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
;
625 if (TREE_CODE (decl
) == VAR_DECL
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
&& TREE_CODE (link
) == VAR_DECL
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 if (FNDECL_USED_AUTO (olddecl
))
996 r2
= DECL_STRUCT_FUNCTION (olddecl
)->language
->x_auto_return_pattern
;
1000 if (same_type_p (TREE_TYPE (f1
), r2
))
1002 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1003 && (DECL_BUILT_IN (olddecl
)
1004 #ifndef NO_IMPLICIT_EXTERN_C
1005 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1006 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1010 types_match
= self_promoting_args_p (p1
);
1011 if (p1
== void_list_node
)
1012 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1014 #ifndef NO_IMPLICIT_EXTERN_C
1015 else if (!prototype_p (f1
)
1016 && (DECL_EXTERN_C_P (olddecl
)
1017 && DECL_IN_SYSTEM_HEADER (olddecl
)
1018 && !DECL_CLASS_SCOPE_P (olddecl
))
1019 && (DECL_EXTERN_C_P (newdecl
)
1020 && DECL_IN_SYSTEM_HEADER (newdecl
)
1021 && !DECL_CLASS_SCOPE_P (newdecl
)))
1023 types_match
= self_promoting_args_p (p2
);
1024 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1030 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1031 || comp_type_attributes (TREE_TYPE (newdecl
),
1032 TREE_TYPE (olddecl
)) != 0);
1037 /* The decls dont match if they correspond to two different versions
1038 of the same function. Disallow extern "C" functions to be
1039 versions for now. */
1041 && !DECL_EXTERN_C_P (newdecl
)
1042 && !DECL_EXTERN_C_P (olddecl
)
1043 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1045 /* Mark functions as versions if necessary. Modify the mangled decl
1046 name if necessary. */
1047 if (DECL_FUNCTION_VERSIONED (newdecl
)
1048 && DECL_FUNCTION_VERSIONED (olddecl
))
1050 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1052 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1053 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1054 mangle_decl (newdecl
);
1056 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1058 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1059 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1060 mangle_decl (olddecl
);
1062 record_function_versions (olddecl
, newdecl
);
1066 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1068 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1069 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1072 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1073 DECL_TEMPLATE_PARMS (olddecl
)))
1076 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1077 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1078 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1080 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1081 DECL_TEMPLATE_RESULT (newdecl
));
1085 /* Need to check scope for variable declaration (VAR_DECL).
1086 For typedef (TYPE_DECL), scope is ignored. */
1087 if (TREE_CODE (newdecl
) == VAR_DECL
1088 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1090 Two declarations for an object with C language linkage
1091 with the same name (ignoring the namespace that qualify
1092 it) that appear in different namespace scopes refer to
1094 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1097 if (TREE_TYPE (newdecl
) == error_mark_node
)
1098 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1099 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1100 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1101 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1104 types_match
= comptypes (TREE_TYPE (newdecl
),
1105 TREE_TYPE (olddecl
),
1106 COMPARE_REDECLARATION
);
1112 /* If NEWDECL is `static' and an `extern' was seen previously,
1113 warn about it. OLDDECL is the previous declaration.
1115 Note that this does not apply to the C++ case of declaring
1116 a variable `extern const' and then later `const'.
1118 Don't complain about built-in functions, since they are beyond
1119 the user's control. */
1122 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1124 if (TREE_CODE (newdecl
) == TYPE_DECL
1125 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1126 || TREE_CODE (newdecl
) == CONST_DECL
1127 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1130 /* Don't get confused by static member functions; that's a different
1132 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1133 && DECL_STATIC_FUNCTION_P (newdecl
))
1136 /* If the old declaration was `static', or the new one isn't, then
1137 everything is OK. */
1138 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1141 /* It's OK to declare a builtin function as `static'. */
1142 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1143 && DECL_ARTIFICIAL (olddecl
))
1146 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1147 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1150 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1151 function templates. If their exception specifications do not
1152 match, issue a diagnostic. */
1155 check_redeclaration_exception_specification (tree new_decl
,
1160 tree new_exceptions
;
1161 tree old_exceptions
;
1163 new_type
= TREE_TYPE (new_decl
);
1164 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1165 old_type
= TREE_TYPE (old_decl
);
1166 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1170 If any declaration of a function has an exception-specification,
1171 all declarations, including the definition and an explicit
1172 specialization, of that function shall have an
1173 exception-specification with the same set of type-ids. */
1174 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1175 && ! DECL_IS_BUILTIN (old_decl
)
1177 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1179 error ("declaration of %qF has a different exception specifier",
1181 error ("from previous declaration %q+F", old_decl
);
1185 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1186 Otherwise issue diagnostics. */
1189 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1191 old_decl
= STRIP_TEMPLATE (old_decl
);
1192 new_decl
= STRIP_TEMPLATE (new_decl
);
1193 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1194 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1196 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1197 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1199 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1201 /* Hide a built-in declaration. */
1202 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1203 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1206 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1207 error ("from previous declaration %q+D", old_decl
);
1211 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1212 && lookup_attribute ("gnu_inline", \
1213 DECL_ATTRIBUTES (fn)))
1215 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1216 If the redeclaration is invalid, a diagnostic is issued, and the
1217 error_mark_node is returned. Otherwise, OLDDECL is returned.
1219 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1222 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1225 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1227 unsigned olddecl_uid
= DECL_UID (olddecl
);
1228 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1229 int new_defines_function
= 0;
1230 tree new_template_info
;
1232 if (newdecl
== olddecl
)
1235 types_match
= decls_match (newdecl
, olddecl
);
1237 /* If either the type of the new decl or the type of the old decl is an
1238 error_mark_node, then that implies that we have already issued an
1239 error (earlier) for some bogus type specification, and in that case,
1240 it is rather pointless to harass the user with yet more error message
1241 about the same declaration, so just pretend the types match here. */
1242 if (TREE_TYPE (newdecl
) == error_mark_node
1243 || TREE_TYPE (olddecl
) == error_mark_node
)
1244 return error_mark_node
;
1246 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1247 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1249 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1250 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1251 && check_raw_literal_operator (olddecl
))
1252 error ("literal operator template %q+D conflicts with"
1253 " raw literal operator %qD", newdecl
, olddecl
);
1254 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1255 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1256 && check_raw_literal_operator (newdecl
))
1257 error ("raw literal operator %q+D conflicts with"
1258 " literal operator template %qD", newdecl
, olddecl
);
1261 if (DECL_P (olddecl
)
1262 && TREE_CODE (newdecl
) == FUNCTION_DECL
1263 && TREE_CODE (olddecl
) == FUNCTION_DECL
1264 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1266 if (DECL_DECLARED_INLINE_P (newdecl
)
1267 && DECL_UNINLINABLE (newdecl
)
1268 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1269 /* Already warned elsewhere. */;
1270 else if (DECL_DECLARED_INLINE_P (olddecl
)
1271 && DECL_UNINLINABLE (olddecl
)
1272 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1273 /* Already warned. */;
1274 else if (DECL_DECLARED_INLINE_P (newdecl
)
1275 && DECL_UNINLINABLE (olddecl
)
1276 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1278 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1280 warning (OPT_Wattributes
, "previous declaration of %q+D "
1281 "with attribute noinline", olddecl
);
1283 else if (DECL_DECLARED_INLINE_P (olddecl
)
1284 && DECL_UNINLINABLE (newdecl
)
1285 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1287 warning (OPT_Wattributes
, "function %q+D redeclared with "
1288 "attribute noinline", newdecl
);
1289 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1294 /* Check for redeclaration and other discrepancies. */
1295 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1296 && DECL_ARTIFICIAL (olddecl
))
1298 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1299 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1301 /* Avoid warnings redeclaring built-ins which have not been
1302 explicitly declared. */
1303 if (DECL_ANTICIPATED (olddecl
))
1306 /* If you declare a built-in or predefined function name as static,
1307 the old definition is overridden, but optionally warn this was a
1308 bad choice of name. */
1309 if (! TREE_PUBLIC (newdecl
))
1311 warning (OPT_Wshadow
,
1312 DECL_BUILT_IN (olddecl
)
1313 ? G_("shadowing built-in function %q#D")
1314 : G_("shadowing library function %q#D"), olddecl
);
1315 /* Discard the old built-in function. */
1318 /* If the built-in is not ansi, then programs can override
1319 it even globally without an error. */
1320 else if (! DECL_BUILT_IN (olddecl
))
1321 warning (0, "library function %q#D redeclared as non-function %q#D",
1325 error ("declaration of %q#D", newdecl
);
1326 error ("conflicts with built-in declaration %q#D",
1331 else if (!types_match
)
1333 /* Avoid warnings redeclaring built-ins which have not been
1334 explicitly declared. */
1335 if (DECL_ANTICIPATED (olddecl
))
1337 /* Deal with fileptr_type_node. FILE type is not known
1338 at the time we create the builtins. */
1341 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1342 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1344 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1347 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1349 tree t
= TREE_VALUE (t1
);
1351 if (TREE_CODE (t
) == POINTER_TYPE
1352 && TYPE_NAME (TREE_TYPE (t
))
1353 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1354 == get_identifier ("FILE")
1355 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1357 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1359 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1360 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1361 types_match
= decls_match (newdecl
, olddecl
);
1363 return duplicate_decls (newdecl
, olddecl
,
1365 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1368 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1371 else if ((DECL_EXTERN_C_P (newdecl
)
1372 && DECL_EXTERN_C_P (olddecl
))
1373 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1374 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1376 /* A near match; override the builtin. */
1378 if (TREE_PUBLIC (newdecl
))
1380 warning (0, "new declaration %q#D", newdecl
);
1381 warning (0, "ambiguates built-in declaration %q#D",
1385 warning (OPT_Wshadow
,
1386 DECL_BUILT_IN (olddecl
)
1387 ? G_("shadowing built-in function %q#D")
1388 : G_("shadowing library function %q#D"), olddecl
);
1391 /* Discard the old built-in function. */
1394 /* Replace the old RTL to avoid problems with inlining. */
1395 COPY_DECL_RTL (newdecl
, olddecl
);
1397 /* Even if the types match, prefer the new declarations type for
1398 built-ins which have not been explicitly declared, for
1399 exception lists, etc... */
1400 else if (DECL_IS_BUILTIN (olddecl
))
1402 tree type
= TREE_TYPE (newdecl
);
1403 tree attribs
= (*targetm
.merge_type_attributes
)
1404 (TREE_TYPE (olddecl
), type
);
1406 type
= cp_build_type_attribute_variant (type
, attribs
);
1407 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1410 /* If a function is explicitly declared "throw ()", propagate that to
1411 the corresponding builtin. */
1412 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1413 && DECL_ANTICIPATED (olddecl
)
1414 && TREE_NOTHROW (newdecl
)
1415 && !TREE_NOTHROW (olddecl
))
1417 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1418 tree tmpdecl
= builtin_decl_explicit (fncode
);
1419 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1420 TREE_NOTHROW (tmpdecl
) = 1;
1423 /* Whether or not the builtin can throw exceptions has no
1424 bearing on this declarator. */
1425 TREE_NOTHROW (olddecl
) = 0;
1427 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1429 /* If a builtin function is redeclared as `static', merge
1430 the declarations, but make the original one static. */
1431 DECL_THIS_STATIC (olddecl
) = 1;
1432 TREE_PUBLIC (olddecl
) = 0;
1434 /* Make the old declaration consistent with the new one so
1435 that all remnants of the builtin-ness of this function
1436 will be banished. */
1437 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1438 COPY_DECL_RTL (newdecl
, olddecl
);
1441 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1443 /* C++ Standard, 3.3, clause 4:
1444 "[Note: a namespace name or a class template name must be unique
1445 in its declarative region (7.3.2, clause 14). ]" */
1446 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1447 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1448 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1449 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1450 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1451 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1453 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1454 && TREE_CODE (newdecl
) != TYPE_DECL
)
1455 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1456 && TREE_CODE (olddecl
) != TYPE_DECL
))
1458 /* We do nothing special here, because C++ does such nasty
1459 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1460 get shadowed, and know that if we need to find a TYPE_DECL
1461 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1462 slot of the identifier. */
1466 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1467 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1468 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1469 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1473 error ("%q#D redeclared as different kind of symbol", newdecl
);
1474 if (TREE_CODE (olddecl
) == TREE_LIST
)
1475 olddecl
= TREE_VALUE (olddecl
);
1476 error ("previous declaration of %q+#D", olddecl
);
1478 return error_mark_node
;
1480 else if (!types_match
)
1482 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1483 /* These are certainly not duplicate declarations; they're
1484 from different scopes. */
1487 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1489 /* The name of a class template may not be declared to refer to
1490 any other template, class, function, object, namespace, value,
1491 or type in the same scope. */
1492 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1493 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1495 error ("declaration of template %q#D", newdecl
);
1496 error ("conflicts with previous declaration %q+#D", olddecl
);
1497 return error_mark_node
;
1499 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1500 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1501 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1502 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1503 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1504 DECL_TEMPLATE_PARMS (olddecl
))
1505 /* Template functions can be disambiguated by
1507 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1508 TREE_TYPE (TREE_TYPE (olddecl
))))
1510 error ("new declaration %q#D", newdecl
);
1511 error ("ambiguates old declaration %q+#D", olddecl
);
1515 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1517 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1519 error ("declaration of C function %q#D conflicts with",
1521 error ("previous declaration %q+#D here", olddecl
);
1524 /* For function versions, params and types match, but they
1525 are not ambiguous. */
1526 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1527 && !DECL_FUNCTION_VERSIONED (olddecl
))
1528 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1529 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1531 error ("new declaration %q#D", newdecl
);
1532 if (FNDECL_USED_AUTO (olddecl
))
1533 error_at (DECL_SOURCE_LOCATION (olddecl
), "ambiguates old "
1534 "declaration with deduced return type");
1536 error ("ambiguates old declaration %q+#D", olddecl
);
1537 return error_mark_node
;
1544 error ("conflicting declaration %q#D", newdecl
);
1545 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1546 return error_mark_node
;
1549 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1550 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1551 && (!DECL_TEMPLATE_INFO (newdecl
)
1552 || (DECL_TI_TEMPLATE (newdecl
)
1553 != DECL_TI_TEMPLATE (olddecl
))))
1554 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1555 && (!DECL_TEMPLATE_INFO (olddecl
)
1556 || (DECL_TI_TEMPLATE (olddecl
)
1557 != DECL_TI_TEMPLATE (newdecl
))))))
1558 /* It's OK to have a template specialization and a non-template
1559 with the same type, or to have specializations of two
1560 different templates with the same type. Note that if one is a
1561 specialization, and the other is an instantiation of the same
1562 template, that we do not exit at this point. That situation
1563 can occur if we instantiate a template class, and then
1564 specialize one of its methods. This situation is valid, but
1565 the declarations must be merged in the usual way. */
1567 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1568 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1569 && !DECL_USE_TEMPLATE (newdecl
))
1570 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1571 && !DECL_USE_TEMPLATE (olddecl
))))
1572 /* One of the declarations is a template instantiation, and the
1573 other is not a template at all. That's OK. */
1575 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1577 /* In [namespace.alias] we have:
1579 In a declarative region, a namespace-alias-definition can be
1580 used to redefine a namespace-alias declared in that declarative
1581 region to refer only to the namespace to which it already
1584 Therefore, if we encounter a second alias directive for the same
1585 alias, we can just ignore the second directive. */
1586 if (DECL_NAMESPACE_ALIAS (newdecl
)
1587 && (DECL_NAMESPACE_ALIAS (newdecl
)
1588 == DECL_NAMESPACE_ALIAS (olddecl
)))
1590 /* [namespace.alias]
1592 A namespace-name or namespace-alias shall not be declared as
1593 the name of any other entity in the same declarative region.
1594 A namespace-name defined at global scope shall not be
1595 declared as the name of any other entity in any global scope
1597 error ("declaration of namespace %qD conflicts with", newdecl
);
1598 error ("previous declaration of namespace %q+D here", olddecl
);
1599 return error_mark_node
;
1603 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1606 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1607 if (DECL_NAME (olddecl
) != NULL_TREE
)
1608 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1609 ? G_("%q+#D previously defined here")
1610 : G_("%q+#D previously declared here"), olddecl
);
1611 return error_mark_node
;
1613 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1614 && DECL_INITIAL (olddecl
) != NULL_TREE
1615 && !prototype_p (TREE_TYPE (olddecl
))
1616 && prototype_p (TREE_TYPE (newdecl
)))
1618 /* Prototype decl follows defn w/o prototype. */
1619 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1620 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1621 "follows non-prototype definition here");
1623 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1624 || TREE_CODE (olddecl
) == VAR_DECL
)
1625 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1628 If two declarations of the same function or object
1629 specify different linkage-specifications ..., the program
1630 is ill-formed.... Except for functions with C++ linkage,
1631 a function declaration without a linkage specification
1632 shall not precede the first linkage specification for
1633 that function. A function can be declared without a
1634 linkage specification after an explicit linkage
1635 specification has been seen; the linkage explicitly
1636 specified in the earlier declaration is not affected by
1637 such a function declaration.
1639 DR 563 raises the question why the restrictions on
1640 functions should not also apply to objects. Older
1641 versions of G++ silently ignore the linkage-specification
1649 which is clearly wrong. Therefore, we now treat objects
1651 if (current_lang_depth () == 0)
1653 /* There is no explicit linkage-specification, so we use
1654 the linkage from the previous declaration. */
1655 if (!DECL_LANG_SPECIFIC (newdecl
))
1656 retrofit_lang_decl (newdecl
);
1657 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1661 error ("previous declaration of %q+#D with %qL linkage",
1662 olddecl
, DECL_LANGUAGE (olddecl
));
1663 error ("conflicts with new declaration with %qL linkage",
1664 DECL_LANGUAGE (newdecl
));
1668 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1670 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1672 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1673 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1676 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1677 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1679 for (; t1
&& t1
!= void_list_node
;
1680 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1681 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1683 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1686 permerror (input_location
, "default argument given for parameter %d of %q#D",
1688 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1692 error ("default argument given for parameter %d of %q#D",
1694 error ("after previous specification in %q+#D",
1701 /* Do not merge an implicit typedef with an explicit one. In:
1705 typedef class A A __attribute__ ((foo));
1707 the attribute should apply only to the typedef. */
1708 if (TREE_CODE (olddecl
) == TYPE_DECL
1709 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1710 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1713 /* If new decl is `static' and an `extern' was seen previously,
1715 warn_extern_redeclared_static (newdecl
, olddecl
);
1717 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1718 return error_mark_node
;
1720 /* We have committed to returning 1 at this point. */
1721 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1723 /* Now that functions must hold information normally held
1724 by field decls, there is extra work to do so that
1725 declaration information does not get destroyed during
1727 if (DECL_VINDEX (olddecl
))
1728 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1729 if (DECL_CONTEXT (olddecl
))
1730 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1731 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1732 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1733 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1734 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1735 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1736 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1737 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1738 SET_OVERLOADED_OPERATOR_CODE
1739 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1740 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1742 /* Optionally warn about more than one declaration for the same
1743 name, but don't warn about a function declaration followed by a
1745 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1746 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1747 /* Don't warn about extern decl followed by definition. */
1748 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1749 /* Don't warn about friends, let add_friend take care of it. */
1750 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1751 /* Don't warn about declaration followed by specialization. */
1752 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1753 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1755 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1756 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1759 if (DECL_DELETED_FN (newdecl
))
1761 error ("deleted definition of %qD", newdecl
);
1762 error ("after previous declaration %q+D", olddecl
);
1764 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1767 /* Deal with C++: must preserve virtual function table size. */
1768 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1770 tree newtype
= TREE_TYPE (newdecl
);
1771 tree oldtype
= TREE_TYPE (olddecl
);
1773 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1774 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1775 CLASSTYPE_FRIEND_CLASSES (newtype
)
1776 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1778 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1781 /* Copy all the DECL_... slots specified in the new decl
1782 except for any that we copy here from the old type. */
1783 DECL_ATTRIBUTES (newdecl
)
1784 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1786 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1790 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1791 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1792 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1793 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1794 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1795 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1797 DECL_ATTRIBUTES (old_result
)
1798 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1800 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1802 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1803 && DECL_INITIAL (new_result
))
1805 if (DECL_INITIAL (old_result
))
1806 DECL_UNINLINABLE (old_result
) = 1;
1808 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1809 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1810 DECL_NOT_REALLY_EXTERN (old_result
)
1811 = DECL_NOT_REALLY_EXTERN (new_result
);
1812 DECL_INTERFACE_KNOWN (old_result
)
1813 = DECL_INTERFACE_KNOWN (new_result
);
1814 DECL_DECLARED_INLINE_P (old_result
)
1815 = DECL_DECLARED_INLINE_P (new_result
);
1816 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1817 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1822 DECL_DECLARED_INLINE_P (old_result
)
1823 |= DECL_DECLARED_INLINE_P (new_result
);
1824 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1825 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1826 check_redeclaration_exception_specification (newdecl
, olddecl
);
1830 /* If the new declaration is a definition, update the file and
1831 line information on the declaration, and also make
1832 the old declaration the same definition. */
1833 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1835 DECL_SOURCE_LOCATION (olddecl
)
1836 = DECL_SOURCE_LOCATION (old_result
)
1837 = DECL_SOURCE_LOCATION (newdecl
);
1838 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1839 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1842 DECL_ARGUMENTS (old_result
)
1843 = DECL_ARGUMENTS (new_result
);
1844 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1845 parm
= DECL_CHAIN (parm
))
1846 DECL_CONTEXT (parm
) = old_result
;
1855 /* Automatically handles default parameters. */
1856 tree oldtype
= TREE_TYPE (olddecl
);
1859 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1860 maybe_instantiate_noexcept (olddecl
);
1862 /* Merge the data types specified in the two decls. */
1863 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1865 /* If merge_types produces a non-typedef type, just use the old type. */
1866 if (TREE_CODE (newdecl
) == TYPE_DECL
1867 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1870 if (TREE_CODE (newdecl
) == VAR_DECL
)
1872 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1873 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1874 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1875 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1876 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1877 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1879 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1880 if (DECL_LANG_SPECIFIC (olddecl
)
1881 && CP_DECL_THREADPRIVATE_P (olddecl
))
1883 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1884 if (!DECL_LANG_SPECIFIC (newdecl
))
1885 retrofit_lang_decl (newdecl
);
1887 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1888 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1892 /* Do this after calling `merge_types' so that default
1893 parameters don't confuse us. */
1894 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1895 check_redeclaration_exception_specification (newdecl
, olddecl
);
1896 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1898 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1899 check_default_args (newdecl
);
1901 /* Lay the type out, unless already done. */
1902 if (! same_type_p (newtype
, oldtype
)
1903 && TREE_TYPE (newdecl
) != error_mark_node
1904 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1905 layout_type (TREE_TYPE (newdecl
));
1907 if ((TREE_CODE (newdecl
) == VAR_DECL
1908 || TREE_CODE (newdecl
) == PARM_DECL
1909 || TREE_CODE (newdecl
) == RESULT_DECL
1910 || TREE_CODE (newdecl
) == FIELD_DECL
1911 || TREE_CODE (newdecl
) == TYPE_DECL
)
1912 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1913 layout_decl (newdecl
, 0);
1915 /* Merge the type qualifiers. */
1916 if (TREE_READONLY (newdecl
))
1917 TREE_READONLY (olddecl
) = 1;
1918 if (TREE_THIS_VOLATILE (newdecl
))
1919 TREE_THIS_VOLATILE (olddecl
) = 1;
1920 if (TREE_NOTHROW (newdecl
))
1921 TREE_NOTHROW (olddecl
) = 1;
1923 /* Merge deprecatedness. */
1924 if (TREE_DEPRECATED (newdecl
))
1925 TREE_DEPRECATED (olddecl
) = 1;
1927 /* Preserve function specific target and optimization options */
1928 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1930 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1931 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1932 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1933 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1935 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1936 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1937 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1938 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1941 /* Merge the initialization information. */
1942 if (DECL_INITIAL (newdecl
) == NULL_TREE
1943 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1945 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1946 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1947 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1949 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1950 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1954 /* Merge the section attribute.
1955 We want to issue an error if the sections conflict but that must be
1956 done later in decl_attributes since we are called before attributes
1958 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1959 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1961 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1963 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1964 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1965 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1966 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1967 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1968 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1969 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1970 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1971 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1972 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1973 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1974 /* Keep the old RTL. */
1975 COPY_DECL_RTL (olddecl
, newdecl
);
1977 else if (TREE_CODE (newdecl
) == VAR_DECL
1978 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1980 /* Keep the old RTL. We cannot keep the old RTL if the old
1981 declaration was for an incomplete object and the new
1982 declaration is not since many attributes of the RTL will
1984 COPY_DECL_RTL (olddecl
, newdecl
);
1987 /* If cannot merge, then use the new type and qualifiers,
1988 and don't preserve the old rtl. */
1991 /* Clean out any memory we had of the old declaration. */
1992 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1994 TREE_VALUE (oldstatic
) = error_mark_node
;
1996 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1997 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1998 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1999 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2002 /* Merge the storage class information. */
2003 merge_weak (newdecl
, olddecl
);
2005 if (DECL_ONE_ONLY (olddecl
))
2006 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2008 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2009 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2010 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2011 if (! DECL_EXTERNAL (olddecl
))
2012 DECL_EXTERNAL (newdecl
) = 0;
2014 new_template_info
= NULL_TREE
;
2015 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2017 bool new_redefines_gnu_inline
= false;
2019 if (new_defines_function
2020 && ((DECL_INTERFACE_KNOWN (olddecl
)
2021 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2022 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2023 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2024 == FUNCTION_DECL
))))
2028 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2029 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2031 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2034 if (!new_redefines_gnu_inline
)
2036 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2037 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2038 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2040 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2041 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2042 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2044 /* If the OLDDECL is an instantiation and/or specialization,
2045 then the NEWDECL must be too. But, it may not yet be marked
2046 as such if the caller has created NEWDECL, but has not yet
2047 figured out that it is a redeclaration. */
2048 if (!DECL_USE_TEMPLATE (newdecl
))
2049 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2051 /* Don't really know how much of the language-specific
2052 values we should copy from old to new. */
2053 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2054 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2055 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2056 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2058 if (LANG_DECL_HAS_MIN (newdecl
))
2060 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2061 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2062 if (DECL_TEMPLATE_INFO (newdecl
))
2063 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2064 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2066 /* Only functions have these fields. */
2067 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2068 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
2070 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2071 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2072 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2073 && DECL_HIDDEN_FRIEND_P (olddecl
)
2074 && newdecl_is_friend
);
2075 DECL_BEFRIENDING_CLASSES (newdecl
)
2076 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2077 DECL_BEFRIENDING_CLASSES (olddecl
));
2078 /* DECL_THUNKS is only valid for virtual functions,
2079 otherwise it is a DECL_FRIEND_CONTEXT. */
2080 if (DECL_VIRTUAL_P (newdecl
))
2081 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2083 /* Only variables have this field. */
2084 else if (TREE_CODE (newdecl
) == VAR_DECL
2085 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2086 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2089 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2093 /* Merge parameter attributes. */
2094 tree oldarg
, newarg
;
2095 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2096 newarg
= DECL_ARGUMENTS(newdecl
);
2098 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2099 DECL_ATTRIBUTES (newarg
)
2100 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2101 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2104 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2105 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2107 /* If newdecl is not a specialization, then it is not a
2108 template-related function at all. And that means that we
2109 should have exited above, returning 0. */
2110 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2112 if (DECL_ODR_USED (olddecl
))
2113 /* From [temp.expl.spec]:
2115 If a template, a member template or the member of a class
2116 template is explicitly specialized then that
2117 specialization shall be declared before the first use of
2118 that specialization that would cause an implicit
2119 instantiation to take place, in every translation unit in
2120 which such a use occurs. */
2121 error ("explicit specialization of %qD after first use",
2124 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2126 /* Don't propagate visibility from the template to the
2127 specialization here. We'll do that in determine_visibility if
2129 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2131 /* [temp.expl.spec/14] We don't inline explicit specialization
2132 just because the primary template says so. */
2134 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2135 the always_inline attribute. */
2136 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2137 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2139 if (DECL_DECLARED_INLINE_P (newdecl
))
2140 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2142 DECL_ATTRIBUTES (newdecl
)
2143 = remove_attribute ("always_inline",
2144 DECL_ATTRIBUTES (newdecl
));
2147 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2149 /* Never inline re-defined extern inline functions.
2150 FIXME: this could be better handled by keeping both
2151 function as separate declarations. */
2152 DECL_UNINLINABLE (newdecl
) = 1;
2156 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2157 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2159 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2161 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2162 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2164 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2165 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2166 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2167 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2170 /* Preserve abstractness on cloned [cd]tors. */
2171 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2173 /* Update newdecl's parms to point at olddecl. */
2174 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2175 parm
= DECL_CHAIN (parm
))
2176 DECL_CONTEXT (parm
) = olddecl
;
2180 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2181 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2182 COPY_DECL_RTL (newdecl
, olddecl
);
2184 if (! types_match
|| new_defines_function
)
2186 /* These need to be copied so that the names are available.
2187 Note that if the types do match, we'll preserve inline
2188 info and other bits, but if not, we won't. */
2189 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2190 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2192 /* If redeclaring a builtin function, it stays built in
2193 if newdecl is a gnu_inline definition, or if newdecl is just
2195 if (DECL_BUILT_IN (olddecl
)
2196 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2198 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2199 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2200 /* If we're keeping the built-in definition, keep the rtl,
2201 regardless of declaration matches. */
2202 COPY_DECL_RTL (olddecl
, newdecl
);
2203 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2205 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2208 /* If a compatible prototype of these builtin functions
2209 is seen, assume the runtime implements it with the
2210 expected semantics. */
2211 case BUILT_IN_STPCPY
:
2212 if (builtin_decl_explicit_p (fncode
))
2213 set_builtin_decl_implicit_p (fncode
, true);
2220 if (new_defines_function
)
2221 /* If defining a function declared with other language
2222 linkage, use the previously declared language linkage. */
2223 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2224 else if (types_match
)
2226 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2227 /* Don't clear out the arguments if we're just redeclaring a
2229 if (DECL_ARGUMENTS (olddecl
))
2230 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2233 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2234 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2236 /* Now preserve various other info from the definition. */
2237 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2238 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2239 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2240 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2242 /* Warn about conflicting visibility specifications. */
2243 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2244 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2245 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2247 warning_at (input_location
, OPT_Wattributes
,
2248 "%q+D: visibility attribute ignored because it", newdecl
);
2249 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2250 "conflicts with previous declaration here");
2252 /* Choose the declaration which specified visibility. */
2253 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2255 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2256 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2258 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2259 so keep this behavior. */
2260 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2262 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2263 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2265 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2266 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2268 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2269 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2271 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2272 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2273 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2275 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2276 with that from NEWDECL below. */
2277 if (DECL_LANG_SPECIFIC (olddecl
))
2279 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2280 != DECL_LANG_SPECIFIC (newdecl
));
2281 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2284 /* Merge the USED information. */
2285 if (TREE_USED (olddecl
))
2286 TREE_USED (newdecl
) = 1;
2287 else if (TREE_USED (newdecl
))
2288 TREE_USED (olddecl
) = 1;
2289 if (TREE_CODE (newdecl
) == VAR_DECL
)
2291 if (DECL_READ_P (olddecl
))
2292 DECL_READ_P (newdecl
) = 1;
2293 else if (DECL_READ_P (newdecl
))
2294 DECL_READ_P (olddecl
) = 1;
2296 if (DECL_PRESERVE_P (olddecl
))
2297 DECL_PRESERVE_P (newdecl
) = 1;
2298 else if (DECL_PRESERVE_P (newdecl
))
2299 DECL_PRESERVE_P (olddecl
) = 1;
2301 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2302 to olddecl and deleted. */
2303 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2304 && DECL_FUNCTION_VERSIONED (olddecl
))
2306 /* Set the flag for newdecl so that it gets copied to olddecl. */
2307 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2308 /* newdecl will be purged after copying to olddecl and is no longer
2310 delete_function_version (newdecl
);
2313 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2317 function_size
= sizeof (struct tree_decl_common
);
2319 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2320 (char *) newdecl
+ sizeof (struct tree_common
),
2321 function_size
- sizeof (struct tree_common
));
2323 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2324 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2325 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2326 if (new_template_info
)
2327 /* If newdecl is a template instantiation, it is possible that
2328 the following sequence of events has occurred:
2330 o A friend function was declared in a class template. The
2331 class template was instantiated.
2333 o The instantiation of the friend declaration was
2334 recorded on the instantiation list, and is newdecl.
2336 o Later, however, instantiate_class_template called pushdecl
2337 on the newdecl to perform name injection. But, pushdecl in
2338 turn called duplicate_decls when it discovered that another
2339 declaration of a global function with the same name already
2342 o Here, in duplicate_decls, we decided to clobber newdecl.
2344 If we're going to do that, we'd better make sure that
2345 olddecl, and not newdecl, is on the list of
2346 instantiations so that if we try to do the instantiation
2347 again we won't get the clobbered declaration. */
2348 reregister_specialization (newdecl
,
2354 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2355 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2356 (char *) newdecl
+ sizeof (struct tree_common
),
2357 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2358 switch (TREE_CODE (olddecl
))
2368 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2369 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2370 size
- sizeof (struct tree_decl_common
)
2371 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2375 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2376 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2377 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2378 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2382 DECL_UID (olddecl
) = olddecl_uid
;
2384 DECL_FRIEND_P (olddecl
) = 1;
2387 DECL_ANTICIPATED (olddecl
) = 1;
2388 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2391 /* NEWDECL contains the merged attribute lists.
2392 Update OLDDECL to be the same. */
2393 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2395 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2396 so that encode_section_info has a chance to look at the new decl
2397 flags and attributes. */
2398 if (DECL_RTL_SET_P (olddecl
)
2399 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2400 || (TREE_CODE (olddecl
) == VAR_DECL
2401 && TREE_STATIC (olddecl
))))
2402 make_decl_rtl (olddecl
);
2404 /* The NEWDECL will no longer be needed. Because every out-of-class
2405 declaration of a member results in a call to duplicate_decls,
2406 freeing these nodes represents in a significant savings. */
2412 /* Return zero if the declaration NEWDECL is valid
2413 when the declaration OLDDECL (assumed to be for the same name)
2414 has already been seen.
2415 Otherwise return an error message format string with a %s
2416 where the identifier should go. */
2419 redeclaration_error_message (tree newdecl
, tree olddecl
)
2421 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2423 /* Because C++ can put things into name space for free,
2424 constructs like "typedef struct foo { ... } foo"
2425 would look like an erroneous redeclaration. */
2426 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2429 return G_("redefinition of %q#D");
2431 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2433 /* If this is a pure function, its olddecl will actually be
2434 the original initialization to `0' (which we force to call
2435 abort()). Don't complain about redefinition in this case. */
2436 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2437 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2440 /* If both functions come from different namespaces, this is not
2441 a redeclaration - this is a conflict with a used function. */
2442 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2443 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2444 && ! decls_match (olddecl
, newdecl
))
2445 return G_("%qD conflicts with used function");
2447 /* We'll complain about linkage mismatches in
2448 warn_extern_redeclared_static. */
2450 /* Defining the same name twice is no good. */
2451 if (DECL_INITIAL (olddecl
) != NULL_TREE
2452 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2454 if (DECL_NAME (olddecl
) == NULL_TREE
)
2455 return G_("%q#D not declared in class");
2456 else if (!GNU_INLINE_P (olddecl
)
2457 || GNU_INLINE_P (newdecl
))
2458 return G_("redefinition of %q#D");
2461 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2463 bool olda
= GNU_INLINE_P (olddecl
);
2464 bool newa
= GNU_INLINE_P (newdecl
);
2469 return G_("%q+D redeclared inline with "
2470 "%<gnu_inline%> attribute");
2472 return G_("%q+D redeclared inline without "
2473 "%<gnu_inline%> attribute");
2477 check_abi_tag_redeclaration
2478 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2479 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2483 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2487 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2489 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2490 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2491 return G_("redefinition of %q#D");
2495 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2496 || (DECL_TEMPLATE_RESULT (newdecl
)
2497 == DECL_TEMPLATE_RESULT (olddecl
)))
2500 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2501 if (DECL_TEMPLATE_INFO (nt
))
2502 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2503 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2504 if (DECL_TEMPLATE_INFO (ot
))
2505 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2506 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2507 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2508 return G_("redefinition of %q#D");
2510 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2512 bool olda
= GNU_INLINE_P (ot
);
2513 bool newa
= GNU_INLINE_P (nt
);
2518 return G_("%q+D redeclared inline with "
2519 "%<gnu_inline%> attribute");
2521 return G_("%q+D redeclared inline without "
2522 "%<gnu_inline%> attribute");
2526 /* Core issue #226 (C++0x):
2528 If a friend function template declaration specifies a
2529 default template-argument, that declaration shall be a
2530 definition and shall be the only declaration of the
2531 function template in the translation unit. */
2532 if ((cxx_dialect
!= cxx98
)
2533 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2534 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2535 /*is_primary=*/true,
2536 /*is_partial=*/false,
2537 /*is_friend_decl=*/2))
2538 return G_("redeclaration of friend %q#D "
2539 "may not have default template arguments");
2543 else if (TREE_CODE (newdecl
) == VAR_DECL
2544 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2545 && (! DECL_LANG_SPECIFIC (olddecl
)
2546 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2547 || DECL_THREAD_LOCAL_P (newdecl
)))
2549 /* Only variables can be thread-local, and all declarations must
2550 agree on this property. */
2551 if (DECL_THREAD_LOCAL_P (newdecl
))
2552 return G_("thread-local declaration of %q#D follows "
2553 "non-thread-local declaration");
2555 return G_("non-thread-local declaration of %q#D follows "
2556 "thread-local declaration");
2558 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2560 /* The objects have been declared at namespace scope. If either
2561 is a member of an anonymous union, then this is an invalid
2562 redeclaration. For example:
2568 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2569 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2570 return G_("redeclaration of %q#D");
2571 /* If at least one declaration is a reference, there is no
2572 conflict. For example:
2578 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2580 /* Reject two definitions. */
2581 return G_("redefinition of %q#D");
2585 /* Objects declared with block scope: */
2586 /* Reject two definitions, and reject a definition
2587 together with an external reference. */
2588 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2589 return G_("redeclaration of %q#D");
2594 /* Hash and equality functions for the named_label table. */
2597 named_label_entry_hash (const void *data
)
2599 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2600 return DECL_UID (ent
->label_decl
);
2604 named_label_entry_eq (const void *a
, const void *b
)
2606 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2607 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2608 return ent_a
->label_decl
== ent_b
->label_decl
;
2611 /* Create a new label, named ID. */
2614 make_label_decl (tree id
, int local_p
)
2616 struct named_label_entry
*ent
;
2620 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2622 DECL_CONTEXT (decl
) = current_function_decl
;
2623 DECL_MODE (decl
) = VOIDmode
;
2624 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2626 /* Say where one reference is to the label, for the sake of the
2627 error if it is not defined. */
2628 DECL_SOURCE_LOCATION (decl
) = input_location
;
2630 /* Record the fact that this identifier is bound to this label. */
2631 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2633 /* Create the label htab for the function on demand. */
2635 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2636 named_label_entry_eq
, NULL
);
2638 /* Record this label on the list of labels used in this function.
