#D of "
8060 "non-literal type", decl
);
8064 /* Motion 10 at San Diego: If a static const integral data member is
8065 initialized with an integral constant expression, the initializer
8066 may appear either in the declaration (within the class), or in
8067 the definition, but not both. If it appears in the class, the
8068 member is a member constant. The file-scope definition is always
8070 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8072 error ("invalid in-class initialization of static data member "
8073 "of non-integral type %qT",
8077 else if (!CP_TYPE_CONST_P (type
))
8078 error ("ISO C++ forbids in-class initialization of non-const "
8079 "static member %qD",
8081 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8082 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8083 "%qD of non-integral type %qT", decl
, type
);
8088 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8089 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8090 expressions out into temporary variables so that walk_tree doesn't
8091 step into them (c++/15764). */
8094 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8096 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8097 tree expr
= *expr_p
;
8098 if (TREE_CODE (expr
) == SAVE_EXPR
)
8100 tree op
= TREE_OPERAND (expr
, 0);
8101 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8102 if (TREE_SIDE_EFFECTS (op
))
8103 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8106 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8111 /* Entry point for the above. */
8114 stabilize_vla_size (tree size
)
8116 struct pointer_set_t
*pset
= pointer_set_create ();
8117 /* Break out any function calls into temporary variables. */
8118 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8119 pointer_set_destroy (pset
);
8122 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8123 not inside of SAVE_EXPR and fold them. */
8126 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8128 tree expr
= *expr_p
;
8129 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8131 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8133 *(bool *)data
= true;
8134 if (SIZEOF_EXPR_TYPE_P (expr
))
8135 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8136 SIZEOF_EXPR
, false);
8137 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8138 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8141 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8143 if (expr
== error_mark_node
)
8144 expr
= size_one_node
;
8151 /* Given the SIZE (i.e., number of elements) in an array, compute an
8152 appropriate index type for the array. If non-NULL, NAME is the
8153 name of the thing being declared. */
8156 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8160 tree abi_1_itype
= NULL_TREE
;
8162 if (error_operand_p (size
))
8163 return error_mark_node
;
8165 if (!type_dependent_expression_p (size
))
8167 tree type
= TREE_TYPE (size
);
8169 mark_rvalue_use (size
);
8171 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
8172 && TREE_SIDE_EFFECTS (size
))
8173 /* In C++98, we mark a non-constant array bound with a magic
8174 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8177 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8179 if (CLASS_TYPE_P (type
)
8180 && CLASSTYPE_LITERAL_P (type
))
8182 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8185 if (!(complain
& tf_error
))
8186 return error_mark_node
;
8188 error ("size of array %qD has non-integral type %qT",
8191 error ("size of array has non-integral type %qT", type
);
8192 size
= integer_one_node
;
8194 if (size
== error_mark_node
)
8195 return error_mark_node
;
8196 type
= TREE_TYPE (size
);
8197 /* We didn't support this case in GCC 3.2, so don't bother
8198 trying to model it now in ABI v1. */
8199 abi_1_itype
= error_mark_node
;
8202 size
= maybe_constant_value (size
);
8203 if (!TREE_CONSTANT (size
))
8207 if (error_operand_p (size
))
8208 return error_mark_node
;
8210 /* The array bound must be an integer type. */
8211 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8213 if (!(complain
& tf_error
))
8214 return error_mark_node
;
8216 error ("size of array %qD has non-integral type %qT", name
, type
);
8218 error ("size of array has non-integral type %qT", type
);
8219 size
= integer_one_node
;
8220 type
= TREE_TYPE (size
);
8224 /* A type is dependent if it is...an array type constructed from any
8225 dependent type or whose size is specified by a constant expression
8226 that is value-dependent. */
8227 /* We can only call value_dependent_expression_p on integral constant
8228 expressions; treat non-constant expressions as dependent, too. */
8229 if (processing_template_decl
8230 && (type_dependent_expression_p (size
)
8231 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8233 /* We cannot do any checking for a SIZE that isn't known to be
8234 constant. Just build the index type and mark that it requires
8235 structural equality checks. */
8236 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8237 size
, integer_one_node
));
8238 TYPE_DEPENDENT_P (itype
) = 1;
8239 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8240 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8244 if (!abi_version_at_least (2) && processing_template_decl
8245 && abi_1_itype
== NULL_TREE
)
8246 /* For abi-1, we handled all instances in templates the same way,
8247 even when they were non-dependent. This affects the manglings
8248 produced. So, we do the normal checking for non-dependent
8249 sizes, but at the end we'll return the same type that abi-1
8250 would have, but with TYPE_CANONICAL set to the "right"
8251 value that the current ABI would provide. */
8252 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8253 osize
, integer_one_node
));
8255 /* Normally, the array-bound will be a constant. */
8256 if (TREE_CODE (size
) == INTEGER_CST
)
8258 /* Check to see if the array bound overflowed. Make that an
8259 error, no matter how generous we're being. */
8260 constant_expression_error (size
);
8262 /* An array must have a positive number of elements. */
8263 if (INT_CST_LT (size
, integer_zero_node
))
8265 if (!(complain
& tf_error
))
8266 return error_mark_node
;
8268 error ("size of array %qD is negative", name
);
8270 error ("size of array is negative");
8271 size
= integer_one_node
;
8273 /* As an extension we allow zero-sized arrays. */
8274 else if (integer_zerop (size
))
8276 if (!(complain
& tf_error
))
8277 /* We must fail if performing argument deduction (as
8278 indicated by the state of complain), so that
8279 another substitution can be found. */
8280 return error_mark_node
;
8281 else if (in_system_header
)
8282 /* Allow them in system headers because glibc uses them. */;
8284 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8286 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8289 else if (TREE_CONSTANT (size
)
8290 /* We don't allow VLAs at non-function scopes, or during
8291 tentative template substitution. */
8292 || !at_function_scope_p () || !(complain
& tf_error
))
8294 if (!(complain
& tf_error
))
8295 return error_mark_node
;
8296 /* `(int) &fn' is not a valid array bound. */
8298 error ("size of array %qD is not an integral constant-expression",
8301 error ("size of array is not an integral constant-expression");
8302 size
= integer_one_node
;
8304 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8307 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8309 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8311 else if (warn_vla
> 0)
8315 "variable length array %qD is used", name
);
8318 "variable length array is used");
8321 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8322 /* A variable sized array. */
8323 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8326 HOST_WIDE_INT saved_processing_template_decl
;
8328 /* Compute the index of the largest element in the array. It is
8329 one less than the number of elements in the array. We save
8330 and restore PROCESSING_TEMPLATE_DECL so that computations in
8331 cp_build_binary_op will be appropriately folded. */
8332 saved_processing_template_decl
= processing_template_decl
;
8333 processing_template_decl
= 0;
8334 itype
= cp_build_binary_op (input_location
,
8336 cp_convert (ssizetype
, size
, complain
),
8337 cp_convert (ssizetype
, integer_one_node
,
8340 itype
= fold (itype
);
8341 processing_template_decl
= saved_processing_template_decl
;
8343 if (!TREE_CONSTANT (itype
))
8345 /* A variable sized array. */
8346 itype
= variable_size (itype
);
8347 if (TREE_CODE (itype
) != SAVE_EXPR
)
8349 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8350 they might survive till gimplification. */
8351 tree newitype
= itype
;
8353 cp_walk_tree_without_duplicates (&newitype
,
8354 fold_sizeof_expr_r
, &found
);
8356 itype
= variable_size (fold (newitype
));
8359 /* Make sure that there was no overflow when creating to a signed
8360 index type. (For example, on a 32-bit machine, an array with
8361 size 2^32 - 1 is too big.) */
8362 else if (TREE_CODE (itype
) == INTEGER_CST
8363 && TREE_OVERFLOW (itype
))
8365 if (!(complain
& tf_error
))
8366 return error_mark_node
;
8367 error ("overflow in array dimension");
8368 TREE_OVERFLOW (itype
) = 0;
8372 /* Create and return the appropriate index type. */
8373 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8375 tree t
= build_index_type (itype
);
8376 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8377 itype
= abi_1_itype
;
8380 itype
= build_index_type (itype
);
8382 /* If the index type were dependent, we would have returned early, so
8383 remember that it isn't. */
8384 TYPE_DEPENDENT_P (itype
) = 0;
8385 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8389 /* Returns the scope (if any) in which the entity declared by
8390 DECLARATOR will be located. If the entity was declared with an
8391 unqualified name, NULL_TREE is returned. */
8394 get_scope_of_declarator (const cp_declarator
*declarator
)
8396 while (declarator
&& declarator
->kind
!= cdk_id
)
8397 declarator
= declarator
->declarator
;
8399 /* If the declarator-id is a SCOPE_REF, the scope in which the
8400 declaration occurs is the first operand. */
8402 && declarator
->u
.id
.qualifying_scope
)
8403 return declarator
->u
.id
.qualifying_scope
;
8405 /* Otherwise, the declarator is not a qualified name; the entity will
8406 be declared in the current scope. */
8410 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8411 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8415 create_array_type_for_decl (tree name
, tree type
, tree size
)
8417 tree itype
= NULL_TREE
;
8419 /* If things have already gone awry, bail now. */
8420 if (type
== error_mark_node
|| size
== error_mark_node
)
8421 return error_mark_node
;
8423 /* 8.3.4/1: If the type of the identifier of D contains the auto
8424 type-specifier, the program is ill-formed. */
8425 if (pedantic
&& type_uses_auto (type
))
8426 pedwarn (input_location
, OPT_Wpedantic
,
8427 "declaration of %qD as array of %<auto%>", name
);
8429 /* If there are some types which cannot be array elements,
8430 issue an error-message and return. */
8431 switch (TREE_CODE (type
))
8435 error ("declaration of %qD as array of void", name
);
8437 error ("creating array of void");
8438 return error_mark_node
;
8442 error ("declaration of %qD as array of functions", name
);
8444 error ("creating array of functions");
8445 return error_mark_node
;
8447 case REFERENCE_TYPE
:
8449 error ("declaration of %qD as array of references", name
);
8451 error ("creating array of references");
8452 return error_mark_node
;
8456 error ("declaration of %qD as array of function members", name
);
8458 error ("creating array of function members");
8459 return error_mark_node
;
8467 The constant expressions that specify the bounds of the arrays
8468 can be omitted only for the first member of the sequence. */
8469 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8472 error ("declaration of %qD as multidimensional array must "
8473 "have bounds for all dimensions except the first",
8476 error ("multidimensional array must have bounds for all "
8477 "dimensions except the first");
8479 return error_mark_node
;
8482 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
8483 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8485 /* Figure out the index type for the array. */
8487 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8490 T is called the array element type; this type shall not be [...] an
8491 abstract class type. */
8492 abstract_virtuals_error (name
, type
);
8494 return build_cplus_array_type (type
, itype
);
8497 /* Check that it's OK to declare a function with the indicated TYPE.
8498 SFK indicates the kind of special function (if any) that this
8499 function is. OPTYPE is the type given in a conversion operator
8500 declaration, or the class type for a constructor/destructor.
8501 Returns the actual return type of the function; that
8502 may be different than TYPE if an error occurs, or for certain
8503 special functions. */
8506 check_special_function_return_type (special_function_kind sfk
,
8512 case sfk_constructor
:
8514 error ("return type specification for constructor invalid");
8516 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8517 type
= build_pointer_type (optype
);
8519 type
= void_type_node
;
8522 case sfk_destructor
:
8524 error ("return type specification for destructor invalid");
8525 /* We can't use the proper return type here because we run into
8526 problems with ambiguous bases and covariant returns.
8527 Java classes are left unchanged because (void *) isn't a valid
8528 Java type, and we don't want to change the Java ABI. */
8529 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8530 type
= build_pointer_type (void_type_node
);
8532 type
= void_type_node
;
8535 case sfk_conversion
:
8537 error ("return type specified for %<operator %T%>", optype
);
8548 /* A variable or data member (whose unqualified name is IDENTIFIER)
8549 has been declared with the indicated TYPE. If the TYPE is not
8550 acceptable, issue an error message and return a type to use for
8551 error-recovery purposes. */
8554 check_var_type (tree identifier
, tree type
)
8556 if (VOID_TYPE_P (type
))
8559 error ("unnamed variable or field declared void");
8560 else if (identifier_p (identifier
))
8562 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8563 error ("variable or field %qE declared void", identifier
);
8566 error ("variable or field declared void");
8567 type
= error_mark_node
;
8573 /* Functions for adjusting the visibility of a tagged type and its nested
8574 types when it gets a name for linkage purposes from a typedef. */
8576 static void bt_reset_linkage (binding_entry
, void *);
8578 reset_type_linkage (tree type
)
8580 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8581 if (CLASS_TYPE_P (type
))
8582 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8585 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8587 reset_type_linkage (b
->type
);
8590 /* Given declspecs and a declarator (abstract or otherwise), determine
8591 the name and type of the object declared and construct a DECL node
8594 DECLSPECS points to the representation of declaration-specifier
8595 sequence that precedes declarator.
8597 DECL_CONTEXT says which syntactic context this declaration is in:
8598 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8599 FUNCDEF for a function definition. Like NORMAL but a few different
8600 error messages in each case. Return value may be zero meaning
8601 this definition is too screwy to try to parse.
8602 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8603 handle member functions (which have FIELD context).
8604 Return value may be zero meaning this definition is too screwy to
8606 PARM for a parameter declaration (either within a function prototype
8607 or before a function body). Make a PARM_DECL, or return void_type_node.
8608 TPARM for a template parameter declaration.
8609 CATCHPARM for a parameter declaration before a catch clause.
8610 TYPENAME if for a typename (in a cast or sizeof).
8611 Don't make a DECL node; just return the ..._TYPE node.
8612 FIELD for a struct or union field; make a FIELD_DECL.
8613 BITFIELD for a field with specified width.
8615 INITIALIZED is as for start_decl.
8617 ATTRLIST is a pointer to the list of attributes, which may be NULL
8618 if there are none; *ATTRLIST may be modified if attributes from inside
8619 the declarator should be applied to the declaration.
8621 When this function is called, scoping variables (such as
8622 CURRENT_CLASS_TYPE) should reflect the scope in which the
8623 declaration occurs, not the scope in which the new declaration will
8624 be placed. For example, on:
8628 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8631 Returns a DECL (if a declarator is present), a TYPE (if there is no
8632 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8636 grokdeclarator (const cp_declarator
*declarator
,
8637 cp_decl_specifier_seq
*declspecs
,
8638 enum decl_context decl_context
,
8642 tree type
= NULL_TREE
;
8644 int explicit_int128
= 0;
8645 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8646 int explicit_int
= 0;
8647 int explicit_char
= 0;
8648 int defaulted_int
= 0;
8650 tree typedef_decl
= NULL_TREE
;
8651 const char *name
= NULL
;
8652 tree typedef_type
= NULL_TREE
;
8653 /* True if this declarator is a function definition. */
8654 bool funcdef_flag
= false;
8655 cp_declarator_kind innermost_code
= cdk_error
;
8658 /* See the code below that used this. */
8659 tree decl_attr
= NULL_TREE
;
8662 /* Keep track of what sort of function is being processed
8663 so that we can warn about default return values, or explicit
8664 return values which do not match prescribed defaults. */
8665 special_function_kind sfk
= sfk_none
;
8667 tree dname
= NULL_TREE
;
8668 tree ctor_return_type
= NULL_TREE
;
8669 enum overload_flags flags
= NO_SPECIAL
;
8670 /* cv-qualifiers that apply to the declarator, for a declaration of
8671 a member function. */
8672 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8673 /* virt-specifiers that apply to the declarator, for a declaration of
8674 a member function. */
8675 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8676 /* ref-qualifier that applies to the declarator, for a declaration of
8677 a member function. */
8678 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8679 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8681 tree raises
= NULL_TREE
;
8682 int template_count
= 0;
8683 tree returned_attrs
= NULL_TREE
;
8684 tree parms
= NULL_TREE
;
8685 const cp_declarator
*id_declarator
;
8686 /* The unqualified name of the declarator; either an
8687 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8688 tree unqualified_id
;
8689 /* The class type, if any, in which this entity is located,
8690 or NULL_TREE if none. Note that this value may be different from
8691 the current class type; for example if an attempt is made to declare
8692 "A::f" inside "B", this value will be "A". */
8693 tree ctype
= current_class_type
;
8694 /* The NAMESPACE_DECL for the namespace in which this entity is
8695 located. If an unqualified name is used to declare the entity,
8696 this value will be NULL_TREE, even if the entity is located at
8698 tree in_namespace
= NULL_TREE
;
8699 cp_storage_class storage_class
;
8700 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8701 bool type_was_error_mark_node
= false;
8702 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8703 bool template_type_arg
= false;
8704 bool template_parm_flag
= false;
8705 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8706 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8707 source_location saved_loc
= input_location
;
8710 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8711 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8712 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8713 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8714 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8715 explicit_int128
= declspecs
->explicit_int128_p
;
8716 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8718 if (decl_context
== FUNCDEF
)
8719 funcdef_flag
= true, decl_context
= NORMAL
;
8720 else if (decl_context
== MEMFUNCDEF
)
8721 funcdef_flag
= true, decl_context
= FIELD
;
8722 else if (decl_context
== BITFIELD
)
8723 bitfield
= 1, decl_context
= FIELD
;
8724 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8725 template_type_arg
= true, decl_context
= TYPENAME
;
8726 else if (decl_context
== TPARM
)
8727 template_parm_flag
= true, decl_context
= PARM
;
8729 if (initialized
> 1)
8730 funcdef_flag
= true;
8732 /* Look inside a declarator for the name being declared
8733 and get it as a string, for an error message. */
8734 for (id_declarator
= declarator
;
8736 id_declarator
= id_declarator
->declarator
)
8738 if (id_declarator
->kind
!= cdk_id
)
8739 innermost_code
= id_declarator
->kind
;
8741 switch (id_declarator
->kind
)
8744 if (id_declarator
->declarator
8745 && id_declarator
->declarator
->kind
== cdk_id
)
8747 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8748 if (sfk
== sfk_destructor
)
8755 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8756 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8759 if (qualifying_scope
)
8761 if (at_function_scope_p ())
8765 A declarator-id shall not be qualified except
8768 None of the cases are permitted in block
8770 if (qualifying_scope
== global_namespace
)
8771 error ("invalid use of qualified-name %<::%D%>",
8773 else if (TYPE_P (qualifying_scope
))
8774 error ("invalid use of qualified-name %<%T::%D%>",
8775 qualifying_scope
, decl
);
8777 error ("invalid use of qualified-name %<%D::%D%>",
8778 qualifying_scope
, decl
);
8779 return error_mark_node
;
8781 else if (TYPE_P (qualifying_scope
))
8783 ctype
= qualifying_scope
;
8784 if (!MAYBE_CLASS_TYPE_P (ctype
))
8786 error ("%q#T is not a class or a namespace", ctype
);
8789 else if (innermost_code
!= cdk_function
8790 && current_class_type
8791 && !uniquely_derived_from_p (ctype
,
8792 current_class_type
))
8794 error ("type %qT is not derived from type %qT",
8795 ctype
, current_class_type
);
8796 return error_mark_node
;
8799 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8800 in_namespace
= qualifying_scope
;
8802 switch (TREE_CODE (decl
))
8808 if (innermost_code
!= cdk_function
)
8810 error ("declaration of %qD as non-function", decl
);
8811 return error_mark_node
;
8813 else if (!qualifying_scope
8814 && !(current_class_type
&& at_class_scope_p ()))
8816 error ("declaration of %qD as non-member", decl
);
8817 return error_mark_node
;
8820 type
= TREE_OPERAND (decl
, 0);
8822 type
= constructor_name (type
);
8823 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8828 case TEMPLATE_ID_EXPR
:
8830 tree fns
= TREE_OPERAND (decl
, 0);
8833 if (!identifier_p (dname
))
8835 gcc_assert (is_overloaded_fn (dname
));
8836 dname
= DECL_NAME (get_first_fn (dname
));
8841 case IDENTIFIER_NODE
:
8842 if (identifier_p (decl
))
8845 if (C_IS_RESERVED_WORD (dname
))
8847 error ("declarator-id missing; using reserved word %qD",
8849 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8851 else if (!IDENTIFIER_TYPENAME_P (dname
))
8852 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8855 gcc_assert (flags
== NO_SPECIAL
);
8856 flags
= TYPENAME_FLAG
;
8857 ctor_return_type
= TREE_TYPE (dname
);
8858 sfk
= sfk_conversion
;
8859 if (is_typename_at_global_scope (dname
))
8860 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8862 name
= "<invalid operator>";
8879 return error_mark_node
;
8884 if (id_declarator
->kind
== cdk_id
)
8890 The declarator in a function-definition shall have the form
8891 D1 ( parameter-declaration-clause) ... */
8892 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8894 error ("function definition does not declare parameters");
8895 return error_mark_node
;
8898 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8899 && innermost_code
!= cdk_function
8900 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8902 error ("declaration of %qD as non-function", dname
);
8903 return error_mark_node
;
8907 && identifier_p (dname
)
8908 && UDLIT_OPER_P (dname
)
8909 && innermost_code
!= cdk_function
)
8911 error ("declaration of %qD as non-function", dname
);
8912 return error_mark_node
;
8915 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8919 error ("declaration of %qD as %<typedef%>", dname
);
8920 return error_mark_node
;
8922 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8924 error ("declaration of %qD as parameter", dname
);
8925 return error_mark_node
;
8929 /* Anything declared one level down from the top level
8930 must be one of the parameters of a function
8931 (because the body is at least two levels down). */
8933 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8934 by not allowing C++ class definitions to specify their parameters
8935 with xdecls (must be spec.d in the parmlist).
