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 (DECL_SOURCE_LOCATION (newdecl
),
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 (! DECL_IS_BUILTIN (old_decl
)
1218 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1221 = "declaration of %q+F has a different exception specifier";
1222 bool complained
= true;
1223 if (! DECL_IN_SYSTEM_HEADER (old_decl
))
1224 error (msg
, new_decl
);
1226 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1228 inform (0, "from previous declaration %q+F", old_decl
);
1232 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1233 Otherwise issue diagnostics. */
1236 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1238 old_decl
= STRIP_TEMPLATE (old_decl
);
1239 new_decl
= STRIP_TEMPLATE (new_decl
);
1240 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1241 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1243 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1244 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1246 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1248 if (DECL_BUILT_IN (old_decl
))
1250 /* Hide a built-in declaration. */
1251 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1252 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1255 /* 7.1.5 [dcl.constexpr]
1256 Note: An explicit specialization can differ from the template
1257 declaration with respect to the constexpr specifier. */
1258 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1259 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1262 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1263 error ("from previous declaration %q+D", old_decl
);
1269 /* DECL is a redeclaration of a function or function template. If
1270 it does have default arguments issue a diagnostic. Note: this
1271 function is used to enforce the requirements in C++11 8.3.6 about
1272 no default arguments in redeclarations. */
1275 check_redeclaration_no_default_args (tree decl
)
1277 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1279 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1280 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1281 if (TREE_PURPOSE (t
))
1283 permerror (input_location
,
1284 "redeclaration of %q+#D may not have default "
1290 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1291 && lookup_attribute ("gnu_inline", \
1292 DECL_ATTRIBUTES (fn)))
1294 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1295 If the redeclaration is invalid, a diagnostic is issued, and the
1296 error_mark_node is returned. Otherwise, OLDDECL is returned.
1298 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1301 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1304 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1306 unsigned olddecl_uid
= DECL_UID (olddecl
);
1307 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1308 int new_defines_function
= 0;
1309 tree new_template_info
;
1311 if (newdecl
== olddecl
)
1314 types_match
= decls_match (newdecl
, olddecl
);
1316 /* If either the type of the new decl or the type of the old decl is an
1317 error_mark_node, then that implies that we have already issued an
1318 error (earlier) for some bogus type specification, and in that case,
1319 it is rather pointless to harass the user with yet more error message
1320 about the same declaration, so just pretend the types match here. */
1321 if (TREE_TYPE (newdecl
) == error_mark_node
1322 || TREE_TYPE (olddecl
) == error_mark_node
)
1323 return error_mark_node
;
1325 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1326 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1328 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1329 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1330 && check_raw_literal_operator (olddecl
))
1331 error ("literal operator template %q+D conflicts with"
1332 " raw literal operator %qD", newdecl
, olddecl
);
1333 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1334 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1335 && check_raw_literal_operator (newdecl
))
1336 error ("raw literal operator %q+D conflicts with"
1337 " literal operator template %qD", newdecl
, olddecl
);
1340 if (DECL_P (olddecl
)
1341 && TREE_CODE (newdecl
) == FUNCTION_DECL
1342 && TREE_CODE (olddecl
) == FUNCTION_DECL
1343 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1345 if (DECL_DECLARED_INLINE_P (newdecl
)
1346 && DECL_UNINLINABLE (newdecl
)
1347 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1348 /* Already warned elsewhere. */;
1349 else if (DECL_DECLARED_INLINE_P (olddecl
)
1350 && DECL_UNINLINABLE (olddecl
)
1351 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1352 /* Already warned. */;
1353 else if (DECL_DECLARED_INLINE_P (newdecl
)
1354 && DECL_UNINLINABLE (olddecl
)
1355 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1357 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1359 inform (DECL_SOURCE_LOCATION (olddecl
),
1360 "previous declaration of %qD with attribute noinline",
1363 else if (DECL_DECLARED_INLINE_P (olddecl
)
1364 && DECL_UNINLINABLE (newdecl
)
1365 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1367 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1368 "attribute noinline", newdecl
))
1369 inform (DECL_SOURCE_LOCATION (olddecl
),
1370 "previous declaration of %qD was inline",
1375 /* Check for redeclaration and other discrepancies. */
1376 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1377 && DECL_ARTIFICIAL (olddecl
))
1379 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1380 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1382 /* Avoid warnings redeclaring built-ins which have not been
1383 explicitly declared. */
1384 if (DECL_ANTICIPATED (olddecl
))
1387 /* If you declare a built-in or predefined function name as static,
1388 the old definition is overridden, but optionally warn this was a
1389 bad choice of name. */
1390 if (! TREE_PUBLIC (newdecl
))
1392 warning (OPT_Wshadow
,
1393 DECL_BUILT_IN (olddecl
)
1394 ? G_("shadowing built-in function %q#D")
1395 : G_("shadowing library function %q#D"), olddecl
);
1396 /* Discard the old built-in function. */
1399 /* If the built-in is not ansi, then programs can override
1400 it even globally without an error. */
1401 else if (! DECL_BUILT_IN (olddecl
))
1402 warning (0, "library function %q#D redeclared as non-function %q+#D",
1405 error ("declaration of %q+#D conflicts with built-in "
1406 "declaration %q#D", newdecl
, olddecl
);
1409 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1411 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1412 error_at (DECL_SOURCE_LOCATION (newdecl
),
1413 "redeclaration of %<pragma omp declare reduction%>");
1414 inform (DECL_SOURCE_LOCATION (olddecl
),
1415 "previous %<pragma omp declare reduction%> declaration");
1416 return error_mark_node
;
1418 else if (!types_match
)
1420 /* Avoid warnings redeclaring built-ins which have not been
1421 explicitly declared. */
1422 if (DECL_ANTICIPATED (olddecl
))
1424 /* Deal with fileptr_type_node. FILE type is not known
1425 at the time we create the builtins. */
1428 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1429 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1431 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1434 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1436 tree t
= TREE_VALUE (t1
);
1439 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1440 == get_identifier ("FILE")
1441 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1443 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1445 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1446 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1447 types_match
= decls_match (newdecl
, olddecl
);
1449 return duplicate_decls (newdecl
, olddecl
,
1451 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1454 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1457 else if ((DECL_EXTERN_C_P (newdecl
)
1458 && DECL_EXTERN_C_P (olddecl
))
1459 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1460 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1462 /* A near match; override the builtin. */
1464 if (TREE_PUBLIC (newdecl
))
1465 warning (0, "new declaration %q+#D ambiguates built-in "
1466 "declaration %q#D", newdecl
, olddecl
);
1468 warning (OPT_Wshadow
,
1469 DECL_BUILT_IN (olddecl
)
1470 ? G_("shadowing built-in function %q#D")
1471 : G_("shadowing library function %q#D"), olddecl
);
1474 /* Discard the old built-in function. */
1477 /* Replace the old RTL to avoid problems with inlining. */
1478 COPY_DECL_RTL (newdecl
, olddecl
);
1480 /* Even if the types match, prefer the new declarations type for
1481 built-ins which have not been explicitly declared, for
1482 exception lists, etc... */
1483 else if (DECL_IS_BUILTIN (olddecl
))
1485 tree type
= TREE_TYPE (newdecl
);
1486 tree attribs
= (*targetm
.merge_type_attributes
)
1487 (TREE_TYPE (olddecl
), type
);
1489 type
= cp_build_type_attribute_variant (type
, attribs
);
1490 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1493 /* If a function is explicitly declared "throw ()", propagate that to
1494 the corresponding builtin. */
1495 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1496 && DECL_ANTICIPATED (olddecl
)
1497 && TREE_NOTHROW (newdecl
)
1498 && !TREE_NOTHROW (olddecl
))
1500 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1501 tree tmpdecl
= builtin_decl_explicit (fncode
);
1502 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1503 TREE_NOTHROW (tmpdecl
) = 1;
1506 /* Whether or not the builtin can throw exceptions has no
1507 bearing on this declarator. */
1508 TREE_NOTHROW (olddecl
) = 0;
1510 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1512 /* If a builtin function is redeclared as `static', merge
1513 the declarations, but make the original one static. */
1514 DECL_THIS_STATIC (olddecl
) = 1;
1515 TREE_PUBLIC (olddecl
) = 0;
1517 /* Make the old declaration consistent with the new one so
1518 that all remnants of the builtin-ness of this function
1519 will be banished. */
1520 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1521 COPY_DECL_RTL (newdecl
, olddecl
);
1524 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1526 /* C++ Standard, 3.3, clause 4:
1527 "[Note: a namespace name or a class template name must be unique
1528 in its declarative region (7.3.2, clause 14). ]" */
1529 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1530 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1531 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1532 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1533 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1534 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1536 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1537 && TREE_CODE (newdecl
) != TYPE_DECL
)
1538 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1539 && TREE_CODE (olddecl
) != TYPE_DECL
))
1541 /* We do nothing special here, because C++ does such nasty
1542 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1543 get shadowed, and know that if we need to find a TYPE_DECL
1544 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1545 slot of the identifier. */
1549 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1550 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1551 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1552 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1556 error ("%q#D redeclared as different kind of symbol", newdecl
);
1557 if (TREE_CODE (olddecl
) == TREE_LIST
)
1558 olddecl
= TREE_VALUE (olddecl
);
1559 inform (DECL_SOURCE_LOCATION (olddecl
),
1560 "previous declaration %q#D", olddecl
);
1562 return error_mark_node
;
1564 else if (!types_match
)
1566 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1567 /* These are certainly not duplicate declarations; they're
1568 from different scopes. */
1571 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1573 /* The name of a class template may not be declared to refer to
1574 any other template, class, function, object, namespace, value,
1575 or type in the same scope. */
1576 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1577 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1579 error ("conflicting declaration of template %q+#D", newdecl
);
1580 inform (DECL_SOURCE_LOCATION (olddecl
),
1581 "previous declaration %q#D", olddecl
);
1582 return error_mark_node
;
1584 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1585 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1586 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1587 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1588 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1589 DECL_TEMPLATE_PARMS (olddecl
))
1590 /* Template functions can be disambiguated by
1592 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1593 TREE_TYPE (TREE_TYPE (olddecl
))))
1595 error ("ambiguating new declaration %q+#D", newdecl
);
1596 inform (DECL_SOURCE_LOCATION (olddecl
),
1597 "old declaration %q#D", olddecl
);
1601 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1603 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1605 error ("conflicting declaration of C function %q+#D",
1607 inform (DECL_SOURCE_LOCATION (olddecl
),
1608 "previous declaration %q#D", olddecl
);
1611 /* For function versions, params and types match, but they
1612 are not ambiguous. */
1613 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1614 && !DECL_FUNCTION_VERSIONED (olddecl
))
1615 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1616 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1618 error ("ambiguating new declaration of %q+#D", newdecl
);
1619 inform (DECL_SOURCE_LOCATION (olddecl
),
1620 "old declaration %q#D", olddecl
);
1621 return error_mark_node
;
1628 error ("conflicting declaration %q+#D", newdecl
);
1629 inform (DECL_SOURCE_LOCATION (olddecl
),
1630 "previous declaration as %q#D", olddecl
);
1631 return error_mark_node
;
1634 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1635 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1636 && (!DECL_TEMPLATE_INFO (newdecl
)
1637 || (DECL_TI_TEMPLATE (newdecl
)
1638 != DECL_TI_TEMPLATE (olddecl
))))
1639 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1640 && (!DECL_TEMPLATE_INFO (olddecl
)
1641 || (DECL_TI_TEMPLATE (olddecl
)
1642 != DECL_TI_TEMPLATE (newdecl
))))))
1643 /* It's OK to have a template specialization and a non-template
1644 with the same type, or to have specializations of two
1645 different templates with the same type. Note that if one is a
1646 specialization, and the other is an instantiation of the same
1647 template, that we do not exit at this point. That situation
1648 can occur if we instantiate a template class, and then
1649 specialize one of its methods. This situation is valid, but
1650 the declarations must be merged in the usual way. */
1652 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1653 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1654 && !DECL_USE_TEMPLATE (newdecl
))
1655 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1656 && !DECL_USE_TEMPLATE (olddecl
))))
1657 /* One of the declarations is a template instantiation, and the
1658 other is not a template at all. That's OK. */
1660 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1662 /* In [namespace.alias] we have:
1664 In a declarative region, a namespace-alias-definition can be
1665 used to redefine a namespace-alias declared in that declarative
1666 region to refer only to the namespace to which it already
1669 Therefore, if we encounter a second alias directive for the same
1670 alias, we can just ignore the second directive. */
1671 if (DECL_NAMESPACE_ALIAS (newdecl
)
1672 && (DECL_NAMESPACE_ALIAS (newdecl
)
1673 == DECL_NAMESPACE_ALIAS (olddecl
)))
1675 /* [namespace.alias]
1677 A namespace-name or namespace-alias shall not be declared as
1678 the name of any other entity in the same declarative region.
1679 A namespace-name defined at global scope shall not be
1680 declared as the name of any other entity in any global scope
1682 error ("conflicting declaration of namespace %q+D", newdecl
);
1683 inform (DECL_SOURCE_LOCATION (olddecl
),
1684 "previous declaration of namespace %qD here", olddecl
);
1685 return error_mark_node
;
1689 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1692 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1693 if (DECL_NAME (olddecl
) != NULL_TREE
)
1694 inform (input_location
,
1695 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1696 ? G_("%q+#D previously defined here")
1697 : G_("%q+#D previously declared here"), olddecl
);
1698 return error_mark_node
;
1700 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1701 && DECL_INITIAL (olddecl
) != NULL_TREE
1702 && !prototype_p (TREE_TYPE (olddecl
))
1703 && prototype_p (TREE_TYPE (newdecl
)))
1705 /* Prototype decl follows defn w/o prototype. */
1706 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1707 "prototype specified for %q+#D", newdecl
))
1708 inform (DECL_SOURCE_LOCATION (olddecl
),
1709 "previous non-prototype definition here");
1711 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1712 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1715 If two declarations of the same function or object
1716 specify different linkage-specifications ..., the program
1717 is ill-formed.... Except for functions with C++ linkage,
1718 a function declaration without a linkage specification
1719 shall not precede the first linkage specification for
1720 that function. A function can be declared without a
1721 linkage specification after an explicit linkage
1722 specification has been seen; the linkage explicitly
1723 specified in the earlier declaration is not affected by
1724 such a function declaration.
1726 DR 563 raises the question why the restrictions on
1727 functions should not also apply to objects. Older
1728 versions of G++ silently ignore the linkage-specification
1736 which is clearly wrong. Therefore, we now treat objects
1738 if (current_lang_depth () == 0)
1740 /* There is no explicit linkage-specification, so we use
1741 the linkage from the previous declaration. */
1742 if (!DECL_LANG_SPECIFIC (newdecl
))
1743 retrofit_lang_decl (newdecl
);
1744 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1748 error ("conflicting declaration of %q+#D with %qL linkage",
1749 newdecl
, DECL_LANGUAGE (newdecl
));
1750 inform (DECL_SOURCE_LOCATION (olddecl
),
1751 "previous declaration with %qL linkage",
1752 DECL_LANGUAGE (olddecl
));
1756 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1758 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1760 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1761 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1762 && (/* grokfndecl passes member function templates too
1763 as FUNCTION_DECLs. */
1764 DECL_TEMPLATE_INFO (olddecl
)
1766 Default arguments for a member function of a class
1767 template shall be specified on the initial declaration
1768 of the member function within the class template. */
1769 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1770 check_redeclaration_no_default_args (newdecl
);
1773 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1774 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1777 for (; t1
&& t1
!= void_list_node
;
1778 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1779 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1781 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1784 if (permerror (input_location
,
1785 "default argument given for parameter "
1786 "%d of %q#D", i
, newdecl
))
1787 inform (DECL_SOURCE_LOCATION (olddecl
),
1788 "previous specification in %q#D here",
1793 error ("default argument given for parameter %d "
1794 "of %q#D", i
, newdecl
);
1795 inform (DECL_SOURCE_LOCATION (olddecl
),
1796 "previous specification in %q#D here",
1804 /* Do not merge an implicit typedef with an explicit one. In:
1808 typedef class A A __attribute__ ((foo));
1810 the attribute should apply only to the typedef. */
1811 if (TREE_CODE (olddecl
) == TYPE_DECL
1812 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1813 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1816 /* If new decl is `static' and an `extern' was seen previously,
1818 warn_extern_redeclared_static (newdecl
, olddecl
);
1820 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1821 return error_mark_node
;
1823 /* We have committed to returning 1 at this point. */
1824 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1826 /* Now that functions must hold information normally held
1827 by field decls, there is extra work to do so that
1828 declaration information does not get destroyed during
1830 if (DECL_VINDEX (olddecl
))
1831 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1832 if (DECL_CONTEXT (olddecl
))
1833 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1834 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1835 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1836 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1837 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1838 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1839 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1840 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1841 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1842 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1843 SET_OVERLOADED_OPERATOR_CODE
1844 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1845 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1847 /* Optionally warn about more than one declaration for the same
1848 name, but don't warn about a function declaration followed by a
1850 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1851 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1852 /* Don't warn about extern decl followed by definition. */
1853 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1854 /* Don't warn about friends, let add_friend take care of it. */
1855 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1856 /* Don't warn about declaration followed by specialization. */
1857 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1858 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1860 if (warning (OPT_Wredundant_decls
,
1861 "redundant redeclaration of %q+D in same scope",
1863 inform (DECL_SOURCE_LOCATION (olddecl
),
1864 "previous declaration of %qD", olddecl
);
1867 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1868 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1870 if (DECL_DELETED_FN (newdecl
))
1872 error ("deleted definition of %q+D", newdecl
);
1873 inform (DECL_SOURCE_LOCATION (olddecl
),
1874 "previous declaration of %qD", olddecl
);
1876 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1880 /* Deal with C++: must preserve virtual function table size. */
1881 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1883 tree newtype
= TREE_TYPE (newdecl
);
1884 tree oldtype
= TREE_TYPE (olddecl
);
1886 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1887 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1888 CLASSTYPE_FRIEND_CLASSES (newtype
)
1889 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1891 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1894 /* Copy all the DECL_... slots specified in the new decl
1895 except for any that we copy here from the old type. */
1896 DECL_ATTRIBUTES (newdecl
)
1897 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1899 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1901 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1902 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1903 && DECL_HIDDEN_FRIEND_P (olddecl
)
1904 && newdecl_is_friend
);
1907 DECL_ANTICIPATED (olddecl
) = 0;
1908 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1912 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1916 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1917 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1918 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1919 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1920 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1921 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1923 DECL_ATTRIBUTES (old_result
)
1924 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1926 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1928 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1929 declarations of a function template. */
1930 if (DECL_SOURCE_LOCATION (newdecl
)
1931 != DECL_SOURCE_LOCATION (olddecl
))
1932 check_redeclaration_no_default_args (newdecl
);
1934 check_default_args (newdecl
);
1936 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1937 && DECL_INITIAL (new_result
))
1939 if (DECL_INITIAL (old_result
))
1940 DECL_UNINLINABLE (old_result
) = 1;
1942 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1943 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1944 DECL_NOT_REALLY_EXTERN (old_result
)
1945 = DECL_NOT_REALLY_EXTERN (new_result
);
1946 DECL_INTERFACE_KNOWN (old_result
)
1947 = DECL_INTERFACE_KNOWN (new_result
);
1948 DECL_DECLARED_INLINE_P (old_result
)
1949 = DECL_DECLARED_INLINE_P (new_result
);
1950 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1951 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1956 DECL_DECLARED_INLINE_P (old_result
)
1957 |= DECL_DECLARED_INLINE_P (new_result
);
1958 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1959 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1960 check_redeclaration_exception_specification (newdecl
, olddecl
);
1964 /* If the new declaration is a definition, update the file and
1965 line information on the declaration, and also make
1966 the old declaration the same definition. */
1967 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1969 DECL_SOURCE_LOCATION (olddecl
)
1970 = DECL_SOURCE_LOCATION (old_result
)
1971 = DECL_SOURCE_LOCATION (newdecl
);
1972 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1973 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1976 DECL_ARGUMENTS (old_result
)
1977 = DECL_ARGUMENTS (new_result
);
1978 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1979 parm
= DECL_CHAIN (parm
))
1980 DECL_CONTEXT (parm
) = old_result
;
1989 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1990 check_redeclaration_exception_specification (newdecl
, olddecl
);
1992 /* Automatically handles default parameters. */
1993 tree oldtype
= TREE_TYPE (olddecl
);
1996 /* For typedefs use the old type, as the new type's DECL_NAME points
1997 at newdecl, which will be ggc_freed. */
1998 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2001 /* Merge the data types specified in the two decls. */
2002 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
2004 if (VAR_P (newdecl
))
2006 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
2007 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
2008 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
2009 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
2010 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
2011 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
2013 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2014 if (DECL_LANG_SPECIFIC (olddecl
)
2015 && CP_DECL_THREADPRIVATE_P (olddecl
))
2017 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2018 if (!DECL_LANG_SPECIFIC (newdecl
))
2019 retrofit_lang_decl (newdecl
);
2021 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2025 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2027 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2028 check_default_args (newdecl
);
2030 /* Lay the type out, unless already done. */
2031 if (! same_type_p (newtype
, oldtype
)
2032 && TREE_TYPE (newdecl
) != error_mark_node
2033 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2034 layout_type (TREE_TYPE (newdecl
));
2036 if ((VAR_P (newdecl
)
2037 || TREE_CODE (newdecl
) == PARM_DECL
2038 || TREE_CODE (newdecl
) == RESULT_DECL
2039 || TREE_CODE (newdecl
) == FIELD_DECL
2040 || TREE_CODE (newdecl
) == TYPE_DECL
)
2041 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2042 layout_decl (newdecl
, 0);
2044 /* Merge the type qualifiers. */
2045 if (TREE_READONLY (newdecl
))
2046 TREE_READONLY (olddecl
) = 1;
2047 if (TREE_THIS_VOLATILE (newdecl
))
2048 TREE_THIS_VOLATILE (olddecl
) = 1;
2049 if (TREE_NOTHROW (newdecl
))
2050 TREE_NOTHROW (olddecl
) = 1;
2052 /* Merge deprecatedness. */
2053 if (TREE_DEPRECATED (newdecl
))
2054 TREE_DEPRECATED (olddecl
) = 1;
2056 /* Preserve function specific target and optimization options */
2057 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2059 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2060 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2061 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2062 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2064 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2065 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2066 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2067 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2070 /* Merge the initialization information. */
2071 if (DECL_INITIAL (newdecl
) == NULL_TREE
2072 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2074 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2075 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2076 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2078 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2079 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2083 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2085 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2086 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2087 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2088 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2089 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2090 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2091 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2092 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2093 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2094 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2095 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2096 /* Keep the old RTL. */
2097 COPY_DECL_RTL (olddecl
, newdecl
);
2099 else if (VAR_P (newdecl
)
2100 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2102 /* Keep the old RTL. We cannot keep the old RTL if the old
2103 declaration was for an incomplete object and the new
2104 declaration is not since many attributes of the RTL will
2106 COPY_DECL_RTL (olddecl
, newdecl
);
2109 /* If cannot merge, then use the new type and qualifiers,
2110 and don't preserve the old rtl. */
2113 /* Clean out any memory we had of the old declaration. */
2114 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2116 TREE_VALUE (oldstatic
) = error_mark_node
;
2118 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2119 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2120 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2121 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2124 /* Merge the storage class information. */
2125 merge_weak (newdecl
, olddecl
);
2127 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2128 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2129 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2130 if (! DECL_EXTERNAL (olddecl
))
2131 DECL_EXTERNAL (newdecl
) = 0;
2133 new_template_info
= NULL_TREE
;
2134 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2136 bool new_redefines_gnu_inline
= false;
2138 if (new_defines_function
2139 && ((DECL_INTERFACE_KNOWN (olddecl
)
2140 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2141 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2142 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2143 == FUNCTION_DECL
))))
2147 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2148 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2150 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2153 if (!new_redefines_gnu_inline
)
2155 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2156 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2157 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2159 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2160 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2161 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2163 /* If the OLDDECL is an instantiation and/or specialization,
2164 then the NEWDECL must be too. But, it may not yet be marked
2165 as such if the caller has created NEWDECL, but has not yet
2166 figured out that it is a redeclaration. */
2167 if (!DECL_USE_TEMPLATE (newdecl
))
2168 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2170 /* Don't really know how much of the language-specific
2171 values we should copy from old to new. */
2172 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2173 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2174 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2175 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2177 if (LANG_DECL_HAS_MIN (newdecl
))
2179 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2180 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2181 if (DECL_TEMPLATE_INFO (newdecl
))
2183 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2184 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2185 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2186 /* Remember the presence of explicit specialization args. */
2187 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2188 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2190 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2192 /* Only functions have these fields. */
2193 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2195 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2196 DECL_BEFRIENDING_CLASSES (newdecl
)
2197 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2198 DECL_BEFRIENDING_CLASSES (olddecl
));
2199 /* DECL_THUNKS is only valid for virtual functions,
2200 otherwise it is a DECL_FRIEND_CONTEXT. */
2201 if (DECL_VIRTUAL_P (newdecl
))
2202 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2204 /* Only variables have this field. */
2205 else if (VAR_P (newdecl
)
2206 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2207 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2210 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2214 /* Merge parameter attributes. */
2215 tree oldarg
, newarg
;
2216 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2217 newarg
= DECL_ARGUMENTS(newdecl
);
2219 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2220 DECL_ATTRIBUTES (newarg
)
2221 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2222 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2225 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2226 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2228 /* If newdecl is not a specialization, then it is not a
2229 template-related function at all. And that means that we
2230 should have exited above, returning 0. */
2231 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2233 if (DECL_ODR_USED (olddecl
))
2234 /* From [temp.expl.spec]:
2236 If a template, a member template or the member of a class
2237 template is explicitly specialized then that
2238 specialization shall be declared before the first use of
2239 that specialization that would cause an implicit
2240 instantiation to take place, in every translation unit in
2241 which such a use occurs. */
2242 error ("explicit specialization of %qD after first use",
2245 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2246 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2247 && DECL_DECLARED_INLINE_P (newdecl
));
2249 /* Don't propagate visibility from the template to the
2250 specialization here. We'll do that in determine_visibility if
2252 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2254 /* [temp.expl.spec/14] We don't inline explicit specialization
2255 just because the primary template says so. */
2257 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2258 the always_inline attribute. */
2259 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2260 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2262 if (DECL_DECLARED_INLINE_P (newdecl
))
2263 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2265 DECL_ATTRIBUTES (newdecl
)
2266 = remove_attribute ("always_inline",
2267 DECL_ATTRIBUTES (newdecl
));
2270 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2272 /* Never inline re-defined extern inline functions.
2273 FIXME: this could be better handled by keeping both
2274 function as separate declarations. */
2275 DECL_UNINLINABLE (newdecl
) = 1;
2279 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2280 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2282 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2284 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2285 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2287 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2288 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2289 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2290 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2293 /* Preserve abstractness on cloned [cd]tors. */
2294 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2296 /* Update newdecl's parms to point at olddecl. */
2297 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2298 parm
= DECL_CHAIN (parm
))
2299 DECL_CONTEXT (parm
) = olddecl
;
2303 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2304 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2305 COPY_DECL_RTL (newdecl
, olddecl
);
2307 if (! types_match
|| new_defines_function
)
2309 /* These need to be copied so that the names are available.
2310 Note that if the types do match, we'll preserve inline
2311 info and other bits, but if not, we won't. */
2312 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2313 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2315 /* If redeclaring a builtin function, it stays built in
2316 if newdecl is a gnu_inline definition, or if newdecl is just
2318 if (DECL_BUILT_IN (olddecl
)
2319 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2321 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2322 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2323 /* If we're keeping the built-in definition, keep the rtl,
2324 regardless of declaration matches. */
2325 COPY_DECL_RTL (olddecl
, newdecl
);
2326 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2328 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2331 /* If a compatible prototype of these builtin functions
2332 is seen, assume the runtime implements it with the
2333 expected semantics. */
2334 case BUILT_IN_STPCPY
:
2335 if (builtin_decl_explicit_p (fncode
))
2336 set_builtin_decl_implicit_p (fncode
, true);
2339 if (builtin_decl_explicit_p (fncode
))
2340 set_builtin_decl_declared_p (fncode
, true);
2345 if (new_defines_function
)
2346 /* If defining a function declared with other language
2347 linkage, use the previously declared language linkage. */
2348 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2349 else if (types_match
)
2351 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2352 /* Don't clear out the arguments if we're just redeclaring a
2354 if (DECL_ARGUMENTS (olddecl
))
2355 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2358 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2359 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2361 /* Now preserve various other info from the definition. */
2362 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2363 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2364 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2365 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2367 /* Warn about conflicting visibility specifications. */
2368 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2369 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2370 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2372 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2373 "%qD: visibility attribute ignored because it "
2374 "conflicts with previous declaration", newdecl
))
2375 inform (DECL_SOURCE_LOCATION (olddecl
),
2376 "previous declaration of %qD", olddecl
);
2378 /* Choose the declaration which specified visibility. */
2379 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2381 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2382 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2384 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2385 so keep this behavior. */
2386 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2388 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2389 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2391 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2392 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2394 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2395 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2397 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2398 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2399 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2401 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2402 with that from NEWDECL below. */
2403 if (DECL_LANG_SPECIFIC (olddecl
))
2405 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2406 != DECL_LANG_SPECIFIC (newdecl
));
2407 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2410 /* Merge the USED information. */
2411 if (TREE_USED (olddecl
))
2412 TREE_USED (newdecl
) = 1;
2413 else if (TREE_USED (newdecl
))
2414 TREE_USED (olddecl
) = 1;
2415 if (VAR_P (newdecl
))
2417 if (DECL_READ_P (olddecl
))
2418 DECL_READ_P (newdecl
) = 1;
2419 else if (DECL_READ_P (newdecl
))
2420 DECL_READ_P (olddecl
) = 1;
2422 if (DECL_PRESERVE_P (olddecl
))
2423 DECL_PRESERVE_P (newdecl
) = 1;
2424 else if (DECL_PRESERVE_P (newdecl
))
2425 DECL_PRESERVE_P (olddecl
) = 1;
2427 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2428 to olddecl and deleted. */
2429 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2430 && DECL_FUNCTION_VERSIONED (olddecl
))
2432 /* Set the flag for newdecl so that it gets copied to olddecl. */
2433 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2434 /* newdecl will be purged after copying to olddecl and is no longer
2436 cgraph_node::delete_function_version (newdecl
);
2439 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2442 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2444 function_size
= sizeof (struct tree_decl_common
);
2446 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2447 (char *) newdecl
+ sizeof (struct tree_common
),
2448 function_size
- sizeof (struct tree_common
));
2450 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2451 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2452 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2454 /* Preserve symtab node mapping. */
2455 olddecl
->decl_with_vis
.symtab_node
= snode
;
2457 if (new_template_info
)
2458 /* If newdecl is a template instantiation, it is possible that
2459 the following sequence of events has occurred:
2461 o A friend function was declared in a class template. The
2462 class template was instantiated.
2464 o The instantiation of the friend declaration was
2465 recorded on the instantiation list, and is newdecl.
2467 o Later, however, instantiate_class_template called pushdecl
2468 on the newdecl to perform name injection. But, pushdecl in
2469 turn called duplicate_decls when it discovered that another
2470 declaration of a global function with the same name already
2473 o Here, in duplicate_decls, we decided to clobber newdecl.
2475 If we're going to do that, we'd better make sure that
2476 olddecl, and not newdecl, is on the list of
2477 instantiations so that if we try to do the instantiation
2478 again we won't get the clobbered declaration. */
2479 reregister_specialization (newdecl
,
2485 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2487 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2488 (char *) newdecl
+ sizeof (struct tree_common
),
2489 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2490 switch (TREE_CODE (newdecl
))
2500 struct symtab_node
*snode
= NULL
;
2502 if (TREE_CODE (newdecl
) == VAR_DECL
2503 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2504 snode
= symtab_node::get (olddecl
);
2505 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2506 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2507 size
- sizeof (struct tree_decl_common
)
2508 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2509 if (TREE_CODE (newdecl
) == VAR_DECL
)
2510 olddecl
->decl_with_vis
.symtab_node
= snode
;
2514 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2515 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2516 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2517 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2522 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2523 || TREE_CODE (newdecl
) == VAR_DECL
)
2525 if (DECL_EXTERNAL (olddecl
)
2526 || TREE_PUBLIC (olddecl
)
2527 || TREE_STATIC (olddecl
))
2529 /* Merge the section attribute.
2530 We want to issue an error if the sections conflict but that must be
2531 done later in decl_attributes since we are called before attributes
2533 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2534 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2536 if (DECL_ONE_ONLY (newdecl
))
2538 struct symtab_node
*oldsym
, *newsym
;
2539 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2540 oldsym
= cgraph_node::get_create (olddecl
);
2542 oldsym
= varpool_node::get_create (olddecl
);
2543 newsym
= symtab_node::get (newdecl
);
2544 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2548 if (TREE_CODE (newdecl
) == VAR_DECL
2549 && DECL_THREAD_LOCAL_P (newdecl
))
2550 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2553 DECL_UID (olddecl
) = olddecl_uid
;
2555 DECL_FRIEND_P (olddecl
) = 1;
2558 DECL_ANTICIPATED (olddecl
) = 1;
2559 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2562 /* NEWDECL contains the merged attribute lists.
2563 Update OLDDECL to be the same. */
2564 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2566 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2567 so that encode_section_info has a chance to look at the new decl
2568 flags and attributes. */
2569 if (DECL_RTL_SET_P (olddecl
)
2570 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2572 && TREE_STATIC (olddecl
))))
2573 make_decl_rtl (olddecl
);
2575 /* The NEWDECL will no longer be needed. Because every out-of-class
2576 declaration of a member results in a call to duplicate_decls,
2577 freeing these nodes represents in a significant savings.
2579 Before releasing the node, be sore to remove function from symbol
2580 table that might have been inserted there to record comdat group.
2581 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2582 structure is shared in between newdecl and oldecl. */
2583 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2584 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2585 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2586 || TREE_CODE (newdecl
) == VAR_DECL
)
2588 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2597 /* Return zero if the declaration NEWDECL is valid
2598 when the declaration OLDDECL (assumed to be for the same name)
2599 has already been seen.
2600 Otherwise return an error message format string with a %s
2601 where the identifier should go. */
2604 redeclaration_error_message (tree newdecl
, tree olddecl
)
2606 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2608 /* Because C++ can put things into name space for free,
2609 constructs like "typedef struct foo { ... } foo"
2610 would look like an erroneous redeclaration. */
2611 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2614 return G_("redefinition of %q#D");
2616 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2618 /* If this is a pure function, its olddecl will actually be
2619 the original initialization to `0' (which we force to call
2620 abort()). Don't complain about redefinition in this case. */
2621 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2622 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2625 /* If both functions come from different namespaces, this is not
2626 a redeclaration - this is a conflict with a used function. */
2627 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2628 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2629 && ! decls_match (olddecl
, newdecl
))
2630 return G_("%qD conflicts with used function");
2632 /* We'll complain about linkage mismatches in
2633 warn_extern_redeclared_static. */
2635 /* Defining the same name twice is no good. */
2636 if (DECL_INITIAL (olddecl
) != NULL_TREE
2637 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2639 if (DECL_NAME (olddecl
) == NULL_TREE
)
2640 return G_("%q#D not declared in class");
2641 else if (!GNU_INLINE_P (olddecl
)
2642 || GNU_INLINE_P (newdecl
))
2643 return G_("redefinition of %q#D");
2646 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2648 bool olda
= GNU_INLINE_P (olddecl
);
2649 bool newa
= GNU_INLINE_P (newdecl
);
2654 return G_("%q+D redeclared inline with "
2655 "%<gnu_inline%> attribute");
2657 return G_("%q+D redeclared inline without "
2658 "%<gnu_inline%> attribute");
2662 check_abi_tag_redeclaration
2663 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2664 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2668 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2672 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2674 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2675 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2676 return G_("redefinition of %q#D");
2680 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2681 || (DECL_TEMPLATE_RESULT (newdecl
)
2682 == DECL_TEMPLATE_RESULT (olddecl
)))
2685 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2686 if (DECL_TEMPLATE_INFO (nt
))
2687 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2688 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2689 if (DECL_TEMPLATE_INFO (ot
))
2690 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2691 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2692 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2693 return G_("redefinition of %q#D");
2695 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2697 bool olda
= GNU_INLINE_P (ot
);
2698 bool newa
= GNU_INLINE_P (nt
);
2703 return G_("%q+D redeclared inline with "
2704 "%<gnu_inline%> attribute");
2706 return G_("%q+D redeclared inline without "
2707 "%<gnu_inline%> attribute");
2711 /* Core issue #226 (C++0x):
2713 If a friend function template declaration specifies a
2714 default template-argument, that declaration shall be a
2715 definition and shall be the only declaration of the
2716 function template in the translation unit. */
2717 if ((cxx_dialect
!= cxx98
)
2718 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2719 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2720 /*is_primary=*/true,
2721 /*is_partial=*/false,
2722 /*is_friend_decl=*/2))
2723 return G_("redeclaration of friend %q#D "
2724 "may not have default template arguments");
2728 else if (VAR_P (newdecl
)
2729 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2730 && (! DECL_LANG_SPECIFIC (olddecl
)
2731 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2732 || DECL_THREAD_LOCAL_P (newdecl
)))
2734 /* Only variables can be thread-local, and all declarations must
2735 agree on this property. */
2736 if (DECL_THREAD_LOCAL_P (newdecl
))
2737 return G_("thread-local declaration of %q#D follows "
2738 "non-thread-local declaration");
2740 return G_("non-thread-local declaration of %q#D follows "
2741 "thread-local declaration");
2743 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2745 /* The objects have been declared at namespace scope. If either
2746 is a member of an anonymous union, then this is an invalid
2747 redeclaration. For example:
2753 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2754 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2755 return G_("redeclaration of %q#D");
2756 /* If at least one declaration is a reference, there is no
2757 conflict. For example:
2763 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2765 /* Reject two definitions. */
2766 return G_("redefinition of %q#D");
2770 /* Objects declared with block scope: */
2771 /* Reject two definitions, and reject a definition
2772 together with an external reference. */
2773 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2774 return G_("redeclaration of %q#D");
2779 /* Hash and equality functions for the named_label table. */
2782 named_label_hasher::hash (named_label_entry
*ent
)
2784 return DECL_UID (ent
->label_decl
);
2788 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2790 return a
->label_decl
== b
->label_decl
;
2793 /* Create a new label, named ID. */
2796 make_label_decl (tree id
, int local_p
)
2798 struct named_label_entry
*ent
;
2801 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2803 DECL_CONTEXT (decl
) = current_function_decl
;
2804 DECL_MODE (decl
) = VOIDmode
;
2805 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2807 /* Say where one reference is to the label, for the sake of the
2808 error if it is not defined. */
2809 DECL_SOURCE_LOCATION (decl
) = input_location
;
2811 /* Record the fact that this identifier is bound to this label. */
2812 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2814 /* Create the label htab for the function on demand. */
2816 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2818 /* Record this label on the list of labels used in this function.
2819 We do this before calling make_label_decl so that we get the
2820 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2821 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2822 ent
->label_decl
= decl
;
2824 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2825 gcc_assert (*slot
== NULL
);
2831 /* Look for a label named ID in the current function. If one cannot
2832 be found, create one. (We keep track of used, but undefined,
2833 labels, and complain about them at the end of a function.) */
2836 lookup_label_1 (tree id
)
2840 /* You can't use labels at global scope. */
2841 if (current_function_decl
== NULL_TREE
)
2843 error ("label %qE referenced outside of any function", id
);
2847 /* See if we've already got this label. */
2848 decl
= IDENTIFIER_LABEL_VALUE (id
);
2849 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2852 decl
= make_label_decl (id
, /*local_p=*/0);
2856 /* Wrapper for lookup_label_1. */
2859 lookup_label (tree id
)
2862 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2863 ret
= lookup_label_1 (id
);
2864 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2868 /* Declare a local label named ID. */
2871 declare_local_label (tree id
)
2874 cp_label_binding bind
;
2876 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2877 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2878 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2880 decl
= make_label_decl (id
, /*local_p=*/1);
2882 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2887 /* Returns nonzero if it is ill-formed to jump past the declaration of
2888 DECL. Returns 2 if it's also a real problem. */
2891 decl_jump_unsafe (tree decl
)
2893 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2894 with automatic storage duration is not in scope to a point where it is
2895 in scope is ill-formed unless the variable has scalar type, class type
2896 with a trivial default constructor and a trivial destructor, a
2897 cv-qualified version of one of these types, or an array of one of the
2898 preceding types and is declared without an initializer (8.5). */
2899 tree type
= TREE_TYPE (decl
);
2901 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2902 || type
== error_mark_node
)
2905 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2906 || variably_modified_type_p (type
, NULL_TREE
))
2909 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2915 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2918 identify_goto (tree decl
, const location_t
*locus
)
2920 bool complained
= (decl
2921 ? permerror (input_location
, "jump to label %qD", decl
)
2922 : permerror (input_location
, "jump to case label"));
2923 if (complained
&& locus
)
2924 inform (*locus
, " from here");
2928 /* Check that a single previously seen jump to a newly defined label
2929 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2930 the jump context; NAMES are the names in scope in LEVEL at the jump
2931 context; LOCUS is the source position of the jump or 0. Returns
2932 true if all is well. */
2935 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2936 bool exited_omp
, const location_t
*locus
)
2938 cp_binding_level
*b
;
2939 bool identified
= false, complained
= false;
2940 bool saw_eh
= false, saw_omp
= false;
2944 complained
= identify_goto (decl
, locus
);
2946 inform (input_location
, " exits OpenMP structured block");
2947 identified
= saw_omp
= true;
2950 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2952 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2954 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2955 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2956 : TREE_CHAIN (new_decls
)))
2958 int problem
= decl_jump_unsafe (new_decls
);
2964 complained
= identify_goto (decl
, locus
);
2970 inform (input_location
,
2971 " crosses initialization of %q+#D", new_decls
);
2973 inform (input_location
, " enters scope of %q+#D which has "
2974 "non-trivial destructor", new_decls
);
2980 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2984 complained
= identify_goto (decl
, locus
);
2989 if (b
->kind
== sk_try
)
2990 inform (input_location
, " enters try block");
2992 inform (input_location
, " enters catch block");
2996 if (b
->kind
== sk_omp
&& !saw_omp
)
3000 complained
= identify_goto (decl
, locus
);
3004 inform (input_location
, " enters OpenMP structured block");
3013 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
3015 check_previous_goto_1 (decl
, use
->binding_level
,
3016 use
->names_in_scope
, use
->in_omp_scope
,
3017 &use
->o_goto_locus
);
3021 check_switch_goto (cp_binding_level
* level
)
3023 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3026 /* Check that a new jump to a label DECL is OK. Called by
3027 finish_goto_stmt. */
3030 check_goto (tree decl
)
3032 struct named_label_entry
*ent
, dummy
;
3033 bool saw_catch
= false, identified
= false, complained
= false;
3037 /* We can't know where a computed goto is jumping.