2639 We do this before calling make_label_decl so that we get the
2640 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2641 ent
= ggc_alloc_cleared_named_label_entry ();
2642 ent
->label_decl
= decl
;
2644 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2645 gcc_assert (*slot
== NULL
);
2651 /* Look for a label named ID in the current function. If one cannot
2652 be found, create one. (We keep track of used, but undefined,
2653 labels, and complain about them at the end of a function.) */
2656 lookup_label_1 (tree id
)
2660 /* You can't use labels at global scope. */
2661 if (current_function_decl
== NULL_TREE
)
2663 error ("label %qE referenced outside of any function", id
);
2667 /* See if we've already got this label. */
2668 decl
= IDENTIFIER_LABEL_VALUE (id
);
2669 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2672 decl
= make_label_decl (id
, /*local_p=*/0);
2676 /* Wrapper for lookup_label_1. */
2679 lookup_label (tree id
)
2682 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2683 ret
= lookup_label_1 (id
);
2684 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2688 /* Declare a local label named ID. */
2691 declare_local_label (tree id
)
2694 cp_label_binding bind
;
2696 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2697 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2698 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2700 decl
= make_label_decl (id
, /*local_p=*/1);
2702 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2707 /* Returns nonzero if it is ill-formed to jump past the declaration of
2708 DECL. Returns 2 if it's also a real problem. */
2711 decl_jump_unsafe (tree decl
)
2713 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2714 with automatic storage duration is not in scope to a point where it is
2715 in scope is ill-formed unless the variable has scalar type, class type
2716 with a trivial default constructor and a trivial destructor, a
2717 cv-qualified version of one of these types, or an array of one of the
2718 preceding types and is declared without an initializer (8.5). */
2719 tree type
= TREE_TYPE (decl
);
2721 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2722 || type
== error_mark_node
)
2725 type
= strip_array_types (type
);
2727 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2730 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2736 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2739 identify_goto (tree decl
, const location_t
*locus
)
2742 permerror (input_location
, "jump to label %qD", decl
);
2744 permerror (input_location
, "jump to case label");
2746 permerror (*locus
, " from here");
2749 /* Check that a single previously seen jump to a newly defined label
2750 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2751 the jump context; NAMES are the names in scope in LEVEL at the jump
2752 context; LOCUS is the source position of the jump or 0. Returns
2753 true if all is well. */
2756 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2757 bool exited_omp
, const location_t
*locus
)
2759 cp_binding_level
*b
;
2760 bool identified
= false, saw_eh
= false, saw_omp
= false;
2764 identify_goto (decl
, locus
);
2765 error (" exits OpenMP structured block");
2766 identified
= saw_omp
= true;
2769 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2771 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2773 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2774 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2775 : TREE_CHAIN (new_decls
)))
2777 int problem
= decl_jump_unsafe (new_decls
);
2783 identify_goto (decl
, locus
);
2787 error (" crosses initialization of %q+#D", new_decls
);
2789 permerror (input_location
, " enters scope of %q+#D which has "
2790 "non-trivial destructor", new_decls
);
2795 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2799 identify_goto (decl
, locus
);
2802 if (b
->kind
== sk_try
)
2803 error (" enters try block");
2805 error (" enters catch block");
2808 if (b
->kind
== sk_omp
&& !saw_omp
)
2812 identify_goto (decl
, locus
);
2815 error (" enters OpenMP structured block");
2824 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2826 check_previous_goto_1 (decl
, use
->binding_level
,
2827 use
->names_in_scope
, use
->in_omp_scope
,
2828 &use
->o_goto_locus
);
2832 check_switch_goto (cp_binding_level
* level
)
2834 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2837 /* Check that a new jump to a label DECL is OK. Called by
2838 finish_goto_stmt. */
2841 check_goto (tree decl
)
2843 struct named_label_entry
*ent
, dummy
;
2844 bool saw_catch
= false, identified
= false;
2848 /* We can't know where a computed goto is jumping.
2849 So we assume that it's OK. */
2850 if (TREE_CODE (decl
) != LABEL_DECL
)
2853 /* We didn't record any information about this label when we created it,
2854 and there's not much point since it's trivial to analyze as a return. */
2855 if (decl
== cdtor_label
)
2858 dummy
.label_decl
= decl
;
2859 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2860 gcc_assert (ent
!= NULL
);
2862 /* If the label hasn't been defined yet, defer checking. */
2863 if (! DECL_INITIAL (decl
))
2865 struct named_label_use_entry
*new_use
;
2867 /* Don't bother creating another use if the last goto had the
2868 same data, and will therefore create the same set of errors. */
2870 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2873 new_use
= ggc_alloc_named_label_use_entry ();
2874 new_use
->binding_level
= current_binding_level
;
2875 new_use
->names_in_scope
= current_binding_level
->names
;
2876 new_use
->o_goto_locus
= input_location
;
2877 new_use
->in_omp_scope
= false;
2879 new_use
->next
= ent
->uses
;
2880 ent
->uses
= new_use
;
2884 if (ent
->in_try_scope
|| ent
->in_catch_scope
2885 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2887 permerror (input_location
, "jump to label %q+D", decl
);
2888 permerror (input_location
, " from here");
2892 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2894 int u
= decl_jump_unsafe (bad
);
2896 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2898 /* Can't skip init of __exception_info. */
2899 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2903 error (" skips initialization of %q+#D", bad
);
2905 permerror (input_location
, " enters scope of %q+#D which has "
2906 "non-trivial destructor", bad
);
2909 if (ent
->in_try_scope
)
2910 error (" enters try block");
2911 else if (ent
->in_catch_scope
&& !saw_catch
)
2912 error (" enters catch block");
2914 if (ent
->in_omp_scope
)
2915 error (" enters OpenMP structured block");
2916 else if (flag_openmp
)
2918 cp_binding_level
*b
;
2919 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2921 if (b
== ent
->binding_level
)
2923 if (b
->kind
== sk_omp
)
2927 permerror (input_location
, "jump to label %q+D", decl
);
2928 permerror (input_location
, " from here");
2931 error (" exits OpenMP structured block");
2938 /* Check that a return is ok wrt OpenMP structured blocks.
2939 Called by finish_return_stmt. Returns true if all is well. */
2942 check_omp_return (void)
2944 cp_binding_level
*b
;
2945 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2946 if (b
->kind
== sk_omp
)
2948 error ("invalid exit from OpenMP structured block");
2951 else if (b
->kind
== sk_function_parms
)
2956 /* Define a label, specifying the location in the source file.
2957 Return the LABEL_DECL node for the label. */
2960 define_label_1 (location_t location
, tree name
)
2962 struct named_label_entry
*ent
, dummy
;
2963 cp_binding_level
*p
;
2966 decl
= lookup_label (name
);
2968 dummy
.label_decl
= decl
;
2969 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2970 gcc_assert (ent
!= NULL
);
2972 /* After labels, make any new cleanups in the function go into their
2973 own new (temporary) binding contour. */
2974 for (p
= current_binding_level
;
2975 p
->kind
!= sk_function_parms
;
2977 p
->more_cleanups_ok
= 0;
2979 if (name
== get_identifier ("wchar_t"))
2980 permerror (input_location
, "label named wchar_t");
2982 if (DECL_INITIAL (decl
) != NULL_TREE
)
2984 error ("duplicate label %qD", decl
);
2985 return error_mark_node
;
2989 struct named_label_use_entry
*use
;
2991 /* Mark label as having been defined. */
2992 DECL_INITIAL (decl
) = error_mark_node
;
2993 /* Say where in the source. */
2994 DECL_SOURCE_LOCATION (decl
) = location
;
2996 ent
->binding_level
= current_binding_level
;
2997 ent
->names_in_scope
= current_binding_level
->names
;
2999 for (use
= ent
->uses
; use
; use
= use
->next
)
3000 check_previous_goto (decl
, use
);
3007 /* Wrapper for define_label_1. */
3010 define_label (location_t location
, tree name
)
3013 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3014 ret
= define_label_1 (location
, name
);
3015 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3022 cp_binding_level
*level
;
3023 struct cp_switch
*next
;
3024 /* The SWITCH_STMT being built. */
3026 /* A splay-tree mapping the low element of a case range to the high
3027 element, or NULL_TREE if there is no high element. Used to
3028 determine whether or not a new case label duplicates an old case
3029 label. We need a tree, rather than simply a hash table, because
3030 of the GNU case range extension. */
3034 /* A stack of the currently active switch statements. The innermost
3035 switch statement is on the top of the stack. There is no need to
3036 mark the stack for garbage collection because it is only active
3037 during the processing of the body of a function, and we never
3038 collect at that point. */
3040 static struct cp_switch
*switch_stack
;
3042 /* Called right after a switch-statement condition is parsed.
3043 SWITCH_STMT is the switch statement being parsed. */
3046 push_switch (tree switch_stmt
)
3048 struct cp_switch
*p
= XNEW (struct cp_switch
);
3049 p
->level
= current_binding_level
;
3050 p
->next
= switch_stack
;
3051 p
->switch_stmt
= switch_stmt
;
3052 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3059 struct cp_switch
*cs
= switch_stack
;
3060 location_t switch_location
;
3062 /* Emit warnings as needed. */
3063 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3064 if (!processing_template_decl
)
3065 c_do_switch_warnings (cs
->cases
, switch_location
,
3066 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3067 SWITCH_STMT_COND (cs
->switch_stmt
));
3069 splay_tree_delete (cs
->cases
);
3070 switch_stack
= switch_stack
->next
;
3074 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3075 condition. Note that if TYPE and VALUE are already integral we don't
3076 really do the conversion because the language-independent
3077 warning/optimization code will work better that way. */
3080 case_conversion (tree type
, tree value
)
3082 if (value
== NULL_TREE
)
3085 if (cxx_dialect
>= cxx0x
3086 && (SCOPED_ENUM_P (type
)
3087 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3089 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3090 type
= type_promotes_to (type
);
3091 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3093 return cxx_constant_value (value
);
3096 /* Note that we've seen a definition of a case label, and complain if this
3097 is a bad place for one. */
3100 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3103 cp_binding_level
*p
;
3106 if (processing_template_decl
)
3110 /* For templates, just add the case label; we'll do semantic
3111 analysis at instantiation-time. */
3112 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3113 return add_stmt (build_case_label (low_value
, high_value
, label
));
3116 /* Find the condition on which this switch statement depends. */
3117 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3118 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3119 cond
= TREE_VALUE (cond
);
3121 if (!check_switch_goto (switch_stack
->level
))
3122 return error_mark_node
;
3124 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3126 low_value
= case_conversion (type
, low_value
);
3127 high_value
= case_conversion (type
, high_value
);
3129 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3130 low_value
, high_value
);
3132 /* After labels, make any new cleanups in the function go into their
3133 own new (temporary) binding contour. */
3134 for (p
= current_binding_level
;
3135 p
->kind
!= sk_function_parms
;
3137 p
->more_cleanups_ok
= 0;
3142 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3145 typename_hash (const void* k
)
3148 const_tree
const t
= (const_tree
) k
;
3150 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3151 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3156 typedef struct typename_info
{
3164 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3165 really of type `typename_info*' */
3168 typename_compare (const void * k1
, const void * k2
)
3170 const_tree
const t1
= (const_tree
) k1
;
3171 const typename_info
*const t2
= (const typename_info
*) k2
;
3173 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3174 && TYPE_CONTEXT (t1
) == t2
->scope
3175 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3176 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3177 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3180 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3181 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3183 Returns the new TYPENAME_TYPE. */
3185 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3188 build_typename_type (tree context
, tree name
, tree fullname
,
3189 enum tag_types tag_type
)
3197 if (typename_htab
== NULL
)
3198 typename_htab
= htab_create_ggc (61, &typename_hash
,
3199 &typename_compare
, NULL
);
3201 ti
.scope
= FROB_CONTEXT (context
);
3203 ti
.template_id
= fullname
;
3204 ti
.enum_p
= tag_type
== enum_type
;
3205 ti
.class_p
= (tag_type
== class_type
3206 || tag_type
== record_type
3207 || tag_type
== union_type
);
3208 hash
= (htab_hash_pointer (ti
.scope
)
3209 ^ htab_hash_pointer (ti
.name
));
3211 /* See if we already have this type. */
3212 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3217 /* Build the TYPENAME_TYPE. */
3218 t
= cxx_make_type (TYPENAME_TYPE
);
3219 TYPE_CONTEXT (t
) = ti
.scope
;
3220 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3221 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3222 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3224 /* Build the corresponding TYPE_DECL. */
3225 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3226 TYPE_NAME (TREE_TYPE (d
)) = d
;
3227 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3228 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3229 DECL_ARTIFICIAL (d
) = 1;
3231 /* Store it in the hash table. */
3234 /* TYPENAME_TYPEs must always be compared structurally, because
3235 they may or may not resolve down to another type depending on
3236 the currently open classes. */
3237 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3243 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3244 provided to name the type. Returns an appropriate type, unless an
3245 error occurs, in which case error_mark_node is returned. If we
3246 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3247 return that, rather than the _TYPE it corresponds to, in other
3248 cases we look through the type decl. If TF_ERROR is set, complain
3249 about errors, otherwise be quiet. */
3252 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3253 tsubst_flags_t complain
)
3259 if (name
== error_mark_node
3260 || context
== NULL_TREE
3261 || context
== error_mark_node
)
3262 return error_mark_node
;
3266 if (!(TYPE_LANG_SPECIFIC (name
)
3267 && (CLASSTYPE_IS_TEMPLATE (name
)
3268 || CLASSTYPE_USE_TEMPLATE (name
))))
3269 name
= TYPE_IDENTIFIER (name
);
3271 /* Create a TEMPLATE_ID_EXPR for the type. */
3272 name
= build_nt (TEMPLATE_ID_EXPR
,
3273 CLASSTYPE_TI_TEMPLATE (name
),
3274 CLASSTYPE_TI_ARGS (name
));
3276 else if (TREE_CODE (name
) == TYPE_DECL
)
3277 name
= DECL_NAME (name
);
3281 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3283 name
= TREE_OPERAND (name
, 0);
3284 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3285 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3286 else if (TREE_CODE (name
) == OVERLOAD
)
3288 if (complain
& tf_error
)
3289 error ("%qD is not a type", name
);
3290 return error_mark_node
;
3293 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3295 if (complain
& tf_error
)
3296 error ("%qD used without template parameters", name
);
3297 return error_mark_node
;
3299 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3300 gcc_assert (TYPE_P (context
));
3302 if (!MAYBE_CLASS_TYPE_P (context
))
3304 if (complain
& tf_error
)
3305 error ("%q#T is not a class", context
);
3306 return error_mark_node
;
3309 /* When the CONTEXT is a dependent type, NAME could refer to a
3310 dependent base class of CONTEXT. But look inside it anyway
3311 if CONTEXT is a currently open scope, in case it refers to a
3312 member of the current instantiation or a non-dependent base;
3313 lookup will stop when we hit a dependent base. */
3314 if (!dependent_scope_p (context
))
3315 /* We should only set WANT_TYPE when we're a nested typename type.
3316 Then we can give better diagnostics if we find a non-type. */
3317 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3321 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3322 return build_typename_type (context
, name
, fullname
, tag_type
);
3324 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3328 if (complain
& tf_error
)
3329 error (want_template
? G_("no class template named %q#T in %q#T")
3330 : G_("no type named %q#T in %q#T"), name
, context
);
3331 return error_mark_node
;
3334 /* Pull out the template from an injected-class-name (or multiple). */
3336 t
= maybe_get_template_decl_from_type_decl (t
);
3338 if (TREE_CODE (t
) == TREE_LIST
)
3340 if (complain
& tf_error
)
3342 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3343 print_candidates (t
);
3345 return error_mark_node
;
3348 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3350 if (complain
& tf_error
)
3351 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3353 return error_mark_node
;
3355 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3357 if (complain
& tf_error
)
3358 error ("%<typename %T::%D%> names %q#T, which is not a type",
3360 return error_mark_node
;
3363 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3364 return error_mark_node
;
3366 /* If we are currently parsing a template and if T is a typedef accessed
3367 through CONTEXT then we need to remember and check access of T at
3368 template instantiation time. */
3369 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3372 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3374 /*entering_scope=*/0,
3375 tf_warning_or_error
| tf_user
);
3377 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3380 maybe_record_typedef_use (t
);
3385 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3386 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3387 in which case error_mark_node is returned.
3389 If PARM_LIST is non-NULL, also make sure that the template parameter
3390 list of TEMPLATE_DECL matches.
3392 If COMPLAIN zero, don't complain about any errors that occur. */
3395 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3396 tsubst_flags_t complain
)
3402 name
= TYPE_IDENTIFIER (name
);
3403 else if (DECL_P (name
))
3404 name
= DECL_NAME (name
);
3405 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3407 if (!dependent_type_p (context
)
3408 || currently_open_class (context
))
3410 tree tmpl
= NULL_TREE
;
3412 if (MAYBE_CLASS_TYPE_P (context
))
3413 tmpl
= lookup_field (context
, name
, 0, false);
3415 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3416 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3418 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3420 if (complain
& tf_error
)
3421 error ("no class template named %q#T in %q#T", name
, context
);
3422 return error_mark_node
;
3426 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3428 if (complain
& tf_error
)
3430 error ("template parameters do not match template");
3431 error ("%q+D declared here", tmpl
);
3433 return error_mark_node
;
3436 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3438 return error_mark_node
;
3443 /* Build the UNBOUND_CLASS_TEMPLATE. */
3444 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3445 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3446 TREE_TYPE (t
) = NULL_TREE
;
3447 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3449 /* Build the corresponding TEMPLATE_DECL. */
3450 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3451 TYPE_NAME (TREE_TYPE (d
)) = d
;
3452 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3453 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3454 DECL_ARTIFICIAL (d
) = 1;
3455 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3462 /* Push the declarations of builtin types into the namespace.
3463 RID_INDEX is the index of the builtin type in the array
3464 RID_POINTERS. NAME is the name used when looking up the builtin
3465 type. TYPE is the _TYPE node for the builtin type. */
3468 record_builtin_type (enum rid rid_index
,
3472 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3473 tree tdecl
= NULL_TREE
;
3475 if ((int) rid_index
< (int) RID_MAX
)
3476 rname
= ridpointers
[(int) rid_index
];
3478 tname
= get_identifier (name
);
3480 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3481 eliminated. Built-in types should not be looked up name; their
3482 names are keywords that the parser can recognize. However, there
3483 is code in c-common.c that uses identifier_global_value to look
3484 up built-in types by name. */
3487 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3488 DECL_ARTIFICIAL (tdecl
) = 1;
3489 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3495 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3496 DECL_ARTIFICIAL (tdecl
) = 1;
3498 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3501 if (!TYPE_NAME (type
))
3502 TYPE_NAME (type
) = tdecl
;
3505 debug_hooks
->type_decl (tdecl
, 0);
3508 /* Record one of the standard Java types.
3509 * Declare it as having the given NAME.
3510 * If SIZE > 0, it is the size of one of the integral types;
3511 * otherwise it is the negative of the size of one of the other types. */
3514 record_builtin_java_type (const char* name
, int size
)
3519 type
= build_nonstandard_integer_type (size
, 0);
3520 type
= build_distinct_type_copy (type
);
3522 else if (size
> -32)
3525 /* "__java_char" or ""__java_boolean". */
3526 type
= build_nonstandard_integer_type (-size
, 1);
3527 type
= build_distinct_type_copy (type
);
3528 /* Get the signed type cached and attached to the unsigned type,
3529 so it doesn't get garbage-collected at "random" times,
3530 causing potential codegen differences out of different UIDs
3531 and different alias set numbers. */
3532 stype
= build_nonstandard_integer_type (-size
, 0);
3533 stype
= build_distinct_type_copy (stype
);
3534 TREE_CHAIN (type
) = stype
;
3535 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3538 { /* "__java_float" or ""__java_double". */
3539 type
= make_node (REAL_TYPE
);
3540 TYPE_PRECISION (type
) = - size
;
3543 record_builtin_type (RID_MAX
, name
, type
);
3544 decl
= TYPE_NAME (type
);
3546 /* Suppress generate debug symbol entries for these types,
3547 since for normal C++ they are just clutter.
3548 However, push_lang_context undoes this if extern "Java" is seen. */
3549 DECL_IGNORED_P (decl
) = 1;
3551 TYPE_FOR_JAVA (type
) = 1;
3555 /* Push a type into the namespace so that the back ends ignore it. */
3558 record_unknown_type (tree type
, const char* name
)
3560 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3561 TYPE_DECL
, get_identifier (name
), type
));
3562 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3563 DECL_IGNORED_P (decl
) = 1;
3564 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3565 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3566 TYPE_ALIGN (type
) = 1;
3567 TYPE_USER_ALIGN (type
) = 0;
3568 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3571 /* A string for which we should create an IDENTIFIER_NODE at
3574 typedef struct predefined_identifier
3576 /* The name of the identifier. */
3577 const char *const name
;
3578 /* The place where the IDENTIFIER_NODE should be stored. */
3580 /* Nonzero if this is the name of a constructor or destructor. */
3581 const int ctor_or_dtor_p
;
3582 } predefined_identifier
;
3584 /* Create all the predefined identifiers. */
3587 initialize_predefined_identifiers (void)
3589 const predefined_identifier
*pid
;
3591 /* A table of identifiers to create at startup. */
3592 static const predefined_identifier predefined_identifiers
[] = {
3593 { "C++", &lang_name_cplusplus
, 0 },
3594 { "C", &lang_name_c
, 0 },
3595 { "Java", &lang_name_java
, 0 },
3596 /* Some of these names have a trailing space so that it is
3597 impossible for them to conflict with names written by users. */
3598 { "__ct ", &ctor_identifier
, 1 },
3599 { "__base_ctor ", &base_ctor_identifier
, 1 },
3600 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3601 { "__dt ", &dtor_identifier
, 1 },
3602 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3603 { "__base_dtor ", &base_dtor_identifier
, 1 },
3604 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3605 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3606 { "nelts", &nelts_identifier
, 0 },
3607 { THIS_NAME
, &this_identifier
, 0 },
3608 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3609 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3610 { "_vptr", &vptr_identifier
, 0 },
3611 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3612 { "::", &global_scope_name
, 0 },
3613 { "std", &std_identifier
, 0 },
3617 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3619 *pid
->node
= get_identifier (pid
->name
);
3620 if (pid
->ctor_or_dtor_p
)
3621 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3625 /* Create the predefined scalar types of C,
3626 and some nodes representing standard constants (0, 1, (void *)0).
3627 Initialize the global binding level.
3628 Make definitions for built-in primitive functions. */
3631 cxx_init_decl_processing (void)
3634 tree void_ftype_ptr
;
3636 /* Create all the identifiers we need. */
3637 initialize_predefined_identifiers ();
3639 /* Create the global variables. */
3640 push_to_top_level ();
3642 current_function_decl
= NULL_TREE
;
3643 current_binding_level
= NULL
;
3644 /* Enter the global namespace. */
3645 gcc_assert (global_namespace
== NULL_TREE
);
3646 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3648 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3649 TREE_PUBLIC (global_namespace
) = 1;
3650 begin_scope (sk_namespace
, global_namespace
);
3652 if (flag_visibility_ms_compat
)
3653 default_visibility
= VISIBILITY_HIDDEN
;
3656 current_lang_name
= lang_name_c
;
3658 /* Create the `std' namespace. */
3659 push_namespace (std_identifier
);
3660 std_node
= current_namespace
;
3663 c_common_nodes_and_builtins ();
3665 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3666 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3667 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3668 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3669 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3670 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3671 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3672 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3674 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3676 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3677 truthvalue_type_node
= boolean_type_node
;
3678 truthvalue_false_node
= boolean_false_node
;
3679 truthvalue_true_node
= boolean_true_node
;
3681 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3682 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3683 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3686 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3689 delta_type_node
= ptrdiff_type_node
;
3690 vtable_index_type
= ptrdiff_type_node
;
3692 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3693 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3694 void_ftype_ptr
= build_function_type_list (void_type_node
,
3695 ptr_type_node
, NULL_TREE
);
3697 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3699 /* C++ extensions */
3701 unknown_type_node
= make_node (LANG_TYPE
);
3702 record_unknown_type (unknown_type_node
, "unknown type");
3704 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3705 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3707 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3709 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3710 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3712 init_list_type_node
= make_node (LANG_TYPE
);
3713 record_unknown_type (init_list_type_node
, "init list");
3716 /* Make sure we get a unique function type, so we can give
3717 its pointer type a name. (This wins for gdb.) */
3718 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3719 TREE_TYPE (vfunc_type
) = integer_type_node
;
3720 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3721 layout_type (vfunc_type
);
3723 vtable_entry_type
= build_pointer_type (vfunc_type
);
3725 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3728 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3729 layout_type (vtbl_type_node
);
3730 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3731 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3732 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3733 layout_type (vtbl_ptr_type_node
);
3734 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3736 push_namespace (get_identifier ("__cxxabiv1"));
3737 abi_node
= current_namespace
;
3740 global_type_node
= make_node (LANG_TYPE
);
3741 record_unknown_type (global_type_node
, "global type");
3744 current_lang_name
= lang_name_cplusplus
;
3747 tree newattrs
, extvisattr
;
3748 tree newtype
, deltype
;
3749 tree ptr_ftype_sizetype
;
3753 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3754 if (cxx_dialect
== cxx98
)
3757 tree bad_alloc_type_node
;
3758 tree bad_alloc_decl
;
3760 push_namespace (std_identifier
);
3761 bad_alloc_id
= get_identifier ("bad_alloc");
3762 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3763 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3765 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3766 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3770 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3773 new_eh_spec
= noexcept_false_spec
;
3775 /* Ensure attribs.c is initialized. */
3777 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3779 newattrs
= tree_cons (get_identifier ("alloc_size"),
3780 build_tree_list (NULL_TREE
, integer_one_node
),
3782 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3783 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3784 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3785 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3786 push_cp_library_fn (NEW_EXPR
, newtype
);
3787 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3788 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3789 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3791 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3792 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3793 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3794 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3795 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3796 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3797 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3798 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3802 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3804 /* Perform other language dependent initializations. */
3805 init_class_processing ();
3806 init_rtti_processing ();
3807 init_template_processing ();
3809 if (flag_exceptions
)
3810 init_exception_processing ();
3812 if (! supports_one_only ())
3815 make_fname_decl
= cp_make_fname_decl
;
3816 start_fname_decls ();
3818 /* Show we use EH for cleanups. */
3819 if (flag_exceptions
)
3820 using_eh_for_cleanups ();
3823 /* Generate an initializer for a function naming variable from
3824 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3825 filled in with the type of the init. */
3828 cp_fname_init (const char* name
, tree
*type_p
)
3830 tree domain
= NULL_TREE
;
3832 tree init
= NULL_TREE
;
3837 length
= strlen (name
);
3838 domain
= build_index_type (size_int (length
));
3839 init
= build_string (length
+ 1, name
);
3842 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3843 type
= build_cplus_array_type (type
, domain
);
3848 TREE_TYPE (init
) = type
;
3850 init
= error_mark_node
;
3855 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3856 the decl, LOC is the location to give the decl, NAME is the
3857 initialization string and TYPE_DEP indicates whether NAME depended
3858 on the type of the function. We make use of that to detect
3859 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3860 at the point of first use, so we mustn't push the decl now. */
3863 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3865 const char *const name
= (type_dep
&& processing_template_decl
3866 ? NULL
: fname_as_string (type_dep
));
3868 tree init
= cp_fname_init (name
, &type
);
3869 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3872 free (CONST_CAST (char *, name
));
3874 /* As we're using pushdecl_with_scope, we must set the context. */
3875 DECL_CONTEXT (decl
) = current_function_decl
;
3877 TREE_STATIC (decl
) = 1;
3878 TREE_READONLY (decl
) = 1;
3879 DECL_ARTIFICIAL (decl
) = 1;
3881 TREE_USED (decl
) = 1;
3883 if (current_function_decl
)
3885 cp_binding_level
*b
= current_binding_level
;
3886 if (b
->kind
== sk_function_parms
)
3887 return error_mark_node
;
3888 while (b
->level_chain
->kind
!= sk_function_parms
)
3890 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3891 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3892 LOOKUP_ONLYCONVERTING
);
3896 DECL_THIS_STATIC (decl
) = true;
3897 pushdecl_top_level_and_finish (decl
, init
);
3904 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3906 tree id
= DECL_NAME (decl
);
3907 const char *name
= IDENTIFIER_POINTER (id
);
3909 retrofit_lang_decl (decl
);
3911 DECL_ARTIFICIAL (decl
) = 1;
3912 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3913 SET_DECL_LANGUAGE (decl
, lang_c
);
3914 /* Runtime library routines are, by definition, available in an
3915 external shared object. */
3916 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3917 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3919 DECL_CONTEXT (decl
) = context
;
3922 pushdecl_top_level (decl
);
3926 /* A function in the user's namespace should have an explicit
3927 declaration before it is used. Mark the built-in function as
3928 anticipated but not actually declared. */
3929 if (name
[0] != '_' || name
[1] != '_')
3930 DECL_ANTICIPATED (decl
) = 1;
3931 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3933 size_t len
= strlen (name
);
3935 /* Treat __*_chk fortification functions as anticipated as well,
3936 unless they are __builtin_*. */
3937 if (len
> strlen ("___chk")
3938 && memcmp (name
+ len
- strlen ("_chk"),
3939 "_chk", strlen ("_chk") + 1) == 0)
3940 DECL_ANTICIPATED (decl
) = 1;
3947 cxx_builtin_function (tree decl
)
3949 tree id
= DECL_NAME (decl
);
3950 const char *name
= IDENTIFIER_POINTER (id
);
3951 /* All builtins that don't begin with an '_' should additionally
3952 go in the 'std' namespace. */
3955 tree decl2
= copy_node(decl
);
3956 push_namespace (std_identifier
);
3957 builtin_function_1 (decl2
, std_node
, false);
3961 return builtin_function_1 (decl
, NULL_TREE
, false);
3964 /* Like cxx_builtin_function, but guarantee the function is added to the global
3965 scope. This is to allow function specific options to add new machine
3966 dependent builtins when the target ISA changes via attribute((target(...)))
3967 which saves space on program startup if the program does not use non-generic
3971 cxx_builtin_function_ext_scope (tree decl
)
3974 tree id
= DECL_NAME (decl
);
3975 const char *name
= IDENTIFIER_POINTER (id
);
3976 /* All builtins that don't begin with an '_' should additionally
3977 go in the 'std' namespace. */
3980 tree decl2
= copy_node(decl
);
3981 push_namespace (std_identifier
);
3982 builtin_function_1 (decl2
, std_node
, true);
3986 return builtin_function_1 (decl
, NULL_TREE
, true);
3989 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3990 function. Not called directly. */
3993 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3995 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3996 DECL_EXTERNAL (fn
) = 1;
3997 TREE_PUBLIC (fn
) = 1;
3998 DECL_ARTIFICIAL (fn
) = 1;
3999 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4000 SET_DECL_LANGUAGE (fn
, lang_c
);
4001 /* Runtime library routines are, by definition, available in an
4002 external shared object. */
4003 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4004 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4008 /* Returns the _DECL for a library function with C linkage.
4009 We assume that such functions never throw; if this is incorrect,
4010 callers should unset TREE_NOTHROW. */
4013 build_library_fn (tree name
, tree type
)
4015 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
4016 TREE_NOTHROW (fn
) = 1;
4020 /* Returns the _DECL for a library function with C++ linkage. */
4023 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
4025 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
4026 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
4027 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4028 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4032 /* Like build_library_fn, but takes a C string instead of an
4036 build_library_fn_ptr (const char* name
, tree type
)
4038 return build_library_fn (get_identifier (name
), type
);
4041 /* Like build_cp_library_fn, but takes a C string instead of an
4045 build_cp_library_fn_ptr (const char* name
, tree type
)
4047 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
4050 /* Like build_library_fn, but also pushes the function so that we will
4051 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4052 may throw exceptions listed in RAISES. */
4055 push_library_fn (tree name
, tree type
, tree raises
)
4060 type
= build_exception_variant (type
, raises
);
4062 fn
= build_library_fn (name
, type
);
4063 pushdecl_top_level (fn
);
4067 /* Like build_cp_library_fn, but also pushes the function so that it
4068 will be found by normal lookup. */
4071 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4073 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4078 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4082 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4086 push_void_library_fn (tree name
, tree parmtypes
)
4088 tree type
= build_function_type (void_type_node
, parmtypes
);
4089 return push_library_fn (name
, type
, NULL_TREE
);
4092 /* Like push_library_fn, but also note that this function throws
4093 and does not return. Used for __throw_foo and the like. */
4096 push_throw_library_fn (tree name
, tree type
)
4098 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4099 TREE_THIS_VOLATILE (fn
) = 1;
4100 TREE_NOTHROW (fn
) = 0;
4104 /* When we call finish_struct for an anonymous union, we create
4105 default copy constructors and such. But, an anonymous union
4106 shouldn't have such things; this function undoes the damage to the
4107 anonymous union type T.
4109 (The reason that we create the synthesized methods is that we don't
4110 distinguish `union { int i; }' from `typedef union { int i; } U'.
4111 The first is an anonymous union; the second is just an ordinary
4115 fixup_anonymous_aggr (tree t
)
4119 /* Wipe out memory of synthesized methods. */
4120 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4121 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4122 TYPE_HAS_COPY_CTOR (t
) = 0;
4123 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4124 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4125 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4127 /* Splice the implicitly generated functions out of the TYPE_METHODS
4129 q
= &TYPE_METHODS (t
);
4132 if (DECL_ARTIFICIAL (*q
))
4133 *q
= TREE_CHAIN (*q
);
4135 q
= &DECL_CHAIN (*q
);
4138 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4139 if (TYPE_METHODS (t
))
4141 tree decl
= TYPE_MAIN_DECL (t
);
4143 if (TREE_CODE (t
) != UNION_TYPE
)
4144 error_at (DECL_SOURCE_LOCATION (decl
),
4145 "an anonymous struct cannot have function members");
4147 error_at (DECL_SOURCE_LOCATION (decl
),
4148 "an anonymous union cannot have function members");
4151 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4152 assignment operators (because they cannot have these methods themselves).
4153 For anonymous unions this is already checked because they are not allowed
4154 in any union, otherwise we have to check it. */
4155 if (TREE_CODE (t
) != UNION_TYPE
)
4159 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4160 if (TREE_CODE (field
) == FIELD_DECL
)
4162 type
= TREE_TYPE (field
);
4163 if (CLASS_TYPE_P (type
))
4165 if (TYPE_NEEDS_CONSTRUCTING (type
))
4166 error ("member %q+#D with constructor not allowed "
4167 "in anonymous aggregate", field
);
4168 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4169 error ("member %q+#D with destructor not allowed "
4170 "in anonymous aggregate", field
);
4171 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4172 error ("member %q+#D with copy assignment operator "
4173 "not allowed in anonymous aggregate", field
);
4179 /* Warn for an attribute located at LOCATION that appertains to the
4180 class type CLASS_TYPE that has not been properly placed after its
4181 class-key, in it class-specifier. */
4184 warn_misplaced_attr_for_class_type (source_location location
,
4187 gcc_assert (TAGGED_TYPE_P (class_type
));
4189 warning_at (location
, OPT_Wattributes
,
4190 "attribute ignored in declaration "
4191 "of %q#T", class_type
);
4193 "attribute for %q#T must follow the %qs keyword",
4194 class_type
, class_key_or_enum_as_string (class_type
));
4197 /* Make sure that a declaration with no declarator is well-formed, i.e.
4198 just declares a tagged type or anonymous union.
4200 Returns the type declared; or NULL_TREE if none. */
4203 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4204 bool explicit_type_instantiation_p
)
4206 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4207 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4208 /* If a class, struct, or enum type is declared by the DECLSPECS
4209 (i.e, if a class-specifier, enum-specifier, or non-typename
4210 elaborated-type-specifier appears in the DECLSPECS),
4211 DECLARED_TYPE is set to the corresponding type. */
4212 tree declared_type
= NULL_TREE
;
4213 bool error_p
= false;
4215 if (declspecs
->multiple_types_p
)
4216 error ("multiple types in one declaration");
4217 else if (declspecs
->redefined_builtin_type
)
4219 if (!in_system_header
)
4220 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4221 "redeclaration of C++ built-in type %qT",
4222 declspecs
->redefined_builtin_type
);
4227 && TYPE_P (declspecs
->type
)
4228 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4229 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4230 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4231 declared_type
= declspecs
->type
;
4232 else if (declspecs
->type
== error_mark_node
)
4234 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4235 permerror (input_location
, "declaration does not declare anything");
4236 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4238 error ("%<auto%> can only be specified for variables "
4239 "or function declarations");
4240 return error_mark_node
;
4242 /* Check for an anonymous union. */
4243 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4244 && TYPE_ANONYMOUS_P (declared_type
))
4246 /* 7/3 In a simple-declaration, the optional init-declarator-list
4247 can be omitted only when declaring a class (clause 9) or
4248 enumeration (7.2), that is, when the decl-specifier-seq contains
4249 either a class-specifier, an elaborated-type-specifier with
4250 a class-key (9.1), or an enum-specifier. In these cases and
4251 whenever a class-specifier or enum-specifier is present in the
4252 decl-specifier-seq, the identifiers in these specifiers are among
4253 the names being declared by the declaration (as class-name,
4254 enum-names, or enumerators, depending on the syntax). In such
4255 cases, and except for the declaration of an unnamed bit-field (9.6),
4256 the decl-specifier-seq shall introduce one or more names into the
4257 program, or shall redeclare a name introduced by a previous
4258 declaration. [Example:
4259 enum { }; // ill-formed
4260 typedef class { }; // ill-formed
4264 error ("missing type-name in typedef-declaration");
4267 /* Anonymous unions are objects, so they can have specifiers. */;
4268 SET_ANON_AGGR_TYPE_P (declared_type
);
4270 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4271 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4276 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4277 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4278 error ("%qs can only be specified for functions",
4279 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4280 ? "inline" : "virtual");
4282 && (!current_class_type
4283 || current_scope () != current_class_type
))
4284 error ("%<friend%> can only be specified inside a class");
4285 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4286 error ("%<explicit%> can only be specified for constructors");
4287 else if (declspecs
->storage_class
)
4288 error ("a storage class can only be specified for objects "
4290 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4291 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4292 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4293 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4294 error ("qualifiers can only be specified for objects "
4296 else if (saw_typedef
)
4297 warning (0, "%<typedef%> was ignored in this declaration");
4298 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4299 error ("%<constexpr%> cannot be used for type declarations");
4302 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4305 if (!CLASS_TYPE_P (declared_type
)
4306 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4307 /* For a non-template class, use the name location. */
4308 loc
= location_of (declared_type
);
4310 /* For a template class (an explicit instantiation), use the
4311 current location. */
4312 loc
= input_location
;
4314 if (explicit_type_instantiation_p
)
4315 /* [dcl.attr.grammar]/4:
4317 No attribute-specifier-seq shall appertain to an explicit
4320 warning_at (loc
, OPT_Wattributes
,
4321 "attribute ignored in explicit instantiation %q#T",
4324 "no attribute can be applied to "
4325 "an explicit instantiation");
4328 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4331 return declared_type
;
4334 /* Called when a declaration is seen that contains no names to declare.
4335 If its type is a reference to a structure, union or enum inherited
4336 from a containing scope, shadow that tag name for the current scope
4337 with a forward reference.
4338 If its type defines a new named structure or union
4339 or defines an enum, it is valid but we need not do anything here.
4340 Otherwise, it is an error.
4342 C++: may have to grok the declspecs to learn about static,
4343 complain for anonymous unions.
4345 Returns the TYPE declared -- or NULL_TREE if none. */
4348 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4350 tree t
= check_tag_decl (declspecs
,
4351 /*explicit_type_instantiation_p=*/false);
4356 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4359 /* This is where the variables in an anonymous union are
4360 declared. An anonymous union declaration looks like:
4362 because there is no declarator after the union, the parser
4363 sends that declaration here. */
4364 if (ANON_AGGR_TYPE_P (t
))
4366 fixup_anonymous_aggr (t
);
4368 if (TYPE_FIELDS (t
))
4370 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4371 declspecs
, NORMAL
, 0, NULL
);
4372 finish_anon_union (decl
);
4379 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4382 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4383 const cp_declarator
*declarator
,
4384 bool is_template_arg
)
4388 enum decl_context context
4389 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4390 attrs
= type_specifiers
->attributes
;
4391 type_specifiers
->attributes
= NULL_TREE
;
4392 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4393 if (attrs
&& type
!= error_mark_node
)
4395 if (CLASS_TYPE_P (type
))
4396 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4397 "outside of definition", type
);
4398 else if (MAYBE_CLASS_TYPE_P (type
))
4399 /* A template type parameter or other dependent type. */
4400 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4401 "type %qT without an associated declaration", type
);
4403 cplus_decl_attributes (&type
, attrs
, 0);
4408 /* Process a DECLARATOR for a function-scope variable declaration,
4409 namespace-scope variable declaration, or function declaration.
4410 (Function definitions go through start_function; class member
4411 declarations appearing in the body of the class go through
4412 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4413 If an error occurs, the error_mark_node is returned instead.
4415 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4416 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4417 for an explicitly defaulted function, or SD_DELETED for an explicitly
4418 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4419 implicitly initialized via a default constructor. ATTRIBUTES and
4420 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4422 The scope represented by the context of the returned DECL is pushed
4423 (if it is not the global namespace) and is assigned to
4424 *PUSHED_SCOPE_P. The caller is then responsible for calling
4425 pop_scope on *PUSHED_SCOPE_P if it is set. */
4428 start_decl (const cp_declarator
*declarator
,
4429 cp_decl_specifier_seq
*declspecs
,
4432 tree prefix_attributes
,
4433 tree
*pushed_scope_p
)
4441 *pushed_scope_p
= NULL_TREE
;
4443 /* An object declared as __attribute__((deprecated)) suppresses
4444 warnings of uses of other deprecated items. */
4445 if (lookup_attribute ("deprecated", attributes
))
4446 deprecated_state
= DEPRECATED_SUPPRESS
;
4448 attributes
= chainon (attributes
, prefix_attributes
);
4450 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4453 deprecated_state
= DEPRECATED_NORMAL
;
4455 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4456 || decl
== error_mark_node
)
4457 return error_mark_node
;
4459 context
= CP_DECL_CONTEXT (decl
);
4460 if (context
!= global_namespace
)
4461 *pushed_scope_p
= push_scope (context
);
4464 /* Is it valid for this decl to have an initializer at all?
