1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
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.
163 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
164 tree tinfo_var_id; */
166 tree cp_global_trees
[CPTI_MAX
];
168 /* Indicates that there is a type value in some namespace, although
169 that is not necessarily in scope at the moment. */
171 tree global_type_node
;
173 /* The node that holds the "name" of the global scope. */
174 tree global_scope_name
;
176 #define local_names cp_function_chain->x_local_names
178 /* A list of objects which have constructors or destructors
179 which reside in the global scope. The decl is stored in
180 the TREE_VALUE slot and the initializer is stored
181 in the TREE_PURPOSE slot. */
182 tree static_aggregates
;
184 /* Like static_aggregates, but for thread_local variables. */
189 /* A node for the integer constant 2. */
191 tree integer_two_node
;
193 /* Used only for jumps to as-yet undefined labels, since jumps to
194 defined labels can have their validity checked immediately. */
196 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
197 struct named_label_use_entry
*next
;
198 /* The binding level to which this entry is *currently* attached.
199 This is initially the binding level in which the goto appeared,
200 but is modified as scopes are closed. */
201 cp_binding_level
*binding_level
;
202 /* The head of the names list that was current when the goto appeared,
203 or the inner scope popped. These are the decls that will *not* be
204 skipped when jumping to the label. */
206 /* The location of the goto, for error reporting. */
207 location_t o_goto_locus
;
208 /* True if an OpenMP structured block scope has been closed since
209 the goto appeared. This means that the branch from the label will
210 illegally exit an OpenMP scope. */
214 /* A list of all LABEL_DECLs in the function that have names. Here so
215 we can clear out their names' definitions at the end of the
216 function, and so we can check the validity of jumps to these labels. */
218 struct GTY((for_user
)) named_label_entry
{
219 /* The decl itself. */
222 /* The binding level to which the label is *currently* attached.
223 This is initially set to the binding level in which the label
224 is defined, but is modified as scopes are closed. */
225 cp_binding_level
*binding_level
;
226 /* The head of the names list that was current when the label was
227 defined, or the inner scope popped. These are the decls that will
228 be skipped when jumping to the label. */
230 /* A vector of all decls from all binding levels that would be
231 crossed by a backward branch to the label. */
232 vec
<tree
, va_gc
> *bad_decls
;
234 /* A list of uses of the label, before the label is defined. */
235 struct named_label_use_entry
*uses
;
237 /* The following bits are set after the label is defined, and are
238 updated as scopes are popped. They indicate that a backward jump
239 to the label will illegally enter a scope of the given flavor. */
245 #define named_labels cp_function_chain->x_named_labels
247 /* The number of function bodies which we are currently processing.
248 (Zero if we are at namespace scope, one inside the body of a
249 function, two inside the body of a function in a local class, etc.) */
252 /* To avoid unwanted recursion, finish_function defers all mark_used calls
253 encountered during its execution until it finishes. */
254 bool defer_mark_used_calls
;
255 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
257 /* States indicating how grokdeclarator() should handle declspecs marked
258 with __attribute__((deprecated)). An object declared as
259 __attribute__((deprecated)) suppresses warnings of uses of other
261 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
264 /* A list of VAR_DECLs whose type was incomplete at the time the
265 variable was declared. */
267 typedef struct GTY(()) incomplete_var_d
{
269 tree incomplete_type
;
273 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
275 /* Returns the kind of template specialization we are currently
276 processing, given that it's declaration contained N_CLASS_SCOPES
277 explicit scope qualifications. */
280 current_tmpl_spec_kind (int n_class_scopes
)
282 int n_template_parm_scopes
= 0;
283 int seen_specialization_p
= 0;
284 int innermost_specialization_p
= 0;
287 /* Scan through the template parameter scopes. */
288 for (b
= current_binding_level
;
289 b
->kind
== sk_template_parms
;
292 /* If we see a specialization scope inside a parameter scope,
293 then something is wrong. That corresponds to a declaration
296 template <class T> template <> ...
298 which is always invalid since [temp.expl.spec] forbids the
299 specialization of a class member template if the enclosing
300 class templates are not explicitly specialized as well. */
301 if (b
->explicit_spec_p
)
303 if (n_template_parm_scopes
== 0)
304 innermost_specialization_p
= 1;
306 seen_specialization_p
= 1;
308 else if (seen_specialization_p
== 1)
309 return tsk_invalid_member_spec
;
311 ++n_template_parm_scopes
;
314 /* Handle explicit instantiations. */
315 if (processing_explicit_instantiation
)
317 if (n_template_parm_scopes
!= 0)
318 /* We've seen a template parameter list during an explicit
319 instantiation. For example:
321 template <class T> template void f(int);
323 This is erroneous. */
324 return tsk_invalid_expl_inst
;
326 return tsk_expl_inst
;
329 if (n_template_parm_scopes
< n_class_scopes
)
330 /* We've not seen enough template headers to match all the
331 specialized classes present. For example:
333 template <class T> void R<T>::S<T>::f(int);
335 This is invalid; there needs to be one set of template
336 parameters for each class. */
337 return tsk_insufficient_parms
;
338 else if (n_template_parm_scopes
== n_class_scopes
)
339 /* We're processing a non-template declaration (even though it may
340 be a member of a template class.) For example:
342 template <class T> void S<T>::f(int);
344 The `class T' matches the `S<T>', leaving no template headers
345 corresponding to the `f'. */
347 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
348 /* We've got too many template headers. For example:
350 template <> template <class T> void f (T);
352 There need to be more enclosing classes. */
353 return tsk_excessive_parms
;
355 /* This must be a template. It's of the form:
357 template <class T> template <class U> void S<T>::f(U);
359 This is a specialization if the innermost level was a
360 specialization; otherwise it's just a definition of the
362 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
365 /* Exit the current scope. */
373 /* When a label goes out of scope, check to see if that label was used
374 in a valid manner, and issue any appropriate warnings or errors. */
377 pop_label (tree label
, tree old_value
)
379 if (!processing_template_decl
)
381 if (DECL_INITIAL (label
) == NULL_TREE
)
385 error ("label %q+D used but not defined", label
);
386 location
= input_location
;
387 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
388 /* Avoid crashing later. */
389 define_label (location
, DECL_NAME (label
));
392 warn_for_unused_label (label
);
395 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
398 /* At the end of a function, all labels declared within the function
399 go out of scope. BLOCK is the top-level block for the
403 pop_labels_1 (named_label_entry
**slot
, tree block
)
405 struct named_label_entry
*ent
= *slot
;
407 pop_label (ent
->label_decl
, NULL_TREE
);
409 /* Put the labels into the "variables" of the top-level block,
410 so debugger can see them. */
411 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
412 BLOCK_VARS (block
) = ent
->label_decl
;
414 named_labels
->clear_slot (slot
);
420 pop_labels (tree block
)
424 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
429 /* At the end of a block with local labels, restore the outer definition. */
432 pop_local_label (tree label
, tree old_value
)
434 struct named_label_entry dummy
;
436 pop_label (label
, old_value
);
438 dummy
.label_decl
= label
;
439 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
440 named_labels
->clear_slot (slot
);
443 /* The following two routines are used to interface to Objective-C++.
444 The binding level is purposely treated as an opaque type. */
447 objc_get_current_scope (void)
449 return current_binding_level
;
452 /* The following routine is used by the NeXT-style SJLJ exceptions;
453 variables get marked 'volatile' so as to not be clobbered by
454 _setjmp()/_longjmp() calls. All variables in the current scope,
455 as well as parent scopes up to (but not including) ENCLOSING_BLK
456 shall be thusly marked. */
459 objc_mark_locals_volatile (void *enclosing_blk
)
461 cp_binding_level
*scope
;
463 for (scope
= current_binding_level
;
464 scope
&& scope
!= enclosing_blk
;
465 scope
= scope
->level_chain
)
469 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
470 objc_volatilize_decl (decl
);
472 /* Do not climb up past the current function. */
473 if (scope
->kind
== sk_function_parms
)
478 /* Update data for defined and undefined labels when leaving a scope. */
481 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
483 named_label_entry
*ent
= *slot
;
484 cp_binding_level
*obl
= bl
->level_chain
;
486 if (ent
->binding_level
== bl
)
490 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
491 TREE_LISTs representing OVERLOADs, so be careful. */
492 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
494 : TREE_CHAIN (decl
)))
495 if (decl_jump_unsafe (decl
))
496 vec_safe_push (ent
->bad_decls
, decl
);
498 ent
->binding_level
= obl
;
499 ent
->names_in_scope
= obl
->names
;
503 ent
->in_try_scope
= true;
506 ent
->in_catch_scope
= true;
509 ent
->in_omp_scope
= true;
517 struct named_label_use_entry
*use
;
519 for (use
= ent
->uses
; use
; use
= use
->next
)
520 if (use
->binding_level
== bl
)
522 use
->binding_level
= obl
;
523 use
->names_in_scope
= obl
->names
;
524 if (bl
->kind
== sk_omp
)
525 use
->in_omp_scope
= true;
532 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
533 when errors were reported, except for -Werror-unused-but-set-*. */
534 static int unused_but_set_errorcount
;
536 /* Exit a binding level.
537 Pop the level off, and restore the state of the identifier-decl mappings
538 that were in effect when this level was entered.
540 If KEEP == 1, this level had explicit declarations, so
541 and create a "block" (a BLOCK node) for the level
542 to record its declarations and subblocks for symbol table output.
544 If FUNCTIONBODY is nonzero, this level is the body of a function,
545 so create a block as if KEEP were set and also clear out all
548 If REVERSE is nonzero, reverse the order of decls before putting
549 them into the BLOCK. */
552 poplevel (int keep
, int reverse
, int functionbody
)
555 /* The chain of decls was accumulated in reverse order.
556 Put it into forward order, just for cleanliness. */
561 int leaving_for_scope
;
564 cp_label_binding
*label_bind
;
566 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
571 gcc_assert (current_binding_level
->kind
!= sk_class
);
573 if (current_binding_level
->kind
== sk_cleanup
)
575 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
577 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
579 /* We used to use KEEP == 2 to indicate that the new block should go
580 at the beginning of the list of blocks at this binding level,
581 rather than the end. This hack is no longer used. */
582 gcc_assert (keep
== 0 || keep
== 1);
584 if (current_binding_level
->keep
)
587 /* Any uses of undefined labels, and any defined labels, now operate
588 under constraints of next binding contour. */
589 if (cfun
&& !functionbody
&& named_labels
)
590 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
591 (current_binding_level
);
593 /* Get the decls in the order they were written.
594 Usually current_binding_level->names is in reverse order.
595 But parameter decls were previously put in forward order. */
598 current_binding_level
->names
599 = decls
= nreverse (current_binding_level
->names
);
601 decls
= current_binding_level
->names
;
603 /* If there were any declarations or structure tags in that level,
604 or if this level is a function body,
605 create a BLOCK to record them for the life of this function. */
607 if (keep
== 1 || functionbody
)
608 block
= make_node (BLOCK
);
609 if (block
!= NULL_TREE
)
611 BLOCK_VARS (block
) = decls
;
612 BLOCK_SUBBLOCKS (block
) = subblocks
;
615 /* In each subblock, record that this is its superior. */
617 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
618 BLOCK_SUPERCONTEXT (link
) = block
;
620 /* We still support the old for-scope rules, whereby the variables
621 in a for-init statement were in scope after the for-statement
622 ended. We only use the new rules if flag_new_for_scope is
625 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
627 /* Before we remove the declarations first check for unused variables. */
628 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
629 && current_binding_level
->kind
!= sk_template_parms
630 && !processing_template_decl
)
631 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
633 /* There are cases where D itself is a TREE_LIST. See in
634 push_local_binding where the list of decls returned by
635 getdecls is built. */
636 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
637 tree type
= TREE_TYPE (decl
);
639 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
640 && ! DECL_IN_SYSTEM_HEADER (decl
)
641 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
642 && type
!= error_mark_node
643 && (!CLASS_TYPE_P (type
)
644 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
645 || lookup_attribute ("warn_unused",
646 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
648 if (! TREE_USED (decl
))
649 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
650 else if (DECL_CONTEXT (decl
) == current_function_decl
651 // For -Wunused-but-set-variable leave references alone.
652 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
653 && errorcount
== unused_but_set_errorcount
)
655 warning (OPT_Wunused_but_set_variable
,
656 "variable %q+D set but not used", decl
);
657 unused_but_set_errorcount
= errorcount
;
662 /* Remove declarations for all the DECLs in this level. */
663 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
665 if (leaving_for_scope
&& VAR_P (link
)
666 /* It's hard to make this ARM compatibility hack play nicely with
667 lambdas, and it really isn't necessary in C++11 mode. */
668 && cxx_dialect
< cxx11
671 tree name
= DECL_NAME (link
);
675 ob
= outer_binding (name
,
676 IDENTIFIER_BINDING (name
),
679 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
681 ns_binding
= NULL_TREE
;
683 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
684 /* We have something like:
689 and we are leaving the `for' scope. There's no reason to
690 keep the binding of the inner `i' in this case. */
691 pop_binding (name
, link
);
692 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
693 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
694 /* Here, we have something like:
702 We must pop the for-scope binding so we know what's a
703 type and what isn't. */
704 pop_binding (name
, link
);
707 /* Mark this VAR_DECL as dead so that we can tell we left it
708 there only for backward compatibility. */
709 DECL_DEAD_FOR_LOCAL (link
) = 1;
711 /* Keep track of what should have happened when we
712 popped the binding. */
715 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
716 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
719 /* Add it to the list of dead variables in the next
720 outermost binding to that we can remove these when we
721 leave that binding. */
723 current_binding_level
->level_chain
->dead_vars_from_for
,
726 /* Although we don't pop the cxx_binding, we do clear
727 its SCOPE since the scope is going away now. */
728 IDENTIFIER_BINDING (name
)->scope
729 = current_binding_level
->level_chain
;
736 /* Remove the binding. */
739 if (TREE_CODE (decl
) == TREE_LIST
)
740 decl
= TREE_VALUE (decl
);
743 if (TREE_CODE (name
) == OVERLOAD
)
744 name
= OVL_FUNCTION (name
);
746 gcc_assert (DECL_P (name
));
747 pop_binding (DECL_NAME (name
), decl
);
751 /* Remove declarations for any `for' variables from inner scopes
752 that we kept around. */
753 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
755 pop_binding (DECL_NAME (decl
), decl
);
757 /* Restore the IDENTIFIER_TYPE_VALUEs. */
758 for (link
= current_binding_level
->type_shadowed
;
759 link
; link
= TREE_CHAIN (link
))
760 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
762 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
763 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
765 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
767 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
768 list if a `using' declaration put them there. The debugging
769 back ends won't understand OVERLOAD, so we remove them here.
770 Because the BLOCK_VARS are (temporarily) shared with
771 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
772 popped all the bindings. */
777 for (d
= &BLOCK_VARS (block
); *d
; )
779 if (TREE_CODE (*d
) == TREE_LIST
)
780 *d
= TREE_CHAIN (*d
);
782 d
= &DECL_CHAIN (*d
);
786 /* If the level being exited is the top level of a function,
787 check over all the labels. */
790 /* Since this is the top level block of a function, the vars are
791 the function's parameters. Don't leave them in the BLOCK
792 because they are found in the FUNCTION_DECL instead. */
793 BLOCK_VARS (block
) = 0;
797 kind
= current_binding_level
->kind
;
798 if (kind
== sk_cleanup
)
802 /* If this is a temporary binding created for a cleanup, then we'll
803 have pushed a statement list level. Pop that, create a new
804 BIND_EXPR for the block, and insert it into the stream. */
805 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
806 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
813 /* The current function is being defined, so its DECL_INITIAL
814 should be error_mark_node. */
815 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
816 DECL_INITIAL (current_function_decl
) = block
;
819 current_binding_level
->blocks
820 = block_chainon (current_binding_level
->blocks
, block
);
822 /* If we did not make a block for the level just exited,
823 any blocks made for inner levels
824 (since they cannot be recorded as subblocks in that level)
825 must be carried forward so they will later become subblocks
826 of something else. */
828 current_binding_level
->blocks
829 = block_chainon (current_binding_level
->blocks
, subblocks
);
831 /* Each and every BLOCK node created here in `poplevel' is important
832 (e.g. for proper debugging information) so if we created one
833 earlier, mark it as "used". */
835 TREE_USED (block
) = 1;
837 /* All temporary bindings created for cleanups are popped silently. */
838 if (kind
== sk_cleanup
)
841 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
845 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
846 itself, calling F for each. The DATA is passed to F as well. */
849 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
852 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
854 result
|= (*f
) (name_space
, data
);
856 for (; current
; current
= DECL_CHAIN (current
))
857 result
|= walk_namespaces_r (current
, f
, data
);
862 /* Walk all the namespaces, calling F for each. The DATA is passed to
866 walk_namespaces (walk_namespaces_fn f
, void* data
)
868 return walk_namespaces_r (global_namespace
, f
, data
);
871 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
872 DATA is non-NULL, this is the last time we will call
873 wrapup_global_declarations for this NAMESPACE. */
876 wrapup_globals_for_namespace (tree name_space
, void* data
)
878 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
879 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
880 tree
*vec
= statics
->address ();
881 int len
= statics
->length ();
882 int last_time
= (data
!= 0);
886 check_global_declarations (vec
, len
);
887 emit_debug_global_declarations (vec
, len
);
891 /* Write out any globals that need to be output. */
892 return wrapup_global_declarations (vec
, len
);
896 /* In C++, you don't have to write `struct S' to refer to `S'; you
897 can just use `S'. We accomplish this by creating a TYPE_DECL as
898 if the user had written `typedef struct S S'. Create and return
899 the TYPE_DECL for TYPE. */
902 create_implicit_typedef (tree name
, tree type
)
906 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
907 DECL_ARTIFICIAL (decl
) = 1;
908 /* There are other implicit type declarations, like the one *within*
909 a class that allows you to write `S::S'. We must distinguish
911 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
912 TYPE_NAME (type
) = decl
;
913 TYPE_STUB_DECL (type
) = decl
;
918 /* Remember a local name for name-mangling purposes. */
921 push_local_name (tree decl
)
926 timevar_start (TV_NAME_LOOKUP
);
928 name
= DECL_NAME (decl
);
930 nelts
= vec_safe_length (local_names
);
931 for (i
= 0; i
< nelts
; i
++)
933 t
= (*local_names
)[i
];
934 if (DECL_NAME (t
) == name
)
936 if (!DECL_LANG_SPECIFIC (decl
))
937 retrofit_lang_decl (decl
);
938 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
939 if (DECL_DISCRIMINATOR_SET_P (t
))
940 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
942 DECL_DISCRIMINATOR (decl
) = 1;
944 (*local_names
)[i
] = decl
;
945 timevar_stop (TV_NAME_LOOKUP
);
950 vec_safe_push (local_names
, decl
);
951 timevar_stop (TV_NAME_LOOKUP
);
954 /* Subroutine of duplicate_decls: return truthvalue of whether
955 or not types of these decls match.
957 For C++, we must compare the parameter list so that `int' can match
958 `int&' in a parameter position, but `int&' is not confused with
962 decls_match (tree newdecl
, tree olddecl
)
966 if (newdecl
== olddecl
)
969 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
970 /* If the two DECLs are not even the same kind of thing, we're not
971 interested in their types. */
974 gcc_assert (DECL_P (newdecl
));
976 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
978 tree f1
= TREE_TYPE (newdecl
);
979 tree f2
= TREE_TYPE (olddecl
);
980 tree p1
= TYPE_ARG_TYPES (f1
);
981 tree p2
= TYPE_ARG_TYPES (f2
);
984 /* Specializations of different templates are different functions
985 even if they have the same type. */
986 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
987 ? DECL_TI_TEMPLATE (newdecl
)
989 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
990 ? DECL_TI_TEMPLATE (olddecl
)
995 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
996 && ! (DECL_EXTERN_C_P (newdecl
)
997 && DECL_EXTERN_C_P (olddecl
)))
1000 /* A new declaration doesn't match a built-in one unless it
1001 is also extern "C". */
1002 if (DECL_IS_BUILTIN (olddecl
)
1003 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1006 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1009 /* A declaration with deduced return type should use its pre-deduction
1010 type for declaration matching. */
1011 r2
= fndecl_declared_return_type (olddecl
);
1013 if (same_type_p (TREE_TYPE (f1
), r2
))
1015 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1016 && (DECL_BUILT_IN (olddecl
)
1017 #ifndef NO_IMPLICIT_EXTERN_C
1018 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1019 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1023 types_match
= self_promoting_args_p (p1
);
1024 if (p1
== void_list_node
)
1025 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1027 #ifndef NO_IMPLICIT_EXTERN_C
1028 else if (!prototype_p (f1
)
1029 && (DECL_EXTERN_C_P (olddecl
)
1030 && DECL_IN_SYSTEM_HEADER (olddecl
)
1031 && !DECL_CLASS_SCOPE_P (olddecl
))
1032 && (DECL_EXTERN_C_P (newdecl
)
1033 && DECL_IN_SYSTEM_HEADER (newdecl
)
1034 && !DECL_CLASS_SCOPE_P (newdecl
)))
1036 types_match
= self_promoting_args_p (p2
);
1037 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1043 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1044 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1045 || comp_type_attributes (TREE_TYPE (newdecl
),
1046 TREE_TYPE (olddecl
)) != 0);
1051 /* The decls dont match if they correspond to two different versions
1052 of the same function. Disallow extern "C" functions to be
1053 versions for now. */
1055 && !DECL_EXTERN_C_P (newdecl
)
1056 && !DECL_EXTERN_C_P (olddecl
)
1057 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1059 /* Mark functions as versions if necessary. Modify the mangled decl
1060 name if necessary. */
1061 if (DECL_FUNCTION_VERSIONED (newdecl
)
1062 && DECL_FUNCTION_VERSIONED (olddecl
))
1064 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1066 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1067 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1068 mangle_decl (newdecl
);
1070 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1072 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1073 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1074 mangle_decl (olddecl
);
1076 cgraph_node::record_function_versions (olddecl
, newdecl
);
1080 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1082 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1083 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1086 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1087 DECL_TEMPLATE_PARMS (olddecl
)))
1090 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1091 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1092 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1094 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1095 DECL_TEMPLATE_RESULT (newdecl
));
1099 /* Need to check scope for variable declaration (VAR_DECL).
1100 For typedef (TYPE_DECL), scope is ignored. */
1102 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1104 Two declarations for an object with C language linkage
1105 with the same name (ignoring the namespace that qualify
1106 it) that appear in different namespace scopes refer to
1108 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1111 if (TREE_TYPE (newdecl
) == error_mark_node
)
1112 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1113 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1114 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1115 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1118 types_match
= comptypes (TREE_TYPE (newdecl
),
1119 TREE_TYPE (olddecl
),
1120 COMPARE_REDECLARATION
);
1126 /* If NEWDECL is `static' and an `extern' was seen previously,
1127 warn about it. OLDDECL is the previous declaration.
1129 Note that this does not apply to the C++ case of declaring
1130 a variable `extern const' and then later `const'.
1132 Don't complain about built-in functions, since they are beyond
1133 the user's control. */
1136 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1138 if (TREE_CODE (newdecl
) == TYPE_DECL
1139 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1140 || TREE_CODE (newdecl
) == CONST_DECL
1141 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1144 /* Don't get confused by static member functions; that's a different
1146 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1147 && DECL_STATIC_FUNCTION_P (newdecl
))
1150 /* If the old declaration was `static', or the new one isn't, then
1151 everything is OK. */
1152 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1155 /* It's OK to declare a builtin function as `static'. */
1156 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1157 && DECL_ARTIFICIAL (olddecl
))
1160 if (permerror (input_location
,
1161 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1162 inform (input_location
, "previous declaration of %q+D", olddecl
);
1165 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1166 function templates. If their exception specifications do not
1167 match, issue a diagnostic. */
1170 check_redeclaration_exception_specification (tree new_decl
,
1173 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1174 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1176 /* Two default specs are equivalent, don't force evaluation. */
1177 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1178 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1181 maybe_instantiate_noexcept (new_decl
);
1182 maybe_instantiate_noexcept (old_decl
);
1183 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1184 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1188 If any declaration of a function has an exception-specification,
1189 all declarations, including the definition and an explicit
1190 specialization, of that function shall have an
1191 exception-specification with the same set of type-ids. */
1192 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1193 && ! DECL_IS_BUILTIN (old_decl
)
1195 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1197 error ("declaration of %qF has a different exception specifier",
1199 error ("from previous declaration %q+F", old_decl
);
1203 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1204 Otherwise issue diagnostics. */
1207 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1209 old_decl
= STRIP_TEMPLATE (old_decl
);
1210 new_decl
= STRIP_TEMPLATE (new_decl
);
1211 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1212 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1214 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1215 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1217 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1219 if (DECL_BUILT_IN (old_decl
))
1221 /* Hide a built-in declaration. */
1222 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1223 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1226 /* 7.1.5 [dcl.constexpr]
1227 Note: An explicit specialization can differ from the template
1228 declaration with respect to the constexpr specifier. */
1229 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1230 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1233 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1234 error ("from previous declaration %q+D", old_decl
);
1240 /* DECL is a redeclaration of a function or function template. If
1241 it does have default arguments issue a diagnostic. Note: this
1242 function is used to enforce the requirements in C++11 8.3.6 about
1243 no default arguments in redeclarations. */
1246 check_redeclaration_no_default_args (tree decl
)
1248 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1250 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1251 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1252 if (TREE_PURPOSE (t
))
1254 permerror (input_location
,
1255 "redeclaration of %q#D may not have default "
1261 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1262 && lookup_attribute ("gnu_inline", \
1263 DECL_ATTRIBUTES (fn)))
1265 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1266 If the redeclaration is invalid, a diagnostic is issued, and the
1267 error_mark_node is returned. Otherwise, OLDDECL is returned.
1269 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1272 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1275 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1277 unsigned olddecl_uid
= DECL_UID (olddecl
);
1278 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1279 int new_defines_function
= 0;
1280 tree new_template_info
;
1282 if (newdecl
== olddecl
)
1285 types_match
= decls_match (newdecl
, olddecl
);
1287 /* If either the type of the new decl or the type of the old decl is an
1288 error_mark_node, then that implies that we have already issued an
1289 error (earlier) for some bogus type specification, and in that case,
1290 it is rather pointless to harass the user with yet more error message
1291 about the same declaration, so just pretend the types match here. */
1292 if (TREE_TYPE (newdecl
) == error_mark_node
1293 || TREE_TYPE (olddecl
) == error_mark_node
)
1294 return error_mark_node
;
1296 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1297 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1299 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1300 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1301 && check_raw_literal_operator (olddecl
))
1302 error ("literal operator template %q+D conflicts with"
1303 " raw literal operator %qD", newdecl
, olddecl
);
1304 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1305 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1306 && check_raw_literal_operator (newdecl
))
1307 error ("raw literal operator %q+D conflicts with"
1308 " literal operator template %qD", newdecl
, olddecl
);
1311 if (DECL_P (olddecl
)
1312 && TREE_CODE (newdecl
) == FUNCTION_DECL
1313 && TREE_CODE (olddecl
) == FUNCTION_DECL
1314 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1316 if (DECL_DECLARED_INLINE_P (newdecl
)
1317 && DECL_UNINLINABLE (newdecl
)
1318 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1319 /* Already warned elsewhere. */;
1320 else if (DECL_DECLARED_INLINE_P (olddecl
)
1321 && DECL_UNINLINABLE (olddecl
)
1322 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1323 /* Already warned. */;
1324 else if (DECL_DECLARED_INLINE_P (newdecl
)
1325 && DECL_UNINLINABLE (olddecl
)
1326 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1328 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1330 inform (DECL_SOURCE_LOCATION (olddecl
),
1331 "previous declaration of %qD with attribute noinline",
1334 else if (DECL_DECLARED_INLINE_P (olddecl
)
1335 && DECL_UNINLINABLE (newdecl
)
1336 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1338 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1339 "attribute noinline", newdecl
))
1340 inform (DECL_SOURCE_LOCATION (olddecl
),
1341 "previous declaration of %qD was inline",
1346 /* Check for redeclaration and other discrepancies. */
1347 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1348 && DECL_ARTIFICIAL (olddecl
))
1350 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1351 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1353 /* Avoid warnings redeclaring built-ins which have not been
1354 explicitly declared. */
1355 if (DECL_ANTICIPATED (olddecl
))
1358 /* If you declare a built-in or predefined function name as static,
1359 the old definition is overridden, but optionally warn this was a
1360 bad choice of name. */
1361 if (! TREE_PUBLIC (newdecl
))
1363 warning (OPT_Wshadow
,
1364 DECL_BUILT_IN (olddecl
)
1365 ? G_("shadowing built-in function %q#D")
1366 : G_("shadowing library function %q#D"), olddecl
);
1367 /* Discard the old built-in function. */
1370 /* If the built-in is not ansi, then programs can override
1371 it even globally without an error. */
1372 else if (! DECL_BUILT_IN (olddecl
))
1373 warning (0, "library function %q#D redeclared as non-function %q#D",
1376 error ("declaration of %q#D conflicts with built-in "
1377 "declaration %q#D", newdecl
, olddecl
);
1380 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1382 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1383 error_at (DECL_SOURCE_LOCATION (newdecl
),
1384 "redeclaration of %<pragma omp declare reduction%>");
1385 inform (DECL_SOURCE_LOCATION (olddecl
),
1386 "previous %<pragma omp declare reduction%> declaration");
1387 return error_mark_node
;
1389 else if (!types_match
)
1391 /* Avoid warnings redeclaring built-ins which have not been
1392 explicitly declared. */
1393 if (DECL_ANTICIPATED (olddecl
))
1395 /* Deal with fileptr_type_node. FILE type is not known
1396 at the time we create the builtins. */
1399 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1400 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1402 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1405 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1407 tree t
= TREE_VALUE (t1
);
1410 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1411 == get_identifier ("FILE")
1412 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1414 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1416 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1417 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1418 types_match
= decls_match (newdecl
, olddecl
);
1420 return duplicate_decls (newdecl
, olddecl
,
1422 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1425 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1428 else if ((DECL_EXTERN_C_P (newdecl
)
1429 && DECL_EXTERN_C_P (olddecl
))
1430 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1431 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1433 /* A near match; override the builtin. */
1435 if (TREE_PUBLIC (newdecl
))
1436 warning (0, "new declaration %q#D ambiguates built-in "
1437 "declaration %q#D", newdecl
, olddecl
);
1439 warning (OPT_Wshadow
,
1440 DECL_BUILT_IN (olddecl
)
1441 ? G_("shadowing built-in function %q#D")
1442 : G_("shadowing library function %q#D"), olddecl
);
1445 /* Discard the old built-in function. */
1448 /* Replace the old RTL to avoid problems with inlining. */
1449 COPY_DECL_RTL (newdecl
, olddecl
);
1451 /* Even if the types match, prefer the new declarations type for
1452 built-ins which have not been explicitly declared, for
1453 exception lists, etc... */
1454 else if (DECL_IS_BUILTIN (olddecl
))
1456 tree type
= TREE_TYPE (newdecl
);
1457 tree attribs
= (*targetm
.merge_type_attributes
)
1458 (TREE_TYPE (olddecl
), type
);
1460 type
= cp_build_type_attribute_variant (type
, attribs
);
1461 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1464 /* If a function is explicitly declared "throw ()", propagate that to
1465 the corresponding builtin. */
1466 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1467 && DECL_ANTICIPATED (olddecl
)
1468 && TREE_NOTHROW (newdecl
)
1469 && !TREE_NOTHROW (olddecl
))
1471 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1472 tree tmpdecl
= builtin_decl_explicit (fncode
);
1473 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1474 TREE_NOTHROW (tmpdecl
) = 1;
1477 /* Whether or not the builtin can throw exceptions has no
1478 bearing on this declarator. */
1479 TREE_NOTHROW (olddecl
) = 0;
1481 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1483 /* If a builtin function is redeclared as `static', merge
1484 the declarations, but make the original one static. */
1485 DECL_THIS_STATIC (olddecl
) = 1;
1486 TREE_PUBLIC (olddecl
) = 0;
1488 /* Make the old declaration consistent with the new one so
1489 that all remnants of the builtin-ness of this function
1490 will be banished. */
1491 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1492 COPY_DECL_RTL (newdecl
, olddecl
);
1495 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1497 /* C++ Standard, 3.3, clause 4:
1498 "[Note: a namespace name or a class template name must be unique
1499 in its declarative region (7.3.2, clause 14). ]" */
1500 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1501 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1502 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1503 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1504 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1505 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1507 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1508 && TREE_CODE (newdecl
) != TYPE_DECL
)
1509 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1510 && TREE_CODE (olddecl
) != TYPE_DECL
))
1512 /* We do nothing special here, because C++ does such nasty
1513 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1514 get shadowed, and know that if we need to find a TYPE_DECL
1515 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1516 slot of the identifier. */
1520 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1521 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1522 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1523 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1527 error ("%q#D redeclared as different kind of symbol", newdecl
);
1528 if (TREE_CODE (olddecl
) == TREE_LIST
)
1529 olddecl
= TREE_VALUE (olddecl
);
1530 inform (DECL_SOURCE_LOCATION (olddecl
),
1531 "previous declaration %q#D", olddecl
);
1533 return error_mark_node
;
1535 else if (!types_match
)
1537 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1538 /* These are certainly not duplicate declarations; they're
1539 from different scopes. */
1542 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1544 /* The name of a class template may not be declared to refer to
1545 any other template, class, function, object, namespace, value,
1546 or type in the same scope. */
1547 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1548 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1550 error ("conflicting declaration of template %q#D", newdecl
);
1551 inform (DECL_SOURCE_LOCATION (olddecl
),
1552 "previous declaration %q#D", olddecl
);
1553 return error_mark_node
;
1555 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1556 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1557 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1558 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1559 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1560 DECL_TEMPLATE_PARMS (olddecl
))
1561 /* Template functions can be disambiguated by
1563 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1564 TREE_TYPE (TREE_TYPE (olddecl
))))
1566 error ("ambiguating new declaration %q#D", newdecl
);
1567 inform (DECL_SOURCE_LOCATION (olddecl
),
1568 "old declaration %q#D", olddecl
);
1572 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1574 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1576 error ("conflicting declaration of C function %q#D",
1578 inform (DECL_SOURCE_LOCATION (olddecl
),
1579 "previous declaration %q#D", olddecl
);
1582 /* For function versions, params and types match, but they
1583 are not ambiguous. */
1584 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1585 && !DECL_FUNCTION_VERSIONED (olddecl
))
1586 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1587 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1589 error ("ambiguating new declaration of %q#D", newdecl
);
1590 inform (DECL_SOURCE_LOCATION (olddecl
),
1591 "old declaration %q#D", olddecl
);
1592 return error_mark_node
;
1599 error ("conflicting declaration %q#D", newdecl
);
1600 inform (DECL_SOURCE_LOCATION (olddecl
),
1601 "previous declaration as %q#D", olddecl
);
1602 return error_mark_node
;
1605 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1606 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1607 && (!DECL_TEMPLATE_INFO (newdecl
)
1608 || (DECL_TI_TEMPLATE (newdecl
)
1609 != DECL_TI_TEMPLATE (olddecl
))))
1610 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1611 && (!DECL_TEMPLATE_INFO (olddecl
)
1612 || (DECL_TI_TEMPLATE (olddecl
)
1613 != DECL_TI_TEMPLATE (newdecl
))))))
1614 /* It's OK to have a template specialization and a non-template
1615 with the same type, or to have specializations of two
1616 different templates with the same type. Note that if one is a
1617 specialization, and the other is an instantiation of the same
1618 template, that we do not exit at this point. That situation
1619 can occur if we instantiate a template class, and then
1620 specialize one of its methods. This situation is valid, but
1621 the declarations must be merged in the usual way. */
1623 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1624 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1625 && !DECL_USE_TEMPLATE (newdecl
))
1626 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1627 && !DECL_USE_TEMPLATE (olddecl
))))
1628 /* One of the declarations is a template instantiation, and the
1629 other is not a template at all. That's OK. */
1631 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1633 /* In [namespace.alias] we have:
1635 In a declarative region, a namespace-alias-definition can be
1636 used to redefine a namespace-alias declared in that declarative
1637 region to refer only to the namespace to which it already
1640 Therefore, if we encounter a second alias directive for the same
1641 alias, we can just ignore the second directive. */
1642 if (DECL_NAMESPACE_ALIAS (newdecl
)
1643 && (DECL_NAMESPACE_ALIAS (newdecl
)
1644 == DECL_NAMESPACE_ALIAS (olddecl
)))
1646 /* [namespace.alias]
1648 A namespace-name or namespace-alias shall not be declared as
1649 the name of any other entity in the same declarative region.
1650 A namespace-name defined at global scope shall not be
1651 declared as the name of any other entity in any global scope
1653 error ("conflicting declaration of namespace %qD", newdecl
);
1654 inform (DECL_SOURCE_LOCATION (olddecl
),
1655 "previous declaration of namespace %qD here", olddecl
);
1656 return error_mark_node
;
1660 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1663 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1664 if (DECL_NAME (olddecl
) != NULL_TREE
)
1665 inform (input_location
,
1666 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1667 ? G_("%q+#D previously defined here")
1668 : G_("%q+#D previously declared here"), olddecl
);
1669 return error_mark_node
;
1671 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1672 && DECL_INITIAL (olddecl
) != NULL_TREE
1673 && !prototype_p (TREE_TYPE (olddecl
))
1674 && prototype_p (TREE_TYPE (newdecl
)))
1676 /* Prototype decl follows defn w/o prototype. */
1677 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1678 "prototype specified for %q#D", newdecl
))
1679 inform (DECL_SOURCE_LOCATION (olddecl
),
1680 "previous non-prototype definition here");
1682 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1683 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1686 If two declarations of the same function or object
1687 specify different linkage-specifications ..., the program
1688 is ill-formed.... Except for functions with C++ linkage,
1689 a function declaration without a linkage specification
1690 shall not precede the first linkage specification for
1691 that function. A function can be declared without a
1692 linkage specification after an explicit linkage
1693 specification has been seen; the linkage explicitly
1694 specified in the earlier declaration is not affected by
1695 such a function declaration.
