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 if (DECL_SOURCE_LOCATION (newdecl
)
1926 != DECL_SOURCE_LOCATION (olddecl
))
1927 check_redeclaration_no_default_args (newdecl
);
1929 check_default_args (newdecl
);
1931 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1932 && DECL_INITIAL (new_result
))
1934 if (DECL_INITIAL (old_result
))
1935 DECL_UNINLINABLE (old_result
) = 1;
1937 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1938 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1939 DECL_NOT_REALLY_EXTERN (old_result
)
1940 = DECL_NOT_REALLY_EXTERN (new_result
);
1941 DECL_INTERFACE_KNOWN (old_result
)
1942 = DECL_INTERFACE_KNOWN (new_result
);
1943 DECL_DECLARED_INLINE_P (old_result
)
1944 = DECL_DECLARED_INLINE_P (new_result
);
1945 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1946 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1951 DECL_DECLARED_INLINE_P (old_result
)
1952 |= DECL_DECLARED_INLINE_P (new_result
);
1953 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1954 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1955 check_redeclaration_exception_specification (newdecl
, olddecl
);
1959 /* If the new declaration is a definition, update the file and
1960 line information on the declaration, and also make
1961 the old declaration the same definition. */
1962 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1964 DECL_SOURCE_LOCATION (olddecl
)
1965 = DECL_SOURCE_LOCATION (old_result
)
1966 = DECL_SOURCE_LOCATION (newdecl
);
1967 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1968 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1971 DECL_ARGUMENTS (old_result
)
1972 = DECL_ARGUMENTS (new_result
);
1973 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1974 parm
= DECL_CHAIN (parm
))
1975 DECL_CONTEXT (parm
) = old_result
;
1984 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1985 check_redeclaration_exception_specification (newdecl
, olddecl
);
1987 /* Automatically handles default parameters. */
1988 tree oldtype
= TREE_TYPE (olddecl
);
1991 /* For typedefs use the old type, as the new type's DECL_NAME points
1992 at newdecl, which will be ggc_freed. */
1993 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1996 /* Merge the data types specified in the two decls. */
1997 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1999 if (VAR_P (newdecl
))
2001 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
2002 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
2003 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
2004 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
2005 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
2006 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
2008 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2009 if (DECL_LANG_SPECIFIC (olddecl
)
2010 && CP_DECL_THREADPRIVATE_P (olddecl
))
2012 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2013 if (!DECL_LANG_SPECIFIC (newdecl
))
2014 retrofit_lang_decl (newdecl
);
2016 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2020 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2022 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2023 check_default_args (newdecl
);
2025 /* Lay the type out, unless already done. */
2026 if (! same_type_p (newtype
, oldtype
)
2027 && TREE_TYPE (newdecl
) != error_mark_node
2028 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2029 layout_type (TREE_TYPE (newdecl
));
2031 if ((VAR_P (newdecl
)
2032 || TREE_CODE (newdecl
) == PARM_DECL
2033 || TREE_CODE (newdecl
) == RESULT_DECL
2034 || TREE_CODE (newdecl
) == FIELD_DECL
2035 || TREE_CODE (newdecl
) == TYPE_DECL
)
2036 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2037 layout_decl (newdecl
, 0);
2039 /* Merge the type qualifiers. */
2040 if (TREE_READONLY (newdecl
))
2041 TREE_READONLY (olddecl
) = 1;
2042 if (TREE_THIS_VOLATILE (newdecl
))
2043 TREE_THIS_VOLATILE (olddecl
) = 1;
2044 if (TREE_NOTHROW (newdecl
))
2045 TREE_NOTHROW (olddecl
) = 1;
2047 /* Merge deprecatedness. */
2048 if (TREE_DEPRECATED (newdecl
))
2049 TREE_DEPRECATED (olddecl
) = 1;
2051 /* Preserve function specific target and optimization options */
2052 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2054 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2055 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2056 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2057 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2059 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2060 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2061 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2062 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2065 /* Merge the initialization information. */
2066 if (DECL_INITIAL (newdecl
) == NULL_TREE
2067 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2069 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2070 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2071 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2073 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2074 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2078 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2080 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2081 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2082 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2083 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2084 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2085 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2086 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2087 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2088 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2089 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2090 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2091 /* Keep the old RTL. */
2092 COPY_DECL_RTL (olddecl
, newdecl
);
2094 else if (VAR_P (newdecl
)
2095 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2097 /* Keep the old RTL. We cannot keep the old RTL if the old
2098 declaration was for an incomplete object and the new
2099 declaration is not since many attributes of the RTL will
2101 COPY_DECL_RTL (olddecl
, newdecl
);
2104 /* If cannot merge, then use the new type and qualifiers,
2105 and don't preserve the old rtl. */
2108 /* Clean out any memory we had of the old declaration. */
2109 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2111 TREE_VALUE (oldstatic
) = error_mark_node
;
2113 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2114 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2115 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2116 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2119 /* Merge the storage class information. */
2120 merge_weak (newdecl
, olddecl
);
2122 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2123 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2124 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2125 if (! DECL_EXTERNAL (olddecl
))
2126 DECL_EXTERNAL (newdecl
) = 0;
2128 new_template_info
= NULL_TREE
;
2129 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2131 bool new_redefines_gnu_inline
= false;
2133 if (new_defines_function
2134 && ((DECL_INTERFACE_KNOWN (olddecl
)
2135 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2136 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2137 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2138 == FUNCTION_DECL
))))
2142 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2143 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2145 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2148 if (!new_redefines_gnu_inline
)
2150 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2151 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2152 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2154 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2155 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2156 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2158 /* If the OLDDECL is an instantiation and/or specialization,
2159 then the NEWDECL must be too. But, it may not yet be marked
2160 as such if the caller has created NEWDECL, but has not yet
2161 figured out that it is a redeclaration. */
2162 if (!DECL_USE_TEMPLATE (newdecl
))
2163 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2165 /* Don't really know how much of the language-specific
2166 values we should copy from old to new. */
2167 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2168 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2169 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2170 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2172 if (LANG_DECL_HAS_MIN (newdecl
))
2174 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2175 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2176 if (DECL_TEMPLATE_INFO (newdecl
))
2178 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2179 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2180 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2181 /* Remember the presence of explicit specialization args. */
2182 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2183 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2185 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2187 /* Only functions have these fields. */
2188 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2190 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2191 DECL_BEFRIENDING_CLASSES (newdecl
)
2192 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2193 DECL_BEFRIENDING_CLASSES (olddecl
));
2194 /* DECL_THUNKS is only valid for virtual functions,
2195 otherwise it is a DECL_FRIEND_CONTEXT. */
2196 if (DECL_VIRTUAL_P (newdecl
))
2197 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2199 /* Only variables have this field. */
2200 else if (VAR_P (newdecl
)
2201 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2202 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2205 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2209 /* Merge parameter attributes. */
2210 tree oldarg
, newarg
;
2211 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2212 newarg
= DECL_ARGUMENTS(newdecl
);
2214 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2215 DECL_ATTRIBUTES (newarg
)
2216 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2217 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2220 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2221 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2223 /* If newdecl is not a specialization, then it is not a
2224 template-related function at all. And that means that we
2225 should have exited above, returning 0. */
2226 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2228 if (DECL_ODR_USED (olddecl
))
2229 /* From [temp.expl.spec]:
2231 If a template, a member template or the member of a class
2232 template is explicitly specialized then that
2233 specialization shall be declared before the first use of
2234 that specialization that would cause an implicit
2235 instantiation to take place, in every translation unit in
2236 which such a use occurs. */
2237 error ("explicit specialization of %qD after first use",
2240 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2241 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2242 && DECL_DECLARED_INLINE_P (newdecl
));
2244 /* Don't propagate visibility from the template to the
2245 specialization here. We'll do that in determine_visibility if
2247 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2249 /* [temp.expl.spec/14] We don't inline explicit specialization
2250 just because the primary template says so. */
2252 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2253 the always_inline attribute. */
2254 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2255 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2257 if (DECL_DECLARED_INLINE_P (newdecl
))
2258 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2260 DECL_ATTRIBUTES (newdecl
)
2261 = remove_attribute ("always_inline",
2262 DECL_ATTRIBUTES (newdecl
));
2265 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2267 /* Never inline re-defined extern inline functions.
2268 FIXME: this could be better handled by keeping both
2269 function as separate declarations. */
2270 DECL_UNINLINABLE (newdecl
) = 1;
2274 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2275 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2277 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2279 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2280 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2282 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2283 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2284 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2285 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2288 /* Preserve abstractness on cloned [cd]tors. */
2289 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2291 /* Update newdecl's parms to point at olddecl. */
2292 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2293 parm
= DECL_CHAIN (parm
))
2294 DECL_CONTEXT (parm
) = olddecl
;
2298 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2299 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2300 COPY_DECL_RTL (newdecl
, olddecl
);
2302 if (! types_match
|| new_defines_function
)
2304 /* These need to be copied so that the names are available.
2305 Note that if the types do match, we'll preserve inline
2306 info and other bits, but if not, we won't. */
2307 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2308 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2310 /* If redeclaring a builtin function, it stays built in
2311 if newdecl is a gnu_inline definition, or if newdecl is just
2313 if (DECL_BUILT_IN (olddecl
)
2314 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2316 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2317 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2318 /* If we're keeping the built-in definition, keep the rtl,
2319 regardless of declaration matches. */
2320 COPY_DECL_RTL (olddecl
, newdecl
);
2321 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2323 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2326 /* If a compatible prototype of these builtin functions
2327 is seen, assume the runtime implements it with the
2328 expected semantics. */
2329 case BUILT_IN_STPCPY
:
2330 if (builtin_decl_explicit_p (fncode
))
2331 set_builtin_decl_implicit_p (fncode
, true);
2334 if (builtin_decl_explicit_p (fncode
))
2335 set_builtin_decl_declared_p (fncode
, true);
2340 if (new_defines_function
)
2341 /* If defining a function declared with other language
2342 linkage, use the previously declared language linkage. */
2343 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2344 else if (types_match
)
2346 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2347 /* Don't clear out the arguments if we're just redeclaring a
2349 if (DECL_ARGUMENTS (olddecl
))
2350 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2353 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2354 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2356 /* Now preserve various other info from the definition. */
2357 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2358 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2359 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2360 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2362 /* Warn about conflicting visibility specifications. */
2363 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2364 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2365 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2367 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2368 "%qD: visibility attribute ignored because it "
2369 "conflicts with previous declaration", newdecl
))
2370 inform (DECL_SOURCE_LOCATION (olddecl
),
2371 "previous declaration of %qD", olddecl
);
2373 /* Choose the declaration which specified visibility. */
2374 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2376 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2377 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2379 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2380 so keep this behavior. */
2381 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2383 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2384 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2386 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2387 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2389 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2390 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2392 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2393 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2394 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2396 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2397 with that from NEWDECL below. */
2398 if (DECL_LANG_SPECIFIC (olddecl
))
2400 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2401 != DECL_LANG_SPECIFIC (newdecl
));
2402 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2405 /* Merge the USED information. */
2406 if (TREE_USED (olddecl
))
2407 TREE_USED (newdecl
) = 1;
2408 else if (TREE_USED (newdecl
))
2409 TREE_USED (olddecl
) = 1;
2410 if (VAR_P (newdecl
))
2412 if (DECL_READ_P (olddecl
))
2413 DECL_READ_P (newdecl
) = 1;
2414 else if (DECL_READ_P (newdecl
))
2415 DECL_READ_P (olddecl
) = 1;
2417 if (DECL_PRESERVE_P (olddecl
))
2418 DECL_PRESERVE_P (newdecl
) = 1;
2419 else if (DECL_PRESERVE_P (newdecl
))
2420 DECL_PRESERVE_P (olddecl
) = 1;
2422 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2423 to olddecl and deleted. */
2424 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2425 && DECL_FUNCTION_VERSIONED (olddecl
))
2427 /* Set the flag for newdecl so that it gets copied to olddecl. */
2428 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2429 /* newdecl will be purged after copying to olddecl and is no longer
2431 cgraph_node::delete_function_version (newdecl
);
2434 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2437 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2439 function_size
= sizeof (struct tree_decl_common
);
2441 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2442 (char *) newdecl
+ sizeof (struct tree_common
),
2443 function_size
- sizeof (struct tree_common
));
2445 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2446 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2447 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2449 /* Preserve symtab node mapping. */
2450 olddecl
->decl_with_vis
.symtab_node
= snode
;
2452 if (new_template_info
)
2453 /* If newdecl is a template instantiation, it is possible that
2454 the following sequence of events has occurred:
2456 o A friend function was declared in a class template. The
2457 class template was instantiated.
2459 o The instantiation of the friend declaration was
2460 recorded on the instantiation list, and is newdecl.
2462 o Later, however, instantiate_class_template called pushdecl
2463 on the newdecl to perform name injection. But, pushdecl in
2464 turn called duplicate_decls when it discovered that another
2465 declaration of a global function with the same name already
2468 o Here, in duplicate_decls, we decided to clobber newdecl.
2470 If we're going to do that, we'd better make sure that
2471 olddecl, and not newdecl, is on the list of
2472 instantiations so that if we try to do the instantiation
2473 again we won't get the clobbered declaration. */
2474 reregister_specialization (newdecl
,
2480 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2482 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2483 (char *) newdecl
+ sizeof (struct tree_common
),
2484 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2485 switch (TREE_CODE (newdecl
))
2495 struct symtab_node
*snode
= NULL
;
2497 if (TREE_CODE (newdecl
) == VAR_DECL
2498 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2499 snode
= symtab_node::get (olddecl
);
2500 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2501 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2502 size
- sizeof (struct tree_decl_common
)
2503 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2504 if (TREE_CODE (newdecl
) == VAR_DECL
)
2505 olddecl
->decl_with_vis
.symtab_node
= snode
;
2509 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2510 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2511 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2512 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2517 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2518 || TREE_CODE (newdecl
) == VAR_DECL
)
2520 if (DECL_EXTERNAL (olddecl
)
2521 || TREE_PUBLIC (olddecl
)
2522 || TREE_STATIC (olddecl
))
2524 /* Merge the section attribute.
2525 We want to issue an error if the sections conflict but that must be
2526 done later in decl_attributes since we are called before attributes
2528 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2529 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2531 if (DECL_ONE_ONLY (newdecl
))
2533 struct symtab_node
*oldsym
, *newsym
;
2534 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2535 oldsym
= cgraph_node::get_create (olddecl
);
2537 oldsym
= varpool_node::get_create (olddecl
);
2538 newsym
= symtab_node::get (newdecl
);
2539 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2543 if (TREE_CODE (newdecl
) == VAR_DECL
2544 && DECL_THREAD_LOCAL_P (newdecl
))
2545 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2548 DECL_UID (olddecl
) = olddecl_uid
;
2550 DECL_FRIEND_P (olddecl
) = 1;
2553 DECL_ANTICIPATED (olddecl
) = 1;
2554 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2557 /* NEWDECL contains the merged attribute lists.
2558 Update OLDDECL to be the same. */
2559 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2561 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2562 so that encode_section_info has a chance to look at the new decl
2563 flags and attributes. */
2564 if (DECL_RTL_SET_P (olddecl
)
2565 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2567 && TREE_STATIC (olddecl
))))
2568 make_decl_rtl (olddecl
);
2570 /* The NEWDECL will no longer be needed. Because every out-of-class
2571 declaration of a member results in a call to duplicate_decls,
2572 freeing these nodes represents in a significant savings.
2574 Before releasing the node, be sore to remove function from symbol
2575 table that might have been inserted there to record comdat group.
2576 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2577 structure is shared in between newdecl and oldecl. */
2578 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2579 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2580 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2581 || TREE_CODE (newdecl
) == VAR_DECL
)
2583 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2592 /* Return zero if the declaration NEWDECL is valid
2593 when the declaration OLDDECL (assumed to be for the same name)
2594 has already been seen.
2595 Otherwise return an error message format string with a %s
2596 where the identifier should go. */
2599 redeclaration_error_message (tree newdecl
, tree olddecl
)
2601 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2603 /* Because C++ can put things into name space for free,
2604 constructs like "typedef struct foo { ... } foo"
2605 would look like an erroneous redeclaration. */
2606 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2609 return G_("redefinition of %q#D");
2611 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2613 /* If this is a pure function, its olddecl will actually be
2614 the original initialization to `0' (which we force to call
2615 abort()). Don't complain about redefinition in this case. */
2616 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2617 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2620 /* If both functions come from different namespaces, this is not
2621 a redeclaration - this is a conflict with a used function. */
2622 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2623 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2624 && ! decls_match (olddecl
, newdecl
))
2625 return G_("%qD conflicts with used function");
2627 /* We'll complain about linkage mismatches in
2628 warn_extern_redeclared_static. */
2630 /* Defining the same name twice is no good. */
2631 if (DECL_INITIAL (olddecl
) != NULL_TREE
2632 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2634 if (DECL_NAME (olddecl
) == NULL_TREE
)
2635 return G_("%q#D not declared in class");
2636 else if (!GNU_INLINE_P (olddecl
)
2637 || GNU_INLINE_P (newdecl
))
2638 return G_("redefinition of %q#D");
2641 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2643 bool olda
= GNU_INLINE_P (olddecl
);
2644 bool newa
= GNU_INLINE_P (newdecl
);
2649 return G_("%q+D redeclared inline with "
2650 "%<gnu_inline%> attribute");
2652 return G_("%q+D redeclared inline without "
2653 "%<gnu_inline%> attribute");
2657 check_abi_tag_redeclaration
2658 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2659 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2663 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2667 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2669 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2670 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2671 return G_("redefinition of %q#D");
2675 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2676 || (DECL_TEMPLATE_RESULT (newdecl
)
2677 == DECL_TEMPLATE_RESULT (olddecl
)))
2680 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2681 if (DECL_TEMPLATE_INFO (nt
))
2682 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2683 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2684 if (DECL_TEMPLATE_INFO (ot
))
2685 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2686 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2687 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2688 return G_("redefinition of %q#D");
2690 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2692 bool olda
= GNU_INLINE_P (ot
);
2693 bool newa
= GNU_INLINE_P (nt
);
2698 return G_("%q+D redeclared inline with "
2699 "%<gnu_inline%> attribute");
2701 return G_("%q+D redeclared inline without "
2702 "%<gnu_inline%> attribute");
2706 /* Core issue #226 (C++0x):
2708 If a friend function template declaration specifies a
2709 default template-argument, that declaration shall be a
2710 definition and shall be the only declaration of the
2711 function template in the translation unit. */
2712 if ((cxx_dialect
!= cxx98
)
2713 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2714 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2715 /*is_primary=*/true,
2716 /*is_partial=*/false,
2717 /*is_friend_decl=*/2))
2718 return G_("redeclaration of friend %q#D "
2719 "may not have default template arguments");
2723 else if (VAR_P (newdecl
)
2724 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2725 && (! DECL_LANG_SPECIFIC (olddecl
)
2726 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2727 || DECL_THREAD_LOCAL_P (newdecl
)))
2729 /* Only variables can be thread-local, and all declarations must
2730 agree on this property. */
2731 if (DECL_THREAD_LOCAL_P (newdecl
))
2732 return G_("thread-local declaration of %q#D follows "
2733 "non-thread-local declaration");
2735 return G_("non-thread-local declaration of %q#D follows "
2736 "thread-local declaration");
2738 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2740 /* The objects have been declared at namespace scope. If either
2741 is a member of an anonymous union, then this is an invalid
2742 redeclaration. For example:
2748 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2749 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2750 return G_("redeclaration of %q#D");
2751 /* If at least one declaration is a reference, there is no
2752 conflict. For example:
2758 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2760 /* Reject two definitions. */
2761 return G_("redefinition of %q#D");
2765 /* Objects declared with block scope: */
2766 /* Reject two definitions, and reject a definition
2767 together with an external reference. */
2768 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2769 return G_("redeclaration of %q#D");
2774 /* Hash and equality functions for the named_label table. */
2777 named_label_hasher::hash (named_label_entry
*ent
)
2779 return DECL_UID (ent
->label_decl
);
2783 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2785 return a
->label_decl
== b
->label_decl
;
2788 /* Create a new label, named ID. */
2791 make_label_decl (tree id
, int local_p
)
2793 struct named_label_entry
*ent
;
2796 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2798 DECL_CONTEXT (decl
) = current_function_decl
;
2799 DECL_MODE (decl
) = VOIDmode
;
2800 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2802 /* Say where one reference is to the label, for the sake of the
2803 error if it is not defined. */
2804 DECL_SOURCE_LOCATION (decl
) = input_location
;
2806 /* Record the fact that this identifier is bound to this label. */
2807 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2809 /* Create the label htab for the function on demand. */
2811 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2813 /* Record this label on the list of labels used in this function.
2814 We do this before calling make_label_decl so that we get the
2815 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2816 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2817 ent
->label_decl
= decl
;
2819 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2820 gcc_assert (*slot
== NULL
);
2826 /* Look for a label named ID in the current function. If one cannot
2827 be found, create one. (We keep track of used, but undefined,
2828 labels, and complain about them at the end of a function.) */
2831 lookup_label_1 (tree id
)
2835 /* You can't use labels at global scope. */
2836 if (current_function_decl
== NULL_TREE
)
2838 error ("label %qE referenced outside of any function", id
);
2842 /* See if we've already got this label. */
2843 decl
= IDENTIFIER_LABEL_VALUE (id
);
2844 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2847 decl
= make_label_decl (id
, /*local_p=*/0);
2851 /* Wrapper for lookup_label_1. */
2854 lookup_label (tree id
)
2857 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2858 ret
= lookup_label_1 (id
);
2859 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2863 /* Declare a local label named ID. */
2866 declare_local_label (tree id
)
2869 cp_label_binding bind
;
2871 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2872 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2873 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2875 decl
= make_label_decl (id
, /*local_p=*/1);
2877 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2882 /* Returns nonzero if it is ill-formed to jump past the declaration of
2883 DECL. Returns 2 if it's also a real problem. */
2886 decl_jump_unsafe (tree decl
)
2888 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2889 with automatic storage duration is not in scope to a point where it is
2890 in scope is ill-formed unless the variable has scalar type, class type
2891 with a trivial default constructor and a trivial destructor, a
2892 cv-qualified version of one of these types, or an array of one of the
2893 preceding types and is declared without an initializer (8.5). */
2894 tree type
= TREE_TYPE (decl
);
2896 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2897 || type
== error_mark_node
)
2900 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2901 || variably_modified_type_p (type
, NULL_TREE
))
2904 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2910 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2913 identify_goto (tree decl
, const location_t
*locus
)
2915 bool complained
= (decl
2916 ? permerror (input_location
, "jump to label %qD", decl
)
2917 : permerror (input_location
, "jump to case label"));
2918 if (complained
&& locus
)
2919 inform (*locus
, " from here");
2923 /* Check that a single previously seen jump to a newly defined label
2924 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2925 the jump context; NAMES are the names in scope in LEVEL at the jump
2926 context; LOCUS is the source position of the jump or 0. Returns
2927 true if all is well. */
2930 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2931 bool exited_omp
, const location_t
*locus
)
2933 cp_binding_level
*b
;
2934 bool identified
= false, complained
= false;
2935 bool saw_eh
= false, saw_omp
= false;
2939 complained
= identify_goto (decl
, locus
);
2941 inform (input_location
, " exits OpenMP structured block");
2942 identified
= saw_omp
= true;
2945 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2947 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2949 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2950 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2951 : TREE_CHAIN (new_decls
)))
2953 int problem
= decl_jump_unsafe (new_decls
);
2959 complained
= identify_goto (decl
, locus
);
2965 inform (input_location
,
2966 " crosses initialization of %q+#D", new_decls
);
2968 inform (input_location
, " enters scope of %q+#D which has "
2969 "non-trivial destructor", new_decls
);
2975 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2979 complained
= identify_goto (decl
, locus
);
2984 if (b
->kind
== sk_try
)
2985 inform (input_location
, " enters try block");
2987 inform (input_location
, " enters catch block");
2991 if (b
->kind
== sk_omp
&& !saw_omp
)
2995 complained
= identify_goto (decl
, locus
);
2999 inform (input_location
, " enters OpenMP structured block");
3008 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
3010 check_previous_goto_1 (decl
, use
->binding_level
,
3011 use
->names_in_scope
, use
->in_omp_scope
,
3012 &use
->o_goto_locus
);
3016 check_switch_goto (cp_binding_level
* level
)
3018 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3021 /* Check that a new jump to a label DECL is OK. Called by
3022 finish_goto_stmt. */
3025 check_goto (tree decl
)
3027 struct named_label_entry
*ent
, dummy
;
3028 bool saw_catch
= false, identified
= false, complained
= false;
3032 /* We can't know where a computed goto is jumping.
3033 So we assume that it's OK. */
3034 if (TREE_CODE (decl
) != LABEL_DECL
)
3037 /* We didn't record any information about this label when we created it,
3038 and there's not much point since it's trivial to analyze as a return. */
3039 if (decl
== cdtor_label
)
3042 dummy
.label_decl
= decl
;
3043 ent
= named_labels
->find (&dummy
);
3044 gcc_assert (ent
!= NULL
);
3046 /* If the label hasn't been defined yet, defer checking. */
3047 if (! DECL_INITIAL (decl
))
3049 struct named_label_use_entry
*new_use
;
3051 /* Don't bother creating another use if the last goto had the
3052 same data, and will therefore create the same set of errors. */
3054 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3057 new_use
= ggc_alloc
<named_label_use_entry
> ();
3058 new_use
->binding_level
= current_binding_level
;
3059 new_use
->names_in_scope
= current_binding_level
->names
;
3060 new_use
->o_goto_locus
= input_location
;
3061 new_use
->in_omp_scope
= false;
3063 new_use
->next
= ent
->uses
;
3064 ent
->uses
= new_use
;
3068 if (ent
->in_try_scope
|| ent
->in_catch_scope
3069 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3071 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3073 inform (input_location
, " from here");
3077 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3079 int u
= decl_jump_unsafe (bad
);
3081 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3083 /* Can't skip init of __exception_info. */
3085 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3088 else if (complained
)
3091 inform (input_location
, " skips initialization of %q+#D", bad
);
3093 inform (input_location
, " enters scope of %q+#D which has "
3094 "non-trivial destructor", bad
);
3100 if (ent
->in_try_scope
)
3101 inform (input_location
, " enters try block");
3102 else if (ent
->in_catch_scope
&& !saw_catch
)
3103 inform (input_location
, " enters catch block");
3106 if (ent
->in_omp_scope
)
3109 inform (input_location
, " enters OpenMP structured block");
3111 else if (flag_openmp
)
3113 cp_binding_level
*b
;
3114 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3116 if (b
== ent
->binding_level
)
3118 if (b
->kind
== sk_omp
)
3122 complained
= permerror (input_location
,
3123 "jump to label %q+D", decl
);
3125 inform (input_location
, " from here");
3129 inform (input_location
, " exits OpenMP structured block");
3136 /* Check that a return is ok wrt OpenMP structured blocks.
3137 Called by finish_return_stmt. Returns true if all is well. */
3140 check_omp_return (void)
3142 cp_binding_level
*b
;
3143 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3144 if (b
->kind
== sk_omp
)
3146 error ("invalid exit from OpenMP structured block");
3149 else if (b
->kind
== sk_function_parms
)
3154 /* Define a label, specifying the location in the source file.
3155 Return the LABEL_DECL node for the label. */
3158 define_label_1 (location_t location
, tree name
)
3160 struct named_label_entry
*ent
, dummy
;
3161 cp_binding_level
*p
;
3164 decl
= lookup_label (name
);
3166 dummy
.label_decl
= decl
;
3167 ent
= named_labels
->find (&dummy
);
3168 gcc_assert (ent
!= NULL
);
3170 /* After labels, make any new cleanups in the function go into their
3171 own new (temporary) binding contour. */
3172 for (p
= current_binding_level
;
3173 p
->kind
!= sk_function_parms
;
3175 p
->more_cleanups_ok
= 0;
3177 if (name
== get_identifier ("wchar_t"))
3178 permerror (input_location
, "label named wchar_t");
3180 if (DECL_INITIAL (decl
) != NULL_TREE
)
3182 error ("duplicate label %qD", decl
);
3183 return error_mark_node
;
3187 struct named_label_use_entry
*use
;
3189 /* Mark label as having been defined. */
3190 DECL_INITIAL (decl
) = error_mark_node
;
3191 /* Say where in the source. */
3192 DECL_SOURCE_LOCATION (decl
) = location
;
3194 ent
->binding_level
= current_binding_level
;
3195 ent
->names_in_scope
= current_binding_level
->names
;
3197 for (use
= ent
->uses
; use
; use
= use
->next
)
3198 check_previous_goto (decl
, use
);
3205 /* Wrapper for define_label_1. */
3208 define_label (location_t location
, tree name
)
3211 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3212 ret
= define_label_1 (location
, name
);
3213 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3220 cp_binding_level
*level
;
3221 struct cp_switch
*next
;
3222 /* The SWITCH_STMT being built. */
3224 /* A splay-tree mapping the low element of a case range to the high
3225 element, or NULL_TREE if there is no high element. Used to
3226 determine whether or not a new case label duplicates an old case
3227 label. We need a tree, rather than simply a hash table, because
3228 of the GNU case range extension. */
3232 /* A stack of the currently active switch statements. The innermost
3233 switch statement is on the top of the stack. There is no need to
3234 mark the stack for garbage collection because it is only active
3235 during the processing of the body of a function, and we never
3236 collect at that point. */
3238 static struct cp_switch
*switch_stack
;
3240 /* Called right after a switch-statement condition is parsed.
3241 SWITCH_STMT is the switch statement being parsed. */
3244 push_switch (tree switch_stmt
)
3246 struct cp_switch
*p
= XNEW (struct cp_switch
);
3247 p
->level
= current_binding_level
;
3248 p
->next
= switch_stack
;
3249 p
->switch_stmt
= switch_stmt
;
3250 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3257 struct cp_switch
*cs
= switch_stack
;
3258 location_t switch_location
;
3260 /* Emit warnings as needed. */
3261 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3262 if (!processing_template_decl
)
3263 c_do_switch_warnings (cs
->cases
, switch_location
,
3264 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3265 SWITCH_STMT_COND (cs
->switch_stmt
));
3267 splay_tree_delete (cs
->cases
);
3268 switch_stack
= switch_stack
->next
;
3272 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3273 condition. Note that if TYPE and VALUE are already integral we don't
3274 really do the conversion because the language-independent
3275 warning/optimization code will work better that way. */
3278 case_conversion (tree type
, tree value
)
3280 if (value
== NULL_TREE
)
3283 if (cxx_dialect
>= cxx11
3284 && (SCOPED_ENUM_P (type
)
3285 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3287 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3288 type
= type_promotes_to (type
);
3289 value
= (perform_implicit_conversion_flags
3290 (type
, value
, tf_warning_or_error
,
3291 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3293 return cxx_constant_value (value
);
3296 /* Note that we've seen a definition of a case label, and complain if this
3297 is a bad place for one. */
3300 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3303 cp_binding_level
*p
;
3306 if (processing_template_decl
)
3310 /* For templates, just add the case label; we'll do semantic
3311 analysis at instantiation-time. */
3312 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3313 return add_stmt (build_case_label (low_value
, high_value
, label
));
3316 /* Find the condition on which this switch statement depends. */
3317 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3318 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3319 cond
= TREE_VALUE (cond
);
3321 if (!check_switch_goto (switch_stack
->level
))
3322 return error_mark_node
;
3324 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3326 low_value
= case_conversion (type
, low_value
);
3327 high_value
= case_conversion (type
, high_value
);
3329 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3330 low_value
, high_value
);
3332 /* After labels, make any new cleanups in the function go into their
3333 own new (temporary) binding contour. */
3334 for (p
= current_binding_level
;
3335 p
->kind
!= sk_function_parms
;
3337 p
->more_cleanups_ok
= 0;
3342 struct typename_info
{
3350 struct typename_hasher
: ggc_hasher
<tree
>
3352 typedef typename_info
*compare_type
;
3354 /* Hash a TYPENAME_TYPE. */
3361 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3362 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3367 /* Compare two TYPENAME_TYPEs. */
3370 equal (tree t1
, const typename_info
*t2
)
3372 return (TYPE_IDENTIFIER (t1
) == t2
->name
3373 && TYPE_CONTEXT (t1
) == t2
->scope
3374 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3375 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3376 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3380 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3381 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3383 Returns the new TYPENAME_TYPE. */
3385 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3388 build_typename_type (tree context
, tree name
, tree fullname
,
3389 enum tag_types tag_type
)
3397 if (typename_htab
== NULL
)
3398 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3400 ti
.scope
= FROB_CONTEXT (context
);
3402 ti
.template_id
= fullname
;
3403 ti
.enum_p
= tag_type
== enum_type
;
3404 ti
.class_p
= (tag_type
== class_type
3405 || tag_type
== record_type
3406 || tag_type
== union_type
);
3407 hash
= (htab_hash_pointer (ti
.scope
)
3408 ^ htab_hash_pointer (ti
.name
));
3410 /* See if we already have this type. */
3411 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3416 /* Build the TYPENAME_TYPE. */
3417 t
= cxx_make_type (TYPENAME_TYPE
);
3418 TYPE_CONTEXT (t
) = ti
.scope
;
3419 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3420 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3421 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3423 /* Build the corresponding TYPE_DECL. */
3424 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3425 TYPE_NAME (TREE_TYPE (d
)) = d
;
3426 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3427 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3428 DECL_ARTIFICIAL (d
) = 1;
3430 /* Store it in the hash table. */
3433 /* TYPENAME_TYPEs must always be compared structurally, because
3434 they may or may not resolve down to another type depending on
3435 the currently open classes. */
3436 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3442 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3443 provided to name the type. Returns an appropriate type, unless an
3444 error occurs, in which case error_mark_node is returned. If we
3445 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3446 return that, rather than the _TYPE it corresponds to, in other
3447 cases we look through the type decl. If TF_ERROR is set, complain
3448 about errors, otherwise be quiet. */
3451 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3452 tsubst_flags_t complain
)
3458 if (name
== error_mark_node
3459 || context
== NULL_TREE
3460 || context
== error_mark_node
)
3461 return error_mark_node
;
3465 if (!(TYPE_LANG_SPECIFIC (name
)
3466 && (CLASSTYPE_IS_TEMPLATE (name
)
3467 || CLASSTYPE_USE_TEMPLATE (name
))))
3468 name
= TYPE_IDENTIFIER (name
);
3470 /* Create a TEMPLATE_ID_EXPR for the type. */
3471 name
= build_nt (TEMPLATE_ID_EXPR
,
3472 CLASSTYPE_TI_TEMPLATE (name
),
3473 CLASSTYPE_TI_ARGS (name
));
3475 else if (TREE_CODE (name
) == TYPE_DECL
)
3476 name
= DECL_NAME (name
);
3480 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3482 name
= TREE_OPERAND (name
, 0);
3483 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3484 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3485 else if (TREE_CODE (name
) == OVERLOAD
)
3487 if (complain
& tf_error
)
3488 error ("%qD is not a type", name
);
3489 return error_mark_node
;
3492 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3494 if (complain
& tf_error
)
3495 error ("%qD used without template parameters", name
);
3496 return error_mark_node
;
3498 gcc_assert (identifier_p (name
));
3499 gcc_assert (TYPE_P (context
));
3501 if (!MAYBE_CLASS_TYPE_P (context
))
3503 if (complain
& tf_error
)
3504 error ("%q#T is not a class", context
);
3505 return error_mark_node
;
3508 /* When the CONTEXT is a dependent type, NAME could refer to a
3509 dependent base class of CONTEXT. But look inside it anyway
3510 if CONTEXT is a currently open scope, in case it refers to a
3511 member of the current instantiation or a non-dependent base;
3512 lookup will stop when we hit a dependent base. */
3513 if (!dependent_scope_p (context
))
3514 /* We should only set WANT_TYPE when we're a nested typename type.
3515 Then we can give better diagnostics if we find a non-type. */
3516 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3520 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3521 return build_typename_type (context
, name
, fullname
, tag_type
);
3523 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3527 if (complain
& tf_error
)
3528 error (want_template
? G_("no class template named %q#T in %q#T")
3529 : G_("no type named %q#T in %q#T"), name
, context
);
3530 return error_mark_node
;
3533 /* Pull out the template from an injected-class-name (or multiple). */
3535 t
= maybe_get_template_decl_from_type_decl (t
);
3537 if (TREE_CODE (t
) == TREE_LIST
)
3539 if (complain
& tf_error
)
3541 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3542 print_candidates (t
);
3544 return error_mark_node
;
3547 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3549 if (complain
& tf_error
)
3550 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3552 return error_mark_node
;
3554 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3556 if (complain
& tf_error
)
3557 error ("%<typename %T::%D%> names %q#T, which is not a type",
3559 return error_mark_node
;
3562 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3563 return error_mark_node
;
3565 /* If we are currently parsing a template and if T is a typedef accessed
3566 through CONTEXT then we need to remember and check access of T at
3567 template instantiation time. */
3568 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3571 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3573 /*entering_scope=*/0,
3574 complain
| tf_user
);
3576 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3579 maybe_record_typedef_use (t
);
3584 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3585 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3586 in which case error_mark_node is returned.
3588 If PARM_LIST is non-NULL, also make sure that the template parameter
3589 list of TEMPLATE_DECL matches.
3591 If COMPLAIN zero, don't complain about any errors that occur. */
3594 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3595 tsubst_flags_t complain
)
3601 name
= TYPE_IDENTIFIER (name
);
3602 else if (DECL_P (name
))
3603 name
= DECL_NAME (name
);
3604 gcc_assert (identifier_p (name
));
3606 if (!dependent_type_p (context
)
3607 || currently_open_class (context
))
3609 tree tmpl
= NULL_TREE
;
3611 if (MAYBE_CLASS_TYPE_P (context
))
3612 tmpl
= lookup_field (context
, name
, 0, false);
3614 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3615 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3617 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3619 if (complain
& tf_error
)
3620 error ("no class template named %q#T in %q#T", name
, context
);
3621 return error_mark_node
;
3625 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3627 if (complain
& tf_error
)
3629 error ("template parameters do not match template %qD", tmpl
);
3630 inform (DECL_SOURCE_LOCATION (tmpl
),
3631 "%qD declared here", tmpl
);
3633 return error_mark_node
;
3636 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3638 return error_mark_node
;
3643 /* Build the UNBOUND_CLASS_TEMPLATE. */
3644 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3645 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3646 TREE_TYPE (t
) = NULL_TREE
;
3647 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3649 /* Build the corresponding TEMPLATE_DECL. */
3650 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3651 TYPE_NAME (TREE_TYPE (d
)) = d
;
3652 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3653 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3654 DECL_ARTIFICIAL (d
) = 1;
3655 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3662 /* Push the declarations of builtin types into the namespace.
3663 RID_INDEX is the index of the builtin type in the array
3664 RID_POINTERS. NAME is the name used when looking up the builtin
3665 type. TYPE is the _TYPE node for the builtin type. */
3668 record_builtin_type (enum rid rid_index
,
3672 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3673 tree tdecl
= NULL_TREE
;
3675 if ((int) rid_index
< (int) RID_MAX
)
3676 rname
= ridpointers
[(int) rid_index
];
3678 tname
= get_identifier (name
);
3680 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3681 eliminated. Built-in types should not be looked up name; their
3682 names are keywords that the parser can recognize. However, there
3683 is code in c-common.c that uses identifier_global_value to look
3684 up built-in types by name. */
3687 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3688 DECL_ARTIFICIAL (tdecl
) = 1;
3689 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3695 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3696 DECL_ARTIFICIAL (tdecl
) = 1;
3698 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3701 if (!TYPE_NAME (type
))
3702 TYPE_NAME (type
) = tdecl
;
3705 debug_hooks
->type_decl (tdecl
, 0);
3708 /* Record one of the standard Java types.
