1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2014 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"
34 #include "tree-hasher.h"
35 #include "stringpool.h"
36 #include "stor-layout.h"
42 #include "tree-iterator.h"
43 #include "tree-inline.h"
50 #include "c-family/c-common.h"
51 #include "c-family/c-objc.h"
52 #include "c-family/c-pragma.h"
53 #include "c-family/c-target.h"
54 #include "c-family/c-ubsan.h"
55 #include "diagnostic.h"
59 #include "splay-tree.h"
63 #include "plugin-api.h"
67 #include "hard-reg-set.h"
76 /* Possible cases of bad specifiers type used by bad_specifiers. */
78 BSP_VAR
, /* variable */
79 BSP_PARM
, /* parameter */
84 static tree
grokparms (tree parmlist
, tree
*);
85 static const char *redeclaration_error_message (tree
, tree
);
87 static int decl_jump_unsafe (tree
);
88 static void require_complete_types_for_parms (tree
);
89 static int ambi_op_p (enum tree_code
);
90 static int unary_op_p (enum tree_code
);
91 static void push_local_name (tree
);
92 static tree
grok_reference_init (tree
, tree
, tree
, int);
93 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
95 static int check_static_variable_definition (tree
, tree
);
96 static void record_unknown_type (tree
, const char *);
97 static tree
builtin_function_1 (tree
, tree
, bool);
98 static int member_function_or_else (tree
, tree
, enum overload_flags
);
99 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
101 static void check_for_uninitialized_const_var (tree
);
102 static tree
local_variable_p_walkfn (tree
*, int *, void *);
103 static tree
record_builtin_java_type (const char *, int);
104 static const char *tag_name (enum tag_types
);
105 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
106 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
107 static void maybe_deduce_size_from_array_init (tree
, tree
);
108 static void layout_var_decl (tree
);
109 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
110 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
111 static void save_function_data (tree
);
112 static void copy_type_enum (tree
, tree
);
113 static void check_function_type (tree
, tree
);
114 static void finish_constructor_body (void);
115 static void begin_destructor_body (void);
116 static void finish_destructor_body (void);
117 static void record_key_method_defined (tree
);
118 static tree
create_array_type_for_decl (tree
, tree
, tree
);
119 static tree
get_atexit_node (void);
120 static tree
get_dso_handle_node (void);
121 static tree
start_cleanup_fn (void);
122 static void end_cleanup_fn (void);
123 static tree
cp_make_fname_decl (location_t
, tree
, int);
124 static void initialize_predefined_identifiers (void);
125 static tree check_special_function_return_type
126 (special_function_kind
, tree
, tree
);
127 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
128 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
129 static void store_parm_decls (tree
);
130 static void initialize_local_var (tree
, tree
);
131 static void expand_static_init (tree
, tree
);
133 /* The following symbols are subsumed in the cp_global_trees array, and
134 listed here individually for documentation purposes.
137 tree wchar_decl_node;
139 tree vtable_entry_type;
140 tree delta_type_node;
141 tree __t_desc_type_node;
143 tree class_type_node;
144 tree unknown_type_node;
146 Array type `vtable_entry_type[]'
149 tree vtbl_ptr_type_node;
156 A FUNCTION_DECL which can call `abort'. Not necessarily the
157 one that the user will declare, but sufficient to be called
158 by routines that want to abort the program.
162 The FUNCTION_DECL for the default `::operator delete'.
164 tree global_delete_fndecl;
167 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
168 tree tinfo_var_id; */
170 tree cp_global_trees
[CPTI_MAX
];
172 /* Indicates that there is a type value in some namespace, although
173 that is not necessarily in scope at the moment. */
175 tree global_type_node
;
177 /* The node that holds the "name" of the global scope. */
178 tree global_scope_name
;
180 #define local_names cp_function_chain->x_local_names
182 /* A list of objects which have constructors or destructors
183 which reside in the global scope. The decl is stored in
184 the TREE_VALUE slot and the initializer is stored
185 in the TREE_PURPOSE slot. */
186 tree static_aggregates
;
188 /* Like static_aggregates, but for thread_local variables. */
193 /* A node for the integer constant 2. */
195 tree integer_two_node
;
197 /* Used only for jumps to as-yet undefined labels, since jumps to
198 defined labels can have their validity checked immediately. */
200 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
201 struct named_label_use_entry
*next
;
202 /* The binding level to which this entry is *currently* attached.
203 This is initially the binding level in which the goto appeared,
204 but is modified as scopes are closed. */
205 cp_binding_level
*binding_level
;
206 /* The head of the names list that was current when the goto appeared,
207 or the inner scope popped. These are the decls that will *not* be
208 skipped when jumping to the label. */
210 /* The location of the goto, for error reporting. */
211 location_t o_goto_locus
;
212 /* True if an OpenMP structured block scope has been closed since
213 the goto appeared. This means that the branch from the label will
214 illegally exit an OpenMP scope. */
218 /* A list of all LABEL_DECLs in the function that have names. Here so
219 we can clear out their names' definitions at the end of the
220 function, and so we can check the validity of jumps to these labels. */
222 struct GTY((for_user
)) named_label_entry
{
223 /* The decl itself. */
226 /* The binding level to which the label is *currently* attached.
227 This is initially set to the binding level in which the label
228 is defined, but is modified as scopes are closed. */
229 cp_binding_level
*binding_level
;
230 /* The head of the names list that was current when the label was
231 defined, or the inner scope popped. These are the decls that will
232 be skipped when jumping to the label. */
234 /* A vector of all decls from all binding levels that would be
235 crossed by a backward branch to the label. */
236 vec
<tree
, va_gc
> *bad_decls
;
238 /* A list of uses of the label, before the label is defined. */
239 struct named_label_use_entry
*uses
;
241 /* The following bits are set after the label is defined, and are
242 updated as scopes are popped. They indicate that a backward jump
243 to the label will illegally enter a scope of the given flavor. */
249 #define named_labels cp_function_chain->x_named_labels
251 /* The number of function bodies which we are currently processing.
252 (Zero if we are at namespace scope, one inside the body of a
253 function, two inside the body of a function in a local class, etc.) */
256 /* To avoid unwanted recursion, finish_function defers all mark_used calls
257 encountered during its execution until it finishes. */
258 bool defer_mark_used_calls
;
259 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
261 /* States indicating how grokdeclarator() should handle declspecs marked
262 with __attribute__((deprecated)). An object declared as
263 __attribute__((deprecated)) suppresses warnings of uses of other
265 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
268 /* A list of VAR_DECLs whose type was incomplete at the time the
269 variable was declared. */
271 typedef struct GTY(()) incomplete_var_d
{
273 tree incomplete_type
;
277 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
279 /* Returns the kind of template specialization we are currently
280 processing, given that it's declaration contained N_CLASS_SCOPES
281 explicit scope qualifications. */
284 current_tmpl_spec_kind (int n_class_scopes
)
286 int n_template_parm_scopes
= 0;
287 int seen_specialization_p
= 0;
288 int innermost_specialization_p
= 0;
291 /* Scan through the template parameter scopes. */
292 for (b
= current_binding_level
;
293 b
->kind
== sk_template_parms
;
296 /* If we see a specialization scope inside a parameter scope,
297 then something is wrong. That corresponds to a declaration
300 template <class T> template <> ...
302 which is always invalid since [temp.expl.spec] forbids the
303 specialization of a class member template if the enclosing
304 class templates are not explicitly specialized as well. */
305 if (b
->explicit_spec_p
)
307 if (n_template_parm_scopes
== 0)
308 innermost_specialization_p
= 1;
310 seen_specialization_p
= 1;
312 else if (seen_specialization_p
== 1)
313 return tsk_invalid_member_spec
;
315 ++n_template_parm_scopes
;
318 /* Handle explicit instantiations. */
319 if (processing_explicit_instantiation
)
321 if (n_template_parm_scopes
!= 0)
322 /* We've seen a template parameter list during an explicit
323 instantiation. For example:
325 template <class T> template void f(int);
327 This is erroneous. */
328 return tsk_invalid_expl_inst
;
330 return tsk_expl_inst
;
333 if (n_template_parm_scopes
< n_class_scopes
)
334 /* We've not seen enough template headers to match all the
335 specialized classes present. For example:
337 template <class T> void R<T>::S<T>::f(int);
339 This is invalid; there needs to be one set of template
340 parameters for each class. */
341 return tsk_insufficient_parms
;
342 else if (n_template_parm_scopes
== n_class_scopes
)
343 /* We're processing a non-template declaration (even though it may
344 be a member of a template class.) For example:
346 template <class T> void S<T>::f(int);
348 The `class T' matches the `S<T>', leaving no template headers
349 corresponding to the `f'. */
351 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
352 /* We've got too many template headers. For example:
354 template <> template <class T> void f (T);
356 There need to be more enclosing classes. */
357 return tsk_excessive_parms
;
359 /* This must be a template. It's of the form:
361 template <class T> template <class U> void S<T>::f(U);
363 This is a specialization if the innermost level was a
364 specialization; otherwise it's just a definition of the
366 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
369 /* Exit the current scope. */
377 /* When a label goes out of scope, check to see if that label was used
378 in a valid manner, and issue any appropriate warnings or errors. */
381 pop_label (tree label
, tree old_value
)
383 if (!processing_template_decl
)
385 if (DECL_INITIAL (label
) == NULL_TREE
)
389 error ("label %q+D used but not defined", label
);
390 location
= input_location
;
391 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
392 /* Avoid crashing later. */
393 define_label (location
, DECL_NAME (label
));
396 warn_for_unused_label (label
);
399 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
402 /* At the end of a function, all labels declared within the function
403 go out of scope. BLOCK is the top-level block for the
407 pop_labels_1 (named_label_entry
**slot
, tree block
)
409 struct named_label_entry
*ent
= *slot
;
411 pop_label (ent
->label_decl
, NULL_TREE
);
413 /* Put the labels into the "variables" of the top-level block,
414 so debugger can see them. */
415 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
416 BLOCK_VARS (block
) = ent
->label_decl
;
418 named_labels
->clear_slot (slot
);
424 pop_labels (tree block
)
428 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
433 /* At the end of a block with local labels, restore the outer definition. */
436 pop_local_label (tree label
, tree old_value
)
438 struct named_label_entry dummy
;
440 pop_label (label
, old_value
);
442 dummy
.label_decl
= label
;
443 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
444 named_labels
->clear_slot (slot
);
447 /* The following two routines are used to interface to Objective-C++.
448 The binding level is purposely treated as an opaque type. */
451 objc_get_current_scope (void)
453 return current_binding_level
;
456 /* The following routine is used by the NeXT-style SJLJ exceptions;
457 variables get marked 'volatile' so as to not be clobbered by
458 _setjmp()/_longjmp() calls. All variables in the current scope,
459 as well as parent scopes up to (but not including) ENCLOSING_BLK
460 shall be thusly marked. */
463 objc_mark_locals_volatile (void *enclosing_blk
)
465 cp_binding_level
*scope
;
467 for (scope
= current_binding_level
;
468 scope
&& scope
!= enclosing_blk
;
469 scope
= scope
->level_chain
)
473 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
474 objc_volatilize_decl (decl
);
476 /* Do not climb up past the current function. */
477 if (scope
->kind
== sk_function_parms
)
482 /* Update data for defined and undefined labels when leaving a scope. */
485 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
487 named_label_entry
*ent
= *slot
;
488 cp_binding_level
*obl
= bl
->level_chain
;
490 if (ent
->binding_level
== bl
)
494 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
495 TREE_LISTs representing OVERLOADs, so be careful. */
496 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
498 : TREE_CHAIN (decl
)))
499 if (decl_jump_unsafe (decl
))
500 vec_safe_push (ent
->bad_decls
, decl
);
502 ent
->binding_level
= obl
;
503 ent
->names_in_scope
= obl
->names
;
507 ent
->in_try_scope
= true;
510 ent
->in_catch_scope
= true;
513 ent
->in_omp_scope
= true;
521 struct named_label_use_entry
*use
;
523 for (use
= ent
->uses
; use
; use
= use
->next
)
524 if (use
->binding_level
== bl
)
526 use
->binding_level
= obl
;
527 use
->names_in_scope
= obl
->names
;
528 if (bl
->kind
== sk_omp
)
529 use
->in_omp_scope
= true;
536 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
537 when errors were reported, except for -Werror-unused-but-set-*. */
538 static int unused_but_set_errorcount
;
540 /* Exit a binding level.
541 Pop the level off, and restore the state of the identifier-decl mappings
542 that were in effect when this level was entered.
544 If KEEP == 1, this level had explicit declarations, so
545 and create a "block" (a BLOCK node) for the level
546 to record its declarations and subblocks for symbol table output.
548 If FUNCTIONBODY is nonzero, this level is the body of a function,
549 so create a block as if KEEP were set and also clear out all
552 If REVERSE is nonzero, reverse the order of decls before putting
553 them into the BLOCK. */
556 poplevel (int keep
, int reverse
, int functionbody
)
559 /* The chain of decls was accumulated in reverse order.
560 Put it into forward order, just for cleanliness. */
565 int leaving_for_scope
;
568 cp_label_binding
*label_bind
;
570 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
575 gcc_assert (current_binding_level
->kind
!= sk_class
);
577 if (current_binding_level
->kind
== sk_cleanup
)
579 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
581 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
583 /* We used to use KEEP == 2 to indicate that the new block should go
584 at the beginning of the list of blocks at this binding level,
585 rather than the end. This hack is no longer used. */
586 gcc_assert (keep
== 0 || keep
== 1);
588 if (current_binding_level
->keep
)
591 /* Any uses of undefined labels, and any defined labels, now operate
592 under constraints of next binding contour. */
593 if (cfun
&& !functionbody
&& named_labels
)
594 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
595 (current_binding_level
);
597 /* Get the decls in the order they were written.
598 Usually current_binding_level->names is in reverse order.
599 But parameter decls were previously put in forward order. */
602 current_binding_level
->names
603 = decls
= nreverse (current_binding_level
->names
);
605 decls
= current_binding_level
->names
;
607 /* If there were any declarations or structure tags in that level,
608 or if this level is a function body,
609 create a BLOCK to record them for the life of this function. */
611 if (keep
== 1 || functionbody
)
612 block
= make_node (BLOCK
);
613 if (block
!= NULL_TREE
)
615 BLOCK_VARS (block
) = decls
;
616 BLOCK_SUBBLOCKS (block
) = subblocks
;
619 /* In each subblock, record that this is its superior. */
621 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
622 BLOCK_SUPERCONTEXT (link
) = block
;
624 /* We still support the old for-scope rules, whereby the variables
625 in a for-init statement were in scope after the for-statement
626 ended. We only use the new rules if flag_new_for_scope is
629 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
631 /* Before we remove the declarations first check for unused variables. */
632 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
633 && current_binding_level
->kind
!= sk_template_parms
634 && !processing_template_decl
)
635 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
637 /* There are cases where D itself is a TREE_LIST. See in
638 push_local_binding where the list of decls returned by
639 getdecls is built. */
640 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
641 tree type
= TREE_TYPE (decl
);
643 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
644 && ! DECL_IN_SYSTEM_HEADER (decl
)
645 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
646 && type
!= error_mark_node
647 && (!CLASS_TYPE_P (type
)
648 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
649 || lookup_attribute ("warn_unused",
650 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
652 if (! TREE_USED (decl
))
653 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
654 else if (DECL_CONTEXT (decl
) == current_function_decl
655 // For -Wunused-but-set-variable leave references alone.
656 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
657 && errorcount
== unused_but_set_errorcount
)
659 warning (OPT_Wunused_but_set_variable
,
660 "variable %q+D set but not used", decl
);
661 unused_but_set_errorcount
= errorcount
;
666 /* Remove declarations for all the DECLs in this level. */
667 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
669 if (leaving_for_scope
&& VAR_P (link
)
670 /* It's hard to make this ARM compatibility hack play nicely with
671 lambdas, and it really isn't necessary in C++11 mode. */
672 && cxx_dialect
< cxx11
675 tree name
= DECL_NAME (link
);
679 ob
= outer_binding (name
,
680 IDENTIFIER_BINDING (name
),
683 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
685 ns_binding
= NULL_TREE
;
687 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
688 /* We have something like:
693 and we are leaving the `for' scope. There's no reason to
694 keep the binding of the inner `i' in this case. */
695 pop_binding (name
, link
);
696 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
697 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
698 /* Here, we have something like:
706 We must pop the for-scope binding so we know what's a
707 type and what isn't. */
708 pop_binding (name
, link
);
711 /* Mark this VAR_DECL as dead so that we can tell we left it
712 there only for backward compatibility. */
713 DECL_DEAD_FOR_LOCAL (link
) = 1;
715 /* Keep track of what should have happened when we
716 popped the binding. */
719 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
720 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
723 /* Add it to the list of dead variables in the next
724 outermost binding to that we can remove these when we
725 leave that binding. */
727 current_binding_level
->level_chain
->dead_vars_from_for
,
730 /* Although we don't pop the cxx_binding, we do clear
731 its SCOPE since the scope is going away now. */
732 IDENTIFIER_BINDING (name
)->scope
733 = current_binding_level
->level_chain
;
740 /* Remove the binding. */
743 if (TREE_CODE (decl
) == TREE_LIST
)
744 decl
= TREE_VALUE (decl
);
747 if (TREE_CODE (name
) == OVERLOAD
)
748 name
= OVL_FUNCTION (name
);
750 gcc_assert (DECL_P (name
));
751 pop_binding (DECL_NAME (name
), decl
);
755 /* Remove declarations for any `for' variables from inner scopes
756 that we kept around. */
757 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
759 pop_binding (DECL_NAME (decl
), decl
);
761 /* Restore the IDENTIFIER_TYPE_VALUEs. */
762 for (link
= current_binding_level
->type_shadowed
;
763 link
; link
= TREE_CHAIN (link
))
764 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
766 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
767 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
769 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
771 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
772 list if a `using' declaration put them there. The debugging
773 back ends won't understand OVERLOAD, so we remove them here.
774 Because the BLOCK_VARS are (temporarily) shared with
775 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
776 popped all the bindings. */
781 for (d
= &BLOCK_VARS (block
); *d
; )
783 if (TREE_CODE (*d
) == TREE_LIST
)
784 *d
= TREE_CHAIN (*d
);
786 d
= &DECL_CHAIN (*d
);
790 /* If the level being exited is the top level of a function,
791 check over all the labels. */
794 /* Since this is the top level block of a function, the vars are
795 the function's parameters. Don't leave them in the BLOCK
796 because they are found in the FUNCTION_DECL instead. */
797 BLOCK_VARS (block
) = 0;
801 kind
= current_binding_level
->kind
;
802 if (kind
== sk_cleanup
)
806 /* If this is a temporary binding created for a cleanup, then we'll
807 have pushed a statement list level. Pop that, create a new
808 BIND_EXPR for the block, and insert it into the stream. */
809 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
810 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
817 /* The current function is being defined, so its DECL_INITIAL
818 should be error_mark_node. */
819 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
820 DECL_INITIAL (current_function_decl
) = block
;
823 current_binding_level
->blocks
824 = block_chainon (current_binding_level
->blocks
, block
);
826 /* If we did not make a block for the level just exited,
827 any blocks made for inner levels
828 (since they cannot be recorded as subblocks in that level)
829 must be carried forward so they will later become subblocks
830 of something else. */
832 current_binding_level
->blocks
833 = block_chainon (current_binding_level
->blocks
, subblocks
);
835 /* Each and every BLOCK node created here in `poplevel' is important
836 (e.g. for proper debugging information) so if we created one
837 earlier, mark it as "used". */
839 TREE_USED (block
) = 1;
841 /* All temporary bindings created for cleanups are popped silently. */
842 if (kind
== sk_cleanup
)
845 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
849 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
850 itself, calling F for each. The DATA is passed to F as well. */
853 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
856 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
858 result
|= (*f
) (name_space
, data
);
860 for (; current
; current
= DECL_CHAIN (current
))
861 result
|= walk_namespaces_r (current
, f
, data
);
866 /* Walk all the namespaces, calling F for each. The DATA is passed to
870 walk_namespaces (walk_namespaces_fn f
, void* data
)
872 return walk_namespaces_r (global_namespace
, f
, data
);
875 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
876 DATA is non-NULL, this is the last time we will call
877 wrapup_global_declarations for this NAMESPACE. */
880 wrapup_globals_for_namespace (tree name_space
, void* data
)
882 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
883 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
884 tree
*vec
= statics
->address ();
885 int len
= statics
->length ();
886 int last_time
= (data
!= 0);
890 check_global_declarations (vec
, len
);
891 emit_debug_global_declarations (vec
, len
);
895 /* Write out any globals that need to be output. */
896 return wrapup_global_declarations (vec
, len
);
900 /* In C++, you don't have to write `struct S' to refer to `S'; you
901 can just use `S'. We accomplish this by creating a TYPE_DECL as
902 if the user had written `typedef struct S S'. Create and return
903 the TYPE_DECL for TYPE. */
906 create_implicit_typedef (tree name
, tree type
)
910 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
911 DECL_ARTIFICIAL (decl
) = 1;
912 /* There are other implicit type declarations, like the one *within*
913 a class that allows you to write `S::S'. We must distinguish
915 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
916 TYPE_NAME (type
) = decl
;
917 TYPE_STUB_DECL (type
) = decl
;
922 /* Remember a local name for name-mangling purposes. */
925 push_local_name (tree decl
)
930 timevar_start (TV_NAME_LOOKUP
);
932 name
= DECL_NAME (decl
);
934 nelts
= vec_safe_length (local_names
);
935 for (i
= 0; i
< nelts
; i
++)
937 t
= (*local_names
)[i
];
938 if (DECL_NAME (t
) == name
)
940 if (!DECL_LANG_SPECIFIC (decl
))
941 retrofit_lang_decl (decl
);
942 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
943 if (DECL_DISCRIMINATOR_SET_P (t
))
944 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
946 DECL_DISCRIMINATOR (decl
) = 1;
948 (*local_names
)[i
] = decl
;
949 timevar_stop (TV_NAME_LOOKUP
);
954 vec_safe_push (local_names
, decl
);
955 timevar_stop (TV_NAME_LOOKUP
);
958 /* Subroutine of duplicate_decls: return truthvalue of whether
959 or not types of these decls match.
961 For C++, we must compare the parameter list so that `int' can match
962 `int&' in a parameter position, but `int&' is not confused with
966 decls_match (tree newdecl
, tree olddecl
)
970 if (newdecl
== olddecl
)
973 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
974 /* If the two DECLs are not even the same kind of thing, we're not
975 interested in their types. */
978 gcc_assert (DECL_P (newdecl
));
980 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
982 tree f1
= TREE_TYPE (newdecl
);
983 tree f2
= TREE_TYPE (olddecl
);
984 tree p1
= TYPE_ARG_TYPES (f1
);
985 tree p2
= TYPE_ARG_TYPES (f2
);
988 /* Specializations of different templates are different functions
989 even if they have the same type. */
990 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
991 ? DECL_TI_TEMPLATE (newdecl
)
993 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
994 ? DECL_TI_TEMPLATE (olddecl
)
999 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1000 && ! (DECL_EXTERN_C_P (newdecl
)
1001 && DECL_EXTERN_C_P (olddecl
)))
1004 /* A new declaration doesn't match a built-in one unless it
1005 is also extern "C". */
1006 if (DECL_IS_BUILTIN (olddecl
)
1007 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1010 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1013 /* A declaration with deduced return type should use its pre-deduction
1014 type for declaration matching. */
1015 r2
= fndecl_declared_return_type (olddecl
);
1017 if (same_type_p (TREE_TYPE (f1
), r2
))
1019 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1020 && (DECL_BUILT_IN (olddecl
)
1021 #ifndef NO_IMPLICIT_EXTERN_C
1022 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1023 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1027 types_match
= self_promoting_args_p (p1
);
1028 if (p1
== void_list_node
)
1029 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1031 #ifndef NO_IMPLICIT_EXTERN_C
1032 else if (!prototype_p (f1
)
1033 && (DECL_EXTERN_C_P (olddecl
)
1034 && DECL_IN_SYSTEM_HEADER (olddecl
)
1035 && !DECL_CLASS_SCOPE_P (olddecl
))
1036 && (DECL_EXTERN_C_P (newdecl
)
1037 && DECL_IN_SYSTEM_HEADER (newdecl
)
1038 && !DECL_CLASS_SCOPE_P (newdecl
)))
1040 types_match
= self_promoting_args_p (p2
);
1041 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1047 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1048 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1049 || comp_type_attributes (TREE_TYPE (newdecl
),
1050 TREE_TYPE (olddecl
)) != 0);
1055 /* The decls dont match if they correspond to two different versions
1056 of the same function. Disallow extern "C" functions to be
1057 versions for now. */
1059 && !DECL_EXTERN_C_P (newdecl
)
1060 && !DECL_EXTERN_C_P (olddecl
)
1061 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1063 /* Mark functions as versions if necessary. Modify the mangled decl
1064 name if necessary. */
1065 if (DECL_FUNCTION_VERSIONED (newdecl
)
1066 && DECL_FUNCTION_VERSIONED (olddecl
))
1068 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1070 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1071 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1072 mangle_decl (newdecl
);
1074 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1076 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1077 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1078 mangle_decl (olddecl
);
1080 cgraph_node::record_function_versions (olddecl
, newdecl
);
1084 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1086 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1087 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1090 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1091 DECL_TEMPLATE_PARMS (olddecl
)))
1094 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1095 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1096 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1098 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1099 DECL_TEMPLATE_RESULT (newdecl
));
1103 /* Need to check scope for variable declaration (VAR_DECL).
1104 For typedef (TYPE_DECL), scope is ignored. */
1106 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1108 Two declarations for an object with C language linkage
1109 with the same name (ignoring the namespace that qualify
1110 it) that appear in different namespace scopes refer to
1112 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1115 if (TREE_TYPE (newdecl
) == error_mark_node
)
1116 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1117 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1118 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1119 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1122 types_match
= comptypes (TREE_TYPE (newdecl
),
1123 TREE_TYPE (olddecl
),
1124 COMPARE_REDECLARATION
);
1130 /* If NEWDECL is `static' and an `extern' was seen previously,
1131 warn about it. OLDDECL is the previous declaration.
1133 Note that this does not apply to the C++ case of declaring
1134 a variable `extern const' and then later `const'.
1136 Don't complain about built-in functions, since they are beyond
1137 the user's control. */
1140 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1142 if (TREE_CODE (newdecl
) == TYPE_DECL
1143 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1144 || TREE_CODE (newdecl
) == CONST_DECL
1145 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1148 /* Don't get confused by static member functions; that's a different
1150 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1151 && DECL_STATIC_FUNCTION_P (newdecl
))
1154 /* If the old declaration was `static', or the new one isn't, then
1155 everything is OK. */
1156 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1159 /* It's OK to declare a builtin function as `static'. */
1160 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1161 && DECL_ARTIFICIAL (olddecl
))
1164 if (permerror (input_location
,
1165 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1166 inform (input_location
, "previous declaration of %q+D", olddecl
);
1169 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1170 function templates. If their exception specifications do not
1171 match, issue a diagnostic. */
1174 check_redeclaration_exception_specification (tree new_decl
,
1177 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1178 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1180 /* Two default specs are equivalent, don't force evaluation. */
1181 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1182 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1185 maybe_instantiate_noexcept (new_decl
);
1186 maybe_instantiate_noexcept (old_decl
);
1187 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1188 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1192 If any declaration of a function has an exception-specification,
1193 all declarations, including the definition and an explicit
1194 specialization, of that function shall have an
1195 exception-specification with the same set of type-ids. */
1196 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1197 && ! DECL_IS_BUILTIN (old_decl
)
1199 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1201 error ("declaration of %qF has a different exception specifier",
1203 error ("from previous declaration %q+F", old_decl
);
1207 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1208 Otherwise issue diagnostics. */
1211 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1213 old_decl
= STRIP_TEMPLATE (old_decl
);
1214 new_decl
= STRIP_TEMPLATE (new_decl
);
1215 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1216 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1218 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1219 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1221 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1223 if (DECL_BUILT_IN (old_decl
))
1225 /* Hide a built-in declaration. */
1226 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1227 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1230 /* 7.1.5 [dcl.constexpr]
1231 Note: An explicit specialization can differ from the template
1232 declaration with respect to the constexpr specifier. */
1233 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1234 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1237 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1238 error ("from previous declaration %q+D", old_decl
);
1244 /* DECL is a redeclaration of a function or function template. If
1245 it does have default arguments issue a diagnostic. Note: this
1246 function is used to enforce the requirements in C++11 8.3.6 about
1247 no default arguments in redeclarations. */
1250 check_redeclaration_no_default_args (tree decl
)
1252 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1254 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1255 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1256 if (TREE_PURPOSE (t
))
1258 permerror (input_location
,
1259 "redeclaration of %q#D may not have default "
1265 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1266 && lookup_attribute ("gnu_inline", \
1267 DECL_ATTRIBUTES (fn)))
1269 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1270 If the redeclaration is invalid, a diagnostic is issued, and the
1271 error_mark_node is returned. Otherwise, OLDDECL is returned.
1273 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1276 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1279 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1281 unsigned olddecl_uid
= DECL_UID (olddecl
);
1282 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1283 int new_defines_function
= 0;
1284 tree new_template_info
;
1286 if (newdecl
== olddecl
)
1289 types_match
= decls_match (newdecl
, olddecl
);
1291 /* If either the type of the new decl or the type of the old decl is an
1292 error_mark_node, then that implies that we have already issued an
1293 error (earlier) for some bogus type specification, and in that case,
1294 it is rather pointless to harass the user with yet more error message
1295 about the same declaration, so just pretend the types match here. */
1296 if (TREE_TYPE (newdecl
) == error_mark_node
1297 || TREE_TYPE (olddecl
) == error_mark_node
)
1298 return error_mark_node
;
1300 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1301 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1303 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1304 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1305 && check_raw_literal_operator (olddecl
))
1306 error ("literal operator template %q+D conflicts with"
1307 " raw literal operator %qD", newdecl
, olddecl
);
1308 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1309 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1310 && check_raw_literal_operator (newdecl
))
1311 error ("raw literal operator %q+D conflicts with"
1312 " literal operator template %qD", newdecl
, olddecl
);
1315 if (DECL_P (olddecl
)
1316 && TREE_CODE (newdecl
) == FUNCTION_DECL
1317 && TREE_CODE (olddecl
) == FUNCTION_DECL
1318 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1320 if (DECL_DECLARED_INLINE_P (newdecl
)
1321 && DECL_UNINLINABLE (newdecl
)
1322 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1323 /* Already warned elsewhere. */;
1324 else if (DECL_DECLARED_INLINE_P (olddecl
)
1325 && DECL_UNINLINABLE (olddecl
)
1326 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1327 /* Already warned. */;
1328 else if (DECL_DECLARED_INLINE_P (newdecl
)
1329 && DECL_UNINLINABLE (olddecl
)
1330 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1332 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1334 inform (DECL_SOURCE_LOCATION (olddecl
),
1335 "previous declaration of %qD with attribute noinline",
1338 else if (DECL_DECLARED_INLINE_P (olddecl
)
1339 && DECL_UNINLINABLE (newdecl
)
1340 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1342 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1343 "attribute noinline", newdecl
))
1344 inform (DECL_SOURCE_LOCATION (olddecl
),
1345 "previous declaration of %qD was inline",
1350 /* Check for redeclaration and other discrepancies. */
1351 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1352 && DECL_ARTIFICIAL (olddecl
))
1354 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1355 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1357 /* Avoid warnings redeclaring built-ins which have not been
1358 explicitly declared. */
1359 if (DECL_ANTICIPATED (olddecl
))
1362 /* If you declare a built-in or predefined function name as static,
1363 the old definition is overridden, but optionally warn this was a
1364 bad choice of name. */
1365 if (! TREE_PUBLIC (newdecl
))
1367 warning (OPT_Wshadow
,
1368 DECL_BUILT_IN (olddecl
)
1369 ? G_("shadowing built-in function %q#D")
1370 : G_("shadowing library function %q#D"), olddecl
);
1371 /* Discard the old built-in function. */
1374 /* If the built-in is not ansi, then programs can override
1375 it even globally without an error. */
1376 else if (! DECL_BUILT_IN (olddecl
))
1377 warning (0, "library function %q#D redeclared as non-function %q#D",
1380 error ("declaration of %q#D conflicts with built-in "
1381 "declaration %q#D", newdecl
, olddecl
);
1384 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1386 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1387 error_at (DECL_SOURCE_LOCATION (newdecl
),
1388 "redeclaration of %<pragma omp declare reduction%>");
1389 inform (DECL_SOURCE_LOCATION (olddecl
),
1390 "previous %<pragma omp declare reduction%> declaration");
1391 return error_mark_node
;
1393 else if (!types_match
)
1395 /* Avoid warnings redeclaring built-ins which have not been
1396 explicitly declared. */
1397 if (DECL_ANTICIPATED (olddecl
))
1399 /* Deal with fileptr_type_node. FILE type is not known
1400 at the time we create the builtins. */
1403 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1404 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1406 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1409 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1411 tree t
= TREE_VALUE (t1
);
1414 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1415 == get_identifier ("FILE")
1416 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1418 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1420 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1421 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1422 types_match
= decls_match (newdecl
, olddecl
);
1424 return duplicate_decls (newdecl
, olddecl
,
1426 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1429 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1432 else if ((DECL_EXTERN_C_P (newdecl
)
1433 && DECL_EXTERN_C_P (olddecl
))
1434 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1435 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1437 /* A near match; override the builtin. */
1439 if (TREE_PUBLIC (newdecl
))
1440 warning (0, "new declaration %q#D ambiguates built-in "
1441 "declaration %q#D", newdecl
, olddecl
);
1443 warning (OPT_Wshadow
,
1444 DECL_BUILT_IN (olddecl
)
1445 ? G_("shadowing built-in function %q#D")
1446 : G_("shadowing library function %q#D"), olddecl
);
1449 /* Discard the old built-in function. */
1452 /* Replace the old RTL to avoid problems with inlining. */
1453 COPY_DECL_RTL (newdecl
, olddecl
);
1455 /* Even if the types match, prefer the new declarations type for
1456 built-ins which have not been explicitly declared, for
1457 exception lists, etc... */
1458 else if (DECL_IS_BUILTIN (olddecl
))
1460 tree type
= TREE_TYPE (newdecl
);
1461 tree attribs
= (*targetm
.merge_type_attributes
)
1462 (TREE_TYPE (olddecl
), type
);
1464 type
= cp_build_type_attribute_variant (type
, attribs
);
1465 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1468 /* If a function is explicitly declared "throw ()", propagate that to
1469 the corresponding builtin. */
1470 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1471 && DECL_ANTICIPATED (olddecl
)
1472 && TREE_NOTHROW (newdecl
)
1473 && !TREE_NOTHROW (olddecl
))
1475 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1476 tree tmpdecl
= builtin_decl_explicit (fncode
);
1477 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1478 TREE_NOTHROW (tmpdecl
) = 1;
1481 /* Whether or not the builtin can throw exceptions has no
1482 bearing on this declarator. */
1483 TREE_NOTHROW (olddecl
) = 0;
1485 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1487 /* If a builtin function is redeclared as `static', merge
1488 the declarations, but make the original one static. */
1489 DECL_THIS_STATIC (olddecl
) = 1;
1490 TREE_PUBLIC (olddecl
) = 0;
1492 /* Make the old declaration consistent with the new one so
1493 that all remnants of the builtin-ness of this function
1494 will be banished. */
1495 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1496 COPY_DECL_RTL (newdecl
, olddecl
);
1499 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1501 /* C++ Standard, 3.3, clause 4:
1502 "[Note: a namespace name or a class template name must be unique
1503 in its declarative region (7.3.2, clause 14). ]" */
1504 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1505 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1506 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1507 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1508 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1509 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1511 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1512 && TREE_CODE (newdecl
) != TYPE_DECL
)
1513 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1514 && TREE_CODE (olddecl
) != TYPE_DECL
))
1516 /* We do nothing special here, because C++ does such nasty
1517 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1518 get shadowed, and know that if we need to find a TYPE_DECL
1519 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1520 slot of the identifier. */
1524 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1525 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1526 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1527 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1531 error ("%q#D redeclared as different kind of symbol", newdecl
);
1532 if (TREE_CODE (olddecl
) == TREE_LIST
)
1533 olddecl
= TREE_VALUE (olddecl
);
1534 inform (DECL_SOURCE_LOCATION (olddecl
),
1535 "previous declaration %q#D", olddecl
);
1537 return error_mark_node
;
1539 else if (!types_match
)
1541 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1542 /* These are certainly not duplicate declarations; they're
1543 from different scopes. */
1546 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1548 /* The name of a class template may not be declared to refer to
1549 any other template, class, function, object, namespace, value,
1550 or type in the same scope. */
1551 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1552 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1554 error ("conflicting declaration of template %q#D", newdecl
);
1555 inform (DECL_SOURCE_LOCATION (olddecl
),
1556 "previous declaration %q#D", olddecl
);
1557 return error_mark_node
;
1559 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1560 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1561 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1562 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1563 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1564 DECL_TEMPLATE_PARMS (olddecl
))
1565 /* Template functions can be disambiguated by
1567 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1568 TREE_TYPE (TREE_TYPE (olddecl
))))
1570 error ("ambiguating new declaration %q#D", newdecl
);
1571 inform (DECL_SOURCE_LOCATION (olddecl
),
1572 "old declaration %q#D", olddecl
);
1576 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1578 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1580 error ("conflicting declaration of C function %q#D",
1582 inform (DECL_SOURCE_LOCATION (olddecl
),
1583 "previous declaration %q#D", olddecl
);
1586 /* For function versions, params and types match, but they
1587 are not ambiguous. */
1588 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1589 && !DECL_FUNCTION_VERSIONED (olddecl
))
1590 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1591 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1593 error ("ambiguating new declaration of %q#D", newdecl
);
1594 inform (DECL_SOURCE_LOCATION (olddecl
),
1595 "old declaration %q#D", olddecl
);
1596 return error_mark_node
;
1603 error ("conflicting declaration %q#D", newdecl
);
1604 inform (DECL_SOURCE_LOCATION (olddecl
),
1605 "previous declaration as %q#D", olddecl
);
1606 return error_mark_node
;
1609 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1610 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1611 && (!DECL_TEMPLATE_INFO (newdecl
)
1612 || (DECL_TI_TEMPLATE (newdecl
)
1613 != DECL_TI_TEMPLATE (olddecl
))))
1614 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1615 && (!DECL_TEMPLATE_INFO (olddecl
)
1616 || (DECL_TI_TEMPLATE (olddecl
)
1617 != DECL_TI_TEMPLATE (newdecl
))))))
1618 /* It's OK to have a template specialization and a non-template
1619 with the same type, or to have specializations of two
1620 different templates with the same type. Note that if one is a
1621 specialization, and the other is an instantiation of the same
1622 template, that we do not exit at this point. That situation
1623 can occur if we instantiate a template class, and then
1624 specialize one of its methods. This situation is valid, but
1625 the declarations must be merged in the usual way. */
1627 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1628 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1629 && !DECL_USE_TEMPLATE (newdecl
))
1630 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1631 && !DECL_USE_TEMPLATE (olddecl
))))
1632 /* One of the declarations is a template instantiation, and the
1633 other is not a template at all. That's OK. */
1635 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1637 /* In [namespace.alias] we have:
1639 In a declarative region, a namespace-alias-definition can be
1640 used to redefine a namespace-alias declared in that declarative
1641 region to refer only to the namespace to which it already
1644 Therefore, if we encounter a second alias directive for the same
1645 alias, we can just ignore the second directive. */
1646 if (DECL_NAMESPACE_ALIAS (newdecl
)
1647 && (DECL_NAMESPACE_ALIAS (newdecl
)
1648 == DECL_NAMESPACE_ALIAS (olddecl
)))
1650 /* [namespace.alias]
1652 A namespace-name or namespace-alias shall not be declared as
1653 the name of any other entity in the same declarative region.
1654 A namespace-name defined at global scope shall not be
1655 declared as the name of any other entity in any global scope
1657 error ("conflicting declaration of namespace %qD", newdecl
);
1658 inform (DECL_SOURCE_LOCATION (olddecl
),
1659 "previous declaration of namespace %qD here", olddecl
);
1660 return error_mark_node
;
1664 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1667 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1668 if (DECL_NAME (olddecl
) != NULL_TREE
)
1669 inform (input_location
,
1670 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1671 ? G_("%q+#D previously defined here")
1672 : G_("%q+#D previously declared here"), olddecl
);
1673 return error_mark_node
;
1675 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1676 && DECL_INITIAL (olddecl
) != NULL_TREE
1677 && !prototype_p (TREE_TYPE (olddecl
))
1678 && prototype_p (TREE_TYPE (newdecl
)))
1680 /* Prototype decl follows defn w/o prototype. */
1681 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1682 "prototype specified for %q#D", newdecl
))
1683 inform (DECL_SOURCE_LOCATION (olddecl
),
1684 "previous non-prototype definition here");
1686 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1687 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1690 If two declarations of the same function or object
1691 specify different linkage-specifications ..., the program
1692 is ill-formed.... Except for functions with C++ linkage,
1693 a function declaration without a linkage specification
1694 shall not precede the first linkage specification for
1695 that function. A function can be declared without a
1696 linkage specification after an explicit linkage
1697 specification has been seen; the linkage explicitly
1698 specified in the earlier declaration is not affected by
1699 such a function declaration.