1697 DR 563 raises the question why the restrictions on
1698 functions should not also apply to objects. Older
1699 versions of G++ silently ignore the linkage-specification
1707 which is clearly wrong. Therefore, we now treat objects
1709 if (current_lang_depth () == 0)
1711 /* There is no explicit linkage-specification, so we use
1712 the linkage from the previous declaration. */
1713 if (!DECL_LANG_SPECIFIC (newdecl
))
1714 retrofit_lang_decl (newdecl
);
1715 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1719 error ("conflicting declaration of %q#D with %qL linkage",
1720 newdecl
, DECL_LANGUAGE (newdecl
));
1721 inform (DECL_SOURCE_LOCATION (olddecl
),
1722 "previous declaration with %qL linkage",
1723 DECL_LANGUAGE (olddecl
));
1727 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1729 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1731 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1732 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1733 && (/* grokfndecl passes member function templates too
1734 as FUNCTION_DECLs. */
1735 DECL_TEMPLATE_INFO (olddecl
)
1737 Default arguments for a member function of a class
1738 template shall be specified on the initial declaration
1739 of the member function within the class template. */
1740 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1741 check_redeclaration_no_default_args (newdecl
);
1744 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1745 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1748 for (; t1
&& t1
!= void_list_node
;
1749 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1750 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1752 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1755 if (permerror (input_location
,
1756 "default argument given for parameter "
1757 "%d of %q#D", i
, newdecl
))
1758 inform (DECL_SOURCE_LOCATION (olddecl
),
1759 "previous specification in %q#D here",
1764 error ("default argument given for parameter %d "
1765 "of %q#D", i
, newdecl
);
1766 inform (DECL_SOURCE_LOCATION (olddecl
),
1767 "previous specification in %q#D here",
1775 /* Do not merge an implicit typedef with an explicit one. In:
1779 typedef class A A __attribute__ ((foo));
1781 the attribute should apply only to the typedef. */
1782 if (TREE_CODE (olddecl
) == TYPE_DECL
1783 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1784 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1787 /* If new decl is `static' and an `extern' was seen previously,
1789 warn_extern_redeclared_static (newdecl
, olddecl
);
1791 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1792 return error_mark_node
;
1794 /* We have committed to returning 1 at this point. */
1795 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1797 /* Now that functions must hold information normally held
1798 by field decls, there is extra work to do so that
1799 declaration information does not get destroyed during
1801 if (DECL_VINDEX (olddecl
))
1802 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1803 if (DECL_CONTEXT (olddecl
))
1804 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1805 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1806 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1807 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1808 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1809 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1810 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1811 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1812 SET_OVERLOADED_OPERATOR_CODE
1813 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1814 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1816 /* Optionally warn about more than one declaration for the same
1817 name, but don't warn about a function declaration followed by a
1819 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1820 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1821 /* Don't warn about extern decl followed by definition. */
1822 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1823 /* Don't warn about friends, let add_friend take care of it. */
1824 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1825 /* Don't warn about declaration followed by specialization. */
1826 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1827 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1829 if (warning (OPT_Wredundant_decls
,
1830 "redundant redeclaration of %qD in same scope",
1832 inform (DECL_SOURCE_LOCATION (olddecl
),
1833 "previous declaration of %qD", olddecl
);
1836 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1837 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1839 if (DECL_DELETED_FN (newdecl
))
1841 error ("deleted definition of %qD", newdecl
);
1842 inform (DECL_SOURCE_LOCATION (olddecl
),
1843 "previous declaration of %qD", olddecl
);
1845 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1849 /* Deal with C++: must preserve virtual function table size. */
1850 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1852 tree newtype
= TREE_TYPE (newdecl
);
1853 tree oldtype
= TREE_TYPE (olddecl
);
1855 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1856 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1857 CLASSTYPE_FRIEND_CLASSES (newtype
)
1858 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1860 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1863 /* Copy all the DECL_... slots specified in the new decl
1864 except for any that we copy here from the old type. */
1865 DECL_ATTRIBUTES (newdecl
)
1866 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1868 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1872 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1873 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1874 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1875 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1876 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1877 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1879 DECL_ATTRIBUTES (old_result
)
1880 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1882 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1884 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1885 declarations of a function template. */
1886 check_redeclaration_no_default_args (newdecl
);
1888 check_default_args (newdecl
);
1890 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1891 && DECL_INITIAL (new_result
))
1893 if (DECL_INITIAL (old_result
))
1894 DECL_UNINLINABLE (old_result
) = 1;
1896 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1897 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1898 DECL_NOT_REALLY_EXTERN (old_result
)
1899 = DECL_NOT_REALLY_EXTERN (new_result
);
1900 DECL_INTERFACE_KNOWN (old_result
)
1901 = DECL_INTERFACE_KNOWN (new_result
);
1902 DECL_DECLARED_INLINE_P (old_result
)
1903 = DECL_DECLARED_INLINE_P (new_result
);
1904 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1905 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1910 DECL_DECLARED_INLINE_P (old_result
)
1911 |= DECL_DECLARED_INLINE_P (new_result
);
1912 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1913 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1914 check_redeclaration_exception_specification (newdecl
, olddecl
);
1918 /* If the new declaration is a definition, update the file and
1919 line information on the declaration, and also make
1920 the old declaration the same definition. */
1921 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1923 DECL_SOURCE_LOCATION (olddecl
)
1924 = DECL_SOURCE_LOCATION (old_result
)
1925 = DECL_SOURCE_LOCATION (newdecl
);
1926 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1927 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1930 DECL_ARGUMENTS (old_result
)
1931 = DECL_ARGUMENTS (new_result
);
1932 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1933 parm
= DECL_CHAIN (parm
))
1934 DECL_CONTEXT (parm
) = old_result
;
1943 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1944 check_redeclaration_exception_specification (newdecl
, olddecl
);
1946 /* Automatically handles default parameters. */
1947 tree oldtype
= TREE_TYPE (olddecl
);
1950 /* For typedefs use the old type, as the new type's DECL_NAME points
1951 at newdecl, which will be ggc_freed. */
1952 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1955 /* Merge the data types specified in the two decls. */
1956 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1958 if (VAR_P (newdecl
))
1960 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1961 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1962 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1963 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1964 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1965 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1967 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1968 if (DECL_LANG_SPECIFIC (olddecl
)
1969 && CP_DECL_THREADPRIVATE_P (olddecl
))
1971 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1972 if (!DECL_LANG_SPECIFIC (newdecl
))
1973 retrofit_lang_decl (newdecl
);
1975 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1979 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1981 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1982 check_default_args (newdecl
);
1984 /* Lay the type out, unless already done. */
1985 if (! same_type_p (newtype
, oldtype
)
1986 && TREE_TYPE (newdecl
) != error_mark_node
1987 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1988 layout_type (TREE_TYPE (newdecl
));
1990 if ((VAR_P (newdecl
)
1991 || TREE_CODE (newdecl
) == PARM_DECL
1992 || TREE_CODE (newdecl
) == RESULT_DECL
1993 || TREE_CODE (newdecl
) == FIELD_DECL
1994 || TREE_CODE (newdecl
) == TYPE_DECL
)
1995 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1996 layout_decl (newdecl
, 0);
1998 /* Merge the type qualifiers. */
1999 if (TREE_READONLY (newdecl
))
2000 TREE_READONLY (olddecl
) = 1;
2001 if (TREE_THIS_VOLATILE (newdecl
))
2002 TREE_THIS_VOLATILE (olddecl
) = 1;
2003 if (TREE_NOTHROW (newdecl
))
2004 TREE_NOTHROW (olddecl
) = 1;
2006 /* Merge deprecatedness. */
2007 if (TREE_DEPRECATED (newdecl
))
2008 TREE_DEPRECATED (olddecl
) = 1;
2010 /* Preserve function specific target and optimization options */
2011 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2013 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2014 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2015 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2016 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2018 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2019 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2020 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2021 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2024 /* Merge the initialization information. */
2025 if (DECL_INITIAL (newdecl
) == NULL_TREE
2026 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2028 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2029 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2030 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2032 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2033 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2037 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2039 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2040 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2041 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2042 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2043 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2044 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2045 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2046 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2047 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2048 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2049 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2050 /* Keep the old RTL. */
2051 COPY_DECL_RTL (olddecl
, newdecl
);
2053 else if (VAR_P (newdecl
)
2054 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2056 /* Keep the old RTL. We cannot keep the old RTL if the old
2057 declaration was for an incomplete object and the new
2058 declaration is not since many attributes of the RTL will
2060 COPY_DECL_RTL (olddecl
, newdecl
);
2063 /* If cannot merge, then use the new type and qualifiers,
2064 and don't preserve the old rtl. */
2067 /* Clean out any memory we had of the old declaration. */
2068 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2070 TREE_VALUE (oldstatic
) = error_mark_node
;
2072 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2073 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2074 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2075 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2078 /* Merge the storage class information. */
2079 merge_weak (newdecl
, olddecl
);
2081 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2082 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2083 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2084 if (! DECL_EXTERNAL (olddecl
))
2085 DECL_EXTERNAL (newdecl
) = 0;
2087 new_template_info
= NULL_TREE
;
2088 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2090 bool new_redefines_gnu_inline
= false;
2092 if (new_defines_function
2093 && ((DECL_INTERFACE_KNOWN (olddecl
)
2094 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2095 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2096 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2097 == FUNCTION_DECL
))))
2101 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2102 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2104 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2107 if (!new_redefines_gnu_inline
)
2109 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2110 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2111 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2113 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2114 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2115 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2117 /* If the OLDDECL is an instantiation and/or specialization,
2118 then the NEWDECL must be too. But, it may not yet be marked
2119 as such if the caller has created NEWDECL, but has not yet
2120 figured out that it is a redeclaration. */
2121 if (!DECL_USE_TEMPLATE (newdecl
))
2122 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2124 /* Don't really know how much of the language-specific
2125 values we should copy from old to new. */
2126 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2127 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2128 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2129 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2131 if (LANG_DECL_HAS_MIN (newdecl
))
2133 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2134 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2135 if (DECL_TEMPLATE_INFO (newdecl
))
2137 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2138 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2139 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2140 /* Remember the presence of explicit specialization args. */
2141 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2142 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2144 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2146 /* Only functions have these fields. */
2147 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2149 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2150 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2151 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2152 && DECL_HIDDEN_FRIEND_P (olddecl
)
2153 && newdecl_is_friend
);
2154 DECL_BEFRIENDING_CLASSES (newdecl
)
2155 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2156 DECL_BEFRIENDING_CLASSES (olddecl
));
2157 /* DECL_THUNKS is only valid for virtual functions,
2158 otherwise it is a DECL_FRIEND_CONTEXT. */
2159 if (DECL_VIRTUAL_P (newdecl
))
2160 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2162 /* Only variables have this field. */
2163 else if (VAR_P (newdecl
)
2164 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2165 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2168 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2172 /* Merge parameter attributes. */
2173 tree oldarg
, newarg
;
2174 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2175 newarg
= DECL_ARGUMENTS(newdecl
);
2177 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2178 DECL_ATTRIBUTES (newarg
)
2179 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2180 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2183 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2184 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2186 /* If newdecl is not a specialization, then it is not a
2187 template-related function at all. And that means that we
2188 should have exited above, returning 0. */
2189 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2191 if (DECL_ODR_USED (olddecl
))
2192 /* From [temp.expl.spec]:
2194 If a template, a member template or the member of a class
2195 template is explicitly specialized then that
2196 specialization shall be declared before the first use of
2197 that specialization that would cause an implicit
2198 instantiation to take place, in every translation unit in
2199 which such a use occurs. */
2200 error ("explicit specialization of %qD after first use",
2203 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2204 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2205 && DECL_DECLARED_INLINE_P (newdecl
));
2207 /* Don't propagate visibility from the template to the
2208 specialization here. We'll do that in determine_visibility if
2210 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2212 /* [temp.expl.spec/14] We don't inline explicit specialization
2213 just because the primary template says so. */
2215 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2216 the always_inline attribute. */
2217 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2218 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2220 if (DECL_DECLARED_INLINE_P (newdecl
))
2221 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2223 DECL_ATTRIBUTES (newdecl
)
2224 = remove_attribute ("always_inline",
2225 DECL_ATTRIBUTES (newdecl
));
2228 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2230 /* Never inline re-defined extern inline functions.
2231 FIXME: this could be better handled by keeping both
2232 function as separate declarations. */
2233 DECL_UNINLINABLE (newdecl
) = 1;
2237 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2238 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2240 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2242 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2243 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2245 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2246 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2247 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2248 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2251 /* Preserve abstractness on cloned [cd]tors. */
2252 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2254 /* Update newdecl's parms to point at olddecl. */
2255 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2256 parm
= DECL_CHAIN (parm
))
2257 DECL_CONTEXT (parm
) = olddecl
;
2261 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2262 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2263 COPY_DECL_RTL (newdecl
, olddecl
);
2265 if (! types_match
|| new_defines_function
)
2267 /* These need to be copied so that the names are available.
2268 Note that if the types do match, we'll preserve inline
2269 info and other bits, but if not, we won't. */
2270 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2271 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2273 /* If redeclaring a builtin function, it stays built in
2274 if newdecl is a gnu_inline definition, or if newdecl is just
2276 if (DECL_BUILT_IN (olddecl
)
2277 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2279 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2280 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2281 /* If we're keeping the built-in definition, keep the rtl,
2282 regardless of declaration matches. */
2283 COPY_DECL_RTL (olddecl
, newdecl
);
2284 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2286 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2289 /* If a compatible prototype of these builtin functions
2290 is seen, assume the runtime implements it with the
2291 expected semantics. */
2292 case BUILT_IN_STPCPY
:
2293 if (builtin_decl_explicit_p (fncode
))
2294 set_builtin_decl_implicit_p (fncode
, true);
2301 if (new_defines_function
)
2302 /* If defining a function declared with other language
2303 linkage, use the previously declared language linkage. */
2304 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2305 else if (types_match
)
2307 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2308 /* Don't clear out the arguments if we're just redeclaring a
2310 if (DECL_ARGUMENTS (olddecl
))
2311 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2314 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2315 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2317 /* Now preserve various other info from the definition. */
2318 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2319 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2320 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2321 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2323 /* Warn about conflicting visibility specifications. */
2324 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2325 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2326 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2328 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2329 "%qD: visibility attribute ignored because it "
2330 "conflicts with previous declaration", newdecl
))
2331 inform (DECL_SOURCE_LOCATION (olddecl
),
2332 "previous declaration of %qD", olddecl
);
2334 /* Choose the declaration which specified visibility. */
2335 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2337 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2338 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2340 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2341 so keep this behavior. */
2342 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2344 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2345 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2347 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2348 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2350 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2351 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2353 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2354 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2355 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2357 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2358 with that from NEWDECL below. */
2359 if (DECL_LANG_SPECIFIC (olddecl
))
2361 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2362 != DECL_LANG_SPECIFIC (newdecl
));
2363 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2366 /* Merge the USED information. */
2367 if (TREE_USED (olddecl
))
2368 TREE_USED (newdecl
) = 1;
2369 else if (TREE_USED (newdecl
))
2370 TREE_USED (olddecl
) = 1;
2371 if (VAR_P (newdecl
))
2373 if (DECL_READ_P (olddecl
))
2374 DECL_READ_P (newdecl
) = 1;
2375 else if (DECL_READ_P (newdecl
))
2376 DECL_READ_P (olddecl
) = 1;
2378 if (DECL_PRESERVE_P (olddecl
))
2379 DECL_PRESERVE_P (newdecl
) = 1;
2380 else if (DECL_PRESERVE_P (newdecl
))
2381 DECL_PRESERVE_P (olddecl
) = 1;
2383 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2384 to olddecl and deleted. */
2385 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2386 && DECL_FUNCTION_VERSIONED (olddecl
))
2388 /* Set the flag for newdecl so that it gets copied to olddecl. */
2389 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2390 /* newdecl will be purged after copying to olddecl and is no longer
2392 cgraph_node::delete_function_version (newdecl
);
2395 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2398 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2400 function_size
= sizeof (struct tree_decl_common
);
2402 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2403 (char *) newdecl
+ sizeof (struct tree_common
),
2404 function_size
- sizeof (struct tree_common
));
2406 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2407 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2408 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2410 /* Preserve symtab node mapping. */
2411 olddecl
->decl_with_vis
.symtab_node
= snode
;
2413 if (new_template_info
)
2414 /* If newdecl is a template instantiation, it is possible that
2415 the following sequence of events has occurred:
2417 o A friend function was declared in a class template. The
2418 class template was instantiated.
2420 o The instantiation of the friend declaration was
2421 recorded on the instantiation list, and is newdecl.
2423 o Later, however, instantiate_class_template called pushdecl
2424 on the newdecl to perform name injection. But, pushdecl in
2425 turn called duplicate_decls when it discovered that another
2426 declaration of a global function with the same name already
2429 o Here, in duplicate_decls, we decided to clobber newdecl.
2431 If we're going to do that, we'd better make sure that
2432 olddecl, and not newdecl, is on the list of
2433 instantiations so that if we try to do the instantiation
2434 again we won't get the clobbered declaration. */
2435 reregister_specialization (newdecl
,
2441 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2443 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2444 (char *) newdecl
+ sizeof (struct tree_common
),
2445 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2446 switch (TREE_CODE (newdecl
))
2456 struct symtab_node
*snode
= NULL
;
2458 if (TREE_CODE (newdecl
) == VAR_DECL
2459 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2460 snode
= symtab_node::get (olddecl
);
2461 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2462 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2463 size
- sizeof (struct tree_decl_common
)
2464 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2465 if (TREE_CODE (newdecl
) == VAR_DECL
)
2466 olddecl
->decl_with_vis
.symtab_node
= snode
;
2470 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2471 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2472 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2473 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2478 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2479 || TREE_CODE (newdecl
) == VAR_DECL
)
2481 if (DECL_EXTERNAL (olddecl
)
2482 || TREE_PUBLIC (olddecl
)
2483 || TREE_STATIC (olddecl
))
2485 /* Merge the section attribute.
2486 We want to issue an error if the sections conflict but that must be
2487 done later in decl_attributes since we are called before attributes
2489 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2490 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2492 if (DECL_ONE_ONLY (newdecl
))
2494 struct symtab_node
*oldsym
, *newsym
;
2495 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2496 oldsym
= cgraph_node::get_create (olddecl
);
2498 oldsym
= varpool_node::get_create (olddecl
);
2499 newsym
= symtab_node::get (newdecl
);
2500 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2504 if (TREE_CODE (newdecl
) == VAR_DECL
2505 && DECL_THREAD_LOCAL_P (newdecl
))
2506 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2509 DECL_UID (olddecl
) = olddecl_uid
;
2511 DECL_FRIEND_P (olddecl
) = 1;
2514 DECL_ANTICIPATED (olddecl
) = 1;
2515 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2518 /* NEWDECL contains the merged attribute lists.
2519 Update OLDDECL to be the same. */
2520 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2522 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2523 so that encode_section_info has a chance to look at the new decl
2524 flags and attributes. */
2525 if (DECL_RTL_SET_P (olddecl
)
2526 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2528 && TREE_STATIC (olddecl
))))
2529 make_decl_rtl (olddecl
);
2531 /* The NEWDECL will no longer be needed. Because every out-of-class
2532 declaration of a member results in a call to duplicate_decls,
2533 freeing these nodes represents in a significant savings.
2535 Before releasing the node, be sore to remove function from symbol
2536 table that might have been inserted there to record comdat group.
2537 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2538 structure is shared in between newdecl and oldecl. */
2539 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2540 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2541 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2542 || TREE_CODE (newdecl
) == VAR_DECL
)
2544 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2553 /* Return zero if the declaration NEWDECL is valid
2554 when the declaration OLDDECL (assumed to be for the same name)
2555 has already been seen.
2556 Otherwise return an error message format string with a %s
2557 where the identifier should go. */
2560 redeclaration_error_message (tree newdecl
, tree olddecl
)
2562 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2564 /* Because C++ can put things into name space for free,
2565 constructs like "typedef struct foo { ... } foo"
2566 would look like an erroneous redeclaration. */
2567 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2570 return G_("redefinition of %q#D");
2572 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2574 /* If this is a pure function, its olddecl will actually be
2575 the original initialization to `0' (which we force to call
2576 abort()). Don't complain about redefinition in this case. */
2577 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2578 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2581 /* If both functions come from different namespaces, this is not
2582 a redeclaration - this is a conflict with a used function. */
2583 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2584 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2585 && ! decls_match (olddecl
, newdecl
))
2586 return G_("%qD conflicts with used function");
2588 /* We'll complain about linkage mismatches in
2589 warn_extern_redeclared_static. */
2591 /* Defining the same name twice is no good. */
2592 if (DECL_INITIAL (olddecl
) != NULL_TREE
2593 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2595 if (DECL_NAME (olddecl
) == NULL_TREE
)
2596 return G_("%q#D not declared in class");
2597 else if (!GNU_INLINE_P (olddecl
)
2598 || GNU_INLINE_P (newdecl
))
2599 return G_("redefinition of %q#D");
2602 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2604 bool olda
= GNU_INLINE_P (olddecl
);
2605 bool newa
= GNU_INLINE_P (newdecl
);
2610 return G_("%q+D redeclared inline with "
2611 "%<gnu_inline%> attribute");
2613 return G_("%q+D redeclared inline without "
2614 "%<gnu_inline%> attribute");
2618 check_abi_tag_redeclaration
2619 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2620 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2624 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2628 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2630 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2631 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2632 return G_("redefinition of %q#D");
2636 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2637 || (DECL_TEMPLATE_RESULT (newdecl
)
2638 == DECL_TEMPLATE_RESULT (olddecl
)))
2641 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2642 if (DECL_TEMPLATE_INFO (nt
))
2643 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2644 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2645 if (DECL_TEMPLATE_INFO (ot
))
2646 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2647 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2648 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2649 return G_("redefinition of %q#D");
2651 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2653 bool olda
= GNU_INLINE_P (ot
);
2654 bool newa
= GNU_INLINE_P (nt
);
2659 return G_("%q+D redeclared inline with "
2660 "%<gnu_inline%> attribute");
2662 return G_("%q+D redeclared inline without "
2663 "%<gnu_inline%> attribute");
2667 /* Core issue #226 (C++0x):
2669 If a friend function template declaration specifies a
2670 default template-argument, that declaration shall be a
2671 definition and shall be the only declaration of the
2672 function template in the translation unit. */
2673 if ((cxx_dialect
!= cxx98
)
2674 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2675 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2676 /*is_primary=*/true,
2677 /*is_partial=*/false,
2678 /*is_friend_decl=*/2))
2679 return G_("redeclaration of friend %q#D "
2680 "may not have default template arguments");
2684 else if (VAR_P (newdecl
)
2685 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2686 && (! DECL_LANG_SPECIFIC (olddecl
)
2687 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2688 || DECL_THREAD_LOCAL_P (newdecl
)))
2690 /* Only variables can be thread-local, and all declarations must
2691 agree on this property. */
2692 if (DECL_THREAD_LOCAL_P (newdecl
))
2693 return G_("thread-local declaration of %q#D follows "
2694 "non-thread-local declaration");
2696 return G_("non-thread-local declaration of %q#D follows "
2697 "thread-local declaration");
2699 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2701 /* The objects have been declared at namespace scope. If either
2702 is a member of an anonymous union, then this is an invalid
2703 redeclaration. For example:
2709 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2710 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2711 return G_("redeclaration of %q#D");
2712 /* If at least one declaration is a reference, there is no
2713 conflict. For example:
2719 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2721 /* Reject two definitions. */
2722 return G_("redefinition of %q#D");
2726 /* Objects declared with block scope: */
2727 /* Reject two definitions, and reject a definition
2728 together with an external reference. */
2729 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2730 return G_("redeclaration of %q#D");
2735 /* Hash and equality functions for the named_label table. */
2738 named_label_hasher::hash (named_label_entry
*ent
)
2740 return DECL_UID (ent
->label_decl
);
2744 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2746 return a
->label_decl
== b
->label_decl
;
2749 /* Create a new label, named ID. */
2752 make_label_decl (tree id
, int local_p
)
2754 struct named_label_entry
*ent
;
2757 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2759 DECL_CONTEXT (decl
) = current_function_decl
;
2760 DECL_MODE (decl
) = VOIDmode
;
2761 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2763 /* Say where one reference is to the label, for the sake of the
2764 error if it is not defined. */
2765 DECL_SOURCE_LOCATION (decl
) = input_location
;
2767 /* Record the fact that this identifier is bound to this label. */
2768 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2770 /* Create the label htab for the function on demand. */
2772 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2774 /* Record this label on the list of labels used in this function.
2775 We do this before calling make_label_decl so that we get the
2776 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2777 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2778 ent
->label_decl
= decl
;
2780 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2781 gcc_assert (*slot
== NULL
);
2787 /* Look for a label named ID in the current function. If one cannot
2788 be found, create one. (We keep track of used, but undefined,
2789 labels, and complain about them at the end of a function.) */
2792 lookup_label_1 (tree id
)
2796 /* You can't use labels at global scope. */
2797 if (current_function_decl
== NULL_TREE
)
2799 error ("label %qE referenced outside of any function", id
);
2803 /* See if we've already got this label. */
2804 decl
= IDENTIFIER_LABEL_VALUE (id
);
2805 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2808 decl
= make_label_decl (id
, /*local_p=*/0);
2812 /* Wrapper for lookup_label_1. */
2815 lookup_label (tree id
)
2818 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2819 ret
= lookup_label_1 (id
);
2820 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2824 /* Declare a local label named ID. */
2827 declare_local_label (tree id
)
2830 cp_label_binding bind
;
2832 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2833 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2834 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2836 decl
= make_label_decl (id
, /*local_p=*/1);
2838 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2843 /* Returns nonzero if it is ill-formed to jump past the declaration of
2844 DECL. Returns 2 if it's also a real problem. */
2847 decl_jump_unsafe (tree decl
)
2849 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2850 with automatic storage duration is not in scope to a point where it is
2851 in scope is ill-formed unless the variable has scalar type, class type
2852 with a trivial default constructor and a trivial destructor, a
2853 cv-qualified version of one of these types, or an array of one of the
2854 preceding types and is declared without an initializer (8.5). */
2855 tree type
= TREE_TYPE (decl
);
2857 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2858 || type
== error_mark_node
)
2861 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2862 || variably_modified_type_p (type
, NULL_TREE
))
2865 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2871 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2874 identify_goto (tree decl
, const location_t
*locus
)
2876 bool complained
= (decl
2877 ? permerror (input_location
, "jump to label %qD", decl
)
2878 : permerror (input_location
, "jump to case label"));
2879 if (complained
&& locus
)
2880 inform (*locus
, " from here");
2884 /* Check that a single previously seen jump to a newly defined label
2885 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2886 the jump context; NAMES are the names in scope in LEVEL at the jump
2887 context; LOCUS is the source position of the jump or 0. Returns
2888 true if all is well. */
2891 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2892 bool exited_omp
, const location_t
*locus
)
2894 cp_binding_level
*b
;
2895 bool identified
= false, complained
= false;
2896 bool saw_eh
= false, saw_omp
= false;
2900 complained
= identify_goto (decl
, locus
);
2902 inform (input_location
, " exits OpenMP structured block");
2903 identified
= saw_omp
= true;
2906 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2908 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2910 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2911 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2912 : TREE_CHAIN (new_decls
)))
2914 int problem
= decl_jump_unsafe (new_decls
);
2920 complained
= identify_goto (decl
, locus
);
2926 inform (input_location
,
2927 " crosses initialization of %q+#D", new_decls
);
2929 inform (input_location
, " enters scope of %q+#D which has "
2930 "non-trivial destructor", new_decls
);
2936 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2940 complained
= identify_goto (decl
, locus
);
2945 if (b
->kind
== sk_try
)
2946 inform (input_location
, " enters try block");
2948 inform (input_location
, " enters catch block");
2952 if (b
->kind
== sk_omp
&& !saw_omp
)
2956 complained
= identify_goto (decl
, locus
);
2960 inform (input_location
, " enters OpenMP structured block");
2969 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2971 check_previous_goto_1 (decl
, use
->binding_level
,
2972 use
->names_in_scope
, use
->in_omp_scope
,
2973 &use
->o_goto_locus
);
2977 check_switch_goto (cp_binding_level
* level
)
2979 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2982 /* Check that a new jump to a label DECL is OK. Called by
2983 finish_goto_stmt. */
2986 check_goto (tree decl
)
2988 struct named_label_entry
*ent
, dummy
;
2989 bool saw_catch
= false, identified
= false, complained
= false;
2993 /* We can't know where a computed goto is jumping.
2994 So we assume that it's OK. */
2995 if (TREE_CODE (decl
) != LABEL_DECL
)
2998 /* We didn't record any information about this label when we created it,
2999 and there's not much point since it's trivial to analyze as a return. */
3000 if (decl
== cdtor_label
)
3003 dummy
.label_decl
= decl
;
3004 ent
= named_labels
->find (&dummy
);
3005 gcc_assert (ent
!= NULL
);
3007 /* If the label hasn't been defined yet, defer checking. */
3008 if (! DECL_INITIAL (decl
))
3010 struct named_label_use_entry
*new_use
;
3012 /* Don't bother creating another use if the last goto had the
3013 same data, and will therefore create the same set of errors. */
3015 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3018 new_use
= ggc_alloc
<named_label_use_entry
> ();
3019 new_use
->binding_level
= current_binding_level
;
3020 new_use
->names_in_scope
= current_binding_level
->names
;
3021 new_use
->o_goto_locus
= input_location
;
3022 new_use
->in_omp_scope
= false;
3024 new_use
->next
= ent
->uses
;
3025 ent
->uses
= new_use
;
3029 if (ent
->in_try_scope
|| ent
->in_catch_scope
3030 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3032 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3034 inform (input_location
, " from here");
3038 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3040 int u
= decl_jump_unsafe (bad
);
3042 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3044 /* Can't skip init of __exception_info. */
3046 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3049 else if (complained
)
3052 inform (input_location
, " skips initialization of %q+#D", bad
);
3054 inform (input_location
, " enters scope of %q+#D which has "
3055 "non-trivial destructor", bad
);
3061 if (ent
->in_try_scope
)
3062 inform (input_location
, " enters try block");
3063 else if (ent
->in_catch_scope
&& !saw_catch
)
3064 inform (input_location
, " enters catch block");
3067 if (ent
->in_omp_scope
)
3070 inform (input_location
, " enters OpenMP structured block");
3072 else if (flag_openmp
)
3074 cp_binding_level
*b
;
3075 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3077 if (b
== ent
->binding_level
)
3079 if (b
->kind
== sk_omp
)
3083 complained
= permerror (input_location
,
3084 "jump to label %q+D", decl
);
3086 inform (input_location
, " from here");
3090 inform (input_location
, " exits OpenMP structured block");
3097 /* Check that a return is ok wrt OpenMP structured blocks.
3098 Called by finish_return_stmt. Returns true if all is well. */
3101 check_omp_return (void)
3103 cp_binding_level
*b
;
3104 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3105 if (b
->kind
== sk_omp
)
3107 error ("invalid exit from OpenMP structured block");
3110 else if (b
->kind
== sk_function_parms
)
3115 /* Define a label, specifying the location in the source file.
3116 Return the LABEL_DECL node for the label. */
3119 define_label_1 (location_t location
, tree name
)
3121 struct named_label_entry
*ent
, dummy
;
3122 cp_binding_level
*p
;
3125 decl
= lookup_label (name
);
3127 dummy
.label_decl
= decl
;
3128 ent
= named_labels
->find (&dummy
);
3129 gcc_assert (ent
!= NULL
);
3131 /* After labels, make any new cleanups in the function go into their
3132 own new (temporary) binding contour. */
3133 for (p
= current_binding_level
;
3134 p
->kind
!= sk_function_parms
;
3136 p
->more_cleanups_ok
= 0;
3138 if (name
== get_identifier ("wchar_t"))
3139 permerror (input_location
, "label named wchar_t");
3141 if (DECL_INITIAL (decl
) != NULL_TREE
)
3143 error ("duplicate label %qD", decl
);
3144 return error_mark_node
;
3148 struct named_label_use_entry
*use
;
3150 /* Mark label as having been defined. */
3151 DECL_INITIAL (decl
) = error_mark_node
;
3152 /* Say where in the source. */
3153 DECL_SOURCE_LOCATION (decl
) = location
;
3155 ent
->binding_level
= current_binding_level
;
3156 ent
->names_in_scope
= current_binding_level
->names
;
3158 for (use
= ent
->uses
; use
; use
= use
->next
)
3159 check_previous_goto (decl
, use
);
3166 /* Wrapper for define_label_1. */
3169 define_label (location_t location
, tree name
)
3172 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3173 ret
= define_label_1 (location
, name
);
3174 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3181 cp_binding_level
*level
;
3182 struct cp_switch
*next
;
3183 /* The SWITCH_STMT being built. */
3185 /* A splay-tree mapping the low element of a case range to the high
3186 element, or NULL_TREE if there is no high element. Used to
3187 determine whether or not a new case label duplicates an old case
3188 label. We need a tree, rather than simply a hash table, because
3189 of the GNU case range extension. */
3193 /* A stack of the currently active switch statements. The innermost
3194 switch statement is on the top of the stack. There is no need to
3195 mark the stack for garbage collection because it is only active
3196 during the processing of the body of a function, and we never
3197 collect at that point. */
3199 static struct cp_switch
*switch_stack
;
3201 /* Called right after a switch-statement condition is parsed.
3202 SWITCH_STMT is the switch statement being parsed. */
3205 push_switch (tree switch_stmt
)
3207 struct cp_switch
*p
= XNEW (struct cp_switch
);
3208 p
->level
= current_binding_level
;
3209 p
->next
= switch_stack
;
3210 p
->switch_stmt
= switch_stmt
;
3211 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3218 struct cp_switch
*cs
= switch_stack
;
3219 location_t switch_location
;
3221 /* Emit warnings as needed. */
3222 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3223 if (!processing_template_decl
)
3224 c_do_switch_warnings (cs
->cases
, switch_location
,
3225 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3226 SWITCH_STMT_COND (cs
->switch_stmt
));
3228 splay_tree_delete (cs
->cases
);
3229 switch_stack
= switch_stack
->next
;
3233 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3234 condition. Note that if TYPE and VALUE are already integral we don't
3235 really do the conversion because the language-independent
3236 warning/optimization code will work better that way. */
3239 case_conversion (tree type
, tree value
)
3241 if (value
== NULL_TREE
)
3244 if (cxx_dialect
>= cxx11
3245 && (SCOPED_ENUM_P (type
)
3246 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3248 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3249 type
= type_promotes_to (type
);
3250 value
= (perform_implicit_conversion_flags
3251 (type
, value
, tf_warning_or_error
,
3252 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3254 return cxx_constant_value (value
);
3257 /* Note that we've seen a definition of a case label, and complain if this
3258 is a bad place for one. */
3261 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3264 cp_binding_level
*p
;
3267 if (processing_template_decl
)
3271 /* For templates, just add the case label; we'll do semantic
3272 analysis at instantiation-time. */
3273 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3274 return add_stmt (build_case_label (low_value
, high_value
, label
));
3277 /* Find the condition on which this switch statement depends. */
3278 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3279 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3280 cond
= TREE_VALUE (cond
);
3282 if (!check_switch_goto (switch_stack
->level
))
3283 return error_mark_node
;
3285 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3287 low_value
= case_conversion (type
, low_value
);
3288 high_value
= case_conversion (type
, high_value
);
3290 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3291 low_value
, high_value
);
3293 /* After labels, make any new cleanups in the function go into their
3294 own new (temporary) binding contour. */
3295 for (p
= current_binding_level
;
3296 p
->kind
!= sk_function_parms
;
3298 p
->more_cleanups_ok
= 0;
3303 struct typename_info
{
3311 struct typename_hasher
: ggc_hasher
<tree
>
3313 typedef typename_info
*compare_type
;
3315 /* Hash a TYPENAME_TYPE. */
3322 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3323 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3328 /* Compare two TYPENAME_TYPEs. */
3331 equal (tree t1
, const typename_info
*t2
)
3333 return (TYPE_IDENTIFIER (t1
) == t2
->name
3334 && TYPE_CONTEXT (t1
) == t2
->scope
3335 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3336 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3337 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3341 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3342 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3344 Returns the new TYPENAME_TYPE. */
3346 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3349 build_typename_type (tree context
, tree name
, tree fullname
,
3350 enum tag_types tag_type
)
3358 if (typename_htab
== NULL
)
3359 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3361 ti
.scope
= FROB_CONTEXT (context
);
3363 ti
.template_id
= fullname
;
3364 ti
.enum_p
= tag_type
== enum_type
;
3365 ti
.class_p
= (tag_type
== class_type
3366 || tag_type
== record_type
3367 || tag_type
== union_type
);
3368 hash
= (htab_hash_pointer (ti
.scope
)
3369 ^ htab_hash_pointer (ti
.name
));
3371 /* See if we already have this type. */
3372 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3377 /* Build the TYPENAME_TYPE. */
3378 t
= cxx_make_type (TYPENAME_TYPE
);
3379 TYPE_CONTEXT (t
) = ti
.scope
;
3380 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3381 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3382 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3384 /* Build the corresponding TYPE_DECL. */
3385 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3386 TYPE_NAME (TREE_TYPE (d
)) = d
;
3387 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3388 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3389 DECL_ARTIFICIAL (d
) = 1;
3391 /* Store it in the hash table. */
3394 /* TYPENAME_TYPEs must always be compared structurally, because
3395 they may or may not resolve down to another type depending on
3396 the currently open classes. */
3397 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3403 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3404 provided to name the type. Returns an appropriate type, unless an
3405 error occurs, in which case error_mark_node is returned. If we
3406 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3407 return that, rather than the _TYPE it corresponds to, in other
3408 cases we look through the type decl. If TF_ERROR is set, complain
3409 about errors, otherwise be quiet. */
3412 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3413 tsubst_flags_t complain
)
3419 if (name
== error_mark_node
3420 || context
== NULL_TREE
3421 || context
== error_mark_node
)
3422 return error_mark_node
;
3426 if (!(TYPE_LANG_SPECIFIC (name
)
3427 && (CLASSTYPE_IS_TEMPLATE (name
)
3428 || CLASSTYPE_USE_TEMPLATE (name
))))
3429 name
= TYPE_IDENTIFIER (name
);
3431 /* Create a TEMPLATE_ID_EXPR for the type. */
3432 name
= build_nt (TEMPLATE_ID_EXPR
,
3433 CLASSTYPE_TI_TEMPLATE (name
),
3434 CLASSTYPE_TI_ARGS (name
));
3436 else if (TREE_CODE (name
) == TYPE_DECL
)
3437 name
= DECL_NAME (name
);
3441 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3443 name
= TREE_OPERAND (name
, 0);
3444 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3445 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3446 else if (TREE_CODE (name
) == OVERLOAD
)
3448 if (complain
& tf_error
)
3449 error ("%qD is not a type", name
);
3450 return error_mark_node
;
3453 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3455 if (complain
& tf_error
)
3456 error ("%qD used without template parameters", name
);
3457 return error_mark_node
;
3459 gcc_assert (identifier_p (name
));
3460 gcc_assert (TYPE_P (context
));
3462 if (!MAYBE_CLASS_TYPE_P (context
))
3464 if (complain
& tf_error
)
3465 error ("%q#T is not a class", context
);
3466 return error_mark_node
;
3469 /* When the CONTEXT is a dependent type, NAME could refer to a
3470 dependent base class of CONTEXT. But look inside it anyway
3471 if CONTEXT is a currently open scope, in case it refers to a
3472 member of the current instantiation or a non-dependent base;
3473 lookup will stop when we hit a dependent base. */
3474 if (!dependent_scope_p (context
))
3475 /* We should only set WANT_TYPE when we're a nested typename type.
3476 Then we can give better diagnostics if we find a non-type. */
3477 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3481 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3482 return build_typename_type (context
, name
, fullname
, tag_type
);
3484 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3488 if (complain
& tf_error
)
3489 error (want_template
? G_("no class template named %q#T in %q#T")
3490 : G_("no type named %q#T in %q#T"), name
, context
);
3491 return error_mark_node
;
3494 /* Pull out the template from an injected-class-name (or multiple). */
3496 t
= maybe_get_template_decl_from_type_decl (t
);
3498 if (TREE_CODE (t
) == TREE_LIST
)
3500 if (complain
& tf_error
)
3502 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3503 print_candidates (t
);
3505 return error_mark_node
;
3508 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3510 if (complain
& tf_error
)
3511 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3513 return error_mark_node
;
3515 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3517 if (complain
& tf_error
)
3518 error ("%<typename %T::%D%> names %q#T, which is not a type",
3520 return error_mark_node
;
3523 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3524 return error_mark_node
;
3526 /* If we are currently parsing a template and if T is a typedef accessed
3527 through CONTEXT then we need to remember and check access of T at
3528 template instantiation time. */
3529 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3532 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3534 /*entering_scope=*/0,
3535 tf_warning_or_error
| tf_user
);
3537 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3540 maybe_record_typedef_use (t
);
3545 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3546 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3547 in which case error_mark_node is returned.
3549 If PARM_LIST is non-NULL, also make sure that the template parameter
3550 list of TEMPLATE_DECL matches.
3552 If COMPLAIN zero, don't complain about any errors that occur. */
3555 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3556 tsubst_flags_t complain
)
3562 name
= TYPE_IDENTIFIER (name
);
3563 else if (DECL_P (name
))
3564 name
= DECL_NAME (name
);
3565 gcc_assert (identifier_p (name
));
3567 if (!dependent_type_p (context
)
3568 || currently_open_class (context
))
3570 tree tmpl
= NULL_TREE
;
3572 if (MAYBE_CLASS_TYPE_P (context
))
3573 tmpl
= lookup_field (context
, name
, 0, false);
3575 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3576 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3578 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3580 if (complain
& tf_error
)
3581 error ("no class template named %q#T in %q#T", name
, context
);
3582 return error_mark_node
;
3586 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3588 if (complain
& tf_error
)
3590 error ("template parameters do not match template %qD", tmpl
);
3591 inform (DECL_SOURCE_LOCATION (tmpl
),
3592 "%qD declared here", tmpl
);
3594 return error_mark_node
;
3597 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3599 return error_mark_node
;
3604 /* Build the UNBOUND_CLASS_TEMPLATE. */
3605 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3606 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3607 TREE_TYPE (t
) = NULL_TREE
;
3608 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3610 /* Build the corresponding TEMPLATE_DECL. */
3611 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3612 TYPE_NAME (TREE_TYPE (d
)) = d
;
3613 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3614 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3615 DECL_ARTIFICIAL (d
) = 1;
3616 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3623 /* Push the declarations of builtin types into the namespace.
3624 RID_INDEX is the index of the builtin type in the array
3625 RID_POINTERS. NAME is the name used when looking up the builtin
3626 type. TYPE is the _TYPE node for the builtin type. */
3629 record_builtin_type (enum rid rid_index
,
3633 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3634 tree tdecl
= NULL_TREE
;
3636 if ((int) rid_index
< (int) RID_MAX
)
3637 rname
= ridpointers
[(int) rid_index
];
3639 tname
= get_identifier (name
);
3641 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3642 eliminated. Built-in types should not be looked up name; their
3643 names are keywords that the parser can recognize. However, there
3644 is code in c-common.c that uses identifier_global_value to look
3645 up built-in types by name. */
3648 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3649 DECL_ARTIFICIAL (tdecl
) = 1;
3650 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3656 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3657 DECL_ARTIFICIAL (tdecl
) = 1;
3659 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3662 if (!TYPE_NAME (type
))
3663 TYPE_NAME (type
) = tdecl
;
3666 debug_hooks
->type_decl (tdecl
, 0);
3669 /* Record one of the standard Java types.
3670 * Declare it as having the given NAME.
3671 * If SIZE > 0, it is the size of one of the integral types;
3672 * otherwise it is the negative of the size of one of the other types. */
3675 record_builtin_java_type (const char* name
, int size
)
3680 type
= build_nonstandard_integer_type (size
, 0);
3681 type
= build_distinct_type_copy (type
);
3683 else if (size
> -32)
3686 /* "__java_char" or ""__java_boolean". */
3687 type
= build_nonstandard_integer_type (-size
, 1);
3688 type
= build_distinct_type_copy (type
);
3689 /* Get the signed type cached and attached to the unsigned type,
3690 so it doesn't get garbage-collected at "random" times,
3691 causing potential codegen differences out of different UIDs
3692 and different alias set numbers. */
3693 stype
= build_nonstandard_integer_type (-size
, 0);
3694 stype
= build_distinct_type_copy (stype
);
3695 TREE_CHAIN (type
) = stype
;
3696 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3699 { /* "__java_float" or ""__java_double". */
3700 type
= make_node (REAL_TYPE
);
3701 TYPE_PRECISION (type
) = - size
;
3704 record_builtin_type (RID_MAX
, name
, type
);
3705 decl
= TYPE_NAME (type
);
3707 /* Suppress generate debug symbol entries for these types,
3708 since for normal C++ they are just clutter.
3709 However, push_lang_context undoes this if extern "Java" is seen. */
3710 DECL_IGNORED_P (decl
) = 1;
3712 TYPE_FOR_JAVA (type
) = 1;
3716 /* Push a type into the namespace so that the back ends ignore it. */
3719 record_unknown_type (tree type
, const char* name
)
3721 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3722 TYPE_DECL
, get_identifier (name
), type
));
3723 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3724 DECL_IGNORED_P (decl
) = 1;
3725 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3726 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3727 TYPE_ALIGN (type
) = 1;
3728 TYPE_USER_ALIGN (type
) = 0;
3729 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3732 /* A string for which we should create an IDENTIFIER_NODE at
3735 typedef struct predefined_identifier
3737 /* The name of the identifier. */
3738 const char *const name
;
3739 /* The place where the IDENTIFIER_NODE should be stored. */
3741 /* Nonzero if this is the name of a constructor or destructor. */
3742 const int ctor_or_dtor_p
;
3743 } predefined_identifier
;
3745 /* Create all the predefined identifiers. */
3748 initialize_predefined_identifiers (void)
3750 const predefined_identifier
*pid
;
3752 /* A table of identifiers to create at startup. */
3753 static const predefined_identifier predefined_identifiers
[] = {
3754 { "C++", &lang_name_cplusplus
, 0 },
3755 { "C", &lang_name_c
, 0 },
3756 { "Java", &lang_name_java
, 0 },
3757 /* Some of these names have a trailing space so that it is
3758 impossible for them to conflict with names written by users. */
3759 { "__ct ", &ctor_identifier
, 1 },
3760 { "__base_ctor ", &base_ctor_identifier
, 1 },
3761 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3762 { "__dt ", &dtor_identifier
, 1 },
3763 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3764 { "__base_dtor ", &base_dtor_identifier
, 1 },
3765 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3766 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3767 { "nelts", &nelts_identifier
, 0 },
3768 { THIS_NAME
, &this_identifier
, 0 },
3769 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3770 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3771 { "_vptr", &vptr_identifier
, 0 },
3772 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3773 { "::", &global_scope_name
, 0 },
3774 { "std", &std_identifier
, 0 },
3778 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3780 *pid
->node
= get_identifier (pid
->name
);
3781 if (pid
->ctor_or_dtor_p
)
3782 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3786 /* Create the predefined scalar types of C,
3787 and some nodes representing standard constants (0, 1, (void *)0).