8937 Since we now wait to push a class scope until we are sure that
8938 we are in a legitimate method context, we must set oldcname
8939 explicitly (since current_class_name is not yet alive).
8941 We also want to avoid calling this a PARM if it is in a namespace. */
8943 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8945 cp_binding_level
*b
= current_binding_level
;
8946 current_binding_level
= b
->level_chain
;
8947 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8948 decl_context
= PARM
;
8949 current_binding_level
= b
;
8953 name
= decl_context
== PARM
? "parameter" : "type name";
8955 if (constexpr_p
&& typedef_p
)
8957 error ("%<constexpr%> cannot appear in a typedef declaration");
8958 return error_mark_node
;
8961 /* If there were multiple types specified in the decl-specifier-seq,
8962 issue an error message. */
8963 if (declspecs
->multiple_types_p
)
8965 error ("two or more data types in declaration of %qs", name
);
8966 return error_mark_node
;
8969 if (declspecs
->conflicting_specifiers_p
)
8971 error ("conflicting specifiers in declaration of %qs", name
);
8972 return error_mark_node
;
8975 /* Extract the basic type from the decl-specifier-seq. */
8976 type
= declspecs
->type
;
8977 if (type
== error_mark_node
)
8980 type_was_error_mark_node
= true;
8982 /* If the entire declaration is itself tagged as deprecated then
8983 suppress reports of deprecated items. */
8984 if (type
&& TREE_DEPRECATED (type
)
8985 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8986 warn_deprecated_use (type
, NULL_TREE
);
8987 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8989 typedef_decl
= type
;
8990 type
= TREE_TYPE (typedef_decl
);
8991 if (TREE_DEPRECATED (type
)
8992 && DECL_ARTIFICIAL (typedef_decl
)
8993 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8994 warn_deprecated_use (type
, NULL_TREE
);
8996 /* No type at all: default to `int', and set DEFAULTED_INT
8997 because it was not a user-defined typedef. */
8998 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9000 /* These imply 'int'. */
9001 type
= integer_type_node
;
9005 explicit_int
= declspecs
->explicit_int_p
;
9006 explicit_char
= declspecs
->explicit_char_p
;
9009 /* See the code below that used this. */
9011 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9013 typedef_type
= type
;
9016 if (sfk
!= sfk_conversion
)
9017 ctor_return_type
= ctype
;
9019 if (sfk
!= sfk_none
)
9020 type
= check_special_function_return_type (sfk
, type
,
9022 else if (type
== NULL_TREE
)
9028 /* We handle `main' specially here, because 'main () { }' is so
9029 common. With no options, it is allowed. With -Wreturn-type,
9030 it is a warning. It is only an error with -pedantic-errors. */
9031 is_main
= (funcdef_flag
9032 && dname
&& identifier_p (dname
)
9033 && MAIN_NAME_P (dname
)
9034 && ctype
== NULL_TREE
9035 && in_namespace
== NULL_TREE
9036 && current_namespace
== global_namespace
);
9038 if (type_was_error_mark_node
)
9039 /* We've already issued an error, don't complain more. */;
9040 else if (in_system_header
|| flag_ms_extensions
)
9041 /* Allow it, sigh. */;
9043 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9045 pedwarn (input_location
, OPT_Wpedantic
,
9046 "ISO C++ forbids declaration of %qs with no type", name
);
9048 warning (OPT_Wreturn_type
,
9049 "ISO C++ forbids declaration of %qs with no type", name
);
9051 type
= integer_type_node
;
9056 if (explicit_int128
)
9058 if (int128_integer_type_node
== NULL_TREE
)
9060 error ("%<__int128%> is not supported by this target");
9061 explicit_int128
= false;
9063 else if (pedantic
&& ! in_system_header
)
9064 pedwarn (input_location
, OPT_Wpedantic
,
9065 "ISO C++ does not support %<__int128%> for %qs", name
);
9068 /* Now process the modifiers that were specified
9069 and check for invalid combinations. */
9071 /* Long double is a special combination. */
9072 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9075 type
= cp_build_qualified_type (long_double_type_node
,
9076 cp_type_quals (type
));
9079 /* Check all other uses of type modifiers. */
9081 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9085 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9086 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9087 else if (signed_p
&& unsigned_p
)
9088 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9089 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9090 error ("%<long long%> invalid for %qs", name
);
9091 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9092 error ("%<long%> invalid for %qs", name
);
9093 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9094 error ("%<short%> invalid for %qs", name
);
9095 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9096 error ("%<long%> or %<short%> invalid for %qs", name
);
9097 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9098 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9099 else if ((long_p
|| short_p
) && explicit_char
)
9100 error ("%<long%> or %<short%> specified with char for %qs", name
);
9101 else if (long_p
&& short_p
)
9102 error ("%<long%> and %<short%> specified together for %qs", name
);
9103 else if (type
== char16_type_node
|| type
== char32_type_node
)
9105 if (signed_p
|| unsigned_p
)
9106 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9107 else if (short_p
|| long_p
)
9108 error ("%<short%> or %<long%> invalid for %qs", name
);
9113 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9115 pedwarn (input_location
, OPT_Wpedantic
,
9116 "long, short, signed or unsigned used invalidly for %qs",
9118 if (flag_pedantic_errors
)
9123 /* Discard the type modifiers if they are invalid. */
9134 /* Decide whether an integer type is signed or not.
9135 Optionally treat bitfields as signed by default. */
9139 It is implementation-defined whether a plain (neither
9140 explicitly signed or unsigned) char, short, int, or long
9141 bit-field is signed or unsigned.
9143 Naturally, we extend this to long long as well. Note that
9144 this does not include wchar_t. */
9145 || (bitfield
&& !flag_signed_bitfields
9147 /* A typedef for plain `int' without `signed' can be
9148 controlled just like plain `int', but a typedef for
9149 `signed int' cannot be so controlled. */
9151 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9152 && TREE_CODE (type
) == INTEGER_TYPE
9153 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9155 if (explicit_int128
)
9156 type
= int128_unsigned_type_node
;
9158 type
= long_long_unsigned_type_node
;
9160 type
= long_unsigned_type_node
;
9162 type
= short_unsigned_type_node
;
9163 else if (type
== char_type_node
)
9164 type
= unsigned_char_type_node
;
9165 else if (typedef_decl
)
9166 type
= unsigned_type_for (type
);
9168 type
= unsigned_type_node
;
9170 else if (signed_p
&& type
== char_type_node
)
9171 type
= signed_char_type_node
;
9172 else if (explicit_int128
)
9173 type
= int128_integer_type_node
;
9175 type
= long_long_integer_type_node
;
9177 type
= long_integer_type_node
;
9179 type
= short_integer_type_node
;
9181 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9183 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9184 error ("complex invalid for %qs", name
);
9185 /* If we just have "complex", it is equivalent to
9186 "complex double", but if any modifiers at all are specified it is
9187 the complex form of TYPE. E.g, "complex short" is
9188 "complex short int". */
9189 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9190 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9191 type
= complex_double_type_node
;
9192 else if (type
== integer_type_node
)
9193 type
= complex_integer_type_node
;
9194 else if (type
== float_type_node
)
9195 type
= complex_float_type_node
;
9196 else if (type
== double_type_node
)
9197 type
= complex_double_type_node
;
9198 else if (type
== long_double_type_node
)
9199 type
= complex_long_double_type_node
;
9201 type
= build_complex_type (type
);
9204 type_quals
= TYPE_UNQUALIFIED
;
9205 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9206 type_quals
|= TYPE_QUAL_CONST
;
9207 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9208 type_quals
|= TYPE_QUAL_VOLATILE
;
9209 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9210 type_quals
|= TYPE_QUAL_RESTRICT
;
9211 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9212 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9215 /* If we're using the injected-class-name to form a compound type or a
9216 declaration, replace it with the underlying class so we don't get
9217 redundant typedefs in the debug output. But if we are returning the
9218 type unchanged, leave it alone so that it's available to
9219 maybe_get_template_decl_from_type_decl. */
9220 if (CLASS_TYPE_P (type
)
9221 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9222 && type
== TREE_TYPE (TYPE_NAME (type
))
9223 && (declarator
|| type_quals
))
9224 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9226 type_quals
|= cp_type_quals (type
);
9227 type
= cp_build_qualified_type_real
9228 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9229 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9230 /* We might have ignored or rejected some of the qualifiers. */
9231 type_quals
= cp_type_quals (type
);
9234 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9235 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9236 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9238 storage_class
= declspecs
->storage_class
;
9239 if (storage_class
== sc_static
)
9240 staticp
= 1 + (decl_context
== FIELD
);
9242 if (virtualp
&& staticp
== 2)
9244 error ("member %qD cannot be declared both virtual and static", dname
);
9245 storage_class
= sc_none
;
9248 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9250 /* Issue errors about use of storage classes for parameters. */
9251 if (decl_context
== PARM
)
9255 error ("typedef declaration invalid in parameter declaration");
9256 return error_mark_node
;
9258 else if (template_parm_flag
&& storage_class
!= sc_none
)
9260 error ("storage class specified for template parameter %qs", name
);
9261 return error_mark_node
;
9263 else if (storage_class
== sc_static
9264 || storage_class
== sc_extern
9266 error ("storage class specifiers invalid in parameter declarations");
9268 /* Function parameters cannot be constexpr. If we saw one, moan
9269 and pretend it wasn't there. */
9272 error ("a parameter cannot be declared %<constexpr%>");
9277 /* Give error if `virtual' is used outside of class declaration. */
9279 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9281 error ("%<virtual%> outside class declaration");
9285 /* Static anonymous unions are dealt with here. */
9286 if (staticp
&& decl_context
== TYPENAME
9288 && ANON_AGGR_TYPE_P (declspecs
->type
))
9289 decl_context
= FIELD
;
9291 /* Warn about storage classes that are invalid for certain
9292 kinds of declarations (parameters, typenames, etc.). */
9295 && storage_class
!= sc_extern
9296 && storage_class
!= sc_static
)
9299 error ("multiple storage classes in declaration of %qs", name
);
9302 if (decl_context
!= NORMAL
9303 && ((storage_class
!= sc_none
9304 && storage_class
!= sc_mutable
)
9307 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9308 && (storage_class
== sc_register
9309 || storage_class
== sc_auto
))
9313 else if (decl_context
== FIELD
9314 /* C++ allows static class elements. */
9315 && storage_class
== sc_static
)
9316 /* C++ also allows inlines and signed and unsigned elements,
9317 but in those cases we don't come in here. */
9321 if (decl_context
== FIELD
)
9322 error ("storage class specified for %qs", name
);
9325 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9326 error ("storage class specified for parameter %qs", name
);
9328 error ("storage class specified for typename");
9330 if (storage_class
== sc_register
9331 || storage_class
== sc_auto
9332 || storage_class
== sc_extern
9334 storage_class
= sc_none
;
9337 else if (storage_class
== sc_extern
&& funcdef_flag
9338 && ! toplevel_bindings_p ())
9339 error ("nested function %qs declared %<extern%>", name
);
9340 else if (toplevel_bindings_p ())
9342 if (storage_class
== sc_auto
)
9343 error ("top-level declaration of %qs specifies %<auto%>", name
);
9346 && storage_class
!= sc_extern
9347 && storage_class
!= sc_static
)
9349 if (declspecs
->gnu_thread_keyword_p
)
9350 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9351 "declared %<__thread%>", name
);
9353 /* When thread_local is applied to a variable of block scope the
9354 storage-class-specifier static is implied if it does not appear
9356 storage_class
= declspecs
->storage_class
= sc_static
;
9360 if (storage_class
&& friendp
)
9362 error ("storage class specifiers invalid in friend function declarations");
9363 storage_class
= sc_none
;
9368 unqualified_id
= NULL_TREE
;
9371 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9372 switch (TREE_CODE (unqualified_id
))
9375 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9376 if (TYPE_P (unqualified_id
))
9377 unqualified_id
= constructor_name (unqualified_id
);
9380 case IDENTIFIER_NODE
:
9381 case TEMPLATE_ID_EXPR
:
9389 if (declspecs
->std_attributes
)
9391 /* Apply the c++11 attributes to the type preceding them. */
9392 input_location
= declspecs
->locations
[ds_std_attribute
];
9393 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9394 input_location
= saved_loc
;
9397 /* Determine the type of the entity declared by recurring on the
9399 for (; declarator
; declarator
= declarator
->declarator
)
9401 const cp_declarator
*inner_declarator
;
9404 if (type
== error_mark_node
)
9405 return error_mark_node
;
9407 attrs
= declarator
->attributes
;
9413 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9414 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9415 if (declarator
->kind
== cdk_function
)
9416 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9417 if (declarator
->kind
== cdk_array
)
9418 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9419 returned_attrs
= decl_attributes (&type
,
9420 chainon (returned_attrs
, attrs
),
9424 if (declarator
->kind
== cdk_id
)
9427 inner_declarator
= declarator
->declarator
;
9429 switch (declarator
->kind
)
9432 type
= create_array_type_for_decl (dname
, type
,
9433 declarator
->u
.array
.bounds
);
9434 if (declarator
->std_attributes
)
9437 The optional attribute-specifier-seq appertains to the
9439 returned_attrs
= chainon (returned_attrs
,
9440 declarator
->std_attributes
);
9448 /* Declaring a function type.
9449 Make sure we have a valid type for the function to return. */
9451 if (type_quals
!= TYPE_UNQUALIFIED
)
9453 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9454 warning (OPT_Wignored_qualifiers
,
9455 "type qualifiers ignored on function return type");
9456 /* We now know that the TYPE_QUALS don't apply to the
9457 decl, but to its return type. */
9458 type_quals
= TYPE_UNQUALIFIED
;
9460 errmsg
= targetm
.invalid_return_type (type
);
9464 type
= integer_type_node
;
9467 /* Error about some types functions can't return. */
9469 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9471 error ("%qs declared as function returning a function", name
);
9472 return error_mark_node
;
9474 if (TREE_CODE (type
) == ARRAY_TYPE
)
9476 error ("%qs declared as function returning an array", name
);
9477 return error_mark_node
;
9480 input_location
= declspecs
->locations
[ds_type_spec
];
9481 abstract_virtuals_error (ACU_RETURN
, type
);
9482 input_location
= saved_loc
;
9484 /* Pick up type qualifiers which should be applied to `this'. */
9485 memfn_quals
= declarator
->u
.function
.qualifiers
;
9486 /* Pick up virt-specifiers. */
9487 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9488 /* And ref-qualifier, too */
9489 rqual
= declarator
->u
.function
.ref_qualifier
;
9490 /* Pick up the exception specifications. */
9491 raises
= declarator
->u
.function
.exception_specification
;
9492 /* If the exception-specification is ill-formed, let's pretend
9493 there wasn't one. */
9494 if (raises
== error_mark_node
)
9497 /* Say it's a definition only for the CALL_EXPR
9498 closest to the identifier. */
9499 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9501 /* Handle a late-specified return type. */
9504 if (type_uses_auto (type
))
9506 if (!declarator
->u
.function
.late_return_type
)
9508 if (current_class_type
9509 && LAMBDA_TYPE_P (current_class_type
))
9510 /* OK for C++11 lambdas. */;
9511 else if (cxx_dialect
< cxx1y
)
9512 pedwarn (input_location
, 0, "%qs function uses "
9513 "%<auto%> type specifier without trailing "
9514 "return type", name
);
9516 permerror (input_location
, "virtual function cannot "
9517 "have deduced return type");
9519 else if (!is_auto (type
))
9521 error ("%qs function with trailing return type has"
9522 " %qT as its type rather than plain %<auto%>",
9524 return error_mark_node
;
9527 else if (declarator
->u
.function
.late_return_type
)
9529 if (cxx_dialect
< cxx0x
)
9530 /* Not using maybe_warn_cpp0x because this should
9531 always be an error. */
9532 error ("trailing return type only available with "
9533 "-std=c++11 or -std=gnu++11");
9535 error ("%qs function with trailing return type not "
9536 "declared with %<auto%> type specifier", name
);
9537 return error_mark_node
;
9540 type
= splice_late_return_type
9541 (type
, declarator
->u
.function
.late_return_type
);
9542 if (type
== error_mark_node
)
9543 return error_mark_node
;
9545 if (ctype
== NULL_TREE
9546 && decl_context
== FIELD
9548 && (friendp
== 0 || dname
== current_class_name
))
9549 ctype
= current_class_type
;
9551 if (ctype
&& (sfk
== sfk_constructor
9552 || sfk
== sfk_destructor
))
9554 /* We are within a class's scope. If our declarator name
9555 is the same as the class name, and we are defining
9556 a function, then it is a constructor/destructor, and
9557 therefore returns a void type. */
9559 /* ISO C++ 12.4/2. A destructor may not be declared
9560 const or volatile. A destructor may not be static.
9561 A destructor may not be declared with ref-qualifier.
9563 ISO C++ 12.1. A constructor may not be declared
9564 const or volatile. A constructor may not be
9565 virtual. A constructor may not be static.
9566 A constructor may not be declared with ref-qualifier. */
9568 error ((flags
== DTOR_FLAG
)
9569 ? G_("destructor cannot be static member function")
9570 : G_("constructor cannot be static member function"));
9573 error ((flags
== DTOR_FLAG
)
9574 ? G_("destructors may not be cv-qualified")
9575 : G_("constructors may not be cv-qualified"));
9576 memfn_quals
= TYPE_UNQUALIFIED
;
9581 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9582 error ((flags
== DTOR_FLAG
)
9583 ? "destructors may not be ref-qualified"
9584 : "constructors may not be ref-qualified");
9585 rqual
= REF_QUAL_NONE
;
9588 if (decl_context
== FIELD
9589 && !member_function_or_else (ctype
,
9592 return error_mark_node
;
9594 if (flags
!= DTOR_FLAG
)
9596 /* It's a constructor. */
9601 permerror (input_location
, "constructors cannot be declared virtual");
9604 if (decl_context
== FIELD
9605 && sfk
!= sfk_constructor
)
9606 return error_mark_node
;
9608 if (decl_context
== FIELD
)
9614 error ("can%'t initialize friend function %qs", name
);
9617 /* Cannot be both friend and virtual. */
9618 error ("virtual functions cannot be friends");
9621 if (decl_context
== NORMAL
)
9622 error ("friend declaration not in class definition");
9623 if (current_function_decl
&& funcdef_flag
)
9624 error ("can%'t define friend function %qs in a local "
9628 else if (ctype
&& sfk
== sfk_conversion
)
9632 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9637 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9640 if (inner_declarator
9641 && inner_declarator
->kind
== cdk_id
9642 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9643 && arg_types
!= void_list_node
)
9645 error ("destructors may not have parameters");
9646 arg_types
= void_list_node
;
9650 type
= build_function_type (type
, arg_types
);
9651 if (declarator
->std_attributes
)
9654 The optional attribute-specifier-seq appertains to
9655 the function type. */
9656 decl_attributes (&type
, declarator
->std_attributes
,
9664 /* Filter out pointers-to-references and references-to-references.