3709 * Declare it as having the given NAME.
3710 * If SIZE > 0, it is the size of one of the integral types;
3711 * otherwise it is the negative of the size of one of the other types. */
3714 record_builtin_java_type (const char* name
, int size
)
3719 type
= build_nonstandard_integer_type (size
, 0);
3720 type
= build_distinct_type_copy (type
);
3722 else if (size
> -32)
3725 /* "__java_char" or ""__java_boolean". */
3726 type
= build_nonstandard_integer_type (-size
, 1);
3727 type
= build_distinct_type_copy (type
);
3728 /* Get the signed type cached and attached to the unsigned type,
3729 so it doesn't get garbage-collected at "random" times,
3730 causing potential codegen differences out of different UIDs
3731 and different alias set numbers. */
3732 stype
= build_nonstandard_integer_type (-size
, 0);
3733 stype
= build_distinct_type_copy (stype
);
3734 TREE_CHAIN (type
) = stype
;
3735 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3738 { /* "__java_float" or ""__java_double". */
3739 type
= make_node (REAL_TYPE
);
3740 TYPE_PRECISION (type
) = - size
;
3743 record_builtin_type (RID_MAX
, name
, type
);
3744 decl
= TYPE_NAME (type
);
3746 /* Suppress generate debug symbol entries for these types,
3747 since for normal C++ they are just clutter.
3748 However, push_lang_context undoes this if extern "Java" is seen. */
3749 DECL_IGNORED_P (decl
) = 1;
3751 TYPE_FOR_JAVA (type
) = 1;
3755 /* Push a type into the namespace so that the back ends ignore it. */
3758 record_unknown_type (tree type
, const char* name
)
3760 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3761 TYPE_DECL
, get_identifier (name
), type
));
3762 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3763 DECL_IGNORED_P (decl
) = 1;
3764 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3765 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3766 TYPE_ALIGN (type
) = 1;
3767 TYPE_USER_ALIGN (type
) = 0;
3768 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3771 /* A string for which we should create an IDENTIFIER_NODE at
3774 typedef struct predefined_identifier
3776 /* The name of the identifier. */
3777 const char *const name
;
3778 /* The place where the IDENTIFIER_NODE should be stored. */
3780 /* Nonzero if this is the name of a constructor or destructor. */
3781 const int ctor_or_dtor_p
;
3782 } predefined_identifier
;
3784 /* Create all the predefined identifiers. */
3787 initialize_predefined_identifiers (void)
3789 const predefined_identifier
*pid
;
3791 /* A table of identifiers to create at startup. */
3792 static const predefined_identifier predefined_identifiers
[] = {
3793 { "C++", &lang_name_cplusplus
, 0 },
3794 { "C", &lang_name_c
, 0 },
3795 { "Java", &lang_name_java
, 0 },
3796 /* Some of these names have a trailing space so that it is
3797 impossible for them to conflict with names written by users. */
3798 { "__ct ", &ctor_identifier
, 1 },
3799 { "__base_ctor ", &base_ctor_identifier
, 1 },
3800 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3801 { "__dt ", &dtor_identifier
, 1 },
3802 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3803 { "__base_dtor ", &base_dtor_identifier
, 1 },
3804 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3805 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3806 { "nelts", &nelts_identifier
, 0 },
3807 { THIS_NAME
, &this_identifier
, 0 },
3808 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3809 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3810 { "_vptr", &vptr_identifier
, 0 },
3811 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3812 { "::", &global_scope_name
, 0 },
3813 { "std", &std_identifier
, 0 },
3817 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3819 *pid
->node
= get_identifier (pid
->name
);
3820 if (pid
->ctor_or_dtor_p
)
3821 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3825 /* Create the predefined scalar types of C,
3826 and some nodes representing standard constants (0, 1, (void *)0).
3827 Initialize the global binding level.
3828 Make definitions for built-in primitive functions. */
3831 cxx_init_decl_processing (void)
3834 tree void_ftype_ptr
;
3836 /* Create all the identifiers we need. */
3837 initialize_predefined_identifiers ();
3839 /* Create the global variables. */
3840 push_to_top_level ();
3842 current_function_decl
= NULL_TREE
;
3843 current_binding_level
= NULL
;
3844 /* Enter the global namespace. */
3845 gcc_assert (global_namespace
== NULL_TREE
);
3846 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3848 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3849 TREE_PUBLIC (global_namespace
) = 1;
3850 begin_scope (sk_namespace
, global_namespace
);
3852 if (flag_visibility_ms_compat
)
3853 default_visibility
= VISIBILITY_HIDDEN
;
3856 current_lang_name
= lang_name_c
;
3858 /* Create the `std' namespace. */
3859 push_namespace (std_identifier
);
3860 std_node
= current_namespace
;
3863 c_common_nodes_and_builtins ();
3865 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3866 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3867 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3868 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3869 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3870 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3871 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3872 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3874 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3876 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3877 truthvalue_type_node
= boolean_type_node
;
3878 truthvalue_false_node
= boolean_false_node
;
3879 truthvalue_true_node
= boolean_true_node
;
3881 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3882 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3883 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3886 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3889 delta_type_node
= ptrdiff_type_node
;
3890 vtable_index_type
= ptrdiff_type_node
;
3892 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3893 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3894 void_ftype_ptr
= build_function_type_list (void_type_node
,
3895 ptr_type_node
, NULL_TREE
);
3897 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3899 /* C++ extensions */
3901 unknown_type_node
= make_node (LANG_TYPE
);
3902 record_unknown_type (unknown_type_node
, "unknown type");
3904 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3905 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3907 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3909 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3910 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3912 init_list_type_node
= make_node (LANG_TYPE
);
3913 record_unknown_type (init_list_type_node
, "init list");
3916 /* Make sure we get a unique function type, so we can give
3917 its pointer type a name. (This wins for gdb.) */
3918 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3919 TREE_TYPE (vfunc_type
) = integer_type_node
;
3920 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3921 layout_type (vfunc_type
);
3923 vtable_entry_type
= build_pointer_type (vfunc_type
);
3925 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3928 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3929 layout_type (vtbl_type_node
);
3930 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3931 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3932 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3933 layout_type (vtbl_ptr_type_node
);
3934 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3936 push_namespace (get_identifier ("__cxxabiv1"));
3937 abi_node
= current_namespace
;
3940 global_type_node
= make_node (LANG_TYPE
);
3941 record_unknown_type (global_type_node
, "global type");
3944 current_lang_name
= lang_name_cplusplus
;
3947 tree newattrs
, extvisattr
;
3948 tree newtype
, deltype
;
3949 tree ptr_ftype_sizetype
;
3953 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3954 if (cxx_dialect
== cxx98
)
3957 tree bad_alloc_type_node
;
3958 tree bad_alloc_decl
;
3960 push_namespace (std_identifier
);
3961 bad_alloc_id
= get_identifier ("bad_alloc");
3962 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3963 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3965 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3966 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3970 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3973 new_eh_spec
= noexcept_false_spec
;
3975 /* Ensure attribs.c is initialized. */
3977 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3979 newattrs
= tree_cons (get_identifier ("alloc_size"),
3980 build_tree_list (NULL_TREE
, integer_one_node
),
3982 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3983 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3984 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3985 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3986 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3987 DECL_IS_MALLOC (opnew
) = 1;
3988 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3989 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3990 DECL_IS_MALLOC (opnew
) = 1;
3991 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3992 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3993 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3994 if (flag_sized_deallocation
)
3996 /* Also push the sized deallocation variants:
3997 void operator delete(void*, std::size_t) throw();
3998 void operator delete[](void*, std::size_t) throw(); */
3999 tree void_ftype_ptr_size
4000 = build_function_type_list (void_type_node
, ptr_type_node
,
4001 size_type_node
, NULL_TREE
);
4002 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4004 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4005 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4006 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4009 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4010 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4011 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4012 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4013 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4014 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4015 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4016 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4020 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4021 ECF_NORETURN
| ECF_NOTHROW
);
4023 /* Perform other language dependent initializations. */
4024 init_class_processing ();
4025 init_rtti_processing ();
4026 init_template_processing ();
4028 if (flag_exceptions
)
4029 init_exception_processing ();
4031 if (! supports_one_only ())
4034 make_fname_decl
= cp_make_fname_decl
;
4035 start_fname_decls ();
4037 /* Show we use EH for cleanups. */
4038 if (flag_exceptions
)
4039 using_eh_for_cleanups ();
4042 /* Generate an initializer for a function naming variable from
4043 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4044 filled in with the type of the init. */
4047 cp_fname_init (const char* name
, tree
*type_p
)
4049 tree domain
= NULL_TREE
;
4051 tree init
= NULL_TREE
;
4056 length
= strlen (name
);
4057 domain
= build_index_type (size_int (length
));
4058 init
= build_string (length
+ 1, name
);
4061 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4062 type
= build_cplus_array_type (type
, domain
);
4067 TREE_TYPE (init
) = type
;
4069 init
= error_mark_node
;
4074 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4075 the decl, LOC is the location to give the decl, NAME is the
4076 initialization string and TYPE_DEP indicates whether NAME depended
4077 on the type of the function. We make use of that to detect
4078 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4079 at the point of first use, so we mustn't push the decl now. */
4082 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4084 const char *const name
= (type_dep
&& processing_template_decl
4085 ? NULL
: fname_as_string (type_dep
));
4087 tree init
= cp_fname_init (name
, &type
);
4088 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4091 free (CONST_CAST (char *, name
));
4093 /* As we're using pushdecl_with_scope, we must set the context. */
4094 DECL_CONTEXT (decl
) = current_function_decl
;
4096 TREE_STATIC (decl
) = 1;
4097 TREE_READONLY (decl
) = 1;
4098 DECL_ARTIFICIAL (decl
) = 1;
4100 TREE_USED (decl
) = 1;
4102 if (current_function_decl
)
4104 cp_binding_level
*b
= current_binding_level
;
4105 if (b
->kind
== sk_function_parms
)
4106 return error_mark_node
;
4107 while (b
->level_chain
->kind
!= sk_function_parms
)
4109 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4110 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4111 LOOKUP_ONLYCONVERTING
);
4115 DECL_THIS_STATIC (decl
) = true;
4116 pushdecl_top_level_and_finish (decl
, init
);
4123 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4125 tree id
= DECL_NAME (decl
);
4126 const char *name
= IDENTIFIER_POINTER (id
);
4128 retrofit_lang_decl (decl
);
4130 DECL_ARTIFICIAL (decl
) = 1;
4131 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4132 SET_DECL_LANGUAGE (decl
, lang_c
);
4133 /* Runtime library routines are, by definition, available in an
4134 external shared object. */
4135 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4136 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4138 DECL_CONTEXT (decl
) = context
;
4141 pushdecl_top_level (decl
);
4145 /* A function in the user's namespace should have an explicit
4146 declaration before it is used. Mark the built-in function as
4147 anticipated but not actually declared. */
4148 if (name
[0] != '_' || name
[1] != '_')
4149 DECL_ANTICIPATED (decl
) = 1;
4150 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4152 size_t len
= strlen (name
);
4154 /* Treat __*_chk fortification functions as anticipated as well,
4155 unless they are __builtin_*. */
4156 if (len
> strlen ("___chk")
4157 && memcmp (name
+ len
- strlen ("_chk"),
4158 "_chk", strlen ("_chk") + 1) == 0)
4159 DECL_ANTICIPATED (decl
) = 1;
4166 cxx_builtin_function (tree decl
)
4168 tree id
= DECL_NAME (decl
);
4169 const char *name
= IDENTIFIER_POINTER (id
);
4170 /* All builtins that don't begin with an '_' should additionally
4171 go in the 'std' namespace. */
4174 tree decl2
= copy_node(decl
);
4175 push_namespace (std_identifier
);
4176 builtin_function_1 (decl2
, std_node
, false);
4180 return builtin_function_1 (decl
, NULL_TREE
, false);
4183 /* Like cxx_builtin_function, but guarantee the function is added to the global
4184 scope. This is to allow function specific options to add new machine
4185 dependent builtins when the target ISA changes via attribute((target(...)))
4186 which saves space on program startup if the program does not use non-generic
4190 cxx_builtin_function_ext_scope (tree decl
)
4193 tree id
= DECL_NAME (decl
);
4194 const char *name
= IDENTIFIER_POINTER (id
);
4195 /* All builtins that don't begin with an '_' should additionally
4196 go in the 'std' namespace. */
4199 tree decl2
= copy_node(decl
);
4200 push_namespace (std_identifier
);
4201 builtin_function_1 (decl2
, std_node
, true);
4205 return builtin_function_1 (decl
, NULL_TREE
, true);
4208 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4209 function. Not called directly. */
4212 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4215 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4216 DECL_EXTERNAL (fn
) = 1;
4217 TREE_PUBLIC (fn
) = 1;
4218 DECL_ARTIFICIAL (fn
) = 1;
4219 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4220 SET_DECL_LANGUAGE (fn
, lang_c
);
4221 /* Runtime library routines are, by definition, available in an
4222 external shared object. */
4223 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4224 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4225 set_call_expr_flags (fn
, ecf_flags
);
4229 /* Returns the _DECL for a library function with C++ linkage. */
4232 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4235 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4236 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4237 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4241 /* Like build_library_fn, but takes a C string instead of an
4245 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4247 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4250 /* Like build_cp_library_fn, but takes a C string instead of an
4254 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4256 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4260 /* Like build_library_fn, but also pushes the function so that we will
4261 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4262 may throw exceptions listed in RAISES. */
4265 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4270 type
= build_exception_variant (type
, raises
);
4272 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4273 pushdecl_top_level (fn
);
4277 /* Like build_cp_library_fn, but also pushes the function so that it
4278 will be found by normal lookup. */
4281 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4284 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4289 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4293 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4297 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4299 tree type
= build_function_type (void_type_node
, parmtypes
);
4300 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4303 /* Like push_library_fn, but also note that this function throws
4304 and does not return. Used for __throw_foo and the like. */
4307 push_throw_library_fn (tree name
, tree type
)
4309 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4313 /* When we call finish_struct for an anonymous union, we create
4314 default copy constructors and such. But, an anonymous union
4315 shouldn't have such things; this function undoes the damage to the
4316 anonymous union type T.
4318 (The reason that we create the synthesized methods is that we don't
4319 distinguish `union { int i; }' from `typedef union { int i; } U'.
4320 The first is an anonymous union; the second is just an ordinary
4324 fixup_anonymous_aggr (tree t
)
4328 /* Wipe out memory of synthesized methods. */
4329 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4330 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4331 TYPE_HAS_COPY_CTOR (t
) = 0;
4332 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4333 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4334 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4336 /* Splice the implicitly generated functions out of the TYPE_METHODS
4338 q
= &TYPE_METHODS (t
);
4341 if (DECL_ARTIFICIAL (*q
))
4342 *q
= TREE_CHAIN (*q
);
4344 q
= &DECL_CHAIN (*q
);
4347 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4348 if (TYPE_METHODS (t
))
4350 tree decl
= TYPE_MAIN_DECL (t
);
4352 if (TREE_CODE (t
) != UNION_TYPE
)
4353 error_at (DECL_SOURCE_LOCATION (decl
),
4354 "an anonymous struct cannot have function members");
4356 error_at (DECL_SOURCE_LOCATION (decl
),
4357 "an anonymous union cannot have function members");
4360 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4361 assignment operators (because they cannot have these methods themselves).
4362 For anonymous unions this is already checked because they are not allowed
4363 in any union, otherwise we have to check it. */
4364 if (TREE_CODE (t
) != UNION_TYPE
)
4368 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4369 if (TREE_CODE (field
) == FIELD_DECL
)
4371 type
= TREE_TYPE (field
);
4372 if (CLASS_TYPE_P (type
))
4374 if (TYPE_NEEDS_CONSTRUCTING (type
))
4375 error ("member %q+#D with constructor not allowed "
4376 "in anonymous aggregate", field
);
4377 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4378 error ("member %q+#D with destructor not allowed "
4379 "in anonymous aggregate", field
);
4380 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4381 error ("member %q+#D with copy assignment operator "
4382 "not allowed in anonymous aggregate", field
);
4388 /* Warn for an attribute located at LOCATION that appertains to the
4389 class type CLASS_TYPE that has not been properly placed after its
4390 class-key, in it class-specifier. */
4393 warn_misplaced_attr_for_class_type (source_location location
,
4396 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4398 if (warning_at (location
, OPT_Wattributes
,
4399 "attribute ignored in declaration "
4400 "of %q#T", class_type
))
4402 "attribute for %q#T must follow the %qs keyword",
4403 class_type
, class_key_or_enum_as_string (class_type
));
4406 /* Make sure that a declaration with no declarator is well-formed, i.e.
4407 just declares a tagged type or anonymous union.
4409 Returns the type declared; or NULL_TREE if none. */
4412 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4413 bool explicit_type_instantiation_p
)
4415 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4416 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4417 /* If a class, struct, or enum type is declared by the DECLSPECS
4418 (i.e, if a class-specifier, enum-specifier, or non-typename
4419 elaborated-type-specifier appears in the DECLSPECS),
4420 DECLARED_TYPE is set to the corresponding type. */
4421 tree declared_type
= NULL_TREE
;
4422 bool error_p
= false;
4424 if (declspecs
->multiple_types_p
)
4425 error ("multiple types in one declaration");
4426 else if (declspecs
->redefined_builtin_type
)
4428 if (!in_system_header_at (input_location
))
4429 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4430 "redeclaration of C++ built-in type %qT",
4431 declspecs
->redefined_builtin_type
);
4436 && TYPE_P (declspecs
->type
)
4437 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4438 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4439 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4440 declared_type
= declspecs
->type
;
4441 else if (declspecs
->type
== error_mark_node
)
4443 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4444 permerror (input_location
, "declaration does not declare anything");
4445 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4447 error ("%<auto%> can only be specified for variables "
4448 "or function declarations");
4449 return error_mark_node
;
4451 /* Check for an anonymous union. */
4452 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4453 && TYPE_ANONYMOUS_P (declared_type
))
4455 /* 7/3 In a simple-declaration, the optional init-declarator-list
4456 can be omitted only when declaring a class (clause 9) or
4457 enumeration (7.2), that is, when the decl-specifier-seq contains
4458 either a class-specifier, an elaborated-type-specifier with
4459 a class-key (9.1), or an enum-specifier. In these cases and
4460 whenever a class-specifier or enum-specifier is present in the
4461 decl-specifier-seq, the identifiers in these specifiers are among
4462 the names being declared by the declaration (as class-name,
4463 enum-names, or enumerators, depending on the syntax). In such
4464 cases, and except for the declaration of an unnamed bit-field (9.6),
4465 the decl-specifier-seq shall introduce one or more names into the
4466 program, or shall redeclare a name introduced by a previous
4467 declaration. [Example:
4468 enum { }; // ill-formed
4469 typedef class { }; // ill-formed
4473 error ("missing type-name in typedef-declaration");
4476 /* Anonymous unions are objects, so they can have specifiers. */;
4477 SET_ANON_AGGR_TYPE_P (declared_type
);
4479 if (TREE_CODE (declared_type
) != UNION_TYPE
4480 && !in_system_header_at (input_location
))
4481 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4486 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4487 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4488 error ("%qs can only be specified for functions",
4489 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4490 ? "inline" : "virtual");
4492 && (!current_class_type
4493 || current_scope () != current_class_type
))
4494 error ("%<friend%> can only be specified inside a class");
4495 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4496 error ("%<explicit%> can only be specified for constructors");
4497 else if (declspecs
->storage_class
)
4498 error ("a storage class can only be specified for objects "
4500 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4501 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4502 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4503 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4504 error ("qualifiers can only be specified for objects "
4506 else if (saw_typedef
)
4507 warning (0, "%<typedef%> was ignored in this declaration");
4508 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4509 error ("%<constexpr%> cannot be used for type declarations");
4512 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4515 if (!CLASS_TYPE_P (declared_type
)
4516 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4517 /* For a non-template class, use the name location. */
4518 loc
= location_of (declared_type
);
4520 /* For a template class (an explicit instantiation), use the
4521 current location. */
4522 loc
= input_location
;
4524 if (explicit_type_instantiation_p
)
4525 /* [dcl.attr.grammar]/4:
4527 No attribute-specifier-seq shall appertain to an explicit
4530 if (warning_at (loc
, OPT_Wattributes
,
4531 "attribute ignored in explicit instantiation %q#T",
4534 "no attribute can be applied to "
4535 "an explicit instantiation");
4538 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4541 return declared_type
;
4544 /* Called when a declaration is seen that contains no names to declare.
4545 If its type is a reference to a structure, union or enum inherited
4546 from a containing scope, shadow that tag name for the current scope
4547 with a forward reference.
4548 If its type defines a new named structure or union
4549 or defines an enum, it is valid but we need not do anything here.
4550 Otherwise, it is an error.
4552 C++: may have to grok the declspecs to learn about static,
4553 complain for anonymous unions.
4555 Returns the TYPE declared -- or NULL_TREE if none. */
4558 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4560 tree t
= check_tag_decl (declspecs
,
4561 /*explicit_type_instantiation_p=*/false);
4566 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4569 /* This is where the variables in an anonymous union are
4570 declared. An anonymous union declaration looks like:
4572 because there is no declarator after the union, the parser
4573 sends that declaration here. */
4574 if (ANON_AGGR_TYPE_P (t
))
4576 fixup_anonymous_aggr (t
);
4578 if (TYPE_FIELDS (t
))
4580 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4581 declspecs
, NORMAL
, 0, NULL
);
4582 finish_anon_union (decl
);
4589 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4592 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4593 const cp_declarator
*declarator
,
4594 bool is_template_arg
)
4598 enum decl_context context
4599 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4600 attrs
= type_specifiers
->attributes
;
4601 type_specifiers
->attributes
= NULL_TREE
;
4602 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4603 if (attrs
&& type
!= error_mark_node
)
4605 if (CLASS_TYPE_P (type
))
4606 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4607 "outside of definition", type
);
4608 else if (MAYBE_CLASS_TYPE_P (type
))
4609 /* A template type parameter or other dependent type. */
4610 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4611 "type %qT without an associated declaration", type
);
4613 cplus_decl_attributes (&type
, attrs
, 0);
4618 /* Process a DECLARATOR for a function-scope variable declaration,
4619 namespace-scope variable declaration, or function declaration.
4620 (Function definitions go through start_function; class member
4621 declarations appearing in the body of the class go through
4622 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4623 If an error occurs, the error_mark_node is returned instead.
4625 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4626 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4627 for an explicitly defaulted function, or SD_DELETED for an explicitly
4628 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4629 implicitly initialized via a default constructor. ATTRIBUTES and
4630 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4632 The scope represented by the context of the returned DECL is pushed
4633 (if it is not the global namespace) and is assigned to
4634 *PUSHED_SCOPE_P. The caller is then responsible for calling
4635 pop_scope on *PUSHED_SCOPE_P if it is set. */
4638 start_decl (const cp_declarator
*declarator
,
4639 cp_decl_specifier_seq
*declspecs
,
4642 tree prefix_attributes
,
4643 tree
*pushed_scope_p
)
4651 *pushed_scope_p
= NULL_TREE
;
4653 /* An object declared as __attribute__((deprecated)) suppresses
4654 warnings of uses of other deprecated items. */
4655 if (lookup_attribute ("deprecated", attributes
))
4656 deprecated_state
= DEPRECATED_SUPPRESS
;
4658 attributes
= chainon (attributes
, prefix_attributes
);
4660 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4663 deprecated_state
= DEPRECATED_NORMAL
;
4665 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4666 || decl
== error_mark_node
)
4667 return error_mark_node
;
4669 context
= CP_DECL_CONTEXT (decl
);
4670 if (context
!= global_namespace
)
4671 *pushed_scope_p
= push_scope (context
);
4673 /* Is it valid for this decl to have an initializer at all?
4674 If not, set INITIALIZED to zero, which will indirectly
4675 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4677 && TREE_CODE (decl
) == TYPE_DECL
)
4679 error ("typedef %qD is initialized (use decltype instead)", decl
);
4680 return error_mark_node
;
4685 if (! toplevel_bindings_p ()
4686 && DECL_EXTERNAL (decl
))
4687 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4689 DECL_EXTERNAL (decl
) = 0;
4690 if (toplevel_bindings_p ())
4691 TREE_STATIC (decl
) = 1;
4693 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4695 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4696 record_key_method_defined (decl
);
4698 /* If this is a typedef that names the class for linkage purposes
4699 (7.1.3p8), apply any attributes directly to the type. */
4700 if (TREE_CODE (decl
) == TYPE_DECL
4701 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4702 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4703 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4707 /* Set attributes here so if duplicate decl, will have proper attributes. */
4708 cplus_decl_attributes (&decl
, attributes
, flags
);
4710 /* Dllimported symbols cannot be defined. Static data members (which
4711 can be initialized in-class and dllimported) go through grokfield,
4712 not here, so we don't need to exclude those decls when checking for
4714 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4716 error ("definition of %q#D is marked %<dllimport%>", decl
);
4717 DECL_DLLIMPORT_P (decl
) = 0;
4720 /* If #pragma weak was used, mark the decl weak now. */
4721 if (!processing_template_decl
)
4722 maybe_apply_pragma_weak (decl
);
4724 if (TREE_CODE (decl
) == FUNCTION_DECL
4725 && DECL_DECLARED_INLINE_P (decl
)
4726 && DECL_UNINLINABLE (decl
)
4727 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4728 warning (0, "inline function %q+D given attribute noinline", decl
);
4730 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4732 bool this_tmpl
= (processing_template_decl
4733 > template_class_depth (context
));
4736 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4737 if (field
== NULL_TREE
4738 || !(VAR_P (field
) || variable_template_p (field
)))
4739 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4740 else if (variable_template_p (field
) && !this_tmpl
)
4742 if (DECL_LANG_SPECIFIC (decl
)
4743 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4744 /* OK, specialization was already checked. */;
4747 error_at (DECL_SOURCE_LOCATION (decl
),
4748 "non-member-template declaration of %qD", decl
);
4749 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4750 "member template declaration here");
4751 return error_mark_node
;
4756 if (variable_template_p (field
))
4757 field
= DECL_TEMPLATE_RESULT (field
);
4759 if (DECL_CONTEXT (field
) != context
)
4761 if (!same_type_p (DECL_CONTEXT (field
), context
))
4762 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4763 "to be defined as %<%T::%D%>",
4764 DECL_CONTEXT (field
), DECL_NAME (decl
),
4765 context
, DECL_NAME (decl
));
4766 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4768 /* Static data member are tricky; an in-class initialization
4769 still doesn't provide a definition, so the in-class
4770 declaration will have DECL_EXTERNAL set, but will have an
4771 initialization. Thus, duplicate_decls won't warn
4772 about this situation, and so we check here. */
4773 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4774 error ("duplicate initialization of %qD", decl
);
4775 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4777 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4778 && !DECL_DECLARED_CONSTEXPR_P (field
))
4779 error ("%qD declared %<constexpr%> outside its class", field
);
4784 tree field
= check_classfn (context
, decl
,
4786 ? current_template_parms
4788 if (field
&& field
!= error_mark_node
4789 && duplicate_decls (decl
, field
,
4790 /*newdecl_is_friend=*/false))
4794 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4795 DECL_IN_AGGR_P (decl
) = 0;
4796 /* Do not mark DECL as an explicit specialization if it was not
4797 already marked as an instantiation; a declaration should
4798 never be marked as a specialization unless we know what
4799 template is being specialized. */
4800 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4802 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4803 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4804 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4805 && DECL_DECLARED_INLINE_P (decl
));
4807 DECL_COMDAT (decl
) = false;
4809 /* [temp.expl.spec] An explicit specialization of a static data
4810 member of a template is a definition if the declaration
4811 includes an initializer; otherwise, it is a declaration.
4813 We check for processing_specialization so this only applies
4814 to the new specialization syntax. */
4815 if (!initialized
&& processing_specialization
)
4816 DECL_EXTERNAL (decl
) = 1;
4819 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4820 /* Aliases are definitions. */
4822 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4826 was_public
= TREE_PUBLIC (decl
);
4828 /* Enter this declaration into the symbol table. */
4829 decl
= maybe_push_decl (decl
);
4831 if (processing_template_decl
)
4832 decl
= push_template_decl (decl
);
4833 if (decl
== error_mark_node
)
4834 return error_mark_node
;
4837 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4838 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4840 /* This is a const variable with implicit 'static'. Set
4841 DECL_THIS_STATIC so we can tell it from variables that are
4842 !TREE_PUBLIC because of the anonymous namespace. */
4843 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4844 DECL_THIS_STATIC (decl
) = 1;
4847 if (current_function_decl
&& VAR_P (decl
)
4848 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4851 if (DECL_THREAD_LOCAL_P (decl
))
4852 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4854 else if (TREE_STATIC (decl
))
4855 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4859 cp_function_chain
->invalid_constexpr
= true;
4862 if (!processing_template_decl
&& VAR_P (decl
))
4863 start_decl_1 (decl
, initialized
);
4868 /* Process the declaration of a variable DECL. INITIALIZED is true
4869 iff DECL is explicitly initialized. (INITIALIZED is false if the
4870 variable is initialized via an implicitly-called constructor.)
4871 This function must be called for ordinary variables (including, for
4872 example, implicit instantiations of templates), but must not be
4873 called for template declarations. */
4876 start_decl_1 (tree decl
, bool initialized
)
4880 bool aggregate_definition_p
;
4882 gcc_assert (!processing_template_decl
);
4884 if (error_operand_p (decl
))
4887 gcc_assert (VAR_P (decl
));
4889 type
= TREE_TYPE (decl
);
4890 complete_p
= COMPLETE_TYPE_P (type
);
4891 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4893 /* If an explicit initializer is present, or if this is a definition
4894 of an aggregate, then we need a complete type at this point.
4895 (Scalars are always complete types, so there is nothing to
4896 check.) This code just sets COMPLETE_P; errors (if necessary)
4897 are issued below. */
4898 if ((initialized
|| aggregate_definition_p
)
4900 && COMPLETE_TYPE_P (complete_type (type
)))
4903 /* We will not yet have set TREE_READONLY on DECL if the type
4904 was "const", but incomplete, before this point. But, now, we
4905 have a complete type, so we can try again. */
4906 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4910 /* Is it valid for this decl to have an initializer at all? */
4912 /* Don't allow initializations for incomplete types except for
4913 arrays which might be completed by the initialization. */
4915 ; /* A complete type is ok. */
4916 else if (type_uses_auto (type
))
4917 ; /* An auto type is ok. */
4918 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4920 error ("variable %q#D has initializer but incomplete type", decl
);
4921 type
= TREE_TYPE (decl
) = error_mark_node
;
4923 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4925 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4926 error ("elements of array %q#D have incomplete type", decl
);
4927 /* else we already gave an error in start_decl. */
4930 else if (aggregate_definition_p
&& !complete_p
)
4932 if (type_uses_auto (type
))
4933 error ("declaration of %q#D has no initializer", decl
);
4935 error ("aggregate %q#D has incomplete type and cannot be defined",
4937 /* Change the type so that assemble_variable will give
4938 DECL an rtl we can live with: (mem (const_int 0)). */
4939 type
= TREE_TYPE (decl
) = error_mark_node
;
4942 /* Create a new scope to hold this declaration if necessary.
4943 Whether or not a new scope is necessary cannot be determined
4944 until after the type has been completed; if the type is a
4945 specialization of a class template it is not until after
4946 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4947 will be set correctly. */
4948 maybe_push_cleanup_level (type
);
4951 /* Handle initialization of references. DECL, TYPE, and INIT have the
4952 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4953 but will be set to a new CLEANUP_STMT if a temporary is created
4954 that must be destroyed subsequently.
4956 Returns an initializer expression to use to initialize DECL, or
4957 NULL if the initialization can be performed statically.
4959 Quotes on semantics can be found in ARM 8.4.3. */
4962 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4964 if (init
== NULL_TREE
)
4966 if ((DECL_LANG_SPECIFIC (decl
) == 0
4967 || DECL_IN_AGGR_P (decl
) == 0)
4968 && ! DECL_THIS_EXTERN (decl
))
4969 error ("%qD declared as reference but not initialized", decl
);
4973 if (TREE_CODE (init
) == TREE_LIST
)
4974 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4975 tf_warning_or_error
);
4977 tree ttype
= TREE_TYPE (type
);
4978 if (TREE_CODE (ttype
) != ARRAY_TYPE
4979 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4980 /* Note: default conversion is only called in very special cases. */
4981 init
= decay_conversion (init
, tf_warning_or_error
);
4983 /* check_initializer handles this for non-reference variables, but for
4984 references we need to do it here or the initializer will get the
4985 incomplete array type and confuse later calls to
4986 cp_complete_array_type. */
4987 if (TREE_CODE (ttype
) == ARRAY_TYPE
4988 && TYPE_DOMAIN (ttype
) == NULL_TREE
4989 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
4990 || TREE_CODE (init
) == STRING_CST
))
4992 cp_complete_array_type (&ttype
, init
, false);
4993 if (ttype
!= TREE_TYPE (type
))
4994 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
4997 /* Convert INIT to the reference type TYPE. This may involve the
4998 creation of a temporary, whose lifetime must be the same as that
4999 of the reference. If so, a DECL_EXPR for the temporary will be
5000 added just after the DECL_EXPR for DECL. That's why we don't set
5001 DECL_INITIAL for local references (instead assigning to them
5002 explicitly); we need to allow the temporary to be initialized
5004 return initialize_reference (type
, init
, flags
,
5005 tf_warning_or_error
);
5008 /* Designated initializers in arrays are not supported in GNU C++.
5009 The parser cannot detect this error since it does not know whether
5010 a given brace-enclosed initializer is for a class type or for an
5011 array. This function checks that CE does not use a designated
5012 initializer. If it does, an error is issued. Returns true if CE
5013 is valid, i.e., does not have a designated initializer. */
5016 check_array_designated_initializer (constructor_elt
*ce
,
5017 unsigned HOST_WIDE_INT index
)
5019 /* Designated initializers for array elements are not supported. */
5022 /* The parser only allows identifiers as designated
5024 if (ce
->index
== error_mark_node
)
5026 error ("name used in a GNU-style designated "
5027 "initializer for an array");
5030 else if (identifier_p (ce
->index
))
5032 error ("name %qD used in a GNU-style designated "
5033 "initializer for an array", ce
->index
);
5037 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5040 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5041 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5044 /* A C99 designator is OK if it matches the current index. */
5045 if (wi::eq_p (ce_index
, index
))
5048 sorry ("non-trivial designated initializers not supported");
5051 error ("C99 designator %qE is not an integral constant-expression",
5060 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5061 array until we finish parsing the initializer. If that's the
5062 situation we're in, update DECL accordingly. */
5065 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5067 tree type
= TREE_TYPE (decl
);
5069 if (TREE_CODE (type
) == ARRAY_TYPE
5070 && TYPE_DOMAIN (type
) == NULL_TREE
5071 && TREE_CODE (decl
) != TYPE_DECL
)
5073 /* do_default is really a C-ism to deal with tentative definitions.
5074 But let's leave it here to ease the eventual merge. */
5075 int do_default
= !DECL_EXTERNAL (decl
);
5076 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5079 /* Check that there are no designated initializers in INIT, as
5080 those are not supported in GNU C++, and as the middle-end
5081 will crash if presented with a non-numeric designated
5083 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5085 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5086 constructor_elt
*ce
;
5088 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5089 if (!check_array_designated_initializer (ce
, i
))
5095 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5099 error ("initializer fails to determine size of %qD", decl
);
5101 else if (failure
== 2)
5105 error ("array size missing in %qD", decl
);
5107 /* If a `static' var's size isn't known, make it extern as
5108 well as static, so it does not get allocated. If it's not
5109 `static', then don't mark it extern; finish_incomplete_decl
5110 will give it a default size and it will get allocated. */
5111 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5112 DECL_EXTERNAL (decl
) = 1;
5114 else if (failure
== 3)
5116 error ("zero-size array %qD", decl
);
5120 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5122 relayout_decl (decl
);
5126 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5127 any appropriate error messages regarding the layout. */
5130 layout_var_decl (tree decl
)
5134 type
= TREE_TYPE (decl
);
5135 if (type
== error_mark_node
)
5138 /* If we haven't already laid out this declaration, do so now.
5139 Note that we must not call complete type for an external object
5140 because it's type might involve templates that we are not
5141 supposed to instantiate yet. (And it's perfectly valid to say
5142 `extern X x' for some incomplete type `X'.) */
5143 if (!DECL_EXTERNAL (decl
))
5144 complete_type (type
);
5145 if (!DECL_SIZE (decl
)
5146 && TREE_TYPE (decl
) != error_mark_node
5147 && (COMPLETE_TYPE_P (type
)
5148 || (TREE_CODE (type
) == ARRAY_TYPE
5149 && !TYPE_DOMAIN (type
)
5150 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5151 layout_decl (decl
, 0);
5153 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5155 /* An automatic variable with an incomplete type: that is an error.
5156 Don't talk about array types here, since we took care of that
5157 message in grokdeclarator. */
5158 error ("storage size of %qD isn%'t known", decl
);
5159 TREE_TYPE (decl
) = error_mark_node
;
5162 /* Keep this code around in case we later want to control debug info
5163 based on whether a type is "used". (jason 1999-11-11) */
5165 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5166 /* Let debugger know it should output info for this type. */
5167 note_debug_info_needed (ttype
);
5169 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5170 note_debug_info_needed (DECL_CONTEXT (decl
));
5173 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5174 && DECL_SIZE (decl
) != NULL_TREE
5175 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5177 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5178 constant_expression_warning (DECL_SIZE (decl
));
5181 error ("storage size of %qD isn%'t constant", decl
);
5182 TREE_TYPE (decl
) = error_mark_node
;
5187 /* If a local static variable is declared in an inline function, or if
5188 we have a weak definition, we must endeavor to create only one
5189 instance of the variable at link-time. */
5192 maybe_commonize_var (tree decl
)
5194 /* Static data in a function with comdat linkage also has comdat
5196 if (TREE_STATIC (decl
)
5197 /* Don't mess with __FUNCTION__. */
5198 && ! DECL_ARTIFICIAL (decl
)
5199 && DECL_FUNCTION_SCOPE_P (decl
)
5200 && vague_linkage_p (DECL_CONTEXT (decl
)))
5204 /* With weak symbols, we simply make the variable COMDAT;
5205 that will cause copies in multiple translations units to
5207 comdat_linkage (decl
);
5211 if (DECL_INITIAL (decl
) == NULL_TREE
5212 || DECL_INITIAL (decl
) == error_mark_node
)
5214 /* Without weak symbols, we can use COMMON to merge
5215 uninitialized variables. */
5216 TREE_PUBLIC (decl
) = 1;
5217 DECL_COMMON (decl
) = 1;
5221 /* While for initialized variables, we must use internal
5222 linkage -- which means that multiple copies will not
5224 TREE_PUBLIC (decl
) = 0;
5225 DECL_COMMON (decl
) = 0;
5226 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5227 "sorry: semantics of inline function static "
5228 "data %q#D are wrong (you%'ll wind up "
5229 "with multiple copies)", decl
))
5230 inform (DECL_SOURCE_LOCATION (decl
),
5231 "you can work around this by removing the initializer");
5237 /* Issue an error message if DECL is an uninitialized const variable. */
5240 check_for_uninitialized_const_var (tree decl
)
5242 tree type
= strip_array_types (TREE_TYPE (decl
));
5244 /* ``Unless explicitly declared extern, a const object does not have
5245 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5248 && TREE_CODE (type
) != REFERENCE_TYPE
5249 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5250 && !DECL_INITIAL (decl
))
5252 tree field
= default_init_uninitialized_part (type
);
5256 if (CP_TYPE_CONST_P (type
))
5257 permerror (DECL_SOURCE_LOCATION (decl
),
5258 "uninitialized const %qD", decl
);
5261 error_at (DECL_SOURCE_LOCATION (decl
),
5262 "uninitialized variable %qD in %<constexpr%> function",
5264 cp_function_chain
->invalid_constexpr
= true;
5267 if (CLASS_TYPE_P (type
))
5269 tree defaulted_ctor
;
5271 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5272 "%q#T has no user-provided default constructor", type
);
5273 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5275 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5276 "constructor is not user-provided because it is "
5277 "explicitly defaulted in the class body");
5278 inform (0, "and the implicitly-defined constructor does not "
5279 "initialize %q+#D", field
);
5284 /* Structure holding the current initializer being processed by reshape_init.