3788 Initialize the global binding level.
3789 Make definitions for built-in primitive functions. */
3792 cxx_init_decl_processing (void)
3795 tree void_ftype_ptr
;
3797 /* Create all the identifiers we need. */
3798 initialize_predefined_identifiers ();
3800 /* Create the global variables. */
3801 push_to_top_level ();
3803 current_function_decl
= NULL_TREE
;
3804 current_binding_level
= NULL
;
3805 /* Enter the global namespace. */
3806 gcc_assert (global_namespace
== NULL_TREE
);
3807 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3809 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3810 TREE_PUBLIC (global_namespace
) = 1;
3811 begin_scope (sk_namespace
, global_namespace
);
3813 if (flag_visibility_ms_compat
)
3814 default_visibility
= VISIBILITY_HIDDEN
;
3817 current_lang_name
= lang_name_c
;
3819 /* Create the `std' namespace. */
3820 push_namespace (std_identifier
);
3821 std_node
= current_namespace
;
3824 c_common_nodes_and_builtins ();
3826 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3827 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3828 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3829 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3830 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3831 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3832 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3833 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3835 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3837 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3838 truthvalue_type_node
= boolean_type_node
;
3839 truthvalue_false_node
= boolean_false_node
;
3840 truthvalue_true_node
= boolean_true_node
;
3842 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3843 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3844 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3847 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3850 delta_type_node
= ptrdiff_type_node
;
3851 vtable_index_type
= ptrdiff_type_node
;
3853 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3854 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3855 void_ftype_ptr
= build_function_type_list (void_type_node
,
3856 ptr_type_node
, NULL_TREE
);
3858 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3860 /* C++ extensions */
3862 unknown_type_node
= make_node (LANG_TYPE
);
3863 record_unknown_type (unknown_type_node
, "unknown type");
3865 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3866 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3868 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3870 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3871 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3873 init_list_type_node
= make_node (LANG_TYPE
);
3874 record_unknown_type (init_list_type_node
, "init list");
3877 /* Make sure we get a unique function type, so we can give
3878 its pointer type a name. (This wins for gdb.) */
3879 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3880 TREE_TYPE (vfunc_type
) = integer_type_node
;
3881 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3882 layout_type (vfunc_type
);
3884 vtable_entry_type
= build_pointer_type (vfunc_type
);
3886 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3889 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3890 layout_type (vtbl_type_node
);
3891 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3892 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3893 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3894 layout_type (vtbl_ptr_type_node
);
3895 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3897 push_namespace (get_identifier ("__cxxabiv1"));
3898 abi_node
= current_namespace
;
3901 global_type_node
= make_node (LANG_TYPE
);
3902 record_unknown_type (global_type_node
, "global type");
3905 current_lang_name
= lang_name_cplusplus
;
3908 tree newattrs
, extvisattr
;
3909 tree newtype
, deltype
;
3910 tree ptr_ftype_sizetype
;
3914 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3915 if (cxx_dialect
== cxx98
)
3918 tree bad_alloc_type_node
;
3919 tree bad_alloc_decl
;
3921 push_namespace (std_identifier
);
3922 bad_alloc_id
= get_identifier ("bad_alloc");
3923 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3924 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3926 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3927 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3931 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3934 new_eh_spec
= noexcept_false_spec
;
3936 /* Ensure attribs.c is initialized. */
3938 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3940 newattrs
= tree_cons (get_identifier ("alloc_size"),
3941 build_tree_list (NULL_TREE
, integer_one_node
),
3943 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3944 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3945 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3946 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3947 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3948 DECL_IS_MALLOC (opnew
) = 1;
3949 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3950 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3951 DECL_IS_MALLOC (opnew
) = 1;
3952 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3953 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3954 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3955 if (flag_sized_deallocation
)
3957 /* Also push the sized deallocation variants:
3958 void operator delete(void*, std::size_t) throw();
3959 void operator delete[](void*, std::size_t) throw(); */
3960 tree void_ftype_ptr_size
3961 = build_function_type_list (void_type_node
, ptr_type_node
,
3962 size_type_node
, NULL_TREE
);
3963 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
3965 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3966 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3967 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3970 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3971 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3972 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3973 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3974 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3975 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3976 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3977 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3981 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3982 ECF_NORETURN
| ECF_NOTHROW
);
3984 /* Perform other language dependent initializations. */
3985 init_class_processing ();
3986 init_rtti_processing ();
3987 init_template_processing ();
3989 if (flag_exceptions
)
3990 init_exception_processing ();
3992 if (! supports_one_only ())
3995 make_fname_decl
= cp_make_fname_decl
;
3996 start_fname_decls ();
3998 /* Show we use EH for cleanups. */
3999 if (flag_exceptions
)
4000 using_eh_for_cleanups ();
4003 /* Generate an initializer for a function naming variable from
4004 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4005 filled in with the type of the init. */
4008 cp_fname_init (const char* name
, tree
*type_p
)
4010 tree domain
= NULL_TREE
;
4012 tree init
= NULL_TREE
;
4017 length
= strlen (name
);
4018 domain
= build_index_type (size_int (length
));
4019 init
= build_string (length
+ 1, name
);
4022 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4023 type
= build_cplus_array_type (type
, domain
);
4028 TREE_TYPE (init
) = type
;
4030 init
= error_mark_node
;
4035 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4036 the decl, LOC is the location to give the decl, NAME is the
4037 initialization string and TYPE_DEP indicates whether NAME depended
4038 on the type of the function. We make use of that to detect
4039 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4040 at the point of first use, so we mustn't push the decl now. */
4043 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4045 const char *const name
= (type_dep
&& processing_template_decl
4046 ? NULL
: fname_as_string (type_dep
));
4048 tree init
= cp_fname_init (name
, &type
);
4049 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4052 free (CONST_CAST (char *, name
));
4054 /* As we're using pushdecl_with_scope, we must set the context. */
4055 DECL_CONTEXT (decl
) = current_function_decl
;
4057 TREE_STATIC (decl
) = 1;
4058 TREE_READONLY (decl
) = 1;
4059 DECL_ARTIFICIAL (decl
) = 1;
4061 TREE_USED (decl
) = 1;
4063 if (current_function_decl
)
4065 cp_binding_level
*b
= current_binding_level
;
4066 if (b
->kind
== sk_function_parms
)
4067 return error_mark_node
;
4068 while (b
->level_chain
->kind
!= sk_function_parms
)
4070 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4071 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4072 LOOKUP_ONLYCONVERTING
);
4076 DECL_THIS_STATIC (decl
) = true;
4077 pushdecl_top_level_and_finish (decl
, init
);
4084 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4086 tree id
= DECL_NAME (decl
);
4087 const char *name
= IDENTIFIER_POINTER (id
);
4089 retrofit_lang_decl (decl
);
4091 DECL_ARTIFICIAL (decl
) = 1;
4092 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4093 SET_DECL_LANGUAGE (decl
, lang_c
);
4094 /* Runtime library routines are, by definition, available in an
4095 external shared object. */
4096 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4097 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4099 DECL_CONTEXT (decl
) = context
;
4102 pushdecl_top_level (decl
);
4106 /* A function in the user's namespace should have an explicit
4107 declaration before it is used. Mark the built-in function as
4108 anticipated but not actually declared. */
4109 if (name
[0] != '_' || name
[1] != '_')
4110 DECL_ANTICIPATED (decl
) = 1;
4111 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4113 size_t len
= strlen (name
);
4115 /* Treat __*_chk fortification functions as anticipated as well,
4116 unless they are __builtin_*. */
4117 if (len
> strlen ("___chk")
4118 && memcmp (name
+ len
- strlen ("_chk"),
4119 "_chk", strlen ("_chk") + 1) == 0)
4120 DECL_ANTICIPATED (decl
) = 1;
4127 cxx_builtin_function (tree decl
)
4129 tree id
= DECL_NAME (decl
);
4130 const char *name
= IDENTIFIER_POINTER (id
);
4131 /* All builtins that don't begin with an '_' should additionally
4132 go in the 'std' namespace. */
4135 tree decl2
= copy_node(decl
);
4136 push_namespace (std_identifier
);
4137 builtin_function_1 (decl2
, std_node
, false);
4141 return builtin_function_1 (decl
, NULL_TREE
, false);
4144 /* Like cxx_builtin_function, but guarantee the function is added to the global
4145 scope. This is to allow function specific options to add new machine
4146 dependent builtins when the target ISA changes via attribute((target(...)))
4147 which saves space on program startup if the program does not use non-generic
4151 cxx_builtin_function_ext_scope (tree decl
)
4154 tree id
= DECL_NAME (decl
);
4155 const char *name
= IDENTIFIER_POINTER (id
);
4156 /* All builtins that don't begin with an '_' should additionally
4157 go in the 'std' namespace. */
4160 tree decl2
= copy_node(decl
);
4161 push_namespace (std_identifier
);
4162 builtin_function_1 (decl2
, std_node
, true);
4166 return builtin_function_1 (decl
, NULL_TREE
, true);
4169 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4170 function. Not called directly. */
4173 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4176 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4177 DECL_EXTERNAL (fn
) = 1;
4178 TREE_PUBLIC (fn
) = 1;
4179 DECL_ARTIFICIAL (fn
) = 1;
4180 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4181 SET_DECL_LANGUAGE (fn
, lang_c
);
4182 /* Runtime library routines are, by definition, available in an
4183 external shared object. */
4184 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4185 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4186 set_call_expr_flags (fn
, ecf_flags
);
4190 /* Returns the _DECL for a library function with C++ linkage. */
4193 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4196 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4197 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4198 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4202 /* Like build_library_fn, but takes a C string instead of an
4206 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4208 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4211 /* Like build_cp_library_fn, but takes a C string instead of an
4215 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4217 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4221 /* Like build_library_fn, but also pushes the function so that we will
4222 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4223 may throw exceptions listed in RAISES. */
4226 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4231 type
= build_exception_variant (type
, raises
);
4233 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4234 pushdecl_top_level (fn
);
4238 /* Like build_cp_library_fn, but also pushes the function so that it
4239 will be found by normal lookup. */
4242 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4245 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4250 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4254 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4258 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4260 tree type
= build_function_type (void_type_node
, parmtypes
);
4261 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4264 /* Like push_library_fn, but also note that this function throws
4265 and does not return. Used for __throw_foo and the like. */
4268 push_throw_library_fn (tree name
, tree type
)
4270 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4274 /* When we call finish_struct for an anonymous union, we create
4275 default copy constructors and such. But, an anonymous union
4276 shouldn't have such things; this function undoes the damage to the
4277 anonymous union type T.
4279 (The reason that we create the synthesized methods is that we don't
4280 distinguish `union { int i; }' from `typedef union { int i; } U'.
4281 The first is an anonymous union; the second is just an ordinary
4285 fixup_anonymous_aggr (tree t
)
4289 /* Wipe out memory of synthesized methods. */
4290 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4291 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4292 TYPE_HAS_COPY_CTOR (t
) = 0;
4293 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4294 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4295 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4297 /* Splice the implicitly generated functions out of the TYPE_METHODS
4299 q
= &TYPE_METHODS (t
);
4302 if (DECL_ARTIFICIAL (*q
))
4303 *q
= TREE_CHAIN (*q
);
4305 q
= &DECL_CHAIN (*q
);
4308 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4309 if (TYPE_METHODS (t
))
4311 tree decl
= TYPE_MAIN_DECL (t
);
4313 if (TREE_CODE (t
) != UNION_TYPE
)
4314 error_at (DECL_SOURCE_LOCATION (decl
),
4315 "an anonymous struct cannot have function members");
4317 error_at (DECL_SOURCE_LOCATION (decl
),
4318 "an anonymous union cannot have function members");
4321 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4322 assignment operators (because they cannot have these methods themselves).
4323 For anonymous unions this is already checked because they are not allowed
4324 in any union, otherwise we have to check it. */
4325 if (TREE_CODE (t
) != UNION_TYPE
)
4329 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4330 if (TREE_CODE (field
) == FIELD_DECL
)
4332 type
= TREE_TYPE (field
);
4333 if (CLASS_TYPE_P (type
))
4335 if (TYPE_NEEDS_CONSTRUCTING (type
))
4336 error ("member %q+#D with constructor not allowed "
4337 "in anonymous aggregate", field
);
4338 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4339 error ("member %q+#D with destructor not allowed "
4340 "in anonymous aggregate", field
);
4341 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4342 error ("member %q+#D with copy assignment operator "
4343 "not allowed in anonymous aggregate", field
);
4349 /* Warn for an attribute located at LOCATION that appertains to the
4350 class type CLASS_TYPE that has not been properly placed after its
4351 class-key, in it class-specifier. */
4354 warn_misplaced_attr_for_class_type (source_location location
,
4357 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4359 if (warning_at (location
, OPT_Wattributes
,
4360 "attribute ignored in declaration "
4361 "of %q#T", class_type
))
4363 "attribute for %q#T must follow the %qs keyword",
4364 class_type
, class_key_or_enum_as_string (class_type
));
4367 /* Make sure that a declaration with no declarator is well-formed, i.e.
4368 just declares a tagged type or anonymous union.
4370 Returns the type declared; or NULL_TREE if none. */
4373 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4374 bool explicit_type_instantiation_p
)
4376 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4377 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4378 /* If a class, struct, or enum type is declared by the DECLSPECS
4379 (i.e, if a class-specifier, enum-specifier, or non-typename
4380 elaborated-type-specifier appears in the DECLSPECS),
4381 DECLARED_TYPE is set to the corresponding type. */
4382 tree declared_type
= NULL_TREE
;
4383 bool error_p
= false;
4385 if (declspecs
->multiple_types_p
)
4386 error ("multiple types in one declaration");
4387 else if (declspecs
->redefined_builtin_type
)
4389 if (!in_system_header_at (input_location
))
4390 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4391 "redeclaration of C++ built-in type %qT",
4392 declspecs
->redefined_builtin_type
);
4397 && TYPE_P (declspecs
->type
)
4398 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4399 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4400 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4401 declared_type
= declspecs
->type
;
4402 else if (declspecs
->type
== error_mark_node
)
4404 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4405 permerror (input_location
, "declaration does not declare anything");
4406 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4408 error ("%<auto%> can only be specified for variables "
4409 "or function declarations");
4410 return error_mark_node
;
4412 /* Check for an anonymous union. */
4413 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4414 && TYPE_ANONYMOUS_P (declared_type
))
4416 /* 7/3 In a simple-declaration, the optional init-declarator-list
4417 can be omitted only when declaring a class (clause 9) or
4418 enumeration (7.2), that is, when the decl-specifier-seq contains
4419 either a class-specifier, an elaborated-type-specifier with
4420 a class-key (9.1), or an enum-specifier. In these cases and
4421 whenever a class-specifier or enum-specifier is present in the
4422 decl-specifier-seq, the identifiers in these specifiers are among
4423 the names being declared by the declaration (as class-name,
4424 enum-names, or enumerators, depending on the syntax). In such
4425 cases, and except for the declaration of an unnamed bit-field (9.6),
4426 the decl-specifier-seq shall introduce one or more names into the
4427 program, or shall redeclare a name introduced by a previous
4428 declaration. [Example:
4429 enum { }; // ill-formed
4430 typedef class { }; // ill-formed
4434 error ("missing type-name in typedef-declaration");
4437 /* Anonymous unions are objects, so they can have specifiers. */;
4438 SET_ANON_AGGR_TYPE_P (declared_type
);
4440 if (TREE_CODE (declared_type
) != UNION_TYPE
4441 && !in_system_header_at (input_location
))
4442 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4447 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4448 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4449 error ("%qs can only be specified for functions",
4450 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4451 ? "inline" : "virtual");
4453 && (!current_class_type
4454 || current_scope () != current_class_type
))
4455 error ("%<friend%> can only be specified inside a class");
4456 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4457 error ("%<explicit%> can only be specified for constructors");
4458 else if (declspecs
->storage_class
)
4459 error ("a storage class can only be specified for objects "
4461 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4462 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4463 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4464 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4465 error ("qualifiers can only be specified for objects "
4467 else if (saw_typedef
)
4468 warning (0, "%<typedef%> was ignored in this declaration");
4469 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4470 error ("%<constexpr%> cannot be used for type declarations");
4473 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4476 if (!CLASS_TYPE_P (declared_type
)
4477 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4478 /* For a non-template class, use the name location. */
4479 loc
= location_of (declared_type
);
4481 /* For a template class (an explicit instantiation), use the
4482 current location. */
4483 loc
= input_location
;
4485 if (explicit_type_instantiation_p
)
4486 /* [dcl.attr.grammar]/4:
4488 No attribute-specifier-seq shall appertain to an explicit
4491 if (warning_at (loc
, OPT_Wattributes
,
4492 "attribute ignored in explicit instantiation %q#T",
4495 "no attribute can be applied to "
4496 "an explicit instantiation");
4499 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4502 return declared_type
;
4505 /* Called when a declaration is seen that contains no names to declare.
4506 If its type is a reference to a structure, union or enum inherited
4507 from a containing scope, shadow that tag name for the current scope
4508 with a forward reference.
4509 If its type defines a new named structure or union
4510 or defines an enum, it is valid but we need not do anything here.
4511 Otherwise, it is an error.
4513 C++: may have to grok the declspecs to learn about static,
4514 complain for anonymous unions.
4516 Returns the TYPE declared -- or NULL_TREE if none. */
4519 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4521 tree t
= check_tag_decl (declspecs
,
4522 /*explicit_type_instantiation_p=*/false);
4527 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4530 /* This is where the variables in an anonymous union are
4531 declared. An anonymous union declaration looks like:
4533 because there is no declarator after the union, the parser
4534 sends that declaration here. */
4535 if (ANON_AGGR_TYPE_P (t
))
4537 fixup_anonymous_aggr (t
);
4539 if (TYPE_FIELDS (t
))
4541 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4542 declspecs
, NORMAL
, 0, NULL
);
4543 finish_anon_union (decl
);
4550 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4553 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4554 const cp_declarator
*declarator
,
4555 bool is_template_arg
)
4559 enum decl_context context
4560 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4561 attrs
= type_specifiers
->attributes
;
4562 type_specifiers
->attributes
= NULL_TREE
;
4563 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4564 if (attrs
&& type
!= error_mark_node
)
4566 if (CLASS_TYPE_P (type
))
4567 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4568 "outside of definition", type
);
4569 else if (MAYBE_CLASS_TYPE_P (type
))
4570 /* A template type parameter or other dependent type. */
4571 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4572 "type %qT without an associated declaration", type
);
4574 cplus_decl_attributes (&type
, attrs
, 0);
4579 /* Process a DECLARATOR for a function-scope variable declaration,
4580 namespace-scope variable declaration, or function declaration.
4581 (Function definitions go through start_function; class member
4582 declarations appearing in the body of the class go through
4583 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4584 If an error occurs, the error_mark_node is returned instead.
4586 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4587 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4588 for an explicitly defaulted function, or SD_DELETED for an explicitly
4589 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4590 implicitly initialized via a default constructor. ATTRIBUTES and
4591 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4593 The scope represented by the context of the returned DECL is pushed
4594 (if it is not the global namespace) and is assigned to
4595 *PUSHED_SCOPE_P. The caller is then responsible for calling
4596 pop_scope on *PUSHED_SCOPE_P if it is set. */
4599 start_decl (const cp_declarator
*declarator
,
4600 cp_decl_specifier_seq
*declspecs
,
4603 tree prefix_attributes
,
4604 tree
*pushed_scope_p
)
4612 *pushed_scope_p
= NULL_TREE
;
4614 /* An object declared as __attribute__((deprecated)) suppresses
4615 warnings of uses of other deprecated items. */
4616 if (lookup_attribute ("deprecated", attributes
))
4617 deprecated_state
= DEPRECATED_SUPPRESS
;
4619 attributes
= chainon (attributes
, prefix_attributes
);
4621 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4624 deprecated_state
= DEPRECATED_NORMAL
;
4626 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4627 || decl
== error_mark_node
)
4628 return error_mark_node
;
4630 context
= CP_DECL_CONTEXT (decl
);
4631 if (context
!= global_namespace
)
4632 *pushed_scope_p
= push_scope (context
);
4634 /* Is it valid for this decl to have an initializer at all?
4635 If not, set INITIALIZED to zero, which will indirectly
4636 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4638 && TREE_CODE (decl
) == TYPE_DECL
)
4640 error ("typedef %qD is initialized (use decltype instead)", decl
);
4641 return error_mark_node
;
4646 if (! toplevel_bindings_p ()
4647 && DECL_EXTERNAL (decl
))
4648 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4650 DECL_EXTERNAL (decl
) = 0;
4651 if (toplevel_bindings_p ())
4652 TREE_STATIC (decl
) = 1;
4654 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4656 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4657 record_key_method_defined (decl
);
4659 /* If this is a typedef that names the class for linkage purposes
4660 (7.1.3p8), apply any attributes directly to the type. */
4661 if (TREE_CODE (decl
) == TYPE_DECL
4662 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4663 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4664 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4668 /* Set attributes here so if duplicate decl, will have proper attributes. */
4669 cplus_decl_attributes (&decl
, attributes
, flags
);
4671 /* Dllimported symbols cannot be defined. Static data members (which
4672 can be initialized in-class and dllimported) go through grokfield,
4673 not here, so we don't need to exclude those decls when checking for
4675 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4677 error ("definition of %q#D is marked %<dllimport%>", decl
);
4678 DECL_DLLIMPORT_P (decl
) = 0;
4681 /* If #pragma weak was used, mark the decl weak now. */
4682 if (!processing_template_decl
)
4683 maybe_apply_pragma_weak (decl
);
4685 if (TREE_CODE (decl
) == FUNCTION_DECL
4686 && DECL_DECLARED_INLINE_P (decl
)
4687 && DECL_UNINLINABLE (decl
)
4688 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4689 warning (0, "inline function %q+D given attribute noinline", decl
);
4691 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4693 bool this_tmpl
= (processing_template_decl
4694 > template_class_depth (context
));
4697 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4698 if (field
== NULL_TREE
4699 || !(VAR_P (field
) || variable_template_p (field
)))
4700 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4701 else if (variable_template_p (field
) && !this_tmpl
)
4703 if (DECL_LANG_SPECIFIC (decl
)
4704 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4705 /* OK, specialization was already checked. */;
4708 error_at (DECL_SOURCE_LOCATION (decl
),
4709 "non-member-template declaration of %qD", decl
);
4710 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4711 "member template declaration here");
4712 return error_mark_node
;
4717 if (variable_template_p (field
))
4718 field
= DECL_TEMPLATE_RESULT (field
);
4720 if (DECL_CONTEXT (field
) != context
)
4722 if (!same_type_p (DECL_CONTEXT (field
), context
))
4723 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4724 "to be defined as %<%T::%D%>",
4725 DECL_CONTEXT (field
), DECL_NAME (decl
),
4726 context
, DECL_NAME (decl
));
4727 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4729 /* Static data member are tricky; an in-class initialization
4730 still doesn't provide a definition, so the in-class
4731 declaration will have DECL_EXTERNAL set, but will have an
4732 initialization. Thus, duplicate_decls won't warn
4733 about this situation, and so we check here. */
4734 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4735 error ("duplicate initialization of %qD", decl
);
4736 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4738 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4739 && !DECL_DECLARED_CONSTEXPR_P (field
))
4740 error ("%qD declared %<constexpr%> outside its class", field
);
4745 tree field
= check_classfn (context
, decl
,
4747 ? current_template_parms
4749 if (field
&& field
!= error_mark_node
4750 && duplicate_decls (decl
, field
,
4751 /*newdecl_is_friend=*/false))
4755 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4756 DECL_IN_AGGR_P (decl
) = 0;
4757 /* Do not mark DECL as an explicit specialization if it was not
4758 already marked as an instantiation; a declaration should
4759 never be marked as a specialization unless we know what
4760 template is being specialized. */
4761 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4763 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4764 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4765 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4766 && DECL_DECLARED_INLINE_P (decl
));
4768 DECL_COMDAT (decl
) = false;
4770 /* [temp.expl.spec] An explicit specialization of a static data
4771 member of a template is a definition if the declaration
4772 includes an initializer; otherwise, it is a declaration.
4774 We check for processing_specialization so this only applies
4775 to the new specialization syntax. */
4776 if (!initialized
&& processing_specialization
)
4777 DECL_EXTERNAL (decl
) = 1;
4780 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4781 /* Aliases are definitions. */
4783 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4787 was_public
= TREE_PUBLIC (decl
);
4789 /* Enter this declaration into the symbol table. */
4790 decl
= maybe_push_decl (decl
);
4792 if (processing_template_decl
)
4793 decl
= push_template_decl (decl
);
4794 if (decl
== error_mark_node
)
4795 return error_mark_node
;
4798 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4799 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4801 /* This is a const variable with implicit 'static'. Set
4802 DECL_THIS_STATIC so we can tell it from variables that are
4803 !TREE_PUBLIC because of the anonymous namespace. */
4804 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4805 DECL_THIS_STATIC (decl
) = 1;
4808 if (current_function_decl
&& VAR_P (decl
)
4809 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4812 if (DECL_THREAD_LOCAL_P (decl
))
4813 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4815 else if (TREE_STATIC (decl
))
4816 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4820 cp_function_chain
->invalid_constexpr
= true;
4823 if (!processing_template_decl
&& VAR_P (decl
))
4824 start_decl_1 (decl
, initialized
);
4829 /* Process the declaration of a variable DECL. INITIALIZED is true
4830 iff DECL is explicitly initialized. (INITIALIZED is false if the
4831 variable is initialized via an implicitly-called constructor.)
4832 This function must be called for ordinary variables (including, for
4833 example, implicit instantiations of templates), but must not be
4834 called for template declarations. */
4837 start_decl_1 (tree decl
, bool initialized
)
4841 bool aggregate_definition_p
;
4843 gcc_assert (!processing_template_decl
);
4845 if (error_operand_p (decl
))
4848 gcc_assert (VAR_P (decl
));
4850 type
= TREE_TYPE (decl
);
4851 complete_p
= COMPLETE_TYPE_P (type
);
4852 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4854 /* If an explicit initializer is present, or if this is a definition
4855 of an aggregate, then we need a complete type at this point.
4856 (Scalars are always complete types, so there is nothing to
4857 check.) This code just sets COMPLETE_P; errors (if necessary)
4858 are issued below. */
4859 if ((initialized
|| aggregate_definition_p
)
4861 && COMPLETE_TYPE_P (complete_type (type
)))
4864 /* We will not yet have set TREE_READONLY on DECL if the type
4865 was "const", but incomplete, before this point. But, now, we
4866 have a complete type, so we can try again. */
4867 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4871 /* Is it valid for this decl to have an initializer at all? */
4873 /* Don't allow initializations for incomplete types except for
4874 arrays which might be completed by the initialization. */
4876 ; /* A complete type is ok. */
4877 else if (type_uses_auto (type
))
4878 ; /* An auto type is ok. */
4879 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4881 error ("variable %q#D has initializer but incomplete type", decl
);
4882 type
= TREE_TYPE (decl
) = error_mark_node
;
4884 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4886 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4887 error ("elements of array %q#D have incomplete type", decl
);
4888 /* else we already gave an error in start_decl. */
4891 else if (aggregate_definition_p
&& !complete_p
)
4893 if (type_uses_auto (type
))
4894 error ("declaration of %q#D has no initializer", decl
);
4896 error ("aggregate %q#D has incomplete type and cannot be defined",
4898 /* Change the type so that assemble_variable will give
4899 DECL an rtl we can live with: (mem (const_int 0)). */
4900 type
= TREE_TYPE (decl
) = error_mark_node
;
4903 /* Create a new scope to hold this declaration if necessary.
4904 Whether or not a new scope is necessary cannot be determined
4905 until after the type has been completed; if the type is a
4906 specialization of a class template it is not until after
4907 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4908 will be set correctly. */
4909 maybe_push_cleanup_level (type
);
4912 /* Handle initialization of references. DECL, TYPE, and INIT have the
4913 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4914 but will be set to a new CLEANUP_STMT if a temporary is created
4915 that must be destroyed subsequently.
4917 Returns an initializer expression to use to initialize DECL, or
4918 NULL if the initialization can be performed statically.
4920 Quotes on semantics can be found in ARM 8.4.3. */
4923 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4925 if (init
== NULL_TREE
)
4927 if ((DECL_LANG_SPECIFIC (decl
) == 0
4928 || DECL_IN_AGGR_P (decl
) == 0)
4929 && ! DECL_THIS_EXTERN (decl
))
4930 error ("%qD declared as reference but not initialized", decl
);
4934 if (TREE_CODE (init
) == TREE_LIST
)
4935 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4936 tf_warning_or_error
);
4938 tree ttype
= TREE_TYPE (type
);
4939 if (TREE_CODE (ttype
) != ARRAY_TYPE
4940 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4941 /* Note: default conversion is only called in very special cases. */
4942 init
= decay_conversion (init
, tf_warning_or_error
);
4944 /* check_initializer handles this for non-reference variables, but for
4945 references we need to do it here or the initializer will get the
4946 incomplete array type and confuse later calls to
4947 cp_complete_array_type. */
4948 if (TREE_CODE (ttype
) == ARRAY_TYPE
4949 && TYPE_DOMAIN (ttype
) == NULL_TREE
4950 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
4951 || TREE_CODE (init
) == STRING_CST
))
4953 cp_complete_array_type (&ttype
, init
, false);
4954 if (ttype
!= TREE_TYPE (type
))
4955 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
4958 /* Convert INIT to the reference type TYPE. This may involve the
4959 creation of a temporary, whose lifetime must be the same as that
4960 of the reference. If so, a DECL_EXPR for the temporary will be
4961 added just after the DECL_EXPR for DECL. That's why we don't set
4962 DECL_INITIAL for local references (instead assigning to them
4963 explicitly); we need to allow the temporary to be initialized
4965 return initialize_reference (type
, init
, flags
,
4966 tf_warning_or_error
);
4969 /* Designated initializers in arrays are not supported in GNU C++.
4970 The parser cannot detect this error since it does not know whether
4971 a given brace-enclosed initializer is for a class type or for an
4972 array. This function checks that CE does not use a designated
4973 initializer. If it does, an error is issued. Returns true if CE
4974 is valid, i.e., does not have a designated initializer. */
4977 check_array_designated_initializer (constructor_elt
*ce
,
4978 unsigned HOST_WIDE_INT index
)
4980 /* Designated initializers for array elements are not supported. */
4983 /* The parser only allows identifiers as designated
4985 if (ce
->index
== error_mark_node
)
4987 error ("name used in a GNU-style designated "
4988 "initializer for an array");
4991 else if (identifier_p (ce
->index
))
4993 error ("name %qD used in a GNU-style designated "
4994 "initializer for an array", ce
->index
);
4998 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5001 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5002 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5005 /* A C99 designator is OK if it matches the current index. */
5006 if (wi::eq_p (ce_index
, index
))
5009 sorry ("non-trivial designated initializers not supported");
5012 error ("C99 designator %qE is not an integral constant-expression",
5021 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5022 array until we finish parsing the initializer. If that's the
5023 situation we're in, update DECL accordingly. */
5026 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5028 tree type
= TREE_TYPE (decl
);
5030 if (TREE_CODE (type
) == ARRAY_TYPE
5031 && TYPE_DOMAIN (type
) == NULL_TREE
5032 && TREE_CODE (decl
) != TYPE_DECL
)
5034 /* do_default is really a C-ism to deal with tentative definitions.
5035 But let's leave it here to ease the eventual merge. */
5036 int do_default
= !DECL_EXTERNAL (decl
);
5037 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5040 /* Check that there are no designated initializers in INIT, as
5041 those are not supported in GNU C++, and as the middle-end
5042 will crash if presented with a non-numeric designated
5044 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5046 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5047 constructor_elt
*ce
;
5049 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5050 if (!check_array_designated_initializer (ce
, i
))
5056 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5060 error ("initializer fails to determine size of %qD", decl
);
5062 else if (failure
== 2)
5066 error ("array size missing in %qD", decl
);
5068 /* If a `static' var's size isn't known, make it extern as
5069 well as static, so it does not get allocated. If it's not
5070 `static', then don't mark it extern; finish_incomplete_decl
5071 will give it a default size and it will get allocated. */
5072 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5073 DECL_EXTERNAL (decl
) = 1;
5075 else if (failure
== 3)
5077 error ("zero-size array %qD", decl
);
5081 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5083 relayout_decl (decl
);
5087 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5088 any appropriate error messages regarding the layout. */
5091 layout_var_decl (tree decl
)
5095 type
= TREE_TYPE (decl
);
5096 if (type
== error_mark_node
)
5099 /* If we haven't already laid out this declaration, do so now.
5100 Note that we must not call complete type for an external object
5101 because it's type might involve templates that we are not
5102 supposed to instantiate yet. (And it's perfectly valid to say
5103 `extern X x' for some incomplete type `X'.) */
5104 if (!DECL_EXTERNAL (decl
))
5105 complete_type (type
);
5106 if (!DECL_SIZE (decl
)
5107 && TREE_TYPE (decl
) != error_mark_node
5108 && (COMPLETE_TYPE_P (type
)
5109 || (TREE_CODE (type
) == ARRAY_TYPE
5110 && !TYPE_DOMAIN (type
)
5111 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5112 layout_decl (decl
, 0);
5114 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5116 /* An automatic variable with an incomplete type: that is an error.
5117 Don't talk about array types here, since we took care of that
5118 message in grokdeclarator. */
5119 error ("storage size of %qD isn%'t known", decl
);
5120 TREE_TYPE (decl
) = error_mark_node
;
5123 /* Keep this code around in case we later want to control debug info
5124 based on whether a type is "used". (jason 1999-11-11) */
5126 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5127 /* Let debugger know it should output info for this type. */
5128 note_debug_info_needed (ttype
);
5130 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5131 note_debug_info_needed (DECL_CONTEXT (decl
));
5134 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5135 && DECL_SIZE (decl
) != NULL_TREE
5136 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5138 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5139 constant_expression_warning (DECL_SIZE (decl
));
5142 error ("storage size of %qD isn%'t constant", decl
);
5143 TREE_TYPE (decl
) = error_mark_node
;
5148 /* If a local static variable is declared in an inline function, or if
5149 we have a weak definition, we must endeavor to create only one
5150 instance of the variable at link-time. */
5153 maybe_commonize_var (tree decl
)
5155 /* Static data in a function with comdat linkage also has comdat
5157 if (TREE_STATIC (decl
)
5158 /* Don't mess with __FUNCTION__. */
5159 && ! DECL_ARTIFICIAL (decl
)
5160 && DECL_FUNCTION_SCOPE_P (decl
)
5161 && vague_linkage_p (DECL_CONTEXT (decl
)))
5165 /* With weak symbols, we simply make the variable COMDAT;
5166 that will cause copies in multiple translations units to
5168 comdat_linkage (decl
);
5172 if (DECL_INITIAL (decl
) == NULL_TREE
5173 || DECL_INITIAL (decl
) == error_mark_node
)
5175 /* Without weak symbols, we can use COMMON to merge
5176 uninitialized variables. */
5177 TREE_PUBLIC (decl
) = 1;
5178 DECL_COMMON (decl
) = 1;
5182 /* While for initialized variables, we must use internal
5183 linkage -- which means that multiple copies will not
5185 TREE_PUBLIC (decl
) = 0;
5186 DECL_COMMON (decl
) = 0;
5187 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5188 "sorry: semantics of inline function static "
5189 "data %q#D are wrong (you%'ll wind up "
5190 "with multiple copies)", decl
))
5191 inform (DECL_SOURCE_LOCATION (decl
),
5192 "you can work around this by removing the initializer");
5198 /* Issue an error message if DECL is an uninitialized const variable. */
5201 check_for_uninitialized_const_var (tree decl
)
5203 tree type
= strip_array_types (TREE_TYPE (decl
));
5205 /* ``Unless explicitly declared extern, a const object does not have
5206 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5209 && TREE_CODE (type
) != REFERENCE_TYPE
5210 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5211 && !DECL_INITIAL (decl
))
5213 tree field
= default_init_uninitialized_part (type
);
5217 if (CP_TYPE_CONST_P (type
))
5218 permerror (DECL_SOURCE_LOCATION (decl
),
5219 "uninitialized const %qD", decl
);
5222 error_at (DECL_SOURCE_LOCATION (decl
),
5223 "uninitialized variable %qD in %<constexpr%> function",
5225 cp_function_chain
->invalid_constexpr
= true;
5228 if (CLASS_TYPE_P (type
))
5230 tree defaulted_ctor
;
5232 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5233 "%q#T has no user-provided default constructor", type
);
5234 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5236 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5237 "constructor is not user-provided because it is "
5238 "explicitly defaulted in the class body");
5239 inform (0, "and the implicitly-defined constructor does not "
5240 "initialize %q+#D", field
);
5245 /* Structure holding the current initializer being processed by reshape_init.
5246 CUR is a pointer to the current element being processed, END is a pointer
5247 after the last element present in the initializer. */
5248 typedef struct reshape_iterator_t
5250 constructor_elt
*cur
;
5251 constructor_elt
*end
;
5254 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5256 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5257 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5258 initialized. If there are no more such fields, the return value
5262 next_initializable_field (tree field
)
5265 && (TREE_CODE (field
) != FIELD_DECL
5266 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5267 || DECL_ARTIFICIAL (field
)))
5268 field
= DECL_CHAIN (field
);
5273 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5274 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5275 INTEGER_CST representing the size of the array minus one (the maximum index),
5276 or NULL_TREE if the array was declared without specifying the size. D is
5277 the iterator within the constructor. */
5280 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5281 tsubst_flags_t complain
)
5284 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5285 unsigned HOST_WIDE_INT max_index_cst
= 0;
5286 unsigned HOST_WIDE_INT index
;
5288 /* The initializer for an array is always a CONSTRUCTOR. */
5289 new_init
= build_constructor (init_list_type_node
, NULL
);
5293 /* Minus 1 is used for zero sized arrays. */
5294 if (integer_all_onesp (max_index
))
5297 if (tree_fits_uhwi_p (max_index
))
5298 max_index_cst
= tree_to_uhwi (max_index
);
5299 /* sizetype is sign extended, not zero extended. */
5301 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5304 /* Loop until there are no more initializers. */
5306 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5310 constructor_elt
*old_cur
= d
->cur
;
5312 check_array_designated_initializer (d
->cur
, index
);
5313 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5315 if (elt_init
== error_mark_node
)
5316 return error_mark_node
;
5317 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5318 size_int (index
), elt_init
);
5319 if (!TREE_CONSTANT (elt_init
))
5320 TREE_CONSTANT (new_init
) = false;
5322 /* This can happen with an invalid initializer (c++/54501). */
5323 if (d
->cur
== old_cur
&& !sized_array_p
)
5330 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5331 Parameters are the same of reshape_init_r. */
5334 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5336 tree max_index
= NULL_TREE
;
5338 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5340 if (TYPE_DOMAIN (type
))
5341 max_index
= array_type_nelts (type
);
5343 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5346 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5347 Parameters are the same of reshape_init_r. */
5350 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5352 tree max_index
= NULL_TREE
;
5354 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5356 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5358 tree value
= d
->cur
->value
;
5359 if (!same_type_p (TREE_TYPE (value
), type
))
5361 if (complain
& tf_error
)
5362 error ("invalid type %qT as initializer for a vector of type %qT",
5363 TREE_TYPE (d
->cur
->value
), type
);
5364 value
= error_mark_node
;
5370 /* For a vector, we initialize it as an array of the appropriate size. */
5371 if (TREE_CODE (type
) == VECTOR_TYPE
)
5372 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5374 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5377 /* Subroutine of reshape_init_r, processes the initializers for classes
5378 or union. Parameters are the same of reshape_init_r. */
5381 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5382 tsubst_flags_t complain
)
5387 gcc_assert (CLASS_TYPE_P (type
));
5389 /* The initializer for a class is always a CONSTRUCTOR. */
5390 new_init
= build_constructor (init_list_type_node
, NULL
);
5391 field
= next_initializable_field (TYPE_FIELDS (type
));
5397 An initializer for an aggregate member that is an
5398 empty class shall have the form of an empty
5399 initializer-list {}. */
5400 if (!first_initializer_p
)
5402 if (complain
& tf_error
)
5403 error ("initializer for %qT must be brace-enclosed", type
);
5404 return error_mark_node
;
5409 /* Loop through the initializable fields, gathering initializers. */
5410 while (d
->cur
!= d
->end
)
5413 constructor_elt
*old_cur
= d
->cur
;
5415 /* Handle designated initializers, as an extension. */
5418 if (d
->cur
->index
== error_mark_node
)
5419 return error_mark_node
;
5421 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5422 /* We already reshaped this. */
5423 gcc_assert (d
->cur
->index
== field
);
5424 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5425 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5428 if (complain
& tf_error
)
5429 error ("%<[%E] =%> used in a GNU-style designated initializer"
5430 " for class %qT", d
->cur
->index
, type
);
5431 return error_mark_node
;
5434 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5436 if (complain
& tf_error
)
5437 error ("%qT has no non-static data member named %qD", type
,
5439 return error_mark_node
;
5443 /* If we processed all the member of the class, we are done. */
5447 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5448 /*first_initializer_p=*/false, complain
);
5449 if (field_init
== error_mark_node
)
5450 return error_mark_node
;
5452 if (d
->cur
== old_cur
&& d
->cur
->index
)
5454 /* This can happen with an invalid initializer for a flexible
5455 array member (c++/54441). */
5456 if (complain
& tf_error
)
5457 error ("invalid initializer for %q#D", field
);
5458 return error_mark_node
;
5461 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5465 When a union is initialized with a brace-enclosed
5466 initializer, the braces shall only contain an
5467 initializer for the first member of the union. */
5468 if (TREE_CODE (type
) == UNION_TYPE
)
5471 field
= next_initializable_field (DECL_CHAIN (field
));
5477 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5478 designators are not valid; either complain or return true to indicate
5479 that reshape_init_r should return error_mark_node. */
5482 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5486 if (complain
& tf_error
)
5487 error ("C99 designator %qE outside aggregate initializer",
5495 /* Subroutine of reshape_init, which processes a single initializer (part of
5496 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5497 iterator within the CONSTRUCTOR which points to the initializer to process.
5498 FIRST_INITIALIZER_P is true if this is the first initializer of the
5499 outermost CONSTRUCTOR node. */
5502 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5503 tsubst_flags_t complain
)
5505 tree init
= d
->cur
->value
;
5507 if (error_operand_p (init
))
5508 return error_mark_node
;
5510 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5511 && has_designator_problem (d
, complain
))
5512 return error_mark_node
;
5514 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5516 /* A complex type can be initialized from one or two initializers,
5517 but braces are not elided. */
5519 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5521 if (CONSTRUCTOR_NELTS (init
) > 2)
5523 if (complain
& tf_error
)
5524 error ("too many initializers for %qT", type
);
5526 return error_mark_node
;
5529 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5531 vec
<constructor_elt
, va_gc
> *v
= 0;
5532 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5533 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5534 if (has_designator_problem (d
, complain
))
5535 return error_mark_node
;
5537 init
= build_constructor (init_list_type_node
, v
);
5542 /* A non-aggregate type is always initialized with a single
5544 if (!CP_AGGREGATE_TYPE_P (type
))
5546 /* It is invalid to initialize a non-aggregate type with a
5547 brace-enclosed initializer before C++0x.
5548 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5549 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5550 a CONSTRUCTOR (with a record type). */
5551 if (TREE_CODE (init
) == CONSTRUCTOR
5552 /* Don't complain about a capture-init. */
5553 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5554 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5556 if (SCALAR_TYPE_P (type
))
5558 if (cxx_dialect
< cxx11
5559 /* Isn't value-initialization. */
5560 || CONSTRUCTOR_NELTS (init
) > 0)
5562 if (complain
& tf_error
)
5563 error ("braces around scalar initializer for type %qT",
5565 init
= error_mark_node
;
5569 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5576 /* "If T is a class type and the initializer list has a single element of
5577 type cv U, where U is T or a class derived from T, the object is
5578 initialized from that element." Even if T is an aggregate. */
5579 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5580 && first_initializer_p
5581 && d
->end
- d
->cur
== 1
5582 && reference_related_p (type
, TREE_TYPE (init
)))
5590 All implicit type conversions (clause _conv_) are considered when
5591 initializing the aggregate member with an initializer from an
5592 initializer-list. If the initializer can initialize a member,
5593 the member is initialized. Otherwise, if the member is itself a
5594 non-empty subaggregate, brace elision is assumed and the
5595 initializer is considered for the initialization of the first
5596 member of the subaggregate. */
5597 if (TREE_CODE (init
) != CONSTRUCTOR
5598 /* But don't try this for the first initializer, since that would be
5599 looking through the outermost braces; A a2 = { a1 }; is not a
5600 valid aggregate initialization. */
5601 && !first_initializer_p
5602 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5603 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5610 /* [dcl.init.string]
5612 A char array (whether plain char, signed char, or unsigned char)
5613 can be initialized by a string-literal (optionally enclosed in
5614 braces); a wchar_t array can be initialized by a wide
5615 string-literal (optionally enclosed in braces). */
5616 if (TREE_CODE (type
) == ARRAY_TYPE
5617 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5619 tree str_init
= init
;
5621 /* Strip one level of braces if and only if they enclose a single
5622 element (as allowed by [dcl.init.string]). */
5623 if (!first_initializer_p
5624 && TREE_CODE (str_init
) == CONSTRUCTOR
5625 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5627 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5630 /* If it's a string literal, then it's the initializer for the array
5631 as a whole. Otherwise, continue with normal initialization for
5632 array types (one value per array element). */
5633 if (TREE_CODE (str_init
) == STRING_CST
)
5635 if (has_designator_problem (d
, complain
))
5636 return error_mark_node
;
5642 /* The following cases are about aggregates. If we are not within a full
5643 initializer already, and there is not a CONSTRUCTOR, it means that there
5644 is a missing set of braces (that is, we are processing the case for
5645 which reshape_init exists). */
5646 if (!first_initializer_p
)
5648 if (TREE_CODE (init
) == CONSTRUCTOR
)
5650 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5651 /* There is no need to reshape pointer-to-member function
5652 initializers, as they are always constructed correctly
5653 by the front end. */
5655 else if (COMPOUND_LITERAL_P (init
))
5656 /* For a nested compound literal, there is no need to reshape since
5657 brace elision is not allowed. Even if we decided to allow it,
5658 we should add a call to reshape_init in finish_compound_literal,
5659 before calling digest_init, so changing this code would still
5660 not be necessary. */
5661 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5665 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5666 return reshape_init (type
, init
, complain
);
5670 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5674 /* Dispatch to specialized routines. */
5675 if (CLASS_TYPE_P (type
))
5676 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5677 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5678 return reshape_init_array (type
, d
, complain
);
5679 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5680 return reshape_init_vector (type
, d
, complain
);
5685 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5686 brace-enclosed aggregate initializer.
