1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
36 #include "double-int.h"
43 #include "tree-hasher.h"
44 #include "stringpool.h"
45 #include "stor-layout.h"
51 #include "tree-iterator.h"
52 #include "tree-inline.h"
59 #include "c-family/c-common.h"
60 #include "c-family/c-objc.h"
61 #include "c-family/c-pragma.h"
62 #include "c-family/c-target.h"
63 #include "c-family/c-ubsan.h"
64 #include "diagnostic.h"
68 #include "splay-tree.h"
72 #include "plugin-api.h"
73 #include "hard-reg-set.h"
82 /* Possible cases of bad specifiers type used by bad_specifiers. */
84 BSP_VAR
, /* variable */
85 BSP_PARM
, /* parameter */
90 static tree
grokparms (tree parmlist
, tree
*);
91 static const char *redeclaration_error_message (tree
, tree
);
93 static int decl_jump_unsafe (tree
);
94 static void require_complete_types_for_parms (tree
);
95 static int ambi_op_p (enum tree_code
);
96 static int unary_op_p (enum tree_code
);
97 static void push_local_name (tree
);
98 static tree
grok_reference_init (tree
, tree
, tree
, int);
99 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
100 int, int, int, tree
);
101 static int check_static_variable_definition (tree
, tree
);
102 static void record_unknown_type (tree
, const char *);
103 static tree
builtin_function_1 (tree
, tree
, bool);
104 static int member_function_or_else (tree
, tree
, enum overload_flags
);
105 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
107 static void check_for_uninitialized_const_var (tree
);
108 static tree
local_variable_p_walkfn (tree
*, int *, void *);
109 static tree
record_builtin_java_type (const char *, int);
110 static const char *tag_name (enum tag_types
);
111 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
112 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
113 static void maybe_deduce_size_from_array_init (tree
, tree
);
114 static void layout_var_decl (tree
);
115 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
116 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
117 static void save_function_data (tree
);
118 static void copy_type_enum (tree
, tree
);
119 static void check_function_type (tree
, tree
);
120 static void finish_constructor_body (void);
121 static void begin_destructor_body (void);
122 static void finish_destructor_body (void);
123 static void record_key_method_defined (tree
);
124 static tree
create_array_type_for_decl (tree
, tree
, tree
);
125 static tree
get_atexit_node (void);
126 static tree
get_dso_handle_node (void);
127 static tree
start_cleanup_fn (void);
128 static void end_cleanup_fn (void);
129 static tree
cp_make_fname_decl (location_t
, tree
, int);
130 static void initialize_predefined_identifiers (void);
131 static tree check_special_function_return_type
132 (special_function_kind
, tree
, tree
);
133 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
134 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
135 static void store_parm_decls (tree
);
136 static void initialize_local_var (tree
, tree
);
137 static void expand_static_init (tree
, tree
);
139 /* The following symbols are subsumed in the cp_global_trees array, and
140 listed here individually for documentation purposes.
143 tree wchar_decl_node;
145 tree vtable_entry_type;
146 tree delta_type_node;
147 tree __t_desc_type_node;
149 tree class_type_node;
150 tree unknown_type_node;
152 Array type `vtable_entry_type[]'
155 tree vtbl_ptr_type_node;
162 A FUNCTION_DECL which can call `abort'. Not necessarily the
163 one that the user will declare, but sufficient to be called
164 by routines that want to abort the program.
169 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
170 tree tinfo_var_id; */
172 tree cp_global_trees
[CPTI_MAX
];
174 /* Indicates that there is a type value in some namespace, although
175 that is not necessarily in scope at the moment. */
177 tree global_type_node
;
179 /* The node that holds the "name" of the global scope. */
180 tree global_scope_name
;
182 #define local_names cp_function_chain->x_local_names
184 /* A list of objects which have constructors or destructors
185 which reside in the global scope. The decl is stored in
186 the TREE_VALUE slot and the initializer is stored
187 in the TREE_PURPOSE slot. */
188 tree static_aggregates
;
190 /* Like static_aggregates, but for thread_local variables. */
195 /* A node for the integer constant 2. */
197 tree integer_two_node
;
199 /* Used only for jumps to as-yet undefined labels, since jumps to
200 defined labels can have their validity checked immediately. */
202 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
203 struct named_label_use_entry
*next
;
204 /* The binding level to which this entry is *currently* attached.
205 This is initially the binding level in which the goto appeared,
206 but is modified as scopes are closed. */
207 cp_binding_level
*binding_level
;
208 /* The head of the names list that was current when the goto appeared,
209 or the inner scope popped. These are the decls that will *not* be
210 skipped when jumping to the label. */
212 /* The location of the goto, for error reporting. */
213 location_t o_goto_locus
;
214 /* True if an OpenMP structured block scope has been closed since
215 the goto appeared. This means that the branch from the label will
216 illegally exit an OpenMP scope. */
220 /* A list of all LABEL_DECLs in the function that have names. Here so
221 we can clear out their names' definitions at the end of the
222 function, and so we can check the validity of jumps to these labels. */
224 struct GTY((for_user
)) named_label_entry
{
225 /* The decl itself. */
228 /* The binding level to which the label is *currently* attached.
229 This is initially set to the binding level in which the label
230 is defined, but is modified as scopes are closed. */
231 cp_binding_level
*binding_level
;
232 /* The head of the names list that was current when the label was
233 defined, or the inner scope popped. These are the decls that will
234 be skipped when jumping to the label. */
236 /* A vector of all decls from all binding levels that would be
237 crossed by a backward branch to the label. */
238 vec
<tree
, va_gc
> *bad_decls
;
240 /* A list of uses of the label, before the label is defined. */
241 struct named_label_use_entry
*uses
;
243 /* The following bits are set after the label is defined, and are
244 updated as scopes are popped. They indicate that a backward jump
245 to the label will illegally enter a scope of the given flavor. */
251 #define named_labels cp_function_chain->x_named_labels
253 /* The number of function bodies which we are currently processing.
254 (Zero if we are at namespace scope, one inside the body of a
255 function, two inside the body of a function in a local class, etc.) */
258 /* To avoid unwanted recursion, finish_function defers all mark_used calls
259 encountered during its execution until it finishes. */
260 bool defer_mark_used_calls
;
261 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
263 /* States indicating how grokdeclarator() should handle declspecs marked
264 with __attribute__((deprecated)). An object declared as
265 __attribute__((deprecated)) suppresses warnings of uses of other
267 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
270 /* A list of VAR_DECLs whose type was incomplete at the time the
271 variable was declared. */
273 typedef struct GTY(()) incomplete_var_d
{
275 tree incomplete_type
;
279 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
281 /* Returns the kind of template specialization we are currently
282 processing, given that it's declaration contained N_CLASS_SCOPES
283 explicit scope qualifications. */
286 current_tmpl_spec_kind (int n_class_scopes
)
288 int n_template_parm_scopes
= 0;
289 int seen_specialization_p
= 0;
290 int innermost_specialization_p
= 0;
293 /* Scan through the template parameter scopes. */
294 for (b
= current_binding_level
;
295 b
->kind
== sk_template_parms
;
298 /* If we see a specialization scope inside a parameter scope,
299 then something is wrong. That corresponds to a declaration
302 template <class T> template <> ...
304 which is always invalid since [temp.expl.spec] forbids the
305 specialization of a class member template if the enclosing
306 class templates are not explicitly specialized as well. */
307 if (b
->explicit_spec_p
)
309 if (n_template_parm_scopes
== 0)
310 innermost_specialization_p
= 1;
312 seen_specialization_p
= 1;
314 else if (seen_specialization_p
== 1)
315 return tsk_invalid_member_spec
;
317 ++n_template_parm_scopes
;
320 /* Handle explicit instantiations. */
321 if (processing_explicit_instantiation
)
323 if (n_template_parm_scopes
!= 0)
324 /* We've seen a template parameter list during an explicit
325 instantiation. For example:
327 template <class T> template void f(int);
329 This is erroneous. */
330 return tsk_invalid_expl_inst
;
332 return tsk_expl_inst
;
335 if (n_template_parm_scopes
< n_class_scopes
)
336 /* We've not seen enough template headers to match all the
337 specialized classes present. For example:
339 template <class T> void R<T>::S<T>::f(int);
341 This is invalid; there needs to be one set of template
342 parameters for each class. */
343 return tsk_insufficient_parms
;
344 else if (n_template_parm_scopes
== n_class_scopes
)
345 /* We're processing a non-template declaration (even though it may
346 be a member of a template class.) For example:
348 template <class T> void S<T>::f(int);
350 The `class T' matches the `S<T>', leaving no template headers
351 corresponding to the `f'. */
353 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
354 /* We've got too many template headers. For example:
356 template <> template <class T> void f (T);
358 There need to be more enclosing classes. */
359 return tsk_excessive_parms
;
361 /* This must be a template. It's of the form:
363 template <class T> template <class U> void S<T>::f(U);
365 This is a specialization if the innermost level was a
366 specialization; otherwise it's just a definition of the
368 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
371 /* Exit the current scope. */
379 /* When a label goes out of scope, check to see if that label was used
380 in a valid manner, and issue any appropriate warnings or errors. */
383 pop_label (tree label
, tree old_value
)
385 if (!processing_template_decl
)
387 if (DECL_INITIAL (label
) == NULL_TREE
)
391 error ("label %q+D used but not defined", label
);
392 location
= input_location
;
393 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
394 /* Avoid crashing later. */
395 define_label (location
, DECL_NAME (label
));
398 warn_for_unused_label (label
);
401 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
404 /* At the end of a function, all labels declared within the function
405 go out of scope. BLOCK is the top-level block for the
409 pop_labels_1 (named_label_entry
**slot
, tree block
)
411 struct named_label_entry
*ent
= *slot
;
413 pop_label (ent
->label_decl
, NULL_TREE
);
415 /* Put the labels into the "variables" of the top-level block,
416 so debugger can see them. */
417 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
418 BLOCK_VARS (block
) = ent
->label_decl
;
420 named_labels
->clear_slot (slot
);
426 pop_labels (tree block
)
430 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
435 /* At the end of a block with local labels, restore the outer definition. */
438 pop_local_label (tree label
, tree old_value
)
440 struct named_label_entry dummy
;
442 pop_label (label
, old_value
);
444 dummy
.label_decl
= label
;
445 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
446 named_labels
->clear_slot (slot
);
449 /* The following two routines are used to interface to Objective-C++.
450 The binding level is purposely treated as an opaque type. */
453 objc_get_current_scope (void)
455 return current_binding_level
;
458 /* The following routine is used by the NeXT-style SJLJ exceptions;
459 variables get marked 'volatile' so as to not be clobbered by
460 _setjmp()/_longjmp() calls. All variables in the current scope,
461 as well as parent scopes up to (but not including) ENCLOSING_BLK
462 shall be thusly marked. */
465 objc_mark_locals_volatile (void *enclosing_blk
)
467 cp_binding_level
*scope
;
469 for (scope
= current_binding_level
;
470 scope
&& scope
!= enclosing_blk
;
471 scope
= scope
->level_chain
)
475 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
476 objc_volatilize_decl (decl
);
478 /* Do not climb up past the current function. */
479 if (scope
->kind
== sk_function_parms
)
484 /* Update data for defined and undefined labels when leaving a scope. */
487 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
489 named_label_entry
*ent
= *slot
;
490 cp_binding_level
*obl
= bl
->level_chain
;
492 if (ent
->binding_level
== bl
)
496 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
497 TREE_LISTs representing OVERLOADs, so be careful. */
498 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
500 : TREE_CHAIN (decl
)))
501 if (decl_jump_unsafe (decl
))
502 vec_safe_push (ent
->bad_decls
, decl
);
504 ent
->binding_level
= obl
;
505 ent
->names_in_scope
= obl
->names
;
509 ent
->in_try_scope
= true;
512 ent
->in_catch_scope
= true;
515 ent
->in_omp_scope
= true;
523 struct named_label_use_entry
*use
;
525 for (use
= ent
->uses
; use
; use
= use
->next
)
526 if (use
->binding_level
== bl
)
528 use
->binding_level
= obl
;
529 use
->names_in_scope
= obl
->names
;
530 if (bl
->kind
== sk_omp
)
531 use
->in_omp_scope
= true;
538 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
539 when errors were reported, except for -Werror-unused-but-set-*. */
540 static int unused_but_set_errorcount
;
542 /* Exit a binding level.
543 Pop the level off, and restore the state of the identifier-decl mappings
544 that were in effect when this level was entered.
546 If KEEP == 1, this level had explicit declarations, so
547 and create a "block" (a BLOCK node) for the level
548 to record its declarations and subblocks for symbol table output.
550 If FUNCTIONBODY is nonzero, this level is the body of a function,
551 so create a block as if KEEP were set and also clear out all
554 If REVERSE is nonzero, reverse the order of decls before putting
555 them into the BLOCK. */
558 poplevel (int keep
, int reverse
, int functionbody
)
561 /* The chain of decls was accumulated in reverse order.
562 Put it into forward order, just for cleanliness. */
567 int leaving_for_scope
;
570 cp_label_binding
*label_bind
;
572 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
577 gcc_assert (current_binding_level
->kind
!= sk_class
);
579 if (current_binding_level
->kind
== sk_cleanup
)
581 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
583 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
585 /* We used to use KEEP == 2 to indicate that the new block should go
586 at the beginning of the list of blocks at this binding level,
587 rather than the end. This hack is no longer used. */
588 gcc_assert (keep
== 0 || keep
== 1);
590 if (current_binding_level
->keep
)
593 /* Any uses of undefined labels, and any defined labels, now operate
594 under constraints of next binding contour. */
595 if (cfun
&& !functionbody
&& named_labels
)
596 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
597 (current_binding_level
);
599 /* Get the decls in the order they were written.
600 Usually current_binding_level->names is in reverse order.
601 But parameter decls were previously put in forward order. */
604 current_binding_level
->names
605 = decls
= nreverse (current_binding_level
->names
);
607 decls
= current_binding_level
->names
;
609 /* If there were any declarations or structure tags in that level,
610 or if this level is a function body,
611 create a BLOCK to record them for the life of this function. */
613 /* Avoid function body block if possible. */
614 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
616 else if (keep
== 1 || functionbody
)
617 block
= make_node (BLOCK
);
618 if (block
!= NULL_TREE
)
620 BLOCK_VARS (block
) = decls
;
621 BLOCK_SUBBLOCKS (block
) = subblocks
;
624 /* In each subblock, record that this is its superior. */
626 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
627 BLOCK_SUPERCONTEXT (link
) = block
;
629 /* We still support the old for-scope rules, whereby the variables
630 in a for-init statement were in scope after the for-statement
631 ended. We only use the new rules if flag_new_for_scope is
634 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
636 /* Before we remove the declarations first check for unused variables. */
637 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
638 && current_binding_level
->kind
!= sk_template_parms
639 && !processing_template_decl
)
640 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
642 /* There are cases where D itself is a TREE_LIST. See in
643 push_local_binding where the list of decls returned by
644 getdecls is built. */
645 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
646 tree type
= TREE_TYPE (decl
);
648 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
649 && ! DECL_IN_SYSTEM_HEADER (decl
)
650 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
651 && type
!= error_mark_node
652 && (!CLASS_TYPE_P (type
)
653 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
654 || lookup_attribute ("warn_unused",
655 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
657 if (! TREE_USED (decl
))
658 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
659 else if (DECL_CONTEXT (decl
) == current_function_decl
660 // For -Wunused-but-set-variable leave references alone.
661 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
662 && errorcount
== unused_but_set_errorcount
)
664 warning (OPT_Wunused_but_set_variable
,
665 "variable %q+D set but not used", decl
);
666 unused_but_set_errorcount
= errorcount
;
671 /* Remove declarations for all the DECLs in this level. */
672 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
674 if (leaving_for_scope
&& VAR_P (link
)
675 /* It's hard to make this ARM compatibility hack play nicely with
676 lambdas, and it really isn't necessary in C++11 mode. */
677 && cxx_dialect
< cxx11
680 tree name
= DECL_NAME (link
);
684 ob
= outer_binding (name
,
685 IDENTIFIER_BINDING (name
),
688 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
690 ns_binding
= NULL_TREE
;
692 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
693 /* We have something like:
698 and we are leaving the `for' scope. There's no reason to
699 keep the binding of the inner `i' in this case. */
700 pop_binding (name
, link
);
701 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
702 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
703 /* Here, we have something like:
711 We must pop the for-scope binding so we know what's a
712 type and what isn't. */
713 pop_binding (name
, link
);
716 /* Mark this VAR_DECL as dead so that we can tell we left it
717 there only for backward compatibility. */
718 DECL_DEAD_FOR_LOCAL (link
) = 1;
720 /* Keep track of what should have happened when we
721 popped the binding. */
724 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
725 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
728 /* Add it to the list of dead variables in the next
729 outermost binding to that we can remove these when we
730 leave that binding. */
732 current_binding_level
->level_chain
->dead_vars_from_for
,
735 /* Although we don't pop the cxx_binding, we do clear
736 its SCOPE since the scope is going away now. */
737 IDENTIFIER_BINDING (name
)->scope
738 = current_binding_level
->level_chain
;
745 /* Remove the binding. */
748 if (TREE_CODE (decl
) == TREE_LIST
)
749 decl
= TREE_VALUE (decl
);
752 if (TREE_CODE (name
) == OVERLOAD
)
753 name
= OVL_FUNCTION (name
);
755 gcc_assert (DECL_P (name
));
756 pop_binding (DECL_NAME (name
), decl
);
760 /* Remove declarations for any `for' variables from inner scopes
761 that we kept around. */
762 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
764 pop_binding (DECL_NAME (decl
), decl
);
766 /* Restore the IDENTIFIER_TYPE_VALUEs. */
767 for (link
= current_binding_level
->type_shadowed
;
768 link
; link
= TREE_CHAIN (link
))
769 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
771 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
772 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
774 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
776 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
777 list if a `using' declaration put them there. The debugging
778 back ends won't understand OVERLOAD, so we remove them here.
779 Because the BLOCK_VARS are (temporarily) shared with
780 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
781 popped all the bindings. */
786 for (d
= &BLOCK_VARS (block
); *d
; )
788 if (TREE_CODE (*d
) == TREE_LIST
)
789 *d
= TREE_CHAIN (*d
);
791 d
= &DECL_CHAIN (*d
);
795 /* If the level being exited is the top level of a function,
796 check over all the labels. */
801 /* Since this is the top level block of a function, the vars are
802 the function's parameters. Don't leave them in the BLOCK
803 because they are found in the FUNCTION_DECL instead. */
804 BLOCK_VARS (block
) = 0;
808 pop_labels (subblocks
);
811 kind
= current_binding_level
->kind
;
812 if (kind
== sk_cleanup
)
816 /* If this is a temporary binding created for a cleanup, then we'll
817 have pushed a statement list level. Pop that, create a new
818 BIND_EXPR for the block, and insert it into the stream. */
819 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
820 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
827 /* The current function is being defined, so its DECL_INITIAL
828 should be error_mark_node. */
829 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
830 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
833 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
835 if (BLOCK_SUBBLOCKS (subblocks
))
836 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
839 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
843 current_binding_level
->blocks
844 = block_chainon (current_binding_level
->blocks
, block
);
846 /* If we did not make a block for the level just exited,
847 any blocks made for inner levels
848 (since they cannot be recorded as subblocks in that level)
849 must be carried forward so they will later become subblocks
850 of something else. */
852 current_binding_level
->blocks
853 = block_chainon (current_binding_level
->blocks
, subblocks
);
855 /* Each and every BLOCK node created here in `poplevel' is important
856 (e.g. for proper debugging information) so if we created one
857 earlier, mark it as "used". */
859 TREE_USED (block
) = 1;
861 /* All temporary bindings created for cleanups are popped silently. */
862 if (kind
== sk_cleanup
)
865 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
869 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
870 itself, calling F for each. The DATA is passed to F as well. */
873 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
876 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
878 result
|= (*f
) (name_space
, data
);
880 for (; current
; current
= DECL_CHAIN (current
))
881 result
|= walk_namespaces_r (current
, f
, data
);
886 /* Walk all the namespaces, calling F for each. The DATA is passed to
890 walk_namespaces (walk_namespaces_fn f
, void* data
)
892 return walk_namespaces_r (global_namespace
, f
, data
);
895 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
896 DATA is non-NULL, this is the last time we will call
897 wrapup_global_declarations for this NAMESPACE. */
900 wrapup_globals_for_namespace (tree name_space
, void* data
)
902 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
903 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
904 tree
*vec
= statics
->address ();
905 int len
= statics
->length ();
906 int last_time
= (data
!= 0);
910 check_global_declarations (vec
, len
);
911 emit_debug_global_declarations (vec
, len
);
915 /* Write out any globals that need to be output. */
916 return wrapup_global_declarations (vec
, len
);
920 /* In C++, you don't have to write `struct S' to refer to `S'; you
921 can just use `S'. We accomplish this by creating a TYPE_DECL as
922 if the user had written `typedef struct S S'. Create and return
923 the TYPE_DECL for TYPE. */
926 create_implicit_typedef (tree name
, tree type
)
930 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
931 DECL_ARTIFICIAL (decl
) = 1;
932 /* There are other implicit type declarations, like the one *within*
933 a class that allows you to write `S::S'. We must distinguish
935 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
936 TYPE_NAME (type
) = decl
;
937 TYPE_STUB_DECL (type
) = decl
;
942 /* Remember a local name for name-mangling purposes. */
945 push_local_name (tree decl
)
950 timevar_start (TV_NAME_LOOKUP
);
952 name
= DECL_NAME (decl
);
954 nelts
= vec_safe_length (local_names
);
955 for (i
= 0; i
< nelts
; i
++)
957 t
= (*local_names
)[i
];
958 if (DECL_NAME (t
) == name
)
960 if (!DECL_LANG_SPECIFIC (decl
))
961 retrofit_lang_decl (decl
);
962 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
963 if (DECL_DISCRIMINATOR_SET_P (t
))
964 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
966 DECL_DISCRIMINATOR (decl
) = 1;
968 (*local_names
)[i
] = decl
;
969 timevar_stop (TV_NAME_LOOKUP
);
974 vec_safe_push (local_names
, decl
);
975 timevar_stop (TV_NAME_LOOKUP
);
978 /* Subroutine of duplicate_decls: return truthvalue of whether
979 or not types of these decls match.
981 For C++, we must compare the parameter list so that `int' can match
982 `int&' in a parameter position, but `int&' is not confused with
986 decls_match (tree newdecl
, tree olddecl
)
990 if (newdecl
== olddecl
)
993 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
994 /* If the two DECLs are not even the same kind of thing, we're not
995 interested in their types. */
998 gcc_assert (DECL_P (newdecl
));
1000 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1002 tree f1
= TREE_TYPE (newdecl
);
1003 tree f2
= TREE_TYPE (olddecl
);
1004 tree p1
= TYPE_ARG_TYPES (f1
);
1005 tree p2
= TYPE_ARG_TYPES (f2
);
1008 /* Specializations of different templates are different functions
1009 even if they have the same type. */
1010 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
1011 ? DECL_TI_TEMPLATE (newdecl
)
1013 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
1014 ? DECL_TI_TEMPLATE (olddecl
)
1019 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1020 && ! (DECL_EXTERN_C_P (newdecl
)
1021 && DECL_EXTERN_C_P (olddecl
)))
1024 /* A new declaration doesn't match a built-in one unless it
1025 is also extern "C". */
1026 if (DECL_IS_BUILTIN (olddecl
)
1027 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1030 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1033 /* A declaration with deduced return type should use its pre-deduction
1034 type for declaration matching. */
1035 r2
= fndecl_declared_return_type (olddecl
);
1037 if (same_type_p (TREE_TYPE (f1
), r2
))
1039 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1040 && (DECL_BUILT_IN (olddecl
)
1041 #ifndef NO_IMPLICIT_EXTERN_C
1042 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1043 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1047 types_match
= self_promoting_args_p (p1
);
1048 if (p1
== void_list_node
)
1049 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1051 #ifndef NO_IMPLICIT_EXTERN_C
1052 else if (!prototype_p (f1
)
1053 && (DECL_EXTERN_C_P (olddecl
)
1054 && DECL_IN_SYSTEM_HEADER (olddecl
)
1055 && !DECL_CLASS_SCOPE_P (olddecl
))
1056 && (DECL_EXTERN_C_P (newdecl
)
1057 && DECL_IN_SYSTEM_HEADER (newdecl
)
1058 && !DECL_CLASS_SCOPE_P (newdecl
)))
1060 types_match
= self_promoting_args_p (p2
);
1061 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1067 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1068 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1069 || comp_type_attributes (TREE_TYPE (newdecl
),
1070 TREE_TYPE (olddecl
)) != 0);
1075 /* The decls dont match if they correspond to two different versions
1076 of the same function. Disallow extern "C" functions to be
1077 versions for now. */
1079 && !DECL_EXTERN_C_P (newdecl
)
1080 && !DECL_EXTERN_C_P (olddecl
)
1081 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1083 /* Mark functions as versions if necessary. Modify the mangled decl
1084 name if necessary. */
1085 if (DECL_FUNCTION_VERSIONED (newdecl
)
1086 && DECL_FUNCTION_VERSIONED (olddecl
))
1088 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1090 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1091 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1092 mangle_decl (newdecl
);
1094 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1096 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1097 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1098 mangle_decl (olddecl
);
1100 cgraph_node::record_function_versions (olddecl
, newdecl
);
1104 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1106 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1107 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1110 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1111 DECL_TEMPLATE_PARMS (olddecl
)))
1114 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1115 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1116 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1118 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1119 DECL_TEMPLATE_RESULT (newdecl
));
1123 /* Need to check scope for variable declaration (VAR_DECL).
1124 For typedef (TYPE_DECL), scope is ignored. */
1126 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1128 Two declarations for an object with C language linkage
1129 with the same name (ignoring the namespace that qualify
1130 it) that appear in different namespace scopes refer to
1132 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1135 if (TREE_TYPE (newdecl
) == error_mark_node
)
1136 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1137 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1138 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1139 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1142 types_match
= comptypes (TREE_TYPE (newdecl
),
1143 TREE_TYPE (olddecl
),
1144 COMPARE_REDECLARATION
);
1150 /* If NEWDECL is `static' and an `extern' was seen previously,
1151 warn about it. OLDDECL is the previous declaration.
1153 Note that this does not apply to the C++ case of declaring
1154 a variable `extern const' and then later `const'.
1156 Don't complain about built-in functions, since they are beyond
1157 the user's control. */
1160 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1162 if (TREE_CODE (newdecl
) == TYPE_DECL
1163 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1164 || TREE_CODE (newdecl
) == CONST_DECL
1165 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1168 /* Don't get confused by static member functions; that's a different
1170 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1171 && DECL_STATIC_FUNCTION_P (newdecl
))
1174 /* If the old declaration was `static', or the new one isn't, then
1175 everything is OK. */
1176 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1179 /* It's OK to declare a builtin function as `static'. */
1180 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1181 && DECL_ARTIFICIAL (olddecl
))
1184 if (permerror (input_location
,
1185 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1186 inform (input_location
, "previous declaration of %q+D", olddecl
);
1189 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1190 function templates. If their exception specifications do not
1191 match, issue a diagnostic. */
1194 check_redeclaration_exception_specification (tree new_decl
,
1197 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1198 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1200 /* Two default specs are equivalent, don't force evaluation. */
1201 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1202 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1205 maybe_instantiate_noexcept (new_decl
);
1206 maybe_instantiate_noexcept (old_decl
);
1207 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1208 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1212 If any declaration of a function has an exception-specification,
1213 all declarations, including the definition and an explicit
1214 specialization, of that function shall have an
1215 exception-specification with the same set of type-ids. */
1216 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1217 && ! DECL_IS_BUILTIN (old_decl
)
1219 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1221 error ("declaration of %qF has a different exception specifier",
1223 error ("from previous declaration %q+F", old_decl
);
1227 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1228 Otherwise issue diagnostics. */
1231 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1233 old_decl
= STRIP_TEMPLATE (old_decl
);
1234 new_decl
= STRIP_TEMPLATE (new_decl
);
1235 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1236 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1238 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1239 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1241 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1243 if (DECL_BUILT_IN (old_decl
))
1245 /* Hide a built-in declaration. */
1246 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1247 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1250 /* 7.1.5 [dcl.constexpr]
1251 Note: An explicit specialization can differ from the template
1252 declaration with respect to the constexpr specifier. */
1253 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1254 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1257 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1258 error ("from previous declaration %q+D", old_decl
);
1264 /* DECL is a redeclaration of a function or function template. If
1265 it does have default arguments issue a diagnostic. Note: this
1266 function is used to enforce the requirements in C++11 8.3.6 about
1267 no default arguments in redeclarations. */
1270 check_redeclaration_no_default_args (tree decl
)
1272 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1274 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1275 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1276 if (TREE_PURPOSE (t
))
1278 permerror (input_location
,
1279 "redeclaration of %q#D may not have default "
1285 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1286 && lookup_attribute ("gnu_inline", \
1287 DECL_ATTRIBUTES (fn)))
1289 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1290 If the redeclaration is invalid, a diagnostic is issued, and the
1291 error_mark_node is returned. Otherwise, OLDDECL is returned.
1293 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1296 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1299 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1301 unsigned olddecl_uid
= DECL_UID (olddecl
);
1302 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1303 int new_defines_function
= 0;
1304 tree new_template_info
;
1306 if (newdecl
== olddecl
)
1309 types_match
= decls_match (newdecl
, olddecl
);
1311 /* If either the type of the new decl or the type of the old decl is an
1312 error_mark_node, then that implies that we have already issued an
1313 error (earlier) for some bogus type specification, and in that case,
1314 it is rather pointless to harass the user with yet more error message
1315 about the same declaration, so just pretend the types match here. */
1316 if (TREE_TYPE (newdecl
) == error_mark_node
1317 || TREE_TYPE (olddecl
) == error_mark_node
)
1318 return error_mark_node
;
1320 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1321 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1323 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1324 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1325 && check_raw_literal_operator (olddecl
))
1326 error ("literal operator template %q+D conflicts with"
1327 " raw literal operator %qD", newdecl
, olddecl
);
1328 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1329 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1330 && check_raw_literal_operator (newdecl
))
1331 error ("raw literal operator %q+D conflicts with"
1332 " literal operator template %qD", newdecl
, olddecl
);
1335 if (DECL_P (olddecl
)
1336 && TREE_CODE (newdecl
) == FUNCTION_DECL
1337 && TREE_CODE (olddecl
) == FUNCTION_DECL
1338 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1340 if (DECL_DECLARED_INLINE_P (newdecl
)
1341 && DECL_UNINLINABLE (newdecl
)
1342 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1343 /* Already warned elsewhere. */;
1344 else if (DECL_DECLARED_INLINE_P (olddecl
)
1345 && DECL_UNINLINABLE (olddecl
)
1346 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1347 /* Already warned. */;
1348 else if (DECL_DECLARED_INLINE_P (newdecl
)
1349 && DECL_UNINLINABLE (olddecl
)
1350 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1352 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1354 inform (DECL_SOURCE_LOCATION (olddecl
),
1355 "previous declaration of %qD with attribute noinline",
1358 else if (DECL_DECLARED_INLINE_P (olddecl
)
1359 && DECL_UNINLINABLE (newdecl
)
1360 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1362 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1363 "attribute noinline", newdecl
))
1364 inform (DECL_SOURCE_LOCATION (olddecl
),
1365 "previous declaration of %qD was inline",
1370 /* Check for redeclaration and other discrepancies. */
1371 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1372 && DECL_ARTIFICIAL (olddecl
))
1374 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1375 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1377 /* Avoid warnings redeclaring built-ins which have not been
1378 explicitly declared. */
1379 if (DECL_ANTICIPATED (olddecl
))
1382 /* If you declare a built-in or predefined function name as static,
1383 the old definition is overridden, but optionally warn this was a
1384 bad choice of name. */
1385 if (! TREE_PUBLIC (newdecl
))
1387 warning (OPT_Wshadow
,
1388 DECL_BUILT_IN (olddecl
)
1389 ? G_("shadowing built-in function %q#D")
1390 : G_("shadowing library function %q#D"), olddecl
);
1391 /* Discard the old built-in function. */
1394 /* If the built-in is not ansi, then programs can override
1395 it even globally without an error. */
1396 else if (! DECL_BUILT_IN (olddecl
))
1397 warning (0, "library function %q#D redeclared as non-function %q#D",
1400 error ("declaration of %q#D conflicts with built-in "
1401 "declaration %q#D", newdecl
, olddecl
);
1404 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1406 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1407 error_at (DECL_SOURCE_LOCATION (newdecl
),
1408 "redeclaration of %<pragma omp declare reduction%>");
1409 inform (DECL_SOURCE_LOCATION (olddecl
),
1410 "previous %<pragma omp declare reduction%> declaration");
1411 return error_mark_node
;
1413 else if (!types_match
)
1415 /* Avoid warnings redeclaring built-ins which have not been
1416 explicitly declared. */
1417 if (DECL_ANTICIPATED (olddecl
))
1419 /* Deal with fileptr_type_node. FILE type is not known
1420 at the time we create the builtins. */
1423 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1424 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1426 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1429 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1431 tree t
= TREE_VALUE (t1
);
1434 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1435 == get_identifier ("FILE")
1436 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1438 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1440 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1441 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1442 types_match
= decls_match (newdecl
, olddecl
);
1444 return duplicate_decls (newdecl
, olddecl
,
1446 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1449 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1452 else if ((DECL_EXTERN_C_P (newdecl
)
1453 && DECL_EXTERN_C_P (olddecl
))
1454 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1455 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1457 /* A near match; override the builtin. */
1459 if (TREE_PUBLIC (newdecl
))
1460 warning (0, "new declaration %q#D ambiguates built-in "
1461 "declaration %q#D", newdecl
, olddecl
);
1463 warning (OPT_Wshadow
,
1464 DECL_BUILT_IN (olddecl
)
1465 ? G_("shadowing built-in function %q#D")
1466 : G_("shadowing library function %q#D"), olddecl
);
1469 /* Discard the old built-in function. */
1472 /* Replace the old RTL to avoid problems with inlining. */
1473 COPY_DECL_RTL (newdecl
, olddecl
);
1475 /* Even if the types match, prefer the new declarations type for
1476 built-ins which have not been explicitly declared, for
1477 exception lists, etc... */
1478 else if (DECL_IS_BUILTIN (olddecl
))
1480 tree type
= TREE_TYPE (newdecl
);
1481 tree attribs
= (*targetm
.merge_type_attributes
)
1482 (TREE_TYPE (olddecl
), type
);
1484 type
= cp_build_type_attribute_variant (type
, attribs
);
1485 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1488 /* If a function is explicitly declared "throw ()", propagate that to
1489 the corresponding builtin. */
1490 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1491 && DECL_ANTICIPATED (olddecl
)
1492 && TREE_NOTHROW (newdecl
)
1493 && !TREE_NOTHROW (olddecl
))
1495 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1496 tree tmpdecl
= builtin_decl_explicit (fncode
);
1497 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1498 TREE_NOTHROW (tmpdecl
) = 1;
1501 /* Whether or not the builtin can throw exceptions has no
1502 bearing on this declarator. */
1503 TREE_NOTHROW (olddecl
) = 0;
1505 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1507 /* If a builtin function is redeclared as `static', merge
1508 the declarations, but make the original one static. */
1509 DECL_THIS_STATIC (olddecl
) = 1;
1510 TREE_PUBLIC (olddecl
) = 0;
1512 /* Make the old declaration consistent with the new one so
1513 that all remnants of the builtin-ness of this function
1514 will be banished. */
1515 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1516 COPY_DECL_RTL (newdecl
, olddecl
);
1519 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1521 /* C++ Standard, 3.3, clause 4:
1522 "[Note: a namespace name or a class template name must be unique
1523 in its declarative region (7.3.2, clause 14). ]" */
1524 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1525 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1526 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1527 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1528 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1529 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1531 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1532 && TREE_CODE (newdecl
) != TYPE_DECL
)
1533 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1534 && TREE_CODE (olddecl
) != TYPE_DECL
))
1536 /* We do nothing special here, because C++ does such nasty
1537 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1538 get shadowed, and know that if we need to find a TYPE_DECL
1539 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1540 slot of the identifier. */
1544 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1545 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1546 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1547 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1551 error ("%q#D redeclared as different kind of symbol", newdecl
);
1552 if (TREE_CODE (olddecl
) == TREE_LIST
)
1553 olddecl
= TREE_VALUE (olddecl
);
1554 inform (DECL_SOURCE_LOCATION (olddecl
),
1555 "previous declaration %q#D", olddecl
);
1557 return error_mark_node
;
1559 else if (!types_match
)
1561 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1562 /* These are certainly not duplicate declarations; they're
1563 from different scopes. */
1566 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1568 /* The name of a class template may not be declared to refer to
1569 any other template, class, function, object, namespace, value,
1570 or type in the same scope. */
1571 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1572 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1574 error ("conflicting declaration of template %q#D", newdecl
);
1575 inform (DECL_SOURCE_LOCATION (olddecl
),
1576 "previous declaration %q#D", olddecl
);
1577 return error_mark_node
;
1579 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1580 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1581 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1582 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1583 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1584 DECL_TEMPLATE_PARMS (olddecl
))
1585 /* Template functions can be disambiguated by
1587 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1588 TREE_TYPE (TREE_TYPE (olddecl
))))
1590 error ("ambiguating new declaration %q#D", newdecl
);
1591 inform (DECL_SOURCE_LOCATION (olddecl
),
1592 "old declaration %q#D", olddecl
);
1596 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1598 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1600 error ("conflicting declaration of C function %q#D",
1602 inform (DECL_SOURCE_LOCATION (olddecl
),
1603 "previous declaration %q#D", olddecl
);
1606 /* For function versions, params and types match, but they
1607 are not ambiguous. */
1608 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1609 && !DECL_FUNCTION_VERSIONED (olddecl
))
1610 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1611 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1613 error ("ambiguating new declaration of %q#D", newdecl
);
1614 inform (DECL_SOURCE_LOCATION (olddecl
),
1615 "old declaration %q#D", olddecl
);
1616 return error_mark_node
;
1623 error ("conflicting declaration %q#D", newdecl
);
1624 inform (DECL_SOURCE_LOCATION (olddecl
),
1625 "previous declaration as %q#D", olddecl
);
1626 return error_mark_node
;
1629 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1630 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1631 && (!DECL_TEMPLATE_INFO (newdecl
)
1632 || (DECL_TI_TEMPLATE (newdecl
)
1633 != DECL_TI_TEMPLATE (olddecl
))))
1634 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1635 && (!DECL_TEMPLATE_INFO (olddecl
)
1636 || (DECL_TI_TEMPLATE (olddecl
)
1637 != DECL_TI_TEMPLATE (newdecl
))))))
1638 /* It's OK to have a template specialization and a non-template
1639 with the same type, or to have specializations of two
1640 different templates with the same type. Note that if one is a
1641 specialization, and the other is an instantiation of the same
1642 template, that we do not exit at this point. That situation
1643 can occur if we instantiate a template class, and then
1644 specialize one of its methods. This situation is valid, but
1645 the declarations must be merged in the usual way. */
1647 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1648 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1649 && !DECL_USE_TEMPLATE (newdecl
))
1650 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1651 && !DECL_USE_TEMPLATE (olddecl
))))
1652 /* One of the declarations is a template instantiation, and the
1653 other is not a template at all. That's OK. */
1655 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1657 /* In [namespace.alias] we have:
1659 In a declarative region, a namespace-alias-definition can be
1660 used to redefine a namespace-alias declared in that declarative
1661 region to refer only to the namespace to which it already
1664 Therefore, if we encounter a second alias directive for the same
1665 alias, we can just ignore the second directive. */
1666 if (DECL_NAMESPACE_ALIAS (newdecl
)
1667 && (DECL_NAMESPACE_ALIAS (newdecl
)
1668 == DECL_NAMESPACE_ALIAS (olddecl
)))
1670 /* [namespace.alias]
1672 A namespace-name or namespace-alias shall not be declared as
1673 the name of any other entity in the same declarative region.
1674 A namespace-name defined at global scope shall not be
1675 declared as the name of any other entity in any global scope
1677 error ("conflicting declaration of namespace %qD", newdecl
);
1678 inform (DECL_SOURCE_LOCATION (olddecl
),
1679 "previous declaration of namespace %qD here", olddecl
);
1680 return error_mark_node
;
1684 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1687 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1688 if (DECL_NAME (olddecl
) != NULL_TREE
)
1689 inform (input_location
,
1690 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1691 ? G_("%q+#D previously defined here")
1692 : G_("%q+#D previously declared here"), olddecl
);
1693 return error_mark_node
;
1695 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1696 && DECL_INITIAL (olddecl
) != NULL_TREE
1697 && !prototype_p (TREE_TYPE (olddecl
))
1698 && prototype_p (TREE_TYPE (newdecl
)))
1700 /* Prototype decl follows defn w/o prototype. */
1701 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1702 "prototype specified for %q#D", newdecl
))
1703 inform (DECL_SOURCE_LOCATION (olddecl
),
1704 "previous non-prototype definition here");
1706 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1707 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1710 If two declarations of the same function or object
1711 specify different linkage-specifications ..., the program
1712 is ill-formed.... Except for functions with C++ linkage,
1713 a function declaration without a linkage specification
1714 shall not precede the first linkage specification for
1715 that function. A function can be declared without a
1716 linkage specification after an explicit linkage
1717 specification has been seen; the linkage explicitly
1718 specified in the earlier declaration is not affected by
1719 such a function declaration.