9665 We can get these if a TYPE_DECL is used. */
9667 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9669 if (declarator
->kind
!= cdk_reference
)
9671 error ("cannot declare pointer to %q#T", type
);
9672 type
= TREE_TYPE (type
);
9675 /* In C++0x, we allow reference to reference declarations
9676 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9677 and template type arguments [14.3.1/4 temp.arg.type]. The
9678 check for direct reference to reference declarations, which
9679 are still forbidden, occurs below. Reasoning behind the change
9680 can be found in DR106, DR540, and the rvalue reference
9682 else if (cxx_dialect
== cxx98
)
9684 error ("cannot declare reference to %q#T", type
);
9685 type
= TREE_TYPE (type
);
9688 else if (VOID_TYPE_P (type
))
9690 if (declarator
->kind
== cdk_reference
)
9691 error ("cannot declare reference to %q#T", type
);
9692 else if (declarator
->kind
== cdk_ptrmem
)
9693 error ("cannot declare pointer to %q#T member", type
);
9696 /* We now know that the TYPE_QUALS don't apply to the decl,
9697 but to the target of the pointer. */
9698 type_quals
= TYPE_UNQUALIFIED
;
9700 /* This code used to handle METHOD_TYPE, but I don't think it's
9701 possible to get it here anymore. */
9702 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9703 if (declarator
->kind
== cdk_ptrmem
9704 && TREE_CODE (type
) == FUNCTION_TYPE
)
9706 memfn_quals
|= type_memfn_quals (type
);
9707 type
= build_memfn_type (type
,
9708 declarator
->u
.pointer
.class_type
,
9711 if (type
== error_mark_node
)
9712 return error_mark_node
;
9714 rqual
= REF_QUAL_NONE
;
9715 memfn_quals
= TYPE_UNQUALIFIED
;
9718 if (TREE_CODE (type
) == FUNCTION_TYPE
9719 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9720 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9721 error (declarator
->kind
== cdk_reference
9722 ? G_("cannot declare reference to qualified function type %qT")
9723 : G_("cannot declare pointer to qualified function type %qT"),
9726 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
9727 pedwarn (input_location
, OPT_Wvla
,
9728 declarator
->kind
== cdk_reference
9729 ? G_("reference to array of runtime bound")
9730 : G_("pointer to array of runtime bound"));
9732 /* When the pointed-to type involves components of variable size,
9733 care must be taken to ensure that the size evaluation code is
9734 emitted early enough to dominate all the possible later uses
9735 and late enough for the variables on which it depends to have
9738 This is expected to happen automatically when the pointed-to
9739 type has a name/declaration of it's own, but special attention
9740 is required if the type is anonymous.
9742 We handle the NORMAL and FIELD contexts here by inserting a
9743 dummy statement that just evaluates the size at a safe point
9744 and ensures it is not deferred until e.g. within a deeper
9745 conditional context (c++/43555).
9747 We expect nothing to be needed here for PARM or TYPENAME.
9748 Evaluating the size at this point for TYPENAME would
9749 actually be incorrect, as we might be in the middle of an
9750 expression with side effects on the pointed-to type size
9751 "arguments" prior to the pointer declaration point and the
9752 size evaluation could end up prior to the side effects. */
9754 if (!TYPE_NAME (type
)
9755 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9756 && at_function_scope_p ()
9757 && variably_modified_type_p (type
, NULL_TREE
))
9759 /* First break out any side-effects. */
9760 stabilize_vla_size (TYPE_SIZE (type
));
9761 /* And then force evaluation of the SAVE_EXPR. */
9762 finish_expr_stmt (TYPE_SIZE (type
));
9765 if (declarator
->kind
== cdk_reference
)
9767 /* In C++0x, the type we are creating a reference to might be
9768 a typedef which is itself a reference type. In that case,
9769 we follow the reference collapsing rules in
9770 [7.1.3/8 dcl.typedef] to create the final reference type:
9772 "If a typedef TD names a type that is a reference to a type
9773 T, an attempt to create the type 'lvalue reference to cv TD'
9774 creates the type 'lvalue reference to T,' while an attempt
9775 to create the type "rvalue reference to cv TD' creates the
9778 if (VOID_TYPE_P (type
))
9779 /* We already gave an error. */;
9780 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9782 if (declarator
->u
.reference
.rvalue_ref
)
9783 /* Leave type alone. */;
9785 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9788 type
= cp_build_reference_type
9789 (type
, declarator
->u
.reference
.rvalue_ref
);
9791 /* In C++0x, we need this check for direct reference to
9792 reference declarations, which are forbidden by
9793 [8.3.2/5 dcl.ref]. Reference to reference declarations
9794 are only allowed indirectly through typedefs and template
9795 type arguments. Example:
9797 void foo(int & &); // invalid ref-to-ref decl
9799 typedef int & int_ref;
9800 void foo(int_ref &); // valid ref-to-ref decl
9802 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9803 error ("cannot declare reference to %q#T, which is not "
9804 "a typedef or a template type argument", type
);
9806 else if (TREE_CODE (type
) == METHOD_TYPE
)
9807 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9808 else if (declarator
->kind
== cdk_ptrmem
)
9810 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9812 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9813 /* We will already have complained. */
9814 type
= error_mark_node
;
9816 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9820 type
= build_pointer_type (type
);
9822 /* Process a list of type modifier keywords (such as
9823 const or volatile) that were given inside the `*' or `&'. */
9825 if (declarator
->u
.pointer
.qualifiers
)
9828 = cp_build_qualified_type (type
,
9829 declarator
->u
.pointer
.qualifiers
);
9830 type_quals
= cp_type_quals (type
);
9833 /* Apply C++11 attributes to the pointer, and not to the
9834 type pointed to. This is unlike what is done for GNU
9835 attributes above. It is to comply with [dcl.ptr]/1:
9837 [the optional attribute-specifier-seq (7.6.1) appertains
9838 to the pointer and not to the object pointed to]. */
9839 if (declarator
->std_attributes
)
9840 decl_attributes (&type
, declarator
->std_attributes
,
9854 /* We need to stabilize side-effects in VLA sizes for regular array
9855 declarations too, not just pointers to arrays. */
9856 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9857 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9858 && at_function_scope_p ()
9859 && variably_modified_type_p (type
, NULL_TREE
))
9860 stabilize_vla_size (TYPE_SIZE (type
));
9862 /* A `constexpr' specifier used in an object declaration declares
9863 the object as `const'. */
9864 if (constexpr_p
&& innermost_code
!= cdk_function
)
9866 if (type_quals
& TYPE_QUAL_VOLATILE
)
9867 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9868 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9870 type_quals
|= TYPE_QUAL_CONST
;
9871 type
= cp_build_qualified_type (type
, type_quals
);
9875 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9876 && TREE_CODE (type
) != FUNCTION_TYPE
9877 && TREE_CODE (type
) != METHOD_TYPE
)
9879 error ("template-id %qD used as a declarator",
9881 unqualified_id
= dname
;
9884 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9885 qualified with a class-name, turn it into a METHOD_TYPE, unless
9886 we know that the function is static. We take advantage of this
9887 opportunity to do other processing that pertains to entities
9888 explicitly declared to be class members. Note that if DECLARATOR
9889 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9890 would not have exited the loop above. */
9892 && declarator
->u
.id
.qualifying_scope
9893 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9895 ctype
= declarator
->u
.id
.qualifying_scope
;
9896 ctype
= TYPE_MAIN_VARIANT (ctype
);
9897 template_count
= num_template_headers_for_class (ctype
);
9899 if (ctype
== current_class_type
)
9903 permerror (input_location
, "member functions are implicitly friends of their class");
9907 permerror (declarator
->id_loc
,
9908 "extra qualification %<%T::%> on member %qs",
9911 else if (/* If the qualifying type is already complete, then we
9912 can skip the following checks. */
9913 !COMPLETE_TYPE_P (ctype
)
9914 && (/* If the function is being defined, then
9915 qualifying type must certainly be complete. */
9917 /* A friend declaration of "T::f" is OK, even if
9918 "T" is a template parameter. But, if this
9919 function is not a friend, the qualifying type
9921 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9922 /* For a declaration, the type need not be
9923 complete, if either it is dependent (since there
9924 is no meaningful definition of complete in that
9925 case) or the qualifying class is currently being
9927 || !(dependent_type_p (ctype
)
9928 || currently_open_class (ctype
)))
9929 /* Check that the qualifying type is complete. */
9930 && !complete_type_or_else (ctype
, NULL_TREE
))
9931 return error_mark_node
;
9932 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9934 if (current_class_type
9935 && (!friendp
|| funcdef_flag
))
9938 ? G_("cannot define member function %<%T::%s%> "
9940 : G_("cannot declare member function %<%T::%s%> "
9942 ctype
, name
, current_class_type
);
9943 return error_mark_node
;
9946 else if (typedef_p
&& current_class_type
)
9948 error ("cannot declare member %<%T::%s%> within %qT",
9949 ctype
, name
, current_class_type
);
9950 return error_mark_node
;
9954 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9955 ctype
= current_class_type
;
9957 /* Now TYPE has the actual type. */
9962 *attrlist
= chainon (returned_attrs
, *attrlist
);
9964 attrlist
= &returned_attrs
;
9968 && declarator
->kind
== cdk_id
9969 && declarator
->std_attributes
)
9970 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
9971 a declarator-id appertains to the entity that is declared. */
9972 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
9974 /* Handle parameter packs. */
9975 if (parameter_pack_p
)
9977 if (decl_context
== PARM
)
9978 /* Turn the type into a pack expansion.*/
9979 type
= make_pack_expansion (type
);
9981 error ("non-parameter %qs cannot be a parameter pack", name
);
9984 /* Did array size calculations overflow or does the array cover more
9985 than half of the address-space? */
9986 if (TREE_CODE (type
) == ARRAY_TYPE
9987 && COMPLETE_TYPE_P (type
)
9988 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9989 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
9991 error ("size of array %qs is too large", name
);
9992 /* If we proceed with the array type as it is, we'll eventually
9993 crash in tree_low_cst(). */
9994 type
= error_mark_node
;
9997 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9998 && !processing_template_decl
9999 && variably_modified_type_p (type
, NULL_TREE
))
10001 if (decl_context
== FIELD
)
10002 error ("data member may not have variably modified type %qT", type
);
10004 error ("parameter may not have variably modified type %qT", type
);
10005 type
= error_mark_node
;
10008 if (explicitp
== 1 || (explicitp
&& friendp
))
10010 /* [dcl.fct.spec] The explicit specifier shall only be used in
10011 declarations of constructors within a class definition. */
10012 error ("only declarations of constructors can be %<explicit%>");
10016 if (storage_class
== sc_mutable
)
10018 if (decl_context
!= FIELD
|| friendp
)
10020 error ("non-member %qs cannot be declared %<mutable%>", name
);
10021 storage_class
= sc_none
;
10023 else if (decl_context
== TYPENAME
|| typedef_p
)
10025 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10026 storage_class
= sc_none
;
10028 else if (TREE_CODE (type
) == FUNCTION_TYPE
10029 || TREE_CODE (type
) == METHOD_TYPE
)
10031 error ("function %qs cannot be declared %<mutable%>", name
);
10032 storage_class
= sc_none
;
10036 error ("static %qs cannot be declared %<mutable%>", name
);
10037 storage_class
= sc_none
;
10039 else if (type_quals
& TYPE_QUAL_CONST
)
10041 error ("const %qs cannot be declared %<mutable%>", name
);
10042 storage_class
= sc_none
;
10044 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10046 permerror (input_location
, "reference %qs cannot be declared "
10047 "%<mutable%>", name
);
10048 storage_class
= sc_none
;
10052 /* If this is declaring a typedef name, return a TYPE_DECL. */
10053 if (typedef_p
&& decl_context
!= TYPENAME
)
10057 /* Note that the grammar rejects storage classes
10058 in typenames, fields or parameters. */
10059 if (current_lang_name
== lang_name_java
)
10060 TYPE_FOR_JAVA (type
) = 1;
10062 /* This declaration:
10064 typedef void f(int) const;
10066 declares a function type which is not a member of any
10067 particular class, but which is cv-qualified; for
10068 example "f S::*" declares a pointer to a const-qualified
10069 member function of S. We record the cv-qualification in the
10071 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10073 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10075 /* We have now dealt with these qualifiers. */
10076 memfn_quals
= TYPE_UNQUALIFIED
;
10077 rqual
= REF_QUAL_NONE
;
10080 if (type_uses_auto (type
))
10082 error ("typedef declared %<auto%>");
10083 type
= error_mark_node
;
10086 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
10087 pedwarn (input_location
, OPT_Wvla
,
10088 "typedef naming array of runtime bound");
10090 if (decl_context
== FIELD
)
10091 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10093 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10094 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10095 error_at (DECL_SOURCE_LOCATION (decl
),
10096 "typedef name may not be a nested-name-specifier");
10097 TREE_TYPE (decl
) = error_mark_node
;
10100 if (decl_context
!= FIELD
)
10102 if (!current_function_decl
)
10103 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10104 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10105 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10106 (current_function_decl
)))
10107 /* The TYPE_DECL is "abstract" because there will be
10108 clones of this constructor/destructor, and there will
10109 be copies of this TYPE_DECL generated in those
10111 DECL_ABSTRACT (decl
) = 1;
10113 else if (current_class_type
10114 && constructor_name_p (unqualified_id
, current_class_type
))
10115 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10116 "as enclosing class",
10119 /* If the user declares "typedef struct {...} foo" then the
10120 struct will have an anonymous name. Fill that name in now.
10121 Nothing can refer to it, so nothing needs know about the name
10123 if (type
!= error_mark_node
10125 && TYPE_NAME (type
)
10126 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10127 && TYPE_ANONYMOUS_P (type
)
10128 && declspecs
->type_definition_p
10129 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10133 /* Replace the anonymous name with the real name everywhere. */
10134 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10136 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10137 /* We do not rename the debug info representing the
10138 anonymous tagged type because the standard says in
10139 [dcl.typedef] that the naming applies only for
10140 linkage purposes. */
10141 /*debug_hooks->set_name (t, decl);*/
10142 TYPE_NAME (t
) = decl
;
10145 if (TYPE_LANG_SPECIFIC (type
))
10146 TYPE_WAS_ANONYMOUS (type
) = 1;
10148 /* If this is a typedef within a template class, the nested
10149 type is a (non-primary) template. The name for the
10150 template needs updating as well. */
10151 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10152 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10153 = TYPE_IDENTIFIER (type
);
10155 /* Adjust linkage now that we aren't anonymous anymore. */
10156 reset_type_linkage (type
);
10158 /* FIXME remangle member functions; member functions of a
10159 type with external linkage have external linkage. */
10163 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10164 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10166 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10167 memfn_quals
!= TYPE_UNQUALIFIED
,
10168 inlinep
, friendp
, raises
!= NULL_TREE
);
10170 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10171 /* Acknowledge that this was written:
10172 `using analias = atype;'. */
10173 TYPE_DECL_ALIAS_P (decl
) = 1;
10178 /* Detect the case of an array type of unspecified size
10179 which came, as such, direct from a typedef name.
10180 We must copy the type, so that the array's domain can be
10181 individually set by the object's initializer. */
10183 if (type
&& typedef_type
10184 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10185 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10186 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10188 /* Detect where we're using a typedef of function type to declare a
10189 function. PARMS will not be set, so we must create it now. */
10191 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10193 tree decls
= NULL_TREE
;
10196 for (args
= TYPE_ARG_TYPES (type
);
10197 args
&& args
!= void_list_node
;
10198 args
= TREE_CHAIN (args
))
10200 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10202 DECL_CHAIN (decl
) = decls
;
10206 parms
= nreverse (decls
);
10208 if (decl_context
!= TYPENAME
)
10210 /* A cv-qualifier-seq shall only be part of the function type
10211 for a non-static member function. A ref-qualifier shall only
10212 .... /same as above/ [dcl.fct] */
10213 if ((type_memfn_quals (type
) != TYPE_UNQUALIFIED
10214 || type_memfn_rqual (type
) != REF_QUAL_NONE
)
10215 && (current_class_type
== NULL_TREE
|| staticp
) )
10218 ? G_("qualified function types cannot be used to "
10219 "declare static member functions")
10220 : G_("qualified function types cannot be used to "
10221 "declare free functions"));
10222 type
= TYPE_MAIN_VARIANT (type
);
10225 /* The qualifiers on the function type become the qualifiers on
10226 the non-static member function. */
10227 memfn_quals
|= type_memfn_quals (type
);
10228 rqual
= type_memfn_rqual (type
);
10229 type_quals
= TYPE_UNQUALIFIED
;
10233 /* If this is a type name (such as, in a cast or sizeof),
10234 compute the type and return it now. */
10236 if (decl_context
== TYPENAME
)
10238 /* Note that the grammar rejects storage classes
10239 in typenames, fields or parameters. */
10240 if (type_quals
!= TYPE_UNQUALIFIED
)
10241 type_quals
= TYPE_UNQUALIFIED
;
10243 /* Special case: "friend class foo" looks like a TYPENAME context. */
10246 if (type_quals
!= TYPE_UNQUALIFIED
)
10248 error ("type qualifiers specified for friend class declaration");
10249 type_quals
= TYPE_UNQUALIFIED
;
10253 error ("%<inline%> specified for friend class declaration");
10259 /* Don't allow friend declaration without a class-key. */
10260 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10261 permerror (input_location
, "template parameters cannot be friends");
10262 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10263 permerror (input_location
, "friend declaration requires class-key, "
10264 "i.e. %<friend class %T::%D%>",
10265 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10267 permerror (input_location
, "friend declaration requires class-key, "
10268 "i.e. %<friend %#T%>",
10272 /* Only try to do this stuff if we didn't already give up. */
10273 if (type
!= integer_type_node
)
10275 /* A friendly class? */
10276 if (current_class_type
)
10277 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10278 /*complain=*/true);
10280 error ("trying to make class %qT a friend of global scope",
10283 type
= void_type_node
;
10286 else if (memfn_quals
)
10288 if (ctype
== NULL_TREE
10289 && TREE_CODE (type
) == METHOD_TYPE
)
10290 ctype
= TYPE_METHOD_BASETYPE (type
);
10293 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10294 /* Core issue #547: need to allow this in template type args. */
10295 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10296 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10298 error ("invalid qualifiers on non-member function type");
10303 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10304 && decl_context
!= CATCHPARM
10305 && TREE_CODE (type
) != UNION_TYPE
10308 error ("abstract declarator %qT used as declaration", type
);
10309 return error_mark_node
;
10312 /* Only functions may be declared using an operator-function-id. */
10314 && IDENTIFIER_OPNAME_P (unqualified_id
)
10315 && TREE_CODE (type
) != FUNCTION_TYPE
10316 && TREE_CODE (type
) != METHOD_TYPE
)
10318 error ("declaration of %qD as non-function", unqualified_id
);
10319 return error_mark_node
;
10322 /* We don't check parameter types here because we can emit a better
10323 error message later. */
10324 if (decl_context
!= PARM
)
10326 type
= check_var_type (unqualified_id
, type
);
10327 if (type
== error_mark_node
)
10328 return error_mark_node
;
10331 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10332 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10334 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10336 if (ctype
|| in_namespace
)
10337 error ("cannot use %<::%> in parameter declaration");
10339 if (type_uses_auto (type
))
10341 error ("parameter declared %<auto%>");
10342 type
= error_mark_node
;
10345 /* A parameter declared as an array of T is really a pointer to T.