3038 So we assume that it's OK. */
3039 if (TREE_CODE (decl
) != LABEL_DECL
)
3042 /* We didn't record any information about this label when we created it,
3043 and there's not much point since it's trivial to analyze as a return. */
3044 if (decl
== cdtor_label
)
3047 dummy
.label_decl
= decl
;
3048 ent
= named_labels
->find (&dummy
);
3049 gcc_assert (ent
!= NULL
);
3051 /* If the label hasn't been defined yet, defer checking. */
3052 if (! DECL_INITIAL (decl
))
3054 struct named_label_use_entry
*new_use
;
3056 /* Don't bother creating another use if the last goto had the
3057 same data, and will therefore create the same set of errors. */
3059 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3062 new_use
= ggc_alloc
<named_label_use_entry
> ();
3063 new_use
->binding_level
= current_binding_level
;
3064 new_use
->names_in_scope
= current_binding_level
->names
;
3065 new_use
->o_goto_locus
= input_location
;
3066 new_use
->in_omp_scope
= false;
3068 new_use
->next
= ent
->uses
;
3069 ent
->uses
= new_use
;
3073 if (ent
->in_try_scope
|| ent
->in_catch_scope
3074 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3076 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3078 inform (input_location
, " from here");
3082 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3084 int u
= decl_jump_unsafe (bad
);
3086 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3088 /* Can't skip init of __exception_info. */
3090 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3093 else if (complained
)
3096 inform (input_location
, " skips initialization of %q+#D", bad
);
3098 inform (input_location
, " enters scope of %q+#D which has "
3099 "non-trivial destructor", bad
);
3105 if (ent
->in_try_scope
)
3106 inform (input_location
, " enters try block");
3107 else if (ent
->in_catch_scope
&& !saw_catch
)
3108 inform (input_location
, " enters catch block");
3111 if (ent
->in_omp_scope
)
3114 inform (input_location
, " enters OpenMP structured block");
3116 else if (flag_openmp
)
3118 cp_binding_level
*b
;
3119 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3121 if (b
== ent
->binding_level
)
3123 if (b
->kind
== sk_omp
)
3127 complained
= permerror (input_location
,
3128 "jump to label %q+D", decl
);
3130 inform (input_location
, " from here");
3134 inform (input_location
, " exits OpenMP structured block");
3141 /* Check that a return is ok wrt OpenMP structured blocks.
3142 Called by finish_return_stmt. Returns true if all is well. */
3145 check_omp_return (void)
3147 cp_binding_level
*b
;
3148 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3149 if (b
->kind
== sk_omp
)
3151 error ("invalid exit from OpenMP structured block");
3154 else if (b
->kind
== sk_function_parms
)
3159 /* Define a label, specifying the location in the source file.
3160 Return the LABEL_DECL node for the label. */
3163 define_label_1 (location_t location
, tree name
)
3165 struct named_label_entry
*ent
, dummy
;
3166 cp_binding_level
*p
;
3169 decl
= lookup_label (name
);
3171 dummy
.label_decl
= decl
;
3172 ent
= named_labels
->find (&dummy
);
3173 gcc_assert (ent
!= NULL
);
3175 /* After labels, make any new cleanups in the function go into their
3176 own new (temporary) binding contour. */
3177 for (p
= current_binding_level
;
3178 p
->kind
!= sk_function_parms
;
3180 p
->more_cleanups_ok
= 0;
3182 if (name
== get_identifier ("wchar_t"))
3183 permerror (input_location
, "label named wchar_t");
3185 if (DECL_INITIAL (decl
) != NULL_TREE
)
3187 error ("duplicate label %qD", decl
);
3188 return error_mark_node
;
3192 struct named_label_use_entry
*use
;
3194 /* Mark label as having been defined. */
3195 DECL_INITIAL (decl
) = error_mark_node
;
3196 /* Say where in the source. */
3197 DECL_SOURCE_LOCATION (decl
) = location
;
3199 ent
->binding_level
= current_binding_level
;
3200 ent
->names_in_scope
= current_binding_level
->names
;
3202 for (use
= ent
->uses
; use
; use
= use
->next
)
3203 check_previous_goto (decl
, use
);
3210 /* Wrapper for define_label_1. */
3213 define_label (location_t location
, tree name
)
3216 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3217 ret
= define_label_1 (location
, name
);
3218 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3225 cp_binding_level
*level
;
3226 struct cp_switch
*next
;
3227 /* The SWITCH_STMT being built. */
3229 /* A splay-tree mapping the low element of a case range to the high
3230 element, or NULL_TREE if there is no high element. Used to
3231 determine whether or not a new case label duplicates an old case
3232 label. We need a tree, rather than simply a hash table, because
3233 of the GNU case range extension. */
3237 /* A stack of the currently active switch statements. The innermost
3238 switch statement is on the top of the stack. There is no need to
3239 mark the stack for garbage collection because it is only active
3240 during the processing of the body of a function, and we never
3241 collect at that point. */
3243 static struct cp_switch
*switch_stack
;
3245 /* Called right after a switch-statement condition is parsed.
3246 SWITCH_STMT is the switch statement being parsed. */
3249 push_switch (tree switch_stmt
)
3251 struct cp_switch
*p
= XNEW (struct cp_switch
);
3252 p
->level
= current_binding_level
;
3253 p
->next
= switch_stack
;
3254 p
->switch_stmt
= switch_stmt
;
3255 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3262 struct cp_switch
*cs
= switch_stack
;
3263 location_t switch_location
;
3265 /* Emit warnings as needed. */
3266 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3267 if (!processing_template_decl
)
3268 c_do_switch_warnings (cs
->cases
, switch_location
,
3269 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3270 SWITCH_STMT_COND (cs
->switch_stmt
));
3272 splay_tree_delete (cs
->cases
);
3273 switch_stack
= switch_stack
->next
;
3277 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3278 condition. Note that if TYPE and VALUE are already integral we don't
3279 really do the conversion because the language-independent
3280 warning/optimization code will work better that way. */
3283 case_conversion (tree type
, tree value
)
3285 if (value
== NULL_TREE
)
3288 if (cxx_dialect
>= cxx11
3289 && (SCOPED_ENUM_P (type
)
3290 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3292 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3293 type
= type_promotes_to (type
);
3294 value
= (perform_implicit_conversion_flags
3295 (type
, value
, tf_warning_or_error
,
3296 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3298 return cxx_constant_value (value
);
3301 /* Note that we've seen a definition of a case label, and complain if this
3302 is a bad place for one. */
3305 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3308 cp_binding_level
*p
;
3311 if (processing_template_decl
)
3315 /* For templates, just add the case label; we'll do semantic
3316 analysis at instantiation-time. */
3317 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3318 return add_stmt (build_case_label (low_value
, high_value
, label
));
3321 /* Find the condition on which this switch statement depends. */
3322 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3323 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3324 cond
= TREE_VALUE (cond
);
3326 if (!check_switch_goto (switch_stack
->level
))
3327 return error_mark_node
;
3329 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3331 low_value
= case_conversion (type
, low_value
);
3332 high_value
= case_conversion (type
, high_value
);
3334 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3335 low_value
, high_value
);
3337 /* After labels, make any new cleanups in the function go into their
3338 own new (temporary) binding contour. */
3339 for (p
= current_binding_level
;
3340 p
->kind
!= sk_function_parms
;
3342 p
->more_cleanups_ok
= 0;
3347 struct typename_info
{
3355 struct typename_hasher
: ggc_hasher
<tree
>
3357 typedef typename_info
*compare_type
;
3359 /* Hash a TYPENAME_TYPE. */
3366 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3367 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3372 /* Compare two TYPENAME_TYPEs. */
3375 equal (tree t1
, const typename_info
*t2
)
3377 return (TYPE_IDENTIFIER (t1
) == t2
->name
3378 && TYPE_CONTEXT (t1
) == t2
->scope
3379 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3380 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3381 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3385 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3386 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3388 Returns the new TYPENAME_TYPE. */
3390 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3393 build_typename_type (tree context
, tree name
, tree fullname
,
3394 enum tag_types tag_type
)
3402 if (typename_htab
== NULL
)
3403 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3405 ti
.scope
= FROB_CONTEXT (context
);
3407 ti
.template_id
= fullname
;
3408 ti
.enum_p
= tag_type
== enum_type
;
3409 ti
.class_p
= (tag_type
== class_type
3410 || tag_type
== record_type
3411 || tag_type
== union_type
);
3412 hash
= (htab_hash_pointer (ti
.scope
)
3413 ^ htab_hash_pointer (ti
.name
));
3415 /* See if we already have this type. */
3416 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3421 /* Build the TYPENAME_TYPE. */
3422 t
= cxx_make_type (TYPENAME_TYPE
);
3423 TYPE_CONTEXT (t
) = ti
.scope
;
3424 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3425 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3426 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3428 /* Build the corresponding TYPE_DECL. */
3429 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3430 TYPE_NAME (TREE_TYPE (d
)) = d
;
3431 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3432 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3433 DECL_ARTIFICIAL (d
) = 1;
3435 /* Store it in the hash table. */
3438 /* TYPENAME_TYPEs must always be compared structurally, because
3439 they may or may not resolve down to another type depending on
3440 the currently open classes. */
3441 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3447 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3448 provided to name the type. Returns an appropriate type, unless an
3449 error occurs, in which case error_mark_node is returned. If we
3450 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3451 return that, rather than the _TYPE it corresponds to, in other
3452 cases we look through the type decl. If TF_ERROR is set, complain
3453 about errors, otherwise be quiet. */
3456 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3457 tsubst_flags_t complain
)
3463 if (name
== error_mark_node
3464 || context
== NULL_TREE
3465 || context
== error_mark_node
)
3466 return error_mark_node
;
3470 if (!(TYPE_LANG_SPECIFIC (name
)
3471 && (CLASSTYPE_IS_TEMPLATE (name
)
3472 || CLASSTYPE_USE_TEMPLATE (name
))))
3473 name
= TYPE_IDENTIFIER (name
);
3475 /* Create a TEMPLATE_ID_EXPR for the type. */
3476 name
= build_nt (TEMPLATE_ID_EXPR
,
3477 CLASSTYPE_TI_TEMPLATE (name
),
3478 CLASSTYPE_TI_ARGS (name
));
3480 else if (TREE_CODE (name
) == TYPE_DECL
)
3481 name
= DECL_NAME (name
);
3485 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3487 name
= TREE_OPERAND (name
, 0);
3488 if (DECL_TYPE_TEMPLATE_P (name
))
3489 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3490 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3492 if (complain
& tf_error
)
3493 error ("%qD is not a type", name
);
3494 return error_mark_node
;
3497 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3499 if (complain
& tf_error
)
3500 error ("%qD used without template parameters", name
);
3501 return error_mark_node
;
3503 gcc_assert (identifier_p (name
));
3504 gcc_assert (TYPE_P (context
));
3506 if (!MAYBE_CLASS_TYPE_P (context
))
3508 if (complain
& tf_error
)
3509 error ("%q#T is not a class", context
);
3510 return error_mark_node
;
3513 /* When the CONTEXT is a dependent type, NAME could refer to a
3514 dependent base class of CONTEXT. But look inside it anyway
3515 if CONTEXT is a currently open scope, in case it refers to a
3516 member of the current instantiation or a non-dependent base;
3517 lookup will stop when we hit a dependent base. */
3518 if (!dependent_scope_p (context
))
3519 /* We should only set WANT_TYPE when we're a nested typename type.
3520 Then we can give better diagnostics if we find a non-type. */
3521 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3525 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3526 return build_typename_type (context
, name
, fullname
, tag_type
);
3528 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3532 if (complain
& tf_error
)
3533 error (want_template
? G_("no class template named %q#T in %q#T")
3534 : G_("no type named %q#T in %q#T"), name
, context
);
3535 return error_mark_node
;
3538 /* Pull out the template from an injected-class-name (or multiple). */
3540 t
= maybe_get_template_decl_from_type_decl (t
);
3542 if (TREE_CODE (t
) == TREE_LIST
)
3544 if (complain
& tf_error
)
3546 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3547 print_candidates (t
);
3549 return error_mark_node
;
3552 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3554 if (complain
& tf_error
)
3555 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3557 return error_mark_node
;
3559 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3561 if (complain
& tf_error
)
3562 error ("%<typename %T::%D%> names %q#T, which is not a type",
3564 return error_mark_node
;
3567 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3568 return error_mark_node
;
3570 /* If we are currently parsing a template and if T is a typedef accessed
3571 through CONTEXT then we need to remember and check access of T at
3572 template instantiation time. */
3573 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3576 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3578 /*entering_scope=*/0,
3579 complain
| tf_user
);
3581 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3584 maybe_record_typedef_use (t
);
3589 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3590 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3591 in which case error_mark_node is returned.
3593 If PARM_LIST is non-NULL, also make sure that the template parameter
3594 list of TEMPLATE_DECL matches.
3596 If COMPLAIN zero, don't complain about any errors that occur. */
3599 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3600 tsubst_flags_t complain
)
3606 name
= TYPE_IDENTIFIER (name
);
3607 else if (DECL_P (name
))
3608 name
= DECL_NAME (name
);
3609 gcc_assert (identifier_p (name
));
3611 if (!dependent_type_p (context
)
3612 || currently_open_class (context
))
3614 tree tmpl
= NULL_TREE
;
3616 if (MAYBE_CLASS_TYPE_P (context
))
3617 tmpl
= lookup_field (context
, name
, 0, false);
3619 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3620 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3622 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3624 if (complain
& tf_error
)
3625 error ("no class template named %q#T in %q#T", name
, context
);
3626 return error_mark_node
;
3630 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3632 if (complain
& tf_error
)
3634 error ("template parameters do not match template %qD", tmpl
);
3635 inform (DECL_SOURCE_LOCATION (tmpl
),
3636 "%qD declared here", tmpl
);
3638 return error_mark_node
;
3641 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3643 return error_mark_node
;
3648 /* Build the UNBOUND_CLASS_TEMPLATE. */
3649 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3650 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3651 TREE_TYPE (t
) = NULL_TREE
;
3652 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3654 /* Build the corresponding TEMPLATE_DECL. */
3655 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3656 TYPE_NAME (TREE_TYPE (d
)) = d
;
3657 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3658 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3659 DECL_ARTIFICIAL (d
) = 1;
3660 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3667 /* Push the declarations of builtin types into the namespace.
3668 RID_INDEX is the index of the builtin type in the array
3669 RID_POINTERS. NAME is the name used when looking up the builtin
3670 type. TYPE is the _TYPE node for the builtin type. */
3673 record_builtin_type (enum rid rid_index
,
3677 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3678 tree tdecl
= NULL_TREE
;
3680 if ((int) rid_index
< (int) RID_MAX
)
3681 rname
= ridpointers
[(int) rid_index
];
3683 tname
= get_identifier (name
);
3685 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3686 eliminated. Built-in types should not be looked up name; their
3687 names are keywords that the parser can recognize. However, there
3688 is code in c-common.c that uses identifier_global_value to look
3689 up built-in types by name. */
3692 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3693 DECL_ARTIFICIAL (tdecl
) = 1;
3694 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3700 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3701 DECL_ARTIFICIAL (tdecl
) = 1;
3703 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3706 if (!TYPE_NAME (type
))
3707 TYPE_NAME (type
) = tdecl
;
3710 debug_hooks
->type_decl (tdecl
, 0);
3713 /* Record one of the standard Java types.
3714 * Declare it as having the given NAME.
3715 * If SIZE > 0, it is the size of one of the integral types;
3716 * otherwise it is the negative of the size of one of the other types. */
3719 record_builtin_java_type (const char* name
, int size
)
3724 type
= build_nonstandard_integer_type (size
, 0);
3725 type
= build_distinct_type_copy (type
);
3727 else if (size
> -32)
3730 /* "__java_char" or ""__java_boolean". */
3731 type
= build_nonstandard_integer_type (-size
, 1);
3732 type
= build_distinct_type_copy (type
);
3733 /* Get the signed type cached and attached to the unsigned type,
3734 so it doesn't get garbage-collected at "random" times,
3735 causing potential codegen differences out of different UIDs
3736 and different alias set numbers. */
3737 stype
= build_nonstandard_integer_type (-size
, 0);
3738 stype
= build_distinct_type_copy (stype
);
3739 TREE_CHAIN (type
) = stype
;
3740 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3743 { /* "__java_float" or ""__java_double". */
3744 type
= make_node (REAL_TYPE
);
3745 TYPE_PRECISION (type
) = - size
;
3748 record_builtin_type (RID_MAX
, name
, type
);
3749 decl
= TYPE_NAME (type
);
3751 /* Suppress generate debug symbol entries for these types,
3752 since for normal C++ they are just clutter.
3753 However, push_lang_context undoes this if extern "Java" is seen. */
3754 DECL_IGNORED_P (decl
) = 1;
3756 TYPE_FOR_JAVA (type
) = 1;
3760 /* Push a type into the namespace so that the back ends ignore it. */
3763 record_unknown_type (tree type
, const char* name
)
3765 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3766 TYPE_DECL
, get_identifier (name
), type
));
3767 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3768 DECL_IGNORED_P (decl
) = 1;
3769 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3770 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3771 TYPE_ALIGN (type
) = 1;
3772 TYPE_USER_ALIGN (type
) = 0;
3773 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3776 /* A string for which we should create an IDENTIFIER_NODE at
3779 typedef struct predefined_identifier
3781 /* The name of the identifier. */
3782 const char *const name
;
3783 /* The place where the IDENTIFIER_NODE should be stored. */
3785 /* Nonzero if this is the name of a constructor or destructor. */
3786 const int ctor_or_dtor_p
;
3787 } predefined_identifier
;
3789 /* Create all the predefined identifiers. */
3792 initialize_predefined_identifiers (void)
3794 const predefined_identifier
*pid
;
3796 /* A table of identifiers to create at startup. */
3797 static const predefined_identifier predefined_identifiers
[] = {
3798 { "C++", &lang_name_cplusplus
, 0 },
3799 { "C", &lang_name_c
, 0 },
3800 { "Java", &lang_name_java
, 0 },
3801 /* Some of these names have a trailing space so that it is
3802 impossible for them to conflict with names written by users. */
3803 { "__ct ", &ctor_identifier
, 1 },
3804 { "__base_ctor ", &base_ctor_identifier
, 1 },
3805 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3806 { "__dt ", &dtor_identifier
, 1 },
3807 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3808 { "__base_dtor ", &base_dtor_identifier
, 1 },
3809 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3810 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3811 { "nelts", &nelts_identifier
, 0 },
3812 { THIS_NAME
, &this_identifier
, 0 },
3813 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3814 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3815 { "_vptr", &vptr_identifier
, 0 },
3816 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3817 { "::", &global_scope_name
, 0 },
3818 { "std", &std_identifier
, 0 },
3822 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3824 *pid
->node
= get_identifier (pid
->name
);
3825 if (pid
->ctor_or_dtor_p
)
3826 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3830 /* Create the predefined scalar types of C,
3831 and some nodes representing standard constants (0, 1, (void *)0).
3832 Initialize the global binding level.
3833 Make definitions for built-in primitive functions. */
3836 cxx_init_decl_processing (void)
3839 tree void_ftype_ptr
;
3841 /* Create all the identifiers we need. */
3842 initialize_predefined_identifiers ();
3844 /* Create the global variables. */
3845 push_to_top_level ();
3847 current_function_decl
= NULL_TREE
;
3848 current_binding_level
= NULL
;
3849 /* Enter the global namespace. */
3850 gcc_assert (global_namespace
== NULL_TREE
);
3851 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3853 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3854 TREE_PUBLIC (global_namespace
) = 1;
3855 begin_scope (sk_namespace
, global_namespace
);
3857 if (flag_visibility_ms_compat
)
3858 default_visibility
= VISIBILITY_HIDDEN
;
3861 current_lang_name
= lang_name_c
;
3863 /* Create the `std' namespace. */
3864 push_namespace (std_identifier
);
3865 std_node
= current_namespace
;
3868 c_common_nodes_and_builtins ();
3870 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3871 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3872 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3873 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3874 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3875 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3876 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3877 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3879 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3881 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3882 truthvalue_type_node
= boolean_type_node
;
3883 truthvalue_false_node
= boolean_false_node
;
3884 truthvalue_true_node
= boolean_true_node
;
3886 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3887 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3888 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3891 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3894 delta_type_node
= ptrdiff_type_node
;
3895 vtable_index_type
= ptrdiff_type_node
;
3897 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3898 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3899 void_ftype_ptr
= build_function_type_list (void_type_node
,
3900 ptr_type_node
, NULL_TREE
);
3902 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3904 /* C++ extensions */
3906 unknown_type_node
= make_node (LANG_TYPE
);
3907 record_unknown_type (unknown_type_node
, "unknown type");
3909 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3910 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3912 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3914 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3915 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3917 init_list_type_node
= make_node (LANG_TYPE
);
3918 record_unknown_type (init_list_type_node
, "init list");
3921 /* Make sure we get a unique function type, so we can give
3922 its pointer type a name. (This wins for gdb.) */
3923 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3924 TREE_TYPE (vfunc_type
) = integer_type_node
;
3925 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3926 layout_type (vfunc_type
);
3928 vtable_entry_type
= build_pointer_type (vfunc_type
);
3930 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3933 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3934 layout_type (vtbl_type_node
);
3935 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3936 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3937 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3938 layout_type (vtbl_ptr_type_node
);
3939 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3941 push_namespace (get_identifier ("__cxxabiv1"));
3942 abi_node
= current_namespace
;
3945 global_type_node
= make_node (LANG_TYPE
);
3946 record_unknown_type (global_type_node
, "global type");
3949 current_lang_name
= lang_name_cplusplus
;
3952 tree newattrs
, extvisattr
;
3953 tree newtype
, deltype
;
3954 tree ptr_ftype_sizetype
;
3958 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3959 if (cxx_dialect
== cxx98
)
3962 tree bad_alloc_type_node
;
3963 tree bad_alloc_decl
;
3965 push_namespace (std_identifier
);
3966 bad_alloc_id
= get_identifier ("bad_alloc");
3967 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3968 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3970 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3971 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3975 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3978 new_eh_spec
= noexcept_false_spec
;
3980 /* Ensure attribs.c is initialized. */
3982 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3984 newattrs
= tree_cons (get_identifier ("alloc_size"),
3985 build_tree_list (NULL_TREE
, integer_one_node
),
3987 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3988 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3989 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3990 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3991 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3992 DECL_IS_MALLOC (opnew
) = 1;
3993 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3994 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3995 DECL_IS_MALLOC (opnew
) = 1;
3996 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3997 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3998 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3999 if (flag_sized_deallocation
)
4001 /* Also push the sized deallocation variants:
4002 void operator delete(void*, std::size_t) throw();
4003 void operator delete[](void*, std::size_t) throw(); */
4004 tree void_ftype_ptr_size
4005 = build_function_type_list (void_type_node
, ptr_type_node
,
4006 size_type_node
, NULL_TREE
);
4007 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4009 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4010 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4011 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4014 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4015 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4016 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4017 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4018 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4019 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4020 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4021 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4025 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4026 ECF_NORETURN
| ECF_NOTHROW
);
4028 /* Perform other language dependent initializations. */
4029 init_class_processing ();
4030 init_rtti_processing ();
4031 init_template_processing ();
4033 if (flag_exceptions
)
4034 init_exception_processing ();
4036 if (! supports_one_only ())
4039 make_fname_decl
= cp_make_fname_decl
;
4040 start_fname_decls ();
4042 /* Show we use EH for cleanups. */
4043 if (flag_exceptions
)
4044 using_eh_for_cleanups ();
4047 /* Generate an initializer for a function naming variable from
4048 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4049 filled in with the type of the init. */
4052 cp_fname_init (const char* name
, tree
*type_p
)
4054 tree domain
= NULL_TREE
;
4056 tree init
= NULL_TREE
;
4061 length
= strlen (name
);
4062 domain
= build_index_type (size_int (length
));
4063 init
= build_string (length
+ 1, name
);
4066 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4067 type
= build_cplus_array_type (type
, domain
);
4072 TREE_TYPE (init
) = type
;
4074 init
= error_mark_node
;
4079 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4080 the decl, LOC is the location to give the decl, NAME is the
4081 initialization string and TYPE_DEP indicates whether NAME depended
4082 on the type of the function. We make use of that to detect
4083 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4084 at the point of first use, so we mustn't push the decl now. */
4087 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4089 const char *const name
= (type_dep
&& processing_template_decl
4090 ? NULL
: fname_as_string (type_dep
));
4092 tree init
= cp_fname_init (name
, &type
);
4093 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4096 free (CONST_CAST (char *, name
));
4098 /* As we're using pushdecl_with_scope, we must set the context. */
4099 DECL_CONTEXT (decl
) = current_function_decl
;
4101 TREE_STATIC (decl
) = 1;
4102 TREE_READONLY (decl
) = 1;
4103 DECL_ARTIFICIAL (decl
) = 1;
4105 TREE_USED (decl
) = 1;
4107 if (current_function_decl
)
4109 cp_binding_level
*b
= current_binding_level
;
4110 if (b
->kind
== sk_function_parms
)
4111 return error_mark_node
;
4112 while (b
->level_chain
->kind
!= sk_function_parms
)
4114 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4115 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4116 LOOKUP_ONLYCONVERTING
);
4120 DECL_THIS_STATIC (decl
) = true;
4121 pushdecl_top_level_and_finish (decl
, init
);
4128 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4130 tree id
= DECL_NAME (decl
);
4131 const char *name
= IDENTIFIER_POINTER (id
);
4133 retrofit_lang_decl (decl
);
4135 DECL_ARTIFICIAL (decl
) = 1;
4136 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4137 SET_DECL_LANGUAGE (decl
, lang_c
);
4138 /* Runtime library routines are, by definition, available in an
4139 external shared object. */
4140 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4141 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4143 DECL_CONTEXT (decl
) = context
;
4146 pushdecl_top_level (decl
);
4150 /* A function in the user's namespace should have an explicit
4151 declaration before it is used. Mark the built-in function as
4152 anticipated but not actually declared. */
4153 if (name
[0] != '_' || name
[1] != '_')
4154 DECL_ANTICIPATED (decl
) = 1;
4155 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4157 size_t len
= strlen (name
);
4159 /* Treat __*_chk fortification functions as anticipated as well,
4160 unless they are __builtin_*. */
4161 if (len
> strlen ("___chk")
4162 && memcmp (name
+ len
- strlen ("_chk"),
4163 "_chk", strlen ("_chk") + 1) == 0)
4164 DECL_ANTICIPATED (decl
) = 1;
4171 cxx_builtin_function (tree decl
)
4173 tree id
= DECL_NAME (decl
);
4174 const char *name
= IDENTIFIER_POINTER (id
);
4175 /* All builtins that don't begin with an '_' should additionally
4176 go in the 'std' namespace. */
4179 tree decl2
= copy_node(decl
);
4180 push_namespace (std_identifier
);
4181 builtin_function_1 (decl2
, std_node
, false);
4185 return builtin_function_1 (decl
, NULL_TREE
, false);
4188 /* Like cxx_builtin_function, but guarantee the function is added to the global
4189 scope. This is to allow function specific options to add new machine
4190 dependent builtins when the target ISA changes via attribute((target(...)))
4191 which saves space on program startup if the program does not use non-generic
4195 cxx_builtin_function_ext_scope (tree decl
)
4198 tree id
= DECL_NAME (decl
);
4199 const char *name
= IDENTIFIER_POINTER (id
);
4200 /* All builtins that don't begin with an '_' should additionally
4201 go in the 'std' namespace. */
4204 tree decl2
= copy_node(decl
);
4205 push_namespace (std_identifier
);
4206 builtin_function_1 (decl2
, std_node
, true);
4210 return builtin_function_1 (decl
, NULL_TREE
, true);
4213 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4214 function. Not called directly. */
4217 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4220 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4221 DECL_EXTERNAL (fn
) = 1;
4222 TREE_PUBLIC (fn
) = 1;
4223 DECL_ARTIFICIAL (fn
) = 1;
4224 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4225 SET_DECL_LANGUAGE (fn
, lang_c
);
4226 /* Runtime library routines are, by definition, available in an
4227 external shared object. */
4228 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4229 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4230 set_call_expr_flags (fn
, ecf_flags
);
4234 /* Returns the _DECL for a library function with C++ linkage. */
4237 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4240 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4241 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4242 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4246 /* Like build_library_fn, but takes a C string instead of an
4250 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4252 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4255 /* Like build_cp_library_fn, but takes a C string instead of an
4259 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4261 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4265 /* Like build_library_fn, but also pushes the function so that we will
4266 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4267 may throw exceptions listed in RAISES. */
4270 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4275 type
= build_exception_variant (type
, raises
);
4277 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4278 pushdecl_top_level (fn
);
4282 /* Like build_cp_library_fn, but also pushes the function so that it
4283 will be found by normal lookup. */
4286 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4289 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4294 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4298 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4302 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4304 tree type
= build_function_type (void_type_node
, parmtypes
);
4305 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4308 /* Like push_library_fn, but also note that this function throws
4309 and does not return. Used for __throw_foo and the like. */
4312 push_throw_library_fn (tree name
, tree type
)
4314 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4318 /* When we call finish_struct for an anonymous union, we create
4319 default copy constructors and such. But, an anonymous union
4320 shouldn't have such things; this function undoes the damage to the
4321 anonymous union type T.
4323 (The reason that we create the synthesized methods is that we don't
4324 distinguish `union { int i; }' from `typedef union { int i; } U'.
4325 The first is an anonymous union; the second is just an ordinary
4329 fixup_anonymous_aggr (tree t
)
4333 /* Wipe out memory of synthesized methods. */
4334 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4335 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4336 TYPE_HAS_COPY_CTOR (t
) = 0;
4337 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4338 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4339 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4341 /* Splice the implicitly generated functions out of the TYPE_METHODS
4343 q
= &TYPE_METHODS (t
);
4346 if (DECL_ARTIFICIAL (*q
))
4347 *q
= TREE_CHAIN (*q
);
4349 q
= &DECL_CHAIN (*q
);
4352 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4353 if (TYPE_METHODS (t
))
4355 tree decl
= TYPE_MAIN_DECL (t
);
4357 if (TREE_CODE (t
) != UNION_TYPE
)
4358 error_at (DECL_SOURCE_LOCATION (decl
),
4359 "an anonymous struct cannot have function members");
4361 error_at (DECL_SOURCE_LOCATION (decl
),
4362 "an anonymous union cannot have function members");
4365 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4366 assignment operators (because they cannot have these methods themselves).
4367 For anonymous unions this is already checked because they are not allowed
4368 in any union, otherwise we have to check it. */
4369 if (TREE_CODE (t
) != UNION_TYPE
)
4373 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4374 if (TREE_CODE (field
) == FIELD_DECL
)
4376 type
= TREE_TYPE (field
);
4377 if (CLASS_TYPE_P (type
))
4379 if (TYPE_NEEDS_CONSTRUCTING (type
))
4380 error ("member %q+#D with constructor not allowed "
4381 "in anonymous aggregate", field
);
4382 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4383 error ("member %q+#D with destructor not allowed "
4384 "in anonymous aggregate", field
);
4385 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4386 error ("member %q+#D with copy assignment operator "
4387 "not allowed in anonymous aggregate", field
);
4393 /* Warn for an attribute located at LOCATION that appertains to the
4394 class type CLASS_TYPE that has not been properly placed after its
4395 class-key, in it class-specifier. */
4398 warn_misplaced_attr_for_class_type (source_location location
,
4401 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4403 if (warning_at (location
, OPT_Wattributes
,
4404 "attribute ignored in declaration "
4405 "of %q#T", class_type
))
4407 "attribute for %q#T must follow the %qs keyword",
4408 class_type
, class_key_or_enum_as_string (class_type
));
4411 /* Make sure that a declaration with no declarator is well-formed, i.e.
4412 just declares a tagged type or anonymous union.
4414 Returns the type declared; or NULL_TREE if none. */
4417 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4418 bool explicit_type_instantiation_p
)
4420 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4421 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4422 /* If a class, struct, or enum type is declared by the DECLSPECS
4423 (i.e, if a class-specifier, enum-specifier, or non-typename
4424 elaborated-type-specifier appears in the DECLSPECS),
4425 DECLARED_TYPE is set to the corresponding type. */
4426 tree declared_type
= NULL_TREE
;
4427 bool error_p
= false;
4429 if (declspecs
->multiple_types_p
)
4430 error ("multiple types in one declaration");
4431 else if (declspecs
->redefined_builtin_type
)
4433 if (!in_system_header_at (input_location
))
4434 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4435 "redeclaration of C++ built-in type %qT",
4436 declspecs
->redefined_builtin_type
);
4441 && TYPE_P (declspecs
->type
)
4442 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4443 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4444 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4445 declared_type
= declspecs
->type
;
4446 else if (declspecs
->type
== error_mark_node
)
4448 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4449 permerror (input_location
, "declaration does not declare anything");
4450 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4452 error ("%<auto%> can only be specified for variables "
4453 "or function declarations");
4454 return error_mark_node
;
4456 /* Check for an anonymous union. */
4457 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4458 && TYPE_ANONYMOUS_P (declared_type
))
4460 /* 7/3 In a simple-declaration, the optional init-declarator-list
4461 can be omitted only when declaring a class (clause 9) or
4462 enumeration (7.2), that is, when the decl-specifier-seq contains
4463 either a class-specifier, an elaborated-type-specifier with
4464 a class-key (9.1), or an enum-specifier. In these cases and
4465 whenever a class-specifier or enum-specifier is present in the
4466 decl-specifier-seq, the identifiers in these specifiers are among
4467 the names being declared by the declaration (as class-name,
4468 enum-names, or enumerators, depending on the syntax). In such
4469 cases, and except for the declaration of an unnamed bit-field (9.6),
4470 the decl-specifier-seq shall introduce one or more names into the
4471 program, or shall redeclare a name introduced by a previous
4472 declaration. [Example:
4473 enum { }; // ill-formed
4474 typedef class { }; // ill-formed
4478 error ("missing type-name in typedef-declaration");
4481 /* Anonymous unions are objects, so they can have specifiers. */;
4482 SET_ANON_AGGR_TYPE_P (declared_type
);
4484 if (TREE_CODE (declared_type
) != UNION_TYPE
4485 && !in_system_header_at (input_location
))
4486 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4491 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4492 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4493 error ("%qs can only be specified for functions",
4494 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4495 ? "inline" : "virtual");
4497 && (!current_class_type
4498 || current_scope () != current_class_type
))
4499 error ("%<friend%> can only be specified inside a class");
4500 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4501 error ("%<explicit%> can only be specified for constructors");
4502 else if (declspecs
->storage_class
)
4503 error ("a storage class can only be specified for objects "
4505 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4506 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4507 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4508 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4509 error ("qualifiers can only be specified for objects "
4511 else if (saw_typedef
)
4512 warning (0, "%<typedef%> was ignored in this declaration");
4513 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4514 error ("%<constexpr%> cannot be used for type declarations");
4517 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4520 if (!CLASS_TYPE_P (declared_type
)
4521 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4522 /* For a non-template class, use the name location. */
4523 loc
= location_of (declared_type
);
4525 /* For a template class (an explicit instantiation), use the
4526 current location. */
4527 loc
= input_location
;
4529 if (explicit_type_instantiation_p
)
4530 /* [dcl.attr.grammar]/4:
4532 No attribute-specifier-seq shall appertain to an explicit
4535 if (warning_at (loc
, OPT_Wattributes
,
4536 "attribute ignored in explicit instantiation %q#T",
4539 "no attribute can be applied to "
4540 "an explicit instantiation");
4543 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4546 return declared_type
;
4549 /* Called when a declaration is seen that contains no names to declare.
4550 If its type is a reference to a structure, union or enum inherited
4551 from a containing scope, shadow that tag name for the current scope
4552 with a forward reference.
4553 If its type defines a new named structure or union
4554 or defines an enum, it is valid but we need not do anything here.
4555 Otherwise, it is an error.
4557 C++: may have to grok the declspecs to learn about static,
4558 complain for anonymous unions.
4560 Returns the TYPE declared -- or NULL_TREE if none. */
4563 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4565 tree t
= check_tag_decl (declspecs
,
4566 /*explicit_type_instantiation_p=*/false);
4571 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4574 /* This is where the variables in an anonymous union are
4575 declared. An anonymous union declaration looks like:
4577 because there is no declarator after the union, the parser
4578 sends that declaration here. */
4579 if (ANON_AGGR_TYPE_P (t
))
4581 fixup_anonymous_aggr (t
);
4583 if (TYPE_FIELDS (t
))
4585 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4586 declspecs
, NORMAL
, 0, NULL
);
4587 finish_anon_union (decl
);
4594 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4597 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4598 const cp_declarator
*declarator
,
4599 bool is_template_arg
)
4603 enum decl_context context
4604 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4605 attrs
= type_specifiers
->attributes
;
4606 type_specifiers
->attributes
= NULL_TREE
;
4607 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4608 if (attrs
&& type
!= error_mark_node
)
4610 if (CLASS_TYPE_P (type
))
4611 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4612 "outside of definition", type
);
4613 else if (MAYBE_CLASS_TYPE_P (type
))
4614 /* A template type parameter or other dependent type. */
4615 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4616 "type %qT without an associated declaration", type
);
4618 cplus_decl_attributes (&type
, attrs
, 0);
4623 /* Process a DECLARATOR for a function-scope variable declaration,
4624 namespace-scope variable declaration, or function declaration.
4625 (Function definitions go through start_function; class member
4626 declarations appearing in the body of the class go through
4627 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4628 If an error occurs, the error_mark_node is returned instead.
4630 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4631 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4632 for an explicitly defaulted function, or SD_DELETED for an explicitly
4633 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4634 implicitly initialized via a default constructor. ATTRIBUTES and
4635 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4637 The scope represented by the context of the returned DECL is pushed
4638 (if it is not the global namespace) and is assigned to
4639 *PUSHED_SCOPE_P. The caller is then responsible for calling
4640 pop_scope on *PUSHED_SCOPE_P if it is set. */
4643 start_decl (const cp_declarator
*declarator
,
4644 cp_decl_specifier_seq
*declspecs
,
4647 tree prefix_attributes
,
4648 tree
*pushed_scope_p
)
4656 *pushed_scope_p
= NULL_TREE
;
4658 /* An object declared as __attribute__((deprecated)) suppresses
4659 warnings of uses of other deprecated items. */
4660 if (lookup_attribute ("deprecated", attributes
))
4661 deprecated_state
= DEPRECATED_SUPPRESS
;
4663 attributes
= chainon (attributes
, prefix_attributes
);
4665 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4668 deprecated_state
= DEPRECATED_NORMAL
;
4670 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4671 || decl
== error_mark_node
)
4672 return error_mark_node
;
4674 context
= CP_DECL_CONTEXT (decl
);
4675 if (context
!= global_namespace
)
4676 *pushed_scope_p
= push_scope (context
);
4678 /* Is it valid for this decl to have an initializer at all?