5285 CUR is a pointer to the current element being processed, END is a pointer
5286 after the last element present in the initializer. */
5287 typedef struct reshape_iterator_t
5289 constructor_elt
*cur
;
5290 constructor_elt
*end
;
5293 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5295 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5296 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5297 initialized. If there are no more such fields, the return value
5301 next_initializable_field (tree field
)
5304 && (TREE_CODE (field
) != FIELD_DECL
5305 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5306 || DECL_ARTIFICIAL (field
)))
5307 field
= DECL_CHAIN (field
);
5312 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5313 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5314 INTEGER_CST representing the size of the array minus one (the maximum index),
5315 or NULL_TREE if the array was declared without specifying the size. D is
5316 the iterator within the constructor. */
5319 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5320 tsubst_flags_t complain
)
5323 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5324 unsigned HOST_WIDE_INT max_index_cst
= 0;
5325 unsigned HOST_WIDE_INT index
;
5327 /* The initializer for an array is always a CONSTRUCTOR. */
5328 new_init
= build_constructor (init_list_type_node
, NULL
);
5332 /* Minus 1 is used for zero sized arrays. */
5333 if (integer_all_onesp (max_index
))
5336 if (tree_fits_uhwi_p (max_index
))
5337 max_index_cst
= tree_to_uhwi (max_index
);
5338 /* sizetype is sign extended, not zero extended. */
5340 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5343 /* Loop until there are no more initializers. */
5345 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5349 constructor_elt
*old_cur
= d
->cur
;
5351 check_array_designated_initializer (d
->cur
, index
);
5352 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5354 if (elt_init
== error_mark_node
)
5355 return error_mark_node
;
5356 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5357 size_int (index
), elt_init
);
5358 if (!TREE_CONSTANT (elt_init
))
5359 TREE_CONSTANT (new_init
) = false;
5361 /* This can happen with an invalid initializer (c++/54501). */
5362 if (d
->cur
== old_cur
&& !sized_array_p
)
5369 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5370 Parameters are the same of reshape_init_r. */
5373 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5375 tree max_index
= NULL_TREE
;
5377 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5379 if (TYPE_DOMAIN (type
))
5380 max_index
= array_type_nelts (type
);
5382 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5385 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5386 Parameters are the same of reshape_init_r. */
5389 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5391 tree max_index
= NULL_TREE
;
5393 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5395 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5397 tree value
= d
->cur
->value
;
5398 if (!same_type_p (TREE_TYPE (value
), type
))
5400 if (complain
& tf_error
)
5401 error ("invalid type %qT as initializer for a vector of type %qT",
5402 TREE_TYPE (d
->cur
->value
), type
);
5403 value
= error_mark_node
;
5409 /* For a vector, we initialize it as an array of the appropriate size. */
5410 if (TREE_CODE (type
) == VECTOR_TYPE
)
5411 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5413 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5416 /* Subroutine of reshape_init_r, processes the initializers for classes
5417 or union. Parameters are the same of reshape_init_r. */
5420 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5421 tsubst_flags_t complain
)
5426 gcc_assert (CLASS_TYPE_P (type
));
5428 /* The initializer for a class is always a CONSTRUCTOR. */
5429 new_init
= build_constructor (init_list_type_node
, NULL
);
5430 field
= next_initializable_field (TYPE_FIELDS (type
));
5436 An initializer for an aggregate member that is an
5437 empty class shall have the form of an empty
5438 initializer-list {}. */
5439 if (!first_initializer_p
)
5441 if (complain
& tf_error
)
5442 error ("initializer for %qT must be brace-enclosed", type
);
5443 return error_mark_node
;
5448 /* Loop through the initializable fields, gathering initializers. */
5449 while (d
->cur
!= d
->end
)
5452 constructor_elt
*old_cur
= d
->cur
;
5454 /* Handle designated initializers, as an extension. */
5457 if (d
->cur
->index
== error_mark_node
)
5458 return error_mark_node
;
5460 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5461 /* We already reshaped this. */
5462 gcc_assert (d
->cur
->index
== field
);
5463 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5464 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5467 if (complain
& tf_error
)
5468 error ("%<[%E] =%> used in a GNU-style designated initializer"
5469 " for class %qT", d
->cur
->index
, type
);
5470 return error_mark_node
;
5473 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5475 if (complain
& tf_error
)
5476 error ("%qT has no non-static data member named %qD", type
,
5478 return error_mark_node
;
5482 /* If we processed all the member of the class, we are done. */
5486 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5487 /*first_initializer_p=*/false, complain
);
5488 if (field_init
== error_mark_node
)
5489 return error_mark_node
;
5491 if (d
->cur
== old_cur
&& d
->cur
->index
)
5493 /* This can happen with an invalid initializer for a flexible
5494 array member (c++/54441). */
5495 if (complain
& tf_error
)
5496 error ("invalid initializer for %q#D", field
);
5497 return error_mark_node
;
5500 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5504 When a union is initialized with a brace-enclosed
5505 initializer, the braces shall only contain an
5506 initializer for the first member of the union. */
5507 if (TREE_CODE (type
) == UNION_TYPE
)
5510 field
= next_initializable_field (DECL_CHAIN (field
));
5516 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5517 designators are not valid; either complain or return true to indicate
5518 that reshape_init_r should return error_mark_node. */
5521 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5525 if (complain
& tf_error
)
5526 error ("C99 designator %qE outside aggregate initializer",
5534 /* Subroutine of reshape_init, which processes a single initializer (part of
5535 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5536 iterator within the CONSTRUCTOR which points to the initializer to process.
5537 FIRST_INITIALIZER_P is true if this is the first initializer of the
5538 outermost CONSTRUCTOR node. */
5541 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5542 tsubst_flags_t complain
)
5544 tree init
= d
->cur
->value
;
5546 if (error_operand_p (init
))
5547 return error_mark_node
;
5549 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5550 && has_designator_problem (d
, complain
))
5551 return error_mark_node
;
5553 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5555 /* A complex type can be initialized from one or two initializers,
5556 but braces are not elided. */
5558 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5560 if (CONSTRUCTOR_NELTS (init
) > 2)
5562 if (complain
& tf_error
)
5563 error ("too many initializers for %qT", type
);
5565 return error_mark_node
;
5568 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5570 vec
<constructor_elt
, va_gc
> *v
= 0;
5571 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5572 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5573 if (has_designator_problem (d
, complain
))
5574 return error_mark_node
;
5576 init
= build_constructor (init_list_type_node
, v
);
5581 /* A non-aggregate type is always initialized with a single
5583 if (!CP_AGGREGATE_TYPE_P (type
))
5585 /* It is invalid to initialize a non-aggregate type with a
5586 brace-enclosed initializer before C++0x.
5587 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5588 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5589 a CONSTRUCTOR (with a record type). */
5590 if (TREE_CODE (init
) == CONSTRUCTOR
5591 /* Don't complain about a capture-init. */
5592 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5593 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5595 if (SCALAR_TYPE_P (type
))
5597 if (cxx_dialect
< cxx11
5598 /* Isn't value-initialization. */
5599 || CONSTRUCTOR_NELTS (init
) > 0)
5601 if (complain
& tf_error
)
5602 error ("braces around scalar initializer for type %qT",
5604 init
= error_mark_node
;
5608 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5615 /* "If T is a class type and the initializer list has a single element of
5616 type cv U, where U is T or a class derived from T, the object is
5617 initialized from that element." Even if T is an aggregate. */
5618 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5619 && first_initializer_p
5620 && d
->end
- d
->cur
== 1
5621 && reference_related_p (type
, TREE_TYPE (init
)))
5629 All implicit type conversions (clause _conv_) are considered when
5630 initializing the aggregate member with an initializer from an
5631 initializer-list. If the initializer can initialize a member,
5632 the member is initialized. Otherwise, if the member is itself a
5633 non-empty subaggregate, brace elision is assumed and the
5634 initializer is considered for the initialization of the first
5635 member of the subaggregate. */
5636 if (TREE_CODE (init
) != CONSTRUCTOR
5637 /* But don't try this for the first initializer, since that would be
5638 looking through the outermost braces; A a2 = { a1 }; is not a
5639 valid aggregate initialization. */
5640 && !first_initializer_p
5641 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5642 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5649 /* [dcl.init.string]
5651 A char array (whether plain char, signed char, or unsigned char)
5652 can be initialized by a string-literal (optionally enclosed in
5653 braces); a wchar_t array can be initialized by a wide
5654 string-literal (optionally enclosed in braces). */
5655 if (TREE_CODE (type
) == ARRAY_TYPE
5656 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5658 tree str_init
= init
;
5660 /* Strip one level of braces if and only if they enclose a single
5661 element (as allowed by [dcl.init.string]). */
5662 if (!first_initializer_p
5663 && TREE_CODE (str_init
) == CONSTRUCTOR
5664 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5666 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5669 /* If it's a string literal, then it's the initializer for the array
5670 as a whole. Otherwise, continue with normal initialization for
5671 array types (one value per array element). */
5672 if (TREE_CODE (str_init
) == STRING_CST
)
5674 if (has_designator_problem (d
, complain
))
5675 return error_mark_node
;
5681 /* The following cases are about aggregates. If we are not within a full
5682 initializer already, and there is not a CONSTRUCTOR, it means that there
5683 is a missing set of braces (that is, we are processing the case for
5684 which reshape_init exists). */
5685 if (!first_initializer_p
)
5687 if (TREE_CODE (init
) == CONSTRUCTOR
)
5689 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5690 /* There is no need to reshape pointer-to-member function
5691 initializers, as they are always constructed correctly
5692 by the front end. */
5694 else if (COMPOUND_LITERAL_P (init
))
5695 /* For a nested compound literal, there is no need to reshape since
5696 brace elision is not allowed. Even if we decided to allow it,
5697 we should add a call to reshape_init in finish_compound_literal,
5698 before calling digest_init, so changing this code would still
5699 not be necessary. */
5700 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5704 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5705 return reshape_init (type
, init
, complain
);
5709 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5713 /* Dispatch to specialized routines. */
5714 if (CLASS_TYPE_P (type
))
5715 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5716 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5717 return reshape_init_array (type
, d
, complain
);
5718 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5719 return reshape_init_vector (type
, d
, complain
);
5724 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5725 brace-enclosed aggregate initializer.
5727 INIT is the CONSTRUCTOR containing the list of initializers describing
5728 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5729 It may not presently match the shape of the TYPE; for example:
5731 struct S { int a; int b; };
5732 struct S a[] = { 1, 2, 3, 4 };
5734 Here INIT will hold a vector of four elements, rather than a
5735 vector of two elements, each itself a vector of two elements. This
5736 routine transforms INIT from the former form into the latter. The
5737 revised CONSTRUCTOR node is returned. */
5740 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5742 vec
<constructor_elt
, va_gc
> *v
;
5746 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5748 v
= CONSTRUCTOR_ELTS (init
);
5750 /* An empty constructor does not need reshaping, and it is always a valid
5752 if (vec_safe_is_empty (v
))
5755 /* Recurse on this CONSTRUCTOR. */
5757 d
.end
= d
.cur
+ v
->length ();
5759 new_init
= reshape_init_r (type
, &d
, true, complain
);
5760 if (new_init
== error_mark_node
)
5761 return error_mark_node
;
5763 /* Make sure all the element of the constructor were used. Otherwise,
5764 issue an error about exceeding initializers. */
5767 if (complain
& tf_error
)
5768 error ("too many initializers for %qT", type
);
5770 return error_mark_node
;
5776 /* Verify array initializer. Returns true if errors have been reported. */
5779 check_array_initializer (tree decl
, tree type
, tree init
)
5781 tree element_type
= TREE_TYPE (type
);
5783 /* The array type itself need not be complete, because the
5784 initializer may tell us how many elements are in the array.
5785 But, the elements of the array must be complete. */
5786 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5789 error ("elements of array %q#D have incomplete type", decl
);
5791 error ("elements of array %q#T have incomplete type", type
);
5794 /* A compound literal can't have variable size. */
5796 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5797 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5799 error ("variable-sized compound literal");
5805 /* Subroutine of check_initializer; args are passed down from that function.
5806 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5809 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5812 gcc_assert (stmts_are_full_exprs_p ());
5813 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5816 /* Verify INIT (the initializer for DECL), and record the
5817 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5818 grok_reference_init.
5820 If the return value is non-NULL, it is an expression that must be
5821 evaluated dynamically to initialize DECL. */
5824 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5826 tree type
= TREE_TYPE (decl
);
5827 tree init_code
= NULL
;
5830 /* Things that are going to be initialized need to have complete
5832 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5834 if (DECL_HAS_VALUE_EXPR_P (decl
))
5836 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5837 it doesn't have storage to be initialized. */
5838 gcc_assert (init
== NULL_TREE
);
5842 if (type
== error_mark_node
)
5843 /* We will have already complained. */
5846 if (TREE_CODE (type
) == ARRAY_TYPE
)
5848 if (check_array_initializer (decl
, type
, init
))
5851 else if (!COMPLETE_TYPE_P (type
))
5853 error ("%q#D has incomplete type", decl
);
5854 TREE_TYPE (decl
) = error_mark_node
;
5858 /* There is no way to make a variable-sized class type in GNU C++. */
5859 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5861 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5863 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5864 if (SCALAR_TYPE_P (type
))
5868 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5869 init
= build_zero_init (type
, NULL_TREE
, false);
5871 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5873 error ("scalar object %qD requires one element in initializer",
5875 TREE_TYPE (decl
) = error_mark_node
;
5881 if (TREE_CODE (decl
) == CONST_DECL
)
5883 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5885 DECL_INITIAL (decl
) = init
;
5887 gcc_assert (init
!= NULL_TREE
);
5890 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5892 else if (init
|| type_build_ctor_call (type
)
5893 || TREE_CODE (type
) == REFERENCE_TYPE
)
5895 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5897 init
= grok_reference_init (decl
, type
, init
, flags
);
5898 flags
|= LOOKUP_ALREADY_DIGESTED
;
5901 check_for_uninitialized_const_var (decl
);
5902 /* Do not reshape constructors of vectors (they don't need to be
5904 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5906 if (is_std_init_list (type
))
5908 init
= perform_implicit_conversion (type
, init
,
5909 tf_warning_or_error
);
5910 flags
|= LOOKUP_ALREADY_DIGESTED
;
5912 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5914 /* Don't reshape if the class has constructors. */
5915 if (cxx_dialect
== cxx98
)
5916 error ("in C++98 %qD must be initialized by constructor, "
5920 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5922 error ("opaque vector types cannot be initialized");
5923 init
= error_mark_node
;
5927 init
= reshape_init (type
, init
, tf_warning_or_error
);
5928 flags
|= LOOKUP_NO_NARROWING
;
5931 else if (TREE_CODE (init
) == TREE_LIST
5932 && TREE_TYPE (init
) != unknown_type_node
5933 && !MAYBE_CLASS_TYPE_P (type
))
5935 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5937 /* We get here with code like `int a (2);' */
5938 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5939 tf_warning_or_error
);
5942 /* If DECL has an array type without a specific bound, deduce the
5943 array size from the initializer. */
5944 maybe_deduce_size_from_array_init (decl
, init
);
5945 type
= TREE_TYPE (decl
);
5946 if (type
== error_mark_node
)
5949 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5950 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5951 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5952 && CP_AGGREGATE_TYPE_P (type
)
5953 && (CLASS_TYPE_P (type
)
5954 || !TYPE_NEEDS_CONSTRUCTING (type
)
5955 || type_has_extended_temps (type
))))
5957 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5959 /* A constructor call is a non-trivial initializer even if
5960 it isn't explicitly written. */
5961 if (TREE_SIDE_EFFECTS (init_code
))
5962 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5964 /* If this is a constexpr initializer, expand_default_init will
5965 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5966 case, pull the initializer back out and pass it down into
5967 store_init_value. */
5968 while (TREE_CODE (init_code
) == EXPR_STMT
5969 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5970 init_code
= TREE_OPERAND (init_code
, 0);
5971 if (TREE_CODE (init_code
) == INIT_EXPR
)
5973 init
= TREE_OPERAND (init_code
, 1);
5974 init_code
= NULL_TREE
;
5975 /* Don't call digest_init; it's unnecessary and will complain
5976 about aggregate initialization of non-aggregate classes. */
5977 flags
|= LOOKUP_ALREADY_DIGESTED
;
5979 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5981 /* Declared constexpr, but no suitable initializer; massage
5982 init appropriately so we can pass it into store_init_value
5984 if (CLASS_TYPE_P (type
)
5985 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5987 init
= build_functional_cast (type
, init
, tf_none
);
5988 if (TREE_CODE (init
) == TARGET_EXPR
)
5989 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5991 init_code
= NULL_TREE
;
5997 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5999 /* In aggregate initialization of a variable, each element
6000 initialization is a full-expression because there is no
6001 enclosing expression. */
6002 gcc_assert (stmts_are_full_exprs_p ());
6004 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6006 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6007 && DECL_INITIAL (decl
)
6008 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6009 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6010 warning (0, "array %qD initialized by parenthesized string literal %qE",
6011 decl
, DECL_INITIAL (decl
));
6017 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6018 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6019 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6020 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6023 check_for_uninitialized_const_var (decl
);
6026 if (init
&& init
!= error_mark_node
)
6027 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6031 /* We might have set these in cp_finish_decl. */
6032 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6033 TREE_CONSTANT (decl
) = false;
6036 if (init_code
&& DECL_IN_AGGR_P (decl
))
6038 static int explained
= 0;
6040 if (cxx_dialect
< cxx11
)
6041 error ("initializer invalid for static member with constructor");
6043 error ("non-constant in-class initialization invalid for static "
6044 "member %qD", decl
);
6047 inform (input_location
,
6048 "(an out of class initialization is required)");
6057 /* If DECL is not a local variable, give it RTL. */
6060 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6062 int toplev
= toplevel_bindings_p ();
6065 /* Set the DECL_ASSEMBLER_NAME for the object. */
6068 /* The `register' keyword, when used together with an
6069 asm-specification, indicates that the variable should be
6070 placed in a particular register. */
6071 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6073 set_user_assembler_name (decl
, asmspec
);
6074 DECL_HARD_REGISTER (decl
) = 1;
6078 if (TREE_CODE (decl
) == FUNCTION_DECL
6079 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6080 set_builtin_user_assembler_name (decl
, asmspec
);
6081 set_user_assembler_name (decl
, asmspec
);
6085 /* Handle non-variables up front. */
6088 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6092 /* If we see a class member here, it should be a static data
6094 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6096 gcc_assert (TREE_STATIC (decl
));
6097 /* An in-class declaration of a static data member should be
6098 external; it is only a declaration, and not a definition. */
6099 if (init
== NULL_TREE
)
6100 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6103 /* We don't create any RTL for local variables. */
6104 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6107 /* We defer emission of local statics until the corresponding
6108 DECL_EXPR is expanded. */
6109 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6111 /* Defer template instantiations. */
6112 if (DECL_LANG_SPECIFIC (decl
)
6113 && DECL_IMPLICIT_INSTANTIATION (decl
))
6116 /* If we're not deferring, go ahead and assemble the variable. */
6118 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6121 /* walk_tree helper for wrap_temporary_cleanups, below. */
6124 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6126 /* Stop at types or full-expression boundaries. */
6127 if (TYPE_P (*stmt_p
)
6128 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6134 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6136 tree guard
= (tree
)data
;
6137 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6139 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6140 /* Tell honor_protect_cleanup_actions to handle this as a separate
6142 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6144 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6150 /* We're initializing a local variable which has a cleanup GUARD. If there
6151 are any temporaries used in the initializer INIT of this variable, we
6152 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6153 variable will be cleaned up properly if one of them throws.
6155 Unfortunately, there's no way to express this properly in terms of
6156 nesting, as the regions for the temporaries overlap the region for the
6157 variable itself; if there are two temporaries, the variable needs to be
6158 the first thing destroyed if either of them throws. However, we only
6159 want to run the variable's cleanup if it actually got constructed. So
6160 we need to guard the temporary cleanups with the variable's cleanup if
6161 they are run on the normal path, but not if they are run on the
6162 exceptional path. We implement this by telling
6163 honor_protect_cleanup_actions to strip the variable cleanup from the
6164 exceptional path. */
6167 wrap_temporary_cleanups (tree init
, tree guard
)
6169 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6172 /* Generate code to initialize DECL (a local variable). */
6175 initialize_local_var (tree decl
, tree init
)
6177 tree type
= TREE_TYPE (decl
);
6181 gcc_assert (VAR_P (decl
)
6182 || TREE_CODE (decl
) == RESULT_DECL
);
6183 gcc_assert (!TREE_STATIC (decl
));
6185 if (DECL_SIZE (decl
) == NULL_TREE
)
6187 /* If we used it already as memory, it must stay in memory. */
6188 DECL_INITIAL (decl
) = NULL_TREE
;
6189 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6193 if (type
== error_mark_node
)
6196 /* Compute and store the initial value. */
6197 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6198 if (TREE_USED (type
))
6199 DECL_READ_P (decl
) = 1;
6201 /* Generate a cleanup, if necessary. */
6202 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6204 /* Perform the initialization. */
6207 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6208 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6209 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6211 /* Stick simple initializers in DECL_INITIAL so that
6212 -Wno-init-self works (c++/34772). */
6213 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6214 DECL_INITIAL (decl
) = rinit
;
6216 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6220 warning_at (DECL_SOURCE_LOCATION (decl
),
6222 "reference %qD is initialized with itself", decl
);
6227 int saved_stmts_are_full_exprs_p
;
6229 /* If we're only initializing a single object, guard the
6230 destructors of any temporaries used in its initializer with
6231 its destructor. This isn't right for arrays because each
6232 element initialization is a full-expression. */
6233 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6234 wrap_temporary_cleanups (init
, cleanup
);
6236 gcc_assert (building_stmt_list_p ());
6237 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6238 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6239 finish_expr_stmt (init
);
6240 current_stmt_tree ()->stmts_are_full_exprs_p
=
6241 saved_stmts_are_full_exprs_p
;
6245 /* Set this to 0 so we can tell whether an aggregate which was
6246 initialized was ever used. Don't do this if it has a
6247 destructor, so we don't complain about the 'resource
6248 allocation is initialization' idiom. Now set
6249 attribute((unused)) on types so decls of that type will be
6250 marked used. (see TREE_USED, above.) */
6251 if (TYPE_NEEDS_CONSTRUCTING (type
)
6253 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6254 && DECL_NAME (decl
))
6255 TREE_USED (decl
) = 0;
6256 else if (already_used
)
6257 TREE_USED (decl
) = 1;
6260 finish_decl_cleanup (decl
, cleanup
);
6263 /* DECL is a VAR_DECL for a compiler-generated variable with static
6264 storage duration (like a virtual table) whose initializer is a
6265 compile-time constant. Initialize the variable and provide it to the
6269 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6272 gcc_assert (DECL_ARTIFICIAL (decl
));
6273 init
= build_constructor (TREE_TYPE (decl
), v
);
6274 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6275 DECL_INITIAL (decl
) = init
;
6276 DECL_INITIALIZED_P (decl
) = 1;
6277 determine_visibility (decl
);
6278 layout_var_decl (decl
);
6279 maybe_commonize_var (decl
);
6280 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6283 /* INIT is the initializer for a variable, as represented by the
6284 parser. Returns true iff INIT is type-dependent. */
6287 type_dependent_init_p (tree init
)
6289 if (TREE_CODE (init
) == TREE_LIST
)
6290 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6291 return any_type_dependent_elements_p (init
);
6292 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6293 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6295 vec
<constructor_elt
, va_gc
> *elts
;
6299 elts
= CONSTRUCTOR_ELTS (init
);
6300 nelts
= vec_safe_length (elts
);
6301 for (i
= 0; i
< nelts
; ++i
)
6302 if (type_dependent_init_p ((*elts
)[i
].value
))
6306 /* It must be a simple expression, e.g., int i = 3; */
6307 return type_dependent_expression_p (init
);
6312 /* INIT is the initializer for a variable, as represented by the
6313 parser. Returns true iff INIT is value-dependent. */
6316 value_dependent_init_p (tree init
)
6318 if (TREE_CODE (init
) == TREE_LIST
)
6319 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6320 return any_value_dependent_elements_p (init
);
6321 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6322 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6324 vec
<constructor_elt
, va_gc
> *elts
;
6328 elts
= CONSTRUCTOR_ELTS (init
);
6329 nelts
= vec_safe_length (elts
);
6330 for (i
= 0; i
< nelts
; ++i
)
6331 if (value_dependent_init_p ((*elts
)[i
].value
))
6335 /* It must be a simple expression, e.g., int i = 3; */
6336 return value_dependent_expression_p (init
);
6341 /* Finish processing of a declaration;
6342 install its line number and initial value.
6343 If the length of an array type is not known before,
6344 it must be determined now, from the initial value, or it is an error.
6346 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6347 true, then INIT is an integral constant expression.
6349 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6350 if the (init) syntax was used. */
6353 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6354 tree asmspec_tree
, int flags
)
6357 vec
<tree
, va_gc
> *cleanups
= NULL
;
6358 const char *asmspec
= NULL
;
6359 int was_readonly
= 0;
6360 bool var_definition_p
= false;
6363 if (decl
== error_mark_node
)
6368 error ("assignment (not initialization) in declaration");
6372 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6373 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6374 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6376 type
= TREE_TYPE (decl
);
6377 if (type
== error_mark_node
)
6380 /* If a name was specified, get the string. */
6381 if (at_namespace_scope_p ())
6382 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6383 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6384 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6386 if (current_class_type
6387 && CP_DECL_CONTEXT (decl
) == current_class_type
6388 && TYPE_BEING_DEFINED (current_class_type
)
6389 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6390 && (DECL_INITIAL (decl
) || init
))
6391 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6393 if (TREE_CODE (decl
) != FUNCTION_DECL
6394 && (auto_node
= type_uses_auto (type
)))
6397 if (init
== NULL_TREE
)
6399 if (DECL_LANG_SPECIFIC (decl
)
6400 && DECL_TEMPLATE_INSTANTIATION (decl
)
6401 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6403 /* init is null because we're deferring instantiating the
6404 initializer until we need it. Well, we need it now. */
6405 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6409 error ("declaration of %q#D has no initializer", decl
);
6410 TREE_TYPE (decl
) = error_mark_node
;
6414 if (TREE_CODE (d_init
) == TREE_LIST
)
6415 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6416 tf_warning_or_error
);
6417 d_init
= resolve_nondeduced_context (d_init
);
6418 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6420 if (type
== error_mark_node
)
6422 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6425 if (!ensure_literal_type_for_constexpr_object (decl
))
6426 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6429 && DECL_CLASS_SCOPE_P (decl
)
6430 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6431 check_static_variable_definition (decl
, type
);
6433 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6436 if (init
== ridpointers
[(int)RID_DELETE
])
6438 /* FIXME check this is 1st decl. */
6439 DECL_DELETED_FN (decl
) = 1;
6440 DECL_DECLARED_INLINE_P (decl
) = 1;
6441 DECL_INITIAL (decl
) = error_mark_node
;
6442 FOR_EACH_CLONE (clone
, decl
)
6444 DECL_DELETED_FN (clone
) = 1;
6445 DECL_DECLARED_INLINE_P (clone
) = 1;
6446 DECL_INITIAL (clone
) = error_mark_node
;
6450 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6452 if (defaultable_fn_check (decl
))
6453 DECL_DEFAULTED_FN (decl
) = 1;
6455 DECL_INITIAL (decl
) = NULL_TREE
;
6459 if (init
&& VAR_P (decl
))
6461 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6462 /* If DECL is a reference, then we want to know whether init is a
6463 reference constant; init_const_expr_p as passed tells us whether
6464 it's an rvalue constant. */
6465 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6466 init_const_expr_p
= potential_constant_expression (init
);
6467 if (init_const_expr_p
)
6469 /* Set these flags now for templates. We'll update the flags in
6470 store_init_value for instantiations. */
6471 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6472 if (decl_maybe_constant_var_p (decl
))
6473 TREE_CONSTANT (decl
) = 1;
6477 if (processing_template_decl
)
6479 bool type_dependent_p
;
6481 /* Add this declaration to the statement-tree. */
6482 if (at_function_scope_p ())
6483 add_decl_expr (decl
);
6485 type_dependent_p
= dependent_type_p (type
);
6487 if (check_for_bare_parameter_packs (init
))
6490 DECL_INITIAL (decl
) = NULL_TREE
;
6493 /* Generally, initializers in templates are expanded when the
6494 template is instantiated. But, if DECL is a variable constant
6495 then it can be used in future constant expressions, so its value
6496 must be available. */
6498 if (!VAR_P (decl
) || dependent_type_p (type
))
6499 /* We can't do anything if the decl has dependent type. */;
6501 && init_const_expr_p
6502 && !type_dependent_p
6503 && TREE_CODE (type
) != REFERENCE_TYPE
6504 && decl_maybe_constant_var_p (decl
)
6505 && !type_dependent_init_p (init
)
6506 && !value_dependent_init_p (init
))
6508 /* This variable seems to be a non-dependent constant, so process
6509 its initializer. If check_initializer returns non-null the
6510 initialization wasn't constant after all. */
6512 cleanups
= make_tree_vector ();
6513 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6514 if (init_code
== NULL_TREE
)
6516 release_tree_vector (cleanups
);
6518 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6520 /* Deduce array size even if the initializer is dependent. */
6521 maybe_deduce_size_from_array_init (decl
, init
);
6522 /* And complain about multiple initializers. */
6523 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6524 && !MAYBE_CLASS_TYPE_P (type
))
6525 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6526 tf_warning_or_error
);
6530 DECL_INITIAL (decl
) = init
;
6534 /* Just store non-static data member initializers for later. */
6535 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6536 DECL_INITIAL (decl
) = init
;
6538 /* Take care of TYPE_DECLs up front. */
6539 if (TREE_CODE (decl
) == TYPE_DECL
)
6541 if (type
!= error_mark_node
6542 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6544 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6545 warning (0, "shadowing previous type declaration of %q#D", decl
);
6546 set_identifier_type_value (DECL_NAME (decl
), decl
);
6549 /* If we have installed this as the canonical typedef for this
6550 type, and that type has not been defined yet, delay emitting
6551 the debug information for it, as we will emit it later. */
6552 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6553 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6554 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6556 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6561 /* A reference will be modified here, as it is initialized. */
6562 if (! DECL_EXTERNAL (decl
)
6563 && TREE_READONLY (decl
)
6564 && TREE_CODE (type
) == REFERENCE_TYPE
)
6567 TREE_READONLY (decl
) = 0;
6572 /* If this is a local variable that will need a mangled name,
6573 register it now. We must do this before processing the
6574 initializer for the variable, since the initialization might
6575 require a guard variable, and since the mangled name of the
6576 guard variable will depend on the mangled name of this
6578 if (DECL_FUNCTION_SCOPE_P (decl
)
6579 && TREE_STATIC (decl
)
6580 && !DECL_ARTIFICIAL (decl
))
6582 push_local_name (decl
);
6583 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6584 || DECL_DESTRUCTOR_P (current_function_decl
))
6585 /* Normally local_decls is populated during GIMPLE lowering,
6586 but [cd]tors are never actually compiled directly. We need
6587 to put statics on the list so we can deal with the label
6588 address extension. FIXME. */
6589 add_local_decl (cfun
, decl
);
6592 /* Convert the initializer to the type of DECL, if we have not
6593 already initialized DECL. */
6594 if (!DECL_INITIALIZED_P (decl
)
6595 /* If !DECL_EXTERNAL then DECL is being defined. In the
6596 case of a static data member initialized inside the
6597 class-specifier, there can be an initializer even if DECL
6598 is *not* defined. */
6599 && (!DECL_EXTERNAL (decl
) || init
))
6601 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6604 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6605 /* Allow libjava/prims.cc define primitive classes. */
6606 if (init
!= NULL_TREE
6607 || jclass
== NULL_TREE
6608 || TREE_CODE (jclass
) != TYPE_DECL
6609 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6610 || !same_type_ignoring_top_level_qualifiers_p
6611 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6612 error ("Java object %qD not allocated with %<new%>", decl
);
6615 cleanups
= make_tree_vector ();
6616 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6622 The memory occupied by any object of static storage
6623 duration is zero-initialized at program startup before
6624 any other initialization takes place.