10346 One declared as a function is really a pointer to a function.
10347 One declared as a member is really a pointer to member. */
10349 if (TREE_CODE (type
) == ARRAY_TYPE
)
10351 /* Transfer const-ness of array into that of type pointed to. */
10352 type
= build_pointer_type (TREE_TYPE (type
));
10353 type_quals
= TYPE_UNQUALIFIED
;
10355 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10356 type
= build_pointer_type (type
);
10359 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10360 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10362 cp_cv_quals real_quals
= memfn_quals
;
10363 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10364 real_quals
|= TYPE_QUAL_CONST
;
10365 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10371 if (decl_context
== PARM
)
10373 decl
= cp_build_parm_decl (unqualified_id
, type
);
10375 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10376 memfn_quals
!= TYPE_UNQUALIFIED
,
10377 inlinep
, friendp
, raises
!= NULL_TREE
);
10379 else if (decl_context
== FIELD
)
10381 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10382 && type_uses_auto (type
))
10384 error ("non-static data member declared %<auto%>");
10385 type
= error_mark_node
;
10388 /* The C99 flexible array extension. */
10389 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10390 && TYPE_DOMAIN (type
) == NULL_TREE
)
10392 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10393 tf_warning_or_error
);
10394 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10397 if (type
== error_mark_node
)
10399 /* Happens when declaring arrays of sizes which
10400 are error_mark_node, for example. */
10403 else if (in_namespace
&& !friendp
)
10405 /* Something like struct S { int N::j; }; */
10406 error ("invalid use of %<::%>");
10407 return error_mark_node
;
10409 else if (TREE_CODE (type
) == FUNCTION_TYPE
10410 || TREE_CODE (type
) == METHOD_TYPE
)
10413 tree function_context
;
10417 /* This should never happen in pure C++ (the check
10418 could be an assert). It could happen in
10419 Objective-C++ if someone writes invalid code that
10420 uses a function declaration for an instance
10421 variable or property (instance variables and
10422 properties are parsed as FIELD_DECLs, but they are
10423 part of an Objective-C class, not a C++ class).
10424 That code is invalid and is caught by this
10428 error ("declaration of function %qD in invalid context",
10430 return error_mark_node
;
10433 /* ``A union may [ ... ] not [ have ] virtual functions.''
10435 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10437 error ("function %qD declared virtual inside a union",
10439 return error_mark_node
;
10442 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10446 error ("%qD cannot be declared virtual, since it "
10447 "is always static",
10454 /* Check that the name used for a destructor makes sense. */
10455 if (sfk
== sfk_destructor
)
10457 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10461 gcc_assert (friendp
);
10462 error ("expected qualified name in friend declaration "
10463 "for destructor %qD", uqname
);
10464 return error_mark_node
;
10467 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10469 error ("declaration of %qD as member of %qT",
10471 return error_mark_node
;
10475 error ("a destructor cannot be %<constexpr%>");
10476 return error_mark_node
;
10479 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10481 error ("expected qualified name in friend declaration "
10482 "for constructor %qD",
10483 id_declarator
->u
.id
.unqualified_name
);
10484 return error_mark_node
;
10487 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10488 function_context
= (ctype
!= NULL_TREE
) ?
10489 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10490 publicp
= (! friendp
|| ! staticp
)
10491 && function_context
== NULL_TREE
;
10492 decl
= grokfndecl (ctype
, type
,
10493 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10494 ? unqualified_id
: dname
,
10497 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10498 friendp
? -1 : 0, friendp
, publicp
,
10499 inlinep
| (2 * constexpr_p
),
10501 funcdef_flag
, template_count
, in_namespace
,
10502 attrlist
, declarator
->id_loc
);
10503 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10504 if (decl
== NULL_TREE
)
10505 return error_mark_node
;
10507 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10508 /* The decl and setting of decl_attr is also turned off. */
10509 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10512 /* [class.conv.ctor]
10514 A constructor declared without the function-specifier
10515 explicit that can be called with a single parameter
10516 specifies a conversion from the type of its first
10517 parameter to the type of its class. Such a constructor
10518 is called a converting constructor. */
10519 if (explicitp
== 2)
10520 DECL_NONCONVERTING_P (decl
) = 1;
10522 else if (!staticp
&& !dependent_type_p (type
)
10523 && !COMPLETE_TYPE_P (complete_type (type
))
10524 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10526 if (unqualified_id
)
10527 error ("field %qD has incomplete type", unqualified_id
);
10529 error ("name %qT has incomplete type", type
);
10531 /* If we're instantiating a template, tell them which
10532 instantiation made the field's type be incomplete. */
10533 if (current_class_type
10534 && TYPE_NAME (current_class_type
)
10535 && IDENTIFIER_TEMPLATE (current_class_name
)
10537 && declspecs
->type
== type
)
10538 error (" in instantiation of template %qT",
10539 current_class_type
);
10541 return error_mark_node
;
10547 error ("%qE is neither function nor member function; "
10548 "cannot be declared friend", unqualified_id
);
10556 /* Friends are treated specially. */
10557 if (ctype
== current_class_type
)
10558 ; /* We already issued a permerror. */
10559 else if (decl
&& DECL_NAME (decl
))
10561 if (template_class_depth (current_class_type
) == 0)
10563 decl
= check_explicit_specialization
10564 (unqualified_id
, decl
, template_count
,
10565 2 * funcdef_flag
+ 4);
10566 if (decl
== error_mark_node
)
10567 return error_mark_node
;
10570 decl
= do_friend (ctype
, unqualified_id
, decl
,
10576 return error_mark_node
;
10579 /* Structure field. It may not be a function, except for C++. */
10581 if (decl
== NULL_TREE
)
10585 /* C++ allows static class members. All other work
10586 for this is done by grokfield. */
10587 decl
= build_lang_decl_loc (declarator
->id_loc
,
10588 VAR_DECL
, unqualified_id
, type
);
10589 set_linkage_for_static_data_member (decl
);
10590 /* Even if there is an in-class initialization, DECL
10591 is considered undefined until an out-of-class
10592 definition is provided. */
10593 DECL_EXTERNAL (decl
) = 1;
10597 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10598 if (declspecs
->gnu_thread_keyword_p
)
10599 DECL_GNU_TLS_P (decl
) = true;
10602 if (constexpr_p
&& !initialized
)
10604 error ("constexpr static data member %qD must have an "
10605 "initializer", decl
);
10606 constexpr_p
= false;
10613 error ("non-static data member %qE declared %<constexpr%>",
10615 constexpr_p
= false;
10617 decl
= build_decl (input_location
,
10618 FIELD_DECL
, unqualified_id
, type
);
10619 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10620 if (bitfield
&& !unqualified_id
)
10621 TREE_NO_WARNING (decl
) = 1;
10623 if (storage_class
== sc_mutable
)
10625 DECL_MUTABLE_P (decl
) = 1;
10626 storage_class
= sc_none
;
10631 /* An attempt is being made to initialize a non-static
10632 member. This is new in C++11. */
10633 maybe_warn_cpp0x (CPP0X_NSDMI
);
10635 /* If this has been parsed with static storage class, but
10636 errors forced staticp to be cleared, ensure NSDMI is
10638 if (declspecs
->storage_class
== sc_static
)
10639 DECL_INITIAL (decl
) = error_mark_node
;
10643 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10644 memfn_quals
!= TYPE_UNQUALIFIED
,
10645 inlinep
, friendp
, raises
!= NULL_TREE
);
10648 else if (TREE_CODE (type
) == FUNCTION_TYPE
10649 || TREE_CODE (type
) == METHOD_TYPE
)
10651 tree original_name
;
10654 if (!unqualified_id
)
10655 return error_mark_node
;
10657 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10658 original_name
= dname
;
10660 original_name
= unqualified_id
;
10662 if (storage_class
== sc_auto
)
10663 error ("storage class %<auto%> invalid for function %qs", name
);
10664 else if (storage_class
== sc_register
)
10665 error ("storage class %<register%> invalid for function %qs", name
);
10668 if (declspecs
->gnu_thread_keyword_p
)
10669 error ("storage class %<__thread%> invalid for function %qs",
10672 error ("storage class %<thread_local%> invalid for function %qs",
10676 if (virt_specifiers
)
10677 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10678 /* Function declaration not at top level.
10679 Storage classes other than `extern' are not allowed
10680 and `extern' makes no difference. */
10681 if (! toplevel_bindings_p ()
10682 && (storage_class
== sc_static
10683 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10686 if (storage_class
== sc_static
)
10687 pedwarn (input_location
, OPT_Wpedantic
,
10688 "%<static%> specified invalid for function %qs "
10689 "declared out of global scope", name
);
10691 pedwarn (input_location
, OPT_Wpedantic
,
10692 "%<inline%> specifier invalid for function %qs "
10693 "declared out of global scope", name
);
10696 if (ctype
== NULL_TREE
)
10700 error ("virtual non-class function %qs", name
);
10703 else if (sfk
== sfk_constructor
10704 || sfk
== sfk_destructor
)
10706 error (funcdef_flag
10707 ? G_("%qs defined in a non-class scope")
10708 : G_("%qs declared in a non-class scope"), name
);
10713 /* Record whether the function is public. */
10714 publicp
= (ctype
!= NULL_TREE
10715 || storage_class
!= sc_static
);
10717 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10718 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10720 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10722 template_count
, in_namespace
, attrlist
,
10723 declarator
->id_loc
);
10724 if (decl
== NULL_TREE
)
10725 return error_mark_node
;
10729 int invalid_static
= 0;
10731 /* Don't allow a static member function in a class, and forbid
10732 declaring main to be static. */
10733 if (TREE_CODE (type
) == METHOD_TYPE
)
10735 permerror (input_location
, "cannot declare member function %qD to have "
10736 "static linkage", decl
);
10737 invalid_static
= 1;
10739 else if (current_function_decl
)
10741 /* FIXME need arm citation */
10742 error ("cannot declare static function inside another function");
10743 invalid_static
= 1;
10746 if (invalid_static
)
10749 storage_class
= sc_none
;
10755 /* It's a variable. */
10757 /* An uninitialized decl with `extern' is a reference. */
10758 decl
= grokvardecl (type
, unqualified_id
,
10761 (type_quals
& TYPE_QUAL_CONST
) != 0,
10762 ctype
? ctype
: in_namespace
);
10763 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10764 memfn_quals
!= TYPE_UNQUALIFIED
,
10765 inlinep
, friendp
, raises
!= NULL_TREE
);
10769 DECL_CONTEXT (decl
) = ctype
;
10772 permerror (input_location
, "%<static%> may not be used when defining "
10773 "(as opposed to declaring) a static data member");
10775 storage_class
= sc_none
;
10777 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10779 error ("static member %qD declared %<register%>", decl
);
10780 storage_class
= sc_none
;
10782 if (storage_class
== sc_extern
&& pedantic
)
10784 pedwarn (input_location
, OPT_Wpedantic
,
10785 "cannot explicitly declare member %q#D to have "
10786 "extern linkage", decl
);
10787 storage_class
= sc_none
;
10790 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10792 error ("declaration of constexpr variable %qD is not a definition",
10794 constexpr_p
= false;
10798 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10800 if (toplevel_bindings_p ())
10802 /* It's common practice (and completely valid) to have a const
10803 be initialized and declared extern. */
10804 if (!(type_quals
& TYPE_QUAL_CONST
))
10805 warning (0, "%qs initialized and declared %<extern%>", name
);
10809 error ("%qs has both %<extern%> and initializer", name
);
10810 return error_mark_node
;
10814 /* Record `register' declaration for warnings on &
10815 and in case doing stupid register allocation. */
10817 if (storage_class
== sc_register
)
10818 DECL_REGISTER (decl
) = 1;
10819 else if (storage_class
== sc_extern
)
10820 DECL_THIS_EXTERN (decl
) = 1;
10821 else if (storage_class
== sc_static
)
10822 DECL_THIS_STATIC (decl
) = 1;
10824 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10825 if (constexpr_p
&& VAR_P (decl
))
10826 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10828 /* Record constancy and volatility on the DECL itself . There's
10829 no need to do this when processing a template; we'll do this
10830 for the instantiated declaration based on the type of DECL. */
10831 if (!processing_template_decl
)
10832 cp_apply_type_quals_to_decl (type_quals
, decl
);
10838 /* Subroutine of start_function. Ensure that each of the parameter
10839 types (as listed in PARMS) is complete, as is required for a
10840 function definition. */
10843 require_complete_types_for_parms (tree parms
)
10845 for (; parms
; parms
= DECL_CHAIN (parms
))
10847 if (dependent_type_p (TREE_TYPE (parms
)))
10849 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10850 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10852 relayout_decl (parms
);
10853 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10856 /* grokparms or complete_type_or_else will have already issued
10858 TREE_TYPE (parms
) = error_mark_node
;
10862 /* Returns nonzero if T is a local variable. */
10865 local_variable_p (const_tree t
)
10868 /* A VAR_DECL with a context that is a _TYPE is a static data
10870 && !TYPE_P (CP_DECL_CONTEXT (t
))
10871 /* Any other non-local variable must be at namespace scope. */
10872 && !DECL_NAMESPACE_SCOPE_P (t
))
10873 || (TREE_CODE (t
) == PARM_DECL
))
10879 /* Like local_variable_p, but suitable for use as a tree-walking
10883 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10886 if (local_variable_p (*tp
)
10887 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10889 else if (TYPE_P (*tp
))
10890 *walk_subtrees
= 0;
10895 /* Check that ARG, which is a default-argument expression for a
10896 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10897 something goes wrong. DECL may also be a _TYPE node, rather than a
10898 DECL, if there is no DECL available. */
10901 check_default_argument (tree decl
, tree arg
)
10906 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10907 /* We get a DEFAULT_ARG when looking at an in-class declaration
10908 with a default argument. Ignore the argument for now; we'll
10909 deal with it after the class is complete. */
10918 decl_type
= TREE_TYPE (decl
);
10920 if (arg
== error_mark_node
10921 || decl
== error_mark_node
10922 || TREE_TYPE (arg
) == error_mark_node
10923 || decl_type
== error_mark_node
)
10924 /* Something already went wrong. There's no need to check
10926 return error_mark_node
;
10928 /* [dcl.fct.default]
10930 A default argument expression is implicitly converted to the
10932 ++cp_unevaluated_operand
;
10933 perform_implicit_conversion_flags (decl_type
, arg
, tf_warning_or_error
,
10935 --cp_unevaluated_operand
;
10937 if (warn_zero_as_null_pointer_constant
10938 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10939 && null_ptr_cst_p (arg
)
10940 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
10941 return nullptr_node
;
10943 /* [dcl.fct.default]
10945 Local variables shall not be used in default argument
10948 The keyword `this' shall not be used in a default argument of a
10949 member function. */
10950 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10953 if (DECL_NAME (var
) == this_identifier
)
10954 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10956 error ("default argument %qE uses local variable %qD", arg
, var
);
10957 return error_mark_node
;
10964 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10967 type_is_deprecated (tree type
)
10969 enum tree_code code
;
10970 if (TREE_DEPRECATED (type
))
10972 if (TYPE_NAME (type
)
10973 && TREE_DEPRECATED (TYPE_NAME (type
)))
10976 /* Do warn about using typedefs to a deprecated class. */
10977 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10978 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10980 code
= TREE_CODE (type
);
10982 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10983 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10984 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10985 return type_is_deprecated (TREE_TYPE (type
));
10987 if (TYPE_PTRMEMFUNC_P (type
))
10988 return type_is_deprecated
10989 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10994 /* Decode the list of parameter types for a function type.
10995 Given the list of things declared inside the parens,
10996 return a list of types.
10998 If this parameter does not end with an ellipsis, we append
11001 *PARMS is set to the chain of PARM_DECLs created. */
11004 grokparms (tree parmlist
, tree
*parms
)
11006 tree result
= NULL_TREE
;
11007 tree decls
= NULL_TREE
;
11011 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11013 tree type
= NULL_TREE
;
11014 tree init
= TREE_PURPOSE (parm
);
11015 tree decl
= TREE_VALUE (parm
);
11016 const char *errmsg
;
11018 if (parm
== void_list_node
)
11021 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11024 type
= TREE_TYPE (decl
);
11025 if (VOID_TYPE_P (type
))
11027 if (same_type_p (type
, void_type_node
)
11028 && DECL_SELF_REFERENCE_P (type
)
11029 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11030 /* this is a parmlist of `(void)', which is ok. */
11032 cxx_incomplete_type_error (decl
, type
);
11033 /* It's not a good idea to actually create parameters of
11034 type `void'; other parts of the compiler assume that a
11035 void type terminates the parameter list. */
11036 type
= error_mark_node
;
11037 TREE_TYPE (decl
) = error_mark_node
;
11040 if (type
!= error_mark_node
11041 && TYPE_FOR_JAVA (type
)
11042 && MAYBE_CLASS_TYPE_P (type
))
11044 error ("parameter %qD has Java class type", decl
);
11045 type
= error_mark_node
;
11046 TREE_TYPE (decl
) = error_mark_node
;
11050 if (type
!= error_mark_node
11051 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11054 type
= error_mark_node
;
11055 TREE_TYPE (decl
) = error_mark_node
;
11058 if (type
!= error_mark_node
)
11060 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11062 tree deptype
= type_is_deprecated (type
);
11064 warn_deprecated_use (deptype
, NULL_TREE
);
11067 /* Top-level qualifiers on the parameters are
11068 ignored for function types. */
11069 type
= cp_build_qualified_type (type
, 0);
11070 if (TREE_CODE (type
) == METHOD_TYPE
)
11072 error ("parameter %qD invalidly declared method type", decl
);
11073 type
= build_pointer_type (type
);
11074 TREE_TYPE (decl
) = type
;
11076 else if (abstract_virtuals_error (decl
, type
))
11077 any_error
= 1; /* Seems like a good idea. */
11078 else if (POINTER_TYPE_P (type
))
11080 /* [dcl.fct]/6, parameter types cannot contain pointers
11081 (references) to arrays of unknown bound. */
11082 tree t
= TREE_TYPE (type
);
11083 int ptr
= TYPE_PTR_P (type
);
11087 if (TYPE_PTR_P (t
))
11089 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11091 else if (!TYPE_DOMAIN (t
))
11095 if (TREE_CODE (t
) == ARRAY_TYPE
)
11097 ? G_("parameter %qD includes pointer to array of "
11098 "unknown bound %qT")
11099 : G_("parameter %qD includes reference to array of "
11100 "unknown bound %qT"),
11106 else if (init
&& !processing_template_decl
)
11107 init
= check_default_argument (decl
, init
);
11110 DECL_CHAIN (decl
) = decls
;
11112 result
= tree_cons (init
, type
, result
);
11114 decls
= nreverse (decls
);
11115 result
= nreverse (result
);
11117 result
= chainon (result
, void_list_node
);
11124 /* D is a constructor or overloaded `operator='.
11126 Let T be the class in which D is declared. Then, this function
11129 -1 if D's is an ill-formed constructor or copy assignment operator
11130 whose first parameter is of type `T'.
11131 0 if D is not a copy constructor or copy assignment
11133 1 if D is a copy constructor or copy assignment operator whose
11134 first parameter is a reference to non-const qualified T.
11135 2 if D is a copy constructor or copy assignment operator whose
11136 first parameter is a reference to const qualified T.
11138 This function can be used as a predicate. Positive values indicate
11139 a copy constructor and nonzero values indicate a copy assignment
11143 copy_fn_p (const_tree d
)
11149 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11151 if (TREE_CODE (d
) == TEMPLATE_DECL
11152 || (DECL_TEMPLATE_INFO (d
)
11153 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11154 /* Instantiations of template member functions are never copy
11155 functions. Note that member functions of templated classes are
11156 represented as template functions internally, and we must
11157 accept those as copy functions. */
11160 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11164 arg_type
= TREE_VALUE (args
);
11165 if (arg_type
== error_mark_node
)
11168 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11170 /* Pass by value copy assignment operator. */
11173 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11174 && !TYPE_REF_IS_RVALUE (arg_type
)
11175 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11177 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11183 args
= TREE_CHAIN (args
);
11185 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11186 /* There are more non-optional args. */
11192 /* D is a constructor or overloaded `operator='.
11194 Let T be the class in which D is declared. Then, this function
11195 returns true when D is a move constructor or move assignment
11196 operator, false otherwise. */
11199 move_fn_p (const_tree d
)
11201 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11203 if (cxx_dialect
== cxx98
)
11204 /* There are no move constructors if we are in C++98 mode. */
11207 if (TREE_CODE (d
) == TEMPLATE_DECL
11208 || (DECL_TEMPLATE_INFO (d
)
11209 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11210 /* Instantiations of template member functions are never move
11211 functions. Note that member functions of templated classes are
11212 represented as template functions internally, and we must
11213 accept those as move functions. */
11216 return move_signature_fn_p (d
);
11219 /* D is a constructor or overloaded `operator='.