4679 If not, set INITIALIZED to zero, which will indirectly
4680 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4682 && TREE_CODE (decl
) == TYPE_DECL
)
4684 error ("typedef %qD is initialized (use decltype instead)", decl
);
4685 return error_mark_node
;
4690 if (! toplevel_bindings_p ()
4691 && DECL_EXTERNAL (decl
))
4692 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4694 DECL_EXTERNAL (decl
) = 0;
4695 if (toplevel_bindings_p ())
4696 TREE_STATIC (decl
) = 1;
4698 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4700 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4701 record_key_method_defined (decl
);
4703 /* If this is a typedef that names the class for linkage purposes
4704 (7.1.3p8), apply any attributes directly to the type. */
4705 if (TREE_CODE (decl
) == TYPE_DECL
4706 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4707 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4708 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4712 /* Set attributes here so if duplicate decl, will have proper attributes. */
4713 cplus_decl_attributes (&decl
, attributes
, flags
);
4715 /* Dllimported symbols cannot be defined. Static data members (which
4716 can be initialized in-class and dllimported) go through grokfield,
4717 not here, so we don't need to exclude those decls when checking for
4719 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4721 error ("definition of %q#D is marked %<dllimport%>", decl
);
4722 DECL_DLLIMPORT_P (decl
) = 0;
4725 /* If #pragma weak was used, mark the decl weak now. */
4726 if (!processing_template_decl
)
4727 maybe_apply_pragma_weak (decl
);
4729 if (TREE_CODE (decl
) == FUNCTION_DECL
4730 && DECL_DECLARED_INLINE_P (decl
)
4731 && DECL_UNINLINABLE (decl
)
4732 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4733 warning (0, "inline function %q+D given attribute noinline", decl
);
4735 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4737 bool this_tmpl
= (processing_template_decl
4738 > template_class_depth (context
));
4741 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4742 if (field
== NULL_TREE
4743 || !(VAR_P (field
) || variable_template_p (field
)))
4744 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4745 else if (variable_template_p (field
) && !this_tmpl
)
4747 if (DECL_LANG_SPECIFIC (decl
)
4748 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4749 /* OK, specialization was already checked. */;
4752 error_at (DECL_SOURCE_LOCATION (decl
),
4753 "non-member-template declaration of %qD", decl
);
4754 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4755 "member template declaration here");
4756 return error_mark_node
;
4761 if (variable_template_p (field
))
4762 field
= DECL_TEMPLATE_RESULT (field
);
4764 if (DECL_CONTEXT (field
) != context
)
4766 if (!same_type_p (DECL_CONTEXT (field
), context
))
4767 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4768 "to be defined as %<%T::%D%>",
4769 DECL_CONTEXT (field
), DECL_NAME (decl
),
4770 context
, DECL_NAME (decl
));
4771 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4773 /* Static data member are tricky; an in-class initialization
4774 still doesn't provide a definition, so the in-class
4775 declaration will have DECL_EXTERNAL set, but will have an
4776 initialization. Thus, duplicate_decls won't warn
4777 about this situation, and so we check here. */
4778 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4779 error ("duplicate initialization of %qD", decl
);
4780 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4782 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4783 && !DECL_DECLARED_CONSTEXPR_P (field
))
4784 error ("%qD declared %<constexpr%> outside its class", field
);
4789 tree field
= check_classfn (context
, decl
,
4791 ? current_template_parms
4793 if (field
&& field
!= error_mark_node
4794 && duplicate_decls (decl
, field
,
4795 /*newdecl_is_friend=*/false))
4799 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4800 DECL_IN_AGGR_P (decl
) = 0;
4801 /* Do not mark DECL as an explicit specialization if it was not
4802 already marked as an instantiation; a declaration should
4803 never be marked as a specialization unless we know what
4804 template is being specialized. */
4805 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4807 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4808 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4809 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4810 && DECL_DECLARED_INLINE_P (decl
));
4812 DECL_COMDAT (decl
) = false;
4814 /* [temp.expl.spec] An explicit specialization of a static data
4815 member of a template is a definition if the declaration
4816 includes an initializer; otherwise, it is a declaration.
4818 We check for processing_specialization so this only applies
4819 to the new specialization syntax. */
4820 if (!initialized
&& processing_specialization
)
4821 DECL_EXTERNAL (decl
) = 1;
4824 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4825 /* Aliases are definitions. */
4827 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4831 was_public
= TREE_PUBLIC (decl
);
4833 /* Enter this declaration into the symbol table. Don't push the plain
4834 VAR_DECL for a variable template. */
4835 if (!template_parm_scope_p ()
4836 || TREE_CODE (decl
) != VAR_DECL
)
4837 decl
= maybe_push_decl (decl
);
4839 if (processing_template_decl
)
4840 decl
= push_template_decl (decl
);
4841 if (decl
== error_mark_node
)
4842 return error_mark_node
;
4845 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4846 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4848 /* This is a const variable with implicit 'static'. Set
4849 DECL_THIS_STATIC so we can tell it from variables that are
4850 !TREE_PUBLIC because of the anonymous namespace. */
4851 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4852 DECL_THIS_STATIC (decl
) = 1;
4855 if (current_function_decl
&& VAR_P (decl
)
4856 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4859 if (DECL_THREAD_LOCAL_P (decl
))
4860 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4862 else if (TREE_STATIC (decl
))
4863 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4867 cp_function_chain
->invalid_constexpr
= true;
4870 if (!processing_template_decl
&& VAR_P (decl
))
4871 start_decl_1 (decl
, initialized
);
4876 /* Process the declaration of a variable DECL. INITIALIZED is true
4877 iff DECL is explicitly initialized. (INITIALIZED is false if the
4878 variable is initialized via an implicitly-called constructor.)
4879 This function must be called for ordinary variables (including, for
4880 example, implicit instantiations of templates), but must not be
4881 called for template declarations. */
4884 start_decl_1 (tree decl
, bool initialized
)
4888 bool aggregate_definition_p
;
4890 gcc_assert (!processing_template_decl
);
4892 if (error_operand_p (decl
))
4895 gcc_assert (VAR_P (decl
));
4897 type
= TREE_TYPE (decl
);
4898 complete_p
= COMPLETE_TYPE_P (type
);
4899 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4901 /* If an explicit initializer is present, or if this is a definition
4902 of an aggregate, then we need a complete type at this point.
4903 (Scalars are always complete types, so there is nothing to
4904 check.) This code just sets COMPLETE_P; errors (if necessary)
4905 are issued below. */
4906 if ((initialized
|| aggregate_definition_p
)
4908 && COMPLETE_TYPE_P (complete_type (type
)))
4911 /* We will not yet have set TREE_READONLY on DECL if the type
4912 was "const", but incomplete, before this point. But, now, we
4913 have a complete type, so we can try again. */
4914 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4918 /* Is it valid for this decl to have an initializer at all? */
4920 /* Don't allow initializations for incomplete types except for
4921 arrays which might be completed by the initialization. */
4923 ; /* A complete type is ok. */
4924 else if (type_uses_auto (type
))
4925 ; /* An auto type is ok. */
4926 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4928 error ("variable %q#D has initializer but incomplete type", decl
);
4929 type
= TREE_TYPE (decl
) = error_mark_node
;
4931 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4933 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4934 error ("elements of array %q#D have incomplete type", decl
);
4935 /* else we already gave an error in start_decl. */
4938 else if (aggregate_definition_p
&& !complete_p
)
4940 if (type_uses_auto (type
))
4941 error ("declaration of %q#D has no initializer", decl
);
4943 error ("aggregate %q#D has incomplete type and cannot be defined",
4945 /* Change the type so that assemble_variable will give
4946 DECL an rtl we can live with: (mem (const_int 0)). */
4947 type
= TREE_TYPE (decl
) = error_mark_node
;
4950 /* Create a new scope to hold this declaration if necessary.
4951 Whether or not a new scope is necessary cannot be determined
4952 until after the type has been completed; if the type is a
4953 specialization of a class template it is not until after
4954 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4955 will be set correctly. */
4956 maybe_push_cleanup_level (type
);
4959 /* Handle initialization of references. DECL, TYPE, and INIT have the
4960 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4961 but will be set to a new CLEANUP_STMT if a temporary is created
4962 that must be destroyed subsequently.
4964 Returns an initializer expression to use to initialize DECL, or
4965 NULL if the initialization can be performed statically.
4967 Quotes on semantics can be found in ARM 8.4.3. */
4970 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4972 if (init
== NULL_TREE
)
4974 if ((DECL_LANG_SPECIFIC (decl
) == 0
4975 || DECL_IN_AGGR_P (decl
) == 0)
4976 && ! DECL_THIS_EXTERN (decl
))
4977 error ("%qD declared as reference but not initialized", decl
);
4981 if (TREE_CODE (init
) == TREE_LIST
)
4982 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4983 tf_warning_or_error
);
4985 tree ttype
= TREE_TYPE (type
);
4986 if (TREE_CODE (ttype
) != ARRAY_TYPE
4987 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4988 /* Note: default conversion is only called in very special cases. */
4989 init
= decay_conversion (init
, tf_warning_or_error
);
4991 /* check_initializer handles this for non-reference variables, but for
4992 references we need to do it here or the initializer will get the
4993 incomplete array type and confuse later calls to
4994 cp_complete_array_type. */
4995 if (TREE_CODE (ttype
) == ARRAY_TYPE
4996 && TYPE_DOMAIN (ttype
) == NULL_TREE
4997 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
4998 || TREE_CODE (init
) == STRING_CST
))
5000 cp_complete_array_type (&ttype
, init
, false);
5001 if (ttype
!= TREE_TYPE (type
))
5002 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5005 /* Convert INIT to the reference type TYPE. This may involve the
5006 creation of a temporary, whose lifetime must be the same as that
5007 of the reference. If so, a DECL_EXPR for the temporary will be
5008 added just after the DECL_EXPR for DECL. That's why we don't set
5009 DECL_INITIAL for local references (instead assigning to them
5010 explicitly); we need to allow the temporary to be initialized
5012 return initialize_reference (type
, init
, flags
,
5013 tf_warning_or_error
);
5016 /* Designated initializers in arrays are not supported in GNU C++.
5017 The parser cannot detect this error since it does not know whether
5018 a given brace-enclosed initializer is for a class type or for an
5019 array. This function checks that CE does not use a designated
5020 initializer. If it does, an error is issued. Returns true if CE
5021 is valid, i.e., does not have a designated initializer. */
5024 check_array_designated_initializer (constructor_elt
*ce
,
5025 unsigned HOST_WIDE_INT index
)
5027 /* Designated initializers for array elements are not supported. */
5030 /* The parser only allows identifiers as designated
5032 if (ce
->index
== error_mark_node
)
5034 error ("name used in a GNU-style designated "
5035 "initializer for an array");
5038 else if (identifier_p (ce
->index
))
5040 error ("name %qD used in a GNU-style designated "
5041 "initializer for an array", ce
->index
);
5045 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5048 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5049 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5052 /* A C99 designator is OK if it matches the current index. */
5053 if (wi::eq_p (ce_index
, index
))
5056 sorry ("non-trivial designated initializers not supported");
5059 error ("C99 designator %qE is not an integral constant-expression",
5068 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5069 array until we finish parsing the initializer. If that's the
5070 situation we're in, update DECL accordingly. */
5073 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5075 tree type
= TREE_TYPE (decl
);
5077 if (TREE_CODE (type
) == ARRAY_TYPE
5078 && TYPE_DOMAIN (type
) == NULL_TREE
5079 && TREE_CODE (decl
) != TYPE_DECL
)
5081 /* do_default is really a C-ism to deal with tentative definitions.
5082 But let's leave it here to ease the eventual merge. */
5083 int do_default
= !DECL_EXTERNAL (decl
);
5084 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5087 /* Check that there are no designated initializers in INIT, as
5088 those are not supported in GNU C++, and as the middle-end
5089 will crash if presented with a non-numeric designated
5091 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5093 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5094 constructor_elt
*ce
;
5096 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5097 if (!check_array_designated_initializer (ce
, i
))
5103 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5107 error ("initializer fails to determine size of %qD", decl
);
5109 else if (failure
== 2)
5113 error ("array size missing in %qD", decl
);
5115 /* If a `static' var's size isn't known, make it extern as
5116 well as static, so it does not get allocated. If it's not
5117 `static', then don't mark it extern; finish_incomplete_decl
5118 will give it a default size and it will get allocated. */
5119 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5120 DECL_EXTERNAL (decl
) = 1;
5122 else if (failure
== 3)
5124 error ("zero-size array %qD", decl
);
5128 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5130 relayout_decl (decl
);
5134 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5135 any appropriate error messages regarding the layout. */
5138 layout_var_decl (tree decl
)
5142 type
= TREE_TYPE (decl
);
5143 if (type
== error_mark_node
)
5146 /* If we haven't already laid out this declaration, do so now.
5147 Note that we must not call complete type for an external object
5148 because it's type might involve templates that we are not
5149 supposed to instantiate yet. (And it's perfectly valid to say
5150 `extern X x' for some incomplete type `X'.) */
5151 if (!DECL_EXTERNAL (decl
))
5152 complete_type (type
);
5153 if (!DECL_SIZE (decl
)
5154 && TREE_TYPE (decl
) != error_mark_node
5155 && (COMPLETE_TYPE_P (type
)
5156 || (TREE_CODE (type
) == ARRAY_TYPE
5157 && !TYPE_DOMAIN (type
)
5158 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5159 layout_decl (decl
, 0);
5161 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5163 /* An automatic variable with an incomplete type: that is an error.
5164 Don't talk about array types here, since we took care of that
5165 message in grokdeclarator. */
5166 error ("storage size of %qD isn%'t known", decl
);
5167 TREE_TYPE (decl
) = error_mark_node
;
5170 /* Keep this code around in case we later want to control debug info
5171 based on whether a type is "used". (jason 1999-11-11) */
5173 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5174 /* Let debugger know it should output info for this type. */
5175 note_debug_info_needed (ttype
);
5177 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5178 note_debug_info_needed (DECL_CONTEXT (decl
));
5181 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5182 && DECL_SIZE (decl
) != NULL_TREE
5183 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5185 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5186 constant_expression_warning (DECL_SIZE (decl
));
5189 error ("storage size of %qD isn%'t constant", decl
);
5190 TREE_TYPE (decl
) = error_mark_node
;
5195 /* If a local static variable is declared in an inline function, or if
5196 we have a weak definition, we must endeavor to create only one
5197 instance of the variable at link-time. */
5200 maybe_commonize_var (tree decl
)
5202 /* Static data in a function with comdat linkage also has comdat
5204 if (TREE_STATIC (decl
)
5205 /* Don't mess with __FUNCTION__. */
5206 && ! DECL_ARTIFICIAL (decl
)
5207 && DECL_FUNCTION_SCOPE_P (decl
)
5208 && vague_linkage_p (DECL_CONTEXT (decl
)))
5212 /* With weak symbols, we simply make the variable COMDAT;
5213 that will cause copies in multiple translations units to
5215 comdat_linkage (decl
);
5219 if (DECL_INITIAL (decl
) == NULL_TREE
5220 || DECL_INITIAL (decl
) == error_mark_node
)
5222 /* Without weak symbols, we can use COMMON to merge
5223 uninitialized variables. */
5224 TREE_PUBLIC (decl
) = 1;
5225 DECL_COMMON (decl
) = 1;
5229 /* While for initialized variables, we must use internal
5230 linkage -- which means that multiple copies will not
5232 TREE_PUBLIC (decl
) = 0;
5233 DECL_COMMON (decl
) = 0;
5234 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5235 "sorry: semantics of inline function static "
5236 "data %q#D are wrong (you%'ll wind up "
5237 "with multiple copies)", decl
))
5238 inform (DECL_SOURCE_LOCATION (decl
),
5239 "you can work around this by removing the initializer");
5245 /* Issue an error message if DECL is an uninitialized const variable. */
5248 check_for_uninitialized_const_var (tree decl
)
5250 tree type
= strip_array_types (TREE_TYPE (decl
));
5252 /* ``Unless explicitly declared extern, a const object does not have
5253 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5256 && TREE_CODE (type
) != REFERENCE_TYPE
5257 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5258 && !DECL_INITIAL (decl
))
5260 tree field
= default_init_uninitialized_part (type
);
5264 if (CP_TYPE_CONST_P (type
))
5265 permerror (DECL_SOURCE_LOCATION (decl
),
5266 "uninitialized const %qD", decl
);
5269 error_at (DECL_SOURCE_LOCATION (decl
),
5270 "uninitialized variable %qD in %<constexpr%> function",
5272 cp_function_chain
->invalid_constexpr
= true;
5275 if (CLASS_TYPE_P (type
))
5277 tree defaulted_ctor
;
5279 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5280 "%q#T has no user-provided default constructor", type
);
5281 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5283 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5284 "constructor is not user-provided because it is "
5285 "explicitly defaulted in the class body");
5286 inform (0, "and the implicitly-defined constructor does not "
5287 "initialize %q+#D", field
);
5292 /* Structure holding the current initializer being processed by reshape_init.
5293 CUR is a pointer to the current element being processed, END is a pointer
5294 after the last element present in the initializer. */
5295 typedef struct reshape_iterator_t
5297 constructor_elt
*cur
;
5298 constructor_elt
*end
;
5301 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5303 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5304 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5305 initialized. If there are no more such fields, the return value
5309 next_initializable_field (tree field
)
5312 && (TREE_CODE (field
) != FIELD_DECL
5313 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5314 || DECL_ARTIFICIAL (field
)))
5315 field
= DECL_CHAIN (field
);
5320 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5321 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5322 INTEGER_CST representing the size of the array minus one (the maximum index),
5323 or NULL_TREE if the array was declared without specifying the size. D is
5324 the iterator within the constructor. */
5327 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5328 tsubst_flags_t complain
)
5331 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5332 unsigned HOST_WIDE_INT max_index_cst
= 0;
5333 unsigned HOST_WIDE_INT index
;
5335 /* The initializer for an array is always a CONSTRUCTOR. */
5336 new_init
= build_constructor (init_list_type_node
, NULL
);
5340 /* Minus 1 is used for zero sized arrays. */
5341 if (integer_all_onesp (max_index
))
5344 if (tree_fits_uhwi_p (max_index
))
5345 max_index_cst
= tree_to_uhwi (max_index
);
5346 /* sizetype is sign extended, not zero extended. */
5348 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5351 /* Loop until there are no more initializers. */
5353 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5357 constructor_elt
*old_cur
= d
->cur
;
5359 check_array_designated_initializer (d
->cur
, index
);
5360 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5362 if (elt_init
== error_mark_node
)
5363 return error_mark_node
;
5364 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5365 size_int (index
), elt_init
);
5366 if (!TREE_CONSTANT (elt_init
))
5367 TREE_CONSTANT (new_init
) = false;
5369 /* This can happen with an invalid initializer (c++/54501). */
5370 if (d
->cur
== old_cur
&& !sized_array_p
)
5377 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5378 Parameters are the same of reshape_init_r. */
5381 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5383 tree max_index
= NULL_TREE
;
5385 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5387 if (TYPE_DOMAIN (type
))
5388 max_index
= array_type_nelts (type
);
5390 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5393 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5394 Parameters are the same of reshape_init_r. */
5397 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5399 tree max_index
= NULL_TREE
;
5401 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5403 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5405 tree value
= d
->cur
->value
;
5406 if (!same_type_p (TREE_TYPE (value
), type
))
5408 if (complain
& tf_error
)
5409 error ("invalid type %qT as initializer for a vector of type %qT",
5410 TREE_TYPE (d
->cur
->value
), type
);
5411 value
= error_mark_node
;
5417 /* For a vector, we initialize it as an array of the appropriate size. */
5418 if (TREE_CODE (type
) == VECTOR_TYPE
)
5419 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5421 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5424 /* Subroutine of reshape_init_r, processes the initializers for classes
5425 or union. Parameters are the same of reshape_init_r. */
5428 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5429 tsubst_flags_t complain
)
5434 gcc_assert (CLASS_TYPE_P (type
));
5436 /* The initializer for a class is always a CONSTRUCTOR. */
5437 new_init
= build_constructor (init_list_type_node
, NULL
);
5438 field
= next_initializable_field (TYPE_FIELDS (type
));
5444 An initializer for an aggregate member that is an
5445 empty class shall have the form of an empty
5446 initializer-list {}. */
5447 if (!first_initializer_p
)
5449 if (complain
& tf_error
)
5450 error ("initializer for %qT must be brace-enclosed", type
);
5451 return error_mark_node
;
5456 /* Loop through the initializable fields, gathering initializers. */
5457 while (d
->cur
!= d
->end
)
5460 constructor_elt
*old_cur
= d
->cur
;
5462 /* Handle designated initializers, as an extension. */
5465 if (d
->cur
->index
== error_mark_node
)
5466 return error_mark_node
;
5468 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5469 /* We already reshaped this. */
5470 gcc_assert (d
->cur
->index
== field
);
5471 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5472 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5475 if (complain
& tf_error
)
5476 error ("%<[%E] =%> used in a GNU-style designated initializer"
5477 " for class %qT", d
->cur
->index
, type
);
5478 return error_mark_node
;
5481 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5483 if (complain
& tf_error
)
5484 error ("%qT has no non-static data member named %qD", type
,
5486 return error_mark_node
;
5490 /* If we processed all the member of the class, we are done. */
5494 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5495 /*first_initializer_p=*/false, complain
);
5496 if (field_init
== error_mark_node
)
5497 return error_mark_node
;
5499 if (d
->cur
== old_cur
&& d
->cur
->index
)
5501 /* This can happen with an invalid initializer for a flexible
5502 array member (c++/54441). */
5503 if (complain
& tf_error
)
5504 error ("invalid initializer for %q#D", field
);
5505 return error_mark_node
;
5508 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5512 When a union is initialized with a brace-enclosed
5513 initializer, the braces shall only contain an
5514 initializer for the first member of the union. */
5515 if (TREE_CODE (type
) == UNION_TYPE
)
5518 field
= next_initializable_field (DECL_CHAIN (field
));
5524 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5525 designators are not valid; either complain or return true to indicate
5526 that reshape_init_r should return error_mark_node. */
5529 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5533 if (complain
& tf_error
)
5534 error ("C99 designator %qE outside aggregate initializer",
5542 /* Subroutine of reshape_init, which processes a single initializer (part of
5543 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5544 iterator within the CONSTRUCTOR which points to the initializer to process.
5545 FIRST_INITIALIZER_P is true if this is the first initializer of the
5546 outermost CONSTRUCTOR node. */
5549 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5550 tsubst_flags_t complain
)
5552 tree init
= d
->cur
->value
;
5554 if (error_operand_p (init
))
5555 return error_mark_node
;
5557 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5558 && has_designator_problem (d
, complain
))
5559 return error_mark_node
;
5561 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5563 /* A complex type can be initialized from one or two initializers,
5564 but braces are not elided. */
5566 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5568 if (CONSTRUCTOR_NELTS (init
) > 2)
5570 if (complain
& tf_error
)
5571 error ("too many initializers for %qT", type
);
5573 return error_mark_node
;
5576 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5578 vec
<constructor_elt
, va_gc
> *v
= 0;
5579 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5580 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5581 if (has_designator_problem (d
, complain
))
5582 return error_mark_node
;
5584 init
= build_constructor (init_list_type_node
, v
);
5589 /* A non-aggregate type is always initialized with a single
5591 if (!CP_AGGREGATE_TYPE_P (type
))
5593 /* It is invalid to initialize a non-aggregate type with a
5594 brace-enclosed initializer before C++0x.
5595 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5596 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5597 a CONSTRUCTOR (with a record type). */
5598 if (TREE_CODE (init
) == CONSTRUCTOR
5599 /* Don't complain about a capture-init. */
5600 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5601 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5603 if (SCALAR_TYPE_P (type
))
5605 if (cxx_dialect
< cxx11
5606 /* Isn't value-initialization. */
5607 || CONSTRUCTOR_NELTS (init
) > 0)
5609 if (complain
& tf_error
)
5610 error ("braces around scalar initializer for type %qT",
5612 init
= error_mark_node
;
5616 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5623 /* "If T is a class type and the initializer list has a single element of
5624 type cv U, where U is T or a class derived from T, the object is
5625 initialized from that element." Even if T is an aggregate. */
5626 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5627 && first_initializer_p
5628 && d
->end
- d
->cur
== 1
5629 && reference_related_p (type
, TREE_TYPE (init
)))
5637 All implicit type conversions (clause _conv_) are considered when
5638 initializing the aggregate member with an initializer from an
5639 initializer-list. If the initializer can initialize a member,
5640 the member is initialized. Otherwise, if the member is itself a
5641 non-empty subaggregate, brace elision is assumed and the
5642 initializer is considered for the initialization of the first
5643 member of the subaggregate. */
5644 if (TREE_CODE (init
) != CONSTRUCTOR
5645 /* But don't try this for the first initializer, since that would be
5646 looking through the outermost braces; A a2 = { a1 }; is not a
5647 valid aggregate initialization. */
5648 && !first_initializer_p
5649 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5650 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5657 /* [dcl.init.string]
5659 A char array (whether plain char, signed char, or unsigned char)
5660 can be initialized by a string-literal (optionally enclosed in
5661 braces); a wchar_t array can be initialized by a wide
5662 string-literal (optionally enclosed in braces). */
5663 if (TREE_CODE (type
) == ARRAY_TYPE
5664 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5666 tree str_init
= init
;
5668 /* Strip one level of braces if and only if they enclose a single
5669 element (as allowed by [dcl.init.string]). */
5670 if (!first_initializer_p
5671 && TREE_CODE (str_init
) == CONSTRUCTOR
5672 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5674 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5677 /* If it's a string literal, then it's the initializer for the array
5678 as a whole. Otherwise, continue with normal initialization for
5679 array types (one value per array element). */
5680 if (TREE_CODE (str_init
) == STRING_CST
)
5682 if (has_designator_problem (d
, complain
))
5683 return error_mark_node
;
5689 /* The following cases are about aggregates. If we are not within a full
5690 initializer already, and there is not a CONSTRUCTOR, it means that there
5691 is a missing set of braces (that is, we are processing the case for
5692 which reshape_init exists). */
5693 if (!first_initializer_p
)
5695 if (TREE_CODE (init
) == CONSTRUCTOR
)
5697 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5698 /* There is no need to reshape pointer-to-member function
5699 initializers, as they are always constructed correctly
5700 by the front end. */
5702 else if (COMPOUND_LITERAL_P (init
))
5703 /* For a nested compound literal, there is no need to reshape since
5704 brace elision is not allowed. Even if we decided to allow it,
5705 we should add a call to reshape_init in finish_compound_literal,
5706 before calling digest_init, so changing this code would still
5707 not be necessary. */
5708 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5712 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5713 return reshape_init (type
, init
, complain
);
5717 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5721 /* Dispatch to specialized routines. */
5722 if (CLASS_TYPE_P (type
))
5723 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5724 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5725 return reshape_init_array (type
, d
, complain
);
5726 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5727 return reshape_init_vector (type
, d
, complain
);
5732 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5733 brace-enclosed aggregate initializer.
5735 INIT is the CONSTRUCTOR containing the list of initializers describing
5736 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5737 It may not presently match the shape of the TYPE; for example:
5739 struct S { int a; int b; };
5740 struct S a[] = { 1, 2, 3, 4 };
5742 Here INIT will hold a vector of four elements, rather than a
5743 vector of two elements, each itself a vector of two elements. This
5744 routine transforms INIT from the former form into the latter. The
5745 revised CONSTRUCTOR node is returned. */
5748 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5750 vec
<constructor_elt
, va_gc
> *v
;
5754 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5756 v
= CONSTRUCTOR_ELTS (init
);
5758 /* An empty constructor does not need reshaping, and it is always a valid
5760 if (vec_safe_is_empty (v
))
5763 /* Recurse on this CONSTRUCTOR. */
5765 d
.end
= d
.cur
+ v
->length ();
5767 new_init
= reshape_init_r (type
, &d
, true, complain
);
5768 if (new_init
== error_mark_node
)
5769 return error_mark_node
;
5771 /* Make sure all the element of the constructor were used. Otherwise,
5772 issue an error about exceeding initializers. */
5775 if (complain
& tf_error
)
5776 error ("too many initializers for %qT", type
);
5778 return error_mark_node
;
5784 /* Verify array initializer. Returns true if errors have been reported. */
5787 check_array_initializer (tree decl
, tree type
, tree init
)
5789 tree element_type
= TREE_TYPE (type
);
5791 /* The array type itself need not be complete, because the
5792 initializer may tell us how many elements are in the array.
5793 But, the elements of the array must be complete. */
5794 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5797 error ("elements of array %q#D have incomplete type", decl
);
5799 error ("elements of array %q#T have incomplete type", type
);
5802 /* A compound literal can't have variable size. */
5804 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5805 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5807 error ("variable-sized compound literal");
5813 /* Subroutine of check_initializer; args are passed down from that function.
5814 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5817 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5820 gcc_assert (stmts_are_full_exprs_p ());
5821 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5824 /* Verify INIT (the initializer for DECL), and record the
5825 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5826 grok_reference_init.
5828 If the return value is non-NULL, it is an expression that must be
5829 evaluated dynamically to initialize DECL. */
5832 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5834 tree type
= TREE_TYPE (decl
);
5835 tree init_code
= NULL
;
5838 /* Things that are going to be initialized need to have complete
5840 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5842 if (DECL_HAS_VALUE_EXPR_P (decl
))
5844 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5845 it doesn't have storage to be initialized. */
5846 gcc_assert (init
== NULL_TREE
);
5850 if (type
== error_mark_node
)
5851 /* We will have already complained. */
5854 if (TREE_CODE (type
) == ARRAY_TYPE
)
5856 if (check_array_initializer (decl
, type
, init
))
5859 else if (!COMPLETE_TYPE_P (type
))
5861 error ("%q#D has incomplete type", decl
);
5862 TREE_TYPE (decl
) = error_mark_node
;
5866 /* There is no way to make a variable-sized class type in GNU C++. */
5867 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5869 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5871 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5872 if (SCALAR_TYPE_P (type
))
5876 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5877 init
= build_zero_init (type
, NULL_TREE
, false);
5879 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5881 error ("scalar object %qD requires one element in initializer",
5883 TREE_TYPE (decl
) = error_mark_node
;
5889 if (TREE_CODE (decl
) == CONST_DECL
)
5891 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5893 DECL_INITIAL (decl
) = init
;
5895 gcc_assert (init
!= NULL_TREE
);
5898 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5900 else if (init
|| type_build_ctor_call (type
)
5901 || TREE_CODE (type
) == REFERENCE_TYPE
)
5903 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5905 init
= grok_reference_init (decl
, type
, init
, flags
);
5906 flags
|= LOOKUP_ALREADY_DIGESTED
;
5909 check_for_uninitialized_const_var (decl
);
5910 /* Do not reshape constructors of vectors (they don't need to be
5912 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5914 if (is_std_init_list (type
))
5916 init
= perform_implicit_conversion (type
, init
,
5917 tf_warning_or_error
);
5918 flags
|= LOOKUP_ALREADY_DIGESTED
;
5920 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5922 /* Don't reshape if the class has constructors. */
5923 if (cxx_dialect
== cxx98
)
5924 error ("in C++98 %qD must be initialized by constructor, "
5928 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5930 error ("opaque vector types cannot be initialized");
5931 init
= error_mark_node
;
5935 init
= reshape_init (type
, init
, tf_warning_or_error
);
5936 flags
|= LOOKUP_NO_NARROWING
;
5939 else if (TREE_CODE (init
) == TREE_LIST
5940 && TREE_TYPE (init
) != unknown_type_node
5941 && !MAYBE_CLASS_TYPE_P (type
))
5943 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5945 /* We get here with code like `int a (2);' */
5946 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5947 tf_warning_or_error
);
5950 /* If DECL has an array type without a specific bound, deduce the
5951 array size from the initializer. */
5952 maybe_deduce_size_from_array_init (decl
, init
);
5953 type
= TREE_TYPE (decl
);
5954 if (type
== error_mark_node
)
5957 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5958 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5959 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5960 && CP_AGGREGATE_TYPE_P (type
)
5961 && (CLASS_TYPE_P (type
)
5962 || !TYPE_NEEDS_CONSTRUCTING (type
)
5963 || type_has_extended_temps (type
))))
5965 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5967 /* A constructor call is a non-trivial initializer even if
5968 it isn't explicitly written. */
5969 if (TREE_SIDE_EFFECTS (init_code
))
5970 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5972 /* If this is a constexpr initializer, expand_default_init will
5973 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5974 case, pull the initializer back out and pass it down into
5975 store_init_value. */
5976 while (TREE_CODE (init_code
) == EXPR_STMT
5977 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5978 init_code
= TREE_OPERAND (init_code
, 0);
5979 if (TREE_CODE (init_code
) == INIT_EXPR
)
5981 init
= TREE_OPERAND (init_code
, 1);
5982 init_code
= NULL_TREE
;
5983 /* Don't call digest_init; it's unnecessary and will complain
5984 about aggregate initialization of non-aggregate classes. */
5985 flags
|= LOOKUP_ALREADY_DIGESTED
;
5987 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5989 /* Declared constexpr, but no suitable initializer; massage
5990 init appropriately so we can pass it into store_init_value
5992 if (CLASS_TYPE_P (type
)
5993 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5995 init
= build_functional_cast (type
, init
, tf_none
);
5996 if (TREE_CODE (init
) == TARGET_EXPR
)
5997 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5999 init_code
= NULL_TREE
;
6005 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6007 /* In aggregate initialization of a variable, each element
6008 initialization is a full-expression because there is no
6009 enclosing expression. */
6010 gcc_assert (stmts_are_full_exprs_p ());
6012 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6014 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6015 && DECL_INITIAL (decl
)
6016 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6017 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6018 warning (0, "array %qD initialized by parenthesized string literal %qE",
6019 decl
, DECL_INITIAL (decl
));
6025 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6026 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6027 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6028 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6031 check_for_uninitialized_const_var (decl
);
6034 if (init
&& init
!= error_mark_node
)
6035 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6039 /* We might have set these in cp_finish_decl. */
6040 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6041 TREE_CONSTANT (decl
) = false;
6044 if (init_code
&& DECL_IN_AGGR_P (decl
))
6046 static int explained
= 0;
6048 if (cxx_dialect
< cxx11
)
6049 error ("initializer invalid for static member with constructor");
6051 error ("non-constant in-class initialization invalid for static "
6052 "member %qD", decl
);
6055 inform (input_location
,
6056 "(an out of class initialization is required)");
6065 /* If DECL is not a local variable, give it RTL. */
6068 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6070 int toplev
= toplevel_bindings_p ();
6073 /* Set the DECL_ASSEMBLER_NAME for the object. */
6076 /* The `register' keyword, when used together with an
6077 asm-specification, indicates that the variable should be
6078 placed in a particular register. */
6079 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6081 set_user_assembler_name (decl
, asmspec
);
6082 DECL_HARD_REGISTER (decl
) = 1;
6086 if (TREE_CODE (decl
) == FUNCTION_DECL
6087 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6088 set_builtin_user_assembler_name (decl
, asmspec
);
6089 set_user_assembler_name (decl
, asmspec
);
6093 /* Handle non-variables up front. */
6096 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6100 /* If we see a class member here, it should be a static data
6102 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6104 gcc_assert (TREE_STATIC (decl
));
6105 /* An in-class declaration of a static data member should be
6106 external; it is only a declaration, and not a definition. */
6107 if (init
== NULL_TREE
)
6108 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6111 /* We don't create any RTL for local variables. */
6112 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6115 /* We defer emission of local statics until the corresponding
6116 DECL_EXPR is expanded. */
6117 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6119 /* Defer template instantiations. */
6120 if (DECL_LANG_SPECIFIC (decl
)
6121 && DECL_IMPLICIT_INSTANTIATION (decl
))
6124 /* If we're not deferring, go ahead and assemble the variable. */
6126 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6129 /* walk_tree helper for wrap_temporary_cleanups, below. */
6132 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6134 /* Stop at types or full-expression boundaries. */
6135 if (TYPE_P (*stmt_p
)
6136 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6142 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6144 tree guard
= (tree
)data
;
6145 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6147 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6148 /* Tell honor_protect_cleanup_actions to handle this as a separate
6150 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6152 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6158 /* We're initializing a local variable which has a cleanup GUARD. If there
6159 are any temporaries used in the initializer INIT of this variable, we
6160 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6161 variable will be cleaned up properly if one of them throws.
6163 Unfortunately, there's no way to express this properly in terms of
6164 nesting, as the regions for the temporaries overlap the region for the
6165 variable itself; if there are two temporaries, the variable needs to be
6166 the first thing destroyed if either of them throws. However, we only
6167 want to run the variable's cleanup if it actually got constructed. So
6168 we need to guard the temporary cleanups with the variable's cleanup if
6169 they are run on the normal path, but not if they are run on the
6170 exceptional path. We implement this by telling
6171 honor_protect_cleanup_actions to strip the variable cleanup from the
6172 exceptional path. */
6175 wrap_temporary_cleanups (tree init
, tree guard
)
6177 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6180 /* Generate code to initialize DECL (a local variable). */
6183 initialize_local_var (tree decl
, tree init
)
6185 tree type
= TREE_TYPE (decl
);
6189 gcc_assert (VAR_P (decl
)
6190 || TREE_CODE (decl
) == RESULT_DECL
);
6191 gcc_assert (!TREE_STATIC (decl
));
6193 if (DECL_SIZE (decl
) == NULL_TREE
)
6195 /* If we used it already as memory, it must stay in memory. */
6196 DECL_INITIAL (decl
) = NULL_TREE
;
6197 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6201 if (type
== error_mark_node
)
6204 /* Compute and store the initial value. */
6205 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6206 if (TREE_USED (type
))
6207 DECL_READ_P (decl
) = 1;
6209 /* Generate a cleanup, if necessary. */
6210 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6212 /* Perform the initialization. */
6215 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6216 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6217 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6219 /* Stick simple initializers in DECL_INITIAL so that
6220 -Wno-init-self works (c++/34772). */
6221 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6222 DECL_INITIAL (decl
) = rinit
;
6224 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6228 warning_at (DECL_SOURCE_LOCATION (decl
),
6230 "reference %qD is initialized with itself", decl
);
6235 int saved_stmts_are_full_exprs_p
;
6237 /* If we're only initializing a single object, guard the
6238 destructors of any temporaries used in its initializer with
6239 its destructor. This isn't right for arrays because each
6240 element initialization is a full-expression. */
6241 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6242 wrap_temporary_cleanups (init
, cleanup
);
6244 gcc_assert (building_stmt_list_p ());
6245 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6246 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6247 finish_expr_stmt (init
);
6248 current_stmt_tree ()->stmts_are_full_exprs_p
=
6249 saved_stmts_are_full_exprs_p
;
6253 /* Set this to 0 so we can tell whether an aggregate which was
6254 initialized was ever used. Don't do this if it has a
6255 destructor, so we don't complain about the 'resource
6256 allocation is initialization' idiom. Now set
6257 attribute((unused)) on types so decls of that type will be
6258 marked used. (see TREE_USED, above.) */
6259 if (TYPE_NEEDS_CONSTRUCTING (type
)
6261 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6262 && DECL_NAME (decl
))
6263 TREE_USED (decl
) = 0;
6264 else if (already_used
)
6265 TREE_USED (decl
) = 1;
6268 finish_decl_cleanup (decl
, cleanup
);
6271 /* DECL is a VAR_DECL for a compiler-generated variable with static
6272 storage duration (like a virtual table) whose initializer is a
6273 compile-time constant. Initialize the variable and provide it to the
6277 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6280 gcc_assert (DECL_ARTIFICIAL (decl
));
6281 init
= build_constructor (TREE_TYPE (decl
), v
);
6282 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6283 DECL_INITIAL (decl
) = init
;
6284 DECL_INITIALIZED_P (decl
) = 1;
6285 determine_visibility (decl
);
6286 layout_var_decl (decl
);
6287 maybe_commonize_var (decl
);
6288 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6291 /* INIT is the initializer for a variable, as represented by the
6292 parser. Returns true iff INIT is type-dependent. */
6295 type_dependent_init_p (tree init
)
6297 if (TREE_CODE (init
) == TREE_LIST
)
6298 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6299 return any_type_dependent_elements_p (init
);
6300 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6301 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6303 vec
<constructor_elt
, va_gc
> *elts
;
6307 elts
= CONSTRUCTOR_ELTS (init
);
6308 nelts
= vec_safe_length (elts
);
6309 for (i
= 0; i
< nelts
; ++i
)
6310 if (type_dependent_init_p ((*elts
)[i
].value
))
6314 /* It must be a simple expression, e.g., int i = 3; */
6315 return type_dependent_expression_p (init
);
6320 /* INIT is the initializer for a variable, as represented by the
6321 parser. Returns true iff INIT is value-dependent. */
6324 value_dependent_init_p (tree init
)
6326 if (TREE_CODE (init
) == TREE_LIST
)
6327 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6328 return any_value_dependent_elements_p (init
);
6329 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6330 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6332 vec
<constructor_elt
, va_gc
> *elts
;
6336 elts
= CONSTRUCTOR_ELTS (init
);
6337 nelts
= vec_safe_length (elts
);
6338 for (i
= 0; i
< nelts
; ++i
)
6339 if (value_dependent_init_p ((*elts
)[i
].value
))
6343 /* It must be a simple expression, e.g., int i = 3; */
6344 return value_dependent_expression_p (init
);
6349 /* Finish processing of a declaration;
6350 install its line number and initial value.
6351 If the length of an array type is not known before,
6352 it must be determined now, from the initial value, or it is an error.
6354 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6355 true, then INIT is an integral constant expression.