6626 We cannot create an appropriate initializer until after
6627 the type of DECL is finalized. If DECL_INITIAL is set,
6628 then the DECL is statically initialized, and any
6629 necessary zero-initialization has already been performed. */
6630 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6631 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6632 /*nelts=*/NULL_TREE
,
6633 /*static_storage_p=*/true);
6634 /* Remember that the initialization for this variable has
6636 DECL_INITIALIZED_P (decl
) = 1;
6637 /* This declaration is the definition of this variable,
6638 unless we are initializing a static data member within
6639 the class specifier. */
6640 if (!DECL_EXTERNAL (decl
))
6641 var_definition_p
= true;
6643 /* If the variable has an array type, lay out the type, even if
6644 there is no initializer. It is valid to index through the
6645 array, and we must get TYPE_ALIGN set correctly on the array
6647 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6650 if (TREE_STATIC (decl
)
6651 && !at_function_scope_p ()
6652 && current_function_decl
== NULL
)
6653 /* So decl is a global variable or a static member of a
6654 non local class. Record the types it uses
6655 so that we can decide later to emit debug info for them. */
6656 record_types_used_by_current_var_decl (decl
);
6658 else if (TREE_CODE (decl
) == FIELD_DECL
6659 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6660 error ("non-static data member %qD has Java class type", decl
);
6662 /* Add this declaration to the statement-tree. This needs to happen
6663 after the call to check_initializer so that the DECL_EXPR for a
6664 reference temp is added before the DECL_EXPR for the reference itself. */
6665 if (DECL_FUNCTION_SCOPE_P (decl
))
6667 /* If we're building a variable sized type, and we might be
6668 reachable other than via the top of the current binding
6669 level, then create a new BIND_EXPR so that we deallocate
6670 the object at the right time. */
6673 && !TREE_CONSTANT (DECL_SIZE (decl
))
6674 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6677 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6678 TREE_SIDE_EFFECTS (bind
) = 1;
6680 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6682 add_decl_expr (decl
);
6685 /* Let the middle end know about variables and functions -- but not
6686 static data members in uninstantiated class templates. */
6687 if (VAR_OR_FUNCTION_DECL_P (decl
))
6691 layout_var_decl (decl
);
6692 maybe_commonize_var (decl
);
6695 /* This needs to happen after the linkage is set. */
6696 determine_visibility (decl
);
6698 if (var_definition_p
&& TREE_STATIC (decl
))
6700 /* If a TREE_READONLY variable needs initialization
6701 at runtime, it is no longer readonly and we need to
6702 avoid MEM_READONLY_P being set on RTL created for it. */
6705 if (TREE_READONLY (decl
))
6706 TREE_READONLY (decl
) = 0;
6709 else if (was_readonly
)
6710 TREE_READONLY (decl
) = 1;
6712 /* Likewise if it needs destruction. */
6713 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6714 TREE_READONLY (decl
) = 0;
6717 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6719 /* Check for abstractness of the type. Notice that there is no
6720 need to strip array types here since the check for those types
6721 is already done within create_array_type_for_decl. */
6722 abstract_virtuals_error (decl
, type
);
6724 if (TREE_TYPE (decl
) == error_mark_node
)
6725 /* No initialization required. */
6727 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6731 if (init
== ridpointers
[(int)RID_DEFAULT
])
6733 /* An out-of-class default definition is defined at
6734 the point where it is explicitly defaulted. */
6735 if (DECL_DELETED_FN (decl
))
6736 maybe_explain_implicit_delete (decl
);
6737 else if (DECL_INITIAL (decl
) == error_mark_node
)
6738 synthesize_method (decl
);
6741 error ("function %q#D is initialized like a variable", decl
);
6743 /* else no initialization required. */
6745 else if (DECL_EXTERNAL (decl
)
6746 && ! (DECL_LANG_SPECIFIC (decl
)
6747 && DECL_NOT_REALLY_EXTERN (decl
)))
6750 DECL_INITIAL (decl
) = init
;
6752 /* A variable definition. */
6753 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6754 /* Initialize the local variable. */
6755 initialize_local_var (decl
, init
);
6757 /* If a variable is defined, and then a subsequent
6758 definition with external linkage is encountered, we will
6759 get here twice for the same variable. We want to avoid
6760 calling expand_static_init more than once. For variables
6761 that are not static data members, we can call
6762 expand_static_init only when we actually process the
6763 initializer. It is not legal to redeclare a static data
6764 member, so this issue does not arise in that case. */
6765 else if (var_definition_p
&& TREE_STATIC (decl
))
6766 expand_static_init (decl
, init
);
6769 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6770 reference, insert it in the statement-tree now. */
6774 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6775 push_cleanup (decl
, t
, false);
6776 release_tree_vector (cleanups
);
6780 TREE_READONLY (decl
) = 1;
6782 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6785 /* Returns a declaration for a VAR_DECL as if:
6787 extern "C" TYPE NAME;
6789 had been seen. Used to create compiler-generated global
6793 declare_global_var (tree name
, tree type
)
6797 push_to_top_level ();
6798 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6799 TREE_PUBLIC (decl
) = 1;
6800 DECL_EXTERNAL (decl
) = 1;
6801 DECL_ARTIFICIAL (decl
) = 1;
6802 /* If the user has explicitly declared this variable (perhaps
6803 because the code we are compiling is part of a low-level runtime
6804 library), then it is possible that our declaration will be merged
6805 with theirs by pushdecl. */
6806 decl
= pushdecl (decl
);
6807 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6808 pop_from_top_level ();
6813 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6814 if "__cxa_atexit" is not being used) corresponding to the function
6815 to be called when the program exits. */
6818 get_atexit_fn_ptr_type (void)
6822 if (!atexit_fn_ptr_type_node
)
6825 if (flag_use_cxa_atexit
6826 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6827 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6828 arg_type
= ptr_type_node
;
6830 /* The parameter to "atexit" is "void (*)(void)". */
6831 arg_type
= NULL_TREE
;
6833 fn_type
= build_function_type_list (void_type_node
,
6834 arg_type
, NULL_TREE
);
6835 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6838 return atexit_fn_ptr_type_node
;
6841 /* Returns a pointer to the `atexit' function. Note that if
6842 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6843 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6846 get_atexit_node (void)
6852 bool use_aeabi_atexit
;
6857 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6859 /* The declaration for `__cxa_atexit' is:
6861 int __cxa_atexit (void (*)(void *), void *, void *)
6863 We build up the argument types and then the function type
6865 tree argtype0
, argtype1
, argtype2
;
6867 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6868 /* First, build the pointer-to-function type for the first
6870 fn_ptr_type
= get_atexit_fn_ptr_type ();
6871 /* Then, build the rest of the argument types. */
6872 argtype2
= ptr_type_node
;
6873 if (use_aeabi_atexit
)
6875 argtype1
= fn_ptr_type
;
6876 argtype0
= ptr_type_node
;
6880 argtype1
= ptr_type_node
;
6881 argtype0
= fn_ptr_type
;
6883 /* And the final __cxa_atexit type. */
6884 fn_type
= build_function_type_list (integer_type_node
,
6885 argtype0
, argtype1
, argtype2
,
6887 if (use_aeabi_atexit
)
6888 name
= "__aeabi_atexit";
6890 name
= "__cxa_atexit";
6894 /* The declaration for `atexit' is:
6896 int atexit (void (*)());
6898 We build up the argument types and then the function type
6900 fn_ptr_type
= get_atexit_fn_ptr_type ();
6901 /* Build the final atexit type. */
6902 fn_type
= build_function_type_list (integer_type_node
,
6903 fn_ptr_type
, NULL_TREE
);
6907 /* Now, build the function declaration. */
6908 push_lang_context (lang_name_c
);
6909 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6910 mark_used (atexit_fndecl
);
6911 pop_lang_context ();
6912 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6917 /* Like get_atexit_node, but for thread-local cleanups. */
6920 get_thread_atexit_node (void)
6922 /* The declaration for `__cxa_thread_atexit' is:
6924 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6925 tree fn_type
= build_function_type_list (integer_type_node
,
6926 get_atexit_fn_ptr_type (),
6927 ptr_type_node
, ptr_type_node
,
6930 /* Now, build the function declaration. */
6931 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6932 ECF_LEAF
| ECF_NOTHROW
);
6933 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6936 /* Returns the __dso_handle VAR_DECL. */
6939 get_dso_handle_node (void)
6941 if (dso_handle_node
)
6942 return dso_handle_node
;
6944 /* Declare the variable. */
6945 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6948 #ifdef HAVE_GAS_HIDDEN
6949 if (dso_handle_node
!= error_mark_node
)
6951 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6952 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6956 return dso_handle_node
;
6959 /* Begin a new function with internal linkage whose job will be simply
6960 to destroy some particular variable. */
6962 static GTY(()) int start_cleanup_cnt
;
6965 start_cleanup_fn (void)
6970 bool use_cxa_atexit
= flag_use_cxa_atexit
6971 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6973 push_to_top_level ();
6975 /* No need to mangle this. */
6976 push_lang_context (lang_name_c
);
6978 /* Build the name of the function. */
6979 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6980 /* Build the function declaration. */
6981 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6982 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6983 /* It's a function with internal linkage, generated by the
6985 TREE_PUBLIC (fndecl
) = 0;
6986 DECL_ARTIFICIAL (fndecl
) = 1;
6987 /* Make the function `inline' so that it is only emitted if it is
6988 actually needed. It is unlikely that it will be inlined, since
6989 it is only called via a function pointer, but we avoid unnecessary
6990 emissions this way. */
6991 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6992 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6993 /* Build the parameter. */
6998 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6999 DECL_CONTEXT (parmdecl
) = fndecl
;
7000 TREE_USED (parmdecl
) = 1;
7001 DECL_READ_P (parmdecl
) = 1;
7002 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7006 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7008 pop_lang_context ();
7010 return current_function_decl
;
7013 /* Finish the cleanup function begun by start_cleanup_fn. */
7016 end_cleanup_fn (void)
7018 expand_or_defer_fn (finish_function (0));
7020 pop_from_top_level ();
7023 /* Generate code to handle the destruction of DECL, an object with
7024 static storage duration. */
7027 register_dtor_fn (tree decl
)
7034 bool ob_parm
, dso_parm
, use_dtor
;
7035 tree arg0
, arg1
, arg2
;
7038 type
= TREE_TYPE (decl
);
7039 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7042 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7043 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7044 destructor to "__cxa_atexit"; we don't have to build a temporary
7045 function to do the cleanup. */
7046 dso_parm
= (flag_use_cxa_atexit
7047 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7048 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7049 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7054 /* Find the destructor. */
7055 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7056 gcc_assert (idx
>= 0);
7057 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7058 /* Make sure it is accessible. */
7059 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7060 tf_warning_or_error
);
7064 /* Call build_cleanup before we enter the anonymous function so
7065 that any access checks will be done relative to the current
7066 scope, rather than the scope of the anonymous function. */
7067 build_cleanup (decl
);
7069 /* Now start the function. */
7070 cleanup
= start_cleanup_fn ();
7072 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7073 to the original function, rather than the anonymous one. That
7074 will make the back end think that nested functions are in use,
7075 which causes confusion. */
7076 push_deferring_access_checks (dk_no_check
);
7077 fcall
= build_cleanup (decl
);
7078 pop_deferring_access_checks ();
7080 /* Create the body of the anonymous function. */
7081 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7082 finish_expr_stmt (fcall
);
7083 finish_compound_stmt (compound_stmt
);
7087 /* Call atexit with the cleanup function. */
7088 mark_used (cleanup
);
7089 cleanup
= build_address (cleanup
);
7091 if (DECL_THREAD_LOCAL_P (decl
))
7092 atex_node
= get_thread_atexit_node ();
7094 atex_node
= get_atexit_node ();
7098 /* We must convert CLEANUP to the type that "__cxa_atexit"
7100 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7101 /* "__cxa_atexit" will pass the address of DECL to the
7102 cleanup function. */
7104 addr
= build_address (decl
);
7105 /* The declared type of the parameter to "__cxa_atexit" is
7106 "void *". For plain "T*", we could just let the
7107 machinery in cp_build_function_call convert it -- but if the
7108 type is "cv-qualified T *", then we need to convert it
7109 before passing it in, to avoid spurious errors. */
7110 addr
= build_nop (ptr_type_node
, addr
);
7113 /* Since the cleanup functions we build ignore the address
7114 they're given, there's no reason to pass the actual address
7115 in, and, in general, it's cheaper to pass NULL than any
7117 addr
= null_pointer_node
;
7120 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7121 tf_warning_or_error
);
7123 /* Just pass NULL to the dso handle parm if we don't actually
7124 have a DSO handle on this target. */
7125 arg2
= null_pointer_node
;
7131 if (!DECL_THREAD_LOCAL_P (decl
)
7132 && targetm
.cxx
.use_aeabi_atexit ())
7148 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7149 arg0
, arg1
, arg2
, NULL_TREE
);
7152 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7153 is its initializer. Generate code to handle the construction
7154 and destruction of DECL. */
7157 expand_static_init (tree decl
, tree init
)
7159 gcc_assert (VAR_P (decl
));
7160 gcc_assert (TREE_STATIC (decl
));
7162 /* Some variables require no dynamic initialization. */
7164 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7166 /* Make sure the destructor is callable. */
7167 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7171 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7172 && !DECL_FUNCTION_SCOPE_P (decl
))
7175 error ("non-local variable %qD declared %<__thread%> "
7176 "needs dynamic initialization", decl
);
7178 error ("non-local variable %qD declared %<__thread%> "
7179 "has a non-trivial destructor", decl
);
7180 static bool informed
;
7183 inform (DECL_SOURCE_LOCATION (decl
),
7184 "C++11 %<thread_local%> allows dynamic initialization "
7191 if (DECL_FUNCTION_SCOPE_P (decl
))
7193 /* Emit code to perform this initialization but once. */
7194 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7195 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7196 tree guard
, guard_addr
;
7198 /* We don't need thread-safety code for thread-local vars. */
7199 bool thread_guard
= (flag_threadsafe_statics
7200 && !DECL_THREAD_LOCAL_P (decl
));
7202 /* Emit code to perform this initialization but once. This code
7205 static <type> guard;
7206 if (!guard.first_byte) {
7207 if (__cxa_guard_acquire (&guard)) {
7210 // Do initialization.
7211 flag = true; __cxa_guard_release (&guard);
7212 // Register variable for destruction at end of program.
7214 if (!flag) __cxa_guard_abort (&guard);
7218 Note that the `flag' variable is only set to 1 *after* the
7219 initialization is complete. This ensures that an exception,
7220 thrown during the construction, will cause the variable to
7221 reinitialized when we pass through this code again, as per:
7225 If the initialization exits by throwing an exception, the
7226 initialization is not complete, so it will be tried again
7227 the next time control enters the declaration.
7229 This process should be thread-safe, too; multiple threads
7230 should not be able to initialize the variable more than
7233 /* Create the guard variable. */
7234 guard
= get_guard (decl
);
7236 /* This optimization isn't safe on targets with relaxed memory
7237 consistency. On such targets we force synchronization in
7238 __cxa_guard_acquire. */
7239 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7241 /* Begin the conditional initialization. */
7242 if_stmt
= begin_if_stmt ();
7243 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7244 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7249 tree vfntype
= NULL_TREE
;
7250 tree acquire_name
, release_name
, abort_name
;
7251 tree acquire_fn
, release_fn
, abort_fn
;
7252 guard_addr
= build_address (guard
);
7254 acquire_name
= get_identifier ("__cxa_guard_acquire");
7255 release_name
= get_identifier ("__cxa_guard_release");
7256 abort_name
= get_identifier ("__cxa_guard_abort");
7257 acquire_fn
= identifier_global_value (acquire_name
);
7258 release_fn
= identifier_global_value (release_name
);
7259 abort_fn
= identifier_global_value (abort_name
);
7261 acquire_fn
= push_library_fn
7262 (acquire_name
, build_function_type_list (integer_type_node
,
7263 TREE_TYPE (guard_addr
),
7265 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7266 if (!release_fn
|| !abort_fn
)
7267 vfntype
= build_function_type_list (void_type_node
,
7268 TREE_TYPE (guard_addr
),
7271 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7272 ECF_NOTHROW
| ECF_LEAF
);
7274 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7275 ECF_NOTHROW
| ECF_LEAF
);
7277 inner_if_stmt
= begin_if_stmt ();
7278 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7281 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7282 begin
= get_target_expr (boolean_false_node
);
7283 flag
= TARGET_EXPR_SLOT (begin
);
7285 TARGET_EXPR_CLEANUP (begin
)
7286 = build3 (COND_EXPR
, void_type_node
, flag
,
7288 build_call_n (abort_fn
, 1, guard_addr
));
7289 CLEANUP_EH_ONLY (begin
) = 1;
7291 /* Do the initialization itself. */
7292 init
= add_stmt_to_compound (begin
, init
);
7293 init
= add_stmt_to_compound
7294 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7295 init
= add_stmt_to_compound
7296 (init
, build_call_n (release_fn
, 1, guard_addr
));
7299 init
= add_stmt_to_compound (init
, set_guard (guard
));
7301 /* Use atexit to register a function for destroying this static
7303 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7305 finish_expr_stmt (init
);
7309 finish_compound_stmt (inner_then_clause
);
7310 finish_then_clause (inner_if_stmt
);
7311 finish_if_stmt (inner_if_stmt
);
7314 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7316 finish_compound_stmt (then_clause
);
7317 finish_then_clause (if_stmt
);
7318 finish_if_stmt (if_stmt
);
7321 else if (DECL_THREAD_LOCAL_P (decl
))
7322 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7324 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7328 /* Make TYPE a complete type based on INITIAL_VALUE.
7329 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7330 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7331 3 if the initializer list is empty (in pedantic mode). */
7334 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7337 tree type
, elt_type
;
7339 /* Don't get confused by a CONSTRUCTOR for some other type. */
7340 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7341 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7346 unsigned HOST_WIDE_INT i
;
7349 /* An array of character type can be initialized from a
7350 brace-enclosed string constant.
7352 FIXME: this code is duplicated from reshape_init. Probably
7353 we should just call reshape_init here? */
7354 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7355 && TREE_CODE (initial_value
) == CONSTRUCTOR
7356 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7358 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7359 tree value
= (*v
)[0].value
;
7361 if (TREE_CODE (value
) == STRING_CST
7362 && v
->length () == 1)
7363 initial_value
= value
;
7366 /* If any of the elements are parameter packs, we can't actually
7367 complete this type now because the array size is dependent. */
7368 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7370 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7373 if (PACK_EXPANSION_P (value
))
7379 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7381 /* We can create the array before the element type is complete, which
7382 means that we didn't have these two bits set in the original type
7383 either. In completing the type, we are expected to propagate these
7384 bits. See also complete_type which does the same thing for arrays
7387 if (TYPE_DOMAIN (type
))
7389 elt_type
= TREE_TYPE (type
);
7390 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7391 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7392 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7398 /* As above, but either give an error or reject zero-size arrays, depending
7402 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7403 bool do_default
, tsubst_flags_t complain
)
7406 bool sfinae
= !(complain
& tf_error
);
7407 /* In SFINAE context we can't be lenient about zero-size arrays. */
7410 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7416 /* Not an error. */;
7417 else if (failure
== 1)
7418 error ("initializer fails to determine size of %qT", *ptype
);
7419 else if (failure
== 2)
7422 error ("array size missing in %qT", *ptype
);
7424 else if (failure
== 3)
7425 error ("zero-size array %qT", *ptype
);
7426 *ptype
= error_mark_node
;
7431 /* Return zero if something is declared to be a member of type
7432 CTYPE when in the context of CUR_TYPE. STRING is the error
7433 message to print in that case. Otherwise, quietly return 1. */
7436 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7438 if (ctype
&& ctype
!= cur_type
)
7440 if (flags
== DTOR_FLAG
)
7441 error ("destructor for alien class %qT cannot be a member", ctype
);
7443 error ("constructor for alien class %qT cannot be a member", ctype
);
7449 /* Subroutine of `grokdeclarator'. */
7451 /* Generate errors possibly applicable for a given set of specifiers.
7452 This is for ARM $7.1.2. */
7455 bad_specifiers (tree object
,
7456 enum bad_spec_place type
,
7467 error ("%qD declared as a %<virtual%> variable", object
);
7469 error ("%qD declared as an %<inline%> variable", object
);
7471 error ("%<const%> and %<volatile%> function specifiers on "
7472 "%qD invalid in variable declaration", object
);
7476 error ("%qD declared as a %<virtual%> parameter", object
);
7478 error ("%qD declared as an %<inline%> parameter", object
);
7480 error ("%<const%> and %<volatile%> function specifiers on "
7481 "%qD invalid in parameter declaration", object
);
7485 error ("%qD declared as a %<virtual%> type", object
);
7487 error ("%qD declared as an %<inline%> type", object
);
7489 error ("%<const%> and %<volatile%> function specifiers on "
7490 "%qD invalid in type declaration", object
);
7494 error ("%qD declared as a %<virtual%> field", object
);
7496 error ("%qD declared as an %<inline%> field", object
);
7498 error ("%<const%> and %<volatile%> function specifiers on "
7499 "%qD invalid in field declaration", object
);
7505 error ("%q+D declared as a friend", object
);
7507 && (TREE_CODE (object
) == TYPE_DECL
7508 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7509 && !TYPE_REFFN_P (TREE_TYPE (object
))
7510 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7511 error ("%q+D declared with an exception specification", object
);
7514 /* DECL is a member function or static data member and is presently
7515 being defined. Check that the definition is taking place in a
7519 check_class_member_definition_namespace (tree decl
)
7521 /* These checks only apply to member functions and static data
7523 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7524 /* We check for problems with specializations in pt.c in
7525 check_specialization_namespace, where we can issue better
7527 if (processing_specialization
)
7529 /* There are no restrictions on the placement of
7530 explicit instantiations. */
7531 if (processing_explicit_instantiation
)
7535 A member function definition that appears outside of the
7536 class definition shall appear in a namespace scope enclosing
7537 the class definition.
7541 The definition for a static data member shall appear in a
7542 namespace scope enclosing the member's class definition. */
7543 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7544 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7545 decl
, DECL_CONTEXT (decl
));
7548 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7549 METHOD_TYPE for a non-static member function; QUALS are the
7550 cv-qualifiers that apply to the function. */
7553 build_this_parm (tree type
, cp_cv_quals quals
)
7558 cp_cv_quals this_quals
;
7560 if (CLASS_TYPE_P (type
))
7563 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7564 this_type
= build_pointer_type (this_type
);
7567 this_type
= type_of_this_parm (type
);
7568 /* The `this' parameter is implicitly `const'; it cannot be
7570 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7571 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7572 parm
= build_artificial_parm (this_identifier
, qual_type
);
7573 cp_apply_type_quals_to_decl (this_quals
, parm
);
7577 /* DECL is a static member function. Complain if it was declared
7578 with function-cv-quals. */
7581 check_static_quals (tree decl
, cp_cv_quals quals
)
7583 if (quals
!= TYPE_UNQUALIFIED
)
7584 error ("static member function %q#D declared with type qualifiers",
7588 /* Helper function. Replace the temporary this parameter injected
7589 during cp_finish_omp_declare_simd with the real this parameter. */
7592 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7594 tree this_parm
= (tree
) data
;
7595 if (TREE_CODE (*tp
) == PARM_DECL
7596 && DECL_NAME (*tp
) == this_identifier
7597 && *tp
!= this_parm
)
7599 else if (TYPE_P (*tp
))
7604 /* CTYPE is class type, or null if non-class.
7605 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7607 DECLARATOR is the function's name.
7608 PARMS is a chain of PARM_DECLs for the function.
7609 VIRTUALP is truthvalue of whether the function is virtual or not.
7610 FLAGS are to be passed through to `grokclassfn'.
7611 QUALS are qualifiers indicating whether the function is `const'
7613 RAISES is a list of exceptions that this function can raise.
7614 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7615 not look, and -1 if we should not call `grokclassfn' at all.
7617 SFK is the kind of special function (if any) for the new function.
7619 Returns `NULL_TREE' if something goes wrong, after issuing
7620 applicable error messages. */
7623 grokfndecl (tree ctype
,
7627 tree orig_declarator
,
7629 enum overload_flags flags
,
7631 cp_ref_qualifier rqual
,
7638 special_function_kind sfk
,
7643 location_t location
)
7646 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7650 type
= build_ref_qualified_type (type
, rqual
);
7652 type
= build_exception_variant (type
, raises
);
7654 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7656 /* If we have an explicit location, use it, otherwise use whatever
7657 build_lang_decl used (probably input_location). */
7658 if (location
!= UNKNOWN_LOCATION
)
7659 DECL_SOURCE_LOCATION (decl
) = location
;
7661 if (TREE_CODE (type
) == METHOD_TYPE
)
7664 parm
= build_this_parm (type
, quals
);
7665 DECL_CHAIN (parm
) = parms
;
7668 DECL_ARGUMENTS (decl
) = parms
;
7669 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7670 DECL_CONTEXT (t
) = decl
;
7671 /* Propagate volatile out from type to decl. */
7672 if (TYPE_VOLATILE (type
))
7673 TREE_THIS_VOLATILE (decl
) = 1;
7675 /* Setup decl according to sfk. */
7678 case sfk_constructor
:
7679 case sfk_copy_constructor
:
7680 case sfk_move_constructor
:
7681 DECL_CONSTRUCTOR_P (decl
) = 1;
7683 case sfk_destructor
:
7684 DECL_DESTRUCTOR_P (decl
) = 1;
7690 /* If pointers to member functions use the least significant bit to
7691 indicate whether a function is virtual, ensure a pointer
7692 to this function will have that bit clear. */
7693 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7694 && TREE_CODE (type
) == METHOD_TYPE
7695 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7696 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7699 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7703 ("defining explicit specialization %qD in friend declaration",
7707 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7708 tree args
= TREE_OPERAND (orig_declarator
, 1);
7710 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7712 /* Something like `template <class T> friend void f<T>()'. */
7713 error ("invalid use of template-id %qD in declaration "
7714 "of primary template",
7720 /* A friend declaration of the form friend void f<>(). Record
7721 the information in the TEMPLATE_ID_EXPR. */
7722 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7724 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7725 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7727 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7728 if (TREE_PURPOSE (t
)
7729 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7731 error ("default arguments are not allowed in declaration "
7732 "of friend template specialization %qD",
7738 error ("%<inline%> is not allowed in declaration of friend "
7739 "template specialization %qD",
7742 error ("%<constexpr%> is not allowed in declaration of friend "
7743 "template specialization %qD",
7750 /* If this decl has namespace scope, set that up. */
7752 set_decl_namespace (decl
, in_namespace
, friendp
);
7754 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7756 /* `main' and builtins have implicit 'C' linkage. */
7757 if ((MAIN_NAME_P (declarator
)
7758 || (IDENTIFIER_LENGTH (declarator
) > 10
7759 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7760 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7761 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7762 || (targetcm
.cxx_implicit_extern_c
7763 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7764 && current_lang_name
== lang_name_cplusplus
7765 && ctype
== NULL_TREE
7766 && DECL_FILE_SCOPE_P (decl
))
7767 SET_DECL_LANGUAGE (decl
, lang_c
);
7769 /* Should probably propagate const out from type to decl I bet (mrs). */
7772 DECL_STATIC_FUNCTION_P (decl
) = 1;
7773 DECL_CONTEXT (decl
) = ctype
;
7777 DECL_DELETED_FN (decl
) = 1;
7781 DECL_CONTEXT (decl
) = ctype
;
7783 check_class_member_definition_namespace (decl
);
7786 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7788 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7789 error ("cannot declare %<::main%> to be a template");
7791 error ("cannot declare %<::main%> to be inline");
7793 error ("cannot declare %<::main%> to be constexpr");
7795 error ("cannot declare %<::main%> to be static");
7800 /* Members of anonymous types and local classes have no linkage; make
7801 them internal. If a typedef is made later, this will be changed. */
7802 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7803 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7806 if (publicp
&& cxx_dialect
== cxx98
)
7808 /* [basic.link]: A name with no linkage (notably, the name of a class
7809 or enumeration declared in a local scope) shall not be used to
7810 declare an entity with linkage.
7812 DR 757 relaxes this restriction for C++0x. */
7813 no_linkage_error (decl
);
7816 TREE_PUBLIC (decl
) = publicp
;
7819 DECL_INTERFACE_KNOWN (decl
) = 1;
7820 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7823 /* If the declaration was declared inline, mark it as such. */
7826 DECL_DECLARED_INLINE_P (decl
) = 1;
7828 DECL_COMDAT (decl
) = 1;
7831 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7833 DECL_EXTERNAL (decl
) = 1;
7834 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7839 ? G_("static member function %qD cannot have cv-qualifier")
7840 : G_("non-member function %qD cannot have cv-qualifier"),
7842 quals
= TYPE_UNQUALIFIED
;
7848 ? G_("static member function %qD cannot have ref-qualifier")
7849 : G_("non-member function %qD cannot have ref-qualifier"),
7851 rqual
= REF_QUAL_NONE
;
7855 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7856 && !grok_op_properties (decl
, /*complain=*/true))
7858 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7860 bool long_long_unsigned_p
;
7862 const char *suffix
= NULL
;
7863 /* [over.literal]/6: Literal operators shall not have C linkage. */
7864 if (DECL_LANGUAGE (decl
) == lang_c
)
7866 error ("literal operator with C linkage");
7870 if (DECL_NAMESPACE_SCOPE_P (decl
))
7872 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7875 error ("%qD has invalid argument list", decl
);
7879 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7880 if (long_long_unsigned_p
)
7882 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7883 warning (0, "integer suffix %<%s%>"
7884 " shadowed by implementation", suffix
);
7886 else if (long_double_p
)
7888 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7889 warning (0, "floating point suffix %<%s%>"
7890 " shadowed by implementation", suffix
);
7895 error ("%qD must be a non-member function", decl
);
7901 /* Make the init_value nonzero so pushdecl knows this is not
7902 tentative. error_mark_node is replaced later with the BLOCK. */
7903 DECL_INITIAL (decl
) = error_mark_node
;
7905 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7906 TREE_NOTHROW (decl
) = 1;
7908 if (flag_openmp
|| flag_cilkplus
)
7910 /* Adjust "omp declare simd" attributes. */
7911 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7915 for (attr
= ods
; attr
;
7916 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7918 if (TREE_CODE (type
) == METHOD_TYPE
)
7919 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7920 DECL_ARGUMENTS (decl
), NULL
);
7921 if (TREE_VALUE (attr
) != NULL_TREE
)
7923 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7924 cl
= c_omp_declare_simd_clauses_to_numbers
7925 (DECL_ARGUMENTS (decl
), cl
);
7927 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7929 TREE_VALUE (attr
) = NULL_TREE
;
7935 /* Caller will do the rest of this. */
7939 if (ctype
!= NULL_TREE
)
7940 grokclassfn (ctype
, decl
, flags
);
7943 if (cxx_dialect
>= cxx11
7944 && DECL_DESTRUCTOR_P (decl
)
7945 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7946 && !processing_template_decl
)
7947 deduce_noexcept_on_destructor (decl
);
7949 decl
= check_explicit_specialization (orig_declarator
, decl
,
7952 4 * (friendp
!= 0));
7953 if (decl
== error_mark_node
)
7956 if (DECL_STATIC_FUNCTION_P (decl
))
7957 check_static_quals (decl
, quals
);
7961 cplus_decl_attributes (&decl
, *attrlist
, 0);
7962 *attrlist
= NULL_TREE
;
7965 /* Check main's type after attributes have been applied. */
7966 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7968 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7971 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7973 error ("%<::main%> must return %<int%>");
7974 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7975 TREE_TYPE (decl
) = newtype
;
7978 check_main_parameter_types (decl
);
7981 if (ctype
!= NULL_TREE
7982 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7985 tree old_decl
= check_classfn (ctype
, decl
,
7986 (processing_template_decl
7987 > template_class_depth (ctype
))
7988 ? current_template_parms
7991 if (old_decl
== error_mark_node
)
7999 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8000 /* Because grokfndecl is always supposed to return a
8001 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8002 here. We depend on our callers to figure out that its
8003 really a template that's being returned. */
8004 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8006 if (DECL_STATIC_FUNCTION_P (old_decl
)
8007 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8009 /* Remove the `this' parm added by grokclassfn. */
8010 revert_static_member_fn (decl
);
8011 check_static_quals (decl
, quals
);
8013 if (DECL_ARTIFICIAL (old_decl
))
8015 error ("definition of implicitly-declared %qD", old_decl
);
8018 else if (DECL_DEFAULTED_FN (old_decl
))
8020 error ("definition of explicitly-defaulted %q+D", decl
);
8021 error ("%q+#D explicitly defaulted here", old_decl
);
8025 /* Since we've smashed OLD_DECL to its
8026 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8027 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8028 decl
= DECL_TEMPLATE_RESULT (decl
);
8030 /* Attempt to merge the declarations. This can fail, in
8031 the case of some invalid specialization declarations. */
8032 pushed_scope
= push_scope (ctype
);
8033 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8035 pop_scope (pushed_scope
);
8038 error ("no %q#D member function declared in class %qT",
8042 if (ok
== error_mark_node
)
8048 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8051 if (ctype
== NULL_TREE
|| check
)
8055 DECL_VIRTUAL_P (decl
) = 1;
8060 /* decl is a FUNCTION_DECL.
8061 specifiers are the parsed virt-specifiers.
8063 Set flags to reflect the virt-specifiers.
8068 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8070 if (decl
== NULL_TREE
)
8072 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8073 DECL_OVERRIDE_P (decl
) = 1;
8074 if (specifiers
& VIRT_SPEC_FINAL
)
8075 DECL_FINAL_P (decl
) = 1;
8079 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8080 the linkage that DECL will receive in the object file. */
8083 set_linkage_for_static_data_member (tree decl
)
8085 /* A static data member always has static storage duration and
8086 external linkage. Note that static data members are forbidden in
8087 local classes -- the only situation in which a class has
8088 non-external linkage. */
8089 TREE_PUBLIC (decl
) = 1;
8090 TREE_STATIC (decl
) = 1;
8091 /* For non-template classes, static data members are always put
8092 out in exactly those files where they are defined, just as
8093 with ordinary namespace-scope variables. */
8094 if (!processing_template_decl
)
8095 DECL_INTERFACE_KNOWN (decl
) = 1;
8098 /* Create a VAR_DECL named NAME with the indicated TYPE.
8100 If SCOPE is non-NULL, it is the class type or namespace containing
8101 the variable. If SCOPE is NULL, the variable should is created in
8102 the innermost enclosing scope. */
8105 grokvardecl (tree type
,
8107 tree orig_declarator
,
8108 const cp_decl_specifier_seq
*declspecs
,
8115 tree explicit_scope
;
8117 gcc_assert (!name
|| identifier_p (name
));
8119 /* Compute the scope in which to place the variable, but remember
8120 whether or not that scope was explicitly specified by the user. */
8121 explicit_scope
= scope
;
8124 /* An explicit "extern" specifier indicates a namespace-scope
8126 if (declspecs
->storage_class
== sc_extern
)
8127 scope
= current_decl_namespace ();
8128 else if (!at_function_scope_p ())
8129 scope
= current_scope ();
8133 && (/* If the variable is a namespace-scope variable declared in a
8134 template, we need DECL_LANG_SPECIFIC. */
8135 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8136 /* Similarly for namespace-scope variables with language linkage
8138 || (TREE_CODE (scope
) == NAMESPACE_DECL
8139 && current_lang_name
!= lang_name_cplusplus
)
8140 /* Similarly for static data members. */
8142 /* Similarly for explicit specializations. */
8144 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8145 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8147 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8149 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8150 set_decl_namespace (decl
, explicit_scope
, 0);
8152 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8154 if (declspecs
->storage_class
== sc_extern
)
8156 DECL_THIS_EXTERN (decl
) = 1;
8157 DECL_EXTERNAL (decl
) = !initialized
;
8160 if (DECL_CLASS_SCOPE_P (decl
))
8162 set_linkage_for_static_data_member (decl
);
8163 /* This function is only called with out-of-class definitions. */
8164 DECL_EXTERNAL (decl
) = 0;
8165 check_class_member_definition_namespace (decl
);
8167 /* At top level, either `static' or no s.c. makes a definition
8168 (perhaps tentative), and absence of `static' makes it public. */
8169 else if (toplevel_bindings_p ())
8171 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8172 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8173 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8175 /* Not at top level, only `static' makes a static definition. */
8178 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8179 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8182 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8184 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8185 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8186 if (declspecs
->gnu_thread_keyword_p
)
8187 DECL_GNU_TLS_P (decl
) = true;
8190 /* If the type of the decl has no linkage, make sure that we'll
8191 notice that in mark_used. */
8192 if (cxx_dialect
> cxx98
8193 && decl_linkage (decl
) != lk_none
8194 && DECL_LANG_SPECIFIC (decl
) == NULL
8195 && !DECL_EXTERN_C_P (decl
)
8196 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8197 retrofit_lang_decl (decl
);
8199 if (TREE_PUBLIC (decl
))
8201 /* [basic.link]: A name with no linkage (notably, the name of a class
8202 or enumeration declared in a local scope) shall not be used to
8203 declare an entity with linkage.
8205 DR 757 relaxes this restriction for C++0x. */
8206 if (cxx_dialect
< cxx11
)
8207 no_linkage_error (decl
);
8210 DECL_INTERFACE_KNOWN (decl
) = 1;
8212 // Handle explicit specializations and instantiations of variable templates.
8214 /* For GCC 5 fix 65646 this way. */
8215 && current_tmpl_spec_kind (template_count
) != tsk_none
)
8216 decl
= check_explicit_specialization (orig_declarator
, decl
,
8219 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8222 /* Create and return a canonical pointer to member function type, for
8223 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8226 build_ptrmemfunc_type (tree type
)
8231 if (type
== error_mark_node
)
8234 /* If a canonical type already exists for this type, use it. We use
8235 this method instead of type_hash_canon, because it only does a
8236 simple equality check on the list of field members. */
8238 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8241 /* Make sure that we always have the unqualified pointer-to-member
8243 if (cp_cv_quals quals
= cp_type_quals (type
))
8245 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8246 return cp_build_qualified_type (unqual
, quals
);
8249 t
= make_node (RECORD_TYPE
);
8251 /* Let the front end know this is a pointer to member function. */
8252 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8254 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8257 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8259 DECL_CHAIN (field
) = fields
;
8262 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8264 /* Zap out the name so that the back end will give us the debugging
8265 information for this anonymous RECORD_TYPE. */
8266 TYPE_NAME (t
) = NULL_TREE
;
8268 /* Cache this pointer-to-member type so that we can find it again
8270 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8272 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8273 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8274 else if (TYPE_CANONICAL (type
) != type
)
8275 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8280 /* Create and return a pointer to data member type. */
8283 build_ptrmem_type (tree class_type
, tree member_type
)
8285 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8287 cp_cv_quals quals
= type_memfn_quals (member_type
);
8288 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8289 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8290 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8294 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8295 return build_offset_type (class_type
, member_type
);
8299 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8300 Check to see that the definition is valid. Issue appropriate error
8301 messages. Return 1 if the definition is particularly bad, or 0
8305 check_static_variable_definition (tree decl
, tree type
)
8307 /* Can't check yet if we don't know the type. */
8308 if (dependent_type_p (type
))
8310 /* If DECL is declared constexpr, we'll do the appropriate checks
8311 in check_initializer. */
8312 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8314 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8316 if (!COMPLETE_TYPE_P (type
))
8317 error ("in-class initialization of static data member %q#D of "
8318 "incomplete type", decl
);
8319 else if (literal_type_p (type
))
8320 permerror (input_location
,
8321 "%<constexpr%> needed for in-class initialization of "
8322 "static data member %q#D of non-integral type", decl
);
8324 error ("in-class initialization of static data member %q#D of "
8325 "non-literal type", decl
);
8329 /* Motion 10 at San Diego: If a static const integral data member is
8330 initialized with an integral constant expression, the initializer
8331 may appear either in the declaration (within the class), or in
8332 the definition, but not both. If it appears in the class, the
8333 member is a member constant. The file-scope definition is always
8335 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8337 error ("invalid in-class initialization of static data member "
8338 "of non-integral type %qT",
8342 else if (!CP_TYPE_CONST_P (type
))
8343 error ("ISO C++ forbids in-class initialization of non-const "
8344 "static member %qD",
8346 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8347 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8348 "%qD of non-integral type %qT", decl
, type
);
8353 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8354 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8355 expressions out into temporary variables so that walk_tree doesn't
8356 step into them (c++/15764). */
8359 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8361 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8362 tree expr
= *expr_p
;
8363 if (TREE_CODE (expr
) == SAVE_EXPR
)
8365 tree op
= TREE_OPERAND (expr
, 0);
8366 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8367 if (TREE_SIDE_EFFECTS (op
))
8368 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8371 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8376 /* Entry point for the above. */
8379 stabilize_vla_size (tree size
)
8381 hash_set
<tree
> pset
;
8382 /* Break out any function calls into temporary variables. */
8383 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8386 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8387 not inside of SAVE_EXPR and fold them. */
8390 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8392 tree expr
= *expr_p
;
8393 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8395 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8397 *(bool *)data
= true;
8398 if (SIZEOF_EXPR_TYPE_P (expr
))
8399 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8400 SIZEOF_EXPR
, false);
8401 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8402 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8405 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8407 if (expr
== error_mark_node
)
8408 expr
= size_one_node
;
8415 /* Given the SIZE (i.e., number of elements) in an array, compute an
8416 appropriate index type for the array. If non-NULL, NAME is the
8417 name of the thing being declared. */
8420 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8425 if (error_operand_p (size
))
8426 return error_mark_node
;
8428 if (!type_dependent_expression_p (size
))
8430 tree type
= TREE_TYPE (size
);
8432 mark_rvalue_use (size
);
8434 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8435 && TREE_SIDE_EFFECTS (size
))
8436 /* In C++98, we mark a non-constant array bound with a magic
8437 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8440 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8442 if (CLASS_TYPE_P (type
)
8443 && CLASSTYPE_LITERAL_P (type
))
8445 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8448 if (!(complain
& tf_error
))
8449 return error_mark_node
;
8451 error ("size of array %qD has non-integral type %qT",
8454 error ("size of array has non-integral type %qT", type
);
8455 size
= integer_one_node
;
8457 if (size
== error_mark_node
)
8458 return error_mark_node
;
8459 type
= TREE_TYPE (size
);
8462 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8463 size
= maybe_constant_value (size
);
8465 if (!TREE_CONSTANT (size
))
8469 if (error_operand_p (size
))
8470 return error_mark_node
;
8472 /* The array bound must be an integer type. */
8473 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8475 if (!(complain
& tf_error
))
8476 return error_mark_node
;
8478 error ("size of array %qD has non-integral type %qT", name
, type
);
8480 error ("size of array has non-integral type %qT", type
);
8481 size
= integer_one_node
;
8482 type
= TREE_TYPE (size
);
8486 /* A type is dependent if it is...an array type constructed from any
8487 dependent type or whose size is specified by a constant expression
8488 that is value-dependent. */
8489 /* We can only call value_dependent_expression_p on integral constant
8490 expressions; treat non-constant expressions as dependent, too. */
8491 if (processing_template_decl
8492 && (type_dependent_expression_p (size
)
8493 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8495 /* We cannot do any checking for a SIZE that isn't known to be
8496 constant. Just build the index type and mark that it requires
8497 structural equality checks. */
8498 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8499 size
, size_one_node
));
8500 TYPE_DEPENDENT_P (itype
) = 1;
8501 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8502 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8506 /* Normally, the array-bound will be a constant. */
8507 if (TREE_CODE (size
) == INTEGER_CST
)
8509 /* Check to see if the array bound overflowed. Make that an
8510 error, no matter how generous we're being. */
8511 constant_expression_error (size
);
8513 /* An array must have a positive number of elements. */
8514 if (tree_int_cst_lt (size
, integer_zero_node
))
8516 if (!(complain
& tf_error
))
8517 return error_mark_node
;
8519 error ("size of array %qD is negative", name
);
8521 error ("size of array is negative");
8522 size
= integer_one_node
;
8524 /* As an extension we allow zero-sized arrays. */
8525 else if (integer_zerop (size
))
8527 if (!(complain
& tf_error
))
8528 /* We must fail if performing argument deduction (as
8529 indicated by the state of complain), so that
8530 another substitution can be found. */
8531 return error_mark_node
;
8532 else if (in_system_header_at (input_location
))
8533 /* Allow them in system headers because glibc uses them. */;
8535 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8537 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8540 else if (TREE_CONSTANT (size
)
8541 /* We don't allow VLAs at non-function scopes, or during
8542 tentative template substitution. */
8543 || !at_function_scope_p ()
8544 || !(complain
& tf_error
))
8546 if (!(complain
& tf_error
))
8547 return error_mark_node
;
8548 /* `(int) &fn' is not a valid array bound. */
8550 error ("size of array %qD is not an integral constant-expression",
8553 error ("size of array is not an integral constant-expression");
8554 size
= integer_one_node
;
8556 else if (pedantic
&& warn_vla
!= 0)
8559 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8561 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8563 else if (warn_vla
> 0)
8567 "variable length array %qD is used", name
);
8570 "variable length array is used");
8573 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8574 /* A variable sized array. */
8575 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8578 HOST_WIDE_INT saved_processing_template_decl
;
8580 /* Compute the index of the largest element in the array. It is
8581 one less than the number of elements in the array. We save
8582 and restore PROCESSING_TEMPLATE_DECL so that computations in
8583 cp_build_binary_op will be appropriately folded. */
8584 saved_processing_template_decl
= processing_template_decl
;
8585 processing_template_decl
= 0;
8586 itype
= cp_build_binary_op (input_location
,
8588 cp_convert (ssizetype
, size
, complain
),
8589 cp_convert (ssizetype
, integer_one_node
,
8592 itype
= fold (itype
);
8593 processing_template_decl
= saved_processing_template_decl
;
8595 if (!TREE_CONSTANT (itype
))
8597 /* A variable sized array. */
8598 itype
= variable_size (itype
);
8600 if (TREE_CODE (itype
) != SAVE_EXPR
)
8602 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8603 they might survive till gimplification. */
8604 tree newitype
= itype
;
8606 cp_walk_tree_without_duplicates (&newitype
,
8607 fold_sizeof_expr_r
, &found
);
8609 itype
= variable_size (fold (newitype
));
8612 stabilize_vla_size (itype
);
8614 if (flag_sanitize
& SANITIZE_VLA
8615 && do_ubsan_in_current_function ())
8617 /* We have to add 1 -- in the ubsan routine we generate
8618 LE_EXPR rather than LT_EXPR. */
8619 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8620 build_one_cst (TREE_TYPE (itype
)));
8621 t
= ubsan_instrument_vla (input_location
, t
);
8622 finish_expr_stmt (t
);
8625 /* Make sure that there was no overflow when creating to a signed
8626 index type. (For example, on a 32-bit machine, an array with
8627 size 2^32 - 1 is too big.) */
8628 else if (TREE_CODE (itype
) == INTEGER_CST
8629 && TREE_OVERFLOW (itype
))
8631 if (!(complain
& tf_error
))
8632 return error_mark_node
;
8633 error ("overflow in array dimension");
8634 TREE_OVERFLOW (itype
) = 0;
8638 /* Create and return the appropriate index type. */
8639 itype
= build_index_type (itype
);
8641 /* If the index type were dependent, we would have returned early, so
8642 remember that it isn't. */
8643 TYPE_DEPENDENT_P (itype
) = 0;
8644 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8648 /* Returns the scope (if any) in which the entity declared by
8649 DECLARATOR will be located. If the entity was declared with an
8650 unqualified name, NULL_TREE is returned. */
8653 get_scope_of_declarator (const cp_declarator
*declarator
)
8655 while (declarator
&& declarator
->kind
!= cdk_id
)
8656 declarator
= declarator
->declarator
;
8658 /* If the declarator-id is a SCOPE_REF, the scope in which the
8659 declaration occurs is the first operand. */
8661 && declarator
->u
.id
.qualifying_scope
)
8662 return declarator
->u
.id
.qualifying_scope
;
8664 /* Otherwise, the declarator is not a qualified name; the entity will
8665 be declared in the current scope. */
8669 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8670 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8674 create_array_type_for_decl (tree name
, tree type
, tree size
)
8676 tree itype
= NULL_TREE
;
8678 /* If things have already gone awry, bail now. */
8679 if (type
== error_mark_node
|| size
== error_mark_node
)
8680 return error_mark_node
;
8682 /* 8.3.4/1: If the type of the identifier of D contains the auto
8683 type-specifier, the program is ill-formed. */
8684 if (type_uses_auto (type
))
8686 error ("%qD declared as array of %qT", name
, type
);
8687 return error_mark_node
;
8690 /* If there are some types which cannot be array elements,
8691 issue an error-message and return. */
8692 switch (TREE_CODE (type
))
8696 error ("declaration of %qD as array of void", name
);
8698 error ("creating array of void");
8699 return error_mark_node
;
8703 error ("declaration of %qD as array of functions", name
);
8705 error ("creating array of functions");
8706 return error_mark_node
;
8708 case REFERENCE_TYPE
:
8710 error ("declaration of %qD as array of references", name
);
8712 error ("creating array of references");
8713 return error_mark_node
;
8717 error ("declaration of %qD as array of function members", name
);
8719 error ("creating array of function members");
8720 return error_mark_node
;
8728 The constant expressions that specify the bounds of the arrays
8729 can be omitted only for the first member of the sequence. */
8730 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8733 error ("declaration of %qD as multidimensional array must "
8734 "have bounds for all dimensions except the first",
8737 error ("multidimensional array must have bounds for all "
8738 "dimensions except the first");
8740 return error_mark_node
;
8743 /* Figure out the index type for the array. */
8745 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8748 T is called the array element type; this type shall not be [...] an
8749 abstract class type. */
8750 abstract_virtuals_error (name
, type
);
8752 return build_cplus_array_type (type
, itype
);
8755 /* Check that it's OK to declare a function with the indicated TYPE.