1701 DR 563 raises the question why the restrictions on
1702 functions should not also apply to objects. Older
1703 versions of G++ silently ignore the linkage-specification
1711 which is clearly wrong. Therefore, we now treat objects
1713 if (current_lang_depth () == 0)
1715 /* There is no explicit linkage-specification, so we use
1716 the linkage from the previous declaration. */
1717 if (!DECL_LANG_SPECIFIC (newdecl
))
1718 retrofit_lang_decl (newdecl
);
1719 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1723 error ("conflicting declaration of %q#D with %qL linkage",
1724 newdecl
, DECL_LANGUAGE (newdecl
));
1725 inform (DECL_SOURCE_LOCATION (olddecl
),
1726 "previous declaration with %qL linkage",
1727 DECL_LANGUAGE (olddecl
));
1731 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1733 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1735 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1736 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1737 && (/* grokfndecl passes member function templates too
1738 as FUNCTION_DECLs. */
1739 DECL_TEMPLATE_INFO (olddecl
)
1741 Default arguments for a member function of a class
1742 template shall be specified on the initial declaration
1743 of the member function within the class template. */
1744 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1745 check_redeclaration_no_default_args (newdecl
);
1748 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1749 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1752 for (; t1
&& t1
!= void_list_node
;
1753 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1754 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1756 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1759 if (permerror (input_location
,
1760 "default argument given for parameter "
1761 "%d of %q#D", i
, newdecl
))
1762 inform (DECL_SOURCE_LOCATION (olddecl
),
1763 "previous specification in %q#D here",
1768 error ("default argument given for parameter %d "
1769 "of %q#D", i
, newdecl
);
1770 inform (DECL_SOURCE_LOCATION (olddecl
),
1771 "previous specification in %q#D here",
1779 /* Do not merge an implicit typedef with an explicit one. In:
1783 typedef class A A __attribute__ ((foo));
1785 the attribute should apply only to the typedef. */
1786 if (TREE_CODE (olddecl
) == TYPE_DECL
1787 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1788 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1791 /* If new decl is `static' and an `extern' was seen previously,
1793 warn_extern_redeclared_static (newdecl
, olddecl
);
1795 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1796 return error_mark_node
;
1798 /* We have committed to returning 1 at this point. */
1799 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1801 /* Now that functions must hold information normally held
1802 by field decls, there is extra work to do so that
1803 declaration information does not get destroyed during
1805 if (DECL_VINDEX (olddecl
))
1806 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1807 if (DECL_CONTEXT (olddecl
))
1808 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1809 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1810 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1811 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1812 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1813 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1814 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1815 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1816 SET_OVERLOADED_OPERATOR_CODE
1817 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1818 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1820 /* Optionally warn about more than one declaration for the same
1821 name, but don't warn about a function declaration followed by a
1823 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1824 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1825 /* Don't warn about extern decl followed by definition. */
1826 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1827 /* Don't warn about friends, let add_friend take care of it. */
1828 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1829 /* Don't warn about declaration followed by specialization. */
1830 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1831 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1833 if (warning (OPT_Wredundant_decls
,
1834 "redundant redeclaration of %qD in same scope",
1836 inform (DECL_SOURCE_LOCATION (olddecl
),
1837 "previous declaration of %qD", olddecl
);
1840 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1841 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1843 if (DECL_DELETED_FN (newdecl
))
1845 error ("deleted definition of %qD", newdecl
);
1846 inform (DECL_SOURCE_LOCATION (olddecl
),
1847 "previous declaration of %qD", olddecl
);
1849 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1853 /* Deal with C++: must preserve virtual function table size. */
1854 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1856 tree newtype
= TREE_TYPE (newdecl
);
1857 tree oldtype
= TREE_TYPE (olddecl
);
1859 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1860 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1861 CLASSTYPE_FRIEND_CLASSES (newtype
)
1862 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1864 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1867 /* Copy all the DECL_... slots specified in the new decl
1868 except for any that we copy here from the old type. */
1869 DECL_ATTRIBUTES (newdecl
)
1870 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1872 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1876 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1877 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1878 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1879 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1880 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1881 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1883 DECL_ATTRIBUTES (old_result
)
1884 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1886 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1888 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1889 declarations of a function template. */
1890 check_redeclaration_no_default_args (newdecl
);
1892 check_default_args (newdecl
);
1894 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1895 && DECL_INITIAL (new_result
))
1897 if (DECL_INITIAL (old_result
))
1898 DECL_UNINLINABLE (old_result
) = 1;
1900 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1901 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1902 DECL_NOT_REALLY_EXTERN (old_result
)
1903 = DECL_NOT_REALLY_EXTERN (new_result
);
1904 DECL_INTERFACE_KNOWN (old_result
)
1905 = DECL_INTERFACE_KNOWN (new_result
);
1906 DECL_DECLARED_INLINE_P (old_result
)
1907 = DECL_DECLARED_INLINE_P (new_result
);
1908 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1909 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1914 DECL_DECLARED_INLINE_P (old_result
)
1915 |= DECL_DECLARED_INLINE_P (new_result
);
1916 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1917 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1918 check_redeclaration_exception_specification (newdecl
, olddecl
);
1922 /* If the new declaration is a definition, update the file and
1923 line information on the declaration, and also make
1924 the old declaration the same definition. */
1925 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1927 DECL_SOURCE_LOCATION (olddecl
)
1928 = DECL_SOURCE_LOCATION (old_result
)
1929 = DECL_SOURCE_LOCATION (newdecl
);
1930 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1931 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1934 DECL_ARGUMENTS (old_result
)
1935 = DECL_ARGUMENTS (new_result
);
1936 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1937 parm
= DECL_CHAIN (parm
))
1938 DECL_CONTEXT (parm
) = old_result
;
1947 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1948 check_redeclaration_exception_specification (newdecl
, olddecl
);
1950 /* Automatically handles default parameters. */
1951 tree oldtype
= TREE_TYPE (olddecl
);
1954 /* For typedefs use the old type, as the new type's DECL_NAME points
1955 at newdecl, which will be ggc_freed. */
1956 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1959 /* Merge the data types specified in the two decls. */
1960 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1962 if (VAR_P (newdecl
))
1964 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1965 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1966 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1967 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1968 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1969 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1971 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1972 if (DECL_LANG_SPECIFIC (olddecl
)
1973 && CP_DECL_THREADPRIVATE_P (olddecl
))
1975 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1976 if (!DECL_LANG_SPECIFIC (newdecl
))
1977 retrofit_lang_decl (newdecl
);
1979 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1983 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1985 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1986 check_default_args (newdecl
);
1988 /* Lay the type out, unless already done. */
1989 if (! same_type_p (newtype
, oldtype
)
1990 && TREE_TYPE (newdecl
) != error_mark_node
1991 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1992 layout_type (TREE_TYPE (newdecl
));
1994 if ((VAR_P (newdecl
)
1995 || TREE_CODE (newdecl
) == PARM_DECL
1996 || TREE_CODE (newdecl
) == RESULT_DECL
1997 || TREE_CODE (newdecl
) == FIELD_DECL
1998 || TREE_CODE (newdecl
) == TYPE_DECL
)
1999 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2000 layout_decl (newdecl
, 0);
2002 /* Merge the type qualifiers. */
2003 if (TREE_READONLY (newdecl
))
2004 TREE_READONLY (olddecl
) = 1;
2005 if (TREE_THIS_VOLATILE (newdecl
))
2006 TREE_THIS_VOLATILE (olddecl
) = 1;
2007 if (TREE_NOTHROW (newdecl
))
2008 TREE_NOTHROW (olddecl
) = 1;
2010 /* Merge deprecatedness. */
2011 if (TREE_DEPRECATED (newdecl
))
2012 TREE_DEPRECATED (olddecl
) = 1;
2014 /* Preserve function specific target and optimization options */
2015 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2017 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2018 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2019 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2020 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2022 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2023 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2024 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2025 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2028 /* Merge the initialization information. */
2029 if (DECL_INITIAL (newdecl
) == NULL_TREE
2030 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2032 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2033 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2034 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2036 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2037 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2041 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2043 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2044 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2045 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2046 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2047 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2048 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2049 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2050 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2051 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2052 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2053 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2054 /* Keep the old RTL. */
2055 COPY_DECL_RTL (olddecl
, newdecl
);
2057 else if (VAR_P (newdecl
)
2058 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2060 /* Keep the old RTL. We cannot keep the old RTL if the old
2061 declaration was for an incomplete object and the new
2062 declaration is not since many attributes of the RTL will
2064 COPY_DECL_RTL (olddecl
, newdecl
);
2067 /* If cannot merge, then use the new type and qualifiers,
2068 and don't preserve the old rtl. */
2071 /* Clean out any memory we had of the old declaration. */
2072 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2074 TREE_VALUE (oldstatic
) = error_mark_node
;
2076 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2077 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2078 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2079 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2082 /* Merge the storage class information. */
2083 merge_weak (newdecl
, olddecl
);
2085 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2086 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2087 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2088 if (! DECL_EXTERNAL (olddecl
))
2089 DECL_EXTERNAL (newdecl
) = 0;
2091 new_template_info
= NULL_TREE
;
2092 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2094 bool new_redefines_gnu_inline
= false;
2096 if (new_defines_function
2097 && ((DECL_INTERFACE_KNOWN (olddecl
)
2098 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2099 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2100 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2101 == FUNCTION_DECL
))))
2105 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2106 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2108 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2111 if (!new_redefines_gnu_inline
)
2113 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2114 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2115 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2117 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2118 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2119 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2121 /* If the OLDDECL is an instantiation and/or specialization,
2122 then the NEWDECL must be too. But, it may not yet be marked
2123 as such if the caller has created NEWDECL, but has not yet
2124 figured out that it is a redeclaration. */
2125 if (!DECL_USE_TEMPLATE (newdecl
))
2126 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2128 /* Don't really know how much of the language-specific
2129 values we should copy from old to new. */
2130 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2131 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2132 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2133 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2135 if (LANG_DECL_HAS_MIN (newdecl
))
2137 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2138 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2139 if (DECL_TEMPLATE_INFO (newdecl
))
2140 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2141 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2143 /* Only functions have these fields. */
2144 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2146 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2147 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2148 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2149 && DECL_HIDDEN_FRIEND_P (olddecl
)
2150 && newdecl_is_friend
);
2151 DECL_BEFRIENDING_CLASSES (newdecl
)
2152 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2153 DECL_BEFRIENDING_CLASSES (olddecl
));
2154 /* DECL_THUNKS is only valid for virtual functions,
2155 otherwise it is a DECL_FRIEND_CONTEXT. */
2156 if (DECL_VIRTUAL_P (newdecl
))
2157 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2159 /* Only variables have this field. */
2160 else if (VAR_P (newdecl
)
2161 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2162 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2165 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2169 /* Merge parameter attributes. */
2170 tree oldarg
, newarg
;
2171 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2172 newarg
= DECL_ARGUMENTS(newdecl
);
2174 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2175 DECL_ATTRIBUTES (newarg
)
2176 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2177 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2180 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2181 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2183 /* If newdecl is not a specialization, then it is not a
2184 template-related function at all. And that means that we
2185 should have exited above, returning 0. */
2186 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2188 if (DECL_ODR_USED (olddecl
))
2189 /* From [temp.expl.spec]:
2191 If a template, a member template or the member of a class
2192 template is explicitly specialized then that
2193 specialization shall be declared before the first use of
2194 that specialization that would cause an implicit
2195 instantiation to take place, in every translation unit in
2196 which such a use occurs. */
2197 error ("explicit specialization of %qD after first use",
2200 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2201 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2202 && DECL_DECLARED_INLINE_P (newdecl
));
2204 /* Don't propagate visibility from the template to the
2205 specialization here. We'll do that in determine_visibility if
2207 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2209 /* [temp.expl.spec/14] We don't inline explicit specialization
2210 just because the primary template says so. */
2212 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2213 the always_inline attribute. */
2214 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2215 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2217 if (DECL_DECLARED_INLINE_P (newdecl
))
2218 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2220 DECL_ATTRIBUTES (newdecl
)
2221 = remove_attribute ("always_inline",
2222 DECL_ATTRIBUTES (newdecl
));
2225 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2227 /* Never inline re-defined extern inline functions.
2228 FIXME: this could be better handled by keeping both
2229 function as separate declarations. */
2230 DECL_UNINLINABLE (newdecl
) = 1;
2234 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2235 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2237 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2239 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2240 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2242 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2243 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2244 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2245 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2248 /* Preserve abstractness on cloned [cd]tors. */
2249 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2251 /* Update newdecl's parms to point at olddecl. */
2252 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2253 parm
= DECL_CHAIN (parm
))
2254 DECL_CONTEXT (parm
) = olddecl
;
2258 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2259 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2260 COPY_DECL_RTL (newdecl
, olddecl
);
2262 if (! types_match
|| new_defines_function
)
2264 /* These need to be copied so that the names are available.
2265 Note that if the types do match, we'll preserve inline
2266 info and other bits, but if not, we won't. */
2267 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2268 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2270 /* If redeclaring a builtin function, it stays built in
2271 if newdecl is a gnu_inline definition, or if newdecl is just
2273 if (DECL_BUILT_IN (olddecl
)
2274 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2276 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2277 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2278 /* If we're keeping the built-in definition, keep the rtl,
2279 regardless of declaration matches. */
2280 COPY_DECL_RTL (olddecl
, newdecl
);
2281 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2283 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2286 /* If a compatible prototype of these builtin functions
2287 is seen, assume the runtime implements it with the
2288 expected semantics. */
2289 case BUILT_IN_STPCPY
:
2290 if (builtin_decl_explicit_p (fncode
))
2291 set_builtin_decl_implicit_p (fncode
, true);
2298 if (new_defines_function
)
2299 /* If defining a function declared with other language
2300 linkage, use the previously declared language linkage. */
2301 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2302 else if (types_match
)
2304 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2305 /* Don't clear out the arguments if we're just redeclaring a
2307 if (DECL_ARGUMENTS (olddecl
))
2308 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2311 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2312 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2314 /* Now preserve various other info from the definition. */
2315 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2316 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2317 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2318 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2320 /* Warn about conflicting visibility specifications. */
2321 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2322 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2323 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2325 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2326 "%qD: visibility attribute ignored because it "
2327 "conflicts with previous declaration", newdecl
))
2328 inform (DECL_SOURCE_LOCATION (olddecl
),
2329 "previous declaration of %qD", olddecl
);
2331 /* Choose the declaration which specified visibility. */
2332 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2334 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2335 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2337 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2338 so keep this behavior. */
2339 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2341 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2342 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2344 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2345 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2347 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2348 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2350 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2351 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2352 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2354 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2355 with that from NEWDECL below. */
2356 if (DECL_LANG_SPECIFIC (olddecl
))
2358 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2359 != DECL_LANG_SPECIFIC (newdecl
));
2360 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2363 /* Merge the USED information. */
2364 if (TREE_USED (olddecl
))
2365 TREE_USED (newdecl
) = 1;
2366 else if (TREE_USED (newdecl
))
2367 TREE_USED (olddecl
) = 1;
2368 if (VAR_P (newdecl
))
2370 if (DECL_READ_P (olddecl
))
2371 DECL_READ_P (newdecl
) = 1;
2372 else if (DECL_READ_P (newdecl
))
2373 DECL_READ_P (olddecl
) = 1;
2375 if (DECL_PRESERVE_P (olddecl
))
2376 DECL_PRESERVE_P (newdecl
) = 1;
2377 else if (DECL_PRESERVE_P (newdecl
))
2378 DECL_PRESERVE_P (olddecl
) = 1;
2380 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2381 to olddecl and deleted. */
2382 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2383 && DECL_FUNCTION_VERSIONED (olddecl
))
2385 /* Set the flag for newdecl so that it gets copied to olddecl. */
2386 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2387 /* newdecl will be purged after copying to olddecl and is no longer
2389 cgraph_node::delete_function_version (newdecl
);
2392 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2395 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2397 function_size
= sizeof (struct tree_decl_common
);
2399 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2400 (char *) newdecl
+ sizeof (struct tree_common
),
2401 function_size
- sizeof (struct tree_common
));
2403 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2404 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2405 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2407 /* Preserve symtab node mapping. */
2408 olddecl
->decl_with_vis
.symtab_node
= snode
;
2410 if (new_template_info
)
2411 /* If newdecl is a template instantiation, it is possible that
2412 the following sequence of events has occurred:
2414 o A friend function was declared in a class template. The
2415 class template was instantiated.
2417 o The instantiation of the friend declaration was
2418 recorded on the instantiation list, and is newdecl.
2420 o Later, however, instantiate_class_template called pushdecl
2421 on the newdecl to perform name injection. But, pushdecl in
2422 turn called duplicate_decls when it discovered that another
2423 declaration of a global function with the same name already
2426 o Here, in duplicate_decls, we decided to clobber newdecl.
2428 If we're going to do that, we'd better make sure that
2429 olddecl, and not newdecl, is on the list of
2430 instantiations so that if we try to do the instantiation
2431 again we won't get the clobbered declaration. */
2432 reregister_specialization (newdecl
,
2438 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2440 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2441 (char *) newdecl
+ sizeof (struct tree_common
),
2442 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2443 switch (TREE_CODE (newdecl
))
2453 struct symtab_node
*snode
= NULL
;
2455 if (TREE_CODE (newdecl
) == VAR_DECL
2456 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2457 snode
= symtab_node::get (olddecl
);
2458 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2459 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2460 size
- sizeof (struct tree_decl_common
)
2461 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2462 if (TREE_CODE (newdecl
) == VAR_DECL
)
2463 olddecl
->decl_with_vis
.symtab_node
= snode
;
2467 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2468 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2469 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2470 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2475 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2476 || TREE_CODE (newdecl
) == VAR_DECL
)
2478 if (DECL_EXTERNAL (olddecl
)
2479 || TREE_PUBLIC (olddecl
)
2480 || TREE_STATIC (olddecl
))
2482 /* Merge the section attribute.
2483 We want to issue an error if the sections conflict but that must be
2484 done later in decl_attributes since we are called before attributes
2486 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2487 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2489 if (DECL_ONE_ONLY (newdecl
))
2491 struct symtab_node
*oldsym
, *newsym
;
2492 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2493 oldsym
= cgraph_node::get_create (olddecl
);
2495 oldsym
= varpool_node::get_create (olddecl
);
2496 newsym
= symtab_node::get (newdecl
);
2497 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2501 if (TREE_CODE (newdecl
) == VAR_DECL
2502 && DECL_THREAD_LOCAL_P (newdecl
))
2503 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2506 DECL_UID (olddecl
) = olddecl_uid
;
2508 DECL_FRIEND_P (olddecl
) = 1;
2511 DECL_ANTICIPATED (olddecl
) = 1;
2512 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2515 /* NEWDECL contains the merged attribute lists.
2516 Update OLDDECL to be the same. */
2517 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2519 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2520 so that encode_section_info has a chance to look at the new decl
2521 flags and attributes. */
2522 if (DECL_RTL_SET_P (olddecl
)
2523 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2525 && TREE_STATIC (olddecl
))))
2526 make_decl_rtl (olddecl
);
2528 /* The NEWDECL will no longer be needed. Because every out-of-class
2529 declaration of a member results in a call to duplicate_decls,
2530 freeing these nodes represents in a significant savings.
2532 Before releasing the node, be sore to remove function from symbol
2533 table that might have been inserted there to record comdat group.
2534 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2535 structure is shared in between newdecl and oldecl. */
2536 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2537 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2538 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2539 || TREE_CODE (newdecl
) == VAR_DECL
)
2541 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2550 /* Return zero if the declaration NEWDECL is valid
2551 when the declaration OLDDECL (assumed to be for the same name)
2552 has already been seen.
2553 Otherwise return an error message format string with a %s
2554 where the identifier should go. */
2557 redeclaration_error_message (tree newdecl
, tree olddecl
)
2559 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2561 /* Because C++ can put things into name space for free,
2562 constructs like "typedef struct foo { ... } foo"
2563 would look like an erroneous redeclaration. */
2564 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2567 return G_("redefinition of %q#D");
2569 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2571 /* If this is a pure function, its olddecl will actually be
2572 the original initialization to `0' (which we force to call
2573 abort()). Don't complain about redefinition in this case. */
2574 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2575 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2578 /* If both functions come from different namespaces, this is not
2579 a redeclaration - this is a conflict with a used function. */
2580 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2581 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2582 && ! decls_match (olddecl
, newdecl
))
2583 return G_("%qD conflicts with used function");
2585 /* We'll complain about linkage mismatches in
2586 warn_extern_redeclared_static. */
2588 /* Defining the same name twice is no good. */
2589 if (DECL_INITIAL (olddecl
) != NULL_TREE
2590 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2592 if (DECL_NAME (olddecl
) == NULL_TREE
)
2593 return G_("%q#D not declared in class");
2594 else if (!GNU_INLINE_P (olddecl
)
2595 || GNU_INLINE_P (newdecl
))
2596 return G_("redefinition of %q#D");
2599 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2601 bool olda
= GNU_INLINE_P (olddecl
);
2602 bool newa
= GNU_INLINE_P (newdecl
);
2607 return G_("%q+D redeclared inline with "
2608 "%<gnu_inline%> attribute");
2610 return G_("%q+D redeclared inline without "
2611 "%<gnu_inline%> attribute");
2615 check_abi_tag_redeclaration
2616 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2617 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2621 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2625 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2627 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2628 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2629 return G_("redefinition of %q#D");
2633 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2634 || (DECL_TEMPLATE_RESULT (newdecl
)
2635 == DECL_TEMPLATE_RESULT (olddecl
)))
2638 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2639 if (DECL_TEMPLATE_INFO (nt
))
2640 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2641 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2642 if (DECL_TEMPLATE_INFO (ot
))
2643 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2644 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2645 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2646 return G_("redefinition of %q#D");
2648 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2650 bool olda
= GNU_INLINE_P (ot
);
2651 bool newa
= GNU_INLINE_P (nt
);
2656 return G_("%q+D redeclared inline with "
2657 "%<gnu_inline%> attribute");
2659 return G_("%q+D redeclared inline without "
2660 "%<gnu_inline%> attribute");
2664 /* Core issue #226 (C++0x):
2666 If a friend function template declaration specifies a
2667 default template-argument, that declaration shall be a
2668 definition and shall be the only declaration of the
2669 function template in the translation unit. */
2670 if ((cxx_dialect
!= cxx98
)
2671 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2672 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2673 /*is_primary=*/true,
2674 /*is_partial=*/false,
2675 /*is_friend_decl=*/2))
2676 return G_("redeclaration of friend %q#D "
2677 "may not have default template arguments");
2681 else if (VAR_P (newdecl
)
2682 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2683 && (! DECL_LANG_SPECIFIC (olddecl
)
2684 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2685 || DECL_THREAD_LOCAL_P (newdecl
)))
2687 /* Only variables can be thread-local, and all declarations must
2688 agree on this property. */
2689 if (DECL_THREAD_LOCAL_P (newdecl
))
2690 return G_("thread-local declaration of %q#D follows "
2691 "non-thread-local declaration");
2693 return G_("non-thread-local declaration of %q#D follows "
2694 "thread-local declaration");
2696 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2698 /* The objects have been declared at namespace scope. If either
2699 is a member of an anonymous union, then this is an invalid
2700 redeclaration. For example:
2706 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2707 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2708 return G_("redeclaration of %q#D");
2709 /* If at least one declaration is a reference, there is no
2710 conflict. For example:
2716 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2718 /* Reject two definitions. */
2719 return G_("redefinition of %q#D");
2723 /* Objects declared with block scope: */
2724 /* Reject two definitions, and reject a definition
2725 together with an external reference. */
2726 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2727 return G_("redeclaration of %q#D");
2732 /* Hash and equality functions for the named_label table. */
2735 named_label_hasher::hash (named_label_entry
*ent
)
2737 return DECL_UID (ent
->label_decl
);
2741 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2743 return a
->label_decl
== b
->label_decl
;
2746 /* Create a new label, named ID. */
2749 make_label_decl (tree id
, int local_p
)
2751 struct named_label_entry
*ent
;
2754 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2756 DECL_CONTEXT (decl
) = current_function_decl
;
2757 DECL_MODE (decl
) = VOIDmode
;
2758 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2760 /* Say where one reference is to the label, for the sake of the
2761 error if it is not defined. */
2762 DECL_SOURCE_LOCATION (decl
) = input_location
;
2764 /* Record the fact that this identifier is bound to this label. */
2765 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2767 /* Create the label htab for the function on demand. */
2769 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2771 /* Record this label on the list of labels used in this function.
2772 We do this before calling make_label_decl so that we get the
2773 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2774 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2775 ent
->label_decl
= decl
;
2777 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2778 gcc_assert (*slot
== NULL
);
2784 /* Look for a label named ID in the current function. If one cannot
2785 be found, create one. (We keep track of used, but undefined,
2786 labels, and complain about them at the end of a function.) */
2789 lookup_label_1 (tree id
)
2793 /* You can't use labels at global scope. */
2794 if (current_function_decl
== NULL_TREE
)
2796 error ("label %qE referenced outside of any function", id
);
2800 /* See if we've already got this label. */
2801 decl
= IDENTIFIER_LABEL_VALUE (id
);
2802 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2805 decl
= make_label_decl (id
, /*local_p=*/0);
2809 /* Wrapper for lookup_label_1. */
2812 lookup_label (tree id
)
2815 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2816 ret
= lookup_label_1 (id
);
2817 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2821 /* Declare a local label named ID. */
2824 declare_local_label (tree id
)
2827 cp_label_binding bind
;
2829 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2830 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2831 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2833 decl
= make_label_decl (id
, /*local_p=*/1);
2835 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2840 /* Returns nonzero if it is ill-formed to jump past the declaration of
2841 DECL. Returns 2 if it's also a real problem. */
2844 decl_jump_unsafe (tree decl
)
2846 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2847 with automatic storage duration is not in scope to a point where it is
2848 in scope is ill-formed unless the variable has scalar type, class type
2849 with a trivial default constructor and a trivial destructor, a
2850 cv-qualified version of one of these types, or an array of one of the
2851 preceding types and is declared without an initializer (8.5). */
2852 tree type
= TREE_TYPE (decl
);
2854 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2855 || type
== error_mark_node
)
2858 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2859 || variably_modified_type_p (type
, NULL_TREE
))
2862 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2868 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2871 identify_goto (tree decl
, const location_t
*locus
)
2874 permerror (input_location
, "jump to label %qD", decl
);
2876 permerror (input_location
, "jump to case label");
2878 permerror (*locus
, " from here");
2881 /* Check that a single previously seen jump to a newly defined label
2882 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2883 the jump context; NAMES are the names in scope in LEVEL at the jump
2884 context; LOCUS is the source position of the jump or 0. Returns
2885 true if all is well. */
2888 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2889 bool exited_omp
, const location_t
*locus
)
2891 cp_binding_level
*b
;
2892 bool identified
= false, saw_eh
= false, saw_omp
= false;
2896 identify_goto (decl
, locus
);
2897 error (" exits OpenMP structured block");
2898 identified
= saw_omp
= true;
2901 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2903 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2905 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2906 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2907 : TREE_CHAIN (new_decls
)))
2909 int problem
= decl_jump_unsafe (new_decls
);
2915 identify_goto (decl
, locus
);
2919 error (" crosses initialization of %q+#D", new_decls
);
2921 permerror (input_location
, " enters scope of %q+#D which has "
2922 "non-trivial destructor", new_decls
);
2927 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2931 identify_goto (decl
, locus
);
2934 if (b
->kind
== sk_try
)
2935 error (" enters try block");
2937 error (" enters catch block");
2940 if (b
->kind
== sk_omp
&& !saw_omp
)
2944 identify_goto (decl
, locus
);
2947 error (" enters OpenMP structured block");
2956 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2958 check_previous_goto_1 (decl
, use
->binding_level
,
2959 use
->names_in_scope
, use
->in_omp_scope
,
2960 &use
->o_goto_locus
);
2964 check_switch_goto (cp_binding_level
* level
)
2966 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2969 /* Check that a new jump to a label DECL is OK. Called by
2970 finish_goto_stmt. */
2973 check_goto (tree decl
)
2975 struct named_label_entry
*ent
, dummy
;
2976 bool saw_catch
= false, identified
= false;
2980 /* We can't know where a computed goto is jumping.
2981 So we assume that it's OK. */
2982 if (TREE_CODE (decl
) != LABEL_DECL
)
2985 /* We didn't record any information about this label when we created it,
2986 and there's not much point since it's trivial to analyze as a return. */
2987 if (decl
== cdtor_label
)
2990 dummy
.label_decl
= decl
;
2991 ent
= named_labels
->find (&dummy
);
2992 gcc_assert (ent
!= NULL
);
2994 /* If the label hasn't been defined yet, defer checking. */
2995 if (! DECL_INITIAL (decl
))
2997 struct named_label_use_entry
*new_use
;
2999 /* Don't bother creating another use if the last goto had the
3000 same data, and will therefore create the same set of errors. */
3002 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3005 new_use
= ggc_alloc
<named_label_use_entry
> ();
3006 new_use
->binding_level
= current_binding_level
;
3007 new_use
->names_in_scope
= current_binding_level
->names
;
3008 new_use
->o_goto_locus
= input_location
;
3009 new_use
->in_omp_scope
= false;
3011 new_use
->next
= ent
->uses
;
3012 ent
->uses
= new_use
;
3016 if (ent
->in_try_scope
|| ent
->in_catch_scope
3017 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3019 permerror (input_location
, "jump to label %q+D", decl
);
3020 permerror (input_location
, " from here");
3024 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3026 int u
= decl_jump_unsafe (bad
);
3028 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3030 /* Can't skip init of __exception_info. */
3031 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3035 error (" skips initialization of %q+#D", bad
);
3037 permerror (input_location
, " enters scope of %q+#D which has "
3038 "non-trivial destructor", bad
);
3041 if (ent
->in_try_scope
)
3042 error (" enters try block");
3043 else if (ent
->in_catch_scope
&& !saw_catch
)
3044 error (" enters catch block");
3046 if (ent
->in_omp_scope
)
3047 error (" enters OpenMP structured block");
3048 else if (flag_openmp
)
3050 cp_binding_level
*b
;
3051 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3053 if (b
== ent
->binding_level
)
3055 if (b
->kind
== sk_omp
)
3059 permerror (input_location
, "jump to label %q+D", decl
);
3060 permerror (input_location
, " from here");
3063 error (" exits OpenMP structured block");
3070 /* Check that a return is ok wrt OpenMP structured blocks.
3071 Called by finish_return_stmt. Returns true if all is well. */
3074 check_omp_return (void)
3076 cp_binding_level
*b
;
3077 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3078 if (b
->kind
== sk_omp
)
3080 error ("invalid exit from OpenMP structured block");
3083 else if (b
->kind
== sk_function_parms
)
3088 /* Define a label, specifying the location in the source file.
3089 Return the LABEL_DECL node for the label. */
3092 define_label_1 (location_t location
, tree name
)
3094 struct named_label_entry
*ent
, dummy
;
3095 cp_binding_level
*p
;
3098 decl
= lookup_label (name
);
3100 dummy
.label_decl
= decl
;
3101 ent
= named_labels
->find (&dummy
);
3102 gcc_assert (ent
!= NULL
);
3104 /* After labels, make any new cleanups in the function go into their
3105 own new (temporary) binding contour. */
3106 for (p
= current_binding_level
;
3107 p
->kind
!= sk_function_parms
;
3109 p
->more_cleanups_ok
= 0;
3111 if (name
== get_identifier ("wchar_t"))
3112 permerror (input_location
, "label named wchar_t");
3114 if (DECL_INITIAL (decl
) != NULL_TREE
)
3116 error ("duplicate label %qD", decl
);
3117 return error_mark_node
;
3121 struct named_label_use_entry
*use
;
3123 /* Mark label as having been defined. */
3124 DECL_INITIAL (decl
) = error_mark_node
;
3125 /* Say where in the source. */
3126 DECL_SOURCE_LOCATION (decl
) = location
;
3128 ent
->binding_level
= current_binding_level
;
3129 ent
->names_in_scope
= current_binding_level
->names
;
3131 for (use
= ent
->uses
; use
; use
= use
->next
)
3132 check_previous_goto (decl
, use
);
3139 /* Wrapper for define_label_1. */
3142 define_label (location_t location
, tree name
)
3145 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3146 ret
= define_label_1 (location
, name
);
3147 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3154 cp_binding_level
*level
;
3155 struct cp_switch
*next
;
3156 /* The SWITCH_STMT being built. */
3158 /* A splay-tree mapping the low element of a case range to the high
3159 element, or NULL_TREE if there is no high element. Used to
3160 determine whether or not a new case label duplicates an old case
3161 label. We need a tree, rather than simply a hash table, because
3162 of the GNU case range extension. */
3166 /* A stack of the currently active switch statements. The innermost
3167 switch statement is on the top of the stack. There is no need to
3168 mark the stack for garbage collection because it is only active
3169 during the processing of the body of a function, and we never
3170 collect at that point. */
3172 static struct cp_switch
*switch_stack
;
3174 /* Called right after a switch-statement condition is parsed.
3175 SWITCH_STMT is the switch statement being parsed. */
3178 push_switch (tree switch_stmt
)
3180 struct cp_switch
*p
= XNEW (struct cp_switch
);
3181 p
->level
= current_binding_level
;
3182 p
->next
= switch_stack
;
3183 p
->switch_stmt
= switch_stmt
;
3184 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3191 struct cp_switch
*cs
= switch_stack
;
3192 location_t switch_location
;
3194 /* Emit warnings as needed. */
3195 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3196 if (!processing_template_decl
)
3197 c_do_switch_warnings (cs
->cases
, switch_location
,
3198 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3199 SWITCH_STMT_COND (cs
->switch_stmt
));
3201 splay_tree_delete (cs
->cases
);
3202 switch_stack
= switch_stack
->next
;
3206 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3207 condition. Note that if TYPE and VALUE are already integral we don't
3208 really do the conversion because the language-independent
3209 warning/optimization code will work better that way. */
3212 case_conversion (tree type
, tree value
)
3214 if (value
== NULL_TREE
)
3217 if (cxx_dialect
>= cxx11
3218 && (SCOPED_ENUM_P (type
)
3219 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3221 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3222 type
= type_promotes_to (type
);
3223 value
= (perform_implicit_conversion_flags
3224 (type
, value
, tf_warning_or_error
,
3225 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3227 return cxx_constant_value (value
);
3230 /* Note that we've seen a definition of a case label, and complain if this
3231 is a bad place for one. */
3234 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3237 cp_binding_level
*p
;
3240 if (processing_template_decl
)
3244 /* For templates, just add the case label; we'll do semantic
3245 analysis at instantiation-time. */
3246 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3247 return add_stmt (build_case_label (low_value
, high_value
, label
));
3250 /* Find the condition on which this switch statement depends. */
3251 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3252 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3253 cond
= TREE_VALUE (cond
);
3255 if (!check_switch_goto (switch_stack
->level
))
3256 return error_mark_node
;
3258 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3260 low_value
= case_conversion (type
, low_value
);
3261 high_value
= case_conversion (type
, high_value
);
3263 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3264 low_value
, high_value
);
3266 /* After labels, make any new cleanups in the function go into their
3267 own new (temporary) binding contour. */
3268 for (p
= current_binding_level
;
3269 p
->kind
!= sk_function_parms
;
3271 p
->more_cleanups_ok
= 0;
3276 struct typename_info
{
3284 struct typename_hasher
: ggc_hasher
<tree
>
3286 typedef typename_info
*compare_type
;
3288 /* Hash a TYPENAME_TYPE. */
3295 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3296 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3301 /* Compare two TYPENAME_TYPEs. */
3304 equal (tree t1
, const typename_info
*t2
)
3306 return (TYPE_IDENTIFIER (t1
) == t2
->name
3307 && TYPE_CONTEXT (t1
) == t2
->scope
3308 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3309 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3310 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3314 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3315 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3317 Returns the new TYPENAME_TYPE. */
3319 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3322 build_typename_type (tree context
, tree name
, tree fullname
,
3323 enum tag_types tag_type
)
3331 if (typename_htab
== NULL
)
3332 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3334 ti
.scope
= FROB_CONTEXT (context
);
3336 ti
.template_id
= fullname
;
3337 ti
.enum_p
= tag_type
== enum_type
;
3338 ti
.class_p
= (tag_type
== class_type
3339 || tag_type
== record_type
3340 || tag_type
== union_type
);
3341 hash
= (htab_hash_pointer (ti
.scope
)
3342 ^ htab_hash_pointer (ti
.name
));
3344 /* See if we already have this type. */
3345 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3350 /* Build the TYPENAME_TYPE. */
3351 t
= cxx_make_type (TYPENAME_TYPE
);
3352 TYPE_CONTEXT (t
) = ti
.scope
;
3353 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3354 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3355 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3357 /* Build the corresponding TYPE_DECL. */
3358 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3359 TYPE_NAME (TREE_TYPE (d
)) = d
;
3360 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3361 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3362 DECL_ARTIFICIAL (d
) = 1;
3364 /* Store it in the hash table. */
3367 /* TYPENAME_TYPEs must always be compared structurally, because
3368 they may or may not resolve down to another type depending on
3369 the currently open classes. */
3370 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3376 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3377 provided to name the type. Returns an appropriate type, unless an
3378 error occurs, in which case error_mark_node is returned. If we
3379 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3380 return that, rather than the _TYPE it corresponds to, in other
3381 cases we look through the type decl. If TF_ERROR is set, complain
3382 about errors, otherwise be quiet. */
3385 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3386 tsubst_flags_t complain
)
3392 if (name
== error_mark_node
3393 || context
== NULL_TREE
3394 || context
== error_mark_node
)
3395 return error_mark_node
;
3399 if (!(TYPE_LANG_SPECIFIC (name
)
3400 && (CLASSTYPE_IS_TEMPLATE (name
)
3401 || CLASSTYPE_USE_TEMPLATE (name
))))
3402 name
= TYPE_IDENTIFIER (name
);
3404 /* Create a TEMPLATE_ID_EXPR for the type. */
3405 name
= build_nt (TEMPLATE_ID_EXPR
,
3406 CLASSTYPE_TI_TEMPLATE (name
),
3407 CLASSTYPE_TI_ARGS (name
));
3409 else if (TREE_CODE (name
) == TYPE_DECL
)
3410 name
= DECL_NAME (name
);
3414 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3416 name
= TREE_OPERAND (name
, 0);
3417 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3418 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3419 else if (TREE_CODE (name
) == OVERLOAD
)
3421 if (complain
& tf_error
)
3422 error ("%qD is not a type", name
);
3423 return error_mark_node
;
3426 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3428 if (complain
& tf_error
)
3429 error ("%qD used without template parameters", name
);
3430 return error_mark_node
;
3432 gcc_assert (identifier_p (name
));
3433 gcc_assert (TYPE_P (context
));
3435 if (!MAYBE_CLASS_TYPE_P (context
))
3437 if (complain
& tf_error
)
3438 error ("%q#T is not a class", context
);
3439 return error_mark_node
;
3442 /* When the CONTEXT is a dependent type, NAME could refer to a
3443 dependent base class of CONTEXT. But look inside it anyway
3444 if CONTEXT is a currently open scope, in case it refers to a
3445 member of the current instantiation or a non-dependent base;
3446 lookup will stop when we hit a dependent base. */
3447 if (!dependent_scope_p (context
))
3448 /* We should only set WANT_TYPE when we're a nested typename type.
3449 Then we can give better diagnostics if we find a non-type. */
3450 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3454 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3455 return build_typename_type (context
, name
, fullname
, tag_type
);
3457 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3461 if (complain
& tf_error
)
3462 error (want_template
? G_("no class template named %q#T in %q#T")
3463 : G_("no type named %q#T in %q#T"), name
, context
);
3464 return error_mark_node
;
3467 /* Pull out the template from an injected-class-name (or multiple). */
3469 t
= maybe_get_template_decl_from_type_decl (t
);
3471 if (TREE_CODE (t
) == TREE_LIST
)
3473 if (complain
& tf_error
)
3475 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3476 print_candidates (t
);
3478 return error_mark_node
;
3481 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3483 if (complain
& tf_error
)
3484 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3486 return error_mark_node
;
3488 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3490 if (complain
& tf_error
)
3491 error ("%<typename %T::%D%> names %q#T, which is not a type",
3493 return error_mark_node
;
3496 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3497 return error_mark_node
;
3499 /* If we are currently parsing a template and if T is a typedef accessed
3500 through CONTEXT then we need to remember and check access of T at
3501 template instantiation time. */
3502 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3505 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3507 /*entering_scope=*/0,
3508 tf_warning_or_error
| tf_user
);
3510 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3513 maybe_record_typedef_use (t
);
3518 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3519 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3520 in which case error_mark_node is returned.
3522 If PARM_LIST is non-NULL, also make sure that the template parameter
3523 list of TEMPLATE_DECL matches.
3525 If COMPLAIN zero, don't complain about any errors that occur. */
3528 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3529 tsubst_flags_t complain
)
3535 name
= TYPE_IDENTIFIER (name
);
3536 else if (DECL_P (name
))
3537 name
= DECL_NAME (name
);
3538 gcc_assert (identifier_p (name
));
3540 if (!dependent_type_p (context
)
3541 || currently_open_class (context
))
3543 tree tmpl
= NULL_TREE
;
3545 if (MAYBE_CLASS_TYPE_P (context
))
3546 tmpl
= lookup_field (context
, name
, 0, false);
3548 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3549 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3551 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3553 if (complain
& tf_error
)
3554 error ("no class template named %q#T in %q#T", name
, context
);
3555 return error_mark_node
;
3559 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3561 if (complain
& tf_error
)
3563 error ("template parameters do not match template %qD", tmpl
);
3564 inform (DECL_SOURCE_LOCATION (tmpl
),
3565 "%qD declared here", tmpl
);
3567 return error_mark_node
;
3570 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3572 return error_mark_node
;
3577 /* Build the UNBOUND_CLASS_TEMPLATE. */
3578 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3579 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3580 TREE_TYPE (t
) = NULL_TREE
;
3581 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3583 /* Build the corresponding TEMPLATE_DECL. */
3584 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3585 TYPE_NAME (TREE_TYPE (d
)) = d
;
3586 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3587 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3588 DECL_ARTIFICIAL (d
) = 1;
3589 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3596 /* Push the declarations of builtin types into the namespace.
3597 RID_INDEX is the index of the builtin type in the array
3598 RID_POINTERS. NAME is the name used when looking up the builtin
3599 type. TYPE is the _TYPE node for the builtin type. */
3602 record_builtin_type (enum rid rid_index
,
3606 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3607 tree tdecl
= NULL_TREE
;
3609 if ((int) rid_index
< (int) RID_MAX
)
3610 rname
= ridpointers
[(int) rid_index
];
3612 tname
= get_identifier (name
);
3614 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3615 eliminated. Built-in types should not be looked up name; their
3616 names are keywords that the parser can recognize. However, there
3617 is code in c-common.c that uses identifier_global_value to look
3618 up built-in types by name. */
3621 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3622 DECL_ARTIFICIAL (tdecl
) = 1;
3623 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3629 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3630 DECL_ARTIFICIAL (tdecl
) = 1;
3632 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3635 if (!TYPE_NAME (type
))
3636 TYPE_NAME (type
) = tdecl
;
3639 debug_hooks
->type_decl (tdecl
, 0);
3642 /* Record one of the standard Java types.
3643 * Declare it as having the given NAME.
3644 * If SIZE > 0, it is the size of one of the integral types;
3645 * otherwise it is the negative of the size of one of the other types. */
3648 record_builtin_java_type (const char* name
, int size
)
3653 type
= build_nonstandard_integer_type (size
, 0);
3654 type
= build_distinct_type_copy (type
);
3656 else if (size
> -32)
3659 /* "__java_char" or ""__java_boolean". */
3660 type
= build_nonstandard_integer_type (-size
, 1);
3661 type
= build_distinct_type_copy (type
);
3662 /* Get the signed type cached and attached to the unsigned type,
3663 so it doesn't get garbage-collected at "random" times,
3664 causing potential codegen differences out of different UIDs
3665 and different alias set numbers. */
3666 stype
= build_nonstandard_integer_type (-size
, 0);
3667 stype
= build_distinct_type_copy (stype
);
3668 TREE_CHAIN (type
) = stype
;
3669 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3672 { /* "__java_float" or ""__java_double". */
3673 type
= make_node (REAL_TYPE
);
3674 TYPE_PRECISION (type
) = - size
;
3677 record_builtin_type (RID_MAX
, name
, type
);
3678 decl
= TYPE_NAME (type
);
3680 /* Suppress generate debug symbol entries for these types,
3681 since for normal C++ they are just clutter.
3682 However, push_lang_context undoes this if extern "Java" is seen. */
3683 DECL_IGNORED_P (decl
) = 1;
3685 TYPE_FOR_JAVA (type
) = 1;
3689 /* Push a type into the namespace so that the back ends ignore it. */
3692 record_unknown_type (tree type
, const char* name
)
3694 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3695 TYPE_DECL
, get_identifier (name
), type
));
3696 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3697 DECL_IGNORED_P (decl
) = 1;
3698 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3699 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3700 TYPE_ALIGN (type
) = 1;
3701 TYPE_USER_ALIGN (type
) = 0;
3702 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3705 /* A string for which we should create an IDENTIFIER_NODE at
3708 typedef struct predefined_identifier
3710 /* The name of the identifier. */
3711 const char *const name
;
3712 /* The place where the IDENTIFIER_NODE should be stored. */
3714 /* Nonzero if this is the name of a constructor or destructor. */
3715 const int ctor_or_dtor_p
;
3716 } predefined_identifier
;
3718 /* Create all the predefined identifiers. */
3721 initialize_predefined_identifiers (void)
3723 const predefined_identifier
*pid
;
3725 /* A table of identifiers to create at startup. */
3726 static const predefined_identifier predefined_identifiers
[] = {
3727 { "C++", &lang_name_cplusplus
, 0 },
3728 { "C", &lang_name_c
, 0 },
3729 { "Java", &lang_name_java
, 0 },
3730 /* Some of these names have a trailing space so that it is
3731 impossible for them to conflict with names written by users. */
3732 { "__ct ", &ctor_identifier
, 1 },
3733 { "__base_ctor ", &base_ctor_identifier
, 1 },
3734 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3735 { "__dt ", &dtor_identifier
, 1 },
3736 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3737 { "__base_dtor ", &base_dtor_identifier
, 1 },
3738 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3739 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3740 { "nelts", &nelts_identifier
, 0 },
3741 { THIS_NAME
, &this_identifier
, 0 },
3742 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3743 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3744 { "_vptr", &vptr_identifier
, 0 },
3745 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3746 { "::", &global_scope_name
, 0 },
3747 { "std", &std_identifier
, 0 },
3751 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3753 *pid
->node
= get_identifier (pid
->name
);
3754 if (pid
->ctor_or_dtor_p
)
3755 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3759 /* Create the predefined scalar types of C,
3760 and some nodes representing standard constants (0, 1, (void *)0).