4465 If not, set INITIALIZED to zero, which will indirectly
4466 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4467 switch (TREE_CODE (decl
))
4470 error ("typedef %qD is initialized (use decltype instead)", decl
);
4471 return error_mark_node
;
4474 if (initialized
== SD_DELETED
)
4475 /* We'll handle the rest of the semantics later, but we need to
4476 set this now so it's visible to duplicate_decls. */
4477 DECL_DELETED_FN (decl
) = 1;
4486 if (! toplevel_bindings_p ()
4487 && DECL_EXTERNAL (decl
))
4488 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4490 DECL_EXTERNAL (decl
) = 0;
4491 if (toplevel_bindings_p ())
4492 TREE_STATIC (decl
) = 1;
4494 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4496 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4497 record_key_method_defined (decl
);
4499 /* If this is a typedef that names the class for linkage purposes
4500 (7.1.3p8), apply any attributes directly to the type. */
4501 if (TREE_CODE (decl
) == TYPE_DECL
4502 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4503 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4504 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4508 /* Set attributes here so if duplicate decl, will have proper attributes. */
4509 cplus_decl_attributes (&decl
, attributes
, flags
);
4511 /* Dllimported symbols cannot be defined. Static data members (which
4512 can be initialized in-class and dllimported) go through grokfield,
4513 not here, so we don't need to exclude those decls when checking for
4515 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4517 error ("definition of %q#D is marked %<dllimport%>", decl
);
4518 DECL_DLLIMPORT_P (decl
) = 0;
4521 /* If #pragma weak was used, mark the decl weak now. */
4522 if (!processing_template_decl
)
4523 maybe_apply_pragma_weak (decl
);
4525 if (TREE_CODE (decl
) == FUNCTION_DECL
4526 && DECL_DECLARED_INLINE_P (decl
)
4527 && DECL_UNINLINABLE (decl
)
4528 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4529 warning (0, "inline function %q+D given attribute noinline", decl
);
4531 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4533 if (TREE_CODE (decl
) == VAR_DECL
)
4535 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4536 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4537 error ("%q#D is not a static member of %q#T", decl
, context
);
4540 if (DECL_CONTEXT (field
) != context
)
4542 if (!same_type_p (DECL_CONTEXT (field
), context
))
4543 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4544 "to be defined as %<%T::%D%>",
4545 DECL_CONTEXT (field
), DECL_NAME (decl
),
4546 context
, DECL_NAME (decl
));
4547 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4549 /* Static data member are tricky; an in-class initialization
4550 still doesn't provide a definition, so the in-class
4551 declaration will have DECL_EXTERNAL set, but will have an
4552 initialization. Thus, duplicate_decls won't warn
4553 about this situation, and so we check here. */
4554 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4555 error ("duplicate initialization of %qD", decl
);
4556 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4558 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4559 && !DECL_DECLARED_CONSTEXPR_P (field
))
4560 error ("%qD declared %<constexpr%> outside its class", field
);
4565 tree field
= check_classfn (context
, decl
,
4566 (processing_template_decl
4567 > template_class_depth (context
))
4568 ? current_template_parms
4570 if (field
&& field
!= error_mark_node
4571 && duplicate_decls (decl
, field
,
4572 /*newdecl_is_friend=*/false))
4576 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4577 DECL_IN_AGGR_P (decl
) = 0;
4578 /* Do not mark DECL as an explicit specialization if it was not
4579 already marked as an instantiation; a declaration should
4580 never be marked as a specialization unless we know what
4581 template is being specialized. */
4582 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4584 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4586 /* [temp.expl.spec] An explicit specialization of a static data
4587 member of a template is a definition if the declaration
4588 includes an initializer; otherwise, it is a declaration.
4590 We check for processing_specialization so this only applies
4591 to the new specialization syntax. */
4592 if (!initialized
&& processing_specialization
)
4593 DECL_EXTERNAL (decl
) = 1;
4596 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4597 /* Aliases are definitions. */
4599 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4603 was_public
= TREE_PUBLIC (decl
);
4605 /* Enter this declaration into the symbol table. */
4606 decl
= maybe_push_decl (decl
);
4608 if (processing_template_decl
)
4609 decl
= push_template_decl (decl
);
4610 if (decl
== error_mark_node
)
4611 return error_mark_node
;
4613 if (TREE_CODE (decl
) == VAR_DECL
4614 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4615 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4617 /* This is a const variable with implicit 'static'. Set
4618 DECL_THIS_STATIC so we can tell it from variables that are
4619 !TREE_PUBLIC because of the anonymous namespace. */
4620 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4621 DECL_THIS_STATIC (decl
) = 1;
4624 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4625 start_decl_1 (decl
, initialized
);
4630 /* Process the declaration of a variable DECL. INITIALIZED is true
4631 iff DECL is explicitly initialized. (INITIALIZED is false if the
4632 variable is initialized via an implicitly-called constructor.)
4633 This function must be called for ordinary variables (including, for
4634 example, implicit instantiations of templates), but must not be
4635 called for template declarations. */
4638 start_decl_1 (tree decl
, bool initialized
)
4642 bool aggregate_definition_p
;
4644 gcc_assert (!processing_template_decl
);
4646 if (error_operand_p (decl
))
4649 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4651 type
= TREE_TYPE (decl
);
4652 complete_p
= COMPLETE_TYPE_P (type
);
4653 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4655 /* If an explicit initializer is present, or if this is a definition
4656 of an aggregate, then we need a complete type at this point.
4657 (Scalars are always complete types, so there is nothing to
4658 check.) This code just sets COMPLETE_P; errors (if necessary)
4659 are issued below. */
4660 if ((initialized
|| aggregate_definition_p
)
4662 && COMPLETE_TYPE_P (complete_type (type
)))
4665 /* We will not yet have set TREE_READONLY on DECL if the type
4666 was "const", but incomplete, before this point. But, now, we
4667 have a complete type, so we can try again. */
4668 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4672 /* Is it valid for this decl to have an initializer at all? */
4674 /* Don't allow initializations for incomplete types except for
4675 arrays which might be completed by the initialization. */
4677 ; /* A complete type is ok. */
4678 else if (type_uses_auto (type
))
4679 ; /* An auto type is ok. */
4680 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4682 error ("variable %q#D has initializer but incomplete type", decl
);
4683 type
= TREE_TYPE (decl
) = error_mark_node
;
4685 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4687 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4688 error ("elements of array %q#D have incomplete type", decl
);
4689 /* else we already gave an error in start_decl. */
4692 else if (aggregate_definition_p
&& !complete_p
)
4694 if (type_uses_auto (type
))
4695 error ("declaration of %q#D has no initializer", decl
);
4697 error ("aggregate %q#D has incomplete type and cannot be defined",
4699 /* Change the type so that assemble_variable will give
4700 DECL an rtl we can live with: (mem (const_int 0)). */
4701 type
= TREE_TYPE (decl
) = error_mark_node
;
4704 /* Create a new scope to hold this declaration if necessary.
4705 Whether or not a new scope is necessary cannot be determined
4706 until after the type has been completed; if the type is a
4707 specialization of a class template it is not until after
4708 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4709 will be set correctly. */
4710 maybe_push_cleanup_level (type
);
4713 /* Handle initialization of references. DECL, TYPE, and INIT have the
4714 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4715 but will be set to a new CLEANUP_STMT if a temporary is created
4716 that must be destroyed subsequently.
4718 Returns an initializer expression to use to initialize DECL, or
4719 NULL if the initialization can be performed statically.
4721 Quotes on semantics can be found in ARM 8.4.3. */
4724 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4726 if (init
== NULL_TREE
)
4728 if ((DECL_LANG_SPECIFIC (decl
) == 0
4729 || DECL_IN_AGGR_P (decl
) == 0)
4730 && ! DECL_THIS_EXTERN (decl
))
4731 error ("%qD declared as reference but not initialized", decl
);
4735 if (TREE_CODE (init
) == TREE_LIST
)
4736 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4737 tf_warning_or_error
);
4739 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4740 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4741 /* Note: default conversion is only called in very special cases. */
4742 init
= decay_conversion (init
, tf_warning_or_error
);
4744 /* Convert INIT to the reference type TYPE. This may involve the
4745 creation of a temporary, whose lifetime must be the same as that
4746 of the reference. If so, a DECL_EXPR for the temporary will be
4747 added just after the DECL_EXPR for DECL. That's why we don't set
4748 DECL_INITIAL for local references (instead assigning to them
4749 explicitly); we need to allow the temporary to be initialized
4751 return initialize_reference (type
, init
, flags
,
4752 tf_warning_or_error
);
4755 /* Designated initializers in arrays are not supported in GNU C++.
4756 The parser cannot detect this error since it does not know whether
4757 a given brace-enclosed initializer is for a class type or for an
4758 array. This function checks that CE does not use a designated
4759 initializer. If it does, an error is issued. Returns true if CE
4760 is valid, i.e., does not have a designated initializer. */
4763 check_array_designated_initializer (const constructor_elt
*ce
,
4764 unsigned HOST_WIDE_INT index
)
4766 /* Designated initializers for array elements are not supported. */
4769 /* The parser only allows identifiers as designated
4771 if (ce
->index
== error_mark_node
)
4772 error ("name used in a GNU-style designated "
4773 "initializer for an array");
4774 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4776 /* A C99 designator is OK if it matches the current index. */
4777 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4780 sorry ("non-trivial designated initializers not supported");
4784 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4785 error ("name %qD used in a GNU-style designated "
4786 "initializer for an array", ce
->index
);
4794 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4795 array until we finish parsing the initializer. If that's the
4796 situation we're in, update DECL accordingly. */
4799 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4801 tree type
= TREE_TYPE (decl
);
4803 if (TREE_CODE (type
) == ARRAY_TYPE
4804 && TYPE_DOMAIN (type
) == NULL_TREE
4805 && TREE_CODE (decl
) != TYPE_DECL
)
4807 /* do_default is really a C-ism to deal with tentative definitions.
4808 But let's leave it here to ease the eventual merge. */
4809 int do_default
= !DECL_EXTERNAL (decl
);
4810 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4813 /* Check that there are no designated initializers in INIT, as
4814 those are not supported in GNU C++, and as the middle-end
4815 will crash if presented with a non-numeric designated
4817 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4819 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4820 constructor_elt
*ce
;
4822 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4823 if (!check_array_designated_initializer (ce
, i
))
4829 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4833 error ("initializer fails to determine size of %qD", decl
);
4835 else if (failure
== 2)
4839 error ("array size missing in %qD", decl
);
4841 /* If a `static' var's size isn't known, make it extern as
4842 well as static, so it does not get allocated. If it's not
4843 `static', then don't mark it extern; finish_incomplete_decl
4844 will give it a default size and it will get allocated. */
4845 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4846 DECL_EXTERNAL (decl
) = 1;
4848 else if (failure
== 3)
4850 error ("zero-size array %qD", decl
);
4854 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4856 relayout_decl (decl
);
4860 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4861 any appropriate error messages regarding the layout. */
4864 layout_var_decl (tree decl
)
4868 type
= TREE_TYPE (decl
);
4869 if (type
== error_mark_node
)
4872 /* If we haven't already layed out this declaration, do so now.
4873 Note that we must not call complete type for an external object
4874 because it's type might involve templates that we are not
4875 supposed to instantiate yet. (And it's perfectly valid to say
4876 `extern X x' for some incomplete type `X'.) */
4877 if (!DECL_EXTERNAL (decl
))
4878 complete_type (type
);
4879 if (!DECL_SIZE (decl
)
4880 && TREE_TYPE (decl
) != error_mark_node
4881 && (COMPLETE_TYPE_P (type
)
4882 || (TREE_CODE (type
) == ARRAY_TYPE
4883 && !TYPE_DOMAIN (type
)
4884 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4885 layout_decl (decl
, 0);
4887 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4889 /* An automatic variable with an incomplete type: that is an error.
4890 Don't talk about array types here, since we took care of that
4891 message in grokdeclarator. */
4892 error ("storage size of %qD isn%'t known", decl
);
4893 TREE_TYPE (decl
) = error_mark_node
;
4896 /* Keep this code around in case we later want to control debug info
4897 based on whether a type is "used". (jason 1999-11-11) */
4899 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4900 /* Let debugger know it should output info for this type. */
4901 note_debug_info_needed (ttype
);
4903 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4904 note_debug_info_needed (DECL_CONTEXT (decl
));
4907 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4908 && DECL_SIZE (decl
) != NULL_TREE
4909 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4911 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4912 constant_expression_warning (DECL_SIZE (decl
));
4915 error ("storage size of %qD isn%'t constant", decl
);
4916 TREE_TYPE (decl
) = error_mark_node
;
4921 /* If a local static variable is declared in an inline function, or if
4922 we have a weak definition, we must endeavor to create only one
4923 instance of the variable at link-time. */
4926 maybe_commonize_var (tree decl
)
4928 /* Static data in a function with comdat linkage also has comdat
4930 if (TREE_STATIC (decl
)
4931 /* Don't mess with __FUNCTION__. */
4932 && ! DECL_ARTIFICIAL (decl
)
4933 && DECL_FUNCTION_SCOPE_P (decl
)
4934 && vague_linkage_p (DECL_CONTEXT (decl
)))
4938 /* With weak symbols, we simply make the variable COMDAT;
4939 that will cause copies in multiple translations units to
4941 comdat_linkage (decl
);
4945 if (DECL_INITIAL (decl
) == NULL_TREE
4946 || DECL_INITIAL (decl
) == error_mark_node
)
4948 /* Without weak symbols, we can use COMMON to merge
4949 uninitialized variables. */
4950 TREE_PUBLIC (decl
) = 1;
4951 DECL_COMMON (decl
) = 1;
4955 /* While for initialized variables, we must use internal
4956 linkage -- which means that multiple copies will not
4958 TREE_PUBLIC (decl
) = 0;
4959 DECL_COMMON (decl
) = 0;
4960 warning_at (input_location
, 0,
4961 "sorry: semantics of inline function static "
4962 "data %q+#D are wrong (you%'ll wind up "
4963 "with multiple copies)", decl
);
4964 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4965 " you can work around this by removing "
4970 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4971 /* Set it up again; we might have set DECL_INITIAL since the last
4973 comdat_linkage (decl
);
4976 /* Issue an error message if DECL is an uninitialized const variable. */
4979 check_for_uninitialized_const_var (tree decl
)
4981 tree type
= strip_array_types (TREE_TYPE (decl
));
4983 /* ``Unless explicitly declared extern, a const object does not have
4984 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4986 if (TREE_CODE (decl
) == VAR_DECL
4987 && TREE_CODE (type
) != REFERENCE_TYPE
4988 && CP_TYPE_CONST_P (type
)
4989 && !DECL_INITIAL (decl
))
4991 tree field
= default_init_uninitialized_part (type
);
4995 permerror (DECL_SOURCE_LOCATION (decl
),
4996 "uninitialized const %qD", decl
);
4998 if (CLASS_TYPE_P (type
))
5000 tree defaulted_ctor
;
5002 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5003 "%q#T has no user-provided default constructor", type
);
5004 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5006 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5007 "constructor is not user-provided because it is "
5008 "explicitly defaulted in the class body");
5009 inform (0, "and the implicitly-defined constructor does not "
5010 "initialize %q+#D", field
);
5015 /* Structure holding the current initializer being processed by reshape_init.
5016 CUR is a pointer to the current element being processed, END is a pointer
5017 after the last element present in the initializer. */
5018 typedef struct reshape_iterator_t
5020 constructor_elt
*cur
;
5021 constructor_elt
*end
;
5024 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5026 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5027 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5028 initialized. If there are no more such fields, the return value
5032 next_initializable_field (tree field
)
5035 && (TREE_CODE (field
) != FIELD_DECL
5036 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5037 || DECL_ARTIFICIAL (field
)))
5038 field
= DECL_CHAIN (field
);
5043 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5044 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5045 INTEGER_CST representing the size of the array minus one (the maximum index),
5046 or NULL_TREE if the array was declared without specifying the size. D is
5047 the iterator within the constructor. */
5050 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5051 tsubst_flags_t complain
)
5054 bool sized_array_p
= (max_index
!= NULL_TREE
);
5055 unsigned HOST_WIDE_INT max_index_cst
= 0;
5056 unsigned HOST_WIDE_INT index
;
5058 /* The initializer for an array is always a CONSTRUCTOR. */
5059 new_init
= build_constructor (init_list_type_node
, NULL
);
5063 /* Minus 1 is used for zero sized arrays. */
5064 if (integer_all_onesp (max_index
))
5067 if (host_integerp (max_index
, 1))
5068 max_index_cst
= tree_low_cst (max_index
, 1);
5069 /* sizetype is sign extended, not zero extended. */
5071 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5075 /* Loop until there are no more initializers. */
5077 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5081 constructor_elt
*old_cur
= d
->cur
;
5083 check_array_designated_initializer (d
->cur
, index
);
5084 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5086 if (elt_init
== error_mark_node
)
5087 return error_mark_node
;
5088 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5089 size_int (index
), elt_init
);
5090 if (!TREE_CONSTANT (elt_init
))
5091 TREE_CONSTANT (new_init
) = false;
5093 /* This can happen with an invalid initializer (c++/54501). */
5094 if (d
->cur
== old_cur
&& !sized_array_p
)
5101 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5102 Parameters are the same of reshape_init_r. */
5105 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5107 tree max_index
= NULL_TREE
;
5109 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5111 if (TYPE_DOMAIN (type
))
5112 max_index
= array_type_nelts (type
);
5114 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5117 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5118 Parameters are the same of reshape_init_r. */
5121 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5123 tree max_index
= NULL_TREE
;
5125 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5127 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5129 tree value
= d
->cur
->value
;
5130 if (!same_type_p (TREE_TYPE (value
), type
))
5132 if (complain
& tf_error
)
5133 error ("invalid type %qT as initializer for a vector of type %qT",
5134 TREE_TYPE (d
->cur
->value
), type
);
5135 value
= error_mark_node
;
5141 /* For a vector, we initialize it as an array of the appropriate size. */
5142 if (TREE_CODE (type
) == VECTOR_TYPE
)
5143 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5145 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5148 /* Subroutine of reshape_init_r, processes the initializers for classes
5149 or union. Parameters are the same of reshape_init_r. */
5152 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5153 tsubst_flags_t complain
)
5158 gcc_assert (CLASS_TYPE_P (type
));
5160 /* The initializer for a class is always a CONSTRUCTOR. */
5161 new_init
= build_constructor (init_list_type_node
, NULL
);
5162 field
= next_initializable_field (TYPE_FIELDS (type
));
5168 An initializer for an aggregate member that is an
5169 empty class shall have the form of an empty
5170 initializer-list {}. */
5171 if (!first_initializer_p
)
5173 if (complain
& tf_error
)
5174 error ("initializer for %qT must be brace-enclosed", type
);
5175 return error_mark_node
;
5180 /* Loop through the initializable fields, gathering initializers. */
5181 while (d
->cur
!= d
->end
)
5184 constructor_elt
*old_cur
= d
->cur
;
5186 /* Handle designated initializers, as an extension. */
5189 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5191 if (complain
& tf_error
)
5192 error ("%<[%E] =%> used in a GNU-style designated initializer"
5193 " for class %qT", d
->cur
->index
, type
);
5194 return error_mark_node
;
5197 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5198 /* We already reshaped this. */
5199 gcc_assert (d
->cur
->index
== field
);
5201 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5203 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5205 if (complain
& tf_error
)
5206 error ("%qT has no non-static data member named %qD", type
,
5208 return error_mark_node
;
5212 /* If we processed all the member of the class, we are done. */
5216 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5217 /*first_initializer_p=*/false, complain
);
5218 if (field_init
== error_mark_node
)
5219 return error_mark_node
;
5221 if (d
->cur
== old_cur
&& d
->cur
->index
)
5223 /* This can happen with an invalid initializer for a flexible
5224 array member (c++/54441). */
5225 if (complain
& tf_error
)
5226 error ("invalid initializer for %q#D", field
);
5227 return error_mark_node
;
5230 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5234 When a union is initialized with a brace-enclosed
5235 initializer, the braces shall only contain an
5236 initializer for the first member of the union. */
5237 if (TREE_CODE (type
) == UNION_TYPE
)
5240 field
= next_initializable_field (DECL_CHAIN (field
));
5246 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5247 designators are not valid; either complain or return true to indicate
5248 that reshape_init_r should return error_mark_node. */
5251 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5255 if (complain
& tf_error
)
5256 error ("C99 designator %qE outside aggregate initializer",
5264 /* Subroutine of reshape_init, which processes a single initializer (part of
5265 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5266 iterator within the CONSTRUCTOR which points to the initializer to process.
5267 FIRST_INITIALIZER_P is true if this is the first initializer of the
5268 outermost CONSTRUCTOR node. */
5271 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5272 tsubst_flags_t complain
)
5274 tree init
= d
->cur
->value
;
5276 if (error_operand_p (init
))
5277 return error_mark_node
;
5279 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5280 && has_designator_problem (d
, complain
))
5281 return error_mark_node
;
5283 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5285 /* A complex type can be initialized from one or two initializers,
5286 but braces are not elided. */
5288 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5290 if (CONSTRUCTOR_NELTS (init
) > 2)
5292 if (complain
& tf_error
)
5293 error ("too many initializers for %qT", type
);
5295 return error_mark_node
;
5298 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5300 vec
<constructor_elt
, va_gc
> *v
= 0;
5301 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5302 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5303 if (has_designator_problem (d
, complain
))
5304 return error_mark_node
;
5306 init
= build_constructor (init_list_type_node
, v
);
5311 /* A non-aggregate type is always initialized with a single
5313 if (!CP_AGGREGATE_TYPE_P (type
))
5315 /* It is invalid to initialize a non-aggregate type with a
5316 brace-enclosed initializer before C++0x.
5317 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5318 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5319 a CONSTRUCTOR (with a record type). */
5320 if (TREE_CODE (init
) == CONSTRUCTOR
5321 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5323 if (SCALAR_TYPE_P (type
))
5325 if (complain
& tf_error
)
5326 error ("braces around scalar initializer for type %qT", type
);
5327 init
= error_mark_node
;
5330 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5339 All implicit type conversions (clause _conv_) are considered when
5340 initializing the aggregate member with an initializer from an
5341 initializer-list. If the initializer can initialize a member,
5342 the member is initialized. Otherwise, if the member is itself a
5343 non-empty subaggregate, brace elision is assumed and the
5344 initializer is considered for the initialization of the first
5345 member of the subaggregate. */
5346 if (TREE_CODE (init
) != CONSTRUCTOR
5347 /* But don't try this for the first initializer, since that would be
5348 looking through the outermost braces; A a2 = { a1 }; is not a
5349 valid aggregate initialization. */
5350 && !first_initializer_p
5351 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5352 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5359 /* [dcl.init.string]
5361 A char array (whether plain char, signed char, or unsigned char)
5362 can be initialized by a string-literal (optionally enclosed in
5363 braces); a wchar_t array can be initialized by a wide
5364 string-literal (optionally enclosed in braces). */
5365 if (TREE_CODE (type
) == ARRAY_TYPE
5366 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5368 tree str_init
= init
;
5370 /* Strip one level of braces if and only if they enclose a single
5371 element (as allowed by [dcl.init.string]). */
5372 if (!first_initializer_p
5373 && TREE_CODE (str_init
) == CONSTRUCTOR
5374 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5376 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5379 /* If it's a string literal, then it's the initializer for the array
5380 as a whole. Otherwise, continue with normal initialization for
5381 array types (one value per array element). */
5382 if (TREE_CODE (str_init
) == STRING_CST
)
5384 if (has_designator_problem (d
, complain
))
5385 return error_mark_node
;
5391 /* The following cases are about aggregates. If we are not within a full
5392 initializer already, and there is not a CONSTRUCTOR, it means that there
5393 is a missing set of braces (that is, we are processing the case for
5394 which reshape_init exists). */
5395 if (!first_initializer_p
)
5397 if (TREE_CODE (init
) == CONSTRUCTOR
)
5399 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5400 /* There is no need to reshape pointer-to-member function
5401 initializers, as they are always constructed correctly
5402 by the front end. */
5404 else if (COMPOUND_LITERAL_P (init
))
5405 /* For a nested compound literal, there is no need to reshape since
5406 brace elision is not allowed. Even if we decided to allow it,
5407 we should add a call to reshape_init in finish_compound_literal,
5408 before calling digest_init, so changing this code would still
5409 not be necessary. */
5410 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5414 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5415 return reshape_init (type
, init
, complain
);
5419 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5423 /* Dispatch to specialized routines. */
5424 if (CLASS_TYPE_P (type
))
5425 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5426 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5427 return reshape_init_array (type
, d
, complain
);
5428 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5429 return reshape_init_vector (type
, d
, complain
);
5434 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5435 brace-enclosed aggregate initializer.
5437 INIT is the CONSTRUCTOR containing the list of initializers describing
5438 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5439 It may not presently match the shape of the TYPE; for example:
5441 struct S { int a; int b; };
5442 struct S a[] = { 1, 2, 3, 4 };
5444 Here INIT will hold a vector of four elements, rather than a
5445 vector of two elements, each itself a vector of two elements. This
5446 routine transforms INIT from the former form into the latter. The
5447 revised CONSTRUCTOR node is returned. */
5450 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5452 vec
<constructor_elt
, va_gc
> *v
;
5456 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5458 v
= CONSTRUCTOR_ELTS (init
);
5460 /* An empty constructor does not need reshaping, and it is always a valid
5462 if (vec_safe_is_empty (v
))
5465 /* Recurse on this CONSTRUCTOR. */
5467 d
.end
= d
.cur
+ v
->length ();
5469 new_init
= reshape_init_r (type
, &d
, true, complain
);
5470 if (new_init
== error_mark_node
)
5471 return error_mark_node
;
5473 /* Make sure all the element of the constructor were used. Otherwise,
5474 issue an error about exceeding initializers. */
5477 if (complain
& tf_error
)
5478 error ("too many initializers for %qT", type
);
5480 return error_mark_node
;
5486 /* Verify array initializer. Returns true if errors have been reported. */
5489 check_array_initializer (tree decl
, tree type
, tree init
)
5491 tree element_type
= TREE_TYPE (type
);
5493 /* The array type itself need not be complete, because the
5494 initializer may tell us how many elements are in the array.
5495 But, the elements of the array must be complete. */
5496 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5499 error ("elements of array %q#D have incomplete type", decl
);
5501 error ("elements of array %q#T have incomplete type", type
);
5504 /* It is not valid to initialize a VLA. */
5506 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5507 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5510 error ("variable-sized object %qD may not be initialized", decl
);
5512 error ("variable-sized compound literal");
5518 /* Subroutine of check_initializer; args are passed down from that function.
5519 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5522 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5525 gcc_assert (stmts_are_full_exprs_p ());
5526 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5529 /* Verify INIT (the initializer for DECL), and record the
5530 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5531 grok_reference_init.
5533 If the return value is non-NULL, it is an expression that must be
5534 evaluated dynamically to initialize DECL. */
5537 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5539 tree type
= TREE_TYPE (decl
);
5540 tree init_code
= NULL
;
5541 tree extra_init
= NULL_TREE
;
5544 /* Things that are going to be initialized need to have complete
5546 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5548 if (DECL_HAS_VALUE_EXPR_P (decl
))
5550 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5551 it doesn't have storage to be initialized. */
5552 gcc_assert (init
== NULL_TREE
);
5556 if (type
== error_mark_node
)
5557 /* We will have already complained. */
5560 if (TREE_CODE (type
) == ARRAY_TYPE
)
5562 if (check_array_initializer (decl
, type
, init
))
5565 else if (!COMPLETE_TYPE_P (type
))
5567 error ("%q#D has incomplete type", decl
);
5568 TREE_TYPE (decl
) = error_mark_node
;
5572 /* There is no way to make a variable-sized class type in GNU C++. */
5573 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5575 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5577 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5578 if (SCALAR_TYPE_P (type
))
5582 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5583 init
= build_zero_init (type
, NULL_TREE
, false);
5585 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5587 error ("scalar object %qD requires one element in initializer",
5589 TREE_TYPE (decl
) = error_mark_node
;
5595 if (TREE_CODE (decl
) == CONST_DECL
)
5597 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5599 DECL_INITIAL (decl
) = init
;
5601 gcc_assert (init
!= NULL_TREE
);
5604 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5606 else if (init
|| type_build_ctor_call (type
)
5607 || TREE_CODE (type
) == REFERENCE_TYPE
)
5609 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5611 init
= grok_reference_init (decl
, type
, init
, flags
);
5612 flags
|= LOOKUP_ALREADY_DIGESTED
;
5615 check_for_uninitialized_const_var (decl
);
5616 /* Do not reshape constructors of vectors (they don't need to be
5618 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5620 if (is_std_init_list (type
))
5622 init
= perform_implicit_conversion (type
, init
,
5623 tf_warning_or_error
);
5624 flags
|= LOOKUP_ALREADY_DIGESTED
;
5626 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5628 /* Don't reshape if the class has constructors. */
5629 if (cxx_dialect
== cxx98
)
5630 error ("in C++98 %qD must be initialized by constructor, "
5634 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5636 error ("opaque vector types cannot be initialized");
5637 init
= error_mark_node
;
5641 init
= reshape_init (type
, init
, tf_warning_or_error
);
5642 if (SCALAR_TYPE_P (type
))
5643 check_narrowing (type
, init
);
5647 /* If DECL has an array type without a specific bound, deduce the
5648 array size from the initializer. */
5649 maybe_deduce_size_from_array_init (decl
, init
);
5650 type
= TREE_TYPE (decl
);
5651 if (type
== error_mark_node
)
5654 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5655 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5656 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5657 && CP_AGGREGATE_TYPE_P (type
)
5658 && (CLASS_TYPE_P (type
)
5659 || type_has_extended_temps (type
))))
5661 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5663 /* A constructor call is a non-trivial initializer even if
5664 it isn't explicitly written. */
5665 if (TREE_SIDE_EFFECTS (init_code
))
5666 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5668 /* If this is a constexpr initializer, expand_default_init will
5669 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5670 case, pull the initializer back out and pass it down into
5671 store_init_value. */
5672 while (TREE_CODE (init_code
) == EXPR_STMT
5673 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5674 init_code
= TREE_OPERAND (init_code
, 0);
5675 if (TREE_CODE (init_code
) == INIT_EXPR
)
5677 init
= TREE_OPERAND (init_code
, 1);
5678 init_code
= NULL_TREE
;
5679 /* Don't call digest_init; it's unnecessary and will complain
5680 about aggregate initialization of non-aggregate classes. */
5681 flags
|= LOOKUP_ALREADY_DIGESTED
;
5683 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5685 /* Declared constexpr, but no suitable initializer; massage
5686 init appropriately so we can pass it into store_init_value
5688 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5689 init
= finish_compound_literal (type
, init
,
5690 tf_warning_or_error
);
5691 else if (CLASS_TYPE_P (type
)
5692 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5694 init
= build_functional_cast (type
, init
, tf_none
);
5695 if (TREE_CODE (init
) == TARGET_EXPR
)
5696 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5698 init_code
= NULL_TREE
;
5704 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5706 /* In aggregate initialization of a variable, each element
5707 initialization is a full-expression because there is no
5708 enclosing expression. */
5709 gcc_assert (stmts_are_full_exprs_p ());
5711 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5713 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5714 && DECL_INITIAL (decl
)
5715 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5716 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5717 warning (0, "array %qD initialized by parenthesized string literal %qE",
5718 decl
, DECL_INITIAL (decl
));
5724 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5725 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5726 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5727 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5730 check_for_uninitialized_const_var (decl
);
5733 if (init
&& init
!= error_mark_node
)
5734 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5737 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5739 if (init_code
&& DECL_IN_AGGR_P (decl
))
5741 static int explained
= 0;
5743 if (cxx_dialect
< cxx0x
)
5744 error ("initializer invalid for static member with constructor");
5746 error ("non-constant in-class initialization invalid for static "
5747 "member %qD", decl
);
5750 error ("(an out of class initialization is required)");
5758 /* If DECL is not a local variable, give it RTL. */
5761 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5763 int toplev
= toplevel_bindings_p ();
5765 const char *filename
;
5767 /* Set the DECL_ASSEMBLER_NAME for the object. */
5770 /* The `register' keyword, when used together with an
5771 asm-specification, indicates that the variable should be
5772 placed in a particular register. */
5773 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5775 set_user_assembler_name (decl
, asmspec
);
5776 DECL_HARD_REGISTER (decl
) = 1;
5780 if (TREE_CODE (decl
) == FUNCTION_DECL
5781 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5782 set_builtin_user_assembler_name (decl
, asmspec
);
5783 set_user_assembler_name (decl
, asmspec
);
5787 /* Handle non-variables up front. */
5788 if (TREE_CODE (decl
) != VAR_DECL
)
5790 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5794 /* If we see a class member here, it should be a static data
5796 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5798 gcc_assert (TREE_STATIC (decl
));
5799 /* An in-class declaration of a static data member should be
5800 external; it is only a declaration, and not a definition. */
5801 if (init
== NULL_TREE
)
5802 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5805 /* We don't create any RTL for local variables. */
5806 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5809 /* We defer emission of local statics until the corresponding
5810 DECL_EXPR is expanded. */
5811 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5813 /* We try to defer namespace-scope static constants so that they are
5814 not emitted into the object file unnecessarily. */
5815 filename
= input_filename
;
5816 if (!DECL_VIRTUAL_P (decl
)
5817 && TREE_READONLY (decl
)
5818 && DECL_INITIAL (decl
) != NULL_TREE
5819 && DECL_INITIAL (decl
) != error_mark_node
5821 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5823 && !TREE_PUBLIC (decl
))
5825 /* Fool with the linkage of static consts according to #pragma
5827 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5828 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5830 TREE_PUBLIC (decl
) = 1;
5831 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5836 /* Likewise for template instantiations. */
5837 else if (DECL_LANG_SPECIFIC (decl
)
5838 && DECL_IMPLICIT_INSTANTIATION (decl
))
5841 /* If we're not deferring, go ahead and assemble the variable. */
5843 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5846 /* walk_tree helper for wrap_temporary_cleanups, below. */
5849 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5851 /* Stop at types or full-expression boundaries. */
5852 if (TYPE_P (*stmt_p
)
5853 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5859 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5861 tree guard
= (tree
)data
;
5862 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5864 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5865 /* Tell honor_protect_cleanup_actions to handle this as a separate
5867 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5869 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5875 /* We're initializing a local variable which has a cleanup GUARD. If there
5876 are any temporaries used in the initializer INIT of this variable, we
5877 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5878 variable will be cleaned up properly if one of them throws.
5880 Unfortunately, there's no way to express this properly in terms of
5881 nesting, as the regions for the temporaries overlap the region for the
5882 variable itself; if there are two temporaries, the variable needs to be
5883 the first thing destroyed if either of them throws. However, we only
5884 want to run the variable's cleanup if it actually got constructed. So
5885 we need to guard the temporary cleanups with the variable's cleanup if
5886 they are run on the normal path, but not if they are run on the
5887 exceptional path. We implement this by telling
5888 honor_protect_cleanup_actions to strip the variable cleanup from the
5889 exceptional path. */
5892 wrap_temporary_cleanups (tree init
, tree guard
)
5894 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5897 /* Generate code to initialize DECL (a local variable). */
5900 initialize_local_var (tree decl
, tree init
)
5902 tree type
= TREE_TYPE (decl
);
5906 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5907 || TREE_CODE (decl
) == RESULT_DECL
);
5908 gcc_assert (!TREE_STATIC (decl
));
5910 if (DECL_SIZE (decl
) == NULL_TREE
)
5912 /* If we used it already as memory, it must stay in memory. */
5913 DECL_INITIAL (decl
) = NULL_TREE
;
5914 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5918 if (type
== error_mark_node
)
5921 /* Compute and store the initial value. */
5922 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5923 if (TREE_USED (type
))
5924 DECL_READ_P (decl
) = 1;
5926 /* Generate a cleanup, if necessary. */
5927 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5929 /* Perform the initialization. */
5932 if (TREE_CODE (init
) == INIT_EXPR
5933 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5935 /* Stick simple initializers in DECL_INITIAL so that
5936 -Wno-init-self works (c++/34772). */
5937 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5938 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5942 int saved_stmts_are_full_exprs_p
;
5944 /* If we're only initializing a single object, guard the
5945 destructors of any temporaries used in its initializer with
5946 its destructor. This isn't right for arrays because each
5947 element initialization is a full-expression. */
5948 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5949 wrap_temporary_cleanups (init
, cleanup
);
5951 gcc_assert (building_stmt_list_p ());
5952 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5953 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5954 finish_expr_stmt (init
);
5955 current_stmt_tree ()->stmts_are_full_exprs_p
=
5956 saved_stmts_are_full_exprs_p
;
5960 /* Set this to 0 so we can tell whether an aggregate which was
5961 initialized was ever used. Don't do this if it has a
5962 destructor, so we don't complain about the 'resource
5963 allocation is initialization' idiom. Now set
5964 attribute((unused)) on types so decls of that type will be
5965 marked used. (see TREE_USED, above.) */
5966 if (TYPE_NEEDS_CONSTRUCTING (type
)
5968 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5969 && DECL_NAME (decl
))
5970 TREE_USED (decl
) = 0;
5971 else if (already_used
)
5972 TREE_USED (decl
) = 1;
5975 finish_decl_cleanup (decl
, cleanup
);
5978 /* DECL is a VAR_DECL for a compiler-generated variable with static
5979 storage duration (like a virtual table) whose initializer is a
5980 compile-time constant. Initialize the variable and provide it to the
5984 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
5987 gcc_assert (DECL_ARTIFICIAL (decl
));
5988 init
= build_constructor (TREE_TYPE (decl
), v
);
5989 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5990 DECL_INITIAL (decl
) = init
;
5991 DECL_INITIALIZED_P (decl
) = 1;
5992 determine_visibility (decl
);
5993 layout_var_decl (decl
);
5994 maybe_commonize_var (decl
);
5995 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5998 /* INIT is the initializer for a variable, as represented by the
5999 parser. Returns true iff INIT is type-dependent. */
6002 type_dependent_init_p (tree init
)
6004 if (TREE_CODE (init
) == TREE_LIST
)
6005 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6006 return any_type_dependent_elements_p (init
);
6007 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6008 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6010 vec
<constructor_elt
, va_gc
> *elts
;
6014 elts
= CONSTRUCTOR_ELTS (init
);
6015 nelts
= vec_safe_length (elts
);
6016 for (i
= 0; i
< nelts
; ++i
)
6017 if (type_dependent_init_p ((*elts
)[i
].value
))
6021 /* It must be a simple expression, e.g., int i = 3; */
6022 return type_dependent_expression_p (init
);
6027 /* INIT is the initializer for a variable, as represented by the
6028 parser. Returns true iff INIT is value-dependent. */
6031 value_dependent_init_p (tree init
)
6033 if (TREE_CODE (init
) == TREE_LIST
)
6034 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6035 return any_value_dependent_elements_p (init
);
6036 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6037 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6039 vec
<constructor_elt
, va_gc
> *elts
;
6043 elts
= CONSTRUCTOR_ELTS (init
);
6044 nelts
= vec_safe_length (elts
);
6045 for (i
= 0; i
< nelts
; ++i
)
6046 if (value_dependent_init_p ((*elts
)[i
].value
))
6050 /* It must be a simple expression, e.g., int i = 3; */
6051 return value_dependent_expression_p (init
);
6056 /* Finish processing of a declaration;
6057 install its line number and initial value.
6058 If the length of an array type is not known before,
6059 it must be determined now, from the initial value, or it is an error.
6061 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6062 true, then INIT is an integral constant expression.