8756 SFK indicates the kind of special function (if any) that this
8757 function is. OPTYPE is the type given in a conversion operator
8758 declaration, or the class type for a constructor/destructor.
8759 Returns the actual return type of the function; that
8760 may be different than TYPE if an error occurs, or for certain
8761 special functions. */
8764 check_special_function_return_type (special_function_kind sfk
,
8770 case sfk_constructor
:
8772 error ("return type specification for constructor invalid");
8774 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8775 type
= build_pointer_type (optype
);
8777 type
= void_type_node
;
8780 case sfk_destructor
:
8782 error ("return type specification for destructor invalid");
8783 /* We can't use the proper return type here because we run into
8784 problems with ambiguous bases and covariant returns.
8785 Java classes are left unchanged because (void *) isn't a valid
8786 Java type, and we don't want to change the Java ABI. */
8787 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8788 type
= build_pointer_type (void_type_node
);
8790 type
= void_type_node
;
8793 case sfk_conversion
:
8795 error ("return type specified for %<operator %T%>", optype
);
8806 /* A variable or data member (whose unqualified name is IDENTIFIER)
8807 has been declared with the indicated TYPE. If the TYPE is not
8808 acceptable, issue an error message and return a type to use for
8809 error-recovery purposes. */
8812 check_var_type (tree identifier
, tree type
)
8814 if (VOID_TYPE_P (type
))
8817 error ("unnamed variable or field declared void");
8818 else if (identifier_p (identifier
))
8820 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8821 error ("variable or field %qE declared void", identifier
);
8824 error ("variable or field declared void");
8825 type
= error_mark_node
;
8831 /* Given declspecs and a declarator (abstract or otherwise), determine
8832 the name and type of the object declared and construct a DECL node
8835 DECLSPECS points to the representation of declaration-specifier
8836 sequence that precedes declarator.
8838 DECL_CONTEXT says which syntactic context this declaration is in:
8839 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8840 FUNCDEF for a function definition. Like NORMAL but a few different
8841 error messages in each case. Return value may be zero meaning
8842 this definition is too screwy to try to parse.
8843 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8844 handle member functions (which have FIELD context).
8845 Return value may be zero meaning this definition is too screwy to
8847 PARM for a parameter declaration (either within a function prototype
8848 or before a function body). Make a PARM_DECL, or return void_type_node.
8849 TPARM for a template parameter declaration.
8850 CATCHPARM for a parameter declaration before a catch clause.
8851 TYPENAME if for a typename (in a cast or sizeof).
8852 Don't make a DECL node; just return the ..._TYPE node.
8853 FIELD for a struct or union field; make a FIELD_DECL.
8854 BITFIELD for a field with specified width.
8856 INITIALIZED is as for start_decl.
8858 ATTRLIST is a pointer to the list of attributes, which may be NULL
8859 if there are none; *ATTRLIST may be modified if attributes from inside
8860 the declarator should be applied to the declaration.
8862 When this function is called, scoping variables (such as
8863 CURRENT_CLASS_TYPE) should reflect the scope in which the
8864 declaration occurs, not the scope in which the new declaration will
8865 be placed. For example, on:
8869 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8872 Returns a DECL (if a declarator is present), a TYPE (if there is no
8873 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8877 grokdeclarator (const cp_declarator
*declarator
,
8878 cp_decl_specifier_seq
*declspecs
,
8879 enum decl_context decl_context
,
8883 tree type
= NULL_TREE
;
8885 int explicit_intN
= 0;
8886 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8887 int explicit_int
= 0;
8888 int explicit_char
= 0;
8889 int defaulted_int
= 0;
8891 tree typedef_decl
= NULL_TREE
;
8892 const char *name
= NULL
;
8893 tree typedef_type
= NULL_TREE
;
8894 /* True if this declarator is a function definition. */
8895 bool funcdef_flag
= false;
8896 cp_declarator_kind innermost_code
= cdk_error
;
8899 /* See the code below that used this. */
8900 tree decl_attr
= NULL_TREE
;
8903 /* Keep track of what sort of function is being processed
8904 so that we can warn about default return values, or explicit
8905 return values which do not match prescribed defaults. */
8906 special_function_kind sfk
= sfk_none
;
8908 tree dname
= NULL_TREE
;
8909 tree ctor_return_type
= NULL_TREE
;
8910 enum overload_flags flags
= NO_SPECIAL
;
8911 /* cv-qualifiers that apply to the declarator, for a declaration of
8912 a member function. */
8913 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8914 /* virt-specifiers that apply to the declarator, for a declaration of
8915 a member function. */
8916 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8917 /* ref-qualifier that applies to the declarator, for a declaration of
8918 a member function. */
8919 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8920 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8922 tree raises
= NULL_TREE
;
8923 int template_count
= 0;
8924 tree returned_attrs
= NULL_TREE
;
8925 tree parms
= NULL_TREE
;
8926 const cp_declarator
*id_declarator
;
8927 /* The unqualified name of the declarator; either an
8928 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8929 tree unqualified_id
;
8930 /* The class type, if any, in which this entity is located,
8931 or NULL_TREE if none. Note that this value may be different from
8932 the current class type; for example if an attempt is made to declare
8933 "A::f" inside "B", this value will be "A". */
8934 tree ctype
= current_class_type
;
8935 /* The NAMESPACE_DECL for the namespace in which this entity is
8936 located. If an unqualified name is used to declare the entity,
8937 this value will be NULL_TREE, even if the entity is located at
8939 tree in_namespace
= NULL_TREE
;
8940 cp_storage_class storage_class
;
8941 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8942 bool type_was_error_mark_node
= false;
8943 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8944 bool template_type_arg
= false;
8945 bool template_parm_flag
= false;
8946 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8947 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8948 bool late_return_type_p
= false;
8949 bool array_parameter_p
= false;
8950 source_location saved_loc
= input_location
;
8953 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8954 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8955 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8956 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8957 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8958 explicit_intN
= declspecs
->explicit_intN_p
;
8959 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8961 if (decl_context
== FUNCDEF
)
8962 funcdef_flag
= true, decl_context
= NORMAL
;
8963 else if (decl_context
== MEMFUNCDEF
)
8964 funcdef_flag
= true, decl_context
= FIELD
;
8965 else if (decl_context
== BITFIELD
)
8966 bitfield
= 1, decl_context
= FIELD
;
8967 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8968 template_type_arg
= true, decl_context
= TYPENAME
;
8969 else if (decl_context
== TPARM
)
8970 template_parm_flag
= true, decl_context
= PARM
;
8972 if (initialized
> 1)
8973 funcdef_flag
= true;
8975 /* Look inside a declarator for the name being declared
8976 and get it as a string, for an error message. */
8977 for (id_declarator
= declarator
;
8979 id_declarator
= id_declarator
->declarator
)
8981 if (id_declarator
->kind
!= cdk_id
)
8982 innermost_code
= id_declarator
->kind
;
8984 switch (id_declarator
->kind
)
8987 if (id_declarator
->declarator
8988 && id_declarator
->declarator
->kind
== cdk_id
)
8990 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8991 if (sfk
== sfk_destructor
)
8998 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8999 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9002 if (qualifying_scope
)
9004 if (at_function_scope_p ())
9008 A declarator-id shall not be qualified except
9011 None of the cases are permitted in block
9013 if (qualifying_scope
== global_namespace
)
9014 error ("invalid use of qualified-name %<::%D%>",
9016 else if (TYPE_P (qualifying_scope
))
9017 error ("invalid use of qualified-name %<%T::%D%>",
9018 qualifying_scope
, decl
);
9020 error ("invalid use of qualified-name %<%D::%D%>",
9021 qualifying_scope
, decl
);
9022 return error_mark_node
;
9024 else if (TYPE_P (qualifying_scope
))
9026 ctype
= qualifying_scope
;
9027 if (!MAYBE_CLASS_TYPE_P (ctype
))
9029 error ("%q#T is not a class or a namespace", ctype
);
9032 else if (innermost_code
!= cdk_function
9033 && current_class_type
9034 && !uniquely_derived_from_p (ctype
,
9035 current_class_type
))
9037 error ("invalid use of qualified-name %<%T::%D%>",
9038 qualifying_scope
, decl
);
9039 return error_mark_node
;
9042 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9043 in_namespace
= qualifying_scope
;
9045 switch (TREE_CODE (decl
))
9051 if (innermost_code
!= cdk_function
)
9053 error ("declaration of %qD as non-function", decl
);
9054 return error_mark_node
;
9056 else if (!qualifying_scope
9057 && !(current_class_type
&& at_class_scope_p ()))
9059 error ("declaration of %qD as non-member", decl
);
9060 return error_mark_node
;
9063 type
= TREE_OPERAND (decl
, 0);
9065 type
= constructor_name (type
);
9066 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9071 case TEMPLATE_ID_EXPR
:
9073 tree fns
= TREE_OPERAND (decl
, 0);
9076 if (!identifier_p (dname
))
9078 if (variable_template_p (dname
))
9079 dname
= DECL_NAME (dname
);
9082 gcc_assert (is_overloaded_fn (dname
));
9083 dname
= DECL_NAME (get_first_fn (dname
));
9089 case IDENTIFIER_NODE
:
9090 if (identifier_p (decl
))
9093 if (C_IS_RESERVED_WORD (dname
))
9095 error ("declarator-id missing; using reserved word %qD",
9097 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9099 else if (!IDENTIFIER_TYPENAME_P (dname
))
9100 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9103 gcc_assert (flags
== NO_SPECIAL
);
9104 flags
= TYPENAME_FLAG
;
9105 ctor_return_type
= TREE_TYPE (dname
);
9106 sfk
= sfk_conversion
;
9107 if (is_typename_at_global_scope (dname
))
9108 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9110 name
= "<invalid operator>";
9127 return error_mark_node
;
9132 if (id_declarator
->kind
== cdk_id
)
9138 The declarator in a function-definition shall have the form
9139 D1 ( parameter-declaration-clause) ... */
9140 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9142 error ("function definition does not declare parameters");
9143 return error_mark_node
;
9146 if (flags
== TYPENAME_FLAG
9147 && innermost_code
!= cdk_function
9148 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9150 error ("declaration of %qD as non-function", dname
);
9151 return error_mark_node
;
9155 && identifier_p (dname
)
9156 && UDLIT_OPER_P (dname
)
9157 && innermost_code
!= cdk_function
)
9159 error ("declaration of %qD as non-function", dname
);
9160 return error_mark_node
;
9163 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9167 error ("declaration of %qD as %<typedef%>", dname
);
9168 return error_mark_node
;
9170 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9172 error ("declaration of %qD as parameter", dname
);
9173 return error_mark_node
;
9177 /* Anything declared one level down from the top level
9178 must be one of the parameters of a function
9179 (because the body is at least two levels down). */
9181 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9182 by not allowing C++ class definitions to specify their parameters
9183 with xdecls (must be spec.d in the parmlist).
9185 Since we now wait to push a class scope until we are sure that
9186 we are in a legitimate method context, we must set oldcname
9187 explicitly (since current_class_name is not yet alive).
9189 We also want to avoid calling this a PARM if it is in a namespace. */
9191 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9193 cp_binding_level
*b
= current_binding_level
;
9194 current_binding_level
= b
->level_chain
;
9195 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9196 decl_context
= PARM
;
9197 current_binding_level
= b
;
9201 name
= decl_context
== PARM
? "parameter" : "type name";
9203 if (constexpr_p
&& typedef_p
)
9205 error ("%<constexpr%> cannot appear in a typedef declaration");
9206 return error_mark_node
;
9209 /* If there were multiple types specified in the decl-specifier-seq,
9210 issue an error message. */
9211 if (declspecs
->multiple_types_p
)
9213 error ("two or more data types in declaration of %qs", name
);
9214 return error_mark_node
;
9217 if (declspecs
->conflicting_specifiers_p
)
9219 error ("conflicting specifiers in declaration of %qs", name
);
9220 return error_mark_node
;
9223 /* Extract the basic type from the decl-specifier-seq. */
9224 type
= declspecs
->type
;
9225 if (type
== error_mark_node
)
9228 type_was_error_mark_node
= true;
9230 /* If the entire declaration is itself tagged as deprecated then
9231 suppress reports of deprecated items. */
9232 if (type
&& TREE_DEPRECATED (type
)
9233 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9234 warn_deprecated_use (type
, NULL_TREE
);
9235 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9237 typedef_decl
= type
;
9238 type
= TREE_TYPE (typedef_decl
);
9239 if (TREE_DEPRECATED (type
)
9240 && DECL_ARTIFICIAL (typedef_decl
)
9241 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9242 warn_deprecated_use (type
, NULL_TREE
);
9244 /* No type at all: default to `int', and set DEFAULTED_INT
9245 because it was not a user-defined typedef. */
9246 if (type
== NULL_TREE
)
9248 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9250 /* These imply 'int'. */
9251 type
= integer_type_node
;
9254 /* If we just have "complex", it is equivalent to "complex double". */
9255 else if (!longlong
&& !explicit_intN
9256 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9258 type
= double_type_node
;
9259 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9260 "ISO C++ does not support plain %<complex%> meaning "
9261 "%<double complex%>");
9265 explicit_int
= declspecs
->explicit_int_p
;
9266 explicit_char
= declspecs
->explicit_char_p
;
9269 /* See the code below that used this. */
9271 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9273 typedef_type
= type
;
9276 if (sfk
!= sfk_conversion
)
9277 ctor_return_type
= ctype
;
9279 if (sfk
!= sfk_none
)
9280 type
= check_special_function_return_type (sfk
, type
,
9282 else if (type
== NULL_TREE
)
9288 /* We handle `main' specially here, because 'main () { }' is so
9289 common. With no options, it is allowed. With -Wreturn-type,
9290 it is a warning. It is only an error with -pedantic-errors. */
9291 is_main
= (funcdef_flag
9292 && dname
&& identifier_p (dname
)
9293 && MAIN_NAME_P (dname
)
9294 && ctype
== NULL_TREE
9295 && in_namespace
== NULL_TREE
9296 && current_namespace
== global_namespace
);
9298 if (type_was_error_mark_node
)
9299 /* We've already issued an error, don't complain more. */;
9300 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9301 /* Allow it, sigh. */;
9303 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9305 pedwarn (input_location
, OPT_Wpedantic
,
9306 "ISO C++ forbids declaration of %qs with no type", name
);
9308 warning (OPT_Wreturn_type
,
9309 "ISO C++ forbids declaration of %qs with no type", name
);
9311 type
= integer_type_node
;
9318 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9320 error ("%<__int%d%> is not supported by this target",
9321 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9322 explicit_intN
= false;
9324 else if (pedantic
&& ! in_system_header_at (input_location
))
9325 pedwarn (input_location
, OPT_Wpedantic
,
9326 "ISO C++ does not support %<__int%d%> for %qs",
9327 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9330 /* Now process the modifiers that were specified
9331 and check for invalid combinations. */
9333 /* Long double is a special combination. */
9334 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9337 type
= cp_build_qualified_type (long_double_type_node
,
9338 cp_type_quals (type
));
9341 /* Check all other uses of type modifiers. */
9343 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9347 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9348 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9349 else if (signed_p
&& unsigned_p
)
9350 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9351 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9352 error ("%<long long%> invalid for %qs", name
);
9353 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9354 error ("%<long%> invalid for %qs", name
);
9355 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9356 error ("%<short%> invalid for %qs", name
);
9357 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9358 error ("%<long%> or %<short%> invalid for %qs", name
);
9359 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9360 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9361 else if ((long_p
|| short_p
) && explicit_char
)
9362 error ("%<long%> or %<short%> specified with char for %qs", name
);
9363 else if (long_p
&& short_p
)
9364 error ("%<long%> and %<short%> specified together for %qs", name
);
9365 else if (type
== char16_type_node
|| type
== char32_type_node
)
9367 if (signed_p
|| unsigned_p
)
9368 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9369 else if (short_p
|| long_p
)
9370 error ("%<short%> or %<long%> invalid for %qs", name
);
9375 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9377 pedwarn (input_location
, OPT_Wpedantic
,
9378 "long, short, signed or unsigned used invalidly for %qs",
9380 if (flag_pedantic_errors
)
9385 /* Discard the type modifiers if they are invalid. */
9396 /* Decide whether an integer type is signed or not.
9397 Optionally treat bitfields as signed by default. */
9401 It is implementation-defined whether a plain (neither
9402 explicitly signed or unsigned) char, short, int, or long
9403 bit-field is signed or unsigned.
9405 Naturally, we extend this to long long as well. Note that
9406 this does not include wchar_t. */
9407 || (bitfield
&& !flag_signed_bitfields
9409 /* A typedef for plain `int' without `signed' can be
9410 controlled just like plain `int', but a typedef for
9411 `signed int' cannot be so controlled. */
9413 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9414 && TREE_CODE (type
) == INTEGER_TYPE
9415 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9418 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9420 type
= long_long_unsigned_type_node
;
9422 type
= long_unsigned_type_node
;
9424 type
= short_unsigned_type_node
;
9425 else if (type
== char_type_node
)
9426 type
= unsigned_char_type_node
;
9427 else if (typedef_decl
)
9428 type
= unsigned_type_for (type
);
9430 type
= unsigned_type_node
;
9432 else if (signed_p
&& type
== char_type_node
)
9433 type
= signed_char_type_node
;
9434 else if (explicit_intN
)
9435 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9437 type
= long_long_integer_type_node
;
9439 type
= long_integer_type_node
;
9441 type
= short_integer_type_node
;
9443 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9445 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9446 error ("complex invalid for %qs", name
);
9447 /* If a modifier is specified, the resulting complex is the complex
9448 form of TYPE. E.g, "complex short" is "complex short int". */
9449 else if (type
== integer_type_node
)
9450 type
= complex_integer_type_node
;
9451 else if (type
== float_type_node
)
9452 type
= complex_float_type_node
;
9453 else if (type
== double_type_node
)
9454 type
= complex_double_type_node
;
9455 else if (type
== long_double_type_node
)
9456 type
= complex_long_double_type_node
;
9458 type
= build_complex_type (type
);
9461 type_quals
= TYPE_UNQUALIFIED
;
9462 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9463 type_quals
|= TYPE_QUAL_CONST
;
9464 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9465 type_quals
|= TYPE_QUAL_VOLATILE
;
9466 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9467 type_quals
|= TYPE_QUAL_RESTRICT
;
9468 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9469 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9472 /* If we're using the injected-class-name to form a compound type or a
9473 declaration, replace it with the underlying class so we don't get
9474 redundant typedefs in the debug output. But if we are returning the
9475 type unchanged, leave it alone so that it's available to
9476 maybe_get_template_decl_from_type_decl. */
9477 if (CLASS_TYPE_P (type
)
9478 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9479 && type
== TREE_TYPE (TYPE_NAME (type
))
9480 && (declarator
|| type_quals
))
9481 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9483 type_quals
|= cp_type_quals (type
);
9484 type
= cp_build_qualified_type_real
9485 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9486 || declspecs
->decltype_p
)
9487 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9488 /* We might have ignored or rejected some of the qualifiers. */
9489 type_quals
= cp_type_quals (type
);
9492 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9493 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9494 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9496 storage_class
= declspecs
->storage_class
;
9497 if (storage_class
== sc_static
)
9498 staticp
= 1 + (decl_context
== FIELD
);
9500 if (virtualp
&& staticp
== 2)
9502 error ("member %qD cannot be declared both virtual and static", dname
);
9503 storage_class
= sc_none
;
9506 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9508 /* Issue errors about use of storage classes for parameters. */
9509 if (decl_context
== PARM
)
9513 error ("typedef declaration invalid in parameter declaration");
9514 return error_mark_node
;
9516 else if (template_parm_flag
&& storage_class
!= sc_none
)
9518 error ("storage class specified for template parameter %qs", name
);
9519 return error_mark_node
;
9521 else if (storage_class
== sc_static
9522 || storage_class
== sc_extern
9524 error ("storage class specifiers invalid in parameter declarations");
9526 /* Function parameters cannot be constexpr. If we saw one, moan
9527 and pretend it wasn't there. */
9530 error ("a parameter cannot be declared %<constexpr%>");
9535 /* Give error if `virtual' is used outside of class declaration. */
9537 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9539 error ("%<virtual%> outside class declaration");
9543 /* Static anonymous unions are dealt with here. */
9544 if (staticp
&& decl_context
== TYPENAME
9546 && ANON_AGGR_TYPE_P (declspecs
->type
))
9547 decl_context
= FIELD
;
9549 /* Warn about storage classes that are invalid for certain
9550 kinds of declarations (parameters, typenames, etc.). */
9553 && storage_class
!= sc_extern
9554 && storage_class
!= sc_static
)
9557 error ("multiple storage classes in declaration of %qs", name
);
9560 if (decl_context
!= NORMAL
9561 && ((storage_class
!= sc_none
9562 && storage_class
!= sc_mutable
)
9565 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9566 && (storage_class
== sc_register
9567 || storage_class
== sc_auto
))
9571 else if (decl_context
== FIELD
9572 /* C++ allows static class elements. */
9573 && storage_class
== sc_static
)
9574 /* C++ also allows inlines and signed and unsigned elements,
9575 but in those cases we don't come in here. */
9579 if (decl_context
== FIELD
)
9580 error ("storage class specified for %qs", name
);
9583 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9584 error ("storage class specified for parameter %qs", name
);
9586 error ("storage class specified for typename");
9588 if (storage_class
== sc_register
9589 || storage_class
== sc_auto
9590 || storage_class
== sc_extern
9592 storage_class
= sc_none
;
9595 else if (storage_class
== sc_extern
&& funcdef_flag
9596 && ! toplevel_bindings_p ())
9597 error ("nested function %qs declared %<extern%>", name
);
9598 else if (toplevel_bindings_p ())
9600 if (storage_class
== sc_auto
)
9601 error ("top-level declaration of %qs specifies %<auto%>", name
);
9604 && storage_class
!= sc_extern
9605 && storage_class
!= sc_static
)
9607 if (declspecs
->gnu_thread_keyword_p
)
9608 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9609 "declared %<__thread%>", name
);
9611 /* When thread_local is applied to a variable of block scope the
9612 storage-class-specifier static is implied if it does not appear
9614 storage_class
= declspecs
->storage_class
= sc_static
;
9618 if (storage_class
&& friendp
)
9620 error ("storage class specifiers invalid in friend function declarations");
9621 storage_class
= sc_none
;
9626 unqualified_id
= NULL_TREE
;
9629 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9630 switch (TREE_CODE (unqualified_id
))
9633 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9634 if (TYPE_P (unqualified_id
))
9635 unqualified_id
= constructor_name (unqualified_id
);
9638 case IDENTIFIER_NODE
:
9639 case TEMPLATE_ID_EXPR
:
9647 if (declspecs
->std_attributes
)
9649 /* Apply the c++11 attributes to the type preceding them. */
9650 input_location
= declspecs
->locations
[ds_std_attribute
];
9651 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9652 input_location
= saved_loc
;
9655 /* Determine the type of the entity declared by recurring on the
9657 for (; declarator
; declarator
= declarator
->declarator
)
9659 const cp_declarator
*inner_declarator
;
9662 if (type
== error_mark_node
)
9663 return error_mark_node
;
9665 attrs
= declarator
->attributes
;
9671 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9672 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9673 if (declarator
->kind
== cdk_function
)
9674 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9675 if (declarator
->kind
== cdk_array
)
9676 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9677 returned_attrs
= decl_attributes (&type
,
9678 chainon (returned_attrs
, attrs
),
9682 if (declarator
->kind
== cdk_id
)
9685 inner_declarator
= declarator
->declarator
;
9687 switch (declarator
->kind
)
9690 type
= create_array_type_for_decl (dname
, type
,
9691 declarator
->u
.array
.bounds
);
9692 if (declarator
->std_attributes
)
9695 The optional attribute-specifier-seq appertains to the
9697 returned_attrs
= chainon (returned_attrs
,
9698 declarator
->std_attributes
);
9706 /* Declaring a function type.
9707 Make sure we have a valid type for the function to return. */
9709 if (type_quals
!= TYPE_UNQUALIFIED
)
9711 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9712 warning (OPT_Wignored_qualifiers
,
9713 "type qualifiers ignored on function return type");
9714 /* We now know that the TYPE_QUALS don't apply to the
9715 decl, but to its return type. */
9716 type_quals
= TYPE_UNQUALIFIED
;
9718 errmsg
= targetm
.invalid_return_type (type
);
9722 type
= integer_type_node
;
9725 /* Error about some types functions can't return. */
9727 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9729 error ("%qs declared as function returning a function", name
);
9730 return error_mark_node
;
9732 if (TREE_CODE (type
) == ARRAY_TYPE
)
9734 error ("%qs declared as function returning an array", name
);
9735 return error_mark_node
;
9738 input_location
= declspecs
->locations
[ds_type_spec
];
9739 abstract_virtuals_error (ACU_RETURN
, type
);
9740 input_location
= saved_loc
;
9742 /* Pick up type qualifiers which should be applied to `this'. */
9743 memfn_quals
= declarator
->u
.function
.qualifiers
;
9744 /* Pick up virt-specifiers. */
9745 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9746 /* And ref-qualifier, too */
9747 rqual
= declarator
->u
.function
.ref_qualifier
;
9748 /* Pick up the exception specifications. */
9749 raises
= declarator
->u
.function
.exception_specification
;
9750 /* If the exception-specification is ill-formed, let's pretend
9751 there wasn't one. */
9752 if (raises
== error_mark_node
)
9755 /* Say it's a definition only for the CALL_EXPR
9756 closest to the identifier. */
9757 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9759 /* Handle a late-specified return type. */
9762 if (type_uses_auto (type
))
9764 if (!declarator
->u
.function
.late_return_type
)
9766 if (current_class_type
9767 && LAMBDA_TYPE_P (current_class_type
))
9768 /* OK for C++11 lambdas. */;
9769 else if (cxx_dialect
< cxx14
)
9771 error ("%qs function uses "
9772 "%<auto%> type specifier without trailing "
9773 "return type", name
);
9774 inform (input_location
, "deduced return type "
9775 "only available with -std=c++14 or "
9780 error ("virtual function cannot "
9781 "have deduced return type");
9785 else if (!is_auto (type
))
9787 error ("%qs function with trailing return type has"
9788 " %qT as its type rather than plain %<auto%>",
9790 return error_mark_node
;
9793 else if (declarator
->u
.function
.late_return_type
)
9795 if (cxx_dialect
< cxx11
)
9796 /* Not using maybe_warn_cpp0x because this should
9797 always be an error. */
9798 error ("trailing return type only available with "
9799 "-std=c++11 or -std=gnu++11");
9801 error ("%qs function with trailing return type not "
9802 "declared with %<auto%> type specifier", name
);
9803 return error_mark_node
;
9806 type
= splice_late_return_type
9807 (type
, declarator
->u
.function
.late_return_type
);
9808 if (type
== error_mark_node
)
9809 return error_mark_node
;
9811 if (declarator
->u
.function
.late_return_type
)
9812 late_return_type_p
= true;
9814 if (ctype
== NULL_TREE
9815 && decl_context
== FIELD
9818 ctype
= current_class_type
;
9820 if (ctype
&& (sfk
== sfk_constructor
9821 || sfk
== sfk_destructor
))
9823 /* We are within a class's scope. If our declarator name
9824 is the same as the class name, and we are defining
9825 a function, then it is a constructor/destructor, and
9826 therefore returns a void type. */
9828 /* ISO C++ 12.4/2. A destructor may not be declared
9829 const or volatile. A destructor may not be static.
9830 A destructor may not be declared with ref-qualifier.
9832 ISO C++ 12.1. A constructor may not be declared
9833 const or volatile. A constructor may not be
9834 virtual. A constructor may not be static.
9835 A constructor may not be declared with ref-qualifier. */
9837 error ((flags
== DTOR_FLAG
)
9838 ? G_("destructor cannot be static member function")
9839 : G_("constructor cannot be static member function"));
9842 error ((flags
== DTOR_FLAG
)
9843 ? G_("destructors may not be cv-qualified")
9844 : G_("constructors may not be cv-qualified"));
9845 memfn_quals
= TYPE_UNQUALIFIED
;
9850 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9851 error ((flags
== DTOR_FLAG
)
9852 ? "destructors may not be ref-qualified"
9853 : "constructors may not be ref-qualified");
9854 rqual
= REF_QUAL_NONE
;
9857 if (decl_context
== FIELD
9858 && !member_function_or_else (ctype
,
9861 return error_mark_node
;
9863 if (flags
!= DTOR_FLAG
)
9865 /* It's a constructor. */
9870 permerror (input_location
, "constructors cannot be declared virtual");
9873 if (decl_context
== FIELD
9874 && sfk
!= sfk_constructor
)
9875 return error_mark_node
;
9877 if (decl_context
== FIELD
)
9884 /* Cannot be both friend and virtual. */
9885 error ("virtual functions cannot be friends");
9888 if (decl_context
== NORMAL
)
9889 error ("friend declaration not in class definition");
9890 if (current_function_decl
&& funcdef_flag
)
9891 error ("can%'t define friend function %qs in a local "
9895 else if (ctype
&& sfk
== sfk_conversion
)
9899 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9904 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9907 if (inner_declarator
9908 && inner_declarator
->kind
== cdk_id
9909 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9910 && arg_types
!= void_list_node
)
9912 error ("destructors may not have parameters");
9913 arg_types
= void_list_node
;
9917 type
= build_function_type (type
, arg_types
);
9918 if (declarator
->std_attributes
)
9921 The optional attribute-specifier-seq appertains to
9922 the function type. */
9923 decl_attributes (&type
, declarator
->std_attributes
,
9931 /* Filter out pointers-to-references and references-to-references.
9932 We can get these if a TYPE_DECL is used. */
9934 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9936 if (declarator
->kind
!= cdk_reference
)
9938 error ("cannot declare pointer to %q#T", type
);
9939 type
= TREE_TYPE (type
);
9942 /* In C++0x, we allow reference to reference declarations
9943 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9944 and template type arguments [14.3.1/4 temp.arg.type]. The
9945 check for direct reference to reference declarations, which
9946 are still forbidden, occurs below. Reasoning behind the change
9947 can be found in DR106, DR540, and the rvalue reference
9949 else if (cxx_dialect
== cxx98
)
9951 error ("cannot declare reference to %q#T", type
);
9952 type
= TREE_TYPE (type
);
9955 else if (VOID_TYPE_P (type
))
9957 if (declarator
->kind
== cdk_reference
)
9958 error ("cannot declare reference to %q#T", type
);
9959 else if (declarator
->kind
== cdk_ptrmem
)
9960 error ("cannot declare pointer to %q#T member", type
);
9963 /* We now know that the TYPE_QUALS don't apply to the decl,
9964 but to the target of the pointer. */
9965 type_quals
= TYPE_UNQUALIFIED
;
9967 /* This code used to handle METHOD_TYPE, but I don't think it's
9968 possible to get it here anymore. */
9969 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9970 if (declarator
->kind
== cdk_ptrmem
9971 && TREE_CODE (type
) == FUNCTION_TYPE
)
9973 memfn_quals
|= type_memfn_quals (type
);
9974 type
= build_memfn_type (type
,
9975 declarator
->u
.pointer
.class_type
,
9978 if (type
== error_mark_node
)
9979 return error_mark_node
;
9981 rqual
= REF_QUAL_NONE
;
9982 memfn_quals
= TYPE_UNQUALIFIED
;
9985 if (TREE_CODE (type
) == FUNCTION_TYPE
9986 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9987 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9988 error (declarator
->kind
== cdk_reference
9989 ? G_("cannot declare reference to qualified function type %qT")
9990 : G_("cannot declare pointer to qualified function type %qT"),
9993 /* When the pointed-to type involves components of variable size,
9994 care must be taken to ensure that the size evaluation code is
9995 emitted early enough to dominate all the possible later uses
9996 and late enough for the variables on which it depends to have
9999 This is expected to happen automatically when the pointed-to
10000 type has a name/declaration of it's own, but special attention
10001 is required if the type is anonymous.
10003 We handle the NORMAL and FIELD contexts here by inserting a
10004 dummy statement that just evaluates the size at a safe point
10005 and ensures it is not deferred until e.g. within a deeper
10006 conditional context (c++/43555).