6357 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6358 if the (init) syntax was used. */
6361 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6362 tree asmspec_tree
, int flags
)
6365 vec
<tree
, va_gc
> *cleanups
= NULL
;
6366 const char *asmspec
= NULL
;
6367 int was_readonly
= 0;
6368 bool var_definition_p
= false;
6371 if (decl
== error_mark_node
)
6376 error ("assignment (not initialization) in declaration");
6380 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6381 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6382 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6384 type
= TREE_TYPE (decl
);
6385 if (type
== error_mark_node
)
6388 /* If a name was specified, get the string. */
6389 if (at_namespace_scope_p ())
6390 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6391 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6392 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6394 if (current_class_type
6395 && CP_DECL_CONTEXT (decl
) == current_class_type
6396 && TYPE_BEING_DEFINED (current_class_type
)
6397 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6398 && (DECL_INITIAL (decl
) || init
))
6399 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6401 if (TREE_CODE (decl
) != FUNCTION_DECL
6402 && (auto_node
= type_uses_auto (type
)))
6405 if (init
== NULL_TREE
)
6407 if (DECL_LANG_SPECIFIC (decl
)
6408 && DECL_TEMPLATE_INSTANTIATION (decl
)
6409 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6411 /* init is null because we're deferring instantiating the
6412 initializer until we need it. Well, we need it now. */
6413 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6417 error ("declaration of %q#D has no initializer", decl
);
6418 TREE_TYPE (decl
) = error_mark_node
;
6422 if (TREE_CODE (d_init
) == TREE_LIST
)
6423 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6424 tf_warning_or_error
);
6425 d_init
= resolve_nondeduced_context (d_init
);
6426 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6428 if (type
== error_mark_node
)
6430 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6433 if (!ensure_literal_type_for_constexpr_object (decl
))
6434 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6437 && DECL_CLASS_SCOPE_P (decl
)
6438 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6439 check_static_variable_definition (decl
, type
);
6441 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6444 if (init
== ridpointers
[(int)RID_DELETE
])
6446 /* FIXME check this is 1st decl. */
6447 DECL_DELETED_FN (decl
) = 1;
6448 DECL_DECLARED_INLINE_P (decl
) = 1;
6449 DECL_INITIAL (decl
) = error_mark_node
;
6450 FOR_EACH_CLONE (clone
, decl
)
6452 DECL_DELETED_FN (clone
) = 1;
6453 DECL_DECLARED_INLINE_P (clone
) = 1;
6454 DECL_INITIAL (clone
) = error_mark_node
;
6458 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6460 if (defaultable_fn_check (decl
))
6461 DECL_DEFAULTED_FN (decl
) = 1;
6463 DECL_INITIAL (decl
) = NULL_TREE
;
6467 if (init
&& VAR_P (decl
))
6469 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6470 /* If DECL is a reference, then we want to know whether init is a
6471 reference constant; init_const_expr_p as passed tells us whether
6472 it's an rvalue constant. */
6473 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6474 init_const_expr_p
= potential_constant_expression (init
);
6475 if (init_const_expr_p
)
6477 /* Set these flags now for templates. We'll update the flags in
6478 store_init_value for instantiations. */
6479 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6480 if (decl_maybe_constant_var_p (decl
))
6481 TREE_CONSTANT (decl
) = 1;
6485 if (processing_template_decl
)
6487 bool type_dependent_p
;
6489 /* Add this declaration to the statement-tree. */
6490 if (at_function_scope_p ())
6491 add_decl_expr (decl
);
6493 type_dependent_p
= dependent_type_p (type
);
6495 if (check_for_bare_parameter_packs (init
))
6498 DECL_INITIAL (decl
) = NULL_TREE
;
6501 /* Generally, initializers in templates are expanded when the
6502 template is instantiated. But, if DECL is a variable constant
6503 then it can be used in future constant expressions, so its value
6504 must be available. */
6506 if (!VAR_P (decl
) || dependent_type_p (type
))
6507 /* We can't do anything if the decl has dependent type. */;
6509 && init_const_expr_p
6510 && !type_dependent_p
6511 && TREE_CODE (type
) != REFERENCE_TYPE
6512 && decl_maybe_constant_var_p (decl
)
6513 && !type_dependent_init_p (init
)
6514 && !value_dependent_init_p (init
))
6516 /* This variable seems to be a non-dependent constant, so process
6517 its initializer. If check_initializer returns non-null the
6518 initialization wasn't constant after all. */
6520 cleanups
= make_tree_vector ();
6521 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6522 if (init_code
== NULL_TREE
)
6524 release_tree_vector (cleanups
);
6526 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6528 /* Deduce array size even if the initializer is dependent. */
6529 maybe_deduce_size_from_array_init (decl
, init
);
6530 /* And complain about multiple initializers. */
6531 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6532 && !MAYBE_CLASS_TYPE_P (type
))
6533 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6534 tf_warning_or_error
);
6538 DECL_INITIAL (decl
) = init
;
6542 /* Just store non-static data member initializers for later. */
6543 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6544 DECL_INITIAL (decl
) = init
;
6546 /* Take care of TYPE_DECLs up front. */
6547 if (TREE_CODE (decl
) == TYPE_DECL
)
6549 if (type
!= error_mark_node
6550 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6552 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6553 warning (0, "shadowing previous type declaration of %q#D", decl
);
6554 set_identifier_type_value (DECL_NAME (decl
), decl
);
6557 /* If we have installed this as the canonical typedef for this
6558 type, and that type has not been defined yet, delay emitting
6559 the debug information for it, as we will emit it later. */
6560 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6561 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6562 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6564 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6569 /* A reference will be modified here, as it is initialized. */
6570 if (! DECL_EXTERNAL (decl
)
6571 && TREE_READONLY (decl
)
6572 && TREE_CODE (type
) == REFERENCE_TYPE
)
6575 TREE_READONLY (decl
) = 0;
6580 /* If this is a local variable that will need a mangled name,
6581 register it now. We must do this before processing the
6582 initializer for the variable, since the initialization might
6583 require a guard variable, and since the mangled name of the
6584 guard variable will depend on the mangled name of this
6586 if (DECL_FUNCTION_SCOPE_P (decl
)
6587 && TREE_STATIC (decl
)
6588 && !DECL_ARTIFICIAL (decl
))
6590 push_local_name (decl
);
6591 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6592 || DECL_DESTRUCTOR_P (current_function_decl
))
6593 /* Normally local_decls is populated during GIMPLE lowering,
6594 but [cd]tors are never actually compiled directly. We need
6595 to put statics on the list so we can deal with the label
6596 address extension. FIXME. */
6597 add_local_decl (cfun
, decl
);
6600 /* Convert the initializer to the type of DECL, if we have not
6601 already initialized DECL. */
6602 if (!DECL_INITIALIZED_P (decl
)
6603 /* If !DECL_EXTERNAL then DECL is being defined. In the
6604 case of a static data member initialized inside the
6605 class-specifier, there can be an initializer even if DECL
6606 is *not* defined. */
6607 && (!DECL_EXTERNAL (decl
) || init
))
6609 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6612 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6613 /* Allow libjava/prims.cc define primitive classes. */
6614 if (init
!= NULL_TREE
6615 || jclass
== NULL_TREE
6616 || TREE_CODE (jclass
) != TYPE_DECL
6617 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6618 || !same_type_ignoring_top_level_qualifiers_p
6619 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6620 error ("Java object %qD not allocated with %<new%>", decl
);
6623 cleanups
= make_tree_vector ();
6624 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6630 The memory occupied by any object of static storage
6631 duration is zero-initialized at program startup before
6632 any other initialization takes place.
6634 We cannot create an appropriate initializer until after
6635 the type of DECL is finalized. If DECL_INITIAL is set,
6636 then the DECL is statically initialized, and any
6637 necessary zero-initialization has already been performed. */
6638 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6639 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6640 /*nelts=*/NULL_TREE
,
6641 /*static_storage_p=*/true);
6642 /* Remember that the initialization for this variable has
6644 DECL_INITIALIZED_P (decl
) = 1;
6645 /* This declaration is the definition of this variable,
6646 unless we are initializing a static data member within
6647 the class specifier. */
6648 if (!DECL_EXTERNAL (decl
))
6649 var_definition_p
= true;
6651 /* If the variable has an array type, lay out the type, even if
6652 there is no initializer. It is valid to index through the
6653 array, and we must get TYPE_ALIGN set correctly on the array
6655 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6658 if (TREE_STATIC (decl
)
6659 && !at_function_scope_p ()
6660 && current_function_decl
== NULL
)
6661 /* So decl is a global variable or a static member of a
6662 non local class. Record the types it uses
6663 so that we can decide later to emit debug info for them. */
6664 record_types_used_by_current_var_decl (decl
);
6666 else if (TREE_CODE (decl
) == FIELD_DECL
6667 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6668 error ("non-static data member %qD has Java class type", decl
);
6670 /* Add this declaration to the statement-tree. This needs to happen
6671 after the call to check_initializer so that the DECL_EXPR for a
6672 reference temp is added before the DECL_EXPR for the reference itself. */
6673 if (DECL_FUNCTION_SCOPE_P (decl
))
6675 /* If we're building a variable sized type, and we might be
6676 reachable other than via the top of the current binding
6677 level, then create a new BIND_EXPR so that we deallocate
6678 the object at the right time. */
6681 && !TREE_CONSTANT (DECL_SIZE (decl
))
6682 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6685 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6686 TREE_SIDE_EFFECTS (bind
) = 1;
6688 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6690 add_decl_expr (decl
);
6693 /* Let the middle end know about variables and functions -- but not
6694 static data members in uninstantiated class templates. */
6695 if (VAR_OR_FUNCTION_DECL_P (decl
))
6699 layout_var_decl (decl
);
6700 maybe_commonize_var (decl
);
6703 /* This needs to happen after the linkage is set. */
6704 determine_visibility (decl
);
6706 if (var_definition_p
&& TREE_STATIC (decl
))
6708 /* If a TREE_READONLY variable needs initialization
6709 at runtime, it is no longer readonly and we need to
6710 avoid MEM_READONLY_P being set on RTL created for it. */
6713 if (TREE_READONLY (decl
))
6714 TREE_READONLY (decl
) = 0;
6717 else if (was_readonly
)
6718 TREE_READONLY (decl
) = 1;
6720 /* Likewise if it needs destruction. */
6721 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6722 TREE_READONLY (decl
) = 0;
6725 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6727 /* Check for abstractness of the type. Notice that there is no
6728 need to strip array types here since the check for those types
6729 is already done within create_array_type_for_decl. */
6730 abstract_virtuals_error (decl
, type
);
6732 if (TREE_TYPE (decl
) == error_mark_node
)
6733 /* No initialization required. */
6735 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6739 if (init
== ridpointers
[(int)RID_DEFAULT
])
6741 /* An out-of-class default definition is defined at
6742 the point where it is explicitly defaulted. */
6743 if (DECL_DELETED_FN (decl
))
6744 maybe_explain_implicit_delete (decl
);
6745 else if (DECL_INITIAL (decl
) == error_mark_node
)
6746 synthesize_method (decl
);
6749 error ("function %q#D is initialized like a variable", decl
);
6751 /* else no initialization required. */
6753 else if (DECL_EXTERNAL (decl
)
6754 && ! (DECL_LANG_SPECIFIC (decl
)
6755 && DECL_NOT_REALLY_EXTERN (decl
)))
6758 DECL_INITIAL (decl
) = init
;
6760 /* A variable definition. */
6761 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6762 /* Initialize the local variable. */
6763 initialize_local_var (decl
, init
);
6765 /* If a variable is defined, and then a subsequent
6766 definition with external linkage is encountered, we will
6767 get here twice for the same variable. We want to avoid
6768 calling expand_static_init more than once. For variables
6769 that are not static data members, we can call
6770 expand_static_init only when we actually process the
6771 initializer. It is not legal to redeclare a static data
6772 member, so this issue does not arise in that case. */
6773 else if (var_definition_p
&& TREE_STATIC (decl
))
6774 expand_static_init (decl
, init
);
6777 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6778 reference, insert it in the statement-tree now. */
6782 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6783 push_cleanup (decl
, t
, false);
6784 release_tree_vector (cleanups
);
6788 TREE_READONLY (decl
) = 1;
6790 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6793 /* Returns a declaration for a VAR_DECL as if:
6795 extern "C" TYPE NAME;
6797 had been seen. Used to create compiler-generated global
6801 declare_global_var (tree name
, tree type
)
6805 push_to_top_level ();
6806 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6807 TREE_PUBLIC (decl
) = 1;
6808 DECL_EXTERNAL (decl
) = 1;
6809 DECL_ARTIFICIAL (decl
) = 1;
6810 /* If the user has explicitly declared this variable (perhaps
6811 because the code we are compiling is part of a low-level runtime
6812 library), then it is possible that our declaration will be merged
6813 with theirs by pushdecl. */
6814 decl
= pushdecl (decl
);
6815 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6816 pop_from_top_level ();
6821 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6822 if "__cxa_atexit" is not being used) corresponding to the function
6823 to be called when the program exits. */
6826 get_atexit_fn_ptr_type (void)
6830 if (!atexit_fn_ptr_type_node
)
6833 if (flag_use_cxa_atexit
6834 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6835 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6836 arg_type
= ptr_type_node
;
6838 /* The parameter to "atexit" is "void (*)(void)". */
6839 arg_type
= NULL_TREE
;
6841 fn_type
= build_function_type_list (void_type_node
,
6842 arg_type
, NULL_TREE
);
6843 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6846 return atexit_fn_ptr_type_node
;
6849 /* Returns a pointer to the `atexit' function. Note that if
6850 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6851 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6854 get_atexit_node (void)
6860 bool use_aeabi_atexit
;
6865 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6867 /* The declaration for `__cxa_atexit' is:
6869 int __cxa_atexit (void (*)(void *), void *, void *)
6871 We build up the argument types and then the function type
6873 tree argtype0
, argtype1
, argtype2
;
6875 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6876 /* First, build the pointer-to-function type for the first
6878 fn_ptr_type
= get_atexit_fn_ptr_type ();
6879 /* Then, build the rest of the argument types. */
6880 argtype2
= ptr_type_node
;
6881 if (use_aeabi_atexit
)
6883 argtype1
= fn_ptr_type
;
6884 argtype0
= ptr_type_node
;
6888 argtype1
= ptr_type_node
;
6889 argtype0
= fn_ptr_type
;
6891 /* And the final __cxa_atexit type. */
6892 fn_type
= build_function_type_list (integer_type_node
,
6893 argtype0
, argtype1
, argtype2
,
6895 if (use_aeabi_atexit
)
6896 name
= "__aeabi_atexit";
6898 name
= "__cxa_atexit";
6902 /* The declaration for `atexit' is:
6904 int atexit (void (*)());
6906 We build up the argument types and then the function type
6908 fn_ptr_type
= get_atexit_fn_ptr_type ();
6909 /* Build the final atexit type. */
6910 fn_type
= build_function_type_list (integer_type_node
,
6911 fn_ptr_type
, NULL_TREE
);
6915 /* Now, build the function declaration. */
6916 push_lang_context (lang_name_c
);
6917 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6918 mark_used (atexit_fndecl
);
6919 pop_lang_context ();
6920 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6925 /* Like get_atexit_node, but for thread-local cleanups. */
6928 get_thread_atexit_node (void)
6930 /* The declaration for `__cxa_thread_atexit' is:
6932 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6933 tree fn_type
= build_function_type_list (integer_type_node
,
6934 get_atexit_fn_ptr_type (),
6935 ptr_type_node
, ptr_type_node
,
6938 /* Now, build the function declaration. */
6939 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6940 ECF_LEAF
| ECF_NOTHROW
);
6941 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6944 /* Returns the __dso_handle VAR_DECL. */
6947 get_dso_handle_node (void)
6949 if (dso_handle_node
)
6950 return dso_handle_node
;
6952 /* Declare the variable. */
6953 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6956 #ifdef HAVE_GAS_HIDDEN
6957 if (dso_handle_node
!= error_mark_node
)
6959 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6960 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6964 return dso_handle_node
;
6967 /* Begin a new function with internal linkage whose job will be simply
6968 to destroy some particular variable. */
6970 static GTY(()) int start_cleanup_cnt
;
6973 start_cleanup_fn (void)
6978 bool use_cxa_atexit
= flag_use_cxa_atexit
6979 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6981 push_to_top_level ();
6983 /* No need to mangle this. */
6984 push_lang_context (lang_name_c
);
6986 /* Build the name of the function. */
6987 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6988 /* Build the function declaration. */
6989 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6990 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6991 /* It's a function with internal linkage, generated by the
6993 TREE_PUBLIC (fndecl
) = 0;
6994 DECL_ARTIFICIAL (fndecl
) = 1;
6995 /* Make the function `inline' so that it is only emitted if it is
6996 actually needed. It is unlikely that it will be inlined, since
6997 it is only called via a function pointer, but we avoid unnecessary
6998 emissions this way. */
6999 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7000 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7001 /* Build the parameter. */
7006 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7007 DECL_CONTEXT (parmdecl
) = fndecl
;
7008 TREE_USED (parmdecl
) = 1;
7009 DECL_READ_P (parmdecl
) = 1;
7010 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7014 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7016 pop_lang_context ();
7018 return current_function_decl
;
7021 /* Finish the cleanup function begun by start_cleanup_fn. */
7024 end_cleanup_fn (void)
7026 expand_or_defer_fn (finish_function (0));
7028 pop_from_top_level ();
7031 /* Generate code to handle the destruction of DECL, an object with
7032 static storage duration. */
7035 register_dtor_fn (tree decl
)
7042 bool ob_parm
, dso_parm
, use_dtor
;
7043 tree arg0
, arg1
, arg2
;
7046 type
= TREE_TYPE (decl
);
7047 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7050 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7051 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7052 destructor to "__cxa_atexit"; we don't have to build a temporary
7053 function to do the cleanup. */
7054 dso_parm
= (flag_use_cxa_atexit
7055 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7056 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7057 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7062 /* Find the destructor. */
7063 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7064 gcc_assert (idx
>= 0);
7065 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7066 /* Make sure it is accessible. */
7067 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7068 tf_warning_or_error
);
7072 /* Call build_cleanup before we enter the anonymous function so
7073 that any access checks will be done relative to the current
7074 scope, rather than the scope of the anonymous function. */
7075 build_cleanup (decl
);
7077 /* Now start the function. */
7078 cleanup
= start_cleanup_fn ();
7080 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7081 to the original function, rather than the anonymous one. That
7082 will make the back end think that nested functions are in use,
7083 which causes confusion. */
7084 push_deferring_access_checks (dk_no_check
);
7085 fcall
= build_cleanup (decl
);
7086 pop_deferring_access_checks ();
7088 /* Create the body of the anonymous function. */
7089 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7090 finish_expr_stmt (fcall
);
7091 finish_compound_stmt (compound_stmt
);
7095 /* Call atexit with the cleanup function. */
7096 mark_used (cleanup
);
7097 cleanup
= build_address (cleanup
);
7099 if (DECL_THREAD_LOCAL_P (decl
))
7100 atex_node
= get_thread_atexit_node ();
7102 atex_node
= get_atexit_node ();
7106 /* We must convert CLEANUP to the type that "__cxa_atexit"
7108 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7109 /* "__cxa_atexit" will pass the address of DECL to the
7110 cleanup function. */
7112 addr
= build_address (decl
);
7113 /* The declared type of the parameter to "__cxa_atexit" is
7114 "void *". For plain "T*", we could just let the
7115 machinery in cp_build_function_call convert it -- but if the
7116 type is "cv-qualified T *", then we need to convert it
7117 before passing it in, to avoid spurious errors. */
7118 addr
= build_nop (ptr_type_node
, addr
);
7121 /* Since the cleanup functions we build ignore the address
7122 they're given, there's no reason to pass the actual address
7123 in, and, in general, it's cheaper to pass NULL than any
7125 addr
= null_pointer_node
;
7128 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7129 tf_warning_or_error
);
7131 /* Just pass NULL to the dso handle parm if we don't actually
7132 have a DSO handle on this target. */
7133 arg2
= null_pointer_node
;
7139 if (!DECL_THREAD_LOCAL_P (decl
)
7140 && targetm
.cxx
.use_aeabi_atexit ())
7156 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7157 arg0
, arg1
, arg2
, NULL_TREE
);
7160 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7161 is its initializer. Generate code to handle the construction
7162 and destruction of DECL. */
7165 expand_static_init (tree decl
, tree init
)
7167 gcc_assert (VAR_P (decl
));
7168 gcc_assert (TREE_STATIC (decl
));
7170 /* Some variables require no dynamic initialization. */
7172 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7174 /* Make sure the destructor is callable. */
7175 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7179 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7180 && !DECL_FUNCTION_SCOPE_P (decl
))
7183 error ("non-local variable %qD declared %<__thread%> "
7184 "needs dynamic initialization", decl
);
7186 error ("non-local variable %qD declared %<__thread%> "
7187 "has a non-trivial destructor", decl
);
7188 static bool informed
;
7191 inform (DECL_SOURCE_LOCATION (decl
),
7192 "C++11 %<thread_local%> allows dynamic initialization "
7199 if (DECL_FUNCTION_SCOPE_P (decl
))
7201 /* Emit code to perform this initialization but once. */
7202 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7203 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7204 tree guard
, guard_addr
;
7206 /* We don't need thread-safety code for thread-local vars. */
7207 bool thread_guard
= (flag_threadsafe_statics
7208 && !DECL_THREAD_LOCAL_P (decl
));
7210 /* Emit code to perform this initialization but once. This code
7213 static <type> guard;
7214 if (!guard.first_byte) {
7215 if (__cxa_guard_acquire (&guard)) {
7218 // Do initialization.
7219 flag = true; __cxa_guard_release (&guard);
7220 // Register variable for destruction at end of program.
7222 if (!flag) __cxa_guard_abort (&guard);
7226 Note that the `flag' variable is only set to 1 *after* the
7227 initialization is complete. This ensures that an exception,
7228 thrown during the construction, will cause the variable to
7229 reinitialized when we pass through this code again, as per:
7233 If the initialization exits by throwing an exception, the
7234 initialization is not complete, so it will be tried again
7235 the next time control enters the declaration.
7237 This process should be thread-safe, too; multiple threads
7238 should not be able to initialize the variable more than
7241 /* Create the guard variable. */
7242 guard
= get_guard (decl
);
7244 /* This optimization isn't safe on targets with relaxed memory
7245 consistency. On such targets we force synchronization in
7246 __cxa_guard_acquire. */
7247 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7249 /* Begin the conditional initialization. */
7250 if_stmt
= begin_if_stmt ();
7251 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7252 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7257 tree vfntype
= NULL_TREE
;
7258 tree acquire_name
, release_name
, abort_name
;
7259 tree acquire_fn
, release_fn
, abort_fn
;
7260 guard_addr
= build_address (guard
);
7262 acquire_name
= get_identifier ("__cxa_guard_acquire");
7263 release_name
= get_identifier ("__cxa_guard_release");
7264 abort_name
= get_identifier ("__cxa_guard_abort");
7265 acquire_fn
= identifier_global_value (acquire_name
);
7266 release_fn
= identifier_global_value (release_name
);
7267 abort_fn
= identifier_global_value (abort_name
);
7269 acquire_fn
= push_library_fn
7270 (acquire_name
, build_function_type_list (integer_type_node
,
7271 TREE_TYPE (guard_addr
),
7273 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7274 if (!release_fn
|| !abort_fn
)
7275 vfntype
= build_function_type_list (void_type_node
,
7276 TREE_TYPE (guard_addr
),
7279 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7280 ECF_NOTHROW
| ECF_LEAF
);
7282 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7283 ECF_NOTHROW
| ECF_LEAF
);
7285 inner_if_stmt
= begin_if_stmt ();
7286 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7289 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7290 begin
= get_target_expr (boolean_false_node
);
7291 flag
= TARGET_EXPR_SLOT (begin
);
7293 TARGET_EXPR_CLEANUP (begin
)
7294 = build3 (COND_EXPR
, void_type_node
, flag
,
7296 build_call_n (abort_fn
, 1, guard_addr
));
7297 CLEANUP_EH_ONLY (begin
) = 1;
7299 /* Do the initialization itself. */
7300 init
= add_stmt_to_compound (begin
, init
);
7301 init
= add_stmt_to_compound
7302 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7303 init
= add_stmt_to_compound
7304 (init
, build_call_n (release_fn
, 1, guard_addr
));
7307 init
= add_stmt_to_compound (init
, set_guard (guard
));
7309 /* Use atexit to register a function for destroying this static
7311 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7313 finish_expr_stmt (init
);
7317 finish_compound_stmt (inner_then_clause
);
7318 finish_then_clause (inner_if_stmt
);
7319 finish_if_stmt (inner_if_stmt
);
7322 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7324 finish_compound_stmt (then_clause
);
7325 finish_then_clause (if_stmt
);
7326 finish_if_stmt (if_stmt
);
7329 else if (DECL_THREAD_LOCAL_P (decl
))
7330 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7332 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7336 /* Make TYPE a complete type based on INITIAL_VALUE.
7337 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7338 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7339 3 if the initializer list is empty (in pedantic mode). */
7342 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7345 tree type
, elt_type
;
7347 /* Don't get confused by a CONSTRUCTOR for some other type. */
7348 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7349 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7354 unsigned HOST_WIDE_INT i
;
7357 /* An array of character type can be initialized from a
7358 brace-enclosed string constant.
7360 FIXME: this code is duplicated from reshape_init. Probably
7361 we should just call reshape_init here? */
7362 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7363 && TREE_CODE (initial_value
) == CONSTRUCTOR
7364 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7366 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7367 tree value
= (*v
)[0].value
;
7369 if (TREE_CODE (value
) == STRING_CST
7370 && v
->length () == 1)
7371 initial_value
= value
;
7374 /* If any of the elements are parameter packs, we can't actually
7375 complete this type now because the array size is dependent. */
7376 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7378 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7381 if (PACK_EXPANSION_P (value
))
7387 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7389 /* We can create the array before the element type is complete, which
7390 means that we didn't have these two bits set in the original type
7391 either. In completing the type, we are expected to propagate these
7392 bits. See also complete_type which does the same thing for arrays
7395 if (TYPE_DOMAIN (type
))
7397 elt_type
= TREE_TYPE (type
);
7398 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7399 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7400 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7406 /* As above, but either give an error or reject zero-size arrays, depending
7410 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7411 bool do_default
, tsubst_flags_t complain
)
7414 bool sfinae
= !(complain
& tf_error
);
7415 /* In SFINAE context we can't be lenient about zero-size arrays. */
7418 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7424 /* Not an error. */;
7425 else if (failure
== 1)
7426 error ("initializer fails to determine size of %qT", *ptype
);
7427 else if (failure
== 2)
7430 error ("array size missing in %qT", *ptype
);
7432 else if (failure
== 3)
7433 error ("zero-size array %qT", *ptype
);
7434 *ptype
= error_mark_node
;
7439 /* Return zero if something is declared to be a member of type
7440 CTYPE when in the context of CUR_TYPE. STRING is the error
7441 message to print in that case. Otherwise, quietly return 1. */
7444 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7446 if (ctype
&& ctype
!= cur_type
)
7448 if (flags
== DTOR_FLAG
)
7449 error ("destructor for alien class %qT cannot be a member", ctype
);
7451 error ("constructor for alien class %qT cannot be a member", ctype
);
7457 /* Subroutine of `grokdeclarator'. */
7459 /* Generate errors possibly applicable for a given set of specifiers.
7460 This is for ARM $7.1.2. */
7463 bad_specifiers (tree object
,
7464 enum bad_spec_place type
,
7475 error ("%qD declared as a %<virtual%> variable", object
);
7477 error ("%qD declared as an %<inline%> variable", object
);
7479 error ("%<const%> and %<volatile%> function specifiers on "
7480 "%qD invalid in variable declaration", object
);
7484 error ("%qD declared as a %<virtual%> parameter", object
);
7486 error ("%qD declared as an %<inline%> parameter", object
);
7488 error ("%<const%> and %<volatile%> function specifiers on "
7489 "%qD invalid in parameter declaration", object
);
7493 error ("%qD declared as a %<virtual%> type", object
);
7495 error ("%qD declared as an %<inline%> type", object
);
7497 error ("%<const%> and %<volatile%> function specifiers on "
7498 "%qD invalid in type declaration", object
);
7502 error ("%qD declared as a %<virtual%> field", object
);
7504 error ("%qD declared as an %<inline%> field", object
);
7506 error ("%<const%> and %<volatile%> function specifiers on "
7507 "%qD invalid in field declaration", object
);
7513 error ("%q+D declared as a friend", object
);
7515 && (TREE_CODE (object
) == TYPE_DECL
7516 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7517 && !TYPE_REFFN_P (TREE_TYPE (object
))
7518 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7519 error ("%q+D declared with an exception specification", object
);
7522 /* DECL is a member function or static data member and is presently
7523 being defined. Check that the definition is taking place in a
7527 check_class_member_definition_namespace (tree decl
)
7529 /* These checks only apply to member functions and static data
7531 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7532 /* We check for problems with specializations in pt.c in
7533 check_specialization_namespace, where we can issue better
7535 if (processing_specialization
)
7537 /* There are no restrictions on the placement of
7538 explicit instantiations. */
7539 if (processing_explicit_instantiation
)
7543 A member function definition that appears outside of the
7544 class definition shall appear in a namespace scope enclosing
7545 the class definition.
7549 The definition for a static data member shall appear in a
7550 namespace scope enclosing the member's class definition. */
7551 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7552 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7553 decl
, DECL_CONTEXT (decl
));
7556 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7557 METHOD_TYPE for a non-static member function; QUALS are the
7558 cv-qualifiers that apply to the function. */
7561 build_this_parm (tree type
, cp_cv_quals quals
)
7566 cp_cv_quals this_quals
;
7568 if (CLASS_TYPE_P (type
))
7571 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7572 this_type
= build_pointer_type (this_type
);
7575 this_type
= type_of_this_parm (type
);
7576 /* The `this' parameter is implicitly `const'; it cannot be
7578 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7579 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7580 parm
= build_artificial_parm (this_identifier
, qual_type
);
7581 cp_apply_type_quals_to_decl (this_quals
, parm
);
7585 /* DECL is a static member function. Complain if it was declared
7586 with function-cv-quals. */
7589 check_static_quals (tree decl
, cp_cv_quals quals
)
7591 if (quals
!= TYPE_UNQUALIFIED
)
7592 error ("static member function %q#D declared with type qualifiers",
7596 /* Helper function. Replace the temporary this parameter injected
7597 during cp_finish_omp_declare_simd with the real this parameter. */
7600 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7602 tree this_parm
= (tree
) data
;
7603 if (TREE_CODE (*tp
) == PARM_DECL
7604 && DECL_NAME (*tp
) == this_identifier
7605 && *tp
!= this_parm
)
7607 else if (TYPE_P (*tp
))
7612 /* CTYPE is class type, or null if non-class.
7613 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7615 DECLARATOR is the function's name.
7616 PARMS is a chain of PARM_DECLs for the function.
7617 VIRTUALP is truthvalue of whether the function is virtual or not.
7618 FLAGS are to be passed through to `grokclassfn'.
7619 QUALS are qualifiers indicating whether the function is `const'
7621 RAISES is a list of exceptions that this function can raise.
7622 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7623 not look, and -1 if we should not call `grokclassfn' at all.
7625 SFK is the kind of special function (if any) for the new function.
7627 Returns `NULL_TREE' if something goes wrong, after issuing
7628 applicable error messages. */
7631 grokfndecl (tree ctype
,
7635 tree orig_declarator
,
7637 enum overload_flags flags
,
7639 cp_ref_qualifier rqual
,
7646 special_function_kind sfk
,
7651 location_t location
)
7654 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7658 type
= build_ref_qualified_type (type
, rqual
);
7660 type
= build_exception_variant (type
, raises
);
7662 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7664 /* If we have an explicit location, use it, otherwise use whatever
7665 build_lang_decl used (probably input_location). */
7666 if (location
!= UNKNOWN_LOCATION
)
7667 DECL_SOURCE_LOCATION (decl
) = location
;
7669 if (TREE_CODE (type
) == METHOD_TYPE
)
7672 parm
= build_this_parm (type
, quals
);
7673 DECL_CHAIN (parm
) = parms
;
7676 DECL_ARGUMENTS (decl
) = parms
;
7677 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7678 DECL_CONTEXT (t
) = decl
;
7679 /* Propagate volatile out from type to decl. */
7680 if (TYPE_VOLATILE (type
))
7681 TREE_THIS_VOLATILE (decl
) = 1;
7683 /* Setup decl according to sfk. */
7686 case sfk_constructor
:
7687 case sfk_copy_constructor
:
7688 case sfk_move_constructor
:
7689 DECL_CONSTRUCTOR_P (decl
) = 1;
7691 case sfk_destructor
:
7692 DECL_DESTRUCTOR_P (decl
) = 1;
7698 /* If pointers to member functions use the least significant bit to
7699 indicate whether a function is virtual, ensure a pointer
7700 to this function will have that bit clear. */
7701 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7702 && TREE_CODE (type
) == METHOD_TYPE
7703 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7704 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7707 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7711 ("defining explicit specialization %qD in friend declaration",
7715 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7716 tree args
= TREE_OPERAND (orig_declarator
, 1);
7718 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7720 /* Something like `template <class T> friend void f<T>()'. */
7721 error ("invalid use of template-id %qD in declaration "
7722 "of primary template",
7728 /* A friend declaration of the form friend void f<>(). Record
7729 the information in the TEMPLATE_ID_EXPR. */
7730 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7732 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7733 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7735 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7736 if (TREE_PURPOSE (t
)
7737 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7739 error ("default arguments are not allowed in declaration "
7740 "of friend template specialization %qD",
7746 error ("%<inline%> is not allowed in declaration of friend "
7747 "template specialization %qD",
7750 error ("%<constexpr%> is not allowed in declaration of friend "
7751 "template specialization %qD",
7758 /* If this decl has namespace scope, set that up. */
7760 set_decl_namespace (decl
, in_namespace
, friendp
);
7762 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7764 /* `main' and builtins have implicit 'C' linkage. */
7765 if ((MAIN_NAME_P (declarator
)
7766 || (IDENTIFIER_LENGTH (declarator
) > 10
7767 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7768 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7769 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7770 || (targetcm
.cxx_implicit_extern_c
7771 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7772 && current_lang_name
== lang_name_cplusplus
7773 && ctype
== NULL_TREE
7774 && DECL_FILE_SCOPE_P (decl
))
7775 SET_DECL_LANGUAGE (decl
, lang_c
);
7777 /* Should probably propagate const out from type to decl I bet (mrs). */
7780 DECL_STATIC_FUNCTION_P (decl
) = 1;
7781 DECL_CONTEXT (decl
) = ctype
;
7785 DECL_DELETED_FN (decl
) = 1;
7789 DECL_CONTEXT (decl
) = ctype
;
7791 check_class_member_definition_namespace (decl
);
7794 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7796 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7797 error ("cannot declare %<::main%> to be a template");
7799 error ("cannot declare %<::main%> to be inline");
7801 error ("cannot declare %<::main%> to be constexpr");
7803 error ("cannot declare %<::main%> to be static");
7808 /* Members of anonymous types and local classes have no linkage; make
7809 them internal. If a typedef is made later, this will be changed. */
7810 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7811 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7814 if (publicp
&& cxx_dialect
== cxx98
)
7816 /* [basic.link]: A name with no linkage (notably, the name of a class
7817 or enumeration declared in a local scope) shall not be used to
7818 declare an entity with linkage.
7820 DR 757 relaxes this restriction for C++0x. */
7821 no_linkage_error (decl
);
7824 TREE_PUBLIC (decl
) = publicp
;
7827 DECL_INTERFACE_KNOWN (decl
) = 1;
7828 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7831 /* If the declaration was declared inline, mark it as such. */
7834 DECL_DECLARED_INLINE_P (decl
) = 1;
7836 DECL_COMDAT (decl
) = 1;
7839 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7841 DECL_EXTERNAL (decl
) = 1;
7842 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7847 ? G_("static member function %qD cannot have cv-qualifier")
7848 : G_("non-member function %qD cannot have cv-qualifier"),
7850 quals
= TYPE_UNQUALIFIED
;
7856 ? G_("static member function %qD cannot have ref-qualifier")
7857 : G_("non-member function %qD cannot have ref-qualifier"),
7859 rqual
= REF_QUAL_NONE
;
7863 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7864 && !grok_op_properties (decl
, /*complain=*/true))
7866 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7868 bool long_long_unsigned_p
;
7870 const char *suffix
= NULL
;
7871 /* [over.literal]/6: Literal operators shall not have C linkage. */
7872 if (DECL_LANGUAGE (decl
) == lang_c
)
7874 error ("literal operator with C linkage");
7878 if (DECL_NAMESPACE_SCOPE_P (decl
))
7880 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7883 error ("%qD has invalid argument list", decl
);
7887 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7888 if (long_long_unsigned_p
)
7890 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7891 warning (0, "integer suffix %<%s%>"
7892 " shadowed by implementation", suffix
);
7894 else if (long_double_p
)
7896 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7897 warning (0, "floating point suffix %<%s%>"
7898 " shadowed by implementation", suffix
);
7903 error ("%qD must be a non-member function", decl
);
7909 /* Make the init_value nonzero so pushdecl knows this is not
7910 tentative. error_mark_node is replaced later with the BLOCK. */
7911 DECL_INITIAL (decl
) = error_mark_node
;
7913 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7914 TREE_NOTHROW (decl
) = 1;
7916 if (flag_openmp
|| flag_cilkplus
)
7918 /* Adjust "omp declare simd" attributes. */
7919 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7923 for (attr
= ods
; attr
;
7924 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7926 if (TREE_CODE (type
) == METHOD_TYPE
)
7927 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7928 DECL_ARGUMENTS (decl
), NULL
);
7929 if (TREE_VALUE (attr
) != NULL_TREE
)
7931 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7932 cl
= c_omp_declare_simd_clauses_to_numbers
7933 (DECL_ARGUMENTS (decl
), cl
);
7935 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7937 TREE_VALUE (attr
) = NULL_TREE
;
7943 /* Caller will do the rest of this. */
7947 if (ctype
!= NULL_TREE
)
7948 grokclassfn (ctype
, decl
, flags
);
7951 if (cxx_dialect
>= cxx11
7952 && DECL_DESTRUCTOR_P (decl
)
7953 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7954 && !processing_template_decl
)
7955 deduce_noexcept_on_destructor (decl
);
7957 decl
= check_explicit_specialization (orig_declarator
, decl
,
7960 4 * (friendp
!= 0));
7961 if (decl
== error_mark_node
)
7964 if (DECL_STATIC_FUNCTION_P (decl
))
7965 check_static_quals (decl
, quals
);
7969 cplus_decl_attributes (&decl
, *attrlist
, 0);
7970 *attrlist
= NULL_TREE
;
7973 /* Check main's type after attributes have been applied. */
7974 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7976 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7979 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7981 error ("%<::main%> must return %<int%>");
7982 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7983 TREE_TYPE (decl
) = newtype
;
7986 check_main_parameter_types (decl
);
7989 if (ctype
!= NULL_TREE
7990 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7993 tree old_decl
= check_classfn (ctype
, decl
,
7994 (processing_template_decl
7995 > template_class_depth (ctype
))
7996 ? current_template_parms
7999 if (old_decl
== error_mark_node
)
8007 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8008 /* Because grokfndecl is always supposed to return a
8009 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8010 here. We depend on our callers to figure out that its
8011 really a template that's being returned. */
8012 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8014 if (DECL_STATIC_FUNCTION_P (old_decl
)
8015 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8017 /* Remove the `this' parm added by grokclassfn. */
8018 revert_static_member_fn (decl
);
8019 check_static_quals (decl
, quals
);
8021 if (DECL_ARTIFICIAL (old_decl
))
8023 error ("definition of implicitly-declared %qD", old_decl
);
8026 else if (DECL_DEFAULTED_FN (old_decl
))
8028 error ("definition of explicitly-defaulted %q+D", decl
);
8029 error ("%q+#D explicitly defaulted here", old_decl
);
8033 /* Since we've smashed OLD_DECL to its
8034 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8035 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8036 decl
= DECL_TEMPLATE_RESULT (decl
);
8038 /* Attempt to merge the declarations. This can fail, in
8039 the case of some invalid specialization declarations. */
8040 pushed_scope
= push_scope (ctype
);
8041 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8043 pop_scope (pushed_scope
);
8046 error ("no %q#D member function declared in class %qT",
8050 if (ok
== error_mark_node
)
8056 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8059 if (ctype
== NULL_TREE
|| check
)
8063 DECL_VIRTUAL_P (decl
) = 1;
8068 /* decl is a FUNCTION_DECL.
8069 specifiers are the parsed virt-specifiers.
8071 Set flags to reflect the virt-specifiers.
8076 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8078 if (decl
== NULL_TREE
)
8080 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8081 DECL_OVERRIDE_P (decl
) = 1;
8082 if (specifiers
& VIRT_SPEC_FINAL
)
8083 DECL_FINAL_P (decl
) = 1;
8087 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8088 the linkage that DECL will receive in the object file. */
8091 set_linkage_for_static_data_member (tree decl
)
8093 /* A static data member always has static storage duration and
8094 external linkage. Note that static data members are forbidden in
8095 local classes -- the only situation in which a class has
8096 non-external linkage. */
8097 TREE_PUBLIC (decl
) = 1;
8098 TREE_STATIC (decl
) = 1;
8099 /* For non-template classes, static data members are always put
8100 out in exactly those files where they are defined, just as
8101 with ordinary namespace-scope variables. */
8102 if (!processing_template_decl
)
8103 DECL_INTERFACE_KNOWN (decl
) = 1;
8106 /* Create a VAR_DECL named NAME with the indicated TYPE.
8108 If SCOPE is non-NULL, it is the class type or namespace containing
8109 the variable. If SCOPE is NULL, the variable should is created in
8110 the innermost enclosing scope. */
8113 grokvardecl (tree type
,
8115 tree orig_declarator
,
8116 const cp_decl_specifier_seq
*declspecs
,
8123 tree explicit_scope
;
8125 gcc_assert (!name
|| identifier_p (name
));
8127 /* Compute the scope in which to place the variable, but remember
8128 whether or not that scope was explicitly specified by the user. */
8129 explicit_scope
= scope
;
8132 /* An explicit "extern" specifier indicates a namespace-scope
8134 if (declspecs
->storage_class
== sc_extern
)
8135 scope
= current_decl_namespace ();
8136 else if (!at_function_scope_p ())
8137 scope
= current_scope ();
8141 && (/* If the variable is a namespace-scope variable declared in a
8142 template, we need DECL_LANG_SPECIFIC. */
8143 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8144 /* Similarly for namespace-scope variables with language linkage
8146 || (TREE_CODE (scope
) == NAMESPACE_DECL
8147 && current_lang_name
!= lang_name_cplusplus
)
8148 /* Similarly for static data members. */
8150 /* Similarly for explicit specializations. */
8152 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8153 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8155 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8157 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8158 set_decl_namespace (decl
, explicit_scope
, 0);
8160 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8162 if (declspecs
->storage_class
== sc_extern
)
8164 DECL_THIS_EXTERN (decl
) = 1;
8165 DECL_EXTERNAL (decl
) = !initialized
;
8168 if (DECL_CLASS_SCOPE_P (decl
))
8170 set_linkage_for_static_data_member (decl
);
8171 /* This function is only called with out-of-class definitions. */
8172 DECL_EXTERNAL (decl
) = 0;
8173 check_class_member_definition_namespace (decl
);
8175 /* At top level, either `static' or no s.c. makes a definition
8176 (perhaps tentative), and absence of `static' makes it public. */
8177 else if (toplevel_bindings_p ())
8179 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8180 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8181 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8183 /* Not at top level, only `static' makes a static definition. */
8186 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8187 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8190 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8192 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8193 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8194 if (declspecs
->gnu_thread_keyword_p
)
8195 DECL_GNU_TLS_P (decl
) = true;
8198 /* If the type of the decl has no linkage, make sure that we'll
8199 notice that in mark_used. */
8200 if (cxx_dialect
> cxx98
8201 && decl_linkage (decl
) != lk_none
8202 && DECL_LANG_SPECIFIC (decl
) == NULL
8203 && !DECL_EXTERN_C_P (decl
)
8204 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8205 retrofit_lang_decl (decl
);
8207 if (TREE_PUBLIC (decl
))
8209 /* [basic.link]: A name with no linkage (notably, the name of a class
8210 or enumeration declared in a local scope) shall not be used to
8211 declare an entity with linkage.