5688 INIT is the CONSTRUCTOR containing the list of initializers describing
5689 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5690 It may not presently match the shape of the TYPE; for example:
5692 struct S { int a; int b; };
5693 struct S a[] = { 1, 2, 3, 4 };
5695 Here INIT will hold a vector of four elements, rather than a
5696 vector of two elements, each itself a vector of two elements. This
5697 routine transforms INIT from the former form into the latter. The
5698 revised CONSTRUCTOR node is returned. */
5701 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5703 vec
<constructor_elt
, va_gc
> *v
;
5707 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5709 v
= CONSTRUCTOR_ELTS (init
);
5711 /* An empty constructor does not need reshaping, and it is always a valid
5713 if (vec_safe_is_empty (v
))
5716 /* Recurse on this CONSTRUCTOR. */
5718 d
.end
= d
.cur
+ v
->length ();
5720 new_init
= reshape_init_r (type
, &d
, true, complain
);
5721 if (new_init
== error_mark_node
)
5722 return error_mark_node
;
5724 /* Make sure all the element of the constructor were used. Otherwise,
5725 issue an error about exceeding initializers. */
5728 if (complain
& tf_error
)
5729 error ("too many initializers for %qT", type
);
5731 return error_mark_node
;
5737 /* Verify array initializer. Returns true if errors have been reported. */
5740 check_array_initializer (tree decl
, tree type
, tree init
)
5742 tree element_type
= TREE_TYPE (type
);
5744 /* The array type itself need not be complete, because the
5745 initializer may tell us how many elements are in the array.
5746 But, the elements of the array must be complete. */
5747 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5750 error ("elements of array %q#D have incomplete type", decl
);
5752 error ("elements of array %q#T have incomplete type", type
);
5755 /* A compound literal can't have variable size. */
5757 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5758 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5760 error ("variable-sized compound literal");
5766 /* Subroutine of check_initializer; args are passed down from that function.
5767 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5770 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5773 gcc_assert (stmts_are_full_exprs_p ());
5774 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5777 /* Verify INIT (the initializer for DECL), and record the
5778 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5779 grok_reference_init.
5781 If the return value is non-NULL, it is an expression that must be
5782 evaluated dynamically to initialize DECL. */
5785 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5787 tree type
= TREE_TYPE (decl
);
5788 tree init_code
= NULL
;
5791 /* Things that are going to be initialized need to have complete
5793 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5795 if (DECL_HAS_VALUE_EXPR_P (decl
))
5797 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5798 it doesn't have storage to be initialized. */
5799 gcc_assert (init
== NULL_TREE
);
5803 if (type
== error_mark_node
)
5804 /* We will have already complained. */
5807 if (TREE_CODE (type
) == ARRAY_TYPE
)
5809 if (check_array_initializer (decl
, type
, init
))
5812 else if (!COMPLETE_TYPE_P (type
))
5814 error ("%q#D has incomplete type", decl
);
5815 TREE_TYPE (decl
) = error_mark_node
;
5819 /* There is no way to make a variable-sized class type in GNU C++. */
5820 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5822 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5824 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5825 if (SCALAR_TYPE_P (type
))
5829 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5830 init
= build_zero_init (type
, NULL_TREE
, false);
5832 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5834 error ("scalar object %qD requires one element in initializer",
5836 TREE_TYPE (decl
) = error_mark_node
;
5842 if (TREE_CODE (decl
) == CONST_DECL
)
5844 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5846 DECL_INITIAL (decl
) = init
;
5848 gcc_assert (init
!= NULL_TREE
);
5851 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5853 else if (init
|| type_build_ctor_call (type
)
5854 || TREE_CODE (type
) == REFERENCE_TYPE
)
5856 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5858 init
= grok_reference_init (decl
, type
, init
, flags
);
5859 flags
|= LOOKUP_ALREADY_DIGESTED
;
5862 check_for_uninitialized_const_var (decl
);
5863 /* Do not reshape constructors of vectors (they don't need to be
5865 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5867 if (is_std_init_list (type
))
5869 init
= perform_implicit_conversion (type
, init
,
5870 tf_warning_or_error
);
5871 flags
|= LOOKUP_ALREADY_DIGESTED
;
5873 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5875 /* Don't reshape if the class has constructors. */
5876 if (cxx_dialect
== cxx98
)
5877 error ("in C++98 %qD must be initialized by constructor, "
5881 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5883 error ("opaque vector types cannot be initialized");
5884 init
= error_mark_node
;
5888 init
= reshape_init (type
, init
, tf_warning_or_error
);
5889 flags
|= LOOKUP_NO_NARROWING
;
5892 else if (TREE_CODE (init
) == TREE_LIST
5893 && TREE_TYPE (init
) != unknown_type_node
5894 && !MAYBE_CLASS_TYPE_P (type
))
5896 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5898 /* We get here with code like `int a (2);' */
5899 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5900 tf_warning_or_error
);
5903 /* If DECL has an array type without a specific bound, deduce the
5904 array size from the initializer. */
5905 maybe_deduce_size_from_array_init (decl
, init
);
5906 type
= TREE_TYPE (decl
);
5907 if (type
== error_mark_node
)
5910 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5911 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5912 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5913 && CP_AGGREGATE_TYPE_P (type
)
5914 && (CLASS_TYPE_P (type
)
5915 || !TYPE_NEEDS_CONSTRUCTING (type
)
5916 || type_has_extended_temps (type
))))
5918 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5920 /* A constructor call is a non-trivial initializer even if
5921 it isn't explicitly written. */
5922 if (TREE_SIDE_EFFECTS (init_code
))
5923 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5925 /* If this is a constexpr initializer, expand_default_init will
5926 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5927 case, pull the initializer back out and pass it down into
5928 store_init_value. */
5929 while (TREE_CODE (init_code
) == EXPR_STMT
5930 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5931 init_code
= TREE_OPERAND (init_code
, 0);
5932 if (TREE_CODE (init_code
) == INIT_EXPR
)
5934 init
= TREE_OPERAND (init_code
, 1);
5935 init_code
= NULL_TREE
;
5936 /* Don't call digest_init; it's unnecessary and will complain
5937 about aggregate initialization of non-aggregate classes. */
5938 flags
|= LOOKUP_ALREADY_DIGESTED
;
5940 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5942 /* Declared constexpr, but no suitable initializer; massage
5943 init appropriately so we can pass it into store_init_value
5945 if (CLASS_TYPE_P (type
)
5946 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5948 init
= build_functional_cast (type
, init
, tf_none
);
5949 if (TREE_CODE (init
) == TARGET_EXPR
)
5950 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5952 init_code
= NULL_TREE
;
5958 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5960 /* In aggregate initialization of a variable, each element
5961 initialization is a full-expression because there is no
5962 enclosing expression. */
5963 gcc_assert (stmts_are_full_exprs_p ());
5965 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5967 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5968 && DECL_INITIAL (decl
)
5969 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5970 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5971 warning (0, "array %qD initialized by parenthesized string literal %qE",
5972 decl
, DECL_INITIAL (decl
));
5978 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5979 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5980 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5981 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5984 check_for_uninitialized_const_var (decl
);
5987 if (init
&& init
!= error_mark_node
)
5988 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5992 /* We might have set these in cp_finish_decl. */
5993 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
5994 TREE_CONSTANT (decl
) = false;
5997 if (init_code
&& DECL_IN_AGGR_P (decl
))
5999 static int explained
= 0;
6001 if (cxx_dialect
< cxx11
)
6002 error ("initializer invalid for static member with constructor");
6004 error ("non-constant in-class initialization invalid for static "
6005 "member %qD", decl
);
6008 inform (input_location
,
6009 "(an out of class initialization is required)");
6018 /* If DECL is not a local variable, give it RTL. */
6021 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6023 int toplev
= toplevel_bindings_p ();
6025 const char *filename
;
6027 /* Set the DECL_ASSEMBLER_NAME for the object. */
6030 /* The `register' keyword, when used together with an
6031 asm-specification, indicates that the variable should be
6032 placed in a particular register. */
6033 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6035 set_user_assembler_name (decl
, asmspec
);
6036 DECL_HARD_REGISTER (decl
) = 1;
6040 if (TREE_CODE (decl
) == FUNCTION_DECL
6041 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6042 set_builtin_user_assembler_name (decl
, asmspec
);
6043 set_user_assembler_name (decl
, asmspec
);
6047 /* Handle non-variables up front. */
6050 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6054 /* If we see a class member here, it should be a static data
6056 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6058 gcc_assert (TREE_STATIC (decl
));
6059 /* An in-class declaration of a static data member should be
6060 external; it is only a declaration, and not a definition. */
6061 if (init
== NULL_TREE
)
6062 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6065 /* We don't create any RTL for local variables. */
6066 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6069 /* We defer emission of local statics until the corresponding
6070 DECL_EXPR is expanded. */
6071 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6073 /* We try to defer namespace-scope static constants so that they are
6074 not emitted into the object file unnecessarily. */
6075 filename
= LOCATION_FILE (input_location
);
6076 if (!DECL_VIRTUAL_P (decl
)
6077 && TREE_READONLY (decl
)
6078 && DECL_INITIAL (decl
) != NULL_TREE
6079 && DECL_INITIAL (decl
) != error_mark_node
6081 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
6083 && !TREE_PUBLIC (decl
))
6085 /* Fool with the linkage of static consts according to #pragma
6087 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
6088 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
6090 TREE_PUBLIC (decl
) = 1;
6091 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
6096 /* Likewise for template instantiations. */
6097 else if (DECL_LANG_SPECIFIC (decl
)
6098 && DECL_IMPLICIT_INSTANTIATION (decl
))
6101 /* If we're not deferring, go ahead and assemble the variable. */
6103 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6106 /* walk_tree helper for wrap_temporary_cleanups, below. */
6109 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6111 /* Stop at types or full-expression boundaries. */
6112 if (TYPE_P (*stmt_p
)
6113 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6119 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6121 tree guard
= (tree
)data
;
6122 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6124 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6125 /* Tell honor_protect_cleanup_actions to handle this as a separate
6127 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6129 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6135 /* We're initializing a local variable which has a cleanup GUARD. If there
6136 are any temporaries used in the initializer INIT of this variable, we
6137 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6138 variable will be cleaned up properly if one of them throws.
6140 Unfortunately, there's no way to express this properly in terms of
6141 nesting, as the regions for the temporaries overlap the region for the
6142 variable itself; if there are two temporaries, the variable needs to be
6143 the first thing destroyed if either of them throws. However, we only
6144 want to run the variable's cleanup if it actually got constructed. So
6145 we need to guard the temporary cleanups with the variable's cleanup if
6146 they are run on the normal path, but not if they are run on the
6147 exceptional path. We implement this by telling
6148 honor_protect_cleanup_actions to strip the variable cleanup from the
6149 exceptional path. */
6152 wrap_temporary_cleanups (tree init
, tree guard
)
6154 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6157 /* Generate code to initialize DECL (a local variable). */
6160 initialize_local_var (tree decl
, tree init
)
6162 tree type
= TREE_TYPE (decl
);
6166 gcc_assert (VAR_P (decl
)
6167 || TREE_CODE (decl
) == RESULT_DECL
);
6168 gcc_assert (!TREE_STATIC (decl
));
6170 if (DECL_SIZE (decl
) == NULL_TREE
)
6172 /* If we used it already as memory, it must stay in memory. */
6173 DECL_INITIAL (decl
) = NULL_TREE
;
6174 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6178 if (type
== error_mark_node
)
6181 /* Compute and store the initial value. */
6182 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6183 if (TREE_USED (type
))
6184 DECL_READ_P (decl
) = 1;
6186 /* Generate a cleanup, if necessary. */
6187 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6189 /* Perform the initialization. */
6192 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6193 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6194 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6196 /* Stick simple initializers in DECL_INITIAL so that
6197 -Wno-init-self works (c++/34772). */
6198 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6199 DECL_INITIAL (decl
) = rinit
;
6201 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6205 warning_at (DECL_SOURCE_LOCATION (decl
),
6207 "reference %qD is initialized with itself", decl
);
6212 int saved_stmts_are_full_exprs_p
;
6214 /* If we're only initializing a single object, guard the
6215 destructors of any temporaries used in its initializer with
6216 its destructor. This isn't right for arrays because each
6217 element initialization is a full-expression. */
6218 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6219 wrap_temporary_cleanups (init
, cleanup
);
6221 gcc_assert (building_stmt_list_p ());
6222 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6223 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6224 finish_expr_stmt (init
);
6225 current_stmt_tree ()->stmts_are_full_exprs_p
=
6226 saved_stmts_are_full_exprs_p
;
6230 /* Set this to 0 so we can tell whether an aggregate which was
6231 initialized was ever used. Don't do this if it has a
6232 destructor, so we don't complain about the 'resource
6233 allocation is initialization' idiom. Now set
6234 attribute((unused)) on types so decls of that type will be
6235 marked used. (see TREE_USED, above.) */
6236 if (TYPE_NEEDS_CONSTRUCTING (type
)
6238 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6239 && DECL_NAME (decl
))
6240 TREE_USED (decl
) = 0;
6241 else if (already_used
)
6242 TREE_USED (decl
) = 1;
6245 finish_decl_cleanup (decl
, cleanup
);
6248 /* DECL is a VAR_DECL for a compiler-generated variable with static
6249 storage duration (like a virtual table) whose initializer is a
6250 compile-time constant. Initialize the variable and provide it to the
6254 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6257 gcc_assert (DECL_ARTIFICIAL (decl
));
6258 init
= build_constructor (TREE_TYPE (decl
), v
);
6259 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6260 DECL_INITIAL (decl
) = init
;
6261 DECL_INITIALIZED_P (decl
) = 1;
6262 determine_visibility (decl
);
6263 layout_var_decl (decl
);
6264 maybe_commonize_var (decl
);
6265 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6268 /* INIT is the initializer for a variable, as represented by the
6269 parser. Returns true iff INIT is type-dependent. */
6272 type_dependent_init_p (tree init
)
6274 if (TREE_CODE (init
) == TREE_LIST
)
6275 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6276 return any_type_dependent_elements_p (init
);
6277 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6278 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6280 vec
<constructor_elt
, va_gc
> *elts
;
6284 elts
= CONSTRUCTOR_ELTS (init
);
6285 nelts
= vec_safe_length (elts
);
6286 for (i
= 0; i
< nelts
; ++i
)
6287 if (type_dependent_init_p ((*elts
)[i
].value
))
6291 /* It must be a simple expression, e.g., int i = 3; */
6292 return type_dependent_expression_p (init
);
6297 /* INIT is the initializer for a variable, as represented by the
6298 parser. Returns true iff INIT is value-dependent. */
6301 value_dependent_init_p (tree init
)
6303 if (TREE_CODE (init
) == TREE_LIST
)
6304 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6305 return any_value_dependent_elements_p (init
);
6306 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6307 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6309 vec
<constructor_elt
, va_gc
> *elts
;
6313 elts
= CONSTRUCTOR_ELTS (init
);
6314 nelts
= vec_safe_length (elts
);
6315 for (i
= 0; i
< nelts
; ++i
)
6316 if (value_dependent_init_p ((*elts
)[i
].value
))
6320 /* It must be a simple expression, e.g., int i = 3; */
6321 return value_dependent_expression_p (init
);
6326 /* Finish processing of a declaration;
6327 install its line number and initial value.
6328 If the length of an array type is not known before,
6329 it must be determined now, from the initial value, or it is an error.
6331 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6332 true, then INIT is an integral constant expression.
6334 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6335 if the (init) syntax was used. */
6338 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6339 tree asmspec_tree
, int flags
)
6342 vec
<tree
, va_gc
> *cleanups
= NULL
;
6343 const char *asmspec
= NULL
;
6344 int was_readonly
= 0;
6345 bool var_definition_p
= false;
6348 if (decl
== error_mark_node
)
6353 error ("assignment (not initialization) in declaration");
6357 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6358 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6359 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6361 type
= TREE_TYPE (decl
);
6362 if (type
== error_mark_node
)
6365 /* If a name was specified, get the string. */
6366 if (at_namespace_scope_p ())
6367 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6368 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6369 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6371 if (current_class_type
6372 && CP_DECL_CONTEXT (decl
) == current_class_type
6373 && TYPE_BEING_DEFINED (current_class_type
)
6374 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6375 && (DECL_INITIAL (decl
) || init
))
6376 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6378 if (TREE_CODE (decl
) != FUNCTION_DECL
6379 && (auto_node
= type_uses_auto (type
)))
6382 if (init
== NULL_TREE
)
6384 if (DECL_LANG_SPECIFIC (decl
)
6385 && DECL_TEMPLATE_INSTANTIATION (decl
)
6386 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6388 /* init is null because we're deferring instantiating the
6389 initializer until we need it. Well, we need it now. */
6390 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6394 error ("declaration of %q#D has no initializer", decl
);
6395 TREE_TYPE (decl
) = error_mark_node
;
6399 if (TREE_CODE (d_init
) == TREE_LIST
)
6400 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6401 tf_warning_or_error
);
6402 d_init
= resolve_nondeduced_context (d_init
);
6403 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6405 if (type
== error_mark_node
)
6407 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6410 if (!ensure_literal_type_for_constexpr_object (decl
))
6411 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6414 && DECL_CLASS_SCOPE_P (decl
)
6415 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6416 check_static_variable_definition (decl
, type
);
6418 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6421 if (init
== ridpointers
[(int)RID_DELETE
])
6423 /* FIXME check this is 1st decl. */
6424 DECL_DELETED_FN (decl
) = 1;
6425 DECL_DECLARED_INLINE_P (decl
) = 1;
6426 DECL_INITIAL (decl
) = error_mark_node
;
6427 FOR_EACH_CLONE (clone
, decl
)
6429 DECL_DELETED_FN (clone
) = 1;
6430 DECL_DECLARED_INLINE_P (clone
) = 1;
6431 DECL_INITIAL (clone
) = error_mark_node
;
6435 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6437 if (defaultable_fn_check (decl
))
6438 DECL_DEFAULTED_FN (decl
) = 1;
6440 DECL_INITIAL (decl
) = NULL_TREE
;
6444 if (init
&& VAR_P (decl
))
6446 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6447 /* If DECL is a reference, then we want to know whether init is a
6448 reference constant; init_const_expr_p as passed tells us whether
6449 it's an rvalue constant. */
6450 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6451 init_const_expr_p
= potential_constant_expression (init
);
6452 if (init_const_expr_p
)
6454 /* Set these flags now for templates. We'll update the flags in
6455 store_init_value for instantiations. */
6456 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6457 if (decl_maybe_constant_var_p (decl
))
6458 TREE_CONSTANT (decl
) = 1;
6462 if (processing_template_decl
)
6464 bool type_dependent_p
;
6466 /* Add this declaration to the statement-tree. */
6467 if (at_function_scope_p ())
6468 add_decl_expr (decl
);
6470 type_dependent_p
= dependent_type_p (type
);
6472 if (check_for_bare_parameter_packs (init
))
6475 DECL_INITIAL (decl
) = NULL_TREE
;
6478 /* Generally, initializers in templates are expanded when the
6479 template is instantiated. But, if DECL is a variable constant
6480 then it can be used in future constant expressions, so its value
6481 must be available. */
6483 if (!VAR_P (decl
) || dependent_type_p (type
))
6484 /* We can't do anything if the decl has dependent type. */;
6486 && init_const_expr_p
6487 && !type_dependent_p
6488 && TREE_CODE (type
) != REFERENCE_TYPE
6489 && decl_maybe_constant_var_p (decl
)
6490 && !type_dependent_init_p (init
)
6491 && !value_dependent_init_p (init
))
6493 /* This variable seems to be a non-dependent constant, so process
6494 its initializer. If check_initializer returns non-null the
6495 initialization wasn't constant after all. */
6497 cleanups
= make_tree_vector ();
6498 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6499 if (init_code
== NULL_TREE
)
6501 release_tree_vector (cleanups
);
6503 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6505 /* Deduce array size even if the initializer is dependent. */
6506 maybe_deduce_size_from_array_init (decl
, init
);
6507 /* And complain about multiple initializers. */
6508 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6509 && !MAYBE_CLASS_TYPE_P (type
))
6510 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6511 tf_warning_or_error
);
6515 DECL_INITIAL (decl
) = init
;
6519 /* Just store non-static data member initializers for later. */
6520 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6521 DECL_INITIAL (decl
) = init
;
6523 /* Take care of TYPE_DECLs up front. */
6524 if (TREE_CODE (decl
) == TYPE_DECL
)
6526 if (type
!= error_mark_node
6527 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6529 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6530 warning (0, "shadowing previous type declaration of %q#D", decl
);
6531 set_identifier_type_value (DECL_NAME (decl
), decl
);
6534 /* If we have installed this as the canonical typedef for this
6535 type, and that type has not been defined yet, delay emitting
6536 the debug information for it, as we will emit it later. */
6537 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6538 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6539 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6541 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6546 /* A reference will be modified here, as it is initialized. */
6547 if (! DECL_EXTERNAL (decl
)
6548 && TREE_READONLY (decl
)
6549 && TREE_CODE (type
) == REFERENCE_TYPE
)
6552 TREE_READONLY (decl
) = 0;
6557 /* If this is a local variable that will need a mangled name,
6558 register it now. We must do this before processing the
6559 initializer for the variable, since the initialization might
6560 require a guard variable, and since the mangled name of the
6561 guard variable will depend on the mangled name of this
6563 if (DECL_FUNCTION_SCOPE_P (decl
)
6564 && TREE_STATIC (decl
)
6565 && !DECL_ARTIFICIAL (decl
))
6567 push_local_name (decl
);
6568 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6569 || DECL_DESTRUCTOR_P (current_function_decl
))
6570 /* Normally local_decls is populated during GIMPLE lowering,
6571 but [cd]tors are never actually compiled directly. We need
6572 to put statics on the list so we can deal with the label
6573 address extension. FIXME. */
6574 add_local_decl (cfun
, decl
);
6577 /* Convert the initializer to the type of DECL, if we have not
6578 already initialized DECL. */
6579 if (!DECL_INITIALIZED_P (decl
)
6580 /* If !DECL_EXTERNAL then DECL is being defined. In the
6581 case of a static data member initialized inside the
6582 class-specifier, there can be an initializer even if DECL
6583 is *not* defined. */
6584 && (!DECL_EXTERNAL (decl
) || init
))
6586 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6589 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6590 /* Allow libjava/prims.cc define primitive classes. */
6591 if (init
!= NULL_TREE
6592 || jclass
== NULL_TREE
6593 || TREE_CODE (jclass
) != TYPE_DECL
6594 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6595 || !same_type_ignoring_top_level_qualifiers_p
6596 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6597 error ("Java object %qD not allocated with %<new%>", decl
);
6600 cleanups
= make_tree_vector ();
6601 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6607 The memory occupied by any object of static storage
6608 duration is zero-initialized at program startup before
6609 any other initialization takes place.
6611 We cannot create an appropriate initializer until after
6612 the type of DECL is finalized. If DECL_INITIAL is set,
6613 then the DECL is statically initialized, and any
6614 necessary zero-initialization has already been performed. */
6615 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6616 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6617 /*nelts=*/NULL_TREE
,
6618 /*static_storage_p=*/true);
6619 /* Remember that the initialization for this variable has
6621 DECL_INITIALIZED_P (decl
) = 1;
6622 /* This declaration is the definition of this variable,
6623 unless we are initializing a static data member within
6624 the class specifier. */
6625 if (!DECL_EXTERNAL (decl
))
6626 var_definition_p
= true;
6628 /* If the variable has an array type, lay out the type, even if
6629 there is no initializer. It is valid to index through the
6630 array, and we must get TYPE_ALIGN set correctly on the array
6632 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6635 if (TREE_STATIC (decl
)
6636 && !at_function_scope_p ()
6637 && current_function_decl
== NULL
)
6638 /* So decl is a global variable or a static member of a
6639 non local class. Record the types it uses
6640 so that we can decide later to emit debug info for them. */
6641 record_types_used_by_current_var_decl (decl
);
6643 else if (TREE_CODE (decl
) == FIELD_DECL
6644 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6645 error ("non-static data member %qD has Java class type", decl
);
6647 /* Add this declaration to the statement-tree. This needs to happen
6648 after the call to check_initializer so that the DECL_EXPR for a
6649 reference temp is added before the DECL_EXPR for the reference itself. */
6650 if (DECL_FUNCTION_SCOPE_P (decl
))
6652 /* If we're building a variable sized type, and we might be
6653 reachable other than via the top of the current binding
6654 level, then create a new BIND_EXPR so that we deallocate
6655 the object at the right time. */
6658 && !TREE_CONSTANT (DECL_SIZE (decl
))
6659 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6662 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6663 TREE_SIDE_EFFECTS (bind
) = 1;
6665 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6667 add_decl_expr (decl
);
6670 /* Let the middle end know about variables and functions -- but not
6671 static data members in uninstantiated class templates. */
6672 if (VAR_OR_FUNCTION_DECL_P (decl
))
6676 layout_var_decl (decl
);
6677 maybe_commonize_var (decl
);
6680 /* This needs to happen after the linkage is set. */
6681 determine_visibility (decl
);
6683 if (var_definition_p
&& TREE_STATIC (decl
))
6685 /* If a TREE_READONLY variable needs initialization
6686 at runtime, it is no longer readonly and we need to
6687 avoid MEM_READONLY_P being set on RTL created for it. */
6690 if (TREE_READONLY (decl
))
6691 TREE_READONLY (decl
) = 0;
6694 else if (was_readonly
)
6695 TREE_READONLY (decl
) = 1;
6697 /* Likewise if it needs destruction. */
6698 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6699 TREE_READONLY (decl
) = 0;
6702 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6704 /* Check for abstractness of the type. Notice that there is no
6705 need to strip array types here since the check for those types
6706 is already done within create_array_type_for_decl. */
6707 abstract_virtuals_error (decl
, type
);
6709 if (TREE_TYPE (decl
) == error_mark_node
)
6710 /* No initialization required. */
6712 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6716 if (init
== ridpointers
[(int)RID_DEFAULT
])
6718 /* An out-of-class default definition is defined at
6719 the point where it is explicitly defaulted. */
6720 if (DECL_DELETED_FN (decl
))
6721 maybe_explain_implicit_delete (decl
);
6722 else if (DECL_INITIAL (decl
) == error_mark_node
)
6723 synthesize_method (decl
);
6726 error ("function %q#D is initialized like a variable", decl
);
6728 /* else no initialization required. */
6730 else if (DECL_EXTERNAL (decl
)
6731 && ! (DECL_LANG_SPECIFIC (decl
)
6732 && DECL_NOT_REALLY_EXTERN (decl
)))
6735 DECL_INITIAL (decl
) = init
;
6737 /* A variable definition. */
6738 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6739 /* Initialize the local variable. */
6740 initialize_local_var (decl
, init
);
6742 /* If a variable is defined, and then a subsequent
6743 definition with external linkage is encountered, we will
6744 get here twice for the same variable. We want to avoid
6745 calling expand_static_init more than once. For variables
6746 that are not static data members, we can call
6747 expand_static_init only when we actually process the
6748 initializer. It is not legal to redeclare a static data
6749 member, so this issue does not arise in that case. */
6750 else if (var_definition_p
&& TREE_STATIC (decl
))
6751 expand_static_init (decl
, init
);
6754 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6755 reference, insert it in the statement-tree now. */
6759 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6760 push_cleanup (decl
, t
, false);
6761 release_tree_vector (cleanups
);
6765 TREE_READONLY (decl
) = 1;
6767 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6770 /* Returns a declaration for a VAR_DECL as if:
6772 extern "C" TYPE NAME;
6774 had been seen. Used to create compiler-generated global
6778 declare_global_var (tree name
, tree type
)
6782 push_to_top_level ();
6783 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6784 TREE_PUBLIC (decl
) = 1;
6785 DECL_EXTERNAL (decl
) = 1;
6786 DECL_ARTIFICIAL (decl
) = 1;
6787 /* If the user has explicitly declared this variable (perhaps
6788 because the code we are compiling is part of a low-level runtime
6789 library), then it is possible that our declaration will be merged
6790 with theirs by pushdecl. */
6791 decl
= pushdecl (decl
);
6792 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6793 pop_from_top_level ();
6798 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6799 if "__cxa_atexit" is not being used) corresponding to the function
6800 to be called when the program exits. */
6803 get_atexit_fn_ptr_type (void)
6807 if (!atexit_fn_ptr_type_node
)
6810 if (flag_use_cxa_atexit
6811 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6812 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6813 arg_type
= ptr_type_node
;
6815 /* The parameter to "atexit" is "void (*)(void)". */
6816 arg_type
= NULL_TREE
;
6818 fn_type
= build_function_type_list (void_type_node
,
6819 arg_type
, NULL_TREE
);
6820 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6823 return atexit_fn_ptr_type_node
;
6826 /* Returns a pointer to the `atexit' function. Note that if
6827 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6828 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6831 get_atexit_node (void)
6837 bool use_aeabi_atexit
;
6842 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6844 /* The declaration for `__cxa_atexit' is:
6846 int __cxa_atexit (void (*)(void *), void *, void *)
6848 We build up the argument types and then the function type
6850 tree argtype0
, argtype1
, argtype2
;
6852 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6853 /* First, build the pointer-to-function type for the first
6855 fn_ptr_type
= get_atexit_fn_ptr_type ();
6856 /* Then, build the rest of the argument types. */
6857 argtype2
= ptr_type_node
;
6858 if (use_aeabi_atexit
)
6860 argtype1
= fn_ptr_type
;
6861 argtype0
= ptr_type_node
;
6865 argtype1
= ptr_type_node
;
6866 argtype0
= fn_ptr_type
;
6868 /* And the final __cxa_atexit type. */
6869 fn_type
= build_function_type_list (integer_type_node
,
6870 argtype0
, argtype1
, argtype2
,
6872 if (use_aeabi_atexit
)
6873 name
= "__aeabi_atexit";
6875 name
= "__cxa_atexit";
6879 /* The declaration for `atexit' is:
6881 int atexit (void (*)());
6883 We build up the argument types and then the function type
6885 fn_ptr_type
= get_atexit_fn_ptr_type ();
6886 /* Build the final atexit type. */
6887 fn_type
= build_function_type_list (integer_type_node
,
6888 fn_ptr_type
, NULL_TREE
);
6892 /* Now, build the function declaration. */
6893 push_lang_context (lang_name_c
);
6894 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6895 mark_used (atexit_fndecl
);
6896 pop_lang_context ();
6897 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6902 /* Like get_atexit_node, but for thread-local cleanups. */
6905 get_thread_atexit_node (void)
6907 /* The declaration for `__cxa_thread_atexit' is:
6909 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6910 tree fn_type
= build_function_type_list (integer_type_node
,
6911 get_atexit_fn_ptr_type (),
6912 ptr_type_node
, ptr_type_node
,
6915 /* Now, build the function declaration. */
6916 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6917 ECF_LEAF
| ECF_NOTHROW
);
6918 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6921 /* Returns the __dso_handle VAR_DECL. */
6924 get_dso_handle_node (void)
6926 if (dso_handle_node
)
6927 return dso_handle_node
;
6929 /* Declare the variable. */
6930 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6933 #ifdef HAVE_GAS_HIDDEN
6934 if (dso_handle_node
!= error_mark_node
)
6936 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6937 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6941 return dso_handle_node
;
6944 /* Begin a new function with internal linkage whose job will be simply
6945 to destroy some particular variable. */
6947 static GTY(()) int start_cleanup_cnt
;
6950 start_cleanup_fn (void)
6955 bool use_cxa_atexit
= flag_use_cxa_atexit
6956 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6958 push_to_top_level ();
6960 /* No need to mangle this. */
6961 push_lang_context (lang_name_c
);
6963 /* Build the name of the function. */
6964 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6965 /* Build the function declaration. */
6966 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6967 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6968 /* It's a function with internal linkage, generated by the
6970 TREE_PUBLIC (fndecl
) = 0;
6971 DECL_ARTIFICIAL (fndecl
) = 1;
6972 /* Make the function `inline' so that it is only emitted if it is
6973 actually needed. It is unlikely that it will be inlined, since
6974 it is only called via a function pointer, but we avoid unnecessary
6975 emissions this way. */
6976 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6977 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6978 /* Build the parameter. */
6983 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6984 DECL_CONTEXT (parmdecl
) = fndecl
;
6985 TREE_USED (parmdecl
) = 1;
6986 DECL_READ_P (parmdecl
) = 1;
6987 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6991 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6993 pop_lang_context ();
6995 return current_function_decl
;
6998 /* Finish the cleanup function begun by start_cleanup_fn. */
7001 end_cleanup_fn (void)
7003 expand_or_defer_fn (finish_function (0));
7005 pop_from_top_level ();
7008 /* Generate code to handle the destruction of DECL, an object with
7009 static storage duration. */
7012 register_dtor_fn (tree decl
)
7019 bool ob_parm
, dso_parm
, use_dtor
;
7020 tree arg0
, arg1
, arg2
;
7023 type
= TREE_TYPE (decl
);
7024 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7027 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7028 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7029 destructor to "__cxa_atexit"; we don't have to build a temporary
7030 function to do the cleanup. */
7031 dso_parm
= (flag_use_cxa_atexit
7032 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7033 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7034 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7039 /* Find the destructor. */
7040 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7041 gcc_assert (idx
>= 0);
7042 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7043 /* Make sure it is accessible. */
7044 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7045 tf_warning_or_error
);
7049 /* Call build_cleanup before we enter the anonymous function so
7050 that any access checks will be done relative to the current
7051 scope, rather than the scope of the anonymous function. */
7052 build_cleanup (decl
);
7054 /* Now start the function. */
7055 cleanup
= start_cleanup_fn ();
7057 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7058 to the original function, rather than the anonymous one. That
7059 will make the back end think that nested functions are in use,
7060 which causes confusion. */
7061 push_deferring_access_checks (dk_no_check
);
7062 fcall
= build_cleanup (decl
);
7063 pop_deferring_access_checks ();
7065 /* Create the body of the anonymous function. */
7066 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7067 finish_expr_stmt (fcall
);
7068 finish_compound_stmt (compound_stmt
);
7072 /* Call atexit with the cleanup function. */
7073 mark_used (cleanup
);
7074 cleanup
= build_address (cleanup
);
7076 if (DECL_THREAD_LOCAL_P (decl
))
7077 atex_node
= get_thread_atexit_node ();
7079 atex_node
= get_atexit_node ();
7083 /* We must convert CLEANUP to the type that "__cxa_atexit"
7085 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7086 /* "__cxa_atexit" will pass the address of DECL to the
7087 cleanup function. */
7089 addr
= build_address (decl
);
7090 /* The declared type of the parameter to "__cxa_atexit" is
7091 "void *". For plain "T*", we could just let the
7092 machinery in cp_build_function_call convert it -- but if the
7093 type is "cv-qualified T *", then we need to convert it
7094 before passing it in, to avoid spurious errors. */
7095 addr
= build_nop (ptr_type_node
, addr
);
7098 /* Since the cleanup functions we build ignore the address
7099 they're given, there's no reason to pass the actual address
7100 in, and, in general, it's cheaper to pass NULL than any
7102 addr
= null_pointer_node
;
7105 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7106 tf_warning_or_error
);
7108 /* Just pass NULL to the dso handle parm if we don't actually
7109 have a DSO handle on this target. */
7110 arg2
= null_pointer_node
;
7116 if (!DECL_THREAD_LOCAL_P (decl
)
7117 && targetm
.cxx
.use_aeabi_atexit ())
7133 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7134 arg0
, arg1
, arg2
, NULL_TREE
);
7137 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7138 is its initializer. Generate code to handle the construction
7139 and destruction of DECL. */
7142 expand_static_init (tree decl
, tree init
)
7144 gcc_assert (VAR_P (decl
));
7145 gcc_assert (TREE_STATIC (decl
));
7147 /* Some variables require no dynamic initialization. */
7149 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7151 /* Make sure the destructor is callable. */
7152 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7156 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7157 && !DECL_FUNCTION_SCOPE_P (decl
))
7160 error ("non-local variable %qD declared %<__thread%> "
7161 "needs dynamic initialization", decl
);
7163 error ("non-local variable %qD declared %<__thread%> "
7164 "has a non-trivial destructor", decl
);
7165 static bool informed
;
7168 inform (DECL_SOURCE_LOCATION (decl
),
7169 "C++11 %<thread_local%> allows dynamic initialization "
7176 if (DECL_FUNCTION_SCOPE_P (decl
))
7178 /* Emit code to perform this initialization but once. */
7179 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7180 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7181 tree guard
, guard_addr
;
7183 /* We don't need thread-safety code for thread-local vars. */
7184 bool thread_guard
= (flag_threadsafe_statics
7185 && !DECL_THREAD_LOCAL_P (decl
));
7187 /* Emit code to perform this initialization but once. This code
7190 static <type> guard;
7191 if (!guard.first_byte) {
7192 if (__cxa_guard_acquire (&guard)) {
7195 // Do initialization.
7196 flag = true; __cxa_guard_release (&guard);
7197 // Register variable for destruction at end of program.
7199 if (!flag) __cxa_guard_abort (&guard);
7203 Note that the `flag' variable is only set to 1 *after* the
7204 initialization is complete. This ensures that an exception,
7205 thrown during the construction, will cause the variable to
7206 reinitialized when we pass through this code again, as per:
7210 If the initialization exits by throwing an exception, the
7211 initialization is not complete, so it will be tried again
7212 the next time control enters the declaration.
7214 This process should be thread-safe, too; multiple threads
7215 should not be able to initialize the variable more than
7218 /* Create the guard variable. */
7219 guard
= get_guard (decl
);
7221 /* This optimization isn't safe on targets with relaxed memory
7222 consistency. On such targets we force synchronization in
7223 __cxa_guard_acquire. */
7224 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7226 /* Begin the conditional initialization. */
7227 if_stmt
= begin_if_stmt ();
7228 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7229 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7234 tree vfntype
= NULL_TREE
;
7235 tree acquire_name
, release_name
, abort_name
;
7236 tree acquire_fn
, release_fn
, abort_fn
;
7237 guard_addr
= build_address (guard
);
7239 acquire_name
= get_identifier ("__cxa_guard_acquire");
7240 release_name
= get_identifier ("__cxa_guard_release");
7241 abort_name
= get_identifier ("__cxa_guard_abort");
7242 acquire_fn
= identifier_global_value (acquire_name
);
7243 release_fn
= identifier_global_value (release_name
);
7244 abort_fn
= identifier_global_value (abort_name
);
7246 acquire_fn
= push_library_fn
7247 (acquire_name
, build_function_type_list (integer_type_node
,
7248 TREE_TYPE (guard_addr
),
7250 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7251 if (!release_fn
|| !abort_fn
)
7252 vfntype
= build_function_type_list (void_type_node
,
7253 TREE_TYPE (guard_addr
),
7256 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7257 ECF_NOTHROW
| ECF_LEAF
);
7259 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7260 ECF_NOTHROW
| ECF_LEAF
);
7262 inner_if_stmt
= begin_if_stmt ();
7263 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7266 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7267 begin
= get_target_expr (boolean_false_node
);
7268 flag
= TARGET_EXPR_SLOT (begin
);
7270 TARGET_EXPR_CLEANUP (begin
)
7271 = build3 (COND_EXPR
, void_type_node
, flag
,
7273 build_call_n (abort_fn
, 1, guard_addr
));
7274 CLEANUP_EH_ONLY (begin
) = 1;
7276 /* Do the initialization itself. */
7277 init
= add_stmt_to_compound (begin
, init
);
7278 init
= add_stmt_to_compound
7279 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7280 init
= add_stmt_to_compound
7281 (init
, build_call_n (release_fn
, 1, guard_addr
));
7284 init
= add_stmt_to_compound (init
, set_guard (guard
));
7286 /* Use atexit to register a function for destroying this static
7288 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7290 finish_expr_stmt (init
);
7294 finish_compound_stmt (inner_then_clause
);
7295 finish_then_clause (inner_if_stmt
);
7296 finish_if_stmt (inner_if_stmt
);
7299 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7301 finish_compound_stmt (then_clause
);
7302 finish_then_clause (if_stmt
);
7303 finish_if_stmt (if_stmt
);
7306 else if (DECL_THREAD_LOCAL_P (decl
))
7307 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7309 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7313 /* Make TYPE a complete type based on INITIAL_VALUE.
7314 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7315 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7316 3 if the initializer list is empty (in pedantic mode). */
7319 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7322 tree type
, elt_type
;
7324 /* Don't get confused by a CONSTRUCTOR for some other type. */
7325 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7326 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7331 unsigned HOST_WIDE_INT i
;
7334 /* An array of character type can be initialized from a
7335 brace-enclosed string constant.
7337 FIXME: this code is duplicated from reshape_init. Probably
7338 we should just call reshape_init here? */
7339 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7340 && TREE_CODE (initial_value
) == CONSTRUCTOR
7341 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7343 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7344 tree value
= (*v
)[0].value
;
7346 if (TREE_CODE (value
) == STRING_CST
7347 && v
->length () == 1)
7348 initial_value
= value
;
7351 /* If any of the elements are parameter packs, we can't actually
7352 complete this type now because the array size is dependent. */
7353 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7355 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7358 if (PACK_EXPANSION_P (value
))
7364 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7366 /* We can create the array before the element type is complete, which
7367 means that we didn't have these two bits set in the original type
7368 either. In completing the type, we are expected to propagate these
7369 bits. See also complete_type which does the same thing for arrays
7372 if (TYPE_DOMAIN (type
))
7374 elt_type
= TREE_TYPE (type
);
7375 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7376 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7377 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7383 /* As above, but either give an error or reject zero-size arrays, depending
7387 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7388 bool do_default
, tsubst_flags_t complain
)
7391 bool sfinae
= !(complain
& tf_error
);
7392 /* In SFINAE context we can't be lenient about zero-size arrays. */
7395 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7401 /* Not an error. */;
7402 else if (failure
== 1)
7403 error ("initializer fails to determine size of %qT", *ptype
);
7404 else if (failure
== 2)
7407 error ("array size missing in %qT", *ptype
);
7409 else if (failure
== 3)
7410 error ("zero-size array %qT", *ptype
);
7411 *ptype
= error_mark_node
;
7416 /* Return zero if something is declared to be a member of type
7417 CTYPE when in the context of CUR_TYPE. STRING is the error
7418 message to print in that case. Otherwise, quietly return 1. */
7421 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7423 if (ctype
&& ctype
!= cur_type
)
7425 if (flags
== DTOR_FLAG
)
7426 error ("destructor for alien class %qT cannot be a member", ctype
);
7428 error ("constructor for alien class %qT cannot be a member", ctype
);
7434 /* Subroutine of `grokdeclarator'. */
7436 /* Generate errors possibly applicable for a given set of specifiers.