10008 We expect nothing to be needed here for PARM or TYPENAME.
10009 Evaluating the size at this point for TYPENAME would
10010 actually be incorrect, as we might be in the middle of an
10011 expression with side effects on the pointed-to type size
10012 "arguments" prior to the pointer declaration point and the
10013 size evaluation could end up prior to the side effects. */
10015 if (!TYPE_NAME (type
)
10016 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10017 && at_function_scope_p ()
10018 && variably_modified_type_p (type
, NULL_TREE
))
10019 /* Force evaluation of the SAVE_EXPR. */
10020 finish_expr_stmt (TYPE_SIZE (type
));
10022 if (declarator
->kind
== cdk_reference
)
10024 /* In C++0x, the type we are creating a reference to might be
10025 a typedef which is itself a reference type. In that case,
10026 we follow the reference collapsing rules in
10027 [7.1.3/8 dcl.typedef] to create the final reference type:
10029 "If a typedef TD names a type that is a reference to a type
10030 T, an attempt to create the type 'lvalue reference to cv TD'
10031 creates the type 'lvalue reference to T,' while an attempt
10032 to create the type "rvalue reference to cv TD' creates the
10035 if (VOID_TYPE_P (type
))
10036 /* We already gave an error. */;
10037 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10039 if (declarator
->u
.reference
.rvalue_ref
)
10040 /* Leave type alone. */;
10042 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10045 type
= cp_build_reference_type
10046 (type
, declarator
->u
.reference
.rvalue_ref
);
10048 /* In C++0x, we need this check for direct reference to
10049 reference declarations, which are forbidden by
10050 [8.3.2/5 dcl.ref]. Reference to reference declarations
10051 are only allowed indirectly through typedefs and template
10052 type arguments. Example:
10054 void foo(int & &); // invalid ref-to-ref decl
10056 typedef int & int_ref;
10057 void foo(int_ref &); // valid ref-to-ref decl
10059 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10060 error ("cannot declare reference to %q#T, which is not "
10061 "a typedef or a template type argument", type
);
10063 else if (TREE_CODE (type
) == METHOD_TYPE
)
10064 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10065 else if (declarator
->kind
== cdk_ptrmem
)
10067 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10068 != NAMESPACE_DECL
);
10069 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10070 /* We will already have complained. */
10071 type
= error_mark_node
;
10073 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10077 type
= build_pointer_type (type
);
10079 /* Process a list of type modifier keywords (such as
10080 const or volatile) that were given inside the `*' or `&'. */
10082 if (declarator
->u
.pointer
.qualifiers
)
10085 = cp_build_qualified_type (type
,
10086 declarator
->u
.pointer
.qualifiers
);
10087 type_quals
= cp_type_quals (type
);
10090 /* Apply C++11 attributes to the pointer, and not to the
10091 type pointed to. This is unlike what is done for GNU
10092 attributes above. It is to comply with [dcl.ptr]/1:
10094 [the optional attribute-specifier-seq (7.6.1) appertains
10095 to the pointer and not to the object pointed to]. */
10096 if (declarator
->std_attributes
)
10097 decl_attributes (&type
, declarator
->std_attributes
,
10107 gcc_unreachable ();
10111 /* A `constexpr' specifier used in an object declaration declares
10112 the object as `const'. */
10113 if (constexpr_p
&& innermost_code
!= cdk_function
)
10115 /* DR1688 says that a `constexpr' specifier in combination with
10116 `volatile' is valid. */
10118 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10120 type_quals
|= TYPE_QUAL_CONST
;
10121 type
= cp_build_qualified_type (type
, type_quals
);
10125 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10126 && TREE_CODE (type
) != FUNCTION_TYPE
10127 && TREE_CODE (type
) != METHOD_TYPE
10128 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10130 error ("template-id %qD used as a declarator",
10132 unqualified_id
= dname
;
10135 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10136 qualified with a class-name, turn it into a METHOD_TYPE, unless
10137 we know that the function is static. We take advantage of this
10138 opportunity to do other processing that pertains to entities
10139 explicitly declared to be class members. Note that if DECLARATOR
10140 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10141 would not have exited the loop above. */
10143 && declarator
->u
.id
.qualifying_scope
10144 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10146 ctype
= declarator
->u
.id
.qualifying_scope
;
10147 ctype
= TYPE_MAIN_VARIANT (ctype
);
10148 template_count
= num_template_headers_for_class (ctype
);
10150 if (ctype
== current_class_type
)
10154 permerror (input_location
, "member functions are implicitly friends of their class");
10158 permerror (declarator
->id_loc
,
10159 "extra qualification %<%T::%> on member %qs",
10162 else if (/* If the qualifying type is already complete, then we
10163 can skip the following checks. */
10164 !COMPLETE_TYPE_P (ctype
)
10165 && (/* If the function is being defined, then
10166 qualifying type must certainly be complete. */
10168 /* A friend declaration of "T::f" is OK, even if
10169 "T" is a template parameter. But, if this
10170 function is not a friend, the qualifying type
10171 must be a class. */
10172 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10173 /* For a declaration, the type need not be
10174 complete, if either it is dependent (since there
10175 is no meaningful definition of complete in that
10176 case) or the qualifying class is currently being
10178 || !(dependent_type_p (ctype
)
10179 || currently_open_class (ctype
)))
10180 /* Check that the qualifying type is complete. */
10181 && !complete_type_or_else (ctype
, NULL_TREE
))
10182 return error_mark_node
;
10183 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10185 if (current_class_type
10186 && (!friendp
|| funcdef_flag
))
10188 error (funcdef_flag
10189 ? G_("cannot define member function %<%T::%s%> "
10191 : G_("cannot declare member function %<%T::%s%> "
10193 ctype
, name
, current_class_type
);
10194 return error_mark_node
;
10197 else if (typedef_p
&& current_class_type
)
10199 error ("cannot declare member %<%T::%s%> within %qT",
10200 ctype
, name
, current_class_type
);
10201 return error_mark_node
;
10205 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10206 ctype
= current_class_type
;
10208 /* Now TYPE has the actual type. */
10210 if (returned_attrs
)
10213 *attrlist
= chainon (returned_attrs
, *attrlist
);
10215 attrlist
= &returned_attrs
;
10219 && declarator
->kind
== cdk_id
10220 && declarator
->std_attributes
)
10221 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10222 a declarator-id appertains to the entity that is declared. */
10223 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10225 /* Handle parameter packs. */
10226 if (parameter_pack_p
)
10228 if (decl_context
== PARM
)
10229 /* Turn the type into a pack expansion.*/
10230 type
= make_pack_expansion (type
);
10232 error ("non-parameter %qs cannot be a parameter pack", name
);
10235 /* Did array size calculations overflow or does the array cover more
10236 than half of the address-space? */
10237 if (TREE_CODE (type
) == ARRAY_TYPE
10238 && COMPLETE_TYPE_P (type
)
10239 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10240 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10242 error ("size of array %qs is too large", name
);
10243 /* If we proceed with the array type as it is, we'll eventually
10244 crash in tree_to_[su]hwi(). */
10245 type
= error_mark_node
;
10248 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10249 && !processing_template_decl
10250 && variably_modified_type_p (type
, NULL_TREE
))
10252 if (decl_context
== FIELD
)
10253 error ("data member may not have variably modified type %qT", type
);
10255 error ("parameter may not have variably modified type %qT", type
);
10256 type
= error_mark_node
;
10259 if (explicitp
== 1 || (explicitp
&& friendp
))
10261 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10262 in the declaration of a constructor or conversion function within
10263 a class definition. */
10264 if (!current_class_type
)
10265 error ("%<explicit%> outside class declaration");
10267 error ("%<explicit%> in friend declaration");
10269 error ("only declarations of constructors and conversion operators "
10270 "can be %<explicit%>");
10274 if (storage_class
== sc_mutable
)
10276 if (decl_context
!= FIELD
|| friendp
)
10278 error ("non-member %qs cannot be declared %<mutable%>", name
);
10279 storage_class
= sc_none
;
10281 else if (decl_context
== TYPENAME
|| typedef_p
)
10283 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10284 storage_class
= sc_none
;
10286 else if (TREE_CODE (type
) == FUNCTION_TYPE
10287 || TREE_CODE (type
) == METHOD_TYPE
)
10289 error ("function %qs cannot be declared %<mutable%>", name
);
10290 storage_class
= sc_none
;
10294 error ("static %qs cannot be declared %<mutable%>", name
);
10295 storage_class
= sc_none
;
10297 else if (type_quals
& TYPE_QUAL_CONST
)
10299 error ("const %qs cannot be declared %<mutable%>", name
);
10300 storage_class
= sc_none
;
10302 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10304 permerror (input_location
, "reference %qs cannot be declared "
10305 "%<mutable%>", name
);
10306 storage_class
= sc_none
;
10310 /* If this is declaring a typedef name, return a TYPE_DECL. */
10311 if (typedef_p
&& decl_context
!= TYPENAME
)
10315 /* Note that the grammar rejects storage classes
10316 in typenames, fields or parameters. */
10317 if (current_lang_name
== lang_name_java
)
10318 TYPE_FOR_JAVA (type
) = 1;
10320 /* This declaration:
10322 typedef void f(int) const;
10324 declares a function type which is not a member of any
10325 particular class, but which is cv-qualified; for
10326 example "f S::*" declares a pointer to a const-qualified
10327 member function of S. We record the cv-qualification in the
10329 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10331 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10333 /* We have now dealt with these qualifiers. */
10334 memfn_quals
= TYPE_UNQUALIFIED
;
10335 rqual
= REF_QUAL_NONE
;
10338 if (type_uses_auto (type
))
10340 error ("typedef declared %<auto%>");
10341 type
= error_mark_node
;
10344 if (decl_context
== FIELD
)
10345 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10347 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10348 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10349 error_at (DECL_SOURCE_LOCATION (decl
),
10350 "typedef name may not be a nested-name-specifier");
10351 TREE_TYPE (decl
) = error_mark_node
;
10354 if (decl_context
!= FIELD
)
10356 if (!current_function_decl
)
10357 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10358 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10359 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10360 (current_function_decl
)))
10361 /* The TYPE_DECL is "abstract" because there will be
10362 clones of this constructor/destructor, and there will
10363 be copies of this TYPE_DECL generated in those
10364 clones. The decloning optimization (for space) may
10365 revert this subsequently if it determines that
10366 the clones should share a common implementation. */
10367 DECL_ABSTRACT_P (decl
) = true;
10369 else if (current_class_type
10370 && constructor_name_p (unqualified_id
, current_class_type
))
10371 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10372 "as enclosing class",
10375 /* If the user declares "typedef struct {...} foo" then the
10376 struct will have an anonymous name. Fill that name in now.
10377 Nothing can refer to it, so nothing needs know about the name
10379 if (type
!= error_mark_node
10381 && TYPE_NAME (type
)
10382 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10383 && TYPE_ANONYMOUS_P (type
)
10384 && declspecs
->type_definition_p
10385 && attributes_naming_typedef_ok (*attrlist
)
10386 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10390 /* Replace the anonymous name with the real name everywhere. */
10391 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10393 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10394 /* We do not rename the debug info representing the
10395 anonymous tagged type because the standard says in
10396 [dcl.typedef] that the naming applies only for
10397 linkage purposes. */
10398 /*debug_hooks->set_name (t, decl);*/
10399 TYPE_NAME (t
) = decl
;
10402 if (TYPE_LANG_SPECIFIC (type
))
10403 TYPE_WAS_ANONYMOUS (type
) = 1;
10405 /* If this is a typedef within a template class, the nested
10406 type is a (non-primary) template. The name for the
10407 template needs updating as well. */
10408 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10409 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10410 = TYPE_IDENTIFIER (type
);
10412 /* Adjust linkage now that we aren't anonymous anymore. */
10413 reset_type_linkage (type
);
10415 /* FIXME remangle member functions; member functions of a
10416 type with external linkage have external linkage. */
10420 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10421 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10423 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10424 memfn_quals
!= TYPE_UNQUALIFIED
,
10425 inlinep
, friendp
, raises
!= NULL_TREE
);
10427 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10428 /* Acknowledge that this was written:
10429 `using analias = atype;'. */
10430 TYPE_DECL_ALIAS_P (decl
) = 1;
10435 /* Detect the case of an array type of unspecified size
10436 which came, as such, direct from a typedef name.
10437 We must copy the type, so that the array's domain can be
10438 individually set by the object's initializer. */
10440 if (type
&& typedef_type
10441 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10442 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10443 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10445 /* Detect where we're using a typedef of function type to declare a
10446 function. PARMS will not be set, so we must create it now. */
10448 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10450 tree decls
= NULL_TREE
;
10453 for (args
= TYPE_ARG_TYPES (type
);
10454 args
&& args
!= void_list_node
;
10455 args
= TREE_CHAIN (args
))
10457 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10459 DECL_CHAIN (decl
) = decls
;
10463 parms
= nreverse (decls
);
10465 if (decl_context
!= TYPENAME
)
10467 /* The qualifiers on the function type become the qualifiers on
10468 the non-static member function. */
10469 memfn_quals
|= type_memfn_quals (type
);
10470 rqual
= type_memfn_rqual (type
);
10471 type_quals
= TYPE_UNQUALIFIED
;
10475 /* If this is a type name (such as, in a cast or sizeof),
10476 compute the type and return it now. */
10478 if (decl_context
== TYPENAME
)
10480 /* Note that the grammar rejects storage classes
10481 in typenames, fields or parameters. */
10482 if (type_quals
!= TYPE_UNQUALIFIED
)
10483 type_quals
= TYPE_UNQUALIFIED
;
10485 /* Special case: "friend class foo" looks like a TYPENAME context. */
10488 if (type_quals
!= TYPE_UNQUALIFIED
)
10490 error ("type qualifiers specified for friend class declaration");
10491 type_quals
= TYPE_UNQUALIFIED
;
10495 error ("%<inline%> specified for friend class declaration");
10501 /* Don't allow friend declaration without a class-key. */
10502 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10503 permerror (input_location
, "template parameters cannot be friends");
10504 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10505 permerror (input_location
, "friend declaration requires class-key, "
10506 "i.e. %<friend class %T::%D%>",
10507 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10509 permerror (input_location
, "friend declaration requires class-key, "
10510 "i.e. %<friend %#T%>",
10514 /* Only try to do this stuff if we didn't already give up. */
10515 if (type
!= integer_type_node
)
10517 /* A friendly class? */
10518 if (current_class_type
)
10519 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10520 /*complain=*/true);
10522 error ("trying to make class %qT a friend of global scope",
10525 type
= void_type_node
;
10528 else if (memfn_quals
|| rqual
)
10530 if (ctype
== NULL_TREE
10531 && TREE_CODE (type
) == METHOD_TYPE
)
10532 ctype
= TYPE_METHOD_BASETYPE (type
);
10535 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10536 /* Core issue #547: need to allow this in template type args.
10537 Allow it in general in C++11 for alias-declarations. */
10538 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10539 && TREE_CODE (type
) == FUNCTION_TYPE
)
10540 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10542 error ("invalid qualifiers on non-member function type");
10547 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10548 && decl_context
!= CATCHPARM
10549 && TREE_CODE (type
) != UNION_TYPE
10552 error ("abstract declarator %qT used as declaration", type
);
10553 return error_mark_node
;
10556 /* Only functions may be declared using an operator-function-id. */
10558 && IDENTIFIER_OPNAME_P (unqualified_id
)
10559 && TREE_CODE (type
) != FUNCTION_TYPE
10560 && TREE_CODE (type
) != METHOD_TYPE
)
10562 error ("declaration of %qD as non-function", unqualified_id
);
10563 return error_mark_node
;
10566 /* We don't check parameter types here because we can emit a better
10567 error message later. */
10568 if (decl_context
!= PARM
)
10570 type
= check_var_type (unqualified_id
, type
);
10571 if (type
== error_mark_node
)
10572 return error_mark_node
;
10575 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10576 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10578 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10580 if (ctype
|| in_namespace
)
10581 error ("cannot use %<::%> in parameter declaration");
10583 if (type_uses_auto (type
))
10585 if (cxx_dialect
>= cxx14
)
10586 error ("%<auto%> parameter not permitted in this context");
10588 error ("parameter declared %<auto%>");
10589 type
= error_mark_node
;
10592 /* A parameter declared as an array of T is really a pointer to T.
10593 One declared as a function is really a pointer to a function.
10594 One declared as a member is really a pointer to member. */
10596 if (TREE_CODE (type
) == ARRAY_TYPE
)
10598 /* Transfer const-ness of array into that of type pointed to. */
10599 type
= build_pointer_type (TREE_TYPE (type
));
10600 type_quals
= TYPE_UNQUALIFIED
;
10601 array_parameter_p
= true;
10603 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10604 type
= build_pointer_type (type
);
10607 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10608 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10610 cp_cv_quals real_quals
= memfn_quals
;
10611 if (cxx_dialect
< cxx14
&& constexpr_p
10612 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10613 real_quals
|= TYPE_QUAL_CONST
;
10614 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10620 if (decl_context
== PARM
)
10622 decl
= cp_build_parm_decl (unqualified_id
, type
);
10623 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10625 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10626 memfn_quals
!= TYPE_UNQUALIFIED
,
10627 inlinep
, friendp
, raises
!= NULL_TREE
);
10629 else if (decl_context
== FIELD
)
10631 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10632 && type_uses_auto (type
))
10634 error ("non-static data member declared %<auto%>");
10635 type
= error_mark_node
;
10638 /* The C99 flexible array extension. */
10639 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10640 && TYPE_DOMAIN (type
) == NULL_TREE
)
10642 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10643 tf_warning_or_error
);
10644 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10647 if (type
== error_mark_node
)
10649 /* Happens when declaring arrays of sizes which
10650 are error_mark_node, for example. */
10653 else if (in_namespace
&& !friendp
)
10655 /* Something like struct S { int N::j; }; */
10656 error ("invalid use of %<::%>");
10657 return error_mark_node
;
10659 else if (TREE_CODE (type
) == FUNCTION_TYPE
10660 || TREE_CODE (type
) == METHOD_TYPE
)
10663 tree function_context
;
10667 /* This should never happen in pure C++ (the check
10668 could be an assert). It could happen in
10669 Objective-C++ if someone writes invalid code that
10670 uses a function declaration for an instance
10671 variable or property (instance variables and
10672 properties are parsed as FIELD_DECLs, but they are
10673 part of an Objective-C class, not a C++ class).
10674 That code is invalid and is caught by this
10678 error ("declaration of function %qD in invalid context",
10680 return error_mark_node
;
10683 /* ``A union may [ ... ] not [ have ] virtual functions.''
10685 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10687 error ("function %qD declared virtual inside a union",
10689 return error_mark_node
;
10692 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10696 error ("%qD cannot be declared virtual, since it "
10697 "is always static",
10704 /* Check that the name used for a destructor makes sense. */
10705 if (sfk
== sfk_destructor
)
10707 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10711 gcc_assert (friendp
);
10712 error ("expected qualified name in friend declaration "
10713 "for destructor %qD", uqname
);
10714 return error_mark_node
;
10717 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10719 error ("declaration of %qD as member of %qT",
10721 return error_mark_node
;
10725 error ("a destructor cannot be %<constexpr%>");
10726 return error_mark_node
;
10729 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10731 error ("expected qualified name in friend declaration "
10732 "for constructor %qD",
10733 id_declarator
->u
.id
.unqualified_name
);
10734 return error_mark_node
;
10737 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10739 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10740 if (variable_template_p (tmpl
))
10742 error ("specialization of variable template %qD "
10743 "declared as function", tmpl
);
10744 inform (DECL_SOURCE_LOCATION (tmpl
),
10745 "variable template declared here");
10746 return error_mark_node
;
10750 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10751 function_context
= (ctype
!= NULL_TREE
) ?
10752 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10753 publicp
= (! friendp
|| ! staticp
)
10754 && function_context
== NULL_TREE
;
10756 if (late_return_type_p
)
10757 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10759 decl
= grokfndecl (ctype
, type
,
10760 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10761 ? unqualified_id
: dname
,
10764 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10765 friendp
? -1 : 0, friendp
, publicp
,
10766 inlinep
| (2 * constexpr_p
),
10767 initialized
== SD_DELETED
, sfk
,
10768 funcdef_flag
, template_count
, in_namespace
,
10769 attrlist
, declarator
->id_loc
);
10770 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10771 if (decl
== NULL_TREE
)
10772 return error_mark_node
;
10774 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10775 /* The decl and setting of decl_attr is also turned off. */
10776 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10779 /* [class.conv.ctor]
10781 A constructor declared without the function-specifier
10782 explicit that can be called with a single parameter
10783 specifies a conversion from the type of its first
10784 parameter to the type of its class. Such a constructor
10785 is called a converting constructor. */
10786 if (explicitp
== 2)
10787 DECL_NONCONVERTING_P (decl
) = 1;
10789 else if (!staticp
&& !dependent_type_p (type
)
10790 && !COMPLETE_TYPE_P (complete_type (type
))
10791 && (TREE_CODE (type
) != ARRAY_TYPE
10792 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10793 || initialized
== 0))
10795 if (unqualified_id
)
10797 error ("field %qD has incomplete type %qT",
10798 unqualified_id
, type
);
10799 cxx_incomplete_type_inform (strip_array_types (type
));
10802 error ("name %qT has incomplete type", type
);
10804 type
= error_mark_node
;
10811 error ("%qE is neither function nor member function; "
10812 "cannot be declared friend", unqualified_id
);
10820 /* Friends are treated specially. */
10821 if (ctype
== current_class_type
)
10822 ; /* We already issued a permerror. */
10823 else if (decl
&& DECL_NAME (decl
))
10825 if (template_class_depth (current_class_type
) == 0)
10827 decl
= check_explicit_specialization
10828 (unqualified_id
, decl
, template_count
,
10829 2 * funcdef_flag
+ 4);
10830 if (decl
== error_mark_node
)
10831 return error_mark_node
;
10834 decl
= do_friend (ctype
, unqualified_id
, decl
,
10840 return error_mark_node
;
10843 /* Structure field. It may not be a function, except for C++. */
10845 if (decl
== NULL_TREE
)
10849 /* C++ allows static class members. All other work
10850 for this is done by grokfield. */
10851 decl
= build_lang_decl_loc (declarator
10852 ? declarator
->id_loc
10854 VAR_DECL
, unqualified_id
, type
);
10855 set_linkage_for_static_data_member (decl
);
10856 /* Even if there is an in-class initialization, DECL
10857 is considered undefined until an out-of-class
10858 definition is provided. */
10859 DECL_EXTERNAL (decl
) = 1;
10863 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10864 if (declspecs
->gnu_thread_keyword_p
)
10865 DECL_GNU_TLS_P (decl
) = true;
10868 if (constexpr_p
&& !initialized
)
10870 error ("constexpr static data member %qD must have an "
10871 "initializer", decl
);
10872 constexpr_p
= false;
10879 error ("non-static data member %qE declared %<constexpr%>",
10881 constexpr_p
= false;
10883 decl
= build_decl (input_location
,
10884 FIELD_DECL
, unqualified_id
, type
);
10885 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10886 if (bitfield
&& !unqualified_id
)
10887 TREE_NO_WARNING (decl
) = 1;
10889 if (storage_class
== sc_mutable
)
10891 DECL_MUTABLE_P (decl
) = 1;
10892 storage_class
= sc_none
;
10897 /* An attempt is being made to initialize a non-static
10898 member. This is new in C++11. */
10899 maybe_warn_cpp0x (CPP0X_NSDMI
);
10901 /* If this has been parsed with static storage class, but
10902 errors forced staticp to be cleared, ensure NSDMI is
10904 if (declspecs
->storage_class
== sc_static
)
10905 DECL_INITIAL (decl
) = error_mark_node
;
10909 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10910 memfn_quals
!= TYPE_UNQUALIFIED
,
10911 inlinep
, friendp
, raises
!= NULL_TREE
);
10914 else if (TREE_CODE (type
) == FUNCTION_TYPE
10915 || TREE_CODE (type
) == METHOD_TYPE
)
10917 tree original_name
;
10920 if (!unqualified_id
)
10921 return error_mark_node
;
10923 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10924 original_name
= dname
;
10926 original_name
= unqualified_id
;
10928 if (storage_class
== sc_auto
)
10929 error ("storage class %<auto%> invalid for function %qs", name
);
10930 else if (storage_class
== sc_register
)
10931 error ("storage class %<register%> invalid for function %qs", name
);
10934 if (declspecs
->gnu_thread_keyword_p
)
10935 error ("storage class %<__thread%> invalid for function %qs",
10938 error ("storage class %<thread_local%> invalid for function %qs",
10942 if (virt_specifiers
)
10943 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10944 /* Function declaration not at top level.
10945 Storage classes other than `extern' are not allowed
10946 and `extern' makes no difference. */
10947 if (! toplevel_bindings_p ()
10948 && (storage_class
== sc_static
10949 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10952 if (storage_class
== sc_static
)
10953 pedwarn (input_location
, OPT_Wpedantic
,
10954 "%<static%> specified invalid for function %qs "
10955 "declared out of global scope", name
);
10957 pedwarn (input_location
, OPT_Wpedantic
,
10958 "%<inline%> specifier invalid for function %qs "
10959 "declared out of global scope", name
);
10962 if (ctype
== NULL_TREE
)
10966 error ("virtual non-class function %qs", name
);
10969 else if (sfk
== sfk_constructor
10970 || sfk
== sfk_destructor
)
10972 error (funcdef_flag
10973 ? G_("%qs defined in a non-class scope")
10974 : G_("%qs declared in a non-class scope"), name
);
10979 /* Record whether the function is public. */
10980 publicp
= (ctype
!= NULL_TREE
10981 || storage_class
!= sc_static
);
10983 if (late_return_type_p
)
10984 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10986 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10987 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10989 publicp
, inlinep
| (2 * constexpr_p
),
10990 initialized
== SD_DELETED
, sfk
,
10992 template_count
, in_namespace
, attrlist
,
10993 declarator
->id_loc
);
10994 if (decl
== NULL_TREE
)
10995 return error_mark_node
;
10999 int invalid_static
= 0;
11001 /* Don't allow a static member function in a class, and forbid
11002 declaring main to be static. */
11003 if (TREE_CODE (type
) == METHOD_TYPE
)
11005 permerror (input_location
, "cannot declare member function %qD to have "
11006 "static linkage", decl
);
11007 invalid_static
= 1;
11009 else if (current_function_decl
)
11011 /* FIXME need arm citation */
11012 error ("cannot declare static function inside another function");
11013 invalid_static
= 1;
11016 if (invalid_static
)
11019 storage_class
= sc_none
;
11025 /* It's a variable. */
11027 /* An uninitialized decl with `extern' is a reference. */
11028 decl
= grokvardecl (type
, dname
, unqualified_id
,
11031 (type_quals
& TYPE_QUAL_CONST
) != 0,
11033 ctype
? ctype
: in_namespace
);
11034 if (decl
== NULL_TREE
)
11035 return error_mark_node
;
11037 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11038 memfn_quals
!= TYPE_UNQUALIFIED
,
11039 inlinep
, friendp
, raises
!= NULL_TREE
);
11043 DECL_CONTEXT (decl
) = ctype
;
11046 permerror (input_location
, "%<static%> may not be used when defining "
11047 "(as opposed to declaring) a static data member");
11049 storage_class
= sc_none
;
11051 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11053 error ("static member %qD declared %<register%>", decl
);
11054 storage_class
= sc_none
;
11056 if (storage_class
== sc_extern
&& pedantic
)
11058 pedwarn (input_location
, OPT_Wpedantic
,
11059 "cannot explicitly declare member %q#D to have "
11060 "extern linkage", decl
);
11061 storage_class
= sc_none
;
11064 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11066 error ("declaration of constexpr variable %qD is not a definition",
11068 constexpr_p
= false;
11072 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11074 if (toplevel_bindings_p ())
11076 /* It's common practice (and completely valid) to have a const
11077 be initialized and declared extern. */
11078 if (!(type_quals
& TYPE_QUAL_CONST
))
11079 warning (0, "%qs initialized and declared %<extern%>", name
);
11083 error ("%qs has both %<extern%> and initializer", name
);
11084 return error_mark_node
;
11088 /* Record `register' declaration for warnings on &
11089 and in case doing stupid register allocation. */
11091 if (storage_class
== sc_register
)
11092 DECL_REGISTER (decl
) = 1;
11093 else if (storage_class
== sc_extern
)
11094 DECL_THIS_EXTERN (decl
) = 1;
11095 else if (storage_class
== sc_static
)
11096 DECL_THIS_STATIC (decl
) = 1;
11098 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11099 if (constexpr_p
&& VAR_P (decl
))
11100 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11102 /* Record constancy and volatility on the DECL itself . There's
11103 no need to do this when processing a template; we'll do this
11104 for the instantiated declaration based on the type of DECL. */
11105 if (!processing_template_decl
)
11106 cp_apply_type_quals_to_decl (type_quals
, decl
);
11112 /* Subroutine of start_function. Ensure that each of the parameter
11113 types (as listed in PARMS) is complete, as is required for a
11114 function definition. */
11117 require_complete_types_for_parms (tree parms
)
11119 for (; parms
; parms
= DECL_CHAIN (parms
))
11121 if (dependent_type_p (TREE_TYPE (parms
)))
11123 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11124 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11126 relayout_decl (parms
);
11127 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11130 /* grokparms or complete_type_or_else will have already issued
11132 TREE_TYPE (parms
) = error_mark_node
;
11136 /* Returns nonzero if T is a local variable. */
11139 local_variable_p (const_tree t
)
11142 /* A VAR_DECL with a context that is a _TYPE is a static data
11144 && !TYPE_P (CP_DECL_CONTEXT (t
))
11145 /* Any other non-local variable must be at namespace scope. */
11146 && !DECL_NAMESPACE_SCOPE_P (t
))
11147 || (TREE_CODE (t
) == PARM_DECL
))
11153 /* Like local_variable_p, but suitable for use as a tree-walking
11157 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11160 if (local_variable_p (*tp
)
11161 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11163 else if (TYPE_P (*tp
))
11164 *walk_subtrees
= 0;
11169 /* Check that ARG, which is a default-argument expression for a
11170 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11171 something goes wrong. DECL may also be a _TYPE node, rather than a
11172 DECL, if there is no DECL available. */
11175 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11180 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11181 /* We get a DEFAULT_ARG when looking at an in-class declaration
11182 with a default argument. Ignore the argument for now; we'll
11183 deal with it after the class is complete. */
11192 decl_type
= TREE_TYPE (decl
);
11194 if (arg
== error_mark_node
11195 || decl
== error_mark_node
11196 || TREE_TYPE (arg
) == error_mark_node
11197 || decl_type
== error_mark_node
)
11198 /* Something already went wrong. There's no need to check
11200 return error_mark_node
;
11202 /* [dcl.fct.default]
11204 A default argument expression is implicitly converted to the
11206 ++cp_unevaluated_operand
;
11207 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11209 --cp_unevaluated_operand
;
11211 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11213 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11214 && null_ptr_cst_p (arg
))
11215 return nullptr_node
;
11217 /* [dcl.fct.default]
11219 Local variables shall not be used in default argument
11222 The keyword `this' shall not be used in a default argument of a
11223 member function. */
11224 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11227 if (complain
& tf_warning_or_error
)
11229 if (DECL_NAME (var
) == this_identifier
)
11230 permerror (input_location
, "default argument %qE uses %qD",
11233 error ("default argument %qE uses local variable %qD", arg
, var
);
11235 return error_mark_node
;
11242 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11245 type_is_deprecated (tree type
)
11247 enum tree_code code
;
11248 if (TREE_DEPRECATED (type
))
11250 if (TYPE_NAME (type
)
11251 && TREE_DEPRECATED (TYPE_NAME (type
)))
11254 /* Do warn about using typedefs to a deprecated class. */
11255 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11256 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11258 code
= TREE_CODE (type
);
11260 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11261 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11262 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11263 return type_is_deprecated (TREE_TYPE (type
));
11265 if (TYPE_PTRMEMFUNC_P (type
))
11266 return type_is_deprecated
11267 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11272 /* Decode the list of parameter types for a function type.
11273 Given the list of things declared inside the parens,
11274 return a list of types.
11276 If this parameter does not end with an ellipsis, we append
11279 *PARMS is set to the chain of PARM_DECLs created. */
11282 grokparms (tree parmlist
, tree
*parms
)
11284 tree result
= NULL_TREE
;
11285 tree decls
= NULL_TREE
;
11289 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11291 tree type
= NULL_TREE
;
11292 tree init
= TREE_PURPOSE (parm
);
11293 tree decl
= TREE_VALUE (parm
);
11294 const char *errmsg
;
11296 if (parm
== void_list_node
)
11299 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11302 type
= TREE_TYPE (decl
);
11303 if (VOID_TYPE_P (type
))
11305 if (same_type_p (type
, void_type_node
)
11307 && !DECL_NAME (decl
) && !result
11308 && TREE_CHAIN (parm
) == void_list_node
)
11309 /* DR 577: A parameter list consisting of a single
11310 unnamed parameter of non-dependent type 'void'. */
11312 else if (cv_qualified_p (type
))
11313 error_at (DECL_SOURCE_LOCATION (decl
),
11314 "invalid use of cv-qualified type %qT in "
11315 "parameter declaration", type
);
11317 error_at (DECL_SOURCE_LOCATION (decl
),
11318 "invalid use of type %<void%> in parameter "
11320 /* It's not a good idea to actually create parameters of
11321 type `void'; other parts of the compiler assume that a
11322 void type terminates the parameter list. */
11323 type
= error_mark_node
;
11324 TREE_TYPE (decl
) = error_mark_node
;
11327 if (type
!= error_mark_node
11328 && TYPE_FOR_JAVA (type
)
11329 && MAYBE_CLASS_TYPE_P (type
))
11331 error ("parameter %qD has Java class type", decl
);
11332 type
= error_mark_node
;
11333 TREE_TYPE (decl
) = error_mark_node
;
11337 if (type
!= error_mark_node
11338 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11341 type
= error_mark_node
;
11342 TREE_TYPE (decl
) = error_mark_node
;
11345 if (type
!= error_mark_node
)
11347 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11349 tree deptype
= type_is_deprecated (type
);
11351 warn_deprecated_use (deptype
, NULL_TREE
);
11354 /* Top-level qualifiers on the parameters are
11355 ignored for function types. */
11356 type
= cp_build_qualified_type (type
, 0);
11357 if (TREE_CODE (type
) == METHOD_TYPE
)
11359 error ("parameter %qD invalidly declared method type", decl
);
11360 type
= build_pointer_type (type
);
11361 TREE_TYPE (decl
) = type
;
11363 else if (abstract_virtuals_error (decl
, type
))
11364 any_error
= 1; /* Seems like a good idea. */
11365 else if (POINTER_TYPE_P (type
))
11367 /* [dcl.fct]/6, parameter types cannot contain pointers
11368 (references) to arrays of unknown bound. */
11369 tree t
= TREE_TYPE (type
);
11370 int ptr
= TYPE_PTR_P (type
);
11374 if (TYPE_PTR_P (t
))
11376 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11378 else if (!TYPE_DOMAIN (t
))
11382 if (TREE_CODE (t
) == ARRAY_TYPE
)
11384 ? G_("parameter %qD includes pointer to array of "
11385 "unknown bound %qT")
11386 : G_("parameter %qD includes reference to array of "
11387 "unknown bound %qT"),
11393 else if (init
&& !processing_template_decl
)
11394 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11397 DECL_CHAIN (decl
) = decls
;
11399 result
= tree_cons (init
, type
, result
);
11401 decls
= nreverse (decls
);
11402 result
= nreverse (result
);
11404 result
= chainon (result
, void_list_node
);
11411 /* D is a constructor or overloaded `operator='.
11413 Let T be the class in which D is declared. Then, this function
11416 -1 if D's is an ill-formed constructor or copy assignment operator
11417 whose first parameter is of type `T'.
11418 0 if D is not a copy constructor or copy assignment
11420 1 if D is a copy constructor or copy assignment operator whose
11421 first parameter is a reference to non-const qualified T.
11422 2 if D is a copy constructor or copy assignment operator whose
11423 first parameter is a reference to const qualified T.
11425 This function can be used as a predicate. Positive values indicate
11426 a copy constructor and nonzero values indicate a copy assignment
11430 copy_fn_p (const_tree d
)
11436 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11438 if (TREE_CODE (d
) == TEMPLATE_DECL
11439 || (DECL_TEMPLATE_INFO (d
)
11440 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11441 /* Instantiations of template member functions are never copy
11442 functions. Note that member functions of templated classes are
11443 represented as template functions internally, and we must
11444 accept those as copy functions. */
11447 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11451 arg_type
= TREE_VALUE (args
);
11452 if (arg_type
== error_mark_node
)
11455 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11457 /* Pass by value copy assignment operator. */
11460 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11461 && !TYPE_REF_IS_RVALUE (arg_type
)
11462 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11464 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11470 args
= TREE_CHAIN (args
);
11472 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11473 /* There are more non-optional args. */
11479 /* D is a constructor or overloaded `operator='.
11481 Let T be the class in which D is declared. Then, this function
11482 returns true when D is a move constructor or move assignment
11483 operator, false otherwise. */
11486 move_fn_p (const_tree d
)
11488 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11490 if (cxx_dialect
== cxx98
)
11491 /* There are no move constructors if we are in C++98 mode. */
11494 if (TREE_CODE (d
) == TEMPLATE_DECL
11495 || (DECL_TEMPLATE_INFO (d
)
11496 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11497 /* Instantiations of template member functions are never move
11498 functions. Note that member functions of templated classes are
11499 represented as template functions internally, and we must
11500 accept those as move functions. */
11503 return move_signature_fn_p (d
);
11506 /* D is a constructor or overloaded `operator='.
11508 Then, this function returns true when D has the same signature as a move
11509 constructor or move assignment operator (because either it is such a
11510 ctor/op= or it is a template specialization with the same signature),
11511 false otherwise. */
11514 move_signature_fn_p (const_tree d
)
11518 bool result
= false;
11520 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11524 arg_type
= TREE_VALUE (args
);
11525 if (arg_type
== error_mark_node
)
11528 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11529 && TYPE_REF_IS_RVALUE (arg_type
)
11530 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11534 args
= TREE_CHAIN (args
);
11536 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11537 /* There are more non-optional args. */
11543 /* Remember any special properties of member function DECL. */
11546 grok_special_member_properties (tree decl
)
11550 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11553 class_type
= DECL_CONTEXT (decl
);
11554 if (DECL_CONSTRUCTOR_P (decl
))
11556 int ctor
= copy_fn_p (decl
);
11558 if (!DECL_ARTIFICIAL (decl
))
11559 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11565 A non-template constructor for class X is a copy
11566 constructor if its first parameter is of type X&, const
11567 X&, volatile X& or const volatile X&, and either there
11568 are no other parameters or else all other parameters have
11569 default arguments. */
11570 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11571 if (user_provided_p (decl
))
11572 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11574 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11576 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11577 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11578 else if (move_fn_p (decl
) && user_provided_p (decl
))
11579 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11580 else if (is_list_ctor (decl
))
11581 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11583 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11584 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11585 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11587 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11591 A non-template assignment operator for class X is a copy
11592 assignment operator if its parameter is of type X, X&, const
11593 X&, volatile X& or const volatile X&. */
11595 int assop
= copy_fn_p (decl
);
11599 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11600 if (user_provided_p (decl
))
11601 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11603 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11605 else if (move_fn_p (decl
) && user_provided_p (decl
))
11606 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11608 /* Destructors are handled in check_methods. */
11611 /* Check a constructor DECL has the correct form. Complains
11612 if the class has a constructor of the form X(X). */
11615 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11617 int ctor_parm
= copy_fn_p (decl
);
11623 A declaration of a constructor for a class X is ill-formed if
11624 its first parameter is of type (optionally cv-qualified) X
11625 and either there are no other parameters or else all other
11626 parameters have default arguments.