3761 Initialize the global binding level.
3762 Make definitions for built-in primitive functions. */
3765 cxx_init_decl_processing (void)
3768 tree void_ftype_ptr
;
3770 /* Create all the identifiers we need. */
3771 initialize_predefined_identifiers ();
3773 /* Create the global variables. */
3774 push_to_top_level ();
3776 current_function_decl
= NULL_TREE
;
3777 current_binding_level
= NULL
;
3778 /* Enter the global namespace. */
3779 gcc_assert (global_namespace
== NULL_TREE
);
3780 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3782 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3783 TREE_PUBLIC (global_namespace
) = 1;
3784 begin_scope (sk_namespace
, global_namespace
);
3786 if (flag_visibility_ms_compat
)
3787 default_visibility
= VISIBILITY_HIDDEN
;
3790 current_lang_name
= lang_name_c
;
3792 /* Create the `std' namespace. */
3793 push_namespace (std_identifier
);
3794 std_node
= current_namespace
;
3797 c_common_nodes_and_builtins ();
3799 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3800 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3801 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3802 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3803 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3804 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3805 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3806 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3808 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3810 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3811 truthvalue_type_node
= boolean_type_node
;
3812 truthvalue_false_node
= boolean_false_node
;
3813 truthvalue_true_node
= boolean_true_node
;
3815 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3816 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3817 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3820 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3823 delta_type_node
= ptrdiff_type_node
;
3824 vtable_index_type
= ptrdiff_type_node
;
3826 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3827 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3828 void_ftype_ptr
= build_function_type_list (void_type_node
,
3829 ptr_type_node
, NULL_TREE
);
3831 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3833 /* C++ extensions */
3835 unknown_type_node
= make_node (LANG_TYPE
);
3836 record_unknown_type (unknown_type_node
, "unknown type");
3838 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3839 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3841 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3843 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3844 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3846 init_list_type_node
= make_node (LANG_TYPE
);
3847 record_unknown_type (init_list_type_node
, "init list");
3850 /* Make sure we get a unique function type, so we can give
3851 its pointer type a name. (This wins for gdb.) */
3852 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3853 TREE_TYPE (vfunc_type
) = integer_type_node
;
3854 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3855 layout_type (vfunc_type
);
3857 vtable_entry_type
= build_pointer_type (vfunc_type
);
3859 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3862 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3863 layout_type (vtbl_type_node
);
3864 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3865 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3866 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3867 layout_type (vtbl_ptr_type_node
);
3868 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3870 push_namespace (get_identifier ("__cxxabiv1"));
3871 abi_node
= current_namespace
;
3874 global_type_node
= make_node (LANG_TYPE
);
3875 record_unknown_type (global_type_node
, "global type");
3878 current_lang_name
= lang_name_cplusplus
;
3881 tree newattrs
, extvisattr
;
3882 tree newtype
, deltype
;
3883 tree ptr_ftype_sizetype
;
3887 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3888 if (cxx_dialect
== cxx98
)
3891 tree bad_alloc_type_node
;
3892 tree bad_alloc_decl
;
3894 push_namespace (std_identifier
);
3895 bad_alloc_id
= get_identifier ("bad_alloc");
3896 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3897 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3899 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3900 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3904 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3907 new_eh_spec
= noexcept_false_spec
;
3909 /* Ensure attribs.c is initialized. */
3911 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3913 newattrs
= tree_cons (get_identifier ("alloc_size"),
3914 build_tree_list (NULL_TREE
, integer_one_node
),
3916 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3917 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3918 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3919 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3920 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3921 DECL_IS_MALLOC (opnew
) = 1;
3922 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3923 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3924 DECL_IS_MALLOC (opnew
) = 1;
3925 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3926 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3927 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3929 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3930 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3931 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3932 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3933 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3934 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3935 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3936 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3940 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3941 ECF_NORETURN
| ECF_NOTHROW
);
3943 /* Perform other language dependent initializations. */
3944 init_class_processing ();
3945 init_rtti_processing ();
3946 init_template_processing ();
3948 if (flag_exceptions
)
3949 init_exception_processing ();
3951 if (! supports_one_only ())
3954 make_fname_decl
= cp_make_fname_decl
;
3955 start_fname_decls ();
3957 /* Show we use EH for cleanups. */
3958 if (flag_exceptions
)
3959 using_eh_for_cleanups ();
3962 /* Generate an initializer for a function naming variable from
3963 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3964 filled in with the type of the init. */
3967 cp_fname_init (const char* name
, tree
*type_p
)
3969 tree domain
= NULL_TREE
;
3971 tree init
= NULL_TREE
;
3976 length
= strlen (name
);
3977 domain
= build_index_type (size_int (length
));
3978 init
= build_string (length
+ 1, name
);
3981 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3982 type
= build_cplus_array_type (type
, domain
);
3987 TREE_TYPE (init
) = type
;
3989 init
= error_mark_node
;
3994 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3995 the decl, LOC is the location to give the decl, NAME is the
3996 initialization string and TYPE_DEP indicates whether NAME depended
3997 on the type of the function. We make use of that to detect
3998 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3999 at the point of first use, so we mustn't push the decl now. */
4002 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4004 const char *const name
= (type_dep
&& processing_template_decl
4005 ? NULL
: fname_as_string (type_dep
));
4007 tree init
= cp_fname_init (name
, &type
);
4008 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4011 free (CONST_CAST (char *, name
));
4013 /* As we're using pushdecl_with_scope, we must set the context. */
4014 DECL_CONTEXT (decl
) = current_function_decl
;
4016 TREE_STATIC (decl
) = 1;
4017 TREE_READONLY (decl
) = 1;
4018 DECL_ARTIFICIAL (decl
) = 1;
4020 TREE_USED (decl
) = 1;
4022 if (current_function_decl
)
4024 cp_binding_level
*b
= current_binding_level
;
4025 if (b
->kind
== sk_function_parms
)
4026 return error_mark_node
;
4027 while (b
->level_chain
->kind
!= sk_function_parms
)
4029 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4030 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4031 LOOKUP_ONLYCONVERTING
);
4035 DECL_THIS_STATIC (decl
) = true;
4036 pushdecl_top_level_and_finish (decl
, init
);
4043 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4045 tree id
= DECL_NAME (decl
);
4046 const char *name
= IDENTIFIER_POINTER (id
);
4048 retrofit_lang_decl (decl
);
4050 DECL_ARTIFICIAL (decl
) = 1;
4051 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4052 SET_DECL_LANGUAGE (decl
, lang_c
);
4053 /* Runtime library routines are, by definition, available in an
4054 external shared object. */
4055 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4056 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4058 DECL_CONTEXT (decl
) = context
;
4061 pushdecl_top_level (decl
);
4065 /* A function in the user's namespace should have an explicit
4066 declaration before it is used. Mark the built-in function as
4067 anticipated but not actually declared. */
4068 if (name
[0] != '_' || name
[1] != '_')
4069 DECL_ANTICIPATED (decl
) = 1;
4070 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4072 size_t len
= strlen (name
);
4074 /* Treat __*_chk fortification functions as anticipated as well,
4075 unless they are __builtin_*. */
4076 if (len
> strlen ("___chk")
4077 && memcmp (name
+ len
- strlen ("_chk"),
4078 "_chk", strlen ("_chk") + 1) == 0)
4079 DECL_ANTICIPATED (decl
) = 1;
4086 cxx_builtin_function (tree decl
)
4088 tree id
= DECL_NAME (decl
);
4089 const char *name
= IDENTIFIER_POINTER (id
);
4090 /* All builtins that don't begin with an '_' should additionally
4091 go in the 'std' namespace. */
4094 tree decl2
= copy_node(decl
);
4095 push_namespace (std_identifier
);
4096 builtin_function_1 (decl2
, std_node
, false);
4100 return builtin_function_1 (decl
, NULL_TREE
, false);
4103 /* Like cxx_builtin_function, but guarantee the function is added to the global
4104 scope. This is to allow function specific options to add new machine
4105 dependent builtins when the target ISA changes via attribute((target(...)))
4106 which saves space on program startup if the program does not use non-generic
4110 cxx_builtin_function_ext_scope (tree decl
)
4113 tree id
= DECL_NAME (decl
);
4114 const char *name
= IDENTIFIER_POINTER (id
);
4115 /* All builtins that don't begin with an '_' should additionally
4116 go in the 'std' namespace. */
4119 tree decl2
= copy_node(decl
);
4120 push_namespace (std_identifier
);
4121 builtin_function_1 (decl2
, std_node
, true);
4125 return builtin_function_1 (decl
, NULL_TREE
, true);
4128 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4129 function. Not called directly. */
4132 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4135 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4136 DECL_EXTERNAL (fn
) = 1;
4137 TREE_PUBLIC (fn
) = 1;
4138 DECL_ARTIFICIAL (fn
) = 1;
4139 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4140 SET_DECL_LANGUAGE (fn
, lang_c
);
4141 /* Runtime library routines are, by definition, available in an
4142 external shared object. */
4143 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4144 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4145 set_call_expr_flags (fn
, ecf_flags
);
4149 /* Returns the _DECL for a library function with C++ linkage. */
4152 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4155 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4156 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4157 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4161 /* Like build_library_fn, but takes a C string instead of an
4165 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4167 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4170 /* Like build_cp_library_fn, but takes a C string instead of an
4174 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4176 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4180 /* Like build_library_fn, but also pushes the function so that we will
4181 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4182 may throw exceptions listed in RAISES. */
4185 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4190 type
= build_exception_variant (type
, raises
);
4192 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4193 pushdecl_top_level (fn
);
4197 /* Like build_cp_library_fn, but also pushes the function so that it
4198 will be found by normal lookup. */
4201 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4204 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4209 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4213 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4217 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4219 tree type
= build_function_type (void_type_node
, parmtypes
);
4220 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4223 /* Like push_library_fn, but also note that this function throws
4224 and does not return. Used for __throw_foo and the like. */
4227 push_throw_library_fn (tree name
, tree type
)
4229 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4233 /* When we call finish_struct for an anonymous union, we create
4234 default copy constructors and such. But, an anonymous union
4235 shouldn't have such things; this function undoes the damage to the
4236 anonymous union type T.
4238 (The reason that we create the synthesized methods is that we don't
4239 distinguish `union { int i; }' from `typedef union { int i; } U'.
4240 The first is an anonymous union; the second is just an ordinary
4244 fixup_anonymous_aggr (tree t
)
4248 /* Wipe out memory of synthesized methods. */
4249 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4250 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4251 TYPE_HAS_COPY_CTOR (t
) = 0;
4252 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4253 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4254 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4256 /* Splice the implicitly generated functions out of the TYPE_METHODS
4258 q
= &TYPE_METHODS (t
);
4261 if (DECL_ARTIFICIAL (*q
))
4262 *q
= TREE_CHAIN (*q
);
4264 q
= &DECL_CHAIN (*q
);
4267 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4268 if (TYPE_METHODS (t
))
4270 tree decl
= TYPE_MAIN_DECL (t
);
4272 if (TREE_CODE (t
) != UNION_TYPE
)
4273 error_at (DECL_SOURCE_LOCATION (decl
),
4274 "an anonymous struct cannot have function members");
4276 error_at (DECL_SOURCE_LOCATION (decl
),
4277 "an anonymous union cannot have function members");
4280 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4281 assignment operators (because they cannot have these methods themselves).
4282 For anonymous unions this is already checked because they are not allowed
4283 in any union, otherwise we have to check it. */
4284 if (TREE_CODE (t
) != UNION_TYPE
)
4288 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4289 if (TREE_CODE (field
) == FIELD_DECL
)
4291 type
= TREE_TYPE (field
);
4292 if (CLASS_TYPE_P (type
))
4294 if (TYPE_NEEDS_CONSTRUCTING (type
))
4295 error ("member %q+#D with constructor not allowed "
4296 "in anonymous aggregate", field
);
4297 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4298 error ("member %q+#D with destructor not allowed "
4299 "in anonymous aggregate", field
);
4300 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4301 error ("member %q+#D with copy assignment operator "
4302 "not allowed in anonymous aggregate", field
);
4308 /* Warn for an attribute located at LOCATION that appertains to the
4309 class type CLASS_TYPE that has not been properly placed after its
4310 class-key, in it class-specifier. */
4313 warn_misplaced_attr_for_class_type (source_location location
,
4316 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4318 if (warning_at (location
, OPT_Wattributes
,
4319 "attribute ignored in declaration "
4320 "of %q#T", class_type
))
4322 "attribute for %q#T must follow the %qs keyword",
4323 class_type
, class_key_or_enum_as_string (class_type
));
4326 /* Make sure that a declaration with no declarator is well-formed, i.e.
4327 just declares a tagged type or anonymous union.
4329 Returns the type declared; or NULL_TREE if none. */
4332 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4333 bool explicit_type_instantiation_p
)
4335 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4336 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4337 /* If a class, struct, or enum type is declared by the DECLSPECS
4338 (i.e, if a class-specifier, enum-specifier, or non-typename
4339 elaborated-type-specifier appears in the DECLSPECS),
4340 DECLARED_TYPE is set to the corresponding type. */
4341 tree declared_type
= NULL_TREE
;
4342 bool error_p
= false;
4344 if (declspecs
->multiple_types_p
)
4345 error ("multiple types in one declaration");
4346 else if (declspecs
->redefined_builtin_type
)
4348 if (!in_system_header_at (input_location
))
4349 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4350 "redeclaration of C++ built-in type %qT",
4351 declspecs
->redefined_builtin_type
);
4356 && TYPE_P (declspecs
->type
)
4357 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4358 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4359 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4360 declared_type
= declspecs
->type
;
4361 else if (declspecs
->type
== error_mark_node
)
4363 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4364 permerror (input_location
, "declaration does not declare anything");
4365 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4367 error ("%<auto%> can only be specified for variables "
4368 "or function declarations");
4369 return error_mark_node
;
4371 /* Check for an anonymous union. */
4372 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4373 && TYPE_ANONYMOUS_P (declared_type
))
4375 /* 7/3 In a simple-declaration, the optional init-declarator-list
4376 can be omitted only when declaring a class (clause 9) or
4377 enumeration (7.2), that is, when the decl-specifier-seq contains
4378 either a class-specifier, an elaborated-type-specifier with
4379 a class-key (9.1), or an enum-specifier. In these cases and
4380 whenever a class-specifier or enum-specifier is present in the
4381 decl-specifier-seq, the identifiers in these specifiers are among
4382 the names being declared by the declaration (as class-name,
4383 enum-names, or enumerators, depending on the syntax). In such
4384 cases, and except for the declaration of an unnamed bit-field (9.6),
4385 the decl-specifier-seq shall introduce one or more names into the
4386 program, or shall redeclare a name introduced by a previous
4387 declaration. [Example:
4388 enum { }; // ill-formed
4389 typedef class { }; // ill-formed
4393 error ("missing type-name in typedef-declaration");
4396 /* Anonymous unions are objects, so they can have specifiers. */;
4397 SET_ANON_AGGR_TYPE_P (declared_type
);
4399 if (TREE_CODE (declared_type
) != UNION_TYPE
4400 && !in_system_header_at (input_location
))
4401 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4406 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4407 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4408 error ("%qs can only be specified for functions",
4409 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4410 ? "inline" : "virtual");
4412 && (!current_class_type
4413 || current_scope () != current_class_type
))
4414 error ("%<friend%> can only be specified inside a class");
4415 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4416 error ("%<explicit%> can only be specified for constructors");
4417 else if (declspecs
->storage_class
)
4418 error ("a storage class can only be specified for objects "
4420 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4421 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4422 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4423 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4424 error ("qualifiers can only be specified for objects "
4426 else if (saw_typedef
)
4427 warning (0, "%<typedef%> was ignored in this declaration");
4428 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4429 error ("%<constexpr%> cannot be used for type declarations");
4432 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4435 if (!CLASS_TYPE_P (declared_type
)
4436 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4437 /* For a non-template class, use the name location. */
4438 loc
= location_of (declared_type
);
4440 /* For a template class (an explicit instantiation), use the
4441 current location. */
4442 loc
= input_location
;
4444 if (explicit_type_instantiation_p
)
4445 /* [dcl.attr.grammar]/4:
4447 No attribute-specifier-seq shall appertain to an explicit
4450 if (warning_at (loc
, OPT_Wattributes
,
4451 "attribute ignored in explicit instantiation %q#T",
4454 "no attribute can be applied to "
4455 "an explicit instantiation");
4458 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4461 return declared_type
;
4464 /* Called when a declaration is seen that contains no names to declare.
4465 If its type is a reference to a structure, union or enum inherited
4466 from a containing scope, shadow that tag name for the current scope
4467 with a forward reference.
4468 If its type defines a new named structure or union
4469 or defines an enum, it is valid but we need not do anything here.
4470 Otherwise, it is an error.
4472 C++: may have to grok the declspecs to learn about static,
4473 complain for anonymous unions.
4475 Returns the TYPE declared -- or NULL_TREE if none. */
4478 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4480 tree t
= check_tag_decl (declspecs
,
4481 /*explicit_type_instantiation_p=*/false);
4486 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4489 /* This is where the variables in an anonymous union are
4490 declared. An anonymous union declaration looks like:
4492 because there is no declarator after the union, the parser
4493 sends that declaration here. */
4494 if (ANON_AGGR_TYPE_P (t
))
4496 fixup_anonymous_aggr (t
);
4498 if (TYPE_FIELDS (t
))
4500 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4501 declspecs
, NORMAL
, 0, NULL
);
4502 finish_anon_union (decl
);
4509 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4512 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4513 const cp_declarator
*declarator
,
4514 bool is_template_arg
)
4518 enum decl_context context
4519 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4520 attrs
= type_specifiers
->attributes
;
4521 type_specifiers
->attributes
= NULL_TREE
;
4522 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4523 if (attrs
&& type
!= error_mark_node
)
4525 if (CLASS_TYPE_P (type
))
4526 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4527 "outside of definition", type
);
4528 else if (MAYBE_CLASS_TYPE_P (type
))
4529 /* A template type parameter or other dependent type. */
4530 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4531 "type %qT without an associated declaration", type
);
4533 cplus_decl_attributes (&type
, attrs
, 0);
4538 /* Process a DECLARATOR for a function-scope variable declaration,
4539 namespace-scope variable declaration, or function declaration.
4540 (Function definitions go through start_function; class member
4541 declarations appearing in the body of the class go through
4542 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4543 If an error occurs, the error_mark_node is returned instead.
4545 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4546 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4547 for an explicitly defaulted function, or SD_DELETED for an explicitly
4548 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4549 implicitly initialized via a default constructor. ATTRIBUTES and
4550 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4552 The scope represented by the context of the returned DECL is pushed
4553 (if it is not the global namespace) and is assigned to
4554 *PUSHED_SCOPE_P. The caller is then responsible for calling
4555 pop_scope on *PUSHED_SCOPE_P if it is set. */
4558 start_decl (const cp_declarator
*declarator
,
4559 cp_decl_specifier_seq
*declspecs
,
4562 tree prefix_attributes
,
4563 tree
*pushed_scope_p
)
4571 *pushed_scope_p
= NULL_TREE
;
4573 /* An object declared as __attribute__((deprecated)) suppresses
4574 warnings of uses of other deprecated items. */
4575 if (lookup_attribute ("deprecated", attributes
))
4576 deprecated_state
= DEPRECATED_SUPPRESS
;
4578 attributes
= chainon (attributes
, prefix_attributes
);
4580 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4583 deprecated_state
= DEPRECATED_NORMAL
;
4585 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4586 || decl
== error_mark_node
)
4587 return error_mark_node
;
4589 context
= CP_DECL_CONTEXT (decl
);
4590 if (context
!= global_namespace
)
4591 *pushed_scope_p
= push_scope (context
);
4594 /* Is it valid for this decl to have an initializer at all?
4595 If not, set INITIALIZED to zero, which will indirectly
4596 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4597 switch (TREE_CODE (decl
))
4600 error ("typedef %qD is initialized (use decltype instead)", decl
);
4601 return error_mark_node
;
4604 if (initialized
== SD_DELETED
)
4605 /* We'll handle the rest of the semantics later, but we need to
4606 set this now so it's visible to duplicate_decls. */
4607 DECL_DELETED_FN (decl
) = 1;
4616 if (! toplevel_bindings_p ()
4617 && DECL_EXTERNAL (decl
))
4618 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4620 DECL_EXTERNAL (decl
) = 0;
4621 if (toplevel_bindings_p ())
4622 TREE_STATIC (decl
) = 1;
4624 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4626 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4627 record_key_method_defined (decl
);
4629 /* If this is a typedef that names the class for linkage purposes
4630 (7.1.3p8), apply any attributes directly to the type. */
4631 if (TREE_CODE (decl
) == TYPE_DECL
4632 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4633 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4634 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4638 /* Set attributes here so if duplicate decl, will have proper attributes. */
4639 cplus_decl_attributes (&decl
, attributes
, flags
);
4641 /* Dllimported symbols cannot be defined. Static data members (which
4642 can be initialized in-class and dllimported) go through grokfield,
4643 not here, so we don't need to exclude those decls when checking for
4645 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4647 error ("definition of %q#D is marked %<dllimport%>", decl
);
4648 DECL_DLLIMPORT_P (decl
) = 0;
4651 /* If #pragma weak was used, mark the decl weak now. */
4652 if (!processing_template_decl
)
4653 maybe_apply_pragma_weak (decl
);
4655 if (TREE_CODE (decl
) == FUNCTION_DECL
4656 && DECL_DECLARED_INLINE_P (decl
)
4657 && DECL_UNINLINABLE (decl
)
4658 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4659 warning (0, "inline function %q+D given attribute noinline", decl
);
4661 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4663 bool this_tmpl
= (processing_template_decl
4664 > template_class_depth (context
));
4667 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4668 if (field
== NULL_TREE
4669 || !(VAR_P (field
) || variable_template_p (field
)))
4670 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4671 else if (variable_template_p (field
) && !this_tmpl
)
4673 if (DECL_LANG_SPECIFIC (decl
)
4674 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4675 /* OK, specialization was already checked. */;
4678 error_at (DECL_SOURCE_LOCATION (decl
),
4679 "non-member-template declaration of %qD", decl
);
4680 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4681 "member template declaration here");
4682 return error_mark_node
;
4687 if (variable_template_p (field
))
4688 field
= DECL_TEMPLATE_RESULT (field
);
4690 if (DECL_CONTEXT (field
) != context
)
4692 if (!same_type_p (DECL_CONTEXT (field
), context
))
4693 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4694 "to be defined as %<%T::%D%>",
4695 DECL_CONTEXT (field
), DECL_NAME (decl
),
4696 context
, DECL_NAME (decl
));
4697 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4699 /* Static data member are tricky; an in-class initialization
4700 still doesn't provide a definition, so the in-class
4701 declaration will have DECL_EXTERNAL set, but will have an
4702 initialization. Thus, duplicate_decls won't warn
4703 about this situation, and so we check here. */
4704 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4705 error ("duplicate initialization of %qD", decl
);
4706 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4708 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4709 && !DECL_DECLARED_CONSTEXPR_P (field
))
4710 error ("%qD declared %<constexpr%> outside its class", field
);
4715 tree field
= check_classfn (context
, decl
,
4717 ? current_template_parms
4719 if (field
&& field
!= error_mark_node
4720 && duplicate_decls (decl
, field
,
4721 /*newdecl_is_friend=*/false))
4725 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4726 DECL_IN_AGGR_P (decl
) = 0;
4727 /* Do not mark DECL as an explicit specialization if it was not
4728 already marked as an instantiation; a declaration should
4729 never be marked as a specialization unless we know what
4730 template is being specialized. */
4731 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4733 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4734 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4735 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4736 && DECL_DECLARED_INLINE_P (decl
));
4738 DECL_COMDAT (decl
) = false;
4740 /* [temp.expl.spec] An explicit specialization of a static data
4741 member of a template is a definition if the declaration
4742 includes an initializer; otherwise, it is a declaration.
4744 We check for processing_specialization so this only applies
4745 to the new specialization syntax. */
4746 if (!initialized
&& processing_specialization
)
4747 DECL_EXTERNAL (decl
) = 1;
4750 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4751 /* Aliases are definitions. */
4753 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4757 was_public
= TREE_PUBLIC (decl
);
4759 /* Enter this declaration into the symbol table. */
4760 decl
= maybe_push_decl (decl
);
4762 if (processing_template_decl
)
4763 decl
= push_template_decl (decl
);
4764 if (decl
== error_mark_node
)
4765 return error_mark_node
;
4768 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4769 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4771 /* This is a const variable with implicit 'static'. Set
4772 DECL_THIS_STATIC so we can tell it from variables that are
4773 !TREE_PUBLIC because of the anonymous namespace. */
4774 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4775 DECL_THIS_STATIC (decl
) = 1;
4778 if (current_function_decl
&& VAR_P (decl
)
4779 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4782 if (DECL_THREAD_LOCAL_P (decl
))
4783 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4785 else if (TREE_STATIC (decl
))
4786 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4790 cp_function_chain
->invalid_constexpr
= true;
4793 if (!processing_template_decl
&& VAR_P (decl
))
4794 start_decl_1 (decl
, initialized
);
4799 /* Process the declaration of a variable DECL. INITIALIZED is true
4800 iff DECL is explicitly initialized. (INITIALIZED is false if the
4801 variable is initialized via an implicitly-called constructor.)
4802 This function must be called for ordinary variables (including, for
4803 example, implicit instantiations of templates), but must not be
4804 called for template declarations. */
4807 start_decl_1 (tree decl
, bool initialized
)
4811 bool aggregate_definition_p
;
4813 gcc_assert (!processing_template_decl
);
4815 if (error_operand_p (decl
))
4818 gcc_assert (VAR_P (decl
));
4820 type
= TREE_TYPE (decl
);
4821 complete_p
= COMPLETE_TYPE_P (type
);
4822 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4824 /* If an explicit initializer is present, or if this is a definition
4825 of an aggregate, then we need a complete type at this point.
4826 (Scalars are always complete types, so there is nothing to
4827 check.) This code just sets COMPLETE_P; errors (if necessary)
4828 are issued below. */
4829 if ((initialized
|| aggregate_definition_p
)
4831 && COMPLETE_TYPE_P (complete_type (type
)))
4834 /* We will not yet have set TREE_READONLY on DECL if the type
4835 was "const", but incomplete, before this point. But, now, we
4836 have a complete type, so we can try again. */
4837 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4841 /* Is it valid for this decl to have an initializer at all? */
4843 /* Don't allow initializations for incomplete types except for
4844 arrays which might be completed by the initialization. */
4846 ; /* A complete type is ok. */
4847 else if (type_uses_auto (type
))
4848 ; /* An auto type is ok. */
4849 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4851 error ("variable %q#D has initializer but incomplete type", decl
);
4852 type
= TREE_TYPE (decl
) = error_mark_node
;
4854 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4856 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4857 error ("elements of array %q#D have incomplete type", decl
);
4858 /* else we already gave an error in start_decl. */
4861 else if (aggregate_definition_p
&& !complete_p
)
4863 if (type_uses_auto (type
))
4864 error ("declaration of %q#D has no initializer", decl
);
4866 error ("aggregate %q#D has incomplete type and cannot be defined",
4868 /* Change the type so that assemble_variable will give
4869 DECL an rtl we can live with: (mem (const_int 0)). */
4870 type
= TREE_TYPE (decl
) = error_mark_node
;
4873 /* Create a new scope to hold this declaration if necessary.
4874 Whether or not a new scope is necessary cannot be determined
4875 until after the type has been completed; if the type is a
4876 specialization of a class template it is not until after
4877 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4878 will be set correctly. */
4879 maybe_push_cleanup_level (type
);
4882 /* Handle initialization of references. DECL, TYPE, and INIT have the
4883 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4884 but will be set to a new CLEANUP_STMT if a temporary is created
4885 that must be destroyed subsequently.
4887 Returns an initializer expression to use to initialize DECL, or
4888 NULL if the initialization can be performed statically.
4890 Quotes on semantics can be found in ARM 8.4.3. */
4893 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4895 if (init
== NULL_TREE
)
4897 if ((DECL_LANG_SPECIFIC (decl
) == 0
4898 || DECL_IN_AGGR_P (decl
) == 0)
4899 && ! DECL_THIS_EXTERN (decl
))
4900 error ("%qD declared as reference but not initialized", decl
);
4904 if (TREE_CODE (init
) == TREE_LIST
)
4905 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4906 tf_warning_or_error
);
4908 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4909 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4910 /* Note: default conversion is only called in very special cases. */
4911 init
= decay_conversion (init
, tf_warning_or_error
);
4913 /* Convert INIT to the reference type TYPE. This may involve the
4914 creation of a temporary, whose lifetime must be the same as that
4915 of the reference. If so, a DECL_EXPR for the temporary will be
4916 added just after the DECL_EXPR for DECL. That's why we don't set
4917 DECL_INITIAL for local references (instead assigning to them
4918 explicitly); we need to allow the temporary to be initialized
4920 return initialize_reference (type
, init
, flags
,
4921 tf_warning_or_error
);
4924 /* Designated initializers in arrays are not supported in GNU C++.
4925 The parser cannot detect this error since it does not know whether
4926 a given brace-enclosed initializer is for a class type or for an
4927 array. This function checks that CE does not use a designated
4928 initializer. If it does, an error is issued. Returns true if CE
4929 is valid, i.e., does not have a designated initializer. */
4932 check_array_designated_initializer (constructor_elt
*ce
,
4933 unsigned HOST_WIDE_INT index
)
4935 /* Designated initializers for array elements are not supported. */
4938 /* The parser only allows identifiers as designated
4940 if (ce
->index
== error_mark_node
)
4942 error ("name used in a GNU-style designated "
4943 "initializer for an array");
4946 else if (identifier_p (ce
->index
))
4948 error ("name %qD used in a GNU-style designated "
4949 "initializer for an array", ce
->index
);
4953 ce
->index
= cxx_constant_value (ce
->index
);
4955 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4957 /* A C99 designator is OK if it matches the current index. */
4958 if (wi::eq_p (ce
->index
, index
))
4961 sorry ("non-trivial designated initializers not supported");
4972 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4973 array until we finish parsing the initializer. If that's the
4974 situation we're in, update DECL accordingly. */
4977 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4979 tree type
= TREE_TYPE (decl
);
4981 if (TREE_CODE (type
) == ARRAY_TYPE
4982 && TYPE_DOMAIN (type
) == NULL_TREE
4983 && TREE_CODE (decl
) != TYPE_DECL
)
4985 /* do_default is really a C-ism to deal with tentative definitions.
4986 But let's leave it here to ease the eventual merge. */
4987 int do_default
= !DECL_EXTERNAL (decl
);
4988 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4991 /* Check that there are no designated initializers in INIT, as
4992 those are not supported in GNU C++, and as the middle-end
4993 will crash if presented with a non-numeric designated
4995 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
4997 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4998 constructor_elt
*ce
;
5000 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5001 if (!check_array_designated_initializer (ce
, i
))
5007 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5011 error ("initializer fails to determine size of %qD", decl
);
5013 else if (failure
== 2)
5017 error ("array size missing in %qD", decl
);
5019 /* If a `static' var's size isn't known, make it extern as
5020 well as static, so it does not get allocated. If it's not
5021 `static', then don't mark it extern; finish_incomplete_decl
5022 will give it a default size and it will get allocated. */
5023 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5024 DECL_EXTERNAL (decl
) = 1;
5026 else if (failure
== 3)
5028 error ("zero-size array %qD", decl
);
5032 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5034 relayout_decl (decl
);
5038 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5039 any appropriate error messages regarding the layout. */
5042 layout_var_decl (tree decl
)
5046 type
= TREE_TYPE (decl
);
5047 if (type
== error_mark_node
)
5050 /* If we haven't already laid out this declaration, do so now.
5051 Note that we must not call complete type for an external object
5052 because it's type might involve templates that we are not
5053 supposed to instantiate yet. (And it's perfectly valid to say
5054 `extern X x' for some incomplete type `X'.) */
5055 if (!DECL_EXTERNAL (decl
))
5056 complete_type (type
);
5057 if (!DECL_SIZE (decl
)
5058 && TREE_TYPE (decl
) != error_mark_node
5059 && (COMPLETE_TYPE_P (type
)
5060 || (TREE_CODE (type
) == ARRAY_TYPE
5061 && !TYPE_DOMAIN (type
)
5062 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5063 layout_decl (decl
, 0);
5065 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5067 /* An automatic variable with an incomplete type: that is an error.
5068 Don't talk about array types here, since we took care of that
5069 message in grokdeclarator. */
5070 error ("storage size of %qD isn%'t known", decl
);
5071 TREE_TYPE (decl
) = error_mark_node
;
5074 /* Keep this code around in case we later want to control debug info
5075 based on whether a type is "used". (jason 1999-11-11) */
5077 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5078 /* Let debugger know it should output info for this type. */
5079 note_debug_info_needed (ttype
);
5081 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5082 note_debug_info_needed (DECL_CONTEXT (decl
));
5085 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5086 && DECL_SIZE (decl
) != NULL_TREE
5087 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5089 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5090 constant_expression_warning (DECL_SIZE (decl
));
5093 error ("storage size of %qD isn%'t constant", decl
);
5094 TREE_TYPE (decl
) = error_mark_node
;
5099 /* If a local static variable is declared in an inline function, or if
5100 we have a weak definition, we must endeavor to create only one
5101 instance of the variable at link-time. */
5104 maybe_commonize_var (tree decl
)
5106 /* Static data in a function with comdat linkage also has comdat
5108 if (TREE_STATIC (decl
)
5109 /* Don't mess with __FUNCTION__. */
5110 && ! DECL_ARTIFICIAL (decl
)
5111 && DECL_FUNCTION_SCOPE_P (decl
)
5112 && vague_linkage_p (DECL_CONTEXT (decl
)))
5116 /* With weak symbols, we simply make the variable COMDAT;
5117 that will cause copies in multiple translations units to
5119 comdat_linkage (decl
);
5123 if (DECL_INITIAL (decl
) == NULL_TREE
5124 || DECL_INITIAL (decl
) == error_mark_node
)
5126 /* Without weak symbols, we can use COMMON to merge
5127 uninitialized variables. */
5128 TREE_PUBLIC (decl
) = 1;
5129 DECL_COMMON (decl
) = 1;
5133 /* While for initialized variables, we must use internal
5134 linkage -- which means that multiple copies will not
5136 TREE_PUBLIC (decl
) = 0;
5137 DECL_COMMON (decl
) = 0;
5138 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5139 "sorry: semantics of inline function static "
5140 "data %q#D are wrong (you%'ll wind up "
5141 "with multiple copies)", decl
))
5142 inform (DECL_SOURCE_LOCATION (decl
),
5143 "you can work around this by removing the initializer");
5149 /* Issue an error message if DECL is an uninitialized const variable. */
5152 check_for_uninitialized_const_var (tree decl
)
5154 tree type
= strip_array_types (TREE_TYPE (decl
));
5156 /* ``Unless explicitly declared extern, a const object does not have
5157 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5160 && TREE_CODE (type
) != REFERENCE_TYPE
5161 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5162 && !DECL_INITIAL (decl
))
5164 tree field
= default_init_uninitialized_part (type
);
5168 if (CP_TYPE_CONST_P (type
))
5169 permerror (DECL_SOURCE_LOCATION (decl
),
5170 "uninitialized const %qD", decl
);
5173 error_at (DECL_SOURCE_LOCATION (decl
),
5174 "uninitialized variable %qD in %<constexpr%> function",
5176 cp_function_chain
->invalid_constexpr
= true;
5179 if (CLASS_TYPE_P (type
))
5181 tree defaulted_ctor
;
5183 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5184 "%q#T has no user-provided default constructor", type
);
5185 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5187 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5188 "constructor is not user-provided because it is "
5189 "explicitly defaulted in the class body");
5190 inform (0, "and the implicitly-defined constructor does not "
5191 "initialize %q+#D", field
);
5196 /* Structure holding the current initializer being processed by reshape_init.
5197 CUR is a pointer to the current element being processed, END is a pointer
5198 after the last element present in the initializer. */
5199 typedef struct reshape_iterator_t
5201 constructor_elt
*cur
;
5202 constructor_elt
*end
;
5205 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5207 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5208 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5209 initialized. If there are no more such fields, the return value
5213 next_initializable_field (tree field
)
5216 && (TREE_CODE (field
) != FIELD_DECL
5217 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5218 || DECL_ARTIFICIAL (field
)))
5219 field
= DECL_CHAIN (field
);
5224 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5225 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5226 INTEGER_CST representing the size of the array minus one (the maximum index),
5227 or NULL_TREE if the array was declared without specifying the size. D is
5228 the iterator within the constructor. */
5231 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5232 tsubst_flags_t complain
)
5235 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5236 unsigned HOST_WIDE_INT max_index_cst
= 0;
5237 unsigned HOST_WIDE_INT index
;
5239 /* The initializer for an array is always a CONSTRUCTOR. */
5240 new_init
= build_constructor (init_list_type_node
, NULL
);
5244 /* Minus 1 is used for zero sized arrays. */
5245 if (integer_all_onesp (max_index
))
5248 if (tree_fits_uhwi_p (max_index
))
5249 max_index_cst
= tree_to_uhwi (max_index
);
5250 /* sizetype is sign extended, not zero extended. */
5252 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5255 /* Loop until there are no more initializers. */
5257 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5261 constructor_elt
*old_cur
= d
->cur
;
5263 check_array_designated_initializer (d
->cur
, index
);
5264 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5266 if (elt_init
== error_mark_node
)
5267 return error_mark_node
;
5268 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5269 size_int (index
), elt_init
);
5270 if (!TREE_CONSTANT (elt_init
))
5271 TREE_CONSTANT (new_init
) = false;
5273 /* This can happen with an invalid initializer (c++/54501). */
5274 if (d
->cur
== old_cur
&& !sized_array_p
)
5281 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5282 Parameters are the same of reshape_init_r. */
5285 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5287 tree max_index
= NULL_TREE
;
5289 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5291 if (TYPE_DOMAIN (type
))
5292 max_index
= array_type_nelts (type
);
5294 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5297 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5298 Parameters are the same of reshape_init_r. */
5301 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5303 tree max_index
= NULL_TREE
;
5305 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5307 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5309 tree value
= d
->cur
->value
;
5310 if (!same_type_p (TREE_TYPE (value
), type
))
5312 if (complain
& tf_error
)
5313 error ("invalid type %qT as initializer for a vector of type %qT",
5314 TREE_TYPE (d
->cur
->value
), type
);
5315 value
= error_mark_node
;
5321 /* For a vector, we initialize it as an array of the appropriate size. */
5322 if (TREE_CODE (type
) == VECTOR_TYPE
)
5323 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5325 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5328 /* Subroutine of reshape_init_r, processes the initializers for classes
5329 or union. Parameters are the same of reshape_init_r. */
5332 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5333 tsubst_flags_t complain
)
5338 gcc_assert (CLASS_TYPE_P (type
));
5340 /* The initializer for a class is always a CONSTRUCTOR. */
5341 new_init
= build_constructor (init_list_type_node
, NULL
);
5342 field
= next_initializable_field (TYPE_FIELDS (type
));
5348 An initializer for an aggregate member that is an
5349 empty class shall have the form of an empty
5350 initializer-list {}. */
5351 if (!first_initializer_p
)
5353 if (complain
& tf_error
)
5354 error ("initializer for %qT must be brace-enclosed", type
);
5355 return error_mark_node
;
5360 /* Loop through the initializable fields, gathering initializers. */
5361 while (d
->cur
!= d
->end
)
5364 constructor_elt
*old_cur
= d
->cur
;
5366 /* Handle designated initializers, as an extension. */
5369 if (d
->cur
->index
== error_mark_node
)
5370 return error_mark_node
;
5372 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5373 /* We already reshaped this. */
5374 gcc_assert (d
->cur
->index
== field
);
5375 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5376 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5379 if (complain
& tf_error
)
5380 error ("%<[%E] =%> used in a GNU-style designated initializer"
5381 " for class %qT", d
->cur
->index
, type
);
5382 return error_mark_node
;
5385 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5387 if (complain
& tf_error
)
5388 error ("%qT has no non-static data member named %qD", type
,
5390 return error_mark_node
;
5394 /* If we processed all the member of the class, we are done. */
5398 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5399 /*first_initializer_p=*/false, complain
);
5400 if (field_init
== error_mark_node
)
5401 return error_mark_node
;
5403 if (d
->cur
== old_cur
&& d
->cur
->index
)
5405 /* This can happen with an invalid initializer for a flexible
5406 array member (c++/54441). */
5407 if (complain
& tf_error
)
5408 error ("invalid initializer for %q#D", field
);
5409 return error_mark_node
;
5412 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5416 When a union is initialized with a brace-enclosed
5417 initializer, the braces shall only contain an
5418 initializer for the first member of the union. */
5419 if (TREE_CODE (type
) == UNION_TYPE
)
5422 field
= next_initializable_field (DECL_CHAIN (field
));
5428 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5429 designators are not valid; either complain or return true to indicate
5430 that reshape_init_r should return error_mark_node. */
5433 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5437 if (complain
& tf_error
)
5438 error ("C99 designator %qE outside aggregate initializer",
5446 /* Subroutine of reshape_init, which processes a single initializer (part of
5447 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5448 iterator within the CONSTRUCTOR which points to the initializer to process.
5449 FIRST_INITIALIZER_P is true if this is the first initializer of the
5450 outermost CONSTRUCTOR node. */
5453 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5454 tsubst_flags_t complain
)
5456 tree init
= d
->cur
->value
;
5458 if (error_operand_p (init
))
5459 return error_mark_node
;
5461 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5462 && has_designator_problem (d
, complain
))
5463 return error_mark_node
;
5465 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5467 /* A complex type can be initialized from one or two initializers,
5468 but braces are not elided. */
5470 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5472 if (CONSTRUCTOR_NELTS (init
) > 2)
5474 if (complain
& tf_error
)
5475 error ("too many initializers for %qT", type
);
5477 return error_mark_node
;
5480 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5482 vec
<constructor_elt
, va_gc
> *v
= 0;
5483 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5484 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5485 if (has_designator_problem (d
, complain
))
5486 return error_mark_node
;
5488 init
= build_constructor (init_list_type_node
, v
);
5493 /* A non-aggregate type is always initialized with a single
5495 if (!CP_AGGREGATE_TYPE_P (type
))
5497 /* It is invalid to initialize a non-aggregate type with a
5498 brace-enclosed initializer before C++0x.
5499 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5500 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5501 a CONSTRUCTOR (with a record type). */
5502 if (TREE_CODE (init
) == CONSTRUCTOR
5503 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5505 if (SCALAR_TYPE_P (type
))
5507 if (complain
& tf_error
)
5508 error ("braces around scalar initializer for type %qT", type
);
5509 init
= error_mark_node
;
5512 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5519 /* "If T is a class type and the initializer list has a single element of
5520 type cv U, where U is T or a class derived from T, the object is
5521 initialized from that element." Even if T is an aggregate. */
5522 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5523 && first_initializer_p
5524 && d
->end
- d
->cur
== 1
5525 && reference_related_p (type
, TREE_TYPE (init
)))
5533 All implicit type conversions (clause _conv_) are considered when
5534 initializing the aggregate member with an initializer from an
5535 initializer-list. If the initializer can initialize a member,
5536 the member is initialized. Otherwise, if the member is itself a
5537 non-empty subaggregate, brace elision is assumed and the
5538 initializer is considered for the initialization of the first
5539 member of the subaggregate. */
5540 if (TREE_CODE (init
) != CONSTRUCTOR
5541 /* But don't try this for the first initializer, since that would be
5542 looking through the outermost braces; A a2 = { a1 }; is not a
5543 valid aggregate initialization. */
5544 && !first_initializer_p
5545 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5546 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5553 /* [dcl.init.string]
5555 A char array (whether plain char, signed char, or unsigned char)
5556 can be initialized by a string-literal (optionally enclosed in
5557 braces); a wchar_t array can be initialized by a wide
5558 string-literal (optionally enclosed in braces). */
5559 if (TREE_CODE (type
) == ARRAY_TYPE
5560 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5562 tree str_init
= init
;
5564 /* Strip one level of braces if and only if they enclose a single
5565 element (as allowed by [dcl.init.string]). */
5566 if (!first_initializer_p
5567 && TREE_CODE (str_init
) == CONSTRUCTOR
5568 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5570 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5573 /* If it's a string literal, then it's the initializer for the array
5574 as a whole. Otherwise, continue with normal initialization for
5575 array types (one value per array element). */
5576 if (TREE_CODE (str_init
) == STRING_CST
)
5578 if (has_designator_problem (d
, complain
))
5579 return error_mark_node
;
5585 /* The following cases are about aggregates. If we are not within a full
5586 initializer already, and there is not a CONSTRUCTOR, it means that there
5587 is a missing set of braces (that is, we are processing the case for
5588 which reshape_init exists). */
5589 if (!first_initializer_p
)
5591 if (TREE_CODE (init
) == CONSTRUCTOR
)
5593 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5594 /* There is no need to reshape pointer-to-member function
5595 initializers, as they are always constructed correctly
5596 by the front end. */
5598 else if (COMPOUND_LITERAL_P (init
))
5599 /* For a nested compound literal, there is no need to reshape since
5600 brace elision is not allowed. Even if we decided to allow it,
5601 we should add a call to reshape_init in finish_compound_literal,
5602 before calling digest_init, so changing this code would still
5603 not be necessary. */
5604 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5608 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5609 return reshape_init (type
, init
, complain
);
5613 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5617 /* Dispatch to specialized routines. */
5618 if (CLASS_TYPE_P (type
))
5619 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5620 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5621 return reshape_init_array (type
, d
, complain
);
5622 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5623 return reshape_init_vector (type
, d
, complain
);
5628 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5629 brace-enclosed aggregate initializer.