1721 DR 563 raises the question why the restrictions on
1722 functions should not also apply to objects. Older
1723 versions of G++ silently ignore the linkage-specification
1731 which is clearly wrong. Therefore, we now treat objects
1733 if (current_lang_depth () == 0)
1735 /* There is no explicit linkage-specification, so we use
1736 the linkage from the previous declaration. */
1737 if (!DECL_LANG_SPECIFIC (newdecl
))
1738 retrofit_lang_decl (newdecl
);
1739 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1743 error ("conflicting declaration of %q#D with %qL linkage",
1744 newdecl
, DECL_LANGUAGE (newdecl
));
1745 inform (DECL_SOURCE_LOCATION (olddecl
),
1746 "previous declaration with %qL linkage",
1747 DECL_LANGUAGE (olddecl
));
1751 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1753 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1755 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1756 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1757 && (/* grokfndecl passes member function templates too
1758 as FUNCTION_DECLs. */
1759 DECL_TEMPLATE_INFO (olddecl
)
1761 Default arguments for a member function of a class
1762 template shall be specified on the initial declaration
1763 of the member function within the class template. */
1764 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1765 check_redeclaration_no_default_args (newdecl
);
1768 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1769 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1772 for (; t1
&& t1
!= void_list_node
;
1773 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1774 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1776 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1779 if (permerror (input_location
,
1780 "default argument given for parameter "
1781 "%d of %q#D", i
, newdecl
))
1782 inform (DECL_SOURCE_LOCATION (olddecl
),
1783 "previous specification in %q#D here",
1788 error ("default argument given for parameter %d "
1789 "of %q#D", i
, newdecl
);
1790 inform (DECL_SOURCE_LOCATION (olddecl
),
1791 "previous specification in %q#D here",
1799 /* Do not merge an implicit typedef with an explicit one. In:
1803 typedef class A A __attribute__ ((foo));
1805 the attribute should apply only to the typedef. */
1806 if (TREE_CODE (olddecl
) == TYPE_DECL
1807 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1808 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1811 /* If new decl is `static' and an `extern' was seen previously,
1813 warn_extern_redeclared_static (newdecl
, olddecl
);
1815 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1816 return error_mark_node
;
1818 /* We have committed to returning 1 at this point. */
1819 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1821 /* Now that functions must hold information normally held
1822 by field decls, there is extra work to do so that
1823 declaration information does not get destroyed during
1825 if (DECL_VINDEX (olddecl
))
1826 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1827 if (DECL_CONTEXT (olddecl
))
1828 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1829 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1830 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1831 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1832 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1833 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1834 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1835 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1836 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1837 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1838 SET_OVERLOADED_OPERATOR_CODE
1839 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1840 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1842 /* Optionally warn about more than one declaration for the same
1843 name, but don't warn about a function declaration followed by a
1845 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1846 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1847 /* Don't warn about extern decl followed by definition. */
1848 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1849 /* Don't warn about friends, let add_friend take care of it. */
1850 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1851 /* Don't warn about declaration followed by specialization. */
1852 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1853 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1855 if (warning (OPT_Wredundant_decls
,
1856 "redundant redeclaration of %qD in same scope",
1858 inform (DECL_SOURCE_LOCATION (olddecl
),
1859 "previous declaration of %qD", olddecl
);
1862 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1863 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1865 if (DECL_DELETED_FN (newdecl
))
1867 error ("deleted definition of %qD", newdecl
);
1868 inform (DECL_SOURCE_LOCATION (olddecl
),
1869 "previous declaration of %qD", olddecl
);
1871 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1875 /* Deal with C++: must preserve virtual function table size. */
1876 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1878 tree newtype
= TREE_TYPE (newdecl
);
1879 tree oldtype
= TREE_TYPE (olddecl
);
1881 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1882 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1883 CLASSTYPE_FRIEND_CLASSES (newtype
)
1884 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1886 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1889 /* Copy all the DECL_... slots specified in the new decl
1890 except for any that we copy here from the old type. */
1891 DECL_ATTRIBUTES (newdecl
)
1892 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1894 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1896 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1897 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1898 && DECL_HIDDEN_FRIEND_P (olddecl
)
1899 && newdecl_is_friend
);
1902 DECL_ANTICIPATED (olddecl
) = 0;
1903 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1907 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1911 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1912 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1913 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1914 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1915 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1916 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1918 DECL_ATTRIBUTES (old_result
)
1919 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1921 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1923 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1924 declarations of a function template. */
1925 check_redeclaration_no_default_args (newdecl
);
1927 check_default_args (newdecl
);
1929 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1930 && DECL_INITIAL (new_result
))
1932 if (DECL_INITIAL (old_result
))
1933 DECL_UNINLINABLE (old_result
) = 1;
1935 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1936 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1937 DECL_NOT_REALLY_EXTERN (old_result
)
1938 = DECL_NOT_REALLY_EXTERN (new_result
);
1939 DECL_INTERFACE_KNOWN (old_result
)
1940 = DECL_INTERFACE_KNOWN (new_result
);
1941 DECL_DECLARED_INLINE_P (old_result
)
1942 = DECL_DECLARED_INLINE_P (new_result
);
1943 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1944 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1949 DECL_DECLARED_INLINE_P (old_result
)
1950 |= DECL_DECLARED_INLINE_P (new_result
);
1951 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1952 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1953 check_redeclaration_exception_specification (newdecl
, olddecl
);
1957 /* If the new declaration is a definition, update the file and
1958 line information on the declaration, and also make
1959 the old declaration the same definition. */
1960 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1962 DECL_SOURCE_LOCATION (olddecl
)
1963 = DECL_SOURCE_LOCATION (old_result
)
1964 = DECL_SOURCE_LOCATION (newdecl
);
1965 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1966 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1969 DECL_ARGUMENTS (old_result
)
1970 = DECL_ARGUMENTS (new_result
);
1971 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1972 parm
= DECL_CHAIN (parm
))
1973 DECL_CONTEXT (parm
) = old_result
;
1982 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1983 check_redeclaration_exception_specification (newdecl
, olddecl
);
1985 /* Automatically handles default parameters. */
1986 tree oldtype
= TREE_TYPE (olddecl
);
1989 /* For typedefs use the old type, as the new type's DECL_NAME points
1990 at newdecl, which will be ggc_freed. */
1991 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1994 /* Merge the data types specified in the two decls. */
1995 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1997 if (VAR_P (newdecl
))
1999 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
2000 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
2001 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
2002 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
2003 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
2004 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
2006 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2007 if (DECL_LANG_SPECIFIC (olddecl
)
2008 && CP_DECL_THREADPRIVATE_P (olddecl
))
2010 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2011 if (!DECL_LANG_SPECIFIC (newdecl
))
2012 retrofit_lang_decl (newdecl
);
2014 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2018 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2020 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2021 check_default_args (newdecl
);
2023 /* Lay the type out, unless already done. */
2024 if (! same_type_p (newtype
, oldtype
)
2025 && TREE_TYPE (newdecl
) != error_mark_node
2026 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2027 layout_type (TREE_TYPE (newdecl
));
2029 if ((VAR_P (newdecl
)
2030 || TREE_CODE (newdecl
) == PARM_DECL
2031 || TREE_CODE (newdecl
) == RESULT_DECL
2032 || TREE_CODE (newdecl
) == FIELD_DECL
2033 || TREE_CODE (newdecl
) == TYPE_DECL
)
2034 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2035 layout_decl (newdecl
, 0);
2037 /* Merge the type qualifiers. */
2038 if (TREE_READONLY (newdecl
))
2039 TREE_READONLY (olddecl
) = 1;
2040 if (TREE_THIS_VOLATILE (newdecl
))
2041 TREE_THIS_VOLATILE (olddecl
) = 1;
2042 if (TREE_NOTHROW (newdecl
))
2043 TREE_NOTHROW (olddecl
) = 1;
2045 /* Merge deprecatedness. */
2046 if (TREE_DEPRECATED (newdecl
))
2047 TREE_DEPRECATED (olddecl
) = 1;
2049 /* Preserve function specific target and optimization options */
2050 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2052 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2053 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2054 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2055 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2057 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2058 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2059 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2060 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2063 /* Merge the initialization information. */
2064 if (DECL_INITIAL (newdecl
) == NULL_TREE
2065 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2067 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2068 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2069 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2071 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2072 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2076 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2078 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2079 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2080 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2081 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2082 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2083 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2084 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2085 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2086 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2087 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2088 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2089 /* Keep the old RTL. */
2090 COPY_DECL_RTL (olddecl
, newdecl
);
2092 else if (VAR_P (newdecl
)
2093 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2095 /* Keep the old RTL. We cannot keep the old RTL if the old
2096 declaration was for an incomplete object and the new
2097 declaration is not since many attributes of the RTL will
2099 COPY_DECL_RTL (olddecl
, newdecl
);
2102 /* If cannot merge, then use the new type and qualifiers,
2103 and don't preserve the old rtl. */
2106 /* Clean out any memory we had of the old declaration. */
2107 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2109 TREE_VALUE (oldstatic
) = error_mark_node
;
2111 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2112 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2113 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2114 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2117 /* Merge the storage class information. */
2118 merge_weak (newdecl
, olddecl
);
2120 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2121 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2122 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2123 if (! DECL_EXTERNAL (olddecl
))
2124 DECL_EXTERNAL (newdecl
) = 0;
2126 new_template_info
= NULL_TREE
;
2127 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2129 bool new_redefines_gnu_inline
= false;
2131 if (new_defines_function
2132 && ((DECL_INTERFACE_KNOWN (olddecl
)
2133 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2134 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2135 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2136 == FUNCTION_DECL
))))
2140 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2141 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2143 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2146 if (!new_redefines_gnu_inline
)
2148 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2149 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2150 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2152 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2153 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2154 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2156 /* If the OLDDECL is an instantiation and/or specialization,
2157 then the NEWDECL must be too. But, it may not yet be marked
2158 as such if the caller has created NEWDECL, but has not yet
2159 figured out that it is a redeclaration. */
2160 if (!DECL_USE_TEMPLATE (newdecl
))
2161 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2163 /* Don't really know how much of the language-specific
2164 values we should copy from old to new. */
2165 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2166 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2167 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2168 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2170 if (LANG_DECL_HAS_MIN (newdecl
))
2172 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2173 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2174 if (DECL_TEMPLATE_INFO (newdecl
))
2176 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2177 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2178 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2179 /* Remember the presence of explicit specialization args. */
2180 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2181 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2183 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2185 /* Only functions have these fields. */
2186 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2188 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2189 DECL_BEFRIENDING_CLASSES (newdecl
)
2190 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2191 DECL_BEFRIENDING_CLASSES (olddecl
));
2192 /* DECL_THUNKS is only valid for virtual functions,
2193 otherwise it is a DECL_FRIEND_CONTEXT. */
2194 if (DECL_VIRTUAL_P (newdecl
))
2195 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2197 /* Only variables have this field. */
2198 else if (VAR_P (newdecl
)
2199 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2200 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2203 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2207 /* Merge parameter attributes. */
2208 tree oldarg
, newarg
;
2209 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2210 newarg
= DECL_ARGUMENTS(newdecl
);
2212 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2213 DECL_ATTRIBUTES (newarg
)
2214 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2215 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2218 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2219 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2221 /* If newdecl is not a specialization, then it is not a
2222 template-related function at all. And that means that we
2223 should have exited above, returning 0. */
2224 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2226 if (DECL_ODR_USED (olddecl
))
2227 /* From [temp.expl.spec]:
2229 If a template, a member template or the member of a class
2230 template is explicitly specialized then that
2231 specialization shall be declared before the first use of
2232 that specialization that would cause an implicit
2233 instantiation to take place, in every translation unit in
2234 which such a use occurs. */
2235 error ("explicit specialization of %qD after first use",
2238 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2239 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2240 && DECL_DECLARED_INLINE_P (newdecl
));
2242 /* Don't propagate visibility from the template to the
2243 specialization here. We'll do that in determine_visibility if
2245 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2247 /* [temp.expl.spec/14] We don't inline explicit specialization
2248 just because the primary template says so. */
2250 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2251 the always_inline attribute. */
2252 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2253 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2255 if (DECL_DECLARED_INLINE_P (newdecl
))
2256 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2258 DECL_ATTRIBUTES (newdecl
)
2259 = remove_attribute ("always_inline",
2260 DECL_ATTRIBUTES (newdecl
));
2263 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2265 /* Never inline re-defined extern inline functions.
2266 FIXME: this could be better handled by keeping both
2267 function as separate declarations. */
2268 DECL_UNINLINABLE (newdecl
) = 1;
2272 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2273 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2275 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2277 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2278 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2280 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2281 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2282 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2283 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2286 /* Preserve abstractness on cloned [cd]tors. */
2287 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2289 /* Update newdecl's parms to point at olddecl. */
2290 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2291 parm
= DECL_CHAIN (parm
))
2292 DECL_CONTEXT (parm
) = olddecl
;
2296 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2297 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2298 COPY_DECL_RTL (newdecl
, olddecl
);
2300 if (! types_match
|| new_defines_function
)
2302 /* These need to be copied so that the names are available.
2303 Note that if the types do match, we'll preserve inline
2304 info and other bits, but if not, we won't. */
2305 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2306 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2308 /* If redeclaring a builtin function, it stays built in
2309 if newdecl is a gnu_inline definition, or if newdecl is just
2311 if (DECL_BUILT_IN (olddecl
)
2312 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2314 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2315 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2316 /* If we're keeping the built-in definition, keep the rtl,
2317 regardless of declaration matches. */
2318 COPY_DECL_RTL (olddecl
, newdecl
);
2319 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2321 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2324 /* If a compatible prototype of these builtin functions
2325 is seen, assume the runtime implements it with the
2326 expected semantics. */
2327 case BUILT_IN_STPCPY
:
2328 if (builtin_decl_explicit_p (fncode
))
2329 set_builtin_decl_implicit_p (fncode
, true);
2332 if (builtin_decl_explicit_p (fncode
))
2333 set_builtin_decl_declared_p (fncode
, true);
2338 if (new_defines_function
)
2339 /* If defining a function declared with other language
2340 linkage, use the previously declared language linkage. */
2341 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2342 else if (types_match
)
2344 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2345 /* Don't clear out the arguments if we're just redeclaring a
2347 if (DECL_ARGUMENTS (olddecl
))
2348 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2351 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2352 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2354 /* Now preserve various other info from the definition. */
2355 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2356 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2357 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2358 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2360 /* Warn about conflicting visibility specifications. */
2361 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2362 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2363 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2365 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2366 "%qD: visibility attribute ignored because it "
2367 "conflicts with previous declaration", newdecl
))
2368 inform (DECL_SOURCE_LOCATION (olddecl
),
2369 "previous declaration of %qD", olddecl
);
2371 /* Choose the declaration which specified visibility. */
2372 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2374 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2375 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2377 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2378 so keep this behavior. */
2379 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2381 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2382 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2384 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2385 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2387 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2388 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2390 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2391 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2392 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2394 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2395 with that from NEWDECL below. */
2396 if (DECL_LANG_SPECIFIC (olddecl
))
2398 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2399 != DECL_LANG_SPECIFIC (newdecl
));
2400 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2403 /* Merge the USED information. */
2404 if (TREE_USED (olddecl
))
2405 TREE_USED (newdecl
) = 1;
2406 else if (TREE_USED (newdecl
))
2407 TREE_USED (olddecl
) = 1;
2408 if (VAR_P (newdecl
))
2410 if (DECL_READ_P (olddecl
))
2411 DECL_READ_P (newdecl
) = 1;
2412 else if (DECL_READ_P (newdecl
))
2413 DECL_READ_P (olddecl
) = 1;
2415 if (DECL_PRESERVE_P (olddecl
))
2416 DECL_PRESERVE_P (newdecl
) = 1;
2417 else if (DECL_PRESERVE_P (newdecl
))
2418 DECL_PRESERVE_P (olddecl
) = 1;
2420 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2421 to olddecl and deleted. */
2422 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2423 && DECL_FUNCTION_VERSIONED (olddecl
))
2425 /* Set the flag for newdecl so that it gets copied to olddecl. */
2426 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2427 /* newdecl will be purged after copying to olddecl and is no longer
2429 cgraph_node::delete_function_version (newdecl
);
2432 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2435 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2437 function_size
= sizeof (struct tree_decl_common
);
2439 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2440 (char *) newdecl
+ sizeof (struct tree_common
),
2441 function_size
- sizeof (struct tree_common
));
2443 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2444 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2445 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2447 /* Preserve symtab node mapping. */
2448 olddecl
->decl_with_vis
.symtab_node
= snode
;
2450 if (new_template_info
)
2451 /* If newdecl is a template instantiation, it is possible that
2452 the following sequence of events has occurred:
2454 o A friend function was declared in a class template. The
2455 class template was instantiated.
2457 o The instantiation of the friend declaration was
2458 recorded on the instantiation list, and is newdecl.
2460 o Later, however, instantiate_class_template called pushdecl
2461 on the newdecl to perform name injection. But, pushdecl in
2462 turn called duplicate_decls when it discovered that another
2463 declaration of a global function with the same name already
2466 o Here, in duplicate_decls, we decided to clobber newdecl.
2468 If we're going to do that, we'd better make sure that
2469 olddecl, and not newdecl, is on the list of
2470 instantiations so that if we try to do the instantiation
2471 again we won't get the clobbered declaration. */
2472 reregister_specialization (newdecl
,
2478 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2480 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2481 (char *) newdecl
+ sizeof (struct tree_common
),
2482 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2483 switch (TREE_CODE (newdecl
))
2493 struct symtab_node
*snode
= NULL
;
2495 if (TREE_CODE (newdecl
) == VAR_DECL
2496 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2497 snode
= symtab_node::get (olddecl
);
2498 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2499 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2500 size
- sizeof (struct tree_decl_common
)
2501 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2502 if (TREE_CODE (newdecl
) == VAR_DECL
)
2503 olddecl
->decl_with_vis
.symtab_node
= snode
;
2507 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2508 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2509 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2510 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2515 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2516 || TREE_CODE (newdecl
) == VAR_DECL
)
2518 if (DECL_EXTERNAL (olddecl
)
2519 || TREE_PUBLIC (olddecl
)
2520 || TREE_STATIC (olddecl
))
2522 /* Merge the section attribute.
2523 We want to issue an error if the sections conflict but that must be
2524 done later in decl_attributes since we are called before attributes
2526 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2527 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2529 if (DECL_ONE_ONLY (newdecl
))
2531 struct symtab_node
*oldsym
, *newsym
;
2532 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2533 oldsym
= cgraph_node::get_create (olddecl
);
2535 oldsym
= varpool_node::get_create (olddecl
);
2536 newsym
= symtab_node::get (newdecl
);
2537 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2541 if (TREE_CODE (newdecl
) == VAR_DECL
2542 && DECL_THREAD_LOCAL_P (newdecl
))
2543 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2546 DECL_UID (olddecl
) = olddecl_uid
;
2548 DECL_FRIEND_P (olddecl
) = 1;
2551 DECL_ANTICIPATED (olddecl
) = 1;
2552 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2555 /* NEWDECL contains the merged attribute lists.
2556 Update OLDDECL to be the same. */
2557 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2559 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2560 so that encode_section_info has a chance to look at the new decl
2561 flags and attributes. */
2562 if (DECL_RTL_SET_P (olddecl
)
2563 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2565 && TREE_STATIC (olddecl
))))
2566 make_decl_rtl (olddecl
);
2568 /* The NEWDECL will no longer be needed. Because every out-of-class
2569 declaration of a member results in a call to duplicate_decls,
2570 freeing these nodes represents in a significant savings.
2572 Before releasing the node, be sore to remove function from symbol
2573 table that might have been inserted there to record comdat group.
2574 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2575 structure is shared in between newdecl and oldecl. */
2576 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2577 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2578 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2579 || TREE_CODE (newdecl
) == VAR_DECL
)
2581 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2590 /* Return zero if the declaration NEWDECL is valid
2591 when the declaration OLDDECL (assumed to be for the same name)
2592 has already been seen.
2593 Otherwise return an error message format string with a %s
2594 where the identifier should go. */
2597 redeclaration_error_message (tree newdecl
, tree olddecl
)
2599 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2601 /* Because C++ can put things into name space for free,
2602 constructs like "typedef struct foo { ... } foo"
2603 would look like an erroneous redeclaration. */
2604 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2607 return G_("redefinition of %q#D");
2609 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2611 /* If this is a pure function, its olddecl will actually be
2612 the original initialization to `0' (which we force to call
2613 abort()). Don't complain about redefinition in this case. */
2614 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2615 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2618 /* If both functions come from different namespaces, this is not
2619 a redeclaration - this is a conflict with a used function. */
2620 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2621 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2622 && ! decls_match (olddecl
, newdecl
))
2623 return G_("%qD conflicts with used function");
2625 /* We'll complain about linkage mismatches in
2626 warn_extern_redeclared_static. */
2628 /* Defining the same name twice is no good. */
2629 if (DECL_INITIAL (olddecl
) != NULL_TREE
2630 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2632 if (DECL_NAME (olddecl
) == NULL_TREE
)
2633 return G_("%q#D not declared in class");
2634 else if (!GNU_INLINE_P (olddecl
)
2635 || GNU_INLINE_P (newdecl
))
2636 return G_("redefinition of %q#D");
2639 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2641 bool olda
= GNU_INLINE_P (olddecl
);
2642 bool newa
= GNU_INLINE_P (newdecl
);
2647 return G_("%q+D redeclared inline with "
2648 "%<gnu_inline%> attribute");
2650 return G_("%q+D redeclared inline without "
2651 "%<gnu_inline%> attribute");
2655 check_abi_tag_redeclaration
2656 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2657 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2661 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2665 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2667 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2668 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2669 return G_("redefinition of %q#D");
2673 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2674 || (DECL_TEMPLATE_RESULT (newdecl
)
2675 == DECL_TEMPLATE_RESULT (olddecl
)))
2678 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2679 if (DECL_TEMPLATE_INFO (nt
))
2680 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2681 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2682 if (DECL_TEMPLATE_INFO (ot
))
2683 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2684 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2685 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2686 return G_("redefinition of %q#D");
2688 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2690 bool olda
= GNU_INLINE_P (ot
);
2691 bool newa
= GNU_INLINE_P (nt
);
2696 return G_("%q+D redeclared inline with "
2697 "%<gnu_inline%> attribute");
2699 return G_("%q+D redeclared inline without "
2700 "%<gnu_inline%> attribute");
2704 /* Core issue #226 (C++0x):
2706 If a friend function template declaration specifies a
2707 default template-argument, that declaration shall be a
2708 definition and shall be the only declaration of the
2709 function template in the translation unit. */
2710 if ((cxx_dialect
!= cxx98
)
2711 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2712 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2713 /*is_primary=*/true,
2714 /*is_partial=*/false,
2715 /*is_friend_decl=*/2))
2716 return G_("redeclaration of friend %q#D "
2717 "may not have default template arguments");
2721 else if (VAR_P (newdecl
)
2722 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2723 && (! DECL_LANG_SPECIFIC (olddecl
)
2724 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2725 || DECL_THREAD_LOCAL_P (newdecl
)))
2727 /* Only variables can be thread-local, and all declarations must
2728 agree on this property. */
2729 if (DECL_THREAD_LOCAL_P (newdecl
))
2730 return G_("thread-local declaration of %q#D follows "
2731 "non-thread-local declaration");
2733 return G_("non-thread-local declaration of %q#D follows "
2734 "thread-local declaration");
2736 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2738 /* The objects have been declared at namespace scope. If either
2739 is a member of an anonymous union, then this is an invalid
2740 redeclaration. For example:
2746 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2747 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2748 return G_("redeclaration of %q#D");
2749 /* If at least one declaration is a reference, there is no
2750 conflict. For example:
2756 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2758 /* Reject two definitions. */
2759 return G_("redefinition of %q#D");
2763 /* Objects declared with block scope: */
2764 /* Reject two definitions, and reject a definition
2765 together with an external reference. */
2766 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2767 return G_("redeclaration of %q#D");
2772 /* Hash and equality functions for the named_label table. */
2775 named_label_hasher::hash (named_label_entry
*ent
)
2777 return DECL_UID (ent
->label_decl
);
2781 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2783 return a
->label_decl
== b
->label_decl
;
2786 /* Create a new label, named ID. */
2789 make_label_decl (tree id
, int local_p
)
2791 struct named_label_entry
*ent
;
2794 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2796 DECL_CONTEXT (decl
) = current_function_decl
;
2797 DECL_MODE (decl
) = VOIDmode
;
2798 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2800 /* Say where one reference is to the label, for the sake of the
2801 error if it is not defined. */
2802 DECL_SOURCE_LOCATION (decl
) = input_location
;
2804 /* Record the fact that this identifier is bound to this label. */
2805 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2807 /* Create the label htab for the function on demand. */
2809 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2811 /* Record this label on the list of labels used in this function.
2812 We do this before calling make_label_decl so that we get the
2813 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2814 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2815 ent
->label_decl
= decl
;
2817 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2818 gcc_assert (*slot
== NULL
);
2824 /* Look for a label named ID in the current function. If one cannot
2825 be found, create one. (We keep track of used, but undefined,
2826 labels, and complain about them at the end of a function.) */
2829 lookup_label_1 (tree id
)
2833 /* You can't use labels at global scope. */
2834 if (current_function_decl
== NULL_TREE
)
2836 error ("label %qE referenced outside of any function", id
);
2840 /* See if we've already got this label. */
2841 decl
= IDENTIFIER_LABEL_VALUE (id
);
2842 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2845 decl
= make_label_decl (id
, /*local_p=*/0);
2849 /* Wrapper for lookup_label_1. */
2852 lookup_label (tree id
)
2855 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2856 ret
= lookup_label_1 (id
);
2857 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2861 /* Declare a local label named ID. */
2864 declare_local_label (tree id
)
2867 cp_label_binding bind
;
2869 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2870 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2871 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2873 decl
= make_label_decl (id
, /*local_p=*/1);
2875 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2880 /* Returns nonzero if it is ill-formed to jump past the declaration of
2881 DECL. Returns 2 if it's also a real problem. */
2884 decl_jump_unsafe (tree decl
)
2886 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2887 with automatic storage duration is not in scope to a point where it is
2888 in scope is ill-formed unless the variable has scalar type, class type
2889 with a trivial default constructor and a trivial destructor, a
2890 cv-qualified version of one of these types, or an array of one of the
2891 preceding types and is declared without an initializer (8.5). */
2892 tree type
= TREE_TYPE (decl
);
2894 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2895 || type
== error_mark_node
)
2898 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2899 || variably_modified_type_p (type
, NULL_TREE
))
2902 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2908 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2911 identify_goto (tree decl
, const location_t
*locus
)
2913 bool complained
= (decl
2914 ? permerror (input_location
, "jump to label %qD", decl
)
2915 : permerror (input_location
, "jump to case label"));
2916 if (complained
&& locus
)
2917 inform (*locus
, " from here");
2921 /* Check that a single previously seen jump to a newly defined label
2922 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2923 the jump context; NAMES are the names in scope in LEVEL at the jump
2924 context; LOCUS is the source position of the jump or 0. Returns
2925 true if all is well. */
2928 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2929 bool exited_omp
, const location_t
*locus
)
2931 cp_binding_level
*b
;
2932 bool identified
= false, complained
= false;
2933 bool saw_eh
= false, saw_omp
= false;
2937 complained
= identify_goto (decl
, locus
);
2939 inform (input_location
, " exits OpenMP structured block");
2940 identified
= saw_omp
= true;
2943 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2945 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2947 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2948 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2949 : TREE_CHAIN (new_decls
)))
2951 int problem
= decl_jump_unsafe (new_decls
);
2957 complained
= identify_goto (decl
, locus
);
2963 inform (input_location
,
2964 " crosses initialization of %q+#D", new_decls
);
2966 inform (input_location
, " enters scope of %q+#D which has "
2967 "non-trivial destructor", new_decls
);
2973 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2977 complained
= identify_goto (decl
, locus
);
2982 if (b
->kind
== sk_try
)
2983 inform (input_location
, " enters try block");
2985 inform (input_location
, " enters catch block");
2989 if (b
->kind
== sk_omp
&& !saw_omp
)
2993 complained
= identify_goto (decl
, locus
);
2997 inform (input_location
, " enters OpenMP structured block");
3006 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
3008 check_previous_goto_1 (decl
, use
->binding_level
,
3009 use
->names_in_scope
, use
->in_omp_scope
,
3010 &use
->o_goto_locus
);
3014 check_switch_goto (cp_binding_level
* level
)
3016 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3019 /* Check that a new jump to a label DECL is OK. Called by
3020 finish_goto_stmt. */
3023 check_goto (tree decl
)
3025 struct named_label_entry
*ent
, dummy
;
3026 bool saw_catch
= false, identified
= false, complained
= false;
3030 /* We can't know where a computed goto is jumping.
3031 So we assume that it's OK. */
3032 if (TREE_CODE (decl
) != LABEL_DECL
)
3035 /* We didn't record any information about this label when we created it,
3036 and there's not much point since it's trivial to analyze as a return. */
3037 if (decl
== cdtor_label
)
3040 dummy
.label_decl
= decl
;
3041 ent
= named_labels
->find (&dummy
);
3042 gcc_assert (ent
!= NULL
);
3044 /* If the label hasn't been defined yet, defer checking. */
3045 if (! DECL_INITIAL (decl
))
3047 struct named_label_use_entry
*new_use
;
3049 /* Don't bother creating another use if the last goto had the
3050 same data, and will therefore create the same set of errors. */
3052 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3055 new_use
= ggc_alloc
<named_label_use_entry
> ();
3056 new_use
->binding_level
= current_binding_level
;
3057 new_use
->names_in_scope
= current_binding_level
->names
;
3058 new_use
->o_goto_locus
= input_location
;
3059 new_use
->in_omp_scope
= false;
3061 new_use
->next
= ent
->uses
;
3062 ent
->uses
= new_use
;
3066 if (ent
->in_try_scope
|| ent
->in_catch_scope
3067 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3069 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3071 inform (input_location
, " from here");
3075 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3077 int u
= decl_jump_unsafe (bad
);
3079 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3081 /* Can't skip init of __exception_info. */
3083 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3086 else if (complained
)
3089 inform (input_location
, " skips initialization of %q+#D", bad
);
3091 inform (input_location
, " enters scope of %q+#D which has "
3092 "non-trivial destructor", bad
);
3098 if (ent
->in_try_scope
)
3099 inform (input_location
, " enters try block");
3100 else if (ent
->in_catch_scope
&& !saw_catch
)
3101 inform (input_location
, " enters catch block");
3104 if (ent
->in_omp_scope
)
3107 inform (input_location
, " enters OpenMP structured block");
3109 else if (flag_openmp
)
3111 cp_binding_level
*b
;
3112 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3114 if (b
== ent
->binding_level
)
3116 if (b
->kind
== sk_omp
)
3120 complained
= permerror (input_location
,
3121 "jump to label %q+D", decl
);
3123 inform (input_location
, " from here");
3127 inform (input_location
, " exits OpenMP structured block");
3134 /* Check that a return is ok wrt OpenMP structured blocks.
3135 Called by finish_return_stmt. Returns true if all is well. */
3138 check_omp_return (void)
3140 cp_binding_level
*b
;
3141 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3142 if (b
->kind
== sk_omp
)
3144 error ("invalid exit from OpenMP structured block");
3147 else if (b
->kind
== sk_function_parms
)
3152 /* Define a label, specifying the location in the source file.
3153 Return the LABEL_DECL node for the label. */
3156 define_label_1 (location_t location
, tree name
)
3158 struct named_label_entry
*ent
, dummy
;
3159 cp_binding_level
*p
;
3162 decl
= lookup_label (name
);
3164 dummy
.label_decl
= decl
;
3165 ent
= named_labels
->find (&dummy
);
3166 gcc_assert (ent
!= NULL
);
3168 /* After labels, make any new cleanups in the function go into their
3169 own new (temporary) binding contour. */
3170 for (p
= current_binding_level
;
3171 p
->kind
!= sk_function_parms
;
3173 p
->more_cleanups_ok
= 0;
3175 if (name
== get_identifier ("wchar_t"))
3176 permerror (input_location
, "label named wchar_t");
3178 if (DECL_INITIAL (decl
) != NULL_TREE
)
3180 error ("duplicate label %qD", decl
);
3181 return error_mark_node
;
3185 struct named_label_use_entry
*use
;
3187 /* Mark label as having been defined. */
3188 DECL_INITIAL (decl
) = error_mark_node
;
3189 /* Say where in the source. */
3190 DECL_SOURCE_LOCATION (decl
) = location
;
3192 ent
->binding_level
= current_binding_level
;
3193 ent
->names_in_scope
= current_binding_level
->names
;
3195 for (use
= ent
->uses
; use
; use
= use
->next
)
3196 check_previous_goto (decl
, use
);
3203 /* Wrapper for define_label_1. */
3206 define_label (location_t location
, tree name
)
3209 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3210 ret
= define_label_1 (location
, name
);
3211 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3218 cp_binding_level
*level
;
3219 struct cp_switch
*next
;
3220 /* The SWITCH_STMT being built. */
3222 /* A splay-tree mapping the low element of a case range to the high
3223 element, or NULL_TREE if there is no high element. Used to
3224 determine whether or not a new case label duplicates an old case
3225 label. We need a tree, rather than simply a hash table, because
3226 of the GNU case range extension. */
3230 /* A stack of the currently active switch statements. The innermost
3231 switch statement is on the top of the stack. There is no need to
3232 mark the stack for garbage collection because it is only active
3233 during the processing of the body of a function, and we never
3234 collect at that point. */
3236 static struct cp_switch
*switch_stack
;
3238 /* Called right after a switch-statement condition is parsed.
3239 SWITCH_STMT is the switch statement being parsed. */
3242 push_switch (tree switch_stmt
)
3244 struct cp_switch
*p
= XNEW (struct cp_switch
);
3245 p
->level
= current_binding_level
;
3246 p
->next
= switch_stack
;
3247 p
->switch_stmt
= switch_stmt
;
3248 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3255 struct cp_switch
*cs
= switch_stack
;
3256 location_t switch_location
;
3258 /* Emit warnings as needed. */
3259 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3260 if (!processing_template_decl
)
3261 c_do_switch_warnings (cs
->cases
, switch_location
,
3262 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3263 SWITCH_STMT_COND (cs
->switch_stmt
));
3265 splay_tree_delete (cs
->cases
);
3266 switch_stack
= switch_stack
->next
;
3270 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3271 condition. Note that if TYPE and VALUE are already integral we don't
3272 really do the conversion because the language-independent
3273 warning/optimization code will work better that way. */
3276 case_conversion (tree type
, tree value
)
3278 if (value
== NULL_TREE
)
3281 if (cxx_dialect
>= cxx11
3282 && (SCOPED_ENUM_P (type
)
3283 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3285 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3286 type
= type_promotes_to (type
);
3287 value
= (perform_implicit_conversion_flags
3288 (type
, value
, tf_warning_or_error
,
3289 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3291 return cxx_constant_value (value
);
3294 /* Note that we've seen a definition of a case label, and complain if this
3295 is a bad place for one. */
3298 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3301 cp_binding_level
*p
;
3304 if (processing_template_decl
)
3308 /* For templates, just add the case label; we'll do semantic
3309 analysis at instantiation-time. */
3310 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3311 return add_stmt (build_case_label (low_value
, high_value
, label
));
3314 /* Find the condition on which this switch statement depends. */
3315 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3316 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3317 cond
= TREE_VALUE (cond
);
3319 if (!check_switch_goto (switch_stack
->level
))
3320 return error_mark_node
;
3322 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3324 low_value
= case_conversion (type
, low_value
);
3325 high_value
= case_conversion (type
, high_value
);
3327 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3328 low_value
, high_value
);
3330 /* After labels, make any new cleanups in the function go into their
3331 own new (temporary) binding contour. */
3332 for (p
= current_binding_level
;
3333 p
->kind
!= sk_function_parms
;
3335 p
->more_cleanups_ok
= 0;
3340 struct typename_info
{
3348 struct typename_hasher
: ggc_hasher
<tree
>
3350 typedef typename_info
*compare_type
;
3352 /* Hash a TYPENAME_TYPE. */
3359 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3360 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3365 /* Compare two TYPENAME_TYPEs. */
3368 equal (tree t1
, const typename_info
*t2
)
3370 return (TYPE_IDENTIFIER (t1
) == t2
->name
3371 && TYPE_CONTEXT (t1
) == t2
->scope
3372 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3373 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3374 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3378 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3379 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3381 Returns the new TYPENAME_TYPE. */
3383 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3386 build_typename_type (tree context
, tree name
, tree fullname
,
3387 enum tag_types tag_type
)
3395 if (typename_htab
== NULL
)
3396 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3398 ti
.scope
= FROB_CONTEXT (context
);
3400 ti
.template_id
= fullname
;
3401 ti
.enum_p
= tag_type
== enum_type
;
3402 ti
.class_p
= (tag_type
== class_type
3403 || tag_type
== record_type
3404 || tag_type
== union_type
);
3405 hash
= (htab_hash_pointer (ti
.scope
)
3406 ^ htab_hash_pointer (ti
.name
));
3408 /* See if we already have this type. */
3409 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3414 /* Build the TYPENAME_TYPE. */
3415 t
= cxx_make_type (TYPENAME_TYPE
);
3416 TYPE_CONTEXT (t
) = ti
.scope
;
3417 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3418 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3419 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3421 /* Build the corresponding TYPE_DECL. */
3422 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3423 TYPE_NAME (TREE_TYPE (d
)) = d
;
3424 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3425 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3426 DECL_ARTIFICIAL (d
) = 1;
3428 /* Store it in the hash table. */
3431 /* TYPENAME_TYPEs must always be compared structurally, because
3432 they may or may not resolve down to another type depending on
3433 the currently open classes. */
3434 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3440 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3441 provided to name the type. Returns an appropriate type, unless an
3442 error occurs, in which case error_mark_node is returned. If we
3443 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3444 return that, rather than the _TYPE it corresponds to, in other
3445 cases we look through the type decl. If TF_ERROR is set, complain
3446 about errors, otherwise be quiet. */
3449 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3450 tsubst_flags_t complain
)
3456 if (name
== error_mark_node
3457 || context
== NULL_TREE
3458 || context
== error_mark_node
)
3459 return error_mark_node
;
3463 if (!(TYPE_LANG_SPECIFIC (name
)
3464 && (CLASSTYPE_IS_TEMPLATE (name
)
3465 || CLASSTYPE_USE_TEMPLATE (name
))))
3466 name
= TYPE_IDENTIFIER (name
);
3468 /* Create a TEMPLATE_ID_EXPR for the type. */
3469 name
= build_nt (TEMPLATE_ID_EXPR
,
3470 CLASSTYPE_TI_TEMPLATE (name
),
3471 CLASSTYPE_TI_ARGS (name
));
3473 else if (TREE_CODE (name
) == TYPE_DECL
)
3474 name
= DECL_NAME (name
);
3478 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3480 name
= TREE_OPERAND (name
, 0);
3481 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3482 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3483 else if (TREE_CODE (name
) == OVERLOAD
)
3485 if (complain
& tf_error
)
3486 error ("%qD is not a type", name
);
3487 return error_mark_node
;
3490 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3492 if (complain
& tf_error
)
3493 error ("%qD used without template parameters", name
);
3494 return error_mark_node
;
3496 gcc_assert (identifier_p (name
));
3497 gcc_assert (TYPE_P (context
));
3499 if (!MAYBE_CLASS_TYPE_P (context
))
3501 if (complain
& tf_error
)
3502 error ("%q#T is not a class", context
);
3503 return error_mark_node
;
3506 /* When the CONTEXT is a dependent type, NAME could refer to a
3507 dependent base class of CONTEXT. But look inside it anyway
3508 if CONTEXT is a currently open scope, in case it refers to a
3509 member of the current instantiation or a non-dependent base;
3510 lookup will stop when we hit a dependent base. */
3511 if (!dependent_scope_p (context
))
3512 /* We should only set WANT_TYPE when we're a nested typename type.
3513 Then we can give better diagnostics if we find a non-type. */
3514 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3518 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3519 return build_typename_type (context
, name
, fullname
, tag_type
);
3521 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3525 if (complain
& tf_error
)
3526 error (want_template
? G_("no class template named %q#T in %q#T")
3527 : G_("no type named %q#T in %q#T"), name
, context
);
3528 return error_mark_node
;
3531 /* Pull out the template from an injected-class-name (or multiple). */
3533 t
= maybe_get_template_decl_from_type_decl (t
);
3535 if (TREE_CODE (t
) == TREE_LIST
)
3537 if (complain
& tf_error
)
3539 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3540 print_candidates (t
);
3542 return error_mark_node
;
3545 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3547 if (complain
& tf_error
)
3548 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3550 return error_mark_node
;
3552 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3554 if (complain
& tf_error
)
3555 error ("%<typename %T::%D%> names %q#T, which is not a type",
3557 return error_mark_node
;
3560 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3561 return error_mark_node
;
3563 /* If we are currently parsing a template and if T is a typedef accessed
3564 through CONTEXT then we need to remember and check access of T at
3565 template instantiation time. */
3566 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3569 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3571 /*entering_scope=*/0,
3572 tf_warning_or_error
| tf_user
);
3574 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3577 maybe_record_typedef_use (t
);
3582 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3583 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3584 in which case error_mark_node is returned.
3586 If PARM_LIST is non-NULL, also make sure that the template parameter
3587 list of TEMPLATE_DECL matches.
3589 If COMPLAIN zero, don't complain about any errors that occur. */
3592 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3593 tsubst_flags_t complain
)
3599 name
= TYPE_IDENTIFIER (name
);
3600 else if (DECL_P (name
))
3601 name
= DECL_NAME (name
);
3602 gcc_assert (identifier_p (name
));
3604 if (!dependent_type_p (context
)
3605 || currently_open_class (context
))
3607 tree tmpl
= NULL_TREE
;
3609 if (MAYBE_CLASS_TYPE_P (context
))
3610 tmpl
= lookup_field (context
, name
, 0, false);
3612 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3613 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3615 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3617 if (complain
& tf_error
)
3618 error ("no class template named %q#T in %q#T", name
, context
);
3619 return error_mark_node
;
3623 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3625 if (complain
& tf_error
)
3627 error ("template parameters do not match template %qD", tmpl
);
3628 inform (DECL_SOURCE_LOCATION (tmpl
),
3629 "%qD declared here", tmpl
);
3631 return error_mark_node
;
3634 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3636 return error_mark_node
;
3641 /* Build the UNBOUND_CLASS_TEMPLATE. */
3642 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3643 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3644 TREE_TYPE (t
) = NULL_TREE
;
3645 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3647 /* Build the corresponding TEMPLATE_DECL. */
3648 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3649 TYPE_NAME (TREE_TYPE (d
)) = d
;
3650 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3651 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3652 DECL_ARTIFICIAL (d
) = 1;
3653 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3660 /* Push the declarations of builtin types into the namespace.
3661 RID_INDEX is the index of the builtin type in the array
3662 RID_POINTERS. NAME is the name used when looking up the builtin
3663 type. TYPE is the _TYPE node for the builtin type. */
3666 record_builtin_type (enum rid rid_index
,
3670 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3671 tree tdecl
= NULL_TREE
;
3673 if ((int) rid_index
< (int) RID_MAX
)
3674 rname
= ridpointers
[(int) rid_index
];
3676 tname
= get_identifier (name
);
3678 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3679 eliminated. Built-in types should not be looked up name; their
3680 names are keywords that the parser can recognize. However, there
3681 is code in c-common.c that uses identifier_global_value to look
3682 up built-in types by name. */
3685 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3686 DECL_ARTIFICIAL (tdecl
) = 1;
3687 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3693 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3694 DECL_ARTIFICIAL (tdecl
) = 1;
3696 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3699 if (!TYPE_NAME (type
))
3700 TYPE_NAME (type
) = tdecl
;
3703 debug_hooks
->type_decl (tdecl
, 0);
3706 /* Record one of the standard Java types.
3707 * Declare it as having the given NAME.
3708 * If SIZE > 0, it is the size of one of the integral types;
3709 * otherwise it is the negative of the size of one of the other types. */
3712 record_builtin_java_type (const char* name
, int size
)
3717 type
= build_nonstandard_integer_type (size
, 0);
3718 type
= build_distinct_type_copy (type
);
3720 else if (size
> -32)
3723 /* "__java_char" or ""__java_boolean". */
3724 type
= build_nonstandard_integer_type (-size
, 1);
3725 type
= build_distinct_type_copy (type
);
3726 /* Get the signed type cached and attached to the unsigned type,
3727 so it doesn't get garbage-collected at "random" times,
3728 causing potential codegen differences out of different UIDs
3729 and different alias set numbers. */
3730 stype
= build_nonstandard_integer_type (-size
, 0);
3731 stype
= build_distinct_type_copy (stype
);
3732 TREE_CHAIN (type
) = stype
;
3733 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3736 { /* "__java_float" or ""__java_double". */
3737 type
= make_node (REAL_TYPE
);
3738 TYPE_PRECISION (type
) = - size
;
3741 record_builtin_type (RID_MAX
, name
, type
);
3742 decl
= TYPE_NAME (type
);
3744 /* Suppress generate debug symbol entries for these types,
3745 since for normal C++ they are just clutter.
3746 However, push_lang_context undoes this if extern "Java" is seen. */
3747 DECL_IGNORED_P (decl
) = 1;
3749 TYPE_FOR_JAVA (type
) = 1;
3753 /* Push a type into the namespace so that the back ends ignore it. */
3756 record_unknown_type (tree type
, const char* name
)
3758 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3759 TYPE_DECL
, get_identifier (name
), type
));
3760 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3761 DECL_IGNORED_P (decl
) = 1;
3762 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3763 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3764 TYPE_ALIGN (type
) = 1;
3765 TYPE_USER_ALIGN (type
) = 0;
3766 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3769 /* A string for which we should create an IDENTIFIER_NODE at
3772 typedef struct predefined_identifier
3774 /* The name of the identifier. */
3775 const char *const name
;
3776 /* The place where the IDENTIFIER_NODE should be stored. */
3778 /* Nonzero if this is the name of a constructor or destructor. */
3779 const int ctor_or_dtor_p
;
3780 } predefined_identifier
;
3782 /* Create all the predefined identifiers. */
3785 initialize_predefined_identifiers (void)
3787 const predefined_identifier
*pid
;
3789 /* A table of identifiers to create at startup. */
3790 static const predefined_identifier predefined_identifiers
[] = {
3791 { "C++", &lang_name_cplusplus
, 0 },
3792 { "C", &lang_name_c
, 0 },
3793 { "Java", &lang_name_java
, 0 },
3794 /* Some of these names have a trailing space so that it is
3795 impossible for them to conflict with names written by users. */
3796 { "__ct ", &ctor_identifier
, 1 },
3797 { "__base_ctor ", &base_ctor_identifier
, 1 },
3798 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3799 { "__dt ", &dtor_identifier
, 1 },
3800 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3801 { "__base_dtor ", &base_dtor_identifier
, 1 },
3802 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3803 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3804 { "nelts", &nelts_identifier
, 0 },
3805 { THIS_NAME
, &this_identifier
, 0 },
3806 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3807 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3808 { "_vptr", &vptr_identifier
, 0 },
3809 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3810 { "::", &global_scope_name
, 0 },
3811 { "std", &std_identifier
, 0 },
3815 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3817 *pid
->node
= get_identifier (pid
->name
);
3818 if (pid
->ctor_or_dtor_p
)
3819 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3823 /* Create the predefined scalar types of C,
3824 and some nodes representing standard constants (0, 1, (void *)0).