11628 We *don't* complain about member template instantiations that
11629 have this form, though; they can occur as we try to decide
11630 what constructor to use during overload resolution. Since
11631 overload resolution will never prefer such a constructor to
11632 the non-template copy constructor (which is either explicitly
11633 or implicitly defined), there's no need to worry about their
11634 existence. Theoretically, they should never even be
11635 instantiated, but that's hard to forestall. */
11636 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11644 /* An operator with this code is unary, but can also be binary. */
11647 ambi_op_p (enum tree_code code
)
11649 return (code
== INDIRECT_REF
11650 || code
== ADDR_EXPR
11651 || code
== UNARY_PLUS_EXPR
11652 || code
== NEGATE_EXPR
11653 || code
== PREINCREMENT_EXPR
11654 || code
== PREDECREMENT_EXPR
);
11657 /* An operator with this name can only be unary. */
11660 unary_op_p (enum tree_code code
)
11662 return (code
== TRUTH_NOT_EXPR
11663 || code
== BIT_NOT_EXPR
11664 || code
== COMPONENT_REF
11665 || code
== TYPE_EXPR
);
11668 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11669 errors are issued for invalid declarations. */
11672 grok_op_properties (tree decl
, bool complain
)
11674 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11676 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11677 tree name
= DECL_NAME (decl
);
11678 enum tree_code operator_code
;
11683 /* Count the number of arguments and check for ellipsis. */
11684 for (argtype
= argtypes
, arity
= 0;
11685 argtype
&& argtype
!= void_list_node
;
11686 argtype
= TREE_CHAIN (argtype
))
11688 ellipsis_p
= !argtype
;
11690 class_type
= DECL_CONTEXT (decl
);
11691 if (class_type
&& !CLASS_TYPE_P (class_type
))
11692 class_type
= NULL_TREE
;
11694 if (DECL_CONV_FN_P (decl
))
11695 operator_code
= TYPE_EXPR
;
11699 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11700 if (ansi_opname (CODE) == name) \
11702 operator_code = (CODE); \
11705 else if (ansi_assopname (CODE) == name) \
11707 operator_code = (CODE); \
11708 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11712 #include "operators.def"
11713 #undef DEF_OPERATOR
11715 gcc_unreachable ();
11718 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11719 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11722 switch (operator_code
)
11725 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11729 TYPE_GETS_DELETE (class_type
) |= 1;
11733 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11736 case VEC_DELETE_EXPR
:
11737 TYPE_GETS_DELETE (class_type
) |= 2;
11744 /* [basic.std.dynamic.allocation]/1:
11746 A program is ill-formed if an allocation function is declared
11747 in a namespace scope other than global scope or declared static
11750 The same also holds true for deallocation functions. */
11751 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11752 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11754 if (DECL_NAMESPACE_SCOPE_P (decl
))
11756 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11758 error ("%qD may not be declared within a namespace", decl
);
11761 else if (!TREE_PUBLIC (decl
))
11763 error ("%qD may not be declared as static", decl
);
11766 if (!flag_sized_deallocation
&& warn_cxx14_compat
)
11768 tree parm
= FUNCTION_ARG_CHAIN (decl
);
11769 if (parm
&& same_type_p (TREE_VALUE (parm
), size_type_node
)
11770 && TREE_CHAIN (parm
) == void_list_node
)
11771 warning_at (DECL_SOURCE_LOCATION (decl
), OPT_Wc__14_compat
,
11772 "%qD is a usual (non-placement) deallocation "
11773 "function in C++14 (or with -fsized-deallocation)",
11779 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11781 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11782 DECL_IS_OPERATOR_NEW (decl
) = 1;
11784 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11785 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11788 /* An operator function must either be a non-static member function
11789 or have at least one parameter of a class, a reference to a class,
11790 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11791 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11793 if (operator_code
== TYPE_EXPR
11794 || operator_code
== CALL_EXPR
11795 || operator_code
== COMPONENT_REF
11796 || operator_code
== ARRAY_REF
11797 || operator_code
== NOP_EXPR
)
11799 error ("%qD must be a nonstatic member function", decl
);
11806 if (DECL_STATIC_FUNCTION_P (decl
))
11808 error ("%qD must be either a non-static member "
11809 "function or a non-member function", decl
);
11813 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11815 tree arg
= non_reference (TREE_VALUE (p
));
11816 if (arg
== error_mark_node
)
11819 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11820 because these checks are performed even on
11821 template functions. */
11822 if (MAYBE_CLASS_TYPE_P (arg
)
11823 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11827 if (!p
|| p
== void_list_node
)
11830 error ("%qD must have an argument of class or "
11831 "enumerated type", decl
);
11837 /* There are no restrictions on the arguments to an overloaded
11839 if (operator_code
== CALL_EXPR
)
11842 /* Warn about conversion operators that will never be used. */
11843 if (IDENTIFIER_TYPENAME_P (name
)
11844 && ! DECL_TEMPLATE_INFO (decl
)
11846 /* Warn only declaring the function; there is no need to
11847 warn again about out-of-class definitions. */
11848 && class_type
== current_class_type
)
11850 tree t
= TREE_TYPE (name
);
11851 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11854 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11856 if (VOID_TYPE_P (t
))
11857 warning (OPT_Wconversion
,
11859 ? G_("conversion to a reference to void "
11860 "will never use a type conversion operator")
11861 : G_("conversion to void "
11862 "will never use a type conversion operator"));
11863 else if (class_type
)
11865 if (t
== class_type
)
11866 warning (OPT_Wconversion
,
11868 ? G_("conversion to a reference to the same type "
11869 "will never use a type conversion operator")
11870 : G_("conversion to the same type "
11871 "will never use a type conversion operator"));
11872 /* Don't force t to be complete here. */
11873 else if (MAYBE_CLASS_TYPE_P (t
)
11874 && COMPLETE_TYPE_P (t
)
11875 && DERIVED_FROM_P (t
, class_type
))
11876 warning (OPT_Wconversion
,
11878 ? G_("conversion to a reference to a base class "
11879 "will never use a type conversion operator")
11880 : G_("conversion to a base class "
11881 "will never use a type conversion operator"));
11886 if (operator_code
== COND_EXPR
)
11889 error ("ISO C++ prohibits overloading operator ?:");
11892 else if (ellipsis_p
)
11894 error ("%qD must not have variable number of arguments", decl
);
11897 else if (ambi_op_p (operator_code
))
11900 /* We pick the one-argument operator codes by default, so
11901 we don't have to change anything. */
11903 else if (arity
== 2)
11905 /* If we thought this was a unary operator, we now know
11906 it to be a binary operator. */
11907 switch (operator_code
)
11910 operator_code
= MULT_EXPR
;
11914 operator_code
= BIT_AND_EXPR
;
11917 case UNARY_PLUS_EXPR
:
11918 operator_code
= PLUS_EXPR
;
11922 operator_code
= MINUS_EXPR
;
11925 case PREINCREMENT_EXPR
:
11926 operator_code
= POSTINCREMENT_EXPR
;
11929 case PREDECREMENT_EXPR
:
11930 operator_code
= POSTDECREMENT_EXPR
;
11934 gcc_unreachable ();
11937 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11939 if ((operator_code
== POSTINCREMENT_EXPR
11940 || operator_code
== POSTDECREMENT_EXPR
)
11941 && ! processing_template_decl
11942 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11945 error ("postfix %qD must take %<int%> as its argument",
11948 error ("postfix %qD must take %<int%> as its second "
11956 error ("%qD must take either zero or one argument", decl
);
11958 error ("%qD must take either one or two arguments", decl
);
11962 /* More Effective C++ rule 6. */
11964 && (operator_code
== POSTINCREMENT_EXPR
11965 || operator_code
== POSTDECREMENT_EXPR
11966 || operator_code
== PREINCREMENT_EXPR
11967 || operator_code
== PREDECREMENT_EXPR
))
11969 tree arg
= TREE_VALUE (argtypes
);
11970 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11971 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11972 arg
= TREE_TYPE (arg
);
11973 arg
= TYPE_MAIN_VARIANT (arg
);
11974 if (operator_code
== PREINCREMENT_EXPR
11975 || operator_code
== PREDECREMENT_EXPR
)
11977 if (TREE_CODE (ret
) != REFERENCE_TYPE
11978 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11980 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11981 build_reference_type (arg
));
11985 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11986 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11990 else if (unary_op_p (operator_code
))
11995 error ("%qD must take %<void%>", decl
);
11997 error ("%qD must take exactly one argument", decl
);
12001 else /* if (binary_op_p (operator_code)) */
12006 error ("%qD must take exactly one argument", decl
);
12008 error ("%qD must take exactly two arguments", decl
);
12012 /* More Effective C++ rule 7. */
12014 && (operator_code
== TRUTH_ANDIF_EXPR
12015 || operator_code
== TRUTH_ORIF_EXPR
12016 || operator_code
== COMPOUND_EXPR
))
12017 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12021 /* Effective C++ rule 23. */
12024 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12025 && (operator_code
== PLUS_EXPR
12026 || operator_code
== MINUS_EXPR
12027 || operator_code
== TRUNC_DIV_EXPR
12028 || operator_code
== MULT_EXPR
12029 || operator_code
== TRUNC_MOD_EXPR
)
12030 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12031 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12033 /* [over.oper]/8 */
12034 for (; argtypes
&& argtypes
!= void_list_node
;
12035 argtypes
= TREE_CHAIN (argtypes
))
12036 if (TREE_PURPOSE (argtypes
))
12038 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12039 if (operator_code
== POSTINCREMENT_EXPR
12040 || operator_code
== POSTDECREMENT_EXPR
)
12042 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12047 error ("%qD cannot have default arguments", decl
);
12055 /* Return a string giving the keyword associate with CODE. */
12057 static const char *
12058 tag_name (enum tag_types code
)
12070 case typename_type
:
12073 gcc_unreachable ();
12077 /* Name lookup in an elaborated-type-specifier (after the keyword
12078 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12079 elaborated-type-specifier is invalid, issue a diagnostic and return
12080 error_mark_node; otherwise, return the *_TYPE to which it referred.
12081 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12084 check_elaborated_type_specifier (enum tag_types tag_code
,
12086 bool allow_template_p
)
12092 struct S { struct S *p; };
12094 name lookup will find the TYPE_DECL for the implicit "S::S"
12095 typedef. Adjust for that here. */
12096 if (DECL_SELF_REFERENCE_P (decl
))
12097 decl
= TYPE_NAME (TREE_TYPE (decl
));
12099 type
= TREE_TYPE (decl
);
12101 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12102 is false for this case as well. */
12103 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12105 error ("using template type parameter %qT after %qs",
12106 type
, tag_name (tag_code
));
12107 return error_mark_node
;
12109 /* Accept template template parameters. */
12110 else if (allow_template_p
12111 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12112 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12116 If the identifier resolves to a typedef-name or the
12117 simple-template-id resolves to an alias template
12118 specialization, the elaborated-type-specifier is ill-formed.
12120 In other words, the only legitimate declaration to use in the
12121 elaborated type specifier is the implicit typedef created when
12122 the type is declared. */
12123 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12124 && !DECL_SELF_REFERENCE_P (decl
)
12125 && tag_code
!= typename_type
)
12127 if (alias_template_specialization_p (type
))
12128 error ("using alias template specialization %qT after %qs",
12129 type
, tag_name (tag_code
));
12131 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12132 inform (DECL_SOURCE_LOCATION (decl
),
12133 "%qD has a previous declaration here", decl
);
12134 return error_mark_node
;
12136 else if (TREE_CODE (type
) != RECORD_TYPE
12137 && TREE_CODE (type
) != UNION_TYPE
12138 && tag_code
!= enum_type
12139 && tag_code
!= typename_type
)
12141 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12142 inform (input_location
, "%q+T has a previous declaration here", type
);
12143 return error_mark_node
;
12145 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12146 && tag_code
== enum_type
)
12148 error ("%qT referred to as enum", type
);
12149 inform (input_location
, "%q+T has a previous declaration here", type
);
12150 return error_mark_node
;
12152 else if (!allow_template_p
12153 && TREE_CODE (type
) == RECORD_TYPE
12154 && CLASSTYPE_IS_TEMPLATE (type
))
12156 /* If a class template appears as elaborated type specifier
12157 without a template header such as:
12159 template <class T> class C {};
12160 void f(class C); // No template header here
12162 then the required template argument is missing. */
12163 error ("template argument required for %<%s %T%>",
12164 tag_name (tag_code
),
12165 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12166 return error_mark_node
;
12172 /* Lookup NAME in elaborate type specifier in scope according to
12173 SCOPE and issue diagnostics if necessary.
12174 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12175 found, and ERROR_MARK_NODE for type error. */
12178 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12179 tag_scope scope
, bool template_header_p
)
12183 if (scope
== ts_global
)
12185 /* First try ordinary name lookup, ignoring hidden class name
12186 injected via friend declaration. */
12187 decl
= lookup_name_prefer_type (name
, 2);
12188 decl
= strip_using_decl (decl
);
12189 /* If that fails, the name will be placed in the smallest
12190 non-class, non-function-prototype scope according to 3.3.1/5.
12191 We may already have a hidden name declared as friend in this
12192 scope. So lookup again but not ignoring hidden names.
12193 If we find one, that name will be made visible rather than
12194 creating a new tag. */
12196 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12199 decl
= lookup_type_scope (name
, scope
);
12202 && (DECL_CLASS_TEMPLATE_P (decl
)
12203 /* If scope is ts_current we're defining a class, so ignore a
12204 template template parameter. */
12205 || (scope
!= ts_current
12206 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12207 decl
= DECL_TEMPLATE_RESULT (decl
);
12209 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12211 /* Look for invalid nested type:
12215 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12217 error ("%qD has the same name as the class in which it is "
12220 return error_mark_node
;
12223 /* Two cases we need to consider when deciding if a class
12224 template is allowed as an elaborated type specifier:
12225 1. It is a self reference to its own class.
12226 2. It comes with a template header.
12230 template <class T> class C {
12231 class C *c1; // DECL_SELF_REFERENCE_P is true
12234 template <class U> class C; // template_header_p is true
12235 template <class T> class C<T>::D {
12236 class C *c2; // DECL_SELF_REFERENCE_P is true
12239 t
= check_elaborated_type_specifier (tag_code
,
12242 | DECL_SELF_REFERENCE_P (decl
));
12245 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12247 error ("reference to %qD is ambiguous", name
);
12248 print_candidates (decl
);
12249 return error_mark_node
;
12255 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12256 Define the tag as a forward-reference if it is not defined.
12258 If a declaration is given, process it here, and report an error if
12259 multiple declarations are not identical.
12261 SCOPE is TS_CURRENT when this is also a definition. Only look in
12262 the current frame for the name (since C++ allows new names in any
12263 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12264 declaration. Only look beginning from the current scope outward up
12265 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12267 TEMPLATE_HEADER_P is true when this declaration is preceded by
12268 a set of template parameters. */
12271 xref_tag_1 (enum tag_types tag_code
, tree name
,
12272 tag_scope orig_scope
, bool template_header_p
)
12274 enum tree_code code
;
12276 tree context
= NULL_TREE
;
12279 gcc_assert (identifier_p (name
));
12285 code
= RECORD_TYPE
;
12291 code
= ENUMERAL_TYPE
;
12294 gcc_unreachable ();
12297 if (orig_scope
== ts_lambda
)
12298 scope
= ts_current
;
12300 scope
= orig_scope
;
12302 /* In case of anonymous name, xref_tag is only called to
12303 make type node and push name. Name lookup is not required. */
12304 if (ANON_AGGRNAME_P (name
))
12307 t
= lookup_and_check_tag (tag_code
, name
,
12308 scope
, template_header_p
);
12310 if (t
== error_mark_node
)
12311 return error_mark_node
;
12313 if (scope
!= ts_current
&& t
&& current_class_type
12314 && template_class_depth (current_class_type
)
12315 && template_header_p
)
12317 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12320 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12321 definition of this tag. Since, in addition, we are currently
12322 processing a (member) template declaration of a template
12323 class, we must be very careful; consider:
12330 { template <class V>
12331 friend struct S1; };
12333 Here, the S2::S1 declaration should not be confused with the
12334 outer declaration. In particular, the inner version should
12335 have a template parameter of level 2, not level 1. This
12336 would be particularly important if the member declaration
12339 template <class V = U> friend struct S1;
12341 say, when we should tsubst into `U' when instantiating
12342 S2. On the other hand, when presented with:
12352 we must find the inner binding eventually. We
12353 accomplish this by making sure that the new type we
12354 create to represent this declaration has the right
12356 context
= TYPE_CONTEXT (t
);
12362 /* If no such tag is yet defined, create a forward-reference node
12363 and record it as the "definition".
12364 When a real declaration of this type is found,
12365 the forward-reference will be altered into a real type. */
12366 if (code
== ENUMERAL_TYPE
)
12368 error ("use of enum %q#D without previous declaration", name
);
12369 return error_mark_node
;
12373 t
= make_class_type (code
);
12374 TYPE_CONTEXT (t
) = context
;
12375 if (orig_scope
== ts_lambda
)
12376 /* Remember that we're declaring a lambda to avoid bogus errors
12377 in push_template_decl. */
12378 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12379 t
= pushtag (name
, t
, scope
);
12384 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12386 if (!redeclare_class_template (t
, current_template_parms
))
12387 return error_mark_node
;
12389 else if (!processing_template_decl
12390 && CLASS_TYPE_P (t
)
12391 && CLASSTYPE_IS_TEMPLATE (t
))
12393 error ("redeclaration of %qT as a non-template", t
);
12394 error ("previous declaration %q+D", t
);
12395 return error_mark_node
;
12398 /* Make injected friend class visible. */
12399 if (scope
!= ts_within_enclosing_non_class
12400 && hidden_name_p (TYPE_NAME (t
)))
12402 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12403 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12405 if (TYPE_TEMPLATE_INFO (t
))
12407 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12408 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12416 /* Wrapper for xref_tag_1. */
12419 xref_tag (enum tag_types tag_code
, tree name
,
12420 tag_scope scope
, bool template_header_p
)
12424 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12425 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12426 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12432 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12434 enum tag_types tag_kind
;
12436 if (TREE_CODE (old
) == RECORD_TYPE
)
12437 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12439 tag_kind
= union_type
;
12441 if (id
== NULL_TREE
)
12442 id
= TYPE_IDENTIFIER (old
);
12444 return xref_tag (tag_kind
, id
, scope
, false);
12447 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12448 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12449 access_* node, and the TREE_VALUE is the type of the base-class.
12450 Non-NULL TREE_TYPE indicates virtual inheritance.
12452 Returns true if the binfo hierarchy was successfully created,
12453 false if an error was detected. */
12456 xref_basetypes (tree ref
, tree base_list
)
12459 tree binfo
, base_binfo
;
12460 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12461 unsigned max_bases
= 0; /* Maximum direct bases. */
12463 tree default_access
;
12464 tree igo_prev
; /* Track Inheritance Graph Order. */
12466 if (ref
== error_mark_node
)
12469 /* The base of a derived class is private by default, all others are
12471 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12472 && CLASSTYPE_DECLARED_CLASS (ref
)
12473 ? access_private_node
: access_public_node
);
12475 /* First, make sure that any templates in base-classes are
12476 instantiated. This ensures that if we call ourselves recursively
12477 we do not get confused about which classes are marked and which
12479 basep
= &base_list
;
12482 tree basetype
= TREE_VALUE (*basep
);
12484 /* The dependent_type_p call below should really be dependent_scope_p
12485 so that we give a hard error about using an incomplete type as a
12486 base, but we allow it with a pedwarn for backward
12488 if (processing_template_decl
12489 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12490 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12491 if (!dependent_type_p (basetype
)
12492 && !complete_type_or_else (basetype
, NULL
))
12493 /* An incomplete type. Remove it from the list. */
12494 *basep
= TREE_CHAIN (*basep
);
12498 if (TREE_TYPE (*basep
))
12500 if (CLASS_TYPE_P (basetype
))
12501 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12502 basep
= &TREE_CHAIN (*basep
);
12506 TYPE_MARKED_P (ref
) = 1;
12508 /* The binfo slot should be empty, unless this is an (ill-formed)
12510 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12512 error ("redefinition of %q#T", ref
);
12516 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12518 binfo
= make_tree_binfo (max_bases
);
12520 TYPE_BINFO (ref
) = binfo
;
12521 BINFO_OFFSET (binfo
) = size_zero_node
;
12522 BINFO_TYPE (binfo
) = ref
;
12524 /* Apply base-class info set up to the variants of this type. */
12525 fixup_type_variants (ref
);
12529 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12530 /* An aggregate cannot have baseclasses. */
12531 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12533 if (TREE_CODE (ref
) == UNION_TYPE
)
12535 error ("derived union %qT invalid", ref
);
12542 if (TYPE_FOR_JAVA (ref
))
12544 error ("Java class %qT cannot have multiple bases", ref
);
12551 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12553 if (TYPE_FOR_JAVA (ref
))
12555 error ("Java class %qT cannot have virtual bases", ref
);
12560 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12562 tree access
= TREE_PURPOSE (base_list
);
12563 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12564 tree basetype
= TREE_VALUE (base_list
);
12566 if (access
== access_default_node
)
12567 access
= default_access
;
12569 if (PACK_EXPANSION_P (basetype
))
12570 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12571 if (TREE_CODE (basetype
) == TYPE_DECL
)
12572 basetype
= TREE_TYPE (basetype
);
12573 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12575 error ("base type %qT fails to be a struct or class type",
12580 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12581 TYPE_FOR_JAVA (ref
) = 1;
12583 base_binfo
= NULL_TREE
;
12584 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12586 base_binfo
= TYPE_BINFO (basetype
);
12587 /* The original basetype could have been a typedef'd type. */
12588 basetype
= BINFO_TYPE (base_binfo
);
12590 /* Inherit flags from the base. */
12591 TYPE_HAS_NEW_OPERATOR (ref
)
12592 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12593 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12594 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12595 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12596 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12597 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12598 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12599 CLASSTYPE_REPEATED_BASE_P (ref
)
12600 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12603 /* We must do this test after we've seen through a typedef
12605 if (TYPE_MARKED_P (basetype
))
12607 if (basetype
== ref
)
12608 error ("recursive type %qT undefined", basetype
);
12610 error ("duplicate base type %qT invalid", basetype
);
12614 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12615 /* Regenerate the pack expansion for the bases. */
12616 basetype
= make_pack_expansion (basetype
);
12618 TYPE_MARKED_P (basetype
) = 1;
12620 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12621 &igo_prev
, via_virtual
);
12622 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12623 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12625 BINFO_BASE_APPEND (binfo
, base_binfo
);
12626 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12629 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12630 /* If we didn't get max_vbases vbases, we must have shared at
12631 least one of them, and are therefore diamond shaped. */
12632 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12634 /* Unmark all the types. */
12635 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12636 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12637 TYPE_MARKED_P (ref
) = 0;
12639 /* Now see if we have a repeated base type. */
12640 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12642 for (base_binfo
= binfo
; base_binfo
;
12643 base_binfo
= TREE_CHAIN (base_binfo
))
12645 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12647 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12650 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12652 for (base_binfo
= binfo
; base_binfo
;
12653 base_binfo
= TREE_CHAIN (base_binfo
))
12654 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12655 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12664 /* Copies the enum-related properties from type SRC to type DST.
12665 Used with the underlying type of an enum and the enum itself. */
12667 copy_type_enum (tree dst
, tree src
)
12670 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12672 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12673 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12674 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12675 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12676 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12677 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12678 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12679 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12680 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12684 /* Begin compiling the definition of an enumeration type.
12687 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12689 UNDERLYING_TYPE is the type that will be used as the storage for
12690 the enumeration type. This should be NULL_TREE if no storage type
12693 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12695 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12697 Returns the type object, as yet incomplete.
12698 Also records info about it so that build_enumerator
12699 may be used to declare the individual values as they are read. */
12702 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12703 bool scoped_enum_p
, bool *is_new
)
12705 tree prevtype
= NULL_TREE
;
12706 gcc_assert (identifier_p (name
));
12710 /* [C++0x dcl.enum]p5:
12712 If not explicitly specified, the underlying type of a scoped
12713 enumeration type is int. */
12714 if (!underlying_type
&& scoped_enum_p
)
12715 underlying_type
= integer_type_node
;
12717 if (underlying_type
)
12718 underlying_type
= cv_unqualified (underlying_type
);
12720 /* If this is the real definition for a previous forward reference,
12721 fill in the contents in the same object that used to be the
12722 forward reference. */
12724 enumtype
= lookup_and_check_tag (enum_type
, name
,
12725 /*tag_scope=*/ts_current
,
12726 /*template_header_p=*/false);
12728 /* In case of a template_decl, the only check that should be deferred
12729 to instantiation time is the comparison of underlying types. */
12730 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12732 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12734 error_at (input_location
, "scoped/unscoped mismatch "
12735 "in enum %q#T", enumtype
);
12736 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12737 "previous definition here");
12738 enumtype
= error_mark_node
;
12740 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12742 error_at (input_location
, "underlying type mismatch "
12743 "in enum %q#T", enumtype
);
12744 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12745 "previous definition here");
12746 enumtype
= error_mark_node
;
12748 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12749 && !dependent_type_p (underlying_type
)
12750 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12751 && !same_type_p (underlying_type
,
12752 ENUM_UNDERLYING_TYPE (enumtype
)))
12754 error_at (input_location
, "different underlying type "
12755 "in enum %q#T", enumtype
);
12756 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12757 "previous definition here");
12758 underlying_type
= NULL_TREE
;
12762 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12763 || processing_template_decl
)
12765 /* In case of error, make a dummy enum to allow parsing to
12767 if (enumtype
== error_mark_node
)
12769 name
= make_anon_name ();
12770 enumtype
= NULL_TREE
;
12773 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12774 of an opaque enum, or an opaque enum of an already defined
12775 enumeration (C++0x only).
12776 In any other case, it'll be NULL_TREE. */
12782 prevtype
= enumtype
;
12784 /* Do not push the decl more than once, unless we need to
12785 compare underlying types at instantiation time */
12787 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12788 || (underlying_type
12789 && dependent_type_p (underlying_type
))
12790 || (ENUM_UNDERLYING_TYPE (enumtype
)
12791 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12793 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12794 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12797 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12800 if (enumtype
== error_mark_node
)
12801 return error_mark_node
;
12803 /* The enum is considered opaque until the opening '{' of the
12804 enumerator list. */
12805 SET_OPAQUE_ENUM_P (enumtype
, true);
12806 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12809 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12811 if (underlying_type
)
12813 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12815 copy_type_enum (enumtype
, underlying_type
);
12816 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12818 else if (dependent_type_p (underlying_type
))
12819 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12821 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12822 underlying_type
, enumtype
);
12825 /* If into a template class, the returned enum is always the first
12826 declaration (opaque or not) seen. This way all the references to
12827 this type will be to the same declaration. The following ones are used
12828 only to check for definition errors. */
12829 if (prevtype
&& processing_template_decl
)
12835 /* After processing and defining all the values of an enumeration type,
12836 install their decls in the enumeration type.
12837 ENUMTYPE is the type object. */
12840 finish_enum_value_list (tree enumtype
)
12843 tree underlying_type
;
12846 tree minnode
, maxnode
;
12849 bool fixed_underlying_type_p
12850 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12852 /* We built up the VALUES in reverse order. */
12853 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12855 /* For an enum defined in a template, just set the type of the values;
12856 all further processing is postponed until the template is
12857 instantiated. We need to set the type so that tsubst of a CONST_DECL
12859 if (processing_template_decl
)
12861 for (values
= TYPE_VALUES (enumtype
);
12863 values
= TREE_CHAIN (values
))
12864 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12868 /* Determine the minimum and maximum values of the enumerators. */
12869 if (TYPE_VALUES (enumtype
))
12871 minnode
= maxnode
= NULL_TREE
;
12873 for (values
= TYPE_VALUES (enumtype
);
12875 values
= TREE_CHAIN (values
))
12877 decl
= TREE_VALUE (values
);
12879 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12880 each enumerator has the type of its enumeration. Prior to the
12881 closing brace, the type of each enumerator is the type of its
12882 initializing value. */
12883 TREE_TYPE (decl
) = enumtype
;
12885 /* Update the minimum and maximum values, if appropriate. */
12886 value
= DECL_INITIAL (decl
);
12887 if (value
== error_mark_node
)
12888 value
= integer_zero_node
;
12889 /* Figure out what the minimum and maximum values of the
12890 enumerators are. */
12892 minnode
= maxnode
= value
;
12893 else if (tree_int_cst_lt (maxnode
, value
))
12895 else if (tree_int_cst_lt (value
, minnode
))
12902 If the enumerator-list is empty, the underlying type is as if
12903 the enumeration had a single enumerator with value 0. */
12904 minnode
= maxnode
= integer_zero_node
;
12906 if (!fixed_underlying_type_p
)
12908 /* Compute the number of bits require to represent all values of the
12909 enumeration. We must do this before the type of MINNODE and
12910 MAXNODE are transformed, since tree_int_cst_min_precision relies
12911 on the TREE_TYPE of the value it is passed. */
12912 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12913 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12914 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12915 int precision
= MAX (lowprec
, highprec
);
12917 bool use_short_enum
;
12919 /* Determine the underlying type of the enumeration.
12923 The underlying type of an enumeration is an integral type that
12924 can represent all the enumerator values defined in the
12925 enumeration. It is implementation-defined which integral type is
12926 used as the underlying type for an enumeration except that the
12927 underlying type shall not be larger than int unless the value of
12928 an enumerator cannot fit in an int or unsigned int.
12930 We use "int" or an "unsigned int" as the underlying type, even if
12931 a smaller integral type would work, unless the user has
12932 explicitly requested that we use the smallest possible type. The
12933 user can request that for all enumerations with a command line
12934 flag, or for just one enumeration with an attribute. */
12936 use_short_enum
= flag_short_enums
12937 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12939 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12943 underlying_type
= integer_types
[itk
];
12944 if (underlying_type
!= NULL_TREE
12945 && TYPE_PRECISION (underlying_type
) >= precision
12946 && TYPE_SIGN (underlying_type
) == sgn
)
12949 if (itk
== itk_none
)
12953 IF no integral type can represent all the enumerator values, the
12954 enumeration is ill-formed. */
12955 error ("no integral type can represent all of the enumerator values "
12956 "for %qT", enumtype
);
12957 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12958 underlying_type
= integer_types
[itk_unsigned_long_long
];
12963 The value of sizeof() applied to an enumeration type, an object
12964 of an enumeration type, or an enumerator, is the value of sizeof()
12965 applied to the underlying type. */
12966 copy_type_enum (enumtype
, underlying_type
);
12968 /* Compute the minimum and maximum values for the type.
12972 For an enumeration where emin is the smallest enumerator and emax
12973 is the largest, the values of the enumeration are the values of the
12974 underlying type in the range bmin to bmax, where bmin and bmax are,
12975 respectively, the smallest and largest values of the smallest bit-
12976 field that can store emin and emax. */
12978 /* The middle-end currently assumes that types with TYPE_PRECISION
12979 narrower than their underlying type are suitably zero or sign
12980 extended to fill their mode. Similarly, it assumes that the front
12981 end assures that a value of a particular type must be within
12982 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12984 We used to set these fields based on bmin and bmax, but that led
12985 to invalid assumptions like optimizing away bounds checking. So
12986 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12987 TYPE_MAX_VALUE to the values for the mode above and only restrict
12988 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12989 ENUM_UNDERLYING_TYPE (enumtype
)
12990 = build_distinct_type_copy (underlying_type
);
12991 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12992 set_min_and_max_values_for_integral_type
12993 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12995 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12996 if (flag_strict_enums
)
12997 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
13000 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13002 /* Convert each of the enumerators to the type of the underlying
13003 type of the enumeration. */
13004 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13006 location_t saved_location
;
13008 decl
= TREE_VALUE (values
);
13009 saved_location
= input_location
;
13010 input_location
= DECL_SOURCE_LOCATION (decl
);
13011 if (fixed_underlying_type_p
)
13012 /* If the enumeration type has a fixed underlying type, we
13013 already checked all of the enumerator values. */
13014 value
= DECL_INITIAL (decl
);
13016 value
= perform_implicit_conversion (underlying_type
,
13017 DECL_INITIAL (decl
),
13018 tf_warning_or_error
);
13019 input_location
= saved_location
;
13021 /* Do not clobber shared ints. */
13022 value
= copy_node (value
);
13024 TREE_TYPE (value
) = enumtype
;
13025 DECL_INITIAL (decl
) = value
;
13028 /* Fix up all variant types of this enum type. */
13029 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13030 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13032 if (at_class_scope_p ()
13033 && COMPLETE_TYPE_P (current_class_type
)
13034 && UNSCOPED_ENUM_P (enumtype
))
13035 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13036 current_class_type
);
13038 /* Finish debugging output for this type. */
13039 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13042 /* Finishes the enum type. This is called only the first time an
13043 enumeration is seen, be it opaque or odinary.
13044 ENUMTYPE is the type object. */
13047 finish_enum (tree enumtype
)
13049 if (processing_template_decl
)
13051 if (at_function_scope_p ())
13052 add_stmt (build_min (TAG_DEFN
, enumtype
));
13056 /* If this is a forward declaration, there should not be any variants,
13057 though we can get a variant in the middle of an enum-specifier with
13058 wacky code like 'enum E { e = sizeof(const E*) };' */
13059 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13060 && (TYPE_VALUES (enumtype
)
13061 || !TYPE_NEXT_VARIANT (enumtype
)));
13064 /* Build and install a CONST_DECL for an enumeration constant of the
13065 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13066 LOC is the location of NAME.
13067 Assignment of sequential values by default is handled here. */
13070 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
13076 /* scalar_constant_value will pull out this expression, so make sure
13077 it's folded as appropriate. */
13078 if (processing_template_decl
)
13079 value
= fold_non_dependent_expr (value
);
13081 /* If the VALUE was erroneous, pretend it wasn't there; that will
13082 result in the enum being assigned the next value in sequence. */
13083 if (value
== error_mark_node
)
13086 /* Remove no-op casts from the value. */
13088 STRIP_TYPE_NOPS (value
);
13090 if (! processing_template_decl
)
13092 /* Validate and default VALUE. */
13093 if (value
!= NULL_TREE
)
13095 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13097 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13102 else if (! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13103 value
= perform_implicit_conversion_flags
13104 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13105 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13107 if (value
== error_mark_node
)
13110 if (value
!= NULL_TREE
)
13112 value
= cxx_constant_value (value
);
13114 if (TREE_CODE (value
) != INTEGER_CST
13115 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13117 error ("enumerator value for %qD is not an integer constant",
13124 /* Default based on previous value. */
13125 if (value
== NULL_TREE
)
13127 if (TYPE_VALUES (enumtype
))
13132 /* C++03 7.2/4: If no initializer is specified for the first
13133 enumerator, the type is an unspecified integral
13134 type. Otherwise the type is the same as the type of the
13135 initializing value of the preceding enumerator unless the
13136 incremented value is not representable in that type, in
13137 which case the type is an unspecified integral type
13138 sufficient to contain the incremented value. */
13139 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13140 if (error_operand_p (prev_value
))
13141 value
= error_mark_node
;
13144 tree type
= TREE_TYPE (prev_value
);
13145 signop sgn
= TYPE_SIGN (type
);
13146 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13150 bool pos
= !wi::neg_p (wi
, sgn
);
13151 if (!wi::fits_to_tree_p (wi
, type
))
13154 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13156 type
= integer_types
[itk
];
13157 if (type
!= NULL_TREE
13158 && (pos
|| !TYPE_UNSIGNED (type
))
13159 && wi::fits_to_tree_p (wi
, type
))
13162 if (type
&& cxx_dialect
< cxx11
13163 && itk
> itk_unsigned_long
)
13164 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13165 incremented enumerator value is too large for %<unsigned long%>" : "\
13166 incremented enumerator value is too large for %<long%>");
13168 if (type
== NULL_TREE
)
13171 value
= wide_int_to_tree (type
, wi
);
13176 error ("overflow in enumeration values at %qD", name
);
13177 value
= error_mark_node
;
13182 value
= integer_zero_node
;
13185 /* Remove no-op casts from the value. */
13186 STRIP_TYPE_NOPS (value
);
13188 /* If the underlying type of the enum is fixed, check whether
13189 the enumerator values fits in the underlying type. If it
13190 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13191 if (ENUM_UNDERLYING_TYPE (enumtype
)
13193 && TREE_CODE (value
) == INTEGER_CST
)
13195 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13196 error ("enumerator value %E is outside the range of underlying "
13197 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13199 /* Convert the value to the appropriate type. */
13200 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13204 /* C++ associates enums with global, function, or class declarations. */
13205 context
= current_scope ();
13207 /* Build the actual enumeration constant. Note that the enumeration
13208 constants have the underlying type of the enum (if it is fixed)
13209 or the type of their initializer (if the underlying type of the
13210 enum is not fixed):
13214 If the underlying type is fixed, the type of each enumerator
13215 prior to the closing brace is the underlying type; if the
13216 initializing value of an enumerator cannot be represented by
13217 the underlying type, the program is ill-formed. If the
13218 underlying type is not fixed, the type of each enumerator is
13219 the type of its initializing value.
13221 If the underlying type is not fixed, it will be computed by
13222 finish_enum and we will reset the type of this enumerator. Of
13223 course, if we're processing a template, there may be no value. */
13224 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13226 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13228 DECL_CONTEXT (decl
) = enumtype
;
13229 TREE_CONSTANT (decl
) = 1;
13230 TREE_READONLY (decl
) = 1;
13231 DECL_INITIAL (decl
) = value
;
13233 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13234 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13235 on the TYPE_FIELDS list for `S'. (That's so that you can say
13236 things like `S::i' later.) */
13237 finish_member_declaration (decl
);
13241 /* Add this enumeration constant to the list for this type. */
13242 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13245 /* Look for an enumerator with the given NAME within the enumeration
13246 type ENUMTYPE. This routine is used primarily for qualified name
13247 lookup into an enumerator in C++0x, e.g.,
13249 enum class Color { Red, Green, Blue };
13251 Color color = Color::Red;
13253 Returns the value corresponding to the enumerator, or
13254 NULL_TREE if no such enumerator was found. */
13256 lookup_enumerator (tree enumtype
, tree name
)
13259 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13261 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13262 return e
? TREE_VALUE (e
) : NULL_TREE
;
13266 /* We're defining DECL. Make sure that its type is OK. */
13269 check_function_type (tree decl
, tree current_function_parms
)
13271 tree fntype
= TREE_TYPE (decl
);
13272 tree return_type
= complete_type (TREE_TYPE (fntype
));
13274 /* In a function definition, arg types must be complete. */
13275 require_complete_types_for_parms (current_function_parms
);
13277 if (dependent_type_p (return_type
)
13278 || type_uses_auto (return_type
))
13280 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13281 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13283 tree args
= TYPE_ARG_TYPES (fntype
);
13285 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13286 error ("return type %q#T is incomplete", return_type
);
13288 error ("return type has Java class type %q#T", return_type
);
13290 /* Make it return void instead. */
13291 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13292 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13294 TREE_CHAIN (args
));
13296 fntype
= build_function_type (void_type_node
, args
);
13298 = build_exception_variant (fntype
,
13299 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13300 fntype
= (cp_build_type_attribute_variant
13301 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13302 TREE_TYPE (decl
) = fntype
;
13305 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13308 /* Create the FUNCTION_DECL for a function definition.
13309 DECLSPECS and DECLARATOR are the parts of the declaration;
13310 they describe the function's name and the type it returns,
13311 but twisted together in a fashion that parallels the syntax of C.
13313 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13314 DECLARATOR is really the DECL for the function we are about to
13315 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13316 indicating that the function is an inline defined in-class.
13318 This function creates a binding context for the function body
13319 as well as setting up the FUNCTION_DECL in current_function_decl.
13321 For C++, we must first check whether that datum makes any sense.
13322 For example, "class A local_a(1,2);" means that variable local_a
13323 is an aggregate of type A, which should have a constructor
13324 applied to it with the argument list [1, 2].