5631 INIT is the CONSTRUCTOR containing the list of initializers describing
5632 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5633 It may not presently match the shape of the TYPE; for example:
5635 struct S { int a; int b; };
5636 struct S a[] = { 1, 2, 3, 4 };
5638 Here INIT will hold a vector of four elements, rather than a
5639 vector of two elements, each itself a vector of two elements. This
5640 routine transforms INIT from the former form into the latter. The
5641 revised CONSTRUCTOR node is returned. */
5644 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5646 vec
<constructor_elt
, va_gc
> *v
;
5650 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5652 v
= CONSTRUCTOR_ELTS (init
);
5654 /* An empty constructor does not need reshaping, and it is always a valid
5656 if (vec_safe_is_empty (v
))
5659 /* Recurse on this CONSTRUCTOR. */
5661 d
.end
= d
.cur
+ v
->length ();
5663 new_init
= reshape_init_r (type
, &d
, true, complain
);
5664 if (new_init
== error_mark_node
)
5665 return error_mark_node
;
5667 /* Make sure all the element of the constructor were used. Otherwise,
5668 issue an error about exceeding initializers. */
5671 if (complain
& tf_error
)
5672 error ("too many initializers for %qT", type
);
5674 return error_mark_node
;
5680 /* Verify array initializer. Returns true if errors have been reported. */
5683 check_array_initializer (tree decl
, tree type
, tree init
)
5685 tree element_type
= TREE_TYPE (type
);
5687 /* The array type itself need not be complete, because the
5688 initializer may tell us how many elements are in the array.
5689 But, the elements of the array must be complete. */
5690 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5693 error ("elements of array %q#D have incomplete type", decl
);
5695 error ("elements of array %q#T have incomplete type", type
);
5698 /* A compound literal can't have variable size. */
5700 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5701 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5703 error ("variable-sized compound literal");
5709 /* Subroutine of check_initializer; args are passed down from that function.
5710 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5713 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5716 gcc_assert (stmts_are_full_exprs_p ());
5717 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5720 /* Verify INIT (the initializer for DECL), and record the
5721 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5722 grok_reference_init.
5724 If the return value is non-NULL, it is an expression that must be
5725 evaluated dynamically to initialize DECL. */
5728 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5730 tree type
= TREE_TYPE (decl
);
5731 tree init_code
= NULL
;
5734 /* Things that are going to be initialized need to have complete
5736 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5738 if (DECL_HAS_VALUE_EXPR_P (decl
))
5740 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5741 it doesn't have storage to be initialized. */
5742 gcc_assert (init
== NULL_TREE
);
5746 if (type
== error_mark_node
)
5747 /* We will have already complained. */
5750 if (TREE_CODE (type
) == ARRAY_TYPE
)
5752 if (check_array_initializer (decl
, type
, init
))
5755 else if (!COMPLETE_TYPE_P (type
))
5757 error ("%q#D has incomplete type", decl
);
5758 TREE_TYPE (decl
) = error_mark_node
;
5762 /* There is no way to make a variable-sized class type in GNU C++. */
5763 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5765 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5767 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5768 if (SCALAR_TYPE_P (type
))
5772 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5773 init
= build_zero_init (type
, NULL_TREE
, false);
5775 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5777 error ("scalar object %qD requires one element in initializer",
5779 TREE_TYPE (decl
) = error_mark_node
;
5785 if (TREE_CODE (decl
) == CONST_DECL
)
5787 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5789 DECL_INITIAL (decl
) = init
;
5791 gcc_assert (init
!= NULL_TREE
);
5794 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5796 else if (init
|| type_build_ctor_call (type
)
5797 || TREE_CODE (type
) == REFERENCE_TYPE
)
5799 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5801 init
= grok_reference_init (decl
, type
, init
, flags
);
5802 flags
|= LOOKUP_ALREADY_DIGESTED
;
5805 check_for_uninitialized_const_var (decl
);
5806 /* Do not reshape constructors of vectors (they don't need to be
5808 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5810 if (is_std_init_list (type
))
5812 init
= perform_implicit_conversion (type
, init
,
5813 tf_warning_or_error
);
5814 flags
|= LOOKUP_ALREADY_DIGESTED
;
5816 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5818 /* Don't reshape if the class has constructors. */
5819 if (cxx_dialect
== cxx98
)
5820 error ("in C++98 %qD must be initialized by constructor, "
5824 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5826 error ("opaque vector types cannot be initialized");
5827 init
= error_mark_node
;
5831 init
= reshape_init (type
, init
, tf_warning_or_error
);
5832 flags
|= LOOKUP_NO_NARROWING
;
5835 else if (TREE_CODE (init
) == TREE_LIST
5836 && TREE_TYPE (init
) != unknown_type_node
5837 && !MAYBE_CLASS_TYPE_P (type
))
5839 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5841 /* We get here with code like `int a (2);' */
5842 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5843 tf_warning_or_error
);
5846 /* If DECL has an array type without a specific bound, deduce the
5847 array size from the initializer. */
5848 maybe_deduce_size_from_array_init (decl
, init
);
5849 type
= TREE_TYPE (decl
);
5850 if (type
== error_mark_node
)
5853 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5854 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5855 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5856 && CP_AGGREGATE_TYPE_P (type
)
5857 && (CLASS_TYPE_P (type
)
5858 || !TYPE_NEEDS_CONSTRUCTING (type
)
5859 || type_has_extended_temps (type
))))
5861 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5863 /* A constructor call is a non-trivial initializer even if
5864 it isn't explicitly written. */
5865 if (TREE_SIDE_EFFECTS (init_code
))
5866 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5868 /* If this is a constexpr initializer, expand_default_init will
5869 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5870 case, pull the initializer back out and pass it down into
5871 store_init_value. */
5872 while (TREE_CODE (init_code
) == EXPR_STMT
5873 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5874 init_code
= TREE_OPERAND (init_code
, 0);
5875 if (TREE_CODE (init_code
) == INIT_EXPR
)
5877 init
= TREE_OPERAND (init_code
, 1);
5878 init_code
= NULL_TREE
;
5879 /* Don't call digest_init; it's unnecessary and will complain
5880 about aggregate initialization of non-aggregate classes. */
5881 flags
|= LOOKUP_ALREADY_DIGESTED
;
5883 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5885 /* Declared constexpr, but no suitable initializer; massage
5886 init appropriately so we can pass it into store_init_value
5888 if (CLASS_TYPE_P (type
)
5889 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5891 init
= build_functional_cast (type
, init
, tf_none
);
5892 if (TREE_CODE (init
) == TARGET_EXPR
)
5893 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5895 init_code
= NULL_TREE
;
5901 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5903 /* In aggregate initialization of a variable, each element
5904 initialization is a full-expression because there is no
5905 enclosing expression. */
5906 gcc_assert (stmts_are_full_exprs_p ());
5908 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5910 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5911 && DECL_INITIAL (decl
)
5912 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5913 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5914 warning (0, "array %qD initialized by parenthesized string literal %qE",
5915 decl
, DECL_INITIAL (decl
));
5921 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5922 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5923 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5924 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5927 check_for_uninitialized_const_var (decl
);
5930 if (init
&& init
!= error_mark_node
)
5931 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5935 /* We might have set these in cp_finish_decl. */
5936 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
5937 TREE_CONSTANT (decl
) = false;
5940 if (init_code
&& DECL_IN_AGGR_P (decl
))
5942 static int explained
= 0;
5944 if (cxx_dialect
< cxx11
)
5945 error ("initializer invalid for static member with constructor");
5947 error ("non-constant in-class initialization invalid for static "
5948 "member %qD", decl
);
5951 inform (input_location
,
5952 "(an out of class initialization is required)");
5961 /* If DECL is not a local variable, give it RTL. */
5964 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5966 int toplev
= toplevel_bindings_p ();
5968 const char *filename
;
5970 /* Set the DECL_ASSEMBLER_NAME for the object. */
5973 /* The `register' keyword, when used together with an
5974 asm-specification, indicates that the variable should be
5975 placed in a particular register. */
5976 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5978 set_user_assembler_name (decl
, asmspec
);
5979 DECL_HARD_REGISTER (decl
) = 1;
5983 if (TREE_CODE (decl
) == FUNCTION_DECL
5984 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5985 set_builtin_user_assembler_name (decl
, asmspec
);
5986 set_user_assembler_name (decl
, asmspec
);
5990 /* Handle non-variables up front. */
5993 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5997 /* If we see a class member here, it should be a static data
5999 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6001 gcc_assert (TREE_STATIC (decl
));
6002 /* An in-class declaration of a static data member should be
6003 external; it is only a declaration, and not a definition. */
6004 if (init
== NULL_TREE
)
6005 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6008 /* We don't create any RTL for local variables. */
6009 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6012 /* We defer emission of local statics until the corresponding
6013 DECL_EXPR is expanded. */
6014 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6016 /* We try to defer namespace-scope static constants so that they are
6017 not emitted into the object file unnecessarily. */
6018 filename
= LOCATION_FILE (input_location
);
6019 if (!DECL_VIRTUAL_P (decl
)
6020 && TREE_READONLY (decl
)
6021 && DECL_INITIAL (decl
) != NULL_TREE
6022 && DECL_INITIAL (decl
) != error_mark_node
6024 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
6026 && !TREE_PUBLIC (decl
))
6028 /* Fool with the linkage of static consts according to #pragma
6030 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
6031 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
6033 TREE_PUBLIC (decl
) = 1;
6034 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
6039 /* Likewise for template instantiations. */
6040 else if (DECL_LANG_SPECIFIC (decl
)
6041 && DECL_IMPLICIT_INSTANTIATION (decl
))
6044 /* If we're not deferring, go ahead and assemble the variable. */
6046 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6049 /* walk_tree helper for wrap_temporary_cleanups, below. */
6052 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6054 /* Stop at types or full-expression boundaries. */
6055 if (TYPE_P (*stmt_p
)
6056 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6062 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6064 tree guard
= (tree
)data
;
6065 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6067 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6068 /* Tell honor_protect_cleanup_actions to handle this as a separate
6070 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6072 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6078 /* We're initializing a local variable which has a cleanup GUARD. If there
6079 are any temporaries used in the initializer INIT of this variable, we
6080 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6081 variable will be cleaned up properly if one of them throws.
6083 Unfortunately, there's no way to express this properly in terms of
6084 nesting, as the regions for the temporaries overlap the region for the
6085 variable itself; if there are two temporaries, the variable needs to be
6086 the first thing destroyed if either of them throws. However, we only
6087 want to run the variable's cleanup if it actually got constructed. So
6088 we need to guard the temporary cleanups with the variable's cleanup if
6089 they are run on the normal path, but not if they are run on the
6090 exceptional path. We implement this by telling
6091 honor_protect_cleanup_actions to strip the variable cleanup from the
6092 exceptional path. */
6095 wrap_temporary_cleanups (tree init
, tree guard
)
6097 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6100 /* Generate code to initialize DECL (a local variable). */
6103 initialize_local_var (tree decl
, tree init
)
6105 tree type
= TREE_TYPE (decl
);
6109 gcc_assert (VAR_P (decl
)
6110 || TREE_CODE (decl
) == RESULT_DECL
);
6111 gcc_assert (!TREE_STATIC (decl
));
6113 if (DECL_SIZE (decl
) == NULL_TREE
)
6115 /* If we used it already as memory, it must stay in memory. */
6116 DECL_INITIAL (decl
) = NULL_TREE
;
6117 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6121 if (type
== error_mark_node
)
6124 /* Compute and store the initial value. */
6125 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6126 if (TREE_USED (type
))
6127 DECL_READ_P (decl
) = 1;
6129 /* Generate a cleanup, if necessary. */
6130 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6132 /* Perform the initialization. */
6135 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6136 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6137 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6139 /* Stick simple initializers in DECL_INITIAL so that
6140 -Wno-init-self works (c++/34772). */
6141 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6142 DECL_INITIAL (decl
) = rinit
;
6144 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6148 warning_at (DECL_SOURCE_LOCATION (decl
),
6150 "reference %qD is initialized with itself", decl
);
6155 int saved_stmts_are_full_exprs_p
;
6157 /* If we're only initializing a single object, guard the
6158 destructors of any temporaries used in its initializer with
6159 its destructor. This isn't right for arrays because each
6160 element initialization is a full-expression. */
6161 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6162 wrap_temporary_cleanups (init
, cleanup
);
6164 gcc_assert (building_stmt_list_p ());
6165 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6166 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6167 finish_expr_stmt (init
);
6168 current_stmt_tree ()->stmts_are_full_exprs_p
=
6169 saved_stmts_are_full_exprs_p
;
6173 /* Set this to 0 so we can tell whether an aggregate which was
6174 initialized was ever used. Don't do this if it has a
6175 destructor, so we don't complain about the 'resource
6176 allocation is initialization' idiom. Now set
6177 attribute((unused)) on types so decls of that type will be
6178 marked used. (see TREE_USED, above.) */
6179 if (TYPE_NEEDS_CONSTRUCTING (type
)
6181 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6182 && DECL_NAME (decl
))
6183 TREE_USED (decl
) = 0;
6184 else if (already_used
)
6185 TREE_USED (decl
) = 1;
6188 finish_decl_cleanup (decl
, cleanup
);
6191 /* DECL is a VAR_DECL for a compiler-generated variable with static
6192 storage duration (like a virtual table) whose initializer is a
6193 compile-time constant. Initialize the variable and provide it to the
6197 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6200 gcc_assert (DECL_ARTIFICIAL (decl
));
6201 init
= build_constructor (TREE_TYPE (decl
), v
);
6202 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6203 DECL_INITIAL (decl
) = init
;
6204 DECL_INITIALIZED_P (decl
) = 1;
6205 determine_visibility (decl
);
6206 layout_var_decl (decl
);
6207 maybe_commonize_var (decl
);
6208 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6211 /* INIT is the initializer for a variable, as represented by the
6212 parser. Returns true iff INIT is type-dependent. */
6215 type_dependent_init_p (tree init
)
6217 if (TREE_CODE (init
) == TREE_LIST
)
6218 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6219 return any_type_dependent_elements_p (init
);
6220 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6221 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6223 vec
<constructor_elt
, va_gc
> *elts
;
6227 elts
= CONSTRUCTOR_ELTS (init
);
6228 nelts
= vec_safe_length (elts
);
6229 for (i
= 0; i
< nelts
; ++i
)
6230 if (type_dependent_init_p ((*elts
)[i
].value
))
6234 /* It must be a simple expression, e.g., int i = 3; */
6235 return type_dependent_expression_p (init
);
6240 /* INIT is the initializer for a variable, as represented by the
6241 parser. Returns true iff INIT is value-dependent. */
6244 value_dependent_init_p (tree init
)
6246 if (TREE_CODE (init
) == TREE_LIST
)
6247 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6248 return any_value_dependent_elements_p (init
);
6249 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6250 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6252 vec
<constructor_elt
, va_gc
> *elts
;
6256 elts
= CONSTRUCTOR_ELTS (init
);
6257 nelts
= vec_safe_length (elts
);
6258 for (i
= 0; i
< nelts
; ++i
)
6259 if (value_dependent_init_p ((*elts
)[i
].value
))
6263 /* It must be a simple expression, e.g., int i = 3; */
6264 return value_dependent_expression_p (init
);
6269 /* Finish processing of a declaration;
6270 install its line number and initial value.
6271 If the length of an array type is not known before,
6272 it must be determined now, from the initial value, or it is an error.
6274 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6275 true, then INIT is an integral constant expression.
6277 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6278 if the (init) syntax was used. */
6281 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6282 tree asmspec_tree
, int flags
)
6285 vec
<tree
, va_gc
> *cleanups
= NULL
;
6286 const char *asmspec
= NULL
;
6287 int was_readonly
= 0;
6288 bool var_definition_p
= false;
6291 if (decl
== error_mark_node
)
6296 error ("assignment (not initialization) in declaration");
6300 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6301 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6302 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6304 type
= TREE_TYPE (decl
);
6305 if (type
== error_mark_node
)
6308 /* If a name was specified, get the string. */
6309 if (at_namespace_scope_p ())
6310 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6311 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6312 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6314 if (current_class_type
6315 && CP_DECL_CONTEXT (decl
) == current_class_type
6316 && TYPE_BEING_DEFINED (current_class_type
)
6317 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6318 && (DECL_INITIAL (decl
) || init
))
6319 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6321 if (TREE_CODE (decl
) != FUNCTION_DECL
6322 && (auto_node
= type_uses_auto (type
)))
6325 if (init
== NULL_TREE
)
6327 if (DECL_LANG_SPECIFIC (decl
)
6328 && DECL_TEMPLATE_INSTANTIATION (decl
)
6329 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6331 /* init is null because we're deferring instantiating the
6332 initializer until we need it. Well, we need it now. */
6333 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6337 error ("declaration of %q#D has no initializer", decl
);
6338 TREE_TYPE (decl
) = error_mark_node
;
6342 if (TREE_CODE (d_init
) == TREE_LIST
)
6343 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6344 tf_warning_or_error
);
6345 d_init
= resolve_nondeduced_context (d_init
);
6346 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6348 if (type
== error_mark_node
)
6350 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6353 if (!ensure_literal_type_for_constexpr_object (decl
))
6354 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6357 && DECL_CLASS_SCOPE_P (decl
)
6358 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6359 check_static_variable_definition (decl
, type
);
6361 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6364 if (init
== ridpointers
[(int)RID_DELETE
])
6366 /* FIXME check this is 1st decl. */
6367 DECL_DELETED_FN (decl
) = 1;
6368 DECL_DECLARED_INLINE_P (decl
) = 1;
6369 DECL_INITIAL (decl
) = error_mark_node
;
6370 FOR_EACH_CLONE (clone
, decl
)
6372 DECL_DELETED_FN (clone
) = 1;
6373 DECL_DECLARED_INLINE_P (clone
) = 1;
6374 DECL_INITIAL (clone
) = error_mark_node
;
6378 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6380 if (defaultable_fn_check (decl
))
6381 DECL_DEFAULTED_FN (decl
) = 1;
6383 DECL_INITIAL (decl
) = NULL_TREE
;
6387 if (init
&& VAR_P (decl
))
6389 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6390 /* If DECL is a reference, then we want to know whether init is a
6391 reference constant; init_const_expr_p as passed tells us whether
6392 it's an rvalue constant. */
6393 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6394 init_const_expr_p
= potential_constant_expression (init
);
6395 if (init_const_expr_p
)
6397 /* Set these flags now for templates. We'll update the flags in
6398 store_init_value for instantiations. */
6399 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6400 if (decl_maybe_constant_var_p (decl
))
6401 TREE_CONSTANT (decl
) = 1;
6405 if (processing_template_decl
)
6407 bool type_dependent_p
;
6409 /* Add this declaration to the statement-tree. */
6410 if (at_function_scope_p ())
6411 add_decl_expr (decl
);
6413 type_dependent_p
= dependent_type_p (type
);
6415 if (check_for_bare_parameter_packs (init
))
6418 DECL_INITIAL (decl
) = NULL_TREE
;
6421 /* Generally, initializers in templates are expanded when the
6422 template is instantiated. But, if DECL is a variable constant
6423 then it can be used in future constant expressions, so its value
6424 must be available. */
6426 if (!VAR_P (decl
) || dependent_type_p (type
))
6427 /* We can't do anything if the decl has dependent type. */;
6429 && init_const_expr_p
6430 && !type_dependent_p
6431 && TREE_CODE (type
) != REFERENCE_TYPE
6432 && decl_maybe_constant_var_p (decl
)
6433 && !type_dependent_init_p (init
)
6434 && !value_dependent_init_p (init
))
6436 /* This variable seems to be a non-dependent constant, so process
6437 its initializer. If check_initializer returns non-null the
6438 initialization wasn't constant after all. */
6440 cleanups
= make_tree_vector ();
6441 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6442 if (init_code
== NULL_TREE
)
6444 release_tree_vector (cleanups
);
6446 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6448 /* Deduce array size even if the initializer is dependent. */
6449 maybe_deduce_size_from_array_init (decl
, init
);
6450 /* And complain about multiple initializers. */
6451 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6452 && !MAYBE_CLASS_TYPE_P (type
))
6453 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6454 tf_warning_or_error
);
6458 DECL_INITIAL (decl
) = init
;
6462 /* Just store non-static data member initializers for later. */
6463 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6464 DECL_INITIAL (decl
) = init
;
6466 /* Take care of TYPE_DECLs up front. */
6467 if (TREE_CODE (decl
) == TYPE_DECL
)
6469 if (type
!= error_mark_node
6470 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6472 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6473 warning (0, "shadowing previous type declaration of %q#D", decl
);
6474 set_identifier_type_value (DECL_NAME (decl
), decl
);
6477 /* If we have installed this as the canonical typedef for this
6478 type, and that type has not been defined yet, delay emitting
6479 the debug information for it, as we will emit it later. */
6480 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6481 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6482 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6484 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6489 /* A reference will be modified here, as it is initialized. */
6490 if (! DECL_EXTERNAL (decl
)
6491 && TREE_READONLY (decl
)
6492 && TREE_CODE (type
) == REFERENCE_TYPE
)
6495 TREE_READONLY (decl
) = 0;
6500 /* If this is a local variable that will need a mangled name,
6501 register it now. We must do this before processing the
6502 initializer for the variable, since the initialization might
6503 require a guard variable, and since the mangled name of the
6504 guard variable will depend on the mangled name of this
6506 if (DECL_FUNCTION_SCOPE_P (decl
)
6507 && TREE_STATIC (decl
)
6508 && !DECL_ARTIFICIAL (decl
))
6510 push_local_name (decl
);
6511 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6512 || DECL_DESTRUCTOR_P (current_function_decl
))
6513 /* Normally local_decls is populated during GIMPLE lowering,
6514 but [cd]tors are never actually compiled directly. We need
6515 to put statics on the list so we can deal with the label
6516 address extension. FIXME. */
6517 add_local_decl (cfun
, decl
);
6520 /* Convert the initializer to the type of DECL, if we have not
6521 already initialized DECL. */
6522 if (!DECL_INITIALIZED_P (decl
)
6523 /* If !DECL_EXTERNAL then DECL is being defined. In the
6524 case of a static data member initialized inside the
6525 class-specifier, there can be an initializer even if DECL
6526 is *not* defined. */
6527 && (!DECL_EXTERNAL (decl
) || init
))
6529 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6532 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6533 /* Allow libjava/prims.cc define primitive classes. */
6534 if (init
!= NULL_TREE
6535 || jclass
== NULL_TREE
6536 || TREE_CODE (jclass
) != TYPE_DECL
6537 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6538 || !same_type_ignoring_top_level_qualifiers_p
6539 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6540 error ("Java object %qD not allocated with %<new%>", decl
);
6543 cleanups
= make_tree_vector ();
6544 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6550 The memory occupied by any object of static storage
6551 duration is zero-initialized at program startup before
6552 any other initialization takes place.
6554 We cannot create an appropriate initializer until after
6555 the type of DECL is finalized. If DECL_INITIAL is set,
6556 then the DECL is statically initialized, and any
6557 necessary zero-initialization has already been performed. */
6558 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6559 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6560 /*nelts=*/NULL_TREE
,
6561 /*static_storage_p=*/true);
6562 /* Remember that the initialization for this variable has
6564 DECL_INITIALIZED_P (decl
) = 1;
6565 /* This declaration is the definition of this variable,
6566 unless we are initializing a static data member within
6567 the class specifier. */
6568 if (!DECL_EXTERNAL (decl
))
6569 var_definition_p
= true;
6571 /* If the variable has an array type, lay out the type, even if
6572 there is no initializer. It is valid to index through the
6573 array, and we must get TYPE_ALIGN set correctly on the array
6575 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6578 if (TREE_STATIC (decl
)
6579 && !at_function_scope_p ()
6580 && current_function_decl
== NULL
)
6581 /* So decl is a global variable or a static member of a
6582 non local class. Record the types it uses
6583 so that we can decide later to emit debug info for them. */
6584 record_types_used_by_current_var_decl (decl
);
6586 else if (TREE_CODE (decl
) == FIELD_DECL
6587 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6588 error ("non-static data member %qD has Java class type", decl
);
6590 /* Add this declaration to the statement-tree. This needs to happen
6591 after the call to check_initializer so that the DECL_EXPR for a
6592 reference temp is added before the DECL_EXPR for the reference itself. */
6593 if (DECL_FUNCTION_SCOPE_P (decl
))
6595 /* If we're building a variable sized type, and we might be
6596 reachable other than via the top of the current binding
6597 level, then create a new BIND_EXPR so that we deallocate
6598 the object at the right time. */
6601 && !TREE_CONSTANT (DECL_SIZE (decl
))
6602 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6605 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6606 TREE_SIDE_EFFECTS (bind
) = 1;
6608 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6610 add_decl_expr (decl
);
6613 /* Let the middle end know about variables and functions -- but not
6614 static data members in uninstantiated class templates. */
6615 if (VAR_OR_FUNCTION_DECL_P (decl
))
6619 layout_var_decl (decl
);
6620 maybe_commonize_var (decl
);
6623 /* This needs to happen after the linkage is set. */
6624 determine_visibility (decl
);
6626 if (var_definition_p
&& TREE_STATIC (decl
))
6628 /* If a TREE_READONLY variable needs initialization
6629 at runtime, it is no longer readonly and we need to
6630 avoid MEM_READONLY_P being set on RTL created for it. */
6633 if (TREE_READONLY (decl
))
6634 TREE_READONLY (decl
) = 0;
6637 else if (was_readonly
)
6638 TREE_READONLY (decl
) = 1;
6640 /* Likewise if it needs destruction. */
6641 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6642 TREE_READONLY (decl
) = 0;
6645 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6647 /* Check for abstractness of the type. Notice that there is no
6648 need to strip array types here since the check for those types
6649 is already done within create_array_type_for_decl. */
6650 abstract_virtuals_error (decl
, type
);
6652 if (TREE_TYPE (decl
) == error_mark_node
)
6653 /* No initialization required. */
6655 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6659 if (init
== ridpointers
[(int)RID_DEFAULT
])
6661 /* An out-of-class default definition is defined at
6662 the point where it is explicitly defaulted. */
6663 if (DECL_DELETED_FN (decl
))
6664 maybe_explain_implicit_delete (decl
);
6665 else if (DECL_INITIAL (decl
) == error_mark_node
)
6666 synthesize_method (decl
);
6669 error ("function %q#D is initialized like a variable", decl
);
6671 /* else no initialization required. */
6673 else if (DECL_EXTERNAL (decl
)
6674 && ! (DECL_LANG_SPECIFIC (decl
)
6675 && DECL_NOT_REALLY_EXTERN (decl
)))
6678 DECL_INITIAL (decl
) = init
;
6680 /* A variable definition. */
6681 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6682 /* Initialize the local variable. */
6683 initialize_local_var (decl
, init
);
6685 /* If a variable is defined, and then a subsequent
6686 definition with external linkage is encountered, we will
6687 get here twice for the same variable. We want to avoid
6688 calling expand_static_init more than once. For variables
6689 that are not static data members, we can call
6690 expand_static_init only when we actually process the
6691 initializer. It is not legal to redeclare a static data
6692 member, so this issue does not arise in that case. */
6693 else if (var_definition_p
&& TREE_STATIC (decl
))
6694 expand_static_init (decl
, init
);
6697 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6698 reference, insert it in the statement-tree now. */
6702 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6703 push_cleanup (decl
, t
, false);
6704 release_tree_vector (cleanups
);
6708 TREE_READONLY (decl
) = 1;
6710 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6713 /* Returns a declaration for a VAR_DECL as if:
6715 extern "C" TYPE NAME;
6717 had been seen. Used to create compiler-generated global
6721 declare_global_var (tree name
, tree type
)
6725 push_to_top_level ();
6726 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6727 TREE_PUBLIC (decl
) = 1;
6728 DECL_EXTERNAL (decl
) = 1;
6729 DECL_ARTIFICIAL (decl
) = 1;
6730 /* If the user has explicitly declared this variable (perhaps
6731 because the code we are compiling is part of a low-level runtime
6732 library), then it is possible that our declaration will be merged
6733 with theirs by pushdecl. */
6734 decl
= pushdecl (decl
);
6735 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6736 pop_from_top_level ();
6741 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6742 if "__cxa_atexit" is not being used) corresponding to the function
6743 to be called when the program exits. */
6746 get_atexit_fn_ptr_type (void)
6750 if (!atexit_fn_ptr_type_node
)
6753 if (flag_use_cxa_atexit
6754 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6755 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6756 arg_type
= ptr_type_node
;
6758 /* The parameter to "atexit" is "void (*)(void)". */
6759 arg_type
= NULL_TREE
;
6761 fn_type
= build_function_type_list (void_type_node
,
6762 arg_type
, NULL_TREE
);
6763 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6766 return atexit_fn_ptr_type_node
;
6769 /* Returns a pointer to the `atexit' function. Note that if
6770 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6771 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6774 get_atexit_node (void)
6780 bool use_aeabi_atexit
;
6785 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6787 /* The declaration for `__cxa_atexit' is:
6789 int __cxa_atexit (void (*)(void *), void *, void *)
6791 We build up the argument types and then the function type
6793 tree argtype0
, argtype1
, argtype2
;
6795 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6796 /* First, build the pointer-to-function type for the first
6798 fn_ptr_type
= get_atexit_fn_ptr_type ();
6799 /* Then, build the rest of the argument types. */
6800 argtype2
= ptr_type_node
;
6801 if (use_aeabi_atexit
)
6803 argtype1
= fn_ptr_type
;
6804 argtype0
= ptr_type_node
;
6808 argtype1
= ptr_type_node
;
6809 argtype0
= fn_ptr_type
;
6811 /* And the final __cxa_atexit type. */
6812 fn_type
= build_function_type_list (integer_type_node
,
6813 argtype0
, argtype1
, argtype2
,
6815 if (use_aeabi_atexit
)
6816 name
= "__aeabi_atexit";
6818 name
= "__cxa_atexit";
6822 /* The declaration for `atexit' is:
6824 int atexit (void (*)());
6826 We build up the argument types and then the function type
6828 fn_ptr_type
= get_atexit_fn_ptr_type ();
6829 /* Build the final atexit type. */
6830 fn_type
= build_function_type_list (integer_type_node
,
6831 fn_ptr_type
, NULL_TREE
);
6835 /* Now, build the function declaration. */
6836 push_lang_context (lang_name_c
);
6837 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6838 mark_used (atexit_fndecl
);
6839 pop_lang_context ();
6840 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6845 /* Like get_atexit_node, but for thread-local cleanups. */
6848 get_thread_atexit_node (void)
6850 /* The declaration for `__cxa_thread_atexit' is:
6852 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6853 tree fn_type
= build_function_type_list (integer_type_node
,
6854 get_atexit_fn_ptr_type (),
6855 ptr_type_node
, ptr_type_node
,
6858 /* Now, build the function declaration. */
6859 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6860 ECF_LEAF
| ECF_NOTHROW
);
6861 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6864 /* Returns the __dso_handle VAR_DECL. */
6867 get_dso_handle_node (void)
6869 if (dso_handle_node
)
6870 return dso_handle_node
;
6872 /* Declare the variable. */
6873 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6876 #ifdef HAVE_GAS_HIDDEN
6877 if (dso_handle_node
!= error_mark_node
)
6879 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6880 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6884 return dso_handle_node
;
6887 /* Begin a new function with internal linkage whose job will be simply
6888 to destroy some particular variable. */
6890 static GTY(()) int start_cleanup_cnt
;
6893 start_cleanup_fn (void)
6898 bool use_cxa_atexit
= flag_use_cxa_atexit
6899 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6901 push_to_top_level ();
6903 /* No need to mangle this. */
6904 push_lang_context (lang_name_c
);
6906 /* Build the name of the function. */
6907 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6908 /* Build the function declaration. */
6909 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6910 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6911 /* It's a function with internal linkage, generated by the
6913 TREE_PUBLIC (fndecl
) = 0;
6914 DECL_ARTIFICIAL (fndecl
) = 1;
6915 /* Make the function `inline' so that it is only emitted if it is
6916 actually needed. It is unlikely that it will be inlined, since
6917 it is only called via a function pointer, but we avoid unnecessary
6918 emissions this way. */
6919 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6920 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6921 /* Build the parameter. */
6926 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6927 DECL_CONTEXT (parmdecl
) = fndecl
;
6928 TREE_USED (parmdecl
) = 1;
6929 DECL_READ_P (parmdecl
) = 1;
6930 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6934 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6936 pop_lang_context ();
6938 return current_function_decl
;
6941 /* Finish the cleanup function begun by start_cleanup_fn. */
6944 end_cleanup_fn (void)
6946 expand_or_defer_fn (finish_function (0));
6948 pop_from_top_level ();
6951 /* Generate code to handle the destruction of DECL, an object with
6952 static storage duration. */
6955 register_dtor_fn (tree decl
)
6962 bool ob_parm
, dso_parm
, use_dtor
;
6963 tree arg0
, arg1
, arg2
;
6966 type
= TREE_TYPE (decl
);
6967 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6970 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6971 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6972 destructor to "__cxa_atexit"; we don't have to build a temporary
6973 function to do the cleanup. */
6974 dso_parm
= (flag_use_cxa_atexit
6975 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6976 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6977 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6982 /* Find the destructor. */
6983 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6984 gcc_assert (idx
>= 0);
6985 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6986 /* Make sure it is accessible. */
6987 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6988 tf_warning_or_error
);
6992 /* Call build_cleanup before we enter the anonymous function so
6993 that any access checks will be done relative to the current
6994 scope, rather than the scope of the anonymous function. */
6995 build_cleanup (decl
);
6997 /* Now start the function. */
6998 cleanup
= start_cleanup_fn ();
7000 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7001 to the original function, rather than the anonymous one. That
7002 will make the back end think that nested functions are in use,
7003 which causes confusion. */
7004 push_deferring_access_checks (dk_no_check
);
7005 fcall
= build_cleanup (decl
);
7006 pop_deferring_access_checks ();
7008 /* Create the body of the anonymous function. */
7009 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7010 finish_expr_stmt (fcall
);
7011 finish_compound_stmt (compound_stmt
);
7015 /* Call atexit with the cleanup function. */
7016 mark_used (cleanup
);
7017 cleanup
= build_address (cleanup
);
7019 if (DECL_THREAD_LOCAL_P (decl
))
7020 atex_node
= get_thread_atexit_node ();
7022 atex_node
= get_atexit_node ();
7026 /* We must convert CLEANUP to the type that "__cxa_atexit"
7028 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7029 /* "__cxa_atexit" will pass the address of DECL to the
7030 cleanup function. */
7032 addr
= build_address (decl
);
7033 /* The declared type of the parameter to "__cxa_atexit" is
7034 "void *". For plain "T*", we could just let the
7035 machinery in cp_build_function_call convert it -- but if the
7036 type is "cv-qualified T *", then we need to convert it
7037 before passing it in, to avoid spurious errors. */
7038 addr
= build_nop (ptr_type_node
, addr
);
7041 /* Since the cleanup functions we build ignore the address
7042 they're given, there's no reason to pass the actual address
7043 in, and, in general, it's cheaper to pass NULL than any
7045 addr
= null_pointer_node
;
7048 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7049 tf_warning_or_error
);
7051 /* Just pass NULL to the dso handle parm if we don't actually
7052 have a DSO handle on this target. */
7053 arg2
= null_pointer_node
;
7059 if (!DECL_THREAD_LOCAL_P (decl
)
7060 && targetm
.cxx
.use_aeabi_atexit ())
7076 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7077 arg0
, arg1
, arg2
, NULL_TREE
);
7080 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7081 is its initializer. Generate code to handle the construction
7082 and destruction of DECL. */
7085 expand_static_init (tree decl
, tree init
)
7087 gcc_assert (VAR_P (decl
));
7088 gcc_assert (TREE_STATIC (decl
));
7090 /* Some variables require no dynamic initialization. */
7092 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7094 /* Make sure the destructor is callable. */
7095 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7099 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7100 && !DECL_FUNCTION_SCOPE_P (decl
))
7103 error ("non-local variable %qD declared %<__thread%> "
7104 "needs dynamic initialization", decl
);
7106 error ("non-local variable %qD declared %<__thread%> "
7107 "has a non-trivial destructor", decl
);
7108 static bool informed
;
7111 inform (DECL_SOURCE_LOCATION (decl
),
7112 "C++11 %<thread_local%> allows dynamic initialization "
7119 if (DECL_FUNCTION_SCOPE_P (decl
))
7121 /* Emit code to perform this initialization but once. */
7122 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7123 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7124 tree guard
, guard_addr
;
7126 /* We don't need thread-safety code for thread-local vars. */
7127 bool thread_guard
= (flag_threadsafe_statics
7128 && !DECL_THREAD_LOCAL_P (decl
));
7130 /* Emit code to perform this initialization but once. This code
7133 static <type> guard;
7134 if (!guard.first_byte) {
7135 if (__cxa_guard_acquire (&guard)) {
7138 // Do initialization.
7139 flag = true; __cxa_guard_release (&guard);
7140 // Register variable for destruction at end of program.
7142 if (!flag) __cxa_guard_abort (&guard);
7146 Note that the `flag' variable is only set to 1 *after* the
7147 initialization is complete. This ensures that an exception,
7148 thrown during the construction, will cause the variable to
7149 reinitialized when we pass through this code again, as per:
7153 If the initialization exits by throwing an exception, the
7154 initialization is not complete, so it will be tried again
7155 the next time control enters the declaration.
7157 This process should be thread-safe, too; multiple threads
7158 should not be able to initialize the variable more than
7161 /* Create the guard variable. */
7162 guard
= get_guard (decl
);
7164 /* This optimization isn't safe on targets with relaxed memory
7165 consistency. On such targets we force synchronization in
7166 __cxa_guard_acquire. */
7167 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7169 /* Begin the conditional initialization. */
7170 if_stmt
= begin_if_stmt ();
7171 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7172 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7177 tree vfntype
= NULL_TREE
;
7178 tree acquire_name
, release_name
, abort_name
;
7179 tree acquire_fn
, release_fn
, abort_fn
;
7180 guard_addr
= build_address (guard
);
7182 acquire_name
= get_identifier ("__cxa_guard_acquire");
7183 release_name
= get_identifier ("__cxa_guard_release");
7184 abort_name
= get_identifier ("__cxa_guard_abort");
7185 acquire_fn
= identifier_global_value (acquire_name
);
7186 release_fn
= identifier_global_value (release_name
);
7187 abort_fn
= identifier_global_value (abort_name
);
7189 acquire_fn
= push_library_fn
7190 (acquire_name
, build_function_type_list (integer_type_node
,
7191 TREE_TYPE (guard_addr
),
7193 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7194 if (!release_fn
|| !abort_fn
)
7195 vfntype
= build_function_type_list (void_type_node
,
7196 TREE_TYPE (guard_addr
),
7199 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7200 ECF_NOTHROW
| ECF_LEAF
);
7202 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7203 ECF_NOTHROW
| ECF_LEAF
);
7205 inner_if_stmt
= begin_if_stmt ();
7206 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7209 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7210 begin
= get_target_expr (boolean_false_node
);
7211 flag
= TARGET_EXPR_SLOT (begin
);
7213 TARGET_EXPR_CLEANUP (begin
)
7214 = build3 (COND_EXPR
, void_type_node
, flag
,
7216 build_call_n (abort_fn
, 1, guard_addr
));
7217 CLEANUP_EH_ONLY (begin
) = 1;
7219 /* Do the initialization itself. */
7220 init
= add_stmt_to_compound (begin
, init
);
7221 init
= add_stmt_to_compound
7222 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7223 init
= add_stmt_to_compound
7224 (init
, build_call_n (release_fn
, 1, guard_addr
));
7227 init
= add_stmt_to_compound (init
, set_guard (guard
));
7229 /* Use atexit to register a function for destroying this static
7231 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7233 finish_expr_stmt (init
);
7237 finish_compound_stmt (inner_then_clause
);
7238 finish_then_clause (inner_if_stmt
);
7239 finish_if_stmt (inner_if_stmt
);
7242 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7244 finish_compound_stmt (then_clause
);
7245 finish_then_clause (if_stmt
);
7246 finish_if_stmt (if_stmt
);
7249 else if (DECL_THREAD_LOCAL_P (decl
))
7250 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7252 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7256 /* Make TYPE a complete type based on INITIAL_VALUE.
7257 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7258 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7259 3 if the initializer list is empty (in pedantic mode). */
7262 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7265 tree type
, elt_type
;
7267 /* Don't get confused by a CONSTRUCTOR for some other type. */
7268 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7269 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7274 unsigned HOST_WIDE_INT i
;
7277 /* An array of character type can be initialized from a
7278 brace-enclosed string constant.
7280 FIXME: this code is duplicated from reshape_init. Probably
7281 we should just call reshape_init here? */
7282 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7283 && TREE_CODE (initial_value
) == CONSTRUCTOR
7284 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7286 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7287 tree value
= (*v
)[0].value
;
7289 if (TREE_CODE (value
) == STRING_CST
7290 && v
->length () == 1)
7291 initial_value
= value
;
7294 /* If any of the elements are parameter packs, we can't actually
7295 complete this type now because the array size is dependent. */
7296 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7298 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7301 if (PACK_EXPANSION_P (value
))
7307 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7309 /* We can create the array before the element type is complete, which
7310 means that we didn't have these two bits set in the original type
7311 either. In completing the type, we are expected to propagate these
7312 bits. See also complete_type which does the same thing for arrays
7315 if (TYPE_DOMAIN (type
))
7317 elt_type
= TREE_TYPE (type
);
7318 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7319 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7320 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7326 /* As above, but either give an error or reject zero-size arrays, depending
7330 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7331 bool do_default
, tsubst_flags_t complain
)
7334 bool sfinae
= !(complain
& tf_error
);
7335 /* In SFINAE context we can't be lenient about zero-size arrays. */
7338 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7344 /* Not an error. */;
7345 else if (failure
== 1)
7346 error ("initializer fails to determine size of %qT", *ptype
);
7347 else if (failure
== 2)
7350 error ("array size missing in %qT", *ptype
);
7352 else if (failure
== 3)
7353 error ("zero-size array %qT", *ptype
);
7354 *ptype
= error_mark_node
;
7359 /* Return zero if something is declared to be a member of type
7360 CTYPE when in the context of CUR_TYPE. STRING is the error
7361 message to print in that case. Otherwise, quietly return 1. */
7364 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7366 if (ctype
&& ctype
!= cur_type
)
7368 if (flags
== DTOR_FLAG
)
7369 error ("destructor for alien class %qT cannot be a member", ctype
);
7371 error ("constructor for alien class %qT cannot be a member", ctype
);
7377 /* Subroutine of `grokdeclarator'. */
7379 /* Generate errors possibly applicable for a given set of specifiers.
7380 This is for ARM $7.1.2. */
7383 bad_specifiers (tree object
,
7384 enum bad_spec_place type
,
7395 error ("%qD declared as a %<virtual%> variable", object
);
7397 error ("%qD declared as an %<inline%> variable", object
);
7399 error ("%<const%> and %<volatile%> function specifiers on "
7400 "%qD invalid in variable declaration", object
);
7404 error ("%qD declared as a %<virtual%> parameter", object
);
7406 error ("%qD declared as an %<inline%> parameter", object
);
7408 error ("%<const%> and %<volatile%> function specifiers on "
7409 "%qD invalid in parameter declaration", object
);
7413 error ("%qD declared as a %<virtual%> type", object
);
7415 error ("%qD declared as an %<inline%> type", object
);
7417 error ("%<const%> and %<volatile%> function specifiers on "
7418 "%qD invalid in type declaration", object
);
7422 error ("%qD declared as a %<virtual%> field", object
);
7424 error ("%qD declared as an %<inline%> field", object
);
7426 error ("%<const%> and %<volatile%> function specifiers on "
7427 "%qD invalid in field declaration", object
);
7433 error ("%q+D declared as a friend", object
);
7435 && (TREE_CODE (object
) == TYPE_DECL
7436 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7437 && !TYPE_REFFN_P (TREE_TYPE (object
))
7438 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7439 error ("%q+D declared with an exception specification", object
);
7442 /* DECL is a member function or static data member and is presently
7443 being defined. Check that the definition is taking place in a
7447 check_class_member_definition_namespace (tree decl
)
7449 /* These checks only apply to member functions and static data
7451 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7452 /* We check for problems with specializations in pt.c in
7453 check_specialization_namespace, where we can issue better
7455 if (processing_specialization
)
7457 /* There are no restrictions on the placement of
7458 explicit instantiations. */
7459 if (processing_explicit_instantiation
)
7463 A member function definition that appears outside of the
7464 class definition shall appear in a namespace scope enclosing
7465 the class definition.