6064 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6065 if the (init) syntax was used. */
6068 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6069 tree asmspec_tree
, int flags
)
6072 vec
<tree
, va_gc
> *cleanups
= NULL
;
6073 const char *asmspec
= NULL
;
6074 int was_readonly
= 0;
6075 bool var_definition_p
= false;
6078 if (decl
== error_mark_node
)
6083 error ("assignment (not initialization) in declaration");
6087 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6088 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6089 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6091 type
= TREE_TYPE (decl
);
6092 if (type
== error_mark_node
)
6095 /* If a name was specified, get the string. */
6096 if (at_namespace_scope_p ())
6097 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6098 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6099 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6101 if (current_class_type
6102 && CP_DECL_CONTEXT (decl
) == current_class_type
6103 && TYPE_BEING_DEFINED (current_class_type
)
6104 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6105 && (DECL_INITIAL (decl
) || init
))
6106 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6108 if (TREE_CODE (decl
) != FUNCTION_DECL
6109 && (auto_node
= type_uses_auto (type
)))
6112 if (init
== NULL_TREE
)
6114 if (DECL_TEMPLATE_INSTANTIATION (decl
)
6115 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6117 /* init is null because we're deferring instantiating the
6118 initializer until we need it. Well, we need it now. */
6119 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6123 error ("declaration of %q#D has no initializer", decl
);
6124 TREE_TYPE (decl
) = error_mark_node
;
6128 if (TREE_CODE (d_init
) == TREE_LIST
)
6129 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6130 tf_warning_or_error
);
6131 d_init
= resolve_nondeduced_context (d_init
);
6132 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6134 if (type
== error_mark_node
)
6138 if (!ensure_literal_type_for_constexpr_object (decl
))
6139 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6141 if (TREE_CODE (decl
) == VAR_DECL
6142 && DECL_CLASS_SCOPE_P (decl
)
6143 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6144 check_static_variable_definition (decl
, type
);
6146 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6149 if (init
== ridpointers
[(int)RID_DELETE
])
6151 /* FIXME check this is 1st decl. */
6152 DECL_DELETED_FN (decl
) = 1;
6153 DECL_DECLARED_INLINE_P (decl
) = 1;
6154 DECL_INITIAL (decl
) = error_mark_node
;
6155 FOR_EACH_CLONE (clone
, decl
)
6157 DECL_DELETED_FN (clone
) = 1;
6158 DECL_DECLARED_INLINE_P (clone
) = 1;
6159 DECL_INITIAL (clone
) = error_mark_node
;
6163 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6165 if (defaultable_fn_check (decl
))
6166 DECL_DEFAULTED_FN (decl
) = 1;
6168 DECL_INITIAL (decl
) = NULL_TREE
;
6172 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6174 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6175 /* If DECL is a reference, then we want to know whether init is a
6176 reference constant; init_const_expr_p as passed tells us whether
6177 it's an rvalue constant. */
6178 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6179 init_const_expr_p
= potential_constant_expression (init
);
6180 if (init_const_expr_p
)
6182 /* Set these flags now for templates. We'll update the flags in
6183 store_init_value for instantiations. */
6184 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6185 if (decl_maybe_constant_var_p (decl
))
6186 TREE_CONSTANT (decl
) = 1;
6190 if (processing_template_decl
)
6192 bool type_dependent_p
;
6194 /* Add this declaration to the statement-tree. */
6195 if (at_function_scope_p ())
6196 add_decl_expr (decl
);
6198 type_dependent_p
= dependent_type_p (type
);
6200 if (check_for_bare_parameter_packs (init
))
6203 DECL_INITIAL (decl
) = NULL_TREE
;
6206 /* Generally, initializers in templates are expanded when the
6207 template is instantiated. But, if DECL is a variable constant
6208 then it can be used in future constant expressions, so its value
6209 must be available. */
6211 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6212 /* We can't do anything if the decl has dependent type. */;
6214 && init_const_expr_p
6215 && !type_dependent_p
6216 && decl_maybe_constant_var_p (decl
)
6217 && !type_dependent_init_p (init
)
6218 && !value_dependent_init_p (init
))
6220 /* This variable seems to be a non-dependent constant, so process
6221 its initializer. If check_initializer returns non-null the
6222 initialization wasn't constant after all. */
6224 cleanups
= make_tree_vector ();
6225 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6226 if (init_code
== NULL_TREE
)
6228 release_tree_vector (cleanups
);
6230 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6232 /* Deduce array size even if the initializer is dependent. */
6233 maybe_deduce_size_from_array_init (decl
, init
);
6234 /* And complain about multiple initializers. */
6235 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6236 && !MAYBE_CLASS_TYPE_P (type
))
6237 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6238 tf_warning_or_error
);
6242 DECL_INITIAL (decl
) = init
;
6246 /* Just store non-static data member initializers for later. */
6247 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6248 DECL_INITIAL (decl
) = init
;
6250 /* Take care of TYPE_DECLs up front. */
6251 if (TREE_CODE (decl
) == TYPE_DECL
)
6253 if (type
!= error_mark_node
6254 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6256 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6257 warning (0, "shadowing previous type declaration of %q#D", decl
);
6258 set_identifier_type_value (DECL_NAME (decl
), decl
);
6261 /* If we have installed this as the canonical typedef for this
6262 type, and that type has not been defined yet, delay emitting
6263 the debug information for it, as we will emit it later. */
6264 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6265 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6266 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6268 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6273 /* A reference will be modified here, as it is initialized. */
6274 if (! DECL_EXTERNAL (decl
)
6275 && TREE_READONLY (decl
)
6276 && TREE_CODE (type
) == REFERENCE_TYPE
)
6279 TREE_READONLY (decl
) = 0;
6282 if (TREE_CODE (decl
) == VAR_DECL
)
6284 /* If this is a local variable that will need a mangled name,
6285 register it now. We must do this before processing the
6286 initializer for the variable, since the initialization might
6287 require a guard variable, and since the mangled name of the
6288 guard variable will depend on the mangled name of this
6290 if (DECL_FUNCTION_SCOPE_P (decl
)
6291 && TREE_STATIC (decl
)
6292 && !DECL_ARTIFICIAL (decl
))
6294 push_local_name (decl
);
6295 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6296 || DECL_DESTRUCTOR_P (current_function_decl
))
6297 /* Normally local_decls is populated during GIMPLE lowering,
6298 but [cd]tors are never actually compiled directly. We need
6299 to put statics on the list so we can deal with the label
6300 address extension. FIXME. */
6301 add_local_decl (cfun
, decl
);
6304 /* Convert the initializer to the type of DECL, if we have not
6305 already initialized DECL. */
6306 if (!DECL_INITIALIZED_P (decl
)
6307 /* If !DECL_EXTERNAL then DECL is being defined. In the
6308 case of a static data member initialized inside the
6309 class-specifier, there can be an initializer even if DECL
6310 is *not* defined. */
6311 && (!DECL_EXTERNAL (decl
) || init
))
6313 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6316 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6317 /* Allow libjava/prims.cc define primitive classes. */
6318 if (init
!= NULL_TREE
6319 || jclass
== NULL_TREE
6320 || TREE_CODE (jclass
) != TYPE_DECL
6321 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6322 || !same_type_ignoring_top_level_qualifiers_p
6323 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6324 error ("Java object %qD not allocated with %<new%>", decl
);
6327 cleanups
= make_tree_vector ();
6328 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6330 /* Check that the initializer for a static data member was a
6331 constant. Although we check in the parser that the
6332 initializer is an integral constant expression, we do not
6333 simplify division-by-zero at the point at which it
6334 occurs. Therefore, in:
6336 struct S { static const int i = 7 / 0; };
6338 we issue an error at this point. It would
6339 probably be better to forbid division by zero in
6340 integral constant expressions. */
6341 if (DECL_EXTERNAL (decl
) && init
)
6343 error ("%qD cannot be initialized by a non-constant expression"
6344 " when being declared", decl
);
6345 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6353 The memory occupied by any object of static storage
6354 duration is zero-initialized at program startup before
6355 any other initialization takes place.
6357 We cannot create an appropriate initializer until after
6358 the type of DECL is finalized. If DECL_INITIAL is set,
6359 then the DECL is statically initialized, and any
6360 necessary zero-initialization has already been performed. */
6361 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6362 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6363 /*nelts=*/NULL_TREE
,
6364 /*static_storage_p=*/true);
6365 /* Remember that the initialization for this variable has
6367 DECL_INITIALIZED_P (decl
) = 1;
6368 /* This declaration is the definition of this variable,
6369 unless we are initializing a static data member within
6370 the class specifier. */
6371 if (!DECL_EXTERNAL (decl
))
6372 var_definition_p
= true;
6374 /* If the variable has an array type, lay out the type, even if
6375 there is no initializer. It is valid to index through the
6376 array, and we must get TYPE_ALIGN set correctly on the array
6378 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6381 if (TREE_STATIC (decl
)
6382 && !at_function_scope_p ()
6383 && current_function_decl
== NULL
)
6384 /* So decl is a global variable or a static member of a
6385 non local class. Record the types it uses
6386 so that we can decide later to emit debug info for them. */
6387 record_types_used_by_current_var_decl (decl
);
6389 else if (TREE_CODE (decl
) == FIELD_DECL
6390 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6391 error ("non-static data member %qD has Java class type", decl
);
6393 /* Add this declaration to the statement-tree. This needs to happen
6394 after the call to check_initializer so that the DECL_EXPR for a
6395 reference temp is added before the DECL_EXPR for the reference itself. */
6396 if (DECL_FUNCTION_SCOPE_P (decl
))
6397 add_decl_expr (decl
);
6399 /* Let the middle end know about variables and functions -- but not
6400 static data members in uninstantiated class templates. */
6401 if (TREE_CODE (decl
) == VAR_DECL
6402 || TREE_CODE (decl
) == FUNCTION_DECL
)
6404 if (TREE_CODE (decl
) == VAR_DECL
)
6406 layout_var_decl (decl
);
6407 maybe_commonize_var (decl
);
6410 /* This needs to happen after the linkage is set. */
6411 determine_visibility (decl
);
6413 if (var_definition_p
&& TREE_STATIC (decl
))
6415 /* If a TREE_READONLY variable needs initialization
6416 at runtime, it is no longer readonly and we need to
6417 avoid MEM_READONLY_P being set on RTL created for it. */
6420 if (TREE_READONLY (decl
))
6421 TREE_READONLY (decl
) = 0;
6424 else if (was_readonly
)
6425 TREE_READONLY (decl
) = 1;
6427 /* Likewise if it needs destruction. */
6428 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6429 TREE_READONLY (decl
) = 0;
6432 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6434 /* Check for abstractness of the type. Notice that there is no
6435 need to strip array types here since the check for those types
6436 is already done within create_array_type_for_decl. */
6437 if (TREE_CODE (type
) == FUNCTION_TYPE
6438 || TREE_CODE (type
) == METHOD_TYPE
)
6439 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6441 abstract_virtuals_error (decl
, type
);
6443 if (TREE_TYPE (decl
) == error_mark_node
)
6444 /* No initialization required. */
6446 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6450 if (init
== ridpointers
[(int)RID_DEFAULT
])
6452 /* An out-of-class default definition is defined at
6453 the point where it is explicitly defaulted. */
6454 if (DECL_DELETED_FN (decl
))
6455 maybe_explain_implicit_delete (decl
);
6456 else if (DECL_INITIAL (decl
) == error_mark_node
)
6457 synthesize_method (decl
);
6460 error ("function %q#D is initialized like a variable", decl
);
6462 /* else no initialization required. */
6464 else if (DECL_EXTERNAL (decl
)
6465 && ! (DECL_LANG_SPECIFIC (decl
)
6466 && DECL_NOT_REALLY_EXTERN (decl
)))
6469 DECL_INITIAL (decl
) = init
;
6471 /* A variable definition. */
6472 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6473 /* Initialize the local variable. */
6474 initialize_local_var (decl
, init
);
6476 /* If a variable is defined, and then a subsequent
6477 definition with external linkage is encountered, we will
6478 get here twice for the same variable. We want to avoid
6479 calling expand_static_init more than once. For variables
6480 that are not static data members, we can call
6481 expand_static_init only when we actually process the
6482 initializer. It is not legal to redeclare a static data
6483 member, so this issue does not arise in that case. */
6484 else if (var_definition_p
&& TREE_STATIC (decl
))
6485 expand_static_init (decl
, init
);
6488 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6489 reference, insert it in the statement-tree now. */
6493 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6494 push_cleanup (decl
, t
, false);
6495 release_tree_vector (cleanups
);
6499 TREE_READONLY (decl
) = 1;
6501 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6504 /* Returns a declaration for a VAR_DECL as if:
6506 extern "C" TYPE NAME;
6508 had been seen. Used to create compiler-generated global
6512 declare_global_var (tree name
, tree type
)
6516 push_to_top_level ();
6517 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6518 TREE_PUBLIC (decl
) = 1;
6519 DECL_EXTERNAL (decl
) = 1;
6520 DECL_ARTIFICIAL (decl
) = 1;
6521 /* If the user has explicitly declared this variable (perhaps
6522 because the code we are compiling is part of a low-level runtime
6523 library), then it is possible that our declaration will be merged
6524 with theirs by pushdecl. */
6525 decl
= pushdecl (decl
);
6526 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6527 pop_from_top_level ();
6532 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6533 if "__cxa_atexit" is not being used) corresponding to the function
6534 to be called when the program exits. */
6537 get_atexit_fn_ptr_type (void)
6541 if (!atexit_fn_ptr_type_node
)
6544 if (flag_use_cxa_atexit
6545 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6546 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6547 arg_type
= ptr_type_node
;
6549 /* The parameter to "atexit" is "void (*)(void)". */
6550 arg_type
= NULL_TREE
;
6552 fn_type
= build_function_type_list (void_type_node
,
6553 arg_type
, NULL_TREE
);
6554 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6557 return atexit_fn_ptr_type_node
;
6560 /* Returns a pointer to the `atexit' function. Note that if
6561 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6562 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6565 get_atexit_node (void)
6571 bool use_aeabi_atexit
;
6576 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6578 /* The declaration for `__cxa_atexit' is:
6580 int __cxa_atexit (void (*)(void *), void *, void *)
6582 We build up the argument types and then the function type
6584 tree argtype0
, argtype1
, argtype2
;
6586 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6587 /* First, build the pointer-to-function type for the first
6589 fn_ptr_type
= get_atexit_fn_ptr_type ();
6590 /* Then, build the rest of the argument types. */
6591 argtype2
= ptr_type_node
;
6592 if (use_aeabi_atexit
)
6594 argtype1
= fn_ptr_type
;
6595 argtype0
= ptr_type_node
;
6599 argtype1
= ptr_type_node
;
6600 argtype0
= fn_ptr_type
;
6602 /* And the final __cxa_atexit type. */
6603 fn_type
= build_function_type_list (integer_type_node
,
6604 argtype0
, argtype1
, argtype2
,
6606 if (use_aeabi_atexit
)
6607 name
= "__aeabi_atexit";
6609 name
= "__cxa_atexit";
6613 /* The declaration for `atexit' is:
6615 int atexit (void (*)());
6617 We build up the argument types and then the function type
6619 fn_ptr_type
= get_atexit_fn_ptr_type ();
6620 /* Build the final atexit type. */
6621 fn_type
= build_function_type_list (integer_type_node
,
6622 fn_ptr_type
, NULL_TREE
);
6626 /* Now, build the function declaration. */
6627 push_lang_context (lang_name_c
);
6628 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6629 mark_used (atexit_fndecl
);
6630 pop_lang_context ();
6631 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6636 /* Like get_atexit_node, but for thread-local cleanups. */
6639 get_thread_atexit_node (void)
6641 /* The declaration for `__cxa_thread_atexit' is:
6643 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6644 tree fn_type
= build_function_type_list (integer_type_node
,
6645 get_atexit_fn_ptr_type (),
6646 ptr_type_node
, ptr_type_node
,
6649 /* Now, build the function declaration. */
6650 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
);
6651 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6654 /* Returns the __dso_handle VAR_DECL. */
6657 get_dso_handle_node (void)
6659 if (dso_handle_node
)
6660 return dso_handle_node
;
6662 /* Declare the variable. */
6663 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6666 #ifdef HAVE_GAS_HIDDEN
6667 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6668 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6671 return dso_handle_node
;
6674 /* Begin a new function with internal linkage whose job will be simply
6675 to destroy some particular variable. */
6677 static GTY(()) int start_cleanup_cnt
;
6680 start_cleanup_fn (void)
6685 bool use_cxa_atexit
= flag_use_cxa_atexit
6686 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6688 push_to_top_level ();
6690 /* No need to mangle this. */
6691 push_lang_context (lang_name_c
);
6693 /* Build the name of the function. */
6694 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6695 /* Build the function declaration. */
6696 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6697 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6698 /* It's a function with internal linkage, generated by the
6700 TREE_PUBLIC (fndecl
) = 0;
6701 DECL_ARTIFICIAL (fndecl
) = 1;
6702 /* Make the function `inline' so that it is only emitted if it is
6703 actually needed. It is unlikely that it will be inlined, since
6704 it is only called via a function pointer, but we avoid unnecessary
6705 emissions this way. */
6706 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6707 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6708 /* Build the parameter. */
6713 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6714 DECL_CONTEXT (parmdecl
) = fndecl
;
6715 TREE_USED (parmdecl
) = 1;
6716 DECL_READ_P (parmdecl
) = 1;
6717 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6721 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6723 pop_lang_context ();
6725 return current_function_decl
;
6728 /* Finish the cleanup function begun by start_cleanup_fn. */
6731 end_cleanup_fn (void)
6733 expand_or_defer_fn (finish_function (0));
6735 pop_from_top_level ();
6738 /* Generate code to handle the destruction of DECL, an object with
6739 static storage duration. */
6742 register_dtor_fn (tree decl
)
6749 bool ob_parm
, dso_parm
, use_dtor
;
6750 tree arg0
, arg1
, arg2
;
6753 type
= TREE_TYPE (decl
);
6754 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6755 return void_zero_node
;
6757 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6758 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6759 destructor to "__cxa_atexit"; we don't have to build a temporary
6760 function to do the cleanup. */
6761 ob_parm
= (DECL_THREAD_LOCAL_P (decl
)
6762 || (flag_use_cxa_atexit
6763 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()));
6765 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6770 /* Find the destructor. */
6771 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6772 gcc_assert (idx
>= 0);
6773 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6774 /* Make sure it is accessible. */
6775 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6776 tf_warning_or_error
);
6780 /* Call build_cleanup before we enter the anonymous function so
6781 that any access checks will be done relative to the current
6782 scope, rather than the scope of the anonymous function. */
6783 build_cleanup (decl
);
6785 /* Now start the function. */
6786 cleanup
= start_cleanup_fn ();
6788 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6789 to the original function, rather than the anonymous one. That
6790 will make the back end think that nested functions are in use,
6791 which causes confusion. */
6792 push_deferring_access_checks (dk_no_check
);
6793 fcall
= build_cleanup (decl
);
6794 pop_deferring_access_checks ();
6796 /* Create the body of the anonymous function. */
6797 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6798 finish_expr_stmt (fcall
);
6799 finish_compound_stmt (compound_stmt
);
6803 /* Call atexit with the cleanup function. */
6804 mark_used (cleanup
);
6805 cleanup
= build_address (cleanup
);
6807 if (DECL_THREAD_LOCAL_P (decl
))
6808 atex_node
= get_thread_atexit_node ();
6810 atex_node
= get_atexit_node ();
6814 /* We must convert CLEANUP to the type that "__cxa_atexit"
6816 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6817 /* "__cxa_atexit" will pass the address of DECL to the
6818 cleanup function. */
6820 addr
= build_address (decl
);
6821 /* The declared type of the parameter to "__cxa_atexit" is
6822 "void *". For plain "T*", we could just let the
6823 machinery in cp_build_function_call convert it -- but if the
6824 type is "cv-qualified T *", then we need to convert it
6825 before passing it in, to avoid spurious errors. */
6826 addr
= build_nop (ptr_type_node
, addr
);
6829 /* Since the cleanup functions we build ignore the address
6830 they're given, there's no reason to pass the actual address
6831 in, and, in general, it's cheaper to pass NULL than any
6833 addr
= null_pointer_node
;
6836 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6837 tf_warning_or_error
);
6843 if (!DECL_THREAD_LOCAL_P (decl
)
6844 && targetm
.cxx
.use_aeabi_atexit ())
6860 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6861 arg0
, arg1
, arg2
, NULL_TREE
);
6864 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6865 is its initializer. Generate code to handle the construction
6866 and destruction of DECL. */
6869 expand_static_init (tree decl
, tree init
)
6871 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6872 gcc_assert (TREE_STATIC (decl
));
6874 /* Some variables require no dynamic initialization. */
6876 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6879 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6880 && !DECL_FUNCTION_SCOPE_P (decl
))
6883 error ("non-local variable %qD declared %<__thread%> "
6884 "needs dynamic initialization", decl
);
6886 error ("non-local variable %qD declared %<__thread%> "
6887 "has a non-trivial destructor", decl
);
6888 static bool informed
;
6891 inform (DECL_SOURCE_LOCATION (decl
),
6892 "C++11 %<thread_local%> allows dynamic initialization "
6899 if (DECL_FUNCTION_SCOPE_P (decl
))
6901 /* Emit code to perform this initialization but once. */
6902 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6903 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6904 tree guard
, guard_addr
;
6906 /* We don't need thread-safety code for thread-local vars. */
6907 bool thread_guard
= (flag_threadsafe_statics
6908 && !DECL_THREAD_LOCAL_P (decl
));
6910 /* Emit code to perform this initialization but once. This code
6913 static <type> guard;
6914 if (!guard.first_byte) {
6915 if (__cxa_guard_acquire (&guard)) {
6918 // Do initialization.
6919 flag = true; __cxa_guard_release (&guard);
6920 // Register variable for destruction at end of program.
6922 if (!flag) __cxa_guard_abort (&guard);
6926 Note that the `flag' variable is only set to 1 *after* the
6927 initialization is complete. This ensures that an exception,
6928 thrown during the construction, will cause the variable to
6929 reinitialized when we pass through this code again, as per:
6933 If the initialization exits by throwing an exception, the
6934 initialization is not complete, so it will be tried again
6935 the next time control enters the declaration.
6937 This process should be thread-safe, too; multiple threads
6938 should not be able to initialize the variable more than
6941 /* Create the guard variable. */
6942 guard
= get_guard (decl
);
6944 /* This optimization isn't safe on targets with relaxed memory
6945 consistency. On such targets we force synchronization in
6946 __cxa_guard_acquire. */
6947 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6949 /* Begin the conditional initialization. */
6950 if_stmt
= begin_if_stmt ();
6951 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6952 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6957 tree vfntype
= NULL_TREE
;
6958 tree acquire_name
, release_name
, abort_name
;
6959 tree acquire_fn
, release_fn
, abort_fn
;
6960 guard_addr
= build_address (guard
);
6962 acquire_name
= get_identifier ("__cxa_guard_acquire");
6963 release_name
= get_identifier ("__cxa_guard_release");
6964 abort_name
= get_identifier ("__cxa_guard_abort");
6965 acquire_fn
= identifier_global_value (acquire_name
);
6966 release_fn
= identifier_global_value (release_name
);
6967 abort_fn
= identifier_global_value (abort_name
);
6969 acquire_fn
= push_library_fn
6970 (acquire_name
, build_function_type_list (integer_type_node
,
6971 TREE_TYPE (guard_addr
),
6974 if (!release_fn
|| !abort_fn
)
6975 vfntype
= build_function_type_list (void_type_node
,
6976 TREE_TYPE (guard_addr
),
6979 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6981 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6983 inner_if_stmt
= begin_if_stmt ();
6984 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6987 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6988 begin
= get_target_expr (boolean_false_node
);
6989 flag
= TARGET_EXPR_SLOT (begin
);
6991 TARGET_EXPR_CLEANUP (begin
)
6992 = build3 (COND_EXPR
, void_type_node
, flag
,
6994 build_call_n (abort_fn
, 1, guard_addr
));
6995 CLEANUP_EH_ONLY (begin
) = 1;
6997 /* Do the initialization itself. */
6998 init
= add_stmt_to_compound (begin
, init
);
6999 init
= add_stmt_to_compound
7000 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7001 init
= add_stmt_to_compound
7002 (init
, build_call_n (release_fn
, 1, guard_addr
));
7005 init
= add_stmt_to_compound (init
, set_guard (guard
));
7007 /* Use atexit to register a function for destroying this static
7009 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7011 finish_expr_stmt (init
);
7015 finish_compound_stmt (inner_then_clause
);
7016 finish_then_clause (inner_if_stmt
);
7017 finish_if_stmt (inner_if_stmt
);
7020 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7022 finish_compound_stmt (then_clause
);
7023 finish_then_clause (if_stmt
);
7024 finish_if_stmt (if_stmt
);
7027 else if (DECL_THREAD_LOCAL_P (decl
))
7028 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7030 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7034 /* Make TYPE a complete type based on INITIAL_VALUE.
7035 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7036 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7037 3 if the initializer list is empty (in pedantic mode). */
7040 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7043 tree type
, elt_type
;
7047 unsigned HOST_WIDE_INT i
;
7050 /* An array of character type can be initialized from a
7051 brace-enclosed string constant.
7053 FIXME: this code is duplicated from reshape_init. Probably
7054 we should just call reshape_init here? */
7055 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7056 && TREE_CODE (initial_value
) == CONSTRUCTOR
7057 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7059 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7060 tree value
= (*v
)[0].value
;
7062 if (TREE_CODE (value
) == STRING_CST
7063 && v
->length () == 1)
7064 initial_value
= value
;
7067 /* If any of the elements are parameter packs, we can't actually
7068 complete this type now because the array size is dependent. */
7069 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7071 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7074 if (PACK_EXPANSION_P (value
))
7080 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7082 /* We can create the array before the element type is complete, which
7083 means that we didn't have these two bits set in the original type
7084 either. In completing the type, we are expected to propagate these
7085 bits. See also complete_type which does the same thing for arrays
7088 if (TYPE_DOMAIN (type
))
7090 elt_type
= TREE_TYPE (type
);
7091 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7092 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7093 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7099 /* As above, but either give an error or reject zero-size arrays, depending
7103 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7104 bool do_default
, tsubst_flags_t complain
)
7107 bool sfinae
= !(complain
& tf_error
);
7108 /* In SFINAE context we can't be lenient about zero-size arrays. */
7111 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7117 /* Not an error. */;
7118 else if (failure
== 1)
7119 error ("initializer fails to determine size of %qT", *ptype
);
7120 else if (failure
== 2)
7123 error ("array size missing in %qT", *ptype
);
7125 else if (failure
== 3)
7126 error ("zero-size array %qT", *ptype
);
7127 *ptype
= error_mark_node
;
7132 /* Return zero if something is declared to be a member of type
7133 CTYPE when in the context of CUR_TYPE. STRING is the error
7134 message to print in that case. Otherwise, quietly return 1. */
7137 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7139 if (ctype
&& ctype
!= cur_type
)
7141 if (flags
== DTOR_FLAG
)
7142 error ("destructor for alien class %qT cannot be a member", ctype
);
7144 error ("constructor for alien class %qT cannot be a member", ctype
);
7150 /* Subroutine of `grokdeclarator'. */
7152 /* Generate errors possibly applicable for a given set of specifiers.
7153 This is for ARM $7.1.2. */
7156 bad_specifiers (tree object
,
7157 enum bad_spec_place type
,
7168 error ("%qD declared as a %<virtual%> variable", object
);
7170 error ("%qD declared as an %<inline%> variable", object
);
7172 error ("%<const%> and %<volatile%> function specifiers on "
7173 "%qD invalid in variable declaration", object
);
7177 error ("%qD declared as a %<virtual%> parameter", object
);
7179 error ("%qD declared as an %<inline%> parameter", object
);
7181 error ("%<const%> and %<volatile%> function specifiers on "
7182 "%qD invalid in parameter declaration", object
);
7186 error ("%qD declared as a %<virtual%> type", object
);
7188 error ("%qD declared as an %<inline%> type", object
);
7190 error ("%<const%> and %<volatile%> function specifiers on "
7191 "%qD invalid in type declaration", object
);
7195 error ("%qD declared as a %<virtual%> field", object
);
7197 error ("%qD declared as an %<inline%> field", object
);
7199 error ("%<const%> and %<volatile%> function specifiers on "
7200 "%qD invalid in field declaration", object
);
7206 error ("%q+D declared as a friend", object
);
7208 && (TREE_CODE (object
) == TYPE_DECL
7209 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7210 && !TYPE_REFFN_P (TREE_TYPE (object
))
7211 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7212 error ("%q+D declared with an exception specification", object
);
7215 /* DECL is a member function or static data member and is presently
7216 being defined. Check that the definition is taking place in a
7220 check_class_member_definition_namespace (tree decl
)
7222 /* These checks only apply to member functions and static data
7224 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7225 || TREE_CODE (decl
) == VAR_DECL
);
7226 /* We check for problems with specializations in pt.c in
7227 check_specialization_namespace, where we can issue better
7229 if (processing_specialization
)
7231 /* There are no restrictions on the placement of
7232 explicit instantiations. */
7233 if (processing_explicit_instantiation
)
7237 A member function definition that appears outside of the
7238 class definition shall appear in a namespace scope enclosing
7239 the class definition.
7243 The definition for a static data member shall appear in a
7244 namespace scope enclosing the member's class definition. */
7245 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7246 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7247 decl
, DECL_CONTEXT (decl
));
7250 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7251 METHOD_TYPE for a non-static member function; QUALS are the
7252 cv-qualifiers that apply to the function. */
7255 build_this_parm (tree type
, cp_cv_quals quals
)
7260 cp_cv_quals this_quals
;
7262 if (CLASS_TYPE_P (type
))
7265 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7266 this_type
= build_pointer_type (this_type
);
7269 this_type
= type_of_this_parm (type
);
7270 /* The `this' parameter is implicitly `const'; it cannot be
7272 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7273 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7274 parm
= build_artificial_parm (this_identifier
, qual_type
);
7275 cp_apply_type_quals_to_decl (this_quals
, parm
);
7279 /* DECL is a static member function. Complain if it was declared
7280 with function-cv-quals. */
7283 check_static_quals (tree decl
, cp_cv_quals quals
)
7285 if (quals
!= TYPE_UNQUALIFIED
)
7286 error ("static member function %q#D declared with type qualifiers",
7290 /* CTYPE is class type, or null if non-class.
7291 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7293 DECLARATOR is the function's name.
7294 PARMS is a chain of PARM_DECLs for the function.
7295 VIRTUALP is truthvalue of whether the function is virtual or not.
7296 FLAGS are to be passed through to `grokclassfn'.
7297 QUALS are qualifiers indicating whether the function is `const'
7299 RAISES is a list of exceptions that this function can raise.
7300 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7301 not look, and -1 if we should not call `grokclassfn' at all.
7303 SFK is the kind of special function (if any) for the new function.
7305 Returns `NULL_TREE' if something goes wrong, after issuing
7306 applicable error messages. */
7309 grokfndecl (tree ctype
,
7313 tree orig_declarator
,
7315 enum overload_flags flags
,
7322 special_function_kind sfk
,
7327 location_t location
)
7330 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7334 type
= build_exception_variant (type
, raises
);
7336 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7338 /* If we have an explicit location, use it, otherwise use whatever
7339 build_lang_decl used (probably input_location). */
7340 if (location
!= UNKNOWN_LOCATION
)
7341 DECL_SOURCE_LOCATION (decl
) = location
;
7343 if (TREE_CODE (type
) == METHOD_TYPE
)
7346 parm
= build_this_parm (type
, quals
);
7347 DECL_CHAIN (parm
) = parms
;
7350 DECL_ARGUMENTS (decl
) = parms
;
7351 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7352 DECL_CONTEXT (t
) = decl
;
7353 /* Propagate volatile out from type to decl. */
7354 if (TYPE_VOLATILE (type
))
7355 TREE_THIS_VOLATILE (decl
) = 1;
7357 /* Setup decl according to sfk. */
7360 case sfk_constructor
:
7361 case sfk_copy_constructor
:
7362 case sfk_move_constructor
:
7363 DECL_CONSTRUCTOR_P (decl
) = 1;
7365 case sfk_destructor
:
7366 DECL_DESTRUCTOR_P (decl
) = 1;
7372 /* If pointers to member functions use the least significant bit to
7373 indicate whether a function is virtual, ensure a pointer
7374 to this function will have that bit clear. */
7375 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7376 && TREE_CODE (type
) == METHOD_TYPE
7377 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7378 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7381 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7385 ("defining explicit specialization %qD in friend declaration",
7389 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7390 tree args
= TREE_OPERAND (orig_declarator
, 1);
7392 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7394 /* Something like `template <class T> friend void f<T>()'. */
7395 error ("invalid use of template-id %qD in declaration "
7396 "of primary template",
7402 /* A friend declaration of the form friend void f<>(). Record
7403 the information in the TEMPLATE_ID_EXPR. */
7404 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7406 if (TREE_CODE (fns
) == COMPONENT_REF
)
7408 /* Due to bison parser ickiness, we will have already looked
7409 up an operator_name or PFUNCNAME within the current class
7410 (see template_id in parse.y). If the current class contains
7411 such a name, we'll get a COMPONENT_REF here. Undo that. */
7413 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7414 == current_class_type
);
7415 fns
= TREE_OPERAND (fns
, 1);
7417 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7418 || TREE_CODE (fns
) == OVERLOAD
);
7419 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7421 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7422 if (TREE_PURPOSE (t
)
7423 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7425 error ("default arguments are not allowed in declaration "
7426 "of friend template specialization %qD",
7433 error ("%<inline%> is not allowed in declaration of friend "
7434 "template specialization %qD",
7441 /* If this decl has namespace scope, set that up. */
7443 set_decl_namespace (decl
, in_namespace
, friendp
);
7445 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7447 /* `main' and builtins have implicit 'C' linkage. */
7448 if ((MAIN_NAME_P (declarator
)
7449 || (IDENTIFIER_LENGTH (declarator
) > 10
7450 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7451 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7452 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7453 && current_lang_name
== lang_name_cplusplus
7454 && ctype
== NULL_TREE
7455 && DECL_FILE_SCOPE_P (decl
))
7456 SET_DECL_LANGUAGE (decl
, lang_c
);
7458 /* Should probably propagate const out from type to decl I bet (mrs). */
7461 DECL_STATIC_FUNCTION_P (decl
) = 1;
7462 DECL_CONTEXT (decl
) = ctype
;
7467 DECL_CONTEXT (decl
) = ctype
;
7469 check_class_member_definition_namespace (decl
);
7472 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7474 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7475 error ("cannot declare %<::main%> to be a template");
7477 error ("cannot declare %<::main%> to be inline");
7479 error ("cannot declare %<::main%> to be static");
7484 /* Members of anonymous types and local classes have no linkage; make
7485 them internal. If a typedef is made later, this will be changed. */
7486 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7487 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7490 if (publicp
&& cxx_dialect
== cxx98
)
7492 /* [basic.link]: A name with no linkage (notably, the name of a class
7493 or enumeration declared in a local scope) shall not be used to
7494 declare an entity with linkage.
7496 DR 757 relaxes this restriction for C++0x. */
7497 t
= no_linkage_check (TREE_TYPE (decl
),
7498 /*relaxed_p=*/false);
7501 if (TYPE_ANONYMOUS_P (t
))
7503 if (DECL_EXTERN_C_P (decl
))
7504 /* Allow this; it's pretty common in C. */;
7507 permerror (input_location
, "anonymous type with no linkage "
7508 "used to declare function %q#D with linkage",
7510 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7511 permerror (input_location
, "%q+#D does not refer to the unqualified "
7512 "type, so it is not used for linkage",
7517 permerror (input_location
, "type %qT with no linkage used to "
7518 "declare function %q#D with linkage", t
, decl
);
7522 TREE_PUBLIC (decl
) = publicp
;
7525 DECL_INTERFACE_KNOWN (decl
) = 1;
7526 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7529 /* If the declaration was declared inline, mark it as such. */
7531 DECL_DECLARED_INLINE_P (decl
) = 1;
7533 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7535 DECL_EXTERNAL (decl
) = 1;
7536 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7539 ? G_("static member function %qD cannot have cv-qualifier")
7540 : G_("non-member function %qD cannot have cv-qualifier"),
7542 quals
= TYPE_UNQUALIFIED
;
7545 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7546 && !grok_op_properties (decl
, /*complain=*/true))
7548 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7550 bool long_long_unsigned_p
;
7552 const char *suffix
= NULL
;
7553 /* [over.literal]/6: Literal operators shall not have C linkage. */
7554 if (DECL_LANGUAGE (decl
) == lang_c
)
7556 error ("literal operator with C linkage");
7560 if (DECL_NAMESPACE_SCOPE_P (decl
))
7562 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7565 error ("%qD has invalid argument list", decl
);
7569 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7570 if (long_long_unsigned_p
)
7572 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7573 warning (0, "integer suffix %<%s%>"
7574 " shadowed by implementation", suffix
);
7576 else if (long_double_p
)
7578 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7579 warning (0, "floating point suffix %<%s%>"
7580 " shadowed by implementation", suffix
);
7585 error ("%qD must be a non-member function", decl
);
7591 /* Make the init_value nonzero so pushdecl knows this is not
7592 tentative. error_mark_node is replaced later with the BLOCK. */
7593 DECL_INITIAL (decl
) = error_mark_node
;
7595 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7596 TREE_NOTHROW (decl
) = 1;
7598 /* Caller will do the rest of this. */
7602 if (ctype
!= NULL_TREE
)
7603 grokclassfn (ctype
, decl
, flags
);
7606 if (cxx_dialect
>= cxx0x
7607 && DECL_DESTRUCTOR_P (decl
)
7608 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7609 && !processing_template_decl
)
7610 deduce_noexcept_on_destructor (decl
);
7612 decl
= check_explicit_specialization (orig_declarator
, decl
,
7615 4 * (friendp
!= 0));
7616 if (decl
== error_mark_node
)
7619 if (DECL_STATIC_FUNCTION_P (decl
))
7620 check_static_quals (decl
, quals
);
7624 cplus_decl_attributes (&decl
, *attrlist
, 0);
7625 *attrlist
= NULL_TREE
;
7628 /* Check main's type after attributes have been applied. */
7629 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7631 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7634 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7636 error ("%<::main%> must return %<int%>");
7637 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7638 TREE_TYPE (decl
) = newtype
;
7641 check_main_parameter_types (decl
);
7644 if (ctype
!= NULL_TREE
7645 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7648 tree old_decl
= check_classfn (ctype
, decl
,
7649 (processing_template_decl
7650 > template_class_depth (ctype
))
7651 ? current_template_parms
7654 if (old_decl
== error_mark_node
)
7662 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7663 /* Because grokfndecl is always supposed to return a
7664 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7665 here. We depend on our callers to figure out that its
7666 really a template that's being returned. */
7667 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7669 if (DECL_STATIC_FUNCTION_P (old_decl
)
7670 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7672 /* Remove the `this' parm added by grokclassfn. */
7673 revert_static_member_fn (decl
);
7674 check_static_quals (decl
, quals
);
7676 if (DECL_ARTIFICIAL (old_decl
))
7678 error ("definition of implicitly-declared %qD", old_decl
);
7681 else if (DECL_DEFAULTED_FN (old_decl
))
7683 error ("definition of explicitly-defaulted %q+D", decl
);
7684 error ("%q+#D explicitly defaulted here", old_decl
);
7688 /* Since we've smashed OLD_DECL to its
7689 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7690 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7691 decl
= DECL_TEMPLATE_RESULT (decl
);
7693 /* Attempt to merge the declarations. This can fail, in
7694 the case of some invalid specialization declarations. */
7695 pushed_scope
= push_scope (ctype
);
7696 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7698 pop_scope (pushed_scope
);
7701 error ("no %q#D member function declared in class %qT",
7709 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7712 if (ctype
== NULL_TREE
|| check
)
7716 DECL_VIRTUAL_P (decl
) = 1;
7721 /* decl is a FUNCTION_DECL.
7722 specifiers are the parsed virt-specifiers.
7724 Set flags to reflect the virt-specifiers.
7729 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7731 if (decl
== NULL_TREE
)
7733 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7734 DECL_OVERRIDE_P (decl
) = 1;
7735 if (specifiers
& VIRT_SPEC_FINAL
)
7736 DECL_FINAL_P (decl
) = 1;
7740 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7741 the linkage that DECL will receive in the object file. */
7744 set_linkage_for_static_data_member (tree decl
)
7746 /* A static data member always has static storage duration and
7747 external linkage. Note that static data members are forbidden in
7748 local classes -- the only situation in which a class has
7749 non-external linkage. */
7750 TREE_PUBLIC (decl
) = 1;
7751 TREE_STATIC (decl
) = 1;
7752 /* For non-template classes, static data members are always put
7753 out in exactly those files where they are defined, just as
7754 with ordinary namespace-scope variables. */
7755 if (!processing_template_decl
)
7756 DECL_INTERFACE_KNOWN (decl
) = 1;
7759 /* Create a VAR_DECL named NAME with the indicated TYPE.