7437 This is for ARM $7.1.2. */
7440 bad_specifiers (tree object
,
7441 enum bad_spec_place type
,
7452 error ("%qD declared as a %<virtual%> variable", object
);
7454 error ("%qD declared as an %<inline%> variable", object
);
7456 error ("%<const%> and %<volatile%> function specifiers on "
7457 "%qD invalid in variable declaration", object
);
7461 error ("%qD declared as a %<virtual%> parameter", object
);
7463 error ("%qD declared as an %<inline%> parameter", object
);
7465 error ("%<const%> and %<volatile%> function specifiers on "
7466 "%qD invalid in parameter declaration", object
);
7470 error ("%qD declared as a %<virtual%> type", object
);
7472 error ("%qD declared as an %<inline%> type", object
);
7474 error ("%<const%> and %<volatile%> function specifiers on "
7475 "%qD invalid in type declaration", object
);
7479 error ("%qD declared as a %<virtual%> field", object
);
7481 error ("%qD declared as an %<inline%> field", object
);
7483 error ("%<const%> and %<volatile%> function specifiers on "
7484 "%qD invalid in field declaration", object
);
7490 error ("%q+D declared as a friend", object
);
7492 && (TREE_CODE (object
) == TYPE_DECL
7493 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7494 && !TYPE_REFFN_P (TREE_TYPE (object
))
7495 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7496 error ("%q+D declared with an exception specification", object
);
7499 /* DECL is a member function or static data member and is presently
7500 being defined. Check that the definition is taking place in a
7504 check_class_member_definition_namespace (tree decl
)
7506 /* These checks only apply to member functions and static data
7508 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7509 /* We check for problems with specializations in pt.c in
7510 check_specialization_namespace, where we can issue better
7512 if (processing_specialization
)
7514 /* There are no restrictions on the placement of
7515 explicit instantiations. */
7516 if (processing_explicit_instantiation
)
7520 A member function definition that appears outside of the
7521 class definition shall appear in a namespace scope enclosing
7522 the class definition.
7526 The definition for a static data member shall appear in a
7527 namespace scope enclosing the member's class definition. */
7528 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7529 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7530 decl
, DECL_CONTEXT (decl
));
7533 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7534 METHOD_TYPE for a non-static member function; QUALS are the
7535 cv-qualifiers that apply to the function. */
7538 build_this_parm (tree type
, cp_cv_quals quals
)
7543 cp_cv_quals this_quals
;
7545 if (CLASS_TYPE_P (type
))
7548 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7549 this_type
= build_pointer_type (this_type
);
7552 this_type
= type_of_this_parm (type
);
7553 /* The `this' parameter is implicitly `const'; it cannot be
7555 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7556 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7557 parm
= build_artificial_parm (this_identifier
, qual_type
);
7558 cp_apply_type_quals_to_decl (this_quals
, parm
);
7562 /* DECL is a static member function. Complain if it was declared
7563 with function-cv-quals. */
7566 check_static_quals (tree decl
, cp_cv_quals quals
)
7568 if (quals
!= TYPE_UNQUALIFIED
)
7569 error ("static member function %q#D declared with type qualifiers",
7573 /* Helper function. Replace the temporary this parameter injected
7574 during cp_finish_omp_declare_simd with the real this parameter. */
7577 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7579 tree this_parm
= (tree
) data
;
7580 if (TREE_CODE (*tp
) == PARM_DECL
7581 && DECL_NAME (*tp
) == this_identifier
7582 && *tp
!= this_parm
)
7584 else if (TYPE_P (*tp
))
7589 /* CTYPE is class type, or null if non-class.
7590 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7592 DECLARATOR is the function's name.
7593 PARMS is a chain of PARM_DECLs for the function.
7594 VIRTUALP is truthvalue of whether the function is virtual or not.
7595 FLAGS are to be passed through to `grokclassfn'.
7596 QUALS are qualifiers indicating whether the function is `const'
7598 RAISES is a list of exceptions that this function can raise.
7599 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7600 not look, and -1 if we should not call `grokclassfn' at all.
7602 SFK is the kind of special function (if any) for the new function.
7604 Returns `NULL_TREE' if something goes wrong, after issuing
7605 applicable error messages. */
7608 grokfndecl (tree ctype
,
7612 tree orig_declarator
,
7614 enum overload_flags flags
,
7616 cp_ref_qualifier rqual
,
7623 special_function_kind sfk
,
7628 location_t location
)
7631 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7635 type
= build_ref_qualified_type (type
, rqual
);
7637 type
= build_exception_variant (type
, raises
);
7639 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7641 /* If we have an explicit location, use it, otherwise use whatever
7642 build_lang_decl used (probably input_location). */
7643 if (location
!= UNKNOWN_LOCATION
)
7644 DECL_SOURCE_LOCATION (decl
) = location
;
7646 if (TREE_CODE (type
) == METHOD_TYPE
)
7649 parm
= build_this_parm (type
, quals
);
7650 DECL_CHAIN (parm
) = parms
;
7653 DECL_ARGUMENTS (decl
) = parms
;
7654 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7655 DECL_CONTEXT (t
) = decl
;
7656 /* Propagate volatile out from type to decl. */
7657 if (TYPE_VOLATILE (type
))
7658 TREE_THIS_VOLATILE (decl
) = 1;
7660 /* Setup decl according to sfk. */
7663 case sfk_constructor
:
7664 case sfk_copy_constructor
:
7665 case sfk_move_constructor
:
7666 DECL_CONSTRUCTOR_P (decl
) = 1;
7668 case sfk_destructor
:
7669 DECL_DESTRUCTOR_P (decl
) = 1;
7675 /* If pointers to member functions use the least significant bit to
7676 indicate whether a function is virtual, ensure a pointer
7677 to this function will have that bit clear. */
7678 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7679 && TREE_CODE (type
) == METHOD_TYPE
7680 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7681 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7684 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7688 ("defining explicit specialization %qD in friend declaration",
7692 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7693 tree args
= TREE_OPERAND (orig_declarator
, 1);
7695 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7697 /* Something like `template <class T> friend void f<T>()'. */
7698 error ("invalid use of template-id %qD in declaration "
7699 "of primary template",
7705 /* A friend declaration of the form friend void f<>(). Record
7706 the information in the TEMPLATE_ID_EXPR. */
7707 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7709 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7710 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7712 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7713 if (TREE_PURPOSE (t
)
7714 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7716 error ("default arguments are not allowed in declaration "
7717 "of friend template specialization %qD",
7723 error ("%<inline%> is not allowed in declaration of friend "
7724 "template specialization %qD",
7727 error ("%<constexpr%> is not allowed in declaration of friend "
7728 "template specialization %qD",
7735 /* If this decl has namespace scope, set that up. */
7737 set_decl_namespace (decl
, in_namespace
, friendp
);
7739 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7741 /* `main' and builtins have implicit 'C' linkage. */
7742 if ((MAIN_NAME_P (declarator
)
7743 || (IDENTIFIER_LENGTH (declarator
) > 10
7744 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7745 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7746 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7747 || (targetcm
.cxx_implicit_extern_c
7748 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7749 && current_lang_name
== lang_name_cplusplus
7750 && ctype
== NULL_TREE
7751 && DECL_FILE_SCOPE_P (decl
))
7752 SET_DECL_LANGUAGE (decl
, lang_c
);
7754 /* Should probably propagate const out from type to decl I bet (mrs). */
7757 DECL_STATIC_FUNCTION_P (decl
) = 1;
7758 DECL_CONTEXT (decl
) = ctype
;
7762 DECL_DELETED_FN (decl
) = 1;
7766 DECL_CONTEXT (decl
) = ctype
;
7768 check_class_member_definition_namespace (decl
);
7771 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7773 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7774 error ("cannot declare %<::main%> to be a template");
7776 error ("cannot declare %<::main%> to be inline");
7778 error ("cannot declare %<::main%> to be constexpr");
7780 error ("cannot declare %<::main%> to be static");
7785 /* Members of anonymous types and local classes have no linkage; make
7786 them internal. If a typedef is made later, this will be changed. */
7787 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7788 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7791 if (publicp
&& cxx_dialect
== cxx98
)
7793 /* [basic.link]: A name with no linkage (notably, the name of a class
7794 or enumeration declared in a local scope) shall not be used to
7795 declare an entity with linkage.
7797 DR 757 relaxes this restriction for C++0x. */
7798 no_linkage_error (decl
);
7801 TREE_PUBLIC (decl
) = publicp
;
7804 DECL_INTERFACE_KNOWN (decl
) = 1;
7805 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7808 /* If the declaration was declared inline, mark it as such. */
7811 DECL_DECLARED_INLINE_P (decl
) = 1;
7813 DECL_COMDAT (decl
) = 1;
7816 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7818 DECL_EXTERNAL (decl
) = 1;
7819 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7824 ? G_("static member function %qD cannot have cv-qualifier")
7825 : G_("non-member function %qD cannot have cv-qualifier"),
7827 quals
= TYPE_UNQUALIFIED
;
7833 ? G_("static member function %qD cannot have ref-qualifier")
7834 : G_("non-member function %qD cannot have ref-qualifier"),
7836 rqual
= REF_QUAL_NONE
;
7840 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7841 && !grok_op_properties (decl
, /*complain=*/true))
7843 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7845 bool long_long_unsigned_p
;
7847 const char *suffix
= NULL
;
7848 /* [over.literal]/6: Literal operators shall not have C linkage. */
7849 if (DECL_LANGUAGE (decl
) == lang_c
)
7851 error ("literal operator with C linkage");
7855 if (DECL_NAMESPACE_SCOPE_P (decl
))
7857 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7860 error ("%qD has invalid argument list", decl
);
7864 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7865 if (long_long_unsigned_p
)
7867 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7868 warning (0, "integer suffix %<%s%>"
7869 " shadowed by implementation", suffix
);
7871 else if (long_double_p
)
7873 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7874 warning (0, "floating point suffix %<%s%>"
7875 " shadowed by implementation", suffix
);
7880 error ("%qD must be a non-member function", decl
);
7886 /* Make the init_value nonzero so pushdecl knows this is not
7887 tentative. error_mark_node is replaced later with the BLOCK. */
7888 DECL_INITIAL (decl
) = error_mark_node
;
7890 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7891 TREE_NOTHROW (decl
) = 1;
7893 if (flag_openmp
|| flag_cilkplus
)
7895 /* Adjust "omp declare simd" attributes. */
7896 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7900 for (attr
= ods
; attr
;
7901 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7903 if (TREE_CODE (type
) == METHOD_TYPE
)
7904 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7905 DECL_ARGUMENTS (decl
), NULL
);
7906 if (TREE_VALUE (attr
) != NULL_TREE
)
7908 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7909 cl
= c_omp_declare_simd_clauses_to_numbers
7910 (DECL_ARGUMENTS (decl
), cl
);
7912 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7914 TREE_VALUE (attr
) = NULL_TREE
;
7920 /* Caller will do the rest of this. */
7924 if (ctype
!= NULL_TREE
)
7925 grokclassfn (ctype
, decl
, flags
);
7928 if (cxx_dialect
>= cxx11
7929 && DECL_DESTRUCTOR_P (decl
)
7930 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7931 && !processing_template_decl
)
7932 deduce_noexcept_on_destructor (decl
);
7934 decl
= check_explicit_specialization (orig_declarator
, decl
,
7937 4 * (friendp
!= 0));
7938 if (decl
== error_mark_node
)
7941 if (DECL_STATIC_FUNCTION_P (decl
))
7942 check_static_quals (decl
, quals
);
7946 cplus_decl_attributes (&decl
, *attrlist
, 0);
7947 *attrlist
= NULL_TREE
;
7950 /* Check main's type after attributes have been applied. */
7951 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7953 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7956 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7958 error ("%<::main%> must return %<int%>");
7959 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7960 TREE_TYPE (decl
) = newtype
;
7963 check_main_parameter_types (decl
);
7966 if (ctype
!= NULL_TREE
7967 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7970 tree old_decl
= check_classfn (ctype
, decl
,
7971 (processing_template_decl
7972 > template_class_depth (ctype
))
7973 ? current_template_parms
7976 if (old_decl
== error_mark_node
)
7984 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7985 /* Because grokfndecl is always supposed to return a
7986 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7987 here. We depend on our callers to figure out that its
7988 really a template that's being returned. */
7989 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7991 if (DECL_STATIC_FUNCTION_P (old_decl
)
7992 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7994 /* Remove the `this' parm added by grokclassfn. */
7995 revert_static_member_fn (decl
);
7996 check_static_quals (decl
, quals
);
7998 if (DECL_ARTIFICIAL (old_decl
))
8000 error ("definition of implicitly-declared %qD", old_decl
);
8003 else if (DECL_DEFAULTED_FN (old_decl
))
8005 error ("definition of explicitly-defaulted %q+D", decl
);
8006 error ("%q+#D explicitly defaulted here", old_decl
);
8010 /* Since we've smashed OLD_DECL to its
8011 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8012 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8013 decl
= DECL_TEMPLATE_RESULT (decl
);
8015 /* Attempt to merge the declarations. This can fail, in
8016 the case of some invalid specialization declarations. */
8017 pushed_scope
= push_scope (ctype
);
8018 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8020 pop_scope (pushed_scope
);
8023 error ("no %q#D member function declared in class %qT",
8027 if (ok
== error_mark_node
)
8033 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8036 if (ctype
== NULL_TREE
|| check
)
8040 DECL_VIRTUAL_P (decl
) = 1;
8045 /* decl is a FUNCTION_DECL.
8046 specifiers are the parsed virt-specifiers.
8048 Set flags to reflect the virt-specifiers.
8053 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8055 if (decl
== NULL_TREE
)
8057 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8058 DECL_OVERRIDE_P (decl
) = 1;
8059 if (specifiers
& VIRT_SPEC_FINAL
)
8060 DECL_FINAL_P (decl
) = 1;
8064 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8065 the linkage that DECL will receive in the object file. */
8068 set_linkage_for_static_data_member (tree decl
)
8070 /* A static data member always has static storage duration and
8071 external linkage. Note that static data members are forbidden in
8072 local classes -- the only situation in which a class has
8073 non-external linkage. */
8074 TREE_PUBLIC (decl
) = 1;
8075 TREE_STATIC (decl
) = 1;
8076 /* For non-template classes, static data members are always put
8077 out in exactly those files where they are defined, just as
8078 with ordinary namespace-scope variables. */
8079 if (!processing_template_decl
)
8080 DECL_INTERFACE_KNOWN (decl
) = 1;
8083 /* Create a VAR_DECL named NAME with the indicated TYPE.
8085 If SCOPE is non-NULL, it is the class type or namespace containing
8086 the variable. If SCOPE is NULL, the variable should is created in
8087 the innermost enclosing scope. */
8090 grokvardecl (tree type
,
8092 tree orig_declarator
,
8093 const cp_decl_specifier_seq
*declspecs
,
8100 tree explicit_scope
;
8102 gcc_assert (!name
|| identifier_p (name
));
8104 /* Compute the scope in which to place the variable, but remember
8105 whether or not that scope was explicitly specified by the user. */
8106 explicit_scope
= scope
;
8109 /* An explicit "extern" specifier indicates a namespace-scope
8111 if (declspecs
->storage_class
== sc_extern
)
8112 scope
= current_decl_namespace ();
8113 else if (!at_function_scope_p ())
8114 scope
= current_scope ();
8118 && (/* If the variable is a namespace-scope variable declared in a
8119 template, we need DECL_LANG_SPECIFIC. */
8120 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8121 /* Similarly for namespace-scope variables with language linkage
8123 || (TREE_CODE (scope
) == NAMESPACE_DECL
8124 && current_lang_name
!= lang_name_cplusplus
)
8125 /* Similarly for static data members. */
8127 /* Similarly for explicit specializations. */
8129 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8130 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8132 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8134 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8135 set_decl_namespace (decl
, explicit_scope
, 0);
8137 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8139 if (declspecs
->storage_class
== sc_extern
)
8141 DECL_THIS_EXTERN (decl
) = 1;
8142 DECL_EXTERNAL (decl
) = !initialized
;
8145 if (DECL_CLASS_SCOPE_P (decl
))
8147 set_linkage_for_static_data_member (decl
);
8148 /* This function is only called with out-of-class definitions. */
8149 DECL_EXTERNAL (decl
) = 0;
8150 check_class_member_definition_namespace (decl
);
8152 /* At top level, either `static' or no s.c. makes a definition
8153 (perhaps tentative), and absence of `static' makes it public. */
8154 else if (toplevel_bindings_p ())
8156 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8157 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8158 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8160 /* Not at top level, only `static' makes a static definition. */
8163 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8164 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8167 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8169 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8170 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8171 if (declspecs
->gnu_thread_keyword_p
)
8172 DECL_GNU_TLS_P (decl
) = true;
8175 /* If the type of the decl has no linkage, make sure that we'll
8176 notice that in mark_used. */
8177 if (cxx_dialect
> cxx98
8178 && decl_linkage (decl
) != lk_none
8179 && DECL_LANG_SPECIFIC (decl
) == NULL
8180 && !DECL_EXTERN_C_P (decl
)
8181 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8182 retrofit_lang_decl (decl
);
8184 if (TREE_PUBLIC (decl
))
8186 /* [basic.link]: A name with no linkage (notably, the name of a class
8187 or enumeration declared in a local scope) shall not be used to
8188 declare an entity with linkage.
8190 DR 757 relaxes this restriction for C++0x. */
8191 if (cxx_dialect
< cxx11
)
8192 no_linkage_error (decl
);
8195 DECL_INTERFACE_KNOWN (decl
) = 1;
8197 // Handle explicit specializations and instantiations of variable templates.
8198 if (orig_declarator
)
8199 decl
= check_explicit_specialization (orig_declarator
, decl
,
8202 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8205 /* Create and return a canonical pointer to member function type, for
8206 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8209 build_ptrmemfunc_type (tree type
)
8214 if (type
== error_mark_node
)
8217 /* If a canonical type already exists for this type, use it. We use
8218 this method instead of type_hash_canon, because it only does a
8219 simple equality check on the list of field members. */
8221 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8224 /* Make sure that we always have the unqualified pointer-to-member
8226 if (cp_cv_quals quals
= cp_type_quals (type
))
8228 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8229 return cp_build_qualified_type (unqual
, quals
);
8232 t
= make_node (RECORD_TYPE
);
8234 /* Let the front end know this is a pointer to member function. */
8235 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8237 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8240 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8242 DECL_CHAIN (field
) = fields
;
8245 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8247 /* Zap out the name so that the back end will give us the debugging
8248 information for this anonymous RECORD_TYPE. */
8249 TYPE_NAME (t
) = NULL_TREE
;
8251 /* Cache this pointer-to-member type so that we can find it again
8253 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8255 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8256 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8257 else if (TYPE_CANONICAL (type
) != type
)
8258 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8263 /* Create and return a pointer to data member type. */
8266 build_ptrmem_type (tree class_type
, tree member_type
)
8268 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8270 cp_cv_quals quals
= type_memfn_quals (member_type
);
8271 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8272 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8273 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8277 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8278 return build_offset_type (class_type
, member_type
);
8282 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8283 Check to see that the definition is valid. Issue appropriate error
8284 messages. Return 1 if the definition is particularly bad, or 0
8288 check_static_variable_definition (tree decl
, tree type
)
8290 /* Can't check yet if we don't know the type. */
8291 if (dependent_type_p (type
))
8293 /* If DECL is declared constexpr, we'll do the appropriate checks
8294 in check_initializer. */
8295 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8297 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8299 if (!COMPLETE_TYPE_P (type
))
8300 error ("in-class initialization of static data member %q#D of "
8301 "incomplete type", decl
);
8302 else if (literal_type_p (type
))
8303 permerror (input_location
,
8304 "%<constexpr%> needed for in-class initialization of "
8305 "static data member %q#D of non-integral type", decl
);
8307 error ("in-class initialization of static data member %q#D of "
8308 "non-literal type", decl
);
8312 /* Motion 10 at San Diego: If a static const integral data member is
8313 initialized with an integral constant expression, the initializer
8314 may appear either in the declaration (within the class), or in
8315 the definition, but not both. If it appears in the class, the
8316 member is a member constant. The file-scope definition is always
8318 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8320 error ("invalid in-class initialization of static data member "
8321 "of non-integral type %qT",
8325 else if (!CP_TYPE_CONST_P (type
))
8326 error ("ISO C++ forbids in-class initialization of non-const "
8327 "static member %qD",
8329 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8330 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8331 "%qD of non-integral type %qT", decl
, type
);
8336 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8337 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8338 expressions out into temporary variables so that walk_tree doesn't
8339 step into them (c++/15764). */
8342 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8344 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8345 tree expr
= *expr_p
;
8346 if (TREE_CODE (expr
) == SAVE_EXPR
)
8348 tree op
= TREE_OPERAND (expr
, 0);
8349 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8350 if (TREE_SIDE_EFFECTS (op
))
8351 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8354 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8359 /* Entry point for the above. */
8362 stabilize_vla_size (tree size
)
8364 hash_set
<tree
> pset
;
8365 /* Break out any function calls into temporary variables. */
8366 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8369 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8370 not inside of SAVE_EXPR and fold them. */
8373 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8375 tree expr
= *expr_p
;
8376 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8378 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8380 *(bool *)data
= true;
8381 if (SIZEOF_EXPR_TYPE_P (expr
))
8382 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8383 SIZEOF_EXPR
, false);
8384 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8385 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8388 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8390 if (expr
== error_mark_node
)
8391 expr
= size_one_node
;
8398 /* Given the SIZE (i.e., number of elements) in an array, compute an
8399 appropriate index type for the array. If non-NULL, NAME is the
8400 name of the thing being declared. */
8403 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8408 if (error_operand_p (size
))
8409 return error_mark_node
;
8411 if (!type_dependent_expression_p (size
))
8413 tree type
= TREE_TYPE (size
);
8415 mark_rvalue_use (size
);
8417 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8418 && TREE_SIDE_EFFECTS (size
))
8419 /* In C++98, we mark a non-constant array bound with a magic
8420 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8423 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8425 if (CLASS_TYPE_P (type
)
8426 && CLASSTYPE_LITERAL_P (type
))
8428 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8431 if (!(complain
& tf_error
))
8432 return error_mark_node
;
8434 error ("size of array %qD has non-integral type %qT",
8437 error ("size of array has non-integral type %qT", type
);
8438 size
= integer_one_node
;
8440 if (size
== error_mark_node
)
8441 return error_mark_node
;
8442 type
= TREE_TYPE (size
);
8445 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8446 size
= maybe_constant_value (size
);
8448 if (!TREE_CONSTANT (size
))
8452 if (error_operand_p (size
))
8453 return error_mark_node
;
8455 /* The array bound must be an integer type. */
8456 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8458 if (!(complain
& tf_error
))
8459 return error_mark_node
;
8461 error ("size of array %qD has non-integral type %qT", name
, type
);
8463 error ("size of array has non-integral type %qT", type
);
8464 size
= integer_one_node
;
8465 type
= TREE_TYPE (size
);
8469 /* A type is dependent if it is...an array type constructed from any
8470 dependent type or whose size is specified by a constant expression
8471 that is value-dependent. */
8472 /* We can only call value_dependent_expression_p on integral constant
8473 expressions; treat non-constant expressions as dependent, too. */
8474 if (processing_template_decl
8475 && (type_dependent_expression_p (size
)
8476 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8478 /* We cannot do any checking for a SIZE that isn't known to be
8479 constant. Just build the index type and mark that it requires
8480 structural equality checks. */
8481 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8482 size
, size_one_node
));
8483 TYPE_DEPENDENT_P (itype
) = 1;
8484 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8485 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8489 /* Normally, the array-bound will be a constant. */
8490 if (TREE_CODE (size
) == INTEGER_CST
)
8492 /* Check to see if the array bound overflowed. Make that an
8493 error, no matter how generous we're being. */
8494 constant_expression_error (size
);
8496 /* An array must have a positive number of elements. */
8497 if (tree_int_cst_lt (size
, integer_zero_node
))
8499 if (!(complain
& tf_error
))
8500 return error_mark_node
;
8502 error ("size of array %qD is negative", name
);
8504 error ("size of array is negative");
8505 size
= integer_one_node
;
8507 /* As an extension we allow zero-sized arrays. */
8508 else if (integer_zerop (size
))
8510 if (!(complain
& tf_error
))
8511 /* We must fail if performing argument deduction (as
8512 indicated by the state of complain), so that
8513 another substitution can be found. */
8514 return error_mark_node
;
8515 else if (in_system_header_at (input_location
))
8516 /* Allow them in system headers because glibc uses them. */;
8518 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8520 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8523 else if (TREE_CONSTANT (size
)
8524 /* We don't allow VLAs at non-function scopes, or during
8525 tentative template substitution. */
8526 || !at_function_scope_p ()
8527 || !(complain
& tf_error
))
8529 if (!(complain
& tf_error
))
8530 return error_mark_node
;
8531 /* `(int) &fn' is not a valid array bound. */
8533 error ("size of array %qD is not an integral constant-expression",
8536 error ("size of array is not an integral constant-expression");
8537 size
= integer_one_node
;
8539 else if (pedantic
&& warn_vla
!= 0)
8542 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8544 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8546 else if (warn_vla
> 0)
8550 "variable length array %qD is used", name
);
8553 "variable length array is used");
8556 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8557 /* A variable sized array. */
8558 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8561 HOST_WIDE_INT saved_processing_template_decl
;
8563 /* Compute the index of the largest element in the array. It is
8564 one less than the number of elements in the array. We save
8565 and restore PROCESSING_TEMPLATE_DECL so that computations in
8566 cp_build_binary_op will be appropriately folded. */
8567 saved_processing_template_decl
= processing_template_decl
;
8568 processing_template_decl
= 0;
8569 itype
= cp_build_binary_op (input_location
,
8571 cp_convert (ssizetype
, size
, complain
),
8572 cp_convert (ssizetype
, integer_one_node
,
8575 itype
= fold (itype
);
8576 processing_template_decl
= saved_processing_template_decl
;
8578 if (!TREE_CONSTANT (itype
))
8580 /* A variable sized array. */
8581 itype
= variable_size (itype
);
8583 if (TREE_CODE (itype
) != SAVE_EXPR
)
8585 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8586 they might survive till gimplification. */
8587 tree newitype
= itype
;
8589 cp_walk_tree_without_duplicates (&newitype
,
8590 fold_sizeof_expr_r
, &found
);
8592 itype
= variable_size (fold (newitype
));
8595 stabilize_vla_size (itype
);
8597 if (flag_sanitize
& SANITIZE_VLA
8598 && current_function_decl
!= NULL_TREE
8599 && !lookup_attribute ("no_sanitize_undefined",
8601 (current_function_decl
)))
8603 /* We have to add 1 -- in the ubsan routine we generate
8604 LE_EXPR rather than LT_EXPR. */
8605 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8606 build_one_cst (TREE_TYPE (itype
)));
8607 t
= ubsan_instrument_vla (input_location
, t
);
8608 finish_expr_stmt (t
);
8611 /* Make sure that there was no overflow when creating to a signed
8612 index type. (For example, on a 32-bit machine, an array with
8613 size 2^32 - 1 is too big.) */
8614 else if (TREE_CODE (itype
) == INTEGER_CST
8615 && TREE_OVERFLOW (itype
))
8617 if (!(complain
& tf_error
))
8618 return error_mark_node
;
8619 error ("overflow in array dimension");
8620 TREE_OVERFLOW (itype
) = 0;
8624 /* Create and return the appropriate index type. */
8625 itype
= build_index_type (itype
);
8627 /* If the index type were dependent, we would have returned early, so
8628 remember that it isn't. */
8629 TYPE_DEPENDENT_P (itype
) = 0;
8630 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8634 /* Returns the scope (if any) in which the entity declared by
8635 DECLARATOR will be located. If the entity was declared with an
8636 unqualified name, NULL_TREE is returned. */
8639 get_scope_of_declarator (const cp_declarator
*declarator
)
8641 while (declarator
&& declarator
->kind
!= cdk_id
)
8642 declarator
= declarator
->declarator
;
8644 /* If the declarator-id is a SCOPE_REF, the scope in which the
8645 declaration occurs is the first operand. */
8647 && declarator
->u
.id
.qualifying_scope
)
8648 return declarator
->u
.id
.qualifying_scope
;
8650 /* Otherwise, the declarator is not a qualified name; the entity will
8651 be declared in the current scope. */
8655 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8656 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8660 create_array_type_for_decl (tree name
, tree type
, tree size
)
8662 tree itype
= NULL_TREE
;
8664 /* If things have already gone awry, bail now. */
8665 if (type
== error_mark_node
|| size
== error_mark_node
)
8666 return error_mark_node
;
8668 /* 8.3.4/1: If the type of the identifier of D contains the auto
8669 type-specifier, the program is ill-formed. */
8670 if (type_uses_auto (type
))
8672 error ("%qD declared as array of %qT", name
, type
);
8673 return error_mark_node
;
8676 /* If there are some types which cannot be array elements,
8677 issue an error-message and return. */
8678 switch (TREE_CODE (type
))
8682 error ("declaration of %qD as array of void", name
);
8684 error ("creating array of void");
8685 return error_mark_node
;
8689 error ("declaration of %qD as array of functions", name
);
8691 error ("creating array of functions");
8692 return error_mark_node
;
8694 case REFERENCE_TYPE
:
8696 error ("declaration of %qD as array of references", name
);
8698 error ("creating array of references");
8699 return error_mark_node
;
8703 error ("declaration of %qD as array of function members", name
);
8705 error ("creating array of function members");
8706 return error_mark_node
;
8714 The constant expressions that specify the bounds of the arrays
8715 can be omitted only for the first member of the sequence. */
8716 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8719 error ("declaration of %qD as multidimensional array must "
8720 "have bounds for all dimensions except the first",
8723 error ("multidimensional array must have bounds for all "
8724 "dimensions except the first");
8726 return error_mark_node
;
8729 /* Figure out the index type for the array. */
8731 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8734 T is called the array element type; this type shall not be [...] an
8735 abstract class type. */
8736 abstract_virtuals_error (name
, type
);
8738 return build_cplus_array_type (type
, itype
);
8741 /* Check that it's OK to declare a function with the indicated TYPE.
8742 SFK indicates the kind of special function (if any) that this
8743 function is. OPTYPE is the type given in a conversion operator
8744 declaration, or the class type for a constructor/destructor.
8745 Returns the actual return type of the function; that
8746 may be different than TYPE if an error occurs, or for certain
8747 special functions. */
8750 check_special_function_return_type (special_function_kind sfk
,
8756 case sfk_constructor
:
8758 error ("return type specification for constructor invalid");
8760 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8761 type
= build_pointer_type (optype
);
8763 type
= void_type_node
;
8766 case sfk_destructor
:
8768 error ("return type specification for destructor invalid");
8769 /* We can't use the proper return type here because we run into
8770 problems with ambiguous bases and covariant returns.
8771 Java classes are left unchanged because (void *) isn't a valid
8772 Java type, and we don't want to change the Java ABI. */
8773 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8774 type
= build_pointer_type (void_type_node
);
8776 type
= void_type_node
;
8779 case sfk_conversion
:
8781 error ("return type specified for %<operator %T%>", optype
);
8792 /* A variable or data member (whose unqualified name is IDENTIFIER)
8793 has been declared with the indicated TYPE. If the TYPE is not
8794 acceptable, issue an error message and return a type to use for
8795 error-recovery purposes. */
8798 check_var_type (tree identifier
, tree type
)
8800 if (VOID_TYPE_P (type
))
8803 error ("unnamed variable or field declared void");
8804 else if (identifier_p (identifier
))
8806 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8807 error ("variable or field %qE declared void", identifier
);
8810 error ("variable or field declared void");
8811 type
= error_mark_node
;
8817 /* Given declspecs and a declarator (abstract or otherwise), determine
8818 the name and type of the object declared and construct a DECL node
8821 DECLSPECS points to the representation of declaration-specifier
8822 sequence that precedes declarator.
8824 DECL_CONTEXT says which syntactic context this declaration is in:
8825 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8826 FUNCDEF for a function definition. Like NORMAL but a few different
8827 error messages in each case. Return value may be zero meaning
8828 this definition is too screwy to try to parse.
8829 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8830 handle member functions (which have FIELD context).
8831 Return value may be zero meaning this definition is too screwy to
8833 PARM for a parameter declaration (either within a function prototype
8834 or before a function body). Make a PARM_DECL, or return void_type_node.
8835 TPARM for a template parameter declaration.
8836 CATCHPARM for a parameter declaration before a catch clause.
8837 TYPENAME if for a typename (in a cast or sizeof).
8838 Don't make a DECL node; just return the ..._TYPE node.
8839 FIELD for a struct or union field; make a FIELD_DECL.
8840 BITFIELD for a field with specified width.
8842 INITIALIZED is as for start_decl.
8844 ATTRLIST is a pointer to the list of attributes, which may be NULL
8845 if there are none; *ATTRLIST may be modified if attributes from inside
8846 the declarator should be applied to the declaration.
8848 When this function is called, scoping variables (such as
8849 CURRENT_CLASS_TYPE) should reflect the scope in which the
8850 declaration occurs, not the scope in which the new declaration will
8851 be placed. For example, on:
8855 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8858 Returns a DECL (if a declarator is present), a TYPE (if there is no
8859 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8863 grokdeclarator (const cp_declarator
*declarator
,
8864 cp_decl_specifier_seq
*declspecs
,
8865 enum decl_context decl_context
,
8869 tree type
= NULL_TREE
;
8871 int explicit_intN
= 0;
8872 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8873 int explicit_int
= 0;
8874 int explicit_char
= 0;
8875 int defaulted_int
= 0;
8877 tree typedef_decl
= NULL_TREE
;
8878 const char *name
= NULL
;
8879 tree typedef_type
= NULL_TREE
;
8880 /* True if this declarator is a function definition. */
8881 bool funcdef_flag
= false;
8882 cp_declarator_kind innermost_code
= cdk_error
;
8885 /* See the code below that used this. */
8886 tree decl_attr
= NULL_TREE
;
8889 /* Keep track of what sort of function is being processed
8890 so that we can warn about default return values, or explicit
8891 return values which do not match prescribed defaults. */
8892 special_function_kind sfk
= sfk_none
;
8894 tree dname
= NULL_TREE
;
8895 tree ctor_return_type
= NULL_TREE
;
8896 enum overload_flags flags
= NO_SPECIAL
;
8897 /* cv-qualifiers that apply to the declarator, for a declaration of
8898 a member function. */
8899 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8900 /* virt-specifiers that apply to the declarator, for a declaration of
8901 a member function. */
8902 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8903 /* ref-qualifier that applies to the declarator, for a declaration of
8904 a member function. */
8905 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8906 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8908 tree raises
= NULL_TREE
;
8909 int template_count
= 0;
8910 tree returned_attrs
= NULL_TREE
;
8911 tree parms
= NULL_TREE
;
8912 const cp_declarator
*id_declarator
;
8913 /* The unqualified name of the declarator; either an
8914 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8915 tree unqualified_id
;
8916 /* The class type, if any, in which this entity is located,
8917 or NULL_TREE if none. Note that this value may be different from
8918 the current class type; for example if an attempt is made to declare
8919 "A::f" inside "B", this value will be "A". */
8920 tree ctype
= current_class_type
;
8921 /* The NAMESPACE_DECL for the namespace in which this entity is
8922 located. If an unqualified name is used to declare the entity,
8923 this value will be NULL_TREE, even if the entity is located at
8925 tree in_namespace
= NULL_TREE
;
8926 cp_storage_class storage_class
;
8927 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8928 bool type_was_error_mark_node
= false;
8929 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8930 bool template_type_arg
= false;
8931 bool template_parm_flag
= false;
8932 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8933 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8934 bool late_return_type_p
= false;
8935 bool array_parameter_p
= false;
8936 source_location saved_loc
= input_location
;
8939 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8940 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8941 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8942 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8943 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8944 explicit_intN
= declspecs
->explicit_intN_p
;
8945 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8947 if (decl_context
== FUNCDEF
)
8948 funcdef_flag
= true, decl_context
= NORMAL
;
8949 else if (decl_context
== MEMFUNCDEF
)
8950 funcdef_flag
= true, decl_context
= FIELD
;
8951 else if (decl_context
== BITFIELD
)
8952 bitfield
= 1, decl_context
= FIELD
;
8953 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8954 template_type_arg
= true, decl_context
= TYPENAME
;
8955 else if (decl_context
== TPARM
)
8956 template_parm_flag
= true, decl_context
= PARM
;
8958 if (initialized
> 1)
8959 funcdef_flag
= true;
8961 /* Look inside a declarator for the name being declared
8962 and get it as a string, for an error message. */
8963 for (id_declarator
= declarator
;
8965 id_declarator
= id_declarator
->declarator
)
8967 if (id_declarator
->kind
!= cdk_id
)
8968 innermost_code
= id_declarator
->kind
;
8970 switch (id_declarator
->kind
)
8973 if (id_declarator
->declarator
8974 && id_declarator
->declarator
->kind
== cdk_id
)
8976 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8977 if (sfk
== sfk_destructor
)
8984 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8985 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8988 if (qualifying_scope
)
8990 if (at_function_scope_p ())
8994 A declarator-id shall not be qualified except
8997 None of the cases are permitted in block
8999 if (qualifying_scope
== global_namespace
)
9000 error ("invalid use of qualified-name %<::%D%>",
9002 else if (TYPE_P (qualifying_scope
))
9003 error ("invalid use of qualified-name %<%T::%D%>",
9004 qualifying_scope
, decl
);
9006 error ("invalid use of qualified-name %<%D::%D%>",
9007 qualifying_scope
, decl
);
9008 return error_mark_node
;
9010 else if (TYPE_P (qualifying_scope
))
9012 ctype
= qualifying_scope
;
9013 if (!MAYBE_CLASS_TYPE_P (ctype
))
9015 error ("%q#T is not a class or a namespace", ctype
);
9018 else if (innermost_code
!= cdk_function
9019 && current_class_type
9020 && !uniquely_derived_from_p (ctype
,
9021 current_class_type
))
9023 error ("invalid use of qualified-name %<%T::%D%>",
9024 qualifying_scope
, decl
);
9025 return error_mark_node
;
9028 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9029 in_namespace
= qualifying_scope
;
9031 switch (TREE_CODE (decl
))
9037 if (innermost_code
!= cdk_function
)
9039 error ("declaration of %qD as non-function", decl
);
9040 return error_mark_node
;
9042 else if (!qualifying_scope
9043 && !(current_class_type
&& at_class_scope_p ()))
9045 error ("declaration of %qD as non-member", decl
);
9046 return error_mark_node
;
9049 type
= TREE_OPERAND (decl
, 0);
9051 type
= constructor_name (type
);
9052 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9057 case TEMPLATE_ID_EXPR
:
9059 tree fns
= TREE_OPERAND (decl
, 0);
9062 if (!identifier_p (dname
))
9064 if (variable_template_p (dname
))
9065 dname
= DECL_NAME (dname
);
9068 gcc_assert (is_overloaded_fn (dname
));
9069 dname
= DECL_NAME (get_first_fn (dname
));
9075 case IDENTIFIER_NODE
:
9076 if (identifier_p (decl
))
9079 if (C_IS_RESERVED_WORD (dname
))
9081 error ("declarator-id missing; using reserved word %qD",
9083 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9085 else if (!IDENTIFIER_TYPENAME_P (dname
))
9086 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9089 gcc_assert (flags
== NO_SPECIAL
);
9090 flags
= TYPENAME_FLAG
;
9091 ctor_return_type
= TREE_TYPE (dname
);
9092 sfk
= sfk_conversion
;
9093 if (is_typename_at_global_scope (dname
))
9094 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9096 name
= "<invalid operator>";
9113 return error_mark_node
;
9118 if (id_declarator
->kind
== cdk_id
)
9124 The declarator in a function-definition shall have the form
9125 D1 ( parameter-declaration-clause) ... */
9126 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9128 error ("function definition does not declare parameters");
9129 return error_mark_node
;
9132 if (flags
== TYPENAME_FLAG
9133 && innermost_code
!= cdk_function
9134 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9136 error ("declaration of %qD as non-function", dname
);
9137 return error_mark_node
;
9141 && identifier_p (dname
)
9142 && UDLIT_OPER_P (dname
)
9143 && innermost_code
!= cdk_function
)
9145 error ("declaration of %qD as non-function", dname
);
9146 return error_mark_node
;
9149 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9153 error ("declaration of %qD as %<typedef%>", dname
);
9154 return error_mark_node
;
9156 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9158 error ("declaration of %qD as parameter", dname
);
9159 return error_mark_node
;
9163 /* Anything declared one level down from the top level
9164 must be one of the parameters of a function
9165 (because the body is at least two levels down). */
9167 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9168 by not allowing C++ class definitions to specify their parameters
9169 with xdecls (must be spec.d in the parmlist).
9171 Since we now wait to push a class scope until we are sure that
9172 we are in a legitimate method context, we must set oldcname
9173 explicitly (since current_class_name is not yet alive).