7469 The definition for a static data member shall appear in a
7470 namespace scope enclosing the member's class definition. */
7471 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7472 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7473 decl
, DECL_CONTEXT (decl
));
7476 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7477 METHOD_TYPE for a non-static member function; QUALS are the
7478 cv-qualifiers that apply to the function. */
7481 build_this_parm (tree type
, cp_cv_quals quals
)
7486 cp_cv_quals this_quals
;
7488 if (CLASS_TYPE_P (type
))
7491 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7492 this_type
= build_pointer_type (this_type
);
7495 this_type
= type_of_this_parm (type
);
7496 /* The `this' parameter is implicitly `const'; it cannot be
7498 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7499 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7500 parm
= build_artificial_parm (this_identifier
, qual_type
);
7501 cp_apply_type_quals_to_decl (this_quals
, parm
);
7505 /* DECL is a static member function. Complain if it was declared
7506 with function-cv-quals. */
7509 check_static_quals (tree decl
, cp_cv_quals quals
)
7511 if (quals
!= TYPE_UNQUALIFIED
)
7512 error ("static member function %q#D declared with type qualifiers",
7516 /* Helper function. Replace the temporary this parameter injected
7517 during cp_finish_omp_declare_simd with the real this parameter. */
7520 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7522 tree this_parm
= (tree
) data
;
7523 if (TREE_CODE (*tp
) == PARM_DECL
7524 && DECL_NAME (*tp
) == this_identifier
7525 && *tp
!= this_parm
)
7527 else if (TYPE_P (*tp
))
7532 /* CTYPE is class type, or null if non-class.
7533 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7535 DECLARATOR is the function's name.
7536 PARMS is a chain of PARM_DECLs for the function.
7537 VIRTUALP is truthvalue of whether the function is virtual or not.
7538 FLAGS are to be passed through to `grokclassfn'.
7539 QUALS are qualifiers indicating whether the function is `const'
7541 RAISES is a list of exceptions that this function can raise.
7542 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7543 not look, and -1 if we should not call `grokclassfn' at all.
7545 SFK is the kind of special function (if any) for the new function.
7547 Returns `NULL_TREE' if something goes wrong, after issuing
7548 applicable error messages. */
7551 grokfndecl (tree ctype
,
7555 tree orig_declarator
,
7557 enum overload_flags flags
,
7559 cp_ref_qualifier rqual
,
7565 special_function_kind sfk
,
7570 location_t location
)
7573 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7577 type
= build_ref_qualified_type (type
, rqual
);
7579 type
= build_exception_variant (type
, raises
);
7581 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7583 /* If we have an explicit location, use it, otherwise use whatever
7584 build_lang_decl used (probably input_location). */
7585 if (location
!= UNKNOWN_LOCATION
)
7586 DECL_SOURCE_LOCATION (decl
) = location
;
7588 if (TREE_CODE (type
) == METHOD_TYPE
)
7591 parm
= build_this_parm (type
, quals
);
7592 DECL_CHAIN (parm
) = parms
;
7595 DECL_ARGUMENTS (decl
) = parms
;
7596 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7597 DECL_CONTEXT (t
) = decl
;
7598 /* Propagate volatile out from type to decl. */
7599 if (TYPE_VOLATILE (type
))
7600 TREE_THIS_VOLATILE (decl
) = 1;
7602 /* Setup decl according to sfk. */
7605 case sfk_constructor
:
7606 case sfk_copy_constructor
:
7607 case sfk_move_constructor
:
7608 DECL_CONSTRUCTOR_P (decl
) = 1;
7610 case sfk_destructor
:
7611 DECL_DESTRUCTOR_P (decl
) = 1;
7617 /* If pointers to member functions use the least significant bit to
7618 indicate whether a function is virtual, ensure a pointer
7619 to this function will have that bit clear. */
7620 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7621 && TREE_CODE (type
) == METHOD_TYPE
7622 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7623 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7626 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7630 ("defining explicit specialization %qD in friend declaration",
7634 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7635 tree args
= TREE_OPERAND (orig_declarator
, 1);
7637 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7639 /* Something like `template <class T> friend void f<T>()'. */
7640 error ("invalid use of template-id %qD in declaration "
7641 "of primary template",
7647 /* A friend declaration of the form friend void f<>(). Record
7648 the information in the TEMPLATE_ID_EXPR. */
7649 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7651 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7652 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7654 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7655 if (TREE_PURPOSE (t
)
7656 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7658 error ("default arguments are not allowed in declaration "
7659 "of friend template specialization %qD",
7665 error ("%<inline%> is not allowed in declaration of friend "
7666 "template specialization %qD",
7669 error ("%<constexpr%> is not allowed in declaration of friend "
7670 "template specialization %qD",
7677 /* If this decl has namespace scope, set that up. */
7679 set_decl_namespace (decl
, in_namespace
, friendp
);
7681 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7683 /* `main' and builtins have implicit 'C' linkage. */
7684 if ((MAIN_NAME_P (declarator
)
7685 || (IDENTIFIER_LENGTH (declarator
) > 10
7686 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7687 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7688 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7689 || (targetcm
.cxx_implicit_extern_c
7690 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7691 && current_lang_name
== lang_name_cplusplus
7692 && ctype
== NULL_TREE
7693 && DECL_FILE_SCOPE_P (decl
))
7694 SET_DECL_LANGUAGE (decl
, lang_c
);
7696 /* Should probably propagate const out from type to decl I bet (mrs). */
7699 DECL_STATIC_FUNCTION_P (decl
) = 1;
7700 DECL_CONTEXT (decl
) = ctype
;
7705 DECL_CONTEXT (decl
) = ctype
;
7707 check_class_member_definition_namespace (decl
);
7710 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7712 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7713 error ("cannot declare %<::main%> to be a template");
7715 error ("cannot declare %<::main%> to be inline");
7717 error ("cannot declare %<::main%> to be constexpr");
7719 error ("cannot declare %<::main%> to be static");
7724 /* Members of anonymous types and local classes have no linkage; make
7725 them internal. If a typedef is made later, this will be changed. */
7726 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7727 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7730 if (publicp
&& cxx_dialect
== cxx98
)
7732 /* [basic.link]: A name with no linkage (notably, the name of a class
7733 or enumeration declared in a local scope) shall not be used to
7734 declare an entity with linkage.
7736 DR 757 relaxes this restriction for C++0x. */
7737 no_linkage_error (decl
);
7740 TREE_PUBLIC (decl
) = publicp
;
7743 DECL_INTERFACE_KNOWN (decl
) = 1;
7744 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7747 /* If the declaration was declared inline, mark it as such. */
7750 DECL_DECLARED_INLINE_P (decl
) = 1;
7752 DECL_COMDAT (decl
) = 1;
7755 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7757 DECL_EXTERNAL (decl
) = 1;
7758 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7763 ? G_("static member function %qD cannot have cv-qualifier")
7764 : G_("non-member function %qD cannot have cv-qualifier"),
7766 quals
= TYPE_UNQUALIFIED
;
7772 ? G_("static member function %qD cannot have ref-qualifier")
7773 : G_("non-member function %qD cannot have ref-qualifier"),
7775 rqual
= REF_QUAL_NONE
;
7779 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7780 && !grok_op_properties (decl
, /*complain=*/true))
7782 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7784 bool long_long_unsigned_p
;
7786 const char *suffix
= NULL
;
7787 /* [over.literal]/6: Literal operators shall not have C linkage. */
7788 if (DECL_LANGUAGE (decl
) == lang_c
)
7790 error ("literal operator with C linkage");
7794 if (DECL_NAMESPACE_SCOPE_P (decl
))
7796 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7799 error ("%qD has invalid argument list", decl
);
7803 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7804 if (long_long_unsigned_p
)
7806 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7807 warning (0, "integer suffix %<%s%>"
7808 " shadowed by implementation", suffix
);
7810 else if (long_double_p
)
7812 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7813 warning (0, "floating point suffix %<%s%>"
7814 " shadowed by implementation", suffix
);
7819 error ("%qD must be a non-member function", decl
);
7825 /* Make the init_value nonzero so pushdecl knows this is not
7826 tentative. error_mark_node is replaced later with the BLOCK. */
7827 DECL_INITIAL (decl
) = error_mark_node
;
7829 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7830 TREE_NOTHROW (decl
) = 1;
7832 if (flag_openmp
|| flag_cilkplus
)
7834 /* Adjust "omp declare simd" attributes. */
7835 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7839 for (attr
= ods
; attr
;
7840 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7842 if (TREE_CODE (type
) == METHOD_TYPE
)
7843 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7844 DECL_ARGUMENTS (decl
), NULL
);
7845 if (TREE_VALUE (attr
) != NULL_TREE
)
7847 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7848 cl
= c_omp_declare_simd_clauses_to_numbers
7849 (DECL_ARGUMENTS (decl
), cl
);
7851 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7853 TREE_VALUE (attr
) = NULL_TREE
;
7859 /* Caller will do the rest of this. */
7863 if (ctype
!= NULL_TREE
)
7864 grokclassfn (ctype
, decl
, flags
);
7867 if (cxx_dialect
>= cxx11
7868 && DECL_DESTRUCTOR_P (decl
)
7869 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7870 && !processing_template_decl
)
7871 deduce_noexcept_on_destructor (decl
);
7873 decl
= check_explicit_specialization (orig_declarator
, decl
,
7876 4 * (friendp
!= 0));
7877 if (decl
== error_mark_node
)
7880 if (DECL_STATIC_FUNCTION_P (decl
))
7881 check_static_quals (decl
, quals
);
7885 cplus_decl_attributes (&decl
, *attrlist
, 0);
7886 *attrlist
= NULL_TREE
;
7889 /* Check main's type after attributes have been applied. */
7890 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7892 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7895 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7897 error ("%<::main%> must return %<int%>");
7898 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7899 TREE_TYPE (decl
) = newtype
;
7902 check_main_parameter_types (decl
);
7905 if (ctype
!= NULL_TREE
7906 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7909 tree old_decl
= check_classfn (ctype
, decl
,
7910 (processing_template_decl
7911 > template_class_depth (ctype
))
7912 ? current_template_parms
7915 if (old_decl
== error_mark_node
)
7923 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7924 /* Because grokfndecl is always supposed to return a
7925 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7926 here. We depend on our callers to figure out that its
7927 really a template that's being returned. */
7928 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7930 if (DECL_STATIC_FUNCTION_P (old_decl
)
7931 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7933 /* Remove the `this' parm added by grokclassfn. */
7934 revert_static_member_fn (decl
);
7935 check_static_quals (decl
, quals
);
7937 if (DECL_ARTIFICIAL (old_decl
))
7939 error ("definition of implicitly-declared %qD", old_decl
);
7942 else if (DECL_DEFAULTED_FN (old_decl
))
7944 error ("definition of explicitly-defaulted %q+D", decl
);
7945 error ("%q+#D explicitly defaulted here", old_decl
);
7949 /* Since we've smashed OLD_DECL to its
7950 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7951 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7952 decl
= DECL_TEMPLATE_RESULT (decl
);
7954 /* Attempt to merge the declarations. This can fail, in
7955 the case of some invalid specialization declarations. */
7956 pushed_scope
= push_scope (ctype
);
7957 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7959 pop_scope (pushed_scope
);
7962 error ("no %q#D member function declared in class %qT",
7966 if (ok
== error_mark_node
)
7972 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7975 if (ctype
== NULL_TREE
|| check
)
7979 DECL_VIRTUAL_P (decl
) = 1;
7984 /* decl is a FUNCTION_DECL.
7985 specifiers are the parsed virt-specifiers.
7987 Set flags to reflect the virt-specifiers.
7992 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7994 if (decl
== NULL_TREE
)
7996 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7997 DECL_OVERRIDE_P (decl
) = 1;
7998 if (specifiers
& VIRT_SPEC_FINAL
)
7999 DECL_FINAL_P (decl
) = 1;
8003 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8004 the linkage that DECL will receive in the object file. */
8007 set_linkage_for_static_data_member (tree decl
)
8009 /* A static data member always has static storage duration and
8010 external linkage. Note that static data members are forbidden in
8011 local classes -- the only situation in which a class has
8012 non-external linkage. */
8013 TREE_PUBLIC (decl
) = 1;
8014 TREE_STATIC (decl
) = 1;
8015 /* For non-template classes, static data members are always put
8016 out in exactly those files where they are defined, just as
8017 with ordinary namespace-scope variables. */
8018 if (!processing_template_decl
)
8019 DECL_INTERFACE_KNOWN (decl
) = 1;
8022 /* Create a VAR_DECL named NAME with the indicated TYPE.
8024 If SCOPE is non-NULL, it is the class type or namespace containing
8025 the variable. If SCOPE is NULL, the variable should is created in
8026 the innermost enclosing scope. */
8029 grokvardecl (tree type
,
8031 tree orig_declarator
,
8032 const cp_decl_specifier_seq
*declspecs
,
8039 tree explicit_scope
;
8041 gcc_assert (!name
|| identifier_p (name
));
8043 /* Compute the scope in which to place the variable, but remember
8044 whether or not that scope was explicitly specified by the user. */
8045 explicit_scope
= scope
;
8048 /* An explicit "extern" specifier indicates a namespace-scope
8050 if (declspecs
->storage_class
== sc_extern
)
8051 scope
= current_decl_namespace ();
8052 else if (!at_function_scope_p ())
8053 scope
= current_scope ();
8057 && (/* If the variable is a namespace-scope variable declared in a
8058 template, we need DECL_LANG_SPECIFIC. */
8059 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8060 /* Similarly for namespace-scope variables with language linkage
8062 || (TREE_CODE (scope
) == NAMESPACE_DECL
8063 && current_lang_name
!= lang_name_cplusplus
)
8064 /* Similarly for static data members. */
8066 /* Similarly for explicit specializations. */
8068 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8069 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8071 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8073 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8074 set_decl_namespace (decl
, explicit_scope
, 0);
8076 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8078 if (declspecs
->storage_class
== sc_extern
)
8080 DECL_THIS_EXTERN (decl
) = 1;
8081 DECL_EXTERNAL (decl
) = !initialized
;
8084 if (DECL_CLASS_SCOPE_P (decl
))
8086 set_linkage_for_static_data_member (decl
);
8087 /* This function is only called with out-of-class definitions. */
8088 DECL_EXTERNAL (decl
) = 0;
8089 check_class_member_definition_namespace (decl
);
8091 /* At top level, either `static' or no s.c. makes a definition
8092 (perhaps tentative), and absence of `static' makes it public. */
8093 else if (toplevel_bindings_p ())
8095 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8096 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8097 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8099 /* Not at top level, only `static' makes a static definition. */
8102 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8103 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8106 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8108 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8109 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8110 if (declspecs
->gnu_thread_keyword_p
)
8111 DECL_GNU_TLS_P (decl
) = true;
8114 /* If the type of the decl has no linkage, make sure that we'll
8115 notice that in mark_used. */
8116 if (cxx_dialect
> cxx98
8117 && decl_linkage (decl
) != lk_none
8118 && DECL_LANG_SPECIFIC (decl
) == NULL
8119 && !DECL_EXTERN_C_P (decl
)
8120 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8121 retrofit_lang_decl (decl
);
8123 if (TREE_PUBLIC (decl
))
8125 /* [basic.link]: A name with no linkage (notably, the name of a class
8126 or enumeration declared in a local scope) shall not be used to
8127 declare an entity with linkage.
8129 DR 757 relaxes this restriction for C++0x. */
8130 if (cxx_dialect
< cxx11
)
8131 no_linkage_error (decl
);
8134 DECL_INTERFACE_KNOWN (decl
) = 1;
8136 // Handle explicit specializations and instantiations of variable templates.
8137 if (orig_declarator
)
8138 decl
= check_explicit_specialization (orig_declarator
, decl
,
8141 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8144 /* Create and return a canonical pointer to member function type, for
8145 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8148 build_ptrmemfunc_type (tree type
)
8153 if (type
== error_mark_node
)
8156 /* If a canonical type already exists for this type, use it. We use
8157 this method instead of type_hash_canon, because it only does a
8158 simple equality check on the list of field members. */
8160 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8163 /* Make sure that we always have the unqualified pointer-to-member
8165 if (cp_cv_quals quals
= cp_type_quals (type
))
8167 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8168 return cp_build_qualified_type (unqual
, quals
);
8171 t
= make_node (RECORD_TYPE
);
8173 /* Let the front end know this is a pointer to member function. */
8174 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8176 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8179 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8181 DECL_CHAIN (field
) = fields
;
8184 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8186 /* Zap out the name so that the back end will give us the debugging
8187 information for this anonymous RECORD_TYPE. */
8188 TYPE_NAME (t
) = NULL_TREE
;
8190 /* Cache this pointer-to-member type so that we can find it again
8192 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8194 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8195 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8196 else if (TYPE_CANONICAL (type
) != type
)
8197 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8202 /* Create and return a pointer to data member type. */
8205 build_ptrmem_type (tree class_type
, tree member_type
)
8207 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8209 cp_cv_quals quals
= type_memfn_quals (member_type
);
8210 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8211 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8212 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8216 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8217 return build_offset_type (class_type
, member_type
);
8221 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8222 Check to see that the definition is valid. Issue appropriate error
8223 messages. Return 1 if the definition is particularly bad, or 0
8227 check_static_variable_definition (tree decl
, tree type
)
8229 /* Can't check yet if we don't know the type. */
8230 if (dependent_type_p (type
))
8232 /* If DECL is declared constexpr, we'll do the appropriate checks
8233 in check_initializer. */
8234 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8236 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8238 if (!COMPLETE_TYPE_P (type
))
8239 error ("in-class initialization of static data member %q#D of "
8240 "incomplete type", decl
);
8241 else if (literal_type_p (type
))
8242 permerror (input_location
,
8243 "%<constexpr%> needed for in-class initialization of "
8244 "static data member %q#D of non-integral type", decl
);
8246 error ("in-class initialization of static data member %q#D of "
8247 "non-literal type", decl
);
8251 /* Motion 10 at San Diego: If a static const integral data member is
8252 initialized with an integral constant expression, the initializer
8253 may appear either in the declaration (within the class), or in
8254 the definition, but not both. If it appears in the class, the
8255 member is a member constant. The file-scope definition is always
8257 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8259 error ("invalid in-class initialization of static data member "
8260 "of non-integral type %qT",
8264 else if (!CP_TYPE_CONST_P (type
))
8265 error ("ISO C++ forbids in-class initialization of non-const "
8266 "static member %qD",
8268 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8269 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8270 "%qD of non-integral type %qT", decl
, type
);
8275 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8276 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8277 expressions out into temporary variables so that walk_tree doesn't
8278 step into them (c++/15764). */
8281 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8283 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8284 tree expr
= *expr_p
;
8285 if (TREE_CODE (expr
) == SAVE_EXPR
)
8287 tree op
= TREE_OPERAND (expr
, 0);
8288 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8289 if (TREE_SIDE_EFFECTS (op
))
8290 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8293 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8298 /* Entry point for the above. */
8301 stabilize_vla_size (tree size
)
8303 hash_set
<tree
> pset
;
8304 /* Break out any function calls into temporary variables. */
8305 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8308 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8309 not inside of SAVE_EXPR and fold them. */
8312 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8314 tree expr
= *expr_p
;
8315 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8317 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8319 *(bool *)data
= true;
8320 if (SIZEOF_EXPR_TYPE_P (expr
))
8321 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8322 SIZEOF_EXPR
, false);
8323 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8324 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8327 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8329 if (expr
== error_mark_node
)
8330 expr
= size_one_node
;
8337 /* Given the SIZE (i.e., number of elements) in an array, compute an
8338 appropriate index type for the array. If non-NULL, NAME is the
8339 name of the thing being declared. */
8342 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8347 if (error_operand_p (size
))
8348 return error_mark_node
;
8350 if (!type_dependent_expression_p (size
))
8352 tree type
= TREE_TYPE (size
);
8354 mark_rvalue_use (size
);
8356 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8357 && TREE_SIDE_EFFECTS (size
))
8358 /* In C++98, we mark a non-constant array bound with a magic
8359 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8362 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8364 if (CLASS_TYPE_P (type
)
8365 && CLASSTYPE_LITERAL_P (type
))
8367 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8370 if (!(complain
& tf_error
))
8371 return error_mark_node
;
8373 error ("size of array %qD has non-integral type %qT",
8376 error ("size of array has non-integral type %qT", type
);
8377 size
= integer_one_node
;
8379 if (size
== error_mark_node
)
8380 return error_mark_node
;
8381 type
= TREE_TYPE (size
);
8384 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8385 size
= maybe_constant_value (size
);
8387 if (!TREE_CONSTANT (size
))
8391 if (error_operand_p (size
))
8392 return error_mark_node
;
8394 /* The array bound must be an integer type. */
8395 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8397 if (!(complain
& tf_error
))
8398 return error_mark_node
;
8400 error ("size of array %qD has non-integral type %qT", name
, type
);
8402 error ("size of array has non-integral type %qT", type
);
8403 size
= integer_one_node
;
8404 type
= TREE_TYPE (size
);
8408 /* A type is dependent if it is...an array type constructed from any
8409 dependent type or whose size is specified by a constant expression
8410 that is value-dependent. */
8411 /* We can only call value_dependent_expression_p on integral constant
8412 expressions; treat non-constant expressions as dependent, too. */
8413 if (processing_template_decl
8414 && (type_dependent_expression_p (size
)
8415 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8417 /* We cannot do any checking for a SIZE that isn't known to be
8418 constant. Just build the index type and mark that it requires
8419 structural equality checks. */
8420 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8421 size
, size_one_node
));
8422 TYPE_DEPENDENT_P (itype
) = 1;
8423 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8424 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8428 /* Normally, the array-bound will be a constant. */
8429 if (TREE_CODE (size
) == INTEGER_CST
)
8431 /* Check to see if the array bound overflowed. Make that an
8432 error, no matter how generous we're being. */
8433 constant_expression_error (size
);
8435 /* An array must have a positive number of elements. */
8436 if (tree_int_cst_lt (size
, integer_zero_node
))
8438 if (!(complain
& tf_error
))
8439 return error_mark_node
;
8441 error ("size of array %qD is negative", name
);
8443 error ("size of array is negative");
8444 size
= integer_one_node
;
8446 /* As an extension we allow zero-sized arrays. */
8447 else if (integer_zerop (size
))
8449 if (!(complain
& tf_error
))
8450 /* We must fail if performing argument deduction (as
8451 indicated by the state of complain), so that
8452 another substitution can be found. */
8453 return error_mark_node
;
8454 else if (in_system_header_at (input_location
))
8455 /* Allow them in system headers because glibc uses them. */;
8457 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8459 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8462 else if (TREE_CONSTANT (size
)
8463 /* We don't allow VLAs at non-function scopes, or during
8464 tentative template substitution. */
8465 || !at_function_scope_p ()
8466 || (cxx_dialect
< cxx14
&& !(complain
& tf_error
)))
8468 if (!(complain
& tf_error
))
8469 return error_mark_node
;
8470 /* `(int) &fn' is not a valid array bound. */
8472 error ("size of array %qD is not an integral constant-expression",
8475 error ("size of array is not an integral constant-expression");
8476 size
= integer_one_node
;
8478 else if (cxx_dialect
< cxx14
&& pedantic
&& warn_vla
!= 0)
8481 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8483 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8485 else if (warn_vla
> 0)
8489 "variable length array %qD is used", name
);
8492 "variable length array is used");
8495 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8496 /* A variable sized array. */
8497 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8500 HOST_WIDE_INT saved_processing_template_decl
;
8502 /* Compute the index of the largest element in the array. It is
8503 one less than the number of elements in the array. We save
8504 and restore PROCESSING_TEMPLATE_DECL so that computations in
8505 cp_build_binary_op will be appropriately folded. */
8506 saved_processing_template_decl
= processing_template_decl
;
8507 processing_template_decl
= 0;
8508 itype
= cp_build_binary_op (input_location
,
8510 cp_convert (ssizetype
, size
, complain
),
8511 cp_convert (ssizetype
, integer_one_node
,
8514 itype
= fold (itype
);
8515 processing_template_decl
= saved_processing_template_decl
;
8517 if (!TREE_CONSTANT (itype
))
8519 /* A variable sized array. */
8520 itype
= variable_size (itype
);
8522 if (TREE_CODE (itype
) != SAVE_EXPR
)
8524 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8525 they might survive till gimplification. */
8526 tree newitype
= itype
;
8528 cp_walk_tree_without_duplicates (&newitype
,
8529 fold_sizeof_expr_r
, &found
);
8531 itype
= variable_size (fold (newitype
));
8534 stabilize_vla_size (itype
);
8536 if (cxx_dialect
>= cxx14
&& flag_exceptions
)
8538 /* If the VLA bound is larger than half the address space,
8539 or less than zero, throw std::bad_array_length. */
8540 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8542 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8543 throw_bad_array_length (), void_node
);
8544 finish_expr_stmt (comp
);
8546 else if (flag_sanitize
& SANITIZE_VLA
8547 && current_function_decl
!= NULL_TREE
8548 && !lookup_attribute ("no_sanitize_undefined",
8550 (current_function_decl
)))
8552 /* From C++14 onwards, we throw an exception on a negative
8553 length size of an array; see above. */
8555 /* We have to add 1 -- in the ubsan routine we generate
8556 LE_EXPR rather than LT_EXPR. */
8557 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8558 build_one_cst (TREE_TYPE (itype
)));
8559 t
= ubsan_instrument_vla (input_location
, t
);
8560 finish_expr_stmt (t
);
8563 /* Make sure that there was no overflow when creating to a signed
8564 index type. (For example, on a 32-bit machine, an array with
8565 size 2^32 - 1 is too big.) */
8566 else if (TREE_CODE (itype
) == INTEGER_CST
8567 && TREE_OVERFLOW (itype
))
8569 if (!(complain
& tf_error
))
8570 return error_mark_node
;
8571 error ("overflow in array dimension");
8572 TREE_OVERFLOW (itype
) = 0;
8576 /* Create and return the appropriate index type. */
8577 itype
= build_index_type (itype
);
8579 /* If the index type were dependent, we would have returned early, so
8580 remember that it isn't. */
8581 TYPE_DEPENDENT_P (itype
) = 0;
8582 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8586 /* Returns the scope (if any) in which the entity declared by
8587 DECLARATOR will be located. If the entity was declared with an
8588 unqualified name, NULL_TREE is returned. */
8591 get_scope_of_declarator (const cp_declarator
*declarator
)
8593 while (declarator
&& declarator
->kind
!= cdk_id
)
8594 declarator
= declarator
->declarator
;
8596 /* If the declarator-id is a SCOPE_REF, the scope in which the
8597 declaration occurs is the first operand. */
8599 && declarator
->u
.id
.qualifying_scope
)
8600 return declarator
->u
.id
.qualifying_scope
;
8602 /* Otherwise, the declarator is not a qualified name; the entity will
8603 be declared in the current scope. */
8607 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8608 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8612 create_array_type_for_decl (tree name
, tree type
, tree size
)
8614 tree itype
= NULL_TREE
;
8616 /* If things have already gone awry, bail now. */
8617 if (type
== error_mark_node
|| size
== error_mark_node
)
8618 return error_mark_node
;
8620 /* 8.3.4/1: If the type of the identifier of D contains the auto
8621 type-specifier, the program is ill-formed. */
8622 if (type_uses_auto (type
))
8624 error ("%qD declared as array of %qT", name
, type
);
8625 return error_mark_node
;
8628 /* If there are some types which cannot be array elements,
8629 issue an error-message and return. */
8630 switch (TREE_CODE (type
))
8634 error ("declaration of %qD as array of void", name
);
8636 error ("creating array of void");
8637 return error_mark_node
;
8641 error ("declaration of %qD as array of functions", name
);
8643 error ("creating array of functions");
8644 return error_mark_node
;
8646 case REFERENCE_TYPE
:
8648 error ("declaration of %qD as array of references", name
);
8650 error ("creating array of references");
8651 return error_mark_node
;
8655 error ("declaration of %qD as array of function members", name
);
8657 error ("creating array of function members");
8658 return error_mark_node
;
8666 The constant expressions that specify the bounds of the arrays
8667 can be omitted only for the first member of the sequence. */
8668 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8671 error ("declaration of %qD as multidimensional array must "
8672 "have bounds for all dimensions except the first",
8675 error ("multidimensional array must have bounds for all "
8676 "dimensions except the first");
8678 return error_mark_node
;
8681 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
8682 && (flag_iso
|| warn_vla
> 0))
8683 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8685 /* Figure out the index type for the array. */
8687 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8690 T is called the array element type; this type shall not be [...] an
8691 abstract class type. */
8692 abstract_virtuals_error (name
, type
);
8694 return build_cplus_array_type (type
, itype
);
8697 /* Check that it's OK to declare a function with the indicated TYPE.
8698 SFK indicates the kind of special function (if any) that this
8699 function is. OPTYPE is the type given in a conversion operator
8700 declaration, or the class type for a constructor/destructor.
8701 Returns the actual return type of the function; that
8702 may be different than TYPE if an error occurs, or for certain
8703 special functions. */
8706 check_special_function_return_type (special_function_kind sfk
,
8712 case sfk_constructor
:
8714 error ("return type specification for constructor invalid");
8716 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8717 type
= build_pointer_type (optype
);
8719 type
= void_type_node
;
8722 case sfk_destructor
:
8724 error ("return type specification for destructor invalid");
8725 /* We can't use the proper return type here because we run into
8726 problems with ambiguous bases and covariant returns.
8727 Java classes are left unchanged because (void *) isn't a valid
8728 Java type, and we don't want to change the Java ABI. */
8729 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8730 type
= build_pointer_type (void_type_node
);
8732 type
= void_type_node
;
8735 case sfk_conversion
:
8737 error ("return type specified for %<operator %T%>", optype
);
8748 /* A variable or data member (whose unqualified name is IDENTIFIER)
8749 has been declared with the indicated TYPE. If the TYPE is not
8750 acceptable, issue an error message and return a type to use for
8751 error-recovery purposes. */
8754 check_var_type (tree identifier
, tree type
)
8756 if (VOID_TYPE_P (type
))
8759 error ("unnamed variable or field declared void");
8760 else if (identifier_p (identifier
))
8762 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8763 error ("variable or field %qE declared void", identifier
);
8766 error ("variable or field declared void");
8767 type
= error_mark_node
;
8773 /* Given declspecs and a declarator (abstract or otherwise), determine
8774 the name and type of the object declared and construct a DECL node
8777 DECLSPECS points to the representation of declaration-specifier
8778 sequence that precedes declarator.
8780 DECL_CONTEXT says which syntactic context this declaration is in:
8781 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8782 FUNCDEF for a function definition. Like NORMAL but a few different
8783 error messages in each case. Return value may be zero meaning
8784 this definition is too screwy to try to parse.
8785 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8786 handle member functions (which have FIELD context).
8787 Return value may be zero meaning this definition is too screwy to
8789 PARM for a parameter declaration (either within a function prototype
8790 or before a function body). Make a PARM_DECL, or return void_type_node.
8791 TPARM for a template parameter declaration.
8792 CATCHPARM for a parameter declaration before a catch clause.
8793 TYPENAME if for a typename (in a cast or sizeof).
8794 Don't make a DECL node; just return the ..._TYPE node.
8795 FIELD for a struct or union field; make a FIELD_DECL.
8796 BITFIELD for a field with specified width.
8798 INITIALIZED is as for start_decl.
8800 ATTRLIST is a pointer to the list of attributes, which may be NULL
8801 if there are none; *ATTRLIST may be modified if attributes from inside
8802 the declarator should be applied to the declaration.
8804 When this function is called, scoping variables (such as
8805 CURRENT_CLASS_TYPE) should reflect the scope in which the
8806 declaration occurs, not the scope in which the new declaration will
8807 be placed. For example, on:
8811 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8814 Returns a DECL (if a declarator is present), a TYPE (if there is no
8815 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8819 grokdeclarator (const cp_declarator
*declarator
,
8820 cp_decl_specifier_seq
*declspecs
,
8821 enum decl_context decl_context
,
8825 tree type
= NULL_TREE
;
8827 int explicit_intN
= 0;
8828 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8829 int explicit_int
= 0;
8830 int explicit_char
= 0;
8831 int defaulted_int
= 0;
8833 tree typedef_decl
= NULL_TREE
;
8834 const char *name
= NULL
;
8835 tree typedef_type
= NULL_TREE
;
8836 /* True if this declarator is a function definition. */
8837 bool funcdef_flag
= false;
8838 cp_declarator_kind innermost_code
= cdk_error
;
8841 /* See the code below that used this. */
8842 tree decl_attr
= NULL_TREE
;
8845 /* Keep track of what sort of function is being processed
8846 so that we can warn about default return values, or explicit
8847 return values which do not match prescribed defaults. */
8848 special_function_kind sfk
= sfk_none
;
8850 tree dname
= NULL_TREE
;
8851 tree ctor_return_type
= NULL_TREE
;
8852 enum overload_flags flags
= NO_SPECIAL
;
8853 /* cv-qualifiers that apply to the declarator, for a declaration of
8854 a member function. */
8855 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8856 /* virt-specifiers that apply to the declarator, for a declaration of
8857 a member function. */
8858 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8859 /* ref-qualifier that applies to the declarator, for a declaration of
8860 a member function. */
8861 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8862 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8864 tree raises
= NULL_TREE
;
8865 int template_count
= 0;
8866 tree returned_attrs
= NULL_TREE
;
8867 tree parms
= NULL_TREE
;
8868 const cp_declarator
*id_declarator
;
8869 /* The unqualified name of the declarator; either an
8870 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8871 tree unqualified_id
;
8872 /* The class type, if any, in which this entity is located,
8873 or NULL_TREE if none. Note that this value may be different from
8874 the current class type; for example if an attempt is made to declare
8875 "A::f" inside "B", this value will be "A". */
8876 tree ctype
= current_class_type
;
8877 /* The NAMESPACE_DECL for the namespace in which this entity is
8878 located. If an unqualified name is used to declare the entity,
8879 this value will be NULL_TREE, even if the entity is located at
8881 tree in_namespace
= NULL_TREE
;
8882 cp_storage_class storage_class
;
8883 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8884 bool type_was_error_mark_node
= false;
8885 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8886 bool template_type_arg
= false;
8887 bool template_parm_flag
= false;
8888 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8889 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8890 bool late_return_type_p
= false;
8891 bool array_parameter_p
= false;
8892 source_location saved_loc
= input_location
;
8895 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8896 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8897 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8898 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8899 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8900 explicit_intN
= declspecs
->explicit_intN_p
;
8901 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8903 if (decl_context
== FUNCDEF
)
8904 funcdef_flag
= true, decl_context
= NORMAL
;
8905 else if (decl_context
== MEMFUNCDEF
)
8906 funcdef_flag
= true, decl_context
= FIELD
;
8907 else if (decl_context
== BITFIELD
)
8908 bitfield
= 1, decl_context
= FIELD
;
8909 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8910 template_type_arg
= true, decl_context
= TYPENAME
;
8911 else if (decl_context
== TPARM
)
8912 template_parm_flag
= true, decl_context
= PARM
;
8914 if (initialized
> 1)
8915 funcdef_flag
= true;
8917 /* Look inside a declarator for the name being declared
8918 and get it as a string, for an error message. */
8919 for (id_declarator
= declarator
;
8921 id_declarator
= id_declarator
->declarator
)
8923 if (id_declarator
->kind
!= cdk_id
)
8924 innermost_code
= id_declarator
->kind
;
8926 switch (id_declarator
->kind
)
8929 if (id_declarator
->declarator
8930 && id_declarator
->declarator
->kind
== cdk_id
)
8932 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8933 if (sfk
== sfk_destructor
)
8940 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8941 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8944 if (qualifying_scope
)
8946 if (at_function_scope_p ())
8950 A declarator-id shall not be qualified except
8953 None of the cases are permitted in block
8955 if (qualifying_scope
== global_namespace
)
8956 error ("invalid use of qualified-name %<::%D%>",
8958 else if (TYPE_P (qualifying_scope
))
8959 error ("invalid use of qualified-name %<%T::%D%>",
8960 qualifying_scope
, decl
);
8962 error ("invalid use of qualified-name %<%D::%D%>",
8963 qualifying_scope
, decl
);
8964 return error_mark_node
;
8966 else if (TYPE_P (qualifying_scope
))
8968 ctype
= qualifying_scope
;
8969 if (!MAYBE_CLASS_TYPE_P (ctype
))
8971 error ("%q#T is not a class or a namespace", ctype
);
8974 else if (innermost_code
!= cdk_function
8975 && current_class_type
8976 && !uniquely_derived_from_p (ctype
,
8977 current_class_type
))
8979 error ("invalid use of qualified-name %<%T::%D%>",
8980 qualifying_scope
, decl
);
8981 return error_mark_node
;
8984 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8985 in_namespace
= qualifying_scope
;
8987 switch (TREE_CODE (decl
))
8993 if (innermost_code
!= cdk_function
)
8995 error ("declaration of %qD as non-function", decl
);
8996 return error_mark_node
;
8998 else if (!qualifying_scope
8999 && !(current_class_type
&& at_class_scope_p ()))
9001 error ("declaration of %qD as non-member", decl
);
9002 return error_mark_node
;
9005 type
= TREE_OPERAND (decl
, 0);
9007 type
= constructor_name (type
);
9008 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9013 case TEMPLATE_ID_EXPR
:
9015 tree fns
= TREE_OPERAND (decl
, 0);
9018 if (!identifier_p (dname
))
9020 if (variable_template_p (dname
))
9021 dname
= DECL_NAME (dname
);
9024 gcc_assert (is_overloaded_fn (dname
));
9025 dname
= DECL_NAME (get_first_fn (dname
));
9031 case IDENTIFIER_NODE
:
9032 if (identifier_p (decl
))
9035 if (C_IS_RESERVED_WORD (dname
))
9037 error ("declarator-id missing; using reserved word %qD",
9039 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9041 else if (!IDENTIFIER_TYPENAME_P (dname
))
9042 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9045 gcc_assert (flags
== NO_SPECIAL
);
9046 flags
= TYPENAME_FLAG
;
9047 ctor_return_type
= TREE_TYPE (dname
);
9048 sfk
= sfk_conversion
;
9049 if (is_typename_at_global_scope (dname
))
9050 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9052 name
= "<invalid operator>";
9069 return error_mark_node
;
9074 if (id_declarator
->kind
== cdk_id
)
9080 The declarator in a function-definition shall have the form
9081 D1 ( parameter-declaration-clause) ... */
9082 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9084 error ("function definition does not declare parameters");
9085 return error_mark_node
;
9088 if (flags
== TYPENAME_FLAG
9089 && innermost_code
!= cdk_function
9090 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9092 error ("declaration of %qD as non-function", dname
);
9093 return error_mark_node
;
9097 && identifier_p (dname
)
9098 && UDLIT_OPER_P (dname
)
9099 && innermost_code
!= cdk_function
)
9101 error ("declaration of %qD as non-function", dname
);
9102 return error_mark_node
;
9105 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9109 error ("declaration of %qD as %<typedef%>", dname
);
9110 return error_mark_node
;
9112 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9114 error ("declaration of %qD as parameter", dname
);
9115 return error_mark_node
;
9119 /* Anything declared one level down from the top level
9120 must be one of the parameters of a function
9121 (because the body is at least two levels down). */
9123 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9124 by not allowing C++ class definitions to specify their parameters
9125 with xdecls (must be spec.d in the parmlist).
9127 Since we now wait to push a class scope until we are sure that
9128 we are in a legitimate method context, we must set oldcname
9129 explicitly (since current_class_name is not yet alive).
9131 We also want to avoid calling this a PARM if it is in a namespace. */
9133 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9135 cp_binding_level
*b
= current_binding_level
;
9136 current_binding_level
= b
->level_chain
;
9137 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9138 decl_context
= PARM
;
9139 current_binding_level
= b
;
9143 name
= decl_context
== PARM
? "parameter" : "type name";
9145 if (constexpr_p
&& typedef_p
)
9147 error ("%<constexpr%> cannot appear in a typedef declaration");
9148 return error_mark_node
;
9151 /* If there were multiple types specified in the decl-specifier-seq,
9152 issue an error message. */
9153 if (declspecs
->multiple_types_p
)
9155 error ("two or more data types in declaration of %qs", name
);
9156 return error_mark_node
;
9159 if (declspecs
->conflicting_specifiers_p
)
9161 error ("conflicting specifiers in declaration of %qs", name
);
9162 return error_mark_node
;
9165 /* Extract the basic type from the decl-specifier-seq. */
9166 type
= declspecs
->type
;
9167 if (type
== error_mark_node
)
9170 type_was_error_mark_node
= true;
9172 /* If the entire declaration is itself tagged as deprecated then
9173 suppress reports of deprecated items. */
9174 if (type
&& TREE_DEPRECATED (type
)
9175 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9176 warn_deprecated_use (type
, NULL_TREE
);
9177 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9179 typedef_decl
= type
;
9180 type
= TREE_TYPE (typedef_decl
);
9181 if (TREE_DEPRECATED (type
)
9182 && DECL_ARTIFICIAL (typedef_decl
)
9183 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9184 warn_deprecated_use (type
, NULL_TREE
);
9186 /* No type at all: default to `int', and set DEFAULTED_INT
9187 because it was not a user-defined typedef. */
9188 if (type
== NULL_TREE
)
9190 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9192 /* These imply 'int'. */
9193 type
= integer_type_node
;
9196 /* If we just have "complex", it is equivalent to "complex double". */
9197 else if (!longlong
&& !explicit_intN
9198 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9200 type
= double_type_node
;
9201 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9202 "ISO C++ does not support plain %<complex%> meaning "
9203 "%<double complex%>");
9207 explicit_int
= declspecs
->explicit_int_p
;
9208 explicit_char
= declspecs
->explicit_char_p
;
9211 /* See the code below that used this. */
9213 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9215 typedef_type
= type
;
9218 if (sfk
!= sfk_conversion
)
9219 ctor_return_type
= ctype
;
9221 if (sfk
!= sfk_none
)
9222 type
= check_special_function_return_type (sfk
, type
,
9224 else if (type
== NULL_TREE
)
9230 /* We handle `main' specially here, because 'main () { }' is so
9231 common. With no options, it is allowed. With -Wreturn-type,
9232 it is a warning. It is only an error with -pedantic-errors. */
9233 is_main
= (funcdef_flag
9234 && dname
&& identifier_p (dname
)
9235 && MAIN_NAME_P (dname
)
9236 && ctype
== NULL_TREE
9237 && in_namespace
== NULL_TREE
9238 && current_namespace
== global_namespace
);
9240 if (type_was_error_mark_node
)
9241 /* We've already issued an error, don't complain more. */;
9242 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9243 /* Allow it, sigh. */;
9245 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9247 pedwarn (input_location
, OPT_Wpedantic
,
9248 "ISO C++ forbids declaration of %qs with no type", name
);
9250 warning (OPT_Wreturn_type
,
9251 "ISO C++ forbids declaration of %qs with no type", name
);
9253 type
= integer_type_node
;
9260 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9262 error ("%<__int%d%> is not supported by this target",
9263 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9264 explicit_intN
= false;
9266 else if (pedantic
&& ! in_system_header_at (input_location
))
9267 pedwarn (input_location
, OPT_Wpedantic
,
9268 "ISO C++ does not support %<__int%d%> for %qs",
9269 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9272 /* Now process the modifiers that were specified
9273 and check for invalid combinations. */
9275 /* Long double is a special combination. */
9276 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9279 type
= cp_build_qualified_type (long_double_type_node
,
9280 cp_type_quals (type
));
9283 /* Check all other uses of type modifiers. */
9285 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9289 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9290 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9291 else if (signed_p
&& unsigned_p
)
9292 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9293 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9294 error ("%<long long%> invalid for %qs", name
);
9295 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9296 error ("%<long%> invalid for %qs", name
);
9297 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9298 error ("%<short%> invalid for %qs", name
);
9299 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9300 error ("%<long%> or %<short%> invalid for %qs", name
);
9301 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9302 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9303 else if ((long_p
|| short_p
) && explicit_char
)
9304 error ("%<long%> or %<short%> specified with char for %qs", name
);
9305 else if (long_p
&& short_p
)
9306 error ("%<long%> and %<short%> specified together for %qs", name
);
9307 else if (type
== char16_type_node
|| type
== char32_type_node
)
9309 if (signed_p
|| unsigned_p
)
9310 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9311 else if (short_p
|| long_p
)
9312 error ("%<short%> or %<long%> invalid for %qs", name
);
9317 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9319 pedwarn (input_location
, OPT_Wpedantic
,
9320 "long, short, signed or unsigned used invalidly for %qs",
9322 if (flag_pedantic_errors
)
9327 /* Discard the type modifiers if they are invalid. */
9338 /* Decide whether an integer type is signed or not.
9339 Optionally treat bitfields as signed by default. */
9343 It is implementation-defined whether a plain (neither
9344 explicitly signed or unsigned) char, short, int, or long
9345 bit-field is signed or unsigned.