7761 If SCOPE is non-NULL, it is the class type or namespace containing
7762 the variable. If SCOPE is NULL, the variable should is created in
7763 the innermost enclosings scope. */
7766 grokvardecl (tree type
,
7768 const cp_decl_specifier_seq
*declspecs
,
7774 tree explicit_scope
;
7776 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7778 /* Compute the scope in which to place the variable, but remember
7779 whether or not that scope was explicitly specified by the user. */
7780 explicit_scope
= scope
;
7783 /* An explicit "extern" specifier indicates a namespace-scope
7785 if (declspecs
->storage_class
== sc_extern
)
7786 scope
= current_decl_namespace ();
7787 else if (!at_function_scope_p ())
7788 scope
= current_scope ();
7792 && (/* If the variable is a namespace-scope variable declared in a
7793 template, we need DECL_LANG_SPECIFIC. */
7794 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7795 /* Similarly for namespace-scope variables with language linkage
7797 || (TREE_CODE (scope
) == NAMESPACE_DECL
7798 && current_lang_name
!= lang_name_cplusplus
)
7799 /* Similarly for static data members. */
7801 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7803 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7805 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7806 set_decl_namespace (decl
, explicit_scope
, 0);
7808 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7810 if (declspecs
->storage_class
== sc_extern
)
7812 DECL_THIS_EXTERN (decl
) = 1;
7813 DECL_EXTERNAL (decl
) = !initialized
;
7816 if (DECL_CLASS_SCOPE_P (decl
))
7818 set_linkage_for_static_data_member (decl
);
7819 /* This function is only called with out-of-class definitions. */
7820 DECL_EXTERNAL (decl
) = 0;
7821 check_class_member_definition_namespace (decl
);
7823 /* At top level, either `static' or no s.c. makes a definition
7824 (perhaps tentative), and absence of `static' makes it public. */
7825 else if (toplevel_bindings_p ())
7827 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7828 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7829 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7831 /* Not at top level, only `static' makes a static definition. */
7834 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7835 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7838 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7840 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7841 if (declspecs
->gnu_thread_keyword_p
)
7842 DECL_GNU_TLS_P (decl
) = true;
7845 /* If the type of the decl has no linkage, make sure that we'll
7846 notice that in mark_used. */
7847 if (cxx_dialect
> cxx98
7848 && decl_linkage (decl
) != lk_none
7849 && DECL_LANG_SPECIFIC (decl
) == NULL
7850 && !DECL_EXTERN_C_P (decl
)
7851 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7852 retrofit_lang_decl (decl
);
7854 if (TREE_PUBLIC (decl
))
7856 /* [basic.link]: A name with no linkage (notably, the name of a class
7857 or enumeration declared in a local scope) shall not be used to
7858 declare an entity with linkage.
7860 DR 757 relaxes this restriction for C++0x. */
7861 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7862 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7865 if (TYPE_ANONYMOUS_P (t
))
7867 if (DECL_EXTERN_C_P (decl
))
7868 /* Allow this; it's pretty common in C. */
7872 /* DRs 132, 319 and 389 seem to indicate types with
7873 no linkage can only be used to declare extern "C"
7874 entities. Since it's not always an error in the
7875 ISO C++ 90 Standard, we only issue a warning. */
7876 warning (0, "anonymous type with no linkage used to declare "
7877 "variable %q#D with linkage", decl
);
7878 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7879 warning (0, "%q+#D does not refer to the unqualified "
7880 "type, so it is not used for linkage",
7885 warning (0, "type %qT with no linkage used to declare variable "
7886 "%q#D with linkage", t
, decl
);
7890 DECL_INTERFACE_KNOWN (decl
) = 1;
7895 /* Create and return a canonical pointer to member function type, for
7896 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7899 build_ptrmemfunc_type (tree type
)
7903 tree unqualified_variant
= NULL_TREE
;
7905 if (type
== error_mark_node
)
7908 /* If a canonical type already exists for this type, use it. We use
7909 this method instead of type_hash_canon, because it only does a
7910 simple equality check on the list of field members. */
7912 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7915 /* Make sure that we always have the unqualified pointer-to-member
7917 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7919 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7921 t
= make_class_type (RECORD_TYPE
);
7922 xref_basetypes (t
, NULL_TREE
);
7924 /* Let the front end know this is a pointer to member function... */
7925 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7926 /* ... and not really a class type. */
7927 SET_CLASS_TYPE_P (t
, 0);
7929 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7932 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7934 DECL_CHAIN (field
) = fields
;
7937 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7939 /* Zap out the name so that the back end will give us the debugging
7940 information for this anonymous RECORD_TYPE. */
7941 TYPE_NAME (t
) = NULL_TREE
;
7943 /* If this is not the unqualified form of this pointer-to-member
7944 type, set the TYPE_MAIN_VARIANT for this type to be the
7945 unqualified type. Since they are actually RECORD_TYPEs that are
7946 not variants of each other, we must do this manually.
7947 As we just built a new type there is no need to do yet another copy. */
7948 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7950 int type_quals
= cp_type_quals (type
);
7951 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7952 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7953 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7954 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7955 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7956 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7957 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7960 /* Cache this pointer-to-member type so that we can find it again
7962 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7964 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7965 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7966 else if (TYPE_CANONICAL (type
) != type
)
7967 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7972 /* Create and return a pointer to data member type. */
7975 build_ptrmem_type (tree class_type
, tree member_type
)
7977 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7979 cp_cv_quals quals
= type_memfn_quals (member_type
);
7980 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7981 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7985 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7986 return build_offset_type (class_type
, member_type
);
7990 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7991 Check to see that the definition is valid. Issue appropriate error
7992 messages. Return 1 if the definition is particularly bad, or 0
7996 check_static_variable_definition (tree decl
, tree type
)
7998 /* Can't check yet if we don't know the type. */
7999 if (dependent_type_p (type
))
8001 /* If DECL is declared constexpr, we'll do the appropriate checks
8002 in check_initializer. */
8003 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8005 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8007 if (!COMPLETE_TYPE_P (type
))
8008 error ("in-class initialization of static data member %q#D of "
8009 "incomplete type", decl
);
8010 else if (literal_type_p (type
))
8011 permerror (input_location
,
8012 "%<constexpr%> needed for in-class initialization of "
8013 "static data member %q#D of non-integral type", decl
);
8015 error ("in-class initialization of static data member %q#D of "
8016 "non-literal type", decl
);
8020 /* Motion 10 at San Diego: If a static const integral data member is
8021 initialized with an integral constant expression, the initializer
8022 may appear either in the declaration (within the class), or in
8023 the definition, but not both. If it appears in the class, the
8024 member is a member constant. The file-scope definition is always
8026 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8028 error ("invalid in-class initialization of static data member "
8029 "of non-integral type %qT",
8033 else if (!CP_TYPE_CONST_P (type
))
8034 error ("ISO C++ forbids in-class initialization of non-const "
8035 "static member %qD",
8037 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8038 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8039 "%qD of non-integral type %qT", decl
, type
);
8044 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8045 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8046 expressions out into temporary variables so that walk_tree doesn't
8047 step into them (c++/15764). */
8050 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8052 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8053 tree expr
= *expr_p
;
8054 if (TREE_CODE (expr
) == SAVE_EXPR
)
8056 tree op
= TREE_OPERAND (expr
, 0);
8057 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8058 if (TREE_SIDE_EFFECTS (op
))
8059 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8062 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8067 /* Entry point for the above. */
8070 stabilize_vla_size (tree size
)
8072 struct pointer_set_t
*pset
= pointer_set_create ();
8073 /* Break out any function calls into temporary variables. */
8074 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8075 pointer_set_destroy (pset
);
8078 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8079 not inside of SAVE_EXPR and fold them. */
8082 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8084 tree expr
= *expr_p
;
8085 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8087 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8089 *(bool *)data
= true;
8090 if (SIZEOF_EXPR_TYPE_P (expr
))
8091 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8092 SIZEOF_EXPR
, false);
8093 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8094 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8097 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8099 if (expr
== error_mark_node
)
8100 expr
= size_one_node
;
8107 /* Given the SIZE (i.e., number of elements) in an array, compute an
8108 appropriate index type for the array. If non-NULL, NAME is the
8109 name of the thing being declared. */
8112 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8116 tree abi_1_itype
= NULL_TREE
;
8118 if (error_operand_p (size
))
8119 return error_mark_node
;
8121 if (!type_dependent_expression_p (size
))
8123 tree type
= TREE_TYPE (size
);
8125 mark_rvalue_use (size
);
8127 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
8128 && TREE_SIDE_EFFECTS (size
))
8129 /* In C++98, we mark a non-constant array bound with a magic
8130 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8133 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8135 if (CLASS_TYPE_P (type
)
8136 && CLASSTYPE_LITERAL_P (type
))
8138 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8141 if (!(complain
& tf_error
))
8142 return error_mark_node
;
8144 error ("size of array %qD has non-integral type %qT",
8147 error ("size of array has non-integral type %qT", type
);
8148 size
= integer_one_node
;
8150 if (size
== error_mark_node
)
8151 return error_mark_node
;
8152 type
= TREE_TYPE (size
);
8153 /* We didn't support this case in GCC 3.2, so don't bother
8154 trying to model it now in ABI v1. */
8155 abi_1_itype
= error_mark_node
;
8158 size
= maybe_constant_value (size
);
8159 if (!TREE_CONSTANT (size
))
8163 if (error_operand_p (size
))
8164 return error_mark_node
;
8166 /* The array bound must be an integer type. */
8167 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8169 if (!(complain
& tf_error
))
8170 return error_mark_node
;
8172 error ("size of array %qD has non-integral type %qT", name
, type
);
8174 error ("size of array has non-integral type %qT", type
);
8175 size
= integer_one_node
;
8176 type
= TREE_TYPE (size
);
8180 /* A type is dependent if it is...an array type constructed from any
8181 dependent type or whose size is specified by a constant expression
8182 that is value-dependent. */
8183 /* We can only call value_dependent_expression_p on integral constant
8184 expressions; treat non-constant expressions as dependent, too. */
8185 if (processing_template_decl
8186 && (type_dependent_expression_p (size
)
8187 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8189 /* We cannot do any checking for a SIZE that isn't known to be
8190 constant. Just build the index type and mark that it requires
8191 structural equality checks. */
8192 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8193 size
, integer_one_node
));
8194 TYPE_DEPENDENT_P (itype
) = 1;
8195 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8196 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8200 if (!abi_version_at_least (2) && processing_template_decl
8201 && abi_1_itype
== NULL_TREE
)
8202 /* For abi-1, we handled all instances in templates the same way,
8203 even when they were non-dependent. This affects the manglings
8204 produced. So, we do the normal checking for non-dependent
8205 sizes, but at the end we'll return the same type that abi-1
8206 would have, but with TYPE_CANONICAL set to the "right"
8207 value that the current ABI would provide. */
8208 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8209 osize
, integer_one_node
));
8211 /* Normally, the array-bound will be a constant. */
8212 if (TREE_CODE (size
) == INTEGER_CST
)
8214 /* Check to see if the array bound overflowed. Make that an
8215 error, no matter how generous we're being. */
8216 constant_expression_error (size
);
8218 /* An array must have a positive number of elements. */
8219 if (INT_CST_LT (size
, integer_zero_node
))
8221 if (!(complain
& tf_error
))
8222 return error_mark_node
;
8224 error ("size of array %qD is negative", name
);
8226 error ("size of array is negative");
8227 size
= integer_one_node
;
8229 /* As an extension we allow zero-sized arrays. */
8230 else if (integer_zerop (size
))
8232 if (!(complain
& tf_error
))
8233 /* We must fail if performing argument deduction (as
8234 indicated by the state of complain), so that
8235 another substitution can be found. */
8236 return error_mark_node
;
8237 else if (in_system_header
)
8238 /* Allow them in system headers because glibc uses them. */;
8240 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8242 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8245 else if (TREE_CONSTANT (size
)
8246 /* We don't allow VLAs at non-function scopes, or during
8247 tentative template substitution. */
8248 || !at_function_scope_p () || !(complain
& tf_error
))
8250 if (!(complain
& tf_error
))
8251 return error_mark_node
;
8252 /* `(int) &fn' is not a valid array bound. */
8254 error ("size of array %qD is not an integral constant-expression",
8257 error ("size of array is not an integral constant-expression");
8258 size
= integer_one_node
;
8260 else if (pedantic
&& warn_vla
!= 0)
8263 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8265 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8267 else if (warn_vla
> 0)
8271 "variable length array %qD is used", name
);
8274 "variable length array is used");
8277 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8278 /* A variable sized array. */
8279 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8282 HOST_WIDE_INT saved_processing_template_decl
;
8284 /* Compute the index of the largest element in the array. It is
8285 one less than the number of elements in the array. We save
8286 and restore PROCESSING_TEMPLATE_DECL so that computations in
8287 cp_build_binary_op will be appropriately folded. */
8288 saved_processing_template_decl
= processing_template_decl
;
8289 processing_template_decl
= 0;
8290 itype
= cp_build_binary_op (input_location
,
8292 cp_convert (ssizetype
, size
, complain
),
8293 cp_convert (ssizetype
, integer_one_node
,
8296 itype
= fold (itype
);
8297 processing_template_decl
= saved_processing_template_decl
;
8299 if (!TREE_CONSTANT (itype
))
8301 /* A variable sized array. */
8302 itype
= variable_size (itype
);
8303 if (TREE_CODE (itype
) != SAVE_EXPR
)
8305 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8306 they might survive till gimplification. */
8307 tree newitype
= itype
;
8309 cp_walk_tree_without_duplicates (&newitype
,
8310 fold_sizeof_expr_r
, &found
);
8312 itype
= variable_size (fold (newitype
));
8315 /* Make sure that there was no overflow when creating to a signed
8316 index type. (For example, on a 32-bit machine, an array with
8317 size 2^32 - 1 is too big.) */
8318 else if (TREE_CODE (itype
) == INTEGER_CST
8319 && TREE_OVERFLOW (itype
))
8321 if (!(complain
& tf_error
))
8322 return error_mark_node
;
8323 error ("overflow in array dimension");
8324 TREE_OVERFLOW (itype
) = 0;
8328 /* Create and return the appropriate index type. */
8329 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8331 tree t
= build_index_type (itype
);
8332 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8333 itype
= abi_1_itype
;
8336 itype
= build_index_type (itype
);
8338 /* If the index type were dependent, we would have returned early, so
8339 remember that it isn't. */
8340 TYPE_DEPENDENT_P (itype
) = 0;
8341 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8345 /* Returns the scope (if any) in which the entity declared by
8346 DECLARATOR will be located. If the entity was declared with an
8347 unqualified name, NULL_TREE is returned. */
8350 get_scope_of_declarator (const cp_declarator
*declarator
)
8352 while (declarator
&& declarator
->kind
!= cdk_id
)
8353 declarator
= declarator
->declarator
;
8355 /* If the declarator-id is a SCOPE_REF, the scope in which the
8356 declaration occurs is the first operand. */
8358 && declarator
->u
.id
.qualifying_scope
)
8359 return declarator
->u
.id
.qualifying_scope
;
8361 /* Otherwise, the declarator is not a qualified name; the entity will
8362 be declared in the current scope. */
8366 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8367 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8371 create_array_type_for_decl (tree name
, tree type
, tree size
)
8373 tree itype
= NULL_TREE
;
8375 /* If things have already gone awry, bail now. */
8376 if (type
== error_mark_node
|| size
== error_mark_node
)
8377 return error_mark_node
;
8379 /* 8.3.4/1: If the type of the identifier of D contains the auto
8380 type-specifier, the program is ill-formed. */
8381 if (pedantic
&& type_uses_auto (type
))
8382 pedwarn (input_location
, OPT_Wpedantic
,
8383 "declaration of %qD as array of %<auto%>", name
);
8385 /* If there are some types which cannot be array elements,
8386 issue an error-message and return. */
8387 switch (TREE_CODE (type
))
8391 error ("declaration of %qD as array of void", name
);
8393 error ("creating array of void");
8394 return error_mark_node
;
8398 error ("declaration of %qD as array of functions", name
);
8400 error ("creating array of functions");
8401 return error_mark_node
;
8403 case REFERENCE_TYPE
:
8405 error ("declaration of %qD as array of references", name
);
8407 error ("creating array of references");
8408 return error_mark_node
;
8412 error ("declaration of %qD as array of function members", name
);
8414 error ("creating array of function members");
8415 return error_mark_node
;
8423 The constant expressions that specify the bounds of the arrays
8424 can be omitted only for the first member of the sequence. */
8425 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8428 error ("declaration of %qD as multidimensional array must "
8429 "have bounds for all dimensions except the first",
8432 error ("multidimensional array must have bounds for all "
8433 "dimensions except the first");
8435 return error_mark_node
;
8438 /* Figure out the index type for the array. */
8440 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8443 T is called the array element type; this type shall not be [...] an
8444 abstract class type. */
8445 abstract_virtuals_error (name
, type
);
8447 return build_cplus_array_type (type
, itype
);
8450 /* Check that it's OK to declare a function with the indicated TYPE.
8451 SFK indicates the kind of special function (if any) that this
8452 function is. OPTYPE is the type given in a conversion operator
8453 declaration, or the class type for a constructor/destructor.
8454 Returns the actual return type of the function; that
8455 may be different than TYPE if an error occurs, or for certain
8456 special functions. */
8459 check_special_function_return_type (special_function_kind sfk
,
8465 case sfk_constructor
:
8467 error ("return type specification for constructor invalid");
8469 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8470 type
= build_pointer_type (optype
);
8472 type
= void_type_node
;
8475 case sfk_destructor
:
8477 error ("return type specification for destructor invalid");
8478 /* We can't use the proper return type here because we run into
8479 problems with ambiguous bases and covariant returns.
8480 Java classes are left unchanged because (void *) isn't a valid
8481 Java type, and we don't want to change the Java ABI. */
8482 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8483 type
= build_pointer_type (void_type_node
);
8485 type
= void_type_node
;
8488 case sfk_conversion
:
8490 error ("return type specified for %<operator %T%>", optype
);
8501 /* A variable or data member (whose unqualified name is IDENTIFIER)
8502 has been declared with the indicated TYPE. If the TYPE is not
8503 acceptable, issue an error message and return a type to use for
8504 error-recovery purposes. */
8507 check_var_type (tree identifier
, tree type
)
8509 if (VOID_TYPE_P (type
))
8512 error ("unnamed variable or field declared void");
8513 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8515 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8516 error ("variable or field %qE declared void", identifier
);
8519 error ("variable or field declared void");
8520 type
= error_mark_node
;
8526 /* Functions for adjusting the visibility of a tagged type and its nested
8527 types when it gets a name for linkage purposes from a typedef. */
8529 static void bt_reset_linkage (binding_entry
, void *);
8531 reset_type_linkage (tree type
)
8533 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8534 if (CLASS_TYPE_P (type
))
8535 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8538 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8540 reset_type_linkage (b
->type
);
8543 /* Given declspecs and a declarator (abstract or otherwise), determine
8544 the name and type of the object declared and construct a DECL node
8547 DECLSPECS points to the representation of declaration-specifier
8548 sequence that precedes declarator.
8550 DECL_CONTEXT says which syntactic context this declaration is in:
8551 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8552 FUNCDEF for a function definition. Like NORMAL but a few different
8553 error messages in each case. Return value may be zero meaning
8554 this definition is too screwy to try to parse.
8555 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8556 handle member functions (which have FIELD context).
8557 Return value may be zero meaning this definition is too screwy to
8559 PARM for a parameter declaration (either within a function prototype
8560 or before a function body). Make a PARM_DECL, or return void_type_node.
8561 TPARM for a template parameter declaration.
8562 CATCHPARM for a parameter declaration before a catch clause.
8563 TYPENAME if for a typename (in a cast or sizeof).
8564 Don't make a DECL node; just return the ..._TYPE node.
8565 FIELD for a struct or union field; make a FIELD_DECL.
8566 BITFIELD for a field with specified width.
8568 INITIALIZED is as for start_decl.
8570 ATTRLIST is a pointer to the list of attributes, which may be NULL
8571 if there are none; *ATTRLIST may be modified if attributes from inside
8572 the declarator should be applied to the declaration.
8574 When this function is called, scoping variables (such as
8575 CURRENT_CLASS_TYPE) should reflect the scope in which the
8576 declaration occurs, not the scope in which the new declaration will
8577 be placed. For example, on:
8581 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8584 Returns a DECL (if a declarator is present), a TYPE (if there is no
8585 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8589 grokdeclarator (const cp_declarator
*declarator
,
8590 cp_decl_specifier_seq
*declspecs
,
8591 enum decl_context decl_context
,
8595 tree type
= NULL_TREE
;
8597 int explicit_int128
= 0;
8598 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8599 int explicit_int
= 0;
8600 int explicit_char
= 0;
8601 int defaulted_int
= 0;
8602 tree dependent_name
= NULL_TREE
;
8604 tree typedef_decl
= NULL_TREE
;
8605 const char *name
= NULL
;
8606 tree typedef_type
= NULL_TREE
;
8607 /* True if this declarator is a function definition. */
8608 bool funcdef_flag
= false;
8609 cp_declarator_kind innermost_code
= cdk_error
;
8612 /* See the code below that used this. */
8613 tree decl_attr
= NULL_TREE
;
8616 /* Keep track of what sort of function is being processed
8617 so that we can warn about default return values, or explicit
8618 return values which do not match prescribed defaults. */
8619 special_function_kind sfk
= sfk_none
;
8621 tree dname
= NULL_TREE
;
8622 tree ctor_return_type
= NULL_TREE
;
8623 enum overload_flags flags
= NO_SPECIAL
;
8624 /* cv-qualifiers that apply to the declarator, for a declaration of
8625 a member function. */
8626 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8627 /* virt-specifiers that apply to the declarator, for a declaration of
8628 a member function. */
8629 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8630 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8632 tree raises
= NULL_TREE
;
8633 int template_count
= 0;
8634 tree returned_attrs
= NULL_TREE
;
8635 tree parms
= NULL_TREE
;
8636 const cp_declarator
*id_declarator
;
8637 /* The unqualified name of the declarator; either an
8638 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8639 tree unqualified_id
;
8640 /* The class type, if any, in which this entity is located,
8641 or NULL_TREE if none. Note that this value may be different from
8642 the current class type; for example if an attempt is made to declare
8643 "A::f" inside "B", this value will be "A". */
8644 tree ctype
= current_class_type
;
8645 /* The NAMESPACE_DECL for the namespace in which this entity is
8646 located. If an unqualified name is used to declare the entity,
8647 this value will be NULL_TREE, even if the entity is located at
8649 tree in_namespace
= NULL_TREE
;
8650 cp_storage_class storage_class
;
8651 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8652 bool type_was_error_mark_node
= false;
8653 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8654 bool template_type_arg
= false;
8655 bool template_parm_flag
= false;
8656 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8659 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8660 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8661 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8662 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8663 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8664 explicit_int128
= declspecs
->explicit_int128_p
;
8665 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8667 if (decl_context
== FUNCDEF
)
8668 funcdef_flag
= true, decl_context
= NORMAL
;
8669 else if (decl_context
== MEMFUNCDEF
)
8670 funcdef_flag
= true, decl_context
= FIELD
;
8671 else if (decl_context
== BITFIELD
)
8672 bitfield
= 1, decl_context
= FIELD
;
8673 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8674 template_type_arg
= true, decl_context
= TYPENAME
;
8675 else if (decl_context
== TPARM
)
8676 template_parm_flag
= true, decl_context
= PARM
;
8678 if (initialized
> 1)
8679 funcdef_flag
= true;
8681 /* Look inside a declarator for the name being declared
8682 and get it as a string, for an error message. */
8683 for (id_declarator
= declarator
;
8685 id_declarator
= id_declarator
->declarator
)
8687 if (id_declarator
->kind
!= cdk_id
)
8688 innermost_code
= id_declarator
->kind
;
8690 switch (id_declarator
->kind
)
8693 if (id_declarator
->declarator
8694 && id_declarator
->declarator
->kind
== cdk_id
)
8696 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8697 if (sfk
== sfk_destructor
)
8704 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8705 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8708 if (qualifying_scope
)
8710 if (at_function_scope_p ())
8714 A declarator-id shall not be qualified except
8717 None of the cases are permitted in block
8719 if (qualifying_scope
== global_namespace
)
8720 error ("invalid use of qualified-name %<::%D%>",
8722 else if (TYPE_P (qualifying_scope
))
8723 error ("invalid use of qualified-name %<%T::%D%>",
8724 qualifying_scope
, decl
);
8726 error ("invalid use of qualified-name %<%D::%D%>",
8727 qualifying_scope
, decl
);
8728 return error_mark_node
;
8730 else if (TYPE_P (qualifying_scope
))
8732 ctype
= qualifying_scope
;
8733 if (!MAYBE_CLASS_TYPE_P (ctype
))
8735 error ("%q#T is not a class or a namespace", ctype
);
8738 else if (innermost_code
!= cdk_function
8739 && current_class_type
8740 && !uniquely_derived_from_p (ctype
,
8741 current_class_type
))
8743 error ("type %qT is not derived from type %qT",
8744 ctype
, current_class_type
);
8745 return error_mark_node
;
8748 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8749 in_namespace
= qualifying_scope
;
8751 switch (TREE_CODE (decl
))
8757 if (innermost_code
!= cdk_function
)
8759 error ("declaration of %qD as non-function", decl
);
8760 return error_mark_node
;
8762 else if (!qualifying_scope
8763 && !(current_class_type
&& at_class_scope_p ()))
8765 error ("declaration of %qD as non-member", decl
);
8766 return error_mark_node
;
8769 type
= TREE_OPERAND (decl
, 0);
8771 type
= constructor_name (type
);
8772 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8777 case TEMPLATE_ID_EXPR
:
8779 tree fns
= TREE_OPERAND (decl
, 0);
8782 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8784 gcc_assert (is_overloaded_fn (dname
));
8785 dname
= DECL_NAME (get_first_fn (dname
));
8790 case IDENTIFIER_NODE
:
8791 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8794 if (C_IS_RESERVED_WORD (dname
))
8796 error ("declarator-id missing; using reserved word %qD",
8798 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8800 else if (!IDENTIFIER_TYPENAME_P (dname
))
8801 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8804 gcc_assert (flags
== NO_SPECIAL
);
8805 flags
= TYPENAME_FLAG
;
8806 ctor_return_type
= TREE_TYPE (dname
);
8807 sfk
= sfk_conversion
;
8808 if (is_typename_at_global_scope (dname
))
8809 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8811 name
= "<invalid operator>";
8828 return error_mark_node
;
8833 if (id_declarator
->kind
== cdk_id
)
8839 The declarator in a function-definition shall have the form
8840 D1 ( parameter-declaration-clause) ... */
8841 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8843 error ("function definition does not declare parameters");
8844 return error_mark_node
;
8847 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8848 && innermost_code
!= cdk_function
8849 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8851 error ("declaration of %qD as non-function", dname
);
8852 return error_mark_node
;
8856 && TREE_CODE (dname
) == IDENTIFIER_NODE
8857 && UDLIT_OPER_P (dname
)
8858 && innermost_code
!= cdk_function
)
8860 error ("declaration of %qD as non-function", dname
);
8861 return error_mark_node
;
8864 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8866 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
8868 error ("declaration of %qD as %<typedef%>", dname
);
8869 return error_mark_node
;
8871 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8873 error ("declaration of %qD as parameter", dname
);
8874 return error_mark_node
;
8878 /* Anything declared one level down from the top level
8879 must be one of the parameters of a function
8880 (because the body is at least two levels down). */
8882 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8883 by not allowing C++ class definitions to specify their parameters
8884 with xdecls (must be spec.d in the parmlist).
8886 Since we now wait to push a class scope until we are sure that
8887 we are in a legitimate method context, we must set oldcname
8888 explicitly (since current_class_name is not yet alive).
8890 We also want to avoid calling this a PARM if it is in a namespace. */
8892 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8894 cp_binding_level
*b
= current_binding_level
;
8895 current_binding_level
= b
->level_chain
;
8896 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8897 decl_context
= PARM
;
8898 current_binding_level
= b
;
8902 name
= decl_context
== PARM
? "parameter" : "type name";
8904 if (constexpr_p
&& decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
8906 error ("%<constexpr%> cannot appear in a typedef declaration");
8907 return error_mark_node
;
8910 /* If there were multiple types specified in the decl-specifier-seq,
8911 issue an error message. */
8912 if (declspecs
->multiple_types_p
)
8914 error ("two or more data types in declaration of %qs", name
);
8915 return error_mark_node
;
8918 if (declspecs
->conflicting_specifiers_p
)
8920 error ("conflicting specifiers in declaration of %qs", name
);
8921 return error_mark_node
;
8924 /* Extract the basic type from the decl-specifier-seq. */
8925 type
= declspecs
->type
;
8926 if (type
== error_mark_node
)
8929 type_was_error_mark_node
= true;
8931 /* If the entire declaration is itself tagged as deprecated then
8932 suppress reports of deprecated items. */
8933 if (type
&& TREE_DEPRECATED (type
)
8934 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8935 warn_deprecated_use (type
, NULL_TREE
);
8936 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8938 typedef_decl
= type
;
8939 type
= TREE_TYPE (typedef_decl
);
8940 if (TREE_DEPRECATED (type
)
8941 && DECL_ARTIFICIAL (typedef_decl
)
8942 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8943 warn_deprecated_use (type
, NULL_TREE
);
8945 /* No type at all: default to `int', and set DEFAULTED_INT
8946 because it was not a user-defined typedef. */
8947 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8949 /* These imply 'int'. */
8950 type
= integer_type_node
;
8954 explicit_int
= declspecs
->explicit_int_p
;
8955 explicit_char
= declspecs
->explicit_char_p
;
8958 /* See the code below that used this. */
8960 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8962 typedef_type
= type
;
8965 if (sfk
!= sfk_conversion
)
8966 ctor_return_type
= ctype
;
8968 if (sfk
!= sfk_none
)
8969 type
= check_special_function_return_type (sfk
, type
,
8971 else if (type
== NULL_TREE
)
8977 /* We handle `main' specially here, because 'main () { }' is so
8978 common. With no options, it is allowed. With -Wreturn-type,
8979 it is a warning. It is only an error with -pedantic-errors. */
8980 is_main
= (funcdef_flag
8981 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8982 && MAIN_NAME_P (dname
)
8983 && ctype
== NULL_TREE
8984 && in_namespace
== NULL_TREE
8985 && current_namespace
== global_namespace
);
8987 if (type_was_error_mark_node
)
8988 /* We've already issued an error, don't complain more. */;
8989 else if (in_system_header
|| flag_ms_extensions
)
8990 /* Allow it, sigh. */;
8992 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8994 pedwarn (input_location
, OPT_Wpedantic
,
8995 "ISO C++ forbids declaration of %qs with no type", name
);
8997 warning (OPT_Wreturn_type
,
8998 "ISO C++ forbids declaration of %qs with no type", name
);
9000 type
= integer_type_node
;
9005 if (explicit_int128
)
9007 if (int128_integer_type_node
== NULL_TREE
)
9009 error ("%<__int128%> is not supported by this target");
9010 explicit_int128
= false;
9012 else if (pedantic
&& ! in_system_header
)
9013 pedwarn (input_location
, OPT_Wpedantic
,
9014 "ISO C++ does not support %<__int128%> for %qs", name
);
9017 /* Now process the modifiers that were specified
9018 and check for invalid combinations. */
9020 /* Long double is a special combination. */
9021 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9024 type
= cp_build_qualified_type (long_double_type_node
,
9025 cp_type_quals (type
));
9028 /* Check all other uses of type modifiers. */
9030 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9034 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9035 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9036 else if (signed_p
&& unsigned_p
)
9037 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9038 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9039 error ("%<long long%> invalid for %qs", name
);
9040 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9041 error ("%<long%> invalid for %qs", name
);
9042 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9043 error ("%<short%> invalid for %qs", name
);
9044 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9045 error ("%<long%> or %<short%> invalid for %qs", name
);
9046 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9047 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9048 else if ((long_p
|| short_p
) && explicit_char
)
9049 error ("%<long%> or %<short%> specified with char for %qs", name
);
9050 else if (long_p
&& short_p
)
9051 error ("%<long%> and %<short%> specified together for %qs", name
);
9052 else if (type
== char16_type_node
|| type
== char32_type_node
)
9054 if (signed_p
|| unsigned_p
)
9055 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9056 else if (short_p
|| long_p
)
9057 error ("%<short%> or %<long%> invalid for %qs", name
);
9062 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9064 pedwarn (input_location
, OPT_Wpedantic
,
9065 "long, short, signed or unsigned used invalidly for %qs",
9067 if (flag_pedantic_errors
)
9072 /* Discard the type modifiers if they are invalid. */
9083 /* Decide whether an integer type is signed or not.
9084 Optionally treat bitfields as signed by default. */
9088 It is implementation-defined whether a plain (neither
9089 explicitly signed or unsigned) char, short, int, or long
9090 bit-field is signed or unsigned.
9092 Naturally, we extend this to long long as well. Note that
9093 this does not include wchar_t. */
9094 || (bitfield
&& !flag_signed_bitfields
9096 /* A typedef for plain `int' without `signed' can be
9097 controlled just like plain `int', but a typedef for
9098 `signed int' cannot be so controlled. */
9100 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9101 && TREE_CODE (type
) == INTEGER_TYPE
9102 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9104 if (explicit_int128
)
9105 type
= int128_unsigned_type_node
;
9107 type
= long_long_unsigned_type_node
;
9109 type
= long_unsigned_type_node
;
9111 type
= short_unsigned_type_node
;
9112 else if (type
== char_type_node
)
9113 type
= unsigned_char_type_node
;
9114 else if (typedef_decl
)
9115 type
= unsigned_type_for (type
);
9117 type
= unsigned_type_node
;
9119 else if (signed_p
&& type
== char_type_node
)
9120 type
= signed_char_type_node
;
9121 else if (explicit_int128
)
9122 type
= int128_integer_type_node
;
9124 type
= long_long_integer_type_node
;
9126 type
= long_integer_type_node
;
9128 type
= short_integer_type_node
;
9130 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9132 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9133 error ("complex invalid for %qs", name
);
9134 /* If we just have "complex", it is equivalent to
9135 "complex double", but if any modifiers at all are specified it is
9136 the complex form of TYPE. E.g, "complex short" is
9137 "complex short int". */
9138 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9139 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9140 type
= complex_double_type_node
;
9141 else if (type
== integer_type_node
)
9142 type
= complex_integer_type_node
;
9143 else if (type
== float_type_node
)
9144 type
= complex_float_type_node
;
9145 else if (type
== double_type_node
)
9146 type
= complex_double_type_node
;
9147 else if (type
== long_double_type_node
)
9148 type
= complex_long_double_type_node
;
9150 type
= build_complex_type (type
);
9153 type_quals
= TYPE_UNQUALIFIED
;
9154 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9155 type_quals
|= TYPE_QUAL_CONST
;
9156 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9157 type_quals
|= TYPE_QUAL_VOLATILE
;
9158 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9159 type_quals
|= TYPE_QUAL_RESTRICT
;
9160 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9161 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9164 /* If we're using the injected-class-name to form a compound type or a
9165 declaration, replace it with the underlying class so we don't get
9166 redundant typedefs in the debug output. But if we are returning the
9167 type unchanged, leave it alone so that it's available to
9168 maybe_get_template_decl_from_type_decl. */
9169 if (CLASS_TYPE_P (type
)
9170 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9171 && type
== TREE_TYPE (TYPE_NAME (type
))
9172 && (declarator
|| type_quals
))
9173 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9175 type_quals
|= cp_type_quals (type
);
9176 type
= cp_build_qualified_type_real
9177 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9178 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9179 /* We might have ignored or rejected some of the qualifiers. */
9180 type_quals
= cp_type_quals (type
);
9183 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9184 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9185 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9187 storage_class
= declspecs
->storage_class
;
9188 if (storage_class
== sc_static
)
9189 staticp
= 1 + (decl_context
== FIELD
);
9191 if (virtualp
&& staticp
== 2)
9193 error ("member %qD cannot be declared both virtual and static", dname
);
9194 storage_class
= sc_none
;
9197 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9199 if (dependent_name
&& !friendp
)
9201 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
9202 return error_mark_node
;
9205 /* Issue errors about use of storage classes for parameters. */
9206 if (decl_context
== PARM
)
9208 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9210 error ("typedef declaration invalid in parameter declaration");
9211 return error_mark_node
;
9213 else if (template_parm_flag
&& storage_class
!= sc_none
)
9215 error ("storage class specified for template parameter %qs", name
);
9216 return error_mark_node
;
9218 else if (storage_class
== sc_static
9219 || storage_class
== sc_extern
9221 error ("storage class specifiers invalid in parameter declarations");
9223 /* Function parameters cannot be constexpr. If we saw one, moan
9224 and pretend it wasn't there. */
9227 error ("a parameter cannot be declared %<constexpr%>");
9232 /* Give error if `virtual' is used outside of class declaration. */
9234 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9236 error ("%<virtual%> outside class declaration");
9240 /* Static anonymous unions are dealt with here. */
9241 if (staticp
&& decl_context
== TYPENAME
9243 && ANON_AGGR_TYPE_P (declspecs
->type
))
9244 decl_context
= FIELD
;
9246 /* Warn about storage classes that are invalid for certain
9247 kinds of declarations (parameters, typenames, etc.). */
9250 && storage_class
!= sc_extern
9251 && storage_class
!= sc_static
)
9252 || decl_spec_seq_has_spec_p (declspecs
, ds_typedef
)))
9254 error ("multiple storage classes in declaration of %qs", name
);
9257 if (decl_context
!= NORMAL
9258 && ((storage_class
!= sc_none
9259 && storage_class
!= sc_mutable
)
9262 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9263 && (storage_class
== sc_register
9264 || storage_class
== sc_auto
))
9266 else if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9268 else if (decl_context
== FIELD
9269 /* C++ allows static class elements. */
9270 && storage_class
== sc_static
)
9271 /* C++ also allows inlines and signed and unsigned elements,
9272 but in those cases we don't come in here. */
9276 if (decl_context
== FIELD
)
9277 error ("storage class specified for %qs", name
);
9280 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9281 error ("storage class specified for parameter %qs", name
);
9283 error ("storage class specified for typename");
9285 if (storage_class
== sc_register
9286 || storage_class
== sc_auto
9287 || storage_class
== sc_extern
9289 storage_class
= sc_none
;
9292 else if (storage_class
== sc_extern
&& funcdef_flag
9293 && ! toplevel_bindings_p ())
9294 error ("nested function %qs declared %<extern%>", name
);
9295 else if (toplevel_bindings_p ())
9297 if (storage_class
== sc_auto
)
9298 error ("top-level declaration of %qs specifies %<auto%>", name
);
9301 && storage_class
!= sc_extern
9302 && storage_class
!= sc_static
)
9304 if (declspecs
->gnu_thread_keyword_p
)
9305 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9306 "declared %<__thread%>", name
);
9308 /* When thread_local is applied to a variable of block scope the
9309 storage-class-specifier static is implied if it does not appear
9311 storage_class
= declspecs
->storage_class
= sc_static
;
9315 if (storage_class
&& friendp
)
9317 error ("storage class specifiers invalid in friend function declarations");
9318 storage_class
= sc_none
;
9323 unqualified_id
= NULL_TREE
;
9326 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9327 switch (TREE_CODE (unqualified_id
))
9330 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9331 if (TYPE_P (unqualified_id
))
9332 unqualified_id
= constructor_name (unqualified_id
);
9335 case IDENTIFIER_NODE
:
9336 case TEMPLATE_ID_EXPR
:
9344 if (declspecs
->std_attributes
)
9346 /* Apply the c++11 attributes to the type preceding them. */
9347 source_location saved_loc
= input_location
;
9348 input_location
= declspecs
->locations
[ds_std_attribute
];
9349 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9350 input_location
= saved_loc
;
9353 /* Determine the type of the entity declared by recurring on the
9355 for (; declarator
; declarator
= declarator
->declarator
)
9357 const cp_declarator
*inner_declarator
;
9360 if (type
== error_mark_node
)
9361 return error_mark_node
;
9363 attrs
= declarator
->attributes
;
9369 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9370 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9371 if (declarator
->kind
== cdk_function
)
9372 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9373 if (declarator
->kind
== cdk_array
)
9374 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9375 returned_attrs
= decl_attributes (&type
,
9376 chainon (returned_attrs
, attrs
),
9380 if (declarator
->kind
== cdk_id
)
9383 inner_declarator
= declarator
->declarator
;
9385 switch (declarator
->kind
)
9388 type
= create_array_type_for_decl (dname
, type
,
9389 declarator
->u
.array
.bounds
);
9390 if (declarator
->std_attributes
)
9393 The optional attribute-specifier-seq appertains to the
9395 returned_attrs
= chainon (returned_attrs
,
9396 declarator
->std_attributes
);
9404 /* Declaring a function type.