3825 Initialize the global binding level.
3826 Make definitions for built-in primitive functions. */
3829 cxx_init_decl_processing (void)
3832 tree void_ftype_ptr
;
3834 /* Create all the identifiers we need. */
3835 initialize_predefined_identifiers ();
3837 /* Create the global variables. */
3838 push_to_top_level ();
3840 current_function_decl
= NULL_TREE
;
3841 current_binding_level
= NULL
;
3842 /* Enter the global namespace. */
3843 gcc_assert (global_namespace
== NULL_TREE
);
3844 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3846 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3847 TREE_PUBLIC (global_namespace
) = 1;
3848 begin_scope (sk_namespace
, global_namespace
);
3850 if (flag_visibility_ms_compat
)
3851 default_visibility
= VISIBILITY_HIDDEN
;
3854 current_lang_name
= lang_name_c
;
3856 /* Create the `std' namespace. */
3857 push_namespace (std_identifier
);
3858 std_node
= current_namespace
;
3861 c_common_nodes_and_builtins ();
3863 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3864 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3865 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3866 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3867 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3868 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3869 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3870 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3872 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3874 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3875 truthvalue_type_node
= boolean_type_node
;
3876 truthvalue_false_node
= boolean_false_node
;
3877 truthvalue_true_node
= boolean_true_node
;
3879 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3880 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3881 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3884 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3887 delta_type_node
= ptrdiff_type_node
;
3888 vtable_index_type
= ptrdiff_type_node
;
3890 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3891 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3892 void_ftype_ptr
= build_function_type_list (void_type_node
,
3893 ptr_type_node
, NULL_TREE
);
3895 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3897 /* C++ extensions */
3899 unknown_type_node
= make_node (LANG_TYPE
);
3900 record_unknown_type (unknown_type_node
, "unknown type");
3902 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3903 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3905 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3907 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3908 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3910 init_list_type_node
= make_node (LANG_TYPE
);
3911 record_unknown_type (init_list_type_node
, "init list");
3914 /* Make sure we get a unique function type, so we can give
3915 its pointer type a name. (This wins for gdb.) */
3916 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3917 TREE_TYPE (vfunc_type
) = integer_type_node
;
3918 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3919 layout_type (vfunc_type
);
3921 vtable_entry_type
= build_pointer_type (vfunc_type
);
3923 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3926 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3927 layout_type (vtbl_type_node
);
3928 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3929 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3930 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3931 layout_type (vtbl_ptr_type_node
);
3932 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3934 push_namespace (get_identifier ("__cxxabiv1"));
3935 abi_node
= current_namespace
;
3938 global_type_node
= make_node (LANG_TYPE
);
3939 record_unknown_type (global_type_node
, "global type");
3942 current_lang_name
= lang_name_cplusplus
;
3945 tree newattrs
, extvisattr
;
3946 tree newtype
, deltype
;
3947 tree ptr_ftype_sizetype
;
3951 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3952 if (cxx_dialect
== cxx98
)
3955 tree bad_alloc_type_node
;
3956 tree bad_alloc_decl
;
3958 push_namespace (std_identifier
);
3959 bad_alloc_id
= get_identifier ("bad_alloc");
3960 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3961 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3963 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3964 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3968 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3971 new_eh_spec
= noexcept_false_spec
;
3973 /* Ensure attribs.c is initialized. */
3975 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3977 newattrs
= tree_cons (get_identifier ("alloc_size"),
3978 build_tree_list (NULL_TREE
, integer_one_node
),
3980 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3981 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3982 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3983 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3984 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3985 DECL_IS_MALLOC (opnew
) = 1;
3986 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3987 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3988 DECL_IS_MALLOC (opnew
) = 1;
3989 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3990 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3991 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3992 if (flag_sized_deallocation
)
3994 /* Also push the sized deallocation variants:
3995 void operator delete(void*, std::size_t) throw();
3996 void operator delete[](void*, std::size_t) throw(); */
3997 tree void_ftype_ptr_size
3998 = build_function_type_list (void_type_node
, ptr_type_node
,
3999 size_type_node
, NULL_TREE
);
4000 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4002 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4003 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4004 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4007 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4008 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4009 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4010 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4011 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4012 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4013 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4014 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4018 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4019 ECF_NORETURN
| ECF_NOTHROW
);
4021 /* Perform other language dependent initializations. */
4022 init_class_processing ();
4023 init_rtti_processing ();
4024 init_template_processing ();
4026 if (flag_exceptions
)
4027 init_exception_processing ();
4029 if (! supports_one_only ())
4032 make_fname_decl
= cp_make_fname_decl
;
4033 start_fname_decls ();
4035 /* Show we use EH for cleanups. */
4036 if (flag_exceptions
)
4037 using_eh_for_cleanups ();
4040 /* Generate an initializer for a function naming variable from
4041 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4042 filled in with the type of the init. */
4045 cp_fname_init (const char* name
, tree
*type_p
)
4047 tree domain
= NULL_TREE
;
4049 tree init
= NULL_TREE
;
4054 length
= strlen (name
);
4055 domain
= build_index_type (size_int (length
));
4056 init
= build_string (length
+ 1, name
);
4059 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4060 type
= build_cplus_array_type (type
, domain
);
4065 TREE_TYPE (init
) = type
;
4067 init
= error_mark_node
;
4072 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4073 the decl, LOC is the location to give the decl, NAME is the
4074 initialization string and TYPE_DEP indicates whether NAME depended
4075 on the type of the function. We make use of that to detect
4076 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4077 at the point of first use, so we mustn't push the decl now. */
4080 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4082 const char *const name
= (type_dep
&& processing_template_decl
4083 ? NULL
: fname_as_string (type_dep
));
4085 tree init
= cp_fname_init (name
, &type
);
4086 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4089 free (CONST_CAST (char *, name
));
4091 /* As we're using pushdecl_with_scope, we must set the context. */
4092 DECL_CONTEXT (decl
) = current_function_decl
;
4094 TREE_STATIC (decl
) = 1;
4095 TREE_READONLY (decl
) = 1;
4096 DECL_ARTIFICIAL (decl
) = 1;
4098 TREE_USED (decl
) = 1;
4100 if (current_function_decl
)
4102 cp_binding_level
*b
= current_binding_level
;
4103 if (b
->kind
== sk_function_parms
)
4104 return error_mark_node
;
4105 while (b
->level_chain
->kind
!= sk_function_parms
)
4107 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4108 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4109 LOOKUP_ONLYCONVERTING
);
4113 DECL_THIS_STATIC (decl
) = true;
4114 pushdecl_top_level_and_finish (decl
, init
);
4121 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4123 tree id
= DECL_NAME (decl
);
4124 const char *name
= IDENTIFIER_POINTER (id
);
4126 retrofit_lang_decl (decl
);
4128 DECL_ARTIFICIAL (decl
) = 1;
4129 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4130 SET_DECL_LANGUAGE (decl
, lang_c
);
4131 /* Runtime library routines are, by definition, available in an
4132 external shared object. */
4133 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4134 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4136 DECL_CONTEXT (decl
) = context
;
4139 pushdecl_top_level (decl
);
4143 /* A function in the user's namespace should have an explicit
4144 declaration before it is used. Mark the built-in function as
4145 anticipated but not actually declared. */
4146 if (name
[0] != '_' || name
[1] != '_')
4147 DECL_ANTICIPATED (decl
) = 1;
4148 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4150 size_t len
= strlen (name
);
4152 /* Treat __*_chk fortification functions as anticipated as well,
4153 unless they are __builtin_*. */
4154 if (len
> strlen ("___chk")
4155 && memcmp (name
+ len
- strlen ("_chk"),
4156 "_chk", strlen ("_chk") + 1) == 0)
4157 DECL_ANTICIPATED (decl
) = 1;
4164 cxx_builtin_function (tree decl
)
4166 tree id
= DECL_NAME (decl
);
4167 const char *name
= IDENTIFIER_POINTER (id
);
4168 /* All builtins that don't begin with an '_' should additionally
4169 go in the 'std' namespace. */
4172 tree decl2
= copy_node(decl
);
4173 push_namespace (std_identifier
);
4174 builtin_function_1 (decl2
, std_node
, false);
4178 return builtin_function_1 (decl
, NULL_TREE
, false);
4181 /* Like cxx_builtin_function, but guarantee the function is added to the global
4182 scope. This is to allow function specific options to add new machine
4183 dependent builtins when the target ISA changes via attribute((target(...)))
4184 which saves space on program startup if the program does not use non-generic
4188 cxx_builtin_function_ext_scope (tree decl
)
4191 tree id
= DECL_NAME (decl
);
4192 const char *name
= IDENTIFIER_POINTER (id
);
4193 /* All builtins that don't begin with an '_' should additionally
4194 go in the 'std' namespace. */
4197 tree decl2
= copy_node(decl
);
4198 push_namespace (std_identifier
);
4199 builtin_function_1 (decl2
, std_node
, true);
4203 return builtin_function_1 (decl
, NULL_TREE
, true);
4206 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4207 function. Not called directly. */
4210 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4213 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4214 DECL_EXTERNAL (fn
) = 1;
4215 TREE_PUBLIC (fn
) = 1;
4216 DECL_ARTIFICIAL (fn
) = 1;
4217 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4218 SET_DECL_LANGUAGE (fn
, lang_c
);
4219 /* Runtime library routines are, by definition, available in an
4220 external shared object. */
4221 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4222 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4223 set_call_expr_flags (fn
, ecf_flags
);
4227 /* Returns the _DECL for a library function with C++ linkage. */
4230 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4233 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4234 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4235 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4239 /* Like build_library_fn, but takes a C string instead of an
4243 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4245 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4248 /* Like build_cp_library_fn, but takes a C string instead of an
4252 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4254 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4258 /* Like build_library_fn, but also pushes the function so that we will
4259 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4260 may throw exceptions listed in RAISES. */
4263 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4268 type
= build_exception_variant (type
, raises
);
4270 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4271 pushdecl_top_level (fn
);
4275 /* Like build_cp_library_fn, but also pushes the function so that it
4276 will be found by normal lookup. */
4279 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4282 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4287 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4291 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4295 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4297 tree type
= build_function_type (void_type_node
, parmtypes
);
4298 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4301 /* Like push_library_fn, but also note that this function throws
4302 and does not return. Used for __throw_foo and the like. */
4305 push_throw_library_fn (tree name
, tree type
)
4307 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4311 /* When we call finish_struct for an anonymous union, we create
4312 default copy constructors and such. But, an anonymous union
4313 shouldn't have such things; this function undoes the damage to the
4314 anonymous union type T.
4316 (The reason that we create the synthesized methods is that we don't
4317 distinguish `union { int i; }' from `typedef union { int i; } U'.
4318 The first is an anonymous union; the second is just an ordinary
4322 fixup_anonymous_aggr (tree t
)
4326 /* Wipe out memory of synthesized methods. */
4327 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4328 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4329 TYPE_HAS_COPY_CTOR (t
) = 0;
4330 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4331 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4332 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4334 /* Splice the implicitly generated functions out of the TYPE_METHODS
4336 q
= &TYPE_METHODS (t
);
4339 if (DECL_ARTIFICIAL (*q
))
4340 *q
= TREE_CHAIN (*q
);
4342 q
= &DECL_CHAIN (*q
);
4345 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4346 if (TYPE_METHODS (t
))
4348 tree decl
= TYPE_MAIN_DECL (t
);
4350 if (TREE_CODE (t
) != UNION_TYPE
)
4351 error_at (DECL_SOURCE_LOCATION (decl
),
4352 "an anonymous struct cannot have function members");
4354 error_at (DECL_SOURCE_LOCATION (decl
),
4355 "an anonymous union cannot have function members");
4358 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4359 assignment operators (because they cannot have these methods themselves).
4360 For anonymous unions this is already checked because they are not allowed
4361 in any union, otherwise we have to check it. */
4362 if (TREE_CODE (t
) != UNION_TYPE
)
4366 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4367 if (TREE_CODE (field
) == FIELD_DECL
)
4369 type
= TREE_TYPE (field
);
4370 if (CLASS_TYPE_P (type
))
4372 if (TYPE_NEEDS_CONSTRUCTING (type
))
4373 error ("member %q+#D with constructor not allowed "
4374 "in anonymous aggregate", field
);
4375 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4376 error ("member %q+#D with destructor not allowed "
4377 "in anonymous aggregate", field
);
4378 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4379 error ("member %q+#D with copy assignment operator "
4380 "not allowed in anonymous aggregate", field
);
4386 /* Warn for an attribute located at LOCATION that appertains to the
4387 class type CLASS_TYPE that has not been properly placed after its
4388 class-key, in it class-specifier. */
4391 warn_misplaced_attr_for_class_type (source_location location
,
4394 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4396 if (warning_at (location
, OPT_Wattributes
,
4397 "attribute ignored in declaration "
4398 "of %q#T", class_type
))
4400 "attribute for %q#T must follow the %qs keyword",
4401 class_type
, class_key_or_enum_as_string (class_type
));
4404 /* Make sure that a declaration with no declarator is well-formed, i.e.
4405 just declares a tagged type or anonymous union.
4407 Returns the type declared; or NULL_TREE if none. */
4410 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4411 bool explicit_type_instantiation_p
)
4413 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4414 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4415 /* If a class, struct, or enum type is declared by the DECLSPECS
4416 (i.e, if a class-specifier, enum-specifier, or non-typename
4417 elaborated-type-specifier appears in the DECLSPECS),
4418 DECLARED_TYPE is set to the corresponding type. */
4419 tree declared_type
= NULL_TREE
;
4420 bool error_p
= false;
4422 if (declspecs
->multiple_types_p
)
4423 error ("multiple types in one declaration");
4424 else if (declspecs
->redefined_builtin_type
)
4426 if (!in_system_header_at (input_location
))
4427 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4428 "redeclaration of C++ built-in type %qT",
4429 declspecs
->redefined_builtin_type
);
4434 && TYPE_P (declspecs
->type
)
4435 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4436 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4437 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4438 declared_type
= declspecs
->type
;
4439 else if (declspecs
->type
== error_mark_node
)
4441 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4442 permerror (input_location
, "declaration does not declare anything");
4443 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4445 error ("%<auto%> can only be specified for variables "
4446 "or function declarations");
4447 return error_mark_node
;
4449 /* Check for an anonymous union. */
4450 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4451 && TYPE_ANONYMOUS_P (declared_type
))
4453 /* 7/3 In a simple-declaration, the optional init-declarator-list
4454 can be omitted only when declaring a class (clause 9) or
4455 enumeration (7.2), that is, when the decl-specifier-seq contains
4456 either a class-specifier, an elaborated-type-specifier with
4457 a class-key (9.1), or an enum-specifier. In these cases and
4458 whenever a class-specifier or enum-specifier is present in the
4459 decl-specifier-seq, the identifiers in these specifiers are among
4460 the names being declared by the declaration (as class-name,
4461 enum-names, or enumerators, depending on the syntax). In such
4462 cases, and except for the declaration of an unnamed bit-field (9.6),
4463 the decl-specifier-seq shall introduce one or more names into the
4464 program, or shall redeclare a name introduced by a previous
4465 declaration. [Example:
4466 enum { }; // ill-formed
4467 typedef class { }; // ill-formed
4471 error ("missing type-name in typedef-declaration");
4474 /* Anonymous unions are objects, so they can have specifiers. */;
4475 SET_ANON_AGGR_TYPE_P (declared_type
);
4477 if (TREE_CODE (declared_type
) != UNION_TYPE
4478 && !in_system_header_at (input_location
))
4479 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4484 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4485 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4486 error ("%qs can only be specified for functions",
4487 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4488 ? "inline" : "virtual");
4490 && (!current_class_type
4491 || current_scope () != current_class_type
))
4492 error ("%<friend%> can only be specified inside a class");
4493 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4494 error ("%<explicit%> can only be specified for constructors");
4495 else if (declspecs
->storage_class
)
4496 error ("a storage class can only be specified for objects "
4498 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4499 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4500 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4501 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4502 error ("qualifiers can only be specified for objects "
4504 else if (saw_typedef
)
4505 warning (0, "%<typedef%> was ignored in this declaration");
4506 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4507 error ("%<constexpr%> cannot be used for type declarations");
4510 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4513 if (!CLASS_TYPE_P (declared_type
)
4514 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4515 /* For a non-template class, use the name location. */
4516 loc
= location_of (declared_type
);
4518 /* For a template class (an explicit instantiation), use the
4519 current location. */
4520 loc
= input_location
;
4522 if (explicit_type_instantiation_p
)
4523 /* [dcl.attr.grammar]/4:
4525 No attribute-specifier-seq shall appertain to an explicit
4528 if (warning_at (loc
, OPT_Wattributes
,
4529 "attribute ignored in explicit instantiation %q#T",
4532 "no attribute can be applied to "
4533 "an explicit instantiation");
4536 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4539 return declared_type
;
4542 /* Called when a declaration is seen that contains no names to declare.
4543 If its type is a reference to a structure, union or enum inherited
4544 from a containing scope, shadow that tag name for the current scope
4545 with a forward reference.
4546 If its type defines a new named structure or union
4547 or defines an enum, it is valid but we need not do anything here.
4548 Otherwise, it is an error.
4550 C++: may have to grok the declspecs to learn about static,
4551 complain for anonymous unions.
4553 Returns the TYPE declared -- or NULL_TREE if none. */
4556 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4558 tree t
= check_tag_decl (declspecs
,
4559 /*explicit_type_instantiation_p=*/false);
4564 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4567 /* This is where the variables in an anonymous union are
4568 declared. An anonymous union declaration looks like:
4570 because there is no declarator after the union, the parser
4571 sends that declaration here. */
4572 if (ANON_AGGR_TYPE_P (t
))
4574 fixup_anonymous_aggr (t
);
4576 if (TYPE_FIELDS (t
))
4578 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4579 declspecs
, NORMAL
, 0, NULL
);
4580 finish_anon_union (decl
);
4587 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4590 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4591 const cp_declarator
*declarator
,
4592 bool is_template_arg
)
4596 enum decl_context context
4597 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4598 attrs
= type_specifiers
->attributes
;
4599 type_specifiers
->attributes
= NULL_TREE
;
4600 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4601 if (attrs
&& type
!= error_mark_node
)
4603 if (CLASS_TYPE_P (type
))
4604 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4605 "outside of definition", type
);
4606 else if (MAYBE_CLASS_TYPE_P (type
))
4607 /* A template type parameter or other dependent type. */
4608 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4609 "type %qT without an associated declaration", type
);
4611 cplus_decl_attributes (&type
, attrs
, 0);
4616 /* Process a DECLARATOR for a function-scope variable declaration,
4617 namespace-scope variable declaration, or function declaration.
4618 (Function definitions go through start_function; class member
4619 declarations appearing in the body of the class go through
4620 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4621 If an error occurs, the error_mark_node is returned instead.
4623 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4624 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4625 for an explicitly defaulted function, or SD_DELETED for an explicitly
4626 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4627 implicitly initialized via a default constructor. ATTRIBUTES and
4628 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4630 The scope represented by the context of the returned DECL is pushed
4631 (if it is not the global namespace) and is assigned to
4632 *PUSHED_SCOPE_P. The caller is then responsible for calling
4633 pop_scope on *PUSHED_SCOPE_P if it is set. */
4636 start_decl (const cp_declarator
*declarator
,
4637 cp_decl_specifier_seq
*declspecs
,
4640 tree prefix_attributes
,
4641 tree
*pushed_scope_p
)
4649 *pushed_scope_p
= NULL_TREE
;
4651 /* An object declared as __attribute__((deprecated)) suppresses
4652 warnings of uses of other deprecated items. */
4653 if (lookup_attribute ("deprecated", attributes
))
4654 deprecated_state
= DEPRECATED_SUPPRESS
;
4656 attributes
= chainon (attributes
, prefix_attributes
);
4658 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4661 deprecated_state
= DEPRECATED_NORMAL
;
4663 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4664 || decl
== error_mark_node
)
4665 return error_mark_node
;
4667 context
= CP_DECL_CONTEXT (decl
);
4668 if (context
!= global_namespace
)
4669 *pushed_scope_p
= push_scope (context
);
4671 /* Is it valid for this decl to have an initializer at all?
4672 If not, set INITIALIZED to zero, which will indirectly
4673 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4675 && TREE_CODE (decl
) == TYPE_DECL
)
4677 error ("typedef %qD is initialized (use decltype instead)", decl
);
4678 return error_mark_node
;
4683 if (! toplevel_bindings_p ()
4684 && DECL_EXTERNAL (decl
))
4685 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4687 DECL_EXTERNAL (decl
) = 0;
4688 if (toplevel_bindings_p ())
4689 TREE_STATIC (decl
) = 1;
4691 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4693 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4694 record_key_method_defined (decl
);
4696 /* If this is a typedef that names the class for linkage purposes
4697 (7.1.3p8), apply any attributes directly to the type. */
4698 if (TREE_CODE (decl
) == TYPE_DECL
4699 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4700 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4701 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4705 /* Set attributes here so if duplicate decl, will have proper attributes. */
4706 cplus_decl_attributes (&decl
, attributes
, flags
);
4708 /* Dllimported symbols cannot be defined. Static data members (which
4709 can be initialized in-class and dllimported) go through grokfield,
4710 not here, so we don't need to exclude those decls when checking for
4712 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4714 error ("definition of %q#D is marked %<dllimport%>", decl
);
4715 DECL_DLLIMPORT_P (decl
) = 0;
4718 /* If #pragma weak was used, mark the decl weak now. */
4719 if (!processing_template_decl
)
4720 maybe_apply_pragma_weak (decl
);
4722 if (TREE_CODE (decl
) == FUNCTION_DECL
4723 && DECL_DECLARED_INLINE_P (decl
)
4724 && DECL_UNINLINABLE (decl
)
4725 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4726 warning (0, "inline function %q+D given attribute noinline", decl
);
4728 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4730 bool this_tmpl
= (processing_template_decl
4731 > template_class_depth (context
));
4734 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4735 if (field
== NULL_TREE
4736 || !(VAR_P (field
) || variable_template_p (field
)))
4737 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4738 else if (variable_template_p (field
) && !this_tmpl
)
4740 if (DECL_LANG_SPECIFIC (decl
)
4741 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4742 /* OK, specialization was already checked. */;
4745 error_at (DECL_SOURCE_LOCATION (decl
),
4746 "non-member-template declaration of %qD", decl
);
4747 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4748 "member template declaration here");
4749 return error_mark_node
;
4754 if (variable_template_p (field
))
4755 field
= DECL_TEMPLATE_RESULT (field
);
4757 if (DECL_CONTEXT (field
) != context
)
4759 if (!same_type_p (DECL_CONTEXT (field
), context
))
4760 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4761 "to be defined as %<%T::%D%>",
4762 DECL_CONTEXT (field
), DECL_NAME (decl
),
4763 context
, DECL_NAME (decl
));
4764 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4766 /* Static data member are tricky; an in-class initialization
4767 still doesn't provide a definition, so the in-class
4768 declaration will have DECL_EXTERNAL set, but will have an
4769 initialization. Thus, duplicate_decls won't warn
4770 about this situation, and so we check here. */
4771 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4772 error ("duplicate initialization of %qD", decl
);
4773 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4775 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4776 && !DECL_DECLARED_CONSTEXPR_P (field
))
4777 error ("%qD declared %<constexpr%> outside its class", field
);
4782 tree field
= check_classfn (context
, decl
,
4784 ? current_template_parms
4786 if (field
&& field
!= error_mark_node
4787 && duplicate_decls (decl
, field
,
4788 /*newdecl_is_friend=*/false))
4792 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4793 DECL_IN_AGGR_P (decl
) = 0;
4794 /* Do not mark DECL as an explicit specialization if it was not
4795 already marked as an instantiation; a declaration should
4796 never be marked as a specialization unless we know what
4797 template is being specialized. */
4798 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4800 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4801 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4802 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4803 && DECL_DECLARED_INLINE_P (decl
));
4805 DECL_COMDAT (decl
) = false;
4807 /* [temp.expl.spec] An explicit specialization of a static data
4808 member of a template is a definition if the declaration
4809 includes an initializer; otherwise, it is a declaration.
4811 We check for processing_specialization so this only applies
4812 to the new specialization syntax. */
4813 if (!initialized
&& processing_specialization
)
4814 DECL_EXTERNAL (decl
) = 1;
4817 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4818 /* Aliases are definitions. */
4820 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4824 was_public
= TREE_PUBLIC (decl
);
4826 /* Enter this declaration into the symbol table. */
4827 decl
= maybe_push_decl (decl
);
4829 if (processing_template_decl
)
4830 decl
= push_template_decl (decl
);
4831 if (decl
== error_mark_node
)
4832 return error_mark_node
;
4835 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4836 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4838 /* This is a const variable with implicit 'static'. Set
4839 DECL_THIS_STATIC so we can tell it from variables that are
4840 !TREE_PUBLIC because of the anonymous namespace. */
4841 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4842 DECL_THIS_STATIC (decl
) = 1;
4845 if (current_function_decl
&& VAR_P (decl
)
4846 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4849 if (DECL_THREAD_LOCAL_P (decl
))
4850 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4852 else if (TREE_STATIC (decl
))
4853 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4857 cp_function_chain
->invalid_constexpr
= true;
4860 if (!processing_template_decl
&& VAR_P (decl
))
4861 start_decl_1 (decl
, initialized
);
4866 /* Process the declaration of a variable DECL. INITIALIZED is true
4867 iff DECL is explicitly initialized. (INITIALIZED is false if the
4868 variable is initialized via an implicitly-called constructor.)
4869 This function must be called for ordinary variables (including, for
4870 example, implicit instantiations of templates), but must not be
4871 called for template declarations. */
4874 start_decl_1 (tree decl
, bool initialized
)
4878 bool aggregate_definition_p
;
4880 gcc_assert (!processing_template_decl
);
4882 if (error_operand_p (decl
))
4885 gcc_assert (VAR_P (decl
));
4887 type
= TREE_TYPE (decl
);
4888 complete_p
= COMPLETE_TYPE_P (type
);
4889 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4891 /* If an explicit initializer is present, or if this is a definition
4892 of an aggregate, then we need a complete type at this point.
4893 (Scalars are always complete types, so there is nothing to
4894 check.) This code just sets COMPLETE_P; errors (if necessary)
4895 are issued below. */
4896 if ((initialized
|| aggregate_definition_p
)
4898 && COMPLETE_TYPE_P (complete_type (type
)))
4901 /* We will not yet have set TREE_READONLY on DECL if the type
4902 was "const", but incomplete, before this point. But, now, we
4903 have a complete type, so we can try again. */
4904 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4908 /* Is it valid for this decl to have an initializer at all? */
4910 /* Don't allow initializations for incomplete types except for
4911 arrays which might be completed by the initialization. */
4913 ; /* A complete type is ok. */
4914 else if (type_uses_auto (type
))
4915 ; /* An auto type is ok. */
4916 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4918 error ("variable %q#D has initializer but incomplete type", decl
);
4919 type
= TREE_TYPE (decl
) = error_mark_node
;
4921 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4923 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4924 error ("elements of array %q#D have incomplete type", decl
);
4925 /* else we already gave an error in start_decl. */
4928 else if (aggregate_definition_p
&& !complete_p
)
4930 if (type_uses_auto (type
))
4931 error ("declaration of %q#D has no initializer", decl
);
4933 error ("aggregate %q#D has incomplete type and cannot be defined",
4935 /* Change the type so that assemble_variable will give
4936 DECL an rtl we can live with: (mem (const_int 0)). */
4937 type
= TREE_TYPE (decl
) = error_mark_node
;
4940 /* Create a new scope to hold this declaration if necessary.
4941 Whether or not a new scope is necessary cannot be determined
4942 until after the type has been completed; if the type is a
4943 specialization of a class template it is not until after
4944 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4945 will be set correctly. */
4946 maybe_push_cleanup_level (type
);
4949 /* Handle initialization of references. DECL, TYPE, and INIT have the
4950 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4951 but will be set to a new CLEANUP_STMT if a temporary is created
4952 that must be destroyed subsequently.
4954 Returns an initializer expression to use to initialize DECL, or
4955 NULL if the initialization can be performed statically.
4957 Quotes on semantics can be found in ARM 8.4.3. */
4960 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4962 if (init
== NULL_TREE
)
4964 if ((DECL_LANG_SPECIFIC (decl
) == 0
4965 || DECL_IN_AGGR_P (decl
) == 0)
4966 && ! DECL_THIS_EXTERN (decl
))
4967 error ("%qD declared as reference but not initialized", decl
);
4971 if (TREE_CODE (init
) == TREE_LIST
)
4972 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4973 tf_warning_or_error
);
4975 tree ttype
= TREE_TYPE (type
);
4976 if (TREE_CODE (ttype
) != ARRAY_TYPE
4977 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4978 /* Note: default conversion is only called in very special cases. */
4979 init
= decay_conversion (init
, tf_warning_or_error
);
4981 /* check_initializer handles this for non-reference variables, but for
4982 references we need to do it here or the initializer will get the
4983 incomplete array type and confuse later calls to
4984 cp_complete_array_type. */
4985 if (TREE_CODE (ttype
) == ARRAY_TYPE
4986 && TYPE_DOMAIN (ttype
) == NULL_TREE
4987 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
4988 || TREE_CODE (init
) == STRING_CST
))
4990 cp_complete_array_type (&ttype
, init
, false);
4991 if (ttype
!= TREE_TYPE (type
))
4992 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
4995 /* Convert INIT to the reference type TYPE. This may involve the
4996 creation of a temporary, whose lifetime must be the same as that
4997 of the reference. If so, a DECL_EXPR for the temporary will be
4998 added just after the DECL_EXPR for DECL. That's why we don't set
4999 DECL_INITIAL for local references (instead assigning to them
5000 explicitly); we need to allow the temporary to be initialized
5002 return initialize_reference (type
, init
, flags
,
5003 tf_warning_or_error
);
5006 /* Designated initializers in arrays are not supported in GNU C++.
5007 The parser cannot detect this error since it does not know whether
5008 a given brace-enclosed initializer is for a class type or for an
5009 array. This function checks that CE does not use a designated
5010 initializer. If it does, an error is issued. Returns true if CE
5011 is valid, i.e., does not have a designated initializer. */
5014 check_array_designated_initializer (constructor_elt
*ce
,
5015 unsigned HOST_WIDE_INT index
)
5017 /* Designated initializers for array elements are not supported. */
5020 /* The parser only allows identifiers as designated
5022 if (ce
->index
== error_mark_node
)
5024 error ("name used in a GNU-style designated "
5025 "initializer for an array");
5028 else if (identifier_p (ce
->index
))
5030 error ("name %qD used in a GNU-style designated "
5031 "initializer for an array", ce
->index
);
5035 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5038 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5039 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5042 /* A C99 designator is OK if it matches the current index. */
5043 if (wi::eq_p (ce_index
, index
))
5046 sorry ("non-trivial designated initializers not supported");
5049 error ("C99 designator %qE is not an integral constant-expression",
5058 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5059 array until we finish parsing the initializer. If that's the
5060 situation we're in, update DECL accordingly. */
5063 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5065 tree type
= TREE_TYPE (decl
);
5067 if (TREE_CODE (type
) == ARRAY_TYPE
5068 && TYPE_DOMAIN (type
) == NULL_TREE
5069 && TREE_CODE (decl
) != TYPE_DECL
)
5071 /* do_default is really a C-ism to deal with tentative definitions.
5072 But let's leave it here to ease the eventual merge. */
5073 int do_default
= !DECL_EXTERNAL (decl
);
5074 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5077 /* Check that there are no designated initializers in INIT, as
5078 those are not supported in GNU C++, and as the middle-end
5079 will crash if presented with a non-numeric designated
5081 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5083 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5084 constructor_elt
*ce
;
5086 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5087 if (!check_array_designated_initializer (ce
, i
))
5093 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5097 error ("initializer fails to determine size of %qD", decl
);
5099 else if (failure
== 2)
5103 error ("array size missing in %qD", decl
);
5105 /* If a `static' var's size isn't known, make it extern as
5106 well as static, so it does not get allocated. If it's not
5107 `static', then don't mark it extern; finish_incomplete_decl
5108 will give it a default size and it will get allocated. */
5109 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5110 DECL_EXTERNAL (decl
) = 1;
5112 else if (failure
== 3)
5114 error ("zero-size array %qD", decl
);
5118 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5120 relayout_decl (decl
);
5124 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5125 any appropriate error messages regarding the layout. */
5128 layout_var_decl (tree decl
)
5132 type
= TREE_TYPE (decl
);
5133 if (type
== error_mark_node
)
5136 /* If we haven't already laid out this declaration, do so now.
5137 Note that we must not call complete type for an external object
5138 because it's type might involve templates that we are not
5139 supposed to instantiate yet. (And it's perfectly valid to say
5140 `extern X x' for some incomplete type `X'.) */
5141 if (!DECL_EXTERNAL (decl
))
5142 complete_type (type
);
5143 if (!DECL_SIZE (decl
)
5144 && TREE_TYPE (decl
) != error_mark_node
5145 && (COMPLETE_TYPE_P (type
)
5146 || (TREE_CODE (type
) == ARRAY_TYPE
5147 && !TYPE_DOMAIN (type
)
5148 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5149 layout_decl (decl
, 0);
5151 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5153 /* An automatic variable with an incomplete type: that is an error.
5154 Don't talk about array types here, since we took care of that
5155 message in grokdeclarator. */
5156 error ("storage size of %qD isn%'t known", decl
);
5157 TREE_TYPE (decl
) = error_mark_node
;
5160 /* Keep this code around in case we later want to control debug info
5161 based on whether a type is "used". (jason 1999-11-11) */
5163 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5164 /* Let debugger know it should output info for this type. */
5165 note_debug_info_needed (ttype
);
5167 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5168 note_debug_info_needed (DECL_CONTEXT (decl
));
5171 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5172 && DECL_SIZE (decl
) != NULL_TREE
5173 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5175 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5176 constant_expression_warning (DECL_SIZE (decl
));
5179 error ("storage size of %qD isn%'t constant", decl
);
5180 TREE_TYPE (decl
) = error_mark_node
;
5185 /* If a local static variable is declared in an inline function, or if
5186 we have a weak definition, we must endeavor to create only one
5187 instance of the variable at link-time. */
5190 maybe_commonize_var (tree decl
)
5192 /* Static data in a function with comdat linkage also has comdat
5194 if (TREE_STATIC (decl
)
5195 /* Don't mess with __FUNCTION__. */
5196 && ! DECL_ARTIFICIAL (decl
)
5197 && DECL_FUNCTION_SCOPE_P (decl
)
5198 && vague_linkage_p (DECL_CONTEXT (decl
)))
5202 /* With weak symbols, we simply make the variable COMDAT;
5203 that will cause copies in multiple translations units to
5205 comdat_linkage (decl
);
5209 if (DECL_INITIAL (decl
) == NULL_TREE
5210 || DECL_INITIAL (decl
) == error_mark_node
)
5212 /* Without weak symbols, we can use COMMON to merge
5213 uninitialized variables. */
5214 TREE_PUBLIC (decl
) = 1;
5215 DECL_COMMON (decl
) = 1;
5219 /* While for initialized variables, we must use internal
5220 linkage -- which means that multiple copies will not
5222 TREE_PUBLIC (decl
) = 0;
5223 DECL_COMMON (decl
) = 0;
5224 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5225 "sorry: semantics of inline function static "
5226 "data %q#D are wrong (you%'ll wind up "
5227 "with multiple copies)", decl
))
5228 inform (DECL_SOURCE_LOCATION (decl
),
5229 "you can work around this by removing the initializer");
5235 /* Issue an error message if DECL is an uninitialized const variable. */
5238 check_for_uninitialized_const_var (tree decl
)
5240 tree type
= strip_array_types (TREE_TYPE (decl
));
5242 /* ``Unless explicitly declared extern, a const object does not have
5243 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5246 && TREE_CODE (type
) != REFERENCE_TYPE
5247 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5248 && !DECL_INITIAL (decl
))
5250 tree field
= default_init_uninitialized_part (type
);
5254 if (CP_TYPE_CONST_P (type
))
5255 permerror (DECL_SOURCE_LOCATION (decl
),
5256 "uninitialized const %qD", decl
);
5259 error_at (DECL_SOURCE_LOCATION (decl
),
5260 "uninitialized variable %qD in %<constexpr%> function",
5262 cp_function_chain
->invalid_constexpr
= true;
5265 if (CLASS_TYPE_P (type
))
5267 tree defaulted_ctor
;
5269 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5270 "%q#T has no user-provided default constructor", type
);
5271 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5273 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5274 "constructor is not user-provided because it is "
5275 "explicitly defaulted in the class body");
5276 inform (0, "and the implicitly-defined constructor does not "
5277 "initialize %q+#D", field
);
5282 /* Structure holding the current initializer being processed by reshape_init.
5283 CUR is a pointer to the current element being processed, END is a pointer
5284 after the last element present in the initializer. */
5285 typedef struct reshape_iterator_t
5287 constructor_elt
*cur
;
5288 constructor_elt
*end
;
5291 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5293 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5294 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5295 initialized. If there are no more such fields, the return value
5299 next_initializable_field (tree field
)
5302 && (TREE_CODE (field
) != FIELD_DECL
5303 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5304 || DECL_ARTIFICIAL (field
)))
5305 field
= DECL_CHAIN (field
);
5310 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5311 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5312 INTEGER_CST representing the size of the array minus one (the maximum index),
5313 or NULL_TREE if the array was declared without specifying the size. D is
5314 the iterator within the constructor. */
5317 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5318 tsubst_flags_t complain
)
5321 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5322 unsigned HOST_WIDE_INT max_index_cst
= 0;
5323 unsigned HOST_WIDE_INT index
;
5325 /* The initializer for an array is always a CONSTRUCTOR. */
5326 new_init
= build_constructor (init_list_type_node
, NULL
);
5330 /* Minus 1 is used for zero sized arrays. */
5331 if (integer_all_onesp (max_index
))
5334 if (tree_fits_uhwi_p (max_index
))
5335 max_index_cst
= tree_to_uhwi (max_index
);
5336 /* sizetype is sign extended, not zero extended. */
5338 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5341 /* Loop until there are no more initializers. */
5343 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5347 constructor_elt
*old_cur
= d
->cur
;
5349 check_array_designated_initializer (d
->cur
, index
);
5350 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5352 if (elt_init
== error_mark_node
)
5353 return error_mark_node
;
5354 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5355 size_int (index
), elt_init
);
5356 if (!TREE_CONSTANT (elt_init
))
5357 TREE_CONSTANT (new_init
) = false;
5359 /* This can happen with an invalid initializer (c++/54501). */
5360 if (d
->cur
== old_cur
&& !sized_array_p
)
5367 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5368 Parameters are the same of reshape_init_r. */
5371 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5373 tree max_index
= NULL_TREE
;
5375 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5377 if (TYPE_DOMAIN (type
))
5378 max_index
= array_type_nelts (type
);
5380 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5383 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5384 Parameters are the same of reshape_init_r. */
5387 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5389 tree max_index
= NULL_TREE
;
5391 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5393 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5395 tree value
= d
->cur
->value
;
5396 if (!same_type_p (TREE_TYPE (value
), type
))
5398 if (complain
& tf_error
)
5399 error ("invalid type %qT as initializer for a vector of type %qT",
5400 TREE_TYPE (d
->cur
->value
), type
);
5401 value
= error_mark_node
;
5407 /* For a vector, we initialize it as an array of the appropriate size. */
5408 if (TREE_CODE (type
) == VECTOR_TYPE
)
5409 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5411 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5414 /* Subroutine of reshape_init_r, processes the initializers for classes
5415 or union. Parameters are the same of reshape_init_r. */
5418 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5419 tsubst_flags_t complain
)
5424 gcc_assert (CLASS_TYPE_P (type
));
5426 /* The initializer for a class is always a CONSTRUCTOR. */
5427 new_init
= build_constructor (init_list_type_node
, NULL
);
5428 field
= next_initializable_field (TYPE_FIELDS (type
));
5434 An initializer for an aggregate member that is an
5435 empty class shall have the form of an empty
5436 initializer-list {}. */
5437 if (!first_initializer_p
)
5439 if (complain
& tf_error
)
5440 error ("initializer for %qT must be brace-enclosed", type
);
5441 return error_mark_node
;
5446 /* Loop through the initializable fields, gathering initializers. */
5447 while (d
->cur
!= d
->end
)
5450 constructor_elt
*old_cur
= d
->cur
;
5452 /* Handle designated initializers, as an extension. */
5455 if (d
->cur
->index
== error_mark_node
)
5456 return error_mark_node
;
5458 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5459 /* We already reshaped this. */
5460 gcc_assert (d
->cur
->index
== field
);
5461 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5462 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5465 if (complain
& tf_error
)
5466 error ("%<[%E] =%> used in a GNU-style designated initializer"
5467 " for class %qT", d
->cur
->index
, type
);
5468 return error_mark_node
;
5471 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5473 if (complain
& tf_error
)
5474 error ("%qT has no non-static data member named %qD", type
,
5476 return error_mark_node
;
5480 /* If we processed all the member of the class, we are done. */
5484 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5485 /*first_initializer_p=*/false, complain
);
5486 if (field_init
== error_mark_node
)
5487 return error_mark_node
;
5489 if (d
->cur
== old_cur
&& d
->cur
->index
)
5491 /* This can happen with an invalid initializer for a flexible
5492 array member (c++/54441). */
5493 if (complain
& tf_error
)
5494 error ("invalid initializer for %q#D", field
);
5495 return error_mark_node
;
5498 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5502 When a union is initialized with a brace-enclosed
5503 initializer, the braces shall only contain an
5504 initializer for the first member of the union. */
5505 if (TREE_CODE (type
) == UNION_TYPE
)
5508 field
= next_initializable_field (DECL_CHAIN (field
));
5514 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5515 designators are not valid; either complain or return true to indicate
5516 that reshape_init_r should return error_mark_node. */
5519 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5523 if (complain
& tf_error
)
5524 error ("C99 designator %qE outside aggregate initializer",
5532 /* Subroutine of reshape_init, which processes a single initializer (part of
5533 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5534 iterator within the CONSTRUCTOR which points to the initializer to process.
5535 FIRST_INITIALIZER_P is true if this is the first initializer of the
5536 outermost CONSTRUCTOR node. */
5539 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5540 tsubst_flags_t complain
)
5542 tree init
= d
->cur
->value
;
5544 if (error_operand_p (init
))
5545 return error_mark_node
;
5547 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5548 && has_designator_problem (d
, complain
))
5549 return error_mark_node
;
5551 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5553 /* A complex type can be initialized from one or two initializers,
5554 but braces are not elided. */
5556 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5558 if (CONSTRUCTOR_NELTS (init
) > 2)
5560 if (complain
& tf_error
)
5561 error ("too many initializers for %qT", type
);
5563 return error_mark_node
;
5566 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5568 vec
<constructor_elt
, va_gc
> *v
= 0;
5569 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5570 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5571 if (has_designator_problem (d
, complain
))
5572 return error_mark_node
;
5574 init
= build_constructor (init_list_type_node
, v
);
5579 /* A non-aggregate type is always initialized with a single
5581 if (!CP_AGGREGATE_TYPE_P (type
))
5583 /* It is invalid to initialize a non-aggregate type with a
5584 brace-enclosed initializer before C++0x.
5585 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5586 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5587 a CONSTRUCTOR (with a record type). */
5588 if (TREE_CODE (init
) == CONSTRUCTOR
5589 /* Don't complain about a capture-init. */
5590 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5591 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5593 if (SCALAR_TYPE_P (type
))
5595 if (cxx_dialect
< cxx11
5596 /* Isn't value-initialization. */
5597 || CONSTRUCTOR_NELTS (init
) > 0)
5599 if (complain
& tf_error
)
5600 error ("braces around scalar initializer for type %qT",
5602 init
= error_mark_node
;
5606 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5613 /* "If T is a class type and the initializer list has a single element of
5614 type cv U, where U is T or a class derived from T, the object is
5615 initialized from that element." Even if T is an aggregate. */
5616 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5617 && first_initializer_p
5618 && d
->end
- d
->cur
== 1
5619 && reference_related_p (type
, TREE_TYPE (init
)))
5627 All implicit type conversions (clause _conv_) are considered when
5628 initializing the aggregate member with an initializer from an
5629 initializer-list. If the initializer can initialize a member,
5630 the member is initialized. Otherwise, if the member is itself a
5631 non-empty subaggregate, brace elision is assumed and the
5632 initializer is considered for the initialization of the first
5633 member of the subaggregate. */
5634 if (TREE_CODE (init
) != CONSTRUCTOR
5635 /* But don't try this for the first initializer, since that would be
5636 looking through the outermost braces; A a2 = { a1 }; is not a
5637 valid aggregate initialization. */
5638 && !first_initializer_p
5639 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5640 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5647 /* [dcl.init.string]
5649 A char array (whether plain char, signed char, or unsigned char)
5650 can be initialized by a string-literal (optionally enclosed in
5651 braces); a wchar_t array can be initialized by a wide
5652 string-literal (optionally enclosed in braces). */
5653 if (TREE_CODE (type
) == ARRAY_TYPE
5654 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5656 tree str_init
= init
;
5658 /* Strip one level of braces if and only if they enclose a single
5659 element (as allowed by [dcl.init.string]). */
5660 if (!first_initializer_p
5661 && TREE_CODE (str_init
) == CONSTRUCTOR
5662 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5664 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5667 /* If it's a string literal, then it's the initializer for the array
5668 as a whole. Otherwise, continue with normal initialization for
5669 array types (one value per array element). */
5670 if (TREE_CODE (str_init
) == STRING_CST
)
5672 if (has_designator_problem (d
, complain
))
5673 return error_mark_node
;
5679 /* The following cases are about aggregates. If we are not within a full
5680 initializer already, and there is not a CONSTRUCTOR, it means that there
5681 is a missing set of braces (that is, we are processing the case for
5682 which reshape_init exists). */
5683 if (!first_initializer_p
)
5685 if (TREE_CODE (init
) == CONSTRUCTOR
)
5687 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5688 /* There is no need to reshape pointer-to-member function
5689 initializers, as they are always constructed correctly
5690 by the front end. */
5692 else if (COMPOUND_LITERAL_P (init
))
5693 /* For a nested compound literal, there is no need to reshape since
5694 brace elision is not allowed. Even if we decided to allow it,
5695 we should add a call to reshape_init in finish_compound_literal,
5696 before calling digest_init, so changing this code would still
5697 not be necessary. */
5698 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5702 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5703 return reshape_init (type
, init
, complain
);
5707 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5711 /* Dispatch to specialized routines. */
5712 if (CLASS_TYPE_P (type
))
5713 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5714 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5715 return reshape_init_array (type
, d
, complain
);
5716 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5717 return reshape_init_vector (type
, d
, complain
);
5722 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5723 brace-enclosed aggregate initializer.