9347 Naturally, we extend this to long long as well. Note that
9348 this does not include wchar_t. */
9349 || (bitfield
&& !flag_signed_bitfields
9351 /* A typedef for plain `int' without `signed' can be
9352 controlled just like plain `int', but a typedef for
9353 `signed int' cannot be so controlled. */
9355 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9356 && TREE_CODE (type
) == INTEGER_TYPE
9357 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9360 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9362 type
= long_long_unsigned_type_node
;
9364 type
= long_unsigned_type_node
;
9366 type
= short_unsigned_type_node
;
9367 else if (type
== char_type_node
)
9368 type
= unsigned_char_type_node
;
9369 else if (typedef_decl
)
9370 type
= unsigned_type_for (type
);
9372 type
= unsigned_type_node
;
9374 else if (signed_p
&& type
== char_type_node
)
9375 type
= signed_char_type_node
;
9376 else if (explicit_intN
)
9377 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9379 type
= long_long_integer_type_node
;
9381 type
= long_integer_type_node
;
9383 type
= short_integer_type_node
;
9385 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9387 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9388 error ("complex invalid for %qs", name
);
9389 /* If a modifier is specified, the resulting complex is the complex
9390 form of TYPE. E.g, "complex short" is "complex short int". */
9391 else if (type
== integer_type_node
)
9392 type
= complex_integer_type_node
;
9393 else if (type
== float_type_node
)
9394 type
= complex_float_type_node
;
9395 else if (type
== double_type_node
)
9396 type
= complex_double_type_node
;
9397 else if (type
== long_double_type_node
)
9398 type
= complex_long_double_type_node
;
9400 type
= build_complex_type (type
);
9403 type_quals
= TYPE_UNQUALIFIED
;
9404 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9405 type_quals
|= TYPE_QUAL_CONST
;
9406 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9407 type_quals
|= TYPE_QUAL_VOLATILE
;
9408 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9409 type_quals
|= TYPE_QUAL_RESTRICT
;
9410 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9411 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9414 /* If we're using the injected-class-name to form a compound type or a
9415 declaration, replace it with the underlying class so we don't get
9416 redundant typedefs in the debug output. But if we are returning the
9417 type unchanged, leave it alone so that it's available to
9418 maybe_get_template_decl_from_type_decl. */
9419 if (CLASS_TYPE_P (type
)
9420 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9421 && type
== TREE_TYPE (TYPE_NAME (type
))
9422 && (declarator
|| type_quals
))
9423 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9425 type_quals
|= cp_type_quals (type
);
9426 type
= cp_build_qualified_type_real
9427 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9428 || declspecs
->decltype_p
)
9429 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9430 /* We might have ignored or rejected some of the qualifiers. */
9431 type_quals
= cp_type_quals (type
);
9434 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9435 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9436 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9438 storage_class
= declspecs
->storage_class
;
9439 if (storage_class
== sc_static
)
9440 staticp
= 1 + (decl_context
== FIELD
);
9442 if (virtualp
&& staticp
== 2)
9444 error ("member %qD cannot be declared both virtual and static", dname
);
9445 storage_class
= sc_none
;
9448 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9450 /* Issue errors about use of storage classes for parameters. */
9451 if (decl_context
== PARM
)
9455 error ("typedef declaration invalid in parameter declaration");
9456 return error_mark_node
;
9458 else if (template_parm_flag
&& storage_class
!= sc_none
)
9460 error ("storage class specified for template parameter %qs", name
);
9461 return error_mark_node
;
9463 else if (storage_class
== sc_static
9464 || storage_class
== sc_extern
9466 error ("storage class specifiers invalid in parameter declarations");
9468 /* Function parameters cannot be constexpr. If we saw one, moan
9469 and pretend it wasn't there. */
9472 error ("a parameter cannot be declared %<constexpr%>");
9477 /* Give error if `virtual' is used outside of class declaration. */
9479 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9481 error ("%<virtual%> outside class declaration");
9485 /* Static anonymous unions are dealt with here. */
9486 if (staticp
&& decl_context
== TYPENAME
9488 && ANON_AGGR_TYPE_P (declspecs
->type
))
9489 decl_context
= FIELD
;
9491 /* Warn about storage classes that are invalid for certain
9492 kinds of declarations (parameters, typenames, etc.). */
9495 && storage_class
!= sc_extern
9496 && storage_class
!= sc_static
)
9499 error ("multiple storage classes in declaration of %qs", name
);
9502 if (decl_context
!= NORMAL
9503 && ((storage_class
!= sc_none
9504 && storage_class
!= sc_mutable
)
9507 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9508 && (storage_class
== sc_register
9509 || storage_class
== sc_auto
))
9513 else if (decl_context
== FIELD
9514 /* C++ allows static class elements. */
9515 && storage_class
== sc_static
)
9516 /* C++ also allows inlines and signed and unsigned elements,
9517 but in those cases we don't come in here. */
9521 if (decl_context
== FIELD
)
9522 error ("storage class specified for %qs", name
);
9525 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9526 error ("storage class specified for parameter %qs", name
);
9528 error ("storage class specified for typename");
9530 if (storage_class
== sc_register
9531 || storage_class
== sc_auto
9532 || storage_class
== sc_extern
9534 storage_class
= sc_none
;
9537 else if (storage_class
== sc_extern
&& funcdef_flag
9538 && ! toplevel_bindings_p ())
9539 error ("nested function %qs declared %<extern%>", name
);
9540 else if (toplevel_bindings_p ())
9542 if (storage_class
== sc_auto
)
9543 error ("top-level declaration of %qs specifies %<auto%>", name
);
9546 && storage_class
!= sc_extern
9547 && storage_class
!= sc_static
)
9549 if (declspecs
->gnu_thread_keyword_p
)
9550 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9551 "declared %<__thread%>", name
);
9553 /* When thread_local is applied to a variable of block scope the
9554 storage-class-specifier static is implied if it does not appear
9556 storage_class
= declspecs
->storage_class
= sc_static
;
9560 if (storage_class
&& friendp
)
9562 error ("storage class specifiers invalid in friend function declarations");
9563 storage_class
= sc_none
;
9568 unqualified_id
= NULL_TREE
;
9571 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9572 switch (TREE_CODE (unqualified_id
))
9575 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9576 if (TYPE_P (unqualified_id
))
9577 unqualified_id
= constructor_name (unqualified_id
);
9580 case IDENTIFIER_NODE
:
9581 case TEMPLATE_ID_EXPR
:
9589 if (declspecs
->std_attributes
)
9591 /* Apply the c++11 attributes to the type preceding them. */
9592 input_location
= declspecs
->locations
[ds_std_attribute
];
9593 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9594 input_location
= saved_loc
;
9597 /* Determine the type of the entity declared by recurring on the
9599 for (; declarator
; declarator
= declarator
->declarator
)
9601 const cp_declarator
*inner_declarator
;
9604 if (type
== error_mark_node
)
9605 return error_mark_node
;
9607 attrs
= declarator
->attributes
;
9613 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9614 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9615 if (declarator
->kind
== cdk_function
)
9616 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9617 if (declarator
->kind
== cdk_array
)
9618 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9619 returned_attrs
= decl_attributes (&type
,
9620 chainon (returned_attrs
, attrs
),
9624 if (declarator
->kind
== cdk_id
)
9627 inner_declarator
= declarator
->declarator
;
9629 switch (declarator
->kind
)
9632 type
= create_array_type_for_decl (dname
, type
,
9633 declarator
->u
.array
.bounds
);
9634 if (declarator
->std_attributes
)
9637 The optional attribute-specifier-seq appertains to the
9639 returned_attrs
= chainon (returned_attrs
,
9640 declarator
->std_attributes
);
9648 /* Declaring a function type.
9649 Make sure we have a valid type for the function to return. */
9651 if (type_quals
!= TYPE_UNQUALIFIED
)
9653 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9654 warning (OPT_Wignored_qualifiers
,
9655 "type qualifiers ignored on function return type");
9656 /* We now know that the TYPE_QUALS don't apply to the
9657 decl, but to its return type. */
9658 type_quals
= TYPE_UNQUALIFIED
;
9660 errmsg
= targetm
.invalid_return_type (type
);
9664 type
= integer_type_node
;
9667 /* Error about some types functions can't return. */
9669 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9671 error ("%qs declared as function returning a function", name
);
9672 return error_mark_node
;
9674 if (TREE_CODE (type
) == ARRAY_TYPE
)
9676 error ("%qs declared as function returning an array", name
);
9677 return error_mark_node
;
9680 input_location
= declspecs
->locations
[ds_type_spec
];
9681 abstract_virtuals_error (ACU_RETURN
, type
);
9682 input_location
= saved_loc
;
9684 /* Pick up type qualifiers which should be applied to `this'. */
9685 memfn_quals
= declarator
->u
.function
.qualifiers
;
9686 /* Pick up virt-specifiers. */
9687 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9688 /* And ref-qualifier, too */
9689 rqual
= declarator
->u
.function
.ref_qualifier
;
9690 /* Pick up the exception specifications. */
9691 raises
= declarator
->u
.function
.exception_specification
;
9692 /* If the exception-specification is ill-formed, let's pretend
9693 there wasn't one. */
9694 if (raises
== error_mark_node
)
9697 /* Say it's a definition only for the CALL_EXPR
9698 closest to the identifier. */
9699 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9701 /* Handle a late-specified return type. */
9704 if (type_uses_auto (type
))
9706 if (!declarator
->u
.function
.late_return_type
)
9708 if (current_class_type
9709 && LAMBDA_TYPE_P (current_class_type
))
9710 /* OK for C++11 lambdas. */;
9711 else if (cxx_dialect
< cxx14
)
9713 error ("%qs function uses "
9714 "%<auto%> type specifier without trailing "
9715 "return type", name
);
9716 inform (input_location
, "deduced return type "
9717 "only available with -std=c++14 or "
9722 error ("virtual function cannot "
9723 "have deduced return type");
9727 else if (!is_auto (type
))
9729 error ("%qs function with trailing return type has"
9730 " %qT as its type rather than plain %<auto%>",
9732 return error_mark_node
;
9735 else if (declarator
->u
.function
.late_return_type
)
9737 if (cxx_dialect
< cxx11
)
9738 /* Not using maybe_warn_cpp0x because this should
9739 always be an error. */
9740 error ("trailing return type only available with "
9741 "-std=c++11 or -std=gnu++11");
9743 error ("%qs function with trailing return type not "
9744 "declared with %<auto%> type specifier", name
);
9745 return error_mark_node
;
9748 type
= splice_late_return_type
9749 (type
, declarator
->u
.function
.late_return_type
);
9750 if (type
== error_mark_node
)
9751 return error_mark_node
;
9753 if (declarator
->u
.function
.late_return_type
)
9754 late_return_type_p
= true;
9756 if (ctype
== NULL_TREE
9757 && decl_context
== FIELD
9760 ctype
= current_class_type
;
9762 if (ctype
&& (sfk
== sfk_constructor
9763 || sfk
== sfk_destructor
))
9765 /* We are within a class's scope. If our declarator name
9766 is the same as the class name, and we are defining
9767 a function, then it is a constructor/destructor, and
9768 therefore returns a void type. */
9770 /* ISO C++ 12.4/2. A destructor may not be declared
9771 const or volatile. A destructor may not be static.
9772 A destructor may not be declared with ref-qualifier.
9774 ISO C++ 12.1. A constructor may not be declared
9775 const or volatile. A constructor may not be
9776 virtual. A constructor may not be static.
9777 A constructor may not be declared with ref-qualifier. */
9779 error ((flags
== DTOR_FLAG
)
9780 ? G_("destructor cannot be static member function")
9781 : G_("constructor cannot be static member function"));
9784 error ((flags
== DTOR_FLAG
)
9785 ? G_("destructors may not be cv-qualified")
9786 : G_("constructors may not be cv-qualified"));
9787 memfn_quals
= TYPE_UNQUALIFIED
;
9792 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9793 error ((flags
== DTOR_FLAG
)
9794 ? "destructors may not be ref-qualified"
9795 : "constructors may not be ref-qualified");
9796 rqual
= REF_QUAL_NONE
;
9799 if (decl_context
== FIELD
9800 && !member_function_or_else (ctype
,
9803 return error_mark_node
;
9805 if (flags
!= DTOR_FLAG
)
9807 /* It's a constructor. */
9812 permerror (input_location
, "constructors cannot be declared virtual");
9815 if (decl_context
== FIELD
9816 && sfk
!= sfk_constructor
)
9817 return error_mark_node
;
9819 if (decl_context
== FIELD
)
9826 /* Cannot be both friend and virtual. */
9827 error ("virtual functions cannot be friends");
9830 if (decl_context
== NORMAL
)
9831 error ("friend declaration not in class definition");
9832 if (current_function_decl
&& funcdef_flag
)
9833 error ("can%'t define friend function %qs in a local "
9837 else if (ctype
&& sfk
== sfk_conversion
)
9841 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9846 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9849 if (inner_declarator
9850 && inner_declarator
->kind
== cdk_id
9851 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9852 && arg_types
!= void_list_node
)
9854 error ("destructors may not have parameters");
9855 arg_types
= void_list_node
;
9859 type
= build_function_type (type
, arg_types
);
9860 if (declarator
->std_attributes
)
9863 The optional attribute-specifier-seq appertains to
9864 the function type. */
9865 decl_attributes (&type
, declarator
->std_attributes
,
9873 /* Filter out pointers-to-references and references-to-references.
9874 We can get these if a TYPE_DECL is used. */
9876 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9878 if (declarator
->kind
!= cdk_reference
)
9880 error ("cannot declare pointer to %q#T", type
);
9881 type
= TREE_TYPE (type
);
9884 /* In C++0x, we allow reference to reference declarations
9885 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9886 and template type arguments [14.3.1/4 temp.arg.type]. The
9887 check for direct reference to reference declarations, which
9888 are still forbidden, occurs below. Reasoning behind the change
9889 can be found in DR106, DR540, and the rvalue reference
9891 else if (cxx_dialect
== cxx98
)
9893 error ("cannot declare reference to %q#T", type
);
9894 type
= TREE_TYPE (type
);
9897 else if (VOID_TYPE_P (type
))
9899 if (declarator
->kind
== cdk_reference
)
9900 error ("cannot declare reference to %q#T", type
);
9901 else if (declarator
->kind
== cdk_ptrmem
)
9902 error ("cannot declare pointer to %q#T member", type
);
9905 /* We now know that the TYPE_QUALS don't apply to the decl,
9906 but to the target of the pointer. */
9907 type_quals
= TYPE_UNQUALIFIED
;
9909 /* This code used to handle METHOD_TYPE, but I don't think it's
9910 possible to get it here anymore. */
9911 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9912 if (declarator
->kind
== cdk_ptrmem
9913 && TREE_CODE (type
) == FUNCTION_TYPE
)
9915 memfn_quals
|= type_memfn_quals (type
);
9916 type
= build_memfn_type (type
,
9917 declarator
->u
.pointer
.class_type
,
9920 if (type
== error_mark_node
)
9921 return error_mark_node
;
9923 rqual
= REF_QUAL_NONE
;
9924 memfn_quals
= TYPE_UNQUALIFIED
;
9927 if (TREE_CODE (type
) == FUNCTION_TYPE
9928 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9929 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9930 error (declarator
->kind
== cdk_reference
9931 ? G_("cannot declare reference to qualified function type %qT")
9932 : G_("cannot declare pointer to qualified function type %qT"),
9935 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
9936 && (flag_iso
|| warn_vla
> 0))
9937 pedwarn (input_location
, OPT_Wvla
,
9938 declarator
->kind
== cdk_reference
9939 ? G_("reference to array of runtime bound")
9940 : G_("pointer to array of runtime bound"));
9942 /* When the pointed-to type involves components of variable size,
9943 care must be taken to ensure that the size evaluation code is
9944 emitted early enough to dominate all the possible later uses
9945 and late enough for the variables on which it depends to have
9948 This is expected to happen automatically when the pointed-to
9949 type has a name/declaration of it's own, but special attention
9950 is required if the type is anonymous.
9952 We handle the NORMAL and FIELD contexts here by inserting a
9953 dummy statement that just evaluates the size at a safe point
9954 and ensures it is not deferred until e.g. within a deeper
9955 conditional context (c++/43555).
9957 We expect nothing to be needed here for PARM or TYPENAME.
9958 Evaluating the size at this point for TYPENAME would
9959 actually be incorrect, as we might be in the middle of an
9960 expression with side effects on the pointed-to type size
9961 "arguments" prior to the pointer declaration point and the
9962 size evaluation could end up prior to the side effects. */
9964 if (!TYPE_NAME (type
)
9965 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9966 && at_function_scope_p ()
9967 && variably_modified_type_p (type
, NULL_TREE
))
9968 /* Force evaluation of the SAVE_EXPR. */
9969 finish_expr_stmt (TYPE_SIZE (type
));
9971 if (declarator
->kind
== cdk_reference
)
9973 /* In C++0x, the type we are creating a reference to might be
9974 a typedef which is itself a reference type. In that case,
9975 we follow the reference collapsing rules in
9976 [7.1.3/8 dcl.typedef] to create the final reference type:
9978 "If a typedef TD names a type that is a reference to a type
9979 T, an attempt to create the type 'lvalue reference to cv TD'
9980 creates the type 'lvalue reference to T,' while an attempt
9981 to create the type "rvalue reference to cv TD' creates the
9984 if (VOID_TYPE_P (type
))
9985 /* We already gave an error. */;
9986 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9988 if (declarator
->u
.reference
.rvalue_ref
)
9989 /* Leave type alone. */;
9991 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9994 type
= cp_build_reference_type
9995 (type
, declarator
->u
.reference
.rvalue_ref
);
9997 /* In C++0x, we need this check for direct reference to
9998 reference declarations, which are forbidden by
9999 [8.3.2/5 dcl.ref]. Reference to reference declarations
10000 are only allowed indirectly through typedefs and template
10001 type arguments. Example:
10003 void foo(int & &); // invalid ref-to-ref decl
10005 typedef int & int_ref;
10006 void foo(int_ref &); // valid ref-to-ref decl
10008 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10009 error ("cannot declare reference to %q#T, which is not "
10010 "a typedef or a template type argument", type
);
10012 else if (TREE_CODE (type
) == METHOD_TYPE
)
10013 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10014 else if (declarator
->kind
== cdk_ptrmem
)
10016 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10017 != NAMESPACE_DECL
);
10018 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10019 /* We will already have complained. */
10020 type
= error_mark_node
;
10022 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10026 type
= build_pointer_type (type
);
10028 /* Process a list of type modifier keywords (such as
10029 const or volatile) that were given inside the `*' or `&'. */
10031 if (declarator
->u
.pointer
.qualifiers
)
10034 = cp_build_qualified_type (type
,
10035 declarator
->u
.pointer
.qualifiers
);
10036 type_quals
= cp_type_quals (type
);
10039 /* Apply C++11 attributes to the pointer, and not to the
10040 type pointed to. This is unlike what is done for GNU
10041 attributes above. It is to comply with [dcl.ptr]/1:
10043 [the optional attribute-specifier-seq (7.6.1) appertains
10044 to the pointer and not to the object pointed to]. */
10045 if (declarator
->std_attributes
)
10046 decl_attributes (&type
, declarator
->std_attributes
,
10056 gcc_unreachable ();
10060 /* A `constexpr' specifier used in an object declaration declares
10061 the object as `const'. */
10062 if (constexpr_p
&& innermost_code
!= cdk_function
)
10064 if (type_quals
& TYPE_QUAL_VOLATILE
)
10065 error ("both %<volatile%> and %<constexpr%> cannot be used here");
10066 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10068 type_quals
|= TYPE_QUAL_CONST
;
10069 type
= cp_build_qualified_type (type
, type_quals
);
10073 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10074 && TREE_CODE (type
) != FUNCTION_TYPE
10075 && TREE_CODE (type
) != METHOD_TYPE
10076 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10078 error ("template-id %qD used as a declarator",
10080 unqualified_id
= dname
;
10083 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10084 qualified with a class-name, turn it into a METHOD_TYPE, unless
10085 we know that the function is static. We take advantage of this
10086 opportunity to do other processing that pertains to entities
10087 explicitly declared to be class members. Note that if DECLARATOR
10088 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10089 would not have exited the loop above. */
10091 && declarator
->u
.id
.qualifying_scope
10092 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10094 ctype
= declarator
->u
.id
.qualifying_scope
;
10095 ctype
= TYPE_MAIN_VARIANT (ctype
);
10096 template_count
= num_template_headers_for_class (ctype
);
10098 if (ctype
== current_class_type
)
10102 permerror (input_location
, "member functions are implicitly friends of their class");
10106 permerror (declarator
->id_loc
,
10107 "extra qualification %<%T::%> on member %qs",
10110 else if (/* If the qualifying type is already complete, then we
10111 can skip the following checks. */
10112 !COMPLETE_TYPE_P (ctype
)
10113 && (/* If the function is being defined, then
10114 qualifying type must certainly be complete. */
10116 /* A friend declaration of "T::f" is OK, even if
10117 "T" is a template parameter. But, if this
10118 function is not a friend, the qualifying type
10119 must be a class. */
10120 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10121 /* For a declaration, the type need not be
10122 complete, if either it is dependent (since there
10123 is no meaningful definition of complete in that
10124 case) or the qualifying class is currently being
10126 || !(dependent_type_p (ctype
)
10127 || currently_open_class (ctype
)))
10128 /* Check that the qualifying type is complete. */
10129 && !complete_type_or_else (ctype
, NULL_TREE
))
10130 return error_mark_node
;
10131 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10133 if (current_class_type
10134 && (!friendp
|| funcdef_flag
))
10136 error (funcdef_flag
10137 ? G_("cannot define member function %<%T::%s%> "
10139 : G_("cannot declare member function %<%T::%s%> "
10141 ctype
, name
, current_class_type
);
10142 return error_mark_node
;
10145 else if (typedef_p
&& current_class_type
)
10147 error ("cannot declare member %<%T::%s%> within %qT",
10148 ctype
, name
, current_class_type
);
10149 return error_mark_node
;
10153 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10154 ctype
= current_class_type
;
10156 /* Now TYPE has the actual type. */
10158 if (returned_attrs
)
10161 *attrlist
= chainon (returned_attrs
, *attrlist
);
10163 attrlist
= &returned_attrs
;
10167 && declarator
->kind
== cdk_id
10168 && declarator
->std_attributes
)
10169 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10170 a declarator-id appertains to the entity that is declared. */
10171 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10173 /* Handle parameter packs. */
10174 if (parameter_pack_p
)
10176 if (decl_context
== PARM
)
10177 /* Turn the type into a pack expansion.*/
10178 type
= make_pack_expansion (type
);
10180 error ("non-parameter %qs cannot be a parameter pack", name
);
10183 /* Did array size calculations overflow or does the array cover more
10184 than half of the address-space? */
10185 if (TREE_CODE (type
) == ARRAY_TYPE
10186 && COMPLETE_TYPE_P (type
)
10187 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10188 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10190 error ("size of array %qs is too large", name
);
10191 /* If we proceed with the array type as it is, we'll eventually
10192 crash in tree_to_[su]hwi(). */
10193 type
= error_mark_node
;
10196 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10197 && !processing_template_decl
10198 && variably_modified_type_p (type
, NULL_TREE
))
10200 if (decl_context
== FIELD
)
10201 error ("data member may not have variably modified type %qT", type
);
10203 error ("parameter may not have variably modified type %qT", type
);
10204 type
= error_mark_node
;
10207 if (explicitp
== 1 || (explicitp
&& friendp
))
10209 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10210 in the declaration of a constructor or conversion function within
10211 a class definition. */
10212 if (!current_class_type
)
10213 error ("%<explicit%> outside class declaration");
10215 error ("%<explicit%> in friend declaration");
10217 error ("only declarations of constructors and conversion operators "
10218 "can be %<explicit%>");
10222 if (storage_class
== sc_mutable
)
10224 if (decl_context
!= FIELD
|| friendp
)
10226 error ("non-member %qs cannot be declared %<mutable%>", name
);
10227 storage_class
= sc_none
;
10229 else if (decl_context
== TYPENAME
|| typedef_p
)
10231 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10232 storage_class
= sc_none
;
10234 else if (TREE_CODE (type
) == FUNCTION_TYPE
10235 || TREE_CODE (type
) == METHOD_TYPE
)
10237 error ("function %qs cannot be declared %<mutable%>", name
);
10238 storage_class
= sc_none
;
10242 error ("static %qs cannot be declared %<mutable%>", name
);
10243 storage_class
= sc_none
;
10245 else if (type_quals
& TYPE_QUAL_CONST
)
10247 error ("const %qs cannot be declared %<mutable%>", name
);
10248 storage_class
= sc_none
;
10250 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10252 permerror (input_location
, "reference %qs cannot be declared "
10253 "%<mutable%>", name
);
10254 storage_class
= sc_none
;
10258 /* If this is declaring a typedef name, return a TYPE_DECL. */
10259 if (typedef_p
&& decl_context
!= TYPENAME
)
10263 /* Note that the grammar rejects storage classes
10264 in typenames, fields or parameters. */
10265 if (current_lang_name
== lang_name_java
)
10266 TYPE_FOR_JAVA (type
) = 1;
10268 /* This declaration:
10270 typedef void f(int) const;
10272 declares a function type which is not a member of any
10273 particular class, but which is cv-qualified; for
10274 example "f S::*" declares a pointer to a const-qualified
10275 member function of S. We record the cv-qualification in the
10277 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10279 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10281 /* We have now dealt with these qualifiers. */
10282 memfn_quals
= TYPE_UNQUALIFIED
;
10283 rqual
= REF_QUAL_NONE
;
10286 if (type_uses_auto (type
))
10288 error ("typedef declared %<auto%>");
10289 type
= error_mark_node
;
10292 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
10293 && (flag_iso
|| warn_vla
> 0))
10294 pedwarn (input_location
, OPT_Wvla
,
10295 "typedef naming array of runtime bound");
10297 if (decl_context
== FIELD
)
10298 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10300 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10301 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10302 error_at (DECL_SOURCE_LOCATION (decl
),
10303 "typedef name may not be a nested-name-specifier");
10304 TREE_TYPE (decl
) = error_mark_node
;
10307 if (decl_context
!= FIELD
)
10309 if (!current_function_decl
)
10310 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10311 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10312 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10313 (current_function_decl
)))
10314 /* The TYPE_DECL is "abstract" because there will be
10315 clones of this constructor/destructor, and there will
10316 be copies of this TYPE_DECL generated in those
10317 clones. The decloning optimization (for space) may
10318 revert this subsequently if it determines that
10319 the clones should share a common implementation. */
10320 DECL_ABSTRACT_P (decl
) = true;
10322 else if (current_class_type
10323 && constructor_name_p (unqualified_id
, current_class_type
))
10324 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10325 "as enclosing class",
10328 /* If the user declares "typedef struct {...} foo" then the
10329 struct will have an anonymous name. Fill that name in now.
10330 Nothing can refer to it, so nothing needs know about the name
10332 if (type
!= error_mark_node
10334 && TYPE_NAME (type
)
10335 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10336 && TYPE_ANONYMOUS_P (type
)
10337 && declspecs
->type_definition_p
10338 && attributes_naming_typedef_ok (*attrlist
)
10339 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10343 /* Replace the anonymous name with the real name everywhere. */
10344 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10346 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10347 /* We do not rename the debug info representing the
10348 anonymous tagged type because the standard says in
10349 [dcl.typedef] that the naming applies only for
10350 linkage purposes. */
10351 /*debug_hooks->set_name (t, decl);*/
10352 TYPE_NAME (t
) = decl
;
10355 if (TYPE_LANG_SPECIFIC (type
))
10356 TYPE_WAS_ANONYMOUS (type
) = 1;
10358 /* If this is a typedef within a template class, the nested
10359 type is a (non-primary) template. The name for the
10360 template needs updating as well. */
10361 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10362 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10363 = TYPE_IDENTIFIER (type
);
10365 /* Adjust linkage now that we aren't anonymous anymore. */
10366 reset_type_linkage (type
);
10368 /* FIXME remangle member functions; member functions of a
10369 type with external linkage have external linkage. */
10373 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10374 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10376 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10377 memfn_quals
!= TYPE_UNQUALIFIED
,
10378 inlinep
, friendp
, raises
!= NULL_TREE
);
10380 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10381 /* Acknowledge that this was written:
10382 `using analias = atype;'. */
10383 TYPE_DECL_ALIAS_P (decl
) = 1;
10388 /* Detect the case of an array type of unspecified size
10389 which came, as such, direct from a typedef name.
10390 We must copy the type, so that the array's domain can be
10391 individually set by the object's initializer. */
10393 if (type
&& typedef_type
10394 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10395 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10396 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10398 /* Detect where we're using a typedef of function type to declare a
10399 function. PARMS will not be set, so we must create it now. */
10401 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10403 tree decls
= NULL_TREE
;
10406 for (args
= TYPE_ARG_TYPES (type
);
10407 args
&& args
!= void_list_node
;
10408 args
= TREE_CHAIN (args
))
10410 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10412 DECL_CHAIN (decl
) = decls
;
10416 parms
= nreverse (decls
);
10418 if (decl_context
!= TYPENAME
)
10420 /* The qualifiers on the function type become the qualifiers on
10421 the non-static member function. */
10422 memfn_quals
|= type_memfn_quals (type
);
10423 rqual
= type_memfn_rqual (type
);
10424 type_quals
= TYPE_UNQUALIFIED
;
10428 /* If this is a type name (such as, in a cast or sizeof),
10429 compute the type and return it now. */
10431 if (decl_context
== TYPENAME
)
10433 /* Note that the grammar rejects storage classes
10434 in typenames, fields or parameters. */
10435 if (type_quals
!= TYPE_UNQUALIFIED
)
10436 type_quals
= TYPE_UNQUALIFIED
;
10438 /* Special case: "friend class foo" looks like a TYPENAME context. */
10441 if (type_quals
!= TYPE_UNQUALIFIED
)
10443 error ("type qualifiers specified for friend class declaration");
10444 type_quals
= TYPE_UNQUALIFIED
;
10448 error ("%<inline%> specified for friend class declaration");
10454 /* Don't allow friend declaration without a class-key. */
10455 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10456 permerror (input_location
, "template parameters cannot be friends");
10457 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10458 permerror (input_location
, "friend declaration requires class-key, "
10459 "i.e. %<friend class %T::%D%>",
10460 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10462 permerror (input_location
, "friend declaration requires class-key, "
10463 "i.e. %<friend %#T%>",
10467 /* Only try to do this stuff if we didn't already give up. */
10468 if (type
!= integer_type_node
)
10470 /* A friendly class? */
10471 if (current_class_type
)
10472 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10473 /*complain=*/true);
10475 error ("trying to make class %qT a friend of global scope",
10478 type
= void_type_node
;
10481 else if (memfn_quals
|| rqual
)
10483 if (ctype
== NULL_TREE
10484 && TREE_CODE (type
) == METHOD_TYPE
)
10485 ctype
= TYPE_METHOD_BASETYPE (type
);
10488 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10489 /* Core issue #547: need to allow this in template type args.
10490 Allow it in general in C++11 for alias-declarations. */
10491 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10492 && TREE_CODE (type
) == FUNCTION_TYPE
)
10493 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10495 error ("invalid qualifiers on non-member function type");
10500 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10501 && decl_context
!= CATCHPARM
10502 && TREE_CODE (type
) != UNION_TYPE
10505 error ("abstract declarator %qT used as declaration", type
);
10506 return error_mark_node
;
10509 /* Only functions may be declared using an operator-function-id. */
10511 && IDENTIFIER_OPNAME_P (unqualified_id
)
10512 && TREE_CODE (type
) != FUNCTION_TYPE
10513 && TREE_CODE (type
) != METHOD_TYPE
)
10515 error ("declaration of %qD as non-function", unqualified_id
);
10516 return error_mark_node
;
10519 /* We don't check parameter types here because we can emit a better
10520 error message later. */
10521 if (decl_context
!= PARM
)
10523 type
= check_var_type (unqualified_id
, type
);
10524 if (type
== error_mark_node
)
10525 return error_mark_node
;
10528 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10529 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10531 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10533 if (ctype
|| in_namespace
)
10534 error ("cannot use %<::%> in parameter declaration");
10536 if (type_uses_auto (type
))
10538 if (cxx_dialect
>= cxx14
)
10539 error ("%<auto%> parameter not permitted in this context");
10541 error ("parameter declared %<auto%>");
10542 type
= error_mark_node
;
10545 /* A parameter declared as an array of T is really a pointer to T.
10546 One declared as a function is really a pointer to a function.
10547 One declared as a member is really a pointer to member. */
10549 if (TREE_CODE (type
) == ARRAY_TYPE
)
10551 /* Transfer const-ness of array into that of type pointed to. */
10552 type
= build_pointer_type (TREE_TYPE (type
));
10553 type_quals
= TYPE_UNQUALIFIED
;
10554 array_parameter_p
= true;
10556 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10557 type
= build_pointer_type (type
);
10560 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10561 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10563 cp_cv_quals real_quals
= memfn_quals
;
10564 if (cxx_dialect
< cxx14
&& constexpr_p
10565 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10566 real_quals
|= TYPE_QUAL_CONST
;
10567 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10573 if (decl_context
== PARM
)
10575 decl
= cp_build_parm_decl (unqualified_id
, type
);
10576 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10578 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10579 memfn_quals
!= TYPE_UNQUALIFIED
,
10580 inlinep
, friendp
, raises
!= NULL_TREE
);
10582 else if (decl_context
== FIELD
)
10584 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10585 && type_uses_auto (type
))
10587 error ("non-static data member declared %<auto%>");
10588 type
= error_mark_node
;
10591 /* The C99 flexible array extension. */
10592 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10593 && TYPE_DOMAIN (type
) == NULL_TREE
)
10595 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10596 tf_warning_or_error
);
10597 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10600 if (type
== error_mark_node
)
10602 /* Happens when declaring arrays of sizes which
10603 are error_mark_node, for example. */
10606 else if (in_namespace
&& !friendp
)
10608 /* Something like struct S { int N::j; }; */
10609 error ("invalid use of %<::%>");
10610 return error_mark_node
;
10612 else if (TREE_CODE (type
) == FUNCTION_TYPE
10613 || TREE_CODE (type
) == METHOD_TYPE
)
10616 tree function_context
;
10620 /* This should never happen in pure C++ (the check
10621 could be an assert). It could happen in
10622 Objective-C++ if someone writes invalid code that
10623 uses a function declaration for an instance
10624 variable or property (instance variables and
10625 properties are parsed as FIELD_DECLs, but they are
10626 part of an Objective-C class, not a C++ class).
10627 That code is invalid and is caught by this
10631 error ("declaration of function %qD in invalid context",
10633 return error_mark_node
;
10636 /* ``A union may [ ... ] not [ have ] virtual functions.''
10638 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10640 error ("function %qD declared virtual inside a union",
10642 return error_mark_node
;
10645 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10649 error ("%qD cannot be declared virtual, since it "
10650 "is always static",
10657 /* Check that the name used for a destructor makes sense. */
10658 if (sfk
== sfk_destructor
)
10660 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10664 gcc_assert (friendp
);
10665 error ("expected qualified name in friend declaration "
10666 "for destructor %qD", uqname
);
10667 return error_mark_node
;
10670 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10672 error ("declaration of %qD as member of %qT",
10674 return error_mark_node
;
10678 error ("a destructor cannot be %<constexpr%>");
10679 return error_mark_node
;
10682 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10684 error ("expected qualified name in friend declaration "
10685 "for constructor %qD",
10686 id_declarator
->u
.id
.unqualified_name
);
10687 return error_mark_node
;
10690 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10691 function_context
= (ctype
!= NULL_TREE
) ?
10692 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10693 publicp
= (! friendp
|| ! staticp
)
10694 && function_context
== NULL_TREE
;
10696 if (late_return_type_p
)
10697 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10699 decl
= grokfndecl (ctype
, type
,
10700 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10701 ? unqualified_id
: dname
,
10704 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10705 friendp
? -1 : 0, friendp
, publicp
,
10706 inlinep
| (2 * constexpr_p
),
10708 funcdef_flag
, template_count
, in_namespace
,
10709 attrlist
, declarator
->id_loc
);
10710 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10711 if (decl
== NULL_TREE
)
10712 return error_mark_node
;
10714 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10715 /* The decl and setting of decl_attr is also turned off. */
10716 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10719 /* [class.conv.ctor]
10721 A constructor declared without the function-specifier
10722 explicit that can be called with a single parameter
10723 specifies a conversion from the type of its first
10724 parameter to the type of its class. Such a constructor
10725 is called a converting constructor. */
10726 if (explicitp
== 2)
10727 DECL_NONCONVERTING_P (decl
) = 1;
10729 else if (!staticp
&& !dependent_type_p (type
)
10730 && !COMPLETE_TYPE_P (complete_type (type
))
10731 && (TREE_CODE (type
) != ARRAY_TYPE
10732 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10733 || initialized
== 0))
10735 if (unqualified_id
)
10737 error ("field %qD has incomplete type %qT",
10738 unqualified_id
, type
);
10739 cxx_incomplete_type_inform (strip_array_types (type
));
10742 error ("name %qT has incomplete type", type
);
10744 type
= error_mark_node
;
10751 error ("%qE is neither function nor member function; "
10752 "cannot be declared friend", unqualified_id
);
10760 /* Friends are treated specially. */
10761 if (ctype
== current_class_type
)
10762 ; /* We already issued a permerror. */
10763 else if (decl
&& DECL_NAME (decl
))
10765 if (template_class_depth (current_class_type
) == 0)
10767 decl
= check_explicit_specialization
10768 (unqualified_id
, decl
, template_count
,
10769 2 * funcdef_flag
+ 4);
10770 if (decl
== error_mark_node
)
10771 return error_mark_node
;
10774 decl
= do_friend (ctype
, unqualified_id
, decl
,
10780 return error_mark_node
;
10783 /* Structure field. It may not be a function, except for C++. */
10785 if (decl
== NULL_TREE
)
10789 /* C++ allows static class members. All other work
10790 for this is done by grokfield. */
10791 decl
= build_lang_decl_loc (declarator
10792 ? declarator
->id_loc
10794 VAR_DECL
, unqualified_id
, type
);
10795 set_linkage_for_static_data_member (decl
);
10796 /* Even if there is an in-class initialization, DECL
10797 is considered undefined until an out-of-class
10798 definition is provided. */
10799 DECL_EXTERNAL (decl
) = 1;
10803 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10804 if (declspecs
->gnu_thread_keyword_p
)
10805 DECL_GNU_TLS_P (decl
) = true;
10808 if (constexpr_p
&& !initialized
)
10810 error ("constexpr static data member %qD must have an "
10811 "initializer", decl
);
10812 constexpr_p
= false;
10819 error ("non-static data member %qE declared %<constexpr%>",
10821 constexpr_p
= false;
10823 decl
= build_decl (input_location
,
10824 FIELD_DECL
, unqualified_id
, type
);
10825 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10826 if (bitfield
&& !unqualified_id
)
10827 TREE_NO_WARNING (decl
) = 1;
10829 if (storage_class
== sc_mutable
)
10831 DECL_MUTABLE_P (decl
) = 1;
10832 storage_class
= sc_none
;
10837 /* An attempt is being made to initialize a non-static
10838 member. This is new in C++11. */
10839 maybe_warn_cpp0x (CPP0X_NSDMI
);
10841 /* If this has been parsed with static storage class, but
10842 errors forced staticp to be cleared, ensure NSDMI is
10844 if (declspecs
->storage_class
== sc_static
)
10845 DECL_INITIAL (decl
) = error_mark_node
;
10849 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10850 memfn_quals
!= TYPE_UNQUALIFIED
,
10851 inlinep
, friendp
, raises
!= NULL_TREE
);
10854 else if (TREE_CODE (type
) == FUNCTION_TYPE
10855 || TREE_CODE (type
) == METHOD_TYPE
)
10857 tree original_name
;
10860 if (!unqualified_id
)
10861 return error_mark_node
;
10863 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10864 original_name
= dname
;
10866 original_name
= unqualified_id
;
10868 if (storage_class
== sc_auto
)
10869 error ("storage class %<auto%> invalid for function %qs", name
);
10870 else if (storage_class
== sc_register
)
10871 error ("storage class %<register%> invalid for function %qs", name
);
10874 if (declspecs
->gnu_thread_keyword_p
)
10875 error ("storage class %<__thread%> invalid for function %qs",
10878 error ("storage class %<thread_local%> invalid for function %qs",
10882 if (virt_specifiers
)
10883 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10884 /* Function declaration not at top level.
10885 Storage classes other than `extern' are not allowed
10886 and `extern' makes no difference. */
10887 if (! toplevel_bindings_p ()
10888 && (storage_class
== sc_static
10889 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10892 if (storage_class
== sc_static
)
10893 pedwarn (input_location
, OPT_Wpedantic
,
10894 "%<static%> specified invalid for function %qs "
10895 "declared out of global scope", name
);
10897 pedwarn (input_location
, OPT_Wpedantic
,
10898 "%<inline%> specifier invalid for function %qs "
10899 "declared out of global scope", name
);
10902 if (ctype
== NULL_TREE
)
10906 error ("virtual non-class function %qs", name
);
10909 else if (sfk
== sfk_constructor
10910 || sfk
== sfk_destructor
)
10912 error (funcdef_flag
10913 ? G_("%qs defined in a non-class scope")
10914 : G_("%qs declared in a non-class scope"), name
);
10919 /* Record whether the function is public. */
10920 publicp
= (ctype
!= NULL_TREE
10921 || storage_class
!= sc_static
);
10923 if (late_return_type_p
)
10924 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10926 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10927 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10929 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10931 template_count
, in_namespace
, attrlist
,
10932 declarator
->id_loc
);
10933 if (decl
== NULL_TREE
)
10934 return error_mark_node
;
10938 int invalid_static
= 0;
10940 /* Don't allow a static member function in a class, and forbid
10941 declaring main to be static. */
10942 if (TREE_CODE (type
) == METHOD_TYPE
)
10944 permerror (input_location
, "cannot declare member function %qD to have "
10945 "static linkage", decl
);
10946 invalid_static
= 1;
10948 else if (current_function_decl
)
10950 /* FIXME need arm citation */
10951 error ("cannot declare static function inside another function");
10952 invalid_static
= 1;
10955 if (invalid_static
)
10958 storage_class
= sc_none
;
10964 /* It's a variable. */
10966 /* An uninitialized decl with `extern' is a reference. */
10967 decl
= grokvardecl (type
, dname
, unqualified_id
,
10970 (type_quals
& TYPE_QUAL_CONST
) != 0,
10972 ctype
? ctype
: in_namespace
);
10973 if (decl
== NULL_TREE
)
10974 return error_mark_node
;
10976 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10977 memfn_quals
!= TYPE_UNQUALIFIED
,
10978 inlinep
, friendp
, raises
!= NULL_TREE
);
10982 DECL_CONTEXT (decl
) = ctype
;
10985 permerror (input_location
, "%<static%> may not be used when defining "
10986 "(as opposed to declaring) a static data member");
10988 storage_class
= sc_none
;
10990 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10992 error ("static member %qD declared %<register%>", decl
);
10993 storage_class
= sc_none
;
10995 if (storage_class
== sc_extern
&& pedantic
)
10997 pedwarn (input_location
, OPT_Wpedantic
,
10998 "cannot explicitly declare member %q#D to have "
10999 "extern linkage", decl
);
11000 storage_class
= sc_none
;
11003 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11005 error ("declaration of constexpr variable %qD is not a definition",
11007 constexpr_p
= false;
11011 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11013 if (toplevel_bindings_p ())
11015 /* It's common practice (and completely valid) to have a const
11016 be initialized and declared extern. */
11017 if (!(type_quals
& TYPE_QUAL_CONST
))
11018 warning (0, "%qs initialized and declared %<extern%>", name
);
11022 error ("%qs has both %<extern%> and initializer", name
);
11023 return error_mark_node
;
11027 /* Record `register' declaration for warnings on &
11028 and in case doing stupid register allocation. */
11030 if (storage_class
== sc_register
)
11031 DECL_REGISTER (decl
) = 1;
11032 else if (storage_class
== sc_extern
)
11033 DECL_THIS_EXTERN (decl
) = 1;
11034 else if (storage_class
== sc_static
)
11035 DECL_THIS_STATIC (decl
) = 1;
11037 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11038 if (constexpr_p
&& VAR_P (decl
))
11039 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11041 /* Record constancy and volatility on the DECL itself . There's
11042 no need to do this when processing a template; we'll do this
11043 for the instantiated declaration based on the type of DECL. */
11044 if (!processing_template_decl
)
11045 cp_apply_type_quals_to_decl (type_quals
, decl
);
11051 /* Subroutine of start_function. Ensure that each of the parameter
11052 types (as listed in PARMS) is complete, as is required for a
11053 function definition. */
11056 require_complete_types_for_parms (tree parms
)
11058 for (; parms
; parms
= DECL_CHAIN (parms
))
11060 if (dependent_type_p (TREE_TYPE (parms
)))
11062 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11063 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11065 relayout_decl (parms
);
11066 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11069 /* grokparms or complete_type_or_else will have already issued
11071 TREE_TYPE (parms
) = error_mark_node
;
11075 /* Returns nonzero if T is a local variable. */
11078 local_variable_p (const_tree t
)
11081 /* A VAR_DECL with a context that is a _TYPE is a static data
11083 && !TYPE_P (CP_DECL_CONTEXT (t
))
11084 /* Any other non-local variable must be at namespace scope. */
11085 && !DECL_NAMESPACE_SCOPE_P (t
))
11086 || (TREE_CODE (t
) == PARM_DECL
))
11092 /* Like local_variable_p, but suitable for use as a tree-walking
11096 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11099 if (local_variable_p (*tp
)
11100 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11102 else if (TYPE_P (*tp
))
11103 *walk_subtrees
= 0;
11108 /* Check that ARG, which is a default-argument expression for a
11109 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11110 something goes wrong. DECL may also be a _TYPE node, rather than a
11111 DECL, if there is no DECL available. */
11114 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11119 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11120 /* We get a DEFAULT_ARG when looking at an in-class declaration
11121 with a default argument. Ignore the argument for now; we'll
11122 deal with it after the class is complete. */
11131 decl_type
= TREE_TYPE (decl
);
11133 if (arg
== error_mark_node
11134 || decl
== error_mark_node
11135 || TREE_TYPE (arg
) == error_mark_node
11136 || decl_type
== error_mark_node
)
11137 /* Something already went wrong. There's no need to check
11139 return error_mark_node
;
11141 /* [dcl.fct.default]
11143 A default argument expression is implicitly converted to the
11145 ++cp_unevaluated_operand
;
11146 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11148 --cp_unevaluated_operand
;
11150 if (warn_zero_as_null_pointer_constant
11151 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11152 && null_ptr_cst_p (arg
)
11153 && (complain
& tf_warning
)
11154 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11155 return nullptr_node
;
11157 /* [dcl.fct.default]
11159 Local variables shall not be used in default argument
11162 The keyword `this' shall not be used in a default argument of a
11163 member function. */
11164 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11167 if (complain
& tf_warning_or_error
)
11169 if (DECL_NAME (var
) == this_identifier
)
11170 permerror (input_location
, "default argument %qE uses %qD",
11173 error ("default argument %qE uses local variable %qD", arg
, var
);
11175 return error_mark_node
;
11182 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11185 type_is_deprecated (tree type
)
11187 enum tree_code code
;
11188 if (TREE_DEPRECATED (type
))
11190 if (TYPE_NAME (type
)
11191 && TREE_DEPRECATED (TYPE_NAME (type
)))
11194 /* Do warn about using typedefs to a deprecated class. */
11195 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11196 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11198 code
= TREE_CODE (type
);
11200 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11201 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11202 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11203 return type_is_deprecated (TREE_TYPE (type
));
11205 if (TYPE_PTRMEMFUNC_P (type
))
11206 return type_is_deprecated
11207 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11212 /* Decode the list of parameter types for a function type.