9175 We also want to avoid calling this a PARM if it is in a namespace. */
9177 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9179 cp_binding_level
*b
= current_binding_level
;
9180 current_binding_level
= b
->level_chain
;
9181 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9182 decl_context
= PARM
;
9183 current_binding_level
= b
;
9187 name
= decl_context
== PARM
? "parameter" : "type name";
9189 if (constexpr_p
&& typedef_p
)
9191 error ("%<constexpr%> cannot appear in a typedef declaration");
9192 return error_mark_node
;
9195 /* If there were multiple types specified in the decl-specifier-seq,
9196 issue an error message. */
9197 if (declspecs
->multiple_types_p
)
9199 error ("two or more data types in declaration of %qs", name
);
9200 return error_mark_node
;
9203 if (declspecs
->conflicting_specifiers_p
)
9205 error ("conflicting specifiers in declaration of %qs", name
);
9206 return error_mark_node
;
9209 /* Extract the basic type from the decl-specifier-seq. */
9210 type
= declspecs
->type
;
9211 if (type
== error_mark_node
)
9214 type_was_error_mark_node
= true;
9216 /* If the entire declaration is itself tagged as deprecated then
9217 suppress reports of deprecated items. */
9218 if (type
&& TREE_DEPRECATED (type
)
9219 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9220 warn_deprecated_use (type
, NULL_TREE
);
9221 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9223 typedef_decl
= type
;
9224 type
= TREE_TYPE (typedef_decl
);
9225 if (TREE_DEPRECATED (type
)
9226 && DECL_ARTIFICIAL (typedef_decl
)
9227 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9228 warn_deprecated_use (type
, NULL_TREE
);
9230 /* No type at all: default to `int', and set DEFAULTED_INT
9231 because it was not a user-defined typedef. */
9232 if (type
== NULL_TREE
)
9234 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9236 /* These imply 'int'. */
9237 type
= integer_type_node
;
9240 /* If we just have "complex", it is equivalent to "complex double". */
9241 else if (!longlong
&& !explicit_intN
9242 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9244 type
= double_type_node
;
9245 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9246 "ISO C++ does not support plain %<complex%> meaning "
9247 "%<double complex%>");
9251 explicit_int
= declspecs
->explicit_int_p
;
9252 explicit_char
= declspecs
->explicit_char_p
;
9255 /* See the code below that used this. */
9257 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9259 typedef_type
= type
;
9262 if (sfk
!= sfk_conversion
)
9263 ctor_return_type
= ctype
;
9265 if (sfk
!= sfk_none
)
9266 type
= check_special_function_return_type (sfk
, type
,
9268 else if (type
== NULL_TREE
)
9274 /* We handle `main' specially here, because 'main () { }' is so
9275 common. With no options, it is allowed. With -Wreturn-type,
9276 it is a warning. It is only an error with -pedantic-errors. */
9277 is_main
= (funcdef_flag
9278 && dname
&& identifier_p (dname
)
9279 && MAIN_NAME_P (dname
)
9280 && ctype
== NULL_TREE
9281 && in_namespace
== NULL_TREE
9282 && current_namespace
== global_namespace
);
9284 if (type_was_error_mark_node
)
9285 /* We've already issued an error, don't complain more. */;
9286 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9287 /* Allow it, sigh. */;
9289 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9291 pedwarn (input_location
, OPT_Wpedantic
,
9292 "ISO C++ forbids declaration of %qs with no type", name
);
9294 warning (OPT_Wreturn_type
,
9295 "ISO C++ forbids declaration of %qs with no type", name
);
9297 type
= integer_type_node
;
9304 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9306 error ("%<__int%d%> is not supported by this target",
9307 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9308 explicit_intN
= false;
9310 else if (pedantic
&& ! in_system_header_at (input_location
))
9311 pedwarn (input_location
, OPT_Wpedantic
,
9312 "ISO C++ does not support %<__int%d%> for %qs",
9313 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9316 /* Now process the modifiers that were specified
9317 and check for invalid combinations. */
9319 /* Long double is a special combination. */
9320 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9323 type
= cp_build_qualified_type (long_double_type_node
,
9324 cp_type_quals (type
));
9327 /* Check all other uses of type modifiers. */
9329 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9333 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9334 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9335 else if (signed_p
&& unsigned_p
)
9336 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9337 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9338 error ("%<long long%> invalid for %qs", name
);
9339 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9340 error ("%<long%> invalid for %qs", name
);
9341 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9342 error ("%<short%> invalid for %qs", name
);
9343 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9344 error ("%<long%> or %<short%> invalid for %qs", name
);
9345 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9346 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9347 else if ((long_p
|| short_p
) && explicit_char
)
9348 error ("%<long%> or %<short%> specified with char for %qs", name
);
9349 else if (long_p
&& short_p
)
9350 error ("%<long%> and %<short%> specified together for %qs", name
);
9351 else if (type
== char16_type_node
|| type
== char32_type_node
)
9353 if (signed_p
|| unsigned_p
)
9354 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9355 else if (short_p
|| long_p
)
9356 error ("%<short%> or %<long%> invalid for %qs", name
);
9361 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9363 pedwarn (input_location
, OPT_Wpedantic
,
9364 "long, short, signed or unsigned used invalidly for %qs",
9366 if (flag_pedantic_errors
)
9371 /* Discard the type modifiers if they are invalid. */
9382 /* Decide whether an integer type is signed or not.
9383 Optionally treat bitfields as signed by default. */
9387 It is implementation-defined whether a plain (neither
9388 explicitly signed or unsigned) char, short, int, or long
9389 bit-field is signed or unsigned.
9391 Naturally, we extend this to long long as well. Note that
9392 this does not include wchar_t. */
9393 || (bitfield
&& !flag_signed_bitfields
9395 /* A typedef for plain `int' without `signed' can be
9396 controlled just like plain `int', but a typedef for
9397 `signed int' cannot be so controlled. */
9399 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9400 && TREE_CODE (type
) == INTEGER_TYPE
9401 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9404 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9406 type
= long_long_unsigned_type_node
;
9408 type
= long_unsigned_type_node
;
9410 type
= short_unsigned_type_node
;
9411 else if (type
== char_type_node
)
9412 type
= unsigned_char_type_node
;
9413 else if (typedef_decl
)
9414 type
= unsigned_type_for (type
);
9416 type
= unsigned_type_node
;
9418 else if (signed_p
&& type
== char_type_node
)
9419 type
= signed_char_type_node
;
9420 else if (explicit_intN
)
9421 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9423 type
= long_long_integer_type_node
;
9425 type
= long_integer_type_node
;
9427 type
= short_integer_type_node
;
9429 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9431 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9432 error ("complex invalid for %qs", name
);
9433 /* If a modifier is specified, the resulting complex is the complex
9434 form of TYPE. E.g, "complex short" is "complex short int". */
9435 else if (type
== integer_type_node
)
9436 type
= complex_integer_type_node
;
9437 else if (type
== float_type_node
)
9438 type
= complex_float_type_node
;
9439 else if (type
== double_type_node
)
9440 type
= complex_double_type_node
;
9441 else if (type
== long_double_type_node
)
9442 type
= complex_long_double_type_node
;
9444 type
= build_complex_type (type
);
9447 type_quals
= TYPE_UNQUALIFIED
;
9448 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9449 type_quals
|= TYPE_QUAL_CONST
;
9450 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9451 type_quals
|= TYPE_QUAL_VOLATILE
;
9452 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9453 type_quals
|= TYPE_QUAL_RESTRICT
;
9454 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9455 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9458 /* If we're using the injected-class-name to form a compound type or a
9459 declaration, replace it with the underlying class so we don't get
9460 redundant typedefs in the debug output. But if we are returning the
9461 type unchanged, leave it alone so that it's available to
9462 maybe_get_template_decl_from_type_decl. */
9463 if (CLASS_TYPE_P (type
)
9464 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9465 && type
== TREE_TYPE (TYPE_NAME (type
))
9466 && (declarator
|| type_quals
))
9467 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9469 type_quals
|= cp_type_quals (type
);
9470 type
= cp_build_qualified_type_real
9471 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9472 || declspecs
->decltype_p
)
9473 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9474 /* We might have ignored or rejected some of the qualifiers. */
9475 type_quals
= cp_type_quals (type
);
9478 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9479 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9480 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9482 storage_class
= declspecs
->storage_class
;
9483 if (storage_class
== sc_static
)
9484 staticp
= 1 + (decl_context
== FIELD
);
9486 if (virtualp
&& staticp
== 2)
9488 error ("member %qD cannot be declared both virtual and static", dname
);
9489 storage_class
= sc_none
;
9492 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9494 /* Issue errors about use of storage classes for parameters. */
9495 if (decl_context
== PARM
)
9499 error ("typedef declaration invalid in parameter declaration");
9500 return error_mark_node
;
9502 else if (template_parm_flag
&& storage_class
!= sc_none
)
9504 error ("storage class specified for template parameter %qs", name
);
9505 return error_mark_node
;
9507 else if (storage_class
== sc_static
9508 || storage_class
== sc_extern
9510 error ("storage class specifiers invalid in parameter declarations");
9512 /* Function parameters cannot be constexpr. If we saw one, moan
9513 and pretend it wasn't there. */
9516 error ("a parameter cannot be declared %<constexpr%>");
9521 /* Give error if `virtual' is used outside of class declaration. */
9523 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9525 error ("%<virtual%> outside class declaration");
9529 /* Static anonymous unions are dealt with here. */
9530 if (staticp
&& decl_context
== TYPENAME
9532 && ANON_AGGR_TYPE_P (declspecs
->type
))
9533 decl_context
= FIELD
;
9535 /* Warn about storage classes that are invalid for certain
9536 kinds of declarations (parameters, typenames, etc.). */
9539 && storage_class
!= sc_extern
9540 && storage_class
!= sc_static
)
9543 error ("multiple storage classes in declaration of %qs", name
);
9546 if (decl_context
!= NORMAL
9547 && ((storage_class
!= sc_none
9548 && storage_class
!= sc_mutable
)
9551 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9552 && (storage_class
== sc_register
9553 || storage_class
== sc_auto
))
9557 else if (decl_context
== FIELD
9558 /* C++ allows static class elements. */
9559 && storage_class
== sc_static
)
9560 /* C++ also allows inlines and signed and unsigned elements,
9561 but in those cases we don't come in here. */
9565 if (decl_context
== FIELD
)
9566 error ("storage class specified for %qs", name
);
9569 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9570 error ("storage class specified for parameter %qs", name
);
9572 error ("storage class specified for typename");
9574 if (storage_class
== sc_register
9575 || storage_class
== sc_auto
9576 || storage_class
== sc_extern
9578 storage_class
= sc_none
;
9581 else if (storage_class
== sc_extern
&& funcdef_flag
9582 && ! toplevel_bindings_p ())
9583 error ("nested function %qs declared %<extern%>", name
);
9584 else if (toplevel_bindings_p ())
9586 if (storage_class
== sc_auto
)
9587 error ("top-level declaration of %qs specifies %<auto%>", name
);
9590 && storage_class
!= sc_extern
9591 && storage_class
!= sc_static
)
9593 if (declspecs
->gnu_thread_keyword_p
)
9594 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9595 "declared %<__thread%>", name
);
9597 /* When thread_local is applied to a variable of block scope the
9598 storage-class-specifier static is implied if it does not appear
9600 storage_class
= declspecs
->storage_class
= sc_static
;
9604 if (storage_class
&& friendp
)
9606 error ("storage class specifiers invalid in friend function declarations");
9607 storage_class
= sc_none
;
9612 unqualified_id
= NULL_TREE
;
9615 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9616 switch (TREE_CODE (unqualified_id
))
9619 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9620 if (TYPE_P (unqualified_id
))
9621 unqualified_id
= constructor_name (unqualified_id
);
9624 case IDENTIFIER_NODE
:
9625 case TEMPLATE_ID_EXPR
:
9633 if (declspecs
->std_attributes
)
9635 /* Apply the c++11 attributes to the type preceding them. */
9636 input_location
= declspecs
->locations
[ds_std_attribute
];
9637 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9638 input_location
= saved_loc
;
9641 /* Determine the type of the entity declared by recurring on the
9643 for (; declarator
; declarator
= declarator
->declarator
)
9645 const cp_declarator
*inner_declarator
;
9648 if (type
== error_mark_node
)
9649 return error_mark_node
;
9651 attrs
= declarator
->attributes
;
9657 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9658 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9659 if (declarator
->kind
== cdk_function
)
9660 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9661 if (declarator
->kind
== cdk_array
)
9662 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9663 returned_attrs
= decl_attributes (&type
,
9664 chainon (returned_attrs
, attrs
),
9668 if (declarator
->kind
== cdk_id
)
9671 inner_declarator
= declarator
->declarator
;
9673 switch (declarator
->kind
)
9676 type
= create_array_type_for_decl (dname
, type
,
9677 declarator
->u
.array
.bounds
);
9678 if (declarator
->std_attributes
)
9681 The optional attribute-specifier-seq appertains to the
9683 returned_attrs
= chainon (returned_attrs
,
9684 declarator
->std_attributes
);
9692 /* Declaring a function type.
9693 Make sure we have a valid type for the function to return. */
9695 if (type_quals
!= TYPE_UNQUALIFIED
)
9697 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9698 warning (OPT_Wignored_qualifiers
,
9699 "type qualifiers ignored on function return type");
9700 /* We now know that the TYPE_QUALS don't apply to the
9701 decl, but to its return type. */
9702 type_quals
= TYPE_UNQUALIFIED
;
9704 errmsg
= targetm
.invalid_return_type (type
);
9708 type
= integer_type_node
;
9711 /* Error about some types functions can't return. */
9713 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9715 error ("%qs declared as function returning a function", name
);
9716 return error_mark_node
;
9718 if (TREE_CODE (type
) == ARRAY_TYPE
)
9720 error ("%qs declared as function returning an array", name
);
9721 return error_mark_node
;
9724 input_location
= declspecs
->locations
[ds_type_spec
];
9725 abstract_virtuals_error (ACU_RETURN
, type
);
9726 input_location
= saved_loc
;
9728 /* Pick up type qualifiers which should be applied to `this'. */
9729 memfn_quals
= declarator
->u
.function
.qualifiers
;
9730 /* Pick up virt-specifiers. */
9731 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9732 /* And ref-qualifier, too */
9733 rqual
= declarator
->u
.function
.ref_qualifier
;
9734 /* Pick up the exception specifications. */
9735 raises
= declarator
->u
.function
.exception_specification
;
9736 /* If the exception-specification is ill-formed, let's pretend
9737 there wasn't one. */
9738 if (raises
== error_mark_node
)
9741 /* Say it's a definition only for the CALL_EXPR
9742 closest to the identifier. */
9743 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9745 /* Handle a late-specified return type. */
9748 if (type_uses_auto (type
))
9750 if (!declarator
->u
.function
.late_return_type
)
9752 if (current_class_type
9753 && LAMBDA_TYPE_P (current_class_type
))
9754 /* OK for C++11 lambdas. */;
9755 else if (cxx_dialect
< cxx14
)
9757 error ("%qs function uses "
9758 "%<auto%> type specifier without trailing "
9759 "return type", name
);
9760 inform (input_location
, "deduced return type "
9761 "only available with -std=c++14 or "
9766 error ("virtual function cannot "
9767 "have deduced return type");
9771 else if (!is_auto (type
))
9773 error ("%qs function with trailing return type has"
9774 " %qT as its type rather than plain %<auto%>",
9776 return error_mark_node
;
9779 else if (declarator
->u
.function
.late_return_type
)
9781 if (cxx_dialect
< cxx11
)
9782 /* Not using maybe_warn_cpp0x because this should
9783 always be an error. */
9784 error ("trailing return type only available with "
9785 "-std=c++11 or -std=gnu++11");
9787 error ("%qs function with trailing return type not "
9788 "declared with %<auto%> type specifier", name
);
9789 return error_mark_node
;
9792 type
= splice_late_return_type
9793 (type
, declarator
->u
.function
.late_return_type
);
9794 if (type
== error_mark_node
)
9795 return error_mark_node
;
9797 if (declarator
->u
.function
.late_return_type
)
9798 late_return_type_p
= true;
9800 if (ctype
== NULL_TREE
9801 && decl_context
== FIELD
9804 ctype
= current_class_type
;
9806 if (ctype
&& (sfk
== sfk_constructor
9807 || sfk
== sfk_destructor
))
9809 /* We are within a class's scope. If our declarator name
9810 is the same as the class name, and we are defining
9811 a function, then it is a constructor/destructor, and
9812 therefore returns a void type. */
9814 /* ISO C++ 12.4/2. A destructor may not be declared
9815 const or volatile. A destructor may not be static.
9816 A destructor may not be declared with ref-qualifier.
9818 ISO C++ 12.1. A constructor may not be declared
9819 const or volatile. A constructor may not be
9820 virtual. A constructor may not be static.
9821 A constructor may not be declared with ref-qualifier. */
9823 error ((flags
== DTOR_FLAG
)
9824 ? G_("destructor cannot be static member function")
9825 : G_("constructor cannot be static member function"));
9828 error ((flags
== DTOR_FLAG
)
9829 ? G_("destructors may not be cv-qualified")
9830 : G_("constructors may not be cv-qualified"));
9831 memfn_quals
= TYPE_UNQUALIFIED
;
9836 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9837 error ((flags
== DTOR_FLAG
)
9838 ? "destructors may not be ref-qualified"
9839 : "constructors may not be ref-qualified");
9840 rqual
= REF_QUAL_NONE
;
9843 if (decl_context
== FIELD
9844 && !member_function_or_else (ctype
,
9847 return error_mark_node
;
9849 if (flags
!= DTOR_FLAG
)
9851 /* It's a constructor. */
9856 permerror (input_location
, "constructors cannot be declared virtual");
9859 if (decl_context
== FIELD
9860 && sfk
!= sfk_constructor
)
9861 return error_mark_node
;
9863 if (decl_context
== FIELD
)
9870 /* Cannot be both friend and virtual. */
9871 error ("virtual functions cannot be friends");
9874 if (decl_context
== NORMAL
)
9875 error ("friend declaration not in class definition");
9876 if (current_function_decl
&& funcdef_flag
)
9877 error ("can%'t define friend function %qs in a local "
9881 else if (ctype
&& sfk
== sfk_conversion
)
9885 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9890 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9893 if (inner_declarator
9894 && inner_declarator
->kind
== cdk_id
9895 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9896 && arg_types
!= void_list_node
)
9898 error ("destructors may not have parameters");
9899 arg_types
= void_list_node
;
9903 type
= build_function_type (type
, arg_types
);
9904 if (declarator
->std_attributes
)
9907 The optional attribute-specifier-seq appertains to
9908 the function type. */
9909 decl_attributes (&type
, declarator
->std_attributes
,
9917 /* Filter out pointers-to-references and references-to-references.
9918 We can get these if a TYPE_DECL is used. */
9920 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9922 if (declarator
->kind
!= cdk_reference
)
9924 error ("cannot declare pointer to %q#T", type
);
9925 type
= TREE_TYPE (type
);
9928 /* In C++0x, we allow reference to reference declarations
9929 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9930 and template type arguments [14.3.1/4 temp.arg.type]. The
9931 check for direct reference to reference declarations, which
9932 are still forbidden, occurs below. Reasoning behind the change
9933 can be found in DR106, DR540, and the rvalue reference
9935 else if (cxx_dialect
== cxx98
)
9937 error ("cannot declare reference to %q#T", type
);
9938 type
= TREE_TYPE (type
);
9941 else if (VOID_TYPE_P (type
))
9943 if (declarator
->kind
== cdk_reference
)
9944 error ("cannot declare reference to %q#T", type
);
9945 else if (declarator
->kind
== cdk_ptrmem
)
9946 error ("cannot declare pointer to %q#T member", type
);
9949 /* We now know that the TYPE_QUALS don't apply to the decl,
9950 but to the target of the pointer. */
9951 type_quals
= TYPE_UNQUALIFIED
;
9953 /* This code used to handle METHOD_TYPE, but I don't think it's
9954 possible to get it here anymore. */
9955 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9956 if (declarator
->kind
== cdk_ptrmem
9957 && TREE_CODE (type
) == FUNCTION_TYPE
)
9959 memfn_quals
|= type_memfn_quals (type
);
9960 type
= build_memfn_type (type
,
9961 declarator
->u
.pointer
.class_type
,
9964 if (type
== error_mark_node
)
9965 return error_mark_node
;
9967 rqual
= REF_QUAL_NONE
;
9968 memfn_quals
= TYPE_UNQUALIFIED
;
9971 if (TREE_CODE (type
) == FUNCTION_TYPE
9972 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9973 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9974 error (declarator
->kind
== cdk_reference
9975 ? G_("cannot declare reference to qualified function type %qT")
9976 : G_("cannot declare pointer to qualified function type %qT"),
9979 /* When the pointed-to type involves components of variable size,
9980 care must be taken to ensure that the size evaluation code is
9981 emitted early enough to dominate all the possible later uses
9982 and late enough for the variables on which it depends to have
9985 This is expected to happen automatically when the pointed-to
9986 type has a name/declaration of it's own, but special attention
9987 is required if the type is anonymous.
9989 We handle the NORMAL and FIELD contexts here by inserting a
9990 dummy statement that just evaluates the size at a safe point
9991 and ensures it is not deferred until e.g. within a deeper
9992 conditional context (c++/43555).
9994 We expect nothing to be needed here for PARM or TYPENAME.
9995 Evaluating the size at this point for TYPENAME would
9996 actually be incorrect, as we might be in the middle of an
9997 expression with side effects on the pointed-to type size
9998 "arguments" prior to the pointer declaration point and the
9999 size evaluation could end up prior to the side effects. */
10001 if (!TYPE_NAME (type
)
10002 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10003 && at_function_scope_p ()
10004 && variably_modified_type_p (type
, NULL_TREE
))
10005 /* Force evaluation of the SAVE_EXPR. */
10006 finish_expr_stmt (TYPE_SIZE (type
));
10008 if (declarator
->kind
== cdk_reference
)
10010 /* In C++0x, the type we are creating a reference to might be
10011 a typedef which is itself a reference type. In that case,
10012 we follow the reference collapsing rules in
10013 [7.1.3/8 dcl.typedef] to create the final reference type:
10015 "If a typedef TD names a type that is a reference to a type
10016 T, an attempt to create the type 'lvalue reference to cv TD'
10017 creates the type 'lvalue reference to T,' while an attempt
10018 to create the type "rvalue reference to cv TD' creates the
10021 if (VOID_TYPE_P (type
))
10022 /* We already gave an error. */;
10023 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10025 if (declarator
->u
.reference
.rvalue_ref
)
10026 /* Leave type alone. */;
10028 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10031 type
= cp_build_reference_type
10032 (type
, declarator
->u
.reference
.rvalue_ref
);
10034 /* In C++0x, we need this check for direct reference to
10035 reference declarations, which are forbidden by
10036 [8.3.2/5 dcl.ref]. Reference to reference declarations
10037 are only allowed indirectly through typedefs and template
10038 type arguments. Example:
10040 void foo(int & &); // invalid ref-to-ref decl
10042 typedef int & int_ref;
10043 void foo(int_ref &); // valid ref-to-ref decl
10045 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10046 error ("cannot declare reference to %q#T, which is not "
10047 "a typedef or a template type argument", type
);
10049 else if (TREE_CODE (type
) == METHOD_TYPE
)
10050 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10051 else if (declarator
->kind
== cdk_ptrmem
)
10053 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10054 != NAMESPACE_DECL
);
10055 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10056 /* We will already have complained. */
10057 type
= error_mark_node
;
10059 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10063 type
= build_pointer_type (type
);
10065 /* Process a list of type modifier keywords (such as
10066 const or volatile) that were given inside the `*' or `&'. */
10068 if (declarator
->u
.pointer
.qualifiers
)
10071 = cp_build_qualified_type (type
,
10072 declarator
->u
.pointer
.qualifiers
);
10073 type_quals
= cp_type_quals (type
);
10076 /* Apply C++11 attributes to the pointer, and not to the
10077 type pointed to. This is unlike what is done for GNU
10078 attributes above. It is to comply with [dcl.ptr]/1:
10080 [the optional attribute-specifier-seq (7.6.1) appertains
10081 to the pointer and not to the object pointed to]. */
10082 if (declarator
->std_attributes
)
10083 decl_attributes (&type
, declarator
->std_attributes
,
10093 gcc_unreachable ();
10097 /* A `constexpr' specifier used in an object declaration declares
10098 the object as `const'. */
10099 if (constexpr_p
&& innermost_code
!= cdk_function
)
10101 if (type_quals
& TYPE_QUAL_VOLATILE
)
10102 error ("both %<volatile%> and %<constexpr%> cannot be used here");
10103 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10105 type_quals
|= TYPE_QUAL_CONST
;
10106 type
= cp_build_qualified_type (type
, type_quals
);
10110 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10111 && TREE_CODE (type
) != FUNCTION_TYPE
10112 && TREE_CODE (type
) != METHOD_TYPE
10113 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10115 error ("template-id %qD used as a declarator",
10117 unqualified_id
= dname
;
10120 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10121 qualified with a class-name, turn it into a METHOD_TYPE, unless
10122 we know that the function is static. We take advantage of this
10123 opportunity to do other processing that pertains to entities
10124 explicitly declared to be class members. Note that if DECLARATOR
10125 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10126 would not have exited the loop above. */
10128 && declarator
->u
.id
.qualifying_scope
10129 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10131 ctype
= declarator
->u
.id
.qualifying_scope
;
10132 ctype
= TYPE_MAIN_VARIANT (ctype
);
10133 template_count
= num_template_headers_for_class (ctype
);
10135 if (ctype
== current_class_type
)
10139 permerror (input_location
, "member functions are implicitly friends of their class");
10143 permerror (declarator
->id_loc
,
10144 "extra qualification %<%T::%> on member %qs",
10147 else if (/* If the qualifying type is already complete, then we
10148 can skip the following checks. */
10149 !COMPLETE_TYPE_P (ctype
)
10150 && (/* If the function is being defined, then
10151 qualifying type must certainly be complete. */
10153 /* A friend declaration of "T::f" is OK, even if
10154 "T" is a template parameter. But, if this
10155 function is not a friend, the qualifying type
10156 must be a class. */
10157 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10158 /* For a declaration, the type need not be
10159 complete, if either it is dependent (since there
10160 is no meaningful definition of complete in that
10161 case) or the qualifying class is currently being
10163 || !(dependent_type_p (ctype
)
10164 || currently_open_class (ctype
)))
10165 /* Check that the qualifying type is complete. */
10166 && !complete_type_or_else (ctype
, NULL_TREE
))
10167 return error_mark_node
;
10168 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10170 if (current_class_type
10171 && (!friendp
|| funcdef_flag
))
10173 error (funcdef_flag
10174 ? G_("cannot define member function %<%T::%s%> "
10176 : G_("cannot declare member function %<%T::%s%> "
10178 ctype
, name
, current_class_type
);
10179 return error_mark_node
;
10182 else if (typedef_p
&& current_class_type
)
10184 error ("cannot declare member %<%T::%s%> within %qT",
10185 ctype
, name
, current_class_type
);
10186 return error_mark_node
;
10190 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10191 ctype
= current_class_type
;
10193 /* Now TYPE has the actual type. */
10195 if (returned_attrs
)
10198 *attrlist
= chainon (returned_attrs
, *attrlist
);
10200 attrlist
= &returned_attrs
;
10204 && declarator
->kind
== cdk_id
10205 && declarator
->std_attributes
)
10206 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10207 a declarator-id appertains to the entity that is declared. */
10208 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10210 /* Handle parameter packs. */
10211 if (parameter_pack_p
)
10213 if (decl_context
== PARM
)
10214 /* Turn the type into a pack expansion.*/
10215 type
= make_pack_expansion (type
);
10217 error ("non-parameter %qs cannot be a parameter pack", name
);
10220 /* Did array size calculations overflow or does the array cover more
10221 than half of the address-space? */
10222 if (TREE_CODE (type
) == ARRAY_TYPE
10223 && COMPLETE_TYPE_P (type
)
10224 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10225 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10227 error ("size of array %qs is too large", name
);
10228 /* If we proceed with the array type as it is, we'll eventually
10229 crash in tree_to_[su]hwi(). */
10230 type
= error_mark_node
;
10233 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10234 && !processing_template_decl
10235 && variably_modified_type_p (type
, NULL_TREE
))
10237 if (decl_context
== FIELD
)
10238 error ("data member may not have variably modified type %qT", type
);
10240 error ("parameter may not have variably modified type %qT", type
);
10241 type
= error_mark_node
;
10244 if (explicitp
== 1 || (explicitp
&& friendp
))
10246 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10247 in the declaration of a constructor or conversion function within
10248 a class definition. */
10249 if (!current_class_type
)
10250 error ("%<explicit%> outside class declaration");
10252 error ("%<explicit%> in friend declaration");
10254 error ("only declarations of constructors and conversion operators "
10255 "can be %<explicit%>");
10259 if (storage_class
== sc_mutable
)
10261 if (decl_context
!= FIELD
|| friendp
)
10263 error ("non-member %qs cannot be declared %<mutable%>", name
);
10264 storage_class
= sc_none
;
10266 else if (decl_context
== TYPENAME
|| typedef_p
)
10268 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10269 storage_class
= sc_none
;
10271 else if (TREE_CODE (type
) == FUNCTION_TYPE
10272 || TREE_CODE (type
) == METHOD_TYPE
)
10274 error ("function %qs cannot be declared %<mutable%>", name
);
10275 storage_class
= sc_none
;
10279 error ("static %qs cannot be declared %<mutable%>", name
);
10280 storage_class
= sc_none
;
10282 else if (type_quals
& TYPE_QUAL_CONST
)
10284 error ("const %qs cannot be declared %<mutable%>", name
);
10285 storage_class
= sc_none
;
10287 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10289 permerror (input_location
, "reference %qs cannot be declared "
10290 "%<mutable%>", name
);
10291 storage_class
= sc_none
;
10295 /* If this is declaring a typedef name, return a TYPE_DECL. */
10296 if (typedef_p
&& decl_context
!= TYPENAME
)
10300 /* Note that the grammar rejects storage classes
10301 in typenames, fields or parameters. */
10302 if (current_lang_name
== lang_name_java
)
10303 TYPE_FOR_JAVA (type
) = 1;
10305 /* This declaration:
10307 typedef void f(int) const;
10309 declares a function type which is not a member of any
10310 particular class, but which is cv-qualified; for
10311 example "f S::*" declares a pointer to a const-qualified
10312 member function of S. We record the cv-qualification in the
10314 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10316 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10318 /* We have now dealt with these qualifiers. */
10319 memfn_quals
= TYPE_UNQUALIFIED
;
10320 rqual
= REF_QUAL_NONE
;
10323 if (type_uses_auto (type
))
10325 error ("typedef declared %<auto%>");
10326 type
= error_mark_node
;
10329 if (decl_context
== FIELD
)
10330 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10332 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10333 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10334 error_at (DECL_SOURCE_LOCATION (decl
),
10335 "typedef name may not be a nested-name-specifier");
10336 TREE_TYPE (decl
) = error_mark_node
;
10339 if (decl_context
!= FIELD
)
10341 if (!current_function_decl
)
10342 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10343 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10344 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10345 (current_function_decl
)))
10346 /* The TYPE_DECL is "abstract" because there will be
10347 clones of this constructor/destructor, and there will
10348 be copies of this TYPE_DECL generated in those
10349 clones. The decloning optimization (for space) may
10350 revert this subsequently if it determines that
10351 the clones should share a common implementation. */
10352 DECL_ABSTRACT_P (decl
) = true;
10354 else if (current_class_type
10355 && constructor_name_p (unqualified_id
, current_class_type
))
10356 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10357 "as enclosing class",
10360 /* If the user declares "typedef struct {...} foo" then the
10361 struct will have an anonymous name. Fill that name in now.
10362 Nothing can refer to it, so nothing needs know about the name
10364 if (type
!= error_mark_node
10366 && TYPE_NAME (type
)
10367 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10368 && TYPE_ANONYMOUS_P (type
)
10369 && declspecs
->type_definition_p
10370 && attributes_naming_typedef_ok (*attrlist
)
10371 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10375 /* Replace the anonymous name with the real name everywhere. */
10376 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10378 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10379 /* We do not rename the debug info representing the
10380 anonymous tagged type because the standard says in
10381 [dcl.typedef] that the naming applies only for
10382 linkage purposes. */
10383 /*debug_hooks->set_name (t, decl);*/
10384 TYPE_NAME (t
) = decl
;
10387 if (TYPE_LANG_SPECIFIC (type
))
10388 TYPE_WAS_ANONYMOUS (type
) = 1;
10390 /* If this is a typedef within a template class, the nested
10391 type is a (non-primary) template. The name for the
10392 template needs updating as well. */
10393 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10394 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10395 = TYPE_IDENTIFIER (type
);
10397 /* Adjust linkage now that we aren't anonymous anymore. */
10398 reset_type_linkage (type
);
10400 /* FIXME remangle member functions; member functions of a
10401 type with external linkage have external linkage. */
10405 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10406 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10408 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10409 memfn_quals
!= TYPE_UNQUALIFIED
,
10410 inlinep
, friendp
, raises
!= NULL_TREE
);
10412 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10413 /* Acknowledge that this was written:
10414 `using analias = atype;'. */
10415 TYPE_DECL_ALIAS_P (decl
) = 1;
10420 /* Detect the case of an array type of unspecified size
10421 which came, as such, direct from a typedef name.
10422 We must copy the type, so that the array's domain can be
10423 individually set by the object's initializer. */
10425 if (type
&& typedef_type
10426 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10427 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10428 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10430 /* Detect where we're using a typedef of function type to declare a
10431 function. PARMS will not be set, so we must create it now. */
10433 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10435 tree decls
= NULL_TREE
;
10438 for (args
= TYPE_ARG_TYPES (type
);
10439 args
&& args
!= void_list_node
;
10440 args
= TREE_CHAIN (args
))
10442 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10444 DECL_CHAIN (decl
) = decls
;
10448 parms
= nreverse (decls
);
10450 if (decl_context
!= TYPENAME
)
10452 /* The qualifiers on the function type become the qualifiers on
10453 the non-static member function. */
10454 memfn_quals
|= type_memfn_quals (type
);
10455 rqual
= type_memfn_rqual (type
);
10456 type_quals
= TYPE_UNQUALIFIED
;
10460 /* If this is a type name (such as, in a cast or sizeof),
10461 compute the type and return it now. */
10463 if (decl_context
== TYPENAME
)
10465 /* Note that the grammar rejects storage classes
10466 in typenames, fields or parameters. */
10467 if (type_quals
!= TYPE_UNQUALIFIED
)
10468 type_quals
= TYPE_UNQUALIFIED
;
10470 /* Special case: "friend class foo" looks like a TYPENAME context. */
10473 if (type_quals
!= TYPE_UNQUALIFIED
)
10475 error ("type qualifiers specified for friend class declaration");
10476 type_quals
= TYPE_UNQUALIFIED
;
10480 error ("%<inline%> specified for friend class declaration");
10486 /* Don't allow friend declaration without a class-key. */
10487 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10488 permerror (input_location
, "template parameters cannot be friends");
10489 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10490 permerror (input_location
, "friend declaration requires class-key, "
10491 "i.e. %<friend class %T::%D%>",
10492 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10494 permerror (input_location
, "friend declaration requires class-key, "
10495 "i.e. %<friend %#T%>",
10499 /* Only try to do this stuff if we didn't already give up. */
10500 if (type
!= integer_type_node
)
10502 /* A friendly class? */
10503 if (current_class_type
)
10504 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10505 /*complain=*/true);
10507 error ("trying to make class %qT a friend of global scope",
10510 type
= void_type_node
;
10513 else if (memfn_quals
|| rqual
)
10515 if (ctype
== NULL_TREE
10516 && TREE_CODE (type
) == METHOD_TYPE
)
10517 ctype
= TYPE_METHOD_BASETYPE (type
);
10520 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10521 /* Core issue #547: need to allow this in template type args.
10522 Allow it in general in C++11 for alias-declarations. */
10523 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10524 && TREE_CODE (type
) == FUNCTION_TYPE
)
10525 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10527 error ("invalid qualifiers on non-member function type");
10532 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10533 && decl_context
!= CATCHPARM
10534 && TREE_CODE (type
) != UNION_TYPE
10537 error ("abstract declarator %qT used as declaration", type
);
10538 return error_mark_node
;
10541 /* Only functions may be declared using an operator-function-id. */
10543 && IDENTIFIER_OPNAME_P (unqualified_id
)
10544 && TREE_CODE (type
) != FUNCTION_TYPE
10545 && TREE_CODE (type
) != METHOD_TYPE
)
10547 error ("declaration of %qD as non-function", unqualified_id
);
10548 return error_mark_node
;
10551 /* We don't check parameter types here because we can emit a better
10552 error message later. */
10553 if (decl_context
!= PARM
)
10555 type
= check_var_type (unqualified_id
, type
);
10556 if (type
== error_mark_node
)
10557 return error_mark_node
;
10560 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10561 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10563 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10565 if (ctype
|| in_namespace
)
10566 error ("cannot use %<::%> in parameter declaration");
10568 if (type_uses_auto (type
))
10570 if (cxx_dialect
>= cxx14
)
10571 error ("%<auto%> parameter not permitted in this context");
10573 error ("parameter declared %<auto%>");
10574 type
= error_mark_node
;
10577 /* A parameter declared as an array of T is really a pointer to T.
10578 One declared as a function is really a pointer to a function.
10579 One declared as a member is really a pointer to member. */
10581 if (TREE_CODE (type
) == ARRAY_TYPE
)
10583 /* Transfer const-ness of array into that of type pointed to. */
10584 type
= build_pointer_type (TREE_TYPE (type
));
10585 type_quals
= TYPE_UNQUALIFIED
;
10586 array_parameter_p
= true;
10588 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10589 type
= build_pointer_type (type
);
10592 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10593 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10595 cp_cv_quals real_quals
= memfn_quals
;
10596 if (cxx_dialect
< cxx14
&& constexpr_p
10597 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10598 real_quals
|= TYPE_QUAL_CONST
;
10599 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10605 if (decl_context
== PARM
)
10607 decl
= cp_build_parm_decl (unqualified_id
, type
);
10608 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10610 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10611 memfn_quals
!= TYPE_UNQUALIFIED
,
10612 inlinep
, friendp
, raises
!= NULL_TREE
);
10614 else if (decl_context
== FIELD
)
10616 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10617 && type_uses_auto (type
))
10619 error ("non-static data member declared %<auto%>");
10620 type
= error_mark_node
;
10623 /* The C99 flexible array extension. */
10624 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10625 && TYPE_DOMAIN (type
) == NULL_TREE
)
10627 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10628 tf_warning_or_error
);
10629 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10632 if (type
== error_mark_node
)
10634 /* Happens when declaring arrays of sizes which
10635 are error_mark_node, for example. */
10638 else if (in_namespace
&& !friendp
)
10640 /* Something like struct S { int N::j; }; */
10641 error ("invalid use of %<::%>");
10642 return error_mark_node
;
10644 else if (TREE_CODE (type
) == FUNCTION_TYPE
10645 || TREE_CODE (type
) == METHOD_TYPE
)
10648 tree function_context
;
10652 /* This should never happen in pure C++ (the check
10653 could be an assert). It could happen in
10654 Objective-C++ if someone writes invalid code that
10655 uses a function declaration for an instance
10656 variable or property (instance variables and
10657 properties are parsed as FIELD_DECLs, but they are
10658 part of an Objective-C class, not a C++ class).
10659 That code is invalid and is caught by this
10663 error ("declaration of function %qD in invalid context",
10665 return error_mark_node
;
10668 /* ``A union may [ ... ] not [ have ] virtual functions.''
10670 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10672 error ("function %qD declared virtual inside a union",
10674 return error_mark_node
;
10677 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10681 error ("%qD cannot be declared virtual, since it "
10682 "is always static",
10689 /* Check that the name used for a destructor makes sense. */
10690 if (sfk
== sfk_destructor
)
10692 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10696 gcc_assert (friendp
);
10697 error ("expected qualified name in friend declaration "
10698 "for destructor %qD", uqname
);
10699 return error_mark_node
;
10702 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10704 error ("declaration of %qD as member of %qT",
10706 return error_mark_node
;
10710 error ("a destructor cannot be %<constexpr%>");
10711 return error_mark_node
;
10714 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10716 error ("expected qualified name in friend declaration "
10717 "for constructor %qD",
10718 id_declarator
->u
.id
.unqualified_name
);
10719 return error_mark_node
;
10722 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10724 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10725 if (variable_template_p (tmpl
))
10727 error ("specialization of variable template %qD "
10728 "declared as function", tmpl
);
10729 inform (DECL_SOURCE_LOCATION (tmpl
),
10730 "variable template declared here");
10731 return error_mark_node
;
10735 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10736 function_context
= (ctype
!= NULL_TREE
) ?
10737 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10738 publicp
= (! friendp
|| ! staticp
)
10739 && function_context
== NULL_TREE
;
10741 if (late_return_type_p
)
10742 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10744 decl
= grokfndecl (ctype
, type
,
10745 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10746 ? unqualified_id
: dname
,
10749 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10750 friendp
? -1 : 0, friendp
, publicp
,
10751 inlinep
| (2 * constexpr_p
),
10752 initialized
== SD_DELETED
, sfk
,
10753 funcdef_flag
, template_count
, in_namespace
,
10754 attrlist
, declarator
->id_loc
);
10755 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10756 if (decl
== NULL_TREE
)
10757 return error_mark_node
;
10759 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10760 /* The decl and setting of decl_attr is also turned off. */
10761 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10764 /* [class.conv.ctor]
10766 A constructor declared without the function-specifier
10767 explicit that can be called with a single parameter
10768 specifies a conversion from the type of its first
10769 parameter to the type of its class. Such a constructor
10770 is called a converting constructor. */
10771 if (explicitp
== 2)
10772 DECL_NONCONVERTING_P (decl
) = 1;
10774 else if (!staticp
&& !dependent_type_p (type
)
10775 && !COMPLETE_TYPE_P (complete_type (type
))
10776 && (TREE_CODE (type
) != ARRAY_TYPE
10777 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10778 || initialized
== 0))
10780 if (unqualified_id
)
10782 error ("field %qD has incomplete type %qT",
10783 unqualified_id
, type
);
10784 cxx_incomplete_type_inform (strip_array_types (type
));
10787 error ("name %qT has incomplete type", type
);
10789 type
= error_mark_node
;
10796 error ("%qE is neither function nor member function; "
10797 "cannot be declared friend", unqualified_id
);
10805 /* Friends are treated specially. */
10806 if (ctype
== current_class_type
)
10807 ; /* We already issued a permerror. */
10808 else if (decl
&& DECL_NAME (decl
))
10810 if (template_class_depth (current_class_type
) == 0)
10812 decl
= check_explicit_specialization
10813 (unqualified_id
, decl
, template_count
,
10814 2 * funcdef_flag
+ 4);
10815 if (decl
== error_mark_node
)
10816 return error_mark_node
;
10819 decl
= do_friend (ctype
, unqualified_id
, decl
,
10825 return error_mark_node
;
10828 /* Structure field. It may not be a function, except for C++. */
10830 if (decl
== NULL_TREE
)
10834 /* C++ allows static class members. All other work
10835 for this is done by grokfield. */
10836 decl
= build_lang_decl_loc (declarator
10837 ? declarator
->id_loc
10839 VAR_DECL
, unqualified_id
, type
);
10840 set_linkage_for_static_data_member (decl
);
10841 /* Even if there is an in-class initialization, DECL
10842 is considered undefined until an out-of-class
10843 definition is provided. */
10844 DECL_EXTERNAL (decl
) = 1;
10848 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10849 if (declspecs
->gnu_thread_keyword_p
)
10850 DECL_GNU_TLS_P (decl
) = true;
10853 if (constexpr_p
&& !initialized
)
10855 error ("constexpr static data member %qD must have an "
10856 "initializer", decl
);
10857 constexpr_p
= false;
10864 error ("non-static data member %qE declared %<constexpr%>",
10866 constexpr_p
= false;
10868 decl
= build_decl (input_location
,
10869 FIELD_DECL
, unqualified_id
, type
);
10870 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10871 if (bitfield
&& !unqualified_id
)
10872 TREE_NO_WARNING (decl
) = 1;
10874 if (storage_class
== sc_mutable
)
10876 DECL_MUTABLE_P (decl
) = 1;
10877 storage_class
= sc_none
;
10882 /* An attempt is being made to initialize a non-static
10883 member. This is new in C++11. */
10884 maybe_warn_cpp0x (CPP0X_NSDMI
);
10886 /* If this has been parsed with static storage class, but
10887 errors forced staticp to be cleared, ensure NSDMI is
10889 if (declspecs
->storage_class
== sc_static
)
10890 DECL_INITIAL (decl
) = error_mark_node
;
10894 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10895 memfn_quals
!= TYPE_UNQUALIFIED
,
10896 inlinep
, friendp
, raises
!= NULL_TREE
);
10899 else if (TREE_CODE (type
) == FUNCTION_TYPE
10900 || TREE_CODE (type
) == METHOD_TYPE
)
10902 tree original_name
;
10905 if (!unqualified_id
)
10906 return error_mark_node
;
10908 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10909 original_name
= dname
;
10911 original_name
= unqualified_id
;
10913 if (storage_class
== sc_auto
)
10914 error ("storage class %<auto%> invalid for function %qs", name
);
10915 else if (storage_class
== sc_register
)
10916 error ("storage class %<register%> invalid for function %qs", name
);
10919 if (declspecs
->gnu_thread_keyword_p
)
10920 error ("storage class %<__thread%> invalid for function %qs",
10923 error ("storage class %<thread_local%> invalid for function %qs",
10927 if (virt_specifiers
)
10928 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10929 /* Function declaration not at top level.