5725 INIT is the CONSTRUCTOR containing the list of initializers describing
5726 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5727 It may not presently match the shape of the TYPE; for example:
5729 struct S { int a; int b; };
5730 struct S a[] = { 1, 2, 3, 4 };
5732 Here INIT will hold a vector of four elements, rather than a
5733 vector of two elements, each itself a vector of two elements. This
5734 routine transforms INIT from the former form into the latter. The
5735 revised CONSTRUCTOR node is returned. */
5738 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5740 vec
<constructor_elt
, va_gc
> *v
;
5744 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5746 v
= CONSTRUCTOR_ELTS (init
);
5748 /* An empty constructor does not need reshaping, and it is always a valid
5750 if (vec_safe_is_empty (v
))
5753 /* Recurse on this CONSTRUCTOR. */
5755 d
.end
= d
.cur
+ v
->length ();
5757 new_init
= reshape_init_r (type
, &d
, true, complain
);
5758 if (new_init
== error_mark_node
)
5759 return error_mark_node
;
5761 /* Make sure all the element of the constructor were used. Otherwise,
5762 issue an error about exceeding initializers. */
5765 if (complain
& tf_error
)
5766 error ("too many initializers for %qT", type
);
5768 return error_mark_node
;
5774 /* Verify array initializer. Returns true if errors have been reported. */
5777 check_array_initializer (tree decl
, tree type
, tree init
)
5779 tree element_type
= TREE_TYPE (type
);
5781 /* The array type itself need not be complete, because the
5782 initializer may tell us how many elements are in the array.
5783 But, the elements of the array must be complete. */
5784 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5787 error ("elements of array %q#D have incomplete type", decl
);
5789 error ("elements of array %q#T have incomplete type", type
);
5792 /* A compound literal can't have variable size. */
5794 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5795 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5797 error ("variable-sized compound literal");
5803 /* Subroutine of check_initializer; args are passed down from that function.
5804 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5807 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5810 gcc_assert (stmts_are_full_exprs_p ());
5811 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5814 /* Verify INIT (the initializer for DECL), and record the
5815 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5816 grok_reference_init.
5818 If the return value is non-NULL, it is an expression that must be
5819 evaluated dynamically to initialize DECL. */
5822 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5824 tree type
= TREE_TYPE (decl
);
5825 tree init_code
= NULL
;
5828 /* Things that are going to be initialized need to have complete
5830 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5832 if (DECL_HAS_VALUE_EXPR_P (decl
))
5834 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5835 it doesn't have storage to be initialized. */
5836 gcc_assert (init
== NULL_TREE
);
5840 if (type
== error_mark_node
)
5841 /* We will have already complained. */
5844 if (TREE_CODE (type
) == ARRAY_TYPE
)
5846 if (check_array_initializer (decl
, type
, init
))
5849 else if (!COMPLETE_TYPE_P (type
))
5851 error ("%q#D has incomplete type", decl
);
5852 TREE_TYPE (decl
) = error_mark_node
;
5856 /* There is no way to make a variable-sized class type in GNU C++. */
5857 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5859 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5861 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5862 if (SCALAR_TYPE_P (type
))
5866 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5867 init
= build_zero_init (type
, NULL_TREE
, false);
5869 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5871 error ("scalar object %qD requires one element in initializer",
5873 TREE_TYPE (decl
) = error_mark_node
;
5879 if (TREE_CODE (decl
) == CONST_DECL
)
5881 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5883 DECL_INITIAL (decl
) = init
;
5885 gcc_assert (init
!= NULL_TREE
);
5888 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5890 else if (init
|| type_build_ctor_call (type
)
5891 || TREE_CODE (type
) == REFERENCE_TYPE
)
5893 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5895 init
= grok_reference_init (decl
, type
, init
, flags
);
5896 flags
|= LOOKUP_ALREADY_DIGESTED
;
5899 check_for_uninitialized_const_var (decl
);
5900 /* Do not reshape constructors of vectors (they don't need to be
5902 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5904 if (is_std_init_list (type
))
5906 init
= perform_implicit_conversion (type
, init
,
5907 tf_warning_or_error
);
5908 flags
|= LOOKUP_ALREADY_DIGESTED
;
5910 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5912 /* Don't reshape if the class has constructors. */
5913 if (cxx_dialect
== cxx98
)
5914 error ("in C++98 %qD must be initialized by constructor, "
5918 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5920 error ("opaque vector types cannot be initialized");
5921 init
= error_mark_node
;
5925 init
= reshape_init (type
, init
, tf_warning_or_error
);
5926 flags
|= LOOKUP_NO_NARROWING
;
5929 else if (TREE_CODE (init
) == TREE_LIST
5930 && TREE_TYPE (init
) != unknown_type_node
5931 && !MAYBE_CLASS_TYPE_P (type
))
5933 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5935 /* We get here with code like `int a (2);' */
5936 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5937 tf_warning_or_error
);
5940 /* If DECL has an array type without a specific bound, deduce the
5941 array size from the initializer. */
5942 maybe_deduce_size_from_array_init (decl
, init
);
5943 type
= TREE_TYPE (decl
);
5944 if (type
== error_mark_node
)
5947 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5948 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5949 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5950 && CP_AGGREGATE_TYPE_P (type
)
5951 && (CLASS_TYPE_P (type
)
5952 || !TYPE_NEEDS_CONSTRUCTING (type
)
5953 || type_has_extended_temps (type
))))
5955 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5957 /* A constructor call is a non-trivial initializer even if
5958 it isn't explicitly written. */
5959 if (TREE_SIDE_EFFECTS (init_code
))
5960 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5962 /* If this is a constexpr initializer, expand_default_init will
5963 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5964 case, pull the initializer back out and pass it down into
5965 store_init_value. */
5966 while (TREE_CODE (init_code
) == EXPR_STMT
5967 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5968 init_code
= TREE_OPERAND (init_code
, 0);
5969 if (TREE_CODE (init_code
) == INIT_EXPR
)
5971 init
= TREE_OPERAND (init_code
, 1);
5972 init_code
= NULL_TREE
;
5973 /* Don't call digest_init; it's unnecessary and will complain
5974 about aggregate initialization of non-aggregate classes. */
5975 flags
|= LOOKUP_ALREADY_DIGESTED
;
5977 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5979 /* Declared constexpr, but no suitable initializer; massage
5980 init appropriately so we can pass it into store_init_value
5982 if (CLASS_TYPE_P (type
)
5983 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5985 init
= build_functional_cast (type
, init
, tf_none
);
5986 if (TREE_CODE (init
) == TARGET_EXPR
)
5987 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5989 init_code
= NULL_TREE
;
5995 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5997 /* In aggregate initialization of a variable, each element
5998 initialization is a full-expression because there is no
5999 enclosing expression. */
6000 gcc_assert (stmts_are_full_exprs_p ());
6002 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6004 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6005 && DECL_INITIAL (decl
)
6006 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6007 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6008 warning (0, "array %qD initialized by parenthesized string literal %qE",
6009 decl
, DECL_INITIAL (decl
));
6015 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6016 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6017 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6018 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6021 check_for_uninitialized_const_var (decl
);
6024 if (init
&& init
!= error_mark_node
)
6025 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6029 /* We might have set these in cp_finish_decl. */
6030 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6031 TREE_CONSTANT (decl
) = false;
6034 if (init_code
&& DECL_IN_AGGR_P (decl
))
6036 static int explained
= 0;
6038 if (cxx_dialect
< cxx11
)
6039 error ("initializer invalid for static member with constructor");
6041 error ("non-constant in-class initialization invalid for static "
6042 "member %qD", decl
);
6045 inform (input_location
,
6046 "(an out of class initialization is required)");
6055 /* If DECL is not a local variable, give it RTL. */
6058 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6060 int toplev
= toplevel_bindings_p ();
6062 const char *filename
;
6064 /* Set the DECL_ASSEMBLER_NAME for the object. */
6067 /* The `register' keyword, when used together with an
6068 asm-specification, indicates that the variable should be
6069 placed in a particular register. */
6070 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6072 set_user_assembler_name (decl
, asmspec
);
6073 DECL_HARD_REGISTER (decl
) = 1;
6077 if (TREE_CODE (decl
) == FUNCTION_DECL
6078 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6079 set_builtin_user_assembler_name (decl
, asmspec
);
6080 set_user_assembler_name (decl
, asmspec
);
6084 /* Handle non-variables up front. */
6087 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6091 /* If we see a class member here, it should be a static data
6093 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6095 gcc_assert (TREE_STATIC (decl
));
6096 /* An in-class declaration of a static data member should be
6097 external; it is only a declaration, and not a definition. */
6098 if (init
== NULL_TREE
)
6099 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6102 /* We don't create any RTL for local variables. */
6103 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6106 /* We defer emission of local statics until the corresponding
6107 DECL_EXPR is expanded. */
6108 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6110 /* We try to defer namespace-scope static constants so that they are
6111 not emitted into the object file unnecessarily. */
6112 filename
= LOCATION_FILE (input_location
);
6113 if (!DECL_VIRTUAL_P (decl
)
6114 && TREE_READONLY (decl
)
6115 && DECL_INITIAL (decl
) != NULL_TREE
6116 && DECL_INITIAL (decl
) != error_mark_node
6118 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
6120 && !TREE_PUBLIC (decl
))
6122 /* Fool with the linkage of static consts according to #pragma
6124 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
6125 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
6127 TREE_PUBLIC (decl
) = 1;
6128 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
6133 /* Likewise for template instantiations. */
6134 else if (DECL_LANG_SPECIFIC (decl
)
6135 && DECL_IMPLICIT_INSTANTIATION (decl
))
6138 /* If we're not deferring, go ahead and assemble the variable. */
6140 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6143 /* walk_tree helper for wrap_temporary_cleanups, below. */
6146 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6148 /* Stop at types or full-expression boundaries. */
6149 if (TYPE_P (*stmt_p
)
6150 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6156 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6158 tree guard
= (tree
)data
;
6159 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6161 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6162 /* Tell honor_protect_cleanup_actions to handle this as a separate
6164 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6166 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6172 /* We're initializing a local variable which has a cleanup GUARD. If there
6173 are any temporaries used in the initializer INIT of this variable, we
6174 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6175 variable will be cleaned up properly if one of them throws.
6177 Unfortunately, there's no way to express this properly in terms of
6178 nesting, as the regions for the temporaries overlap the region for the
6179 variable itself; if there are two temporaries, the variable needs to be
6180 the first thing destroyed if either of them throws. However, we only
6181 want to run the variable's cleanup if it actually got constructed. So
6182 we need to guard the temporary cleanups with the variable's cleanup if
6183 they are run on the normal path, but not if they are run on the
6184 exceptional path. We implement this by telling
6185 honor_protect_cleanup_actions to strip the variable cleanup from the
6186 exceptional path. */
6189 wrap_temporary_cleanups (tree init
, tree guard
)
6191 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6194 /* Generate code to initialize DECL (a local variable). */
6197 initialize_local_var (tree decl
, tree init
)
6199 tree type
= TREE_TYPE (decl
);
6203 gcc_assert (VAR_P (decl
)
6204 || TREE_CODE (decl
) == RESULT_DECL
);
6205 gcc_assert (!TREE_STATIC (decl
));
6207 if (DECL_SIZE (decl
) == NULL_TREE
)
6209 /* If we used it already as memory, it must stay in memory. */
6210 DECL_INITIAL (decl
) = NULL_TREE
;
6211 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6215 if (type
== error_mark_node
)
6218 /* Compute and store the initial value. */
6219 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6220 if (TREE_USED (type
))
6221 DECL_READ_P (decl
) = 1;
6223 /* Generate a cleanup, if necessary. */
6224 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6226 /* Perform the initialization. */
6229 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6230 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6231 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6233 /* Stick simple initializers in DECL_INITIAL so that
6234 -Wno-init-self works (c++/34772). */
6235 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6236 DECL_INITIAL (decl
) = rinit
;
6238 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6242 warning_at (DECL_SOURCE_LOCATION (decl
),
6244 "reference %qD is initialized with itself", decl
);
6249 int saved_stmts_are_full_exprs_p
;
6251 /* If we're only initializing a single object, guard the
6252 destructors of any temporaries used in its initializer with
6253 its destructor. This isn't right for arrays because each
6254 element initialization is a full-expression. */
6255 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6256 wrap_temporary_cleanups (init
, cleanup
);
6258 gcc_assert (building_stmt_list_p ());
6259 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6260 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6261 finish_expr_stmt (init
);
6262 current_stmt_tree ()->stmts_are_full_exprs_p
=
6263 saved_stmts_are_full_exprs_p
;
6267 /* Set this to 0 so we can tell whether an aggregate which was
6268 initialized was ever used. Don't do this if it has a
6269 destructor, so we don't complain about the 'resource
6270 allocation is initialization' idiom. Now set
6271 attribute((unused)) on types so decls of that type will be
6272 marked used. (see TREE_USED, above.) */
6273 if (TYPE_NEEDS_CONSTRUCTING (type
)
6275 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6276 && DECL_NAME (decl
))
6277 TREE_USED (decl
) = 0;
6278 else if (already_used
)
6279 TREE_USED (decl
) = 1;
6282 finish_decl_cleanup (decl
, cleanup
);
6285 /* DECL is a VAR_DECL for a compiler-generated variable with static
6286 storage duration (like a virtual table) whose initializer is a
6287 compile-time constant. Initialize the variable and provide it to the
6291 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6294 gcc_assert (DECL_ARTIFICIAL (decl
));
6295 init
= build_constructor (TREE_TYPE (decl
), v
);
6296 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6297 DECL_INITIAL (decl
) = init
;
6298 DECL_INITIALIZED_P (decl
) = 1;
6299 determine_visibility (decl
);
6300 layout_var_decl (decl
);
6301 maybe_commonize_var (decl
);
6302 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6305 /* INIT is the initializer for a variable, as represented by the
6306 parser. Returns true iff INIT is type-dependent. */
6309 type_dependent_init_p (tree init
)
6311 if (TREE_CODE (init
) == TREE_LIST
)
6312 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6313 return any_type_dependent_elements_p (init
);
6314 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6315 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6317 vec
<constructor_elt
, va_gc
> *elts
;
6321 elts
= CONSTRUCTOR_ELTS (init
);
6322 nelts
= vec_safe_length (elts
);
6323 for (i
= 0; i
< nelts
; ++i
)
6324 if (type_dependent_init_p ((*elts
)[i
].value
))
6328 /* It must be a simple expression, e.g., int i = 3; */
6329 return type_dependent_expression_p (init
);
6334 /* INIT is the initializer for a variable, as represented by the
6335 parser. Returns true iff INIT is value-dependent. */
6338 value_dependent_init_p (tree init
)
6340 if (TREE_CODE (init
) == TREE_LIST
)
6341 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6342 return any_value_dependent_elements_p (init
);
6343 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6344 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6346 vec
<constructor_elt
, va_gc
> *elts
;
6350 elts
= CONSTRUCTOR_ELTS (init
);
6351 nelts
= vec_safe_length (elts
);
6352 for (i
= 0; i
< nelts
; ++i
)
6353 if (value_dependent_init_p ((*elts
)[i
].value
))
6357 /* It must be a simple expression, e.g., int i = 3; */
6358 return value_dependent_expression_p (init
);
6363 /* Finish processing of a declaration;
6364 install its line number and initial value.
6365 If the length of an array type is not known before,
6366 it must be determined now, from the initial value, or it is an error.
6368 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6369 true, then INIT is an integral constant expression.
6371 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6372 if the (init) syntax was used. */
6375 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6376 tree asmspec_tree
, int flags
)
6379 vec
<tree
, va_gc
> *cleanups
= NULL
;
6380 const char *asmspec
= NULL
;
6381 int was_readonly
= 0;
6382 bool var_definition_p
= false;
6385 if (decl
== error_mark_node
)
6390 error ("assignment (not initialization) in declaration");
6394 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6395 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6396 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6398 type
= TREE_TYPE (decl
);
6399 if (type
== error_mark_node
)
6402 /* If a name was specified, get the string. */
6403 if (at_namespace_scope_p ())
6404 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6405 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6406 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6408 if (current_class_type
6409 && CP_DECL_CONTEXT (decl
) == current_class_type
6410 && TYPE_BEING_DEFINED (current_class_type
)
6411 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6412 && (DECL_INITIAL (decl
) || init
))
6413 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6415 if (TREE_CODE (decl
) != FUNCTION_DECL
6416 && (auto_node
= type_uses_auto (type
)))
6419 if (init
== NULL_TREE
)
6421 if (DECL_LANG_SPECIFIC (decl
)
6422 && DECL_TEMPLATE_INSTANTIATION (decl
)
6423 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6425 /* init is null because we're deferring instantiating the
6426 initializer until we need it. Well, we need it now. */
6427 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6431 error ("declaration of %q#D has no initializer", decl
);
6432 TREE_TYPE (decl
) = error_mark_node
;
6436 if (TREE_CODE (d_init
) == TREE_LIST
)
6437 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6438 tf_warning_or_error
);
6439 d_init
= resolve_nondeduced_context (d_init
);
6440 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6442 if (type
== error_mark_node
)
6444 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6447 if (!ensure_literal_type_for_constexpr_object (decl
))
6448 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6451 && DECL_CLASS_SCOPE_P (decl
)
6452 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6453 check_static_variable_definition (decl
, type
);
6455 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6458 if (init
== ridpointers
[(int)RID_DELETE
])
6460 /* FIXME check this is 1st decl. */
6461 DECL_DELETED_FN (decl
) = 1;
6462 DECL_DECLARED_INLINE_P (decl
) = 1;
6463 DECL_INITIAL (decl
) = error_mark_node
;
6464 FOR_EACH_CLONE (clone
, decl
)
6466 DECL_DELETED_FN (clone
) = 1;
6467 DECL_DECLARED_INLINE_P (clone
) = 1;
6468 DECL_INITIAL (clone
) = error_mark_node
;
6472 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6474 if (defaultable_fn_check (decl
))
6475 DECL_DEFAULTED_FN (decl
) = 1;
6477 DECL_INITIAL (decl
) = NULL_TREE
;
6481 if (init
&& VAR_P (decl
))
6483 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6484 /* If DECL is a reference, then we want to know whether init is a
6485 reference constant; init_const_expr_p as passed tells us whether
6486 it's an rvalue constant. */
6487 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6488 init_const_expr_p
= potential_constant_expression (init
);
6489 if (init_const_expr_p
)
6491 /* Set these flags now for templates. We'll update the flags in
6492 store_init_value for instantiations. */
6493 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6494 if (decl_maybe_constant_var_p (decl
))
6495 TREE_CONSTANT (decl
) = 1;
6499 if (processing_template_decl
)
6501 bool type_dependent_p
;
6503 /* Add this declaration to the statement-tree. */
6504 if (at_function_scope_p ())
6505 add_decl_expr (decl
);
6507 type_dependent_p
= dependent_type_p (type
);
6509 if (check_for_bare_parameter_packs (init
))
6512 DECL_INITIAL (decl
) = NULL_TREE
;
6515 /* Generally, initializers in templates are expanded when the
6516 template is instantiated. But, if DECL is a variable constant
6517 then it can be used in future constant expressions, so its value
6518 must be available. */
6520 if (!VAR_P (decl
) || dependent_type_p (type
))
6521 /* We can't do anything if the decl has dependent type. */;
6523 && init_const_expr_p
6524 && !type_dependent_p
6525 && TREE_CODE (type
) != REFERENCE_TYPE
6526 && decl_maybe_constant_var_p (decl
)
6527 && !type_dependent_init_p (init
)
6528 && !value_dependent_init_p (init
))
6530 /* This variable seems to be a non-dependent constant, so process
6531 its initializer. If check_initializer returns non-null the
6532 initialization wasn't constant after all. */
6534 cleanups
= make_tree_vector ();
6535 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6536 if (init_code
== NULL_TREE
)
6538 release_tree_vector (cleanups
);
6540 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6542 /* Deduce array size even if the initializer is dependent. */
6543 maybe_deduce_size_from_array_init (decl
, init
);
6544 /* And complain about multiple initializers. */
6545 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6546 && !MAYBE_CLASS_TYPE_P (type
))
6547 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6548 tf_warning_or_error
);
6552 DECL_INITIAL (decl
) = init
;
6556 /* Just store non-static data member initializers for later. */
6557 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6558 DECL_INITIAL (decl
) = init
;
6560 /* Take care of TYPE_DECLs up front. */
6561 if (TREE_CODE (decl
) == TYPE_DECL
)
6563 if (type
!= error_mark_node
6564 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6566 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6567 warning (0, "shadowing previous type declaration of %q#D", decl
);
6568 set_identifier_type_value (DECL_NAME (decl
), decl
);
6571 /* If we have installed this as the canonical typedef for this
6572 type, and that type has not been defined yet, delay emitting
6573 the debug information for it, as we will emit it later. */
6574 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6575 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6576 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6578 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6583 /* A reference will be modified here, as it is initialized. */
6584 if (! DECL_EXTERNAL (decl
)
6585 && TREE_READONLY (decl
)
6586 && TREE_CODE (type
) == REFERENCE_TYPE
)
6589 TREE_READONLY (decl
) = 0;
6594 /* If this is a local variable that will need a mangled name,
6595 register it now. We must do this before processing the
6596 initializer for the variable, since the initialization might
6597 require a guard variable, and since the mangled name of the
6598 guard variable will depend on the mangled name of this
6600 if (DECL_FUNCTION_SCOPE_P (decl
)
6601 && TREE_STATIC (decl
)
6602 && !DECL_ARTIFICIAL (decl
))
6604 push_local_name (decl
);
6605 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6606 || DECL_DESTRUCTOR_P (current_function_decl
))
6607 /* Normally local_decls is populated during GIMPLE lowering,
6608 but [cd]tors are never actually compiled directly. We need
6609 to put statics on the list so we can deal with the label
6610 address extension. FIXME. */
6611 add_local_decl (cfun
, decl
);
6614 /* Convert the initializer to the type of DECL, if we have not
6615 already initialized DECL. */
6616 if (!DECL_INITIALIZED_P (decl
)
6617 /* If !DECL_EXTERNAL then DECL is being defined. In the
6618 case of a static data member initialized inside the
6619 class-specifier, there can be an initializer even if DECL
6620 is *not* defined. */
6621 && (!DECL_EXTERNAL (decl
) || init
))
6623 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6626 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6627 /* Allow libjava/prims.cc define primitive classes. */
6628 if (init
!= NULL_TREE
6629 || jclass
== NULL_TREE
6630 || TREE_CODE (jclass
) != TYPE_DECL
6631 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6632 || !same_type_ignoring_top_level_qualifiers_p
6633 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6634 error ("Java object %qD not allocated with %<new%>", decl
);
6637 cleanups
= make_tree_vector ();
6638 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6644 The memory occupied by any object of static storage
6645 duration is zero-initialized at program startup before
6646 any other initialization takes place.
6648 We cannot create an appropriate initializer until after
6649 the type of DECL is finalized. If DECL_INITIAL is set,
6650 then the DECL is statically initialized, and any
6651 necessary zero-initialization has already been performed. */
6652 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6653 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6654 /*nelts=*/NULL_TREE
,
6655 /*static_storage_p=*/true);
6656 /* Remember that the initialization for this variable has
6658 DECL_INITIALIZED_P (decl
) = 1;
6659 /* This declaration is the definition of this variable,
6660 unless we are initializing a static data member within
6661 the class specifier. */
6662 if (!DECL_EXTERNAL (decl
))
6663 var_definition_p
= true;
6665 /* If the variable has an array type, lay out the type, even if
6666 there is no initializer. It is valid to index through the
6667 array, and we must get TYPE_ALIGN set correctly on the array
6669 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6672 if (TREE_STATIC (decl
)
6673 && !at_function_scope_p ()
6674 && current_function_decl
== NULL
)
6675 /* So decl is a global variable or a static member of a
6676 non local class. Record the types it uses
6677 so that we can decide later to emit debug info for them. */
6678 record_types_used_by_current_var_decl (decl
);
6680 else if (TREE_CODE (decl
) == FIELD_DECL
6681 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6682 error ("non-static data member %qD has Java class type", decl
);
6684 /* Add this declaration to the statement-tree. This needs to happen
6685 after the call to check_initializer so that the DECL_EXPR for a
6686 reference temp is added before the DECL_EXPR for the reference itself. */
6687 if (DECL_FUNCTION_SCOPE_P (decl
))
6689 /* If we're building a variable sized type, and we might be
6690 reachable other than via the top of the current binding
6691 level, then create a new BIND_EXPR so that we deallocate
6692 the object at the right time. */
6695 && !TREE_CONSTANT (DECL_SIZE (decl
))
6696 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6699 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6700 TREE_SIDE_EFFECTS (bind
) = 1;
6702 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6704 add_decl_expr (decl
);
6707 /* Let the middle end know about variables and functions -- but not
6708 static data members in uninstantiated class templates. */
6709 if (VAR_OR_FUNCTION_DECL_P (decl
))
6713 layout_var_decl (decl
);
6714 maybe_commonize_var (decl
);
6717 /* This needs to happen after the linkage is set. */
6718 determine_visibility (decl
);
6720 if (var_definition_p
&& TREE_STATIC (decl
))
6722 /* If a TREE_READONLY variable needs initialization
6723 at runtime, it is no longer readonly and we need to
6724 avoid MEM_READONLY_P being set on RTL created for it. */
6727 if (TREE_READONLY (decl
))
6728 TREE_READONLY (decl
) = 0;
6731 else if (was_readonly
)
6732 TREE_READONLY (decl
) = 1;
6734 /* Likewise if it needs destruction. */
6735 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6736 TREE_READONLY (decl
) = 0;
6739 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6741 /* Check for abstractness of the type. Notice that there is no
6742 need to strip array types here since the check for those types
6743 is already done within create_array_type_for_decl. */
6744 abstract_virtuals_error (decl
, type
);
6746 if (TREE_TYPE (decl
) == error_mark_node
)
6747 /* No initialization required. */
6749 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6753 if (init
== ridpointers
[(int)RID_DEFAULT
])
6755 /* An out-of-class default definition is defined at
6756 the point where it is explicitly defaulted. */
6757 if (DECL_DELETED_FN (decl
))
6758 maybe_explain_implicit_delete (decl
);
6759 else if (DECL_INITIAL (decl
) == error_mark_node
)
6760 synthesize_method (decl
);
6763 error ("function %q#D is initialized like a variable", decl
);
6765 /* else no initialization required. */
6767 else if (DECL_EXTERNAL (decl
)
6768 && ! (DECL_LANG_SPECIFIC (decl
)
6769 && DECL_NOT_REALLY_EXTERN (decl
)))
6772 DECL_INITIAL (decl
) = init
;
6774 /* A variable definition. */
6775 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6776 /* Initialize the local variable. */
6777 initialize_local_var (decl
, init
);
6779 /* If a variable is defined, and then a subsequent
6780 definition with external linkage is encountered, we will
6781 get here twice for the same variable. We want to avoid
6782 calling expand_static_init more than once. For variables
6783 that are not static data members, we can call
6784 expand_static_init only when we actually process the
6785 initializer. It is not legal to redeclare a static data
6786 member, so this issue does not arise in that case. */
6787 else if (var_definition_p
&& TREE_STATIC (decl
))
6788 expand_static_init (decl
, init
);
6791 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6792 reference, insert it in the statement-tree now. */
6796 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6797 push_cleanup (decl
, t
, false);
6798 release_tree_vector (cleanups
);
6802 TREE_READONLY (decl
) = 1;
6804 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6807 /* Returns a declaration for a VAR_DECL as if:
6809 extern "C" TYPE NAME;
6811 had been seen. Used to create compiler-generated global
6815 declare_global_var (tree name
, tree type
)
6819 push_to_top_level ();
6820 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6821 TREE_PUBLIC (decl
) = 1;
6822 DECL_EXTERNAL (decl
) = 1;
6823 DECL_ARTIFICIAL (decl
) = 1;
6824 /* If the user has explicitly declared this variable (perhaps
6825 because the code we are compiling is part of a low-level runtime
6826 library), then it is possible that our declaration will be merged
6827 with theirs by pushdecl. */
6828 decl
= pushdecl (decl
);
6829 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6830 pop_from_top_level ();
6835 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6836 if "__cxa_atexit" is not being used) corresponding to the function
6837 to be called when the program exits. */
6840 get_atexit_fn_ptr_type (void)
6844 if (!atexit_fn_ptr_type_node
)
6847 if (flag_use_cxa_atexit
6848 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6849 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6850 arg_type
= ptr_type_node
;
6852 /* The parameter to "atexit" is "void (*)(void)". */
6853 arg_type
= NULL_TREE
;
6855 fn_type
= build_function_type_list (void_type_node
,
6856 arg_type
, NULL_TREE
);
6857 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6860 return atexit_fn_ptr_type_node
;
6863 /* Returns a pointer to the `atexit' function. Note that if
6864 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6865 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6868 get_atexit_node (void)
6874 bool use_aeabi_atexit
;
6879 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6881 /* The declaration for `__cxa_atexit' is:
6883 int __cxa_atexit (void (*)(void *), void *, void *)
6885 We build up the argument types and then the function type
6887 tree argtype0
, argtype1
, argtype2
;
6889 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6890 /* First, build the pointer-to-function type for the first
6892 fn_ptr_type
= get_atexit_fn_ptr_type ();
6893 /* Then, build the rest of the argument types. */
6894 argtype2
= ptr_type_node
;
6895 if (use_aeabi_atexit
)
6897 argtype1
= fn_ptr_type
;
6898 argtype0
= ptr_type_node
;
6902 argtype1
= ptr_type_node
;
6903 argtype0
= fn_ptr_type
;
6905 /* And the final __cxa_atexit type. */
6906 fn_type
= build_function_type_list (integer_type_node
,
6907 argtype0
, argtype1
, argtype2
,
6909 if (use_aeabi_atexit
)
6910 name
= "__aeabi_atexit";
6912 name
= "__cxa_atexit";
6916 /* The declaration for `atexit' is:
6918 int atexit (void (*)());
6920 We build up the argument types and then the function type
6922 fn_ptr_type
= get_atexit_fn_ptr_type ();
6923 /* Build the final atexit type. */
6924 fn_type
= build_function_type_list (integer_type_node
,
6925 fn_ptr_type
, NULL_TREE
);
6929 /* Now, build the function declaration. */
6930 push_lang_context (lang_name_c
);
6931 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6932 mark_used (atexit_fndecl
);
6933 pop_lang_context ();
6934 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6939 /* Like get_atexit_node, but for thread-local cleanups. */
6942 get_thread_atexit_node (void)
6944 /* The declaration for `__cxa_thread_atexit' is:
6946 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6947 tree fn_type
= build_function_type_list (integer_type_node
,
6948 get_atexit_fn_ptr_type (),
6949 ptr_type_node
, ptr_type_node
,
6952 /* Now, build the function declaration. */
6953 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6954 ECF_LEAF
| ECF_NOTHROW
);
6955 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6958 /* Returns the __dso_handle VAR_DECL. */
6961 get_dso_handle_node (void)
6963 if (dso_handle_node
)
6964 return dso_handle_node
;
6966 /* Declare the variable. */
6967 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6970 #ifdef HAVE_GAS_HIDDEN
6971 if (dso_handle_node
!= error_mark_node
)
6973 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6974 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6978 return dso_handle_node
;
6981 /* Begin a new function with internal linkage whose job will be simply
6982 to destroy some particular variable. */
6984 static GTY(()) int start_cleanup_cnt
;
6987 start_cleanup_fn (void)
6992 bool use_cxa_atexit
= flag_use_cxa_atexit
6993 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6995 push_to_top_level ();
6997 /* No need to mangle this. */
6998 push_lang_context (lang_name_c
);
7000 /* Build the name of the function. */
7001 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
7002 /* Build the function declaration. */
7003 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
7004 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
7005 /* It's a function with internal linkage, generated by the
7007 TREE_PUBLIC (fndecl
) = 0;
7008 DECL_ARTIFICIAL (fndecl
) = 1;
7009 /* Make the function `inline' so that it is only emitted if it is
7010 actually needed. It is unlikely that it will be inlined, since
7011 it is only called via a function pointer, but we avoid unnecessary
7012 emissions this way. */
7013 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7014 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7015 /* Build the parameter. */
7020 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7021 DECL_CONTEXT (parmdecl
) = fndecl
;
7022 TREE_USED (parmdecl
) = 1;
7023 DECL_READ_P (parmdecl
) = 1;
7024 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7028 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7030 pop_lang_context ();
7032 return current_function_decl
;
7035 /* Finish the cleanup function begun by start_cleanup_fn. */
7038 end_cleanup_fn (void)
7040 expand_or_defer_fn (finish_function (0));
7042 pop_from_top_level ();
7045 /* Generate code to handle the destruction of DECL, an object with
7046 static storage duration. */
7049 register_dtor_fn (tree decl
)
7056 bool ob_parm
, dso_parm
, use_dtor
;
7057 tree arg0
, arg1
, arg2
;
7060 type
= TREE_TYPE (decl
);
7061 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7064 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7065 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7066 destructor to "__cxa_atexit"; we don't have to build a temporary
7067 function to do the cleanup. */
7068 dso_parm
= (flag_use_cxa_atexit
7069 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7070 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7071 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7076 /* Find the destructor. */
7077 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7078 gcc_assert (idx
>= 0);
7079 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7080 /* Make sure it is accessible. */
7081 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7082 tf_warning_or_error
);
7086 /* Call build_cleanup before we enter the anonymous function so
7087 that any access checks will be done relative to the current
7088 scope, rather than the scope of the anonymous function. */
7089 build_cleanup (decl
);
7091 /* Now start the function. */
7092 cleanup
= start_cleanup_fn ();
7094 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7095 to the original function, rather than the anonymous one. That
7096 will make the back end think that nested functions are in use,
7097 which causes confusion. */
7098 push_deferring_access_checks (dk_no_check
);
7099 fcall
= build_cleanup (decl
);
7100 pop_deferring_access_checks ();
7102 /* Create the body of the anonymous function. */
7103 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7104 finish_expr_stmt (fcall
);
7105 finish_compound_stmt (compound_stmt
);
7109 /* Call atexit with the cleanup function. */
7110 mark_used (cleanup
);
7111 cleanup
= build_address (cleanup
);
7113 if (DECL_THREAD_LOCAL_P (decl
))
7114 atex_node
= get_thread_atexit_node ();
7116 atex_node
= get_atexit_node ();
7120 /* We must convert CLEANUP to the type that "__cxa_atexit"
7122 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7123 /* "__cxa_atexit" will pass the address of DECL to the
7124 cleanup function. */
7126 addr
= build_address (decl
);
7127 /* The declared type of the parameter to "__cxa_atexit" is
7128 "void *". For plain "T*", we could just let the
7129 machinery in cp_build_function_call convert it -- but if the
7130 type is "cv-qualified T *", then we need to convert it
7131 before passing it in, to avoid spurious errors. */
7132 addr
= build_nop (ptr_type_node
, addr
);
7135 /* Since the cleanup functions we build ignore the address
7136 they're given, there's no reason to pass the actual address
7137 in, and, in general, it's cheaper to pass NULL than any
7139 addr
= null_pointer_node
;
7142 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7143 tf_warning_or_error
);
7145 /* Just pass NULL to the dso handle parm if we don't actually
7146 have a DSO handle on this target. */
7147 arg2
= null_pointer_node
;
7153 if (!DECL_THREAD_LOCAL_P (decl
)
7154 && targetm
.cxx
.use_aeabi_atexit ())
7170 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7171 arg0
, arg1
, arg2
, NULL_TREE
);
7174 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7175 is its initializer. Generate code to handle the construction
7176 and destruction of DECL. */
7179 expand_static_init (tree decl
, tree init
)
7181 gcc_assert (VAR_P (decl
));
7182 gcc_assert (TREE_STATIC (decl
));
7184 /* Some variables require no dynamic initialization. */
7186 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7188 /* Make sure the destructor is callable. */
7189 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7193 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7194 && !DECL_FUNCTION_SCOPE_P (decl
))
7197 error ("non-local variable %qD declared %<__thread%> "
7198 "needs dynamic initialization", decl
);
7200 error ("non-local variable %qD declared %<__thread%> "
7201 "has a non-trivial destructor", decl
);
7202 static bool informed
;
7205 inform (DECL_SOURCE_LOCATION (decl
),
7206 "C++11 %<thread_local%> allows dynamic initialization "
7213 if (DECL_FUNCTION_SCOPE_P (decl
))
7215 /* Emit code to perform this initialization but once. */
7216 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7217 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7218 tree guard
, guard_addr
;
7220 /* We don't need thread-safety code for thread-local vars. */
7221 bool thread_guard
= (flag_threadsafe_statics
7222 && !DECL_THREAD_LOCAL_P (decl
));
7224 /* Emit code to perform this initialization but once. This code
7227 static <type> guard;
7228 if (!guard.first_byte) {
7229 if (__cxa_guard_acquire (&guard)) {
7232 // Do initialization.
7233 flag = true; __cxa_guard_release (&guard);
7234 // Register variable for destruction at end of program.
7236 if (!flag) __cxa_guard_abort (&guard);
7240 Note that the `flag' variable is only set to 1 *after* the
7241 initialization is complete. This ensures that an exception,
7242 thrown during the construction, will cause the variable to
7243 reinitialized when we pass through this code again, as per:
7247 If the initialization exits by throwing an exception, the
7248 initialization is not complete, so it will be tried again
7249 the next time control enters the declaration.
7251 This process should be thread-safe, too; multiple threads
7252 should not be able to initialize the variable more than
7255 /* Create the guard variable. */
7256 guard
= get_guard (decl
);
7258 /* This optimization isn't safe on targets with relaxed memory
7259 consistency. On such targets we force synchronization in
7260 __cxa_guard_acquire. */
7261 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7263 /* Begin the conditional initialization. */
7264 if_stmt
= begin_if_stmt ();
7265 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7266 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7271 tree vfntype
= NULL_TREE
;
7272 tree acquire_name
, release_name
, abort_name
;
7273 tree acquire_fn
, release_fn
, abort_fn
;
7274 guard_addr
= build_address (guard
);
7276 acquire_name
= get_identifier ("__cxa_guard_acquire");
7277 release_name
= get_identifier ("__cxa_guard_release");
7278 abort_name
= get_identifier ("__cxa_guard_abort");
7279 acquire_fn
= identifier_global_value (acquire_name
);
7280 release_fn
= identifier_global_value (release_name
);
7281 abort_fn
= identifier_global_value (abort_name
);
7283 acquire_fn
= push_library_fn
7284 (acquire_name
, build_function_type_list (integer_type_node
,
7285 TREE_TYPE (guard_addr
),
7287 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7288 if (!release_fn
|| !abort_fn
)
7289 vfntype
= build_function_type_list (void_type_node
,
7290 TREE_TYPE (guard_addr
),
7293 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7294 ECF_NOTHROW
| ECF_LEAF
);
7296 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7297 ECF_NOTHROW
| ECF_LEAF
);
7299 inner_if_stmt
= begin_if_stmt ();
7300 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7303 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7304 begin
= get_target_expr (boolean_false_node
);
7305 flag
= TARGET_EXPR_SLOT (begin
);
7307 TARGET_EXPR_CLEANUP (begin
)
7308 = build3 (COND_EXPR
, void_type_node
, flag
,
7310 build_call_n (abort_fn
, 1, guard_addr
));
7311 CLEANUP_EH_ONLY (begin
) = 1;
7313 /* Do the initialization itself. */
7314 init
= add_stmt_to_compound (begin
, init
);
7315 init
= add_stmt_to_compound
7316 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7317 init
= add_stmt_to_compound
7318 (init
, build_call_n (release_fn
, 1, guard_addr
));
7321 init
= add_stmt_to_compound (init
, set_guard (guard
));
7323 /* Use atexit to register a function for destroying this static
7325 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7327 finish_expr_stmt (init
);
7331 finish_compound_stmt (inner_then_clause
);
7332 finish_then_clause (inner_if_stmt
);
7333 finish_if_stmt (inner_if_stmt
);
7336 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7338 finish_compound_stmt (then_clause
);
7339 finish_then_clause (if_stmt
);
7340 finish_if_stmt (if_stmt
);
7343 else if (DECL_THREAD_LOCAL_P (decl
))
7344 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7346 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7350 /* Make TYPE a complete type based on INITIAL_VALUE.
7351 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7352 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7353 3 if the initializer list is empty (in pedantic mode). */
7356 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7359 tree type
, elt_type
;
7361 /* Don't get confused by a CONSTRUCTOR for some other type. */
7362 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7363 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7368 unsigned HOST_WIDE_INT i
;
7371 /* An array of character type can be initialized from a
7372 brace-enclosed string constant.
7374 FIXME: this code is duplicated from reshape_init. Probably
7375 we should just call reshape_init here? */
7376 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7377 && TREE_CODE (initial_value
) == CONSTRUCTOR
7378 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7380 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7381 tree value
= (*v
)[0].value
;
7383 if (TREE_CODE (value
) == STRING_CST
7384 && v
->length () == 1)
7385 initial_value
= value
;
7388 /* If any of the elements are parameter packs, we can't actually
7389 complete this type now because the array size is dependent. */
7390 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7392 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7395 if (PACK_EXPANSION_P (value
))
7401 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7403 /* We can create the array before the element type is complete, which
7404 means that we didn't have these two bits set in the original type
7405 either. In completing the type, we are expected to propagate these
7406 bits. See also complete_type which does the same thing for arrays
7409 if (TYPE_DOMAIN (type
))
7411 elt_type
= TREE_TYPE (type
);
7412 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7413 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7414 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7420 /* As above, but either give an error or reject zero-size arrays, depending
7424 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7425 bool do_default
, tsubst_flags_t complain
)
7428 bool sfinae
= !(complain
& tf_error
);
7429 /* In SFINAE context we can't be lenient about zero-size arrays. */
7432 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7438 /* Not an error. */;
7439 else if (failure
== 1)
7440 error ("initializer fails to determine size of %qT", *ptype
);
7441 else if (failure
== 2)
7444 error ("array size missing in %qT", *ptype
);
7446 else if (failure
== 3)
7447 error ("zero-size array %qT", *ptype
);
7448 *ptype
= error_mark_node
;
7453 /* Return zero if something is declared to be a member of type
7454 CTYPE when in the context of CUR_TYPE. STRING is the error
7455 message to print in that case. Otherwise, quietly return 1. */
7458 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7460 if (ctype
&& ctype
!= cur_type
)
7462 if (flags
== DTOR_FLAG
)
7463 error ("destructor for alien class %qT cannot be a member", ctype
);
7465 error ("constructor for alien class %qT cannot be a member", ctype
);
7471 /* Subroutine of `grokdeclarator'. */
7473 /* Generate errors possibly applicable for a given set of specifiers.
7474 This is for ARM $7.1.2. */
7477 bad_specifiers (tree object
,
7478 enum bad_spec_place type
,
7489 error ("%qD declared as a %<virtual%> variable", object
);
7491 error ("%qD declared as an %<inline%> variable", object
);
7493 error ("%<const%> and %<volatile%> function specifiers on "
7494 "%qD invalid in variable declaration", object
);
7498 error ("%qD declared as a %<virtual%> parameter", object
);
7500 error ("%qD declared as an %<inline%> parameter", object
);
7502 error ("%<const%> and %<volatile%> function specifiers on "
7503 "%qD invalid in parameter declaration", object
);
7507 error ("%qD declared as a %<virtual%> type", object
);
7509 error ("%qD declared as an %<inline%> type", object
);
7511 error ("%<const%> and %<volatile%> function specifiers on "
7512 "%qD invalid in type declaration", object
);
7516 error ("%qD declared as a %<virtual%> field", object
);
7518 error ("%qD declared as an %<inline%> field", object
);
7520 error ("%<const%> and %<volatile%> function specifiers on "
7521 "%qD invalid in field declaration", object
);
7527 error ("%q+D declared as a friend", object
);
7529 && (TREE_CODE (object
) == TYPE_DECL
7530 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7531 && !TYPE_REFFN_P (TREE_TYPE (object
))
7532 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7533 error ("%q+D declared with an exception specification", object
);
7536 /* DECL is a member function or static data member and is presently
7537 being defined. Check that the definition is taking place in a
7541 check_class_member_definition_namespace (tree decl
)
7543 /* These checks only apply to member functions and static data
7545 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7546 /* We check for problems with specializations in pt.c in
7547 check_specialization_namespace, where we can issue better
7549 if (processing_specialization
)
7551 /* There are no restrictions on the placement of
7552 explicit instantiations. */
7553 if (processing_explicit_instantiation
)
7557 A member function definition that appears outside of the
7558 class definition shall appear in a namespace scope enclosing
7559 the class definition.