11213 Given the list of things declared inside the parens,
11214 return a list of types.
11216 If this parameter does not end with an ellipsis, we append
11219 *PARMS is set to the chain of PARM_DECLs created. */
11222 grokparms (tree parmlist
, tree
*parms
)
11224 tree result
= NULL_TREE
;
11225 tree decls
= NULL_TREE
;
11229 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11231 tree type
= NULL_TREE
;
11232 tree init
= TREE_PURPOSE (parm
);
11233 tree decl
= TREE_VALUE (parm
);
11234 const char *errmsg
;
11236 if (parm
== void_list_node
)
11239 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11242 type
= TREE_TYPE (decl
);
11243 if (VOID_TYPE_P (type
))
11245 if (same_type_p (type
, void_type_node
)
11247 && !DECL_NAME (decl
) && !result
11248 && TREE_CHAIN (parm
) == void_list_node
)
11249 /* DR 577: A parameter list consisting of a single
11250 unnamed parameter of non-dependent type 'void'. */
11252 else if (cv_qualified_p (type
))
11253 error_at (DECL_SOURCE_LOCATION (decl
),
11254 "invalid use of cv-qualified type %qT in "
11255 "parameter declaration", type
);
11257 error_at (DECL_SOURCE_LOCATION (decl
),
11258 "invalid use of type %<void%> in parameter "
11260 /* It's not a good idea to actually create parameters of
11261 type `void'; other parts of the compiler assume that a
11262 void type terminates the parameter list. */
11263 type
= error_mark_node
;
11264 TREE_TYPE (decl
) = error_mark_node
;
11267 if (type
!= error_mark_node
11268 && TYPE_FOR_JAVA (type
)
11269 && MAYBE_CLASS_TYPE_P (type
))
11271 error ("parameter %qD has Java class type", decl
);
11272 type
= error_mark_node
;
11273 TREE_TYPE (decl
) = error_mark_node
;
11277 if (type
!= error_mark_node
11278 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11281 type
= error_mark_node
;
11282 TREE_TYPE (decl
) = error_mark_node
;
11285 if (type
!= error_mark_node
)
11287 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11289 tree deptype
= type_is_deprecated (type
);
11291 warn_deprecated_use (deptype
, NULL_TREE
);
11294 /* Top-level qualifiers on the parameters are
11295 ignored for function types. */
11296 type
= cp_build_qualified_type (type
, 0);
11297 if (TREE_CODE (type
) == METHOD_TYPE
)
11299 error ("parameter %qD invalidly declared method type", decl
);
11300 type
= build_pointer_type (type
);
11301 TREE_TYPE (decl
) = type
;
11303 else if (abstract_virtuals_error (decl
, type
))
11304 any_error
= 1; /* Seems like a good idea. */
11305 else if (POINTER_TYPE_P (type
))
11307 /* [dcl.fct]/6, parameter types cannot contain pointers
11308 (references) to arrays of unknown bound. */
11309 tree t
= TREE_TYPE (type
);
11310 int ptr
= TYPE_PTR_P (type
);
11314 if (TYPE_PTR_P (t
))
11316 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11318 else if (!TYPE_DOMAIN (t
))
11322 if (TREE_CODE (t
) == ARRAY_TYPE
)
11324 ? G_("parameter %qD includes pointer to array of "
11325 "unknown bound %qT")
11326 : G_("parameter %qD includes reference to array of "
11327 "unknown bound %qT"),
11333 else if (init
&& !processing_template_decl
)
11334 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11337 DECL_CHAIN (decl
) = decls
;
11339 result
= tree_cons (init
, type
, result
);
11341 decls
= nreverse (decls
);
11342 result
= nreverse (result
);
11344 result
= chainon (result
, void_list_node
);
11351 /* D is a constructor or overloaded `operator='.
11353 Let T be the class in which D is declared. Then, this function
11356 -1 if D's is an ill-formed constructor or copy assignment operator
11357 whose first parameter is of type `T'.
11358 0 if D is not a copy constructor or copy assignment
11360 1 if D is a copy constructor or copy assignment operator whose
11361 first parameter is a reference to non-const qualified T.
11362 2 if D is a copy constructor or copy assignment operator whose
11363 first parameter is a reference to const qualified T.
11365 This function can be used as a predicate. Positive values indicate
11366 a copy constructor and nonzero values indicate a copy assignment
11370 copy_fn_p (const_tree d
)
11376 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11378 if (TREE_CODE (d
) == TEMPLATE_DECL
11379 || (DECL_TEMPLATE_INFO (d
)
11380 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11381 /* Instantiations of template member functions are never copy
11382 functions. Note that member functions of templated classes are
11383 represented as template functions internally, and we must
11384 accept those as copy functions. */
11387 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11391 arg_type
= TREE_VALUE (args
);
11392 if (arg_type
== error_mark_node
)
11395 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11397 /* Pass by value copy assignment operator. */
11400 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11401 && !TYPE_REF_IS_RVALUE (arg_type
)
11402 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11404 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11410 args
= TREE_CHAIN (args
);
11412 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11413 /* There are more non-optional args. */
11419 /* D is a constructor or overloaded `operator='.
11421 Let T be the class in which D is declared. Then, this function
11422 returns true when D is a move constructor or move assignment
11423 operator, false otherwise. */
11426 move_fn_p (const_tree d
)
11428 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11430 if (cxx_dialect
== cxx98
)
11431 /* There are no move constructors if we are in C++98 mode. */
11434 if (TREE_CODE (d
) == TEMPLATE_DECL
11435 || (DECL_TEMPLATE_INFO (d
)
11436 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11437 /* Instantiations of template member functions are never move
11438 functions. Note that member functions of templated classes are
11439 represented as template functions internally, and we must
11440 accept those as move functions. */
11443 return move_signature_fn_p (d
);
11446 /* D is a constructor or overloaded `operator='.
11448 Then, this function returns true when D has the same signature as a move
11449 constructor or move assignment operator (because either it is such a
11450 ctor/op= or it is a template specialization with the same signature),
11451 false otherwise. */
11454 move_signature_fn_p (const_tree d
)
11458 bool result
= false;
11460 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11464 arg_type
= TREE_VALUE (args
);
11465 if (arg_type
== error_mark_node
)
11468 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11469 && TYPE_REF_IS_RVALUE (arg_type
)
11470 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11474 args
= TREE_CHAIN (args
);
11476 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11477 /* There are more non-optional args. */
11483 /* Remember any special properties of member function DECL. */
11486 grok_special_member_properties (tree decl
)
11490 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11493 class_type
= DECL_CONTEXT (decl
);
11494 if (DECL_CONSTRUCTOR_P (decl
))
11496 int ctor
= copy_fn_p (decl
);
11498 if (!DECL_ARTIFICIAL (decl
))
11499 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11505 A non-template constructor for class X is a copy
11506 constructor if its first parameter is of type X&, const
11507 X&, volatile X& or const volatile X&, and either there
11508 are no other parameters or else all other parameters have
11509 default arguments. */
11510 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11511 if (user_provided_p (decl
))
11512 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11514 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11516 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11517 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11518 else if (move_fn_p (decl
) && user_provided_p (decl
))
11519 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11520 else if (is_list_ctor (decl
))
11521 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11523 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11524 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11525 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11527 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11531 A non-template assignment operator for class X is a copy
11532 assignment operator if its parameter is of type X, X&, const
11533 X&, volatile X& or const volatile X&. */
11535 int assop
= copy_fn_p (decl
);
11539 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11540 if (user_provided_p (decl
))
11541 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11543 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11545 else if (move_fn_p (decl
) && user_provided_p (decl
))
11546 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11548 /* Destructors are handled in check_methods. */
11551 /* Check a constructor DECL has the correct form. Complains
11552 if the class has a constructor of the form X(X). */
11555 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11557 int ctor_parm
= copy_fn_p (decl
);
11563 A declaration of a constructor for a class X is ill-formed if
11564 its first parameter is of type (optionally cv-qualified) X
11565 and either there are no other parameters or else all other
11566 parameters have default arguments.
11568 We *don't* complain about member template instantiations that
11569 have this form, though; they can occur as we try to decide
11570 what constructor to use during overload resolution. Since
11571 overload resolution will never prefer such a constructor to
11572 the non-template copy constructor (which is either explicitly
11573 or implicitly defined), there's no need to worry about their
11574 existence. Theoretically, they should never even be
11575 instantiated, but that's hard to forestall. */
11576 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11584 /* An operator with this code is unary, but can also be binary. */
11587 ambi_op_p (enum tree_code code
)
11589 return (code
== INDIRECT_REF
11590 || code
== ADDR_EXPR
11591 || code
== UNARY_PLUS_EXPR
11592 || code
== NEGATE_EXPR
11593 || code
== PREINCREMENT_EXPR
11594 || code
== PREDECREMENT_EXPR
);
11597 /* An operator with this name can only be unary. */
11600 unary_op_p (enum tree_code code
)
11602 return (code
== TRUTH_NOT_EXPR
11603 || code
== BIT_NOT_EXPR
11604 || code
== COMPONENT_REF
11605 || code
== TYPE_EXPR
);
11608 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11609 errors are issued for invalid declarations. */
11612 grok_op_properties (tree decl
, bool complain
)
11614 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11616 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11617 tree name
= DECL_NAME (decl
);
11618 enum tree_code operator_code
;
11623 /* Count the number of arguments and check for ellipsis. */
11624 for (argtype
= argtypes
, arity
= 0;
11625 argtype
&& argtype
!= void_list_node
;
11626 argtype
= TREE_CHAIN (argtype
))
11628 ellipsis_p
= !argtype
;
11630 class_type
= DECL_CONTEXT (decl
);
11631 if (class_type
&& !CLASS_TYPE_P (class_type
))
11632 class_type
= NULL_TREE
;
11634 if (DECL_CONV_FN_P (decl
))
11635 operator_code
= TYPE_EXPR
;
11639 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11640 if (ansi_opname (CODE) == name) \
11642 operator_code = (CODE); \
11645 else if (ansi_assopname (CODE) == name) \
11647 operator_code = (CODE); \
11648 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11652 #include "operators.def"
11653 #undef DEF_OPERATOR
11655 gcc_unreachable ();
11658 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11659 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11662 switch (operator_code
)
11665 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11669 TYPE_GETS_DELETE (class_type
) |= 1;
11673 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11676 case VEC_DELETE_EXPR
:
11677 TYPE_GETS_DELETE (class_type
) |= 2;
11684 /* [basic.std.dynamic.allocation]/1:
11686 A program is ill-formed if an allocation function is declared
11687 in a namespace scope other than global scope or declared static
11690 The same also holds true for deallocation functions. */
11691 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11692 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11694 if (DECL_NAMESPACE_SCOPE_P (decl
))
11696 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11698 error ("%qD may not be declared within a namespace", decl
);
11701 else if (!TREE_PUBLIC (decl
))
11703 error ("%qD may not be declared as static", decl
);
11709 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11711 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11712 DECL_IS_OPERATOR_NEW (decl
) = 1;
11714 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11715 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11718 /* An operator function must either be a non-static member function
11719 or have at least one parameter of a class, a reference to a class,
11720 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11721 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11723 if (operator_code
== TYPE_EXPR
11724 || operator_code
== CALL_EXPR
11725 || operator_code
== COMPONENT_REF
11726 || operator_code
== ARRAY_REF
11727 || operator_code
== NOP_EXPR
)
11729 error ("%qD must be a nonstatic member function", decl
);
11736 if (DECL_STATIC_FUNCTION_P (decl
))
11738 error ("%qD must be either a non-static member "
11739 "function or a non-member function", decl
);
11743 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11745 tree arg
= non_reference (TREE_VALUE (p
));
11746 if (arg
== error_mark_node
)
11749 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11750 because these checks are performed even on
11751 template functions. */
11752 if (MAYBE_CLASS_TYPE_P (arg
)
11753 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11757 if (!p
|| p
== void_list_node
)
11760 error ("%qD must have an argument of class or "
11761 "enumerated type", decl
);
11767 /* There are no restrictions on the arguments to an overloaded
11769 if (operator_code
== CALL_EXPR
)
11772 /* Warn about conversion operators that will never be used. */
11773 if (IDENTIFIER_TYPENAME_P (name
)
11774 && ! DECL_TEMPLATE_INFO (decl
)
11776 /* Warn only declaring the function; there is no need to
11777 warn again about out-of-class definitions. */
11778 && class_type
== current_class_type
)
11780 tree t
= TREE_TYPE (name
);
11781 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11784 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11786 if (VOID_TYPE_P (t
))
11787 warning (OPT_Wconversion
,
11789 ? G_("conversion to a reference to void "
11790 "will never use a type conversion operator")
11791 : G_("conversion to void "
11792 "will never use a type conversion operator"));
11793 else if (class_type
)
11795 if (t
== class_type
)
11796 warning (OPT_Wconversion
,
11798 ? G_("conversion to a reference to the same type "
11799 "will never use a type conversion operator")
11800 : G_("conversion to the same type "
11801 "will never use a type conversion operator"));
11802 /* Don't force t to be complete here. */
11803 else if (MAYBE_CLASS_TYPE_P (t
)
11804 && COMPLETE_TYPE_P (t
)
11805 && DERIVED_FROM_P (t
, class_type
))
11806 warning (OPT_Wconversion
,
11808 ? G_("conversion to a reference to a base class "
11809 "will never use a type conversion operator")
11810 : G_("conversion to a base class "
11811 "will never use a type conversion operator"));
11816 if (operator_code
== COND_EXPR
)
11819 error ("ISO C++ prohibits overloading operator ?:");
11822 else if (ellipsis_p
)
11824 error ("%qD must not have variable number of arguments", decl
);
11827 else if (ambi_op_p (operator_code
))
11830 /* We pick the one-argument operator codes by default, so
11831 we don't have to change anything. */
11833 else if (arity
== 2)
11835 /* If we thought this was a unary operator, we now know
11836 it to be a binary operator. */
11837 switch (operator_code
)
11840 operator_code
= MULT_EXPR
;
11844 operator_code
= BIT_AND_EXPR
;
11847 case UNARY_PLUS_EXPR
:
11848 operator_code
= PLUS_EXPR
;
11852 operator_code
= MINUS_EXPR
;
11855 case PREINCREMENT_EXPR
:
11856 operator_code
= POSTINCREMENT_EXPR
;
11859 case PREDECREMENT_EXPR
:
11860 operator_code
= POSTDECREMENT_EXPR
;
11864 gcc_unreachable ();
11867 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11869 if ((operator_code
== POSTINCREMENT_EXPR
11870 || operator_code
== POSTDECREMENT_EXPR
)
11871 && ! processing_template_decl
11872 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11875 error ("postfix %qD must take %<int%> as its argument",
11878 error ("postfix %qD must take %<int%> as its second "
11886 error ("%qD must take either zero or one argument", decl
);
11888 error ("%qD must take either one or two arguments", decl
);
11892 /* More Effective C++ rule 6. */
11894 && (operator_code
== POSTINCREMENT_EXPR
11895 || operator_code
== POSTDECREMENT_EXPR
11896 || operator_code
== PREINCREMENT_EXPR
11897 || operator_code
== PREDECREMENT_EXPR
))
11899 tree arg
= TREE_VALUE (argtypes
);
11900 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11901 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11902 arg
= TREE_TYPE (arg
);
11903 arg
= TYPE_MAIN_VARIANT (arg
);
11904 if (operator_code
== PREINCREMENT_EXPR
11905 || operator_code
== PREDECREMENT_EXPR
)
11907 if (TREE_CODE (ret
) != REFERENCE_TYPE
11908 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11910 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11911 build_reference_type (arg
));
11915 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11916 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11920 else if (unary_op_p (operator_code
))
11925 error ("%qD must take %<void%>", decl
);
11927 error ("%qD must take exactly one argument", decl
);
11931 else /* if (binary_op_p (operator_code)) */
11936 error ("%qD must take exactly one argument", decl
);
11938 error ("%qD must take exactly two arguments", decl
);
11942 /* More Effective C++ rule 7. */
11944 && (operator_code
== TRUTH_ANDIF_EXPR
11945 || operator_code
== TRUTH_ORIF_EXPR
11946 || operator_code
== COMPOUND_EXPR
))
11947 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11951 /* Effective C++ rule 23. */
11954 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11955 && (operator_code
== PLUS_EXPR
11956 || operator_code
== MINUS_EXPR
11957 || operator_code
== TRUNC_DIV_EXPR
11958 || operator_code
== MULT_EXPR
11959 || operator_code
== TRUNC_MOD_EXPR
)
11960 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11961 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11963 /* [over.oper]/8 */
11964 for (; argtypes
&& argtypes
!= void_list_node
;
11965 argtypes
= TREE_CHAIN (argtypes
))
11966 if (TREE_PURPOSE (argtypes
))
11968 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11969 if (operator_code
== POSTINCREMENT_EXPR
11970 || operator_code
== POSTDECREMENT_EXPR
)
11972 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11977 error ("%qD cannot have default arguments", decl
);
11985 /* Return a string giving the keyword associate with CODE. */
11987 static const char *
11988 tag_name (enum tag_types code
)
12000 case typename_type
:
12003 gcc_unreachable ();
12007 /* Name lookup in an elaborated-type-specifier (after the keyword
12008 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12009 elaborated-type-specifier is invalid, issue a diagnostic and return
12010 error_mark_node; otherwise, return the *_TYPE to which it referred.
12011 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12014 check_elaborated_type_specifier (enum tag_types tag_code
,
12016 bool allow_template_p
)
12022 struct S { struct S *p; };
12024 name lookup will find the TYPE_DECL for the implicit "S::S"
12025 typedef. Adjust for that here. */
12026 if (DECL_SELF_REFERENCE_P (decl
))
12027 decl
= TYPE_NAME (TREE_TYPE (decl
));
12029 type
= TREE_TYPE (decl
);
12031 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12032 is false for this case as well. */
12033 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12035 error ("using template type parameter %qT after %qs",
12036 type
, tag_name (tag_code
));
12037 return error_mark_node
;
12039 /* Accept template template parameters. */
12040 else if (allow_template_p
12041 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12042 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12046 If the identifier resolves to a typedef-name or the
12047 simple-template-id resolves to an alias template
12048 specialization, the elaborated-type-specifier is ill-formed.
12050 In other words, the only legitimate declaration to use in the
12051 elaborated type specifier is the implicit typedef created when
12052 the type is declared. */
12053 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12054 && !DECL_SELF_REFERENCE_P (decl
)
12055 && tag_code
!= typename_type
)
12057 if (alias_template_specialization_p (type
))
12058 error ("using alias template specialization %qT after %qs",
12059 type
, tag_name (tag_code
));
12061 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12062 inform (DECL_SOURCE_LOCATION (decl
),
12063 "%qD has a previous declaration here", decl
);
12064 return error_mark_node
;
12066 else if (TREE_CODE (type
) != RECORD_TYPE
12067 && TREE_CODE (type
) != UNION_TYPE
12068 && tag_code
!= enum_type
12069 && tag_code
!= typename_type
)
12071 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12072 inform (input_location
, "%q+T has a previous declaration here", type
);
12073 return error_mark_node
;
12075 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12076 && tag_code
== enum_type
)
12078 error ("%qT referred to as enum", type
);
12079 inform (input_location
, "%q+T has a previous declaration here", type
);
12080 return error_mark_node
;
12082 else if (!allow_template_p
12083 && TREE_CODE (type
) == RECORD_TYPE
12084 && CLASSTYPE_IS_TEMPLATE (type
))
12086 /* If a class template appears as elaborated type specifier
12087 without a template header such as:
12089 template <class T> class C {};
12090 void f(class C); // No template header here
12092 then the required template argument is missing. */
12093 error ("template argument required for %<%s %T%>",
12094 tag_name (tag_code
),
12095 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12096 return error_mark_node
;
12102 /* Lookup NAME in elaborate type specifier in scope according to
12103 SCOPE and issue diagnostics if necessary.
12104 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12105 found, and ERROR_MARK_NODE for type error. */
12108 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12109 tag_scope scope
, bool template_header_p
)
12113 if (scope
== ts_global
)
12115 /* First try ordinary name lookup, ignoring hidden class name
12116 injected via friend declaration. */
12117 decl
= lookup_name_prefer_type (name
, 2);
12118 /* If that fails, the name will be placed in the smallest
12119 non-class, non-function-prototype scope according to 3.3.1/5.
12120 We may already have a hidden name declared as friend in this
12121 scope. So lookup again but not ignoring hidden names.
12122 If we find one, that name will be made visible rather than
12123 creating a new tag. */
12125 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12128 decl
= lookup_type_scope (name
, scope
);
12131 && (DECL_CLASS_TEMPLATE_P (decl
)
12132 /* If scope is ts_current we're defining a class, so ignore a
12133 template template parameter. */
12134 || (scope
!= ts_current
12135 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12136 decl
= DECL_TEMPLATE_RESULT (decl
);
12138 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12140 /* Look for invalid nested type:
12144 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12146 error ("%qD has the same name as the class in which it is "
12149 return error_mark_node
;
12152 /* Two cases we need to consider when deciding if a class
12153 template is allowed as an elaborated type specifier:
12154 1. It is a self reference to its own class.
12155 2. It comes with a template header.
12159 template <class T> class C {
12160 class C *c1; // DECL_SELF_REFERENCE_P is true
12163 template <class U> class C; // template_header_p is true
12164 template <class T> class C<T>::D {
12165 class C *c2; // DECL_SELF_REFERENCE_P is true
12168 t
= check_elaborated_type_specifier (tag_code
,
12171 | DECL_SELF_REFERENCE_P (decl
));
12174 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12176 error ("reference to %qD is ambiguous", name
);
12177 print_candidates (decl
);
12178 return error_mark_node
;
12184 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12185 Define the tag as a forward-reference if it is not defined.
12187 If a declaration is given, process it here, and report an error if
12188 multiple declarations are not identical.
12190 SCOPE is TS_CURRENT when this is also a definition. Only look in
12191 the current frame for the name (since C++ allows new names in any
12192 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12193 declaration. Only look beginning from the current scope outward up
12194 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12196 TEMPLATE_HEADER_P is true when this declaration is preceded by
12197 a set of template parameters. */
12200 xref_tag_1 (enum tag_types tag_code
, tree name
,
12201 tag_scope orig_scope
, bool template_header_p
)
12203 enum tree_code code
;
12205 tree context
= NULL_TREE
;
12208 gcc_assert (identifier_p (name
));
12214 code
= RECORD_TYPE
;
12220 code
= ENUMERAL_TYPE
;
12223 gcc_unreachable ();
12226 if (orig_scope
== ts_lambda
)
12227 scope
= ts_current
;
12229 scope
= orig_scope
;
12231 /* In case of anonymous name, xref_tag is only called to
12232 make type node and push name. Name lookup is not required. */
12233 if (ANON_AGGRNAME_P (name
))
12236 t
= lookup_and_check_tag (tag_code
, name
,
12237 scope
, template_header_p
);
12239 if (t
== error_mark_node
)
12240 return error_mark_node
;
12242 if (scope
!= ts_current
&& t
&& current_class_type
12243 && template_class_depth (current_class_type
)
12244 && template_header_p
)
12246 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12249 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12250 definition of this tag. Since, in addition, we are currently
12251 processing a (member) template declaration of a template
12252 class, we must be very careful; consider:
12259 { template <class V>
12260 friend struct S1; };
12262 Here, the S2::S1 declaration should not be confused with the
12263 outer declaration. In particular, the inner version should
12264 have a template parameter of level 2, not level 1. This
12265 would be particularly important if the member declaration
12268 template <class V = U> friend struct S1;
12270 say, when we should tsubst into `U' when instantiating
12271 S2. On the other hand, when presented with:
12281 we must find the inner binding eventually. We
12282 accomplish this by making sure that the new type we
12283 create to represent this declaration has the right
12285 context
= TYPE_CONTEXT (t
);
12291 /* If no such tag is yet defined, create a forward-reference node
12292 and record it as the "definition".
12293 When a real declaration of this type is found,
12294 the forward-reference will be altered into a real type. */
12295 if (code
== ENUMERAL_TYPE
)
12297 error ("use of enum %q#D without previous declaration", name
);
12298 return error_mark_node
;
12302 t
= make_class_type (code
);
12303 TYPE_CONTEXT (t
) = context
;
12304 if (orig_scope
== ts_lambda
)
12305 /* Remember that we're declaring a lambda to avoid bogus errors
12306 in push_template_decl. */
12307 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12308 t
= pushtag (name
, t
, scope
);
12313 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12315 if (!redeclare_class_template (t
, current_template_parms
))
12316 return error_mark_node
;
12318 else if (!processing_template_decl
12319 && CLASS_TYPE_P (t
)
12320 && CLASSTYPE_IS_TEMPLATE (t
))
12322 error ("redeclaration of %qT as a non-template", t
);
12323 error ("previous declaration %q+D", t
);
12324 return error_mark_node
;
12327 /* Make injected friend class visible. */
12328 if (scope
!= ts_within_enclosing_non_class
12329 && hidden_name_p (TYPE_NAME (t
)))
12331 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12332 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12334 if (TYPE_TEMPLATE_INFO (t
))
12336 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12337 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12345 /* Wrapper for xref_tag_1. */
12348 xref_tag (enum tag_types tag_code
, tree name
,
12349 tag_scope scope
, bool template_header_p
)
12353 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12354 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12355 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12361 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12363 enum tag_types tag_kind
;
12365 if (TREE_CODE (old
) == RECORD_TYPE
)
12366 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12368 tag_kind
= union_type
;
12370 if (id
== NULL_TREE
)
12371 id
= TYPE_IDENTIFIER (old
);
12373 return xref_tag (tag_kind
, id
, scope
, false);
12376 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12377 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12378 access_* node, and the TREE_VALUE is the type of the base-class.
12379 Non-NULL TREE_TYPE indicates virtual inheritance.
12381 Returns true if the binfo hierarchy was successfully created,
12382 false if an error was detected. */
12385 xref_basetypes (tree ref
, tree base_list
)
12388 tree binfo
, base_binfo
;
12389 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12390 unsigned max_bases
= 0; /* Maximum direct bases. */
12392 tree default_access
;
12393 tree igo_prev
; /* Track Inheritance Graph Order. */
12395 if (ref
== error_mark_node
)
12398 /* The base of a derived class is private by default, all others are
12400 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12401 && CLASSTYPE_DECLARED_CLASS (ref
)
12402 ? access_private_node
: access_public_node
);
12404 /* First, make sure that any templates in base-classes are
12405 instantiated. This ensures that if we call ourselves recursively
12406 we do not get confused about which classes are marked and which
12408 basep
= &base_list
;
12411 tree basetype
= TREE_VALUE (*basep
);
12413 /* The dependent_type_p call below should really be dependent_scope_p
12414 so that we give a hard error about using an incomplete type as a
12415 base, but we allow it with a pedwarn for backward
12417 if (processing_template_decl
12418 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12419 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12420 if (!dependent_type_p (basetype
)
12421 && !complete_type_or_else (basetype
, NULL
))
12422 /* An incomplete type. Remove it from the list. */
12423 *basep
= TREE_CHAIN (*basep
);
12427 if (TREE_TYPE (*basep
))
12429 if (CLASS_TYPE_P (basetype
))
12430 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12431 basep
= &TREE_CHAIN (*basep
);
12435 TYPE_MARKED_P (ref
) = 1;
12437 /* The binfo slot should be empty, unless this is an (ill-formed)
12439 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12441 error ("redefinition of %q#T", ref
);
12445 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12447 binfo
= make_tree_binfo (max_bases
);
12449 TYPE_BINFO (ref
) = binfo
;
12450 BINFO_OFFSET (binfo
) = size_zero_node
;
12451 BINFO_TYPE (binfo
) = ref
;
12453 /* Apply base-class info set up to the variants of this type. */
12454 fixup_type_variants (ref
);
12458 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12459 /* An aggregate cannot have baseclasses. */
12460 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12462 if (TREE_CODE (ref
) == UNION_TYPE
)
12464 error ("derived union %qT invalid", ref
);
12471 if (TYPE_FOR_JAVA (ref
))
12473 error ("Java class %qT cannot have multiple bases", ref
);
12480 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12482 if (TYPE_FOR_JAVA (ref
))
12484 error ("Java class %qT cannot have virtual bases", ref
);
12489 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12491 tree access
= TREE_PURPOSE (base_list
);
12492 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12493 tree basetype
= TREE_VALUE (base_list
);
12495 if (access
== access_default_node
)
12496 access
= default_access
;
12498 if (PACK_EXPANSION_P (basetype
))
12499 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12500 if (TREE_CODE (basetype
) == TYPE_DECL
)
12501 basetype
= TREE_TYPE (basetype
);
12502 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12504 error ("base type %qT fails to be a struct or class type",
12509 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12510 TYPE_FOR_JAVA (ref
) = 1;
12512 base_binfo
= NULL_TREE
;
12513 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12515 base_binfo
= TYPE_BINFO (basetype
);
12516 /* The original basetype could have been a typedef'd type. */
12517 basetype
= BINFO_TYPE (base_binfo
);
12519 /* Inherit flags from the base. */
12520 TYPE_HAS_NEW_OPERATOR (ref
)
12521 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12522 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12523 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12524 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12525 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12526 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12527 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12528 CLASSTYPE_REPEATED_BASE_P (ref
)
12529 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12532 /* We must do this test after we've seen through a typedef
12534 if (TYPE_MARKED_P (basetype
))
12536 if (basetype
== ref
)
12537 error ("recursive type %qT undefined", basetype
);
12539 error ("duplicate base type %qT invalid", basetype
);
12543 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12544 /* Regenerate the pack expansion for the bases. */
12545 basetype
= make_pack_expansion (basetype
);
12547 TYPE_MARKED_P (basetype
) = 1;
12549 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12550 &igo_prev
, via_virtual
);
12551 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12552 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12554 BINFO_BASE_APPEND (binfo
, base_binfo
);
12555 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12558 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12559 /* If we didn't get max_vbases vbases, we must have shared at
12560 least one of them, and are therefore diamond shaped. */
12561 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12563 /* Unmark all the types. */
12564 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12565 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12566 TYPE_MARKED_P (ref
) = 0;
12568 /* Now see if we have a repeated base type. */
12569 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12571 for (base_binfo
= binfo
; base_binfo
;
12572 base_binfo
= TREE_CHAIN (base_binfo
))
12574 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12576 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12579 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12581 for (base_binfo
= binfo
; base_binfo
;
12582 base_binfo
= TREE_CHAIN (base_binfo
))
12583 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12584 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12593 /* Copies the enum-related properties from type SRC to type DST.
12594 Used with the underlying type of an enum and the enum itself. */
12596 copy_type_enum (tree dst
, tree src
)
12599 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12601 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12602 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12603 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12604 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12605 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12606 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12607 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12608 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12609 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12613 /* Begin compiling the definition of an enumeration type.
12616 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12618 UNDERLYING_TYPE is the type that will be used as the storage for
12619 the enumeration type. This should be NULL_TREE if no storage type
12622 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12624 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12626 Returns the type object, as yet incomplete.
12627 Also records info about it so that build_enumerator
12628 may be used to declare the individual values as they are read. */
12631 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12632 bool scoped_enum_p
, bool *is_new
)
12634 tree prevtype
= NULL_TREE
;
12635 gcc_assert (identifier_p (name
));
12639 /* [C++0x dcl.enum]p5:
12641 If not explicitly specified, the underlying type of a scoped
12642 enumeration type is int. */
12643 if (!underlying_type
&& scoped_enum_p
)
12644 underlying_type
= integer_type_node
;
12646 if (underlying_type
)
12647 underlying_type
= cv_unqualified (underlying_type
);
12649 /* If this is the real definition for a previous forward reference,
12650 fill in the contents in the same object that used to be the
12651 forward reference. */
12653 enumtype
= lookup_and_check_tag (enum_type
, name
,
12654 /*tag_scope=*/ts_current
,
12655 /*template_header_p=*/false);
12657 /* In case of a template_decl, the only check that should be deferred
12658 to instantiation time is the comparison of underlying types. */
12659 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12661 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12663 error_at (input_location
, "scoped/unscoped mismatch "
12664 "in enum %q#T", enumtype
);
12665 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12666 "previous definition here");
12667 enumtype
= error_mark_node
;
12669 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12671 error_at (input_location
, "underlying type mismatch "
12672 "in enum %q#T", enumtype
);
12673 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12674 "previous definition here");
12675 enumtype
= error_mark_node
;
12677 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12678 && !dependent_type_p (underlying_type
)
12679 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12680 && !same_type_p (underlying_type
,
12681 ENUM_UNDERLYING_TYPE (enumtype
)))
12683 error_at (input_location
, "different underlying type "
12684 "in enum %q#T", enumtype
);
12685 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12686 "previous definition here");
12687 underlying_type
= NULL_TREE
;
12691 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12692 || processing_template_decl
)
12694 /* In case of error, make a dummy enum to allow parsing to
12696 if (enumtype
== error_mark_node
)
12698 name
= make_anon_name ();
12699 enumtype
= NULL_TREE
;
12702 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12703 of an opaque enum, or an opaque enum of an already defined
12704 enumeration (C++0x only).
12705 In any other case, it'll be NULL_TREE. */
12711 prevtype
= enumtype
;
12713 /* Do not push the decl more than once, unless we need to
12714 compare underlying types at instantiation time */
12716 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12717 || (underlying_type
12718 && dependent_type_p (underlying_type
))
12719 || (ENUM_UNDERLYING_TYPE (enumtype
)
12720 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12722 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12723 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12726 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12729 if (enumtype
== error_mark_node
)
12730 return error_mark_node
;
12732 /* The enum is considered opaque until the opening '{' of the
12733 enumerator list. */
12734 SET_OPAQUE_ENUM_P (enumtype
, true);
12735 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12738 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12740 if (underlying_type
)
12742 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12744 copy_type_enum (enumtype
, underlying_type
);
12745 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12747 else if (dependent_type_p (underlying_type
))
12748 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12750 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12751 underlying_type
, enumtype
);
12754 /* If into a template class, the returned enum is always the first
12755 declaration (opaque or not) seen. This way all the references to
12756 this type will be to the same declaration. The following ones are used
12757 only to check for definition errors. */
12758 if (prevtype
&& processing_template_decl
)
12764 /* After processing and defining all the values of an enumeration type,
12765 install their decls in the enumeration type.
12766 ENUMTYPE is the type object. */
12769 finish_enum_value_list (tree enumtype
)
12772 tree underlying_type
;
12775 tree minnode
, maxnode
;
12778 bool fixed_underlying_type_p
12779 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12781 /* We built up the VALUES in reverse order. */
12782 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12784 /* For an enum defined in a template, just set the type of the values;
12785 all further processing is postponed until the template is
12786 instantiated. We need to set the type so that tsubst of a CONST_DECL
12788 if (processing_template_decl
)
12790 for (values
= TYPE_VALUES (enumtype
);
12792 values
= TREE_CHAIN (values
))
12793 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12797 /* Determine the minimum and maximum values of the enumerators. */
12798 if (TYPE_VALUES (enumtype
))
12800 minnode
= maxnode
= NULL_TREE
;
12802 for (values
= TYPE_VALUES (enumtype
);
12804 values
= TREE_CHAIN (values
))
12806 decl
= TREE_VALUE (values
);
12808 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12809 each enumerator has the type of its enumeration. Prior to the
12810 closing brace, the type of each enumerator is the type of its
12811 initializing value. */
12812 TREE_TYPE (decl
) = enumtype
;
12814 /* Update the minimum and maximum values, if appropriate. */
12815 value
= DECL_INITIAL (decl
);
12816 if (value
== error_mark_node
)
12817 value
= integer_zero_node
;
12818 /* Figure out what the minimum and maximum values of the
12819 enumerators are. */
12821 minnode
= maxnode
= value
;
12822 else if (tree_int_cst_lt (maxnode
, value
))
12824 else if (tree_int_cst_lt (value
, minnode
))
12831 If the enumerator-list is empty, the underlying type is as if
12832 the enumeration had a single enumerator with value 0. */
12833 minnode
= maxnode
= integer_zero_node
;
12835 if (!fixed_underlying_type_p
)
12837 /* Compute the number of bits require to represent all values of the
12838 enumeration. We must do this before the type of MINNODE and
12839 MAXNODE are transformed, since tree_int_cst_min_precision relies
12840 on the TREE_TYPE of the value it is passed. */
12841 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12842 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12843 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12844 int precision
= MAX (lowprec
, highprec
);
12846 bool use_short_enum
;
12848 /* Determine the underlying type of the enumeration.
12852 The underlying type of an enumeration is an integral type that
12853 can represent all the enumerator values defined in the
12854 enumeration. It is implementation-defined which integral type is
12855 used as the underlying type for an enumeration except that the
12856 underlying type shall not be larger than int unless the value of
12857 an enumerator cannot fit in an int or unsigned int.
12859 We use "int" or an "unsigned int" as the underlying type, even if
12860 a smaller integral type would work, unless the user has
12861 explicitly requested that we use the smallest possible type. The
12862 user can request that for all enumerations with a command line
12863 flag, or for just one enumeration with an attribute. */
12865 use_short_enum
= flag_short_enums
12866 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12868 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12872 underlying_type
= integer_types
[itk
];
12873 if (underlying_type
!= NULL_TREE
12874 && TYPE_PRECISION (underlying_type
) >= precision
12875 && TYPE_SIGN (underlying_type
) == sgn
)
12878 if (itk
== itk_none
)
12882 IF no integral type can represent all the enumerator values, the
12883 enumeration is ill-formed. */
12884 error ("no integral type can represent all of the enumerator values "
12885 "for %qT", enumtype
);
12886 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12887 underlying_type
= integer_types
[itk_unsigned_long_long
];
12892 The value of sizeof() applied to an enumeration type, an object
12893 of an enumeration type, or an enumerator, is the value of sizeof()
12894 applied to the underlying type. */
12895 copy_type_enum (enumtype
, underlying_type
);
12897 /* Compute the minimum and maximum values for the type.
12901 For an enumeration where emin is the smallest enumerator and emax
12902 is the largest, the values of the enumeration are the values of the
12903 underlying type in the range bmin to bmax, where bmin and bmax are,
12904 respectively, the smallest and largest values of the smallest bit-
12905 field that can store emin and emax. */
12907 /* The middle-end currently assumes that types with TYPE_PRECISION
12908 narrower than their underlying type are suitably zero or sign
12909 extended to fill their mode. Similarly, it assumes that the front
12910 end assures that a value of a particular type must be within
12911 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12913 We used to set these fields based on bmin and bmax, but that led
12914 to invalid assumptions like optimizing away bounds checking. So
12915 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12916 TYPE_MAX_VALUE to the values for the mode above and only restrict
12917 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12918 ENUM_UNDERLYING_TYPE (enumtype
)
12919 = build_distinct_type_copy (underlying_type
);
12920 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12921 set_min_and_max_values_for_integral_type
12922 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12924 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12925 if (flag_strict_enums
)
12926 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12929 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12931 /* Convert each of the enumerators to the type of the underlying
12932 type of the enumeration. */
12933 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12935 location_t saved_location
;
12937 decl
= TREE_VALUE (values
);
12938 saved_location
= input_location
;
12939 input_location
= DECL_SOURCE_LOCATION (decl
);
12940 if (fixed_underlying_type_p
)
12941 /* If the enumeration type has a fixed underlying type, we
12942 already checked all of the enumerator values. */
12943 value
= DECL_INITIAL (decl
);
12945 value
= perform_implicit_conversion (underlying_type
,
12946 DECL_INITIAL (decl
),
12947 tf_warning_or_error
);
12948 input_location
= saved_location
;
12950 /* Do not clobber shared ints. */
12951 value
= copy_node (value
);
12953 TREE_TYPE (value
) = enumtype
;
12954 DECL_INITIAL (decl
) = value
;
12957 /* Fix up all variant types of this enum type. */
12958 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12959 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12961 if (at_class_scope_p ()
12962 && COMPLETE_TYPE_P (current_class_type
)
12963 && UNSCOPED_ENUM_P (enumtype
))
12964 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12965 current_class_type
);
12967 /* Finish debugging output for this type. */
12968 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12971 /* Finishes the enum type. This is called only the first time an
12972 enumeration is seen, be it opaque or odinary.
12973 ENUMTYPE is the type object. */
12976 finish_enum (tree enumtype
)
12978 if (processing_template_decl
)
12980 if (at_function_scope_p ())
12981 add_stmt (build_min (TAG_DEFN
, enumtype
));
12985 /* If this is a forward declaration, there should not be any variants,
12986 though we can get a variant in the middle of an enum-specifier with
12987 wacky code like 'enum E { e = sizeof(const E*) };' */
12988 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12989 && (TYPE_VALUES (enumtype
)
12990 || !TYPE_NEXT_VARIANT (enumtype
)));
12993 /* Build and install a CONST_DECL for an enumeration constant of the
12994 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12995 LOC is the location of NAME.