11221 Then, this function returns true when D has the same signature as a move
11222 constructor or move assignment operator (because either it is such a
11223 ctor/op= or it is a template specialization with the same signature),
11224 false otherwise. */
11227 move_signature_fn_p (const_tree d
)
11231 bool result
= false;
11233 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11237 arg_type
= TREE_VALUE (args
);
11238 if (arg_type
== error_mark_node
)
11241 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11242 && TYPE_REF_IS_RVALUE (arg_type
)
11243 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11247 args
= TREE_CHAIN (args
);
11249 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11250 /* There are more non-optional args. */
11256 /* Remember any special properties of member function DECL. */
11259 grok_special_member_properties (tree decl
)
11263 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11266 class_type
= DECL_CONTEXT (decl
);
11267 if (DECL_CONSTRUCTOR_P (decl
))
11269 int ctor
= copy_fn_p (decl
);
11271 if (!DECL_ARTIFICIAL (decl
))
11272 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11278 A non-template constructor for class X is a copy
11279 constructor if its first parameter is of type X&, const
11280 X&, volatile X& or const volatile X&, and either there
11281 are no other parameters or else all other parameters have
11282 default arguments. */
11283 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11284 if (user_provided_p (decl
))
11285 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11287 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11289 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11291 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11292 if (user_provided_p (decl
))
11293 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11295 else if (move_fn_p (decl
) && user_provided_p (decl
))
11296 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11297 else if (is_list_ctor (decl
))
11298 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11300 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11301 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11302 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11304 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11308 A non-template assignment operator for class X is a copy
11309 assignment operator if its parameter is of type X, X&, const
11310 X&, volatile X& or const volatile X&. */
11312 int assop
= copy_fn_p (decl
);
11316 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11317 if (user_provided_p (decl
))
11318 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11320 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11322 else if (move_fn_p (decl
) && user_provided_p (decl
))
11323 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11325 /* Destructors are handled in check_methods. */
11328 /* Check a constructor DECL has the correct form. Complains
11329 if the class has a constructor of the form X(X). */
11332 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11334 int ctor_parm
= copy_fn_p (decl
);
11340 A declaration of a constructor for a class X is ill-formed if
11341 its first parameter is of type (optionally cv-qualified) X
11342 and either there are no other parameters or else all other
11343 parameters have default arguments.
11345 We *don't* complain about member template instantiations that
11346 have this form, though; they can occur as we try to decide
11347 what constructor to use during overload resolution. Since
11348 overload resolution will never prefer such a constructor to
11349 the non-template copy constructor (which is either explicitly
11350 or implicitly defined), there's no need to worry about their
11351 existence. Theoretically, they should never even be
11352 instantiated, but that's hard to forestall. */
11353 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11361 /* An operator with this code is unary, but can also be binary. */
11364 ambi_op_p (enum tree_code code
)
11366 return (code
== INDIRECT_REF
11367 || code
== ADDR_EXPR
11368 || code
== UNARY_PLUS_EXPR
11369 || code
== NEGATE_EXPR
11370 || code
== PREINCREMENT_EXPR
11371 || code
== PREDECREMENT_EXPR
);
11374 /* An operator with this name can only be unary. */
11377 unary_op_p (enum tree_code code
)
11379 return (code
== TRUTH_NOT_EXPR
11380 || code
== BIT_NOT_EXPR
11381 || code
== COMPONENT_REF
11382 || code
== TYPE_EXPR
);
11385 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11386 errors are issued for invalid declarations. */
11389 grok_op_properties (tree decl
, bool complain
)
11391 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11393 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11394 tree name
= DECL_NAME (decl
);
11395 enum tree_code operator_code
;
11400 /* Count the number of arguments and check for ellipsis. */
11401 for (argtype
= argtypes
, arity
= 0;
11402 argtype
&& argtype
!= void_list_node
;
11403 argtype
= TREE_CHAIN (argtype
))
11405 ellipsis_p
= !argtype
;
11407 class_type
= DECL_CONTEXT (decl
);
11408 if (class_type
&& !CLASS_TYPE_P (class_type
))
11409 class_type
= NULL_TREE
;
11411 if (DECL_CONV_FN_P (decl
))
11412 operator_code
= TYPE_EXPR
;
11416 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11417 if (ansi_opname (CODE) == name) \
11419 operator_code = (CODE); \
11422 else if (ansi_assopname (CODE) == name) \
11424 operator_code = (CODE); \
11425 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11429 #include "operators.def"
11430 #undef DEF_OPERATOR
11432 gcc_unreachable ();
11435 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11436 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11439 switch (operator_code
)
11442 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11446 TYPE_GETS_DELETE (class_type
) |= 1;
11450 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11453 case VEC_DELETE_EXPR
:
11454 TYPE_GETS_DELETE (class_type
) |= 2;
11461 /* [basic.std.dynamic.allocation]/1:
11463 A program is ill-formed if an allocation function is declared
11464 in a namespace scope other than global scope or declared static
11467 The same also holds true for deallocation functions. */
11468 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11469 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11471 if (DECL_NAMESPACE_SCOPE_P (decl
))
11473 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11475 error ("%qD may not be declared within a namespace", decl
);
11478 else if (!TREE_PUBLIC (decl
))
11480 error ("%qD may not be declared as static", decl
);
11486 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11488 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11489 DECL_IS_OPERATOR_NEW (decl
) = 1;
11491 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11492 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11495 /* An operator function must either be a non-static member function
11496 or have at least one parameter of a class, a reference to a class,
11497 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11498 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11500 if (operator_code
== TYPE_EXPR
11501 || operator_code
== CALL_EXPR
11502 || operator_code
== COMPONENT_REF
11503 || operator_code
== ARRAY_REF
11504 || operator_code
== NOP_EXPR
)
11506 error ("%qD must be a nonstatic member function", decl
);
11513 if (DECL_STATIC_FUNCTION_P (decl
))
11515 error ("%qD must be either a non-static member "
11516 "function or a non-member function", decl
);
11520 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11522 tree arg
= non_reference (TREE_VALUE (p
));
11523 if (arg
== error_mark_node
)
11526 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11527 because these checks are performed even on
11528 template functions. */
11529 if (MAYBE_CLASS_TYPE_P (arg
)
11530 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11534 if (!p
|| p
== void_list_node
)
11537 error ("%qD must have an argument of class or "
11538 "enumerated type", decl
);
11544 /* There are no restrictions on the arguments to an overloaded
11546 if (operator_code
== CALL_EXPR
)
11549 /* Warn about conversion operators that will never be used. */
11550 if (IDENTIFIER_TYPENAME_P (name
)
11551 && ! DECL_TEMPLATE_INFO (decl
)
11553 /* Warn only declaring the function; there is no need to
11554 warn again about out-of-class definitions. */
11555 && class_type
== current_class_type
)
11557 tree t
= TREE_TYPE (name
);
11558 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11561 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11563 if (VOID_TYPE_P (t
))
11564 warning (OPT_Wconversion
,
11566 ? G_("conversion to a reference to void "
11567 "will never use a type conversion operator")
11568 : G_("conversion to void "
11569 "will never use a type conversion operator"));
11570 else if (class_type
)
11572 if (t
== class_type
)
11573 warning (OPT_Wconversion
,
11575 ? G_("conversion to a reference to the same type "
11576 "will never use a type conversion operator")
11577 : G_("conversion to the same type "
11578 "will never use a type conversion operator"));
11579 /* Don't force t to be complete here. */
11580 else if (MAYBE_CLASS_TYPE_P (t
)
11581 && COMPLETE_TYPE_P (t
)
11582 && DERIVED_FROM_P (t
, class_type
))
11583 warning (OPT_Wconversion
,
11585 ? G_("conversion to a reference to a base class "
11586 "will never use a type conversion operator")
11587 : G_("conversion to a base class "
11588 "will never use a type conversion operator"));
11593 if (operator_code
== COND_EXPR
)
11596 error ("ISO C++ prohibits overloading operator ?:");
11599 else if (ellipsis_p
)
11601 error ("%qD must not have variable number of arguments", decl
);
11604 else if (ambi_op_p (operator_code
))
11607 /* We pick the one-argument operator codes by default, so
11608 we don't have to change anything. */
11610 else if (arity
== 2)
11612 /* If we thought this was a unary operator, we now know
11613 it to be a binary operator. */
11614 switch (operator_code
)
11617 operator_code
= MULT_EXPR
;
11621 operator_code
= BIT_AND_EXPR
;
11624 case UNARY_PLUS_EXPR
:
11625 operator_code
= PLUS_EXPR
;
11629 operator_code
= MINUS_EXPR
;
11632 case PREINCREMENT_EXPR
:
11633 operator_code
= POSTINCREMENT_EXPR
;
11636 case PREDECREMENT_EXPR
:
11637 operator_code
= POSTDECREMENT_EXPR
;
11641 gcc_unreachable ();
11644 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11646 if ((operator_code
== POSTINCREMENT_EXPR
11647 || operator_code
== POSTDECREMENT_EXPR
)
11648 && ! processing_template_decl
11649 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11652 error ("postfix %qD must take %<int%> as its argument",
11655 error ("postfix %qD must take %<int%> as its second "
11663 error ("%qD must take either zero or one argument", decl
);
11665 error ("%qD must take either one or two arguments", decl
);
11669 /* More Effective C++ rule 6. */
11671 && (operator_code
== POSTINCREMENT_EXPR
11672 || operator_code
== POSTDECREMENT_EXPR
11673 || operator_code
== PREINCREMENT_EXPR
11674 || operator_code
== PREDECREMENT_EXPR
))
11676 tree arg
= TREE_VALUE (argtypes
);
11677 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11678 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11679 arg
= TREE_TYPE (arg
);
11680 arg
= TYPE_MAIN_VARIANT (arg
);
11681 if (operator_code
== PREINCREMENT_EXPR
11682 || operator_code
== PREDECREMENT_EXPR
)
11684 if (TREE_CODE (ret
) != REFERENCE_TYPE
11685 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11687 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11688 build_reference_type (arg
));
11692 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11693 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11697 else if (unary_op_p (operator_code
))
11702 error ("%qD must take %<void%>", decl
);
11704 error ("%qD must take exactly one argument", decl
);
11708 else /* if (binary_op_p (operator_code)) */
11713 error ("%qD must take exactly one argument", decl
);
11715 error ("%qD must take exactly two arguments", decl
);
11719 /* More Effective C++ rule 7. */
11721 && (operator_code
== TRUTH_ANDIF_EXPR
11722 || operator_code
== TRUTH_ORIF_EXPR
11723 || operator_code
== COMPOUND_EXPR
))
11724 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11728 /* Effective C++ rule 23. */
11731 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11732 && (operator_code
== PLUS_EXPR
11733 || operator_code
== MINUS_EXPR
11734 || operator_code
== TRUNC_DIV_EXPR
11735 || operator_code
== MULT_EXPR
11736 || operator_code
== TRUNC_MOD_EXPR
)
11737 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11738 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11740 /* [over.oper]/8 */
11741 for (; argtypes
&& argtypes
!= void_list_node
;
11742 argtypes
= TREE_CHAIN (argtypes
))
11743 if (TREE_PURPOSE (argtypes
))
11745 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11746 if (operator_code
== POSTINCREMENT_EXPR
11747 || operator_code
== POSTDECREMENT_EXPR
)
11749 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11754 error ("%qD cannot have default arguments", decl
);
11762 /* Return a string giving the keyword associate with CODE. */
11764 static const char *
11765 tag_name (enum tag_types code
)
11777 case typename_type
:
11780 gcc_unreachable ();
11784 /* Name lookup in an elaborated-type-specifier (after the keyword
11785 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11786 elaborated-type-specifier is invalid, issue a diagnostic and return
11787 error_mark_node; otherwise, return the *_TYPE to which it referred.
11788 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11791 check_elaborated_type_specifier (enum tag_types tag_code
,
11793 bool allow_template_p
)
11799 struct S { struct S *p; };
11801 name lookup will find the TYPE_DECL for the implicit "S::S"
11802 typedef. Adjust for that here. */
11803 if (DECL_SELF_REFERENCE_P (decl
))
11804 decl
= TYPE_NAME (TREE_TYPE (decl
));
11806 type
= TREE_TYPE (decl
);
11808 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11809 is false for this case as well. */
11810 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11812 error ("using template type parameter %qT after %qs",
11813 type
, tag_name (tag_code
));
11814 return error_mark_node
;
11816 /* Accept template template parameters. */
11817 else if (allow_template_p
11818 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11819 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11823 If the identifier resolves to a typedef-name or the
11824 simple-template-id resolves to an alias template
11825 specialization, the elaborated-type-specifier is ill-formed.
11827 In other words, the only legitimate declaration to use in the
11828 elaborated type specifier is the implicit typedef created when
11829 the type is declared. */
11830 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11831 && !DECL_SELF_REFERENCE_P (decl
)
11832 && tag_code
!= typename_type
)
11834 if (alias_template_specialization_p (type
))
11835 error ("using alias template specialization %qT after %qs",
11836 type
, tag_name (tag_code
));
11838 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11839 inform (DECL_SOURCE_LOCATION (decl
),
11840 "%qD has a previous declaration here", decl
);
11841 return error_mark_node
;
11843 else if (TREE_CODE (type
) != RECORD_TYPE
11844 && TREE_CODE (type
) != UNION_TYPE
11845 && tag_code
!= enum_type
11846 && tag_code
!= typename_type
)
11848 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11849 error ("%q+T has a previous declaration here", type
);
11850 return error_mark_node
;
11852 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11853 && tag_code
== enum_type
)
11855 error ("%qT referred to as enum", type
);
11856 error ("%q+T has a previous declaration here", type
);
11857 return error_mark_node
;
11859 else if (!allow_template_p
11860 && TREE_CODE (type
) == RECORD_TYPE
11861 && CLASSTYPE_IS_TEMPLATE (type
))
11863 /* If a class template appears as elaborated type specifier
11864 without a template header such as:
11866 template <class T> class C {};
11867 void f(class C); // No template header here
11869 then the required template argument is missing. */
11870 error ("template argument required for %<%s %T%>",
11871 tag_name (tag_code
),
11872 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11873 return error_mark_node
;
11879 /* Lookup NAME in elaborate type specifier in scope according to
11880 SCOPE and issue diagnostics if necessary.
11881 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11882 found, and ERROR_MARK_NODE for type error. */
11885 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11886 tag_scope scope
, bool template_header_p
)
11890 if (scope
== ts_global
)
11892 /* First try ordinary name lookup, ignoring hidden class name
11893 injected via friend declaration. */
11894 decl
= lookup_name_prefer_type (name
, 2);
11895 /* If that fails, the name will be placed in the smallest
11896 non-class, non-function-prototype scope according to 3.3.1/5.
11897 We may already have a hidden name declared as friend in this
11898 scope. So lookup again but not ignoring hidden names.
11899 If we find one, that name will be made visible rather than
11900 creating a new tag. */
11902 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11905 decl
= lookup_type_scope (name
, scope
);
11908 && (DECL_CLASS_TEMPLATE_P (decl
)
11909 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11910 decl
= DECL_TEMPLATE_RESULT (decl
);
11912 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11914 /* Look for invalid nested type:
11918 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11920 error ("%qD has the same name as the class in which it is "
11923 return error_mark_node
;
11926 /* Two cases we need to consider when deciding if a class
11927 template is allowed as an elaborated type specifier:
11928 1. It is a self reference to its own class.
11929 2. It comes with a template header.
11933 template <class T> class C {
11934 class C *c1; // DECL_SELF_REFERENCE_P is true
11937 template <class U> class C; // template_header_p is true
11938 template <class T> class C<T>::D {
11939 class C *c2; // DECL_SELF_REFERENCE_P is true
11942 t
= check_elaborated_type_specifier (tag_code
,
11945 | DECL_SELF_REFERENCE_P (decl
));
11948 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11950 error ("reference to %qD is ambiguous", name
);
11951 print_candidates (decl
);
11952 return error_mark_node
;
11958 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11959 Define the tag as a forward-reference if it is not defined.
11961 If a declaration is given, process it here, and report an error if
11962 multiple declarations are not identical.
11964 SCOPE is TS_CURRENT when this is also a definition. Only look in
11965 the current frame for the name (since C++ allows new names in any
11966 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11967 declaration. Only look beginning from the current scope outward up
11968 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11970 TEMPLATE_HEADER_P is true when this declaration is preceded by
11971 a set of template parameters. */
11974 xref_tag_1 (enum tag_types tag_code
, tree name
,
11975 tag_scope orig_scope
, bool template_header_p
)
11977 enum tree_code code
;
11979 tree context
= NULL_TREE
;
11982 gcc_assert (identifier_p (name
));
11988 code
= RECORD_TYPE
;
11994 code
= ENUMERAL_TYPE
;
11997 gcc_unreachable ();
12000 if (orig_scope
== ts_lambda
)
12001 scope
= ts_current
;
12003 scope
= orig_scope
;
12005 /* In case of anonymous name, xref_tag is only called to
12006 make type node and push name. Name lookup is not required. */
12007 if (ANON_AGGRNAME_P (name
))
12010 t
= lookup_and_check_tag (tag_code
, name
,
12011 scope
, template_header_p
);
12013 if (t
== error_mark_node
)
12014 return error_mark_node
;
12016 if (scope
!= ts_current
&& t
&& current_class_type
12017 && template_class_depth (current_class_type
)
12018 && template_header_p
)
12020 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12023 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12024 definition of this tag. Since, in addition, we are currently
12025 processing a (member) template declaration of a template
12026 class, we must be very careful; consider:
12033 { template <class V>
12034 friend struct S1; };
12036 Here, the S2::S1 declaration should not be confused with the
12037 outer declaration. In particular, the inner version should
12038 have a template parameter of level 2, not level 1. This
12039 would be particularly important if the member declaration
12042 template <class V = U> friend struct S1;
12044 say, when we should tsubst into `U' when instantiating
12045 S2. On the other hand, when presented with:
12055 we must find the inner binding eventually. We
12056 accomplish this by making sure that the new type we
12057 create to represent this declaration has the right
12059 context
= TYPE_CONTEXT (t
);
12065 /* If no such tag is yet defined, create a forward-reference node
12066 and record it as the "definition".
12067 When a real declaration of this type is found,
12068 the forward-reference will be altered into a real type. */
12069 if (code
== ENUMERAL_TYPE
)
12071 error ("use of enum %q#D without previous declaration", name
);
12072 return error_mark_node
;
12076 t
= make_class_type (code
);
12077 TYPE_CONTEXT (t
) = context
;
12078 if (orig_scope
== ts_lambda
)
12079 /* Remember that we're declaring a lambda to avoid bogus errors
12080 in push_template_decl. */
12081 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12082 t
= pushtag (name
, t
, scope
);
12087 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12089 if (!redeclare_class_template (t
, current_template_parms
))
12090 return error_mark_node
;
12092 else if (!processing_template_decl
12093 && CLASS_TYPE_P (t
)
12094 && CLASSTYPE_IS_TEMPLATE (t
))
12096 error ("redeclaration of %qT as a non-template", t
);
12097 error ("previous declaration %q+D", t
);
12098 return error_mark_node
;
12101 /* Make injected friend class visible. */
12102 if (scope
!= ts_within_enclosing_non_class
12103 && hidden_name_p (TYPE_NAME (t
)))
12105 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12106 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12108 if (TYPE_TEMPLATE_INFO (t
))
12110 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12111 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12119 /* Wrapper for xref_tag_1. */
12122 xref_tag (enum tag_types tag_code
, tree name
,
12123 tag_scope scope
, bool template_header_p
)
12127 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12128 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12129 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12135 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12137 enum tag_types tag_kind
;
12139 if (TREE_CODE (old
) == RECORD_TYPE
)
12140 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12142 tag_kind
= union_type
;
12144 if (id
== NULL_TREE
)
12145 id
= TYPE_IDENTIFIER (old
);
12147 return xref_tag (tag_kind
, id
, scope
, false);
12150 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12151 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12152 access_* node, and the TREE_VALUE is the type of the base-class.