9405 Make sure we have a valid type for the function to return. */
9407 if (type_quals
!= TYPE_UNQUALIFIED
)
9409 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9410 warning (OPT_Wignored_qualifiers
,
9411 "type qualifiers ignored on function return type");
9412 /* We now know that the TYPE_QUALS don't apply to the
9413 decl, but to its return type. */
9414 type_quals
= TYPE_UNQUALIFIED
;
9416 errmsg
= targetm
.invalid_return_type (type
);
9420 type
= integer_type_node
;
9423 /* Error about some types functions can't return. */
9425 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9427 error ("%qs declared as function returning a function", name
);
9428 return error_mark_node
;
9430 if (TREE_CODE (type
) == ARRAY_TYPE
)
9432 error ("%qs declared as function returning an array", name
);
9433 return error_mark_node
;
9435 /* When decl_context == NORMAL we emit a better error message
9436 later in abstract_virtuals_error. */
9437 if (decl_context
== TYPENAME
&& ABSTRACT_CLASS_TYPE_P (type
))
9438 error ("%qs declared as function returning an abstract "
9439 "class type", name
);
9441 /* Pick up type qualifiers which should be applied to `this'. */
9442 memfn_quals
= declarator
->u
.function
.qualifiers
;
9443 /* Pick up virt-specifiers. */
9444 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9445 /* Pick up the exception specifications. */
9446 raises
= declarator
->u
.function
.exception_specification
;
9447 /* If the exception-specification is ill-formed, let's pretend
9448 there wasn't one. */
9449 if (raises
== error_mark_node
)
9452 /* Say it's a definition only for the CALL_EXPR
9453 closest to the identifier. */
9454 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9456 /* Handle a late-specified return type. */
9459 if (type_uses_auto (type
))
9461 if (!declarator
->u
.function
.late_return_type
)
9463 if (current_class_type
9464 && LAMBDA_TYPE_P (current_class_type
))
9465 /* OK for C++11 lambdas. */;
9466 else if (cxx_dialect
< cxx1y
)
9467 pedwarn (input_location
, 0, "%qs function uses "
9468 "%<auto%> type specifier without trailing "
9469 "return type", name
);
9471 else if (!is_auto (type
))
9473 error ("%qs function with trailing return type has"
9474 " %qT as its type rather than plain %<auto%>",
9476 return error_mark_node
;
9479 else if (declarator
->u
.function
.late_return_type
)
9481 if (cxx_dialect
< cxx0x
)
9482 /* Not using maybe_warn_cpp0x because this should
9483 always be an error. */
9484 error ("trailing return type only available with "
9485 "-std=c++11 or -std=gnu++11");
9487 error ("%qs function with trailing return type not "
9488 "declared with %<auto%> type specifier", name
);
9489 return error_mark_node
;
9492 type
= splice_late_return_type
9493 (type
, declarator
->u
.function
.late_return_type
);
9494 if (type
== error_mark_node
)
9495 return error_mark_node
;
9497 if (ctype
== NULL_TREE
9498 && decl_context
== FIELD
9500 && (friendp
== 0 || dname
== current_class_name
))
9501 ctype
= current_class_type
;
9503 if (ctype
&& (sfk
== sfk_constructor
9504 || sfk
== sfk_destructor
))
9506 /* We are within a class's scope. If our declarator name
9507 is the same as the class name, and we are defining
9508 a function, then it is a constructor/destructor, and
9509 therefore returns a void type. */
9511 /* ISO C++ 12.4/2. A destructor may not be declared
9512 const or volatile. A destructor may not be
9515 ISO C++ 12.1. A constructor may not be declared
9516 const or volatile. A constructor may not be
9517 virtual. A constructor may not be static. */
9519 error ((flags
== DTOR_FLAG
)
9520 ? G_("destructor cannot be static member function")
9521 : G_("constructor cannot be static member function"));
9524 error ((flags
== DTOR_FLAG
)
9525 ? G_("destructors may not be cv-qualified")
9526 : G_("constructors may not be cv-qualified"));
9527 memfn_quals
= TYPE_UNQUALIFIED
;
9530 if (decl_context
== FIELD
9531 && !member_function_or_else (ctype
,
9534 return error_mark_node
;
9536 if (flags
!= DTOR_FLAG
)
9538 /* It's a constructor. */
9543 permerror (input_location
, "constructors cannot be declared virtual");
9546 if (decl_context
== FIELD
9547 && sfk
!= sfk_constructor
)
9548 return error_mark_node
;
9550 if (decl_context
== FIELD
)
9556 error ("can%'t initialize friend function %qs", name
);
9559 /* Cannot be both friend and virtual. */
9560 error ("virtual functions cannot be friends");
9563 if (decl_context
== NORMAL
)
9564 error ("friend declaration not in class definition");
9565 if (current_function_decl
&& funcdef_flag
)
9566 error ("can%'t define friend function %qs in a local "
9570 else if (ctype
&& sfk
== sfk_conversion
)
9574 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9579 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9582 if (inner_declarator
9583 && inner_declarator
->kind
== cdk_id
9584 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9585 && arg_types
!= void_list_node
)
9587 error ("destructors may not have parameters");
9588 arg_types
= void_list_node
;
9592 type
= build_function_type (type
, arg_types
);
9593 if (declarator
->std_attributes
)
9596 The optional attribute-specifier-seq appertains to
9597 the function type. */
9598 decl_attributes (&type
, declarator
->std_attributes
,
9606 /* Filter out pointers-to-references and references-to-references.
9607 We can get these if a TYPE_DECL is used. */
9609 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9611 if (declarator
->kind
!= cdk_reference
)
9613 error ("cannot declare pointer to %q#T", type
);
9614 type
= TREE_TYPE (type
);
9617 /* In C++0x, we allow reference to reference declarations
9618 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9619 and template type arguments [14.3.1/4 temp.arg.type]. The
9620 check for direct reference to reference declarations, which
9621 are still forbidden, occurs below. Reasoning behind the change
9622 can be found in DR106, DR540, and the rvalue reference
9624 else if (cxx_dialect
== cxx98
)
9626 error ("cannot declare reference to %q#T", type
);
9627 type
= TREE_TYPE (type
);
9630 else if (VOID_TYPE_P (type
))
9632 if (declarator
->kind
== cdk_reference
)
9633 error ("cannot declare reference to %q#T", type
);
9634 else if (declarator
->kind
== cdk_ptrmem
)
9635 error ("cannot declare pointer to %q#T member", type
);
9638 /* We now know that the TYPE_QUALS don't apply to the decl,
9639 but to the target of the pointer. */
9640 type_quals
= TYPE_UNQUALIFIED
;
9642 if (declarator
->kind
== cdk_ptrmem
9643 && (TREE_CODE (type
) == FUNCTION_TYPE
9644 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9646 memfn_quals
|= type_memfn_quals (type
);
9647 type
= build_memfn_type (type
,
9648 declarator
->u
.pointer
.class_type
,
9650 if (type
== error_mark_node
)
9651 return error_mark_node
;
9652 memfn_quals
= TYPE_UNQUALIFIED
;
9655 if (TREE_CODE (type
) == FUNCTION_TYPE
9656 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9657 error (declarator
->kind
== cdk_reference
9658 ? G_("cannot declare reference to qualified function type %qT")
9659 : G_("cannot declare pointer to qualified function type %qT"),
9662 /* When the pointed-to type involves components of variable size,
9663 care must be taken to ensure that the size evaluation code is
9664 emitted early enough to dominate all the possible later uses
9665 and late enough for the variables on which it depends to have
9668 This is expected to happen automatically when the pointed-to
9669 type has a name/declaration of it's own, but special attention
9670 is required if the type is anonymous.
9672 We handle the NORMAL and FIELD contexts here by inserting a
9673 dummy statement that just evaluates the size at a safe point
9674 and ensures it is not deferred until e.g. within a deeper
9675 conditional context (c++/43555).
9677 We expect nothing to be needed here for PARM or TYPENAME.
9678 Evaluating the size at this point for TYPENAME would
9679 actually be incorrect, as we might be in the middle of an
9680 expression with side effects on the pointed-to type size
9681 "arguments" prior to the pointer declaration point and the
9682 size evaluation could end up prior to the side effects. */
9684 if (!TYPE_NAME (type
)
9685 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9686 && at_function_scope_p ()
9687 && variably_modified_type_p (type
, NULL_TREE
))
9689 /* First break out any side-effects. */
9690 stabilize_vla_size (TYPE_SIZE (type
));
9691 /* And then force evaluation of the SAVE_EXPR. */
9692 finish_expr_stmt (TYPE_SIZE (type
));
9695 if (declarator
->kind
== cdk_reference
)
9697 /* In C++0x, the type we are creating a reference to might be
9698 a typedef which is itself a reference type. In that case,
9699 we follow the reference collapsing rules in
9700 [7.1.3/8 dcl.typedef] to create the final reference type:
9702 "If a typedef TD names a type that is a reference to a type
9703 T, an attempt to create the type 'lvalue reference to cv TD'
9704 creates the type 'lvalue reference to T,' while an attempt
9705 to create the type "rvalue reference to cv TD' creates the
9708 if (VOID_TYPE_P (type
))
9709 /* We already gave an error. */;
9710 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9712 if (declarator
->u
.reference
.rvalue_ref
)
9713 /* Leave type alone. */;
9715 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9718 type
= cp_build_reference_type
9719 (type
, declarator
->u
.reference
.rvalue_ref
);
9721 /* In C++0x, we need this check for direct reference to
9722 reference declarations, which are forbidden by
9723 [8.3.2/5 dcl.ref]. Reference to reference declarations
9724 are only allowed indirectly through typedefs and template
9725 type arguments. Example:
9727 void foo(int & &); // invalid ref-to-ref decl
9729 typedef int & int_ref;
9730 void foo(int_ref &); // valid ref-to-ref decl
9732 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9733 error ("cannot declare reference to %q#T, which is not "
9734 "a typedef or a template type argument", type
);
9736 else if (TREE_CODE (type
) == METHOD_TYPE
)
9737 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9738 else if (declarator
->kind
== cdk_ptrmem
)
9740 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9742 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9743 /* We will already have complained. */
9744 type
= error_mark_node
;
9746 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9750 type
= build_pointer_type (type
);
9752 /* Process a list of type modifier keywords (such as
9753 const or volatile) that were given inside the `*' or `&'. */
9755 if (declarator
->u
.pointer
.qualifiers
)
9758 = cp_build_qualified_type (type
,
9759 declarator
->u
.pointer
.qualifiers
);
9760 type_quals
= cp_type_quals (type
);
9763 /* Apply C++11 attributes to the pointer, and not to the
9764 type pointed to. This is unlike what is done for GNU
9765 attributes above. It is to comply with [dcl.ptr]/1:
9767 [the optional attribute-specifier-seq (7.6.1) appertains
9768 to the pointer and not to the object pointed to]. */
9769 if (declarator
->std_attributes
)
9770 decl_attributes (&type
, declarator
->std_attributes
,
9784 /* We need to stabilize side-effects in VLA sizes for regular array
9785 declarations too, not just pointers to arrays. */
9786 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9787 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9788 && at_function_scope_p ()
9789 && variably_modified_type_p (type
, NULL_TREE
))
9790 stabilize_vla_size (TYPE_SIZE (type
));
9792 /* A `constexpr' specifier used in an object declaration declares
9793 the object as `const'. */
9794 if (constexpr_p
&& innermost_code
!= cdk_function
)
9796 if (type_quals
& TYPE_QUAL_VOLATILE
)
9797 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9798 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9800 type_quals
|= TYPE_QUAL_CONST
;
9801 type
= cp_build_qualified_type (type
, type_quals
);
9805 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9806 && TREE_CODE (type
) != FUNCTION_TYPE
9807 && TREE_CODE (type
) != METHOD_TYPE
)
9809 error ("template-id %qD used as a declarator",
9811 unqualified_id
= dname
;
9814 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9815 qualified with a class-name, turn it into a METHOD_TYPE, unless
9816 we know that the function is static. We take advantage of this
9817 opportunity to do other processing that pertains to entities
9818 explicitly declared to be class members. Note that if DECLARATOR
9819 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9820 would not have exited the loop above. */
9822 && declarator
->u
.id
.qualifying_scope
9823 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9825 ctype
= declarator
->u
.id
.qualifying_scope
;
9826 ctype
= TYPE_MAIN_VARIANT (ctype
);
9827 template_count
= num_template_headers_for_class (ctype
);
9829 if (ctype
== current_class_type
)
9833 permerror (input_location
, "member functions are implicitly friends of their class");
9837 permerror (declarator
->id_loc
,
9838 "extra qualification %<%T::%> on member %qs",
9841 else if (/* If the qualifying type is already complete, then we
9842 can skip the following checks. */
9843 !COMPLETE_TYPE_P (ctype
)
9844 && (/* If the function is being defined, then
9845 qualifying type must certainly be complete. */
9847 /* A friend declaration of "T::f" is OK, even if
9848 "T" is a template parameter. But, if this
9849 function is not a friend, the qualifying type
9851 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9852 /* For a declaration, the type need not be
9853 complete, if either it is dependent (since there
9854 is no meaningful definition of complete in that
9855 case) or the qualifying class is currently being
9857 || !(dependent_type_p (ctype
)
9858 || currently_open_class (ctype
)))
9859 /* Check that the qualifying type is complete. */
9860 && !complete_type_or_else (ctype
, NULL_TREE
))
9861 return error_mark_node
;
9862 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9864 if (current_class_type
9865 && (!friendp
|| funcdef_flag
))
9868 ? G_("cannot define member function %<%T::%s%> "
9870 : G_("cannot declare member function %<%T::%s%> "
9872 ctype
, name
, current_class_type
);
9873 return error_mark_node
;
9876 else if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
)
9877 && current_class_type
)
9879 error ("cannot declare member %<%T::%s%> within %qT",
9880 ctype
, name
, current_class_type
);
9881 return error_mark_node
;
9885 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9886 ctype
= current_class_type
;
9888 /* Now TYPE has the actual type. */
9893 *attrlist
= chainon (returned_attrs
, *attrlist
);
9895 attrlist
= &returned_attrs
;
9899 && declarator
->kind
== cdk_id
9900 && declarator
->std_attributes
)
9901 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
9902 a declarator-id appertains to the entity that is declared. */
9903 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
9905 /* Handle parameter packs. */
9906 if (parameter_pack_p
)
9908 if (decl_context
== PARM
)
9909 /* Turn the type into a pack expansion.*/
9910 type
= make_pack_expansion (type
);
9912 error ("non-parameter %qs cannot be a parameter pack", name
);
9915 /* Did array size calculations overflow or does the array cover more
9916 than half of the address-space? */
9917 if (TREE_CODE (type
) == ARRAY_TYPE
9918 && COMPLETE_TYPE_P (type
)
9919 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9920 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
9922 error ("size of array %qs is too large", name
);
9923 /* If we proceed with the array type as it is, we'll eventually
9924 crash in tree_low_cst(). */
9925 type
= error_mark_node
;
9928 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9929 && !processing_template_decl
9930 && variably_modified_type_p (type
, NULL_TREE
))
9932 if (decl_context
== FIELD
)
9933 error ("data member may not have variably modified type %qT", type
);
9935 error ("parameter may not have variably modified type %qT", type
);
9936 type
= error_mark_node
;
9939 if (explicitp
== 1 || (explicitp
&& friendp
))
9941 /* [dcl.fct.spec] The explicit specifier shall only be used in
9942 declarations of constructors within a class definition. */
9943 error ("only declarations of constructors can be %<explicit%>");
9947 if (storage_class
== sc_mutable
)
9949 if (decl_context
!= FIELD
|| friendp
)
9951 error ("non-member %qs cannot be declared %<mutable%>", name
);
9952 storage_class
= sc_none
;
9954 else if (decl_context
== TYPENAME
9955 || decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9957 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9958 storage_class
= sc_none
;
9960 else if (TREE_CODE (type
) == FUNCTION_TYPE
9961 || TREE_CODE (type
) == METHOD_TYPE
)
9963 error ("function %qs cannot be declared %<mutable%>", name
);
9964 storage_class
= sc_none
;
9968 error ("static %qs cannot be declared %<mutable%>", name
);
9969 storage_class
= sc_none
;
9971 else if (type_quals
& TYPE_QUAL_CONST
)
9973 error ("const %qs cannot be declared %<mutable%>", name
);
9974 storage_class
= sc_none
;
9976 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9978 permerror (input_location
, "reference %qs cannot be declared "
9979 "%<mutable%>", name
);
9980 storage_class
= sc_none
;
9984 /* If this is declaring a typedef name, return a TYPE_DECL. */
9985 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
) && decl_context
!= TYPENAME
)
9989 /* Note that the grammar rejects storage classes
9990 in typenames, fields or parameters. */
9991 if (current_lang_name
== lang_name_java
)
9992 TYPE_FOR_JAVA (type
) = 1;
9994 /* This declaration:
9996 typedef void f(int) const;
9998 declares a function type which is not a member of any
9999 particular class, but which is cv-qualified; for
10000 example "f S::*" declares a pointer to a const-qualified
10001 member function of S. We record the cv-qualification in the
10003 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10005 type
= apply_memfn_quals (type
, memfn_quals
);
10007 /* We have now dealt with these qualifiers. */
10008 memfn_quals
= TYPE_UNQUALIFIED
;
10011 if (type_uses_auto (type
))
10013 error ("typedef declared %<auto%>");
10014 type
= error_mark_node
;
10017 if (decl_context
== FIELD
)
10018 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10020 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10021 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10022 error_at (DECL_SOURCE_LOCATION (decl
),
10023 "typedef name may not be a nested-name-specifier");
10024 TREE_TYPE (decl
) = error_mark_node
;
10027 if (decl_context
!= FIELD
)
10029 if (!current_function_decl
)
10030 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10031 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10032 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10033 (current_function_decl
)))
10034 /* The TYPE_DECL is "abstract" because there will be
10035 clones of this constructor/destructor, and there will
10036 be copies of this TYPE_DECL generated in those
10038 DECL_ABSTRACT (decl
) = 1;
10040 else if (current_class_type
10041 && constructor_name_p (unqualified_id
, current_class_type
))
10042 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10043 "as enclosing class",
10046 /* If the user declares "typedef struct {...} foo" then the
10047 struct will have an anonymous name. Fill that name in now.
10048 Nothing can refer to it, so nothing needs know about the name
10050 if (type
!= error_mark_node
10052 && TYPE_NAME (type
)
10053 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10054 && TYPE_ANONYMOUS_P (type
)
10055 && declspecs
->type_definition_p
10056 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10060 /* Replace the anonymous name with the real name everywhere. */
10061 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10063 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10064 /* We do not rename the debug info representing the
10065 anonymous tagged type because the standard says in
10066 [dcl.typedef] that the naming applies only for
10067 linkage purposes. */
10068 /*debug_hooks->set_name (t, decl);*/
10069 TYPE_NAME (t
) = decl
;
10072 if (TYPE_LANG_SPECIFIC (type
))
10073 TYPE_WAS_ANONYMOUS (type
) = 1;
10075 /* If this is a typedef within a template class, the nested
10076 type is a (non-primary) template. The name for the
10077 template needs updating as well. */
10078 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10079 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10080 = TYPE_IDENTIFIER (type
);
10082 /* Adjust linkage now that we aren't anonymous anymore. */
10083 reset_type_linkage (type
);
10085 /* FIXME remangle member functions; member functions of a
10086 type with external linkage have external linkage. */
10090 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10091 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10093 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10094 memfn_quals
!= TYPE_UNQUALIFIED
,
10095 inlinep
, friendp
, raises
!= NULL_TREE
);
10097 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10098 /* Acknowledge that this was written:
10099 `using analias = atype;'. */
10100 TYPE_DECL_ALIAS_P (decl
) = 1;
10105 /* Detect the case of an array type of unspecified size
10106 which came, as such, direct from a typedef name.
10107 We must copy the type, so that the array's domain can be
10108 individually set by the object's initializer. */
10110 if (type
&& typedef_type
10111 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10112 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10113 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10115 /* Detect where we're using a typedef of function type to declare a
10116 function. PARMS will not be set, so we must create it now. */
10118 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10120 tree decls
= NULL_TREE
;
10123 for (args
= TYPE_ARG_TYPES (type
);
10124 args
&& args
!= void_list_node
;
10125 args
= TREE_CHAIN (args
))
10127 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10129 DECL_CHAIN (decl
) = decls
;
10133 parms
= nreverse (decls
);
10135 if (decl_context
!= TYPENAME
)
10137 /* A cv-qualifier-seq shall only be part of the function type
10138 for a non-static member function. [8.3.5/4 dcl.fct] */
10139 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10140 && (current_class_type
== NULL_TREE
|| staticp
) )
10143 ? G_("qualified function types cannot be used to "
10144 "declare static member functions")
10145 : G_("qualified function types cannot be used to "
10146 "declare free functions"));
10147 type
= TYPE_MAIN_VARIANT (type
);
10150 /* The qualifiers on the function type become the qualifiers on
10151 the non-static member function. */
10152 memfn_quals
|= type_memfn_quals (type
);
10153 type_quals
= TYPE_UNQUALIFIED
;
10157 /* If this is a type name (such as, in a cast or sizeof),
10158 compute the type and return it now. */
10160 if (decl_context
== TYPENAME
)
10162 /* Note that the grammar rejects storage classes
10163 in typenames, fields or parameters. */
10164 if (type_quals
!= TYPE_UNQUALIFIED
)
10165 type_quals
= TYPE_UNQUALIFIED
;
10167 /* Special case: "friend class foo" looks like a TYPENAME context. */
10170 if (type_quals
!= TYPE_UNQUALIFIED
)
10172 error ("type qualifiers specified for friend class declaration");
10173 type_quals
= TYPE_UNQUALIFIED
;
10177 error ("%<inline%> specified for friend class declaration");
10183 /* Don't allow friend declaration without a class-key. */
10184 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10185 permerror (input_location
, "template parameters cannot be friends");
10186 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10187 permerror (input_location
, "friend declaration requires class-key, "
10188 "i.e. %<friend class %T::%D%>",
10189 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10191 permerror (input_location
, "friend declaration requires class-key, "
10192 "i.e. %<friend %#T%>",
10196 /* Only try to do this stuff if we didn't already give up. */
10197 if (type
!= integer_type_node
)
10199 /* A friendly class? */
10200 if (current_class_type
)
10201 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10202 /*complain=*/true);
10204 error ("trying to make class %qT a friend of global scope",
10207 type
= void_type_node
;
10210 else if (memfn_quals
)
10212 if (ctype
== NULL_TREE
10213 && TREE_CODE (type
) == METHOD_TYPE
)
10214 ctype
= TYPE_METHOD_BASETYPE (type
);
10217 type
= build_memfn_type (type
, ctype
, memfn_quals
);
10218 /* Core issue #547: need to allow this in template type args. */
10219 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10220 type
= apply_memfn_quals (type
, memfn_quals
);
10222 error ("invalid qualifiers on non-member function type");
10227 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10228 && decl_context
!= CATCHPARM
10229 && TREE_CODE (type
) != UNION_TYPE
10232 error ("abstract declarator %qT used as declaration", type
);
10233 return error_mark_node
;
10236 /* Only functions may be declared using an operator-function-id. */
10238 && IDENTIFIER_OPNAME_P (unqualified_id
)
10239 && TREE_CODE (type
) != FUNCTION_TYPE
10240 && TREE_CODE (type
) != METHOD_TYPE
)
10242 error ("declaration of %qD as non-function", unqualified_id
);
10243 return error_mark_node
;
10246 /* We don't check parameter types here because we can emit a better
10247 error message later. */
10248 if (decl_context
!= PARM
)
10250 type
= check_var_type (unqualified_id
, type
);
10251 if (type
== error_mark_node
)
10252 return error_mark_node
;
10255 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10256 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10258 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10260 if (ctype
|| in_namespace
)
10261 error ("cannot use %<::%> in parameter declaration");
10263 if (type_uses_auto (type
))
10265 error ("parameter declared %<auto%>");
10266 type
= error_mark_node
;
10269 /* A parameter declared as an array of T is really a pointer to T.
10270 One declared as a function is really a pointer to a function.
10271 One declared as a member is really a pointer to member. */
10273 if (TREE_CODE (type
) == ARRAY_TYPE
)
10275 /* Transfer const-ness of array into that of type pointed to. */
10276 type
= build_pointer_type (TREE_TYPE (type
));
10277 type_quals
= TYPE_UNQUALIFIED
;
10279 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10280 type
= build_pointer_type (type
);
10283 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10284 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10286 cp_cv_quals real_quals
= memfn_quals
;
10287 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10288 real_quals
|= TYPE_QUAL_CONST
;
10289 type
= build_memfn_type (type
, ctype
, real_quals
);
10295 if (decl_context
== PARM
)
10297 decl
= cp_build_parm_decl (unqualified_id
, type
);
10299 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10300 memfn_quals
!= TYPE_UNQUALIFIED
,
10301 inlinep
, friendp
, raises
!= NULL_TREE
);
10303 else if (decl_context
== FIELD
)
10305 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10306 && type_uses_auto (type
))
10308 error ("non-static data member declared %<auto%>");
10309 type
= error_mark_node
;
10312 /* The C99 flexible array extension. */
10313 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10314 && TYPE_DOMAIN (type
) == NULL_TREE
)
10316 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10317 tf_warning_or_error
);
10318 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10321 if (type
== error_mark_node
)
10323 /* Happens when declaring arrays of sizes which
10324 are error_mark_node, for example. */
10327 else if (in_namespace
&& !friendp
)
10329 /* Something like struct S { int N::j; }; */
10330 error ("invalid use of %<::%>");
10331 return error_mark_node
;
10333 else if (TREE_CODE (type
) == FUNCTION_TYPE
10334 || TREE_CODE (type
) == METHOD_TYPE
)
10337 tree function_context
;
10341 /* This should never happen in pure C++ (the check
10342 could be an assert). It could happen in
10343 Objective-C++ if someone writes invalid code that
10344 uses a function declaration for an instance
10345 variable or property (instance variables and
10346 properties are parsed as FIELD_DECLs, but they are
10347 part of an Objective-C class, not a C++ class).
10348 That code is invalid and is caught by this
10352 error ("declaration of function %qD in invalid context",
10354 return error_mark_node
;
10357 /* ``A union may [ ... ] not [ have ] virtual functions.''
10359 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10361 error ("function %qD declared virtual inside a union",
10363 return error_mark_node
;
10366 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10370 error ("%qD cannot be declared virtual, since it "
10371 "is always static",
10378 /* Check that the name used for a destructor makes sense. */
10379 if (sfk
== sfk_destructor
)
10381 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10385 gcc_assert (friendp
);
10386 error ("expected qualified name in friend declaration "
10387 "for destructor %qD", uqname
);
10388 return error_mark_node
;
10391 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10393 error ("declaration of %qD as member of %qT",
10395 return error_mark_node
;
10399 error ("a destructor cannot be %<constexpr%>");
10400 return error_mark_node
;
10403 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10405 error ("expected qualified name in friend declaration "
10406 "for constructor %qD",
10407 id_declarator
->u
.id
.unqualified_name
);
10408 return error_mark_node
;
10411 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10412 function_context
= (ctype
!= NULL_TREE
) ?
10413 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10414 publicp
= (! friendp
|| ! staticp
)
10415 && function_context
== NULL_TREE
;
10416 decl
= grokfndecl (ctype
, type
,
10417 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10418 ? unqualified_id
: dname
,
10421 virtualp
, flags
, memfn_quals
, raises
,
10422 friendp
? -1 : 0, friendp
, publicp
,
10423 inlinep
| (2 * constexpr_p
),
10425 funcdef_flag
, template_count
, in_namespace
,
10426 attrlist
, declarator
->id_loc
);
10427 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10428 if (decl
== NULL_TREE
)
10429 return error_mark_node
;
10431 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10432 /* The decl and setting of decl_attr is also turned off. */
10433 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10436 /* [class.conv.ctor]
10438 A constructor declared without the function-specifier
10439 explicit that can be called with a single parameter
10440 specifies a conversion from the type of its first
10441 parameter to the type of its class. Such a constructor
10442 is called a converting constructor. */
10443 if (explicitp
== 2)
10444 DECL_NONCONVERTING_P (decl
) = 1;
10446 else if (!staticp
&& !dependent_type_p (type
)
10447 && !COMPLETE_TYPE_P (complete_type (type
))
10448 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10450 if (unqualified_id
)
10451 error ("field %qD has incomplete type", unqualified_id
);
10453 error ("name %qT has incomplete type", type
);
10455 /* If we're instantiating a template, tell them which
10456 instantiation made the field's type be incomplete. */
10457 if (current_class_type
10458 && TYPE_NAME (current_class_type
)
10459 && IDENTIFIER_TEMPLATE (current_class_name
)
10461 && declspecs
->type
== type
)
10462 error (" in instantiation of template %qT",
10463 current_class_type
);
10465 return error_mark_node
;
10471 error ("%qE is neither function nor member function; "
10472 "cannot be declared friend", unqualified_id
);
10480 /* Friends are treated specially. */
10481 if (ctype
== current_class_type
)
10482 ; /* We already issued a permerror. */
10483 else if (decl
&& DECL_NAME (decl
))
10485 if (template_class_depth (current_class_type
) == 0)
10487 decl
= check_explicit_specialization
10488 (unqualified_id
, decl
, template_count
,
10489 2 * funcdef_flag
+ 4);
10490 if (decl
== error_mark_node
)
10491 return error_mark_node
;
10494 decl
= do_friend (ctype
, unqualified_id
, decl
,
10500 return error_mark_node
;
10503 /* Structure field. It may not be a function, except for C++. */
10505 if (decl
== NULL_TREE
)
10509 /* C++ allows static class members. All other work
10510 for this is done by grokfield. */
10511 decl
= build_lang_decl_loc (declarator
->id_loc
,
10512 VAR_DECL
, unqualified_id
, type
);
10513 set_linkage_for_static_data_member (decl
);
10514 /* Even if there is an in-class initialization, DECL
10515 is considered undefined until an out-of-class
10516 definition is provided. */
10517 DECL_EXTERNAL (decl
) = 1;
10521 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10522 if (declspecs
->gnu_thread_keyword_p
)
10523 DECL_GNU_TLS_P (decl
) = true;
10526 if (constexpr_p
&& !initialized
)
10528 error ("constexpr static data member %qD must have an "
10529 "initializer", decl
);
10530 constexpr_p
= false;
10537 error ("non-static data member %qE declared %<constexpr%>",
10539 constexpr_p
= false;
10541 decl
= build_decl (input_location
,
10542 FIELD_DECL
, unqualified_id
, type
);
10543 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10544 if (bitfield
&& !unqualified_id
)
10545 TREE_NO_WARNING (decl
) = 1;
10547 if (storage_class
== sc_mutable
)
10549 DECL_MUTABLE_P (decl
) = 1;
10550 storage_class
= sc_none
;
10555 /* An attempt is being made to initialize a non-static
10556 member. This is new in C++11. */
10557 maybe_warn_cpp0x (CPP0X_NSDMI
);
10559 /* If this has been parsed with static storage class, but
10560 errors forced staticp to be cleared, ensure NSDMI is
10562 if (declspecs
->storage_class
== sc_static
)
10563 DECL_INITIAL (decl
) = error_mark_node
;
10567 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10568 memfn_quals
!= TYPE_UNQUALIFIED
,
10569 inlinep
, friendp
, raises
!= NULL_TREE
);
10572 else if (TREE_CODE (type
) == FUNCTION_TYPE
10573 || TREE_CODE (type
) == METHOD_TYPE
)
10575 tree original_name
;
10578 if (!unqualified_id
)
10579 return error_mark_node
;
10581 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10582 original_name
= dname
;
10584 original_name
= unqualified_id
;
10586 if (storage_class
== sc_auto
)
10587 error ("storage class %<auto%> invalid for function %qs", name
);
10588 else if (storage_class
== sc_register
)
10589 error ("storage class %<register%> invalid for function %qs", name
);
10592 if (declspecs
->gnu_thread_keyword_p
)
10593 error ("storage class %<__thread%> invalid for function %qs",
10596 error ("storage class %<thread_local%> invalid for function %qs",
10600 if (virt_specifiers
)
10601 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10602 /* Function declaration not at top level.
10603 Storage classes other than `extern' are not allowed
10604 and `extern' makes no difference. */
10605 if (! toplevel_bindings_p ()
10606 && (storage_class
== sc_static
10607 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10610 if (storage_class
== sc_static
)
10611 pedwarn (input_location
, OPT_Wpedantic
,
10612 "%<static%> specified invalid for function %qs "
10613 "declared out of global scope", name
);
10615 pedwarn (input_location
, OPT_Wpedantic
,
10616 "%<inline%> specifier invalid for function %qs "
10617 "declared out of global scope", name
);
10620 if (ctype
== NULL_TREE
)
10624 error ("virtual non-class function %qs", name
);
10627 else if (sfk
== sfk_constructor
10628 || sfk
== sfk_destructor
)
10630 error (funcdef_flag
10631 ? G_("%qs defined in a non-class scope")
10632 : G_("%qs declared in a non-class scope"), name
);
10637 /* Record presence of `static'. */
10638 publicp
= (ctype
!= NULL_TREE
10639 || storage_class
== sc_extern
10640 || storage_class
!= sc_static
);
10642 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10643 virtualp
, flags
, memfn_quals
, raises
,
10645 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10647 template_count
, in_namespace
, attrlist
,
10648 declarator
->id_loc
);
10649 if (decl
== NULL_TREE
)
10650 return error_mark_node
;
10654 int invalid_static
= 0;
10656 /* Don't allow a static member function in a class, and forbid
10657 declaring main to be static. */
10658 if (TREE_CODE (type
) == METHOD_TYPE
)
10660 permerror (input_location
, "cannot declare member function %qD to have "
10661 "static linkage", decl
);
10662 invalid_static
= 1;
10664 else if (current_function_decl
)
10666 /* FIXME need arm citation */
10667 error ("cannot declare static function inside another function");
10668 invalid_static
= 1;
10671 if (invalid_static
)
10674 storage_class
= sc_none
;
10680 /* It's a variable. */
10682 /* An uninitialized decl with `extern' is a reference. */
10683 decl
= grokvardecl (type
, unqualified_id
,
10686 (type_quals
& TYPE_QUAL_CONST
) != 0,
10687 ctype
? ctype
: in_namespace
);
10688 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10689 memfn_quals
!= TYPE_UNQUALIFIED
,
10690 inlinep
, friendp
, raises
!= NULL_TREE
);
10694 DECL_CONTEXT (decl
) = ctype
;
10697 permerror (input_location
, "%<static%> may not be used when defining "
10698 "(as opposed to declaring) a static data member");
10700 storage_class
= sc_none
;
10702 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10704 error ("static member %qD declared %<register%>", decl
);
10705 storage_class
= sc_none
;
10707 if (storage_class
== sc_extern
&& pedantic
)
10709 pedwarn (input_location
, OPT_Wpedantic
,
10710 "cannot explicitly declare member %q#D to have "
10711 "extern linkage", decl
);
10712 storage_class
= sc_none
;
10715 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10717 error ("declaration of constexpr variable %qD is not a definition",
10719 constexpr_p
= false;
10723 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10725 if (toplevel_bindings_p ())
10727 /* It's common practice (and completely valid) to have a const
10728 be initialized and declared extern. */
10729 if (!(type_quals
& TYPE_QUAL_CONST
))
10730 warning (0, "%qs initialized and declared %<extern%>", name
);
10734 error ("%qs has both %<extern%> and initializer", name
);
10735 return error_mark_node
;
10739 /* Record `register' declaration for warnings on &
10740 and in case doing stupid register allocation. */
10742 if (storage_class
== sc_register
)
10743 DECL_REGISTER (decl
) = 1;
10744 else if (storage_class
== sc_extern
)
10745 DECL_THIS_EXTERN (decl
) = 1;
10746 else if (storage_class
== sc_static
)
10747 DECL_THIS_STATIC (decl
) = 1;
10749 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10750 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10751 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10753 /* Record constancy and volatility on the DECL itself . There's
10754 no need to do this when processing a template; we'll do this
10755 for the instantiated declaration based on the type of DECL. */
10756 if (!processing_template_decl
)
10757 cp_apply_type_quals_to_decl (type_quals
, decl
);
10763 /* Subroutine of start_function. Ensure that each of the parameter
10764 types (as listed in PARMS) is complete, as is required for a
10765 function definition. */
10768 require_complete_types_for_parms (tree parms
)
10770 for (; parms
; parms
= DECL_CHAIN (parms
))
10772 if (dependent_type_p (TREE_TYPE (parms
)))
10774 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10775 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10777 relayout_decl (parms
);
10778 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10781 /* grokparms or complete_type_or_else will have already issued
10783 TREE_TYPE (parms
) = error_mark_node
;
10787 /* Returns nonzero if T is a local variable. */
10790 local_variable_p (const_tree t
)
10792 if ((TREE_CODE (t
) == VAR_DECL
10793 /* A VAR_DECL with a context that is a _TYPE is a static data
10795 && !TYPE_P (CP_DECL_CONTEXT (t
))
10796 /* Any other non-local variable must be at namespace scope. */
10797 && !DECL_NAMESPACE_SCOPE_P (t
))
10798 || (TREE_CODE (t
) == PARM_DECL
))
10804 /* Like local_variable_p, but suitable for use as a tree-walking
10808 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10811 /* Check DECL_NAME to avoid including temporaries. We don't check
10812 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10813 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10815 else if (TYPE_P (*tp
))
10816 *walk_subtrees
= 0;
10821 /* Check that ARG, which is a default-argument expression for a
10822 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10823 something goes wrong. DECL may also be a _TYPE node, rather than a
10824 DECL, if there is no DECL available. */
10827 check_default_argument (tree decl
, tree arg
)
10832 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10833 /* We get a DEFAULT_ARG when looking at an in-class declaration
10834 with a default argument. Ignore the argument for now; we'll
10835 deal with it after the class is complete. */
10844 decl_type
= TREE_TYPE (decl
);
10846 if (arg
== error_mark_node
10847 || decl
== error_mark_node
10848 || TREE_TYPE (arg
) == error_mark_node
10849 || decl_type
== error_mark_node
)
10850 /* Something already went wrong. There's no need to check
10852 return error_mark_node
;
10854 /* [dcl.fct.default]
10856 A default argument expression is implicitly converted to the
10858 ++cp_unevaluated_operand
;
10859 perform_implicit_conversion_flags (decl_type
, arg
, tf_warning_or_error
,
10861 --cp_unevaluated_operand
;
10863 if (warn_zero_as_null_pointer_constant
10864 && c_inhibit_evaluation_warnings
== 0
10865 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10866 && null_ptr_cst_p (arg
)
10867 && !NULLPTR_TYPE_P (TREE_TYPE (arg
)))
10869 warning (OPT_Wzero_as_null_pointer_constant
,
10870 "zero as null pointer constant");
10871 return nullptr_node
;
10874 /* [dcl.fct.default]
10876 Local variables shall not be used in default argument
10879 The keyword `this' shall not be used in a default argument of a
10880 member function. */
10881 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10884 if (DECL_NAME (var
) == this_identifier
)
10885 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10887 error ("default argument %qE uses local variable %qD", arg
, var
);
10888 return error_mark_node
;
10895 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10898 type_is_deprecated (tree type
)
10900 enum tree_code code
;
10901 if (TREE_DEPRECATED (type
))
10903 if (TYPE_NAME (type
)
10904 && TREE_DEPRECATED (TYPE_NAME (type
)))
10907 /* Do warn about using typedefs to a deprecated class. */
10908 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10909 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10911 code
= TREE_CODE (type
);
10913 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10914 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10915 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10916 return type_is_deprecated (TREE_TYPE (type
));
10918 if (TYPE_PTRMEMFUNC_P (type
))
10919 return type_is_deprecated
10920 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10925 /* Decode the list of parameter types for a function type.
10926 Given the list of things declared inside the parens,
10927 return a list of types.
10929 If this parameter does not end with an ellipsis, we append
10932 *PARMS is set to the chain of PARM_DECLs created. */
10935 grokparms (tree parmlist
, tree
*parms
)
10937 tree result
= NULL_TREE
;
10938 tree decls
= NULL_TREE
;
10942 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10944 tree type
= NULL_TREE
;
10945 tree init
= TREE_PURPOSE (parm
);
10946 tree decl
= TREE_VALUE (parm
);
10947 const char *errmsg
;
10949 if (parm
== void_list_node
)
10952 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10955 type
= TREE_TYPE (decl
);
10956 if (VOID_TYPE_P (type
))
10958 if (same_type_p (type
, void_type_node
)
10959 && DECL_SELF_REFERENCE_P (type
)
10960 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10961 /* this is a parmlist of `(void)', which is ok. */
10963 cxx_incomplete_type_error (decl
, type
);
10964 /* It's not a good idea to actually create parameters of
10965 type `void'; other parts of the compiler assume that a
10966 void type terminates the parameter list. */
10967 type
= error_mark_node
;
10968 TREE_TYPE (decl
) = error_mark_node
;
10971 if (type
!= error_mark_node
10972 && TYPE_FOR_JAVA (type
)
10973 && MAYBE_CLASS_TYPE_P (type
))
10975 error ("parameter %qD has Java class type", decl
);
10976 type
= error_mark_node
;
10977 TREE_TYPE (decl
) = error_mark_node
;
10981 if (type
!= error_mark_node
10982 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10985 type
= error_mark_node
;
10986 TREE_TYPE (decl
) = error_mark_node
;
10989 if (type
!= error_mark_node
)
10991 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10993 tree deptype
= type_is_deprecated (type
);
10995 warn_deprecated_use (deptype
, NULL_TREE
);
10998 /* Top-level qualifiers on the parameters are
10999 ignored for function types. */
11000 type
= cp_build_qualified_type (type
, 0);
11001 if (TREE_CODE (type
) == METHOD_TYPE
)
11003 error ("parameter %qD invalidly declared method type", decl
);
11004 type
= build_pointer_type (type
);
11005 TREE_TYPE (decl
) = type
;
11007 else if (abstract_virtuals_error (decl
, type
))
11008 any_error
= 1; /* Seems like a good idea. */
11009 else if (POINTER_TYPE_P (type
))
11011 /* [dcl.fct]/6, parameter types cannot contain pointers
11012 (references) to arrays of unknown bound. */
11013 tree t
= TREE_TYPE (type
);
11014 int ptr
= TYPE_PTR_P (type
);
11018 if (TYPE_PTR_P (t
))
11020 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11022 else if (!TYPE_DOMAIN (t
))
11026 if (TREE_CODE (t
) == ARRAY_TYPE
)
11028 ? G_("parameter %qD includes pointer to array of "
11029 "unknown bound %qT")
11030 : G_("parameter %qD includes reference to array of "
11031 "unknown bound %qT"),
11037 else if (init
&& !processing_template_decl
)
11038 init
= check_default_argument (decl
, init
);
11041 DECL_CHAIN (decl
) = decls
;
11043 result
= tree_cons (init
, type
, result
);
11045 decls
= nreverse (decls
);
11046 result
= nreverse (result
);
11048 result
= chainon (result
, void_list_node
);
11055 /* D is a constructor or overloaded `operator='.