10930 Storage classes other than `extern' are not allowed
10931 and `extern' makes no difference. */
10932 if (! toplevel_bindings_p ()
10933 && (storage_class
== sc_static
10934 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10937 if (storage_class
== sc_static
)
10938 pedwarn (input_location
, OPT_Wpedantic
,
10939 "%<static%> specified invalid for function %qs "
10940 "declared out of global scope", name
);
10942 pedwarn (input_location
, OPT_Wpedantic
,
10943 "%<inline%> specifier invalid for function %qs "
10944 "declared out of global scope", name
);
10947 if (ctype
== NULL_TREE
)
10951 error ("virtual non-class function %qs", name
);
10954 else if (sfk
== sfk_constructor
10955 || sfk
== sfk_destructor
)
10957 error (funcdef_flag
10958 ? G_("%qs defined in a non-class scope")
10959 : G_("%qs declared in a non-class scope"), name
);
10964 /* Record whether the function is public. */
10965 publicp
= (ctype
!= NULL_TREE
10966 || storage_class
!= sc_static
);
10968 if (late_return_type_p
)
10969 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10971 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10972 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10974 publicp
, inlinep
| (2 * constexpr_p
),
10975 initialized
== SD_DELETED
, sfk
,
10977 template_count
, in_namespace
, attrlist
,
10978 declarator
->id_loc
);
10979 if (decl
== NULL_TREE
)
10980 return error_mark_node
;
10984 int invalid_static
= 0;
10986 /* Don't allow a static member function in a class, and forbid
10987 declaring main to be static. */
10988 if (TREE_CODE (type
) == METHOD_TYPE
)
10990 permerror (input_location
, "cannot declare member function %qD to have "
10991 "static linkage", decl
);
10992 invalid_static
= 1;
10994 else if (current_function_decl
)
10996 /* FIXME need arm citation */
10997 error ("cannot declare static function inside another function");
10998 invalid_static
= 1;
11001 if (invalid_static
)
11004 storage_class
= sc_none
;
11010 /* It's a variable. */
11012 /* An uninitialized decl with `extern' is a reference. */
11013 decl
= grokvardecl (type
, dname
, unqualified_id
,
11016 (type_quals
& TYPE_QUAL_CONST
) != 0,
11018 ctype
? ctype
: in_namespace
);
11019 if (decl
== NULL_TREE
)
11020 return error_mark_node
;
11022 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11023 memfn_quals
!= TYPE_UNQUALIFIED
,
11024 inlinep
, friendp
, raises
!= NULL_TREE
);
11028 DECL_CONTEXT (decl
) = ctype
;
11031 permerror (input_location
, "%<static%> may not be used when defining "
11032 "(as opposed to declaring) a static data member");
11034 storage_class
= sc_none
;
11036 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11038 error ("static member %qD declared %<register%>", decl
);
11039 storage_class
= sc_none
;
11041 if (storage_class
== sc_extern
&& pedantic
)
11043 pedwarn (input_location
, OPT_Wpedantic
,
11044 "cannot explicitly declare member %q#D to have "
11045 "extern linkage", decl
);
11046 storage_class
= sc_none
;
11049 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11051 error ("declaration of constexpr variable %qD is not a definition",
11053 constexpr_p
= false;
11057 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11059 if (toplevel_bindings_p ())
11061 /* It's common practice (and completely valid) to have a const
11062 be initialized and declared extern. */
11063 if (!(type_quals
& TYPE_QUAL_CONST
))
11064 warning (0, "%qs initialized and declared %<extern%>", name
);
11068 error ("%qs has both %<extern%> and initializer", name
);
11069 return error_mark_node
;
11073 /* Record `register' declaration for warnings on &
11074 and in case doing stupid register allocation. */
11076 if (storage_class
== sc_register
)
11077 DECL_REGISTER (decl
) = 1;
11078 else if (storage_class
== sc_extern
)
11079 DECL_THIS_EXTERN (decl
) = 1;
11080 else if (storage_class
== sc_static
)
11081 DECL_THIS_STATIC (decl
) = 1;
11083 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11084 if (constexpr_p
&& VAR_P (decl
))
11085 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11087 /* Record constancy and volatility on the DECL itself . There's
11088 no need to do this when processing a template; we'll do this
11089 for the instantiated declaration based on the type of DECL. */
11090 if (!processing_template_decl
)
11091 cp_apply_type_quals_to_decl (type_quals
, decl
);
11097 /* Subroutine of start_function. Ensure that each of the parameter
11098 types (as listed in PARMS) is complete, as is required for a
11099 function definition. */
11102 require_complete_types_for_parms (tree parms
)
11104 for (; parms
; parms
= DECL_CHAIN (parms
))
11106 if (dependent_type_p (TREE_TYPE (parms
)))
11108 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11109 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11111 relayout_decl (parms
);
11112 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11115 /* grokparms or complete_type_or_else will have already issued
11117 TREE_TYPE (parms
) = error_mark_node
;
11121 /* Returns nonzero if T is a local variable. */
11124 local_variable_p (const_tree t
)
11127 /* A VAR_DECL with a context that is a _TYPE is a static data
11129 && !TYPE_P (CP_DECL_CONTEXT (t
))
11130 /* Any other non-local variable must be at namespace scope. */
11131 && !DECL_NAMESPACE_SCOPE_P (t
))
11132 || (TREE_CODE (t
) == PARM_DECL
))
11138 /* Like local_variable_p, but suitable for use as a tree-walking
11142 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11145 if (local_variable_p (*tp
)
11146 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11148 else if (TYPE_P (*tp
))
11149 *walk_subtrees
= 0;
11154 /* Check that ARG, which is a default-argument expression for a
11155 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11156 something goes wrong. DECL may also be a _TYPE node, rather than a
11157 DECL, if there is no DECL available. */
11160 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11165 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11166 /* We get a DEFAULT_ARG when looking at an in-class declaration
11167 with a default argument. Ignore the argument for now; we'll
11168 deal with it after the class is complete. */
11177 decl_type
= TREE_TYPE (decl
);
11179 if (arg
== error_mark_node
11180 || decl
== error_mark_node
11181 || TREE_TYPE (arg
) == error_mark_node
11182 || decl_type
== error_mark_node
)
11183 /* Something already went wrong. There's no need to check
11185 return error_mark_node
;
11187 /* [dcl.fct.default]
11189 A default argument expression is implicitly converted to the
11191 ++cp_unevaluated_operand
;
11192 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11194 --cp_unevaluated_operand
;
11196 if (warn_zero_as_null_pointer_constant
11197 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11198 && null_ptr_cst_p (arg
)
11199 && (complain
& tf_warning
)
11200 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11201 return nullptr_node
;
11203 /* [dcl.fct.default]
11205 Local variables shall not be used in default argument
11208 The keyword `this' shall not be used in a default argument of a
11209 member function. */
11210 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11213 if (complain
& tf_warning_or_error
)
11215 if (DECL_NAME (var
) == this_identifier
)
11216 permerror (input_location
, "default argument %qE uses %qD",
11219 error ("default argument %qE uses local variable %qD", arg
, var
);
11221 return error_mark_node
;
11228 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11231 type_is_deprecated (tree type
)
11233 enum tree_code code
;
11234 if (TREE_DEPRECATED (type
))
11236 if (TYPE_NAME (type
)
11237 && TREE_DEPRECATED (TYPE_NAME (type
)))
11240 /* Do warn about using typedefs to a deprecated class. */
11241 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11242 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11244 code
= TREE_CODE (type
);
11246 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11247 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11248 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11249 return type_is_deprecated (TREE_TYPE (type
));
11251 if (TYPE_PTRMEMFUNC_P (type
))
11252 return type_is_deprecated
11253 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11258 /* Decode the list of parameter types for a function type.
11259 Given the list of things declared inside the parens,
11260 return a list of types.
11262 If this parameter does not end with an ellipsis, we append
11265 *PARMS is set to the chain of PARM_DECLs created. */
11268 grokparms (tree parmlist
, tree
*parms
)
11270 tree result
= NULL_TREE
;
11271 tree decls
= NULL_TREE
;
11275 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11277 tree type
= NULL_TREE
;
11278 tree init
= TREE_PURPOSE (parm
);
11279 tree decl
= TREE_VALUE (parm
);
11280 const char *errmsg
;
11282 if (parm
== void_list_node
)
11285 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11288 type
= TREE_TYPE (decl
);
11289 if (VOID_TYPE_P (type
))
11291 if (same_type_p (type
, void_type_node
)
11293 && !DECL_NAME (decl
) && !result
11294 && TREE_CHAIN (parm
) == void_list_node
)
11295 /* DR 577: A parameter list consisting of a single
11296 unnamed parameter of non-dependent type 'void'. */
11298 else if (cv_qualified_p (type
))
11299 error_at (DECL_SOURCE_LOCATION (decl
),
11300 "invalid use of cv-qualified type %qT in "
11301 "parameter declaration", type
);
11303 error_at (DECL_SOURCE_LOCATION (decl
),
11304 "invalid use of type %<void%> in parameter "
11306 /* It's not a good idea to actually create parameters of
11307 type `void'; other parts of the compiler assume that a
11308 void type terminates the parameter list. */
11309 type
= error_mark_node
;
11310 TREE_TYPE (decl
) = error_mark_node
;
11313 if (type
!= error_mark_node
11314 && TYPE_FOR_JAVA (type
)
11315 && MAYBE_CLASS_TYPE_P (type
))
11317 error ("parameter %qD has Java class type", decl
);
11318 type
= error_mark_node
;
11319 TREE_TYPE (decl
) = error_mark_node
;
11323 if (type
!= error_mark_node
11324 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11327 type
= error_mark_node
;
11328 TREE_TYPE (decl
) = error_mark_node
;
11331 if (type
!= error_mark_node
)
11333 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11335 tree deptype
= type_is_deprecated (type
);
11337 warn_deprecated_use (deptype
, NULL_TREE
);
11340 /* Top-level qualifiers on the parameters are
11341 ignored for function types. */
11342 type
= cp_build_qualified_type (type
, 0);
11343 if (TREE_CODE (type
) == METHOD_TYPE
)
11345 error ("parameter %qD invalidly declared method type", decl
);
11346 type
= build_pointer_type (type
);
11347 TREE_TYPE (decl
) = type
;
11349 else if (abstract_virtuals_error (decl
, type
))
11350 any_error
= 1; /* Seems like a good idea. */
11351 else if (POINTER_TYPE_P (type
))
11353 /* [dcl.fct]/6, parameter types cannot contain pointers
11354 (references) to arrays of unknown bound. */
11355 tree t
= TREE_TYPE (type
);
11356 int ptr
= TYPE_PTR_P (type
);
11360 if (TYPE_PTR_P (t
))
11362 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11364 else if (!TYPE_DOMAIN (t
))
11368 if (TREE_CODE (t
) == ARRAY_TYPE
)
11370 ? G_("parameter %qD includes pointer to array of "
11371 "unknown bound %qT")
11372 : G_("parameter %qD includes reference to array of "
11373 "unknown bound %qT"),
11379 else if (init
&& !processing_template_decl
)
11380 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11383 DECL_CHAIN (decl
) = decls
;
11385 result
= tree_cons (init
, type
, result
);
11387 decls
= nreverse (decls
);
11388 result
= nreverse (result
);
11390 result
= chainon (result
, void_list_node
);
11397 /* D is a constructor or overloaded `operator='.
11399 Let T be the class in which D is declared. Then, this function
11402 -1 if D's is an ill-formed constructor or copy assignment operator
11403 whose first parameter is of type `T'.
11404 0 if D is not a copy constructor or copy assignment
11406 1 if D is a copy constructor or copy assignment operator whose
11407 first parameter is a reference to non-const qualified T.
11408 2 if D is a copy constructor or copy assignment operator whose
11409 first parameter is a reference to const qualified T.
11411 This function can be used as a predicate. Positive values indicate
11412 a copy constructor and nonzero values indicate a copy assignment
11416 copy_fn_p (const_tree d
)
11422 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11424 if (TREE_CODE (d
) == TEMPLATE_DECL
11425 || (DECL_TEMPLATE_INFO (d
)
11426 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11427 /* Instantiations of template member functions are never copy
11428 functions. Note that member functions of templated classes are
11429 represented as template functions internally, and we must
11430 accept those as copy functions. */
11433 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11437 arg_type
= TREE_VALUE (args
);
11438 if (arg_type
== error_mark_node
)
11441 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11443 /* Pass by value copy assignment operator. */
11446 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11447 && !TYPE_REF_IS_RVALUE (arg_type
)
11448 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11450 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11456 args
= TREE_CHAIN (args
);
11458 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11459 /* There are more non-optional args. */
11465 /* D is a constructor or overloaded `operator='.
11467 Let T be the class in which D is declared. Then, this function
11468 returns true when D is a move constructor or move assignment
11469 operator, false otherwise. */
11472 move_fn_p (const_tree d
)
11474 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11476 if (cxx_dialect
== cxx98
)
11477 /* There are no move constructors if we are in C++98 mode. */
11480 if (TREE_CODE (d
) == TEMPLATE_DECL
11481 || (DECL_TEMPLATE_INFO (d
)
11482 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11483 /* Instantiations of template member functions are never move
11484 functions. Note that member functions of templated classes are
11485 represented as template functions internally, and we must
11486 accept those as move functions. */
11489 return move_signature_fn_p (d
);
11492 /* D is a constructor or overloaded `operator='.
11494 Then, this function returns true when D has the same signature as a move
11495 constructor or move assignment operator (because either it is such a
11496 ctor/op= or it is a template specialization with the same signature),
11497 false otherwise. */
11500 move_signature_fn_p (const_tree d
)
11504 bool result
= false;
11506 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11510 arg_type
= TREE_VALUE (args
);
11511 if (arg_type
== error_mark_node
)
11514 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11515 && TYPE_REF_IS_RVALUE (arg_type
)
11516 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11520 args
= TREE_CHAIN (args
);
11522 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11523 /* There are more non-optional args. */
11529 /* Remember any special properties of member function DECL. */
11532 grok_special_member_properties (tree decl
)
11536 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11539 class_type
= DECL_CONTEXT (decl
);
11540 if (DECL_CONSTRUCTOR_P (decl
))
11542 int ctor
= copy_fn_p (decl
);
11544 if (!DECL_ARTIFICIAL (decl
))
11545 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11551 A non-template constructor for class X is a copy
11552 constructor if its first parameter is of type X&, const
11553 X&, volatile X& or const volatile X&, and either there
11554 are no other parameters or else all other parameters have
11555 default arguments. */
11556 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11557 if (user_provided_p (decl
))
11558 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11560 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11562 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11563 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11564 else if (move_fn_p (decl
) && user_provided_p (decl
))
11565 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11566 else if (is_list_ctor (decl
))
11567 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11569 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11570 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11571 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11573 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11577 A non-template assignment operator for class X is a copy
11578 assignment operator if its parameter is of type X, X&, const
11579 X&, volatile X& or const volatile X&. */
11581 int assop
= copy_fn_p (decl
);
11585 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11586 if (user_provided_p (decl
))
11587 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11589 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11591 else if (move_fn_p (decl
) && user_provided_p (decl
))
11592 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11594 /* Destructors are handled in check_methods. */
11597 /* Check a constructor DECL has the correct form. Complains
11598 if the class has a constructor of the form X(X). */
11601 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11603 int ctor_parm
= copy_fn_p (decl
);
11609 A declaration of a constructor for a class X is ill-formed if
11610 its first parameter is of type (optionally cv-qualified) X
11611 and either there are no other parameters or else all other
11612 parameters have default arguments.
11614 We *don't* complain about member template instantiations that
11615 have this form, though; they can occur as we try to decide
11616 what constructor to use during overload resolution. Since
11617 overload resolution will never prefer such a constructor to
11618 the non-template copy constructor (which is either explicitly
11619 or implicitly defined), there's no need to worry about their
11620 existence. Theoretically, they should never even be
11621 instantiated, but that's hard to forestall. */
11622 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11630 /* An operator with this code is unary, but can also be binary. */
11633 ambi_op_p (enum tree_code code
)
11635 return (code
== INDIRECT_REF
11636 || code
== ADDR_EXPR
11637 || code
== UNARY_PLUS_EXPR
11638 || code
== NEGATE_EXPR
11639 || code
== PREINCREMENT_EXPR
11640 || code
== PREDECREMENT_EXPR
);
11643 /* An operator with this name can only be unary. */
11646 unary_op_p (enum tree_code code
)
11648 return (code
== TRUTH_NOT_EXPR
11649 || code
== BIT_NOT_EXPR
11650 || code
== COMPONENT_REF
11651 || code
== TYPE_EXPR
);
11654 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11655 errors are issued for invalid declarations. */
11658 grok_op_properties (tree decl
, bool complain
)
11660 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11662 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11663 tree name
= DECL_NAME (decl
);
11664 enum tree_code operator_code
;
11669 /* Count the number of arguments and check for ellipsis. */
11670 for (argtype
= argtypes
, arity
= 0;
11671 argtype
&& argtype
!= void_list_node
;
11672 argtype
= TREE_CHAIN (argtype
))
11674 ellipsis_p
= !argtype
;
11676 class_type
= DECL_CONTEXT (decl
);
11677 if (class_type
&& !CLASS_TYPE_P (class_type
))
11678 class_type
= NULL_TREE
;
11680 if (DECL_CONV_FN_P (decl
))
11681 operator_code
= TYPE_EXPR
;
11685 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11686 if (ansi_opname (CODE) == name) \
11688 operator_code = (CODE); \
11691 else if (ansi_assopname (CODE) == name) \
11693 operator_code = (CODE); \
11694 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11698 #include "operators.def"
11699 #undef DEF_OPERATOR
11701 gcc_unreachable ();
11704 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11705 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11708 switch (operator_code
)
11711 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11715 TYPE_GETS_DELETE (class_type
) |= 1;
11719 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11722 case VEC_DELETE_EXPR
:
11723 TYPE_GETS_DELETE (class_type
) |= 2;
11730 /* [basic.std.dynamic.allocation]/1:
11732 A program is ill-formed if an allocation function is declared
11733 in a namespace scope other than global scope or declared static
11736 The same also holds true for deallocation functions. */
11737 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11738 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11740 if (DECL_NAMESPACE_SCOPE_P (decl
))
11742 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11744 error ("%qD may not be declared within a namespace", decl
);
11747 else if (!TREE_PUBLIC (decl
))
11749 error ("%qD may not be declared as static", decl
);
11752 if (!flag_sized_deallocation
&& warn_cxx14_compat
)
11754 tree parm
= FUNCTION_ARG_CHAIN (decl
);
11755 if (parm
&& same_type_p (TREE_VALUE (parm
), size_type_node
)
11756 && TREE_CHAIN (parm
) == void_list_node
)
11757 warning_at (DECL_SOURCE_LOCATION (decl
), OPT_Wc__14_compat
,
11758 "%qD is a usual (non-placement) deallocation "
11759 "function in C++14 (or with -fsized-deallocation)",
11765 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11767 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11768 DECL_IS_OPERATOR_NEW (decl
) = 1;
11770 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11771 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11774 /* An operator function must either be a non-static member function
11775 or have at least one parameter of a class, a reference to a class,
11776 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11777 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11779 if (operator_code
== TYPE_EXPR
11780 || operator_code
== CALL_EXPR
11781 || operator_code
== COMPONENT_REF
11782 || operator_code
== ARRAY_REF
11783 || operator_code
== NOP_EXPR
)
11785 error ("%qD must be a nonstatic member function", decl
);
11792 if (DECL_STATIC_FUNCTION_P (decl
))
11794 error ("%qD must be either a non-static member "
11795 "function or a non-member function", decl
);
11799 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11801 tree arg
= non_reference (TREE_VALUE (p
));
11802 if (arg
== error_mark_node
)
11805 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11806 because these checks are performed even on
11807 template functions. */
11808 if (MAYBE_CLASS_TYPE_P (arg
)
11809 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11813 if (!p
|| p
== void_list_node
)
11816 error ("%qD must have an argument of class or "
11817 "enumerated type", decl
);
11823 /* There are no restrictions on the arguments to an overloaded
11825 if (operator_code
== CALL_EXPR
)
11828 /* Warn about conversion operators that will never be used. */
11829 if (IDENTIFIER_TYPENAME_P (name
)
11830 && ! DECL_TEMPLATE_INFO (decl
)
11832 /* Warn only declaring the function; there is no need to
11833 warn again about out-of-class definitions. */
11834 && class_type
== current_class_type
)
11836 tree t
= TREE_TYPE (name
);
11837 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11840 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11842 if (VOID_TYPE_P (t
))
11843 warning (OPT_Wconversion
,
11845 ? G_("conversion to a reference to void "
11846 "will never use a type conversion operator")
11847 : G_("conversion to void "
11848 "will never use a type conversion operator"));
11849 else if (class_type
)
11851 if (t
== class_type
)
11852 warning (OPT_Wconversion
,
11854 ? G_("conversion to a reference to the same type "
11855 "will never use a type conversion operator")
11856 : G_("conversion to the same type "
11857 "will never use a type conversion operator"));
11858 /* Don't force t to be complete here. */
11859 else if (MAYBE_CLASS_TYPE_P (t
)
11860 && COMPLETE_TYPE_P (t
)
11861 && DERIVED_FROM_P (t
, class_type
))
11862 warning (OPT_Wconversion
,
11864 ? G_("conversion to a reference to a base class "
11865 "will never use a type conversion operator")
11866 : G_("conversion to a base class "
11867 "will never use a type conversion operator"));
11872 if (operator_code
== COND_EXPR
)
11875 error ("ISO C++ prohibits overloading operator ?:");
11878 else if (ellipsis_p
)
11880 error ("%qD must not have variable number of arguments", decl
);
11883 else if (ambi_op_p (operator_code
))
11886 /* We pick the one-argument operator codes by default, so
11887 we don't have to change anything. */
11889 else if (arity
== 2)
11891 /* If we thought this was a unary operator, we now know
11892 it to be a binary operator. */
11893 switch (operator_code
)
11896 operator_code
= MULT_EXPR
;
11900 operator_code
= BIT_AND_EXPR
;
11903 case UNARY_PLUS_EXPR
:
11904 operator_code
= PLUS_EXPR
;
11908 operator_code
= MINUS_EXPR
;
11911 case PREINCREMENT_EXPR
:
11912 operator_code
= POSTINCREMENT_EXPR
;
11915 case PREDECREMENT_EXPR
:
11916 operator_code
= POSTDECREMENT_EXPR
;
11920 gcc_unreachable ();
11923 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11925 if ((operator_code
== POSTINCREMENT_EXPR
11926 || operator_code
== POSTDECREMENT_EXPR
)
11927 && ! processing_template_decl
11928 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11931 error ("postfix %qD must take %<int%> as its argument",
11934 error ("postfix %qD must take %<int%> as its second "
11942 error ("%qD must take either zero or one argument", decl
);
11944 error ("%qD must take either one or two arguments", decl
);
11948 /* More Effective C++ rule 6. */
11950 && (operator_code
== POSTINCREMENT_EXPR
11951 || operator_code
== POSTDECREMENT_EXPR
11952 || operator_code
== PREINCREMENT_EXPR
11953 || operator_code
== PREDECREMENT_EXPR
))
11955 tree arg
= TREE_VALUE (argtypes
);
11956 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11957 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11958 arg
= TREE_TYPE (arg
);
11959 arg
= TYPE_MAIN_VARIANT (arg
);
11960 if (operator_code
== PREINCREMENT_EXPR
11961 || operator_code
== PREDECREMENT_EXPR
)
11963 if (TREE_CODE (ret
) != REFERENCE_TYPE
11964 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11966 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11967 build_reference_type (arg
));
11971 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11972 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11976 else if (unary_op_p (operator_code
))
11981 error ("%qD must take %<void%>", decl
);
11983 error ("%qD must take exactly one argument", decl
);
11987 else /* if (binary_op_p (operator_code)) */
11992 error ("%qD must take exactly one argument", decl
);
11994 error ("%qD must take exactly two arguments", decl
);
11998 /* More Effective C++ rule 7. */
12000 && (operator_code
== TRUTH_ANDIF_EXPR
12001 || operator_code
== TRUTH_ORIF_EXPR
12002 || operator_code
== COMPOUND_EXPR
))
12003 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12007 /* Effective C++ rule 23. */
12010 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12011 && (operator_code
== PLUS_EXPR
12012 || operator_code
== MINUS_EXPR
12013 || operator_code
== TRUNC_DIV_EXPR
12014 || operator_code
== MULT_EXPR
12015 || operator_code
== TRUNC_MOD_EXPR
)
12016 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12017 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12019 /* [over.oper]/8 */
12020 for (; argtypes
&& argtypes
!= void_list_node
;
12021 argtypes
= TREE_CHAIN (argtypes
))
12022 if (TREE_PURPOSE (argtypes
))
12024 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12025 if (operator_code
== POSTINCREMENT_EXPR
12026 || operator_code
== POSTDECREMENT_EXPR
)
12028 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12033 error ("%qD cannot have default arguments", decl
);
12041 /* Return a string giving the keyword associate with CODE. */
12043 static const char *
12044 tag_name (enum tag_types code
)
12056 case typename_type
:
12059 gcc_unreachable ();
12063 /* Name lookup in an elaborated-type-specifier (after the keyword
12064 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12065 elaborated-type-specifier is invalid, issue a diagnostic and return
12066 error_mark_node; otherwise, return the *_TYPE to which it referred.
12067 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12070 check_elaborated_type_specifier (enum tag_types tag_code
,
12072 bool allow_template_p
)
12078 struct S { struct S *p; };
12080 name lookup will find the TYPE_DECL for the implicit "S::S"
12081 typedef. Adjust for that here. */
12082 if (DECL_SELF_REFERENCE_P (decl
))
12083 decl
= TYPE_NAME (TREE_TYPE (decl
));
12085 type
= TREE_TYPE (decl
);
12087 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12088 is false for this case as well. */
12089 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12091 error ("using template type parameter %qT after %qs",
12092 type
, tag_name (tag_code
));
12093 return error_mark_node
;
12095 /* Accept template template parameters. */
12096 else if (allow_template_p
12097 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12098 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12102 If the identifier resolves to a typedef-name or the
12103 simple-template-id resolves to an alias template
12104 specialization, the elaborated-type-specifier is ill-formed.
12106 In other words, the only legitimate declaration to use in the
12107 elaborated type specifier is the implicit typedef created when
12108 the type is declared. */
12109 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12110 && !DECL_SELF_REFERENCE_P (decl
)
12111 && tag_code
!= typename_type
)
12113 if (alias_template_specialization_p (type
))
12114 error ("using alias template specialization %qT after %qs",
12115 type
, tag_name (tag_code
));
12117 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12118 inform (DECL_SOURCE_LOCATION (decl
),
12119 "%qD has a previous declaration here", decl
);
12120 return error_mark_node
;
12122 else if (TREE_CODE (type
) != RECORD_TYPE
12123 && TREE_CODE (type
) != UNION_TYPE
12124 && tag_code
!= enum_type
12125 && tag_code
!= typename_type
)
12127 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12128 inform (input_location
, "%q+T has a previous declaration here", type
);
12129 return error_mark_node
;
12131 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12132 && tag_code
== enum_type
)
12134 error ("%qT referred to as enum", type
);
12135 inform (input_location
, "%q+T has a previous declaration here", type
);
12136 return error_mark_node
;
12138 else if (!allow_template_p
12139 && TREE_CODE (type
) == RECORD_TYPE
12140 && CLASSTYPE_IS_TEMPLATE (type
))
12142 /* If a class template appears as elaborated type specifier
12143 without a template header such as:
12145 template <class T> class C {};
12146 void f(class C); // No template header here
12148 then the required template argument is missing. */
12149 error ("template argument required for %<%s %T%>",
12150 tag_name (tag_code
),
12151 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12152 return error_mark_node
;
12158 /* Lookup NAME in elaborate type specifier in scope according to
12159 SCOPE and issue diagnostics if necessary.
12160 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12161 found, and ERROR_MARK_NODE for type error. */
12164 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12165 tag_scope scope
, bool template_header_p
)
12169 if (scope
== ts_global
)
12171 /* First try ordinary name lookup, ignoring hidden class name
12172 injected via friend declaration. */
12173 decl
= lookup_name_prefer_type (name
, 2);
12174 /* If that fails, the name will be placed in the smallest
12175 non-class, non-function-prototype scope according to 3.3.1/5.
12176 We may already have a hidden name declared as friend in this
12177 scope. So lookup again but not ignoring hidden names.
12178 If we find one, that name will be made visible rather than
12179 creating a new tag. */
12181 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12184 decl
= lookup_type_scope (name
, scope
);
12187 && (DECL_CLASS_TEMPLATE_P (decl
)
12188 /* If scope is ts_current we're defining a class, so ignore a
12189 template template parameter. */
12190 || (scope
!= ts_current
12191 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12192 decl
= DECL_TEMPLATE_RESULT (decl
);
12194 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12196 /* Look for invalid nested type:
12200 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12202 error ("%qD has the same name as the class in which it is "
12205 return error_mark_node
;
12208 /* Two cases we need to consider when deciding if a class
12209 template is allowed as an elaborated type specifier:
12210 1. It is a self reference to its own class.
12211 2. It comes with a template header.
12215 template <class T> class C {
12216 class C *c1; // DECL_SELF_REFERENCE_P is true
12219 template <class U> class C; // template_header_p is true
12220 template <class T> class C<T>::D {
12221 class C *c2; // DECL_SELF_REFERENCE_P is true
12224 t
= check_elaborated_type_specifier (tag_code
,
12227 | DECL_SELF_REFERENCE_P (decl
));
12230 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12232 error ("reference to %qD is ambiguous", name
);
12233 print_candidates (decl
);
12234 return error_mark_node
;
12240 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12241 Define the tag as a forward-reference if it is not defined.
12243 If a declaration is given, process it here, and report an error if
12244 multiple declarations are not identical.
12246 SCOPE is TS_CURRENT when this is also a definition. Only look in
12247 the current frame for the name (since C++ allows new names in any
12248 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12249 declaration. Only look beginning from the current scope outward up
12250 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12252 TEMPLATE_HEADER_P is true when this declaration is preceded by
12253 a set of template parameters. */
12256 xref_tag_1 (enum tag_types tag_code
, tree name
,
12257 tag_scope orig_scope
, bool template_header_p
)
12259 enum tree_code code
;
12261 tree context
= NULL_TREE
;
12264 gcc_assert (identifier_p (name
));
12270 code
= RECORD_TYPE
;
12276 code
= ENUMERAL_TYPE
;
12279 gcc_unreachable ();
12282 if (orig_scope
== ts_lambda
)
12283 scope
= ts_current
;
12285 scope
= orig_scope
;
12287 /* In case of anonymous name, xref_tag is only called to
12288 make type node and push name. Name lookup is not required. */
12289 if (ANON_AGGRNAME_P (name
))
12292 t
= lookup_and_check_tag (tag_code
, name
,
12293 scope
, template_header_p
);
12295 if (t
== error_mark_node
)
12296 return error_mark_node
;
12298 if (scope
!= ts_current
&& t
&& current_class_type
12299 && template_class_depth (current_class_type
)
12300 && template_header_p
)
12302 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12305 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12306 definition of this tag. Since, in addition, we are currently
12307 processing a (member) template declaration of a template
12308 class, we must be very careful; consider:
12315 { template <class V>
12316 friend struct S1; };
12318 Here, the S2::S1 declaration should not be confused with the
12319 outer declaration. In particular, the inner version should
12320 have a template parameter of level 2, not level 1. This
12321 would be particularly important if the member declaration
12324 template <class V = U> friend struct S1;
12326 say, when we should tsubst into `U' when instantiating
12327 S2. On the other hand, when presented with:
12337 we must find the inner binding eventually. We
12338 accomplish this by making sure that the new type we
12339 create to represent this declaration has the right
12341 context
= TYPE_CONTEXT (t
);
12347 /* If no such tag is yet defined, create a forward-reference node
12348 and record it as the "definition".
12349 When a real declaration of this type is found,
12350 the forward-reference will be altered into a real type. */
12351 if (code
== ENUMERAL_TYPE
)
12353 error ("use of enum %q#D without previous declaration", name
);
12354 return error_mark_node
;
12358 t
= make_class_type (code
);
12359 TYPE_CONTEXT (t
) = context
;
12360 if (orig_scope
== ts_lambda
)
12361 /* Remember that we're declaring a lambda to avoid bogus errors
12362 in push_template_decl. */
12363 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12364 t
= pushtag (name
, t
, scope
);
12369 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12371 if (!redeclare_class_template (t
, current_template_parms
))
12372 return error_mark_node
;
12374 else if (!processing_template_decl
12375 && CLASS_TYPE_P (t
)
12376 && CLASSTYPE_IS_TEMPLATE (t
))
12378 error ("redeclaration of %qT as a non-template", t
);
12379 error ("previous declaration %q+D", t
);
12380 return error_mark_node
;
12383 /* Make injected friend class visible. */
12384 if (scope
!= ts_within_enclosing_non_class
12385 && hidden_name_p (TYPE_NAME (t
)))
12387 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12388 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12390 if (TYPE_TEMPLATE_INFO (t
))
12392 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12393 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12401 /* Wrapper for xref_tag_1. */
12404 xref_tag (enum tag_types tag_code
, tree name
,
12405 tag_scope scope
, bool template_header_p
)
12409 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12410 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12411 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12417 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12419 enum tag_types tag_kind
;
12421 if (TREE_CODE (old
) == RECORD_TYPE
)
12422 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12424 tag_kind
= union_type
;
12426 if (id
== NULL_TREE
)
12427 id
= TYPE_IDENTIFIER (old
);
12429 return xref_tag (tag_kind
, id
, scope
, false);
12432 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12433 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12434 access_* node, and the TREE_VALUE is the type of the base-class.
12435 Non-NULL TREE_TYPE indicates virtual inheritance.
12437 Returns true if the binfo hierarchy was successfully created,
12438 false if an error was detected. */
12441 xref_basetypes (tree ref
, tree base_list
)
12444 tree binfo
, base_binfo
;
12445 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12446 unsigned max_bases
= 0; /* Maximum direct bases. */
12448 tree default_access
;
12449 tree igo_prev
; /* Track Inheritance Graph Order. */
12451 if (ref
== error_mark_node
)
12454 /* The base of a derived class is private by default, all others are
12456 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12457 && CLASSTYPE_DECLARED_CLASS (ref
)
12458 ? access_private_node
: access_public_node
);
12460 /* First, make sure that any templates in base-classes are
12461 instantiated. This ensures that if we call ourselves recursively
12462 we do not get confused about which classes are marked and which
12464 basep
= &base_list
;
12467 tree basetype
= TREE_VALUE (*basep
);
12469 /* The dependent_type_p call below should really be dependent_scope_p
12470 so that we give a hard error about using an incomplete type as a
12471 base, but we allow it with a pedwarn for backward
12473 if (processing_template_decl
12474 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12475 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12476 if (!dependent_type_p (basetype
)
12477 && !complete_type_or_else (basetype
, NULL
))
12478 /* An incomplete type. Remove it from the list. */
12479 *basep
= TREE_CHAIN (*basep
);
12483 if (TREE_TYPE (*basep
))
12485 if (CLASS_TYPE_P (basetype
))
12486 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12487 basep
= &TREE_CHAIN (*basep
);
12491 TYPE_MARKED_P (ref
) = 1;
12493 /* The binfo slot should be empty, unless this is an (ill-formed)
12495 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12497 error ("redefinition of %q#T", ref
);
12501 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12503 binfo
= make_tree_binfo (max_bases
);
12505 TYPE_BINFO (ref
) = binfo
;
12506 BINFO_OFFSET (binfo
) = size_zero_node
;
12507 BINFO_TYPE (binfo
) = ref
;
12509 /* Apply base-class info set up to the variants of this type. */
12510 fixup_type_variants (ref
);
12514 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12515 /* An aggregate cannot have baseclasses. */
12516 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12518 if (TREE_CODE (ref
) == UNION_TYPE
)
12520 error ("derived union %qT invalid", ref
);
12527 if (TYPE_FOR_JAVA (ref
))
12529 error ("Java class %qT cannot have multiple bases", ref
);
12536 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12538 if (TYPE_FOR_JAVA (ref
))
12540 error ("Java class %qT cannot have virtual bases", ref
);
12545 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12547 tree access
= TREE_PURPOSE (base_list
);
12548 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12549 tree basetype
= TREE_VALUE (base_list
);
12551 if (access
== access_default_node
)
12552 access
= default_access
;
12554 if (PACK_EXPANSION_P (basetype
))
12555 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12556 if (TREE_CODE (basetype
) == TYPE_DECL
)
12557 basetype
= TREE_TYPE (basetype
);
12558 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12560 error ("base type %qT fails to be a struct or class type",
12565 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12566 TYPE_FOR_JAVA (ref
) = 1;
12568 base_binfo
= NULL_TREE
;
12569 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12571 base_binfo
= TYPE_BINFO (basetype
);
12572 /* The original basetype could have been a typedef'd type. */
12573 basetype
= BINFO_TYPE (base_binfo
);
12575 /* Inherit flags from the base. */
12576 TYPE_HAS_NEW_OPERATOR (ref
)
12577 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12578 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12579 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12580 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12581 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12582 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12583 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12584 CLASSTYPE_REPEATED_BASE_P (ref
)
12585 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12588 /* We must do this test after we've seen through a typedef
12590 if (TYPE_MARKED_P (basetype
))
12592 if (basetype
== ref
)
12593 error ("recursive type %qT undefined", basetype
);
12595 error ("duplicate base type %qT invalid", basetype
);
12599 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12600 /* Regenerate the pack expansion for the bases. */
12601 basetype
= make_pack_expansion (basetype
);
12603 TYPE_MARKED_P (basetype
) = 1;
12605 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12606 &igo_prev
, via_virtual
);
12607 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12608 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12610 BINFO_BASE_APPEND (binfo
, base_binfo
);
12611 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12614 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12615 /* If we didn't get max_vbases vbases, we must have shared at
12616 least one of them, and are therefore diamond shaped. */
12617 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12619 /* Unmark all the types. */
12620 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12621 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12622 TYPE_MARKED_P (ref
) = 0;
12624 /* Now see if we have a repeated base type. */
12625 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12627 for (base_binfo
= binfo
; base_binfo
;
12628 base_binfo
= TREE_CHAIN (base_binfo
))
12630 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12632 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12635 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12637 for (base_binfo
= binfo
; base_binfo
;
12638 base_binfo
= TREE_CHAIN (base_binfo
))
12639 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12640 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12649 /* Copies the enum-related properties from type SRC to type DST.
12650 Used with the underlying type of an enum and the enum itself. */
12652 copy_type_enum (tree dst
, tree src
)
12655 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12657 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12658 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12659 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12660 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12661 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12662 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12663 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12664 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12665 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12669 /* Begin compiling the definition of an enumeration type.
12672 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12674 UNDERLYING_TYPE is the type that will be used as the storage for
12675 the enumeration type. This should be NULL_TREE if no storage type
12678 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12680 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12682 Returns the type object, as yet incomplete.
12683 Also records info about it so that build_enumerator
12684 may be used to declare the individual values as they are read. */
12687 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12688 bool scoped_enum_p
, bool *is_new
)
12690 tree prevtype
= NULL_TREE
;
12691 gcc_assert (identifier_p (name
));
12695 /* [C++0x dcl.enum]p5:
12697 If not explicitly specified, the underlying type of a scoped
12698 enumeration type is int. */
12699 if (!underlying_type
&& scoped_enum_p
)
12700 underlying_type
= integer_type_node
;
12702 if (underlying_type
)
12703 underlying_type
= cv_unqualified (underlying_type
);
12705 /* If this is the real definition for a previous forward reference,
12706 fill in the contents in the same object that used to be the
12707 forward reference. */
12709 enumtype
= lookup_and_check_tag (enum_type
, name
,
12710 /*tag_scope=*/ts_current
,
12711 /*template_header_p=*/false);
12713 /* In case of a template_decl, the only check that should be deferred
12714 to instantiation time is the comparison of underlying types. */
12715 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12717 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12719 error_at (input_location
, "scoped/unscoped mismatch "
12720 "in enum %q#T", enumtype
);
12721 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12722 "previous definition here");
12723 enumtype
= error_mark_node
;
12725 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12727 error_at (input_location
, "underlying type mismatch "
12728 "in enum %q#T", enumtype
);
12729 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12730 "previous definition here");
12731 enumtype
= error_mark_node
;
12733 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12734 && !dependent_type_p (underlying_type
)
12735 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12736 && !same_type_p (underlying_type
,
12737 ENUM_UNDERLYING_TYPE (enumtype
)))
12739 error_at (input_location
, "different underlying type "
12740 "in enum %q#T", enumtype
);
12741 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12742 "previous definition here");
12743 underlying_type
= NULL_TREE
;
12747 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12748 || processing_template_decl
)
12750 /* In case of error, make a dummy enum to allow parsing to
12752 if (enumtype
== error_mark_node
)
12754 name
= make_anon_name ();
12755 enumtype
= NULL_TREE
;
12758 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12759 of an opaque enum, or an opaque enum of an already defined
12760 enumeration (C++0x only).
12761 In any other case, it'll be NULL_TREE. */
12767 prevtype
= enumtype
;
12769 /* Do not push the decl more than once, unless we need to
12770 compare underlying types at instantiation time */
12772 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12773 || (underlying_type
12774 && dependent_type_p (underlying_type
))
12775 || (ENUM_UNDERLYING_TYPE (enumtype
)
12776 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12778 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12779 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12782 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12785 if (enumtype
== error_mark_node
)
12786 return error_mark_node
;
12788 /* The enum is considered opaque until the opening '{' of the
12789 enumerator list. */
12790 SET_OPAQUE_ENUM_P (enumtype
, true);
12791 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12794 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12796 if (underlying_type
)
12798 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12800 copy_type_enum (enumtype
, underlying_type
);
12801 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12803 else if (dependent_type_p (underlying_type
))
12804 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12806 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12807 underlying_type
, enumtype
);
12810 /* If into a template class, the returned enum is always the first
12811 declaration (opaque or not) seen. This way all the references to
12812 this type will be to the same declaration. The following ones are used
12813 only to check for definition errors. */
12814 if (prevtype
&& processing_template_decl
)
12820 /* After processing and defining all the values of an enumeration type,
12821 install their decls in the enumeration type.
12822 ENUMTYPE is the type object. */
12825 finish_enum_value_list (tree enumtype
)
12828 tree underlying_type
;
12831 tree minnode
, maxnode
;
12834 bool fixed_underlying_type_p
12835 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12837 /* We built up the VALUES in reverse order. */
12838 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12840 /* For an enum defined in a template, just set the type of the values;
12841 all further processing is postponed until the template is
12842 instantiated. We need to set the type so that tsubst of a CONST_DECL
12844 if (processing_template_decl
)
12846 for (values
= TYPE_VALUES (enumtype
);
12848 values
= TREE_CHAIN (values
))
12849 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12853 /* Determine the minimum and maximum values of the enumerators. */
12854 if (TYPE_VALUES (enumtype
))
12856 minnode
= maxnode
= NULL_TREE
;
12858 for (values
= TYPE_VALUES (enumtype
);
12860 values
= TREE_CHAIN (values
))
12862 decl
= TREE_VALUE (values
);
12864 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12865 each enumerator has the type of its enumeration. Prior to the
12866 closing brace, the type of each enumerator is the type of its
12867 initializing value. */
12868 TREE_TYPE (decl
) = enumtype
;
12870 /* Update the minimum and maximum values, if appropriate. */
12871 value
= DECL_INITIAL (decl
);
12872 if (value
== error_mark_node
)
12873 value
= integer_zero_node
;
12874 /* Figure out what the minimum and maximum values of the
12875 enumerators are. */
12877 minnode
= maxnode
= value
;
12878 else if (tree_int_cst_lt (maxnode
, value
))
12880 else if (tree_int_cst_lt (value
, minnode
))
12887 If the enumerator-list is empty, the underlying type is as if
12888 the enumeration had a single enumerator with value 0. */
12889 minnode
= maxnode
= integer_zero_node
;
12891 if (!fixed_underlying_type_p
)
12893 /* Compute the number of bits require to represent all values of the
12894 enumeration. We must do this before the type of MINNODE and
12895 MAXNODE are transformed, since tree_int_cst_min_precision relies
12896 on the TREE_TYPE of the value it is passed. */
12897 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12898 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12899 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12900 int precision
= MAX (lowprec
, highprec
);
12902 bool use_short_enum
;
12904 /* Determine the underlying type of the enumeration.