12153 Non-NULL TREE_TYPE indicates virtual inheritance.
12155 Returns true if the binfo hierarchy was successfully created,
12156 false if an error was detected. */
12159 xref_basetypes (tree ref
, tree base_list
)
12162 tree binfo
, base_binfo
;
12163 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12164 unsigned max_bases
= 0; /* Maximum direct bases. */
12166 tree default_access
;
12167 tree igo_prev
; /* Track Inheritance Graph Order. */
12169 if (ref
== error_mark_node
)
12172 /* The base of a derived class is private by default, all others are
12174 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12175 && CLASSTYPE_DECLARED_CLASS (ref
)
12176 ? access_private_node
: access_public_node
);
12178 /* First, make sure that any templates in base-classes are
12179 instantiated. This ensures that if we call ourselves recursively
12180 we do not get confused about which classes are marked and which
12182 basep
= &base_list
;
12185 tree basetype
= TREE_VALUE (*basep
);
12187 /* The dependent_type_p call below should really be dependent_scope_p
12188 so that we give a hard error about using an incomplete type as a
12189 base, but we allow it with a pedwarn for backward
12191 if (processing_template_decl
12192 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12193 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12194 if (!dependent_type_p (basetype
)
12195 && !complete_type_or_else (basetype
, NULL
))
12196 /* An incomplete type. Remove it from the list. */
12197 *basep
= TREE_CHAIN (*basep
);
12201 if (TREE_TYPE (*basep
))
12203 if (CLASS_TYPE_P (basetype
))
12204 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12205 basep
= &TREE_CHAIN (*basep
);
12209 TYPE_MARKED_P (ref
) = 1;
12211 /* The binfo slot should be empty, unless this is an (ill-formed)
12213 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12215 error ("redefinition of %q#T", ref
);
12219 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12221 binfo
= make_tree_binfo (max_bases
);
12223 TYPE_BINFO (ref
) = binfo
;
12224 BINFO_OFFSET (binfo
) = size_zero_node
;
12225 BINFO_TYPE (binfo
) = ref
;
12227 /* Apply base-class info set up to the variants of this type. */
12228 fixup_type_variants (ref
);
12232 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12233 /* An aggregate cannot have baseclasses. */
12234 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12236 if (TREE_CODE (ref
) == UNION_TYPE
)
12238 error ("derived union %qT invalid", ref
);
12245 if (TYPE_FOR_JAVA (ref
))
12247 error ("Java class %qT cannot have multiple bases", ref
);
12254 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12256 if (TYPE_FOR_JAVA (ref
))
12258 error ("Java class %qT cannot have virtual bases", ref
);
12263 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12265 tree access
= TREE_PURPOSE (base_list
);
12266 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12267 tree basetype
= TREE_VALUE (base_list
);
12269 if (access
== access_default_node
)
12270 access
= default_access
;
12272 if (PACK_EXPANSION_P (basetype
))
12273 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12274 if (TREE_CODE (basetype
) == TYPE_DECL
)
12275 basetype
= TREE_TYPE (basetype
);
12276 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12278 error ("base type %qT fails to be a struct or class type",
12283 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12284 TYPE_FOR_JAVA (ref
) = 1;
12286 base_binfo
= NULL_TREE
;
12287 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12289 base_binfo
= TYPE_BINFO (basetype
);
12290 /* The original basetype could have been a typedef'd type. */
12291 basetype
= BINFO_TYPE (base_binfo
);
12293 /* Inherit flags from the base. */
12294 TYPE_HAS_NEW_OPERATOR (ref
)
12295 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12296 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12297 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12298 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12299 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12300 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12301 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12302 CLASSTYPE_REPEATED_BASE_P (ref
)
12303 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12306 /* We must do this test after we've seen through a typedef
12308 if (TYPE_MARKED_P (basetype
))
12310 if (basetype
== ref
)
12311 error ("recursive type %qT undefined", basetype
);
12313 error ("duplicate base type %qT invalid", basetype
);
12317 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12318 /* Regenerate the pack expansion for the bases. */
12319 basetype
= make_pack_expansion (basetype
);
12321 TYPE_MARKED_P (basetype
) = 1;
12323 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12324 &igo_prev
, via_virtual
);
12325 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12326 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12328 BINFO_BASE_APPEND (binfo
, base_binfo
);
12329 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12332 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12333 /* If we didn't get max_vbases vbases, we must have shared at
12334 least one of them, and are therefore diamond shaped. */
12335 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12337 /* Unmark all the types. */
12338 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12339 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12340 TYPE_MARKED_P (ref
) = 0;
12342 /* Now see if we have a repeated base type. */
12343 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12345 for (base_binfo
= binfo
; base_binfo
;
12346 base_binfo
= TREE_CHAIN (base_binfo
))
12348 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12350 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12353 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12355 for (base_binfo
= binfo
; base_binfo
;
12356 base_binfo
= TREE_CHAIN (base_binfo
))
12357 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12358 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12367 /* Copies the enum-related properties from type SRC to type DST.
12368 Used with the underlying type of an enum and the enum itself. */
12370 copy_type_enum (tree dst
, tree src
)
12373 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12375 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12376 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12377 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12378 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12379 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12380 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12381 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12382 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12383 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12387 /* Begin compiling the definition of an enumeration type.
12390 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12392 UNDERLYING_TYPE is the type that will be used as the storage for
12393 the enumeration type. This should be NULL_TREE if no storage type
12396 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12398 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12400 Returns the type object, as yet incomplete.
12401 Also records info about it so that build_enumerator
12402 may be used to declare the individual values as they are read. */
12405 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12406 bool scoped_enum_p
, bool *is_new
)
12408 tree prevtype
= NULL_TREE
;
12409 gcc_assert (identifier_p (name
));
12413 /* [C++0x dcl.enum]p5:
12415 If not explicitly specified, the underlying type of a scoped
12416 enumeration type is int. */
12417 if (!underlying_type
&& scoped_enum_p
)
12418 underlying_type
= integer_type_node
;
12420 if (underlying_type
)
12421 underlying_type
= cv_unqualified (underlying_type
);
12423 /* If this is the real definition for a previous forward reference,
12424 fill in the contents in the same object that used to be the
12425 forward reference. */
12427 enumtype
= lookup_and_check_tag (enum_type
, name
,
12428 /*tag_scope=*/ts_current
,
12429 /*template_header_p=*/false);
12431 /* In case of a template_decl, the only check that should be deferred
12432 to instantiation time is the comparison of underlying types. */
12433 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12435 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12437 error_at (input_location
, "scoped/unscoped mismatch "
12438 "in enum %q#T", enumtype
);
12439 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12440 "previous definition here");
12441 enumtype
= error_mark_node
;
12443 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12445 error_at (input_location
, "underlying type mismatch "
12446 "in enum %q#T", enumtype
);
12447 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12448 "previous definition here");
12449 enumtype
= error_mark_node
;
12451 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12452 && !dependent_type_p (underlying_type
)
12453 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12454 && !same_type_p (underlying_type
,
12455 ENUM_UNDERLYING_TYPE (enumtype
)))
12457 error_at (input_location
, "different underlying type "
12458 "in enum %q#T", enumtype
);
12459 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12460 "previous definition here");
12461 underlying_type
= NULL_TREE
;
12465 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12466 || processing_template_decl
)
12468 /* In case of error, make a dummy enum to allow parsing to
12470 if (enumtype
== error_mark_node
)
12472 name
= make_anon_name ();
12473 enumtype
= NULL_TREE
;
12476 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12477 of an opaque enum, or an opaque enum of an already defined
12478 enumeration (C++0x only).
12479 In any other case, it'll be NULL_TREE. */
12485 prevtype
= enumtype
;
12487 /* Do not push the decl more than once, unless we need to
12488 compare underlying types at instantiation time */
12490 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12491 || (underlying_type
12492 && dependent_type_p (underlying_type
))
12493 || (ENUM_UNDERLYING_TYPE (enumtype
)
12494 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12496 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12497 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12500 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12503 if (enumtype
== error_mark_node
)
12504 return error_mark_node
;
12506 /* The enum is considered opaque until the opening '{' of the
12507 enumerator list. */
12508 SET_OPAQUE_ENUM_P (enumtype
, true);
12509 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12512 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12514 if (underlying_type
)
12516 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12518 copy_type_enum (enumtype
, underlying_type
);
12519 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12521 else if (dependent_type_p (underlying_type
))
12522 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12524 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12525 underlying_type
, enumtype
);
12528 /* If into a template class, the returned enum is always the first
12529 declaration (opaque or not) seen. This way all the references to
12530 this type will be to the same declaration. The following ones are used
12531 only to check for definition errors. */
12532 if (prevtype
&& processing_template_decl
)
12538 /* After processing and defining all the values of an enumeration type,
12539 install their decls in the enumeration type.
12540 ENUMTYPE is the type object. */
12543 finish_enum_value_list (tree enumtype
)
12546 tree underlying_type
;
12549 tree minnode
, maxnode
;
12552 bool fixed_underlying_type_p
12553 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12555 /* We built up the VALUES in reverse order. */
12556 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12558 /* For an enum defined in a template, just set the type of the values;
12559 all further processing is postponed until the template is
12560 instantiated. We need to set the type so that tsubst of a CONST_DECL
12562 if (processing_template_decl
)
12564 for (values
= TYPE_VALUES (enumtype
);
12566 values
= TREE_CHAIN (values
))
12567 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12571 /* Determine the minimum and maximum values of the enumerators. */
12572 if (TYPE_VALUES (enumtype
))
12574 minnode
= maxnode
= NULL_TREE
;
12576 for (values
= TYPE_VALUES (enumtype
);
12578 values
= TREE_CHAIN (values
))
12580 decl
= TREE_VALUE (values
);
12582 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12583 each enumerator has the type of its enumeration. Prior to the
12584 closing brace, the type of each enumerator is the type of its
12585 initializing value. */
12586 TREE_TYPE (decl
) = enumtype
;
12588 /* Update the minimum and maximum values, if appropriate. */
12589 value
= DECL_INITIAL (decl
);
12590 if (value
== error_mark_node
)
12591 value
= integer_zero_node
;
12592 /* Figure out what the minimum and maximum values of the
12593 enumerators are. */
12595 minnode
= maxnode
= value
;
12596 else if (tree_int_cst_lt (maxnode
, value
))
12598 else if (tree_int_cst_lt (value
, minnode
))
12605 If the enumerator-list is empty, the underlying type is as if
12606 the enumeration had a single enumerator with value 0. */
12607 minnode
= maxnode
= integer_zero_node
;
12609 if (!fixed_underlying_type_p
)
12611 /* Compute the number of bits require to represent all values of the
12612 enumeration. We must do this before the type of MINNODE and
12613 MAXNODE are transformed, since tree_int_cst_min_precision relies
12614 on the TREE_TYPE of the value it is passed. */
12615 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12616 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12617 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12618 int precision
= MAX (lowprec
, highprec
);
12620 bool use_short_enum
;
12622 /* Determine the underlying type of the enumeration.
12626 The underlying type of an enumeration is an integral type that
12627 can represent all the enumerator values defined in the
12628 enumeration. It is implementation-defined which integral type is
12629 used as the underlying type for an enumeration except that the
12630 underlying type shall not be larger than int unless the value of
12631 an enumerator cannot fit in an int or unsigned int.
12633 We use "int" or an "unsigned int" as the underlying type, even if
12634 a smaller integral type would work, unless the user has
12635 explicitly requested that we use the smallest possible type. The
12636 user can request that for all enumerations with a command line
12637 flag, or for just one enumeration with an attribute. */
12639 use_short_enum
= flag_short_enums
12640 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12642 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12646 underlying_type
= integer_types
[itk
];
12647 if (underlying_type
!= NULL_TREE
12648 && TYPE_PRECISION (underlying_type
) >= precision
12649 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12652 if (itk
== itk_none
)
12656 IF no integral type can represent all the enumerator values, the
12657 enumeration is ill-formed. */
12658 error ("no integral type can represent all of the enumerator values "
12659 "for %qT", enumtype
);
12660 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12661 underlying_type
= integer_types
[itk_unsigned_long_long
];
12666 The value of sizeof() applied to an enumeration type, an object
12667 of an enumeration type, or an enumerator, is the value of sizeof()
12668 applied to the underlying type. */
12669 copy_type_enum (enumtype
, underlying_type
);
12671 /* Compute the minimum and maximum values for the type.
12675 For an enumeration where emin is the smallest enumerator and emax
12676 is the largest, the values of the enumeration are the values of the
12677 underlying type in the range bmin to bmax, where bmin and bmax are,
12678 respectively, the smallest and largest values of the smallest bit-
12679 field that can store emin and emax. */
12681 /* The middle-end currently assumes that types with TYPE_PRECISION
12682 narrower than their underlying type are suitably zero or sign
12683 extended to fill their mode. Similarly, it assumes that the front
12684 end assures that a value of a particular type must be within
12685 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12687 We used to set these fields based on bmin and bmax, but that led
12688 to invalid assumptions like optimizing away bounds checking. So
12689 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12690 TYPE_MAX_VALUE to the values for the mode above and only restrict
12691 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12692 ENUM_UNDERLYING_TYPE (enumtype
)
12693 = build_distinct_type_copy (underlying_type
);
12694 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12695 set_min_and_max_values_for_integral_type
12696 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12698 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12699 if (flag_strict_enums
)
12700 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12704 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12706 /* Convert each of the enumerators to the type of the underlying
12707 type of the enumeration. */
12708 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12710 location_t saved_location
;
12712 decl
= TREE_VALUE (values
);
12713 saved_location
= input_location
;
12714 input_location
= DECL_SOURCE_LOCATION (decl
);
12715 if (fixed_underlying_type_p
)
12716 /* If the enumeration type has a fixed underlying type, we
12717 already checked all of the enumerator values. */
12718 value
= DECL_INITIAL (decl
);
12720 value
= perform_implicit_conversion (underlying_type
,
12721 DECL_INITIAL (decl
),
12722 tf_warning_or_error
);
12723 input_location
= saved_location
;
12725 /* Do not clobber shared ints. */
12726 value
= copy_node (value
);
12728 TREE_TYPE (value
) = enumtype
;
12729 DECL_INITIAL (decl
) = value
;
12732 /* Fix up all variant types of this enum type. */
12733 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12734 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12736 if (at_class_scope_p ()
12737 && COMPLETE_TYPE_P (current_class_type
)
12738 && UNSCOPED_ENUM_P (enumtype
))
12739 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12740 current_class_type
);
12742 /* Finish debugging output for this type. */
12743 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12746 /* Finishes the enum type. This is called only the first time an
12747 enumeration is seen, be it opaque or odinary.
12748 ENUMTYPE is the type object. */
12751 finish_enum (tree enumtype
)
12753 if (processing_template_decl
)
12755 if (at_function_scope_p ())
12756 add_stmt (build_min (TAG_DEFN
, enumtype
));
12760 /* If this is a forward declaration, there should not be any variants,
12761 though we can get a variant in the middle of an enum-specifier with
12762 wacky code like 'enum E { e = sizeof(const E*) };' */
12763 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12764 && (TYPE_VALUES (enumtype
)
12765 || !TYPE_NEXT_VARIANT (enumtype
)));
12768 /* Build and install a CONST_DECL for an enumeration constant of the
12769 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12770 LOC is the location of NAME.
12771 Assignment of sequential values by default is handled here. */
12774 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12780 /* If the VALUE was erroneous, pretend it wasn't there; that will
12781 result in the enum being assigned the next value in sequence. */
12782 if (value
== error_mark_node
)
12785 /* Remove no-op casts from the value. */
12787 STRIP_TYPE_NOPS (value
);
12789 if (! processing_template_decl
)
12791 /* Validate and default VALUE. */
12792 if (value
!= NULL_TREE
)
12794 value
= cxx_constant_value (value
);
12796 if (TREE_CODE (value
) != INTEGER_CST
12797 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12799 error ("enumerator value for %qD is not an integer constant",
12805 /* Default based on previous value. */
12806 if (value
== NULL_TREE
)
12808 if (TYPE_VALUES (enumtype
))
12813 /* C++03 7.2/4: If no initializer is specified for the first
12814 enumerator, the type is an unspecified integral
12815 type. Otherwise the type is the same as the type of the
12816 initializing value of the preceding enumerator unless the
12817 incremented value is not representable in that type, in
12818 which case the type is an unspecified integral type
12819 sufficient to contain the incremented value. */
12820 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12821 if (error_operand_p (prev_value
))
12822 value
= error_mark_node
;
12825 double_int di
= TREE_INT_CST (prev_value
)
12826 .add_with_sign (double_int_one
,
12827 false, &overflowed
);
12830 tree type
= TREE_TYPE (prev_value
);
12831 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12832 if (!double_int_fits_to_tree_p (type
, di
))
12835 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12837 type
= integer_types
[itk
];
12838 if (type
!= NULL_TREE
12839 && (pos
|| !TYPE_UNSIGNED (type
))
12840 && double_int_fits_to_tree_p (type
, di
))
12843 if (type
&& cxx_dialect
< cxx0x
12844 && itk
> itk_unsigned_long
)
12845 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12846 incremented enumerator value is too large for %<unsigned long%>" : "\
12847 incremented enumerator value is too large for %<long%>");
12849 if (type
== NULL_TREE
)
12852 value
= double_int_to_tree (type
, di
);
12857 error ("overflow in enumeration values at %qD", name
);
12858 value
= error_mark_node
;
12863 value
= integer_zero_node
;
12866 /* Remove no-op casts from the value. */
12867 STRIP_TYPE_NOPS (value
);
12869 /* If the underlying type of the enum is fixed, check whether
12870 the enumerator values fits in the underlying type. If it
12871 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12872 if (ENUM_UNDERLYING_TYPE (enumtype
)
12874 && TREE_CODE (value
) == INTEGER_CST
)
12876 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12877 error ("enumerator value %E is outside the range of underlying "
12878 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12880 /* Convert the value to the appropriate type. */
12881 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12885 /* C++ associates enums with global, function, or class declarations. */
12886 context
= current_scope ();
12888 /* Build the actual enumeration constant. Note that the enumeration
12889 constants have the underlying type of the enum (if it is fixed)
12890 or the type of their initializer (if the underlying type of the
12891 enum is not fixed):
12895 If the underlying type is fixed, the type of each enumerator
12896 prior to the closing brace is the underlying type; if the
12897 initializing value of an enumerator cannot be represented by
12898 the underlying type, the program is ill-formed. If the
12899 underlying type is not fixed, the type of each enumerator is
12900 the type of its initializing value.
12902 If the underlying type is not fixed, it will be computed by
12903 finish_enum and we will reset the type of this enumerator. Of
12904 course, if we're processing a template, there may be no value. */
12905 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12907 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12909 DECL_CONTEXT (decl
) = enumtype
;
12910 TREE_CONSTANT (decl
) = 1;
12911 TREE_READONLY (decl
) = 1;
12912 DECL_INITIAL (decl
) = value
;
12914 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12915 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12916 on the TYPE_FIELDS list for `S'. (That's so that you can say
12917 things like `S::i' later.) */
12918 finish_member_declaration (decl
);
12922 /* Add this enumeration constant to the list for this type. */
12923 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12926 /* Look for an enumerator with the given NAME within the enumeration
12927 type ENUMTYPE. This routine is used primarily for qualified name
12928 lookup into an enumerator in C++0x, e.g.,
12930 enum class Color { Red, Green, Blue };
12932 Color color = Color::Red;
12934 Returns the value corresponding to the enumerator, or
12935 NULL_TREE if no such enumerator was found. */
12937 lookup_enumerator (tree enumtype
, tree name
)
12940 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12942 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12943 return e
? TREE_VALUE (e
) : NULL_TREE
;
12947 /* We're defining DECL. Make sure that its type is OK. */
12950 check_function_type (tree decl
, tree current_function_parms
)
12952 tree fntype
= TREE_TYPE (decl
);
12953 tree return_type
= complete_type (TREE_TYPE (fntype
));
12955 /* In a function definition, arg types must be complete. */
12956 require_complete_types_for_parms (current_function_parms
);
12958 if (dependent_type_p (return_type
)
12959 || type_uses_auto (return_type
))
12961 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12962 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12964 tree args
= TYPE_ARG_TYPES (fntype
);
12966 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12967 error ("return type %q#T is incomplete", return_type
);
12969 error ("return type has Java class type %q#T", return_type
);
12971 /* Make it return void instead. */
12972 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12973 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12975 TREE_CHAIN (args
));
12977 fntype
= build_function_type (void_type_node
, args
);
12979 = build_exception_variant (fntype
,
12980 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12981 fntype
= (cp_build_type_attribute_variant
12982 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12983 TREE_TYPE (decl
) = fntype
;
12986 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12989 /* Create the FUNCTION_DECL for a function definition.