11057 Let T be the class in which D is declared. Then, this function
11060 -1 if D's is an ill-formed constructor or copy assignment operator
11061 whose first parameter is of type `T'.
11062 0 if D is not a copy constructor or copy assignment
11064 1 if D is a copy constructor or copy assignment operator whose
11065 first parameter is a reference to non-const qualified T.
11066 2 if D is a copy constructor or copy assignment operator whose
11067 first parameter is a reference to const qualified T.
11069 This function can be used as a predicate. Positive values indicate
11070 a copy constructor and nonzero values indicate a copy assignment
11074 copy_fn_p (const_tree d
)
11080 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11082 if (TREE_CODE (d
) == TEMPLATE_DECL
11083 || (DECL_TEMPLATE_INFO (d
)
11084 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11085 /* Instantiations of template member functions are never copy
11086 functions. Note that member functions of templated classes are
11087 represented as template functions internally, and we must
11088 accept those as copy functions. */
11091 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11095 arg_type
= TREE_VALUE (args
);
11096 if (arg_type
== error_mark_node
)
11099 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11101 /* Pass by value copy assignment operator. */
11104 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11105 && !TYPE_REF_IS_RVALUE (arg_type
)
11106 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11108 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11114 args
= TREE_CHAIN (args
);
11116 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11117 /* There are more non-optional args. */
11123 /* D is a constructor or overloaded `operator='.
11125 Let T be the class in which D is declared. Then, this function
11126 returns true when D is a move constructor or move assignment
11127 operator, false otherwise. */
11130 move_fn_p (const_tree d
)
11132 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11134 if (cxx_dialect
== cxx98
)
11135 /* There are no move constructors if we are in C++98 mode. */
11138 if (TREE_CODE (d
) == TEMPLATE_DECL
11139 || (DECL_TEMPLATE_INFO (d
)
11140 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11141 /* Instantiations of template member functions are never move
11142 functions. Note that member functions of templated classes are
11143 represented as template functions internally, and we must
11144 accept those as move functions. */
11147 return move_signature_fn_p (d
);
11150 /* D is a constructor or overloaded `operator='.
11152 Then, this function returns true when D has the same signature as a move
11153 constructor or move assignment operator (because either it is such a
11154 ctor/op= or it is a template specialization with the same signature),
11155 false otherwise. */
11158 move_signature_fn_p (const_tree d
)
11162 bool result
= false;
11164 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11168 arg_type
= TREE_VALUE (args
);
11169 if (arg_type
== error_mark_node
)
11172 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11173 && TYPE_REF_IS_RVALUE (arg_type
)
11174 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11178 args
= TREE_CHAIN (args
);
11180 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11181 /* There are more non-optional args. */
11187 /* Remember any special properties of member function DECL. */
11190 grok_special_member_properties (tree decl
)
11194 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11197 class_type
= DECL_CONTEXT (decl
);
11198 if (DECL_CONSTRUCTOR_P (decl
))
11200 int ctor
= copy_fn_p (decl
);
11202 if (!DECL_ARTIFICIAL (decl
))
11203 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11209 A non-template constructor for class X is a copy
11210 constructor if its first parameter is of type X&, const
11211 X&, volatile X& or const volatile X&, and either there
11212 are no other parameters or else all other parameters have
11213 default arguments. */
11214 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11215 if (user_provided_p (decl
))
11216 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11218 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11220 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11222 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11223 if (user_provided_p (decl
))
11224 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11226 else if (move_fn_p (decl
) && user_provided_p (decl
))
11227 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11228 else if (is_list_ctor (decl
))
11229 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11231 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11232 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11233 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11235 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11239 A non-template assignment operator for class X is a copy
11240 assignment operator if its parameter is of type X, X&, const
11241 X&, volatile X& or const volatile X&. */
11243 int assop
= copy_fn_p (decl
);
11247 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11248 if (user_provided_p (decl
))
11249 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11251 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11253 else if (move_fn_p (decl
) && user_provided_p (decl
))
11254 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11256 /* Destructors are handled in check_methods. */
11259 /* Check a constructor DECL has the correct form. Complains
11260 if the class has a constructor of the form X(X). */
11263 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11265 int ctor_parm
= copy_fn_p (decl
);
11271 A declaration of a constructor for a class X is ill-formed if
11272 its first parameter is of type (optionally cv-qualified) X
11273 and either there are no other parameters or else all other
11274 parameters have default arguments.
11276 We *don't* complain about member template instantiations that
11277 have this form, though; they can occur as we try to decide
11278 what constructor to use during overload resolution. Since
11279 overload resolution will never prefer such a constructor to
11280 the non-template copy constructor (which is either explicitly
11281 or implicitly defined), there's no need to worry about their
11282 existence. Theoretically, they should never even be
11283 instantiated, but that's hard to forestall. */
11284 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11292 /* An operator with this code is unary, but can also be binary. */
11295 ambi_op_p (enum tree_code code
)
11297 return (code
== INDIRECT_REF
11298 || code
== ADDR_EXPR
11299 || code
== UNARY_PLUS_EXPR
11300 || code
== NEGATE_EXPR
11301 || code
== PREINCREMENT_EXPR
11302 || code
== PREDECREMENT_EXPR
);
11305 /* An operator with this name can only be unary. */
11308 unary_op_p (enum tree_code code
)
11310 return (code
== TRUTH_NOT_EXPR
11311 || code
== BIT_NOT_EXPR
11312 || code
== COMPONENT_REF
11313 || code
== TYPE_EXPR
);
11316 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11317 errors are issued for invalid declarations. */
11320 grok_op_properties (tree decl
, bool complain
)
11322 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11324 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11325 tree name
= DECL_NAME (decl
);
11326 enum tree_code operator_code
;
11331 /* Count the number of arguments and check for ellipsis. */
11332 for (argtype
= argtypes
, arity
= 0;
11333 argtype
&& argtype
!= void_list_node
;
11334 argtype
= TREE_CHAIN (argtype
))
11336 ellipsis_p
= !argtype
;
11338 class_type
= DECL_CONTEXT (decl
);
11339 if (class_type
&& !CLASS_TYPE_P (class_type
))
11340 class_type
= NULL_TREE
;
11342 if (DECL_CONV_FN_P (decl
))
11343 operator_code
= TYPE_EXPR
;
11347 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11348 if (ansi_opname (CODE) == name) \
11350 operator_code = (CODE); \
11353 else if (ansi_assopname (CODE) == name) \
11355 operator_code = (CODE); \
11356 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11360 #include "operators.def"
11361 #undef DEF_OPERATOR
11363 gcc_unreachable ();
11366 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11367 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11370 switch (operator_code
)
11373 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11377 TYPE_GETS_DELETE (class_type
) |= 1;
11381 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11384 case VEC_DELETE_EXPR
:
11385 TYPE_GETS_DELETE (class_type
) |= 2;
11392 /* [basic.std.dynamic.allocation]/1:
11394 A program is ill-formed if an allocation function is declared
11395 in a namespace scope other than global scope or declared static
11398 The same also holds true for deallocation functions. */
11399 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11400 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11402 if (DECL_NAMESPACE_SCOPE_P (decl
))
11404 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11406 error ("%qD may not be declared within a namespace", decl
);
11409 else if (!TREE_PUBLIC (decl
))
11411 error ("%qD may not be declared as static", decl
);
11417 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11419 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11420 DECL_IS_OPERATOR_NEW (decl
) = 1;
11422 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11423 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11426 /* An operator function must either be a non-static member function
11427 or have at least one parameter of a class, a reference to a class,
11428 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11429 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11431 if (operator_code
== TYPE_EXPR
11432 || operator_code
== CALL_EXPR
11433 || operator_code
== COMPONENT_REF
11434 || operator_code
== ARRAY_REF
11435 || operator_code
== NOP_EXPR
)
11437 error ("%qD must be a nonstatic member function", decl
);
11444 if (DECL_STATIC_FUNCTION_P (decl
))
11446 error ("%qD must be either a non-static member "
11447 "function or a non-member function", decl
);
11451 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11453 tree arg
= non_reference (TREE_VALUE (p
));
11454 if (arg
== error_mark_node
)
11457 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11458 because these checks are performed even on
11459 template functions. */
11460 if (MAYBE_CLASS_TYPE_P (arg
)
11461 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11465 if (!p
|| p
== void_list_node
)
11468 error ("%qD must have an argument of class or "
11469 "enumerated type", decl
);
11475 /* There are no restrictions on the arguments to an overloaded
11477 if (operator_code
== CALL_EXPR
)
11480 /* Warn about conversion operators that will never be used. */
11481 if (IDENTIFIER_TYPENAME_P (name
)
11482 && ! DECL_TEMPLATE_INFO (decl
)
11484 /* Warn only declaring the function; there is no need to
11485 warn again about out-of-class definitions. */
11486 && class_type
== current_class_type
)
11488 tree t
= TREE_TYPE (name
);
11489 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11492 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11494 if (TREE_CODE (t
) == VOID_TYPE
)
11495 warning (OPT_Wconversion
,
11497 ? G_("conversion to a reference to void "
11498 "will never use a type conversion operator")
11499 : G_("conversion to void "
11500 "will never use a type conversion operator"));
11501 else if (class_type
)
11503 if (t
== class_type
)
11504 warning (OPT_Wconversion
,
11506 ? G_("conversion to a reference to the same type "
11507 "will never use a type conversion operator")
11508 : G_("conversion to the same type "
11509 "will never use a type conversion operator"));
11510 /* Don't force t to be complete here. */
11511 else if (MAYBE_CLASS_TYPE_P (t
)
11512 && COMPLETE_TYPE_P (t
)
11513 && DERIVED_FROM_P (t
, class_type
))
11514 warning (OPT_Wconversion
,
11516 ? G_("conversion to a reference to a base class "
11517 "will never use a type conversion operator")
11518 : G_("conversion to a base class "
11519 "will never use a type conversion operator"));
11524 if (operator_code
== COND_EXPR
)
11527 error ("ISO C++ prohibits overloading operator ?:");
11530 else if (ellipsis_p
)
11532 error ("%qD must not have variable number of arguments", decl
);
11535 else if (ambi_op_p (operator_code
))
11538 /* We pick the one-argument operator codes by default, so
11539 we don't have to change anything. */
11541 else if (arity
== 2)
11543 /* If we thought this was a unary operator, we now know
11544 it to be a binary operator. */
11545 switch (operator_code
)
11548 operator_code
= MULT_EXPR
;
11552 operator_code
= BIT_AND_EXPR
;
11555 case UNARY_PLUS_EXPR
:
11556 operator_code
= PLUS_EXPR
;
11560 operator_code
= MINUS_EXPR
;
11563 case PREINCREMENT_EXPR
:
11564 operator_code
= POSTINCREMENT_EXPR
;
11567 case PREDECREMENT_EXPR
:
11568 operator_code
= POSTDECREMENT_EXPR
;
11572 gcc_unreachable ();
11575 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11577 if ((operator_code
== POSTINCREMENT_EXPR
11578 || operator_code
== POSTDECREMENT_EXPR
)
11579 && ! processing_template_decl
11580 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11583 error ("postfix %qD must take %<int%> as its argument",
11586 error ("postfix %qD must take %<int%> as its second "
11594 error ("%qD must take either zero or one argument", decl
);
11596 error ("%qD must take either one or two arguments", decl
);
11600 /* More Effective C++ rule 6. */
11602 && (operator_code
== POSTINCREMENT_EXPR
11603 || operator_code
== POSTDECREMENT_EXPR
11604 || operator_code
== PREINCREMENT_EXPR
11605 || operator_code
== PREDECREMENT_EXPR
))
11607 tree arg
= TREE_VALUE (argtypes
);
11608 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11609 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11610 arg
= TREE_TYPE (arg
);
11611 arg
= TYPE_MAIN_VARIANT (arg
);
11612 if (operator_code
== PREINCREMENT_EXPR
11613 || operator_code
== PREDECREMENT_EXPR
)
11615 if (TREE_CODE (ret
) != REFERENCE_TYPE
11616 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11618 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11619 build_reference_type (arg
));
11623 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11624 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11628 else if (unary_op_p (operator_code
))
11633 error ("%qD must take %<void%>", decl
);
11635 error ("%qD must take exactly one argument", decl
);
11639 else /* if (binary_op_p (operator_code)) */
11644 error ("%qD must take exactly one argument", decl
);
11646 error ("%qD must take exactly two arguments", decl
);
11650 /* More Effective C++ rule 7. */
11652 && (operator_code
== TRUTH_ANDIF_EXPR
11653 || operator_code
== TRUTH_ORIF_EXPR
11654 || operator_code
== COMPOUND_EXPR
))
11655 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11659 /* Effective C++ rule 23. */
11662 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11663 && (operator_code
== PLUS_EXPR
11664 || operator_code
== MINUS_EXPR
11665 || operator_code
== TRUNC_DIV_EXPR
11666 || operator_code
== MULT_EXPR
11667 || operator_code
== TRUNC_MOD_EXPR
)
11668 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11669 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11671 /* [over.oper]/8 */
11672 for (; argtypes
&& argtypes
!= void_list_node
;
11673 argtypes
= TREE_CHAIN (argtypes
))
11674 if (TREE_PURPOSE (argtypes
))
11676 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11677 if (operator_code
== POSTINCREMENT_EXPR
11678 || operator_code
== POSTDECREMENT_EXPR
)
11680 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11685 error ("%qD cannot have default arguments", decl
);
11693 /* Return a string giving the keyword associate with CODE. */
11695 static const char *
11696 tag_name (enum tag_types code
)
11708 case typename_type
:
11711 gcc_unreachable ();
11715 /* Name lookup in an elaborated-type-specifier (after the keyword
11716 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11717 elaborated-type-specifier is invalid, issue a diagnostic and return
11718 error_mark_node; otherwise, return the *_TYPE to which it referred.
11719 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11722 check_elaborated_type_specifier (enum tag_types tag_code
,
11724 bool allow_template_p
)
11728 if (decl
== error_mark_node
)
11729 return error_mark_node
;
11733 struct S { struct S *p; };
11735 name lookup will find the TYPE_DECL for the implicit "S::S"
11736 typedef. Adjust for that here. */
11737 if (DECL_SELF_REFERENCE_P (decl
))
11738 decl
= TYPE_NAME (TREE_TYPE (decl
));
11740 type
= TREE_TYPE (decl
);
11742 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11743 is false for this case as well. */
11744 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11746 error ("using template type parameter %qT after %qs",
11747 type
, tag_name (tag_code
));
11748 return error_mark_node
;
11750 /* Accept template template parameters. */
11751 else if (allow_template_p
11752 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11753 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11757 If the identifier resolves to a typedef-name or the
11758 simple-template-id resolves to an alias template
11759 specialization, the elaborated-type-specifier is ill-formed.
11761 In other words, the only legitimate declaration to use in the
11762 elaborated type specifier is the implicit typedef created when
11763 the type is declared. */
11764 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11765 && !DECL_SELF_REFERENCE_P (decl
)
11766 && tag_code
!= typename_type
)
11768 if (alias_template_specialization_p (type
))
11769 error ("using alias template specialization %qT after %qs",
11770 type
, tag_name (tag_code
));
11772 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11773 inform (DECL_SOURCE_LOCATION (decl
),
11774 "%qD has a previous declaration here", decl
);
11775 return error_mark_node
;
11777 else if (TREE_CODE (type
) != RECORD_TYPE
11778 && TREE_CODE (type
) != UNION_TYPE
11779 && tag_code
!= enum_type
11780 && tag_code
!= typename_type
)
11782 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11783 error ("%q+T has a previous declaration here", type
);
11784 return error_mark_node
;
11786 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11787 && tag_code
== enum_type
)
11789 error ("%qT referred to as enum", type
);
11790 error ("%q+T has a previous declaration here", type
);
11791 return error_mark_node
;
11793 else if (!allow_template_p
11794 && TREE_CODE (type
) == RECORD_TYPE
11795 && CLASSTYPE_IS_TEMPLATE (type
))
11797 /* If a class template appears as elaborated type specifier
11798 without a template header such as:
11800 template <class T> class C {};
11801 void f(class C); // No template header here
11803 then the required template argument is missing. */
11804 error ("template argument required for %<%s %T%>",
11805 tag_name (tag_code
),
11806 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11807 return error_mark_node
;
11813 /* Lookup NAME in elaborate type specifier in scope according to
11814 SCOPE and issue diagnostics if necessary.
11815 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11816 found, and ERROR_MARK_NODE for type error. */
11819 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11820 tag_scope scope
, bool template_header_p
)
11824 if (scope
== ts_global
)
11826 /* First try ordinary name lookup, ignoring hidden class name
11827 injected via friend declaration. */
11828 decl
= lookup_name_prefer_type (name
, 2);
11829 /* If that fails, the name will be placed in the smallest
11830 non-class, non-function-prototype scope according to 3.3.1/5.
11831 We may already have a hidden name declared as friend in this
11832 scope. So lookup again but not ignoring hidden names.
11833 If we find one, that name will be made visible rather than
11834 creating a new tag. */
11836 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11839 decl
= lookup_type_scope (name
, scope
);
11842 && (DECL_CLASS_TEMPLATE_P (decl
)
11843 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11844 decl
= DECL_TEMPLATE_RESULT (decl
);
11846 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11848 /* Look for invalid nested type:
11852 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11854 error ("%qD has the same name as the class in which it is "
11857 return error_mark_node
;
11860 /* Two cases we need to consider when deciding if a class
11861 template is allowed as an elaborated type specifier:
11862 1. It is a self reference to its own class.
11863 2. It comes with a template header.
11867 template <class T> class C {
11868 class C *c1; // DECL_SELF_REFERENCE_P is true
11871 template <class U> class C; // template_header_p is true
11872 template <class T> class C<T>::D {
11873 class C *c2; // DECL_SELF_REFERENCE_P is true
11876 t
= check_elaborated_type_specifier (tag_code
,
11879 | DECL_SELF_REFERENCE_P (decl
));
11882 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11884 error ("reference to %qD is ambiguous", name
);
11885 print_candidates (decl
);
11886 return error_mark_node
;
11892 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11893 Define the tag as a forward-reference if it is not defined.
11895 If a declaration is given, process it here, and report an error if
11896 multiple declarations are not identical.
11898 SCOPE is TS_CURRENT when this is also a definition. Only look in
11899 the current frame for the name (since C++ allows new names in any
11900 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11901 declaration. Only look beginning from the current scope outward up
11902 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11904 TEMPLATE_HEADER_P is true when this declaration is preceded by
11905 a set of template parameters. */
11908 xref_tag_1 (enum tag_types tag_code
, tree name
,
11909 tag_scope scope
, bool template_header_p
)
11911 enum tree_code code
;
11913 tree context
= NULL_TREE
;
11915 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11921 code
= RECORD_TYPE
;
11927 code
= ENUMERAL_TYPE
;
11930 gcc_unreachable ();
11933 /* In case of anonymous name, xref_tag is only called to
11934 make type node and push name. Name lookup is not required. */
11935 if (ANON_AGGRNAME_P (name
))
11938 t
= lookup_and_check_tag (tag_code
, name
,
11939 scope
, template_header_p
);
11941 if (t
== error_mark_node
)
11942 return error_mark_node
;
11944 if (scope
!= ts_current
&& t
&& current_class_type
11945 && template_class_depth (current_class_type
)
11946 && template_header_p
)
11948 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
11951 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11952 definition of this tag. Since, in addition, we are currently
11953 processing a (member) template declaration of a template
11954 class, we must be very careful; consider:
11961 { template <class V>
11962 friend struct S1; };
11964 Here, the S2::S1 declaration should not be confused with the
11965 outer declaration. In particular, the inner version should
11966 have a template parameter of level 2, not level 1. This
11967 would be particularly important if the member declaration
11970 template <class V = U> friend struct S1;
11972 say, when we should tsubst into `U' when instantiating
11973 S2. On the other hand, when presented with:
11983 we must find the inner binding eventually. We
11984 accomplish this by making sure that the new type we
11985 create to represent this declaration has the right
11987 context
= TYPE_CONTEXT (t
);
11993 /* If no such tag is yet defined, create a forward-reference node
11994 and record it as the "definition".
11995 When a real declaration of this type is found,
11996 the forward-reference will be altered into a real type. */
11997 if (code
== ENUMERAL_TYPE
)
11999 error ("use of enum %q#D without previous declaration", name
);
12000 return error_mark_node
;
12004 t
= make_class_type (code
);
12005 TYPE_CONTEXT (t
) = context
;
12006 t
= pushtag (name
, t
, scope
);
12011 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12013 if (!redeclare_class_template (t
, current_template_parms
))
12014 return error_mark_node
;
12016 else if (!processing_template_decl
12017 && CLASS_TYPE_P (t
)
12018 && CLASSTYPE_IS_TEMPLATE (t
))
12020 error ("redeclaration of %qT as a non-template", t
);
12021 error ("previous declaration %q+D", t
);
12022 return error_mark_node
;
12025 /* Make injected friend class visible. */
12026 if (scope
!= ts_within_enclosing_non_class
12027 && hidden_name_p (TYPE_NAME (t
)))
12029 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12030 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12032 if (TYPE_TEMPLATE_INFO (t
))
12034 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12035 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12043 /* Wrapper for xref_tag_1. */
12046 xref_tag (enum tag_types tag_code
, tree name
,
12047 tag_scope scope
, bool template_header_p
)
12051 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12052 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12053 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12059 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12061 enum tag_types tag_kind
;
12063 if (TREE_CODE (old
) == RECORD_TYPE
)
12064 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12066 tag_kind
= union_type
;
12068 if (id
== NULL_TREE
)
12069 id
= TYPE_IDENTIFIER (old
);
12071 return xref_tag (tag_kind
, id
, scope
, false);
12074 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12075 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12076 access_* node, and the TREE_VALUE is the type of the base-class.
12077 Non-NULL TREE_TYPE indicates virtual inheritance.
12079 Returns true if the binfo hierarchy was successfully created,
12080 false if an error was detected. */
12083 xref_basetypes (tree ref
, tree base_list
)
12086 tree binfo
, base_binfo
;
12087 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12088 unsigned max_bases
= 0; /* Maximum direct bases. */
12090 tree default_access
;
12091 tree igo_prev
; /* Track Inheritance Graph Order. */
12093 if (ref
== error_mark_node
)
12096 /* The base of a derived class is private by default, all others are
12098 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12099 && CLASSTYPE_DECLARED_CLASS (ref
)
12100 ? access_private_node
: access_public_node
);
12102 /* First, make sure that any templates in base-classes are
12103 instantiated. This ensures that if we call ourselves recursively
12104 we do not get confused about which classes are marked and which
12106 basep
= &base_list
;
12109 tree basetype
= TREE_VALUE (*basep
);
12111 /* The dependent_type_p call below should really be dependent_scope_p
12112 so that we give a hard error about using an incomplete type as a
12113 base, but we allow it with a pedwarn for backward
12115 if (processing_template_decl
12116 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12117 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12118 if (!dependent_type_p (basetype
)
12119 && !complete_type_or_else (basetype
, NULL
))
12120 /* An incomplete type. Remove it from the list. */
12121 *basep
= TREE_CHAIN (*basep
);
12125 if (TREE_TYPE (*basep
))
12127 if (CLASS_TYPE_P (basetype
))
12128 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12129 basep
= &TREE_CHAIN (*basep
);
12133 TYPE_MARKED_P (ref
) = 1;
12135 /* The binfo slot should be empty, unless this is an (ill-formed)
12137 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12139 error ("redefinition of %q#T", ref
);
12143 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12145 binfo
= make_tree_binfo (max_bases
);
12147 TYPE_BINFO (ref
) = binfo
;
12148 BINFO_OFFSET (binfo
) = size_zero_node
;
12149 BINFO_TYPE (binfo
) = ref
;
12151 /* Apply base-class info set up to the variants of this type. */
12152 fixup_type_variants (ref
);
12156 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12157 /* An aggregate cannot have baseclasses. */
12158 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12160 if (TREE_CODE (ref
) == UNION_TYPE
)
12162 error ("derived union %qT invalid", ref
);
12169 if (TYPE_FOR_JAVA (ref
))
12171 error ("Java class %qT cannot have multiple bases", ref
);
12178 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12180 if (TYPE_FOR_JAVA (ref
))
12182 error ("Java class %qT cannot have virtual bases", ref
);
12187 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12189 tree access
= TREE_PURPOSE (base_list
);
12190 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12191 tree basetype
= TREE_VALUE (base_list
);
12193 if (access
== access_default_node
)
12194 access
= default_access
;
12196 if (PACK_EXPANSION_P (basetype
))
12197 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12198 if (TREE_CODE (basetype
) == TYPE_DECL
)
12199 basetype
= TREE_TYPE (basetype
);
12200 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12202 error ("base type %qT fails to be a struct or class type",
12207 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12208 TYPE_FOR_JAVA (ref
) = 1;
12210 base_binfo
= NULL_TREE
;
12211 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12213 base_binfo
= TYPE_BINFO (basetype
);
12214 /* The original basetype could have been a typedef'd type. */
12215 basetype
= BINFO_TYPE (base_binfo
);
12217 /* Inherit flags from the base. */
12218 TYPE_HAS_NEW_OPERATOR (ref
)
12219 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12220 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12221 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12222 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12223 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12224 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12225 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12226 CLASSTYPE_REPEATED_BASE_P (ref
)
12227 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12230 /* We must do this test after we've seen through a typedef
12232 if (TYPE_MARKED_P (basetype
))
12234 if (basetype
== ref
)
12235 error ("recursive type %qT undefined", basetype
);
12237 error ("duplicate base type %qT invalid", basetype
);
12241 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12242 /* Regenerate the pack expansion for the bases. */
12243 basetype
= make_pack_expansion (basetype
);
12245 TYPE_MARKED_P (basetype
) = 1;
12247 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12248 &igo_prev
, via_virtual
);
12249 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12250 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12252 BINFO_BASE_APPEND (binfo
, base_binfo
);
12253 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12256 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12257 /* If we didn't get max_vbases vbases, we must have shared at
12258 least one of them, and are therefore diamond shaped. */
12259 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12261 /* Unmark all the types. */
12262 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12263 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12264 TYPE_MARKED_P (ref
) = 0;
12266 /* Now see if we have a repeated base type. */
12267 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12269 for (base_binfo
= binfo
; base_binfo
;
12270 base_binfo
= TREE_CHAIN (base_binfo
))
12272 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12274 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12277 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12279 for (base_binfo
= binfo
; base_binfo
;
12280 base_binfo
= TREE_CHAIN (base_binfo
))
12281 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12282 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12291 /* Copies the enum-related properties from type SRC to type DST.
12292 Used with the underlying type of an enum and the enum itself. */
12294 copy_type_enum (tree dst
, tree src
)
12297 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12299 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12300 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12301 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12302 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12303 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12304 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12305 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12306 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12307 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12311 /* Begin compiling the definition of an enumeration type.
12314 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12316 UNDERLYING_TYPE is the type that will be used as the storage for
12317 the enumeration type. This should be NULL_TREE if no storage type
12320 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12322 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12324 Returns the type object, as yet incomplete.
12325 Also records info about it so that build_enumerator
12326 may be used to declare the individual values as they are read. */
12329 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12330 bool scoped_enum_p
, bool *is_new
)
12332 tree prevtype
= NULL_TREE
;
12333 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12337 /* [C++0x dcl.enum]p5:
12339 If not explicitly specified, the underlying type of a scoped
12340 enumeration type is int. */
12341 if (!underlying_type
&& scoped_enum_p
)
12342 underlying_type
= integer_type_node
;
12344 if (underlying_type
)
12345 underlying_type
= cv_unqualified (underlying_type
);
12347 /* If this is the real definition for a previous forward reference,
12348 fill in the contents in the same object that used to be the
12349 forward reference. */
12351 enumtype
= lookup_and_check_tag (enum_type
, name
,
12352 /*tag_scope=*/ts_current
,
12353 /*template_header_p=*/false);
12355 /* In case of a template_decl, the only check that should be deferred
12356 to instantiation time is the comparison of underlying types. */
12357 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12359 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12361 error_at (input_location
, "scoped/unscoped mismatch "
12362 "in enum %q#T", enumtype
);
12363 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12364 "previous definition here");
12365 enumtype
= error_mark_node
;
12367 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12369 error_at (input_location
, "underlying type mismatch "
12370 "in enum %q#T", enumtype
);
12371 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12372 "previous definition here");
12373 enumtype
= error_mark_node
;
12375 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12376 && !dependent_type_p (underlying_type
)
12377 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12378 && !same_type_p (underlying_type
,
12379 ENUM_UNDERLYING_TYPE (enumtype
)))
12381 error_at (input_location
, "different underlying type "
12382 "in enum %q#T", enumtype
);
12383 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12384 "previous definition here");
12385 underlying_type
= NULL_TREE
;
12389 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12390 || processing_template_decl
)
12392 /* In case of error, make a dummy enum to allow parsing to
12394 if (enumtype
== error_mark_node
)
12396 name
= make_anon_name ();
12397 enumtype
= NULL_TREE
;
12400 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12401 of an opaque enum, or an opaque enum of an already defined
12402 enumeration (C++0x only).
12403 In any other case, it'll be NULL_TREE. */
12409 prevtype
= enumtype
;
12411 /* Do not push the decl more than once, unless we need to
12412 compare underlying types at instantiation time */
12414 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12415 || (underlying_type
12416 && dependent_type_p (underlying_type
))
12417 || (ENUM_UNDERLYING_TYPE (enumtype
)
12418 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12420 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12421 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12424 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12427 if (enumtype
== error_mark_node
)
12428 return error_mark_node
;
12430 /* The enum is considered opaque until the opening '{' of the
12431 enumerator list. */
12432 SET_OPAQUE_ENUM_P (enumtype
, true);
12433 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12436 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12438 if (underlying_type
)
12440 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12442 copy_type_enum (enumtype
, underlying_type
);
12443 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12445 else if (dependent_type_p (underlying_type
))
12446 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12448 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12449 underlying_type
, enumtype
);
12452 /* If into a template class, the returned enum is always the first
12453 declaration (opaque or not) seen. This way all the references to
12454 this type will be to the same declaration. The following ones are used
12455 only to check for definition errors. */
12456 if (prevtype
&& processing_template_decl
)
12462 /* After processing and defining all the values of an enumeration type,
12463 install their decls in the enumeration type.
12464 ENUMTYPE is the type object. */
12467 finish_enum_value_list (tree enumtype
)
12470 tree underlying_type
;
12473 tree minnode
, maxnode
;
12476 bool fixed_underlying_type_p
12477 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12479 /* We built up the VALUES in reverse order. */
12480 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12482 /* For an enum defined in a template, just set the type of the values;
12483 all further processing is postponed until the template is
12484 instantiated. We need to set the type so that tsubst of a CONST_DECL
12486 if (processing_template_decl
)
12488 for (values
= TYPE_VALUES (enumtype
);
12490 values
= TREE_CHAIN (values
))
12491 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12495 /* Determine the minimum and maximum values of the enumerators. */
12496 if (TYPE_VALUES (enumtype
))
12498 minnode
= maxnode
= NULL_TREE
;
12500 for (values
= TYPE_VALUES (enumtype
);
12502 values
= TREE_CHAIN (values
))
12504 decl
= TREE_VALUE (values
);
12506 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12507 each enumerator has the type of its enumeration. Prior to the
12508 closing brace, the type of each enumerator is the type of its
12509 initializing value. */
12510 TREE_TYPE (decl
) = enumtype
;
12512 /* Update the minimum and maximum values, if appropriate. */
12513 value
= DECL_INITIAL (decl
);
12514 if (value
== error_mark_node
)
12515 value
= integer_zero_node
;
12516 /* Figure out what the minimum and maximum values of the
12517 enumerators are. */
12519 minnode
= maxnode
= value
;
12520 else if (tree_int_cst_lt (maxnode
, value
))
12522 else if (tree_int_cst_lt (value
, minnode
))
12529 If the enumerator-list is empty, the underlying type is as if
12530 the enumeration had a single enumerator with value 0. */
12531 minnode
= maxnode
= integer_zero_node
;
12533 if (!fixed_underlying_type_p
)
12535 /* Compute the number of bits require to represent all values of the
12536 enumeration. We must do this before the type of MINNODE and
12537 MAXNODE are transformed, since tree_int_cst_min_precision relies
12538 on the TREE_TYPE of the value it is passed. */
12539 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12540 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12541 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12542 int precision
= MAX (lowprec
, highprec
);
12544 bool use_short_enum
;
12546 /* Determine the underlying type of the enumeration.
12550 The underlying type of an enumeration is an integral type that
12551 can represent all the enumerator values defined in the
12552 enumeration. It is implementation-defined which integral type is
12553 used as the underlying type for an enumeration except that the
12554 underlying type shall not be larger than int unless the value of
12555 an enumerator cannot fit in an int or unsigned int.
12557 We use "int" or an "unsigned int" as the underlying type, even if
12558 a smaller integral type would work, unless the user has
12559 explicitly requested that we use the smallest possible type. The
12560 user can request that for all enumerations with a command line
12561 flag, or for just one enumeration with an attribute. */
12563 use_short_enum
= flag_short_enums
12564 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12566 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12570 underlying_type
= integer_types
[itk
];
12571 if (underlying_type
!= NULL_TREE
12572 && TYPE_PRECISION (underlying_type
) >= precision
12573 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12576 if (itk
== itk_none
)
12580 IF no integral type can represent all the enumerator values, the
12581 enumeration is ill-formed. */
12582 error ("no integral type can represent all of the enumerator values "
12583 "for %qT", enumtype
);
12584 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12585 underlying_type
= integer_types
[itk_unsigned_long_long
];
12590 The value of sizeof() applied to an enumeration type, an object
12591 of an enumeration type, or an enumerator, is the value of sizeof()
12592 applied to the underlying type. */
12593 copy_type_enum (enumtype
, underlying_type
);
12595 /* Compute the minimum and maximum values for the type.
12599 For an enumeration where emin is the smallest enumerator and emax
12600 is the largest, the values of the enumeration are the values of the
12601 underlying type in the range bmin to bmax, where bmin and bmax are,
12602 respectively, the smallest and largest values of the smallest bit-
12603 field that can store emin and emax. */
12605 /* The middle-end currently assumes that types with TYPE_PRECISION
12606 narrower than their underlying type are suitably zero or sign
12607 extended to fill their mode. Similarly, it assumes that the front
12608 end assures that a value of a particular type must be within
12609 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12611 We used to set these fields based on bmin and bmax, but that led
12612 to invalid assumptions like optimizing away bounds checking. So
12613 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12614 TYPE_MAX_VALUE to the values for the mode above and only restrict
12615 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12616 ENUM_UNDERLYING_TYPE (enumtype
)
12617 = build_distinct_type_copy (underlying_type
);
12618 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12619 set_min_and_max_values_for_integral_type
12620 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12622 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12623 if (flag_strict_enums
)
12624 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12628 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12630 /* Convert each of the enumerators to the type of the underlying
12631 type of the enumeration. */
12632 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12634 location_t saved_location
;
12636 decl
= TREE_VALUE (values
);
12637 saved_location
= input_location
;
12638 input_location
= DECL_SOURCE_LOCATION (decl
);
12639 if (fixed_underlying_type_p
)
12640 /* If the enumeration type has a fixed underlying type, we
12641 already checked all of the enumerator values. */
12642 value
= DECL_INITIAL (decl
);
12644 value
= perform_implicit_conversion (underlying_type
,
12645 DECL_INITIAL (decl
),
12646 tf_warning_or_error
);
12647 input_location
= saved_location
;
12649 /* Do not clobber shared ints. */
12650 value
= copy_node (value
);
12652 TREE_TYPE (value
) = enumtype
;
12653 DECL_INITIAL (decl
) = value
;
12656 /* Fix up all variant types of this enum type. */
12657 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12658 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12660 if (at_class_scope_p ()
12661 && COMPLETE_TYPE_P (current_class_type
)
12662 && UNSCOPED_ENUM_P (enumtype
))
12663 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12664 current_class_type
);
12666 /* Finish debugging output for this type. */
12667 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12670 /* Finishes the enum type. This is called only the first time an
12671 enumeration is seen, be it opaque or odinary.
12672 ENUMTYPE is the type object. */
12675 finish_enum (tree enumtype
)
12677 if (processing_template_decl
)
12679 if (at_function_scope_p ())
12680 add_stmt (build_min (TAG_DEFN
, enumtype
));
12684 /* If this is a forward declaration, there should not be any variants,
12685 though we can get a variant in the middle of an enum-specifier with
12686 wacky code like 'enum E { e = sizeof(const E*) };' */
12687 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12688 && (TYPE_VALUES (enumtype
)
12689 || !TYPE_NEXT_VARIANT (enumtype
)));
12692 /* Build and install a CONST_DECL for an enumeration constant of the
12693 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12694 LOC is the location of NAME.
12695 Assignment of sequential values by default is handled here. */
12698 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12704 /* If the VALUE was erroneous, pretend it wasn't there; that will
12705 result in the enum being assigned the next value in sequence. */
12706 if (value
== error_mark_node
)
12709 /* Remove no-op casts from the value. */
12711 STRIP_TYPE_NOPS (value
);
12713 if (! processing_template_decl
)
12715 /* Validate and default VALUE. */
12716 if (value
!= NULL_TREE
)
12718 value
= cxx_constant_value (value
);
12720 if (TREE_CODE (value
) != INTEGER_CST
12721 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12723 error ("enumerator value for %qD is not an integer constant",
12729 /* Default based on previous value. */
12730 if (value
== NULL_TREE
)
12732 if (TYPE_VALUES (enumtype
))
12737 /* C++03 7.2/4: If no initializer is specified for the first
12738 enumerator, the type is an unspecified integral
12739 type. Otherwise the type is the same as the type of the
12740 initializing value of the preceding enumerator unless the
12741 incremented value is not representable in that type, in
12742 which case the type is an unspecified integral type
12743 sufficient to contain the incremented value. */
12744 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12745 if (error_operand_p (prev_value
))
12746 value
= error_mark_node
;
12749 double_int di
= TREE_INT_CST (prev_value
)
12750 .add_with_sign (double_int_one
,
12751 false, &overflowed
);
12754 tree type
= TREE_TYPE (prev_value
);
12755 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12756 if (!double_int_fits_to_tree_p (type
, di
))
12759 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12761 type
= integer_types
[itk
];
12762 if (type
!= NULL_TREE
12763 && (pos
|| !TYPE_UNSIGNED (type
))
12764 && double_int_fits_to_tree_p (type
, di
))
12767 if (type
&& cxx_dialect
< cxx0x
12768 && itk
> itk_unsigned_long
)
12769 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12770 incremented enumerator value is too large for %<unsigned long%>" : "\
12771 incremented enumerator value is too large for %<long%>");
12773 if (type
== NULL_TREE
)
12776 value
= double_int_to_tree (type
, di
);
12781 error ("overflow in enumeration values at %qD", name
);
12782 value
= error_mark_node
;
12787 value
= integer_zero_node
;
12790 /* Remove no-op casts from the value. */
12791 STRIP_TYPE_NOPS (value
);
12793 /* If the underlying type of the enum is fixed, check whether
12794 the enumerator values fits in the underlying type. If it
12795 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12796 if (ENUM_UNDERLYING_TYPE (enumtype
)
12798 && TREE_CODE (value
) == INTEGER_CST
)
12800 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12801 error ("enumerator value %E is too large for underlying type %<%T%>",
12802 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12804 /* Convert the value to the appropriate type. */
12805 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12809 /* C++ associates enums with global, function, or class declarations. */
12810 context
= current_scope ();
12812 /* Build the actual enumeration constant. Note that the enumeration
12813 constants have the underlying type of the enum (if it is fixed)
12814 or the type of their initializer (if the underlying type of the
12815 enum is not fixed):
12819 If the underlying type is fixed, the type of each enumerator
12820 prior to the closing brace is the underlying type; if the
12821 initializing value of an enumerator cannot be represented by
12822 the underlying type, the program is ill-formed. If the
12823 underlying type is not fixed, the type of each enumerator is
12824 the type of its initializing value.