8213 DR 757 relaxes this restriction for C++0x. */
8214 if (cxx_dialect
< cxx11
)
8215 no_linkage_error (decl
);
8218 DECL_INTERFACE_KNOWN (decl
) = 1;
8220 // Handle explicit specializations and instantiations of variable templates.
8221 if (orig_declarator
)
8222 decl
= check_explicit_specialization (orig_declarator
, decl
,
8225 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8228 /* Create and return a canonical pointer to member function type, for
8229 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8232 build_ptrmemfunc_type (tree type
)
8237 if (type
== error_mark_node
)
8240 /* If a canonical type already exists for this type, use it. We use
8241 this method instead of type_hash_canon, because it only does a
8242 simple equality check on the list of field members. */
8244 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8247 /* Make sure that we always have the unqualified pointer-to-member
8249 if (cp_cv_quals quals
= cp_type_quals (type
))
8251 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8252 return cp_build_qualified_type (unqual
, quals
);
8255 t
= make_node (RECORD_TYPE
);
8257 /* Let the front end know this is a pointer to member function. */
8258 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8260 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8263 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8265 DECL_CHAIN (field
) = fields
;
8268 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8270 /* Zap out the name so that the back end will give us the debugging
8271 information for this anonymous RECORD_TYPE. */
8272 TYPE_NAME (t
) = NULL_TREE
;
8274 /* Cache this pointer-to-member type so that we can find it again
8276 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8278 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8279 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8280 else if (TYPE_CANONICAL (type
) != type
)
8281 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8286 /* Create and return a pointer to data member type. */
8289 build_ptrmem_type (tree class_type
, tree member_type
)
8291 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8293 cp_cv_quals quals
= type_memfn_quals (member_type
);
8294 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8295 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8296 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8300 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8301 return build_offset_type (class_type
, member_type
);
8305 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8306 Check to see that the definition is valid. Issue appropriate error
8307 messages. Return 1 if the definition is particularly bad, or 0
8311 check_static_variable_definition (tree decl
, tree type
)
8313 /* Can't check yet if we don't know the type. */
8314 if (dependent_type_p (type
))
8316 /* If DECL is declared constexpr, we'll do the appropriate checks
8317 in check_initializer. */
8318 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8320 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8322 if (!COMPLETE_TYPE_P (type
))
8323 error ("in-class initialization of static data member %q#D of "
8324 "incomplete type", decl
);
8325 else if (literal_type_p (type
))
8326 permerror (input_location
,
8327 "%<constexpr%> needed for in-class initialization of "
8328 "static data member %q#D of non-integral type", decl
);
8330 error ("in-class initialization of static data member %q#D of "
8331 "non-literal type", decl
);
8335 /* Motion 10 at San Diego: If a static const integral data member is
8336 initialized with an integral constant expression, the initializer
8337 may appear either in the declaration (within the class), or in
8338 the definition, but not both. If it appears in the class, the
8339 member is a member constant. The file-scope definition is always
8341 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8343 error ("invalid in-class initialization of static data member "
8344 "of non-integral type %qT",
8348 else if (!CP_TYPE_CONST_P (type
))
8349 error ("ISO C++ forbids in-class initialization of non-const "
8350 "static member %qD",
8352 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8353 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8354 "%qD of non-integral type %qT", decl
, type
);
8359 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8360 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8361 expressions out into temporary variables so that walk_tree doesn't
8362 step into them (c++/15764). */
8365 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8367 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8368 tree expr
= *expr_p
;
8369 if (TREE_CODE (expr
) == SAVE_EXPR
)
8371 tree op
= TREE_OPERAND (expr
, 0);
8372 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8373 if (TREE_SIDE_EFFECTS (op
))
8374 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8377 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8382 /* Entry point for the above. */
8385 stabilize_vla_size (tree size
)
8387 hash_set
<tree
> pset
;
8388 /* Break out any function calls into temporary variables. */
8389 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8392 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8393 not inside of SAVE_EXPR and fold them. */
8396 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8398 tree expr
= *expr_p
;
8399 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8401 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8403 *(bool *)data
= true;
8404 if (SIZEOF_EXPR_TYPE_P (expr
))
8405 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8406 SIZEOF_EXPR
, false);
8407 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8408 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8411 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8413 if (expr
== error_mark_node
)
8414 expr
= size_one_node
;
8421 /* Given the SIZE (i.e., number of elements) in an array, compute an
8422 appropriate index type for the array. If non-NULL, NAME is the
8423 name of the thing being declared. */
8426 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8431 if (error_operand_p (size
))
8432 return error_mark_node
;
8434 if (!type_dependent_expression_p (size
))
8436 tree type
= TREE_TYPE (size
);
8438 mark_rvalue_use (size
);
8440 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8441 && TREE_SIDE_EFFECTS (size
))
8442 /* In C++98, we mark a non-constant array bound with a magic
8443 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8446 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8448 if (CLASS_TYPE_P (type
)
8449 && CLASSTYPE_LITERAL_P (type
))
8451 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8454 if (!(complain
& tf_error
))
8455 return error_mark_node
;
8457 error ("size of array %qD has non-integral type %qT",
8460 error ("size of array has non-integral type %qT", type
);
8461 size
= integer_one_node
;
8463 if (size
== error_mark_node
)
8464 return error_mark_node
;
8465 type
= TREE_TYPE (size
);
8468 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8469 size
= maybe_constant_value (size
);
8471 if (!TREE_CONSTANT (size
))
8475 if (error_operand_p (size
))
8476 return error_mark_node
;
8478 /* The array bound must be an integer type. */
8479 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8481 if (!(complain
& tf_error
))
8482 return error_mark_node
;
8484 error ("size of array %qD has non-integral type %qT", name
, type
);
8486 error ("size of array has non-integral type %qT", type
);
8487 size
= integer_one_node
;
8488 type
= TREE_TYPE (size
);
8492 /* A type is dependent if it is...an array type constructed from any
8493 dependent type or whose size is specified by a constant expression
8494 that is value-dependent. */
8495 /* We can only call value_dependent_expression_p on integral constant
8496 expressions; treat non-constant expressions as dependent, too. */
8497 if (processing_template_decl
8498 && (type_dependent_expression_p (size
)
8499 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8501 /* We cannot do any checking for a SIZE that isn't known to be
8502 constant. Just build the index type and mark that it requires
8503 structural equality checks. */
8504 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8505 size
, size_one_node
));
8506 TYPE_DEPENDENT_P (itype
) = 1;
8507 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8508 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8512 /* Normally, the array-bound will be a constant. */
8513 if (TREE_CODE (size
) == INTEGER_CST
)
8515 /* Check to see if the array bound overflowed. Make that an
8516 error, no matter how generous we're being. */
8517 constant_expression_error (size
);
8519 /* An array must have a positive number of elements. */
8520 if (tree_int_cst_lt (size
, integer_zero_node
))
8522 if (!(complain
& tf_error
))
8523 return error_mark_node
;
8525 error ("size of array %qD is negative", name
);
8527 error ("size of array is negative");
8528 size
= integer_one_node
;
8530 /* As an extension we allow zero-sized arrays. */
8531 else if (integer_zerop (size
))
8533 if (!(complain
& tf_error
))
8534 /* We must fail if performing argument deduction (as
8535 indicated by the state of complain), so that
8536 another substitution can be found. */
8537 return error_mark_node
;
8538 else if (in_system_header_at (input_location
))
8539 /* Allow them in system headers because glibc uses them. */;
8541 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8543 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8546 else if (TREE_CONSTANT (size
)
8547 /* We don't allow VLAs at non-function scopes, or during
8548 tentative template substitution. */
8549 || !at_function_scope_p ()
8550 || !(complain
& tf_error
))
8552 if (!(complain
& tf_error
))
8553 return error_mark_node
;
8554 /* `(int) &fn' is not a valid array bound. */
8556 error ("size of array %qD is not an integral constant-expression",
8559 error ("size of array is not an integral constant-expression");
8560 size
= integer_one_node
;
8562 else if (pedantic
&& warn_vla
!= 0)
8565 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8567 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8569 else if (warn_vla
> 0)
8573 "variable length array %qD is used", name
);
8576 "variable length array is used");
8579 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8580 /* A variable sized array. */
8581 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8584 HOST_WIDE_INT saved_processing_template_decl
;
8586 /* Compute the index of the largest element in the array. It is
8587 one less than the number of elements in the array. We save
8588 and restore PROCESSING_TEMPLATE_DECL so that computations in
8589 cp_build_binary_op will be appropriately folded. */
8590 saved_processing_template_decl
= processing_template_decl
;
8591 processing_template_decl
= 0;
8592 itype
= cp_build_binary_op (input_location
,
8594 cp_convert (ssizetype
, size
, complain
),
8595 cp_convert (ssizetype
, integer_one_node
,
8598 itype
= fold (itype
);
8599 processing_template_decl
= saved_processing_template_decl
;
8601 if (!TREE_CONSTANT (itype
))
8603 /* A variable sized array. */
8604 itype
= variable_size (itype
);
8606 if (TREE_CODE (itype
) != SAVE_EXPR
)
8608 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8609 they might survive till gimplification. */
8610 tree newitype
= itype
;
8612 cp_walk_tree_without_duplicates (&newitype
,
8613 fold_sizeof_expr_r
, &found
);
8615 itype
= variable_size (fold (newitype
));
8618 stabilize_vla_size (itype
);
8620 if (flag_sanitize
& SANITIZE_VLA
8621 && do_ubsan_in_current_function ())
8623 /* We have to add 1 -- in the ubsan routine we generate
8624 LE_EXPR rather than LT_EXPR. */
8625 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8626 build_one_cst (TREE_TYPE (itype
)));
8627 t
= ubsan_instrument_vla (input_location
, t
);
8628 finish_expr_stmt (t
);
8631 /* Make sure that there was no overflow when creating to a signed
8632 index type. (For example, on a 32-bit machine, an array with
8633 size 2^32 - 1 is too big.) */
8634 else if (TREE_CODE (itype
) == INTEGER_CST
8635 && TREE_OVERFLOW (itype
))
8637 if (!(complain
& tf_error
))
8638 return error_mark_node
;
8639 error ("overflow in array dimension");
8640 TREE_OVERFLOW (itype
) = 0;
8644 /* Create and return the appropriate index type. */
8645 itype
= build_index_type (itype
);
8647 /* If the index type were dependent, we would have returned early, so
8648 remember that it isn't. */
8649 TYPE_DEPENDENT_P (itype
) = 0;
8650 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8654 /* Returns the scope (if any) in which the entity declared by
8655 DECLARATOR will be located. If the entity was declared with an
8656 unqualified name, NULL_TREE is returned. */
8659 get_scope_of_declarator (const cp_declarator
*declarator
)
8661 while (declarator
&& declarator
->kind
!= cdk_id
)
8662 declarator
= declarator
->declarator
;
8664 /* If the declarator-id is a SCOPE_REF, the scope in which the
8665 declaration occurs is the first operand. */
8667 && declarator
->u
.id
.qualifying_scope
)
8668 return declarator
->u
.id
.qualifying_scope
;
8670 /* Otherwise, the declarator is not a qualified name; the entity will
8671 be declared in the current scope. */
8675 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8676 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8680 create_array_type_for_decl (tree name
, tree type
, tree size
)
8682 tree itype
= NULL_TREE
;
8684 /* If things have already gone awry, bail now. */
8685 if (type
== error_mark_node
|| size
== error_mark_node
)
8686 return error_mark_node
;
8688 /* 8.3.4/1: If the type of the identifier of D contains the auto
8689 type-specifier, the program is ill-formed. */
8690 if (type_uses_auto (type
))
8692 error ("%qD declared as array of %qT", name
, type
);
8693 return error_mark_node
;
8696 /* If there are some types which cannot be array elements,
8697 issue an error-message and return. */
8698 switch (TREE_CODE (type
))
8702 error ("declaration of %qD as array of void", name
);
8704 error ("creating array of void");
8705 return error_mark_node
;
8709 error ("declaration of %qD as array of functions", name
);
8711 error ("creating array of functions");
8712 return error_mark_node
;
8714 case REFERENCE_TYPE
:
8716 error ("declaration of %qD as array of references", name
);
8718 error ("creating array of references");
8719 return error_mark_node
;
8723 error ("declaration of %qD as array of function members", name
);
8725 error ("creating array of function members");
8726 return error_mark_node
;
8734 The constant expressions that specify the bounds of the arrays
8735 can be omitted only for the first member of the sequence. */
8736 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8739 error ("declaration of %qD as multidimensional array must "
8740 "have bounds for all dimensions except the first",
8743 error ("multidimensional array must have bounds for all "
8744 "dimensions except the first");
8746 return error_mark_node
;
8749 /* Figure out the index type for the array. */
8751 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8754 T is called the array element type; this type shall not be [...] an
8755 abstract class type. */
8756 abstract_virtuals_error (name
, type
);
8758 return build_cplus_array_type (type
, itype
);
8761 /* Check that it's OK to declare a function with the indicated TYPE.
8762 SFK indicates the kind of special function (if any) that this
8763 function is. OPTYPE is the type given in a conversion operator
8764 declaration, or the class type for a constructor/destructor.
8765 Returns the actual return type of the function; that
8766 may be different than TYPE if an error occurs, or for certain
8767 special functions. */
8770 check_special_function_return_type (special_function_kind sfk
,
8776 case sfk_constructor
:
8778 error ("return type specification for constructor invalid");
8780 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8781 type
= build_pointer_type (optype
);
8783 type
= void_type_node
;
8786 case sfk_destructor
:
8788 error ("return type specification for destructor invalid");
8789 /* We can't use the proper return type here because we run into
8790 problems with ambiguous bases and covariant returns.
8791 Java classes are left unchanged because (void *) isn't a valid
8792 Java type, and we don't want to change the Java ABI. */
8793 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8794 type
= build_pointer_type (void_type_node
);
8796 type
= void_type_node
;
8799 case sfk_conversion
:
8801 error ("return type specified for %<operator %T%>", optype
);
8812 /* A variable or data member (whose unqualified name is IDENTIFIER)
8813 has been declared with the indicated TYPE. If the TYPE is not
8814 acceptable, issue an error message and return a type to use for
8815 error-recovery purposes. */
8818 check_var_type (tree identifier
, tree type
)
8820 if (VOID_TYPE_P (type
))
8823 error ("unnamed variable or field declared void");
8824 else if (identifier_p (identifier
))
8826 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8827 error ("variable or field %qE declared void", identifier
);
8830 error ("variable or field declared void");
8831 type
= error_mark_node
;
8837 /* Given declspecs and a declarator (abstract or otherwise), determine
8838 the name and type of the object declared and construct a DECL node
8841 DECLSPECS points to the representation of declaration-specifier
8842 sequence that precedes declarator.
8844 DECL_CONTEXT says which syntactic context this declaration is in:
8845 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8846 FUNCDEF for a function definition. Like NORMAL but a few different
8847 error messages in each case. Return value may be zero meaning
8848 this definition is too screwy to try to parse.
8849 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8850 handle member functions (which have FIELD context).
8851 Return value may be zero meaning this definition is too screwy to
8853 PARM for a parameter declaration (either within a function prototype
8854 or before a function body). Make a PARM_DECL, or return void_type_node.
8855 TPARM for a template parameter declaration.
8856 CATCHPARM for a parameter declaration before a catch clause.
8857 TYPENAME if for a typename (in a cast or sizeof).
8858 Don't make a DECL node; just return the ..._TYPE node.
8859 FIELD for a struct or union field; make a FIELD_DECL.
8860 BITFIELD for a field with specified width.
8862 INITIALIZED is as for start_decl.
8864 ATTRLIST is a pointer to the list of attributes, which may be NULL
8865 if there are none; *ATTRLIST may be modified if attributes from inside
8866 the declarator should be applied to the declaration.
8868 When this function is called, scoping variables (such as
8869 CURRENT_CLASS_TYPE) should reflect the scope in which the
8870 declaration occurs, not the scope in which the new declaration will
8871 be placed. For example, on:
8875 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8878 Returns a DECL (if a declarator is present), a TYPE (if there is no
8879 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8883 grokdeclarator (const cp_declarator
*declarator
,
8884 cp_decl_specifier_seq
*declspecs
,
8885 enum decl_context decl_context
,
8889 tree type
= NULL_TREE
;
8891 int explicit_intN
= 0;
8892 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8893 int explicit_int
= 0;
8894 int explicit_char
= 0;
8895 int defaulted_int
= 0;
8897 tree typedef_decl
= NULL_TREE
;
8898 const char *name
= NULL
;
8899 tree typedef_type
= NULL_TREE
;
8900 /* True if this declarator is a function definition. */
8901 bool funcdef_flag
= false;
8902 cp_declarator_kind innermost_code
= cdk_error
;
8905 /* See the code below that used this. */
8906 tree decl_attr
= NULL_TREE
;
8909 /* Keep track of what sort of function is being processed
8910 so that we can warn about default return values, or explicit
8911 return values which do not match prescribed defaults. */
8912 special_function_kind sfk
= sfk_none
;
8914 tree dname
= NULL_TREE
;
8915 tree ctor_return_type
= NULL_TREE
;
8916 enum overload_flags flags
= NO_SPECIAL
;
8917 /* cv-qualifiers that apply to the declarator, for a declaration of
8918 a member function. */
8919 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8920 /* virt-specifiers that apply to the declarator, for a declaration of
8921 a member function. */
8922 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8923 /* ref-qualifier that applies to the declarator, for a declaration of
8924 a member function. */
8925 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8926 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8928 tree raises
= NULL_TREE
;
8929 int template_count
= 0;
8930 tree returned_attrs
= NULL_TREE
;
8931 tree parms
= NULL_TREE
;
8932 const cp_declarator
*id_declarator
;
8933 /* The unqualified name of the declarator; either an
8934 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8935 tree unqualified_id
;
8936 /* The class type, if any, in which this entity is located,
8937 or NULL_TREE if none. Note that this value may be different from
8938 the current class type; for example if an attempt is made to declare
8939 "A::f" inside "B", this value will be "A". */
8940 tree ctype
= current_class_type
;
8941 /* The NAMESPACE_DECL for the namespace in which this entity is
8942 located. If an unqualified name is used to declare the entity,
8943 this value will be NULL_TREE, even if the entity is located at
8945 tree in_namespace
= NULL_TREE
;
8946 cp_storage_class storage_class
;
8947 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8948 bool type_was_error_mark_node
= false;
8949 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8950 bool template_type_arg
= false;
8951 bool template_parm_flag
= false;
8952 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8953 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8954 bool late_return_type_p
= false;
8955 bool array_parameter_p
= false;
8956 source_location saved_loc
= input_location
;
8959 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8960 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8961 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8962 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8963 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8964 explicit_intN
= declspecs
->explicit_intN_p
;
8965 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8967 if (decl_context
== FUNCDEF
)
8968 funcdef_flag
= true, decl_context
= NORMAL
;
8969 else if (decl_context
== MEMFUNCDEF
)
8970 funcdef_flag
= true, decl_context
= FIELD
;
8971 else if (decl_context
== BITFIELD
)
8972 bitfield
= 1, decl_context
= FIELD
;
8973 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8974 template_type_arg
= true, decl_context
= TYPENAME
;
8975 else if (decl_context
== TPARM
)
8976 template_parm_flag
= true, decl_context
= PARM
;
8978 if (initialized
> 1)
8979 funcdef_flag
= true;
8981 /* Look inside a declarator for the name being declared
8982 and get it as a string, for an error message. */
8983 for (id_declarator
= declarator
;
8985 id_declarator
= id_declarator
->declarator
)
8987 if (id_declarator
->kind
!= cdk_id
)
8988 innermost_code
= id_declarator
->kind
;
8990 switch (id_declarator
->kind
)
8993 if (id_declarator
->declarator
8994 && id_declarator
->declarator
->kind
== cdk_id
)
8996 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8997 if (sfk
== sfk_destructor
)
9004 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9005 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9008 if (qualifying_scope
)
9010 if (at_function_scope_p ())
9014 A declarator-id shall not be qualified except
9017 None of the cases are permitted in block
9019 if (qualifying_scope
== global_namespace
)
9020 error ("invalid use of qualified-name %<::%D%>",
9022 else if (TYPE_P (qualifying_scope
))
9023 error ("invalid use of qualified-name %<%T::%D%>",
9024 qualifying_scope
, decl
);
9026 error ("invalid use of qualified-name %<%D::%D%>",
9027 qualifying_scope
, decl
);
9028 return error_mark_node
;
9030 else if (TYPE_P (qualifying_scope
))
9032 ctype
= qualifying_scope
;
9033 if (!MAYBE_CLASS_TYPE_P (ctype
))
9035 error ("%q#T is not a class or a namespace", ctype
);
9038 else if (innermost_code
!= cdk_function
9039 && current_class_type
9040 && !uniquely_derived_from_p (ctype
,
9041 current_class_type
))
9043 error ("invalid use of qualified-name %<%T::%D%>",
9044 qualifying_scope
, decl
);
9045 return error_mark_node
;
9048 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9049 in_namespace
= qualifying_scope
;
9051 switch (TREE_CODE (decl
))
9057 if (innermost_code
!= cdk_function
)
9059 error ("declaration of %qD as non-function", decl
);
9060 return error_mark_node
;
9062 else if (!qualifying_scope
9063 && !(current_class_type
&& at_class_scope_p ()))
9065 error ("declaration of %qD as non-member", decl
);
9066 return error_mark_node
;
9069 type
= TREE_OPERAND (decl
, 0);
9071 type
= constructor_name (type
);
9072 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9077 case TEMPLATE_ID_EXPR
:
9079 tree fns
= TREE_OPERAND (decl
, 0);
9082 if (!identifier_p (dname
))
9084 if (variable_template_p (dname
))
9085 dname
= DECL_NAME (dname
);
9088 gcc_assert (is_overloaded_fn (dname
));
9089 dname
= DECL_NAME (get_first_fn (dname
));
9095 case IDENTIFIER_NODE
:
9096 if (identifier_p (decl
))
9099 if (C_IS_RESERVED_WORD (dname
))
9101 error ("declarator-id missing; using reserved word %qD",
9103 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9105 else if (!IDENTIFIER_TYPENAME_P (dname
))
9106 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9109 gcc_assert (flags
== NO_SPECIAL
);
9110 flags
= TYPENAME_FLAG
;
9111 ctor_return_type
= TREE_TYPE (dname
);
9112 sfk
= sfk_conversion
;
9113 if (is_typename_at_global_scope (dname
))
9114 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9116 name
= "<invalid operator>";
9133 return error_mark_node
;
9138 if (id_declarator
->kind
== cdk_id
)
9144 The declarator in a function-definition shall have the form
9145 D1 ( parameter-declaration-clause) ... */
9146 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9148 error ("function definition does not declare parameters");
9149 return error_mark_node
;
9152 if (flags
== TYPENAME_FLAG
9153 && innermost_code
!= cdk_function
9154 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9156 error ("declaration of %qD as non-function", dname
);
9157 return error_mark_node
;
9161 && identifier_p (dname
)
9162 && UDLIT_OPER_P (dname
)
9163 && innermost_code
!= cdk_function
)
9165 error ("declaration of %qD as non-function", dname
);
9166 return error_mark_node
;
9169 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9173 error ("declaration of %qD as %<typedef%>", dname
);
9174 return error_mark_node
;
9176 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9178 error ("declaration of %qD as parameter", dname
);
9179 return error_mark_node
;
9183 /* Anything declared one level down from the top level
9184 must be one of the parameters of a function
9185 (because the body is at least two levels down). */
9187 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9188 by not allowing C++ class definitions to specify their parameters
9189 with xdecls (must be spec.d in the parmlist).
9191 Since we now wait to push a class scope until we are sure that
9192 we are in a legitimate method context, we must set oldcname
9193 explicitly (since current_class_name is not yet alive).
9195 We also want to avoid calling this a PARM if it is in a namespace. */
9197 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9199 cp_binding_level
*b
= current_binding_level
;
9200 current_binding_level
= b
->level_chain
;
9201 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9202 decl_context
= PARM
;
9203 current_binding_level
= b
;
9207 name
= decl_context
== PARM
? "parameter" : "type name";
9209 if (constexpr_p
&& typedef_p
)
9211 error ("%<constexpr%> cannot appear in a typedef declaration");
9212 return error_mark_node
;
9215 /* If there were multiple types specified in the decl-specifier-seq,
9216 issue an error message. */
9217 if (declspecs
->multiple_types_p
)
9219 error ("two or more data types in declaration of %qs", name
);
9220 return error_mark_node
;
9223 if (declspecs
->conflicting_specifiers_p
)
9225 error ("conflicting specifiers in declaration of %qs", name
);
9226 return error_mark_node
;
9229 /* Extract the basic type from the decl-specifier-seq. */
9230 type
= declspecs
->type
;
9231 if (type
== error_mark_node
)
9234 type_was_error_mark_node
= true;
9236 /* If the entire declaration is itself tagged as deprecated then
9237 suppress reports of deprecated items. */
9238 if (type
&& TREE_DEPRECATED (type
)
9239 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9240 warn_deprecated_use (type
, NULL_TREE
);
9241 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9243 typedef_decl
= type
;
9244 type
= TREE_TYPE (typedef_decl
);
9245 if (TREE_DEPRECATED (type
)
9246 && DECL_ARTIFICIAL (typedef_decl
)
9247 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9248 warn_deprecated_use (type
, NULL_TREE
);
9250 /* No type at all: default to `int', and set DEFAULTED_INT
9251 because it was not a user-defined typedef. */
9252 if (type
== NULL_TREE
)
9254 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9256 /* These imply 'int'. */
9257 type
= integer_type_node
;
9260 /* If we just have "complex", it is equivalent to "complex double". */
9261 else if (!longlong
&& !explicit_intN
9262 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9264 type
= double_type_node
;
9265 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9266 "ISO C++ does not support plain %<complex%> meaning "
9267 "%<double complex%>");
9271 explicit_int
= declspecs
->explicit_int_p
;
9272 explicit_char
= declspecs
->explicit_char_p
;
9275 /* See the code below that used this. */
9277 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9279 typedef_type
= type
;
9282 if (sfk
!= sfk_conversion
)
9283 ctor_return_type
= ctype
;
9285 if (sfk
!= sfk_none
)
9286 type
= check_special_function_return_type (sfk
, type
,
9288 else if (type
== NULL_TREE
)
9294 /* We handle `main' specially here, because 'main () { }' is so
9295 common. With no options, it is allowed. With -Wreturn-type,
9296 it is a warning. It is only an error with -pedantic-errors. */
9297 is_main
= (funcdef_flag
9298 && dname
&& identifier_p (dname
)
9299 && MAIN_NAME_P (dname
)
9300 && ctype
== NULL_TREE
9301 && in_namespace
== NULL_TREE
9302 && current_namespace
== global_namespace
);
9304 if (type_was_error_mark_node
)
9305 /* We've already issued an error, don't complain more. */;
9306 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9307 /* Allow it, sigh. */;
9309 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9311 pedwarn (input_location
, OPT_Wpedantic
,
9312 "ISO C++ forbids declaration of %qs with no type", name
);
9314 warning (OPT_Wreturn_type
,
9315 "ISO C++ forbids declaration of %qs with no type", name
);
9317 type
= integer_type_node
;
9324 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9326 error ("%<__int%d%> is not supported by this target",
9327 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9328 explicit_intN
= false;
9330 else if (pedantic
&& ! in_system_header_at (input_location
))
9331 pedwarn (input_location
, OPT_Wpedantic
,
9332 "ISO C++ does not support %<__int%d%> for %qs",
9333 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9336 /* Now process the modifiers that were specified
9337 and check for invalid combinations. */
9339 /* Long double is a special combination. */
9340 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9343 type
= cp_build_qualified_type (long_double_type_node
,
9344 cp_type_quals (type
));
9347 /* Check all other uses of type modifiers. */
9349 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9353 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9354 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9355 else if (signed_p
&& unsigned_p
)
9356 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9357 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9358 error ("%<long long%> invalid for %qs", name
);
9359 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9360 error ("%<long%> invalid for %qs", name
);
9361 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9362 error ("%<short%> invalid for %qs", name
);
9363 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9364 error ("%<long%> or %<short%> invalid for %qs", name
);
9365 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9366 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9367 else if ((long_p
|| short_p
) && explicit_char
)
9368 error ("%<long%> or %<short%> specified with char for %qs", name
);
9369 else if (long_p
&& short_p
)
9370 error ("%<long%> and %<short%> specified together for %qs", name
);
9371 else if (type
== char16_type_node
|| type
== char32_type_node
)
9373 if (signed_p
|| unsigned_p
)
9374 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9375 else if (short_p
|| long_p
)
9376 error ("%<short%> or %<long%> invalid for %qs", name
);
9381 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9383 pedwarn (input_location
, OPT_Wpedantic
,
9384 "long, short, signed or unsigned used invalidly for %qs",
9386 if (flag_pedantic_errors
)
9391 /* Discard the type modifiers if they are invalid. */
9402 /* Decide whether an integer type is signed or not.
9403 Optionally treat bitfields as signed by default. */
9407 It is implementation-defined whether a plain (neither
9408 explicitly signed or unsigned) char, short, int, or long
9409 bit-field is signed or unsigned.
9411 Naturally, we extend this to long long as well. Note that
9412 this does not include wchar_t. */
9413 || (bitfield
&& !flag_signed_bitfields
9415 /* A typedef for plain `int' without `signed' can be
9416 controlled just like plain `int', but a typedef for
9417 `signed int' cannot be so controlled. */
9419 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9420 && TREE_CODE (type
) == INTEGER_TYPE
9421 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9424 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9426 type
= long_long_unsigned_type_node
;
9428 type
= long_unsigned_type_node
;
9430 type
= short_unsigned_type_node
;
9431 else if (type
== char_type_node
)
9432 type
= unsigned_char_type_node
;
9433 else if (typedef_decl
)
9434 type
= unsigned_type_for (type
);
9436 type
= unsigned_type_node
;
9438 else if (signed_p
&& type
== char_type_node
)
9439 type
= signed_char_type_node
;
9440 else if (explicit_intN
)
9441 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9443 type
= long_long_integer_type_node
;
9445 type
= long_integer_type_node
;
9447 type
= short_integer_type_node
;
9449 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9451 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9452 error ("complex invalid for %qs", name
);
9453 /* If a modifier is specified, the resulting complex is the complex
9454 form of TYPE. E.g, "complex short" is "complex short int". */
9455 else if (type
== integer_type_node
)
9456 type
= complex_integer_type_node
;
9457 else if (type
== float_type_node
)
9458 type
= complex_float_type_node
;
9459 else if (type
== double_type_node
)
9460 type
= complex_double_type_node
;
9461 else if (type
== long_double_type_node
)
9462 type
= complex_long_double_type_node
;
9464 type
= build_complex_type (type
);
9467 type_quals
= TYPE_UNQUALIFIED
;
9468 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9469 type_quals
|= TYPE_QUAL_CONST
;
9470 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9471 type_quals
|= TYPE_QUAL_VOLATILE
;
9472 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9473 type_quals
|= TYPE_QUAL_RESTRICT
;
9474 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9475 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9478 /* If we're using the injected-class-name to form a compound type or a
9479 declaration, replace it with the underlying class so we don't get
9480 redundant typedefs in the debug output. But if we are returning the
9481 type unchanged, leave it alone so that it's available to
9482 maybe_get_template_decl_from_type_decl. */
9483 if (CLASS_TYPE_P (type
)
9484 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9485 && type
== TREE_TYPE (TYPE_NAME (type
))
9486 && (declarator
|| type_quals
))
9487 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9489 type_quals
|= cp_type_quals (type
);
9490 type
= cp_build_qualified_type_real
9491 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9492 || declspecs
->decltype_p
)
9493 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9494 /* We might have ignored or rejected some of the qualifiers. */
9495 type_quals
= cp_type_quals (type
);
9498 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9499 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9500 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9502 storage_class
= declspecs
->storage_class
;
9503 if (storage_class
== sc_static
)
9504 staticp
= 1 + (decl_context
== FIELD
);
9506 if (virtualp
&& staticp
== 2)
9508 error ("member %qD cannot be declared both virtual and static", dname
);
9509 storage_class
= sc_none
;
9512 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9514 /* Issue errors about use of storage classes for parameters. */
9515 if (decl_context
== PARM
)
9519 error ("typedef declaration invalid in parameter declaration");
9520 return error_mark_node
;
9522 else if (template_parm_flag
&& storage_class
!= sc_none
)
9524 error ("storage class specified for template parameter %qs", name
);
9525 return error_mark_node
;
9527 else if (storage_class
== sc_static
9528 || storage_class
== sc_extern
9530 error ("storage class specifiers invalid in parameter declarations");
9532 /* Function parameters cannot be constexpr. If we saw one, moan
9533 and pretend it wasn't there. */
9536 error ("a parameter cannot be declared %<constexpr%>");
9541 /* Give error if `virtual' is used outside of class declaration. */
9543 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9545 error ("%<virtual%> outside class declaration");
9549 /* Static anonymous unions are dealt with here. */
9550 if (staticp
&& decl_context
== TYPENAME
9552 && ANON_AGGR_TYPE_P (declspecs
->type
))
9553 decl_context
= FIELD
;
9555 /* Warn about storage classes that are invalid for certain
9556 kinds of declarations (parameters, typenames, etc.). */
9559 && storage_class
!= sc_extern
9560 && storage_class
!= sc_static
)
9563 error ("multiple storage classes in declaration of %qs", name
);
9566 if (decl_context
!= NORMAL
9567 && ((storage_class
!= sc_none
9568 && storage_class
!= sc_mutable
)
9571 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9572 && (storage_class
== sc_register
9573 || storage_class
== sc_auto
))
9577 else if (decl_context
== FIELD
9578 /* C++ allows static class elements. */
9579 && storage_class
== sc_static
)
9580 /* C++ also allows inlines and signed and unsigned elements,
9581 but in those cases we don't come in here. */
9585 if (decl_context
== FIELD
)
9586 error ("storage class specified for %qs", name
);
9589 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9590 error ("storage class specified for parameter %qs", name
);
9592 error ("storage class specified for typename");
9594 if (storage_class
== sc_register
9595 || storage_class
== sc_auto
9596 || storage_class
== sc_extern
9598 storage_class
= sc_none
;
9601 else if (storage_class
== sc_extern
&& funcdef_flag
9602 && ! toplevel_bindings_p ())
9603 error ("nested function %qs declared %<extern%>", name
);
9604 else if (toplevel_bindings_p ())
9606 if (storage_class
== sc_auto
)
9607 error ("top-level declaration of %qs specifies %<auto%>", name
);
9610 && storage_class
!= sc_extern
9611 && storage_class
!= sc_static
)
9613 if (declspecs
->gnu_thread_keyword_p
)
9614 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9615 "declared %<__thread%>", name
);
9617 /* When thread_local is applied to a variable of block scope the
9618 storage-class-specifier static is implied if it does not appear
9620 storage_class
= declspecs
->storage_class
= sc_static
;
9624 if (storage_class
&& friendp
)
9626 error ("storage class specifiers invalid in friend function declarations");
9627 storage_class
= sc_none
;
9632 unqualified_id
= NULL_TREE
;
9635 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9636 switch (TREE_CODE (unqualified_id
))
9639 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9640 if (TYPE_P (unqualified_id
))
9641 unqualified_id
= constructor_name (unqualified_id
);
9644 case IDENTIFIER_NODE
:
9645 case TEMPLATE_ID_EXPR
:
9653 if (declspecs
->std_attributes
)
9655 /* Apply the c++11 attributes to the type preceding them. */
9656 input_location
= declspecs
->locations
[ds_std_attribute
];
9657 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9658 input_location
= saved_loc
;
9661 /* Determine the type of the entity declared by recurring on the
9663 for (; declarator
; declarator
= declarator
->declarator
)
9665 const cp_declarator
*inner_declarator
;
9668 if (type
== error_mark_node
)
9669 return error_mark_node
;
9671 attrs
= declarator
->attributes
;
9677 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9678 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9679 if (declarator
->kind
== cdk_function
)
9680 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9681 if (declarator
->kind
== cdk_array
)
9682 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9683 returned_attrs
= decl_attributes (&type
,
9684 chainon (returned_attrs
, attrs
),
9688 if (declarator
->kind
== cdk_id
)
9691 inner_declarator
= declarator
->declarator
;
9693 switch (declarator
->kind
)
9696 type
= create_array_type_for_decl (dname
, type
,
9697 declarator
->u
.array
.bounds
);
9698 if (declarator
->std_attributes
)
9701 The optional attribute-specifier-seq appertains to the
9703 returned_attrs
= chainon (returned_attrs
,
9704 declarator
->std_attributes
);
9712 /* Declaring a function type.
9713 Make sure we have a valid type for the function to return. */
9715 if (type_quals
!= TYPE_UNQUALIFIED
)
9717 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9718 warning (OPT_Wignored_qualifiers
,
9719 "type qualifiers ignored on function return type");
9720 /* We now know that the TYPE_QUALS don't apply to the
9721 decl, but to its return type. */
9722 type_quals
= TYPE_UNQUALIFIED
;
9724 errmsg
= targetm
.invalid_return_type (type
);
9728 type
= integer_type_node
;
9731 /* Error about some types functions can't return. */
9733 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9735 error ("%qs declared as function returning a function", name
);
9736 return error_mark_node
;
9738 if (TREE_CODE (type
) == ARRAY_TYPE
)
9740 error ("%qs declared as function returning an array", name
);
9741 return error_mark_node
;
9744 input_location
= declspecs
->locations
[ds_type_spec
];
9745 abstract_virtuals_error (ACU_RETURN
, type
);
9746 input_location
= saved_loc
;
9748 /* Pick up type qualifiers which should be applied to `this'. */
9749 memfn_quals
= declarator
->u
.function
.qualifiers
;
9750 /* Pick up virt-specifiers. */
9751 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9752 /* And ref-qualifier, too */
9753 rqual
= declarator
->u
.function
.ref_qualifier
;
9754 /* Pick up the exception specifications. */
9755 raises
= declarator
->u
.function
.exception_specification
;
9756 /* If the exception-specification is ill-formed, let's pretend
9757 there wasn't one. */
9758 if (raises
== error_mark_node
)
9761 /* Say it's a definition only for the CALL_EXPR
9762 closest to the identifier. */
9763 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9765 /* Handle a late-specified return type. */
9768 if (type_uses_auto (type
))
9770 if (!declarator
->u
.function
.late_return_type
)
9772 if (current_class_type
9773 && LAMBDA_TYPE_P (current_class_type
))
9774 /* OK for C++11 lambdas. */;
9775 else if (cxx_dialect
< cxx14
)
9777 error ("%qs function uses "
9778 "%<auto%> type specifier without trailing "
9779 "return type", name
);
9780 inform (input_location
, "deduced return type "
9781 "only available with -std=c++14 or "
9786 error ("virtual function cannot "
9787 "have deduced return type");
9791 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
9793 error ("%qs function with trailing return type has"
9794 " %qT as its type rather than plain %<auto%>",
9796 return error_mark_node
;
9799 else if (declarator
->u
.function
.late_return_type
9800 && sfk
!= sfk_conversion
)
9802 if (cxx_dialect
< cxx11
)
9803 /* Not using maybe_warn_cpp0x because this should
9804 always be an error. */
9805 error ("trailing return type only available with "
9806 "-std=c++11 or -std=gnu++11");
9808 error ("%qs function with trailing return type not "
9809 "declared with %<auto%> type specifier", name
);
9810 return error_mark_node
;
9813 type
= splice_late_return_type
9814 (type
, declarator
->u
.function
.late_return_type
);
9815 if (type
== error_mark_node
)
9816 return error_mark_node
;
9818 if (declarator
->u
.function
.late_return_type
)
9819 late_return_type_p
= true;
9821 if (ctype
== NULL_TREE
9822 && decl_context
== FIELD
9825 ctype
= current_class_type
;
9827 if (ctype
&& (sfk
== sfk_constructor
9828 || sfk
== sfk_destructor
))
9830 /* We are within a class's scope. If our declarator name
9831 is the same as the class name, and we are defining
9832 a function, then it is a constructor/destructor, and
9833 therefore returns a void type. */
9835 /* ISO C++ 12.4/2. A destructor may not be declared
9836 const or volatile. A destructor may not be static.
9837 A destructor may not be declared with ref-qualifier.
9839 ISO C++ 12.1. A constructor may not be declared
9840 const or volatile. A constructor may not be
9841 virtual. A constructor may not be static.