12990 DECLSPECS and DECLARATOR are the parts of the declaration;
12991 they describe the function's name and the type it returns,
12992 but twisted together in a fashion that parallels the syntax of C.
12994 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12995 DECLARATOR is really the DECL for the function we are about to
12996 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12997 indicating that the function is an inline defined in-class.
12999 This function creates a binding context for the function body
13000 as well as setting up the FUNCTION_DECL in current_function_decl.
13002 For C++, we must first check whether that datum makes any sense.
13003 For example, "class A local_a(1,2);" means that variable local_a
13004 is an aggregate of type A, which should have a constructor
13005 applied to it with the argument list [1, 2].
13007 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13008 or may be a BLOCK if the function has been defined previously
13009 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13010 error_mark_node if the function has never been defined, or
13011 a BLOCK if the function has been defined somewhere. */
13014 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13016 tree ctype
= NULL_TREE
;
13019 int doing_friend
= 0;
13020 cp_binding_level
*bl
;
13021 tree current_function_parms
;
13022 struct c_fileinfo
*finfo
13023 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13024 bool honor_interface
;
13026 /* Sanity check. */
13027 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13028 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13030 fntype
= TREE_TYPE (decl1
);
13031 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13032 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13034 /* ISO C++ 11.4/5. A friend function defined in a class is in
13035 the (lexical) scope of the class in which it is defined. */
13036 if (!ctype
&& DECL_FRIEND_P (decl1
))
13038 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13040 /* CTYPE could be null here if we're dealing with a template;
13041 for example, `inline friend float foo()' inside a template
13042 will have no CTYPE set. */
13043 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13049 if (DECL_DECLARED_INLINE_P (decl1
)
13050 && lookup_attribute ("noinline", attrs
))
13051 warning (0, "inline function %q+D given attribute noinline", decl1
);
13053 /* Handle gnu_inline attribute. */
13054 if (GNU_INLINE_P (decl1
))
13056 DECL_EXTERNAL (decl1
) = 1;
13057 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13058 DECL_INTERFACE_KNOWN (decl1
) = 1;
13059 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13062 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13063 /* This is a constructor, we must ensure that any default args
13064 introduced by this definition are propagated to the clones
13065 now. The clones are used directly in overload resolution. */
13066 adjust_clone_args (decl1
);
13068 /* Sometimes we don't notice that a function is a static member, and
13069 build a METHOD_TYPE for it. Fix that up now. */
13070 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13071 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13073 /* Set up current_class_type, and enter the scope of the class, if
13076 push_nested_class (ctype
);
13077 else if (DECL_STATIC_FUNCTION_P (decl1
))
13078 push_nested_class (DECL_CONTEXT (decl1
));
13080 /* Now that we have entered the scope of the class, we must restore
13081 the bindings for any template parameters surrounding DECL1, if it
13082 is an inline member template. (Order is important; consider the
13083 case where a template parameter has the same name as a field of
13084 the class.) It is not until after this point that
13085 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13086 if (flags
& SF_INCLASS_INLINE
)
13087 maybe_begin_member_template_processing (decl1
);
13089 /* Effective C++ rule 15. */
13091 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13092 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13093 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13095 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13096 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13097 if (!DECL_INITIAL (decl1
))
13098 DECL_INITIAL (decl1
) = error_mark_node
;
13100 /* This function exists in static storage.
13101 (This does not mean `static' in the C sense!) */
13102 TREE_STATIC (decl1
) = 1;
13104 /* We must call push_template_decl after current_class_type is set
13105 up. (If we are processing inline definitions after exiting a
13106 class scope, current_class_type will be NULL_TREE until set above
13107 by push_nested_class.) */
13108 if (processing_template_decl
)
13110 /* FIXME: Handle error_mark_node more gracefully. */
13111 tree newdecl1
= push_template_decl (decl1
);
13112 if (newdecl1
!= error_mark_node
)
13116 /* We are now in the scope of the function being defined. */
13117 current_function_decl
= decl1
;
13119 /* Save the parm names or decls from this function's declarator
13120 where store_parm_decls will find them. */
13121 current_function_parms
= DECL_ARGUMENTS (decl1
);
13123 /* Make sure the parameter and return types are reasonable. When
13124 you declare a function, these types can be incomplete, but they
13125 must be complete when you define the function. */
13126 check_function_type (decl1
, current_function_parms
);
13128 /* Build the return declaration for the function. */
13129 restype
= TREE_TYPE (fntype
);
13131 if (DECL_RESULT (decl1
) == NULL_TREE
)
13135 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13136 DECL_ARTIFICIAL (resdecl
) = 1;
13137 DECL_IGNORED_P (resdecl
) = 1;
13138 DECL_RESULT (decl1
) = resdecl
;
13140 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13143 /* Let the user know we're compiling this function. */
13144 announce_function (decl1
);
13146 /* Record the decl so that the function name is defined.
13147 If we already have a decl for this name, and it is a FUNCTION_DECL,
13148 use the old decl. */
13149 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13151 /* A specialization is not used to guide overload resolution. */
13152 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13153 && !(DECL_USE_TEMPLATE (decl1
) &&
13154 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13156 tree olddecl
= pushdecl (decl1
);
13158 if (olddecl
== error_mark_node
)
13159 /* If something went wrong when registering the declaration,
13160 use DECL1; we have to have a FUNCTION_DECL to use when
13161 parsing the body of the function. */
13165 /* Otherwise, OLDDECL is either a previous declaration
13166 of the same function or DECL1 itself. */
13168 if (warn_missing_declarations
13169 && olddecl
== decl1
13170 && !DECL_MAIN_P (decl1
)
13171 && TREE_PUBLIC (decl1
)
13172 && !DECL_DECLARED_INLINE_P (decl1
))
13176 /* Check whether DECL1 is in an anonymous
13178 for (context
= DECL_CONTEXT (decl1
);
13180 context
= DECL_CONTEXT (context
))
13182 if (TREE_CODE (context
) == NAMESPACE_DECL
13183 && DECL_NAME (context
) == NULL_TREE
)
13187 if (context
== NULL
)
13188 warning (OPT_Wmissing_declarations
,
13189 "no previous declaration for %q+D", decl1
);
13197 /* We need to set the DECL_CONTEXT. */
13198 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13199 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13201 fntype
= TREE_TYPE (decl1
);
13202 restype
= TREE_TYPE (fntype
);
13204 /* If #pragma weak applies, mark the decl appropriately now.
13205 The pragma only applies to global functions. Because
13206 determining whether or not the #pragma applies involves
13207 computing the mangled name for the declaration, we cannot
13208 apply the pragma until after we have merged this declaration
13209 with any previous declarations; if the original declaration
13210 has a linkage specification, that specification applies to
13211 the definition as well, and may affect the mangled name. */
13212 if (DECL_FILE_SCOPE_P (decl1
))
13213 maybe_apply_pragma_weak (decl1
);
13216 /* Reset this in case the call to pushdecl changed it. */
13217 current_function_decl
= decl1
;
13219 gcc_assert (DECL_INITIAL (decl1
));
13221 /* This function may already have been parsed, in which case just
13222 return; our caller will skip over the body without parsing. */
13223 if (DECL_INITIAL (decl1
) != error_mark_node
)
13226 /* Initialize RTL machinery. We cannot do this until
13227 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13228 even when processing a template; this is how we get
13229 CFUN set up, and our per-function variables initialized.
13230 FIXME factor out the non-RTL stuff. */
13231 bl
= current_binding_level
;
13232 allocate_struct_function (decl1
, processing_template_decl
);
13234 /* Initialize the language data structures. Whenever we start
13235 a new function, we destroy temporaries in the usual way. */
13236 cfun
->language
= ggc_alloc_cleared_language_function ();
13237 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13238 current_binding_level
= bl
;
13240 if (!processing_template_decl
&& type_uses_auto (restype
))
13242 FNDECL_USED_AUTO (decl1
) = true;
13243 current_function_auto_return_pattern
= restype
;
13246 /* Start the statement-tree, start the tree now. */
13247 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13249 /* If we are (erroneously) defining a function that we have already
13250 defined before, wipe out what we knew before. */
13251 if (!DECL_PENDING_INLINE_P (decl1
))
13252 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13254 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13256 /* We know that this was set up by `grokclassfn'. We do not
13257 wait until `store_parm_decls', since evil parse errors may
13258 never get us to that point. Here we keep the consistency
13259 between `current_class_type' and `current_class_ptr'. */
13260 tree t
= DECL_ARGUMENTS (decl1
);
13262 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13263 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13265 cp_function_chain
->x_current_class_ref
13266 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13267 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13268 cp_function_chain
->x_current_class_ptr
= t
;
13270 /* Constructors and destructors need to know whether they're "in
13271 charge" of initializing virtual base classes. */
13272 t
= DECL_CHAIN (t
);
13273 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13275 current_in_charge_parm
= t
;
13276 t
= DECL_CHAIN (t
);
13278 if (DECL_HAS_VTT_PARM_P (decl1
))
13280 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13281 current_vtt_parm
= t
;
13285 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13286 /* Implicitly-defined methods (like the
13287 destructor for a class in which no destructor
13288 is explicitly declared) must not be defined
13289 until their definition is needed. So, we
13290 ignore interface specifications for
13291 compiler-generated functions. */
13292 && !DECL_ARTIFICIAL (decl1
));
13294 if (processing_template_decl
)
13295 /* Don't mess with interface flags. */;
13296 else if (DECL_INTERFACE_KNOWN (decl1
))
13298 tree ctx
= decl_function_context (decl1
);
13300 if (DECL_NOT_REALLY_EXTERN (decl1
))
13301 DECL_EXTERNAL (decl1
) = 0;
13303 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13304 /* This is a function in a local class in an extern inline
13305 or template function. */
13306 comdat_linkage (decl1
);
13308 /* If this function belongs to an interface, it is public.
13309 If it belongs to someone else's interface, it is also external.
13310 This only affects inlines and template instantiations. */
13311 else if (!finfo
->interface_unknown
&& honor_interface
)
13313 if (DECL_DECLARED_INLINE_P (decl1
)
13314 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13316 DECL_EXTERNAL (decl1
)
13317 = (finfo
->interface_only
13318 || (DECL_DECLARED_INLINE_P (decl1
)
13319 && ! flag_implement_inlines
13320 && !DECL_VINDEX (decl1
)));
13322 /* For WIN32 we also want to put these in linkonce sections. */
13323 maybe_make_one_only (decl1
);
13326 DECL_EXTERNAL (decl1
) = 0;
13327 DECL_INTERFACE_KNOWN (decl1
) = 1;
13328 /* If this function is in an interface implemented in this file,
13329 make sure that the back end knows to emit this function
13331 if (!DECL_EXTERNAL (decl1
))
13332 mark_needed (decl1
);
13334 else if (finfo
->interface_unknown
&& finfo
->interface_only
13335 && honor_interface
)
13337 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13338 interface, we will have both finfo->interface_unknown and
13339 finfo->interface_only set. In that case, we don't want to
13340 use the normal heuristics because someone will supply a
13341 #pragma implementation elsewhere, and deducing it here would
13342 produce a conflict. */
13343 comdat_linkage (decl1
);
13344 DECL_EXTERNAL (decl1
) = 0;
13345 DECL_INTERFACE_KNOWN (decl1
) = 1;
13346 DECL_DEFER_OUTPUT (decl1
) = 1;
13350 /* This is a definition, not a reference.
13351 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13352 if (!GNU_INLINE_P (decl1
))
13353 DECL_EXTERNAL (decl1
) = 0;
13355 if ((DECL_DECLARED_INLINE_P (decl1
)
13356 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13357 && ! DECL_INTERFACE_KNOWN (decl1
))
13358 DECL_DEFER_OUTPUT (decl1
) = 1;
13360 DECL_INTERFACE_KNOWN (decl1
) = 1;
13363 /* Determine the ELF visibility attribute for the function. We must not
13364 do this before calling "pushdecl", as we must allow "duplicate_decls"
13365 to merge any attributes appropriately. We also need to wait until
13367 if (!DECL_CLONED_FUNCTION_P (decl1
))
13368 determine_visibility (decl1
);
13370 begin_scope (sk_function_parms
, decl1
);
13374 if (DECL_DESTRUCTOR_P (decl1
)
13375 || (DECL_CONSTRUCTOR_P (decl1
)
13376 && targetm
.cxx
.cdtor_returns_this ()))
13378 cdtor_label
= build_decl (input_location
,
13379 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13380 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13383 start_fname_decls ();
13385 store_parm_decls (current_function_parms
);
13389 /* Like start_preparsed_function, except that instead of a
13390 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13392 Returns 1 on success. If the DECLARATOR is not suitable for a function
13393 (it defines a datum instead), we return 0, which tells
13394 yyparse to report a parse error. */
13397 start_function (cp_decl_specifier_seq
*declspecs
,
13398 const cp_declarator
*declarator
,
13403 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13404 if (decl1
== error_mark_node
)
13406 /* If the declarator is not suitable for a function definition,
13407 cause a syntax error. */
13408 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13410 error ("invalid function declaration");
13414 if (DECL_MAIN_P (decl1
))
13415 /* main must return int. grokfndecl should have corrected it
13416 (and issued a diagnostic) if the user got it wrong. */
13417 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13418 integer_type_node
));
13420 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13425 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13429 use_eh_spec_block (tree fn
)
13431 return (flag_exceptions
&& flag_enforce_eh_specs
13432 && !processing_template_decl
13433 && !type_throw_all_p (TREE_TYPE (fn
))
13434 /* We insert the EH_SPEC_BLOCK only in the original
13435 function; then, it is copied automatically to the
13437 && !DECL_CLONED_FUNCTION_P (fn
)
13438 /* Implicitly-generated constructors and destructors have
13439 exception specifications. However, those specifications
13440 are the union of the possible exceptions specified by the
13441 constructors/destructors for bases and members, so no
13442 unallowed exception will ever reach this function. By
13443 not creating the EH_SPEC_BLOCK we save a little memory,
13444 and we avoid spurious warnings about unreachable
13446 && !DECL_DEFAULTED_FN (fn
));
13449 /* Store the parameter declarations into the current function declaration.
13450 This is called after parsing the parameter declarations, before
13451 digesting the body of the function.
13453 Also install to binding contour return value identifier, if any. */
13456 store_parm_decls (tree current_function_parms
)
13458 tree fndecl
= current_function_decl
;
13461 /* This is a chain of any other decls that came in among the parm
13462 declarations. If a parm is declared with enum {foo, bar} x;
13463 then CONST_DECLs for foo and bar are put here. */
13464 tree nonparms
= NULL_TREE
;
13466 if (current_function_parms
)
13468 /* This case is when the function was defined with an ANSI prototype.
13469 The parms already have decls, so we need not do anything here
13470 except record them as in effect
13471 and complain if any redundant old-style parm decls were written. */
13473 tree specparms
= current_function_parms
;
13476 /* Must clear this because it might contain TYPE_DECLs declared
13478 current_binding_level
->names
= NULL
;
13480 /* If we're doing semantic analysis, then we'll call pushdecl
13481 for each of these. We must do them in reverse order so that
13482 they end in the correct forward order. */
13483 specparms
= nreverse (specparms
);
13485 for (parm
= specparms
; parm
; parm
= next
)
13487 next
= DECL_CHAIN (parm
);
13488 if (TREE_CODE (parm
) == PARM_DECL
)
13490 if (DECL_NAME (parm
) == NULL_TREE
13491 || !VOID_TYPE_P (parm
))
13494 error ("parameter %qD declared void", parm
);
13498 /* If we find an enum constant or a type tag,
13499 put it aside for the moment. */
13500 TREE_CHAIN (parm
) = NULL_TREE
;
13501 nonparms
= chainon (nonparms
, parm
);
13505 /* Get the decls in their original chain order and record in the
13506 function. This is all and only the PARM_DECLs that were
13507 pushed into scope by the loop above. */
13508 DECL_ARGUMENTS (fndecl
) = getdecls ();
13511 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13513 /* Now store the final chain of decls for the arguments
13514 as the decl-chain of the current lexical scope.
13515 Put the enumerators in as well, at the front so that
13516 DECL_ARGUMENTS is not modified. */
13517 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13519 if (use_eh_spec_block (current_function_decl
))
13520 current_eh_spec_block
= begin_eh_spec_block ();
13524 /* We have finished doing semantic analysis on DECL, but have not yet
13525 generated RTL for its body. Save away our current state, so that
13526 when we want to generate RTL later we know what to do. */
13529 save_function_data (tree decl
)
13531 struct language_function
*f
;
13533 /* Save the language-specific per-function data so that we can
13534 get it back when we really expand this function. */
13535 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13538 f
= ggc_alloc_language_function ();
13539 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13540 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13542 /* Clear out the bits we don't need. */
13543 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13544 f
->bindings
= NULL
;
13545 f
->x_local_names
= NULL
;
13546 f
->base
.local_typedefs
= NULL
;
13550 /* Set the return value of the constructor (if present). */
13553 finish_constructor_body (void)
13558 if (targetm
.cxx
.cdtor_returns_this ()
13559 && (! TYPE_FOR_JAVA (current_class_type
)))
13561 /* Any return from a constructor will end up here. */
13562 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13564 val
= DECL_ARGUMENTS (current_function_decl
);
13565 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13566 DECL_RESULT (current_function_decl
), val
);
13567 /* Return the address of the object. */
13568 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13569 add_stmt (exprstmt
);
13573 /* Do all the processing for the beginning of a destructor; set up the
13574 vtable pointers and cleanups for bases and members. */
13577 begin_destructor_body (void)
13579 tree compound_stmt
;
13581 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13582 issued an error message. We still want to try to process the
13583 body of the function, but initialize_vtbl_ptrs will crash if
13584 TYPE_BINFO is NULL. */
13585 if (COMPLETE_TYPE_P (current_class_type
))
13587 compound_stmt
= begin_compound_stmt (0);
13588 /* Make all virtual function table pointers in non-virtual base
13589 classes point to CURRENT_CLASS_TYPE's virtual function
13591 initialize_vtbl_ptrs (current_class_ptr
);
13592 finish_compound_stmt (compound_stmt
);
13594 /* Insert a cleanup to let the back end know that the object is dead
13595 when we exit the destructor, either normally or via exception. */
13596 tree clobber
= build_constructor (current_class_type
, NULL
);
13597 TREE_THIS_VOLATILE (clobber
) = true;
13598 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13599 current_class_ref
, clobber
);
13600 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13602 /* And insert cleanups for our bases and members so that they
13603 will be properly destroyed if we throw. */
13604 push_base_cleanups ();
13608 /* At the end of every destructor we generate code to delete the object if
13609 necessary. Do that now. */
13612 finish_destructor_body (void)
13616 /* Any return from a destructor will end up here; that way all base
13617 and member cleanups will be run when the function returns. */
13618 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13620 /* In a virtual destructor, we must call delete. */
13621 if (DECL_VIRTUAL_P (current_function_decl
))
13624 tree virtual_size
= cxx_sizeof (current_class_type
);
13628 At the point of definition of a virtual destructor (including
13629 an implicit definition), non-placement operator delete shall
13630 be looked up in the scope of the destructor's class and if
13631 found shall be accessible and unambiguous. */
13632 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13634 /*global_p=*/false,
13635 /*placement=*/NULL_TREE
,
13636 /*alloc_fn=*/NULL_TREE
,
13637 tf_warning_or_error
);
13639 if_stmt
= begin_if_stmt ();
13640 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13641 current_in_charge_parm
,
13644 finish_expr_stmt (exprstmt
);
13645 finish_then_clause (if_stmt
);
13646 finish_if_stmt (if_stmt
);
13649 if (targetm
.cxx
.cdtor_returns_this ())
13653 val
= DECL_ARGUMENTS (current_function_decl
);
13654 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13655 DECL_RESULT (current_function_decl
), val
);
13656 /* Return the address of the object. */
13657 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13658 add_stmt (exprstmt
);
13662 /* Do the necessary processing for the beginning of a function body, which
13663 in this case includes member-initializers, but not the catch clauses of
13664 a function-try-block. Currently, this means opening a binding level
13665 for the member-initializers (in a ctor), member cleanups (in a dtor),
13666 and capture proxies (in a lambda operator()). */
13669 begin_function_body (void)
13673 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13676 if (processing_template_decl
)
13677 /* Do nothing now. */;
13679 /* Always keep the BLOCK node associated with the outermost pair of
13680 curly braces of a function. These are needed for correct
13681 operation of dwarfout.c. */
13682 keep_next_level (true);
13684 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13686 if (processing_template_decl
)
13687 /* Do nothing now. */;
13688 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13689 begin_destructor_body ();
13694 /* Do the processing for the end of a function body. Currently, this means
13695 closing out the cleanups for fully-constructed bases and members, and in
13696 the case of the destructor, deleting the object if desired. Again, this
13697 is only meaningful for [cd]tors, since they are the only functions where
13698 there is a significant distinction between the main body and any
13699 function catch clauses. Handling, say, main() return semantics here
13700 would be wrong, as flowing off the end of a function catch clause for
13701 main() would also need to return 0. */
13704 finish_function_body (tree compstmt
)
13706 if (compstmt
== NULL_TREE
)
13709 /* Close the block. */
13710 finish_compound_stmt (compstmt
);
13712 if (processing_template_decl
)
13713 /* Do nothing now. */;
13714 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13715 finish_constructor_body ();
13716 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13717 finish_destructor_body ();
13720 /* Given a function, returns the BLOCK corresponding to the outermost level
13721 of curly braces, skipping the artificial block created for constructor
13725 outer_curly_brace_block (tree fndecl
)
13727 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13728 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13729 /* Skip the artificial function body block. */
13730 block
= BLOCK_SUBBLOCKS (block
);
13734 /* If FNDECL is a class's key method, add the class to the list of
13735 keyed classes that should be emitted. */
13738 record_key_method_defined (tree fndecl
)
13740 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13741 && DECL_VIRTUAL_P (fndecl
)
13742 && !processing_template_decl
)
13744 tree fnclass
= DECL_CONTEXT (fndecl
);
13745 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13746 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13750 /* Subroutine of finish_function.