12826 If the underlying type is not fixed, it will be computed by
12827 finish_enum and we will reset the type of this enumerator. Of
12828 course, if we're processing a template, there may be no value. */
12829 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12831 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12833 DECL_CONTEXT (decl
) = enumtype
;
12834 TREE_CONSTANT (decl
) = 1;
12835 TREE_READONLY (decl
) = 1;
12836 DECL_INITIAL (decl
) = value
;
12838 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12839 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12840 on the TYPE_FIELDS list for `S'. (That's so that you can say
12841 things like `S::i' later.) */
12842 finish_member_declaration (decl
);
12846 /* Add this enumeration constant to the list for this type. */
12847 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12850 /* Look for an enumerator with the given NAME within the enumeration
12851 type ENUMTYPE. This routine is used primarily for qualified name
12852 lookup into an enumerator in C++0x, e.g.,
12854 enum class Color { Red, Green, Blue };
12856 Color color = Color::Red;
12858 Returns the value corresponding to the enumerator, or
12859 NULL_TREE if no such enumerator was found. */
12861 lookup_enumerator (tree enumtype
, tree name
)
12864 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12866 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12867 return e
? TREE_VALUE (e
) : NULL_TREE
;
12871 /* We're defining DECL. Make sure that its type is OK. */
12874 check_function_type (tree decl
, tree current_function_parms
)
12876 tree fntype
= TREE_TYPE (decl
);
12877 tree return_type
= complete_type (TREE_TYPE (fntype
));
12879 /* In a function definition, arg types must be complete. */
12880 require_complete_types_for_parms (current_function_parms
);
12882 if (dependent_type_p (return_type
)
12883 || type_uses_auto (return_type
))
12885 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12886 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12888 tree args
= TYPE_ARG_TYPES (fntype
);
12890 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12891 error ("return type %q#T is incomplete", return_type
);
12893 error ("return type has Java class type %q#T", return_type
);
12895 /* Make it return void instead. */
12896 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12897 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12899 TREE_CHAIN (args
));
12901 fntype
= build_function_type (void_type_node
, args
);
12903 = build_exception_variant (fntype
,
12904 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12905 fntype
= (cp_build_type_attribute_variant
12906 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12907 TREE_TYPE (decl
) = fntype
;
12910 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12913 /* Create the FUNCTION_DECL for a function definition.
12914 DECLSPECS and DECLARATOR are the parts of the declaration;
12915 they describe the function's name and the type it returns,
12916 but twisted together in a fashion that parallels the syntax of C.
12918 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12919 DECLARATOR is really the DECL for the function we are about to
12920 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12921 indicating that the function is an inline defined in-class.
12923 This function creates a binding context for the function body
12924 as well as setting up the FUNCTION_DECL in current_function_decl.
12926 For C++, we must first check whether that datum makes any sense.
12927 For example, "class A local_a(1,2);" means that variable local_a
12928 is an aggregate of type A, which should have a constructor
12929 applied to it with the argument list [1, 2].
12931 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12932 or may be a BLOCK if the function has been defined previously
12933 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12934 error_mark_node if the function has never been defined, or
12935 a BLOCK if the function has been defined somewhere. */
12938 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12940 tree ctype
= NULL_TREE
;
12943 int doing_friend
= 0;
12944 cp_binding_level
*bl
;
12945 tree current_function_parms
;
12946 struct c_fileinfo
*finfo
12947 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12948 bool honor_interface
;
12950 /* Sanity check. */
12951 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12952 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12954 fntype
= TREE_TYPE (decl1
);
12955 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12956 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12958 /* ISO C++ 11.4/5. A friend function defined in a class is in
12959 the (lexical) scope of the class in which it is defined. */
12960 if (!ctype
&& DECL_FRIEND_P (decl1
))
12962 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12964 /* CTYPE could be null here if we're dealing with a template;
12965 for example, `inline friend float foo()' inside a template
12966 will have no CTYPE set. */
12967 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12973 if (DECL_DECLARED_INLINE_P (decl1
)
12974 && lookup_attribute ("noinline", attrs
))
12975 warning (0, "inline function %q+D given attribute noinline", decl1
);
12977 /* Handle gnu_inline attribute. */
12978 if (GNU_INLINE_P (decl1
))
12980 DECL_EXTERNAL (decl1
) = 1;
12981 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12982 DECL_INTERFACE_KNOWN (decl1
) = 1;
12983 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12986 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12987 /* This is a constructor, we must ensure that any default args
12988 introduced by this definition are propagated to the clones
12989 now. The clones are used directly in overload resolution. */
12990 adjust_clone_args (decl1
);
12992 /* Sometimes we don't notice that a function is a static member, and
12993 build a METHOD_TYPE for it. Fix that up now. */
12994 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12995 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12997 /* Set up current_class_type, and enter the scope of the class, if
13000 push_nested_class (ctype
);
13001 else if (DECL_STATIC_FUNCTION_P (decl1
))
13002 push_nested_class (DECL_CONTEXT (decl1
));
13004 /* Now that we have entered the scope of the class, we must restore
13005 the bindings for any template parameters surrounding DECL1, if it
13006 is an inline member template. (Order is important; consider the
13007 case where a template parameter has the same name as a field of
13008 the class.) It is not until after this point that
13009 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13010 if (flags
& SF_INCLASS_INLINE
)
13011 maybe_begin_member_template_processing (decl1
);
13013 /* Effective C++ rule 15. */
13015 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13016 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
13017 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13019 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13020 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13021 if (!DECL_INITIAL (decl1
))
13022 DECL_INITIAL (decl1
) = error_mark_node
;
13024 /* This function exists in static storage.
13025 (This does not mean `static' in the C sense!) */
13026 TREE_STATIC (decl1
) = 1;
13028 /* We must call push_template_decl after current_class_type is set
13029 up. (If we are processing inline definitions after exiting a
13030 class scope, current_class_type will be NULL_TREE until set above
13031 by push_nested_class.) */
13032 if (processing_template_decl
)
13034 /* FIXME: Handle error_mark_node more gracefully. */
13035 tree newdecl1
= push_template_decl (decl1
);
13036 if (newdecl1
!= error_mark_node
)
13040 /* We are now in the scope of the function being defined. */
13041 current_function_decl
= decl1
;
13043 /* Save the parm names or decls from this function's declarator
13044 where store_parm_decls will find them. */
13045 current_function_parms
= DECL_ARGUMENTS (decl1
);
13047 /* Make sure the parameter and return types are reasonable. When
13048 you declare a function, these types can be incomplete, but they
13049 must be complete when you define the function. */
13050 check_function_type (decl1
, current_function_parms
);
13052 /* Build the return declaration for the function. */
13053 restype
= TREE_TYPE (fntype
);
13055 if (DECL_RESULT (decl1
) == NULL_TREE
)
13059 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13060 DECL_ARTIFICIAL (resdecl
) = 1;
13061 DECL_IGNORED_P (resdecl
) = 1;
13062 DECL_RESULT (decl1
) = resdecl
;
13064 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13067 /* Let the user know we're compiling this function. */
13068 announce_function (decl1
);
13070 /* Record the decl so that the function name is defined.
13071 If we already have a decl for this name, and it is a FUNCTION_DECL,
13072 use the old decl. */
13073 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13075 /* A specialization is not used to guide overload resolution. */
13076 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13077 && !(DECL_USE_TEMPLATE (decl1
) &&
13078 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13080 tree olddecl
= pushdecl (decl1
);
13082 if (olddecl
== error_mark_node
)
13083 /* If something went wrong when registering the declaration,
13084 use DECL1; we have to have a FUNCTION_DECL to use when
13085 parsing the body of the function. */
13089 /* Otherwise, OLDDECL is either a previous declaration
13090 of the same function or DECL1 itself. */
13092 if (warn_missing_declarations
13093 && olddecl
== decl1
13094 && !DECL_MAIN_P (decl1
)
13095 && TREE_PUBLIC (decl1
)
13096 && !DECL_DECLARED_INLINE_P (decl1
))
13100 /* Check whether DECL1 is in an anonymous
13102 for (context
= DECL_CONTEXT (decl1
);
13104 context
= DECL_CONTEXT (context
))
13106 if (TREE_CODE (context
) == NAMESPACE_DECL
13107 && DECL_NAME (context
) == NULL_TREE
)
13111 if (context
== NULL
)
13112 warning (OPT_Wmissing_declarations
,
13113 "no previous declaration for %q+D", decl1
);
13121 /* We need to set the DECL_CONTEXT. */
13122 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13123 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13125 fntype
= TREE_TYPE (decl1
);
13126 restype
= TREE_TYPE (fntype
);
13128 /* If #pragma weak applies, mark the decl appropriately now.
13129 The pragma only applies to global functions. Because
13130 determining whether or not the #pragma applies involves
13131 computing the mangled name for the declaration, we cannot
13132 apply the pragma until after we have merged this declaration
13133 with any previous declarations; if the original declaration
13134 has a linkage specification, that specification applies to
13135 the definition as well, and may affect the mangled name. */
13136 if (DECL_FILE_SCOPE_P (decl1
))
13137 maybe_apply_pragma_weak (decl1
);
13140 /* Reset this in case the call to pushdecl changed it. */
13141 current_function_decl
= decl1
;
13143 gcc_assert (DECL_INITIAL (decl1
));
13145 /* This function may already have been parsed, in which case just
13146 return; our caller will skip over the body without parsing. */
13147 if (DECL_INITIAL (decl1
) != error_mark_node
)
13150 /* Initialize RTL machinery. We cannot do this until
13151 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13152 even when processing a template; this is how we get
13153 CFUN set up, and our per-function variables initialized.
13154 FIXME factor out the non-RTL stuff. */
13155 bl
= current_binding_level
;
13156 allocate_struct_function (decl1
, processing_template_decl
);
13158 /* Initialize the language data structures. Whenever we start
13159 a new function, we destroy temporaries in the usual way. */
13160 cfun
->language
= ggc_alloc_cleared_language_function ();
13161 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13162 current_binding_level
= bl
;
13164 if (!processing_template_decl
&& type_uses_auto (restype
))
13166 FNDECL_USED_AUTO (decl1
) = true;
13167 current_function_auto_return_pattern
= restype
;
13170 /* Start the statement-tree, start the tree now. */
13171 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13173 /* If we are (erroneously) defining a function that we have already
13174 defined before, wipe out what we knew before. */
13175 if (!DECL_PENDING_INLINE_P (decl1
))
13176 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13178 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13180 /* We know that this was set up by `grokclassfn'. We do not
13181 wait until `store_parm_decls', since evil parse errors may
13182 never get us to that point. Here we keep the consistency
13183 between `current_class_type' and `current_class_ptr'. */
13184 tree t
= DECL_ARGUMENTS (decl1
);
13186 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13187 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
13189 cp_function_chain
->x_current_class_ref
13190 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13191 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13192 cp_function_chain
->x_current_class_ptr
= t
;
13194 /* Constructors and destructors need to know whether they're "in
13195 charge" of initializing virtual base classes. */
13196 t
= DECL_CHAIN (t
);
13197 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13199 current_in_charge_parm
= t
;
13200 t
= DECL_CHAIN (t
);
13202 if (DECL_HAS_VTT_PARM_P (decl1
))
13204 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13205 current_vtt_parm
= t
;
13209 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13210 /* Implicitly-defined methods (like the
13211 destructor for a class in which no destructor
13212 is explicitly declared) must not be defined
13213 until their definition is needed. So, we
13214 ignore interface specifications for
13215 compiler-generated functions. */
13216 && !DECL_ARTIFICIAL (decl1
));
13218 if (processing_template_decl
)
13219 /* Don't mess with interface flags. */;
13220 else if (DECL_INTERFACE_KNOWN (decl1
))
13222 tree ctx
= decl_function_context (decl1
);
13224 if (DECL_NOT_REALLY_EXTERN (decl1
))
13225 DECL_EXTERNAL (decl1
) = 0;
13227 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13228 /* This is a function in a local class in an extern inline
13229 or template function. */
13230 comdat_linkage (decl1
);
13232 /* If this function belongs to an interface, it is public.
13233 If it belongs to someone else's interface, it is also external.
13234 This only affects inlines and template instantiations. */
13235 else if (!finfo
->interface_unknown
&& honor_interface
)
13237 if (DECL_DECLARED_INLINE_P (decl1
)
13238 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13240 DECL_EXTERNAL (decl1
)
13241 = (finfo
->interface_only
13242 || (DECL_DECLARED_INLINE_P (decl1
)
13243 && ! flag_implement_inlines
13244 && !DECL_VINDEX (decl1
)));
13246 /* For WIN32 we also want to put these in linkonce sections. */
13247 maybe_make_one_only (decl1
);
13250 DECL_EXTERNAL (decl1
) = 0;
13251 DECL_INTERFACE_KNOWN (decl1
) = 1;
13252 /* If this function is in an interface implemented in this file,
13253 make sure that the back end knows to emit this function
13255 if (!DECL_EXTERNAL (decl1
))
13256 mark_needed (decl1
);
13258 else if (finfo
->interface_unknown
&& finfo
->interface_only
13259 && honor_interface
)
13261 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13262 interface, we will have both finfo->interface_unknown and
13263 finfo->interface_only set. In that case, we don't want to
13264 use the normal heuristics because someone will supply a
13265 #pragma implementation elsewhere, and deducing it here would
13266 produce a conflict. */
13267 comdat_linkage (decl1
);
13268 DECL_EXTERNAL (decl1
) = 0;
13269 DECL_INTERFACE_KNOWN (decl1
) = 1;
13270 DECL_DEFER_OUTPUT (decl1
) = 1;
13274 /* This is a definition, not a reference.
13275 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13276 if (!GNU_INLINE_P (decl1
))
13277 DECL_EXTERNAL (decl1
) = 0;
13279 if ((DECL_DECLARED_INLINE_P (decl1
)
13280 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13281 && ! DECL_INTERFACE_KNOWN (decl1
))
13282 DECL_DEFER_OUTPUT (decl1
) = 1;
13284 DECL_INTERFACE_KNOWN (decl1
) = 1;
13287 /* Determine the ELF visibility attribute for the function. We must not
13288 do this before calling "pushdecl", as we must allow "duplicate_decls"
13289 to merge any attributes appropriately. We also need to wait until
13291 if (!DECL_CLONED_FUNCTION_P (decl1
))
13292 determine_visibility (decl1
);
13294 begin_scope (sk_function_parms
, decl1
);
13298 if (DECL_DESTRUCTOR_P (decl1
)
13299 || (DECL_CONSTRUCTOR_P (decl1
)
13300 && targetm
.cxx
.cdtor_returns_this ()))
13302 cdtor_label
= build_decl (input_location
,
13303 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13304 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13307 start_fname_decls ();
13309 store_parm_decls (current_function_parms
);
13313 /* Like start_preparsed_function, except that instead of a
13314 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13316 Returns 1 on success. If the DECLARATOR is not suitable for a function
13317 (it defines a datum instead), we return 0, which tells
13318 yyparse to report a parse error. */
13321 start_function (cp_decl_specifier_seq
*declspecs
,
13322 const cp_declarator
*declarator
,
13327 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13328 if (decl1
== error_mark_node
)
13330 /* If the declarator is not suitable for a function definition,
13331 cause a syntax error. */
13332 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13334 error ("invalid function declaration");
13338 if (DECL_MAIN_P (decl1
))
13339 /* main must return int. grokfndecl should have corrected it
13340 (and issued a diagnostic) if the user got it wrong. */
13341 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13342 integer_type_node
));
13344 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13349 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13353 use_eh_spec_block (tree fn
)
13355 return (flag_exceptions
&& flag_enforce_eh_specs
13356 && !processing_template_decl
13357 && !type_throw_all_p (TREE_TYPE (fn
))
13358 /* We insert the EH_SPEC_BLOCK only in the original
13359 function; then, it is copied automatically to the
13361 && !DECL_CLONED_FUNCTION_P (fn
)
13362 /* Implicitly-generated constructors and destructors have
13363 exception specifications. However, those specifications
13364 are the union of the possible exceptions specified by the
13365 constructors/destructors for bases and members, so no
13366 unallowed exception will ever reach this function. By
13367 not creating the EH_SPEC_BLOCK we save a little memory,
13368 and we avoid spurious warnings about unreachable
13370 && !DECL_DEFAULTED_FN (fn
));
13373 /* Store the parameter declarations into the current function declaration.
13374 This is called after parsing the parameter declarations, before
13375 digesting the body of the function.
13377 Also install to binding contour return value identifier, if any. */
13380 store_parm_decls (tree current_function_parms
)
13382 tree fndecl
= current_function_decl
;
13385 /* This is a chain of any other decls that came in among the parm
13386 declarations. If a parm is declared with enum {foo, bar} x;
13387 then CONST_DECLs for foo and bar are put here. */
13388 tree nonparms
= NULL_TREE
;
13390 if (current_function_parms
)
13392 /* This case is when the function was defined with an ANSI prototype.
13393 The parms already have decls, so we need not do anything here
13394 except record them as in effect
13395 and complain if any redundant old-style parm decls were written. */
13397 tree specparms
= current_function_parms
;
13400 /* Must clear this because it might contain TYPE_DECLs declared
13402 current_binding_level
->names
= NULL
;
13404 /* If we're doing semantic analysis, then we'll call pushdecl
13405 for each of these. We must do them in reverse order so that
13406 they end in the correct forward order. */
13407 specparms
= nreverse (specparms
);
13409 for (parm
= specparms
; parm
; parm
= next
)
13411 next
= DECL_CHAIN (parm
);
13412 if (TREE_CODE (parm
) == PARM_DECL
)
13414 if (DECL_NAME (parm
) == NULL_TREE
13415 || TREE_CODE (parm
) != VOID_TYPE
)
13418 error ("parameter %qD declared void", parm
);
13422 /* If we find an enum constant or a type tag,
13423 put it aside for the moment. */
13424 TREE_CHAIN (parm
) = NULL_TREE
;
13425 nonparms
= chainon (nonparms
, parm
);
13429 /* Get the decls in their original chain order and record in the
13430 function. This is all and only the PARM_DECLs that were
13431 pushed into scope by the loop above. */
13432 DECL_ARGUMENTS (fndecl
) = getdecls ();
13435 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13437 /* Now store the final chain of decls for the arguments
13438 as the decl-chain of the current lexical scope.
13439 Put the enumerators in as well, at the front so that
13440 DECL_ARGUMENTS is not modified. */
13441 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13443 if (use_eh_spec_block (current_function_decl
))
13444 current_eh_spec_block
= begin_eh_spec_block ();
13448 /* We have finished doing semantic analysis on DECL, but have not yet
13449 generated RTL for its body. Save away our current state, so that
13450 when we want to generate RTL later we know what to do. */
13453 save_function_data (tree decl
)
13455 struct language_function
*f
;
13457 /* Save the language-specific per-function data so that we can
13458 get it back when we really expand this function. */
13459 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13462 f
= ggc_alloc_language_function ();
13463 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13464 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13466 /* Clear out the bits we don't need. */
13467 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13468 f
->bindings
= NULL
;
13469 f
->x_local_names
= NULL
;
13470 f
->base
.local_typedefs
= NULL
;
13474 /* Set the return value of the constructor (if present). */
13477 finish_constructor_body (void)
13482 if (targetm
.cxx
.cdtor_returns_this ()
13483 && (! TYPE_FOR_JAVA (current_class_type
)))
13485 /* Any return from a constructor will end up here. */
13486 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13488 val
= DECL_ARGUMENTS (current_function_decl
);
13489 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13490 DECL_RESULT (current_function_decl
), val
);
13491 /* Return the address of the object. */
13492 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13493 add_stmt (exprstmt
);
13497 /* Do all the processing for the beginning of a destructor; set up the
13498 vtable pointers and cleanups for bases and members. */
13501 begin_destructor_body (void)
13503 tree compound_stmt
;
13505 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13506 issued an error message. We still want to try to process the
13507 body of the function, but initialize_vtbl_ptrs will crash if
13508 TYPE_BINFO is NULL. */
13509 if (COMPLETE_TYPE_P (current_class_type
))
13511 compound_stmt
= begin_compound_stmt (0);
13512 /* Make all virtual function table pointers in non-virtual base
13513 classes point to CURRENT_CLASS_TYPE's virtual function
13515 initialize_vtbl_ptrs (current_class_ptr
);
13516 finish_compound_stmt (compound_stmt
);
13518 /* And insert cleanups for our bases and members so that they
13519 will be properly destroyed if we throw. */
13520 push_base_cleanups ();
13524 /* At the end of every destructor we generate code to delete the object if
13525 necessary. Do that now. */
13528 finish_destructor_body (void)
13532 /* Any return from a destructor will end up here; that way all base
13533 and member cleanups will be run when the function returns. */
13534 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13536 /* In a virtual destructor, we must call delete. */
13537 if (DECL_VIRTUAL_P (current_function_decl
))
13540 tree virtual_size
= cxx_sizeof (current_class_type
);
13544 At the point of definition of a virtual destructor (including
13545 an implicit definition), non-placement operator delete shall
13546 be looked up in the scope of the destructor's class and if
13547 found shall be accessible and unambiguous. */
13548 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13550 /*global_p=*/false,
13551 /*placement=*/NULL_TREE
,
13552 /*alloc_fn=*/NULL_TREE
,
13553 tf_warning_or_error
);
13555 if_stmt
= begin_if_stmt ();
13556 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13557 current_in_charge_parm
,
13560 finish_expr_stmt (exprstmt
);
13561 finish_then_clause (if_stmt
);
13562 finish_if_stmt (if_stmt
);
13565 if (targetm
.cxx
.cdtor_returns_this ())
13569 val
= DECL_ARGUMENTS (current_function_decl
);
13570 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13571 DECL_RESULT (current_function_decl
), val
);
13572 /* Return the address of the object. */
13573 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13574 add_stmt (exprstmt
);
13578 /* Do the necessary processing for the beginning of a function body, which
13579 in this case includes member-initializers, but not the catch clauses of
13580 a function-try-block. Currently, this means opening a binding level
13581 for the member-initializers (in a ctor), member cleanups (in a dtor),
13582 and capture proxies (in a lambda operator()). */
13585 begin_function_body (void)
13589 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13592 if (processing_template_decl
)
13593 /* Do nothing now. */;
13595 /* Always keep the BLOCK node associated with the outermost pair of
13596 curly braces of a function. These are needed for correct
13597 operation of dwarfout.c. */
13598 keep_next_level (true);
13600 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13602 if (processing_template_decl
)
13603 /* Do nothing now. */;
13604 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13605 begin_destructor_body ();
13610 /* Do the processing for the end of a function body. Currently, this means
13611 closing out the cleanups for fully-constructed bases and members, and in
13612 the case of the destructor, deleting the object if desired. Again, this
13613 is only meaningful for [cd]tors, since they are the only functions where
13614 there is a significant distinction between the main body and any
13615 function catch clauses. Handling, say, main() return semantics here
13616 would be wrong, as flowing off the end of a function catch clause for
13617 main() would also need to return 0. */
13620 finish_function_body (tree compstmt
)
13622 if (compstmt
== NULL_TREE
)
13625 /* Close the block. */
13626 finish_compound_stmt (compstmt
);
13628 if (processing_template_decl
)
13629 /* Do nothing now. */;
13630 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13631 finish_constructor_body ();
13632 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13633 finish_destructor_body ();
13636 /* Given a function, returns the BLOCK corresponding to the outermost level
13637 of curly braces, skipping the artificial block created for constructor
13641 outer_curly_brace_block (tree fndecl
)
13643 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13644 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13645 /* Skip the artificial function body block. */
13646 block
= BLOCK_SUBBLOCKS (block
);
13650 /* If FNDECL is a class's key method, add the class to the list of
13651 keyed classes that should be emitted. */
13654 record_key_method_defined (tree fndecl
)
13656 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13657 && DECL_VIRTUAL_P (fndecl
)
13658 && !processing_template_decl
)
13660 tree fnclass
= DECL_CONTEXT (fndecl
);
13661 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13662 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13666 /* Subroutine of finish_function.
13667 Save the body of constexpr functions for possible
13668 future compile time evaluation. */
13671 maybe_save_function_definition (tree fun
)
13673 if (!processing_template_decl
13674 && DECL_DECLARED_CONSTEXPR_P (fun
)
13675 && !DECL_CLONED_FUNCTION_P (fun
))
13676 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13679 /* Finish up a function declaration and compile that function
13680 all the way to assembler language output. The free the storage
13681 for the function definition.
13683 FLAGS is a bitwise or of the following values:
13685 We just finished processing the body of an in-class inline
13686 function definition. (This processing will have taken place
13687 after the class definition is complete.) */
13690 finish_function (int flags
)
13692 tree fndecl
= current_function_decl
;
13693 tree fntype
, ctype
= NULL_TREE
;
13694 int inclass_inline
= (flags
& 2) != 0;
13696 /* When we get some parse errors, we can end up without a
13697 current_function_decl, so cope. */
13698 if (fndecl
== NULL_TREE
)
13699 return error_mark_node
;
13701 if (c_dialect_objc ())
13702 objc_finish_function ();
13704 gcc_assert (!defer_mark_used_calls
);
13705 defer_mark_used_calls
= true;
13707 record_key_method_defined (fndecl
);
13709 fntype
= TREE_TYPE (fndecl
);
13711 /* TREE_READONLY (fndecl) = 1;
13712 This caused &foo to be of type ptr-to-const-function
13713 which then got a warning when stored in a ptr-to-function variable. */
13715 gcc_assert (building_stmt_list_p ());
13716 /* The current function is being defined, so its DECL_INITIAL should
13717 be set, and unless there's a multiple definition, it should be
13718 error_mark_node. */
13719 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13721 /* For a cloned function, we've already got all the code we need;
13722 there's no need to add any extra bits. */
13723 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13725 /* Make it so that `main' always returns 0 by default. */
13726 if (DECL_MAIN_P (current_function_decl
))
13727 finish_return_stmt (integer_zero_node
);
13729 if (use_eh_spec_block (current_function_decl
))
13730 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13731 (TREE_TYPE (current_function_decl
)),
13732 current_eh_spec_block
);
13735 /* If we're saving up tree structure, tie off the function now. */
13736 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13738 finish_fname_decls ();
13740 /* If this function can't throw any exceptions, remember that. */
13741 if (!processing_template_decl
13742 && !cp_function_chain
->can_throw
13743 && !flag_non_call_exceptions
13744 && !decl_replaceable_p (fndecl
))
13745 TREE_NOTHROW (fndecl
) = 1;
13747 /* This must come after expand_function_end because cleanups might
13748 have declarations (from inline functions) that need to go into
13749 this function's blocks. */
13751 /* If the current binding level isn't the outermost binding level
13752 for this function, either there is a bug, or we have experienced
13753 syntax errors and the statement tree is malformed. */
13754 if (current_binding_level
->kind
!= sk_function_parms
)
13756 /* Make sure we have already experienced errors. */
13757 gcc_assert (errorcount
);
13759 /* Throw away the broken statement tree and extra binding
13761 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13763 while (current_binding_level
->kind
!= sk_function_parms
)
13765 if (current_binding_level
->kind
== sk_class
)
13766 pop_nested_class ();
13768 poplevel (0, 0, 0);
13771 poplevel (1, 0, 1);
13773 /* Statements should always be full-expressions at the outermost set
13774 of curly braces for a function. */
13775 gcc_assert (stmts_are_full_exprs_p ());
13777 /* If there are no return statements in a function with auto return type,
13778 the return type is void. But if the declared type is something like
13779 auto*, this is an error. */
13780 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13781 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13783 if (!is_auto (current_function_auto_return_pattern
)
13784 && !current_function_returns_value
&& !current_function_returns_null
)
13786 error ("no return statements in function returning %qT",
13787 current_function_auto_return_pattern
);
13788 inform (input_location
, "only plain %<auto%> return type can be "
13789 "deduced to %<void%>");
13791 apply_deduced_return_type (fndecl
, void_type_node
);
13792 fntype
= TREE_TYPE (fndecl
);
13795 /* Save constexpr function body before it gets munged by
13796 the NRV transformation. */
13797 maybe_save_function_definition (fndecl
);
13799 /* Set up the named return value optimization, if we can. Candidate
13800 variables are selected in check_return_expr. */
13801 if (current_function_return_value
)
13803 tree r
= current_function_return_value
;
13806 if (r
!= error_mark_node
13807 /* This is only worth doing for fns that return in memory--and
13808 simpler, since we don't have to worry about promoted modes. */
13809 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13810 /* Only allow this for variables declared in the outer scope of
13811 the function so we know that their lifetime always ends with a
13812 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13813 we were to do this optimization in tree-ssa. */
13814 && (outer
= outer_curly_brace_block (fndecl
))
13815 && chain_member (r
, BLOCK_VARS (outer
)))
13816 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13818 current_function_return_value
= NULL_TREE
;
13821 /* Remember that we were in class scope. */
13822 if (current_class_name
)
13823 ctype
= current_class_type
;
13825 /* Must mark the RESULT_DECL as being in this function. */
13826 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13828 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13829 to the FUNCTION_DECL node itself. */
13830 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13832 /* Save away current state, if appropriate. */
13833 if (!processing_template_decl
)
13834 save_function_data (fndecl
);
13836 /* Complain if there's just no return statement. */
13837 if (warn_return_type
13838 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13839 && !dependent_type_p (TREE_TYPE (fntype
))
13840 && !current_function_returns_value
&& !current_function_returns_null
13841 /* Don't complain if we abort or throw. */
13842 && !current_function_returns_abnormally
13843 /* Don't complain if we are declared noreturn. */
13844 && !TREE_THIS_VOLATILE (fndecl
)
13845 && !DECL_NAME (DECL_RESULT (fndecl
))
13846 && !TREE_NO_WARNING (fndecl
)
13847 /* Structor return values (if any) are set by the compiler. */
13848 && !DECL_CONSTRUCTOR_P (fndecl
)
13849 && !DECL_DESTRUCTOR_P (fndecl
)
13850 && targetm
.warn_func_return (fndecl
))
13852 warning (OPT_Wreturn_type
,
13853 "no return statement in function returning non-void");
13854 TREE_NO_WARNING (fndecl
) = 1;
13857 /* Store the end of the function, so that we get good line number
13858 info for the epilogue. */
13859 cfun
->function_end_locus
= input_location
;
13861 /* Complain about parameters that are only set, but never otherwise used. */
13862 if (warn_unused_but_set_parameter
13863 && !processing_template_decl
13864 && errorcount
== unused_but_set_errorcount
13865 && !DECL_CLONED_FUNCTION_P (fndecl
))
13869 for (decl
= DECL_ARGUMENTS (fndecl
);
13871 decl
= DECL_CHAIN (decl
))
13872 if (TREE_USED (decl
)
13873 && TREE_CODE (decl
) == PARM_DECL
13874 && !DECL_READ_P (decl
)
13875 && DECL_NAME (decl
)
13876 && !DECL_ARTIFICIAL (decl
)
13877 && !TREE_NO_WARNING (decl
)
13878 && !DECL_IN_SYSTEM_HEADER (decl
)
13879 && TREE_TYPE (decl
) != error_mark_node
13880 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13881 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13882 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13883 warning (OPT_Wunused_but_set_parameter
,
13884 "parameter %q+D set but not used", decl
);
13885 unused_but_set_errorcount
= errorcount
;
13888 /* Complain about locally defined typedefs that are not used in this
13890 maybe_warn_unused_local_typedefs ();
13892 /* Genericize before inlining. */
13893 if (!processing_template_decl
)
13895 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13896 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13897 cp_genericize (fndecl
);
13898 /* Clear out the bits we don't need. */
13899 f
->x_current_class_ptr
= NULL
;
13900 f
->x_current_class_ref
= NULL
;
13901 f
->x_eh_spec_block
= NULL
;
13902 f
->x_in_charge_parm
= NULL
;
13903 f
->x_vtt_parm
= NULL
;
13904 f
->x_return_value
= NULL
;
13905 f
->bindings
= NULL
;
13906 f
->extern_decl_map
= NULL
;
13908 /* Clear out the bits we don't need. */
13909 local_names
= NULL
;
13911 /* We're leaving the context of this function, so zap cfun. It's still in
13912 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13914 current_function_decl
= NULL
;
13916 /* If this is an in-class inline definition, we may have to pop the
13917 bindings for the template parameters that we added in
13918 maybe_begin_member_template_processing when start_function was
13920 if (inclass_inline
)
13921 maybe_end_member_template_processing ();
13923 /* Leave the scope of the class. */
13925 pop_nested_class ();
13930 current_function_decl
= NULL_TREE
;
13932 defer_mark_used_calls
= false;
13933 if (deferred_mark_used_calls
)
13938 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
13940 vec_free (deferred_mark_used_calls
);
13946 /* Create the FUNCTION_DECL for a function definition.
13947 DECLSPECS and DECLARATOR are the parts of the declaration;
13948 they describe the return type and the name of the function,
13949 but twisted together in a fashion that parallels the syntax of C.
13951 This function creates a binding context for the function body
13952 as well as setting up the FUNCTION_DECL in current_function_decl.
13954 Returns a FUNCTION_DECL on success.
13956 If the DECLARATOR is not suitable for a function (it defines a datum
13957 instead), we return 0, which tells yyparse to report a parse error.
13959 May return void_type_node indicating that this method is actually
13960 a friend. See grokfield for more details.
13962 Came here with a `.pushlevel' .
13964 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13965 CHANGES TO CODE IN `grokfield'. */
13968 grokmethod (cp_decl_specifier_seq
*declspecs
,
13969 const cp_declarator
*declarator
, tree attrlist
)
13971 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13974 if (fndecl
== error_mark_node
)
13975 return error_mark_node
;
13977 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13979 error ("invalid member function declaration");
13980 return error_mark_node
;
13984 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13986 /* Pass friends other than inline friend functions back. */
13987 if (fndecl
== void_type_node
)
13990 if (DECL_IN_AGGR_P (fndecl
))
13992 if (DECL_CLASS_SCOPE_P (fndecl
))
13993 error ("%qD is already defined in class %qT", fndecl
,
13994 DECL_CONTEXT (fndecl
));
13995 return error_mark_node
;
13998 check_template_shadow (fndecl
);
14000 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14001 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14003 /* We process method specializations in finish_struct_1. */
14004 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14006 fndecl
= push_template_decl (fndecl
);
14007 if (fndecl
== error_mark_node
)
14011 if (! DECL_FRIEND_P (fndecl
))
14013 if (DECL_CHAIN (fndecl
))
14015 fndecl
= copy_node (fndecl
);
14016 TREE_CHAIN (fndecl
) = NULL_TREE
;
14020 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14022 DECL_IN_AGGR_P (fndecl
) = 1;
14027 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14028 we can lay it out later, when and if its type becomes complete. */
14031 maybe_register_incomplete_var (tree var
)
14033 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
14035 /* Keep track of variables with incomplete types. */
14036 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14037 && DECL_EXTERNAL (var
))
14039 tree inner_type
= TREE_TYPE (var
);
14041 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14042 inner_type
= TREE_TYPE (inner_type
);
14043 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14045 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14046 /* RTTI TD entries are created while defining the type_info. */
14047 || (TYPE_LANG_SPECIFIC (inner_type
)
14048 && TYPE_BEING_DEFINED (inner_type
)))
14050 incomplete_var iv
= {var
, inner_type
};
14051 vec_safe_push (incomplete_vars
, iv
);
14056 /* Called when a class type (given by TYPE) is defined. If there are
14057 any existing VAR_DECLs whose type has been completed by this
14058 declaration, update them now. */
14061 complete_vars (tree type
)
14064 incomplete_var
*iv
;
14066 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14068 if (same_type_p (type
, iv
->incomplete_type
))
14070 tree var
= iv
->decl
;
14071 tree type
= TREE_TYPE (var
);
14072 /* Complete the type of the variable. The VAR_DECL itself
14073 will be laid out in expand_expr. */
14074 complete_type (type
);
14075 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14076 /* Remove this entry from the list. */
14077 incomplete_vars
->unordered_remove (ix
);
14083 /* Check for pending declarations which may have abstract type. */
14084 complete_type_check_abstract (type
);
14087 /* If DECL is of a type which needs a cleanup, build and return an
14088 expression to perform that cleanup here. Return NULL_TREE if no
14089 cleanup need be done. */
14092 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14098 /* Assume no cleanup is required. */
14099 cleanup
= NULL_TREE
;
14101 if (error_operand_p (decl
))
14104 /* Handle "__attribute__((cleanup))". We run the cleanup function
14105 before the destructor since the destructor is what actually
14106 terminates the lifetime of the object. */
14107 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14114 /* Get the name specified by the user for the cleanup function. */
14115 id
= TREE_VALUE (TREE_VALUE (attr
));
14116 /* Look up the name to find the cleanup function to call. It is
14117 important to use lookup_name here because that is what is
14118 used in c-common.c:handle_cleanup_attribute when performing
14119 initial checks on the attribute. Note that those checks
14120 include ensuring that the function found is not an overloaded
14121 function, or an object with an overloaded call operator,
14122 etc.; we can rely on the fact that the function found is an
14123 ordinary FUNCTION_DECL. */
14124 fn
= lookup_name (id
);
14125 arg
= build_address (decl
);
14127 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14128 if (cleanup
== error_mark_node
)
14129 return error_mark_node
;
14131 /* Handle ordinary C++ destructors. */
14132 type
= TREE_TYPE (decl
);
14133 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14135 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14136 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14137 && CLASSTYPE_VBASECLASSES (type
));
14141 if (TREE_CODE (type
) == ARRAY_TYPE
)
14144 addr
= build_address (decl
);
14146 /* Optimize for space over speed here. */
14147 if (!has_vbases
|| flag_expensive_optimizations
)
14148 flags
|= LOOKUP_NONVIRTUAL
;
14150 call
= build_delete (TREE_TYPE (addr
), addr
,
14151 sfk_complete_destructor
, flags
, 0, complain
);
14152 if (call
== error_mark_node
)
14153 cleanup
= error_mark_node
;
14155 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14160 /* build_delete sets the location of the destructor call to the
14161 current location, even though the destructor is going to be
14162 called later, at the end of the current scope. This can lead to
14163 a "jumpy" behaviour for users of debuggers when they step around
14164 the end of the block. So let's unset the location of the
14165 destructor call instead. */
14166 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14167 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14172 /* When a stmt has been parsed, this function is called. */
14179 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14180 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14181 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14184 static_fn_type (tree memfntype
)
14189 if (TYPE_PTRMEMFUNC_P (memfntype
))
14190 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14191 if (POINTER_TYPE_P (memfntype
)
14192 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14193 memfntype
= TREE_TYPE (memfntype
);
14194 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14196 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14197 args
= TYPE_ARG_TYPES (memfntype
);
14198 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14199 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
14200 fntype
= (cp_build_type_attribute_variant
14201 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14202 fntype
= (build_exception_variant
14203 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14207 /* DECL was originally constructed as a non-static member function,
14208 but turned out to be static. Update it accordingly. */
14211 revert_static_member_fn (tree decl
)
14213 tree stype
= static_fn_type (decl
);
14214 cp_cv_quals quals
= type_memfn_quals (stype
);
14216 if (quals
!= TYPE_UNQUALIFIED
)
14217 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
14219 TREE_TYPE (decl
) = stype
;
14221 if (DECL_ARGUMENTS (decl
))
14222 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14223 DECL_STATIC_FUNCTION_P (decl
) = 1;
14226 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14227 one of the language-independent trees. */
14229 enum cp_tree_node_structure_enum
14230 cp_tree_node_structure (union lang_tree_node
* t
)
14232 switch (TREE_CODE (&t
->generic
))
14234 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14235 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14236 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14237 case OVERLOAD
: return TS_CP_OVERLOAD
;
14238 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14239 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14240 case BASELINK
: return TS_CP_BASELINK
;
14241 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14242 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14243 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14244 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14245 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14246 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14247 default: return TS_CP_GENERIC
;
14251 /* Build the void_list_node (void_type_node having been created). */
14253 build_void_list_node (void)
14255 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14260 cp_missing_noreturn_ok_p (tree decl
)
14262 /* A missing noreturn is ok for the `main' function. */
14263 return DECL_MAIN_P (decl
);
14266 /* Return the COMDAT group into which DECL should be placed. */
14269 cxx_comdat_group (tree decl
)
14273 /* Virtual tables, construction virtual tables, and virtual table
14274 tables all go in a single COMDAT group, named after the primary
14276 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
14277 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14278 /* For all other DECLs, the COMDAT group is the mangled name of the
14279 declaration itself. */
14282 while (DECL_THUNK_P (decl
))
14284 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14285 into the same section as the target function. In that case
14286 we must return target's name. */
14287 tree target
= THUNK_TARGET (decl
);
14288 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14289 && DECL_SECTION_NAME (target
) != NULL
14290 && DECL_ONE_ONLY (target
))
14295 name
= DECL_ASSEMBLER_NAME (decl
);
14301 #include "gt-cp-decl.h"