7563 The definition for a static data member shall appear in a
7564 namespace scope enclosing the member's class definition. */
7565 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7566 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7567 decl
, DECL_CONTEXT (decl
));
7570 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7571 METHOD_TYPE for a non-static member function; QUALS are the
7572 cv-qualifiers that apply to the function. */
7575 build_this_parm (tree type
, cp_cv_quals quals
)
7580 cp_cv_quals this_quals
;
7582 if (CLASS_TYPE_P (type
))
7585 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7586 this_type
= build_pointer_type (this_type
);
7589 this_type
= type_of_this_parm (type
);
7590 /* The `this' parameter is implicitly `const'; it cannot be
7592 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7593 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7594 parm
= build_artificial_parm (this_identifier
, qual_type
);
7595 cp_apply_type_quals_to_decl (this_quals
, parm
);
7599 /* DECL is a static member function. Complain if it was declared
7600 with function-cv-quals. */
7603 check_static_quals (tree decl
, cp_cv_quals quals
)
7605 if (quals
!= TYPE_UNQUALIFIED
)
7606 error ("static member function %q#D declared with type qualifiers",
7610 /* Helper function. Replace the temporary this parameter injected
7611 during cp_finish_omp_declare_simd with the real this parameter. */
7614 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7616 tree this_parm
= (tree
) data
;
7617 if (TREE_CODE (*tp
) == PARM_DECL
7618 && DECL_NAME (*tp
) == this_identifier
7619 && *tp
!= this_parm
)
7621 else if (TYPE_P (*tp
))
7626 /* CTYPE is class type, or null if non-class.
7627 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7629 DECLARATOR is the function's name.
7630 PARMS is a chain of PARM_DECLs for the function.
7631 VIRTUALP is truthvalue of whether the function is virtual or not.
7632 FLAGS are to be passed through to `grokclassfn'.
7633 QUALS are qualifiers indicating whether the function is `const'
7635 RAISES is a list of exceptions that this function can raise.
7636 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7637 not look, and -1 if we should not call `grokclassfn' at all.
7639 SFK is the kind of special function (if any) for the new function.
7641 Returns `NULL_TREE' if something goes wrong, after issuing
7642 applicable error messages. */
7645 grokfndecl (tree ctype
,
7649 tree orig_declarator
,
7651 enum overload_flags flags
,
7653 cp_ref_qualifier rqual
,
7660 special_function_kind sfk
,
7665 location_t location
)
7668 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7672 type
= build_ref_qualified_type (type
, rqual
);
7674 type
= build_exception_variant (type
, raises
);
7676 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7678 /* If we have an explicit location, use it, otherwise use whatever
7679 build_lang_decl used (probably input_location). */
7680 if (location
!= UNKNOWN_LOCATION
)
7681 DECL_SOURCE_LOCATION (decl
) = location
;
7683 if (TREE_CODE (type
) == METHOD_TYPE
)
7686 parm
= build_this_parm (type
, quals
);
7687 DECL_CHAIN (parm
) = parms
;
7690 DECL_ARGUMENTS (decl
) = parms
;
7691 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7692 DECL_CONTEXT (t
) = decl
;
7693 /* Propagate volatile out from type to decl. */
7694 if (TYPE_VOLATILE (type
))
7695 TREE_THIS_VOLATILE (decl
) = 1;
7697 /* Setup decl according to sfk. */
7700 case sfk_constructor
:
7701 case sfk_copy_constructor
:
7702 case sfk_move_constructor
:
7703 DECL_CONSTRUCTOR_P (decl
) = 1;
7705 case sfk_destructor
:
7706 DECL_DESTRUCTOR_P (decl
) = 1;
7712 /* If pointers to member functions use the least significant bit to
7713 indicate whether a function is virtual, ensure a pointer
7714 to this function will have that bit clear. */
7715 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7716 && TREE_CODE (type
) == METHOD_TYPE
7717 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7718 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7721 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7725 ("defining explicit specialization %qD in friend declaration",
7729 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7730 tree args
= TREE_OPERAND (orig_declarator
, 1);
7732 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7734 /* Something like `template <class T> friend void f<T>()'. */
7735 error ("invalid use of template-id %qD in declaration "
7736 "of primary template",
7742 /* A friend declaration of the form friend void f<>(). Record
7743 the information in the TEMPLATE_ID_EXPR. */
7744 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7746 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7747 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7749 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7750 if (TREE_PURPOSE (t
)
7751 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7753 error ("default arguments are not allowed in declaration "
7754 "of friend template specialization %qD",
7760 error ("%<inline%> is not allowed in declaration of friend "
7761 "template specialization %qD",
7764 error ("%<constexpr%> is not allowed in declaration of friend "
7765 "template specialization %qD",
7772 /* If this decl has namespace scope, set that up. */
7774 set_decl_namespace (decl
, in_namespace
, friendp
);
7776 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7778 /* `main' and builtins have implicit 'C' linkage. */
7779 if ((MAIN_NAME_P (declarator
)
7780 || (IDENTIFIER_LENGTH (declarator
) > 10
7781 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7782 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7783 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7784 || (targetcm
.cxx_implicit_extern_c
7785 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7786 && current_lang_name
== lang_name_cplusplus
7787 && ctype
== NULL_TREE
7788 && DECL_FILE_SCOPE_P (decl
))
7789 SET_DECL_LANGUAGE (decl
, lang_c
);
7791 /* Should probably propagate const out from type to decl I bet (mrs). */
7794 DECL_STATIC_FUNCTION_P (decl
) = 1;
7795 DECL_CONTEXT (decl
) = ctype
;
7799 DECL_DELETED_FN (decl
) = 1;
7803 DECL_CONTEXT (decl
) = ctype
;
7805 check_class_member_definition_namespace (decl
);
7808 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7810 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7811 error ("cannot declare %<::main%> to be a template");
7813 error ("cannot declare %<::main%> to be inline");
7815 error ("cannot declare %<::main%> to be constexpr");
7817 error ("cannot declare %<::main%> to be static");
7822 /* Members of anonymous types and local classes have no linkage; make
7823 them internal. If a typedef is made later, this will be changed. */
7824 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7825 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7828 if (publicp
&& cxx_dialect
== cxx98
)
7830 /* [basic.link]: A name with no linkage (notably, the name of a class
7831 or enumeration declared in a local scope) shall not be used to
7832 declare an entity with linkage.
7834 DR 757 relaxes this restriction for C++0x. */
7835 no_linkage_error (decl
);
7838 TREE_PUBLIC (decl
) = publicp
;
7841 DECL_INTERFACE_KNOWN (decl
) = 1;
7842 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7845 /* If the declaration was declared inline, mark it as such. */
7848 DECL_DECLARED_INLINE_P (decl
) = 1;
7850 DECL_COMDAT (decl
) = 1;
7853 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7855 DECL_EXTERNAL (decl
) = 1;
7856 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7861 ? G_("static member function %qD cannot have cv-qualifier")
7862 : G_("non-member function %qD cannot have cv-qualifier"),
7864 quals
= TYPE_UNQUALIFIED
;
7870 ? G_("static member function %qD cannot have ref-qualifier")
7871 : G_("non-member function %qD cannot have ref-qualifier"),
7873 rqual
= REF_QUAL_NONE
;
7877 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7878 && !grok_op_properties (decl
, /*complain=*/true))
7880 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7882 bool long_long_unsigned_p
;
7884 const char *suffix
= NULL
;
7885 /* [over.literal]/6: Literal operators shall not have C linkage. */
7886 if (DECL_LANGUAGE (decl
) == lang_c
)
7888 error ("literal operator with C linkage");
7892 if (DECL_NAMESPACE_SCOPE_P (decl
))
7894 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7897 error ("%qD has invalid argument list", decl
);
7901 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7902 if (long_long_unsigned_p
)
7904 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7905 warning (0, "integer suffix %<%s%>"
7906 " shadowed by implementation", suffix
);
7908 else if (long_double_p
)
7910 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7911 warning (0, "floating point suffix %<%s%>"
7912 " shadowed by implementation", suffix
);
7917 error ("%qD must be a non-member function", decl
);
7923 /* Make the init_value nonzero so pushdecl knows this is not
7924 tentative. error_mark_node is replaced later with the BLOCK. */
7925 DECL_INITIAL (decl
) = error_mark_node
;
7927 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7928 TREE_NOTHROW (decl
) = 1;
7930 if (flag_openmp
|| flag_cilkplus
)
7932 /* Adjust "omp declare simd" attributes. */
7933 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7937 for (attr
= ods
; attr
;
7938 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7940 if (TREE_CODE (type
) == METHOD_TYPE
)
7941 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7942 DECL_ARGUMENTS (decl
), NULL
);
7943 if (TREE_VALUE (attr
) != NULL_TREE
)
7945 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7946 cl
= c_omp_declare_simd_clauses_to_numbers
7947 (DECL_ARGUMENTS (decl
), cl
);
7949 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7951 TREE_VALUE (attr
) = NULL_TREE
;
7957 /* Caller will do the rest of this. */
7961 if (ctype
!= NULL_TREE
)
7962 grokclassfn (ctype
, decl
, flags
);
7965 if (cxx_dialect
>= cxx11
7966 && DECL_DESTRUCTOR_P (decl
)
7967 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7968 && !processing_template_decl
)
7969 deduce_noexcept_on_destructor (decl
);
7971 decl
= check_explicit_specialization (orig_declarator
, decl
,
7974 4 * (friendp
!= 0));
7975 if (decl
== error_mark_node
)
7978 if (DECL_STATIC_FUNCTION_P (decl
))
7979 check_static_quals (decl
, quals
);
7983 cplus_decl_attributes (&decl
, *attrlist
, 0);
7984 *attrlist
= NULL_TREE
;
7987 /* Check main's type after attributes have been applied. */
7988 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7990 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7993 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7995 error ("%<::main%> must return %<int%>");
7996 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7997 TREE_TYPE (decl
) = newtype
;
8000 check_main_parameter_types (decl
);
8003 if (ctype
!= NULL_TREE
8004 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
8007 tree old_decl
= check_classfn (ctype
, decl
,
8008 (processing_template_decl
8009 > template_class_depth (ctype
))
8010 ? current_template_parms
8013 if (old_decl
== error_mark_node
)
8021 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8022 /* Because grokfndecl is always supposed to return a
8023 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8024 here. We depend on our callers to figure out that its
8025 really a template that's being returned. */
8026 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8028 if (DECL_STATIC_FUNCTION_P (old_decl
)
8029 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8031 /* Remove the `this' parm added by grokclassfn. */
8032 revert_static_member_fn (decl
);
8033 check_static_quals (decl
, quals
);
8035 if (DECL_ARTIFICIAL (old_decl
))
8037 error ("definition of implicitly-declared %qD", old_decl
);
8040 else if (DECL_DEFAULTED_FN (old_decl
))
8042 error ("definition of explicitly-defaulted %q+D", decl
);
8043 error ("%q+#D explicitly defaulted here", old_decl
);
8047 /* Since we've smashed OLD_DECL to its
8048 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8049 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8050 decl
= DECL_TEMPLATE_RESULT (decl
);
8052 /* Attempt to merge the declarations. This can fail, in
8053 the case of some invalid specialization declarations. */
8054 pushed_scope
= push_scope (ctype
);
8055 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8057 pop_scope (pushed_scope
);
8060 error ("no %q#D member function declared in class %qT",
8064 if (ok
== error_mark_node
)
8070 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8073 if (ctype
== NULL_TREE
|| check
)
8077 DECL_VIRTUAL_P (decl
) = 1;
8082 /* decl is a FUNCTION_DECL.
8083 specifiers are the parsed virt-specifiers.
8085 Set flags to reflect the virt-specifiers.
8090 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8092 if (decl
== NULL_TREE
)
8094 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8095 DECL_OVERRIDE_P (decl
) = 1;
8096 if (specifiers
& VIRT_SPEC_FINAL
)
8097 DECL_FINAL_P (decl
) = 1;
8101 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8102 the linkage that DECL will receive in the object file. */
8105 set_linkage_for_static_data_member (tree decl
)
8107 /* A static data member always has static storage duration and
8108 external linkage. Note that static data members are forbidden in
8109 local classes -- the only situation in which a class has
8110 non-external linkage. */
8111 TREE_PUBLIC (decl
) = 1;
8112 TREE_STATIC (decl
) = 1;
8113 /* For non-template classes, static data members are always put
8114 out in exactly those files where they are defined, just as
8115 with ordinary namespace-scope variables. */
8116 if (!processing_template_decl
)
8117 DECL_INTERFACE_KNOWN (decl
) = 1;
8120 /* Create a VAR_DECL named NAME with the indicated TYPE.
8122 If SCOPE is non-NULL, it is the class type or namespace containing
8123 the variable. If SCOPE is NULL, the variable should is created in
8124 the innermost enclosing scope. */
8127 grokvardecl (tree type
,
8129 tree orig_declarator
,
8130 const cp_decl_specifier_seq
*declspecs
,
8137 tree explicit_scope
;
8139 gcc_assert (!name
|| identifier_p (name
));
8141 /* Compute the scope in which to place the variable, but remember
8142 whether or not that scope was explicitly specified by the user. */
8143 explicit_scope
= scope
;
8146 /* An explicit "extern" specifier indicates a namespace-scope
8148 if (declspecs
->storage_class
== sc_extern
)
8149 scope
= current_decl_namespace ();
8150 else if (!at_function_scope_p ())
8151 scope
= current_scope ();
8155 && (/* If the variable is a namespace-scope variable declared in a
8156 template, we need DECL_LANG_SPECIFIC. */
8157 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8158 /* Similarly for namespace-scope variables with language linkage
8160 || (TREE_CODE (scope
) == NAMESPACE_DECL
8161 && current_lang_name
!= lang_name_cplusplus
)
8162 /* Similarly for static data members. */
8164 /* Similarly for explicit specializations. */
8166 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8167 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8169 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8171 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8172 set_decl_namespace (decl
, explicit_scope
, 0);
8174 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8176 if (declspecs
->storage_class
== sc_extern
)
8178 DECL_THIS_EXTERN (decl
) = 1;
8179 DECL_EXTERNAL (decl
) = !initialized
;
8182 if (DECL_CLASS_SCOPE_P (decl
))
8184 set_linkage_for_static_data_member (decl
);
8185 /* This function is only called with out-of-class definitions. */
8186 DECL_EXTERNAL (decl
) = 0;
8187 check_class_member_definition_namespace (decl
);
8189 /* At top level, either `static' or no s.c. makes a definition
8190 (perhaps tentative), and absence of `static' makes it public. */
8191 else if (toplevel_bindings_p ())
8193 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8194 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8195 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8197 /* Not at top level, only `static' makes a static definition. */
8200 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8201 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8204 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8206 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8207 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8208 if (declspecs
->gnu_thread_keyword_p
)
8209 DECL_GNU_TLS_P (decl
) = true;
8212 /* If the type of the decl has no linkage, make sure that we'll
8213 notice that in mark_used. */
8214 if (cxx_dialect
> cxx98
8215 && decl_linkage (decl
) != lk_none
8216 && DECL_LANG_SPECIFIC (decl
) == NULL
8217 && !DECL_EXTERN_C_P (decl
)
8218 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8219 retrofit_lang_decl (decl
);
8221 if (TREE_PUBLIC (decl
))
8223 /* [basic.link]: A name with no linkage (notably, the name of a class
8224 or enumeration declared in a local scope) shall not be used to
8225 declare an entity with linkage.
8227 DR 757 relaxes this restriction for C++0x. */
8228 if (cxx_dialect
< cxx11
)
8229 no_linkage_error (decl
);
8232 DECL_INTERFACE_KNOWN (decl
) = 1;
8234 // Handle explicit specializations and instantiations of variable templates.
8235 if (orig_declarator
)
8236 decl
= check_explicit_specialization (orig_declarator
, decl
,
8239 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8242 /* Create and return a canonical pointer to member function type, for
8243 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8246 build_ptrmemfunc_type (tree type
)
8251 if (type
== error_mark_node
)
8254 /* If a canonical type already exists for this type, use it. We use
8255 this method instead of type_hash_canon, because it only does a
8256 simple equality check on the list of field members. */
8258 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8261 /* Make sure that we always have the unqualified pointer-to-member
8263 if (cp_cv_quals quals
= cp_type_quals (type
))
8265 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8266 return cp_build_qualified_type (unqual
, quals
);
8269 t
= make_node (RECORD_TYPE
);
8271 /* Let the front end know this is a pointer to member function. */
8272 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8274 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8277 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8279 DECL_CHAIN (field
) = fields
;
8282 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8284 /* Zap out the name so that the back end will give us the debugging
8285 information for this anonymous RECORD_TYPE. */
8286 TYPE_NAME (t
) = NULL_TREE
;
8288 /* Cache this pointer-to-member type so that we can find it again
8290 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8292 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8293 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8294 else if (TYPE_CANONICAL (type
) != type
)
8295 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8300 /* Create and return a pointer to data member type. */
8303 build_ptrmem_type (tree class_type
, tree member_type
)
8305 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8307 cp_cv_quals quals
= type_memfn_quals (member_type
);
8308 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8309 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8310 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8314 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8315 return build_offset_type (class_type
, member_type
);
8319 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8320 Check to see that the definition is valid. Issue appropriate error
8321 messages. Return 1 if the definition is particularly bad, or 0
8325 check_static_variable_definition (tree decl
, tree type
)
8327 /* Can't check yet if we don't know the type. */
8328 if (dependent_type_p (type
))
8330 /* If DECL is declared constexpr, we'll do the appropriate checks
8331 in check_initializer. */
8332 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8334 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8336 if (!COMPLETE_TYPE_P (type
))
8337 error ("in-class initialization of static data member %q#D of "
8338 "incomplete type", decl
);
8339 else if (literal_type_p (type
))
8340 permerror (input_location
,
8341 "%<constexpr%> needed for in-class initialization of "
8342 "static data member %q#D of non-integral type", decl
);
8344 error ("in-class initialization of static data member %q#D of "
8345 "non-literal type", decl
);
8349 /* Motion 10 at San Diego: If a static const integral data member is
8350 initialized with an integral constant expression, the initializer
8351 may appear either in the declaration (within the class), or in
8352 the definition, but not both. If it appears in the class, the
8353 member is a member constant. The file-scope definition is always
8355 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8357 error ("invalid in-class initialization of static data member "
8358 "of non-integral type %qT",
8362 else if (!CP_TYPE_CONST_P (type
))
8363 error ("ISO C++ forbids in-class initialization of non-const "
8364 "static member %qD",
8366 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8367 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8368 "%qD of non-integral type %qT", decl
, type
);
8373 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8374 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8375 expressions out into temporary variables so that walk_tree doesn't
8376 step into them (c++/15764). */
8379 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8381 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8382 tree expr
= *expr_p
;
8383 if (TREE_CODE (expr
) == SAVE_EXPR
)
8385 tree op
= TREE_OPERAND (expr
, 0);
8386 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8387 if (TREE_SIDE_EFFECTS (op
))
8388 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8391 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8396 /* Entry point for the above. */
8399 stabilize_vla_size (tree size
)
8401 hash_set
<tree
> pset
;
8402 /* Break out any function calls into temporary variables. */
8403 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8406 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8407 not inside of SAVE_EXPR and fold them. */
8410 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8412 tree expr
= *expr_p
;
8413 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8415 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8417 *(bool *)data
= true;
8418 if (SIZEOF_EXPR_TYPE_P (expr
))
8419 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8420 SIZEOF_EXPR
, false);
8421 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8422 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8425 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8427 if (expr
== error_mark_node
)
8428 expr
= size_one_node
;
8435 /* Given the SIZE (i.e., number of elements) in an array, compute an
8436 appropriate index type for the array. If non-NULL, NAME is the
8437 name of the thing being declared. */
8440 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8445 if (error_operand_p (size
))
8446 return error_mark_node
;
8448 if (!type_dependent_expression_p (size
))
8450 tree type
= TREE_TYPE (size
);
8452 mark_rvalue_use (size
);
8454 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8455 && TREE_SIDE_EFFECTS (size
))
8456 /* In C++98, we mark a non-constant array bound with a magic
8457 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8460 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8462 if (CLASS_TYPE_P (type
)
8463 && CLASSTYPE_LITERAL_P (type
))
8465 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8468 if (!(complain
& tf_error
))
8469 return error_mark_node
;
8471 error ("size of array %qD has non-integral type %qT",
8474 error ("size of array has non-integral type %qT", type
);
8475 size
= integer_one_node
;
8477 if (size
== error_mark_node
)
8478 return error_mark_node
;
8479 type
= TREE_TYPE (size
);
8482 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8483 size
= maybe_constant_value (size
);
8485 if (!TREE_CONSTANT (size
))
8489 if (error_operand_p (size
))
8490 return error_mark_node
;
8492 /* The array bound must be an integer type. */
8493 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8495 if (!(complain
& tf_error
))
8496 return error_mark_node
;
8498 error ("size of array %qD has non-integral type %qT", name
, type
);
8500 error ("size of array has non-integral type %qT", type
);
8501 size
= integer_one_node
;
8502 type
= TREE_TYPE (size
);
8506 /* A type is dependent if it is...an array type constructed from any
8507 dependent type or whose size is specified by a constant expression
8508 that is value-dependent. */
8509 /* We can only call value_dependent_expression_p on integral constant
8510 expressions; treat non-constant expressions as dependent, too. */
8511 if (processing_template_decl
8512 && (type_dependent_expression_p (size
)
8513 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8515 /* We cannot do any checking for a SIZE that isn't known to be
8516 constant. Just build the index type and mark that it requires
8517 structural equality checks. */
8518 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8519 size
, size_one_node
));
8520 TYPE_DEPENDENT_P (itype
) = 1;
8521 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8522 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8526 /* Normally, the array-bound will be a constant. */
8527 if (TREE_CODE (size
) == INTEGER_CST
)
8529 /* Check to see if the array bound overflowed. Make that an
8530 error, no matter how generous we're being. */
8531 constant_expression_error (size
);
8533 /* An array must have a positive number of elements. */
8534 if (tree_int_cst_lt (size
, integer_zero_node
))
8536 if (!(complain
& tf_error
))
8537 return error_mark_node
;
8539 error ("size of array %qD is negative", name
);
8541 error ("size of array is negative");
8542 size
= integer_one_node
;
8544 /* As an extension we allow zero-sized arrays. */
8545 else if (integer_zerop (size
))
8547 if (!(complain
& tf_error
))
8548 /* We must fail if performing argument deduction (as
8549 indicated by the state of complain), so that
8550 another substitution can be found. */
8551 return error_mark_node
;
8552 else if (in_system_header_at (input_location
))
8553 /* Allow them in system headers because glibc uses them. */;
8555 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8557 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8560 else if (TREE_CONSTANT (size
)
8561 /* We don't allow VLAs at non-function scopes, or during
8562 tentative template substitution. */
8563 || !at_function_scope_p ()
8564 || !(complain
& tf_error
))
8566 if (!(complain
& tf_error
))
8567 return error_mark_node
;
8568 /* `(int) &fn' is not a valid array bound. */
8570 error ("size of array %qD is not an integral constant-expression",
8573 error ("size of array is not an integral constant-expression");
8574 size
= integer_one_node
;
8576 else if (pedantic
&& warn_vla
!= 0)
8579 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8581 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8583 else if (warn_vla
> 0)
8587 "variable length array %qD is used", name
);
8590 "variable length array is used");
8593 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8594 /* A variable sized array. */
8595 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8598 HOST_WIDE_INT saved_processing_template_decl
;
8600 /* Compute the index of the largest element in the array. It is
8601 one less than the number of elements in the array. We save
8602 and restore PROCESSING_TEMPLATE_DECL so that computations in
8603 cp_build_binary_op will be appropriately folded. */
8604 saved_processing_template_decl
= processing_template_decl
;
8605 processing_template_decl
= 0;
8606 itype
= cp_build_binary_op (input_location
,
8608 cp_convert (ssizetype
, size
, complain
),
8609 cp_convert (ssizetype
, integer_one_node
,
8612 itype
= fold (itype
);
8613 processing_template_decl
= saved_processing_template_decl
;
8615 if (!TREE_CONSTANT (itype
))
8617 /* A variable sized array. */
8618 itype
= variable_size (itype
);
8620 if (TREE_CODE (itype
) != SAVE_EXPR
)
8622 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8623 they might survive till gimplification. */
8624 tree newitype
= itype
;
8626 cp_walk_tree_without_duplicates (&newitype
,
8627 fold_sizeof_expr_r
, &found
);
8629 itype
= variable_size (fold (newitype
));
8632 stabilize_vla_size (itype
);
8634 if (flag_sanitize
& SANITIZE_VLA
8635 && do_ubsan_in_current_function ())
8637 /* We have to add 1 -- in the ubsan routine we generate
8638 LE_EXPR rather than LT_EXPR. */
8639 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8640 build_one_cst (TREE_TYPE (itype
)));
8641 t
= ubsan_instrument_vla (input_location
, t
);
8642 finish_expr_stmt (t
);
8645 /* Make sure that there was no overflow when creating to a signed
8646 index type. (For example, on a 32-bit machine, an array with
8647 size 2^32 - 1 is too big.) */
8648 else if (TREE_CODE (itype
) == INTEGER_CST
8649 && TREE_OVERFLOW (itype
))
8651 if (!(complain
& tf_error
))
8652 return error_mark_node
;
8653 error ("overflow in array dimension");
8654 TREE_OVERFLOW (itype
) = 0;
8658 /* Create and return the appropriate index type. */
8659 itype
= build_index_type (itype
);
8661 /* If the index type were dependent, we would have returned early, so
8662 remember that it isn't. */
8663 TYPE_DEPENDENT_P (itype
) = 0;
8664 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8668 /* Returns the scope (if any) in which the entity declared by
8669 DECLARATOR will be located. If the entity was declared with an
8670 unqualified name, NULL_TREE is returned. */
8673 get_scope_of_declarator (const cp_declarator
*declarator
)
8675 while (declarator
&& declarator
->kind
!= cdk_id
)
8676 declarator
= declarator
->declarator
;
8678 /* If the declarator-id is a SCOPE_REF, the scope in which the
8679 declaration occurs is the first operand. */
8681 && declarator
->u
.id
.qualifying_scope
)
8682 return declarator
->u
.id
.qualifying_scope
;
8684 /* Otherwise, the declarator is not a qualified name; the entity will
8685 be declared in the current scope. */
8689 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8690 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8694 create_array_type_for_decl (tree name
, tree type
, tree size
)
8696 tree itype
= NULL_TREE
;
8698 /* If things have already gone awry, bail now. */
8699 if (type
== error_mark_node
|| size
== error_mark_node
)
8700 return error_mark_node
;
8702 /* 8.3.4/1: If the type of the identifier of D contains the auto
8703 type-specifier, the program is ill-formed. */
8704 if (type_uses_auto (type
))
8706 error ("%qD declared as array of %qT", name
, type
);
8707 return error_mark_node
;
8710 /* If there are some types which cannot be array elements,
8711 issue an error-message and return. */
8712 switch (TREE_CODE (type
))
8716 error ("declaration of %qD as array of void", name
);
8718 error ("creating array of void");
8719 return error_mark_node
;
8723 error ("declaration of %qD as array of functions", name
);
8725 error ("creating array of functions");
8726 return error_mark_node
;
8728 case REFERENCE_TYPE
:
8730 error ("declaration of %qD as array of references", name
);
8732 error ("creating array of references");
8733 return error_mark_node
;
8737 error ("declaration of %qD as array of function members", name
);
8739 error ("creating array of function members");
8740 return error_mark_node
;
8748 The constant expressions that specify the bounds of the arrays
8749 can be omitted only for the first member of the sequence. */
8750 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8753 error ("declaration of %qD as multidimensional array must "
8754 "have bounds for all dimensions except the first",
8757 error ("multidimensional array must have bounds for all "
8758 "dimensions except the first");
8760 return error_mark_node
;
8763 /* Figure out the index type for the array. */
8765 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8768 T is called the array element type; this type shall not be [...] an
8769 abstract class type. */
8770 abstract_virtuals_error (name
, type
);
8772 return build_cplus_array_type (type
, itype
);
8775 /* Check that it's OK to declare a function with the indicated TYPE.
8776 SFK indicates the kind of special function (if any) that this
8777 function is. OPTYPE is the type given in a conversion operator
8778 declaration, or the class type for a constructor/destructor.
8779 Returns the actual return type of the function; that
8780 may be different than TYPE if an error occurs, or for certain
8781 special functions. */
8784 check_special_function_return_type (special_function_kind sfk
,
8790 case sfk_constructor
:
8792 error ("return type specification for constructor invalid");
8794 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8795 type
= build_pointer_type (optype
);
8797 type
= void_type_node
;
8800 case sfk_destructor
:
8802 error ("return type specification for destructor invalid");
8803 /* We can't use the proper return type here because we run into
8804 problems with ambiguous bases and covariant returns.
8805 Java classes are left unchanged because (void *) isn't a valid
8806 Java type, and we don't want to change the Java ABI. */
8807 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8808 type
= build_pointer_type (void_type_node
);
8810 type
= void_type_node
;
8813 case sfk_conversion
:
8815 error ("return type specified for %<operator %T%>", optype
);
8826 /* A variable or data member (whose unqualified name is IDENTIFIER)
8827 has been declared with the indicated TYPE. If the TYPE is not
8828 acceptable, issue an error message and return a type to use for
8829 error-recovery purposes. */
8832 check_var_type (tree identifier
, tree type
)
8834 if (VOID_TYPE_P (type
))
8837 error ("unnamed variable or field declared void");
8838 else if (identifier_p (identifier
))
8840 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8841 error ("variable or field %qE declared void", identifier
);
8844 error ("variable or field declared void");
8845 type
= error_mark_node
;
8851 /* Given declspecs and a declarator (abstract or otherwise), determine
8852 the name and type of the object declared and construct a DECL node
8855 DECLSPECS points to the representation of declaration-specifier
8856 sequence that precedes declarator.
8858 DECL_CONTEXT says which syntactic context this declaration is in:
8859 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8860 FUNCDEF for a function definition. Like NORMAL but a few different
8861 error messages in each case. Return value may be zero meaning
8862 this definition is too screwy to try to parse.
8863 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8864 handle member functions (which have FIELD context).
8865 Return value may be zero meaning this definition is too screwy to
8867 PARM for a parameter declaration (either within a function prototype
8868 or before a function body). Make a PARM_DECL, or return void_type_node.
8869 TPARM for a template parameter declaration.
8870 CATCHPARM for a parameter declaration before a catch clause.
8871 TYPENAME if for a typename (in a cast or sizeof).
8872 Don't make a DECL node; just return the ..._TYPE node.
8873 FIELD for a struct or union field; make a FIELD_DECL.
8874 BITFIELD for a field with specified width.
8876 INITIALIZED is as for start_decl.
8878 ATTRLIST is a pointer to the list of attributes, which may be NULL
8879 if there are none; *ATTRLIST may be modified if attributes from inside
8880 the declarator should be applied to the declaration.
8882 When this function is called, scoping variables (such as
8883 CURRENT_CLASS_TYPE) should reflect the scope in which the
8884 declaration occurs, not the scope in which the new declaration will
8885 be placed. For example, on:
8889 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8892 Returns a DECL (if a declarator is present), a TYPE (if there is no
8893 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8897 grokdeclarator (const cp_declarator
*declarator
,
8898 cp_decl_specifier_seq
*declspecs
,
8899 enum decl_context decl_context
,
8903 tree type
= NULL_TREE
;
8905 int explicit_intN
= 0;
8906 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8907 int explicit_int
= 0;
8908 int explicit_char
= 0;
8909 int defaulted_int
= 0;
8911 tree typedef_decl
= NULL_TREE
;
8912 const char *name
= NULL
;
8913 tree typedef_type
= NULL_TREE
;
8914 /* True if this declarator is a function definition. */
8915 bool funcdef_flag
= false;
8916 cp_declarator_kind innermost_code
= cdk_error
;
8919 /* See the code below that used this. */
8920 tree decl_attr
= NULL_TREE
;
8923 /* Keep track of what sort of function is being processed
8924 so that we can warn about default return values, or explicit
8925 return values which do not match prescribed defaults. */
8926 special_function_kind sfk
= sfk_none
;
8928 tree dname
= NULL_TREE
;
8929 tree ctor_return_type
= NULL_TREE
;
8930 enum overload_flags flags
= NO_SPECIAL
;
8931 /* cv-qualifiers that apply to the declarator, for a declaration of
8932 a member function. */
8933 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8934 /* virt-specifiers that apply to the declarator, for a declaration of
8935 a member function. */
8936 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8937 /* ref-qualifier that applies to the declarator, for a declaration of
8938 a member function. */
8939 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8940 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8942 tree raises
= NULL_TREE
;
8943 int template_count
= 0;
8944 tree returned_attrs
= NULL_TREE
;
8945 tree parms
= NULL_TREE
;
8946 const cp_declarator
*id_declarator
;
8947 /* The unqualified name of the declarator; either an
8948 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8949 tree unqualified_id
;
8950 /* The class type, if any, in which this entity is located,
8951 or NULL_TREE if none. Note that this value may be different from
8952 the current class type; for example if an attempt is made to declare
8953 "A::f" inside "B", this value will be "A". */
8954 tree ctype
= current_class_type
;
8955 /* The NAMESPACE_DECL for the namespace in which this entity is
8956 located. If an unqualified name is used to declare the entity,
8957 this value will be NULL_TREE, even if the entity is located at
8959 tree in_namespace
= NULL_TREE
;
8960 cp_storage_class storage_class
;
8961 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8962 bool type_was_error_mark_node
= false;
8963 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8964 bool template_type_arg
= false;
8965 bool template_parm_flag
= false;
8966 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8967 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8968 bool late_return_type_p
= false;
8969 bool array_parameter_p
= false;
8970 source_location saved_loc
= input_location
;
8973 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8974 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8975 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8976 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8977 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8978 explicit_intN
= declspecs
->explicit_intN_p
;
8979 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8981 if (decl_context
== FUNCDEF
)
8982 funcdef_flag
= true, decl_context
= NORMAL
;
8983 else if (decl_context
== MEMFUNCDEF
)
8984 funcdef_flag
= true, decl_context
= FIELD
;
8985 else if (decl_context
== BITFIELD
)
8986 bitfield
= 1, decl_context
= FIELD
;
8987 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8988 template_type_arg
= true, decl_context
= TYPENAME
;
8989 else if (decl_context
== TPARM
)
8990 template_parm_flag
= true, decl_context
= PARM
;
8992 if (initialized
> 1)
8993 funcdef_flag
= true;
8995 /* Look inside a declarator for the name being declared
8996 and get it as a string, for an error message. */
8997 for (id_declarator
= declarator
;
8999 id_declarator
= id_declarator
->declarator
)
9001 if (id_declarator
->kind
!= cdk_id
)
9002 innermost_code
= id_declarator
->kind
;
9004 switch (id_declarator
->kind
)
9007 if (id_declarator
->declarator
9008 && id_declarator
->declarator
->kind
== cdk_id
)
9010 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
9011 if (sfk
== sfk_destructor
)
9018 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9019 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9022 if (qualifying_scope
)
9024 if (at_function_scope_p ())
9028 A declarator-id shall not be qualified except
9031 None of the cases are permitted in block
9033 if (qualifying_scope
== global_namespace
)
9034 error ("invalid use of qualified-name %<::%D%>",
9036 else if (TYPE_P (qualifying_scope
))
9037 error ("invalid use of qualified-name %<%T::%D%>",
9038 qualifying_scope
, decl
);
9040 error ("invalid use of qualified-name %<%D::%D%>",
9041 qualifying_scope
, decl
);
9042 return error_mark_node
;
9044 else if (TYPE_P (qualifying_scope
))
9046 ctype
= qualifying_scope
;
9047 if (!MAYBE_CLASS_TYPE_P (ctype
))
9049 error ("%q#T is not a class or a namespace", ctype
);
9052 else if (innermost_code
!= cdk_function
9053 && current_class_type
9054 && !uniquely_derived_from_p (ctype
,
9055 current_class_type
))
9057 error ("invalid use of qualified-name %<%T::%D%>",
9058 qualifying_scope
, decl
);
9059 return error_mark_node
;
9062 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9063 in_namespace
= qualifying_scope
;
9065 switch (TREE_CODE (decl
))
9071 if (innermost_code
!= cdk_function
)
9073 error ("declaration of %qD as non-function", decl
);
9074 return error_mark_node
;
9076 else if (!qualifying_scope
9077 && !(current_class_type
&& at_class_scope_p ()))
9079 error ("declaration of %qD as non-member", decl
);
9080 return error_mark_node
;
9083 type
= TREE_OPERAND (decl
, 0);
9085 type
= constructor_name (type
);
9086 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9091 case TEMPLATE_ID_EXPR
:
9093 tree fns
= TREE_OPERAND (decl
, 0);
9096 if (!identifier_p (dname
))
9098 if (variable_template_p (dname
))
9099 dname
= DECL_NAME (dname
);
9102 gcc_assert (is_overloaded_fn (dname
));
9103 dname
= DECL_NAME (get_first_fn (dname
));
9109 case IDENTIFIER_NODE
:
9110 if (identifier_p (decl
))
9113 if (C_IS_RESERVED_WORD (dname
))
9115 error ("declarator-id missing; using reserved word %qD",
9117 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9119 else if (!IDENTIFIER_TYPENAME_P (dname
))
9120 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9123 gcc_assert (flags
== NO_SPECIAL
);
9124 flags
= TYPENAME_FLAG
;
9125 ctor_return_type
= TREE_TYPE (dname
);
9126 sfk
= sfk_conversion
;
9127 if (is_typename_at_global_scope (dname
))
9128 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9130 name
= "<invalid operator>";
9147 return error_mark_node
;
9152 if (id_declarator
->kind
== cdk_id
)
9158 The declarator in a function-definition shall have the form
9159 D1 ( parameter-declaration-clause) ... */
9160 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9162 error ("function definition does not declare parameters");
9163 return error_mark_node
;
9166 if (flags
== TYPENAME_FLAG
9167 && innermost_code
!= cdk_function
9168 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9170 error ("declaration of %qD as non-function", dname
);
9171 return error_mark_node
;
9175 && identifier_p (dname
)
9176 && UDLIT_OPER_P (dname
)
9177 && innermost_code
!= cdk_function
)
9179 error ("declaration of %qD as non-function", dname
);
9180 return error_mark_node
;
9183 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9187 error ("declaration of %qD as %<typedef%>", dname
);
9188 return error_mark_node
;
9190 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9192 error ("declaration of %qD as parameter", dname
);
9193 return error_mark_node
;
9197 /* Anything declared one level down from the top level
9198 must be one of the parameters of a function
9199 (because the body is at least two levels down). */
9201 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9202 by not allowing C++ class definitions to specify their parameters
9203 with xdecls (must be spec.d in the parmlist).
9205 Since we now wait to push a class scope until we are sure that
9206 we are in a legitimate method context, we must set oldcname
9207 explicitly (since current_class_name is not yet alive).
9209 We also want to avoid calling this a PARM if it is in a namespace. */
9211 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9213 cp_binding_level
*b
= current_binding_level
;
9214 current_binding_level
= b
->level_chain
;
9215 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9216 decl_context
= PARM
;
9217 current_binding_level
= b
;
9221 name
= decl_context
== PARM
? "parameter" : "type name";
9223 if (constexpr_p
&& typedef_p
)
9225 error ("%<constexpr%> cannot appear in a typedef declaration");
9226 return error_mark_node
;
9229 /* If there were multiple types specified in the decl-specifier-seq,
9230 issue an error message. */
9231 if (declspecs
->multiple_types_p
)
9233 error ("two or more data types in declaration of %qs", name
);
9234 return error_mark_node
;
9237 if (declspecs
->conflicting_specifiers_p
)
9239 error ("conflicting specifiers in declaration of %qs", name
);
9240 return error_mark_node
;
9243 /* Extract the basic type from the decl-specifier-seq. */
9244 type
= declspecs
->type
;
9245 if (type
== error_mark_node
)
9248 type_was_error_mark_node
= true;
9250 /* If the entire declaration is itself tagged as deprecated then
9251 suppress reports of deprecated items. */
9252 if (type
&& TREE_DEPRECATED (type
)
9253 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9254 warn_deprecated_use (type
, NULL_TREE
);
9255 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9257 typedef_decl
= type
;
9258 type
= TREE_TYPE (typedef_decl
);
9259 if (TREE_DEPRECATED (type
)
9260 && DECL_ARTIFICIAL (typedef_decl
)
9261 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9262 warn_deprecated_use (type
, NULL_TREE
);
9264 /* No type at all: default to `int', and set DEFAULTED_INT
9265 because it was not a user-defined typedef. */
9266 if (type
== NULL_TREE
)
9268 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9270 /* These imply 'int'. */
9271 type
= integer_type_node
;
9274 /* If we just have "complex", it is equivalent to "complex double". */
9275 else if (!longlong
&& !explicit_intN
9276 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9278 type
= double_type_node
;
9279 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9280 "ISO C++ does not support plain %<complex%> meaning "
9281 "%<double complex%>");
9285 explicit_int
= declspecs
->explicit_int_p
;
9286 explicit_char
= declspecs
->explicit_char_p
;
9289 /* See the code below that used this. */
9291 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9293 typedef_type
= type
;
9296 if (sfk
!= sfk_conversion
)
9297 ctor_return_type
= ctype
;
9299 if (sfk
!= sfk_none
)
9300 type
= check_special_function_return_type (sfk
, type
,
9302 else if (type
== NULL_TREE
)
9308 /* We handle `main' specially here, because 'main () { }' is so
9309 common. With no options, it is allowed. With -Wreturn-type,
9310 it is a warning. It is only an error with -pedantic-errors. */
9311 is_main
= (funcdef_flag
9312 && dname
&& identifier_p (dname
)
9313 && MAIN_NAME_P (dname
)
9314 && ctype
== NULL_TREE
9315 && in_namespace
== NULL_TREE
9316 && current_namespace
== global_namespace
);
9318 if (type_was_error_mark_node
)
9319 /* We've already issued an error, don't complain more. */;
9320 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9321 /* Allow it, sigh. */;
9323 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9325 pedwarn (input_location
, OPT_Wpedantic
,
9326 "ISO C++ forbids declaration of %qs with no type", name
);
9328 warning (OPT_Wreturn_type
,
9329 "ISO C++ forbids declaration of %qs with no type", name
);
9331 type
= integer_type_node
;
9338 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9340 error ("%<__int%d%> is not supported by this target",
9341 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9342 explicit_intN
= false;
9344 else if (pedantic
&& ! in_system_header_at (input_location
))
9345 pedwarn (input_location
, OPT_Wpedantic
,
9346 "ISO C++ does not support %<__int%d%> for %qs",
9347 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9350 /* Now process the modifiers that were specified
9351 and check for invalid combinations. */
9353 /* Long double is a special combination. */
9354 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9357 type
= cp_build_qualified_type (long_double_type_node
,
9358 cp_type_quals (type
));
9361 /* Check all other uses of type modifiers. */
9363 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9367 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9368 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9369 else if (signed_p
&& unsigned_p
)
9370 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9371 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9372 error ("%<long long%> invalid for %qs", name
);
9373 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9374 error ("%<long%> invalid for %qs", name
);
9375 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9376 error ("%<short%> invalid for %qs", name
);
9377 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9378 error ("%<long%> or %<short%> invalid for %qs", name
);
9379 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9380 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9381 else if ((long_p
|| short_p
) && explicit_char
)
9382 error ("%<long%> or %<short%> specified with char for %qs", name
);
9383 else if (long_p
&& short_p
)
9384 error ("%<long%> and %<short%> specified together for %qs", name
);
9385 else if (type
== char16_type_node
|| type
== char32_type_node
)
9387 if (signed_p
|| unsigned_p
)
9388 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9389 else if (short_p
|| long_p
)
9390 error ("%<short%> or %<long%> invalid for %qs", name
);
9395 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9397 pedwarn (input_location
, OPT_Wpedantic
,
9398 "long, short, signed or unsigned used invalidly for %qs",
9400 if (flag_pedantic_errors
)
9405 /* Discard the type modifiers if they are invalid. */
9416 /* Decide whether an integer type is signed or not.
9417 Optionally treat bitfields as signed by default. */
9421 It is implementation-defined whether a plain (neither
9422 explicitly signed or unsigned) char, short, int, or long
9423 bit-field is signed or unsigned.