9842 A constructor may not be declared with ref-qualifier. */
9844 error ((flags
== DTOR_FLAG
)
9845 ? G_("destructor cannot be static member function")
9846 : G_("constructor cannot be static member function"));
9849 error ((flags
== DTOR_FLAG
)
9850 ? G_("destructors may not be cv-qualified")
9851 : G_("constructors may not be cv-qualified"));
9852 memfn_quals
= TYPE_UNQUALIFIED
;
9857 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9858 error ((flags
== DTOR_FLAG
)
9859 ? "destructors may not be ref-qualified"
9860 : "constructors may not be ref-qualified");
9861 rqual
= REF_QUAL_NONE
;
9864 if (decl_context
== FIELD
9865 && !member_function_or_else (ctype
,
9868 return error_mark_node
;
9870 if (flags
!= DTOR_FLAG
)
9872 /* It's a constructor. */
9877 permerror (input_location
, "constructors cannot be declared virtual");
9880 if (decl_context
== FIELD
9881 && sfk
!= sfk_constructor
)
9882 return error_mark_node
;
9884 if (decl_context
== FIELD
)
9891 /* Cannot be both friend and virtual. */
9892 error ("virtual functions cannot be friends");
9895 if (decl_context
== NORMAL
)
9896 error ("friend declaration not in class definition");
9897 if (current_function_decl
&& funcdef_flag
)
9898 error ("can%'t define friend function %qs in a local "
9902 else if (ctype
&& sfk
== sfk_conversion
)
9906 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9909 if (late_return_type_p
)
9910 error ("a conversion function cannot have a trailing return type");
9913 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9916 if (inner_declarator
9917 && inner_declarator
->kind
== cdk_id
9918 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9919 && arg_types
!= void_list_node
)
9921 error ("destructors may not have parameters");
9922 arg_types
= void_list_node
;
9926 type
= build_function_type (type
, arg_types
);
9927 if (declarator
->std_attributes
)
9930 The optional attribute-specifier-seq appertains to
9931 the function type. */
9932 decl_attributes (&type
, declarator
->std_attributes
,
9940 /* Filter out pointers-to-references and references-to-references.
9941 We can get these if a TYPE_DECL is used. */
9943 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9945 if (declarator
->kind
!= cdk_reference
)
9947 error ("cannot declare pointer to %q#T", type
);
9948 type
= TREE_TYPE (type
);
9951 /* In C++0x, we allow reference to reference declarations
9952 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9953 and template type arguments [14.3.1/4 temp.arg.type]. The
9954 check for direct reference to reference declarations, which
9955 are still forbidden, occurs below. Reasoning behind the change
9956 can be found in DR106, DR540, and the rvalue reference
9958 else if (cxx_dialect
== cxx98
)
9960 error ("cannot declare reference to %q#T", type
);
9961 type
= TREE_TYPE (type
);
9964 else if (VOID_TYPE_P (type
))
9966 if (declarator
->kind
== cdk_reference
)
9967 error ("cannot declare reference to %q#T", type
);
9968 else if (declarator
->kind
== cdk_ptrmem
)
9969 error ("cannot declare pointer to %q#T member", type
);
9972 /* We now know that the TYPE_QUALS don't apply to the decl,
9973 but to the target of the pointer. */
9974 type_quals
= TYPE_UNQUALIFIED
;
9976 /* This code used to handle METHOD_TYPE, but I don't think it's
9977 possible to get it here anymore. */
9978 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9979 if (declarator
->kind
== cdk_ptrmem
9980 && TREE_CODE (type
) == FUNCTION_TYPE
)
9982 memfn_quals
|= type_memfn_quals (type
);
9983 type
= build_memfn_type (type
,
9984 declarator
->u
.pointer
.class_type
,
9987 if (type
== error_mark_node
)
9988 return error_mark_node
;
9990 rqual
= REF_QUAL_NONE
;
9991 memfn_quals
= TYPE_UNQUALIFIED
;
9994 if (TREE_CODE (type
) == FUNCTION_TYPE
9995 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9996 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9997 error (declarator
->kind
== cdk_reference
9998 ? G_("cannot declare reference to qualified function type %qT")
9999 : G_("cannot declare pointer to qualified function type %qT"),
10002 /* When the pointed-to type involves components of variable size,
10003 care must be taken to ensure that the size evaluation code is
10004 emitted early enough to dominate all the possible later uses
10005 and late enough for the variables on which it depends to have
10008 This is expected to happen automatically when the pointed-to
10009 type has a name/declaration of it's own, but special attention
10010 is required if the type is anonymous.
10012 We handle the NORMAL and FIELD contexts here by inserting a
10013 dummy statement that just evaluates the size at a safe point
10014 and ensures it is not deferred until e.g. within a deeper
10015 conditional context (c++/43555).
10017 We expect nothing to be needed here for PARM or TYPENAME.
10018 Evaluating the size at this point for TYPENAME would
10019 actually be incorrect, as we might be in the middle of an
10020 expression with side effects on the pointed-to type size
10021 "arguments" prior to the pointer declaration point and the
10022 size evaluation could end up prior to the side effects. */
10024 if (!TYPE_NAME (type
)
10025 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10026 && at_function_scope_p ()
10027 && variably_modified_type_p (type
, NULL_TREE
))
10028 /* Force evaluation of the SAVE_EXPR. */
10029 finish_expr_stmt (TYPE_SIZE (type
));
10031 if (declarator
->kind
== cdk_reference
)
10033 /* In C++0x, the type we are creating a reference to might be
10034 a typedef which is itself a reference type. In that case,
10035 we follow the reference collapsing rules in
10036 [7.1.3/8 dcl.typedef] to create the final reference type:
10038 "If a typedef TD names a type that is a reference to a type
10039 T, an attempt to create the type 'lvalue reference to cv TD'
10040 creates the type 'lvalue reference to T,' while an attempt
10041 to create the type "rvalue reference to cv TD' creates the
10044 if (VOID_TYPE_P (type
))
10045 /* We already gave an error. */;
10046 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10048 if (declarator
->u
.reference
.rvalue_ref
)
10049 /* Leave type alone. */;
10051 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10054 type
= cp_build_reference_type
10055 (type
, declarator
->u
.reference
.rvalue_ref
);
10057 /* In C++0x, we need this check for direct reference to
10058 reference declarations, which are forbidden by
10059 [8.3.2/5 dcl.ref]. Reference to reference declarations
10060 are only allowed indirectly through typedefs and template
10061 type arguments. Example:
10063 void foo(int & &); // invalid ref-to-ref decl
10065 typedef int & int_ref;
10066 void foo(int_ref &); // valid ref-to-ref decl
10068 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10069 error ("cannot declare reference to %q#T, which is not "
10070 "a typedef or a template type argument", type
);
10072 else if (TREE_CODE (type
) == METHOD_TYPE
)
10073 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10074 else if (declarator
->kind
== cdk_ptrmem
)
10076 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10077 != NAMESPACE_DECL
);
10078 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10079 /* We will already have complained. */
10080 type
= error_mark_node
;
10082 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10086 type
= build_pointer_type (type
);
10088 /* Process a list of type modifier keywords (such as
10089 const or volatile) that were given inside the `*' or `&'. */
10091 if (declarator
->u
.pointer
.qualifiers
)
10094 = cp_build_qualified_type (type
,
10095 declarator
->u
.pointer
.qualifiers
);
10096 type_quals
= cp_type_quals (type
);
10099 /* Apply C++11 attributes to the pointer, and not to the
10100 type pointed to. This is unlike what is done for GNU
10101 attributes above. It is to comply with [dcl.ptr]/1:
10103 [the optional attribute-specifier-seq (7.6.1) appertains
10104 to the pointer and not to the object pointed to]. */
10105 if (declarator
->std_attributes
)
10106 decl_attributes (&type
, declarator
->std_attributes
,
10116 gcc_unreachable ();
10120 /* A `constexpr' specifier used in an object declaration declares
10121 the object as `const'. */
10122 if (constexpr_p
&& innermost_code
!= cdk_function
)
10124 /* DR1688 says that a `constexpr' specifier in combination with
10125 `volatile' is valid. */
10127 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10129 type_quals
|= TYPE_QUAL_CONST
;
10130 type
= cp_build_qualified_type (type
, type_quals
);
10134 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10135 && TREE_CODE (type
) != FUNCTION_TYPE
10136 && TREE_CODE (type
) != METHOD_TYPE
10137 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10139 error ("template-id %qD used as a declarator",
10141 unqualified_id
= dname
;
10144 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10145 qualified with a class-name, turn it into a METHOD_TYPE, unless
10146 we know that the function is static. We take advantage of this
10147 opportunity to do other processing that pertains to entities
10148 explicitly declared to be class members. Note that if DECLARATOR
10149 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10150 would not have exited the loop above. */
10152 && declarator
->u
.id
.qualifying_scope
10153 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10155 ctype
= declarator
->u
.id
.qualifying_scope
;
10156 ctype
= TYPE_MAIN_VARIANT (ctype
);
10157 template_count
= num_template_headers_for_class (ctype
);
10159 if (ctype
== current_class_type
)
10163 permerror (input_location
, "member functions are implicitly friends of their class");
10167 permerror (declarator
->id_loc
,
10168 "extra qualification %<%T::%> on member %qs",
10171 else if (/* If the qualifying type is already complete, then we
10172 can skip the following checks. */
10173 !COMPLETE_TYPE_P (ctype
)
10174 && (/* If the function is being defined, then
10175 qualifying type must certainly be complete. */
10177 /* A friend declaration of "T::f" is OK, even if
10178 "T" is a template parameter. But, if this
10179 function is not a friend, the qualifying type
10180 must be a class. */
10181 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10182 /* For a declaration, the type need not be
10183 complete, if either it is dependent (since there
10184 is no meaningful definition of complete in that
10185 case) or the qualifying class is currently being
10187 || !(dependent_type_p (ctype
)
10188 || currently_open_class (ctype
)))
10189 /* Check that the qualifying type is complete. */
10190 && !complete_type_or_else (ctype
, NULL_TREE
))
10191 return error_mark_node
;
10192 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10194 if (current_class_type
10195 && (!friendp
|| funcdef_flag
))
10197 error (funcdef_flag
10198 ? G_("cannot define member function %<%T::%s%> "
10200 : G_("cannot declare member function %<%T::%s%> "
10202 ctype
, name
, current_class_type
);
10203 return error_mark_node
;
10206 else if (typedef_p
&& current_class_type
)
10208 error ("cannot declare member %<%T::%s%> within %qT",
10209 ctype
, name
, current_class_type
);
10210 return error_mark_node
;
10214 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10215 ctype
= current_class_type
;
10217 /* Now TYPE has the actual type. */
10219 if (returned_attrs
)
10222 *attrlist
= chainon (returned_attrs
, *attrlist
);
10224 attrlist
= &returned_attrs
;
10228 && declarator
->kind
== cdk_id
10229 && declarator
->std_attributes
)
10230 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10231 a declarator-id appertains to the entity that is declared. */
10232 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10234 /* Handle parameter packs. */
10235 if (parameter_pack_p
)
10237 if (decl_context
== PARM
)
10238 /* Turn the type into a pack expansion.*/
10239 type
= make_pack_expansion (type
);
10241 error ("non-parameter %qs cannot be a parameter pack", name
);
10244 /* Did array size calculations overflow or does the array cover more
10245 than half of the address-space? */
10246 if (TREE_CODE (type
) == ARRAY_TYPE
10247 && COMPLETE_TYPE_P (type
)
10248 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10249 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10251 error ("size of array %qs is too large", name
);
10252 /* If we proceed with the array type as it is, we'll eventually
10253 crash in tree_to_[su]hwi(). */
10254 type
= error_mark_node
;
10257 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10258 && !processing_template_decl
10259 && variably_modified_type_p (type
, NULL_TREE
))
10261 if (decl_context
== FIELD
)
10262 error ("data member may not have variably modified type %qT", type
);
10264 error ("parameter may not have variably modified type %qT", type
);
10265 type
= error_mark_node
;
10268 if (explicitp
== 1 || (explicitp
&& friendp
))
10270 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10271 in the declaration of a constructor or conversion function within
10272 a class definition. */
10273 if (!current_class_type
)
10274 error_at (declspecs
->locations
[ds_explicit
],
10275 "%<explicit%> outside class declaration");
10277 error_at (declspecs
->locations
[ds_explicit
],
10278 "%<explicit%> in friend declaration");
10280 error_at (declspecs
->locations
[ds_explicit
],
10281 "only declarations of constructors and conversion operators "
10282 "can be %<explicit%>");
10286 if (storage_class
== sc_mutable
)
10288 if (decl_context
!= FIELD
|| friendp
)
10290 error ("non-member %qs cannot be declared %<mutable%>", name
);
10291 storage_class
= sc_none
;
10293 else if (decl_context
== TYPENAME
|| typedef_p
)
10295 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10296 storage_class
= sc_none
;
10298 else if (TREE_CODE (type
) == FUNCTION_TYPE
10299 || TREE_CODE (type
) == METHOD_TYPE
)
10301 error ("function %qs cannot be declared %<mutable%>", name
);
10302 storage_class
= sc_none
;
10306 error ("static %qs cannot be declared %<mutable%>", name
);
10307 storage_class
= sc_none
;
10309 else if (type_quals
& TYPE_QUAL_CONST
)
10311 error ("const %qs cannot be declared %<mutable%>", name
);
10312 storage_class
= sc_none
;
10314 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10316 permerror (input_location
, "reference %qs cannot be declared "
10317 "%<mutable%>", name
);
10318 storage_class
= sc_none
;
10322 /* If this is declaring a typedef name, return a TYPE_DECL. */
10323 if (typedef_p
&& decl_context
!= TYPENAME
)
10327 /* Note that the grammar rejects storage classes
10328 in typenames, fields or parameters. */
10329 if (current_lang_name
== lang_name_java
)
10330 TYPE_FOR_JAVA (type
) = 1;
10332 /* This declaration:
10334 typedef void f(int) const;
10336 declares a function type which is not a member of any
10337 particular class, but which is cv-qualified; for
10338 example "f S::*" declares a pointer to a const-qualified
10339 member function of S. We record the cv-qualification in the
10341 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10343 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10345 /* We have now dealt with these qualifiers. */
10346 memfn_quals
= TYPE_UNQUALIFIED
;
10347 rqual
= REF_QUAL_NONE
;
10350 if (type_uses_auto (type
))
10352 error ("typedef declared %<auto%>");
10353 type
= error_mark_node
;
10356 if (decl_context
== FIELD
)
10357 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10359 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10360 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10361 error_at (DECL_SOURCE_LOCATION (decl
),
10362 "typedef name may not be a nested-name-specifier");
10363 TREE_TYPE (decl
) = error_mark_node
;
10366 if (decl_context
!= FIELD
)
10368 if (!current_function_decl
)
10369 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10370 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10371 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10372 (current_function_decl
)))
10373 /* The TYPE_DECL is "abstract" because there will be
10374 clones of this constructor/destructor, and there will
10375 be copies of this TYPE_DECL generated in those
10376 clones. The decloning optimization (for space) may
10377 revert this subsequently if it determines that
10378 the clones should share a common implementation. */
10379 DECL_ABSTRACT_P (decl
) = true;
10381 else if (current_class_type
10382 && constructor_name_p (unqualified_id
, current_class_type
))
10383 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10384 "as enclosing class",
10387 /* If the user declares "typedef struct {...} foo" then the
10388 struct will have an anonymous name. Fill that name in now.
10389 Nothing can refer to it, so nothing needs know about the name
10391 if (type
!= error_mark_node
10393 && TYPE_NAME (type
)
10394 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10395 && TYPE_ANONYMOUS_P (type
)
10396 && declspecs
->type_definition_p
10397 && attributes_naming_typedef_ok (*attrlist
)
10398 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10402 /* Replace the anonymous name with the real name everywhere. */
10403 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10405 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10406 /* We do not rename the debug info representing the
10407 anonymous tagged type because the standard says in
10408 [dcl.typedef] that the naming applies only for
10409 linkage purposes. */
10410 /*debug_hooks->set_name (t, decl);*/
10411 TYPE_NAME (t
) = decl
;
10414 if (TYPE_LANG_SPECIFIC (type
))
10415 TYPE_WAS_ANONYMOUS (type
) = 1;
10417 /* If this is a typedef within a template class, the nested
10418 type is a (non-primary) template. The name for the
10419 template needs updating as well. */
10420 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10421 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10422 = TYPE_IDENTIFIER (type
);
10424 /* Adjust linkage now that we aren't anonymous anymore. */
10425 reset_type_linkage (type
);
10427 /* FIXME remangle member functions; member functions of a
10428 type with external linkage have external linkage. */
10432 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10433 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10435 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10436 memfn_quals
!= TYPE_UNQUALIFIED
,
10437 inlinep
, friendp
, raises
!= NULL_TREE
);
10439 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10440 /* Acknowledge that this was written:
10441 `using analias = atype;'. */
10442 TYPE_DECL_ALIAS_P (decl
) = 1;
10447 /* Detect the case of an array type of unspecified size
10448 which came, as such, direct from a typedef name.
10449 We must copy the type, so that the array's domain can be
10450 individually set by the object's initializer. */
10452 if (type
&& typedef_type
10453 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10454 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10455 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10457 /* Detect where we're using a typedef of function type to declare a
10458 function. PARMS will not be set, so we must create it now. */
10460 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10462 tree decls
= NULL_TREE
;
10465 for (args
= TYPE_ARG_TYPES (type
);
10466 args
&& args
!= void_list_node
;
10467 args
= TREE_CHAIN (args
))
10469 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10471 DECL_CHAIN (decl
) = decls
;
10475 parms
= nreverse (decls
);
10477 if (decl_context
!= TYPENAME
)
10479 /* The qualifiers on the function type become the qualifiers on
10480 the non-static member function. */
10481 memfn_quals
|= type_memfn_quals (type
);
10482 rqual
= type_memfn_rqual (type
);
10483 type_quals
= TYPE_UNQUALIFIED
;
10487 /* If this is a type name (such as, in a cast or sizeof),
10488 compute the type and return it now. */
10490 if (decl_context
== TYPENAME
)
10492 /* Note that the grammar rejects storage classes
10493 in typenames, fields or parameters. */
10494 if (type_quals
!= TYPE_UNQUALIFIED
)
10495 type_quals
= TYPE_UNQUALIFIED
;
10497 /* Special case: "friend class foo" looks like a TYPENAME context. */
10500 if (type_quals
!= TYPE_UNQUALIFIED
)
10502 error ("type qualifiers specified for friend class declaration");
10503 type_quals
= TYPE_UNQUALIFIED
;
10507 error ("%<inline%> specified for friend class declaration");
10513 /* Don't allow friend declaration without a class-key. */
10514 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10515 permerror (input_location
, "template parameters cannot be friends");
10516 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10517 permerror (input_location
, "friend declaration requires class-key, "
10518 "i.e. %<friend class %T::%D%>",
10519 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10521 permerror (input_location
, "friend declaration requires class-key, "
10522 "i.e. %<friend %#T%>",
10526 /* Only try to do this stuff if we didn't already give up. */
10527 if (type
!= integer_type_node
)
10529 /* A friendly class? */
10530 if (current_class_type
)
10531 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10532 /*complain=*/true);
10534 error ("trying to make class %qT a friend of global scope",
10537 type
= void_type_node
;
10540 else if (memfn_quals
|| rqual
)
10542 if (ctype
== NULL_TREE
10543 && TREE_CODE (type
) == METHOD_TYPE
)
10544 ctype
= TYPE_METHOD_BASETYPE (type
);
10547 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10548 /* Core issue #547: need to allow this in template type args.
10549 Allow it in general in C++11 for alias-declarations. */
10550 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10551 && TREE_CODE (type
) == FUNCTION_TYPE
)
10552 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10554 error ("invalid qualifiers on non-member function type");
10559 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10560 && decl_context
!= CATCHPARM
10561 && TREE_CODE (type
) != UNION_TYPE
10564 error ("abstract declarator %qT used as declaration", type
);
10565 return error_mark_node
;
10568 /* Only functions may be declared using an operator-function-id. */
10570 && IDENTIFIER_OPNAME_P (unqualified_id
)
10571 && TREE_CODE (type
) != FUNCTION_TYPE
10572 && TREE_CODE (type
) != METHOD_TYPE
)
10574 error ("declaration of %qD as non-function", unqualified_id
);
10575 return error_mark_node
;
10578 /* We don't check parameter types here because we can emit a better
10579 error message later. */
10580 if (decl_context
!= PARM
)
10582 type
= check_var_type (unqualified_id
, type
);
10583 if (type
== error_mark_node
)
10584 return error_mark_node
;
10587 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10588 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10590 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10592 if (ctype
|| in_namespace
)
10593 error ("cannot use %<::%> in parameter declaration");
10595 if (type_uses_auto (type
))
10597 if (cxx_dialect
>= cxx14
)
10598 error ("%<auto%> parameter not permitted in this context");
10600 error ("parameter declared %<auto%>");
10601 type
= error_mark_node
;
10604 /* A parameter declared as an array of T is really a pointer to T.
10605 One declared as a function is really a pointer to a function.
10606 One declared as a member is really a pointer to member. */
10608 if (TREE_CODE (type
) == ARRAY_TYPE
)
10610 /* Transfer const-ness of array into that of type pointed to. */
10611 type
= build_pointer_type (TREE_TYPE (type
));
10612 type_quals
= TYPE_UNQUALIFIED
;
10613 array_parameter_p
= true;
10615 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10616 type
= build_pointer_type (type
);
10619 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10620 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10622 cp_cv_quals real_quals
= memfn_quals
;
10623 if (cxx_dialect
< cxx14
&& constexpr_p
10624 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10625 real_quals
|= TYPE_QUAL_CONST
;
10626 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10632 if (decl_context
== PARM
)
10634 decl
= cp_build_parm_decl (unqualified_id
, type
);
10635 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10637 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10638 memfn_quals
!= TYPE_UNQUALIFIED
,
10639 inlinep
, friendp
, raises
!= NULL_TREE
);
10641 else if (decl_context
== FIELD
)
10643 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10644 && type_uses_auto (type
))
10646 error ("non-static data member declared %<auto%>");
10647 type
= error_mark_node
;
10650 /* The C99 flexible array extension. */
10651 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10652 && TYPE_DOMAIN (type
) == NULL_TREE
)
10654 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10655 tf_warning_or_error
);
10656 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10659 if (type
== error_mark_node
)
10661 /* Happens when declaring arrays of sizes which
10662 are error_mark_node, for example. */
10665 else if (in_namespace
&& !friendp
)
10667 /* Something like struct S { int N::j; }; */
10668 error ("invalid use of %<::%>");
10669 return error_mark_node
;
10671 else if (TREE_CODE (type
) == FUNCTION_TYPE
10672 || TREE_CODE (type
) == METHOD_TYPE
)
10675 tree function_context
;
10679 /* This should never happen in pure C++ (the check
10680 could be an assert). It could happen in
10681 Objective-C++ if someone writes invalid code that
10682 uses a function declaration for an instance
10683 variable or property (instance variables and
10684 properties are parsed as FIELD_DECLs, but they are
10685 part of an Objective-C class, not a C++ class).
10686 That code is invalid and is caught by this
10690 error ("declaration of function %qD in invalid context",
10692 return error_mark_node
;
10695 /* ``A union may [ ... ] not [ have ] virtual functions.''
10697 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10699 error ("function %qD declared virtual inside a union",
10701 return error_mark_node
;
10704 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10708 error ("%qD cannot be declared virtual, since it "
10709 "is always static",
10716 /* Check that the name used for a destructor makes sense. */
10717 if (sfk
== sfk_destructor
)
10719 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10723 gcc_assert (friendp
);
10724 error ("expected qualified name in friend declaration "
10725 "for destructor %qD", uqname
);
10726 return error_mark_node
;
10729 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10731 error ("declaration of %qD as member of %qT",
10733 return error_mark_node
;
10737 error ("a destructor cannot be %<constexpr%>");
10738 return error_mark_node
;
10741 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10743 error ("expected qualified name in friend declaration "
10744 "for constructor %qD",
10745 id_declarator
->u
.id
.unqualified_name
);
10746 return error_mark_node
;
10749 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10751 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10752 if (variable_template_p (tmpl
))
10754 error ("specialization of variable template %qD "
10755 "declared as function", tmpl
);
10756 inform (DECL_SOURCE_LOCATION (tmpl
),
10757 "variable template declared here");
10758 return error_mark_node
;
10762 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10763 function_context
= (ctype
!= NULL_TREE
) ?
10764 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10765 publicp
= (! friendp
|| ! staticp
)
10766 && function_context
== NULL_TREE
;
10768 if (late_return_type_p
)
10769 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10771 decl
= grokfndecl (ctype
, type
,
10772 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10773 ? unqualified_id
: dname
,
10776 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10777 friendp
? -1 : 0, friendp
, publicp
,
10778 inlinep
| (2 * constexpr_p
),
10779 initialized
== SD_DELETED
, sfk
,
10780 funcdef_flag
, template_count
, in_namespace
,
10781 attrlist
, declarator
->id_loc
);
10782 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10783 if (decl
== NULL_TREE
)
10784 return error_mark_node
;
10786 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10787 /* The decl and setting of decl_attr is also turned off. */
10788 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10791 /* [class.conv.ctor]
10793 A constructor declared without the function-specifier
10794 explicit that can be called with a single parameter
10795 specifies a conversion from the type of its first
10796 parameter to the type of its class. Such a constructor
10797 is called a converting constructor. */
10798 if (explicitp
== 2)
10799 DECL_NONCONVERTING_P (decl
) = 1;
10801 else if (!staticp
&& !dependent_type_p (type
)
10802 && !COMPLETE_TYPE_P (complete_type (type
))
10803 && (TREE_CODE (type
) != ARRAY_TYPE
10804 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10805 || initialized
== 0))
10807 if (unqualified_id
)
10809 error ("field %qD has incomplete type %qT",
10810 unqualified_id
, type
);
10811 cxx_incomplete_type_inform (strip_array_types (type
));
10814 error ("name %qT has incomplete type", type
);
10816 type
= error_mark_node
;
10823 error ("%qE is neither function nor member function; "
10824 "cannot be declared friend", unqualified_id
);
10832 /* Friends are treated specially. */
10833 if (ctype
== current_class_type
)
10834 ; /* We already issued a permerror. */
10835 else if (decl
&& DECL_NAME (decl
))
10837 if (template_class_depth (current_class_type
) == 0)
10839 decl
= check_explicit_specialization
10840 (unqualified_id
, decl
, template_count
,
10841 2 * funcdef_flag
+ 4);
10842 if (decl
== error_mark_node
)
10843 return error_mark_node
;
10846 decl
= do_friend (ctype
, unqualified_id
, decl
,
10852 return error_mark_node
;
10855 /* Structure field. It may not be a function, except for C++. */
10857 if (decl
== NULL_TREE
)
10861 /* C++ allows static class members. All other work
10862 for this is done by grokfield. */
10863 decl
= build_lang_decl_loc (declarator
10864 ? declarator
->id_loc
10866 VAR_DECL
, unqualified_id
, type
);
10867 set_linkage_for_static_data_member (decl
);
10868 /* Even if there is an in-class initialization, DECL
10869 is considered undefined until an out-of-class
10870 definition is provided. */
10871 DECL_EXTERNAL (decl
) = 1;
10875 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10876 if (declspecs
->gnu_thread_keyword_p
)
10877 DECL_GNU_TLS_P (decl
) = true;
10880 if (constexpr_p
&& !initialized
)
10882 error ("constexpr static data member %qD must have an "
10883 "initializer", decl
);
10884 constexpr_p
= false;
10891 error ("non-static data member %qE declared %<constexpr%>",
10893 constexpr_p
= false;
10895 decl
= build_decl (input_location
,
10896 FIELD_DECL
, unqualified_id
, type
);
10897 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10898 if (bitfield
&& !unqualified_id
)
10899 TREE_NO_WARNING (decl
) = 1;
10901 if (storage_class
== sc_mutable
)
10903 DECL_MUTABLE_P (decl
) = 1;
10904 storage_class
= sc_none
;
10909 /* An attempt is being made to initialize a non-static
10910 member. This is new in C++11. */
10911 maybe_warn_cpp0x (CPP0X_NSDMI
);
10913 /* If this has been parsed with static storage class, but
10914 errors forced staticp to be cleared, ensure NSDMI is
10916 if (declspecs
->storage_class
== sc_static
)
10917 DECL_INITIAL (decl
) = error_mark_node
;
10921 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10922 memfn_quals
!= TYPE_UNQUALIFIED
,
10923 inlinep
, friendp
, raises
!= NULL_TREE
);
10926 else if (TREE_CODE (type
) == FUNCTION_TYPE
10927 || TREE_CODE (type
) == METHOD_TYPE
)
10929 tree original_name
;
10932 if (!unqualified_id
)
10933 return error_mark_node
;
10935 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10936 original_name
= dname
;
10938 original_name
= unqualified_id
;
10940 if (storage_class
== sc_auto
)
10941 error ("storage class %<auto%> invalid for function %qs", name
);
10942 else if (storage_class
== sc_register
)
10943 error ("storage class %<register%> invalid for function %qs", name
);
10946 if (declspecs
->gnu_thread_keyword_p
)
10947 error ("storage class %<__thread%> invalid for function %qs",
10950 error ("storage class %<thread_local%> invalid for function %qs",
10954 if (virt_specifiers
)
10955 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10956 /* Function declaration not at top level.
10957 Storage classes other than `extern' are not allowed
10958 and `extern' makes no difference. */
10959 if (! toplevel_bindings_p ()
10960 && (storage_class
== sc_static
10961 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10964 if (storage_class
== sc_static
)
10965 pedwarn (input_location
, OPT_Wpedantic
,
10966 "%<static%> specified invalid for function %qs "
10967 "declared out of global scope", name
);
10969 pedwarn (input_location
, OPT_Wpedantic
,
10970 "%<inline%> specifier invalid for function %qs "
10971 "declared out of global scope", name
);
10974 if (ctype
== NULL_TREE
)
10978 error ("virtual non-class function %qs", name
);
10981 else if (sfk
== sfk_constructor
10982 || sfk
== sfk_destructor
)
10984 error (funcdef_flag
10985 ? G_("%qs defined in a non-class scope")
10986 : G_("%qs declared in a non-class scope"), name
);
10991 /* Record whether the function is public. */
10992 publicp
= (ctype
!= NULL_TREE
10993 || storage_class
!= sc_static
);
10995 if (late_return_type_p
)
10996 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10998 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10999 virtualp
, flags
, memfn_quals
, rqual
, raises
,
11001 publicp
, inlinep
| (2 * constexpr_p
),
11002 initialized
== SD_DELETED
, sfk
,
11004 template_count
, in_namespace
, attrlist
,
11005 declarator
->id_loc
);
11006 if (decl
== NULL_TREE
)
11007 return error_mark_node
;
11011 int invalid_static
= 0;
11013 /* Don't allow a static member function in a class, and forbid
11014 declaring main to be static. */
11015 if (TREE_CODE (type
) == METHOD_TYPE
)
11017 permerror (input_location
, "cannot declare member function %qD to have "
11018 "static linkage", decl
);
11019 invalid_static
= 1;
11021 else if (current_function_decl
)
11023 /* FIXME need arm citation */
11024 error ("cannot declare static function inside another function");
11025 invalid_static
= 1;
11028 if (invalid_static
)
11031 storage_class
= sc_none
;
11037 /* It's a variable. */
11039 /* An uninitialized decl with `extern' is a reference. */
11040 decl
= grokvardecl (type
, dname
, unqualified_id
,
11043 (type_quals
& TYPE_QUAL_CONST
) != 0,
11045 ctype
? ctype
: in_namespace
);
11046 if (decl
== NULL_TREE
)
11047 return error_mark_node
;
11049 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11050 memfn_quals
!= TYPE_UNQUALIFIED
,
11051 inlinep
, friendp
, raises
!= NULL_TREE
);
11055 DECL_CONTEXT (decl
) = ctype
;
11058 permerror (input_location
, "%<static%> may not be used when defining "
11059 "(as opposed to declaring) a static data member");
11061 storage_class
= sc_none
;
11063 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11065 error ("static member %qD declared %<register%>", decl
);
11066 storage_class
= sc_none
;
11068 if (storage_class
== sc_extern
&& pedantic
)
11070 pedwarn (input_location
, OPT_Wpedantic
,
11071 "cannot explicitly declare member %q#D to have "
11072 "extern linkage", decl
);
11073 storage_class
= sc_none
;
11076 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11078 error ("declaration of constexpr variable %qD is not a definition",
11080 constexpr_p
= false;
11084 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11086 if (toplevel_bindings_p ())
11088 /* It's common practice (and completely valid) to have a const
11089 be initialized and declared extern. */
11090 if (!(type_quals
& TYPE_QUAL_CONST
))
11091 warning (0, "%qs initialized and declared %<extern%>", name
);
11095 error ("%qs has both %<extern%> and initializer", name
);
11096 return error_mark_node
;
11100 /* Record `register' declaration for warnings on &
11101 and in case doing stupid register allocation. */
11103 if (storage_class
== sc_register
)
11104 DECL_REGISTER (decl
) = 1;
11105 else if (storage_class
== sc_extern
)
11106 DECL_THIS_EXTERN (decl
) = 1;
11107 else if (storage_class
== sc_static
)
11108 DECL_THIS_STATIC (decl
) = 1;
11110 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11111 if (constexpr_p
&& VAR_P (decl
))
11112 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11114 /* Record constancy and volatility on the DECL itself . There's
11115 no need to do this when processing a template; we'll do this
11116 for the instantiated declaration based on the type of DECL. */
11117 if (!processing_template_decl
)
11118 cp_apply_type_quals_to_decl (type_quals
, decl
);
11124 /* Subroutine of start_function. Ensure that each of the parameter
11125 types (as listed in PARMS) is complete, as is required for a
11126 function definition. */
11129 require_complete_types_for_parms (tree parms
)
11131 for (; parms
; parms
= DECL_CHAIN (parms
))
11133 if (dependent_type_p (TREE_TYPE (parms
)))
11135 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11136 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11138 relayout_decl (parms
);
11139 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11142 /* grokparms or complete_type_or_else will have already issued
11144 TREE_TYPE (parms
) = error_mark_node
;
11148 /* Returns nonzero if T is a local variable. */
11151 local_variable_p (const_tree t
)
11154 /* A VAR_DECL with a context that is a _TYPE is a static data
11156 && !TYPE_P (CP_DECL_CONTEXT (t
))
11157 /* Any other non-local variable must be at namespace scope. */
11158 && !DECL_NAMESPACE_SCOPE_P (t
))
11159 || (TREE_CODE (t
) == PARM_DECL
))
11165 /* Like local_variable_p, but suitable for use as a tree-walking
11169 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11172 if (local_variable_p (*tp
)
11173 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11175 else if (TYPE_P (*tp
))
11176 *walk_subtrees
= 0;
11181 /* Check that ARG, which is a default-argument expression for a
11182 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11183 something goes wrong. DECL may also be a _TYPE node, rather than a
11184 DECL, if there is no DECL available. */
11187 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11192 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11193 /* We get a DEFAULT_ARG when looking at an in-class declaration
11194 with a default argument. Ignore the argument for now; we'll
11195 deal with it after the class is complete. */
11204 decl_type
= TREE_TYPE (decl
);
11206 if (arg
== error_mark_node
11207 || decl
== error_mark_node
11208 || TREE_TYPE (arg
) == error_mark_node
11209 || decl_type
== error_mark_node
)
11210 /* Something already went wrong. There's no need to check
11212 return error_mark_node
;
11214 /* [dcl.fct.default]
11216 A default argument expression is implicitly converted to the
11218 ++cp_unevaluated_operand
;
11219 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11221 --cp_unevaluated_operand
;
11223 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11225 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11226 && null_ptr_cst_p (arg
))
11227 return nullptr_node
;
11229 /* [dcl.fct.default]
11231 Local variables shall not be used in default argument
11234 The keyword `this' shall not be used in a default argument of a
11235 member function. */
11236 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11239 if (complain
& tf_warning_or_error
)
11241 if (DECL_NAME (var
) == this_identifier
)
11242 permerror (input_location
, "default argument %qE uses %qD",
11245 error ("default argument %qE uses local variable %qD", arg
, var
);
11247 return error_mark_node
;
11254 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11257 type_is_deprecated (tree type
)
11259 enum tree_code code
;
11260 if (TREE_DEPRECATED (type
))
11262 if (TYPE_NAME (type
)
11263 && TREE_DEPRECATED (TYPE_NAME (type
)))
11266 /* Do warn about using typedefs to a deprecated class. */
11267 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11268 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11270 code
= TREE_CODE (type
);
11272 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11273 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11274 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11275 return type_is_deprecated (TREE_TYPE (type
));
11277 if (TYPE_PTRMEMFUNC_P (type
))
11278 return type_is_deprecated
11279 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11284 /* Decode the list of parameter types for a function type.
11285 Given the list of things declared inside the parens,
11286 return a list of types.
11288 If this parameter does not end with an ellipsis, we append
11291 *PARMS is set to the chain of PARM_DECLs created. */
11294 grokparms (tree parmlist
, tree
*parms
)
11296 tree result
= NULL_TREE
;
11297 tree decls
= NULL_TREE
;
11301 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11303 tree type
= NULL_TREE
;
11304 tree init
= TREE_PURPOSE (parm
);
11305 tree decl
= TREE_VALUE (parm
);
11306 const char *errmsg
;
11308 if (parm
== void_list_node
)
11311 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11314 type
= TREE_TYPE (decl
);
11315 if (VOID_TYPE_P (type
))
11317 if (same_type_p (type
, void_type_node
)
11319 && !DECL_NAME (decl
) && !result
11320 && TREE_CHAIN (parm
) == void_list_node
)
11321 /* DR 577: A parameter list consisting of a single
11322 unnamed parameter of non-dependent type 'void'. */
11324 else if (cv_qualified_p (type
))
11325 error_at (DECL_SOURCE_LOCATION (decl
),
11326 "invalid use of cv-qualified type %qT in "
11327 "parameter declaration", type
);
11329 error_at (DECL_SOURCE_LOCATION (decl
),
11330 "invalid use of type %<void%> in parameter "
11332 /* It's not a good idea to actually create parameters of
11333 type `void'; other parts of the compiler assume that a
11334 void type terminates the parameter list. */
11335 type
= error_mark_node
;
11336 TREE_TYPE (decl
) = error_mark_node
;
11339 if (type
!= error_mark_node
11340 && TYPE_FOR_JAVA (type
)
11341 && MAYBE_CLASS_TYPE_P (type
))
11343 error ("parameter %qD has Java class type", decl
);
11344 type
= error_mark_node
;
11345 TREE_TYPE (decl
) = error_mark_node
;
11349 if (type
!= error_mark_node
11350 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11353 type
= error_mark_node
;
11354 TREE_TYPE (decl
) = error_mark_node
;
11357 if (type
!= error_mark_node
)
11359 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11361 tree deptype
= type_is_deprecated (type
);
11363 warn_deprecated_use (deptype
, NULL_TREE
);
11366 /* Top-level qualifiers on the parameters are
11367 ignored for function types. */
11368 type
= cp_build_qualified_type (type
, 0);
11369 if (TREE_CODE (type
) == METHOD_TYPE
)
11371 error ("parameter %qD invalidly declared method type", decl
);
11372 type
= build_pointer_type (type
);
11373 TREE_TYPE (decl
) = type
;
11375 else if (abstract_virtuals_error (decl
, type
))
11376 any_error
= 1; /* Seems like a good idea. */
11377 else if (POINTER_TYPE_P (type
))
11379 /* [dcl.fct]/6, parameter types cannot contain pointers
11380 (references) to arrays of unknown bound. */
11381 tree t
= TREE_TYPE (type
);
11382 int ptr
= TYPE_PTR_P (type
);
11386 if (TYPE_PTR_P (t
))
11388 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11390 else if (!TYPE_DOMAIN (t
))
11394 if (TREE_CODE (t
) == ARRAY_TYPE
)
11396 ? G_("parameter %qD includes pointer to array of "
11397 "unknown bound %qT")
11398 : G_("parameter %qD includes reference to array of "
11399 "unknown bound %qT"),
11405 else if (init
&& !processing_template_decl
)
11406 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11409 DECL_CHAIN (decl
) = decls
;
11411 result
= tree_cons (init
, type
, result
);
11413 decls
= nreverse (decls
);
11414 result
= nreverse (result
);
11416 result
= chainon (result
, void_list_node
);
11423 /* D is a constructor or overloaded `operator='.
11425 Let T be the class in which D is declared. Then, this function
11428 -1 if D's is an ill-formed constructor or copy assignment operator
11429 whose first parameter is of type `T'.
11430 0 if D is not a copy constructor or copy assignment
11432 1 if D is a copy constructor or copy assignment operator whose
11433 first parameter is a reference to non-const qualified T.
11434 2 if D is a copy constructor or copy assignment operator whose
11435 first parameter is a reference to const qualified T.
11437 This function can be used as a predicate. Positive values indicate
11438 a copy constructor and nonzero values indicate a copy assignment
11442 copy_fn_p (const_tree d
)
11448 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11450 if (TREE_CODE (d
) == TEMPLATE_DECL
11451 || (DECL_TEMPLATE_INFO (d
)
11452 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11453 /* Instantiations of template member functions are never copy
11454 functions. Note that member functions of templated classes are
11455 represented as template functions internally, and we must
11456 accept those as copy functions. */
11459 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11463 arg_type
= TREE_VALUE (args
);
11464 if (arg_type
== error_mark_node
)
11467 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11469 /* Pass by value copy assignment operator. */
11472 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11473 && !TYPE_REF_IS_RVALUE (arg_type
)
11474 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11476 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11482 args
= TREE_CHAIN (args
);
11484 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11485 /* There are more non-optional args. */
11491 /* D is a constructor or overloaded `operator='.