13751 Save the body of constexpr functions for possible
13752 future compile time evaluation. */
13755 maybe_save_function_definition (tree fun
)
13757 if (!processing_template_decl
13758 && DECL_DECLARED_CONSTEXPR_P (fun
)
13759 && !DECL_CLONED_FUNCTION_P (fun
))
13760 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13763 /* Finish up a function declaration and compile that function
13764 all the way to assembler language output. The free the storage
13765 for the function definition.
13767 FLAGS is a bitwise or of the following values:
13769 We just finished processing the body of an in-class inline
13770 function definition. (This processing will have taken place
13771 after the class definition is complete.) */
13774 finish_function (int flags
)
13776 tree fndecl
= current_function_decl
;
13777 tree fntype
, ctype
= NULL_TREE
;
13778 int inclass_inline
= (flags
& 2) != 0;
13780 /* When we get some parse errors, we can end up without a
13781 current_function_decl, so cope. */
13782 if (fndecl
== NULL_TREE
)
13783 return error_mark_node
;
13785 if (c_dialect_objc ())
13786 objc_finish_function ();
13788 gcc_assert (!defer_mark_used_calls
);
13789 defer_mark_used_calls
= true;
13791 record_key_method_defined (fndecl
);
13793 fntype
= TREE_TYPE (fndecl
);
13795 /* TREE_READONLY (fndecl) = 1;
13796 This caused &foo to be of type ptr-to-const-function
13797 which then got a warning when stored in a ptr-to-function variable. */
13799 gcc_assert (building_stmt_list_p ());
13800 /* The current function is being defined, so its DECL_INITIAL should
13801 be set, and unless there's a multiple definition, it should be
13802 error_mark_node. */
13803 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13805 /* For a cloned function, we've already got all the code we need;
13806 there's no need to add any extra bits. */
13807 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13809 /* Make it so that `main' always returns 0 by default. */
13810 if (DECL_MAIN_P (current_function_decl
))
13811 finish_return_stmt (integer_zero_node
);
13813 if (use_eh_spec_block (current_function_decl
))
13814 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13815 (TREE_TYPE (current_function_decl
)),
13816 current_eh_spec_block
);
13819 /* If we're saving up tree structure, tie off the function now. */
13820 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13822 finish_fname_decls ();
13824 /* If this function can't throw any exceptions, remember that. */
13825 if (!processing_template_decl
13826 && !cp_function_chain
->can_throw
13827 && !flag_non_call_exceptions
13828 && !decl_replaceable_p (fndecl
))
13829 TREE_NOTHROW (fndecl
) = 1;
13831 /* This must come after expand_function_end because cleanups might
13832 have declarations (from inline functions) that need to go into
13833 this function's blocks. */
13835 /* If the current binding level isn't the outermost binding level
13836 for this function, either there is a bug, or we have experienced
13837 syntax errors and the statement tree is malformed. */
13838 if (current_binding_level
->kind
!= sk_function_parms
)
13840 /* Make sure we have already experienced errors. */
13841 gcc_assert (errorcount
);
13843 /* Throw away the broken statement tree and extra binding
13845 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13847 while (current_binding_level
->kind
!= sk_function_parms
)
13849 if (current_binding_level
->kind
== sk_class
)
13850 pop_nested_class ();
13852 poplevel (0, 0, 0);
13855 poplevel (1, 0, 1);
13857 /* Statements should always be full-expressions at the outermost set
13858 of curly braces for a function. */
13859 gcc_assert (stmts_are_full_exprs_p ());
13861 /* If there are no return statements in a function with auto return type,
13862 the return type is void. But if the declared type is something like
13863 auto*, this is an error. */
13864 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13865 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13867 if (!is_auto (current_function_auto_return_pattern
)
13868 && !current_function_returns_value
&& !current_function_returns_null
)
13870 error ("no return statements in function returning %qT",
13871 current_function_auto_return_pattern
);
13872 inform (input_location
, "only plain %<auto%> return type can be "
13873 "deduced to %<void%>");
13875 apply_deduced_return_type (fndecl
, void_type_node
);
13876 fntype
= TREE_TYPE (fndecl
);
13879 /* Save constexpr function body before it gets munged by
13880 the NRV transformation. */
13881 maybe_save_function_definition (fndecl
);
13883 /* Set up the named return value optimization, if we can. Candidate
13884 variables are selected in check_return_expr. */
13885 if (current_function_return_value
)
13887 tree r
= current_function_return_value
;
13890 if (r
!= error_mark_node
13891 /* This is only worth doing for fns that return in memory--and
13892 simpler, since we don't have to worry about promoted modes. */
13893 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13894 /* Only allow this for variables declared in the outer scope of
13895 the function so we know that their lifetime always ends with a
13896 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13897 we were to do this optimization in tree-ssa. */
13898 && (outer
= outer_curly_brace_block (fndecl
))
13899 && chain_member (r
, BLOCK_VARS (outer
)))
13900 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13902 current_function_return_value
= NULL_TREE
;
13905 /* Remember that we were in class scope. */
13906 if (current_class_name
)
13907 ctype
= current_class_type
;
13909 /* Must mark the RESULT_DECL as being in this function. */
13910 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13912 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13913 to the FUNCTION_DECL node itself. */
13914 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13916 /* Save away current state, if appropriate. */
13917 if (!processing_template_decl
)
13918 save_function_data (fndecl
);
13920 /* Complain if there's just no return statement. */
13921 if (warn_return_type
13922 && !VOID_TYPE_P (TREE_TYPE (fntype
))
13923 && !dependent_type_p (TREE_TYPE (fntype
))
13924 && !current_function_returns_value
&& !current_function_returns_null
13925 /* Don't complain if we abort or throw. */
13926 && !current_function_returns_abnormally
13927 /* Don't complain if we are declared noreturn. */
13928 && !TREE_THIS_VOLATILE (fndecl
)
13929 && !DECL_NAME (DECL_RESULT (fndecl
))
13930 && !TREE_NO_WARNING (fndecl
)
13931 /* Structor return values (if any) are set by the compiler. */
13932 && !DECL_CONSTRUCTOR_P (fndecl
)
13933 && !DECL_DESTRUCTOR_P (fndecl
)
13934 && targetm
.warn_func_return (fndecl
))
13936 warning (OPT_Wreturn_type
,
13937 "no return statement in function returning non-void");
13938 TREE_NO_WARNING (fndecl
) = 1;
13941 /* Store the end of the function, so that we get good line number
13942 info for the epilogue. */
13943 cfun
->function_end_locus
= input_location
;
13945 /* Complain about parameters that are only set, but never otherwise used. */
13946 if (warn_unused_but_set_parameter
13947 && !processing_template_decl
13948 && errorcount
== unused_but_set_errorcount
13949 && !DECL_CLONED_FUNCTION_P (fndecl
))
13953 for (decl
= DECL_ARGUMENTS (fndecl
);
13955 decl
= DECL_CHAIN (decl
))
13956 if (TREE_USED (decl
)
13957 && TREE_CODE (decl
) == PARM_DECL
13958 && !DECL_READ_P (decl
)
13959 && DECL_NAME (decl
)
13960 && !DECL_ARTIFICIAL (decl
)
13961 && !TREE_NO_WARNING (decl
)
13962 && !DECL_IN_SYSTEM_HEADER (decl
)
13963 && TREE_TYPE (decl
) != error_mark_node
13964 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13965 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13966 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13967 warning (OPT_Wunused_but_set_parameter
,
13968 "parameter %q+D set but not used", decl
);
13969 unused_but_set_errorcount
= errorcount
;
13972 /* Complain about locally defined typedefs that are not used in this
13974 maybe_warn_unused_local_typedefs ();
13976 /* Genericize before inlining. */
13977 if (!processing_template_decl
)
13979 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13980 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13981 cp_genericize (fndecl
);
13982 /* Clear out the bits we don't need. */
13983 f
->x_current_class_ptr
= NULL
;
13984 f
->x_current_class_ref
= NULL
;
13985 f
->x_eh_spec_block
= NULL
;
13986 f
->x_in_charge_parm
= NULL
;
13987 f
->x_vtt_parm
= NULL
;
13988 f
->x_return_value
= NULL
;
13989 f
->bindings
= NULL
;
13990 f
->extern_decl_map
= NULL
;
13992 /* Clear out the bits we don't need. */
13993 local_names
= NULL
;
13995 /* We're leaving the context of this function, so zap cfun. It's still in
13996 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13998 current_function_decl
= NULL
;
14000 /* If this is an in-class inline definition, we may have to pop the
14001 bindings for the template parameters that we added in
14002 maybe_begin_member_template_processing when start_function was
14004 if (inclass_inline
)
14005 maybe_end_member_template_processing ();
14007 /* Leave the scope of the class. */
14009 pop_nested_class ();
14014 current_function_decl
= NULL_TREE
;
14016 defer_mark_used_calls
= false;
14017 if (deferred_mark_used_calls
)
14022 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14024 vec_free (deferred_mark_used_calls
);
14030 /* Create the FUNCTION_DECL for a function definition.
14031 DECLSPECS and DECLARATOR are the parts of the declaration;
14032 they describe the return type and the name of the function,
14033 but twisted together in a fashion that parallels the syntax of C.
14035 This function creates a binding context for the function body
14036 as well as setting up the FUNCTION_DECL in current_function_decl.
14038 Returns a FUNCTION_DECL on success.
14040 If the DECLARATOR is not suitable for a function (it defines a datum
14041 instead), we return 0, which tells yyparse to report a parse error.
14043 May return void_type_node indicating that this method is actually
14044 a friend. See grokfield for more details.
14046 Came here with a `.pushlevel' .
14048 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14049 CHANGES TO CODE IN `grokfield'. */
14052 grokmethod (cp_decl_specifier_seq
*declspecs
,
14053 const cp_declarator
*declarator
, tree attrlist
)
14055 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14058 if (fndecl
== error_mark_node
)
14059 return error_mark_node
;
14061 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14063 error ("invalid member function declaration");
14064 return error_mark_node
;
14068 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14070 /* Pass friends other than inline friend functions back. */
14071 if (fndecl
== void_type_node
)
14074 if (DECL_IN_AGGR_P (fndecl
))
14076 if (DECL_CLASS_SCOPE_P (fndecl
))
14077 error ("%qD is already defined in class %qT", fndecl
,
14078 DECL_CONTEXT (fndecl
));
14079 return error_mark_node
;
14082 check_template_shadow (fndecl
);
14084 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14085 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14087 /* We process method specializations in finish_struct_1. */
14088 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14090 fndecl
= push_template_decl (fndecl
);
14091 if (fndecl
== error_mark_node
)
14095 if (! DECL_FRIEND_P (fndecl
))
14097 if (DECL_CHAIN (fndecl
))
14099 fndecl
= copy_node (fndecl
);
14100 TREE_CHAIN (fndecl
) = NULL_TREE
;
14104 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14106 DECL_IN_AGGR_P (fndecl
) = 1;
14111 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14112 we can lay it out later, when and if its type becomes complete.
14114 Also handle constexpr pointer to member variables where the initializer
14115 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14118 maybe_register_incomplete_var (tree var
)
14120 gcc_assert (VAR_P (var
));
14122 /* Keep track of variables with incomplete types. */
14123 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14124 && DECL_EXTERNAL (var
))
14126 tree inner_type
= TREE_TYPE (var
);
14128 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14129 inner_type
= TREE_TYPE (inner_type
);
14130 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14132 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14133 /* RTTI TD entries are created while defining the type_info. */
14134 || (TYPE_LANG_SPECIFIC (inner_type
)
14135 && TYPE_BEING_DEFINED (inner_type
)))
14137 incomplete_var iv
= {var
, inner_type
};
14138 vec_safe_push (incomplete_vars
, iv
);
14140 else if (TYPE_PTRMEM_P (inner_type
)
14141 && DECL_INITIAL (var
)
14142 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14144 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14145 gcc_assert (TYPE_BEING_DEFINED (context
));
14146 incomplete_var iv
= {var
, context
};
14147 vec_safe_push (incomplete_vars
, iv
);
14152 /* Called when a class type (given by TYPE) is defined. If there are
14153 any existing VAR_DECLs whose type has been completed by this
14154 declaration, update them now. */
14157 complete_vars (tree type
)
14160 incomplete_var
*iv
;
14162 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14164 if (same_type_p (type
, iv
->incomplete_type
))
14166 tree var
= iv
->decl
;
14167 tree type
= TREE_TYPE (var
);
14169 if (TYPE_PTRMEM_P (type
))
14170 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14173 /* Complete the type of the variable. The VAR_DECL itself
14174 will be laid out in expand_expr. */
14175 complete_type (type
);
14176 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14179 /* Remove this entry from the list. */
14180 incomplete_vars
->unordered_remove (ix
);
14186 /* Check for pending declarations which may have abstract type. */
14187 complete_type_check_abstract (type
);
14190 /* If DECL is of a type which needs a cleanup, build and return an
14191 expression to perform that cleanup here. Return NULL_TREE if no
14192 cleanup need be done. */
14195 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14201 /* Assume no cleanup is required. */
14202 cleanup
= NULL_TREE
;
14204 if (error_operand_p (decl
))
14207 /* Handle "__attribute__((cleanup))". We run the cleanup function
14208 before the destructor since the destructor is what actually
14209 terminates the lifetime of the object. */
14210 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14217 /* Get the name specified by the user for the cleanup function. */
14218 id
= TREE_VALUE (TREE_VALUE (attr
));
14219 /* Look up the name to find the cleanup function to call. It is
14220 important to use lookup_name here because that is what is
14221 used in c-common.c:handle_cleanup_attribute when performing
14222 initial checks on the attribute. Note that those checks
14223 include ensuring that the function found is not an overloaded
14224 function, or an object with an overloaded call operator,
14225 etc.; we can rely on the fact that the function found is an
14226 ordinary FUNCTION_DECL. */
14227 fn
= lookup_name (id
);
14228 arg
= build_address (decl
);
14230 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14231 if (cleanup
== error_mark_node
)
14232 return error_mark_node
;
14234 /* Handle ordinary C++ destructors. */
14235 type
= TREE_TYPE (decl
);
14236 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14238 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14239 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14240 && CLASSTYPE_VBASECLASSES (type
));
14244 if (TREE_CODE (type
) == ARRAY_TYPE
)
14247 addr
= build_address (decl
);
14249 /* Optimize for space over speed here. */
14250 if (!has_vbases
|| flag_expensive_optimizations
)
14251 flags
|= LOOKUP_NONVIRTUAL
;
14253 call
= build_delete (TREE_TYPE (addr
), addr
,
14254 sfk_complete_destructor
, flags
, 0, complain
);
14255 if (call
== error_mark_node
)
14256 cleanup
= error_mark_node
;
14258 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14263 /* build_delete sets the location of the destructor call to the
14264 current location, even though the destructor is going to be
14265 called later, at the end of the current scope. This can lead to
14266 a "jumpy" behaviour for users of debuggers when they step around
14267 the end of the block. So let's unset the location of the
14268 destructor call instead. */
14269 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14270 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14275 /* When a stmt has been parsed, this function is called. */
14282 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14283 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14284 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14287 static_fn_type (tree memfntype
)
14292 if (TYPE_PTRMEMFUNC_P (memfntype
))
14293 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14294 if (POINTER_TYPE_P (memfntype
)
14295 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14296 memfntype
= TREE_TYPE (memfntype
);
14297 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14299 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14300 args
= TYPE_ARG_TYPES (memfntype
);
14301 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14302 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14303 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14304 fntype
= (cp_build_type_attribute_variant
14305 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14306 fntype
= (build_exception_variant
14307 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14311 /* DECL was originally constructed as a non-static member function,
14312 but turned out to be static. Update it accordingly. */
14315 revert_static_member_fn (tree decl
)
14317 tree stype
= static_fn_type (decl
);
14318 cp_cv_quals quals
= type_memfn_quals (stype
);
14319 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14321 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14322 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14324 TREE_TYPE (decl
) = stype
;
14326 if (DECL_ARGUMENTS (decl
))
14327 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14328 DECL_STATIC_FUNCTION_P (decl
) = 1;
14331 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14332 one of the language-independent trees. */
14334 enum cp_tree_node_structure_enum
14335 cp_tree_node_structure (union lang_tree_node
* t
)
14337 switch (TREE_CODE (&t
->generic
))
14339 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14340 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14341 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14342 case OVERLOAD
: return TS_CP_OVERLOAD
;
14343 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14344 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14345 case BASELINK
: return TS_CP_BASELINK
;
14346 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14347 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14348 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14349 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14350 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14351 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14352 default: return TS_CP_GENERIC
;
14356 /* Build the void_list_node (void_type_node having been created). */
14358 build_void_list_node (void)
14360 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14365 cp_missing_noreturn_ok_p (tree decl
)
14367 /* A missing noreturn is ok for the `main' function. */
14368 return DECL_MAIN_P (decl
);
14371 /* Return the COMDAT group into which DECL should be placed. */
14374 cxx_comdat_group (tree decl
)
14378 /* Virtual tables, construction virtual tables, and virtual table
14379 tables all go in a single COMDAT group, named after the primary
14381 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14382 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14383 /* For all other DECLs, the COMDAT group is the mangled name of the
14384 declaration itself. */
14387 while (DECL_THUNK_P (decl
))
14389 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14390 into the same section as the target function. In that case
14391 we must return target's name. */
14392 tree target
= THUNK_TARGET (decl
);
14393 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14394 && DECL_SECTION_NAME (target
) != NULL
14395 && DECL_ONE_ONLY (target
))
14400 name
= DECL_ASSEMBLER_NAME (decl
);
14406 /* Returns the return type for FN as written by the user, which may include
14407 a placeholder for a deduced return type. */
14410 fndecl_declared_return_type (tree fn
)
14412 fn
= STRIP_TEMPLATE (fn
);
14413 if (FNDECL_USED_AUTO (fn
))
14414 return (DECL_STRUCT_FUNCTION (fn
)->language
14415 ->x_auto_return_pattern
);
14417 return TREE_TYPE (TREE_TYPE (fn
));
14420 /* Returns true iff DECL was declared with an auto return type and it has
14421 not yet been deduced to a real type. */
14424 undeduced_auto_decl (tree decl
)
14426 if (cxx_dialect
< cxx1y
)
14428 return type_uses_auto (TREE_TYPE (decl
));
14431 /* Complain if DECL has an undeduced return type. */
14434 require_deduced_type (tree decl
)
14436 if (undeduced_auto_decl (decl
))
14437 error ("use of %qD before deduction of %<auto%>", decl
);
14440 #include "gt-cp-decl.h"