9425 Naturally, we extend this to long long as well. Note that
9426 this does not include wchar_t. */
9427 || (bitfield
&& !flag_signed_bitfields
9429 /* A typedef for plain `int' without `signed' can be
9430 controlled just like plain `int', but a typedef for
9431 `signed int' cannot be so controlled. */
9433 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9434 && TREE_CODE (type
) == INTEGER_TYPE
9435 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9438 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9440 type
= long_long_unsigned_type_node
;
9442 type
= long_unsigned_type_node
;
9444 type
= short_unsigned_type_node
;
9445 else if (type
== char_type_node
)
9446 type
= unsigned_char_type_node
;
9447 else if (typedef_decl
)
9448 type
= unsigned_type_for (type
);
9450 type
= unsigned_type_node
;
9452 else if (signed_p
&& type
== char_type_node
)
9453 type
= signed_char_type_node
;
9454 else if (explicit_intN
)
9455 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9457 type
= long_long_integer_type_node
;
9459 type
= long_integer_type_node
;
9461 type
= short_integer_type_node
;
9463 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9465 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9466 error ("complex invalid for %qs", name
);
9467 /* If a modifier is specified, the resulting complex is the complex
9468 form of TYPE. E.g, "complex short" is "complex short int". */
9469 else if (type
== integer_type_node
)
9470 type
= complex_integer_type_node
;
9471 else if (type
== float_type_node
)
9472 type
= complex_float_type_node
;
9473 else if (type
== double_type_node
)
9474 type
= complex_double_type_node
;
9475 else if (type
== long_double_type_node
)
9476 type
= complex_long_double_type_node
;
9478 type
= build_complex_type (type
);
9481 type_quals
= TYPE_UNQUALIFIED
;
9482 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9483 type_quals
|= TYPE_QUAL_CONST
;
9484 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9485 type_quals
|= TYPE_QUAL_VOLATILE
;
9486 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9487 type_quals
|= TYPE_QUAL_RESTRICT
;
9488 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9489 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9492 /* If we're using the injected-class-name to form a compound type or a
9493 declaration, replace it with the underlying class so we don't get
9494 redundant typedefs in the debug output. But if we are returning the
9495 type unchanged, leave it alone so that it's available to
9496 maybe_get_template_decl_from_type_decl. */
9497 if (CLASS_TYPE_P (type
)
9498 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9499 && type
== TREE_TYPE (TYPE_NAME (type
))
9500 && (declarator
|| type_quals
))
9501 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9503 type_quals
|= cp_type_quals (type
);
9504 type
= cp_build_qualified_type_real
9505 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9506 || declspecs
->decltype_p
)
9507 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9508 /* We might have ignored or rejected some of the qualifiers. */
9509 type_quals
= cp_type_quals (type
);
9512 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9513 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9514 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9516 storage_class
= declspecs
->storage_class
;
9517 if (storage_class
== sc_static
)
9518 staticp
= 1 + (decl_context
== FIELD
);
9520 if (virtualp
&& staticp
== 2)
9522 error ("member %qD cannot be declared both virtual and static", dname
);
9523 storage_class
= sc_none
;
9526 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9528 /* Issue errors about use of storage classes for parameters. */
9529 if (decl_context
== PARM
)
9533 error ("typedef declaration invalid in parameter declaration");
9534 return error_mark_node
;
9536 else if (template_parm_flag
&& storage_class
!= sc_none
)
9538 error ("storage class specified for template parameter %qs", name
);
9539 return error_mark_node
;
9541 else if (storage_class
== sc_static
9542 || storage_class
== sc_extern
9544 error ("storage class specifiers invalid in parameter declarations");
9546 /* Function parameters cannot be constexpr. If we saw one, moan
9547 and pretend it wasn't there. */
9550 error ("a parameter cannot be declared %<constexpr%>");
9555 /* Give error if `virtual' is used outside of class declaration. */
9557 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9559 error ("%<virtual%> outside class declaration");
9563 /* Static anonymous unions are dealt with here. */
9564 if (staticp
&& decl_context
== TYPENAME
9566 && ANON_AGGR_TYPE_P (declspecs
->type
))
9567 decl_context
= FIELD
;
9569 /* Warn about storage classes that are invalid for certain
9570 kinds of declarations (parameters, typenames, etc.). */
9573 && storage_class
!= sc_extern
9574 && storage_class
!= sc_static
)
9577 error ("multiple storage classes in declaration of %qs", name
);
9580 if (decl_context
!= NORMAL
9581 && ((storage_class
!= sc_none
9582 && storage_class
!= sc_mutable
)
9585 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9586 && (storage_class
== sc_register
9587 || storage_class
== sc_auto
))
9591 else if (decl_context
== FIELD
9592 /* C++ allows static class elements. */
9593 && storage_class
== sc_static
)
9594 /* C++ also allows inlines and signed and unsigned elements,
9595 but in those cases we don't come in here. */
9599 if (decl_context
== FIELD
)
9600 error ("storage class specified for %qs", name
);
9603 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9604 error ("storage class specified for parameter %qs", name
);
9606 error ("storage class specified for typename");
9608 if (storage_class
== sc_register
9609 || storage_class
== sc_auto
9610 || storage_class
== sc_extern
9612 storage_class
= sc_none
;
9615 else if (storage_class
== sc_extern
&& funcdef_flag
9616 && ! toplevel_bindings_p ())
9617 error ("nested function %qs declared %<extern%>", name
);
9618 else if (toplevel_bindings_p ())
9620 if (storage_class
== sc_auto
)
9621 error ("top-level declaration of %qs specifies %<auto%>", name
);
9624 && storage_class
!= sc_extern
9625 && storage_class
!= sc_static
)
9627 if (declspecs
->gnu_thread_keyword_p
)
9628 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9629 "declared %<__thread%>", name
);
9631 /* When thread_local is applied to a variable of block scope the
9632 storage-class-specifier static is implied if it does not appear
9634 storage_class
= declspecs
->storage_class
= sc_static
;
9638 if (storage_class
&& friendp
)
9640 error ("storage class specifiers invalid in friend function declarations");
9641 storage_class
= sc_none
;
9646 unqualified_id
= NULL_TREE
;
9649 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9650 switch (TREE_CODE (unqualified_id
))
9653 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9654 if (TYPE_P (unqualified_id
))
9655 unqualified_id
= constructor_name (unqualified_id
);
9658 case IDENTIFIER_NODE
:
9659 case TEMPLATE_ID_EXPR
:
9667 if (declspecs
->std_attributes
)
9669 /* Apply the c++11 attributes to the type preceding them. */
9670 input_location
= declspecs
->locations
[ds_std_attribute
];
9671 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9672 input_location
= saved_loc
;
9675 /* Determine the type of the entity declared by recurring on the
9677 for (; declarator
; declarator
= declarator
->declarator
)
9679 const cp_declarator
*inner_declarator
;
9682 if (type
== error_mark_node
)
9683 return error_mark_node
;
9685 attrs
= declarator
->attributes
;
9691 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9692 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9693 if (declarator
->kind
== cdk_function
)
9694 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9695 if (declarator
->kind
== cdk_array
)
9696 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9697 returned_attrs
= decl_attributes (&type
,
9698 chainon (returned_attrs
, attrs
),
9702 if (declarator
->kind
== cdk_id
)
9705 inner_declarator
= declarator
->declarator
;
9707 switch (declarator
->kind
)
9710 type
= create_array_type_for_decl (dname
, type
,
9711 declarator
->u
.array
.bounds
);
9712 if (declarator
->std_attributes
)
9715 The optional attribute-specifier-seq appertains to the
9717 returned_attrs
= chainon (returned_attrs
,
9718 declarator
->std_attributes
);
9726 /* Declaring a function type.
9727 Make sure we have a valid type for the function to return. */
9729 if (type_quals
!= TYPE_UNQUALIFIED
)
9731 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9732 warning (OPT_Wignored_qualifiers
,
9733 "type qualifiers ignored on function return type");
9734 /* We now know that the TYPE_QUALS don't apply to the
9735 decl, but to its return type. */
9736 type_quals
= TYPE_UNQUALIFIED
;
9738 errmsg
= targetm
.invalid_return_type (type
);
9742 type
= integer_type_node
;
9745 /* Error about some types functions can't return. */
9747 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9749 error ("%qs declared as function returning a function", name
);
9750 return error_mark_node
;
9752 if (TREE_CODE (type
) == ARRAY_TYPE
)
9754 error ("%qs declared as function returning an array", name
);
9755 return error_mark_node
;
9758 input_location
= declspecs
->locations
[ds_type_spec
];
9759 abstract_virtuals_error (ACU_RETURN
, type
);
9760 input_location
= saved_loc
;
9762 /* Pick up type qualifiers which should be applied to `this'. */
9763 memfn_quals
= declarator
->u
.function
.qualifiers
;
9764 /* Pick up virt-specifiers. */
9765 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9766 /* And ref-qualifier, too */
9767 rqual
= declarator
->u
.function
.ref_qualifier
;
9768 /* Pick up the exception specifications. */
9769 raises
= declarator
->u
.function
.exception_specification
;
9770 /* If the exception-specification is ill-formed, let's pretend
9771 there wasn't one. */
9772 if (raises
== error_mark_node
)
9775 /* Say it's a definition only for the CALL_EXPR
9776 closest to the identifier. */
9777 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9779 /* Handle a late-specified return type. */
9782 if (type_uses_auto (type
))
9784 if (!declarator
->u
.function
.late_return_type
)
9786 if (current_class_type
9787 && LAMBDA_TYPE_P (current_class_type
))
9788 /* OK for C++11 lambdas. */;
9789 else if (cxx_dialect
< cxx14
)
9791 error ("%qs function uses "
9792 "%<auto%> type specifier without trailing "
9793 "return type", name
);
9794 inform (input_location
, "deduced return type "
9795 "only available with -std=c++14 or "
9800 error ("virtual function cannot "
9801 "have deduced return type");
9805 else if (!is_auto (type
))
9807 error ("%qs function with trailing return type has"
9808 " %qT as its type rather than plain %<auto%>",
9810 return error_mark_node
;
9813 else if (declarator
->u
.function
.late_return_type
)
9815 if (cxx_dialect
< cxx11
)
9816 /* Not using maybe_warn_cpp0x because this should
9817 always be an error. */
9818 error ("trailing return type only available with "
9819 "-std=c++11 or -std=gnu++11");
9821 error ("%qs function with trailing return type not "
9822 "declared with %<auto%> type specifier", name
);
9823 return error_mark_node
;
9826 type
= splice_late_return_type
9827 (type
, declarator
->u
.function
.late_return_type
);
9828 if (type
== error_mark_node
)
9829 return error_mark_node
;
9831 if (declarator
->u
.function
.late_return_type
)
9832 late_return_type_p
= true;
9834 if (ctype
== NULL_TREE
9835 && decl_context
== FIELD
9838 ctype
= current_class_type
;
9840 if (ctype
&& (sfk
== sfk_constructor
9841 || sfk
== sfk_destructor
))
9843 /* We are within a class's scope. If our declarator name
9844 is the same as the class name, and we are defining
9845 a function, then it is a constructor/destructor, and
9846 therefore returns a void type. */
9848 /* ISO C++ 12.4/2. A destructor may not be declared
9849 const or volatile. A destructor may not be static.
9850 A destructor may not be declared with ref-qualifier.
9852 ISO C++ 12.1. A constructor may not be declared
9853 const or volatile. A constructor may not be
9854 virtual. A constructor may not be static.
9855 A constructor may not be declared with ref-qualifier. */
9857 error ((flags
== DTOR_FLAG
)
9858 ? G_("destructor cannot be static member function")
9859 : G_("constructor cannot be static member function"));
9862 error ((flags
== DTOR_FLAG
)
9863 ? G_("destructors may not be cv-qualified")
9864 : G_("constructors may not be cv-qualified"));
9865 memfn_quals
= TYPE_UNQUALIFIED
;
9870 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9871 error ((flags
== DTOR_FLAG
)
9872 ? "destructors may not be ref-qualified"
9873 : "constructors may not be ref-qualified");
9874 rqual
= REF_QUAL_NONE
;
9877 if (decl_context
== FIELD
9878 && !member_function_or_else (ctype
,
9881 return error_mark_node
;
9883 if (flags
!= DTOR_FLAG
)
9885 /* It's a constructor. */
9890 permerror (input_location
, "constructors cannot be declared virtual");
9893 if (decl_context
== FIELD
9894 && sfk
!= sfk_constructor
)
9895 return error_mark_node
;
9897 if (decl_context
== FIELD
)
9904 /* Cannot be both friend and virtual. */
9905 error ("virtual functions cannot be friends");
9908 if (decl_context
== NORMAL
)
9909 error ("friend declaration not in class definition");
9910 if (current_function_decl
&& funcdef_flag
)
9911 error ("can%'t define friend function %qs in a local "
9915 else if (ctype
&& sfk
== sfk_conversion
)
9919 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9924 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9927 if (inner_declarator
9928 && inner_declarator
->kind
== cdk_id
9929 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9930 && arg_types
!= void_list_node
)
9932 error ("destructors may not have parameters");
9933 arg_types
= void_list_node
;
9937 type
= build_function_type (type
, arg_types
);
9938 if (declarator
->std_attributes
)
9941 The optional attribute-specifier-seq appertains to
9942 the function type. */
9943 decl_attributes (&type
, declarator
->std_attributes
,
9951 /* Filter out pointers-to-references and references-to-references.
9952 We can get these if a TYPE_DECL is used. */
9954 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9956 if (declarator
->kind
!= cdk_reference
)
9958 error ("cannot declare pointer to %q#T", type
);
9959 type
= TREE_TYPE (type
);
9962 /* In C++0x, we allow reference to reference declarations
9963 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9964 and template type arguments [14.3.1/4 temp.arg.type]. The
9965 check for direct reference to reference declarations, which
9966 are still forbidden, occurs below. Reasoning behind the change
9967 can be found in DR106, DR540, and the rvalue reference
9969 else if (cxx_dialect
== cxx98
)
9971 error ("cannot declare reference to %q#T", type
);
9972 type
= TREE_TYPE (type
);
9975 else if (VOID_TYPE_P (type
))
9977 if (declarator
->kind
== cdk_reference
)
9978 error ("cannot declare reference to %q#T", type
);
9979 else if (declarator
->kind
== cdk_ptrmem
)
9980 error ("cannot declare pointer to %q#T member", type
);
9983 /* We now know that the TYPE_QUALS don't apply to the decl,
9984 but to the target of the pointer. */
9985 type_quals
= TYPE_UNQUALIFIED
;
9987 /* This code used to handle METHOD_TYPE, but I don't think it's
9988 possible to get it here anymore. */
9989 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9990 if (declarator
->kind
== cdk_ptrmem
9991 && TREE_CODE (type
) == FUNCTION_TYPE
)
9993 memfn_quals
|= type_memfn_quals (type
);
9994 type
= build_memfn_type (type
,
9995 declarator
->u
.pointer
.class_type
,
9998 if (type
== error_mark_node
)
9999 return error_mark_node
;
10001 rqual
= REF_QUAL_NONE
;
10002 memfn_quals
= TYPE_UNQUALIFIED
;
10005 if (TREE_CODE (type
) == FUNCTION_TYPE
10006 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10007 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
10008 error (declarator
->kind
== cdk_reference
10009 ? G_("cannot declare reference to qualified function type %qT")
10010 : G_("cannot declare pointer to qualified function type %qT"),
10013 /* When the pointed-to type involves components of variable size,
10014 care must be taken to ensure that the size evaluation code is
10015 emitted early enough to dominate all the possible later uses
10016 and late enough for the variables on which it depends to have
10019 This is expected to happen automatically when the pointed-to
10020 type has a name/declaration of it's own, but special attention
10021 is required if the type is anonymous.
10023 We handle the NORMAL and FIELD contexts here by inserting a
10024 dummy statement that just evaluates the size at a safe point
10025 and ensures it is not deferred until e.g. within a deeper
10026 conditional context (c++/43555).
10028 We expect nothing to be needed here for PARM or TYPENAME.
10029 Evaluating the size at this point for TYPENAME would
10030 actually be incorrect, as we might be in the middle of an
10031 expression with side effects on the pointed-to type size
10032 "arguments" prior to the pointer declaration point and the
10033 size evaluation could end up prior to the side effects. */
10035 if (!TYPE_NAME (type
)
10036 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10037 && at_function_scope_p ()
10038 && variably_modified_type_p (type
, NULL_TREE
))
10039 /* Force evaluation of the SAVE_EXPR. */
10040 finish_expr_stmt (TYPE_SIZE (type
));
10042 if (declarator
->kind
== cdk_reference
)
10044 /* In C++0x, the type we are creating a reference to might be
10045 a typedef which is itself a reference type. In that case,
10046 we follow the reference collapsing rules in
10047 [7.1.3/8 dcl.typedef] to create the final reference type:
10049 "If a typedef TD names a type that is a reference to a type
10050 T, an attempt to create the type 'lvalue reference to cv TD'
10051 creates the type 'lvalue reference to T,' while an attempt
10052 to create the type "rvalue reference to cv TD' creates the
10055 if (VOID_TYPE_P (type
))
10056 /* We already gave an error. */;
10057 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10059 if (declarator
->u
.reference
.rvalue_ref
)
10060 /* Leave type alone. */;
10062 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10065 type
= cp_build_reference_type
10066 (type
, declarator
->u
.reference
.rvalue_ref
);
10068 /* In C++0x, we need this check for direct reference to
10069 reference declarations, which are forbidden by
10070 [8.3.2/5 dcl.ref]. Reference to reference declarations
10071 are only allowed indirectly through typedefs and template
10072 type arguments. Example:
10074 void foo(int & &); // invalid ref-to-ref decl
10076 typedef int & int_ref;
10077 void foo(int_ref &); // valid ref-to-ref decl
10079 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10080 error ("cannot declare reference to %q#T, which is not "
10081 "a typedef or a template type argument", type
);
10083 else if (TREE_CODE (type
) == METHOD_TYPE
)
10084 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10085 else if (declarator
->kind
== cdk_ptrmem
)
10087 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10088 != NAMESPACE_DECL
);
10089 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10090 /* We will already have complained. */
10091 type
= error_mark_node
;
10093 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10097 type
= build_pointer_type (type
);
10099 /* Process a list of type modifier keywords (such as
10100 const or volatile) that were given inside the `*' or `&'. */
10102 if (declarator
->u
.pointer
.qualifiers
)
10105 = cp_build_qualified_type (type
,
10106 declarator
->u
.pointer
.qualifiers
);
10107 type_quals
= cp_type_quals (type
);
10110 /* Apply C++11 attributes to the pointer, and not to the
10111 type pointed to. This is unlike what is done for GNU
10112 attributes above. It is to comply with [dcl.ptr]/1:
10114 [the optional attribute-specifier-seq (7.6.1) appertains
10115 to the pointer and not to the object pointed to]. */
10116 if (declarator
->std_attributes
)
10117 decl_attributes (&type
, declarator
->std_attributes
,
10127 gcc_unreachable ();
10131 /* A `constexpr' specifier used in an object declaration declares
10132 the object as `const'. */
10133 if (constexpr_p
&& innermost_code
!= cdk_function
)
10135 if (type_quals
& TYPE_QUAL_VOLATILE
)
10136 error ("both %<volatile%> and %<constexpr%> cannot be used here");
10137 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10139 type_quals
|= TYPE_QUAL_CONST
;
10140 type
= cp_build_qualified_type (type
, type_quals
);
10144 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10145 && TREE_CODE (type
) != FUNCTION_TYPE
10146 && TREE_CODE (type
) != METHOD_TYPE
10147 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10149 error ("template-id %qD used as a declarator",
10151 unqualified_id
= dname
;
10154 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10155 qualified with a class-name, turn it into a METHOD_TYPE, unless
10156 we know that the function is static. We take advantage of this
10157 opportunity to do other processing that pertains to entities
10158 explicitly declared to be class members. Note that if DECLARATOR
10159 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10160 would not have exited the loop above. */
10162 && declarator
->u
.id
.qualifying_scope
10163 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10165 ctype
= declarator
->u
.id
.qualifying_scope
;
10166 ctype
= TYPE_MAIN_VARIANT (ctype
);
10167 template_count
= num_template_headers_for_class (ctype
);
10169 if (ctype
== current_class_type
)
10173 permerror (input_location
, "member functions are implicitly friends of their class");
10177 permerror (declarator
->id_loc
,
10178 "extra qualification %<%T::%> on member %qs",
10181 else if (/* If the qualifying type is already complete, then we
10182 can skip the following checks. */
10183 !COMPLETE_TYPE_P (ctype
)
10184 && (/* If the function is being defined, then
10185 qualifying type must certainly be complete. */
10187 /* A friend declaration of "T::f" is OK, even if
10188 "T" is a template parameter. But, if this
10189 function is not a friend, the qualifying type
10190 must be a class. */
10191 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10192 /* For a declaration, the type need not be
10193 complete, if either it is dependent (since there
10194 is no meaningful definition of complete in that
10195 case) or the qualifying class is currently being
10197 || !(dependent_type_p (ctype
)
10198 || currently_open_class (ctype
)))
10199 /* Check that the qualifying type is complete. */
10200 && !complete_type_or_else (ctype
, NULL_TREE
))
10201 return error_mark_node
;
10202 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10204 if (current_class_type
10205 && (!friendp
|| funcdef_flag
))
10207 error (funcdef_flag
10208 ? G_("cannot define member function %<%T::%s%> "
10210 : G_("cannot declare member function %<%T::%s%> "
10212 ctype
, name
, current_class_type
);
10213 return error_mark_node
;
10216 else if (typedef_p
&& current_class_type
)
10218 error ("cannot declare member %<%T::%s%> within %qT",
10219 ctype
, name
, current_class_type
);
10220 return error_mark_node
;
10224 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10225 ctype
= current_class_type
;
10227 /* Now TYPE has the actual type. */
10229 if (returned_attrs
)
10232 *attrlist
= chainon (returned_attrs
, *attrlist
);
10234 attrlist
= &returned_attrs
;
10238 && declarator
->kind
== cdk_id
10239 && declarator
->std_attributes
)
10240 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10241 a declarator-id appertains to the entity that is declared. */
10242 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10244 /* Handle parameter packs. */
10245 if (parameter_pack_p
)
10247 if (decl_context
== PARM
)
10248 /* Turn the type into a pack expansion.*/
10249 type
= make_pack_expansion (type
);
10251 error ("non-parameter %qs cannot be a parameter pack", name
);
10254 /* Did array size calculations overflow or does the array cover more
10255 than half of the address-space? */
10256 if (TREE_CODE (type
) == ARRAY_TYPE
10257 && COMPLETE_TYPE_P (type
)
10258 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10259 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10261 error ("size of array %qs is too large", name
);
10262 /* If we proceed with the array type as it is, we'll eventually
10263 crash in tree_to_[su]hwi(). */
10264 type
= error_mark_node
;
10267 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10268 && !processing_template_decl
10269 && variably_modified_type_p (type
, NULL_TREE
))
10271 if (decl_context
== FIELD
)
10272 error ("data member may not have variably modified type %qT", type
);
10274 error ("parameter may not have variably modified type %qT", type
);
10275 type
= error_mark_node
;
10278 if (explicitp
== 1 || (explicitp
&& friendp
))
10280 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10281 in the declaration of a constructor or conversion function within
10282 a class definition. */
10283 if (!current_class_type
)
10284 error ("%<explicit%> outside class declaration");
10286 error ("%<explicit%> in friend declaration");
10288 error ("only declarations of constructors and conversion operators "
10289 "can be %<explicit%>");
10293 if (storage_class
== sc_mutable
)
10295 if (decl_context
!= FIELD
|| friendp
)
10297 error ("non-member %qs cannot be declared %<mutable%>", name
);
10298 storage_class
= sc_none
;
10300 else if (decl_context
== TYPENAME
|| typedef_p
)
10302 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10303 storage_class
= sc_none
;
10305 else if (TREE_CODE (type
) == FUNCTION_TYPE
10306 || TREE_CODE (type
) == METHOD_TYPE
)
10308 error ("function %qs cannot be declared %<mutable%>", name
);
10309 storage_class
= sc_none
;
10313 error ("static %qs cannot be declared %<mutable%>", name
);
10314 storage_class
= sc_none
;
10316 else if (type_quals
& TYPE_QUAL_CONST
)
10318 error ("const %qs cannot be declared %<mutable%>", name
);
10319 storage_class
= sc_none
;
10321 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10323 permerror (input_location
, "reference %qs cannot be declared "
10324 "%<mutable%>", name
);
10325 storage_class
= sc_none
;
10329 /* If this is declaring a typedef name, return a TYPE_DECL. */
10330 if (typedef_p
&& decl_context
!= TYPENAME
)
10334 /* Note that the grammar rejects storage classes
10335 in typenames, fields or parameters. */
10336 if (current_lang_name
== lang_name_java
)
10337 TYPE_FOR_JAVA (type
) = 1;
10339 /* This declaration:
10341 typedef void f(int) const;
10343 declares a function type which is not a member of any
10344 particular class, but which is cv-qualified; for
10345 example "f S::*" declares a pointer to a const-qualified
10346 member function of S. We record the cv-qualification in the
10348 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10350 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10352 /* We have now dealt with these qualifiers. */
10353 memfn_quals
= TYPE_UNQUALIFIED
;
10354 rqual
= REF_QUAL_NONE
;
10357 if (type_uses_auto (type
))
10359 error ("typedef declared %<auto%>");
10360 type
= error_mark_node
;
10363 if (decl_context
== FIELD
)
10364 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10366 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10367 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10368 error_at (DECL_SOURCE_LOCATION (decl
),
10369 "typedef name may not be a nested-name-specifier");
10370 TREE_TYPE (decl
) = error_mark_node
;
10373 if (decl_context
!= FIELD
)
10375 if (!current_function_decl
)
10376 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10377 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10378 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10379 (current_function_decl
)))
10380 /* The TYPE_DECL is "abstract" because there will be
10381 clones of this constructor/destructor, and there will
10382 be copies of this TYPE_DECL generated in those
10383 clones. The decloning optimization (for space) may
10384 revert this subsequently if it determines that
10385 the clones should share a common implementation. */
10386 DECL_ABSTRACT_P (decl
) = true;
10388 else if (current_class_type
10389 && constructor_name_p (unqualified_id
, current_class_type
))
10390 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10391 "as enclosing class",
10394 /* If the user declares "typedef struct {...} foo" then the
10395 struct will have an anonymous name. Fill that name in now.
10396 Nothing can refer to it, so nothing needs know about the name
10398 if (type
!= error_mark_node
10400 && TYPE_NAME (type
)
10401 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10402 && TYPE_ANONYMOUS_P (type
)
10403 && declspecs
->type_definition_p
10404 && attributes_naming_typedef_ok (*attrlist
)
10405 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10409 /* Replace the anonymous name with the real name everywhere. */
10410 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10412 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10413 /* We do not rename the debug info representing the
10414 anonymous tagged type because the standard says in
10415 [dcl.typedef] that the naming applies only for
10416 linkage purposes. */
10417 /*debug_hooks->set_name (t, decl);*/
10418 TYPE_NAME (t
) = decl
;
10421 if (TYPE_LANG_SPECIFIC (type
))
10422 TYPE_WAS_ANONYMOUS (type
) = 1;
10424 /* If this is a typedef within a template class, the nested
10425 type is a (non-primary) template. The name for the
10426 template needs updating as well. */
10427 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10428 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10429 = TYPE_IDENTIFIER (type
);
10431 /* Adjust linkage now that we aren't anonymous anymore. */
10432 reset_type_linkage (type
);
10434 /* FIXME remangle member functions; member functions of a
10435 type with external linkage have external linkage. */
10439 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10440 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10442 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10443 memfn_quals
!= TYPE_UNQUALIFIED
,
10444 inlinep
, friendp
, raises
!= NULL_TREE
);
10446 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10447 /* Acknowledge that this was written:
10448 `using analias = atype;'. */
10449 TYPE_DECL_ALIAS_P (decl
) = 1;
10454 /* Detect the case of an array type of unspecified size
10455 which came, as such, direct from a typedef name.
10456 We must copy the type, so that the array's domain can be
10457 individually set by the object's initializer. */
10459 if (type
&& typedef_type
10460 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10461 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10462 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10464 /* Detect where we're using a typedef of function type to declare a
10465 function. PARMS will not be set, so we must create it now. */
10467 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10469 tree decls
= NULL_TREE
;
10472 for (args
= TYPE_ARG_TYPES (type
);
10473 args
&& args
!= void_list_node
;
10474 args
= TREE_CHAIN (args
))
10476 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10478 DECL_CHAIN (decl
) = decls
;
10482 parms
= nreverse (decls
);
10484 if (decl_context
!= TYPENAME
)
10486 /* The qualifiers on the function type become the qualifiers on
10487 the non-static member function. */
10488 memfn_quals
|= type_memfn_quals (type
);
10489 rqual
= type_memfn_rqual (type
);
10490 type_quals
= TYPE_UNQUALIFIED
;
10494 /* If this is a type name (such as, in a cast or sizeof),
10495 compute the type and return it now. */
10497 if (decl_context
== TYPENAME
)
10499 /* Note that the grammar rejects storage classes
10500 in typenames, fields or parameters. */
10501 if (type_quals
!= TYPE_UNQUALIFIED
)
10502 type_quals
= TYPE_UNQUALIFIED
;
10504 /* Special case: "friend class foo" looks like a TYPENAME context. */
10507 if (type_quals
!= TYPE_UNQUALIFIED
)
10509 error ("type qualifiers specified for friend class declaration");
10510 type_quals
= TYPE_UNQUALIFIED
;
10514 error ("%<inline%> specified for friend class declaration");
10520 /* Don't allow friend declaration without a class-key. */
10521 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10522 permerror (input_location
, "template parameters cannot be friends");
10523 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10524 permerror (input_location
, "friend declaration requires class-key, "
10525 "i.e. %<friend class %T::%D%>",
10526 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10528 permerror (input_location
, "friend declaration requires class-key, "
10529 "i.e. %<friend %#T%>",
10533 /* Only try to do this stuff if we didn't already give up. */
10534 if (type
!= integer_type_node
)
10536 /* A friendly class? */
10537 if (current_class_type
)
10538 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10539 /*complain=*/true);
10541 error ("trying to make class %qT a friend of global scope",
10544 type
= void_type_node
;
10547 else if (memfn_quals
|| rqual
)
10549 if (ctype
== NULL_TREE
10550 && TREE_CODE (type
) == METHOD_TYPE
)
10551 ctype
= TYPE_METHOD_BASETYPE (type
);
10554 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10555 /* Core issue #547: need to allow this in template type args.
10556 Allow it in general in C++11 for alias-declarations. */
10557 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10558 && TREE_CODE (type
) == FUNCTION_TYPE
)
10559 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10561 error ("invalid qualifiers on non-member function type");
10566 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10567 && decl_context
!= CATCHPARM
10568 && TREE_CODE (type
) != UNION_TYPE
10571 error ("abstract declarator %qT used as declaration", type
);
10572 return error_mark_node
;
10575 /* Only functions may be declared using an operator-function-id. */
10577 && IDENTIFIER_OPNAME_P (unqualified_id
)
10578 && TREE_CODE (type
) != FUNCTION_TYPE
10579 && TREE_CODE (type
) != METHOD_TYPE
)
10581 error ("declaration of %qD as non-function", unqualified_id
);
10582 return error_mark_node
;
10585 /* We don't check parameter types here because we can emit a better
10586 error message later. */
10587 if (decl_context
!= PARM
)
10589 type
= check_var_type (unqualified_id
, type
);
10590 if (type
== error_mark_node
)
10591 return error_mark_node
;
10594 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10595 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10597 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10599 if (ctype
|| in_namespace
)
10600 error ("cannot use %<::%> in parameter declaration");
10602 if (type_uses_auto (type
))
10604 if (cxx_dialect
>= cxx14
)
10605 error ("%<auto%> parameter not permitted in this context");
10607 error ("parameter declared %<auto%>");
10608 type
= error_mark_node
;
10611 /* A parameter declared as an array of T is really a pointer to T.
10612 One declared as a function is really a pointer to a function.
10613 One declared as a member is really a pointer to member. */
10615 if (TREE_CODE (type
) == ARRAY_TYPE
)
10617 /* Transfer const-ness of array into that of type pointed to. */
10618 type
= build_pointer_type (TREE_TYPE (type
));
10619 type_quals
= TYPE_UNQUALIFIED
;
10620 array_parameter_p
= true;
10622 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10623 type
= build_pointer_type (type
);
10626 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10627 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10629 cp_cv_quals real_quals
= memfn_quals
;
10630 if (cxx_dialect
< cxx14
&& constexpr_p
10631 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10632 real_quals
|= TYPE_QUAL_CONST
;
10633 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10639 if (decl_context
== PARM
)
10641 decl
= cp_build_parm_decl (unqualified_id
, type
);
10642 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10644 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10645 memfn_quals
!= TYPE_UNQUALIFIED
,
10646 inlinep
, friendp
, raises
!= NULL_TREE
);
10648 else if (decl_context
== FIELD
)
10650 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10651 && type_uses_auto (type
))
10653 error ("non-static data member declared %<auto%>");
10654 type
= error_mark_node
;
10657 /* The C99 flexible array extension. */
10658 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10659 && TYPE_DOMAIN (type
) == NULL_TREE
)
10661 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10662 tf_warning_or_error
);
10663 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10666 if (type
== error_mark_node
)
10668 /* Happens when declaring arrays of sizes which
10669 are error_mark_node, for example. */
10672 else if (in_namespace
&& !friendp
)
10674 /* Something like struct S { int N::j; }; */
10675 error ("invalid use of %<::%>");
10676 return error_mark_node
;
10678 else if (TREE_CODE (type
) == FUNCTION_TYPE
10679 || TREE_CODE (type
) == METHOD_TYPE
)
10682 tree function_context
;
10686 /* This should never happen in pure C++ (the check
10687 could be an assert). It could happen in
10688 Objective-C++ if someone writes invalid code that
10689 uses a function declaration for an instance
10690 variable or property (instance variables and
10691 properties are parsed as FIELD_DECLs, but they are
10692 part of an Objective-C class, not a C++ class).
10693 That code is invalid and is caught by this
10697 error ("declaration of function %qD in invalid context",
10699 return error_mark_node
;
10702 /* ``A union may [ ... ] not [ have ] virtual functions.''
10704 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10706 error ("function %qD declared virtual inside a union",
10708 return error_mark_node
;
10711 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10715 error ("%qD cannot be declared virtual, since it "
10716 "is always static",
10723 /* Check that the name used for a destructor makes sense. */
10724 if (sfk
== sfk_destructor
)
10726 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10730 gcc_assert (friendp
);
10731 error ("expected qualified name in friend declaration "
10732 "for destructor %qD", uqname
);
10733 return error_mark_node
;
10736 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10738 error ("declaration of %qD as member of %qT",
10740 return error_mark_node
;
10744 error ("a destructor cannot be %<constexpr%>");
10745 return error_mark_node
;
10748 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10750 error ("expected qualified name in friend declaration "
10751 "for constructor %qD",
10752 id_declarator
->u
.id
.unqualified_name
);
10753 return error_mark_node
;
10756 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10758 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10759 if (variable_template_p (tmpl
))
10761 error ("specialization of variable template %qD "
10762 "declared as function", tmpl
);
10763 inform (DECL_SOURCE_LOCATION (tmpl
),
10764 "variable template declared here");
10765 return error_mark_node
;
10769 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10770 function_context
= (ctype
!= NULL_TREE
) ?
10771 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10772 publicp
= (! friendp
|| ! staticp
)
10773 && function_context
== NULL_TREE
;
10775 if (late_return_type_p
)
10776 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10778 decl
= grokfndecl (ctype
, type
,
10779 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10780 ? unqualified_id
: dname
,
10783 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10784 friendp
? -1 : 0, friendp
, publicp
,
10785 inlinep
| (2 * constexpr_p
),
10786 initialized
== SD_DELETED
, sfk
,
10787 funcdef_flag
, template_count
, in_namespace
,
10788 attrlist
, declarator
->id_loc
);
10789 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10790 if (decl
== NULL_TREE
)
10791 return error_mark_node
;
10793 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10794 /* The decl and setting of decl_attr is also turned off. */
10795 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10798 /* [class.conv.ctor]
10800 A constructor declared without the function-specifier
10801 explicit that can be called with a single parameter
10802 specifies a conversion from the type of its first
10803 parameter to the type of its class. Such a constructor
10804 is called a converting constructor. */
10805 if (explicitp
== 2)
10806 DECL_NONCONVERTING_P (decl
) = 1;
10808 else if (!staticp
&& !dependent_type_p (type
)
10809 && !COMPLETE_TYPE_P (complete_type (type
))
10810 && (TREE_CODE (type
) != ARRAY_TYPE
10811 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10812 || initialized
== 0))
10814 if (unqualified_id
)
10816 error ("field %qD has incomplete type %qT",
10817 unqualified_id
, type
);
10818 cxx_incomplete_type_inform (strip_array_types (type
));
10821 error ("name %qT has incomplete type", type
);
10823 type
= error_mark_node
;
10830 error ("%qE is neither function nor member function; "
10831 "cannot be declared friend", unqualified_id
);
10839 /* Friends are treated specially. */
10840 if (ctype
== current_class_type
)
10841 ; /* We already issued a permerror. */
10842 else if (decl
&& DECL_NAME (decl
))
10844 if (template_class_depth (current_class_type
) == 0)
10846 decl
= check_explicit_specialization
10847 (unqualified_id
, decl
, template_count
,
10848 2 * funcdef_flag
+ 4);
10849 if (decl
== error_mark_node
)
10850 return error_mark_node
;
10853 decl
= do_friend (ctype
, unqualified_id
, decl
,
10859 return error_mark_node
;
10862 /* Structure field. It may not be a function, except for C++. */
10864 if (decl
== NULL_TREE
)
10868 /* C++ allows static class members. All other work
10869 for this is done by grokfield. */
10870 decl
= build_lang_decl_loc (declarator
10871 ? declarator
->id_loc
10873 VAR_DECL
, unqualified_id
, type
);
10874 set_linkage_for_static_data_member (decl
);
10875 /* Even if there is an in-class initialization, DECL
10876 is considered undefined until an out-of-class
10877 definition is provided. */
10878 DECL_EXTERNAL (decl
) = 1;
10882 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10883 if (declspecs
->gnu_thread_keyword_p
)
10884 DECL_GNU_TLS_P (decl
) = true;
10887 if (constexpr_p
&& !initialized
)
10889 error ("constexpr static data member %qD must have an "
10890 "initializer", decl
);
10891 constexpr_p
= false;
10898 error ("non-static data member %qE declared %<constexpr%>",
10900 constexpr_p
= false;
10902 decl
= build_decl (input_location
,
10903 FIELD_DECL
, unqualified_id
, type
);
10904 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10905 if (bitfield
&& !unqualified_id
)
10906 TREE_NO_WARNING (decl
) = 1;
10908 if (storage_class
== sc_mutable
)
10910 DECL_MUTABLE_P (decl
) = 1;
10911 storage_class
= sc_none
;
10916 /* An attempt is being made to initialize a non-static
10917 member. This is new in C++11. */
10918 maybe_warn_cpp0x (CPP0X_NSDMI
);
10920 /* If this has been parsed with static storage class, but
10921 errors forced staticp to be cleared, ensure NSDMI is
10923 if (declspecs
->storage_class
== sc_static
)
10924 DECL_INITIAL (decl
) = error_mark_node
;
10928 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10929 memfn_quals
!= TYPE_UNQUALIFIED
,
10930 inlinep
, friendp
, raises
!= NULL_TREE
);
10933 else if (TREE_CODE (type
) == FUNCTION_TYPE
10934 || TREE_CODE (type
) == METHOD_TYPE
)
10936 tree original_name
;
10939 if (!unqualified_id
)
10940 return error_mark_node
;
10942 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10943 original_name
= dname
;
10945 original_name
= unqualified_id
;
10947 if (storage_class
== sc_auto
)
10948 error ("storage class %<auto%> invalid for function %qs", name
);
10949 else if (storage_class
== sc_register
)
10950 error ("storage class %<register%> invalid for function %qs", name
);
10953 if (declspecs
->gnu_thread_keyword_p
)
10954 error ("storage class %<__thread%> invalid for function %qs",
10957 error ("storage class %<thread_local%> invalid for function %qs",
10961 if (virt_specifiers
)
10962 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10963 /* Function declaration not at top level.
10964 Storage classes other than `extern' are not allowed
10965 and `extern' makes no difference. */
10966 if (! toplevel_bindings_p ()
10967 && (storage_class
== sc_static
10968 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10971 if (storage_class
== sc_static
)
10972 pedwarn (input_location
, OPT_Wpedantic
,
10973 "%<static%> specified invalid for function %qs "
10974 "declared out of global scope", name
);
10976 pedwarn (input_location
, OPT_Wpedantic
,
10977 "%<inline%> specifier invalid for function %qs "
10978 "declared out of global scope", name
);
10981 if (ctype
== NULL_TREE
)
10985 error ("virtual non-class function %qs", name
);
10988 else if (sfk
== sfk_constructor
10989 || sfk
== sfk_destructor
)
10991 error (funcdef_flag
10992 ? G_("%qs defined in a non-class scope")
10993 : G_("%qs declared in a non-class scope"), name
);
10998 /* Record whether the function is public. */
10999 publicp
= (ctype
!= NULL_TREE
11000 || storage_class
!= sc_static
);
11002 if (late_return_type_p
)
11003 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11005 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
11006 virtualp
, flags
, memfn_quals
, rqual
, raises
,
11008 publicp
, inlinep
| (2 * constexpr_p
),
11009 initialized
== SD_DELETED
, sfk
,
11011 template_count
, in_namespace
, attrlist
,
11012 declarator
->id_loc
);
11013 if (decl
== NULL_TREE
)
11014 return error_mark_node
;
11018 int invalid_static
= 0;
11020 /* Don't allow a static member function in a class, and forbid
11021 declaring main to be static. */
11022 if (TREE_CODE (type
) == METHOD_TYPE
)
11024 permerror (input_location
, "cannot declare member function %qD to have "
11025 "static linkage", decl
);
11026 invalid_static
= 1;
11028 else if (current_function_decl
)
11030 /* FIXME need arm citation */
11031 error ("cannot declare static function inside another function");
11032 invalid_static
= 1;
11035 if (invalid_static
)
11038 storage_class
= sc_none
;
11044 /* It's a variable. */
11046 /* An uninitialized decl with `extern' is a reference. */
11047 decl
= grokvardecl (type
, dname
, unqualified_id
,
11050 (type_quals
& TYPE_QUAL_CONST
) != 0,
11052 ctype
? ctype
: in_namespace
);
11053 if (decl
== NULL_TREE
)
11054 return error_mark_node
;
11056 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11057 memfn_quals
!= TYPE_UNQUALIFIED
,
11058 inlinep
, friendp
, raises
!= NULL_TREE
);
11062 DECL_CONTEXT (decl
) = ctype
;
11065 permerror (input_location
, "%<static%> may not be used when defining "
11066 "(as opposed to declaring) a static data member");
11068 storage_class
= sc_none
;
11070 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11072 error ("static member %qD declared %<register%>", decl
);
11073 storage_class
= sc_none
;
11075 if (storage_class
== sc_extern
&& pedantic
)
11077 pedwarn (input_location
, OPT_Wpedantic
,
11078 "cannot explicitly declare member %q#D to have "
11079 "extern linkage", decl
);
11080 storage_class
= sc_none
;
11083 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11085 error ("declaration of constexpr variable %qD is not a definition",
11087 constexpr_p
= false;
11091 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11093 if (toplevel_bindings_p ())
11095 /* It's common practice (and completely valid) to have a const
11096 be initialized and declared extern. */
11097 if (!(type_quals
& TYPE_QUAL_CONST
))
11098 warning (0, "%qs initialized and declared %<extern%>", name
);
11102 error ("%qs has both %<extern%> and initializer", name
);
11103 return error_mark_node
;
11107 /* Record `register' declaration for warnings on &
11108 and in case doing stupid register allocation. */
11110 if (storage_class
== sc_register
)
11111 DECL_REGISTER (decl
) = 1;
11112 else if (storage_class
== sc_extern
)
11113 DECL_THIS_EXTERN (decl
) = 1;
11114 else if (storage_class
== sc_static
)
11115 DECL_THIS_STATIC (decl
) = 1;
11117 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11118 if (constexpr_p
&& VAR_P (decl
))
11119 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11121 /* Record constancy and volatility on the DECL itself . There's
11122 no need to do this when processing a template; we'll do this
11123 for the instantiated declaration based on the type of DECL. */
11124 if (!processing_template_decl
)
11125 cp_apply_type_quals_to_decl (type_quals
, decl
);
11131 /* Subroutine of start_function. Ensure that each of the parameter
11132 types (as listed in PARMS) is complete, as is required for a
11133 function definition. */
11136 require_complete_types_for_parms (tree parms
)
11138 for (; parms
; parms
= DECL_CHAIN (parms
))
11140 if (dependent_type_p (TREE_TYPE (parms
)))
11142 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11143 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11145 relayout_decl (parms
);
11146 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11149 /* grokparms or complete_type_or_else will have already issued
11151 TREE_TYPE (parms
) = error_mark_node
;
11155 /* Returns nonzero if T is a local variable. */
11158 local_variable_p (const_tree t
)
11161 /* A VAR_DECL with a context that is a _TYPE is a static data
11163 && !TYPE_P (CP_DECL_CONTEXT (t
))
11164 /* Any other non-local variable must be at namespace scope. */
11165 && !DECL_NAMESPACE_SCOPE_P (t
))
11166 || (TREE_CODE (t
) == PARM_DECL
))
11172 /* Like local_variable_p, but suitable for use as a tree-walking
11176 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11179 if (local_variable_p (*tp
)
11180 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11182 else if (TYPE_P (*tp
))
11183 *walk_subtrees
= 0;
11188 /* Check that ARG, which is a default-argument expression for a
11189 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11190 something goes wrong. DECL may also be a _TYPE node, rather than a
11191 DECL, if there is no DECL available. */
11194 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11199 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11200 /* We get a DEFAULT_ARG when looking at an in-class declaration
11201 with a default argument. Ignore the argument for now; we'll
11202 deal with it after the class is complete. */
11211 decl_type
= TREE_TYPE (decl
);
11213 if (arg
== error_mark_node
11214 || decl
== error_mark_node
11215 || TREE_TYPE (arg
) == error_mark_node
11216 || decl_type
== error_mark_node
)
11217 /* Something already went wrong. There's no need to check
11219 return error_mark_node
;
11221 /* [dcl.fct.default]
11223 A default argument expression is implicitly converted to the
11225 ++cp_unevaluated_operand
;
11226 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11228 --cp_unevaluated_operand
;
11230 if (warn_zero_as_null_pointer_constant
11231 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11232 && null_ptr_cst_p (arg
)
11233 && (complain
& tf_warning
)
11234 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11235 return nullptr_node
;
11237 /* [dcl.fct.default]
11239 Local variables shall not be used in default argument
11242 The keyword `this' shall not be used in a default argument of a
11243 member function. */
11244 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11247 if (complain
& tf_warning_or_error
)
11249 if (DECL_NAME (var
) == this_identifier
)
11250 permerror (input_location
, "default argument %qE uses %qD",
11253 error ("default argument %qE uses local variable %qD", arg
, var
);
11255 return error_mark_node
;
11262 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11265 type_is_deprecated (tree type
)
11267 enum tree_code code
;
11268 if (TREE_DEPRECATED (type
))
11270 if (TYPE_NAME (type
)
11271 && TREE_DEPRECATED (TYPE_NAME (type
)))
11274 /* Do warn about using typedefs to a deprecated class. */
11275 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11276 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11278 code
= TREE_CODE (type
);
11280 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11281 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11282 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11283 return type_is_deprecated (TREE_TYPE (type
));
11285 if (TYPE_PTRMEMFUNC_P (type
))
11286 return type_is_deprecated
11287 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11292 /* Decode the list of parameter types for a function type.