12996 Assignment of sequential values by default is handled here. */
12999 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
13005 /* scalar_constant_value will pull out this expression, so make sure
13006 it's folded as appropriate. */
13007 if (processing_template_decl
)
13008 value
= fold_non_dependent_expr (value
);
13010 /* If the VALUE was erroneous, pretend it wasn't there; that will
13011 result in the enum being assigned the next value in sequence. */
13012 if (value
== error_mark_node
)
13015 /* Remove no-op casts from the value. */
13017 STRIP_TYPE_NOPS (value
);
13019 if (! processing_template_decl
)
13021 /* Validate and default VALUE. */
13022 if (value
!= NULL_TREE
)
13024 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13026 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13031 else if (! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13032 value
= perform_implicit_conversion_flags
13033 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13034 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13036 if (value
== error_mark_node
)
13039 if (value
!= NULL_TREE
)
13041 value
= cxx_constant_value (value
);
13043 if (TREE_CODE (value
) != INTEGER_CST
13044 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13046 error ("enumerator value for %qD is not an integer constant",
13053 /* Default based on previous value. */
13054 if (value
== NULL_TREE
)
13056 if (TYPE_VALUES (enumtype
))
13061 /* C++03 7.2/4: If no initializer is specified for the first
13062 enumerator, the type is an unspecified integral
13063 type. Otherwise the type is the same as the type of the
13064 initializing value of the preceding enumerator unless the
13065 incremented value is not representable in that type, in
13066 which case the type is an unspecified integral type
13067 sufficient to contain the incremented value. */
13068 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13069 if (error_operand_p (prev_value
))
13070 value
= error_mark_node
;
13073 tree type
= TREE_TYPE (prev_value
);
13074 signop sgn
= TYPE_SIGN (type
);
13075 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13079 bool pos
= !wi::neg_p (wi
, sgn
);
13080 if (!wi::fits_to_tree_p (wi
, type
))
13083 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13085 type
= integer_types
[itk
];
13086 if (type
!= NULL_TREE
13087 && (pos
|| !TYPE_UNSIGNED (type
))
13088 && wi::fits_to_tree_p (wi
, type
))
13091 if (type
&& cxx_dialect
< cxx11
13092 && itk
> itk_unsigned_long
)
13093 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13094 incremented enumerator value is too large for %<unsigned long%>" : "\
13095 incremented enumerator value is too large for %<long%>");
13097 if (type
== NULL_TREE
)
13100 value
= wide_int_to_tree (type
, wi
);
13105 error ("overflow in enumeration values at %qD", name
);
13106 value
= error_mark_node
;
13111 value
= integer_zero_node
;
13114 /* Remove no-op casts from the value. */
13115 STRIP_TYPE_NOPS (value
);
13117 /* If the underlying type of the enum is fixed, check whether
13118 the enumerator values fits in the underlying type. If it
13119 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13120 if (ENUM_UNDERLYING_TYPE (enumtype
)
13122 && TREE_CODE (value
) == INTEGER_CST
)
13124 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13125 error ("enumerator value %E is outside the range of underlying "
13126 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13128 /* Convert the value to the appropriate type. */
13129 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13133 /* C++ associates enums with global, function, or class declarations. */
13134 context
= current_scope ();
13136 /* Build the actual enumeration constant. Note that the enumeration
13137 constants have the underlying type of the enum (if it is fixed)
13138 or the type of their initializer (if the underlying type of the
13139 enum is not fixed):
13143 If the underlying type is fixed, the type of each enumerator
13144 prior to the closing brace is the underlying type; if the
13145 initializing value of an enumerator cannot be represented by
13146 the underlying type, the program is ill-formed. If the
13147 underlying type is not fixed, the type of each enumerator is
13148 the type of its initializing value.
13150 If the underlying type is not fixed, it will be computed by
13151 finish_enum and we will reset the type of this enumerator. Of
13152 course, if we're processing a template, there may be no value. */
13153 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13155 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13157 DECL_CONTEXT (decl
) = enumtype
;
13158 TREE_CONSTANT (decl
) = 1;
13159 TREE_READONLY (decl
) = 1;
13160 DECL_INITIAL (decl
) = value
;
13162 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13163 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13164 on the TYPE_FIELDS list for `S'. (That's so that you can say
13165 things like `S::i' later.) */
13166 finish_member_declaration (decl
);
13170 /* Add this enumeration constant to the list for this type. */
13171 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13174 /* Look for an enumerator with the given NAME within the enumeration
13175 type ENUMTYPE. This routine is used primarily for qualified name
13176 lookup into an enumerator in C++0x, e.g.,
13178 enum class Color { Red, Green, Blue };
13180 Color color = Color::Red;
13182 Returns the value corresponding to the enumerator, or
13183 NULL_TREE if no such enumerator was found. */
13185 lookup_enumerator (tree enumtype
, tree name
)
13188 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13190 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13191 return e
? TREE_VALUE (e
) : NULL_TREE
;
13195 /* We're defining DECL. Make sure that its type is OK. */
13198 check_function_type (tree decl
, tree current_function_parms
)
13200 tree fntype
= TREE_TYPE (decl
);
13201 tree return_type
= complete_type (TREE_TYPE (fntype
));
13203 /* In a function definition, arg types must be complete. */
13204 require_complete_types_for_parms (current_function_parms
);
13206 if (dependent_type_p (return_type
)
13207 || type_uses_auto (return_type
))
13209 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13210 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13212 tree args
= TYPE_ARG_TYPES (fntype
);
13214 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13215 error ("return type %q#T is incomplete", return_type
);
13217 error ("return type has Java class type %q#T", return_type
);
13219 /* Make it return void instead. */
13220 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13221 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13223 TREE_CHAIN (args
));
13225 fntype
= build_function_type (void_type_node
, args
);
13227 = build_exception_variant (fntype
,
13228 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13229 fntype
= (cp_build_type_attribute_variant
13230 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13231 TREE_TYPE (decl
) = fntype
;
13234 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13237 /* Create the FUNCTION_DECL for a function definition.
13238 DECLSPECS and DECLARATOR are the parts of the declaration;
13239 they describe the function's name and the type it returns,
13240 but twisted together in a fashion that parallels the syntax of C.
13242 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13243 DECLARATOR is really the DECL for the function we are about to
13244 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13245 indicating that the function is an inline defined in-class.
13247 This function creates a binding context for the function body
13248 as well as setting up the FUNCTION_DECL in current_function_decl.
13250 For C++, we must first check whether that datum makes any sense.
13251 For example, "class A local_a(1,2);" means that variable local_a
13252 is an aggregate of type A, which should have a constructor
13253 applied to it with the argument list [1, 2].
13255 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13256 or may be a BLOCK if the function has been defined previously
13257 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13258 error_mark_node if the function has never been defined, or
13259 a BLOCK if the function has been defined somewhere. */
13262 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13264 tree ctype
= NULL_TREE
;
13267 int doing_friend
= 0;
13268 cp_binding_level
*bl
;
13269 tree current_function_parms
;
13270 struct c_fileinfo
*finfo
13271 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13272 bool honor_interface
;
13274 /* Sanity check. */
13275 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13276 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13278 fntype
= TREE_TYPE (decl1
);
13279 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13280 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13282 /* ISO C++ 11.4/5. A friend function defined in a class is in
13283 the (lexical) scope of the class in which it is defined. */
13284 if (!ctype
&& DECL_FRIEND_P (decl1
))
13286 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13288 /* CTYPE could be null here if we're dealing with a template;
13289 for example, `inline friend float foo()' inside a template
13290 will have no CTYPE set. */
13291 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13297 if (DECL_DECLARED_INLINE_P (decl1
)
13298 && lookup_attribute ("noinline", attrs
))
13299 warning (0, "inline function %q+D given attribute noinline", decl1
);
13301 /* Handle gnu_inline attribute. */
13302 if (GNU_INLINE_P (decl1
))
13304 DECL_EXTERNAL (decl1
) = 1;
13305 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13306 DECL_INTERFACE_KNOWN (decl1
) = 1;
13307 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13310 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13311 /* This is a constructor, we must ensure that any default args
13312 introduced by this definition are propagated to the clones
13313 now. The clones are used directly in overload resolution. */
13314 adjust_clone_args (decl1
);
13316 /* Sometimes we don't notice that a function is a static member, and
13317 build a METHOD_TYPE for it. Fix that up now. */
13318 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13319 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13321 /* Set up current_class_type, and enter the scope of the class, if
13324 push_nested_class (ctype
);
13325 else if (DECL_STATIC_FUNCTION_P (decl1
))
13326 push_nested_class (DECL_CONTEXT (decl1
));
13328 /* Now that we have entered the scope of the class, we must restore
13329 the bindings for any template parameters surrounding DECL1, if it
13330 is an inline member template. (Order is important; consider the
13331 case where a template parameter has the same name as a field of
13332 the class.) It is not until after this point that
13333 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13334 if (flags
& SF_INCLASS_INLINE
)
13335 maybe_begin_member_template_processing (decl1
);
13337 /* Effective C++ rule 15. */
13339 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13340 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13341 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13343 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13344 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13345 if (!DECL_INITIAL (decl1
))
13346 DECL_INITIAL (decl1
) = error_mark_node
;
13348 /* This function exists in static storage.
13349 (This does not mean `static' in the C sense!) */
13350 TREE_STATIC (decl1
) = 1;
13352 /* We must call push_template_decl after current_class_type is set
13353 up. (If we are processing inline definitions after exiting a
13354 class scope, current_class_type will be NULL_TREE until set above
13355 by push_nested_class.) */
13356 if (processing_template_decl
)
13358 tree newdecl1
= push_template_decl (decl1
);
13359 if (newdecl1
== error_mark_node
)
13361 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13362 pop_nested_class ();
13368 /* We are now in the scope of the function being defined. */
13369 current_function_decl
= decl1
;
13371 /* Save the parm names or decls from this function's declarator
13372 where store_parm_decls will find them. */
13373 current_function_parms
= DECL_ARGUMENTS (decl1
);
13375 /* Make sure the parameter and return types are reasonable. When
13376 you declare a function, these types can be incomplete, but they
13377 must be complete when you define the function. */
13378 check_function_type (decl1
, current_function_parms
);
13380 /* Build the return declaration for the function. */
13381 restype
= TREE_TYPE (fntype
);
13383 if (DECL_RESULT (decl1
) == NULL_TREE
)
13387 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13388 DECL_ARTIFICIAL (resdecl
) = 1;
13389 DECL_IGNORED_P (resdecl
) = 1;
13390 DECL_RESULT (decl1
) = resdecl
;
13392 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13395 /* Let the user know we're compiling this function. */
13396 announce_function (decl1
);
13398 /* Record the decl so that the function name is defined.
13399 If we already have a decl for this name, and it is a FUNCTION_DECL,
13400 use the old decl. */
13401 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13403 /* A specialization is not used to guide overload resolution. */
13404 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13405 && !(DECL_USE_TEMPLATE (decl1
) &&
13406 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13408 tree olddecl
= pushdecl (decl1
);
13410 if (olddecl
== error_mark_node
)
13411 /* If something went wrong when registering the declaration,
13412 use DECL1; we have to have a FUNCTION_DECL to use when
13413 parsing the body of the function. */
13417 /* Otherwise, OLDDECL is either a previous declaration
13418 of the same function or DECL1 itself. */
13420 if (warn_missing_declarations
13421 && olddecl
== decl1
13422 && !DECL_MAIN_P (decl1
)
13423 && TREE_PUBLIC (decl1
)
13424 && !DECL_DECLARED_INLINE_P (decl1
))
13428 /* Check whether DECL1 is in an anonymous
13430 for (context
= DECL_CONTEXT (decl1
);
13432 context
= DECL_CONTEXT (context
))
13434 if (TREE_CODE (context
) == NAMESPACE_DECL
13435 && DECL_NAME (context
) == NULL_TREE
)
13439 if (context
== NULL
)
13440 warning (OPT_Wmissing_declarations
,
13441 "no previous declaration for %q+D", decl1
);
13449 /* We need to set the DECL_CONTEXT. */
13450 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13451 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13453 fntype
= TREE_TYPE (decl1
);
13454 restype
= TREE_TYPE (fntype
);
13456 /* If #pragma weak applies, mark the decl appropriately now.
13457 The pragma only applies to global functions. Because
13458 determining whether or not the #pragma applies involves
13459 computing the mangled name for the declaration, we cannot
13460 apply the pragma until after we have merged this declaration
13461 with any previous declarations; if the original declaration
13462 has a linkage specification, that specification applies to
13463 the definition as well, and may affect the mangled name. */
13464 if (DECL_FILE_SCOPE_P (decl1
))
13465 maybe_apply_pragma_weak (decl1
);
13468 /* Reset this in case the call to pushdecl changed it. */
13469 current_function_decl
= decl1
;
13471 gcc_assert (DECL_INITIAL (decl1
));
13473 /* This function may already have been parsed, in which case just
13474 return; our caller will skip over the body without parsing. */
13475 if (DECL_INITIAL (decl1
) != error_mark_node
)
13478 /* Initialize RTL machinery. We cannot do this until
13479 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13480 even when processing a template; this is how we get
13481 CFUN set up, and our per-function variables initialized.
13482 FIXME factor out the non-RTL stuff. */
13483 bl
= current_binding_level
;
13484 allocate_struct_function (decl1
, processing_template_decl
);
13486 /* Initialize the language data structures. Whenever we start
13487 a new function, we destroy temporaries in the usual way. */
13488 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13489 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13490 current_binding_level
= bl
;
13492 if (!processing_template_decl
&& type_uses_auto (restype
))
13494 FNDECL_USED_AUTO (decl1
) = true;
13495 current_function_auto_return_pattern
= restype
;
13498 /* Start the statement-tree, start the tree now. */
13499 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13501 /* If we are (erroneously) defining a function that we have already
13502 defined before, wipe out what we knew before. */
13503 if (!DECL_PENDING_INLINE_P (decl1
))
13504 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13506 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13508 /* We know that this was set up by `grokclassfn'. We do not
13509 wait until `store_parm_decls', since evil parse errors may
13510 never get us to that point. Here we keep the consistency
13511 between `current_class_type' and `current_class_ptr'. */
13512 tree t
= DECL_ARGUMENTS (decl1
);
13514 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13515 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13517 cp_function_chain
->x_current_class_ref
13518 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13519 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13520 cp_function_chain
->x_current_class_ptr
= t
;
13522 /* Constructors and destructors need to know whether they're "in
13523 charge" of initializing virtual base classes. */
13524 t
= DECL_CHAIN (t
);
13525 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13527 current_in_charge_parm
= t
;
13528 t
= DECL_CHAIN (t
);
13530 if (DECL_HAS_VTT_PARM_P (decl1
))
13532 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13533 current_vtt_parm
= t
;
13537 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13538 /* Implicitly-defined methods (like the
13539 destructor for a class in which no destructor
13540 is explicitly declared) must not be defined
13541 until their definition is needed. So, we
13542 ignore interface specifications for
13543 compiler-generated functions. */
13544 && !DECL_ARTIFICIAL (decl1
));
13546 if (processing_template_decl
)
13547 /* Don't mess with interface flags. */;
13548 else if (DECL_INTERFACE_KNOWN (decl1
))
13550 tree ctx
= decl_function_context (decl1
);
13552 if (DECL_NOT_REALLY_EXTERN (decl1
))
13553 DECL_EXTERNAL (decl1
) = 0;
13555 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13556 /* This is a function in a local class in an extern inline
13557 or template function. */
13558 comdat_linkage (decl1
);
13560 /* If this function belongs to an interface, it is public.
13561 If it belongs to someone else's interface, it is also external.
13562 This only affects inlines and template instantiations. */
13563 else if (!finfo
->interface_unknown
&& honor_interface
)
13565 if (DECL_DECLARED_INLINE_P (decl1
)
13566 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13568 DECL_EXTERNAL (decl1
)
13569 = (finfo
->interface_only
13570 || (DECL_DECLARED_INLINE_P (decl1
)
13571 && ! flag_implement_inlines
13572 && !DECL_VINDEX (decl1
)));
13574 /* For WIN32 we also want to put these in linkonce sections. */
13575 maybe_make_one_only (decl1
);
13578 DECL_EXTERNAL (decl1
) = 0;
13579 DECL_INTERFACE_KNOWN (decl1
) = 1;
13580 /* If this function is in an interface implemented in this file,
13581 make sure that the back end knows to emit this function
13583 if (!DECL_EXTERNAL (decl1
))
13584 mark_needed (decl1
);
13586 else if (finfo
->interface_unknown
&& finfo
->interface_only
13587 && honor_interface
)
13589 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13590 interface, we will have both finfo->interface_unknown and
13591 finfo->interface_only set. In that case, we don't want to
13592 use the normal heuristics because someone will supply a
13593 #pragma implementation elsewhere, and deducing it here would
13594 produce a conflict. */
13595 comdat_linkage (decl1
);
13596 DECL_EXTERNAL (decl1
) = 0;
13597 DECL_INTERFACE_KNOWN (decl1
) = 1;
13598 DECL_DEFER_OUTPUT (decl1
) = 1;
13602 /* This is a definition, not a reference.
13603 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13604 if (!GNU_INLINE_P (decl1
))
13605 DECL_EXTERNAL (decl1
) = 0;
13607 if ((DECL_DECLARED_INLINE_P (decl1
)
13608 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13609 && ! DECL_INTERFACE_KNOWN (decl1
))
13610 DECL_DEFER_OUTPUT (decl1
) = 1;
13612 DECL_INTERFACE_KNOWN (decl1
) = 1;
13615 /* Determine the ELF visibility attribute for the function. We must not
13616 do this before calling "pushdecl", as we must allow "duplicate_decls"
13617 to merge any attributes appropriately. We also need to wait until
13619 if (!DECL_CLONED_FUNCTION_P (decl1
))
13620 determine_visibility (decl1
);
13622 if (!processing_template_decl
)
13623 maybe_instantiate_noexcept (decl1
);
13625 begin_scope (sk_function_parms
, decl1
);
13629 if (DECL_DESTRUCTOR_P (decl1
)
13630 || (DECL_CONSTRUCTOR_P (decl1
)
13631 && targetm
.cxx
.cdtor_returns_this ()))
13633 cdtor_label
= build_decl (input_location
,
13634 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13635 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13638 start_fname_decls ();
13640 store_parm_decls (current_function_parms
);
13646 /* Like start_preparsed_function, except that instead of a
13647 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13649 Returns true on success. If the DECLARATOR is not suitable
13650 for a function, we return false, which tells the parser to
13651 skip the entire function. */
13654 start_function (cp_decl_specifier_seq
*declspecs
,
13655 const cp_declarator
*declarator
,
13660 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13661 if (decl1
== error_mark_node
)
13663 /* If the declarator is not suitable for a function definition,
13664 cause a syntax error. */
13665 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13667 error ("invalid function declaration");
13671 if (DECL_MAIN_P (decl1
))
13672 /* main must return int. grokfndecl should have corrected it
13673 (and issued a diagnostic) if the user got it wrong. */
13674 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13675 integer_type_node
));
13677 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13680 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13684 use_eh_spec_block (tree fn
)
13686 return (flag_exceptions
&& flag_enforce_eh_specs
13687 && !processing_template_decl
13688 && !type_throw_all_p (TREE_TYPE (fn
))
13689 /* We insert the EH_SPEC_BLOCK only in the original
13690 function; then, it is copied automatically to the
13692 && !DECL_CLONED_FUNCTION_P (fn
)
13693 /* Implicitly-generated constructors and destructors have
13694 exception specifications. However, those specifications
13695 are the union of the possible exceptions specified by the
13696 constructors/destructors for bases and members, so no
13697 unallowed exception will ever reach this function. By
13698 not creating the EH_SPEC_BLOCK we save a little memory,
13699 and we avoid spurious warnings about unreachable
13701 && !DECL_DEFAULTED_FN (fn
));
13704 /* Store the parameter declarations into the current function declaration.
13705 This is called after parsing the parameter declarations, before
13706 digesting the body of the function.
13708 Also install to binding contour return value identifier, if any. */
13711 store_parm_decls (tree current_function_parms
)
13713 tree fndecl
= current_function_decl
;
13716 /* This is a chain of any other decls that came in among the parm
13717 declarations. If a parm is declared with enum {foo, bar} x;
13718 then CONST_DECLs for foo and bar are put here. */
13719 tree nonparms
= NULL_TREE
;
13721 if (current_function_parms
)
13723 /* This case is when the function was defined with an ANSI prototype.
13724 The parms already have decls, so we need not do anything here
13725 except record them as in effect
13726 and complain if any redundant old-style parm decls were written. */
13728 tree specparms
= current_function_parms
;
13731 /* Must clear this because it might contain TYPE_DECLs declared
13733 current_binding_level
->names
= NULL
;
13735 /* If we're doing semantic analysis, then we'll call pushdecl
13736 for each of these. We must do them in reverse order so that
13737 they end in the correct forward order. */
13738 specparms
= nreverse (specparms
);
13740 for (parm
= specparms
; parm
; parm
= next
)
13742 next
= DECL_CHAIN (parm
);
13743 if (TREE_CODE (parm
) == PARM_DECL
)
13745 if (DECL_NAME (parm
) == NULL_TREE
13746 || !VOID_TYPE_P (parm
))
13749 error ("parameter %qD declared void", parm
);
13753 /* If we find an enum constant or a type tag,
13754 put it aside for the moment. */
13755 TREE_CHAIN (parm
) = NULL_TREE
;
13756 nonparms
= chainon (nonparms
, parm
);
13760 /* Get the decls in their original chain order and record in the
13761 function. This is all and only the PARM_DECLs that were
13762 pushed into scope by the loop above. */
13763 DECL_ARGUMENTS (fndecl
) = getdecls ();
13766 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13768 /* Now store the final chain of decls for the arguments
13769 as the decl-chain of the current lexical scope.
13770 Put the enumerators in as well, at the front so that
13771 DECL_ARGUMENTS is not modified. */
13772 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13774 if (use_eh_spec_block (current_function_decl
))
13775 current_eh_spec_block
= begin_eh_spec_block ();
13779 /* We have finished doing semantic analysis on DECL, but have not yet
13780 generated RTL for its body. Save away our current state, so that
13781 when we want to generate RTL later we know what to do. */
13784 save_function_data (tree decl
)
13786 struct language_function
*f
;
13788 /* Save the language-specific per-function data so that we can
13789 get it back when we really expand this function. */
13790 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13793 f
= ggc_alloc
<language_function
> ();
13794 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13795 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13797 /* Clear out the bits we don't need. */
13798 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13799 f
->bindings
= NULL
;
13800 f
->x_local_names
= NULL
;
13801 f
->base
.local_typedefs
= NULL
;
13805 /* Set the return value of the constructor (if present). */
13808 finish_constructor_body (void)
13813 if (targetm
.cxx
.cdtor_returns_this ()
13814 && (! TYPE_FOR_JAVA (current_class_type
)))
13816 /* Any return from a constructor will end up here. */
13817 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13819 val
= DECL_ARGUMENTS (current_function_decl
);
13820 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13821 DECL_RESULT (current_function_decl
), val
);
13822 /* Return the address of the object. */
13823 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13824 add_stmt (exprstmt
);
13828 /* Do all the processing for the beginning of a destructor; set up the
13829 vtable pointers and cleanups for bases and members. */
13832 begin_destructor_body (void)
13834 tree compound_stmt
;
13836 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13837 issued an error message. We still want to try to process the
13838 body of the function, but initialize_vtbl_ptrs will crash if
13839 TYPE_BINFO is NULL. */
13840 if (COMPLETE_TYPE_P (current_class_type
))
13842 compound_stmt
= begin_compound_stmt (0);
13843 /* Make all virtual function table pointers in non-virtual base
13844 classes point to CURRENT_CLASS_TYPE's virtual function
13846 initialize_vtbl_ptrs (current_class_ptr
);
13847 finish_compound_stmt (compound_stmt
);
13849 /* Insert a cleanup to let the back end know that the object is dead
13850 when we exit the destructor, either normally or via exception. */
13851 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13852 tree clobber
= build_constructor (btype
, NULL
);
13853 TREE_THIS_VOLATILE (clobber
) = true;
13854 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13855 bref
= convert_from_reference (bref
);
13856 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13857 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13859 /* And insert cleanups for our bases and members so that they
13860 will be properly destroyed if we throw. */
13861 push_base_cleanups ();
13865 /* At the end of every destructor we generate code to delete the object if
13866 necessary. Do that now. */
13869 finish_destructor_body (void)
13873 /* Any return from a destructor will end up here; that way all base
13874 and member cleanups will be run when the function returns. */
13875 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13877 /* In a virtual destructor, we must call delete. */
13878 if (DECL_VIRTUAL_P (current_function_decl
))
13881 tree virtual_size
= cxx_sizeof (current_class_type
);
13885 At the point of definition of a virtual destructor (including
13886 an implicit definition), non-placement operator delete shall
13887 be looked up in the scope of the destructor's class and if
13888 found shall be accessible and unambiguous. */
13889 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13891 /*global_p=*/false,
13892 /*placement=*/NULL_TREE
,
13893 /*alloc_fn=*/NULL_TREE
,
13894 tf_warning_or_error
);
13896 if_stmt
= begin_if_stmt ();
13897 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13898 current_in_charge_parm
,
13901 finish_expr_stmt (exprstmt
);
13902 finish_then_clause (if_stmt
);
13903 finish_if_stmt (if_stmt
);
13906 if (targetm
.cxx
.cdtor_returns_this ())
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 the necessary processing for the beginning of a function body, which
13920 in this case includes member-initializers, but not the catch clauses of
13921 a function-try-block. Currently, this means opening a binding level
13922 for the member-initializers (in a ctor), member cleanups (in a dtor),
13923 and capture proxies (in a lambda operator()). */
13926 begin_function_body (void)
13930 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13933 if (processing_template_decl
)
13934 /* Do nothing now. */;
13936 /* Always keep the BLOCK node associated with the outermost pair of
13937 curly braces of a function. These are needed for correct
13938 operation of dwarfout.c. */
13939 keep_next_level (true);
13941 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13943 if (processing_template_decl
)
13944 /* Do nothing now. */;
13945 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13946 begin_destructor_body ();
13951 /* Do the processing for the end of a function body. Currently, this means
13952 closing out the cleanups for fully-constructed bases and members, and in
13953 the case of the destructor, deleting the object if desired. Again, this
13954 is only meaningful for [cd]tors, since they are the only functions where
13955 there is a significant distinction between the main body and any
13956 function catch clauses. Handling, say, main() return semantics here
13957 would be wrong, as flowing off the end of a function catch clause for
13958 main() would also need to return 0. */
13961 finish_function_body (tree compstmt
)
13963 if (compstmt
== NULL_TREE
)
13966 /* Close the block. */
13967 finish_compound_stmt (compstmt
);
13969 if (processing_template_decl
)
13970 /* Do nothing now. */;
13971 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13972 finish_constructor_body ();
13973 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13974 finish_destructor_body ();
13977 /* Given a function, returns the BLOCK corresponding to the outermost level
13978 of curly braces, skipping the artificial block created for constructor
13982 outer_curly_brace_block (tree fndecl
)
13984 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13985 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13986 /* Skip the artificial function body block. */
13987 block
= BLOCK_SUBBLOCKS (block
);
13991 /* If FNDECL is a class's key method, add the class to the list of
13992 keyed classes that should be emitted. */
13995 record_key_method_defined (tree fndecl
)
13997 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13998 && DECL_VIRTUAL_P (fndecl
)
13999 && !processing_template_decl
)
14001 tree fnclass
= DECL_CONTEXT (fndecl
);
14002 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14003 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14007 /* Subroutine of finish_function.
14008 Save the body of constexpr functions for possible
14009 future compile time evaluation. */
14012 maybe_save_function_definition (tree fun
)
14014 if (!processing_template_decl
14015 && DECL_DECLARED_CONSTEXPR_P (fun
)
14016 && !cp_function_chain
->invalid_constexpr
14017 && !DECL_CLONED_FUNCTION_P (fun
))
14018 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14021 /* Finish up a function declaration and compile that function
14022 all the way to assembler language output. The free the storage
14023 for the function definition.
14025 FLAGS is a bitwise or of the following values:
14027 We just finished processing the body of an in-class inline
14028 function definition. (This processing will have taken place
14029 after the class definition is complete.) */
14032 finish_function (int flags
)
14034 tree fndecl
= current_function_decl
;
14035 tree fntype
, ctype
= NULL_TREE
;
14036 int inclass_inline
= (flags
& 2) != 0;
14038 /* When we get some parse errors, we can end up without a
14039 current_function_decl, so cope. */
14040 if (fndecl
== NULL_TREE
)
14041 return error_mark_node
;
14043 if (c_dialect_objc ())
14044 objc_finish_function ();
14046 gcc_assert (!defer_mark_used_calls
);
14047 defer_mark_used_calls
= true;
14049 record_key_method_defined (fndecl
);
14051 fntype
= TREE_TYPE (fndecl
);
14053 /* TREE_READONLY (fndecl) = 1;
14054 This caused &foo to be of type ptr-to-const-function
14055 which then got a warning when stored in a ptr-to-function variable. */
14057 gcc_assert (building_stmt_list_p ());
14058 /* The current function is being defined, so its DECL_INITIAL should
14059 be set, and unless there's a multiple definition, it should be
14060 error_mark_node. */
14061 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14063 /* For a cloned function, we've already got all the code we need;
14064 there's no need to add any extra bits. */
14065 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14067 /* Make it so that `main' always returns 0 by default. */
14068 if (DECL_MAIN_P (current_function_decl
))
14069 finish_return_stmt (integer_zero_node
);
14071 if (use_eh_spec_block (current_function_decl
))
14072 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14073 (TREE_TYPE (current_function_decl
)),
14074 current_eh_spec_block
);
14077 /* If we're saving up tree structure, tie off the function now. */
14078 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14080 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14081 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14083 finish_fname_decls ();
14085 /* If this function can't throw any exceptions, remember that. */
14086 if (!processing_template_decl
14087 && !cp_function_chain
->can_throw
14088 && !flag_non_call_exceptions
14089 && !decl_replaceable_p (fndecl
))
14090 TREE_NOTHROW (fndecl
) = 1;
14092 /* This must come after expand_function_end because cleanups might
14093 have declarations (from inline functions) that need to go into
14094 this function's blocks. */
14096 /* If the current binding level isn't the outermost binding level
14097 for this function, either there is a bug, or we have experienced
14098 syntax errors and the statement tree is malformed. */
14099 if (current_binding_level
->kind
!= sk_function_parms
)
14101 /* Make sure we have already experienced errors. */
14102 gcc_assert (errorcount
);
14104 /* Throw away the broken statement tree and extra binding
14106 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14108 while (current_binding_level
->kind
!= sk_function_parms
)
14110 if (current_binding_level
->kind
== sk_class
)
14111 pop_nested_class ();
14113 poplevel (0, 0, 0);
14116 poplevel (1, 0, 1);
14118 /* Statements should always be full-expressions at the outermost set
14119 of curly braces for a function. */
14120 gcc_assert (stmts_are_full_exprs_p ());
14122 /* If there are no return statements in a function with auto return type,
14123 the return type is void. But if the declared type is something like
14124 auto*, this is an error. */
14125 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14126 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14128 if (!is_auto (current_function_auto_return_pattern
)
14129 && !current_function_returns_value
&& !current_function_returns_null
)
14131 error ("no return statements in function returning %qT",
14132 current_function_auto_return_pattern
);
14133 inform (input_location
, "only plain %<auto%> return type can be "
14134 "deduced to %<void%>");
14136 apply_deduced_return_type (fndecl
, void_type_node
);
14137 fntype
= TREE_TYPE (fndecl
);
14140 /* Save constexpr function body before it gets munged by
14141 the NRV transformation. */
14142 maybe_save_function_definition (fndecl
);
14144 /* Set up the named return value optimization, if we can. Candidate
14145 variables are selected in check_return_expr. */
14146 if (current_function_return_value
)
14148 tree r
= current_function_return_value
;
14151 if (r
!= error_mark_node
14152 /* This is only worth doing for fns that return in memory--and
14153 simpler, since we don't have to worry about promoted modes. */
14154 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14155 /* Only allow this for variables declared in the outer scope of
14156 the function so we know that their lifetime always ends with a
14157 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14158 we were to do this optimization in tree-ssa. */
14159 && (outer
= outer_curly_brace_block (fndecl
))
14160 && chain_member (r
, BLOCK_VARS (outer
)))
14161 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14163 current_function_return_value
= NULL_TREE
;
14166 /* Remember that we were in class scope. */
14167 if (current_class_name
)
14168 ctype
= current_class_type
;
14170 /* Must mark the RESULT_DECL as being in this function. */
14171 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14173 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14174 to the FUNCTION_DECL node itself. */
14175 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14177 /* Save away current state, if appropriate. */
14178 if (!processing_template_decl
)
14179 save_function_data (fndecl
);
14181 /* Complain if there's just no return statement. */
14182 if (warn_return_type
14183 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14184 && !dependent_type_p (TREE_TYPE (fntype
))
14185 && !current_function_returns_value
&& !current_function_returns_null
14186 /* Don't complain if we abort or throw. */
14187 && !current_function_returns_abnormally
14188 /* Don't complain if there's an infinite loop. */
14189 && !current_function_infinite_loop
14190 /* Don't complain if we are declared noreturn. */
14191 && !TREE_THIS_VOLATILE (fndecl
)
14192 && !DECL_NAME (DECL_RESULT (fndecl
))
14193 && !TREE_NO_WARNING (fndecl
)
14194 /* Structor return values (if any) are set by the compiler. */
14195 && !DECL_CONSTRUCTOR_P (fndecl
)
14196 && !DECL_DESTRUCTOR_P (fndecl
)
14197 && targetm
.warn_func_return (fndecl
))
14199 warning (OPT_Wreturn_type
,
14200 "no return statement in function returning non-void");
14201 TREE_NO_WARNING (fndecl
) = 1;
14204 /* Store the end of the function, so that we get good line number
14205 info for the epilogue. */
14206 cfun
->function_end_locus
= input_location
;
14208 /* Complain about parameters that are only set, but never otherwise used. */
14209 if (warn_unused_but_set_parameter
14210 && !processing_template_decl
14211 && errorcount
== unused_but_set_errorcount
14212 && !DECL_CLONED_FUNCTION_P (fndecl
))
14216 for (decl
= DECL_ARGUMENTS (fndecl
);
14218 decl
= DECL_CHAIN (decl
))
14219 if (TREE_USED (decl
)
14220 && TREE_CODE (decl
) == PARM_DECL
14221 && !DECL_READ_P (decl
)
14222 && DECL_NAME (decl
)
14223 && !DECL_ARTIFICIAL (decl
)
14224 && !TREE_NO_WARNING (decl
)
14225 && !DECL_IN_SYSTEM_HEADER (decl
)
14226 && TREE_TYPE (decl
) != error_mark_node
14227 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14228 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14229 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14230 warning (OPT_Wunused_but_set_parameter
,
14231 "parameter %q+D set but not used", decl
);
14232 unused_but_set_errorcount
= errorcount
;
14235 /* Complain about locally defined typedefs that are not used in this
14237 maybe_warn_unused_local_typedefs ();
14239 /* Genericize before inlining. */
14240 if (!processing_template_decl
)
14242 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14243 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14244 cp_genericize (fndecl
);
14245 /* Clear out the bits we don't need. */
14246 f
->x_current_class_ptr
= NULL
;
14247 f
->x_current_class_ref
= NULL
;
14248 f
->x_eh_spec_block
= NULL
;
14249 f
->x_in_charge_parm
= NULL
;
14250 f
->x_vtt_parm
= NULL
;
14251 f
->x_return_value
= NULL
;
14252 f
->bindings
= NULL
;
14253 f
->extern_decl_map
= NULL
;
14254 f
->infinite_loops
= NULL
;
14256 /* Clear out the bits we don't need. */
14257 local_names
= NULL
;
14259 /* We're leaving the context of this function, so zap cfun. It's still in
14260 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14262 current_function_decl
= NULL
;
14264 /* If this is an in-class inline definition, we may have to pop the
14265 bindings for the template parameters that we added in
14266 maybe_begin_member_template_processing when start_function was
14268 if (inclass_inline
)
14269 maybe_end_member_template_processing ();
14271 /* Leave the scope of the class. */
14273 pop_nested_class ();
14278 current_function_decl
= NULL_TREE
;
14280 defer_mark_used_calls
= false;
14281 if (deferred_mark_used_calls
)
14286 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14288 vec_free (deferred_mark_used_calls
);
14294 /* Create the FUNCTION_DECL for a function definition.
14295 DECLSPECS and DECLARATOR are the parts of the declaration;
14296 they describe the return type and the name of the function,
14297 but twisted together in a fashion that parallels the syntax of C.
14299 This function creates a binding context for the function body
14300 as well as setting up the FUNCTION_DECL in current_function_decl.
14302 Returns a FUNCTION_DECL on success.
14304 If the DECLARATOR is not suitable for a function (it defines a datum
14305 instead), we return 0, which tells yyparse to report a parse error.
14307 May return void_type_node indicating that this method is actually
14308 a friend. See grokfield for more details.
14310 Came here with a `.pushlevel' .
14312 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14313 CHANGES TO CODE IN `grokfield'. */
14316 grokmethod (cp_decl_specifier_seq
*declspecs
,
14317 const cp_declarator
*declarator
, tree attrlist
)
14319 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14322 if (fndecl
== error_mark_node
)
14323 return error_mark_node
;
14325 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14327 error ("invalid member function declaration");
14328 return error_mark_node
;
14332 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14334 /* Pass friends other than inline friend functions back. */
14335 if (fndecl
== void_type_node
)
14338 if (DECL_IN_AGGR_P (fndecl
))
14340 if (DECL_CLASS_SCOPE_P (fndecl
))
14341 error ("%qD is already defined in class %qT", fndecl
,
14342 DECL_CONTEXT (fndecl
));
14343 return error_mark_node
;
14346 check_template_shadow (fndecl
);
14348 DECL_COMDAT (fndecl
) = 1;
14349 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14350 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14352 /* We process method specializations in finish_struct_1. */
14353 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14355 fndecl
= push_template_decl (fndecl
);
14356 if (fndecl
== error_mark_node
)
14360 if (! DECL_FRIEND_P (fndecl
))
14362 if (DECL_CHAIN (fndecl
))
14364 fndecl
= copy_node (fndecl
);
14365 TREE_CHAIN (fndecl
) = NULL_TREE
;
14369 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14371 DECL_IN_AGGR_P (fndecl
) = 1;
14376 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14377 we can lay it out later, when and if its type becomes complete.
14379 Also handle constexpr variables where the initializer involves
14380 an unlowered PTRMEM_CST because the class isn't complete yet. */
14383 maybe_register_incomplete_var (tree var
)
14385 gcc_assert (VAR_P (var
));
14387 /* Keep track of variables with incomplete types. */
14388 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14389 && DECL_EXTERNAL (var
))
14391 tree inner_type
= TREE_TYPE (var
);
14393 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14394 inner_type
= TREE_TYPE (inner_type
);
14395 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14397 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14398 /* RTTI TD entries are created while defining the type_info. */
14399 || (TYPE_LANG_SPECIFIC (inner_type
)
14400 && TYPE_BEING_DEFINED (inner_type
)))
14402 incomplete_var iv
= {var
, inner_type
};
14403 vec_safe_push (incomplete_vars
, iv
);
14405 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14406 && decl_constant_var_p (var
)
14407 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14409 /* When the outermost open class is complete we can resolve any
14410 pointers-to-members. */
14411 tree context
= outermost_open_class ();
14412 incomplete_var iv
= {var
, context
};
14413 vec_safe_push (incomplete_vars
, iv
);
14418 /* Called when a class type (given by TYPE) is defined. If there are
14419 any existing VAR_DECLs whose type has been completed by this
14420 declaration, update them now. */
14423 complete_vars (tree type
)
14426 incomplete_var
*iv
;
14428 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14430 if (same_type_p (type
, iv
->incomplete_type
))
14432 tree var
= iv
->decl
;
14433 tree type
= TREE_TYPE (var
);
14435 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14436 == iv
->incomplete_type
)
14438 /* Complete the type of the variable. The VAR_DECL itself
14439 will be laid out in expand_expr. */
14440 complete_type (type
);
14441 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14444 if (DECL_INITIAL (var
)
14445 && decl_constant_var_p (var
))
14446 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14448 /* Remove this entry from the list. */
14449 incomplete_vars
->unordered_remove (ix
);
14455 /* Check for pending declarations which may have abstract type. */
14456 complete_type_check_abstract (type
);
14459 /* If DECL is of a type which needs a cleanup, build and return an
14460 expression to perform that cleanup here. Return NULL_TREE if no
14461 cleanup need be done. */
14464 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14470 /* Assume no cleanup is required. */
14471 cleanup
= NULL_TREE
;
14473 if (error_operand_p (decl
))
14476 /* Handle "__attribute__((cleanup))". We run the cleanup function
14477 before the destructor since the destructor is what actually
14478 terminates the lifetime of the object. */
14479 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14486 /* Get the name specified by the user for the cleanup function. */
14487 id
= TREE_VALUE (TREE_VALUE (attr
));
14488 /* Look up the name to find the cleanup function to call. It is
14489 important to use lookup_name here because that is what is
14490 used in c-common.c:handle_cleanup_attribute when performing
14491 initial checks on the attribute. Note that those checks
14492 include ensuring that the function found is not an overloaded
14493 function, or an object with an overloaded call operator,
14494 etc.; we can rely on the fact that the function found is an
14495 ordinary FUNCTION_DECL. */
14496 fn
= lookup_name (id
);
14497 arg
= build_address (decl
);
14499 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14500 if (cleanup
== error_mark_node
)
14501 return error_mark_node
;
14503 /* Handle ordinary C++ destructors. */
14504 type
= TREE_TYPE (decl
);
14505 if (type_build_dtor_call (type
))
14507 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14511 if (TREE_CODE (type
) == ARRAY_TYPE
)
14514 addr
= build_address (decl
);
14516 call
= build_delete (TREE_TYPE (addr
), addr
,
14517 sfk_complete_destructor
, flags
, 0, complain
);
14518 if (call
== error_mark_node
)
14519 cleanup
= error_mark_node
;
14520 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14521 /* Discard the call. */;
14523 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14528 /* build_delete sets the location of the destructor call to the
14529 current location, even though the destructor is going to be
14530 called later, at the end of the current scope. This can lead to
14531 a "jumpy" behaviour for users of debuggers when they step around
14532 the end of the block. So let's unset the location of the
14533 destructor call instead. */
14534 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14535 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14538 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14539 /* Treat objects with destructors as used; the destructor may do
14540 something substantive. */
14547 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14548 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14549 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14552 static_fn_type (tree memfntype
)
14557 if (TYPE_PTRMEMFUNC_P (memfntype
))
14558 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14559 if (POINTER_TYPE_P (memfntype
)
14560 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14561 memfntype
= TREE_TYPE (memfntype
);
14562 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14564 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14565 args
= TYPE_ARG_TYPES (memfntype
);
14566 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14567 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14568 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14569 fntype
= (cp_build_type_attribute_variant
14570 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14571 fntype
= (build_exception_variant
14572 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14573 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14574 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14578 /* DECL was originally constructed as a non-static member function,
14579 but turned out to be static. Update it accordingly. */
14582 revert_static_member_fn (tree decl
)
14584 tree stype
= static_fn_type (decl
);
14585 cp_cv_quals quals
= type_memfn_quals (stype
);
14586 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14588 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14589 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14591 TREE_TYPE (decl
) = stype
;
14593 if (DECL_ARGUMENTS (decl
))
14594 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14595 DECL_STATIC_FUNCTION_P (decl
) = 1;
14598 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14599 one of the language-independent trees. */
14601 enum cp_tree_node_structure_enum
14602 cp_tree_node_structure (union lang_tree_node
* t
)
14604 switch (TREE_CODE (&t
->generic
))
14606 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14607 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14608 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14609 case OVERLOAD
: return TS_CP_OVERLOAD
;
14610 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14611 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14612 case BASELINK
: return TS_CP_BASELINK
;
14613 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14614 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14615 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14616 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14617 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14618 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14619 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14620 default: return TS_CP_GENERIC
;
14624 /* Build the void_list_node (void_type_node having been created). */
14626 build_void_list_node (void)
14628 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14633 cp_missing_noreturn_ok_p (tree decl
)
14635 /* A missing noreturn is ok for the `main' function. */
14636 return DECL_MAIN_P (decl
);
14639 /* Return the decl used to identify the COMDAT group into which DECL should
14643 cxx_comdat_group (tree decl
)
14645 /* Virtual tables, construction virtual tables, and virtual table
14646 tables all go in a single COMDAT group, named after the primary
14648 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14649 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14650 /* For all other DECLs, the COMDAT group is the mangled name of the
14651 declaration itself. */
14654 while (DECL_THUNK_P (decl
))
14656 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14657 into the same section as the target function. In that case
14658 we must return target's name. */
14659 tree target
= THUNK_TARGET (decl
);
14660 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14661 && DECL_SECTION_NAME (target
) != NULL
14662 && DECL_ONE_ONLY (target
))
14672 /* Returns the return type for FN as written by the user, which may include
14673 a placeholder for a deduced return type. */
14676 fndecl_declared_return_type (tree fn
)
14678 fn
= STRIP_TEMPLATE (fn
);
14679 if (FNDECL_USED_AUTO (fn
))
14681 struct language_function
*f
= NULL
;
14682 if (DECL_STRUCT_FUNCTION (fn
))
14683 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14685 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14686 return f
->x_auto_return_pattern
;
14688 return TREE_TYPE (TREE_TYPE (fn
));
14691 /* Returns true iff DECL was declared with an auto return type and it has
14692 not yet been deduced to a real type. */
14695 undeduced_auto_decl (tree decl
)
14697 if (cxx_dialect
< cxx14
)
14699 return type_uses_auto (TREE_TYPE (decl
));
14702 /* Complain if DECL has an undeduced return type. */
14705 require_deduced_type (tree decl
)
14707 if (undeduced_auto_decl (decl
))
14708 error ("use of %qD before deduction of %<auto%>", decl
);
14711 #include "gt-cp-decl.h"