13326 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13327 or may be a BLOCK if the function has been defined previously
13328 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13329 error_mark_node if the function has never been defined, or
13330 a BLOCK if the function has been defined somewhere. */
13333 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13335 tree ctype
= NULL_TREE
;
13338 int doing_friend
= 0;
13339 cp_binding_level
*bl
;
13340 tree current_function_parms
;
13341 struct c_fileinfo
*finfo
13342 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13343 bool honor_interface
;
13345 /* Sanity check. */
13346 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13347 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13349 fntype
= TREE_TYPE (decl1
);
13350 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13351 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13353 /* ISO C++ 11.4/5. A friend function defined in a class is in
13354 the (lexical) scope of the class in which it is defined. */
13355 if (!ctype
&& DECL_FRIEND_P (decl1
))
13357 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13359 /* CTYPE could be null here if we're dealing with a template;
13360 for example, `inline friend float foo()' inside a template
13361 will have no CTYPE set. */
13362 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13368 if (DECL_DECLARED_INLINE_P (decl1
)
13369 && lookup_attribute ("noinline", attrs
))
13370 warning (0, "inline function %q+D given attribute noinline", decl1
);
13372 /* Handle gnu_inline attribute. */
13373 if (GNU_INLINE_P (decl1
))
13375 DECL_EXTERNAL (decl1
) = 1;
13376 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13377 DECL_INTERFACE_KNOWN (decl1
) = 1;
13378 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13381 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13382 /* This is a constructor, we must ensure that any default args
13383 introduced by this definition are propagated to the clones
13384 now. The clones are used directly in overload resolution. */
13385 adjust_clone_args (decl1
);
13387 /* Sometimes we don't notice that a function is a static member, and
13388 build a METHOD_TYPE for it. Fix that up now. */
13389 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13390 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13392 /* Set up current_class_type, and enter the scope of the class, if
13395 push_nested_class (ctype
);
13396 else if (DECL_STATIC_FUNCTION_P (decl1
))
13397 push_nested_class (DECL_CONTEXT (decl1
));
13399 /* Now that we have entered the scope of the class, we must restore
13400 the bindings for any template parameters surrounding DECL1, if it
13401 is an inline member template. (Order is important; consider the
13402 case where a template parameter has the same name as a field of
13403 the class.) It is not until after this point that
13404 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13405 if (flags
& SF_INCLASS_INLINE
)
13406 maybe_begin_member_template_processing (decl1
);
13408 /* Effective C++ rule 15. */
13410 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13411 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13412 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13414 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13415 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13416 if (!DECL_INITIAL (decl1
))
13417 DECL_INITIAL (decl1
) = error_mark_node
;
13419 /* This function exists in static storage.
13420 (This does not mean `static' in the C sense!) */
13421 TREE_STATIC (decl1
) = 1;
13423 /* We must call push_template_decl after current_class_type is set
13424 up. (If we are processing inline definitions after exiting a
13425 class scope, current_class_type will be NULL_TREE until set above
13426 by push_nested_class.) */
13427 if (processing_template_decl
)
13429 tree newdecl1
= push_template_decl (decl1
);
13430 if (newdecl1
== error_mark_node
)
13432 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13433 pop_nested_class ();
13439 /* We are now in the scope of the function being defined. */
13440 current_function_decl
= decl1
;
13442 /* Save the parm names or decls from this function's declarator
13443 where store_parm_decls will find them. */
13444 current_function_parms
= DECL_ARGUMENTS (decl1
);
13446 /* Make sure the parameter and return types are reasonable. When
13447 you declare a function, these types can be incomplete, but they
13448 must be complete when you define the function. */
13449 check_function_type (decl1
, current_function_parms
);
13451 /* Build the return declaration for the function. */
13452 restype
= TREE_TYPE (fntype
);
13454 if (DECL_RESULT (decl1
) == NULL_TREE
)
13458 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13459 DECL_ARTIFICIAL (resdecl
) = 1;
13460 DECL_IGNORED_P (resdecl
) = 1;
13461 DECL_RESULT (decl1
) = resdecl
;
13463 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13466 /* Let the user know we're compiling this function. */
13467 announce_function (decl1
);
13469 /* Record the decl so that the function name is defined.
13470 If we already have a decl for this name, and it is a FUNCTION_DECL,
13471 use the old decl. */
13472 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13474 /* A specialization is not used to guide overload resolution. */
13475 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13476 && !(DECL_USE_TEMPLATE (decl1
) &&
13477 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13479 tree olddecl
= pushdecl (decl1
);
13481 if (olddecl
== error_mark_node
)
13482 /* If something went wrong when registering the declaration,
13483 use DECL1; we have to have a FUNCTION_DECL to use when
13484 parsing the body of the function. */
13488 /* Otherwise, OLDDECL is either a previous declaration
13489 of the same function or DECL1 itself. */
13491 if (warn_missing_declarations
13492 && olddecl
== decl1
13493 && !DECL_MAIN_P (decl1
)
13494 && TREE_PUBLIC (decl1
)
13495 && !DECL_DECLARED_INLINE_P (decl1
))
13499 /* Check whether DECL1 is in an anonymous
13501 for (context
= DECL_CONTEXT (decl1
);
13503 context
= DECL_CONTEXT (context
))
13505 if (TREE_CODE (context
) == NAMESPACE_DECL
13506 && DECL_NAME (context
) == NULL_TREE
)
13510 if (context
== NULL
)
13511 warning (OPT_Wmissing_declarations
,
13512 "no previous declaration for %q+D", decl1
);
13520 /* We need to set the DECL_CONTEXT. */
13521 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13522 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13524 fntype
= TREE_TYPE (decl1
);
13525 restype
= TREE_TYPE (fntype
);
13527 /* If #pragma weak applies, mark the decl appropriately now.
13528 The pragma only applies to global functions. Because
13529 determining whether or not the #pragma applies involves
13530 computing the mangled name for the declaration, we cannot
13531 apply the pragma until after we have merged this declaration
13532 with any previous declarations; if the original declaration
13533 has a linkage specification, that specification applies to
13534 the definition as well, and may affect the mangled name. */
13535 if (DECL_FILE_SCOPE_P (decl1
))
13536 maybe_apply_pragma_weak (decl1
);
13539 /* Reset this in case the call to pushdecl changed it. */
13540 current_function_decl
= decl1
;
13542 gcc_assert (DECL_INITIAL (decl1
));
13544 /* This function may already have been parsed, in which case just
13545 return; our caller will skip over the body without parsing. */
13546 if (DECL_INITIAL (decl1
) != error_mark_node
)
13549 /* Initialize RTL machinery. We cannot do this until
13550 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13551 even when processing a template; this is how we get
13552 CFUN set up, and our per-function variables initialized.
13553 FIXME factor out the non-RTL stuff. */
13554 bl
= current_binding_level
;
13555 allocate_struct_function (decl1
, processing_template_decl
);
13557 /* Initialize the language data structures. Whenever we start
13558 a new function, we destroy temporaries in the usual way. */
13559 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13560 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13561 current_binding_level
= bl
;
13563 if (!processing_template_decl
&& type_uses_auto (restype
))
13565 FNDECL_USED_AUTO (decl1
) = true;
13566 current_function_auto_return_pattern
= restype
;
13569 /* Start the statement-tree, start the tree now. */
13570 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13572 /* If we are (erroneously) defining a function that we have already
13573 defined before, wipe out what we knew before. */
13574 if (!DECL_PENDING_INLINE_P (decl1
))
13575 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13577 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13579 /* We know that this was set up by `grokclassfn'. We do not
13580 wait until `store_parm_decls', since evil parse errors may
13581 never get us to that point. Here we keep the consistency
13582 between `current_class_type' and `current_class_ptr'. */
13583 tree t
= DECL_ARGUMENTS (decl1
);
13585 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13586 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13588 cp_function_chain
->x_current_class_ref
13589 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13590 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13591 cp_function_chain
->x_current_class_ptr
= t
;
13593 /* Constructors and destructors need to know whether they're "in
13594 charge" of initializing virtual base classes. */
13595 t
= DECL_CHAIN (t
);
13596 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13598 current_in_charge_parm
= t
;
13599 t
= DECL_CHAIN (t
);
13601 if (DECL_HAS_VTT_PARM_P (decl1
))
13603 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13604 current_vtt_parm
= t
;
13608 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13609 /* Implicitly-defined methods (like the
13610 destructor for a class in which no destructor
13611 is explicitly declared) must not be defined
13612 until their definition is needed. So, we
13613 ignore interface specifications for
13614 compiler-generated functions. */
13615 && !DECL_ARTIFICIAL (decl1
));
13617 if (processing_template_decl
)
13618 /* Don't mess with interface flags. */;
13619 else if (DECL_INTERFACE_KNOWN (decl1
))
13621 tree ctx
= decl_function_context (decl1
);
13623 if (DECL_NOT_REALLY_EXTERN (decl1
))
13624 DECL_EXTERNAL (decl1
) = 0;
13626 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13627 /* This is a function in a local class in an extern inline
13628 or template function. */
13629 comdat_linkage (decl1
);
13631 /* If this function belongs to an interface, it is public.
13632 If it belongs to someone else's interface, it is also external.
13633 This only affects inlines and template instantiations. */
13634 else if (!finfo
->interface_unknown
&& honor_interface
)
13636 if (DECL_DECLARED_INLINE_P (decl1
)
13637 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13639 DECL_EXTERNAL (decl1
)
13640 = (finfo
->interface_only
13641 || (DECL_DECLARED_INLINE_P (decl1
)
13642 && ! flag_implement_inlines
13643 && !DECL_VINDEX (decl1
)));
13645 /* For WIN32 we also want to put these in linkonce sections. */
13646 maybe_make_one_only (decl1
);
13649 DECL_EXTERNAL (decl1
) = 0;
13650 DECL_INTERFACE_KNOWN (decl1
) = 1;
13651 /* If this function is in an interface implemented in this file,
13652 make sure that the back end knows to emit this function
13654 if (!DECL_EXTERNAL (decl1
))
13655 mark_needed (decl1
);
13657 else if (finfo
->interface_unknown
&& finfo
->interface_only
13658 && honor_interface
)
13660 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13661 interface, we will have both finfo->interface_unknown and
13662 finfo->interface_only set. In that case, we don't want to
13663 use the normal heuristics because someone will supply a
13664 #pragma implementation elsewhere, and deducing it here would
13665 produce a conflict. */
13666 comdat_linkage (decl1
);
13667 DECL_EXTERNAL (decl1
) = 0;
13668 DECL_INTERFACE_KNOWN (decl1
) = 1;
13669 DECL_DEFER_OUTPUT (decl1
) = 1;
13673 /* This is a definition, not a reference.
13674 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13675 if (!GNU_INLINE_P (decl1
))
13676 DECL_EXTERNAL (decl1
) = 0;
13678 if ((DECL_DECLARED_INLINE_P (decl1
)
13679 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13680 && ! DECL_INTERFACE_KNOWN (decl1
))
13681 DECL_DEFER_OUTPUT (decl1
) = 1;
13683 DECL_INTERFACE_KNOWN (decl1
) = 1;
13686 /* Determine the ELF visibility attribute for the function. We must not
13687 do this before calling "pushdecl", as we must allow "duplicate_decls"
13688 to merge any attributes appropriately. We also need to wait until
13690 if (!DECL_CLONED_FUNCTION_P (decl1
))
13691 determine_visibility (decl1
);
13693 if (!processing_template_decl
)
13694 maybe_instantiate_noexcept (decl1
);
13696 begin_scope (sk_function_parms
, decl1
);
13700 if (DECL_DESTRUCTOR_P (decl1
)
13701 || (DECL_CONSTRUCTOR_P (decl1
)
13702 && targetm
.cxx
.cdtor_returns_this ()))
13704 cdtor_label
= create_artificial_label (input_location
);
13707 start_fname_decls ();
13709 store_parm_decls (current_function_parms
);
13715 /* Like start_preparsed_function, except that instead of a
13716 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13718 Returns true on success. If the DECLARATOR is not suitable
13719 for a function, we return false, which tells the parser to
13720 skip the entire function. */
13723 start_function (cp_decl_specifier_seq
*declspecs
,
13724 const cp_declarator
*declarator
,
13729 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13730 if (decl1
== error_mark_node
)
13732 /* If the declarator is not suitable for a function definition,
13733 cause a syntax error. */
13734 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13736 error ("invalid function declaration");
13740 if (DECL_MAIN_P (decl1
))
13741 /* main must return int. grokfndecl should have corrected it
13742 (and issued a diagnostic) if the user got it wrong. */
13743 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13744 integer_type_node
));
13746 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13749 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13753 use_eh_spec_block (tree fn
)
13755 return (flag_exceptions
&& flag_enforce_eh_specs
13756 && !processing_template_decl
13757 && !type_throw_all_p (TREE_TYPE (fn
))
13758 /* We insert the EH_SPEC_BLOCK only in the original
13759 function; then, it is copied automatically to the
13761 && !DECL_CLONED_FUNCTION_P (fn
)
13762 /* Implicitly-generated constructors and destructors have
13763 exception specifications. However, those specifications
13764 are the union of the possible exceptions specified by the
13765 constructors/destructors for bases and members, so no
13766 unallowed exception will ever reach this function. By
13767 not creating the EH_SPEC_BLOCK we save a little memory,
13768 and we avoid spurious warnings about unreachable
13770 && !DECL_DEFAULTED_FN (fn
));
13773 /* Store the parameter declarations into the current function declaration.
13774 This is called after parsing the parameter declarations, before
13775 digesting the body of the function.
13777 Also install to binding contour return value identifier, if any. */
13780 store_parm_decls (tree current_function_parms
)
13782 tree fndecl
= current_function_decl
;
13785 /* This is a chain of any other decls that came in among the parm
13786 declarations. If a parm is declared with enum {foo, bar} x;
13787 then CONST_DECLs for foo and bar are put here. */
13788 tree nonparms
= NULL_TREE
;
13790 if (current_function_parms
)
13792 /* This case is when the function was defined with an ANSI prototype.
13793 The parms already have decls, so we need not do anything here
13794 except record them as in effect
13795 and complain if any redundant old-style parm decls were written. */
13797 tree specparms
= current_function_parms
;
13800 /* Must clear this because it might contain TYPE_DECLs declared
13802 current_binding_level
->names
= NULL
;
13804 /* If we're doing semantic analysis, then we'll call pushdecl
13805 for each of these. We must do them in reverse order so that
13806 they end in the correct forward order. */
13807 specparms
= nreverse (specparms
);
13809 for (parm
= specparms
; parm
; parm
= next
)
13811 next
= DECL_CHAIN (parm
);
13812 if (TREE_CODE (parm
) == PARM_DECL
)
13814 if (DECL_NAME (parm
) == NULL_TREE
13815 || !VOID_TYPE_P (parm
))
13818 error ("parameter %qD declared void", parm
);
13822 /* If we find an enum constant or a type tag,
13823 put it aside for the moment. */
13824 TREE_CHAIN (parm
) = NULL_TREE
;
13825 nonparms
= chainon (nonparms
, parm
);
13829 /* Get the decls in their original chain order and record in the
13830 function. This is all and only the PARM_DECLs that were
13831 pushed into scope by the loop above. */
13832 DECL_ARGUMENTS (fndecl
) = getdecls ();
13835 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13837 /* Now store the final chain of decls for the arguments
13838 as the decl-chain of the current lexical scope.
13839 Put the enumerators in as well, at the front so that
13840 DECL_ARGUMENTS is not modified. */
13841 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13843 if (use_eh_spec_block (current_function_decl
))
13844 current_eh_spec_block
= begin_eh_spec_block ();
13848 /* We have finished doing semantic analysis on DECL, but have not yet
13849 generated RTL for its body. Save away our current state, so that
13850 when we want to generate RTL later we know what to do. */
13853 save_function_data (tree decl
)
13855 struct language_function
*f
;
13857 /* Save the language-specific per-function data so that we can
13858 get it back when we really expand this function. */
13859 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13862 f
= ggc_alloc
<language_function
> ();
13863 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13864 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13866 /* Clear out the bits we don't need. */
13867 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13868 f
->bindings
= NULL
;
13869 f
->x_local_names
= NULL
;
13870 f
->base
.local_typedefs
= NULL
;
13874 /* Set the return value of the constructor (if present). */
13877 finish_constructor_body (void)
13882 if (targetm
.cxx
.cdtor_returns_this ()
13883 && (! TYPE_FOR_JAVA (current_class_type
)))
13885 /* Any return from a constructor will end up here. */
13886 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13888 val
= DECL_ARGUMENTS (current_function_decl
);
13889 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13890 DECL_RESULT (current_function_decl
), val
);
13891 /* Return the address of the object. */
13892 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13893 add_stmt (exprstmt
);
13897 /* Do all the processing for the beginning of a destructor; set up the
13898 vtable pointers and cleanups for bases and members. */
13901 begin_destructor_body (void)
13903 tree compound_stmt
;
13905 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13906 issued an error message. We still want to try to process the
13907 body of the function, but initialize_vtbl_ptrs will crash if
13908 TYPE_BINFO is NULL. */
13909 if (COMPLETE_TYPE_P (current_class_type
))
13911 compound_stmt
= begin_compound_stmt (0);
13912 /* Make all virtual function table pointers in non-virtual base
13913 classes point to CURRENT_CLASS_TYPE's virtual function
13915 initialize_vtbl_ptrs (current_class_ptr
);
13916 finish_compound_stmt (compound_stmt
);
13918 if (flag_lifetime_dse
)
13920 /* Insert a cleanup to let the back end know that the object is dead
13921 when we exit the destructor, either normally or via exception. */
13922 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13923 tree clobber
= build_constructor (btype
, NULL
);
13924 TREE_THIS_VOLATILE (clobber
) = true;
13925 tree bref
= build_nop (build_reference_type (btype
),
13926 current_class_ptr
);
13927 bref
= convert_from_reference (bref
);
13928 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13929 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13932 /* And insert cleanups for our bases and members so that they
13933 will be properly destroyed if we throw. */
13934 push_base_cleanups ();
13938 /* At the end of every destructor we generate code to delete the object if
13939 necessary. Do that now. */
13942 finish_destructor_body (void)
13946 /* Any return from a destructor will end up here; that way all base
13947 and member cleanups will be run when the function returns. */
13948 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13950 /* In a virtual destructor, we must call delete. */
13951 if (DECL_VIRTUAL_P (current_function_decl
))
13954 tree virtual_size
= cxx_sizeof (current_class_type
);
13958 At the point of definition of a virtual destructor (including
13959 an implicit definition), non-placement operator delete shall
13960 be looked up in the scope of the destructor's class and if
13961 found shall be accessible and unambiguous. */
13962 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13964 /*global_p=*/false,
13965 /*placement=*/NULL_TREE
,
13966 /*alloc_fn=*/NULL_TREE
,
13967 tf_warning_or_error
);
13969 if_stmt
= begin_if_stmt ();
13970 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13971 current_in_charge_parm
,
13974 finish_expr_stmt (exprstmt
);
13975 finish_then_clause (if_stmt
);
13976 finish_if_stmt (if_stmt
);
13979 if (targetm
.cxx
.cdtor_returns_this ())
13983 val
= DECL_ARGUMENTS (current_function_decl
);
13984 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13985 DECL_RESULT (current_function_decl
), val
);
13986 /* Return the address of the object. */
13987 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13988 add_stmt (exprstmt
);
13992 /* Do the necessary processing for the beginning of a function body, which
13993 in this case includes member-initializers, but not the catch clauses of
13994 a function-try-block. Currently, this means opening a binding level
13995 for the member-initializers (in a ctor), member cleanups (in a dtor),
13996 and capture proxies (in a lambda operator()). */
13999 begin_function_body (void)
14003 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14006 if (processing_template_decl
)
14007 /* Do nothing now. */;
14009 /* Always keep the BLOCK node associated with the outermost pair of
14010 curly braces of a function. These are needed for correct
14011 operation of dwarfout.c. */
14012 keep_next_level (true);
14014 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14016 if (processing_template_decl
)
14017 /* Do nothing now. */;
14018 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14019 begin_destructor_body ();
14024 /* Do the processing for the end of a function body. Currently, this means
14025 closing out the cleanups for fully-constructed bases and members, and in
14026 the case of the destructor, deleting the object if desired. Again, this
14027 is only meaningful for [cd]tors, since they are the only functions where
14028 there is a significant distinction between the main body and any
14029 function catch clauses. Handling, say, main() return semantics here
14030 would be wrong, as flowing off the end of a function catch clause for
14031 main() would also need to return 0. */
14034 finish_function_body (tree compstmt
)
14036 if (compstmt
== NULL_TREE
)
14039 /* Close the block. */
14040 finish_compound_stmt (compstmt
);
14042 if (processing_template_decl
)
14043 /* Do nothing now. */;
14044 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14045 finish_constructor_body ();
14046 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14047 finish_destructor_body ();
14050 /* Given a function, returns the BLOCK corresponding to the outermost level
14051 of curly braces, skipping the artificial block created for constructor
14055 outer_curly_brace_block (tree fndecl
)
14057 tree block
= DECL_INITIAL (fndecl
);
14058 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14060 block
= BLOCK_SUBBLOCKS (block
);
14061 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14063 block
= BLOCK_SUBBLOCKS (block
);
14064 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14068 /* If FNDECL is a class's key method, add the class to the list of
14069 keyed classes that should be emitted. */
14072 record_key_method_defined (tree fndecl
)
14074 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14075 && DECL_VIRTUAL_P (fndecl
)
14076 && !processing_template_decl
)
14078 tree fnclass
= DECL_CONTEXT (fndecl
);
14079 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14080 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14084 /* Subroutine of finish_function.
14085 Save the body of constexpr functions for possible
14086 future compile time evaluation. */
14089 maybe_save_function_definition (tree fun
)
14091 if (!processing_template_decl
14092 && DECL_DECLARED_CONSTEXPR_P (fun
)
14093 && !cp_function_chain
->invalid_constexpr
14094 && !DECL_CLONED_FUNCTION_P (fun
))
14095 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14098 /* Finish up a function declaration and compile that function
14099 all the way to assembler language output. The free the storage
14100 for the function definition.
14102 FLAGS is a bitwise or of the following values:
14104 We just finished processing the body of an in-class inline
14105 function definition. (This processing will have taken place
14106 after the class definition is complete.) */
14109 finish_function (int flags
)
14111 tree fndecl
= current_function_decl
;
14112 tree fntype
, ctype
= NULL_TREE
;
14113 int inclass_inline
= (flags
& 2) != 0;
14115 /* When we get some parse errors, we can end up without a
14116 current_function_decl, so cope. */
14117 if (fndecl
== NULL_TREE
)
14118 return error_mark_node
;
14120 if (c_dialect_objc ())
14121 objc_finish_function ();
14123 gcc_assert (!defer_mark_used_calls
);
14124 defer_mark_used_calls
= true;
14126 record_key_method_defined (fndecl
);
14128 fntype
= TREE_TYPE (fndecl
);
14130 /* TREE_READONLY (fndecl) = 1;
14131 This caused &foo to be of type ptr-to-const-function
14132 which then got a warning when stored in a ptr-to-function variable. */
14134 gcc_assert (building_stmt_list_p ());
14135 /* The current function is being defined, so its DECL_INITIAL should
14136 be set, and unless there's a multiple definition, it should be
14137 error_mark_node. */
14138 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14140 /* For a cloned function, we've already got all the code we need;
14141 there's no need to add any extra bits. */
14142 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14144 /* Make it so that `main' always returns 0 by default. */
14145 if (DECL_MAIN_P (current_function_decl
))
14146 finish_return_stmt (integer_zero_node
);
14148 if (use_eh_spec_block (current_function_decl
))
14149 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14150 (TREE_TYPE (current_function_decl
)),
14151 current_eh_spec_block
);
14154 /* If we're saving up tree structure, tie off the function now. */
14155 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14157 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14158 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14160 finish_fname_decls ();
14162 /* If this function can't throw any exceptions, remember that. */
14163 if (!processing_template_decl
14164 && !cp_function_chain
->can_throw
14165 && !flag_non_call_exceptions
14166 && !decl_replaceable_p (fndecl
))
14167 TREE_NOTHROW (fndecl
) = 1;
14169 /* This must come after expand_function_end because cleanups might
14170 have declarations (from inline functions) that need to go into
14171 this function's blocks. */
14173 /* If the current binding level isn't the outermost binding level
14174 for this function, either there is a bug, or we have experienced
14175 syntax errors and the statement tree is malformed. */
14176 if (current_binding_level
->kind
!= sk_function_parms
)
14178 /* Make sure we have already experienced errors. */
14179 gcc_assert (errorcount
);
14181 /* Throw away the broken statement tree and extra binding
14183 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14185 while (current_binding_level
->kind
!= sk_function_parms
)
14187 if (current_binding_level
->kind
== sk_class
)
14188 pop_nested_class ();
14190 poplevel (0, 0, 0);
14193 poplevel (1, 0, 1);
14195 /* Statements should always be full-expressions at the outermost set
14196 of curly braces for a function. */
14197 gcc_assert (stmts_are_full_exprs_p ());
14199 /* If there are no return statements in a function with auto return type,
14200 the return type is void. But if the declared type is something like
14201 auto*, this is an error. */
14202 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14203 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14205 if (!is_auto (current_function_auto_return_pattern
)
14206 && !current_function_returns_value
&& !current_function_returns_null
)
14208 error ("no return statements in function returning %qT",
14209 current_function_auto_return_pattern
);
14210 inform (input_location
, "only plain %<auto%> return type can be "
14211 "deduced to %<void%>");
14213 apply_deduced_return_type (fndecl
, void_type_node
);
14214 fntype
= TREE_TYPE (fndecl
);
14217 /* Save constexpr function body before it gets munged by
14218 the NRV transformation. */
14219 maybe_save_function_definition (fndecl
);
14221 /* Set up the named return value optimization, if we can. Candidate
14222 variables are selected in check_return_expr. */
14223 if (current_function_return_value
)
14225 tree r
= current_function_return_value
;
14228 if (r
!= error_mark_node
14229 /* This is only worth doing for fns that return in memory--and
14230 simpler, since we don't have to worry about promoted modes. */
14231 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14232 /* Only allow this for variables declared in the outer scope of
14233 the function so we know that their lifetime always ends with a
14234 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14235 we were to do this optimization in tree-ssa. */
14236 && (outer
= outer_curly_brace_block (fndecl
))
14237 && chain_member (r
, BLOCK_VARS (outer
)))
14238 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14240 current_function_return_value
= NULL_TREE
;
14243 /* Remember that we were in class scope. */
14244 if (current_class_name
)
14245 ctype
= current_class_type
;
14247 /* Must mark the RESULT_DECL as being in this function. */
14248 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14250 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14251 to the FUNCTION_DECL node itself. */
14252 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14254 /* Save away current state, if appropriate. */
14255 if (!processing_template_decl
)
14256 save_function_data (fndecl
);
14258 /* Complain if there's just no return statement. */
14259 if (warn_return_type
14260 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14261 && !dependent_type_p (TREE_TYPE (fntype
))
14262 && !current_function_returns_value
&& !current_function_returns_null
14263 /* Don't complain if we abort or throw. */
14264 && !current_function_returns_abnormally
14265 /* Don't complain if there's an infinite loop. */
14266 && !current_function_infinite_loop
14267 /* Don't complain if we are declared noreturn. */
14268 && !TREE_THIS_VOLATILE (fndecl
)
14269 && !DECL_NAME (DECL_RESULT (fndecl
))
14270 && !TREE_NO_WARNING (fndecl
)
14271 /* Structor return values (if any) are set by the compiler. */
14272 && !DECL_CONSTRUCTOR_P (fndecl
)
14273 && !DECL_DESTRUCTOR_P (fndecl
)
14274 && targetm
.warn_func_return (fndecl
))
14276 warning (OPT_Wreturn_type
,
14277 "no return statement in function returning non-void");
14278 TREE_NO_WARNING (fndecl
) = 1;
14281 /* Store the end of the function, so that we get good line number
14282 info for the epilogue. */
14283 cfun
->function_end_locus
= input_location
;
14285 /* Complain about parameters that are only set, but never otherwise used. */
14286 if (warn_unused_but_set_parameter
14287 && !processing_template_decl
14288 && errorcount
== unused_but_set_errorcount
14289 && !DECL_CLONED_FUNCTION_P (fndecl
))
14293 for (decl
= DECL_ARGUMENTS (fndecl
);
14295 decl
= DECL_CHAIN (decl
))
14296 if (TREE_USED (decl
)
14297 && TREE_CODE (decl
) == PARM_DECL
14298 && !DECL_READ_P (decl
)
14299 && DECL_NAME (decl
)
14300 && !DECL_ARTIFICIAL (decl
)
14301 && !TREE_NO_WARNING (decl
)
14302 && !DECL_IN_SYSTEM_HEADER (decl
)
14303 && TREE_TYPE (decl
) != error_mark_node
14304 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14305 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14306 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14307 warning (OPT_Wunused_but_set_parameter
,
14308 "parameter %q+D set but not used", decl
);
14309 unused_but_set_errorcount
= errorcount
;
14312 /* Complain about locally defined typedefs that are not used in this
14314 maybe_warn_unused_local_typedefs ();
14316 /* Genericize before inlining. */
14317 if (!processing_template_decl
)
14319 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14320 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14321 cp_genericize (fndecl
);
14322 /* Clear out the bits we don't need. */
14323 f
->x_current_class_ptr
= NULL
;
14324 f
->x_current_class_ref
= NULL
;
14325 f
->x_eh_spec_block
= NULL
;
14326 f
->x_in_charge_parm
= NULL
;
14327 f
->x_vtt_parm
= NULL
;
14328 f
->x_return_value
= NULL
;
14329 f
->bindings
= NULL
;
14330 f
->extern_decl_map
= NULL
;
14331 f
->infinite_loops
= NULL
;
14333 /* Clear out the bits we don't need. */
14334 local_names
= NULL
;
14336 /* We're leaving the context of this function, so zap cfun. It's still in
14337 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14339 current_function_decl
= NULL
;
14341 /* If this is an in-class inline definition, we may have to pop the
14342 bindings for the template parameters that we added in
14343 maybe_begin_member_template_processing when start_function was
14345 if (inclass_inline
)
14346 maybe_end_member_template_processing ();
14348 /* Leave the scope of the class. */
14350 pop_nested_class ();
14355 current_function_decl
= NULL_TREE
;
14357 defer_mark_used_calls
= false;
14358 if (deferred_mark_used_calls
)
14363 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14365 vec_free (deferred_mark_used_calls
);
14371 /* Create the FUNCTION_DECL for a function definition.
14372 DECLSPECS and DECLARATOR are the parts of the declaration;
14373 they describe the return type and the name of the function,
14374 but twisted together in a fashion that parallels the syntax of C.
14376 This function creates a binding context for the function body
14377 as well as setting up the FUNCTION_DECL in current_function_decl.
14379 Returns a FUNCTION_DECL on success.
14381 If the DECLARATOR is not suitable for a function (it defines a datum
14382 instead), we return 0, which tells yyparse to report a parse error.
14384 May return void_type_node indicating that this method is actually
14385 a friend. See grokfield for more details.
14387 Came here with a `.pushlevel' .
14389 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14390 CHANGES TO CODE IN `grokfield'. */
14393 grokmethod (cp_decl_specifier_seq
*declspecs
,
14394 const cp_declarator
*declarator
, tree attrlist
)
14396 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14399 if (fndecl
== error_mark_node
)
14400 return error_mark_node
;
14402 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14404 error ("invalid member function declaration");
14405 return error_mark_node
;
14409 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14411 /* Pass friends other than inline friend functions back. */
14412 if (fndecl
== void_type_node
)
14415 if (DECL_IN_AGGR_P (fndecl
))
14417 if (DECL_CLASS_SCOPE_P (fndecl
))
14418 error ("%qD is already defined in class %qT", fndecl
,
14419 DECL_CONTEXT (fndecl
));
14420 return error_mark_node
;
14423 check_template_shadow (fndecl
);
14425 DECL_COMDAT (fndecl
) = 1;
14426 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14427 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14429 /* We process method specializations in finish_struct_1. */
14430 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14432 fndecl
= push_template_decl (fndecl
);
14433 if (fndecl
== error_mark_node
)
14437 if (! DECL_FRIEND_P (fndecl
))
14439 if (DECL_CHAIN (fndecl
))
14441 fndecl
= copy_node (fndecl
);
14442 TREE_CHAIN (fndecl
) = NULL_TREE
;
14446 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14448 DECL_IN_AGGR_P (fndecl
) = 1;
14453 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14454 we can lay it out later, when and if its type becomes complete.
14456 Also handle constexpr variables where the initializer involves
14457 an unlowered PTRMEM_CST because the class isn't complete yet. */
14460 maybe_register_incomplete_var (tree var
)
14462 gcc_assert (VAR_P (var
));
14464 /* Keep track of variables with incomplete types. */
14465 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14466 && DECL_EXTERNAL (var
))
14468 tree inner_type
= TREE_TYPE (var
);
14470 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14471 inner_type
= TREE_TYPE (inner_type
);
14472 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14474 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14475 /* RTTI TD entries are created while defining the type_info. */
14476 || (TYPE_LANG_SPECIFIC (inner_type
)
14477 && TYPE_BEING_DEFINED (inner_type
)))
14479 incomplete_var iv
= {var
, inner_type
};
14480 vec_safe_push (incomplete_vars
, iv
);
14482 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14483 && decl_constant_var_p (var
)
14484 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14486 /* When the outermost open class is complete we can resolve any
14487 pointers-to-members. */
14488 tree context
= outermost_open_class ();
14489 incomplete_var iv
= {var
, context
};
14490 vec_safe_push (incomplete_vars
, iv
);
14495 /* Called when a class type (given by TYPE) is defined. If there are
14496 any existing VAR_DECLs whose type has been completed by this
14497 declaration, update them now. */
14500 complete_vars (tree type
)
14503 incomplete_var
*iv
;
14505 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14507 if (same_type_p (type
, iv
->incomplete_type
))
14509 tree var
= iv
->decl
;
14510 tree type
= TREE_TYPE (var
);
14512 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14513 == iv
->incomplete_type
)
14515 /* Complete the type of the variable. The VAR_DECL itself
14516 will be laid out in expand_expr. */
14517 complete_type (type
);
14518 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14521 if (DECL_INITIAL (var
)
14522 && decl_constant_var_p (var
))
14523 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14525 /* Remove this entry from the list. */
14526 incomplete_vars
->unordered_remove (ix
);
14532 /* Check for pending declarations which may have abstract type. */
14533 complete_type_check_abstract (type
);
14536 /* If DECL is of a type which needs a cleanup, build and return an
14537 expression to perform that cleanup here. Return NULL_TREE if no
14538 cleanup need be done. */
14541 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14547 /* Assume no cleanup is required. */
14548 cleanup
= NULL_TREE
;
14550 if (error_operand_p (decl
))
14553 /* Handle "__attribute__((cleanup))". We run the cleanup function
14554 before the destructor since the destructor is what actually
14555 terminates the lifetime of the object. */
14556 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14563 /* Get the name specified by the user for the cleanup function. */
14564 id
= TREE_VALUE (TREE_VALUE (attr
));
14565 /* Look up the name to find the cleanup function to call. It is
14566 important to use lookup_name here because that is what is
14567 used in c-common.c:handle_cleanup_attribute when performing
14568 initial checks on the attribute. Note that those checks
14569 include ensuring that the function found is not an overloaded
14570 function, or an object with an overloaded call operator,
14571 etc.; we can rely on the fact that the function found is an
14572 ordinary FUNCTION_DECL. */
14573 fn
= lookup_name (id
);
14574 arg
= build_address (decl
);
14576 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14577 if (cleanup
== error_mark_node
)
14578 return error_mark_node
;
14580 /* Handle ordinary C++ destructors. */
14581 type
= TREE_TYPE (decl
);
14582 if (type_build_dtor_call (type
))
14584 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14588 if (TREE_CODE (type
) == ARRAY_TYPE
)
14591 addr
= build_address (decl
);
14593 call
= build_delete (TREE_TYPE (addr
), addr
,
14594 sfk_complete_destructor
, flags
, 0, complain
);
14595 if (call
== error_mark_node
)
14596 cleanup
= error_mark_node
;
14597 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14598 /* Discard the call. */;
14600 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14605 /* build_delete sets the location of the destructor call to the
14606 current location, even though the destructor is going to be
14607 called later, at the end of the current scope. This can lead to
14608 a "jumpy" behaviour for users of debuggers when they step around
14609 the end of the block. So let's unset the location of the
14610 destructor call instead. */
14611 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14612 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14615 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14616 /* Treat objects with destructors as used; the destructor may do
14617 something substantive. */
14624 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14625 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14626 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14629 static_fn_type (tree memfntype
)
14634 if (TYPE_PTRMEMFUNC_P (memfntype
))
14635 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14636 if (POINTER_TYPE_P (memfntype
)
14637 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14638 memfntype
= TREE_TYPE (memfntype
);
14639 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14641 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14642 args
= TYPE_ARG_TYPES (memfntype
);
14643 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14644 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14645 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14646 fntype
= (cp_build_type_attribute_variant
14647 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14648 fntype
= (build_exception_variant
14649 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14650 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14651 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14655 /* DECL was originally constructed as a non-static member function,
14656 but turned out to be static. Update it accordingly. */
14659 revert_static_member_fn (tree decl
)
14661 tree stype
= static_fn_type (decl
);
14662 cp_cv_quals quals
= type_memfn_quals (stype
);
14663 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14665 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14666 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14668 TREE_TYPE (decl
) = stype
;
14670 if (DECL_ARGUMENTS (decl
))
14671 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14672 DECL_STATIC_FUNCTION_P (decl
) = 1;
14675 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14676 one of the language-independent trees. */
14678 enum cp_tree_node_structure_enum
14679 cp_tree_node_structure (union lang_tree_node
* t
)
14681 switch (TREE_CODE (&t
->generic
))
14683 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14684 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14685 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14686 case OVERLOAD
: return TS_CP_OVERLOAD
;
14687 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14688 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14689 case BASELINK
: return TS_CP_BASELINK
;
14690 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14691 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14692 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14693 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14694 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14695 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14696 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14697 default: return TS_CP_GENERIC
;
14701 /* Build the void_list_node (void_type_node having been created). */
14703 build_void_list_node (void)
14705 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14710 cp_missing_noreturn_ok_p (tree decl
)
14712 /* A missing noreturn is ok for the `main' function. */
14713 return DECL_MAIN_P (decl
);
14716 /* Return the decl used to identify the COMDAT group into which DECL should
14720 cxx_comdat_group (tree decl
)
14722 /* Virtual tables, construction virtual tables, and virtual table
14723 tables all go in a single COMDAT group, named after the primary
14725 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14726 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14727 /* For all other DECLs, the COMDAT group is the mangled name of the
14728 declaration itself. */
14731 while (DECL_THUNK_P (decl
))
14733 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14734 into the same section as the target function. In that case
14735 we must return target's name. */
14736 tree target
= THUNK_TARGET (decl
);
14737 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14738 && DECL_SECTION_NAME (target
) != NULL
14739 && DECL_ONE_ONLY (target
))
14749 /* Returns the return type for FN as written by the user, which may include
14750 a placeholder for a deduced return type. */
14753 fndecl_declared_return_type (tree fn
)
14755 fn
= STRIP_TEMPLATE (fn
);
14756 if (FNDECL_USED_AUTO (fn
))
14758 struct language_function
*f
= NULL
;
14759 if (DECL_STRUCT_FUNCTION (fn
))
14760 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14762 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14763 return f
->x_auto_return_pattern
;
14765 return TREE_TYPE (TREE_TYPE (fn
));
14768 /* Returns true iff DECL was declared with an auto return type and it has
14769 not yet been deduced to a real type. */
14772 undeduced_auto_decl (tree decl
)
14774 if (cxx_dialect
< cxx14
)
14776 return type_uses_auto (TREE_TYPE (decl
));
14779 /* Complain if DECL has an undeduced return type. */
14782 require_deduced_type (tree decl
)
14784 if (undeduced_auto_decl (decl
))
14785 error ("use of %qD before deduction of %<auto%>", decl
);
14788 #include "gt-cp-decl.h"