11293 Given the list of things declared inside the parens,
11294 return a list of types.
11296 If this parameter does not end with an ellipsis, we append
11299 *PARMS is set to the chain of PARM_DECLs created. */
11302 grokparms (tree parmlist
, tree
*parms
)
11304 tree result
= NULL_TREE
;
11305 tree decls
= NULL_TREE
;
11309 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11311 tree type
= NULL_TREE
;
11312 tree init
= TREE_PURPOSE (parm
);
11313 tree decl
= TREE_VALUE (parm
);
11314 const char *errmsg
;
11316 if (parm
== void_list_node
)
11319 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11322 type
= TREE_TYPE (decl
);
11323 if (VOID_TYPE_P (type
))
11325 if (same_type_p (type
, void_type_node
)
11327 && !DECL_NAME (decl
) && !result
11328 && TREE_CHAIN (parm
) == void_list_node
)
11329 /* DR 577: A parameter list consisting of a single
11330 unnamed parameter of non-dependent type 'void'. */
11332 else if (cv_qualified_p (type
))
11333 error_at (DECL_SOURCE_LOCATION (decl
),
11334 "invalid use of cv-qualified type %qT in "
11335 "parameter declaration", type
);
11337 error_at (DECL_SOURCE_LOCATION (decl
),
11338 "invalid use of type %<void%> in parameter "
11340 /* It's not a good idea to actually create parameters of
11341 type `void'; other parts of the compiler assume that a
11342 void type terminates the parameter list. */
11343 type
= error_mark_node
;
11344 TREE_TYPE (decl
) = error_mark_node
;
11347 if (type
!= error_mark_node
11348 && TYPE_FOR_JAVA (type
)
11349 && MAYBE_CLASS_TYPE_P (type
))
11351 error ("parameter %qD has Java class type", decl
);
11352 type
= error_mark_node
;
11353 TREE_TYPE (decl
) = error_mark_node
;
11357 if (type
!= error_mark_node
11358 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11361 type
= error_mark_node
;
11362 TREE_TYPE (decl
) = error_mark_node
;
11365 if (type
!= error_mark_node
)
11367 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11369 tree deptype
= type_is_deprecated (type
);
11371 warn_deprecated_use (deptype
, NULL_TREE
);
11374 /* Top-level qualifiers on the parameters are
11375 ignored for function types. */
11376 type
= cp_build_qualified_type (type
, 0);
11377 if (TREE_CODE (type
) == METHOD_TYPE
)
11379 error ("parameter %qD invalidly declared method type", decl
);
11380 type
= build_pointer_type (type
);
11381 TREE_TYPE (decl
) = type
;
11383 else if (abstract_virtuals_error (decl
, type
))
11384 any_error
= 1; /* Seems like a good idea. */
11385 else if (POINTER_TYPE_P (type
))
11387 /* [dcl.fct]/6, parameter types cannot contain pointers
11388 (references) to arrays of unknown bound. */
11389 tree t
= TREE_TYPE (type
);
11390 int ptr
= TYPE_PTR_P (type
);
11394 if (TYPE_PTR_P (t
))
11396 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11398 else if (!TYPE_DOMAIN (t
))
11402 if (TREE_CODE (t
) == ARRAY_TYPE
)
11404 ? G_("parameter %qD includes pointer to array of "
11405 "unknown bound %qT")
11406 : G_("parameter %qD includes reference to array of "
11407 "unknown bound %qT"),
11413 else if (init
&& !processing_template_decl
)
11414 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11417 DECL_CHAIN (decl
) = decls
;
11419 result
= tree_cons (init
, type
, result
);
11421 decls
= nreverse (decls
);
11422 result
= nreverse (result
);
11424 result
= chainon (result
, void_list_node
);
11431 /* D is a constructor or overloaded `operator='.
11433 Let T be the class in which D is declared. Then, this function
11436 -1 if D's is an ill-formed constructor or copy assignment operator
11437 whose first parameter is of type `T'.
11438 0 if D is not a copy constructor or copy assignment
11440 1 if D is a copy constructor or copy assignment operator whose
11441 first parameter is a reference to non-const qualified T.
11442 2 if D is a copy constructor or copy assignment operator whose
11443 first parameter is a reference to const qualified T.
11445 This function can be used as a predicate. Positive values indicate
11446 a copy constructor and nonzero values indicate a copy assignment
11450 copy_fn_p (const_tree d
)
11456 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11458 if (TREE_CODE (d
) == TEMPLATE_DECL
11459 || (DECL_TEMPLATE_INFO (d
)
11460 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11461 /* Instantiations of template member functions are never copy
11462 functions. Note that member functions of templated classes are
11463 represented as template functions internally, and we must
11464 accept those as copy functions. */
11467 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11471 arg_type
= TREE_VALUE (args
);
11472 if (arg_type
== error_mark_node
)
11475 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11477 /* Pass by value copy assignment operator. */
11480 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11481 && !TYPE_REF_IS_RVALUE (arg_type
)
11482 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11484 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11490 args
= TREE_CHAIN (args
);
11492 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11493 /* There are more non-optional args. */
11499 /* D is a constructor or overloaded `operator='.
11501 Let T be the class in which D is declared. Then, this function
11502 returns true when D is a move constructor or move assignment
11503 operator, false otherwise. */
11506 move_fn_p (const_tree d
)
11508 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11510 if (cxx_dialect
== cxx98
)
11511 /* There are no move constructors if we are in C++98 mode. */
11514 if (TREE_CODE (d
) == TEMPLATE_DECL
11515 || (DECL_TEMPLATE_INFO (d
)
11516 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11517 /* Instantiations of template member functions are never move
11518 functions. Note that member functions of templated classes are
11519 represented as template functions internally, and we must
11520 accept those as move functions. */
11523 return move_signature_fn_p (d
);
11526 /* D is a constructor or overloaded `operator='.
11528 Then, this function returns true when D has the same signature as a move
11529 constructor or move assignment operator (because either it is such a
11530 ctor/op= or it is a template specialization with the same signature),
11531 false otherwise. */
11534 move_signature_fn_p (const_tree d
)
11538 bool result
= false;
11540 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11544 arg_type
= TREE_VALUE (args
);
11545 if (arg_type
== error_mark_node
)
11548 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11549 && TYPE_REF_IS_RVALUE (arg_type
)
11550 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11554 args
= TREE_CHAIN (args
);
11556 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11557 /* There are more non-optional args. */
11563 /* Remember any special properties of member function DECL. */
11566 grok_special_member_properties (tree decl
)
11570 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11573 class_type
= DECL_CONTEXT (decl
);
11574 if (DECL_CONSTRUCTOR_P (decl
))
11576 int ctor
= copy_fn_p (decl
);
11578 if (!DECL_ARTIFICIAL (decl
))
11579 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11585 A non-template constructor for class X is a copy
11586 constructor if its first parameter is of type X&, const
11587 X&, volatile X& or const volatile X&, and either there
11588 are no other parameters or else all other parameters have
11589 default arguments. */
11590 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11591 if (user_provided_p (decl
))
11592 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11594 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11596 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11597 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11598 else if (move_fn_p (decl
) && user_provided_p (decl
))
11599 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11600 else if (is_list_ctor (decl
))
11601 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11603 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11604 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11605 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11607 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11611 A non-template assignment operator for class X is a copy
11612 assignment operator if its parameter is of type X, X&, const
11613 X&, volatile X& or const volatile X&. */
11615 int assop
= copy_fn_p (decl
);
11619 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11620 if (user_provided_p (decl
))
11621 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11623 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11625 else if (move_fn_p (decl
) && user_provided_p (decl
))
11626 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11628 /* Destructors are handled in check_methods. */
11631 /* Check a constructor DECL has the correct form. Complains
11632 if the class has a constructor of the form X(X). */
11635 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11637 int ctor_parm
= copy_fn_p (decl
);
11643 A declaration of a constructor for a class X is ill-formed if
11644 its first parameter is of type (optionally cv-qualified) X
11645 and either there are no other parameters or else all other
11646 parameters have default arguments.
11648 We *don't* complain about member template instantiations that
11649 have this form, though; they can occur as we try to decide
11650 what constructor to use during overload resolution. Since
11651 overload resolution will never prefer such a constructor to
11652 the non-template copy constructor (which is either explicitly
11653 or implicitly defined), there's no need to worry about their
11654 existence. Theoretically, they should never even be
11655 instantiated, but that's hard to forestall. */
11656 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11664 /* An operator with this code is unary, but can also be binary. */
11667 ambi_op_p (enum tree_code code
)
11669 return (code
== INDIRECT_REF
11670 || code
== ADDR_EXPR
11671 || code
== UNARY_PLUS_EXPR
11672 || code
== NEGATE_EXPR
11673 || code
== PREINCREMENT_EXPR
11674 || code
== PREDECREMENT_EXPR
);
11677 /* An operator with this name can only be unary. */
11680 unary_op_p (enum tree_code code
)
11682 return (code
== TRUTH_NOT_EXPR
11683 || code
== BIT_NOT_EXPR
11684 || code
== COMPONENT_REF
11685 || code
== TYPE_EXPR
);
11688 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11689 errors are issued for invalid declarations. */
11692 grok_op_properties (tree decl
, bool complain
)
11694 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11696 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11697 tree name
= DECL_NAME (decl
);
11698 enum tree_code operator_code
;
11703 /* Count the number of arguments and check for ellipsis. */
11704 for (argtype
= argtypes
, arity
= 0;
11705 argtype
&& argtype
!= void_list_node
;
11706 argtype
= TREE_CHAIN (argtype
))
11708 ellipsis_p
= !argtype
;
11710 class_type
= DECL_CONTEXT (decl
);
11711 if (class_type
&& !CLASS_TYPE_P (class_type
))
11712 class_type
= NULL_TREE
;
11714 if (DECL_CONV_FN_P (decl
))
11715 operator_code
= TYPE_EXPR
;
11719 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11720 if (ansi_opname (CODE) == name) \
11722 operator_code = (CODE); \
11725 else if (ansi_assopname (CODE) == name) \
11727 operator_code = (CODE); \
11728 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11732 #include "operators.def"
11733 #undef DEF_OPERATOR
11735 gcc_unreachable ();
11738 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11739 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11742 switch (operator_code
)
11745 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11749 TYPE_GETS_DELETE (class_type
) |= 1;
11753 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11756 case VEC_DELETE_EXPR
:
11757 TYPE_GETS_DELETE (class_type
) |= 2;
11764 /* [basic.std.dynamic.allocation]/1:
11766 A program is ill-formed if an allocation function is declared
11767 in a namespace scope other than global scope or declared static
11770 The same also holds true for deallocation functions. */
11771 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11772 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11774 if (DECL_NAMESPACE_SCOPE_P (decl
))
11776 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11778 error ("%qD may not be declared within a namespace", decl
);
11781 else if (!TREE_PUBLIC (decl
))
11783 error ("%qD may not be declared as static", decl
);
11786 if (!flag_sized_deallocation
&& warn_cxx14_compat
)
11788 tree parm
= FUNCTION_ARG_CHAIN (decl
);
11789 if (parm
&& same_type_p (TREE_VALUE (parm
), size_type_node
)
11790 && TREE_CHAIN (parm
) == void_list_node
)
11791 warning_at (DECL_SOURCE_LOCATION (decl
), OPT_Wc__14_compat
,
11792 "%qD is a usual (non-placement) deallocation "
11793 "function in C++14 (or with -fsized-deallocation)",
11799 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11801 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11802 DECL_IS_OPERATOR_NEW (decl
) = 1;
11804 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11805 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11808 /* An operator function must either be a non-static member function
11809 or have at least one parameter of a class, a reference to a class,
11810 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11811 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11813 if (operator_code
== TYPE_EXPR
11814 || operator_code
== CALL_EXPR
11815 || operator_code
== COMPONENT_REF
11816 || operator_code
== ARRAY_REF
11817 || operator_code
== NOP_EXPR
)
11819 error ("%qD must be a nonstatic member function", decl
);
11826 if (DECL_STATIC_FUNCTION_P (decl
))
11828 error ("%qD must be either a non-static member "
11829 "function or a non-member function", decl
);
11833 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11835 tree arg
= non_reference (TREE_VALUE (p
));
11836 if (arg
== error_mark_node
)
11839 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11840 because these checks are performed even on
11841 template functions. */
11842 if (MAYBE_CLASS_TYPE_P (arg
)
11843 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11847 if (!p
|| p
== void_list_node
)
11850 error ("%qD must have an argument of class or "
11851 "enumerated type", decl
);
11857 /* There are no restrictions on the arguments to an overloaded
11859 if (operator_code
== CALL_EXPR
)
11862 /* Warn about conversion operators that will never be used. */
11863 if (IDENTIFIER_TYPENAME_P (name
)
11864 && ! DECL_TEMPLATE_INFO (decl
)
11866 /* Warn only declaring the function; there is no need to
11867 warn again about out-of-class definitions. */
11868 && class_type
== current_class_type
)
11870 tree t
= TREE_TYPE (name
);
11871 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11874 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11876 if (VOID_TYPE_P (t
))
11877 warning (OPT_Wconversion
,
11879 ? G_("conversion to a reference to void "
11880 "will never use a type conversion operator")
11881 : G_("conversion to void "
11882 "will never use a type conversion operator"));
11883 else if (class_type
)
11885 if (t
== class_type
)
11886 warning (OPT_Wconversion
,
11888 ? G_("conversion to a reference to the same type "
11889 "will never use a type conversion operator")
11890 : G_("conversion to the same type "
11891 "will never use a type conversion operator"));
11892 /* Don't force t to be complete here. */
11893 else if (MAYBE_CLASS_TYPE_P (t
)
11894 && COMPLETE_TYPE_P (t
)
11895 && DERIVED_FROM_P (t
, class_type
))
11896 warning (OPT_Wconversion
,
11898 ? G_("conversion to a reference to a base class "
11899 "will never use a type conversion operator")
11900 : G_("conversion to a base class "
11901 "will never use a type conversion operator"));
11906 if (operator_code
== COND_EXPR
)
11909 error ("ISO C++ prohibits overloading operator ?:");
11912 else if (ellipsis_p
)
11914 error ("%qD must not have variable number of arguments", decl
);
11917 else if (ambi_op_p (operator_code
))
11920 /* We pick the one-argument operator codes by default, so
11921 we don't have to change anything. */
11923 else if (arity
== 2)
11925 /* If we thought this was a unary operator, we now know
11926 it to be a binary operator. */
11927 switch (operator_code
)
11930 operator_code
= MULT_EXPR
;
11934 operator_code
= BIT_AND_EXPR
;
11937 case UNARY_PLUS_EXPR
:
11938 operator_code
= PLUS_EXPR
;
11942 operator_code
= MINUS_EXPR
;
11945 case PREINCREMENT_EXPR
:
11946 operator_code
= POSTINCREMENT_EXPR
;
11949 case PREDECREMENT_EXPR
:
11950 operator_code
= POSTDECREMENT_EXPR
;
11954 gcc_unreachable ();
11957 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11959 if ((operator_code
== POSTINCREMENT_EXPR
11960 || operator_code
== POSTDECREMENT_EXPR
)
11961 && ! processing_template_decl
11962 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11965 error ("postfix %qD must take %<int%> as its argument",
11968 error ("postfix %qD must take %<int%> as its second "
11976 error ("%qD must take either zero or one argument", decl
);
11978 error ("%qD must take either one or two arguments", decl
);
11982 /* More Effective C++ rule 6. */
11984 && (operator_code
== POSTINCREMENT_EXPR
11985 || operator_code
== POSTDECREMENT_EXPR
11986 || operator_code
== PREINCREMENT_EXPR
11987 || operator_code
== PREDECREMENT_EXPR
))
11989 tree arg
= TREE_VALUE (argtypes
);
11990 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11991 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11992 arg
= TREE_TYPE (arg
);
11993 arg
= TYPE_MAIN_VARIANT (arg
);
11994 if (operator_code
== PREINCREMENT_EXPR
11995 || operator_code
== PREDECREMENT_EXPR
)
11997 if (TREE_CODE (ret
) != REFERENCE_TYPE
11998 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
12000 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
12001 build_reference_type (arg
));
12005 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
12006 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
12010 else if (unary_op_p (operator_code
))
12015 error ("%qD must take %<void%>", decl
);
12017 error ("%qD must take exactly one argument", decl
);
12021 else /* if (binary_op_p (operator_code)) */
12026 error ("%qD must take exactly one argument", decl
);
12028 error ("%qD must take exactly two arguments", decl
);
12032 /* More Effective C++ rule 7. */
12034 && (operator_code
== TRUTH_ANDIF_EXPR
12035 || operator_code
== TRUTH_ORIF_EXPR
12036 || operator_code
== COMPOUND_EXPR
))
12037 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12041 /* Effective C++ rule 23. */
12044 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12045 && (operator_code
== PLUS_EXPR
12046 || operator_code
== MINUS_EXPR
12047 || operator_code
== TRUNC_DIV_EXPR
12048 || operator_code
== MULT_EXPR
12049 || operator_code
== TRUNC_MOD_EXPR
)
12050 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12051 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12053 /* [over.oper]/8 */
12054 for (; argtypes
&& argtypes
!= void_list_node
;
12055 argtypes
= TREE_CHAIN (argtypes
))
12056 if (TREE_PURPOSE (argtypes
))
12058 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12059 if (operator_code
== POSTINCREMENT_EXPR
12060 || operator_code
== POSTDECREMENT_EXPR
)
12062 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12067 error ("%qD cannot have default arguments", decl
);
12075 /* Return a string giving the keyword associate with CODE. */
12077 static const char *
12078 tag_name (enum tag_types code
)
12090 case typename_type
:
12093 gcc_unreachable ();
12097 /* Name lookup in an elaborated-type-specifier (after the keyword
12098 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12099 elaborated-type-specifier is invalid, issue a diagnostic and return
12100 error_mark_node; otherwise, return the *_TYPE to which it referred.
12101 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12104 check_elaborated_type_specifier (enum tag_types tag_code
,
12106 bool allow_template_p
)
12112 struct S { struct S *p; };
12114 name lookup will find the TYPE_DECL for the implicit "S::S"
12115 typedef. Adjust for that here. */
12116 if (DECL_SELF_REFERENCE_P (decl
))
12117 decl
= TYPE_NAME (TREE_TYPE (decl
));
12119 type
= TREE_TYPE (decl
);
12121 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12122 is false for this case as well. */
12123 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12125 error ("using template type parameter %qT after %qs",
12126 type
, tag_name (tag_code
));
12127 return error_mark_node
;
12129 /* Accept template template parameters. */
12130 else if (allow_template_p
12131 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12132 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12136 If the identifier resolves to a typedef-name or the
12137 simple-template-id resolves to an alias template
12138 specialization, the elaborated-type-specifier is ill-formed.
12140 In other words, the only legitimate declaration to use in the
12141 elaborated type specifier is the implicit typedef created when
12142 the type is declared. */
12143 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12144 && !DECL_SELF_REFERENCE_P (decl
)
12145 && tag_code
!= typename_type
)
12147 if (alias_template_specialization_p (type
))
12148 error ("using alias template specialization %qT after %qs",
12149 type
, tag_name (tag_code
));
12151 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12152 inform (DECL_SOURCE_LOCATION (decl
),
12153 "%qD has a previous declaration here", decl
);
12154 return error_mark_node
;
12156 else if (TREE_CODE (type
) != RECORD_TYPE
12157 && TREE_CODE (type
) != UNION_TYPE
12158 && tag_code
!= enum_type
12159 && tag_code
!= typename_type
)
12161 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12162 inform (input_location
, "%q+T has a previous declaration here", type
);
12163 return error_mark_node
;
12165 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12166 && tag_code
== enum_type
)
12168 error ("%qT referred to as enum", type
);
12169 inform (input_location
, "%q+T has a previous declaration here", type
);
12170 return error_mark_node
;
12172 else if (!allow_template_p
12173 && TREE_CODE (type
) == RECORD_TYPE
12174 && CLASSTYPE_IS_TEMPLATE (type
))
12176 /* If a class template appears as elaborated type specifier
12177 without a template header such as:
12179 template <class T> class C {};
12180 void f(class C); // No template header here
12182 then the required template argument is missing. */
12183 error ("template argument required for %<%s %T%>",
12184 tag_name (tag_code
),
12185 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12186 return error_mark_node
;
12192 /* Lookup NAME in elaborate type specifier in scope according to
12193 SCOPE and issue diagnostics if necessary.
12194 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12195 found, and ERROR_MARK_NODE for type error. */
12198 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12199 tag_scope scope
, bool template_header_p
)
12203 if (scope
== ts_global
)
12205 /* First try ordinary name lookup, ignoring hidden class name
12206 injected via friend declaration. */
12207 decl
= lookup_name_prefer_type (name
, 2);
12208 /* If that fails, the name will be placed in the smallest
12209 non-class, non-function-prototype scope according to 3.3.1/5.
12210 We may already have a hidden name declared as friend in this
12211 scope. So lookup again but not ignoring hidden names.
12212 If we find one, that name will be made visible rather than
12213 creating a new tag. */
12215 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12218 decl
= lookup_type_scope (name
, scope
);
12221 && (DECL_CLASS_TEMPLATE_P (decl
)
12222 /* If scope is ts_current we're defining a class, so ignore a
12223 template template parameter. */
12224 || (scope
!= ts_current
12225 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12226 decl
= DECL_TEMPLATE_RESULT (decl
);
12228 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12230 /* Look for invalid nested type:
12234 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12236 error ("%qD has the same name as the class in which it is "
12239 return error_mark_node
;
12242 /* Two cases we need to consider when deciding if a class
12243 template is allowed as an elaborated type specifier:
12244 1. It is a self reference to its own class.
12245 2. It comes with a template header.
12249 template <class T> class C {
12250 class C *c1; // DECL_SELF_REFERENCE_P is true
12253 template <class U> class C; // template_header_p is true
12254 template <class T> class C<T>::D {
12255 class C *c2; // DECL_SELF_REFERENCE_P is true
12258 t
= check_elaborated_type_specifier (tag_code
,
12261 | DECL_SELF_REFERENCE_P (decl
));
12264 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12266 error ("reference to %qD is ambiguous", name
);
12267 print_candidates (decl
);
12268 return error_mark_node
;
12274 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12275 Define the tag as a forward-reference if it is not defined.
12277 If a declaration is given, process it here, and report an error if
12278 multiple declarations are not identical.
12280 SCOPE is TS_CURRENT when this is also a definition. Only look in
12281 the current frame for the name (since C++ allows new names in any
12282 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12283 declaration. Only look beginning from the current scope outward up
12284 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12286 TEMPLATE_HEADER_P is true when this declaration is preceded by
12287 a set of template parameters. */
12290 xref_tag_1 (enum tag_types tag_code
, tree name
,
12291 tag_scope orig_scope
, bool template_header_p
)
12293 enum tree_code code
;
12295 tree context
= NULL_TREE
;
12298 gcc_assert (identifier_p (name
));
12304 code
= RECORD_TYPE
;
12310 code
= ENUMERAL_TYPE
;
12313 gcc_unreachable ();
12316 if (orig_scope
== ts_lambda
)
12317 scope
= ts_current
;
12319 scope
= orig_scope
;
12321 /* In case of anonymous name, xref_tag is only called to
12322 make type node and push name. Name lookup is not required. */
12323 if (ANON_AGGRNAME_P (name
))
12326 t
= lookup_and_check_tag (tag_code
, name
,
12327 scope
, template_header_p
);
12329 if (t
== error_mark_node
)
12330 return error_mark_node
;
12332 if (scope
!= ts_current
&& t
&& current_class_type
12333 && template_class_depth (current_class_type
)
12334 && template_header_p
)
12336 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12339 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12340 definition of this tag. Since, in addition, we are currently
12341 processing a (member) template declaration of a template
12342 class, we must be very careful; consider:
12349 { template <class V>
12350 friend struct S1; };
12352 Here, the S2::S1 declaration should not be confused with the
12353 outer declaration. In particular, the inner version should
12354 have a template parameter of level 2, not level 1. This
12355 would be particularly important if the member declaration
12358 template <class V = U> friend struct S1;
12360 say, when we should tsubst into `U' when instantiating
12361 S2. On the other hand, when presented with:
12371 we must find the inner binding eventually. We
12372 accomplish this by making sure that the new type we
12373 create to represent this declaration has the right
12375 context
= TYPE_CONTEXT (t
);
12381 /* If no such tag is yet defined, create a forward-reference node
12382 and record it as the "definition".
12383 When a real declaration of this type is found,
12384 the forward-reference will be altered into a real type. */
12385 if (code
== ENUMERAL_TYPE
)
12387 error ("use of enum %q#D without previous declaration", name
);
12388 return error_mark_node
;
12392 t
= make_class_type (code
);
12393 TYPE_CONTEXT (t
) = context
;
12394 if (orig_scope
== ts_lambda
)
12395 /* Remember that we're declaring a lambda to avoid bogus errors
12396 in push_template_decl. */
12397 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12398 t
= pushtag (name
, t
, scope
);
12403 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12405 if (!redeclare_class_template (t
, current_template_parms
))
12406 return error_mark_node
;
12408 else if (!processing_template_decl
12409 && CLASS_TYPE_P (t
)
12410 && CLASSTYPE_IS_TEMPLATE (t
))
12412 error ("redeclaration of %qT as a non-template", t
);
12413 error ("previous declaration %q+D", t
);
12414 return error_mark_node
;
12417 /* Make injected friend class visible. */
12418 if (scope
!= ts_within_enclosing_non_class
12419 && hidden_name_p (TYPE_NAME (t
)))
12421 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12422 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12424 if (TYPE_TEMPLATE_INFO (t
))
12426 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12427 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12435 /* Wrapper for xref_tag_1. */
12438 xref_tag (enum tag_types tag_code
, tree name
,
12439 tag_scope scope
, bool template_header_p
)
12443 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12444 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12445 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12451 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12453 enum tag_types tag_kind
;
12455 if (TREE_CODE (old
) == RECORD_TYPE
)
12456 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12458 tag_kind
= union_type
;
12460 if (id
== NULL_TREE
)
12461 id
= TYPE_IDENTIFIER (old
);
12463 return xref_tag (tag_kind
, id
, scope
, false);
12466 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12467 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12468 access_* node, and the TREE_VALUE is the type of the base-class.
12469 Non-NULL TREE_TYPE indicates virtual inheritance.
12471 Returns true if the binfo hierarchy was successfully created,
12472 false if an error was detected. */
12475 xref_basetypes (tree ref
, tree base_list
)
12478 tree binfo
, base_binfo
;
12479 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12480 unsigned max_bases
= 0; /* Maximum direct bases. */
12482 tree default_access
;
12483 tree igo_prev
; /* Track Inheritance Graph Order. */
12485 if (ref
== error_mark_node
)
12488 /* The base of a derived class is private by default, all others are
12490 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12491 && CLASSTYPE_DECLARED_CLASS (ref
)
12492 ? access_private_node
: access_public_node
);
12494 /* First, make sure that any templates in base-classes are
12495 instantiated. This ensures that if we call ourselves recursively
12496 we do not get confused about which classes are marked and which
12498 basep
= &base_list
;
12501 tree basetype
= TREE_VALUE (*basep
);
12503 /* The dependent_type_p call below should really be dependent_scope_p
12504 so that we give a hard error about using an incomplete type as a
12505 base, but we allow it with a pedwarn for backward
12507 if (processing_template_decl
12508 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12509 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12510 if (!dependent_type_p (basetype
)
12511 && !complete_type_or_else (basetype
, NULL
))
12512 /* An incomplete type. Remove it from the list. */
12513 *basep
= TREE_CHAIN (*basep
);
12517 if (TREE_TYPE (*basep
))
12519 if (CLASS_TYPE_P (basetype
))
12520 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12521 basep
= &TREE_CHAIN (*basep
);
12525 TYPE_MARKED_P (ref
) = 1;
12527 /* The binfo slot should be empty, unless this is an (ill-formed)
12529 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12531 error ("redefinition of %q#T", ref
);
12535 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12537 binfo
= make_tree_binfo (max_bases
);
12539 TYPE_BINFO (ref
) = binfo
;
12540 BINFO_OFFSET (binfo
) = size_zero_node
;
12541 BINFO_TYPE (binfo
) = ref
;
12543 /* Apply base-class info set up to the variants of this type. */
12544 fixup_type_variants (ref
);
12548 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12549 /* An aggregate cannot have baseclasses. */
12550 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12552 if (TREE_CODE (ref
) == UNION_TYPE
)
12554 error ("derived union %qT invalid", ref
);
12561 if (TYPE_FOR_JAVA (ref
))
12563 error ("Java class %qT cannot have multiple bases", ref
);
12570 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12572 if (TYPE_FOR_JAVA (ref
))
12574 error ("Java class %qT cannot have virtual bases", ref
);
12579 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12581 tree access
= TREE_PURPOSE (base_list
);
12582 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12583 tree basetype
= TREE_VALUE (base_list
);
12585 if (access
== access_default_node
)
12586 access
= default_access
;
12588 if (PACK_EXPANSION_P (basetype
))
12589 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12590 if (TREE_CODE (basetype
) == TYPE_DECL
)
12591 basetype
= TREE_TYPE (basetype
);
12592 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12594 error ("base type %qT fails to be a struct or class type",
12599 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12600 TYPE_FOR_JAVA (ref
) = 1;
12602 base_binfo
= NULL_TREE
;
12603 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12605 base_binfo
= TYPE_BINFO (basetype
);
12606 /* The original basetype could have been a typedef'd type. */
12607 basetype
= BINFO_TYPE (base_binfo
);
12609 /* Inherit flags from the base. */
12610 TYPE_HAS_NEW_OPERATOR (ref
)
12611 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12612 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12613 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12614 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12615 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12616 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12617 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12618 CLASSTYPE_REPEATED_BASE_P (ref
)
12619 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12622 /* We must do this test after we've seen through a typedef
12624 if (TYPE_MARKED_P (basetype
))
12626 if (basetype
== ref
)
12627 error ("recursive type %qT undefined", basetype
);
12629 error ("duplicate base type %qT invalid", basetype
);
12633 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12634 /* Regenerate the pack expansion for the bases. */
12635 basetype
= make_pack_expansion (basetype
);
12637 TYPE_MARKED_P (basetype
) = 1;
12639 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12640 &igo_prev
, via_virtual
);
12641 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12642 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12644 BINFO_BASE_APPEND (binfo
, base_binfo
);
12645 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12648 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12649 /* If we didn't get max_vbases vbases, we must have shared at
12650 least one of them, and are therefore diamond shaped. */
12651 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12653 /* Unmark all the types. */
12654 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12655 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12656 TYPE_MARKED_P (ref
) = 0;
12658 /* Now see if we have a repeated base type. */
12659 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12661 for (base_binfo
= binfo
; base_binfo
;
12662 base_binfo
= TREE_CHAIN (base_binfo
))
12664 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12666 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12669 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12671 for (base_binfo
= binfo
; base_binfo
;
12672 base_binfo
= TREE_CHAIN (base_binfo
))
12673 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12674 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12683 /* Copies the enum-related properties from type SRC to type DST.
12684 Used with the underlying type of an enum and the enum itself. */
12686 copy_type_enum (tree dst
, tree src
)
12689 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12691 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12692 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12693 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12694 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12695 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12696 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12697 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12698 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12699 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12703 /* Begin compiling the definition of an enumeration type.
12706 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12708 UNDERLYING_TYPE is the type that will be used as the storage for
12709 the enumeration type. This should be NULL_TREE if no storage type
12712 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12714 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12716 Returns the type object, as yet incomplete.
12717 Also records info about it so that build_enumerator
12718 may be used to declare the individual values as they are read. */
12721 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12722 bool scoped_enum_p
, bool *is_new
)
12724 tree prevtype
= NULL_TREE
;
12725 gcc_assert (identifier_p (name
));
12729 /* [C++0x dcl.enum]p5:
12731 If not explicitly specified, the underlying type of a scoped
12732 enumeration type is int. */
12733 if (!underlying_type
&& scoped_enum_p
)
12734 underlying_type
= integer_type_node
;
12736 if (underlying_type
)
12737 underlying_type
= cv_unqualified (underlying_type
);
12739 /* If this is the real definition for a previous forward reference,
12740 fill in the contents in the same object that used to be the
12741 forward reference. */
12743 enumtype
= lookup_and_check_tag (enum_type
, name
,
12744 /*tag_scope=*/ts_current
,
12745 /*template_header_p=*/false);
12747 /* In case of a template_decl, the only check that should be deferred
12748 to instantiation time is the comparison of underlying types. */
12749 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12751 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12753 error_at (input_location
, "scoped/unscoped mismatch "
12754 "in enum %q#T", enumtype
);
12755 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12756 "previous definition here");
12757 enumtype
= error_mark_node
;
12759 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12761 error_at (input_location
, "underlying type mismatch "
12762 "in enum %q#T", enumtype
);
12763 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12764 "previous definition here");
12765 enumtype
= error_mark_node
;
12767 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12768 && !dependent_type_p (underlying_type
)
12769 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12770 && !same_type_p (underlying_type
,
12771 ENUM_UNDERLYING_TYPE (enumtype
)))
12773 error_at (input_location
, "different underlying type "
12774 "in enum %q#T", enumtype
);
12775 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12776 "previous definition here");
12777 underlying_type
= NULL_TREE
;
12781 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12782 || processing_template_decl
)
12784 /* In case of error, make a dummy enum to allow parsing to
12786 if (enumtype
== error_mark_node
)
12788 name
= make_anon_name ();
12789 enumtype
= NULL_TREE
;
12792 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12793 of an opaque enum, or an opaque enum of an already defined
12794 enumeration (C++0x only).
12795 In any other case, it'll be NULL_TREE. */
12801 prevtype
= enumtype
;
12803 /* Do not push the decl more than once, unless we need to
12804 compare underlying types at instantiation time */
12806 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12807 || (underlying_type
12808 && dependent_type_p (underlying_type
))
12809 || (ENUM_UNDERLYING_TYPE (enumtype
)
12810 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12812 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12813 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12816 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12819 if (enumtype
== error_mark_node
)
12820 return error_mark_node
;
12822 /* The enum is considered opaque until the opening '{' of the
12823 enumerator list. */
12824 SET_OPAQUE_ENUM_P (enumtype
, true);
12825 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12828 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12830 if (underlying_type
)
12832 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12834 copy_type_enum (enumtype
, underlying_type
);
12835 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12837 else if (dependent_type_p (underlying_type
))
12838 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12840 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12841 underlying_type
, enumtype
);
12844 /* If into a template class, the returned enum is always the first
12845 declaration (opaque or not) seen. This way all the references to
12846 this type will be to the same declaration. The following ones are used
12847 only to check for definition errors. */
12848 if (prevtype
&& processing_template_decl
)
12854 /* After processing and defining all the values of an enumeration type,
12855 install their decls in the enumeration type.
12856 ENUMTYPE is the type object. */
12859 finish_enum_value_list (tree enumtype
)
12862 tree underlying_type
;
12865 tree minnode
, maxnode
;
12868 bool fixed_underlying_type_p
12869 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12871 /* We built up the VALUES in reverse order. */
12872 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12874 /* For an enum defined in a template, just set the type of the values;
12875 all further processing is postponed until the template is
12876 instantiated. We need to set the type so that tsubst of a CONST_DECL
12878 if (processing_template_decl
)
12880 for (values
= TYPE_VALUES (enumtype
);
12882 values
= TREE_CHAIN (values
))
12883 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12887 /* Determine the minimum and maximum values of the enumerators. */
12888 if (TYPE_VALUES (enumtype
))
12890 minnode
= maxnode
= NULL_TREE
;
12892 for (values
= TYPE_VALUES (enumtype
);
12894 values
= TREE_CHAIN (values
))
12896 decl
= TREE_VALUE (values
);
12898 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12899 each enumerator has the type of its enumeration. Prior to the
12900 closing brace, the type of each enumerator is the type of its
12901 initializing value. */
12902 TREE_TYPE (decl
) = enumtype
;
12904 /* Update the minimum and maximum values, if appropriate. */
12905 value
= DECL_INITIAL (decl
);
12906 if (value
== error_mark_node
)
12907 value
= integer_zero_node
;
12908 /* Figure out what the minimum and maximum values of the
12909 enumerators are. */
12911 minnode
= maxnode
= value
;
12912 else if (tree_int_cst_lt (maxnode
, value
))
12914 else if (tree_int_cst_lt (value
, minnode
))
12921 If the enumerator-list is empty, the underlying type is as if
12922 the enumeration had a single enumerator with value 0. */
12923 minnode
= maxnode
= integer_zero_node
;
12925 if (!fixed_underlying_type_p
)
12927 /* Compute the number of bits require to represent all values of the
12928 enumeration. We must do this before the type of MINNODE and
12929 MAXNODE are transformed, since tree_int_cst_min_precision relies
12930 on the TREE_TYPE of the value it is passed. */
12931 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12932 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12933 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12934 int precision
= MAX (lowprec
, highprec
);
12936 bool use_short_enum
;
12938 /* Determine the underlying type of the enumeration.
12942 The underlying type of an enumeration is an integral type that
12943 can represent all the enumerator values defined in the
12944 enumeration. It is implementation-defined which integral type is
12945 used as the underlying type for an enumeration except that the
12946 underlying type shall not be larger than int unless the value of
12947 an enumerator cannot fit in an int or unsigned int.
12949 We use "int" or an "unsigned int" as the underlying type, even if
12950 a smaller integral type would work, unless the user has
12951 explicitly requested that we use the smallest possible type. The
12952 user can request that for all enumerations with a command line
12953 flag, or for just one enumeration with an attribute. */
12955 use_short_enum
= flag_short_enums
12956 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12958 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12962 underlying_type
= integer_types
[itk
];
12963 if (underlying_type
!= NULL_TREE
12964 && TYPE_PRECISION (underlying_type
) >= precision
12965 && TYPE_SIGN (underlying_type
) == sgn
)
12968 if (itk
== itk_none
)
12972 IF no integral type can represent all the enumerator values, the
12973 enumeration is ill-formed. */
12974 error ("no integral type can represent all of the enumerator values "
12975 "for %qT", enumtype
);
12976 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12977 underlying_type
= integer_types
[itk_unsigned_long_long
];
12982 The value of sizeof() applied to an enumeration type, an object
12983 of an enumeration type, or an enumerator, is the value of sizeof()
12984 applied to the underlying type. */
12985 copy_type_enum (enumtype
, underlying_type
);
12987 /* Compute the minimum and maximum values for the type.
12991 For an enumeration where emin is the smallest enumerator and emax
12992 is the largest, the values of the enumeration are the values of the
12993 underlying type in the range bmin to bmax, where bmin and bmax are,
12994 respectively, the smallest and largest values of the smallest bit-
12995 field that can store emin and emax. */
12997 /* The middle-end currently assumes that types with TYPE_PRECISION
12998 narrower than their underlying type are suitably zero or sign
12999 extended to fill their mode. Similarly, it assumes that the front
13000 end assures that a value of a particular type must be within
13001 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
13003 We used to set these fields based on bmin and bmax, but that led
13004 to invalid assumptions like optimizing away bounds checking. So
13005 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
13006 TYPE_MAX_VALUE to the values for the mode above and only restrict
13007 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
13008 ENUM_UNDERLYING_TYPE (enumtype
)
13009 = build_distinct_type_copy (underlying_type
);
13010 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
13011 set_min_and_max_values_for_integral_type
13012 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
13014 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
13015 if (flag_strict_enums
)
13016 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
13019 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13021 /* Convert each of the enumerators to the type of the underlying
13022 type of the enumeration. */
13023 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13025 location_t saved_location
;
13027 decl
= TREE_VALUE (values
);
13028 saved_location
= input_location
;
13029 input_location
= DECL_SOURCE_LOCATION (decl
);
13030 if (fixed_underlying_type_p
)
13031 /* If the enumeration type has a fixed underlying type, we
13032 already checked all of the enumerator values. */
13033 value
= DECL_INITIAL (decl
);
13035 value
= perform_implicit_conversion (underlying_type
,
13036 DECL_INITIAL (decl
),
13037 tf_warning_or_error
);
13038 input_location
= saved_location
;
13040 /* Do not clobber shared ints. */
13041 value
= copy_node (value
);
13043 TREE_TYPE (value
) = enumtype
;
13044 DECL_INITIAL (decl
) = value
;
13047 /* Fix up all variant types of this enum type. */
13048 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13049 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13051 if (at_class_scope_p ()
13052 && COMPLETE_TYPE_P (current_class_type
)
13053 && UNSCOPED_ENUM_P (enumtype
))
13054 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13055 current_class_type
);
13057 /* Finish debugging output for this type. */
13058 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13061 /* Finishes the enum type. This is called only the first time an
13062 enumeration is seen, be it opaque or odinary.
13063 ENUMTYPE is the type object. */
13066 finish_enum (tree enumtype
)
13068 if (processing_template_decl
)
13070 if (at_function_scope_p ())
13071 add_stmt (build_min (TAG_DEFN
, enumtype
));
13075 /* If this is a forward declaration, there should not be any variants,
13076 though we can get a variant in the middle of an enum-specifier with
13077 wacky code like 'enum E { e = sizeof(const E*) };' */
13078 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13079 && (TYPE_VALUES (enumtype
)
13080 || !TYPE_NEXT_VARIANT (enumtype
)));
13083 /* Build and install a CONST_DECL for an enumeration constant of the
13084 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13085 LOC is the location of NAME.