11493 Let T be the class in which D is declared. Then, this function
11494 returns true when D is a move constructor or move assignment
11495 operator, false otherwise. */
11498 move_fn_p (const_tree d
)
11500 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11502 if (cxx_dialect
== cxx98
)
11503 /* There are no move constructors if we are in C++98 mode. */
11506 if (TREE_CODE (d
) == TEMPLATE_DECL
11507 || (DECL_TEMPLATE_INFO (d
)
11508 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11509 /* Instantiations of template member functions are never move
11510 functions. Note that member functions of templated classes are
11511 represented as template functions internally, and we must
11512 accept those as move functions. */
11515 return move_signature_fn_p (d
);
11518 /* D is a constructor or overloaded `operator='.
11520 Then, this function returns true when D has the same signature as a move
11521 constructor or move assignment operator (because either it is such a
11522 ctor/op= or it is a template specialization with the same signature),
11523 false otherwise. */
11526 move_signature_fn_p (const_tree d
)
11530 bool result
= false;
11532 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11536 arg_type
= TREE_VALUE (args
);
11537 if (arg_type
== error_mark_node
)
11540 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11541 && TYPE_REF_IS_RVALUE (arg_type
)
11542 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11546 args
= TREE_CHAIN (args
);
11548 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11549 /* There are more non-optional args. */
11555 /* Remember any special properties of member function DECL. */
11558 grok_special_member_properties (tree decl
)
11562 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11565 class_type
= DECL_CONTEXT (decl
);
11566 if (DECL_CONSTRUCTOR_P (decl
))
11568 int ctor
= copy_fn_p (decl
);
11570 if (!DECL_ARTIFICIAL (decl
))
11571 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11577 A non-template constructor for class X is a copy
11578 constructor if its first parameter is of type X&, const
11579 X&, volatile X& or const volatile X&, and either there
11580 are no other parameters or else all other parameters have
11581 default arguments. */
11582 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11583 if (user_provided_p (decl
))
11584 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11586 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11588 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11589 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11590 else if (move_fn_p (decl
) && user_provided_p (decl
))
11591 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11592 else if (is_list_ctor (decl
))
11593 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11595 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11596 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11597 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11599 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11603 A non-template assignment operator for class X is a copy
11604 assignment operator if its parameter is of type X, X&, const
11605 X&, volatile X& or const volatile X&. */
11607 int assop
= copy_fn_p (decl
);
11611 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11612 if (user_provided_p (decl
))
11613 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11615 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11617 else if (move_fn_p (decl
) && user_provided_p (decl
))
11618 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11620 /* Destructors are handled in check_methods. */
11623 /* Check a constructor DECL has the correct form. Complains
11624 if the class has a constructor of the form X(X). */
11627 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11629 int ctor_parm
= copy_fn_p (decl
);
11635 A declaration of a constructor for a class X is ill-formed if
11636 its first parameter is of type (optionally cv-qualified) X
11637 and either there are no other parameters or else all other
11638 parameters have default arguments.
11640 We *don't* complain about member template instantiations that
11641 have this form, though; they can occur as we try to decide
11642 what constructor to use during overload resolution. Since
11643 overload resolution will never prefer such a constructor to
11644 the non-template copy constructor (which is either explicitly
11645 or implicitly defined), there's no need to worry about their
11646 existence. Theoretically, they should never even be
11647 instantiated, but that's hard to forestall. */
11648 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11656 /* An operator with this code is unary, but can also be binary. */
11659 ambi_op_p (enum tree_code code
)
11661 return (code
== INDIRECT_REF
11662 || code
== ADDR_EXPR
11663 || code
== UNARY_PLUS_EXPR
11664 || code
== NEGATE_EXPR
11665 || code
== PREINCREMENT_EXPR
11666 || code
== PREDECREMENT_EXPR
);
11669 /* An operator with this name can only be unary. */
11672 unary_op_p (enum tree_code code
)
11674 return (code
== TRUTH_NOT_EXPR
11675 || code
== BIT_NOT_EXPR
11676 || code
== COMPONENT_REF
11677 || code
== TYPE_EXPR
);
11680 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11681 errors are issued for invalid declarations. */
11684 grok_op_properties (tree decl
, bool complain
)
11686 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11688 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11689 tree name
= DECL_NAME (decl
);
11690 enum tree_code operator_code
;
11695 /* Count the number of arguments and check for ellipsis. */
11696 for (argtype
= argtypes
, arity
= 0;
11697 argtype
&& argtype
!= void_list_node
;
11698 argtype
= TREE_CHAIN (argtype
))
11700 ellipsis_p
= !argtype
;
11702 class_type
= DECL_CONTEXT (decl
);
11703 if (class_type
&& !CLASS_TYPE_P (class_type
))
11704 class_type
= NULL_TREE
;
11706 if (DECL_CONV_FN_P (decl
))
11707 operator_code
= TYPE_EXPR
;
11711 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11712 if (ansi_opname (CODE) == name) \
11714 operator_code = (CODE); \
11717 else if (ansi_assopname (CODE) == name) \
11719 operator_code = (CODE); \
11720 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11724 #include "operators.def"
11725 #undef DEF_OPERATOR
11727 gcc_unreachable ();
11730 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11731 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11734 switch (operator_code
)
11737 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11741 TYPE_GETS_DELETE (class_type
) |= 1;
11745 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11748 case VEC_DELETE_EXPR
:
11749 TYPE_GETS_DELETE (class_type
) |= 2;
11756 /* [basic.std.dynamic.allocation]/1:
11758 A program is ill-formed if an allocation function is declared
11759 in a namespace scope other than global scope or declared static
11762 The same also holds true for deallocation functions. */
11763 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11764 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11766 if (DECL_NAMESPACE_SCOPE_P (decl
))
11768 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11770 error ("%qD may not be declared within a namespace", decl
);
11773 else if (!TREE_PUBLIC (decl
))
11775 error ("%qD may not be declared as static", decl
);
11781 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11783 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11784 DECL_IS_OPERATOR_NEW (decl
) = 1;
11786 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11787 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11790 /* An operator function must either be a non-static member function
11791 or have at least one parameter of a class, a reference to a class,
11792 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11793 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11795 if (operator_code
== TYPE_EXPR
11796 || operator_code
== CALL_EXPR
11797 || operator_code
== COMPONENT_REF
11798 || operator_code
== ARRAY_REF
11799 || operator_code
== NOP_EXPR
)
11801 error ("%qD must be a nonstatic member function", decl
);
11808 if (DECL_STATIC_FUNCTION_P (decl
))
11810 error ("%qD must be either a non-static member "
11811 "function or a non-member function", decl
);
11815 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11817 tree arg
= non_reference (TREE_VALUE (p
));
11818 if (arg
== error_mark_node
)
11821 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11822 because these checks are performed even on
11823 template functions. */
11824 if (MAYBE_CLASS_TYPE_P (arg
)
11825 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11829 if (!p
|| p
== void_list_node
)
11832 error ("%qD must have an argument of class or "
11833 "enumerated type", decl
);
11839 /* There are no restrictions on the arguments to an overloaded
11841 if (operator_code
== CALL_EXPR
)
11844 /* Warn about conversion operators that will never be used. */
11845 if (IDENTIFIER_TYPENAME_P (name
)
11846 && ! DECL_TEMPLATE_INFO (decl
)
11848 /* Warn only declaring the function; there is no need to
11849 warn again about out-of-class definitions. */
11850 && class_type
== current_class_type
)
11852 tree t
= TREE_TYPE (name
);
11853 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11856 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11858 if (VOID_TYPE_P (t
))
11859 warning (OPT_Wconversion
,
11861 ? G_("conversion to a reference to void "
11862 "will never use a type conversion operator")
11863 : G_("conversion to void "
11864 "will never use a type conversion operator"));
11865 else if (class_type
)
11867 if (t
== class_type
)
11868 warning (OPT_Wconversion
,
11870 ? G_("conversion to a reference to the same type "
11871 "will never use a type conversion operator")
11872 : G_("conversion to the same type "
11873 "will never use a type conversion operator"));
11874 /* Don't force t to be complete here. */
11875 else if (MAYBE_CLASS_TYPE_P (t
)
11876 && COMPLETE_TYPE_P (t
)
11877 && DERIVED_FROM_P (t
, class_type
))
11878 warning (OPT_Wconversion
,
11880 ? G_("conversion to a reference to a base class "
11881 "will never use a type conversion operator")
11882 : G_("conversion to a base class "
11883 "will never use a type conversion operator"));
11888 if (operator_code
== COND_EXPR
)
11891 error ("ISO C++ prohibits overloading operator ?:");
11894 else if (ellipsis_p
)
11896 error ("%qD must not have variable number of arguments", decl
);
11899 else if (ambi_op_p (operator_code
))
11902 /* We pick the one-argument operator codes by default, so
11903 we don't have to change anything. */
11905 else if (arity
== 2)
11907 /* If we thought this was a unary operator, we now know
11908 it to be a binary operator. */
11909 switch (operator_code
)
11912 operator_code
= MULT_EXPR
;
11916 operator_code
= BIT_AND_EXPR
;
11919 case UNARY_PLUS_EXPR
:
11920 operator_code
= PLUS_EXPR
;
11924 operator_code
= MINUS_EXPR
;
11927 case PREINCREMENT_EXPR
:
11928 operator_code
= POSTINCREMENT_EXPR
;
11931 case PREDECREMENT_EXPR
:
11932 operator_code
= POSTDECREMENT_EXPR
;
11936 gcc_unreachable ();
11939 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11941 if ((operator_code
== POSTINCREMENT_EXPR
11942 || operator_code
== POSTDECREMENT_EXPR
)
11943 && ! processing_template_decl
11944 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11947 error ("postfix %qD must take %<int%> as its argument",
11950 error ("postfix %qD must take %<int%> as its second "
11958 error ("%qD must take either zero or one argument", decl
);
11960 error ("%qD must take either one or two arguments", decl
);
11964 /* More Effective C++ rule 6. */
11966 && (operator_code
== POSTINCREMENT_EXPR
11967 || operator_code
== POSTDECREMENT_EXPR
11968 || operator_code
== PREINCREMENT_EXPR
11969 || operator_code
== PREDECREMENT_EXPR
))
11971 tree arg
= TREE_VALUE (argtypes
);
11972 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11973 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11974 arg
= TREE_TYPE (arg
);
11975 arg
= TYPE_MAIN_VARIANT (arg
);
11976 if (operator_code
== PREINCREMENT_EXPR
11977 || operator_code
== PREDECREMENT_EXPR
)
11979 if (TREE_CODE (ret
) != REFERENCE_TYPE
11980 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11982 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11983 build_reference_type (arg
));
11987 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11988 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11992 else if (unary_op_p (operator_code
))
11997 error ("%qD must take %<void%>", decl
);
11999 error ("%qD must take exactly one argument", decl
);
12003 else /* if (binary_op_p (operator_code)) */
12008 error ("%qD must take exactly one argument", decl
);
12010 error ("%qD must take exactly two arguments", decl
);
12014 /* More Effective C++ rule 7. */
12016 && (operator_code
== TRUTH_ANDIF_EXPR
12017 || operator_code
== TRUTH_ORIF_EXPR
12018 || operator_code
== COMPOUND_EXPR
))
12019 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12023 /* Effective C++ rule 23. */
12026 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12027 && (operator_code
== PLUS_EXPR
12028 || operator_code
== MINUS_EXPR
12029 || operator_code
== TRUNC_DIV_EXPR
12030 || operator_code
== MULT_EXPR
12031 || operator_code
== TRUNC_MOD_EXPR
)
12032 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12033 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12035 /* [over.oper]/8 */
12036 for (; argtypes
&& argtypes
!= void_list_node
;
12037 argtypes
= TREE_CHAIN (argtypes
))
12038 if (TREE_PURPOSE (argtypes
))
12040 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12041 if (operator_code
== POSTINCREMENT_EXPR
12042 || operator_code
== POSTDECREMENT_EXPR
)
12044 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12049 error ("%qD cannot have default arguments", decl
);
12057 /* Return a string giving the keyword associate with CODE. */
12059 static const char *
12060 tag_name (enum tag_types code
)
12072 case typename_type
:
12075 gcc_unreachable ();
12079 /* Name lookup in an elaborated-type-specifier (after the keyword
12080 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12081 elaborated-type-specifier is invalid, issue a diagnostic and return
12082 error_mark_node; otherwise, return the *_TYPE to which it referred.
12083 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12086 check_elaborated_type_specifier (enum tag_types tag_code
,
12088 bool allow_template_p
)
12094 struct S { struct S *p; };
12096 name lookup will find the TYPE_DECL for the implicit "S::S"
12097 typedef. Adjust for that here. */
12098 if (DECL_SELF_REFERENCE_P (decl
))
12099 decl
= TYPE_NAME (TREE_TYPE (decl
));
12101 type
= TREE_TYPE (decl
);
12103 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12104 is false for this case as well. */
12105 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12107 error ("using template type parameter %qT after %qs",
12108 type
, tag_name (tag_code
));
12109 return error_mark_node
;
12111 /* Accept template template parameters. */
12112 else if (allow_template_p
12113 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12114 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12118 If the identifier resolves to a typedef-name or the
12119 simple-template-id resolves to an alias template
12120 specialization, the elaborated-type-specifier is ill-formed.
12122 In other words, the only legitimate declaration to use in the
12123 elaborated type specifier is the implicit typedef created when
12124 the type is declared. */
12125 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12126 && !DECL_SELF_REFERENCE_P (decl
)
12127 && tag_code
!= typename_type
)
12129 if (alias_template_specialization_p (type
))
12130 error ("using alias template specialization %qT after %qs",
12131 type
, tag_name (tag_code
));
12133 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12134 inform (DECL_SOURCE_LOCATION (decl
),
12135 "%qD has a previous declaration here", decl
);
12136 return error_mark_node
;
12138 else if (TREE_CODE (type
) != RECORD_TYPE
12139 && TREE_CODE (type
) != UNION_TYPE
12140 && tag_code
!= enum_type
12141 && tag_code
!= typename_type
)
12143 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12144 inform (input_location
, "%q+T has a previous declaration here", type
);
12145 return error_mark_node
;
12147 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12148 && tag_code
== enum_type
)
12150 error ("%qT referred to as enum", type
);
12151 inform (input_location
, "%q+T has a previous declaration here", type
);
12152 return error_mark_node
;
12154 else if (!allow_template_p
12155 && TREE_CODE (type
) == RECORD_TYPE
12156 && CLASSTYPE_IS_TEMPLATE (type
))
12158 /* If a class template appears as elaborated type specifier
12159 without a template header such as:
12161 template <class T> class C {};
12162 void f(class C); // No template header here
12164 then the required template argument is missing. */
12165 error ("template argument required for %<%s %T%>",
12166 tag_name (tag_code
),
12167 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12168 return error_mark_node
;
12174 /* Lookup NAME in elaborate type specifier in scope according to
12175 SCOPE and issue diagnostics if necessary.
12176 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12177 found, and ERROR_MARK_NODE for type error. */
12180 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12181 tag_scope scope
, bool template_header_p
)
12185 if (scope
== ts_global
)
12187 /* First try ordinary name lookup, ignoring hidden class name
12188 injected via friend declaration. */
12189 decl
= lookup_name_prefer_type (name
, 2);
12190 decl
= strip_using_decl (decl
);
12191 /* If that fails, the name will be placed in the smallest
12192 non-class, non-function-prototype scope according to 3.3.1/5.
12193 We may already have a hidden name declared as friend in this
12194 scope. So lookup again but not ignoring hidden names.
12195 If we find one, that name will be made visible rather than
12196 creating a new tag. */
12198 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12201 decl
= lookup_type_scope (name
, scope
);
12204 && (DECL_CLASS_TEMPLATE_P (decl
)
12205 /* If scope is ts_current we're defining a class, so ignore a
12206 template template parameter. */
12207 || (scope
!= ts_current
12208 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12209 decl
= DECL_TEMPLATE_RESULT (decl
);
12211 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12213 /* Look for invalid nested type:
12217 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12219 error ("%qD has the same name as the class in which it is "
12222 return error_mark_node
;
12225 /* Two cases we need to consider when deciding if a class
12226 template is allowed as an elaborated type specifier:
12227 1. It is a self reference to its own class.
12228 2. It comes with a template header.
12232 template <class T> class C {
12233 class C *c1; // DECL_SELF_REFERENCE_P is true
12236 template <class U> class C; // template_header_p is true
12237 template <class T> class C<T>::D {
12238 class C *c2; // DECL_SELF_REFERENCE_P is true
12241 t
= check_elaborated_type_specifier (tag_code
,
12244 | DECL_SELF_REFERENCE_P (decl
));
12247 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12249 error ("reference to %qD is ambiguous", name
);
12250 print_candidates (decl
);
12251 return error_mark_node
;
12257 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12258 Define the tag as a forward-reference if it is not defined.
12260 If a declaration is given, process it here, and report an error if
12261 multiple declarations are not identical.
12263 SCOPE is TS_CURRENT when this is also a definition. Only look in
12264 the current frame for the name (since C++ allows new names in any
12265 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12266 declaration. Only look beginning from the current scope outward up
12267 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12269 TEMPLATE_HEADER_P is true when this declaration is preceded by
12270 a set of template parameters. */
12273 xref_tag_1 (enum tag_types tag_code
, tree name
,
12274 tag_scope orig_scope
, bool template_header_p
)
12276 enum tree_code code
;
12278 tree context
= NULL_TREE
;
12281 gcc_assert (identifier_p (name
));
12287 code
= RECORD_TYPE
;
12293 code
= ENUMERAL_TYPE
;
12296 gcc_unreachable ();
12299 if (orig_scope
== ts_lambda
)
12300 scope
= ts_current
;
12302 scope
= orig_scope
;
12304 /* In case of anonymous name, xref_tag is only called to
12305 make type node and push name. Name lookup is not required. */
12306 if (ANON_AGGRNAME_P (name
))
12309 t
= lookup_and_check_tag (tag_code
, name
,
12310 scope
, template_header_p
);
12312 if (t
== error_mark_node
)
12313 return error_mark_node
;
12315 if (scope
!= ts_current
&& t
&& current_class_type
12316 && template_class_depth (current_class_type
)
12317 && template_header_p
)
12319 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12322 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12323 definition of this tag. Since, in addition, we are currently
12324 processing a (member) template declaration of a template
12325 class, we must be very careful; consider:
12332 { template <class V>
12333 friend struct S1; };
12335 Here, the S2::S1 declaration should not be confused with the
12336 outer declaration. In particular, the inner version should
12337 have a template parameter of level 2, not level 1. This
12338 would be particularly important if the member declaration
12341 template <class V = U> friend struct S1;
12343 say, when we should tsubst into `U' when instantiating
12344 S2. On the other hand, when presented with:
12354 we must find the inner binding eventually. We
12355 accomplish this by making sure that the new type we
12356 create to represent this declaration has the right
12358 context
= TYPE_CONTEXT (t
);
12364 /* If no such tag is yet defined, create a forward-reference node
12365 and record it as the "definition".
12366 When a real declaration of this type is found,
12367 the forward-reference will be altered into a real type. */
12368 if (code
== ENUMERAL_TYPE
)
12370 error ("use of enum %q#D without previous declaration", name
);
12371 return error_mark_node
;
12375 t
= make_class_type (code
);
12376 TYPE_CONTEXT (t
) = context
;
12377 if (orig_scope
== ts_lambda
)
12378 /* Remember that we're declaring a lambda to avoid bogus errors
12379 in push_template_decl. */
12380 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12381 t
= pushtag (name
, t
, scope
);
12386 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12388 if (!redeclare_class_template (t
, current_template_parms
))
12389 return error_mark_node
;
12391 else if (!processing_template_decl
12392 && CLASS_TYPE_P (t
)
12393 && CLASSTYPE_IS_TEMPLATE (t
))
12395 error ("redeclaration of %qT as a non-template", t
);
12396 error ("previous declaration %q+D", t
);
12397 return error_mark_node
;
12400 /* Make injected friend class visible. */
12401 if (scope
!= ts_within_enclosing_non_class
12402 && hidden_name_p (TYPE_NAME (t
)))
12404 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12405 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12407 if (TYPE_TEMPLATE_INFO (t
))
12409 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12410 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12418 /* Wrapper for xref_tag_1. */
12421 xref_tag (enum tag_types tag_code
, tree name
,
12422 tag_scope scope
, bool template_header_p
)
12426 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12427 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12428 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12434 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12436 enum tag_types tag_kind
;
12438 if (TREE_CODE (old
) == RECORD_TYPE
)
12439 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12441 tag_kind
= union_type
;
12443 if (id
== NULL_TREE
)
12444 id
= TYPE_IDENTIFIER (old
);
12446 return xref_tag (tag_kind
, id
, scope
, false);
12449 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12450 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12451 access_* node, and the TREE_VALUE is the type of the base-class.
12452 Non-NULL TREE_TYPE indicates virtual inheritance.
12454 Returns true if the binfo hierarchy was successfully created,
12455 false if an error was detected. */
12458 xref_basetypes (tree ref
, tree base_list
)
12461 tree binfo
, base_binfo
;
12462 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12463 unsigned max_bases
= 0; /* Maximum direct bases. */
12465 tree default_access
;
12466 tree igo_prev
; /* Track Inheritance Graph Order. */
12468 if (ref
== error_mark_node
)
12471 /* The base of a derived class is private by default, all others are
12473 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12474 && CLASSTYPE_DECLARED_CLASS (ref
)
12475 ? access_private_node
: access_public_node
);
12477 /* First, make sure that any templates in base-classes are
12478 instantiated. This ensures that if we call ourselves recursively
12479 we do not get confused about which classes are marked and which
12481 basep
= &base_list
;
12484 tree basetype
= TREE_VALUE (*basep
);
12486 /* The dependent_type_p call below should really be dependent_scope_p
12487 so that we give a hard error about using an incomplete type as a
12488 base, but we allow it with a pedwarn for backward
12490 if (processing_template_decl
12491 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12492 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12493 if (!dependent_type_p (basetype
)
12494 && !complete_type_or_else (basetype
, NULL
))
12495 /* An incomplete type. Remove it from the list. */
12496 *basep
= TREE_CHAIN (*basep
);
12500 if (TREE_TYPE (*basep
))
12502 if (CLASS_TYPE_P (basetype
))
12503 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12504 basep
= &TREE_CHAIN (*basep
);
12508 TYPE_MARKED_P (ref
) = 1;
12510 /* The binfo slot should be empty, unless this is an (ill-formed)
12512 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12514 error ("redefinition of %q#T", ref
);
12518 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12520 binfo
= make_tree_binfo (max_bases
);
12522 TYPE_BINFO (ref
) = binfo
;
12523 BINFO_OFFSET (binfo
) = size_zero_node
;
12524 BINFO_TYPE (binfo
) = ref
;
12526 /* Apply base-class info set up to the variants of this type. */
12527 fixup_type_variants (ref
);
12531 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12532 /* An aggregate cannot have baseclasses. */
12533 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12535 if (TREE_CODE (ref
) == UNION_TYPE
)
12537 error ("derived union %qT invalid", ref
);
12544 if (TYPE_FOR_JAVA (ref
))
12546 error ("Java class %qT cannot have multiple bases", ref
);
12553 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12555 if (TYPE_FOR_JAVA (ref
))
12557 error ("Java class %qT cannot have virtual bases", ref
);
12562 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12564 tree access
= TREE_PURPOSE (base_list
);
12565 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12566 tree basetype
= TREE_VALUE (base_list
);
12568 if (access
== access_default_node
)
12569 access
= default_access
;
12571 if (PACK_EXPANSION_P (basetype
))
12572 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12573 if (TREE_CODE (basetype
) == TYPE_DECL
)
12574 basetype
= TREE_TYPE (basetype
);
12575 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12577 error ("base type %qT fails to be a struct or class type",
12582 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12583 TYPE_FOR_JAVA (ref
) = 1;
12585 base_binfo
= NULL_TREE
;
12586 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12588 base_binfo
= TYPE_BINFO (basetype
);
12589 /* The original basetype could have been a typedef'd type. */
12590 basetype
= BINFO_TYPE (base_binfo
);
12592 /* Inherit flags from the base. */
12593 TYPE_HAS_NEW_OPERATOR (ref
)
12594 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12595 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12596 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12597 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12598 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12599 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12600 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12601 CLASSTYPE_REPEATED_BASE_P (ref
)
12602 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12605 /* We must do this test after we've seen through a typedef
12607 if (TYPE_MARKED_P (basetype
))
12609 if (basetype
== ref
)
12610 error ("recursive type %qT undefined", basetype
);
12612 error ("duplicate base type %qT invalid", basetype
);
12616 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12617 /* Regenerate the pack expansion for the bases. */
12618 basetype
= make_pack_expansion (basetype
);
12620 TYPE_MARKED_P (basetype
) = 1;
12622 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12623 &igo_prev
, via_virtual
);
12624 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12625 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12627 BINFO_BASE_APPEND (binfo
, base_binfo
);
12628 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12631 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12632 /* If we didn't get max_vbases vbases, we must have shared at
12633 least one of them, and are therefore diamond shaped. */
12634 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12636 /* Unmark all the types. */
12637 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12638 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12639 TYPE_MARKED_P (ref
) = 0;
12641 /* Now see if we have a repeated base type. */
12642 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12644 for (base_binfo
= binfo
; base_binfo
;
12645 base_binfo
= TREE_CHAIN (base_binfo
))
12647 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12649 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12652 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12654 for (base_binfo
= binfo
; base_binfo
;
12655 base_binfo
= TREE_CHAIN (base_binfo
))
12656 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12657 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12666 /* Copies the enum-related properties from type SRC to type DST.
12667 Used with the underlying type of an enum and the enum itself. */
12669 copy_type_enum (tree dst
, tree src
)
12672 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12674 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12675 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12676 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12677 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12678 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12679 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12680 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12681 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12682 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12686 /* Begin compiling the definition of an enumeration type.
12689 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12691 UNDERLYING_TYPE is the type that will be used as the storage for
12692 the enumeration type. This should be NULL_TREE if no storage type
12695 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12697 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12699 Returns the type object, as yet incomplete.
12700 Also records info about it so that build_enumerator
12701 may be used to declare the individual values as they are read. */
12704 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12705 bool scoped_enum_p
, bool *is_new
)
12707 tree prevtype
= NULL_TREE
;
12708 gcc_assert (identifier_p (name
));
12712 /* [C++0x dcl.enum]p5:
12714 If not explicitly specified, the underlying type of a scoped
12715 enumeration type is int. */
12716 if (!underlying_type
&& scoped_enum_p
)
12717 underlying_type
= integer_type_node
;
12719 if (underlying_type
)
12720 underlying_type
= cv_unqualified (underlying_type
);
12722 /* If this is the real definition for a previous forward reference,
12723 fill in the contents in the same object that used to be the
12724 forward reference. */
12726 enumtype
= lookup_and_check_tag (enum_type
, name
,
12727 /*tag_scope=*/ts_current
,
12728 /*template_header_p=*/false);
12730 /* In case of a template_decl, the only check that should be deferred
12731 to instantiation time is the comparison of underlying types. */
12732 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12734 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12736 error_at (input_location
, "scoped/unscoped mismatch "
12737 "in enum %q#T", enumtype
);
12738 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12739 "previous definition here");
12740 enumtype
= error_mark_node
;
12742 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12744 error_at (input_location
, "underlying type mismatch "
12745 "in enum %q#T", enumtype
);
12746 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12747 "previous definition here");
12748 enumtype
= error_mark_node
;
12750 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12751 && !dependent_type_p (underlying_type
)
12752 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12753 && !same_type_p (underlying_type
,
12754 ENUM_UNDERLYING_TYPE (enumtype
)))
12756 error_at (input_location
, "different underlying type "
12757 "in enum %q#T", enumtype
);
12758 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12759 "previous definition here");
12760 underlying_type
= NULL_TREE
;
12764 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12765 || processing_template_decl
)
12767 /* In case of error, make a dummy enum to allow parsing to
12769 if (enumtype
== error_mark_node
)
12771 name
= make_anon_name ();
12772 enumtype
= NULL_TREE
;
12775 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12776 of an opaque enum, or an opaque enum of an already defined
12777 enumeration (C++0x only).
12778 In any other case, it'll be NULL_TREE. */
12784 prevtype
= enumtype
;
12786 /* Do not push the decl more than once, unless we need to
12787 compare underlying types at instantiation time */
12789 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12790 || (underlying_type
12791 && dependent_type_p (underlying_type
))
12792 || (ENUM_UNDERLYING_TYPE (enumtype
)
12793 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12795 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12796 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12799 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12802 if (enumtype
== error_mark_node
)
12803 return error_mark_node
;
12805 /* The enum is considered opaque until the opening '{' of the
12806 enumerator list. */
12807 SET_OPAQUE_ENUM_P (enumtype
, true);
12808 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12811 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12813 if (underlying_type
)
12815 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12817 copy_type_enum (enumtype
, underlying_type
);
12818 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12820 else if (dependent_type_p (underlying_type
))
12821 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12823 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12824 underlying_type
, enumtype
);
12827 /* If into a template class, the returned enum is always the first
12828 declaration (opaque or not) seen. This way all the references to
12829 this type will be to the same declaration. The following ones are used
12830 only to check for definition errors. */
12831 if (prevtype
&& processing_template_decl
)
12837 /* After processing and defining all the values of an enumeration type,
12838 install their decls in the enumeration type.
12839 ENUMTYPE is the type object. */
12842 finish_enum_value_list (tree enumtype
)
12845 tree underlying_type
;
12848 tree minnode
, maxnode
;
12851 bool fixed_underlying_type_p
12852 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12854 /* We built up the VALUES in reverse order. */
12855 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12857 /* For an enum defined in a template, just set the type of the values;
12858 all further processing is postponed until the template is
12859 instantiated. We need to set the type so that tsubst of a CONST_DECL
12861 if (processing_template_decl
)
12863 for (values
= TYPE_VALUES (enumtype
);
12865 values
= TREE_CHAIN (values
))
12866 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12870 /* Determine the minimum and maximum values of the enumerators. */
12871 if (TYPE_VALUES (enumtype
))
12873 minnode
= maxnode
= NULL_TREE
;
12875 for (values
= TYPE_VALUES (enumtype
);
12877 values
= TREE_CHAIN (values
))
12879 decl
= TREE_VALUE (values
);
12881 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12882 each enumerator has the type of its enumeration. Prior to the
12883 closing brace, the type of each enumerator is the type of its
12884 initializing value. */
12885 TREE_TYPE (decl
) = enumtype
;
12887 /* Update the minimum and maximum values, if appropriate. */
12888 value
= DECL_INITIAL (decl
);
12889 if (value
== error_mark_node
)
12890 value
= integer_zero_node
;
12891 /* Figure out what the minimum and maximum values of the
12892 enumerators are. */
12894 minnode
= maxnode
= value
;
12895 else if (tree_int_cst_lt (maxnode
, value
))
12897 else if (tree_int_cst_lt (value
, minnode
))
12904 If the enumerator-list is empty, the underlying type is as if
12905 the enumeration had a single enumerator with value 0. */
12906 minnode
= maxnode
= integer_zero_node
;
12908 if (!fixed_underlying_type_p
)
12910 /* Compute the number of bits require to represent all values of the
12911 enumeration. We must do this before the type of MINNODE and
12912 MAXNODE are transformed, since tree_int_cst_min_precision relies
12913 on the TREE_TYPE of the value it is passed. */
12914 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12915 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12916 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12917 int precision
= MAX (lowprec
, highprec
);
12919 bool use_short_enum
;
12921 /* Determine the underlying type of the enumeration.
12925 The underlying type of an enumeration is an integral type that
12926 can represent all the enumerator values defined in the
12927 enumeration. It is implementation-defined which integral type is
12928 used as the underlying type for an enumeration except that the
12929 underlying type shall not be larger than int unless the value of
12930 an enumerator cannot fit in an int or unsigned int.
12932 We use "int" or an "unsigned int" as the underlying type, even if
12933 a smaller integral type would work, unless the user has
12934 explicitly requested that we use the smallest possible type. The
12935 user can request that for all enumerations with a command line
12936 flag, or for just one enumeration with an attribute. */
12938 use_short_enum
= flag_short_enums
12939 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12941 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12945 underlying_type
= integer_types
[itk
];
12946 if (underlying_type
!= NULL_TREE
12947 && TYPE_PRECISION (underlying_type
) >= precision
12948 && TYPE_SIGN (underlying_type
) == sgn
)
12951 if (itk
== itk_none
)
12955 IF no integral type can represent all the enumerator values, the
12956 enumeration is ill-formed. */
12957 error ("no integral type can represent all of the enumerator values "
12958 "for %qT", enumtype
);
12959 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12960 underlying_type
= integer_types
[itk_unsigned_long_long
];
12965 The value of sizeof() applied to an enumeration type, an object
12966 of an enumeration type, or an enumerator, is the value of sizeof()
12967 applied to the underlying type. */
12968 copy_type_enum (enumtype
, underlying_type
);
12970 /* Compute the minimum and maximum values for the type.
12974 For an enumeration where emin is the smallest enumerator and emax
12975 is the largest, the values of the enumeration are the values of the
12976 underlying type in the range bmin to bmax, where bmin and bmax are,
12977 respectively, the smallest and largest values of the smallest bit-
12978 field that can store emin and emax. */
12980 /* The middle-end currently assumes that types with TYPE_PRECISION
12981 narrower than their underlying type are suitably zero or sign
12982 extended to fill their mode. Similarly, it assumes that the front
12983 end assures that a value of a particular type must be within
12984 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12986 We used to set these fields based on bmin and bmax, but that led
12987 to invalid assumptions like optimizing away bounds checking. So
12988 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12989 TYPE_MAX_VALUE to the values for the mode above and only restrict
12990 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12991 ENUM_UNDERLYING_TYPE (enumtype
)
12992 = build_distinct_type_copy (underlying_type
);
12993 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12994 set_min_and_max_values_for_integral_type
12995 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12997 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12998 if (flag_strict_enums
)
12999 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
13002 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13004 /* Convert each of the enumerators to the type of the underlying
13005 type of the enumeration. */
13006 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13008 location_t saved_location
;
13010 decl
= TREE_VALUE (values
);
13011 saved_location
= input_location
;
13012 input_location
= DECL_SOURCE_LOCATION (decl
);
13013 if (fixed_underlying_type_p
)
13014 /* If the enumeration type has a fixed underlying type, we
13015 already checked all of the enumerator values. */
13016 value
= DECL_INITIAL (decl
);
13018 value
= perform_implicit_conversion (underlying_type
,
13019 DECL_INITIAL (decl
),
13020 tf_warning_or_error
);
13021 input_location
= saved_location
;
13023 /* Do not clobber shared ints. */
13024 value
= copy_node (value
);
13026 TREE_TYPE (value
) = enumtype
;
13027 DECL_INITIAL (decl
) = value
;
13030 /* Fix up all variant types of this enum type. */
13031 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13032 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13034 if (at_class_scope_p ()
13035 && COMPLETE_TYPE_P (current_class_type
)
13036 && UNSCOPED_ENUM_P (enumtype
))
13037 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13038 current_class_type
);
13040 /* Finish debugging output for this type. */
13041 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13044 /* Finishes the enum type. This is called only the first time an
13045 enumeration is seen, be it opaque or odinary.
13046 ENUMTYPE is the type object. */
13049 finish_enum (tree enumtype
)
13051 if (processing_template_decl
)
13053 if (at_function_scope_p ())
13054 add_stmt (build_min (TAG_DEFN
, enumtype
));
13058 /* If this is a forward declaration, there should not be any variants,
13059 though we can get a variant in the middle of an enum-specifier with
13060 wacky code like 'enum E { e = sizeof(const E*) };' */
13061 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13062 && (TYPE_VALUES (enumtype
)
13063 || !TYPE_NEXT_VARIANT (enumtype
)));
13066 /* Build and install a CONST_DECL for an enumeration constant of the
13067 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13068 Apply ATTRIBUTES if available. LOC is the location of NAME.
13069 Assignment of sequential values by default is handled here. */
13072 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13079 /* scalar_constant_value will pull out this expression, so make sure
13080 it's folded as appropriate. */
13081 if (processing_template_decl
)
13082 value
= fold_non_dependent_expr (value
);
13084 /* If the VALUE was erroneous, pretend it wasn't there; that will
13085 result in the enum being assigned the next value in sequence. */
13086 if (value
== error_mark_node
)
13089 /* Remove no-op casts from the value. */
13091 STRIP_TYPE_NOPS (value
);
13093 if (! processing_template_decl
)
13095 /* Validate and default VALUE. */
13096 if (value
!= NULL_TREE
)
13098 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13100 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13105 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13106 (TREE_TYPE (value
)))
13107 value
= perform_implicit_conversion_flags
13108 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13109 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13111 if (value
== error_mark_node
)
13114 if (value
!= NULL_TREE
)
13116 value
= cxx_constant_value (value
);
13118 if (TREE_CODE (value
) != INTEGER_CST
13119 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13121 error ("enumerator value for %qD is not an integer constant",
13128 /* Default based on previous value. */
13129 if (value
== NULL_TREE
)
13131 if (TYPE_VALUES (enumtype
))
13136 /* C++03 7.2/4: If no initializer is specified for the first
13137 enumerator, the type is an unspecified integral
13138 type. Otherwise the type is the same as the type of the
13139 initializing value of the preceding enumerator unless the
13140 incremented value is not representable in that type, in
13141 which case the type is an unspecified integral type
13142 sufficient to contain the incremented value. */
13143 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13144 if (error_operand_p (prev_value
))
13145 value
= error_mark_node
;
13148 tree type
= TREE_TYPE (prev_value
);
13149 signop sgn
= TYPE_SIGN (type
);
13150 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13154 bool pos
= !wi::neg_p (wi
, sgn
);
13155 if (!wi::fits_to_tree_p (wi
, type
))
13158 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13160 type
= integer_types
[itk
];
13161 if (type
!= NULL_TREE
13162 && (pos
|| !TYPE_UNSIGNED (type
))
13163 && wi::fits_to_tree_p (wi
, type
))
13166 if (type
&& cxx_dialect
< cxx11
13167 && itk
> itk_unsigned_long
)
13168 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13169 incremented enumerator value is too large for %<unsigned long%>" : "\
13170 incremented enumerator value is too large for %<long%>");
13172 if (type
== NULL_TREE
)
13175 value
= wide_int_to_tree (type
, wi
);
13180 error ("overflow in enumeration values at %qD", name
);
13181 value
= error_mark_node
;
13186 value
= integer_zero_node
;
13189 /* Remove no-op casts from the value. */
13190 STRIP_TYPE_NOPS (value
);
13192 /* If the underlying type of the enum is fixed, check whether
13193 the enumerator values fits in the underlying type. If it
13194 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13195 if (ENUM_UNDERLYING_TYPE (enumtype
)
13197 && TREE_CODE (value
) == INTEGER_CST
)
13199 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13200 error ("enumerator value %E is outside the range of underlying "
13201 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13203 /* Convert the value to the appropriate type. */
13204 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13208 /* C++ associates enums with global, function, or class declarations. */
13209 context
= current_scope ();
13211 /* Build the actual enumeration constant. Note that the enumeration
13212 constants have the underlying type of the enum (if it is fixed)
13213 or the type of their initializer (if the underlying type of the
13214 enum is not fixed):
13218 If the underlying type is fixed, the type of each enumerator
13219 prior to the closing brace is the underlying type; if the
13220 initializing value of an enumerator cannot be represented by
13221 the underlying type, the program is ill-formed. If the
13222 underlying type is not fixed, the type of each enumerator is
13223 the type of its initializing value.
13225 If the underlying type is not fixed, it will be computed by
13226 finish_enum and we will reset the type of this enumerator. Of
13227 course, if we're processing a template, there may be no value. */
13228 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13230 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13232 DECL_CONTEXT (decl
) = enumtype
;
13233 TREE_CONSTANT (decl
) = 1;
13234 TREE_READONLY (decl
) = 1;
13235 DECL_INITIAL (decl
) = value
;
13238 cplus_decl_attributes (&decl
, attributes
, 0);
13240 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13241 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13242 on the TYPE_FIELDS list for `S'. (That's so that you can say
13243 things like `S::i' later.) */
13244 finish_member_declaration (decl
);
13248 /* Add this enumeration constant to the list for this type. */
13249 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13252 /* Look for an enumerator with the given NAME within the enumeration
13253 type ENUMTYPE. This routine is used primarily for qualified name
13254 lookup into an enumerator in C++0x, e.g.,
13256 enum class Color { Red, Green, Blue };
13258 Color color = Color::Red;
13260 Returns the value corresponding to the enumerator, or
13261 NULL_TREE if no such enumerator was found. */
13263 lookup_enumerator (tree enumtype
, tree name
)
13266 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13268 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13269 return e
? TREE_VALUE (e
) : NULL_TREE
;
13273 /* We're defining DECL. Make sure that its type is OK. */
13276 check_function_type (tree decl
, tree current_function_parms
)
13278 tree fntype
= TREE_TYPE (decl
);
13279 tree return_type
= complete_type (TREE_TYPE (fntype
));
13281 /* In a function definition, arg types must be complete. */
13282 require_complete_types_for_parms (current_function_parms
);
13284 if (dependent_type_p (return_type
)
13285 || type_uses_auto (return_type
))
13287 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13288 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13290 tree args
= TYPE_ARG_TYPES (fntype
);
13292 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13293 error ("return type %q#T is incomplete", return_type
);
13295 error ("return type has Java class type %q#T", return_type
);
13297 /* Make it return void instead. */
13298 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13299 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13301 TREE_CHAIN (args
));
13303 fntype
= build_function_type (void_type_node
, args
);
13305 = build_exception_variant (fntype
,
13306 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13307 fntype
= (cp_build_type_attribute_variant
13308 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13309 TREE_TYPE (decl
) = fntype
;
13312 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13315 /* Create the FUNCTION_DECL for a function definition.