13086 Assignment of sequential values by default is handled here. */
13089 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
13095 /* scalar_constant_value will pull out this expression, so make sure
13096 it's folded as appropriate. */
13097 if (processing_template_decl
)
13098 value
= fold_non_dependent_expr (value
);
13100 /* If the VALUE was erroneous, pretend it wasn't there; that will
13101 result in the enum being assigned the next value in sequence. */
13102 if (value
== error_mark_node
)
13105 /* Remove no-op casts from the value. */
13107 STRIP_TYPE_NOPS (value
);
13109 if (! processing_template_decl
)
13111 /* Validate and default VALUE. */
13112 if (value
!= NULL_TREE
)
13114 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13116 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13121 else if (! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13122 value
= perform_implicit_conversion_flags
13123 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13124 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13126 if (value
== error_mark_node
)
13129 if (value
!= NULL_TREE
)
13131 value
= cxx_constant_value (value
);
13133 if (TREE_CODE (value
) != INTEGER_CST
13134 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13136 error ("enumerator value for %qD is not an integer constant",
13143 /* Default based on previous value. */
13144 if (value
== NULL_TREE
)
13146 if (TYPE_VALUES (enumtype
))
13151 /* C++03 7.2/4: If no initializer is specified for the first
13152 enumerator, the type is an unspecified integral
13153 type. Otherwise the type is the same as the type of the
13154 initializing value of the preceding enumerator unless the
13155 incremented value is not representable in that type, in
13156 which case the type is an unspecified integral type
13157 sufficient to contain the incremented value. */
13158 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13159 if (error_operand_p (prev_value
))
13160 value
= error_mark_node
;
13163 tree type
= TREE_TYPE (prev_value
);
13164 signop sgn
= TYPE_SIGN (type
);
13165 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13169 bool pos
= !wi::neg_p (wi
, sgn
);
13170 if (!wi::fits_to_tree_p (wi
, type
))
13173 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13175 type
= integer_types
[itk
];
13176 if (type
!= NULL_TREE
13177 && (pos
|| !TYPE_UNSIGNED (type
))
13178 && wi::fits_to_tree_p (wi
, type
))
13181 if (type
&& cxx_dialect
< cxx11
13182 && itk
> itk_unsigned_long
)
13183 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13184 incremented enumerator value is too large for %<unsigned long%>" : "\
13185 incremented enumerator value is too large for %<long%>");
13187 if (type
== NULL_TREE
)
13190 value
= wide_int_to_tree (type
, wi
);
13195 error ("overflow in enumeration values at %qD", name
);
13196 value
= error_mark_node
;
13201 value
= integer_zero_node
;
13204 /* Remove no-op casts from the value. */
13205 STRIP_TYPE_NOPS (value
);
13207 /* If the underlying type of the enum is fixed, check whether
13208 the enumerator values fits in the underlying type. If it
13209 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13210 if (ENUM_UNDERLYING_TYPE (enumtype
)
13212 && TREE_CODE (value
) == INTEGER_CST
)
13214 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13215 error ("enumerator value %E is outside the range of underlying "
13216 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13218 /* Convert the value to the appropriate type. */
13219 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13223 /* C++ associates enums with global, function, or class declarations. */
13224 context
= current_scope ();
13226 /* Build the actual enumeration constant. Note that the enumeration
13227 constants have the underlying type of the enum (if it is fixed)
13228 or the type of their initializer (if the underlying type of the
13229 enum is not fixed):
13233 If the underlying type is fixed, the type of each enumerator
13234 prior to the closing brace is the underlying type; if the
13235 initializing value of an enumerator cannot be represented by
13236 the underlying type, the program is ill-formed. If the
13237 underlying type is not fixed, the type of each enumerator is
13238 the type of its initializing value.
13240 If the underlying type is not fixed, it will be computed by
13241 finish_enum and we will reset the type of this enumerator. Of
13242 course, if we're processing a template, there may be no value. */
13243 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13245 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13247 DECL_CONTEXT (decl
) = enumtype
;
13248 TREE_CONSTANT (decl
) = 1;
13249 TREE_READONLY (decl
) = 1;
13250 DECL_INITIAL (decl
) = value
;
13252 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13253 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13254 on the TYPE_FIELDS list for `S'. (That's so that you can say
13255 things like `S::i' later.) */
13256 finish_member_declaration (decl
);
13260 /* Add this enumeration constant to the list for this type. */
13261 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13264 /* Look for an enumerator with the given NAME within the enumeration
13265 type ENUMTYPE. This routine is used primarily for qualified name
13266 lookup into an enumerator in C++0x, e.g.,
13268 enum class Color { Red, Green, Blue };
13270 Color color = Color::Red;
13272 Returns the value corresponding to the enumerator, or
13273 NULL_TREE if no such enumerator was found. */
13275 lookup_enumerator (tree enumtype
, tree name
)
13278 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13280 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13281 return e
? TREE_VALUE (e
) : NULL_TREE
;
13285 /* We're defining DECL. Make sure that its type is OK. */
13288 check_function_type (tree decl
, tree current_function_parms
)
13290 tree fntype
= TREE_TYPE (decl
);
13291 tree return_type
= complete_type (TREE_TYPE (fntype
));
13293 /* In a function definition, arg types must be complete. */
13294 require_complete_types_for_parms (current_function_parms
);
13296 if (dependent_type_p (return_type
)
13297 || type_uses_auto (return_type
))
13299 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13300 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13302 tree args
= TYPE_ARG_TYPES (fntype
);
13304 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13305 error ("return type %q#T is incomplete", return_type
);
13307 error ("return type has Java class type %q#T", return_type
);
13309 /* Make it return void instead. */
13310 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13311 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13313 TREE_CHAIN (args
));
13315 fntype
= build_function_type (void_type_node
, args
);
13317 = build_exception_variant (fntype
,
13318 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13319 fntype
= (cp_build_type_attribute_variant
13320 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13321 TREE_TYPE (decl
) = fntype
;
13324 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13327 /* Create the FUNCTION_DECL for a function definition.
13328 DECLSPECS and DECLARATOR are the parts of the declaration;
13329 they describe the function's name and the type it returns,
13330 but twisted together in a fashion that parallels the syntax of C.
13332 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13333 DECLARATOR is really the DECL for the function we are about to
13334 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13335 indicating that the function is an inline defined in-class.
13337 This function creates a binding context for the function body
13338 as well as setting up the FUNCTION_DECL in current_function_decl.
13340 For C++, we must first check whether that datum makes any sense.
13341 For example, "class A local_a(1,2);" means that variable local_a
13342 is an aggregate of type A, which should have a constructor
13343 applied to it with the argument list [1, 2].
13345 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13346 or may be a BLOCK if the function has been defined previously
13347 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13348 error_mark_node if the function has never been defined, or
13349 a BLOCK if the function has been defined somewhere. */
13352 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13354 tree ctype
= NULL_TREE
;
13357 int doing_friend
= 0;
13358 cp_binding_level
*bl
;
13359 tree current_function_parms
;
13360 struct c_fileinfo
*finfo
13361 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13362 bool honor_interface
;
13364 /* Sanity check. */
13365 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13366 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13368 fntype
= TREE_TYPE (decl1
);
13369 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13370 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13372 /* ISO C++ 11.4/5. A friend function defined in a class is in
13373 the (lexical) scope of the class in which it is defined. */
13374 if (!ctype
&& DECL_FRIEND_P (decl1
))
13376 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13378 /* CTYPE could be null here if we're dealing with a template;
13379 for example, `inline friend float foo()' inside a template
13380 will have no CTYPE set. */
13381 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13387 if (DECL_DECLARED_INLINE_P (decl1
)
13388 && lookup_attribute ("noinline", attrs
))
13389 warning (0, "inline function %q+D given attribute noinline", decl1
);
13391 /* Handle gnu_inline attribute. */
13392 if (GNU_INLINE_P (decl1
))
13394 DECL_EXTERNAL (decl1
) = 1;
13395 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13396 DECL_INTERFACE_KNOWN (decl1
) = 1;
13397 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13400 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13401 /* This is a constructor, we must ensure that any default args
13402 introduced by this definition are propagated to the clones
13403 now. The clones are used directly in overload resolution. */
13404 adjust_clone_args (decl1
);
13406 /* Sometimes we don't notice that a function is a static member, and
13407 build a METHOD_TYPE for it. Fix that up now. */
13408 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13409 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13411 /* Set up current_class_type, and enter the scope of the class, if
13414 push_nested_class (ctype
);
13415 else if (DECL_STATIC_FUNCTION_P (decl1
))
13416 push_nested_class (DECL_CONTEXT (decl1
));
13418 /* Now that we have entered the scope of the class, we must restore
13419 the bindings for any template parameters surrounding DECL1, if it
13420 is an inline member template. (Order is important; consider the
13421 case where a template parameter has the same name as a field of
13422 the class.) It is not until after this point that
13423 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13424 if (flags
& SF_INCLASS_INLINE
)
13425 maybe_begin_member_template_processing (decl1
);
13427 /* Effective C++ rule 15. */
13429 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13430 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13431 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13433 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13434 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13435 if (!DECL_INITIAL (decl1
))
13436 DECL_INITIAL (decl1
) = error_mark_node
;
13438 /* This function exists in static storage.
13439 (This does not mean `static' in the C sense!) */
13440 TREE_STATIC (decl1
) = 1;
13442 /* We must call push_template_decl after current_class_type is set
13443 up. (If we are processing inline definitions after exiting a
13444 class scope, current_class_type will be NULL_TREE until set above
13445 by push_nested_class.) */
13446 if (processing_template_decl
)
13448 tree newdecl1
= push_template_decl (decl1
);
13449 if (newdecl1
== error_mark_node
)
13451 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13452 pop_nested_class ();
13458 /* We are now in the scope of the function being defined. */
13459 current_function_decl
= decl1
;
13461 /* Save the parm names or decls from this function's declarator
13462 where store_parm_decls will find them. */
13463 current_function_parms
= DECL_ARGUMENTS (decl1
);
13465 /* Make sure the parameter and return types are reasonable. When
13466 you declare a function, these types can be incomplete, but they
13467 must be complete when you define the function. */
13468 check_function_type (decl1
, current_function_parms
);
13470 /* Build the return declaration for the function. */
13471 restype
= TREE_TYPE (fntype
);
13473 if (DECL_RESULT (decl1
) == NULL_TREE
)
13477 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13478 DECL_ARTIFICIAL (resdecl
) = 1;
13479 DECL_IGNORED_P (resdecl
) = 1;
13480 DECL_RESULT (decl1
) = resdecl
;
13482 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13485 /* Let the user know we're compiling this function. */
13486 announce_function (decl1
);
13488 /* Record the decl so that the function name is defined.
13489 If we already have a decl for this name, and it is a FUNCTION_DECL,
13490 use the old decl. */
13491 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13493 /* A specialization is not used to guide overload resolution. */
13494 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13495 && !(DECL_USE_TEMPLATE (decl1
) &&
13496 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13498 tree olddecl
= pushdecl (decl1
);
13500 if (olddecl
== error_mark_node
)
13501 /* If something went wrong when registering the declaration,
13502 use DECL1; we have to have a FUNCTION_DECL to use when
13503 parsing the body of the function. */
13507 /* Otherwise, OLDDECL is either a previous declaration
13508 of the same function or DECL1 itself. */
13510 if (warn_missing_declarations
13511 && olddecl
== decl1
13512 && !DECL_MAIN_P (decl1
)
13513 && TREE_PUBLIC (decl1
)
13514 && !DECL_DECLARED_INLINE_P (decl1
))
13518 /* Check whether DECL1 is in an anonymous
13520 for (context
= DECL_CONTEXT (decl1
);
13522 context
= DECL_CONTEXT (context
))
13524 if (TREE_CODE (context
) == NAMESPACE_DECL
13525 && DECL_NAME (context
) == NULL_TREE
)
13529 if (context
== NULL
)
13530 warning (OPT_Wmissing_declarations
,
13531 "no previous declaration for %q+D", decl1
);
13539 /* We need to set the DECL_CONTEXT. */
13540 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13541 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13543 fntype
= TREE_TYPE (decl1
);
13544 restype
= TREE_TYPE (fntype
);
13546 /* If #pragma weak applies, mark the decl appropriately now.
13547 The pragma only applies to global functions. Because
13548 determining whether or not the #pragma applies involves
13549 computing the mangled name for the declaration, we cannot
13550 apply the pragma until after we have merged this declaration
13551 with any previous declarations; if the original declaration
13552 has a linkage specification, that specification applies to
13553 the definition as well, and may affect the mangled name. */
13554 if (DECL_FILE_SCOPE_P (decl1
))
13555 maybe_apply_pragma_weak (decl1
);
13558 /* Reset this in case the call to pushdecl changed it. */
13559 current_function_decl
= decl1
;
13561 gcc_assert (DECL_INITIAL (decl1
));
13563 /* This function may already have been parsed, in which case just
13564 return; our caller will skip over the body without parsing. */
13565 if (DECL_INITIAL (decl1
) != error_mark_node
)
13568 /* Initialize RTL machinery. We cannot do this until
13569 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13570 even when processing a template; this is how we get
13571 CFUN set up, and our per-function variables initialized.
13572 FIXME factor out the non-RTL stuff. */
13573 bl
= current_binding_level
;
13574 allocate_struct_function (decl1
, processing_template_decl
);
13576 /* Initialize the language data structures. Whenever we start
13577 a new function, we destroy temporaries in the usual way. */
13578 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13579 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13580 current_binding_level
= bl
;
13582 if (!processing_template_decl
&& type_uses_auto (restype
))
13584 FNDECL_USED_AUTO (decl1
) = true;
13585 current_function_auto_return_pattern
= restype
;
13588 /* Start the statement-tree, start the tree now. */
13589 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13591 /* If we are (erroneously) defining a function that we have already
13592 defined before, wipe out what we knew before. */
13593 if (!DECL_PENDING_INLINE_P (decl1
))
13594 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13596 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13598 /* We know that this was set up by `grokclassfn'. We do not
13599 wait until `store_parm_decls', since evil parse errors may
13600 never get us to that point. Here we keep the consistency
13601 between `current_class_type' and `current_class_ptr'. */
13602 tree t
= DECL_ARGUMENTS (decl1
);
13604 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13605 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13607 cp_function_chain
->x_current_class_ref
13608 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13609 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13610 cp_function_chain
->x_current_class_ptr
= t
;
13612 /* Constructors and destructors need to know whether they're "in
13613 charge" of initializing virtual base classes. */
13614 t
= DECL_CHAIN (t
);
13615 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13617 current_in_charge_parm
= t
;
13618 t
= DECL_CHAIN (t
);
13620 if (DECL_HAS_VTT_PARM_P (decl1
))
13622 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13623 current_vtt_parm
= t
;
13627 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13628 /* Implicitly-defined methods (like the
13629 destructor for a class in which no destructor
13630 is explicitly declared) must not be defined
13631 until their definition is needed. So, we
13632 ignore interface specifications for
13633 compiler-generated functions. */
13634 && !DECL_ARTIFICIAL (decl1
));
13636 if (processing_template_decl
)
13637 /* Don't mess with interface flags. */;
13638 else if (DECL_INTERFACE_KNOWN (decl1
))
13640 tree ctx
= decl_function_context (decl1
);
13642 if (DECL_NOT_REALLY_EXTERN (decl1
))
13643 DECL_EXTERNAL (decl1
) = 0;
13645 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13646 /* This is a function in a local class in an extern inline
13647 or template function. */
13648 comdat_linkage (decl1
);
13650 /* If this function belongs to an interface, it is public.
13651 If it belongs to someone else's interface, it is also external.
13652 This only affects inlines and template instantiations. */
13653 else if (!finfo
->interface_unknown
&& honor_interface
)
13655 if (DECL_DECLARED_INLINE_P (decl1
)
13656 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13658 DECL_EXTERNAL (decl1
)
13659 = (finfo
->interface_only
13660 || (DECL_DECLARED_INLINE_P (decl1
)
13661 && ! flag_implement_inlines
13662 && !DECL_VINDEX (decl1
)));
13664 /* For WIN32 we also want to put these in linkonce sections. */
13665 maybe_make_one_only (decl1
);
13668 DECL_EXTERNAL (decl1
) = 0;
13669 DECL_INTERFACE_KNOWN (decl1
) = 1;
13670 /* If this function is in an interface implemented in this file,
13671 make sure that the back end knows to emit this function
13673 if (!DECL_EXTERNAL (decl1
))
13674 mark_needed (decl1
);
13676 else if (finfo
->interface_unknown
&& finfo
->interface_only
13677 && honor_interface
)
13679 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13680 interface, we will have both finfo->interface_unknown and
13681 finfo->interface_only set. In that case, we don't want to
13682 use the normal heuristics because someone will supply a
13683 #pragma implementation elsewhere, and deducing it here would
13684 produce a conflict. */
13685 comdat_linkage (decl1
);
13686 DECL_EXTERNAL (decl1
) = 0;
13687 DECL_INTERFACE_KNOWN (decl1
) = 1;
13688 DECL_DEFER_OUTPUT (decl1
) = 1;
13692 /* This is a definition, not a reference.
13693 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13694 if (!GNU_INLINE_P (decl1
))
13695 DECL_EXTERNAL (decl1
) = 0;
13697 if ((DECL_DECLARED_INLINE_P (decl1
)
13698 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13699 && ! DECL_INTERFACE_KNOWN (decl1
))
13700 DECL_DEFER_OUTPUT (decl1
) = 1;
13702 DECL_INTERFACE_KNOWN (decl1
) = 1;
13705 /* Determine the ELF visibility attribute for the function. We must not
13706 do this before calling "pushdecl", as we must allow "duplicate_decls"
13707 to merge any attributes appropriately. We also need to wait until
13709 if (!DECL_CLONED_FUNCTION_P (decl1
))
13710 determine_visibility (decl1
);
13712 if (!processing_template_decl
)
13713 maybe_instantiate_noexcept (decl1
);
13715 begin_scope (sk_function_parms
, decl1
);
13719 if (DECL_DESTRUCTOR_P (decl1
)
13720 || (DECL_CONSTRUCTOR_P (decl1
)
13721 && targetm
.cxx
.cdtor_returns_this ()))
13723 cdtor_label
= build_decl (input_location
,
13724 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13725 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13728 start_fname_decls ();
13730 store_parm_decls (current_function_parms
);
13736 /* Like start_preparsed_function, except that instead of a
13737 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13739 Returns true on success. If the DECLARATOR is not suitable
13740 for a function, we return false, which tells the parser to
13741 skip the entire function. */
13744 start_function (cp_decl_specifier_seq
*declspecs
,
13745 const cp_declarator
*declarator
,
13750 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13751 if (decl1
== error_mark_node
)
13753 /* If the declarator is not suitable for a function definition,
13754 cause a syntax error. */
13755 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13757 error ("invalid function declaration");
13761 if (DECL_MAIN_P (decl1
))
13762 /* main must return int. grokfndecl should have corrected it
13763 (and issued a diagnostic) if the user got it wrong. */
13764 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13765 integer_type_node
));
13767 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13770 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13774 use_eh_spec_block (tree fn
)
13776 return (flag_exceptions
&& flag_enforce_eh_specs
13777 && !processing_template_decl
13778 && !type_throw_all_p (TREE_TYPE (fn
))
13779 /* We insert the EH_SPEC_BLOCK only in the original
13780 function; then, it is copied automatically to the
13782 && !DECL_CLONED_FUNCTION_P (fn
)
13783 /* Implicitly-generated constructors and destructors have
13784 exception specifications. However, those specifications
13785 are the union of the possible exceptions specified by the
13786 constructors/destructors for bases and members, so no
13787 unallowed exception will ever reach this function. By
13788 not creating the EH_SPEC_BLOCK we save a little memory,
13789 and we avoid spurious warnings about unreachable
13791 && !DECL_DEFAULTED_FN (fn
));
13794 /* Store the parameter declarations into the current function declaration.
13795 This is called after parsing the parameter declarations, before
13796 digesting the body of the function.
13798 Also install to binding contour return value identifier, if any. */
13801 store_parm_decls (tree current_function_parms
)
13803 tree fndecl
= current_function_decl
;
13806 /* This is a chain of any other decls that came in among the parm
13807 declarations. If a parm is declared with enum {foo, bar} x;
13808 then CONST_DECLs for foo and bar are put here. */
13809 tree nonparms
= NULL_TREE
;
13811 if (current_function_parms
)
13813 /* This case is when the function was defined with an ANSI prototype.
13814 The parms already have decls, so we need not do anything here
13815 except record them as in effect
13816 and complain if any redundant old-style parm decls were written. */
13818 tree specparms
= current_function_parms
;
13821 /* Must clear this because it might contain TYPE_DECLs declared
13823 current_binding_level
->names
= NULL
;
13825 /* If we're doing semantic analysis, then we'll call pushdecl
13826 for each of these. We must do them in reverse order so that
13827 they end in the correct forward order. */
13828 specparms
= nreverse (specparms
);
13830 for (parm
= specparms
; parm
; parm
= next
)
13832 next
= DECL_CHAIN (parm
);
13833 if (TREE_CODE (parm
) == PARM_DECL
)
13835 if (DECL_NAME (parm
) == NULL_TREE
13836 || !VOID_TYPE_P (parm
))
13839 error ("parameter %qD declared void", parm
);
13843 /* If we find an enum constant or a type tag,
13844 put it aside for the moment. */
13845 TREE_CHAIN (parm
) = NULL_TREE
;
13846 nonparms
= chainon (nonparms
, parm
);
13850 /* Get the decls in their original chain order and record in the
13851 function. This is all and only the PARM_DECLs that were
13852 pushed into scope by the loop above. */
13853 DECL_ARGUMENTS (fndecl
) = getdecls ();
13856 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13858 /* Now store the final chain of decls for the arguments
13859 as the decl-chain of the current lexical scope.
13860 Put the enumerators in as well, at the front so that
13861 DECL_ARGUMENTS is not modified. */
13862 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13864 if (use_eh_spec_block (current_function_decl
))
13865 current_eh_spec_block
= begin_eh_spec_block ();
13869 /* We have finished doing semantic analysis on DECL, but have not yet
13870 generated RTL for its body. Save away our current state, so that
13871 when we want to generate RTL later we know what to do. */
13874 save_function_data (tree decl
)
13876 struct language_function
*f
;
13878 /* Save the language-specific per-function data so that we can
13879 get it back when we really expand this function. */
13880 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13883 f
= ggc_alloc
<language_function
> ();
13884 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13885 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13887 /* Clear out the bits we don't need. */
13888 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13889 f
->bindings
= NULL
;
13890 f
->x_local_names
= NULL
;
13891 f
->base
.local_typedefs
= NULL
;
13895 /* Set the return value of the constructor (if present). */
13898 finish_constructor_body (void)
13903 if (targetm
.cxx
.cdtor_returns_this ()
13904 && (! TYPE_FOR_JAVA (current_class_type
)))
13906 /* Any return from a constructor will end up here. */
13907 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13909 val
= DECL_ARGUMENTS (current_function_decl
);
13910 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13911 DECL_RESULT (current_function_decl
), val
);
13912 /* Return the address of the object. */
13913 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13914 add_stmt (exprstmt
);
13918 /* Do all the processing for the beginning of a destructor; set up the
13919 vtable pointers and cleanups for bases and members. */
13922 begin_destructor_body (void)
13924 tree compound_stmt
;
13926 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13927 issued an error message. We still want to try to process the
13928 body of the function, but initialize_vtbl_ptrs will crash if
13929 TYPE_BINFO is NULL. */
13930 if (COMPLETE_TYPE_P (current_class_type
))
13932 compound_stmt
= begin_compound_stmt (0);
13933 /* Make all virtual function table pointers in non-virtual base
13934 classes point to CURRENT_CLASS_TYPE's virtual function
13936 initialize_vtbl_ptrs (current_class_ptr
);
13937 finish_compound_stmt (compound_stmt
);
13939 /* Insert a cleanup to let the back end know that the object is dead
13940 when we exit the destructor, either normally or via exception. */
13941 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13942 tree clobber
= build_constructor (btype
, NULL
);
13943 TREE_THIS_VOLATILE (clobber
) = true;
13944 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13945 bref
= convert_from_reference (bref
);
13946 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13947 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13949 /* And insert cleanups for our bases and members so that they
13950 will be properly destroyed if we throw. */
13951 push_base_cleanups ();
13955 /* At the end of every destructor we generate code to delete the object if
13956 necessary. Do that now. */
13959 finish_destructor_body (void)
13963 /* Any return from a destructor will end up here; that way all base
13964 and member cleanups will be run when the function returns. */
13965 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13967 /* In a virtual destructor, we must call delete. */
13968 if (DECL_VIRTUAL_P (current_function_decl
))
13971 tree virtual_size
= cxx_sizeof (current_class_type
);
13975 At the point of definition of a virtual destructor (including
13976 an implicit definition), non-placement operator delete shall
13977 be looked up in the scope of the destructor's class and if
13978 found shall be accessible and unambiguous. */
13979 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13981 /*global_p=*/false,
13982 /*placement=*/NULL_TREE
,
13983 /*alloc_fn=*/NULL_TREE
,
13984 tf_warning_or_error
);
13986 if_stmt
= begin_if_stmt ();
13987 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13988 current_in_charge_parm
,
13991 finish_expr_stmt (exprstmt
);
13992 finish_then_clause (if_stmt
);
13993 finish_if_stmt (if_stmt
);
13996 if (targetm
.cxx
.cdtor_returns_this ())
14000 val
= DECL_ARGUMENTS (current_function_decl
);
14001 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14002 DECL_RESULT (current_function_decl
), val
);
14003 /* Return the address of the object. */
14004 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14005 add_stmt (exprstmt
);
14009 /* Do the necessary processing for the beginning of a function body, which
14010 in this case includes member-initializers, but not the catch clauses of
14011 a function-try-block. Currently, this means opening a binding level
14012 for the member-initializers (in a ctor), member cleanups (in a dtor),
14013 and capture proxies (in a lambda operator()). */
14016 begin_function_body (void)
14020 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14023 if (processing_template_decl
)
14024 /* Do nothing now. */;
14026 /* Always keep the BLOCK node associated with the outermost pair of
14027 curly braces of a function. These are needed for correct
14028 operation of dwarfout.c. */
14029 keep_next_level (true);
14031 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14033 if (processing_template_decl
)
14034 /* Do nothing now. */;
14035 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14036 begin_destructor_body ();
14041 /* Do the processing for the end of a function body. Currently, this means
14042 closing out the cleanups for fully-constructed bases and members, and in
14043 the case of the destructor, deleting the object if desired. Again, this
14044 is only meaningful for [cd]tors, since they are the only functions where
14045 there is a significant distinction between the main body and any
14046 function catch clauses. Handling, say, main() return semantics here
14047 would be wrong, as flowing off the end of a function catch clause for
14048 main() would also need to return 0. */
14051 finish_function_body (tree compstmt
)
14053 if (compstmt
== NULL_TREE
)
14056 /* Close the block. */
14057 finish_compound_stmt (compstmt
);
14059 if (processing_template_decl
)
14060 /* Do nothing now. */;
14061 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14062 finish_constructor_body ();
14063 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14064 finish_destructor_body ();
14067 /* Given a function, returns the BLOCK corresponding to the outermost level
14068 of curly braces, skipping the artificial block created for constructor
14072 outer_curly_brace_block (tree fndecl
)
14074 tree block
= DECL_INITIAL (fndecl
);
14075 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14077 block
= BLOCK_SUBBLOCKS (block
);
14078 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14080 block
= BLOCK_SUBBLOCKS (block
);
14081 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14085 /* If FNDECL is a class's key method, add the class to the list of
14086 keyed classes that should be emitted. */
14089 record_key_method_defined (tree fndecl
)
14091 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14092 && DECL_VIRTUAL_P (fndecl
)
14093 && !processing_template_decl
)
14095 tree fnclass
= DECL_CONTEXT (fndecl
);
14096 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14097 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14101 /* Subroutine of finish_function.
14102 Save the body of constexpr functions for possible
14103 future compile time evaluation. */
14106 maybe_save_function_definition (tree fun
)
14108 if (!processing_template_decl
14109 && DECL_DECLARED_CONSTEXPR_P (fun
)
14110 && !cp_function_chain
->invalid_constexpr
14111 && !DECL_CLONED_FUNCTION_P (fun
))
14112 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14115 /* Finish up a function declaration and compile that function
14116 all the way to assembler language output. The free the storage
14117 for the function definition.
14119 FLAGS is a bitwise or of the following values:
14121 We just finished processing the body of an in-class inline
14122 function definition. (This processing will have taken place
14123 after the class definition is complete.) */
14126 finish_function (int flags
)
14128 tree fndecl
= current_function_decl
;
14129 tree fntype
, ctype
= NULL_TREE
;
14130 int inclass_inline
= (flags
& 2) != 0;
14132 /* When we get some parse errors, we can end up without a
14133 current_function_decl, so cope. */
14134 if (fndecl
== NULL_TREE
)
14135 return error_mark_node
;
14137 if (c_dialect_objc ())
14138 objc_finish_function ();
14140 gcc_assert (!defer_mark_used_calls
);
14141 defer_mark_used_calls
= true;
14143 record_key_method_defined (fndecl
);
14145 fntype
= TREE_TYPE (fndecl
);
14147 /* TREE_READONLY (fndecl) = 1;
14148 This caused &foo to be of type ptr-to-const-function
14149 which then got a warning when stored in a ptr-to-function variable. */
14151 gcc_assert (building_stmt_list_p ());
14152 /* The current function is being defined, so its DECL_INITIAL should
14153 be set, and unless there's a multiple definition, it should be
14154 error_mark_node. */
14155 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14157 /* For a cloned function, we've already got all the code we need;
14158 there's no need to add any extra bits. */
14159 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14161 /* Make it so that `main' always returns 0 by default. */
14162 if (DECL_MAIN_P (current_function_decl
))
14163 finish_return_stmt (integer_zero_node
);
14165 if (use_eh_spec_block (current_function_decl
))
14166 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14167 (TREE_TYPE (current_function_decl
)),
14168 current_eh_spec_block
);
14171 /* If we're saving up tree structure, tie off the function now. */
14172 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14174 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14175 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14177 finish_fname_decls ();
14179 /* If this function can't throw any exceptions, remember that. */
14180 if (!processing_template_decl
14181 && !cp_function_chain
->can_throw
14182 && !flag_non_call_exceptions
14183 && !decl_replaceable_p (fndecl
))
14184 TREE_NOTHROW (fndecl
) = 1;
14186 /* This must come after expand_function_end because cleanups might
14187 have declarations (from inline functions) that need to go into
14188 this function's blocks. */
14190 /* If the current binding level isn't the outermost binding level
14191 for this function, either there is a bug, or we have experienced
14192 syntax errors and the statement tree is malformed. */
14193 if (current_binding_level
->kind
!= sk_function_parms
)
14195 /* Make sure we have already experienced errors. */
14196 gcc_assert (errorcount
);
14198 /* Throw away the broken statement tree and extra binding
14200 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14202 while (current_binding_level
->kind
!= sk_function_parms
)
14204 if (current_binding_level
->kind
== sk_class
)
14205 pop_nested_class ();
14207 poplevel (0, 0, 0);
14210 poplevel (1, 0, 1);
14212 /* Statements should always be full-expressions at the outermost set
14213 of curly braces for a function. */
14214 gcc_assert (stmts_are_full_exprs_p ());
14216 /* If there are no return statements in a function with auto return type,
14217 the return type is void. But if the declared type is something like
14218 auto*, this is an error. */
14219 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14220 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14222 if (!is_auto (current_function_auto_return_pattern
)
14223 && !current_function_returns_value
&& !current_function_returns_null
)
14225 error ("no return statements in function returning %qT",
14226 current_function_auto_return_pattern
);
14227 inform (input_location
, "only plain %<auto%> return type can be "
14228 "deduced to %<void%>");
14230 apply_deduced_return_type (fndecl
, void_type_node
);
14231 fntype
= TREE_TYPE (fndecl
);
14234 /* Save constexpr function body before it gets munged by
14235 the NRV transformation. */
14236 maybe_save_function_definition (fndecl
);
14238 /* Set up the named return value optimization, if we can. Candidate
14239 variables are selected in check_return_expr. */
14240 if (current_function_return_value
)
14242 tree r
= current_function_return_value
;
14245 if (r
!= error_mark_node
14246 /* This is only worth doing for fns that return in memory--and
14247 simpler, since we don't have to worry about promoted modes. */
14248 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14249 /* Only allow this for variables declared in the outer scope of
14250 the function so we know that their lifetime always ends with a
14251 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14252 we were to do this optimization in tree-ssa. */
14253 && (outer
= outer_curly_brace_block (fndecl
))
14254 && chain_member (r
, BLOCK_VARS (outer
)))
14255 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14257 current_function_return_value
= NULL_TREE
;
14260 /* Remember that we were in class scope. */
14261 if (current_class_name
)
14262 ctype
= current_class_type
;
14264 /* Must mark the RESULT_DECL as being in this function. */
14265 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14267 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14268 to the FUNCTION_DECL node itself. */
14269 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14271 /* Save away current state, if appropriate. */
14272 if (!processing_template_decl
)
14273 save_function_data (fndecl
);
14275 /* Complain if there's just no return statement. */
14276 if (warn_return_type
14277 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14278 && !dependent_type_p (TREE_TYPE (fntype
))
14279 && !current_function_returns_value
&& !current_function_returns_null
14280 /* Don't complain if we abort or throw. */
14281 && !current_function_returns_abnormally
14282 /* Don't complain if there's an infinite loop. */
14283 && !current_function_infinite_loop
14284 /* Don't complain if we are declared noreturn. */
14285 && !TREE_THIS_VOLATILE (fndecl
)
14286 && !DECL_NAME (DECL_RESULT (fndecl
))
14287 && !TREE_NO_WARNING (fndecl
)
14288 /* Structor return values (if any) are set by the compiler. */
14289 && !DECL_CONSTRUCTOR_P (fndecl
)
14290 && !DECL_DESTRUCTOR_P (fndecl
)
14291 && targetm
.warn_func_return (fndecl
))
14293 warning (OPT_Wreturn_type
,
14294 "no return statement in function returning non-void");
14295 TREE_NO_WARNING (fndecl
) = 1;
14298 /* Store the end of the function, so that we get good line number
14299 info for the epilogue. */
14300 cfun
->function_end_locus
= input_location
;
14302 /* Complain about parameters that are only set, but never otherwise used. */
14303 if (warn_unused_but_set_parameter
14304 && !processing_template_decl
14305 && errorcount
== unused_but_set_errorcount
14306 && !DECL_CLONED_FUNCTION_P (fndecl
))
14310 for (decl
= DECL_ARGUMENTS (fndecl
);
14312 decl
= DECL_CHAIN (decl
))
14313 if (TREE_USED (decl
)
14314 && TREE_CODE (decl
) == PARM_DECL
14315 && !DECL_READ_P (decl
)
14316 && DECL_NAME (decl
)
14317 && !DECL_ARTIFICIAL (decl
)
14318 && !TREE_NO_WARNING (decl
)
14319 && !DECL_IN_SYSTEM_HEADER (decl
)
14320 && TREE_TYPE (decl
) != error_mark_node
14321 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14322 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14323 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14324 warning (OPT_Wunused_but_set_parameter
,
14325 "parameter %q+D set but not used", decl
);
14326 unused_but_set_errorcount
= errorcount
;
14329 /* Complain about locally defined typedefs that are not used in this
14331 maybe_warn_unused_local_typedefs ();
14333 /* Genericize before inlining. */
14334 if (!processing_template_decl
)
14336 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14337 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14338 cp_genericize (fndecl
);
14339 /* Clear out the bits we don't need. */
14340 f
->x_current_class_ptr
= NULL
;
14341 f
->x_current_class_ref
= NULL
;
14342 f
->x_eh_spec_block
= NULL
;
14343 f
->x_in_charge_parm
= NULL
;
14344 f
->x_vtt_parm
= NULL
;
14345 f
->x_return_value
= NULL
;
14346 f
->bindings
= NULL
;
14347 f
->extern_decl_map
= NULL
;
14348 f
->infinite_loops
= NULL
;
14350 /* Clear out the bits we don't need. */
14351 local_names
= NULL
;
14353 /* We're leaving the context of this function, so zap cfun. It's still in
14354 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14356 current_function_decl
= NULL
;
14358 /* If this is an in-class inline definition, we may have to pop the
14359 bindings for the template parameters that we added in
14360 maybe_begin_member_template_processing when start_function was
14362 if (inclass_inline
)
14363 maybe_end_member_template_processing ();
14365 /* Leave the scope of the class. */
14367 pop_nested_class ();
14372 current_function_decl
= NULL_TREE
;
14374 defer_mark_used_calls
= false;
14375 if (deferred_mark_used_calls
)
14380 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14382 vec_free (deferred_mark_used_calls
);
14388 /* Create the FUNCTION_DECL for a function definition.
14389 DECLSPECS and DECLARATOR are the parts of the declaration;
14390 they describe the return type and the name of the function,
14391 but twisted together in a fashion that parallels the syntax of C.
14393 This function creates a binding context for the function body
14394 as well as setting up the FUNCTION_DECL in current_function_decl.
14396 Returns a FUNCTION_DECL on success.
14398 If the DECLARATOR is not suitable for a function (it defines a datum
14399 instead), we return 0, which tells yyparse to report a parse error.
14401 May return void_type_node indicating that this method is actually
14402 a friend. See grokfield for more details.
14404 Came here with a `.pushlevel' .
14406 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14407 CHANGES TO CODE IN `grokfield'. */
14410 grokmethod (cp_decl_specifier_seq
*declspecs
,
14411 const cp_declarator
*declarator
, tree attrlist
)
14413 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14416 if (fndecl
== error_mark_node
)
14417 return error_mark_node
;
14419 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14421 error ("invalid member function declaration");
14422 return error_mark_node
;
14426 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14428 /* Pass friends other than inline friend functions back. */
14429 if (fndecl
== void_type_node
)
14432 if (DECL_IN_AGGR_P (fndecl
))
14434 if (DECL_CLASS_SCOPE_P (fndecl
))
14435 error ("%qD is already defined in class %qT", fndecl
,
14436 DECL_CONTEXT (fndecl
));
14437 return error_mark_node
;
14440 check_template_shadow (fndecl
);
14442 DECL_COMDAT (fndecl
) = 1;
14443 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14444 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14446 /* We process method specializations in finish_struct_1. */
14447 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14449 fndecl
= push_template_decl (fndecl
);
14450 if (fndecl
== error_mark_node
)
14454 if (! DECL_FRIEND_P (fndecl
))
14456 if (DECL_CHAIN (fndecl
))
14458 fndecl
= copy_node (fndecl
);
14459 TREE_CHAIN (fndecl
) = NULL_TREE
;
14463 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14465 DECL_IN_AGGR_P (fndecl
) = 1;
14470 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14471 we can lay it out later, when and if its type becomes complete.
14473 Also handle constexpr variables where the initializer involves
14474 an unlowered PTRMEM_CST because the class isn't complete yet. */
14477 maybe_register_incomplete_var (tree var
)
14479 gcc_assert (VAR_P (var
));
14481 /* Keep track of variables with incomplete types. */
14482 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14483 && DECL_EXTERNAL (var
))
14485 tree inner_type
= TREE_TYPE (var
);
14487 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14488 inner_type
= TREE_TYPE (inner_type
);
14489 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14491 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14492 /* RTTI TD entries are created while defining the type_info. */
14493 || (TYPE_LANG_SPECIFIC (inner_type
)
14494 && TYPE_BEING_DEFINED (inner_type
)))
14496 incomplete_var iv
= {var
, inner_type
};
14497 vec_safe_push (incomplete_vars
, iv
);
14499 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14500 && decl_constant_var_p (var
)
14501 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14503 /* When the outermost open class is complete we can resolve any
14504 pointers-to-members. */
14505 tree context
= outermost_open_class ();
14506 incomplete_var iv
= {var
, context
};
14507 vec_safe_push (incomplete_vars
, iv
);
14512 /* Called when a class type (given by TYPE) is defined. If there are
14513 any existing VAR_DECLs whose type has been completed by this
14514 declaration, update them now. */
14517 complete_vars (tree type
)
14520 incomplete_var
*iv
;
14522 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14524 if (same_type_p (type
, iv
->incomplete_type
))
14526 tree var
= iv
->decl
;
14527 tree type
= TREE_TYPE (var
);
14529 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14530 == iv
->incomplete_type
)
14532 /* Complete the type of the variable. The VAR_DECL itself
14533 will be laid out in expand_expr. */
14534 complete_type (type
);
14535 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14538 if (DECL_INITIAL (var
)
14539 && decl_constant_var_p (var
))
14540 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14542 /* Remove this entry from the list. */
14543 incomplete_vars
->unordered_remove (ix
);
14549 /* Check for pending declarations which may have abstract type. */
14550 complete_type_check_abstract (type
);
14553 /* If DECL is of a type which needs a cleanup, build and return an
14554 expression to perform that cleanup here. Return NULL_TREE if no
14555 cleanup need be done. */
14558 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14564 /* Assume no cleanup is required. */
14565 cleanup
= NULL_TREE
;
14567 if (error_operand_p (decl
))
14570 /* Handle "__attribute__((cleanup))". We run the cleanup function
14571 before the destructor since the destructor is what actually
14572 terminates the lifetime of the object. */
14573 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14580 /* Get the name specified by the user for the cleanup function. */
14581 id
= TREE_VALUE (TREE_VALUE (attr
));
14582 /* Look up the name to find the cleanup function to call. It is
14583 important to use lookup_name here because that is what is
14584 used in c-common.c:handle_cleanup_attribute when performing
14585 initial checks on the attribute. Note that those checks
14586 include ensuring that the function found is not an overloaded
14587 function, or an object with an overloaded call operator,
14588 etc.; we can rely on the fact that the function found is an
14589 ordinary FUNCTION_DECL. */
14590 fn
= lookup_name (id
);
14591 arg
= build_address (decl
);
14593 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14594 if (cleanup
== error_mark_node
)
14595 return error_mark_node
;
14597 /* Handle ordinary C++ destructors. */
14598 type
= TREE_TYPE (decl
);
14599 if (type_build_dtor_call (type
))
14601 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14605 if (TREE_CODE (type
) == ARRAY_TYPE
)
14608 addr
= build_address (decl
);
14610 call
= build_delete (TREE_TYPE (addr
), addr
,
14611 sfk_complete_destructor
, flags
, 0, complain
);
14612 if (call
== error_mark_node
)
14613 cleanup
= error_mark_node
;
14614 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14615 /* Discard the call. */;
14617 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14622 /* build_delete sets the location of the destructor call to the
14623 current location, even though the destructor is going to be
14624 called later, at the end of the current scope. This can lead to
14625 a "jumpy" behaviour for users of debuggers when they step around
14626 the end of the block. So let's unset the location of the
14627 destructor call instead. */
14628 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14629 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14632 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14633 /* Treat objects with destructors as used; the destructor may do
14634 something substantive. */
14641 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14642 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14643 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14646 static_fn_type (tree memfntype
)
14651 if (TYPE_PTRMEMFUNC_P (memfntype
))
14652 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14653 if (POINTER_TYPE_P (memfntype
)
14654 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14655 memfntype
= TREE_TYPE (memfntype
);
14656 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14658 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14659 args
= TYPE_ARG_TYPES (memfntype
);
14660 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14661 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14662 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14663 fntype
= (cp_build_type_attribute_variant
14664 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14665 fntype
= (build_exception_variant
14666 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14667 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14668 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14672 /* DECL was originally constructed as a non-static member function,
14673 but turned out to be static. Update it accordingly. */
14676 revert_static_member_fn (tree decl
)
14678 tree stype
= static_fn_type (decl
);
14679 cp_cv_quals quals
= type_memfn_quals (stype
);
14680 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14682 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14683 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14685 TREE_TYPE (decl
) = stype
;
14687 if (DECL_ARGUMENTS (decl
))
14688 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14689 DECL_STATIC_FUNCTION_P (decl
) = 1;
14692 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14693 one of the language-independent trees. */
14695 enum cp_tree_node_structure_enum
14696 cp_tree_node_structure (union lang_tree_node
* t
)
14698 switch (TREE_CODE (&t
->generic
))
14700 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14701 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14702 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14703 case OVERLOAD
: return TS_CP_OVERLOAD
;
14704 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14705 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14706 case BASELINK
: return TS_CP_BASELINK
;
14707 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14708 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14709 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14710 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14711 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14712 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14713 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14714 default: return TS_CP_GENERIC
;
14718 /* Build the void_list_node (void_type_node having been created). */
14720 build_void_list_node (void)
14722 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14727 cp_missing_noreturn_ok_p (tree decl
)
14729 /* A missing noreturn is ok for the `main' function. */
14730 return DECL_MAIN_P (decl
);
14733 /* Return the decl used to identify the COMDAT group into which DECL should
14737 cxx_comdat_group (tree decl
)
14739 /* Virtual tables, construction virtual tables, and virtual table
14740 tables all go in a single COMDAT group, named after the primary
14742 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14743 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14744 /* For all other DECLs, the COMDAT group is the mangled name of the
14745 declaration itself. */
14748 while (DECL_THUNK_P (decl
))
14750 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14751 into the same section as the target function. In that case
14752 we must return target's name. */
14753 tree target
= THUNK_TARGET (decl
);
14754 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14755 && DECL_SECTION_NAME (target
) != NULL
14756 && DECL_ONE_ONLY (target
))
14766 /* Returns the return type for FN as written by the user, which may include
14767 a placeholder for a deduced return type. */
14770 fndecl_declared_return_type (tree fn
)
14772 fn
= STRIP_TEMPLATE (fn
);
14773 if (FNDECL_USED_AUTO (fn
))
14775 struct language_function
*f
= NULL
;
14776 if (DECL_STRUCT_FUNCTION (fn
))
14777 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14779 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14780 return f
->x_auto_return_pattern
;
14782 return TREE_TYPE (TREE_TYPE (fn
));
14785 /* Returns true iff DECL was declared with an auto return type and it has
14786 not yet been deduced to a real type. */
14789 undeduced_auto_decl (tree decl
)
14791 if (cxx_dialect
< cxx14
)
14793 return type_uses_auto (TREE_TYPE (decl
));
14796 /* Complain if DECL has an undeduced return type. */
14799 require_deduced_type (tree decl
)
14801 if (undeduced_auto_decl (decl
))
14802 error ("use of %qD before deduction of %<auto%>", decl
);
14805 #include "gt-cp-decl.h"