13316 DECLSPECS and DECLARATOR are the parts of the declaration;
13317 they describe the function's name and the type it returns,
13318 but twisted together in a fashion that parallels the syntax of C.
13320 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13321 DECLARATOR is really the DECL for the function we are about to
13322 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13323 indicating that the function is an inline defined in-class.
13325 This function creates a binding context for the function body
13326 as well as setting up the FUNCTION_DECL in current_function_decl.
13328 For C++, we must first check whether that datum makes any sense.
13329 For example, "class A local_a(1,2);" means that variable local_a
13330 is an aggregate of type A, which should have a constructor
13331 applied to it with the argument list [1, 2].
13333 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13334 or may be a BLOCK if the function has been defined previously
13335 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13336 error_mark_node if the function has never been defined, or
13337 a BLOCK if the function has been defined somewhere. */
13340 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13342 tree ctype
= NULL_TREE
;
13345 int doing_friend
= 0;
13346 cp_binding_level
*bl
;
13347 tree current_function_parms
;
13348 struct c_fileinfo
*finfo
13349 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13350 bool honor_interface
;
13352 /* Sanity check. */
13353 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13354 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13356 fntype
= TREE_TYPE (decl1
);
13357 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13358 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13360 /* ISO C++ 11.4/5. A friend function defined in a class is in
13361 the (lexical) scope of the class in which it is defined. */
13362 if (!ctype
&& DECL_FRIEND_P (decl1
))
13364 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13366 /* CTYPE could be null here if we're dealing with a template;
13367 for example, `inline friend float foo()' inside a template
13368 will have no CTYPE set. */
13369 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13375 if (DECL_DECLARED_INLINE_P (decl1
)
13376 && lookup_attribute ("noinline", attrs
))
13377 warning (0, "inline function %q+D given attribute noinline", decl1
);
13379 /* Handle gnu_inline attribute. */
13380 if (GNU_INLINE_P (decl1
))
13382 DECL_EXTERNAL (decl1
) = 1;
13383 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13384 DECL_INTERFACE_KNOWN (decl1
) = 1;
13385 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13388 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13389 /* This is a constructor, we must ensure that any default args
13390 introduced by this definition are propagated to the clones
13391 now. The clones are used directly in overload resolution. */
13392 adjust_clone_args (decl1
);
13394 /* Sometimes we don't notice that a function is a static member, and
13395 build a METHOD_TYPE for it. Fix that up now. */
13396 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13397 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13399 /* Set up current_class_type, and enter the scope of the class, if
13402 push_nested_class (ctype
);
13403 else if (DECL_STATIC_FUNCTION_P (decl1
))
13404 push_nested_class (DECL_CONTEXT (decl1
));
13406 /* Now that we have entered the scope of the class, we must restore
13407 the bindings for any template parameters surrounding DECL1, if it
13408 is an inline member template. (Order is important; consider the
13409 case where a template parameter has the same name as a field of
13410 the class.) It is not until after this point that
13411 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13412 if (flags
& SF_INCLASS_INLINE
)
13413 maybe_begin_member_template_processing (decl1
);
13415 /* Effective C++ rule 15. */
13417 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13418 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13419 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13421 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13422 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13423 if (!DECL_INITIAL (decl1
))
13424 DECL_INITIAL (decl1
) = error_mark_node
;
13426 /* This function exists in static storage.
13427 (This does not mean `static' in the C sense!) */
13428 TREE_STATIC (decl1
) = 1;
13430 /* We must call push_template_decl after current_class_type is set
13431 up. (If we are processing inline definitions after exiting a
13432 class scope, current_class_type will be NULL_TREE until set above
13433 by push_nested_class.) */
13434 if (processing_template_decl
)
13436 tree newdecl1
= push_template_decl (decl1
);
13437 if (newdecl1
== error_mark_node
)
13439 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13440 pop_nested_class ();
13446 /* We are now in the scope of the function being defined. */
13447 current_function_decl
= decl1
;
13449 /* Save the parm names or decls from this function's declarator
13450 where store_parm_decls will find them. */
13451 current_function_parms
= DECL_ARGUMENTS (decl1
);
13453 /* Make sure the parameter and return types are reasonable. When
13454 you declare a function, these types can be incomplete, but they
13455 must be complete when you define the function. */
13456 check_function_type (decl1
, current_function_parms
);
13458 /* Build the return declaration for the function. */
13459 restype
= TREE_TYPE (fntype
);
13461 if (DECL_RESULT (decl1
) == NULL_TREE
)
13465 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13466 DECL_ARTIFICIAL (resdecl
) = 1;
13467 DECL_IGNORED_P (resdecl
) = 1;
13468 DECL_RESULT (decl1
) = resdecl
;
13470 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13473 /* Let the user know we're compiling this function. */
13474 announce_function (decl1
);
13476 /* Record the decl so that the function name is defined.
13477 If we already have a decl for this name, and it is a FUNCTION_DECL,
13478 use the old decl. */
13479 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13481 /* A specialization is not used to guide overload resolution. */
13482 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13483 && !(DECL_USE_TEMPLATE (decl1
) &&
13484 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13486 tree olddecl
= pushdecl (decl1
);
13488 if (olddecl
== error_mark_node
)
13489 /* If something went wrong when registering the declaration,
13490 use DECL1; we have to have a FUNCTION_DECL to use when
13491 parsing the body of the function. */
13495 /* Otherwise, OLDDECL is either a previous declaration
13496 of the same function or DECL1 itself. */
13498 if (warn_missing_declarations
13499 && olddecl
== decl1
13500 && !DECL_MAIN_P (decl1
)
13501 && TREE_PUBLIC (decl1
)
13502 && !DECL_DECLARED_INLINE_P (decl1
))
13506 /* Check whether DECL1 is in an anonymous
13508 for (context
= DECL_CONTEXT (decl1
);
13510 context
= DECL_CONTEXT (context
))
13512 if (TREE_CODE (context
) == NAMESPACE_DECL
13513 && DECL_NAME (context
) == NULL_TREE
)
13517 if (context
== NULL
)
13518 warning (OPT_Wmissing_declarations
,
13519 "no previous declaration for %q+D", decl1
);
13527 /* We need to set the DECL_CONTEXT. */
13528 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13529 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13531 fntype
= TREE_TYPE (decl1
);
13532 restype
= TREE_TYPE (fntype
);
13534 /* If #pragma weak applies, mark the decl appropriately now.
13535 The pragma only applies to global functions. Because
13536 determining whether or not the #pragma applies involves
13537 computing the mangled name for the declaration, we cannot
13538 apply the pragma until after we have merged this declaration
13539 with any previous declarations; if the original declaration
13540 has a linkage specification, that specification applies to
13541 the definition as well, and may affect the mangled name. */
13542 if (DECL_FILE_SCOPE_P (decl1
))
13543 maybe_apply_pragma_weak (decl1
);
13546 /* Reset this in case the call to pushdecl changed it. */
13547 current_function_decl
= decl1
;
13549 gcc_assert (DECL_INITIAL (decl1
));
13551 /* This function may already have been parsed, in which case just
13552 return; our caller will skip over the body without parsing. */
13553 if (DECL_INITIAL (decl1
) != error_mark_node
)
13556 /* Initialize RTL machinery. We cannot do this until
13557 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13558 even when processing a template; this is how we get
13559 CFUN set up, and our per-function variables initialized.
13560 FIXME factor out the non-RTL stuff. */
13561 bl
= current_binding_level
;
13562 allocate_struct_function (decl1
, processing_template_decl
);
13564 /* Initialize the language data structures. Whenever we start
13565 a new function, we destroy temporaries in the usual way. */
13566 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13567 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13568 current_binding_level
= bl
;
13570 if (!processing_template_decl
&& type_uses_auto (restype
))
13572 FNDECL_USED_AUTO (decl1
) = true;
13573 current_function_auto_return_pattern
= restype
;
13576 /* Start the statement-tree, start the tree now. */
13577 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13579 /* If we are (erroneously) defining a function that we have already
13580 defined before, wipe out what we knew before. */
13581 if (!DECL_PENDING_INLINE_P (decl1
))
13582 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13584 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13586 /* We know that this was set up by `grokclassfn'. We do not
13587 wait until `store_parm_decls', since evil parse errors may
13588 never get us to that point. Here we keep the consistency
13589 between `current_class_type' and `current_class_ptr'. */
13590 tree t
= DECL_ARGUMENTS (decl1
);
13592 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13593 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13595 cp_function_chain
->x_current_class_ref
13596 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13597 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13598 cp_function_chain
->x_current_class_ptr
= t
;
13600 /* Constructors and destructors need to know whether they're "in
13601 charge" of initializing virtual base classes. */
13602 t
= DECL_CHAIN (t
);
13603 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13605 current_in_charge_parm
= t
;
13606 t
= DECL_CHAIN (t
);
13608 if (DECL_HAS_VTT_PARM_P (decl1
))
13610 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13611 current_vtt_parm
= t
;
13615 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13616 /* Implicitly-defined methods (like the
13617 destructor for a class in which no destructor
13618 is explicitly declared) must not be defined
13619 until their definition is needed. So, we
13620 ignore interface specifications for
13621 compiler-generated functions. */
13622 && !DECL_ARTIFICIAL (decl1
));
13624 if (processing_template_decl
)
13625 /* Don't mess with interface flags. */;
13626 else if (DECL_INTERFACE_KNOWN (decl1
))
13628 tree ctx
= decl_function_context (decl1
);
13630 if (DECL_NOT_REALLY_EXTERN (decl1
))
13631 DECL_EXTERNAL (decl1
) = 0;
13633 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13634 /* This is a function in a local class in an extern inline
13635 or template function. */
13636 comdat_linkage (decl1
);
13638 /* If this function belongs to an interface, it is public.
13639 If it belongs to someone else's interface, it is also external.
13640 This only affects inlines and template instantiations. */
13641 else if (!finfo
->interface_unknown
&& honor_interface
)
13643 if (DECL_DECLARED_INLINE_P (decl1
)
13644 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13646 DECL_EXTERNAL (decl1
)
13647 = (finfo
->interface_only
13648 || (DECL_DECLARED_INLINE_P (decl1
)
13649 && ! flag_implement_inlines
13650 && !DECL_VINDEX (decl1
)));
13652 /* For WIN32 we also want to put these in linkonce sections. */
13653 maybe_make_one_only (decl1
);
13656 DECL_EXTERNAL (decl1
) = 0;
13657 DECL_INTERFACE_KNOWN (decl1
) = 1;
13658 /* If this function is in an interface implemented in this file,
13659 make sure that the back end knows to emit this function
13661 if (!DECL_EXTERNAL (decl1
))
13662 mark_needed (decl1
);
13664 else if (finfo
->interface_unknown
&& finfo
->interface_only
13665 && honor_interface
)
13667 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13668 interface, we will have both finfo->interface_unknown and
13669 finfo->interface_only set. In that case, we don't want to
13670 use the normal heuristics because someone will supply a
13671 #pragma implementation elsewhere, and deducing it here would
13672 produce a conflict. */
13673 comdat_linkage (decl1
);
13674 DECL_EXTERNAL (decl1
) = 0;
13675 DECL_INTERFACE_KNOWN (decl1
) = 1;
13676 DECL_DEFER_OUTPUT (decl1
) = 1;
13680 /* This is a definition, not a reference.
13681 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13682 if (!GNU_INLINE_P (decl1
))
13683 DECL_EXTERNAL (decl1
) = 0;
13685 if ((DECL_DECLARED_INLINE_P (decl1
)
13686 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13687 && ! DECL_INTERFACE_KNOWN (decl1
))
13688 DECL_DEFER_OUTPUT (decl1
) = 1;
13690 DECL_INTERFACE_KNOWN (decl1
) = 1;
13693 /* Determine the ELF visibility attribute for the function. We must not
13694 do this before calling "pushdecl", as we must allow "duplicate_decls"
13695 to merge any attributes appropriately. We also need to wait until
13697 if (!DECL_CLONED_FUNCTION_P (decl1
))
13698 determine_visibility (decl1
);
13700 if (!processing_template_decl
)
13701 maybe_instantiate_noexcept (decl1
);
13703 begin_scope (sk_function_parms
, decl1
);
13707 if (DECL_DESTRUCTOR_P (decl1
)
13708 || (DECL_CONSTRUCTOR_P (decl1
)
13709 && targetm
.cxx
.cdtor_returns_this ()))
13711 cdtor_label
= create_artificial_label (input_location
);
13714 start_fname_decls ();
13716 store_parm_decls (current_function_parms
);
13718 if (!processing_template_decl
13719 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
))
13721 /* Insert a clobber to let the back end know that the object storage
13722 is dead when we enter the constructor. */
13723 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13724 tree clobber
= build_constructor (btype
, NULL
);
13725 TREE_THIS_VOLATILE (clobber
) = true;
13726 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13727 bref
= convert_from_reference (bref
);
13728 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13729 finish_expr_stmt (exprstmt
);
13736 /* Like start_preparsed_function, except that instead of a
13737 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13739 Returns true on success. If the DECLARATOR is not suitable
13740 for a function, we return false, which tells the parser to
13741 skip the entire function. */
13744 start_function (cp_decl_specifier_seq
*declspecs
,
13745 const cp_declarator
*declarator
,
13750 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13751 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
13752 if (decl1
== error_mark_node
)
13754 /* If the declarator is not suitable for a function definition,
13755 cause a syntax error. */
13756 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13758 error ("invalid function declaration");
13762 if (DECL_MAIN_P (decl1
))
13763 /* main must return int. grokfndecl should have corrected it
13764 (and issued a diagnostic) if the user got it wrong. */
13765 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13766 integer_type_node
));
13768 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13771 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13775 use_eh_spec_block (tree fn
)
13777 return (flag_exceptions
&& flag_enforce_eh_specs
13778 && !processing_template_decl
13779 && !type_throw_all_p (TREE_TYPE (fn
))
13780 /* We insert the EH_SPEC_BLOCK only in the original
13781 function; then, it is copied automatically to the
13783 && !DECL_CLONED_FUNCTION_P (fn
)
13784 /* Implicitly-generated constructors and destructors have
13785 exception specifications. However, those specifications
13786 are the union of the possible exceptions specified by the
13787 constructors/destructors for bases and members, so no
13788 unallowed exception will ever reach this function. By
13789 not creating the EH_SPEC_BLOCK we save a little memory,
13790 and we avoid spurious warnings about unreachable
13792 && !DECL_DEFAULTED_FN (fn
));
13795 /* Store the parameter declarations into the current function declaration.
13796 This is called after parsing the parameter declarations, before
13797 digesting the body of the function.
13799 Also install to binding contour return value identifier, if any. */
13802 store_parm_decls (tree current_function_parms
)
13804 tree fndecl
= current_function_decl
;
13807 /* This is a chain of any other decls that came in among the parm
13808 declarations. If a parm is declared with enum {foo, bar} x;
13809 then CONST_DECLs for foo and bar are put here. */
13810 tree nonparms
= NULL_TREE
;
13812 if (current_function_parms
)
13814 /* This case is when the function was defined with an ANSI prototype.
13815 The parms already have decls, so we need not do anything here
13816 except record them as in effect
13817 and complain if any redundant old-style parm decls were written. */
13819 tree specparms
= current_function_parms
;
13822 /* Must clear this because it might contain TYPE_DECLs declared
13824 current_binding_level
->names
= NULL
;
13826 /* If we're doing semantic analysis, then we'll call pushdecl
13827 for each of these. We must do them in reverse order so that
13828 they end in the correct forward order. */
13829 specparms
= nreverse (specparms
);
13831 for (parm
= specparms
; parm
; parm
= next
)
13833 next
= DECL_CHAIN (parm
);
13834 if (TREE_CODE (parm
) == PARM_DECL
)
13836 if (DECL_NAME (parm
) == NULL_TREE
13837 || !VOID_TYPE_P (parm
))
13840 error ("parameter %qD declared void", parm
);
13844 /* If we find an enum constant or a type tag,
13845 put it aside for the moment. */
13846 TREE_CHAIN (parm
) = NULL_TREE
;
13847 nonparms
= chainon (nonparms
, parm
);
13851 /* Get the decls in their original chain order and record in the
13852 function. This is all and only the PARM_DECLs that were
13853 pushed into scope by the loop above. */
13854 DECL_ARGUMENTS (fndecl
) = getdecls ();
13857 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13859 /* Now store the final chain of decls for the arguments
13860 as the decl-chain of the current lexical scope.
13861 Put the enumerators in as well, at the front so that
13862 DECL_ARGUMENTS is not modified. */
13863 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13865 if (use_eh_spec_block (current_function_decl
))
13866 current_eh_spec_block
= begin_eh_spec_block ();
13870 /* We have finished doing semantic analysis on DECL, but have not yet
13871 generated RTL for its body. Save away our current state, so that
13872 when we want to generate RTL later we know what to do. */
13875 save_function_data (tree decl
)
13877 struct language_function
*f
;
13879 /* Save the language-specific per-function data so that we can
13880 get it back when we really expand this function. */
13881 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13884 f
= ggc_alloc
<language_function
> ();
13885 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13886 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13888 /* Clear out the bits we don't need. */
13889 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13890 f
->bindings
= NULL
;
13891 f
->x_local_names
= NULL
;
13892 f
->base
.local_typedefs
= NULL
;
13896 /* Set the return value of the constructor (if present). */
13899 finish_constructor_body (void)
13904 if (targetm
.cxx
.cdtor_returns_this ()
13905 && (! TYPE_FOR_JAVA (current_class_type
)))
13907 /* Any return from a constructor will end up here. */
13908 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13910 val
= DECL_ARGUMENTS (current_function_decl
);
13911 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13912 DECL_RESULT (current_function_decl
), val
);
13913 /* Return the address of the object. */
13914 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13915 add_stmt (exprstmt
);
13919 /* Do all the processing for the beginning of a destructor; set up the
13920 vtable pointers and cleanups for bases and members. */
13923 begin_destructor_body (void)
13925 tree compound_stmt
;
13927 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13928 issued an error message. We still want to try to process the
13929 body of the function, but initialize_vtbl_ptrs will crash if
13930 TYPE_BINFO is NULL. */
13931 if (COMPLETE_TYPE_P (current_class_type
))
13933 compound_stmt
= begin_compound_stmt (0);
13934 /* Make all virtual function table pointers in non-virtual base
13935 classes point to CURRENT_CLASS_TYPE's virtual function
13937 initialize_vtbl_ptrs (current_class_ptr
);
13938 finish_compound_stmt (compound_stmt
);
13940 if (flag_lifetime_dse
)
13942 /* Insert a cleanup to let the back end know that the object is dead
13943 when we exit the destructor, either normally or via exception. */
13944 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13945 tree clobber
= build_constructor (btype
, NULL
);
13946 TREE_THIS_VOLATILE (clobber
) = true;
13947 tree bref
= build_nop (build_reference_type (btype
),
13948 current_class_ptr
);
13949 bref
= convert_from_reference (bref
);
13950 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13951 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13954 /* And insert cleanups for our bases and members so that they
13955 will be properly destroyed if we throw. */
13956 push_base_cleanups ();
13960 /* At the end of every destructor we generate code to delete the object if
13961 necessary. Do that now. */
13964 finish_destructor_body (void)
13968 /* Any return from a destructor will end up here; that way all base
13969 and member cleanups will be run when the function returns. */
13970 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13972 /* In a virtual destructor, we must call delete. */
13973 if (DECL_VIRTUAL_P (current_function_decl
))
13976 tree virtual_size
= cxx_sizeof (current_class_type
);
13980 At the point of definition of a virtual destructor (including
13981 an implicit definition), non-placement operator delete shall
13982 be looked up in the scope of the destructor's class and if
13983 found shall be accessible and unambiguous. */
13984 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13986 /*global_p=*/false,
13987 /*placement=*/NULL_TREE
,
13988 /*alloc_fn=*/NULL_TREE
,
13989 tf_warning_or_error
);
13991 if_stmt
= begin_if_stmt ();
13992 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13993 current_in_charge_parm
,
13996 finish_expr_stmt (exprstmt
);
13997 finish_then_clause (if_stmt
);
13998 finish_if_stmt (if_stmt
);
14001 if (targetm
.cxx
.cdtor_returns_this ())
14005 val
= DECL_ARGUMENTS (current_function_decl
);
14006 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14007 DECL_RESULT (current_function_decl
), val
);
14008 /* Return the address of the object. */
14009 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14010 add_stmt (exprstmt
);
14014 /* Do the necessary processing for the beginning of a function body, which
14015 in this case includes member-initializers, but not the catch clauses of
14016 a function-try-block. Currently, this means opening a binding level
14017 for the member-initializers (in a ctor), member cleanups (in a dtor),
14018 and capture proxies (in a lambda operator()). */
14021 begin_function_body (void)
14025 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14028 if (processing_template_decl
)
14029 /* Do nothing now. */;
14031 /* Always keep the BLOCK node associated with the outermost pair of
14032 curly braces of a function. These are needed for correct
14033 operation of dwarfout.c. */
14034 keep_next_level (true);
14036 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14038 if (processing_template_decl
)
14039 /* Do nothing now. */;
14040 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14041 begin_destructor_body ();
14046 /* Do the processing for the end of a function body. Currently, this means
14047 closing out the cleanups for fully-constructed bases and members, and in
14048 the case of the destructor, deleting the object if desired. Again, this
14049 is only meaningful for [cd]tors, since they are the only functions where
14050 there is a significant distinction between the main body and any
14051 function catch clauses. Handling, say, main() return semantics here
14052 would be wrong, as flowing off the end of a function catch clause for
14053 main() would also need to return 0. */
14056 finish_function_body (tree compstmt
)
14058 if (compstmt
== NULL_TREE
)
14061 /* Close the block. */
14062 finish_compound_stmt (compstmt
);
14064 if (processing_template_decl
)
14065 /* Do nothing now. */;
14066 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14067 finish_constructor_body ();
14068 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14069 finish_destructor_body ();
14072 /* Given a function, returns the BLOCK corresponding to the outermost level
14073 of curly braces, skipping the artificial block created for constructor
14077 outer_curly_brace_block (tree fndecl
)
14079 tree block
= DECL_INITIAL (fndecl
);
14080 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14082 block
= BLOCK_SUBBLOCKS (block
);
14083 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14085 block
= BLOCK_SUBBLOCKS (block
);
14086 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14090 /* If FNDECL is a class's key method, add the class to the list of
14091 keyed classes that should be emitted. */
14094 record_key_method_defined (tree fndecl
)
14096 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14097 && DECL_VIRTUAL_P (fndecl
)
14098 && !processing_template_decl
)
14100 tree fnclass
= DECL_CONTEXT (fndecl
);
14101 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14102 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14106 /* Subroutine of finish_function.
14107 Save the body of constexpr functions for possible
14108 future compile time evaluation. */
14111 maybe_save_function_definition (tree fun
)
14113 if (!processing_template_decl
14114 && DECL_DECLARED_CONSTEXPR_P (fun
)
14115 && !cp_function_chain
->invalid_constexpr
14116 && !DECL_CLONED_FUNCTION_P (fun
))
14117 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14120 /* Finish up a function declaration and compile that function
14121 all the way to assembler language output. The free the storage
14122 for the function definition.
14124 FLAGS is a bitwise or of the following values:
14126 We just finished processing the body of an in-class inline
14127 function definition. (This processing will have taken place
14128 after the class definition is complete.) */
14131 finish_function (int flags
)
14133 tree fndecl
= current_function_decl
;
14134 tree fntype
, ctype
= NULL_TREE
;
14135 int inclass_inline
= (flags
& 2) != 0;
14137 /* When we get some parse errors, we can end up without a
14138 current_function_decl, so cope. */
14139 if (fndecl
== NULL_TREE
)
14140 return error_mark_node
;
14142 if (c_dialect_objc ())
14143 objc_finish_function ();
14145 gcc_assert (!defer_mark_used_calls
);
14146 defer_mark_used_calls
= true;
14148 record_key_method_defined (fndecl
);
14150 fntype
= TREE_TYPE (fndecl
);
14152 /* TREE_READONLY (fndecl) = 1;
14153 This caused &foo to be of type ptr-to-const-function
14154 which then got a warning when stored in a ptr-to-function variable. */
14156 gcc_assert (building_stmt_list_p ());
14157 /* The current function is being defined, so its DECL_INITIAL should
14158 be set, and unless there's a multiple definition, it should be
14159 error_mark_node. */
14160 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14162 /* For a cloned function, we've already got all the code we need;
14163 there's no need to add any extra bits. */
14164 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14166 /* Make it so that `main' always returns 0 by default. */
14167 if (DECL_MAIN_P (current_function_decl
))
14168 finish_return_stmt (integer_zero_node
);
14170 if (use_eh_spec_block (current_function_decl
))
14171 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14172 (TREE_TYPE (current_function_decl
)),
14173 current_eh_spec_block
);
14176 /* If we're saving up tree structure, tie off the function now. */
14177 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14179 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14180 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14182 finish_fname_decls ();
14184 /* If this function can't throw any exceptions, remember that. */
14185 if (!processing_template_decl
14186 && !cp_function_chain
->can_throw
14187 && !flag_non_call_exceptions
14188 && !decl_replaceable_p (fndecl
))
14189 TREE_NOTHROW (fndecl
) = 1;
14191 /* This must come after expand_function_end because cleanups might
14192 have declarations (from inline functions) that need to go into
14193 this function's blocks. */
14195 /* If the current binding level isn't the outermost binding level
14196 for this function, either there is a bug, or we have experienced
14197 syntax errors and the statement tree is malformed. */
14198 if (current_binding_level
->kind
!= sk_function_parms
)
14200 /* Make sure we have already experienced errors. */
14201 gcc_assert (errorcount
);
14203 /* Throw away the broken statement tree and extra binding
14205 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14207 while (current_binding_level
->kind
!= sk_function_parms
)
14209 if (current_binding_level
->kind
== sk_class
)
14210 pop_nested_class ();
14212 poplevel (0, 0, 0);
14215 poplevel (1, 0, 1);
14217 /* Statements should always be full-expressions at the outermost set
14218 of curly braces for a function. */
14219 gcc_assert (stmts_are_full_exprs_p ());
14221 /* If there are no return statements in a function with auto return type,
14222 the return type is void. But if the declared type is something like
14223 auto*, this is an error. */
14224 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14225 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14227 if (!is_auto (current_function_auto_return_pattern
)
14228 && !current_function_returns_value
&& !current_function_returns_null
)
14230 error ("no return statements in function returning %qT",
14231 current_function_auto_return_pattern
);
14232 inform (input_location
, "only plain %<auto%> return type can be "
14233 "deduced to %<void%>");
14235 apply_deduced_return_type (fndecl
, void_type_node
);
14236 fntype
= TREE_TYPE (fndecl
);
14239 /* Save constexpr function body before it gets munged by
14240 the NRV transformation. */
14241 maybe_save_function_definition (fndecl
);
14243 /* Set up the named return value optimization, if we can. Candidate
14244 variables are selected in check_return_expr. */
14245 if (current_function_return_value
)
14247 tree r
= current_function_return_value
;
14250 if (r
!= error_mark_node
14251 /* This is only worth doing for fns that return in memory--and
14252 simpler, since we don't have to worry about promoted modes. */
14253 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14254 /* Only allow this for variables declared in the outer scope of
14255 the function so we know that their lifetime always ends with a
14256 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14257 we were to do this optimization in tree-ssa. */
14258 && (outer
= outer_curly_brace_block (fndecl
))
14259 && chain_member (r
, BLOCK_VARS (outer
)))
14260 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14262 current_function_return_value
= NULL_TREE
;
14265 /* Remember that we were in class scope. */
14266 if (current_class_name
)
14267 ctype
= current_class_type
;
14269 /* Must mark the RESULT_DECL as being in this function. */
14270 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14272 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14273 to the FUNCTION_DECL node itself. */
14274 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14276 /* Save away current state, if appropriate. */
14277 if (!processing_template_decl
)
14278 save_function_data (fndecl
);
14280 /* Complain if there's just no return statement. */
14281 if (warn_return_type
14282 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14283 && !dependent_type_p (TREE_TYPE (fntype
))
14284 && !current_function_returns_value
&& !current_function_returns_null
14285 /* Don't complain if we abort or throw. */
14286 && !current_function_returns_abnormally
14287 /* Don't complain if there's an infinite loop. */
14288 && !current_function_infinite_loop
14289 /* Don't complain if we are declared noreturn. */
14290 && !TREE_THIS_VOLATILE (fndecl
)
14291 && !DECL_NAME (DECL_RESULT (fndecl
))
14292 && !TREE_NO_WARNING (fndecl
)
14293 /* Structor return values (if any) are set by the compiler. */
14294 && !DECL_CONSTRUCTOR_P (fndecl
)
14295 && !DECL_DESTRUCTOR_P (fndecl
)
14296 && targetm
.warn_func_return (fndecl
))
14298 warning (OPT_Wreturn_type
,
14299 "no return statement in function returning non-void");
14300 TREE_NO_WARNING (fndecl
) = 1;
14303 /* Store the end of the function, so that we get good line number
14304 info for the epilogue. */
14305 cfun
->function_end_locus
= input_location
;
14307 /* Complain about parameters that are only set, but never otherwise used. */
14308 if (warn_unused_but_set_parameter
14309 && !processing_template_decl
14310 && errorcount
== unused_but_set_errorcount
14311 && !DECL_CLONED_FUNCTION_P (fndecl
))
14315 for (decl
= DECL_ARGUMENTS (fndecl
);
14317 decl
= DECL_CHAIN (decl
))
14318 if (TREE_USED (decl
)
14319 && TREE_CODE (decl
) == PARM_DECL
14320 && !DECL_READ_P (decl
)
14321 && DECL_NAME (decl
)
14322 && !DECL_ARTIFICIAL (decl
)
14323 && !TREE_NO_WARNING (decl
)
14324 && !DECL_IN_SYSTEM_HEADER (decl
)
14325 && TREE_TYPE (decl
) != error_mark_node
14326 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14327 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14328 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14329 warning (OPT_Wunused_but_set_parameter
,
14330 "parameter %q+D set but not used", decl
);
14331 unused_but_set_errorcount
= errorcount
;
14334 /* Complain about locally defined typedefs that are not used in this
14336 maybe_warn_unused_local_typedefs ();
14338 /* Genericize before inlining. */
14339 if (!processing_template_decl
)
14341 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14342 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14343 cp_genericize (fndecl
);
14344 /* Clear out the bits we don't need. */
14345 f
->x_current_class_ptr
= NULL
;
14346 f
->x_current_class_ref
= NULL
;
14347 f
->x_eh_spec_block
= NULL
;
14348 f
->x_in_charge_parm
= NULL
;
14349 f
->x_vtt_parm
= NULL
;
14350 f
->x_return_value
= NULL
;
14351 f
->bindings
= NULL
;
14352 f
->extern_decl_map
= NULL
;
14353 f
->infinite_loops
= NULL
;
14355 /* Clear out the bits we don't need. */
14356 local_names
= NULL
;
14358 /* We're leaving the context of this function, so zap cfun. It's still in
14359 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14361 current_function_decl
= NULL
;
14363 /* If this is an in-class inline definition, we may have to pop the
14364 bindings for the template parameters that we added in
14365 maybe_begin_member_template_processing when start_function was
14367 if (inclass_inline
)
14368 maybe_end_member_template_processing ();
14370 /* Leave the scope of the class. */
14372 pop_nested_class ();
14377 current_function_decl
= NULL_TREE
;
14379 defer_mark_used_calls
= false;
14380 if (deferred_mark_used_calls
)
14385 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14387 vec_free (deferred_mark_used_calls
);
14390 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14394 /* Create the FUNCTION_DECL for a function definition.
14395 DECLSPECS and DECLARATOR are the parts of the declaration;
14396 they describe the return type and the name of the function,
14397 but twisted together in a fashion that parallels the syntax of C.
14399 This function creates a binding context for the function body
14400 as well as setting up the FUNCTION_DECL in current_function_decl.
14402 Returns a FUNCTION_DECL on success.
14404 If the DECLARATOR is not suitable for a function (it defines a datum
14405 instead), we return 0, which tells yyparse to report a parse error.
14407 May return void_type_node indicating that this method is actually
14408 a friend. See grokfield for more details.
14410 Came here with a `.pushlevel' .
14412 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14413 CHANGES TO CODE IN `grokfield'. */
14416 grokmethod (cp_decl_specifier_seq
*declspecs
,
14417 const cp_declarator
*declarator
, tree attrlist
)
14419 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14422 if (fndecl
== error_mark_node
)
14423 return error_mark_node
;
14425 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14427 error ("invalid member function declaration");
14428 return error_mark_node
;
14432 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14434 /* Pass friends other than inline friend functions back. */
14435 if (fndecl
== void_type_node
)
14438 if (DECL_IN_AGGR_P (fndecl
))
14440 if (DECL_CLASS_SCOPE_P (fndecl
))
14441 error ("%qD is already defined in class %qT", fndecl
,
14442 DECL_CONTEXT (fndecl
));
14443 return error_mark_node
;
14446 check_template_shadow (fndecl
);
14448 if (TREE_PUBLIC (fndecl
))
14449 DECL_COMDAT (fndecl
) = 1;
14450 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14451 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14453 /* We process method specializations in finish_struct_1. */
14454 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14456 fndecl
= push_template_decl (fndecl
);
14457 if (fndecl
== error_mark_node
)
14461 if (! DECL_FRIEND_P (fndecl
))
14463 if (DECL_CHAIN (fndecl
))
14465 fndecl
= copy_node (fndecl
);
14466 TREE_CHAIN (fndecl
) = NULL_TREE
;
14470 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14472 DECL_IN_AGGR_P (fndecl
) = 1;
14477 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14478 we can lay it out later, when and if its type becomes complete.
14480 Also handle constexpr variables where the initializer involves
14481 an unlowered PTRMEM_CST because the class isn't complete yet. */
14484 maybe_register_incomplete_var (tree var
)
14486 gcc_assert (VAR_P (var
));
14488 /* Keep track of variables with incomplete types. */
14489 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14490 && DECL_EXTERNAL (var
))
14492 tree inner_type
= TREE_TYPE (var
);
14494 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14495 inner_type
= TREE_TYPE (inner_type
);
14496 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14498 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14499 /* RTTI TD entries are created while defining the type_info. */
14500 || (TYPE_LANG_SPECIFIC (inner_type
)
14501 && TYPE_BEING_DEFINED (inner_type
)))
14503 incomplete_var iv
= {var
, inner_type
};
14504 vec_safe_push (incomplete_vars
, iv
);
14506 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14507 && decl_constant_var_p (var
)
14508 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14510 /* When the outermost open class is complete we can resolve any
14511 pointers-to-members. */
14512 tree context
= outermost_open_class ();
14513 incomplete_var iv
= {var
, context
};
14514 vec_safe_push (incomplete_vars
, iv
);
14519 /* Called when a class type (given by TYPE) is defined. If there are
14520 any existing VAR_DECLs whose type has been completed by this
14521 declaration, update them now. */
14524 complete_vars (tree type
)
14527 incomplete_var
*iv
;
14529 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14531 if (same_type_p (type
, iv
->incomplete_type
))
14533 tree var
= iv
->decl
;
14534 tree type
= TREE_TYPE (var
);
14536 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14537 == iv
->incomplete_type
)
14539 /* Complete the type of the variable. The VAR_DECL itself
14540 will be laid out in expand_expr. */
14541 complete_type (type
);
14542 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14545 if (DECL_INITIAL (var
)
14546 && decl_constant_var_p (var
))
14547 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14549 /* Remove this entry from the list. */
14550 incomplete_vars
->unordered_remove (ix
);
14556 /* Check for pending declarations which may have abstract type. */
14557 complete_type_check_abstract (type
);
14560 /* If DECL is of a type which needs a cleanup, build and return an
14561 expression to perform that cleanup here. Return NULL_TREE if no
14562 cleanup need be done. */
14565 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14571 /* Assume no cleanup is required. */
14572 cleanup
= NULL_TREE
;
14574 if (error_operand_p (decl
))
14577 /* Handle "__attribute__((cleanup))". We run the cleanup function
14578 before the destructor since the destructor is what actually
14579 terminates the lifetime of the object. */
14580 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14587 /* Get the name specified by the user for the cleanup function. */
14588 id
= TREE_VALUE (TREE_VALUE (attr
));
14589 /* Look up the name to find the cleanup function to call. It is
14590 important to use lookup_name here because that is what is
14591 used in c-common.c:handle_cleanup_attribute when performing
14592 initial checks on the attribute. Note that those checks
14593 include ensuring that the function found is not an overloaded
14594 function, or an object with an overloaded call operator,
14595 etc.; we can rely on the fact that the function found is an
14596 ordinary FUNCTION_DECL. */
14597 fn
= lookup_name (id
);
14598 arg
= build_address (decl
);
14599 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14600 return error_mark_node
;
14601 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14602 if (cleanup
== error_mark_node
)
14603 return error_mark_node
;
14605 /* Handle ordinary C++ destructors. */
14606 type
= TREE_TYPE (decl
);
14607 if (type_build_dtor_call (type
))
14609 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14613 if (TREE_CODE (type
) == ARRAY_TYPE
)
14616 addr
= build_address (decl
);
14618 call
= build_delete (TREE_TYPE (addr
), addr
,
14619 sfk_complete_destructor
, flags
, 0, complain
);
14620 if (call
== error_mark_node
)
14621 cleanup
= error_mark_node
;
14622 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14623 /* Discard the call. */;
14625 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14630 /* build_delete sets the location of the destructor call to the
14631 current location, even though the destructor is going to be
14632 called later, at the end of the current scope. This can lead to
14633 a "jumpy" behaviour for users of debuggers when they step around
14634 the end of the block. So let's unset the location of the
14635 destructor call instead. */
14636 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14637 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14640 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14641 /* Treat objects with destructors as used; the destructor may do
14642 something substantive. */
14643 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14644 return error_mark_node
;
14650 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14651 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14652 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14655 static_fn_type (tree memfntype
)
14660 if (TYPE_PTRMEMFUNC_P (memfntype
))
14661 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14662 if (POINTER_TYPE_P (memfntype
)
14663 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14664 memfntype
= TREE_TYPE (memfntype
);
14665 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14667 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14668 args
= TYPE_ARG_TYPES (memfntype
);
14669 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14670 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14671 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14672 fntype
= (cp_build_type_attribute_variant
14673 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14674 fntype
= (build_exception_variant
14675 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14676 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14677 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14681 /* DECL was originally constructed as a non-static member function,
14682 but turned out to be static. Update it accordingly. */
14685 revert_static_member_fn (tree decl
)
14687 tree stype
= static_fn_type (decl
);
14688 cp_cv_quals quals
= type_memfn_quals (stype
);
14689 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14691 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14692 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14694 TREE_TYPE (decl
) = stype
;
14696 if (DECL_ARGUMENTS (decl
))
14697 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14698 DECL_STATIC_FUNCTION_P (decl
) = 1;
14701 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14702 one of the language-independent trees. */
14704 enum cp_tree_node_structure_enum
14705 cp_tree_node_structure (union lang_tree_node
* t
)
14707 switch (TREE_CODE (&t
->generic
))
14709 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14710 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14711 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14712 case OVERLOAD
: return TS_CP_OVERLOAD
;
14713 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14714 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14715 case BASELINK
: return TS_CP_BASELINK
;
14716 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14717 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14718 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14719 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14720 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14721 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14722 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14723 default: return TS_CP_GENERIC
;
14727 /* Build the void_list_node (void_type_node having been created). */
14729 build_void_list_node (void)
14731 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14736 cp_missing_noreturn_ok_p (tree decl
)
14738 /* A missing noreturn is ok for the `main' function. */
14739 return DECL_MAIN_P (decl
);
14742 /* Return the decl used to identify the COMDAT group into which DECL should
14746 cxx_comdat_group (tree decl
)
14748 /* Virtual tables, construction virtual tables, and virtual table
14749 tables all go in a single COMDAT group, named after the primary
14751 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14752 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14753 /* For all other DECLs, the COMDAT group is the mangled name of the
14754 declaration itself. */
14757 while (DECL_THUNK_P (decl
))
14759 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14760 into the same section as the target function. In that case
14761 we must return target's name. */
14762 tree target
= THUNK_TARGET (decl
);
14763 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14764 && DECL_SECTION_NAME (target
) != NULL
14765 && DECL_ONE_ONLY (target
))
14775 /* Returns the return type for FN as written by the user, which may include
14776 a placeholder for a deduced return type. */
14779 fndecl_declared_return_type (tree fn
)
14781 fn
= STRIP_TEMPLATE (fn
);
14782 if (FNDECL_USED_AUTO (fn
))
14784 struct language_function
*f
= NULL
;
14785 if (DECL_STRUCT_FUNCTION (fn
))
14786 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14788 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14789 return f
->x_auto_return_pattern
;
14791 return TREE_TYPE (TREE_TYPE (fn
));
14794 /* Returns true iff DECL was declared with an auto return type and it has
14795 not yet been deduced to a real type. */
14798 undeduced_auto_decl (tree decl
)
14800 if (cxx_dialect
< cxx14
)
14802 return type_uses_auto (TREE_TYPE (decl
));
14805 /* Complain if DECL has an undeduced return type. */
14808 require_deduced_type (tree decl
)
14810 if (undeduced_auto_decl (decl
))
14811 error ("use of %qD before deduction of %<auto%>", decl
);
14814 #include "gt-cp-decl.h"