12908 The underlying type of an enumeration is an integral type that
12909 can represent all the enumerator values defined in the
12910 enumeration. It is implementation-defined which integral type is
12911 used as the underlying type for an enumeration except that the
12912 underlying type shall not be larger than int unless the value of
12913 an enumerator cannot fit in an int or unsigned int.
12915 We use "int" or an "unsigned int" as the underlying type, even if
12916 a smaller integral type would work, unless the user has
12917 explicitly requested that we use the smallest possible type. The
12918 user can request that for all enumerations with a command line
12919 flag, or for just one enumeration with an attribute. */
12921 use_short_enum
= flag_short_enums
12922 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12924 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12928 underlying_type
= integer_types
[itk
];
12929 if (underlying_type
!= NULL_TREE
12930 && TYPE_PRECISION (underlying_type
) >= precision
12931 && TYPE_SIGN (underlying_type
) == sgn
)
12934 if (itk
== itk_none
)
12938 IF no integral type can represent all the enumerator values, the
12939 enumeration is ill-formed. */
12940 error ("no integral type can represent all of the enumerator values "
12941 "for %qT", enumtype
);
12942 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12943 underlying_type
= integer_types
[itk_unsigned_long_long
];
12948 The value of sizeof() applied to an enumeration type, an object
12949 of an enumeration type, or an enumerator, is the value of sizeof()
12950 applied to the underlying type. */
12951 copy_type_enum (enumtype
, underlying_type
);
12953 /* Compute the minimum and maximum values for the type.
12957 For an enumeration where emin is the smallest enumerator and emax
12958 is the largest, the values of the enumeration are the values of the
12959 underlying type in the range bmin to bmax, where bmin and bmax are,
12960 respectively, the smallest and largest values of the smallest bit-
12961 field that can store emin and emax. */
12963 /* The middle-end currently assumes that types with TYPE_PRECISION
12964 narrower than their underlying type are suitably zero or sign
12965 extended to fill their mode. Similarly, it assumes that the front
12966 end assures that a value of a particular type must be within
12967 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12969 We used to set these fields based on bmin and bmax, but that led
12970 to invalid assumptions like optimizing away bounds checking. So
12971 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12972 TYPE_MAX_VALUE to the values for the mode above and only restrict
12973 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12974 ENUM_UNDERLYING_TYPE (enumtype
)
12975 = build_distinct_type_copy (underlying_type
);
12976 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12977 set_min_and_max_values_for_integral_type
12978 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12980 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12981 if (flag_strict_enums
)
12982 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12985 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12987 /* Convert each of the enumerators to the type of the underlying
12988 type of the enumeration. */
12989 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12991 location_t saved_location
;
12993 decl
= TREE_VALUE (values
);
12994 saved_location
= input_location
;
12995 input_location
= DECL_SOURCE_LOCATION (decl
);
12996 if (fixed_underlying_type_p
)
12997 /* If the enumeration type has a fixed underlying type, we
12998 already checked all of the enumerator values. */
12999 value
= DECL_INITIAL (decl
);
13001 value
= perform_implicit_conversion (underlying_type
,
13002 DECL_INITIAL (decl
),
13003 tf_warning_or_error
);
13004 input_location
= saved_location
;
13006 /* Do not clobber shared ints. */
13007 value
= copy_node (value
);
13009 TREE_TYPE (value
) = enumtype
;
13010 DECL_INITIAL (decl
) = value
;
13013 /* Fix up all variant types of this enum type. */
13014 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13015 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13017 if (at_class_scope_p ()
13018 && COMPLETE_TYPE_P (current_class_type
)
13019 && UNSCOPED_ENUM_P (enumtype
))
13020 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13021 current_class_type
);
13023 /* Finish debugging output for this type. */
13024 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13027 /* Finishes the enum type. This is called only the first time an
13028 enumeration is seen, be it opaque or odinary.
13029 ENUMTYPE is the type object. */
13032 finish_enum (tree enumtype
)
13034 if (processing_template_decl
)
13036 if (at_function_scope_p ())
13037 add_stmt (build_min (TAG_DEFN
, enumtype
));
13041 /* If this is a forward declaration, there should not be any variants,
13042 though we can get a variant in the middle of an enum-specifier with
13043 wacky code like 'enum E { e = sizeof(const E*) };' */
13044 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13045 && (TYPE_VALUES (enumtype
)
13046 || !TYPE_NEXT_VARIANT (enumtype
)));
13049 /* Build and install a CONST_DECL for an enumeration constant of the
13050 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13051 LOC is the location of NAME.
13052 Assignment of sequential values by default is handled here. */
13055 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
13061 /* scalar_constant_value will pull out this expression, so make sure
13062 it's folded as appropriate. */
13063 if (processing_template_decl
)
13064 value
= fold_non_dependent_expr (value
);
13066 /* If the VALUE was erroneous, pretend it wasn't there; that will
13067 result in the enum being assigned the next value in sequence. */
13068 if (value
== error_mark_node
)
13071 /* Remove no-op casts from the value. */
13073 STRIP_TYPE_NOPS (value
);
13075 if (! processing_template_decl
)
13077 /* Validate and default VALUE. */
13078 if (value
!= NULL_TREE
)
13080 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13082 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13087 else if (! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13088 value
= perform_implicit_conversion_flags
13089 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13090 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13092 if (value
== error_mark_node
)
13095 if (value
!= NULL_TREE
)
13097 value
= cxx_constant_value (value
);
13099 if (TREE_CODE (value
) != INTEGER_CST
13100 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13102 error ("enumerator value for %qD is not an integer constant",
13109 /* Default based on previous value. */
13110 if (value
== NULL_TREE
)
13112 if (TYPE_VALUES (enumtype
))
13117 /* C++03 7.2/4: If no initializer is specified for the first
13118 enumerator, the type is an unspecified integral
13119 type. Otherwise the type is the same as the type of the
13120 initializing value of the preceding enumerator unless the
13121 incremented value is not representable in that type, in
13122 which case the type is an unspecified integral type
13123 sufficient to contain the incremented value. */
13124 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13125 if (error_operand_p (prev_value
))
13126 value
= error_mark_node
;
13129 tree type
= TREE_TYPE (prev_value
);
13130 signop sgn
= TYPE_SIGN (type
);
13131 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13135 bool pos
= !wi::neg_p (wi
, sgn
);
13136 if (!wi::fits_to_tree_p (wi
, type
))
13139 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13141 type
= integer_types
[itk
];
13142 if (type
!= NULL_TREE
13143 && (pos
|| !TYPE_UNSIGNED (type
))
13144 && wi::fits_to_tree_p (wi
, type
))
13147 if (type
&& cxx_dialect
< cxx11
13148 && itk
> itk_unsigned_long
)
13149 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13150 incremented enumerator value is too large for %<unsigned long%>" : "\
13151 incremented enumerator value is too large for %<long%>");
13153 if (type
== NULL_TREE
)
13156 value
= wide_int_to_tree (type
, wi
);
13161 error ("overflow in enumeration values at %qD", name
);
13162 value
= error_mark_node
;
13167 value
= integer_zero_node
;
13170 /* Remove no-op casts from the value. */
13171 STRIP_TYPE_NOPS (value
);
13173 /* If the underlying type of the enum is fixed, check whether
13174 the enumerator values fits in the underlying type. If it
13175 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13176 if (ENUM_UNDERLYING_TYPE (enumtype
)
13178 && TREE_CODE (value
) == INTEGER_CST
)
13180 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13181 error ("enumerator value %E is outside the range of underlying "
13182 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13184 /* Convert the value to the appropriate type. */
13185 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13189 /* C++ associates enums with global, function, or class declarations. */
13190 context
= current_scope ();
13192 /* Build the actual enumeration constant. Note that the enumeration
13193 constants have the underlying type of the enum (if it is fixed)
13194 or the type of their initializer (if the underlying type of the
13195 enum is not fixed):
13199 If the underlying type is fixed, the type of each enumerator
13200 prior to the closing brace is the underlying type; if the
13201 initializing value of an enumerator cannot be represented by
13202 the underlying type, the program is ill-formed. If the
13203 underlying type is not fixed, the type of each enumerator is
13204 the type of its initializing value.
13206 If the underlying type is not fixed, it will be computed by
13207 finish_enum and we will reset the type of this enumerator. Of
13208 course, if we're processing a template, there may be no value. */
13209 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13211 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13213 DECL_CONTEXT (decl
) = enumtype
;
13214 TREE_CONSTANT (decl
) = 1;
13215 TREE_READONLY (decl
) = 1;
13216 DECL_INITIAL (decl
) = value
;
13218 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13219 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13220 on the TYPE_FIELDS list for `S'. (That's so that you can say
13221 things like `S::i' later.) */
13222 finish_member_declaration (decl
);
13226 /* Add this enumeration constant to the list for this type. */
13227 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13230 /* Look for an enumerator with the given NAME within the enumeration
13231 type ENUMTYPE. This routine is used primarily for qualified name
13232 lookup into an enumerator in C++0x, e.g.,
13234 enum class Color { Red, Green, Blue };
13236 Color color = Color::Red;
13238 Returns the value corresponding to the enumerator, or
13239 NULL_TREE if no such enumerator was found. */
13241 lookup_enumerator (tree enumtype
, tree name
)
13244 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13246 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13247 return e
? TREE_VALUE (e
) : NULL_TREE
;
13251 /* We're defining DECL. Make sure that its type is OK. */
13254 check_function_type (tree decl
, tree current_function_parms
)
13256 tree fntype
= TREE_TYPE (decl
);
13257 tree return_type
= complete_type (TREE_TYPE (fntype
));
13259 /* In a function definition, arg types must be complete. */
13260 require_complete_types_for_parms (current_function_parms
);
13262 if (dependent_type_p (return_type
)
13263 || type_uses_auto (return_type
))
13265 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13266 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13268 tree args
= TYPE_ARG_TYPES (fntype
);
13270 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13271 error ("return type %q#T is incomplete", return_type
);
13273 error ("return type has Java class type %q#T", return_type
);
13275 /* Make it return void instead. */
13276 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13277 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13279 TREE_CHAIN (args
));
13281 fntype
= build_function_type (void_type_node
, args
);
13283 = build_exception_variant (fntype
,
13284 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13285 fntype
= (cp_build_type_attribute_variant
13286 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13287 TREE_TYPE (decl
) = fntype
;
13290 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13293 /* Create the FUNCTION_DECL for a function definition.
13294 DECLSPECS and DECLARATOR are the parts of the declaration;
13295 they describe the function's name and the type it returns,
13296 but twisted together in a fashion that parallels the syntax of C.
13298 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13299 DECLARATOR is really the DECL for the function we are about to
13300 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13301 indicating that the function is an inline defined in-class.
13303 This function creates a binding context for the function body
13304 as well as setting up the FUNCTION_DECL in current_function_decl.
13306 For C++, we must first check whether that datum makes any sense.
13307 For example, "class A local_a(1,2);" means that variable local_a
13308 is an aggregate of type A, which should have a constructor
13309 applied to it with the argument list [1, 2].
13311 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13312 or may be a BLOCK if the function has been defined previously
13313 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13314 error_mark_node if the function has never been defined, or
13315 a BLOCK if the function has been defined somewhere. */
13318 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13320 tree ctype
= NULL_TREE
;
13323 int doing_friend
= 0;
13324 cp_binding_level
*bl
;
13325 tree current_function_parms
;
13326 struct c_fileinfo
*finfo
13327 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13328 bool honor_interface
;
13330 /* Sanity check. */
13331 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13332 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13334 fntype
= TREE_TYPE (decl1
);
13335 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13336 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13338 /* ISO C++ 11.4/5. A friend function defined in a class is in
13339 the (lexical) scope of the class in which it is defined. */
13340 if (!ctype
&& DECL_FRIEND_P (decl1
))
13342 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13344 /* CTYPE could be null here if we're dealing with a template;
13345 for example, `inline friend float foo()' inside a template
13346 will have no CTYPE set. */
13347 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13353 if (DECL_DECLARED_INLINE_P (decl1
)
13354 && lookup_attribute ("noinline", attrs
))
13355 warning (0, "inline function %q+D given attribute noinline", decl1
);
13357 /* Handle gnu_inline attribute. */
13358 if (GNU_INLINE_P (decl1
))
13360 DECL_EXTERNAL (decl1
) = 1;
13361 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13362 DECL_INTERFACE_KNOWN (decl1
) = 1;
13363 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13366 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13367 /* This is a constructor, we must ensure that any default args
13368 introduced by this definition are propagated to the clones
13369 now. The clones are used directly in overload resolution. */
13370 adjust_clone_args (decl1
);
13372 /* Sometimes we don't notice that a function is a static member, and
13373 build a METHOD_TYPE for it. Fix that up now. */
13374 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13375 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13377 /* Set up current_class_type, and enter the scope of the class, if
13380 push_nested_class (ctype
);
13381 else if (DECL_STATIC_FUNCTION_P (decl1
))
13382 push_nested_class (DECL_CONTEXT (decl1
));
13384 /* Now that we have entered the scope of the class, we must restore
13385 the bindings for any template parameters surrounding DECL1, if it
13386 is an inline member template. (Order is important; consider the
13387 case where a template parameter has the same name as a field of
13388 the class.) It is not until after this point that
13389 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13390 if (flags
& SF_INCLASS_INLINE
)
13391 maybe_begin_member_template_processing (decl1
);
13393 /* Effective C++ rule 15. */
13395 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13396 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13397 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13399 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13400 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13401 if (!DECL_INITIAL (decl1
))
13402 DECL_INITIAL (decl1
) = error_mark_node
;
13404 /* This function exists in static storage.
13405 (This does not mean `static' in the C sense!) */
13406 TREE_STATIC (decl1
) = 1;
13408 /* We must call push_template_decl after current_class_type is set
13409 up. (If we are processing inline definitions after exiting a
13410 class scope, current_class_type will be NULL_TREE until set above
13411 by push_nested_class.) */
13412 if (processing_template_decl
)
13414 tree newdecl1
= push_template_decl (decl1
);
13415 if (newdecl1
== error_mark_node
)
13417 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13418 pop_nested_class ();
13424 /* We are now in the scope of the function being defined. */
13425 current_function_decl
= decl1
;
13427 /* Save the parm names or decls from this function's declarator
13428 where store_parm_decls will find them. */
13429 current_function_parms
= DECL_ARGUMENTS (decl1
);
13431 /* Make sure the parameter and return types are reasonable. When
13432 you declare a function, these types can be incomplete, but they
13433 must be complete when you define the function. */
13434 check_function_type (decl1
, current_function_parms
);
13436 /* Build the return declaration for the function. */
13437 restype
= TREE_TYPE (fntype
);
13439 if (DECL_RESULT (decl1
) == NULL_TREE
)
13443 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13444 DECL_ARTIFICIAL (resdecl
) = 1;
13445 DECL_IGNORED_P (resdecl
) = 1;
13446 DECL_RESULT (decl1
) = resdecl
;
13448 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13451 /* Let the user know we're compiling this function. */
13452 announce_function (decl1
);
13454 /* Record the decl so that the function name is defined.
13455 If we already have a decl for this name, and it is a FUNCTION_DECL,
13456 use the old decl. */
13457 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13459 /* A specialization is not used to guide overload resolution. */
13460 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13461 && !(DECL_USE_TEMPLATE (decl1
) &&
13462 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13464 tree olddecl
= pushdecl (decl1
);
13466 if (olddecl
== error_mark_node
)
13467 /* If something went wrong when registering the declaration,
13468 use DECL1; we have to have a FUNCTION_DECL to use when
13469 parsing the body of the function. */
13473 /* Otherwise, OLDDECL is either a previous declaration
13474 of the same function or DECL1 itself. */
13476 if (warn_missing_declarations
13477 && olddecl
== decl1
13478 && !DECL_MAIN_P (decl1
)
13479 && TREE_PUBLIC (decl1
)
13480 && !DECL_DECLARED_INLINE_P (decl1
))
13484 /* Check whether DECL1 is in an anonymous
13486 for (context
= DECL_CONTEXT (decl1
);
13488 context
= DECL_CONTEXT (context
))
13490 if (TREE_CODE (context
) == NAMESPACE_DECL
13491 && DECL_NAME (context
) == NULL_TREE
)
13495 if (context
== NULL
)
13496 warning (OPT_Wmissing_declarations
,
13497 "no previous declaration for %q+D", decl1
);
13505 /* We need to set the DECL_CONTEXT. */
13506 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13507 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13509 fntype
= TREE_TYPE (decl1
);
13510 restype
= TREE_TYPE (fntype
);
13512 /* If #pragma weak applies, mark the decl appropriately now.
13513 The pragma only applies to global functions. Because
13514 determining whether or not the #pragma applies involves
13515 computing the mangled name for the declaration, we cannot
13516 apply the pragma until after we have merged this declaration
13517 with any previous declarations; if the original declaration
13518 has a linkage specification, that specification applies to
13519 the definition as well, and may affect the mangled name. */
13520 if (DECL_FILE_SCOPE_P (decl1
))
13521 maybe_apply_pragma_weak (decl1
);
13524 /* Reset this in case the call to pushdecl changed it. */
13525 current_function_decl
= decl1
;
13527 gcc_assert (DECL_INITIAL (decl1
));
13529 /* This function may already have been parsed, in which case just
13530 return; our caller will skip over the body without parsing. */
13531 if (DECL_INITIAL (decl1
) != error_mark_node
)
13534 /* Initialize RTL machinery. We cannot do this until
13535 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13536 even when processing a template; this is how we get
13537 CFUN set up, and our per-function variables initialized.
13538 FIXME factor out the non-RTL stuff. */
13539 bl
= current_binding_level
;
13540 allocate_struct_function (decl1
, processing_template_decl
);
13542 /* Initialize the language data structures. Whenever we start
13543 a new function, we destroy temporaries in the usual way. */
13544 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13545 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13546 current_binding_level
= bl
;
13548 if (!processing_template_decl
&& type_uses_auto (restype
))
13550 FNDECL_USED_AUTO (decl1
) = true;
13551 current_function_auto_return_pattern
= restype
;
13554 /* Start the statement-tree, start the tree now. */
13555 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13557 /* If we are (erroneously) defining a function that we have already
13558 defined before, wipe out what we knew before. */
13559 if (!DECL_PENDING_INLINE_P (decl1
))
13560 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13562 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13564 /* We know that this was set up by `grokclassfn'. We do not
13565 wait until `store_parm_decls', since evil parse errors may
13566 never get us to that point. Here we keep the consistency
13567 between `current_class_type' and `current_class_ptr'. */
13568 tree t
= DECL_ARGUMENTS (decl1
);
13570 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13571 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13573 cp_function_chain
->x_current_class_ref
13574 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13575 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13576 cp_function_chain
->x_current_class_ptr
= t
;
13578 /* Constructors and destructors need to know whether they're "in
13579 charge" of initializing virtual base classes. */
13580 t
= DECL_CHAIN (t
);
13581 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13583 current_in_charge_parm
= t
;
13584 t
= DECL_CHAIN (t
);
13586 if (DECL_HAS_VTT_PARM_P (decl1
))
13588 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13589 current_vtt_parm
= t
;
13593 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13594 /* Implicitly-defined methods (like the
13595 destructor for a class in which no destructor
13596 is explicitly declared) must not be defined
13597 until their definition is needed. So, we
13598 ignore interface specifications for
13599 compiler-generated functions. */
13600 && !DECL_ARTIFICIAL (decl1
));
13602 if (processing_template_decl
)
13603 /* Don't mess with interface flags. */;
13604 else if (DECL_INTERFACE_KNOWN (decl1
))
13606 tree ctx
= decl_function_context (decl1
);
13608 if (DECL_NOT_REALLY_EXTERN (decl1
))
13609 DECL_EXTERNAL (decl1
) = 0;
13611 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13612 /* This is a function in a local class in an extern inline
13613 or template function. */
13614 comdat_linkage (decl1
);
13616 /* If this function belongs to an interface, it is public.
13617 If it belongs to someone else's interface, it is also external.
13618 This only affects inlines and template instantiations. */
13619 else if (!finfo
->interface_unknown
&& honor_interface
)
13621 if (DECL_DECLARED_INLINE_P (decl1
)
13622 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13624 DECL_EXTERNAL (decl1
)
13625 = (finfo
->interface_only
13626 || (DECL_DECLARED_INLINE_P (decl1
)
13627 && ! flag_implement_inlines
13628 && !DECL_VINDEX (decl1
)));
13630 /* For WIN32 we also want to put these in linkonce sections. */
13631 maybe_make_one_only (decl1
);
13634 DECL_EXTERNAL (decl1
) = 0;
13635 DECL_INTERFACE_KNOWN (decl1
) = 1;
13636 /* If this function is in an interface implemented in this file,
13637 make sure that the back end knows to emit this function
13639 if (!DECL_EXTERNAL (decl1
))
13640 mark_needed (decl1
);
13642 else if (finfo
->interface_unknown
&& finfo
->interface_only
13643 && honor_interface
)
13645 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13646 interface, we will have both finfo->interface_unknown and
13647 finfo->interface_only set. In that case, we don't want to
13648 use the normal heuristics because someone will supply a
13649 #pragma implementation elsewhere, and deducing it here would
13650 produce a conflict. */
13651 comdat_linkage (decl1
);
13652 DECL_EXTERNAL (decl1
) = 0;
13653 DECL_INTERFACE_KNOWN (decl1
) = 1;
13654 DECL_DEFER_OUTPUT (decl1
) = 1;
13658 /* This is a definition, not a reference.
13659 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13660 if (!GNU_INLINE_P (decl1
))
13661 DECL_EXTERNAL (decl1
) = 0;
13663 if ((DECL_DECLARED_INLINE_P (decl1
)
13664 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13665 && ! DECL_INTERFACE_KNOWN (decl1
))
13666 DECL_DEFER_OUTPUT (decl1
) = 1;
13668 DECL_INTERFACE_KNOWN (decl1
) = 1;
13671 /* Determine the ELF visibility attribute for the function. We must not
13672 do this before calling "pushdecl", as we must allow "duplicate_decls"
13673 to merge any attributes appropriately. We also need to wait until
13675 if (!DECL_CLONED_FUNCTION_P (decl1
))
13676 determine_visibility (decl1
);
13678 if (!processing_template_decl
)
13679 maybe_instantiate_noexcept (decl1
);
13681 begin_scope (sk_function_parms
, decl1
);
13685 if (DECL_DESTRUCTOR_P (decl1
)
13686 || (DECL_CONSTRUCTOR_P (decl1
)
13687 && targetm
.cxx
.cdtor_returns_this ()))
13689 cdtor_label
= build_decl (input_location
,
13690 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13691 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13694 start_fname_decls ();
13696 store_parm_decls (current_function_parms
);
13702 /* Like start_preparsed_function, except that instead of a
13703 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13705 Returns true on success. If the DECLARATOR is not suitable
13706 for a function, we return false, which tells the parser to
13707 skip the entire function. */
13710 start_function (cp_decl_specifier_seq
*declspecs
,
13711 const cp_declarator
*declarator
,
13716 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13717 if (decl1
== error_mark_node
)
13719 /* If the declarator is not suitable for a function definition,
13720 cause a syntax error. */
13721 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13723 error ("invalid function declaration");
13727 if (DECL_MAIN_P (decl1
))
13728 /* main must return int. grokfndecl should have corrected it
13729 (and issued a diagnostic) if the user got it wrong. */
13730 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13731 integer_type_node
));
13733 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13736 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13740 use_eh_spec_block (tree fn
)
13742 return (flag_exceptions
&& flag_enforce_eh_specs
13743 && !processing_template_decl
13744 && !type_throw_all_p (TREE_TYPE (fn
))
13745 /* We insert the EH_SPEC_BLOCK only in the original
13746 function; then, it is copied automatically to the
13748 && !DECL_CLONED_FUNCTION_P (fn
)
13749 /* Implicitly-generated constructors and destructors have
13750 exception specifications. However, those specifications
13751 are the union of the possible exceptions specified by the
13752 constructors/destructors for bases and members, so no
13753 unallowed exception will ever reach this function. By
13754 not creating the EH_SPEC_BLOCK we save a little memory,
13755 and we avoid spurious warnings about unreachable
13757 && !DECL_DEFAULTED_FN (fn
));
13760 /* Store the parameter declarations into the current function declaration.
13761 This is called after parsing the parameter declarations, before
13762 digesting the body of the function.
13764 Also install to binding contour return value identifier, if any. */
13767 store_parm_decls (tree current_function_parms
)
13769 tree fndecl
= current_function_decl
;
13772 /* This is a chain of any other decls that came in among the parm
13773 declarations. If a parm is declared with enum {foo, bar} x;
13774 then CONST_DECLs for foo and bar are put here. */
13775 tree nonparms
= NULL_TREE
;
13777 if (current_function_parms
)
13779 /* This case is when the function was defined with an ANSI prototype.
13780 The parms already have decls, so we need not do anything here
13781 except record them as in effect
13782 and complain if any redundant old-style parm decls were written. */
13784 tree specparms
= current_function_parms
;
13787 /* Must clear this because it might contain TYPE_DECLs declared
13789 current_binding_level
->names
= NULL
;
13791 /* If we're doing semantic analysis, then we'll call pushdecl
13792 for each of these. We must do them in reverse order so that
13793 they end in the correct forward order. */
13794 specparms
= nreverse (specparms
);
13796 for (parm
= specparms
; parm
; parm
= next
)
13798 next
= DECL_CHAIN (parm
);
13799 if (TREE_CODE (parm
) == PARM_DECL
)
13801 if (DECL_NAME (parm
) == NULL_TREE
13802 || !VOID_TYPE_P (parm
))
13805 error ("parameter %qD declared void", parm
);
13809 /* If we find an enum constant or a type tag,
13810 put it aside for the moment. */
13811 TREE_CHAIN (parm
) = NULL_TREE
;
13812 nonparms
= chainon (nonparms
, parm
);
13816 /* Get the decls in their original chain order and record in the
13817 function. This is all and only the PARM_DECLs that were
13818 pushed into scope by the loop above. */
13819 DECL_ARGUMENTS (fndecl
) = getdecls ();
13822 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13824 /* Now store the final chain of decls for the arguments
13825 as the decl-chain of the current lexical scope.
13826 Put the enumerators in as well, at the front so that
13827 DECL_ARGUMENTS is not modified. */
13828 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13830 if (use_eh_spec_block (current_function_decl
))
13831 current_eh_spec_block
= begin_eh_spec_block ();
13835 /* We have finished doing semantic analysis on DECL, but have not yet
13836 generated RTL for its body. Save away our current state, so that
13837 when we want to generate RTL later we know what to do. */
13840 save_function_data (tree decl
)
13842 struct language_function
*f
;
13844 /* Save the language-specific per-function data so that we can
13845 get it back when we really expand this function. */
13846 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13849 f
= ggc_alloc
<language_function
> ();
13850 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13851 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13853 /* Clear out the bits we don't need. */
13854 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13855 f
->bindings
= NULL
;
13856 f
->x_local_names
= NULL
;
13857 f
->base
.local_typedefs
= NULL
;
13861 /* Set the return value of the constructor (if present). */
13864 finish_constructor_body (void)
13869 if (targetm
.cxx
.cdtor_returns_this ()
13870 && (! TYPE_FOR_JAVA (current_class_type
)))
13872 /* Any return from a constructor will end up here. */
13873 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13875 val
= DECL_ARGUMENTS (current_function_decl
);
13876 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13877 DECL_RESULT (current_function_decl
), val
);
13878 /* Return the address of the object. */
13879 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13880 add_stmt (exprstmt
);
13884 /* Do all the processing for the beginning of a destructor; set up the
13885 vtable pointers and cleanups for bases and members. */
13888 begin_destructor_body (void)
13890 tree compound_stmt
;
13892 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13893 issued an error message. We still want to try to process the
13894 body of the function, but initialize_vtbl_ptrs will crash if
13895 TYPE_BINFO is NULL. */
13896 if (COMPLETE_TYPE_P (current_class_type
))
13898 compound_stmt
= begin_compound_stmt (0);
13899 /* Make all virtual function table pointers in non-virtual base
13900 classes point to CURRENT_CLASS_TYPE's virtual function
13902 initialize_vtbl_ptrs (current_class_ptr
);
13903 finish_compound_stmt (compound_stmt
);
13905 /* Insert a cleanup to let the back end know that the object is dead
13906 when we exit the destructor, either normally or via exception. */
13907 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13908 tree clobber
= build_constructor (btype
, NULL
);
13909 TREE_THIS_VOLATILE (clobber
) = true;
13910 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13911 bref
= convert_from_reference (bref
);
13912 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13913 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13915 /* And insert cleanups for our bases and members so that they
13916 will be properly destroyed if we throw. */
13917 push_base_cleanups ();
13921 /* At the end of every destructor we generate code to delete the object if
13922 necessary. Do that now. */
13925 finish_destructor_body (void)
13929 /* Any return from a destructor will end up here; that way all base
13930 and member cleanups will be run when the function returns. */
13931 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13933 /* In a virtual destructor, we must call delete. */
13934 if (DECL_VIRTUAL_P (current_function_decl
))
13937 tree virtual_size
= cxx_sizeof (current_class_type
);
13941 At the point of definition of a virtual destructor (including
13942 an implicit definition), non-placement operator delete shall
13943 be looked up in the scope of the destructor's class and if
13944 found shall be accessible and unambiguous. */
13945 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13947 /*global_p=*/false,
13948 /*placement=*/NULL_TREE
,
13949 /*alloc_fn=*/NULL_TREE
,
13950 tf_warning_or_error
);
13952 if_stmt
= begin_if_stmt ();
13953 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13954 current_in_charge_parm
,
13957 finish_expr_stmt (exprstmt
);
13958 finish_then_clause (if_stmt
);
13959 finish_if_stmt (if_stmt
);
13962 if (targetm
.cxx
.cdtor_returns_this ())
13966 val
= DECL_ARGUMENTS (current_function_decl
);
13967 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13968 DECL_RESULT (current_function_decl
), val
);
13969 /* Return the address of the object. */
13970 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13971 add_stmt (exprstmt
);
13975 /* Do the necessary processing for the beginning of a function body, which
13976 in this case includes member-initializers, but not the catch clauses of
13977 a function-try-block. Currently, this means opening a binding level
13978 for the member-initializers (in a ctor), member cleanups (in a dtor),
13979 and capture proxies (in a lambda operator()). */
13982 begin_function_body (void)
13986 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13989 if (processing_template_decl
)
13990 /* Do nothing now. */;
13992 /* Always keep the BLOCK node associated with the outermost pair of
13993 curly braces of a function. These are needed for correct
13994 operation of dwarfout.c. */
13995 keep_next_level (true);
13997 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13999 if (processing_template_decl
)
14000 /* Do nothing now. */;
14001 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14002 begin_destructor_body ();
14007 /* Do the processing for the end of a function body. Currently, this means
14008 closing out the cleanups for fully-constructed bases and members, and in
14009 the case of the destructor, deleting the object if desired. Again, this
14010 is only meaningful for [cd]tors, since they are the only functions where
14011 there is a significant distinction between the main body and any
14012 function catch clauses. Handling, say, main() return semantics here
14013 would be wrong, as flowing off the end of a function catch clause for
14014 main() would also need to return 0. */
14017 finish_function_body (tree compstmt
)
14019 if (compstmt
== NULL_TREE
)
14022 /* Close the block. */
14023 finish_compound_stmt (compstmt
);
14025 if (processing_template_decl
)
14026 /* Do nothing now. */;
14027 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14028 finish_constructor_body ();
14029 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14030 finish_destructor_body ();
14033 /* Given a function, returns the BLOCK corresponding to the outermost level
14034 of curly braces, skipping the artificial block created for constructor
14038 outer_curly_brace_block (tree fndecl
)
14040 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
14041 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14042 /* Skip the artificial function body block. */
14043 block
= BLOCK_SUBBLOCKS (block
);
14047 /* If FNDECL is a class's key method, add the class to the list of
14048 keyed classes that should be emitted. */
14051 record_key_method_defined (tree fndecl
)
14053 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14054 && DECL_VIRTUAL_P (fndecl
)
14055 && !processing_template_decl
)
14057 tree fnclass
= DECL_CONTEXT (fndecl
);
14058 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14059 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14063 /* Subroutine of finish_function.
14064 Save the body of constexpr functions for possible
14065 future compile time evaluation. */
14068 maybe_save_function_definition (tree fun
)
14070 if (!processing_template_decl
14071 && DECL_DECLARED_CONSTEXPR_P (fun
)
14072 && !cp_function_chain
->invalid_constexpr
14073 && !DECL_CLONED_FUNCTION_P (fun
))
14074 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14077 /* Finish up a function declaration and compile that function
14078 all the way to assembler language output. The free the storage
14079 for the function definition.
14081 FLAGS is a bitwise or of the following values:
14083 We just finished processing the body of an in-class inline
14084 function definition. (This processing will have taken place
14085 after the class definition is complete.) */
14088 finish_function (int flags
)
14090 tree fndecl
= current_function_decl
;
14091 tree fntype
, ctype
= NULL_TREE
;
14092 int inclass_inline
= (flags
& 2) != 0;
14094 /* When we get some parse errors, we can end up without a
14095 current_function_decl, so cope. */
14096 if (fndecl
== NULL_TREE
)
14097 return error_mark_node
;
14099 if (c_dialect_objc ())
14100 objc_finish_function ();
14102 gcc_assert (!defer_mark_used_calls
);
14103 defer_mark_used_calls
= true;
14105 record_key_method_defined (fndecl
);
14107 fntype
= TREE_TYPE (fndecl
);
14109 /* TREE_READONLY (fndecl) = 1;
14110 This caused &foo to be of type ptr-to-const-function
14111 which then got a warning when stored in a ptr-to-function variable. */
14113 gcc_assert (building_stmt_list_p ());
14114 /* The current function is being defined, so its DECL_INITIAL should
14115 be set, and unless there's a multiple definition, it should be
14116 error_mark_node. */
14117 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14119 /* For a cloned function, we've already got all the code we need;
14120 there's no need to add any extra bits. */
14121 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14123 /* Make it so that `main' always returns 0 by default. */
14124 if (DECL_MAIN_P (current_function_decl
))
14125 finish_return_stmt (integer_zero_node
);
14127 if (use_eh_spec_block (current_function_decl
))
14128 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14129 (TREE_TYPE (current_function_decl
)),
14130 current_eh_spec_block
);
14133 /* If we're saving up tree structure, tie off the function now. */
14134 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14136 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14137 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14139 finish_fname_decls ();
14141 /* If this function can't throw any exceptions, remember that. */
14142 if (!processing_template_decl
14143 && !cp_function_chain
->can_throw
14144 && !flag_non_call_exceptions
14145 && !decl_replaceable_p (fndecl
))
14146 TREE_NOTHROW (fndecl
) = 1;
14148 /* This must come after expand_function_end because cleanups might
14149 have declarations (from inline functions) that need to go into
14150 this function's blocks. */
14152 /* If the current binding level isn't the outermost binding level
14153 for this function, either there is a bug, or we have experienced
14154 syntax errors and the statement tree is malformed. */
14155 if (current_binding_level
->kind
!= sk_function_parms
)
14157 /* Make sure we have already experienced errors. */
14158 gcc_assert (errorcount
);
14160 /* Throw away the broken statement tree and extra binding
14162 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14164 while (current_binding_level
->kind
!= sk_function_parms
)
14166 if (current_binding_level
->kind
== sk_class
)
14167 pop_nested_class ();
14169 poplevel (0, 0, 0);
14172 poplevel (1, 0, 1);
14174 /* Statements should always be full-expressions at the outermost set
14175 of curly braces for a function. */
14176 gcc_assert (stmts_are_full_exprs_p ());
14178 /* If there are no return statements in a function with auto return type,
14179 the return type is void. But if the declared type is something like
14180 auto*, this is an error. */
14181 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14182 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14184 if (!is_auto (current_function_auto_return_pattern
)
14185 && !current_function_returns_value
&& !current_function_returns_null
)
14187 error ("no return statements in function returning %qT",
14188 current_function_auto_return_pattern
);
14189 inform (input_location
, "only plain %<auto%> return type can be "
14190 "deduced to %<void%>");
14192 apply_deduced_return_type (fndecl
, void_type_node
);
14193 fntype
= TREE_TYPE (fndecl
);
14196 /* Save constexpr function body before it gets munged by
14197 the NRV transformation. */
14198 maybe_save_function_definition (fndecl
);
14200 /* Set up the named return value optimization, if we can. Candidate
14201 variables are selected in check_return_expr. */
14202 if (current_function_return_value
)
14204 tree r
= current_function_return_value
;
14207 if (r
!= error_mark_node
14208 /* This is only worth doing for fns that return in memory--and
14209 simpler, since we don't have to worry about promoted modes. */
14210 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14211 /* Only allow this for variables declared in the outer scope of
14212 the function so we know that their lifetime always ends with a
14213 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14214 we were to do this optimization in tree-ssa. */
14215 && (outer
= outer_curly_brace_block (fndecl
))
14216 && chain_member (r
, BLOCK_VARS (outer
)))
14217 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14219 current_function_return_value
= NULL_TREE
;
14222 /* Remember that we were in class scope. */
14223 if (current_class_name
)
14224 ctype
= current_class_type
;
14226 /* Must mark the RESULT_DECL as being in this function. */
14227 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14229 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14230 to the FUNCTION_DECL node itself. */
14231 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14233 /* Save away current state, if appropriate. */
14234 if (!processing_template_decl
)
14235 save_function_data (fndecl
);
14237 /* Complain if there's just no return statement. */
14238 if (warn_return_type
14239 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14240 && !dependent_type_p (TREE_TYPE (fntype
))
14241 && !current_function_returns_value
&& !current_function_returns_null
14242 /* Don't complain if we abort or throw. */
14243 && !current_function_returns_abnormally
14244 /* Don't complain if there's an infinite loop. */
14245 && !current_function_infinite_loop
14246 /* Don't complain if we are declared noreturn. */
14247 && !TREE_THIS_VOLATILE (fndecl
)
14248 && !DECL_NAME (DECL_RESULT (fndecl
))
14249 && !TREE_NO_WARNING (fndecl
)
14250 /* Structor return values (if any) are set by the compiler. */
14251 && !DECL_CONSTRUCTOR_P (fndecl
)
14252 && !DECL_DESTRUCTOR_P (fndecl
)
14253 && targetm
.warn_func_return (fndecl
))
14255 warning (OPT_Wreturn_type
,
14256 "no return statement in function returning non-void");
14257 TREE_NO_WARNING (fndecl
) = 1;
14260 /* Store the end of the function, so that we get good line number
14261 info for the epilogue. */
14262 cfun
->function_end_locus
= input_location
;
14264 /* Complain about parameters that are only set, but never otherwise used. */
14265 if (warn_unused_but_set_parameter
14266 && !processing_template_decl
14267 && errorcount
== unused_but_set_errorcount
14268 && !DECL_CLONED_FUNCTION_P (fndecl
))
14272 for (decl
= DECL_ARGUMENTS (fndecl
);
14274 decl
= DECL_CHAIN (decl
))
14275 if (TREE_USED (decl
)
14276 && TREE_CODE (decl
) == PARM_DECL
14277 && !DECL_READ_P (decl
)
14278 && DECL_NAME (decl
)
14279 && !DECL_ARTIFICIAL (decl
)
14280 && !TREE_NO_WARNING (decl
)
14281 && !DECL_IN_SYSTEM_HEADER (decl
)
14282 && TREE_TYPE (decl
) != error_mark_node
14283 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14284 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14285 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14286 warning (OPT_Wunused_but_set_parameter
,
14287 "parameter %q+D set but not used", decl
);
14288 unused_but_set_errorcount
= errorcount
;
14291 /* Complain about locally defined typedefs that are not used in this
14293 maybe_warn_unused_local_typedefs ();
14295 /* Genericize before inlining. */
14296 if (!processing_template_decl
)
14298 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14299 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14300 cp_genericize (fndecl
);
14301 /* Clear out the bits we don't need. */
14302 f
->x_current_class_ptr
= NULL
;
14303 f
->x_current_class_ref
= NULL
;
14304 f
->x_eh_spec_block
= NULL
;
14305 f
->x_in_charge_parm
= NULL
;
14306 f
->x_vtt_parm
= NULL
;
14307 f
->x_return_value
= NULL
;
14308 f
->bindings
= NULL
;
14309 f
->extern_decl_map
= NULL
;
14310 f
->infinite_loops
= NULL
;
14312 /* Clear out the bits we don't need. */
14313 local_names
= NULL
;
14315 /* We're leaving the context of this function, so zap cfun. It's still in
14316 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14318 current_function_decl
= NULL
;
14320 /* If this is an in-class inline definition, we may have to pop the
14321 bindings for the template parameters that we added in
14322 maybe_begin_member_template_processing when start_function was
14324 if (inclass_inline
)
14325 maybe_end_member_template_processing ();
14327 /* Leave the scope of the class. */
14329 pop_nested_class ();
14334 current_function_decl
= NULL_TREE
;
14336 defer_mark_used_calls
= false;
14337 if (deferred_mark_used_calls
)
14342 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14344 vec_free (deferred_mark_used_calls
);
14350 /* Create the FUNCTION_DECL for a function definition.
14351 DECLSPECS and DECLARATOR are the parts of the declaration;
14352 they describe the return type and the name of the function,
14353 but twisted together in a fashion that parallels the syntax of C.
14355 This function creates a binding context for the function body
14356 as well as setting up the FUNCTION_DECL in current_function_decl.
14358 Returns a FUNCTION_DECL on success.
14360 If the DECLARATOR is not suitable for a function (it defines a datum
14361 instead), we return 0, which tells yyparse to report a parse error.
14363 May return void_type_node indicating that this method is actually
14364 a friend. See grokfield for more details.
14366 Came here with a `.pushlevel' .
14368 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14369 CHANGES TO CODE IN `grokfield'. */
14372 grokmethod (cp_decl_specifier_seq
*declspecs
,
14373 const cp_declarator
*declarator
, tree attrlist
)
14375 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14378 if (fndecl
== error_mark_node
)
14379 return error_mark_node
;
14381 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14383 error ("invalid member function declaration");
14384 return error_mark_node
;
14388 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14390 /* Pass friends other than inline friend functions back. */
14391 if (fndecl
== void_type_node
)
14394 if (DECL_IN_AGGR_P (fndecl
))
14396 if (DECL_CLASS_SCOPE_P (fndecl
))
14397 error ("%qD is already defined in class %qT", fndecl
,
14398 DECL_CONTEXT (fndecl
));
14399 return error_mark_node
;
14402 check_template_shadow (fndecl
);
14404 DECL_COMDAT (fndecl
) = 1;
14405 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14406 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14408 /* We process method specializations in finish_struct_1. */
14409 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14411 fndecl
= push_template_decl (fndecl
);
14412 if (fndecl
== error_mark_node
)
14416 if (! DECL_FRIEND_P (fndecl
))
14418 if (DECL_CHAIN (fndecl
))
14420 fndecl
= copy_node (fndecl
);
14421 TREE_CHAIN (fndecl
) = NULL_TREE
;
14425 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14427 DECL_IN_AGGR_P (fndecl
) = 1;
14432 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14433 we can lay it out later, when and if its type becomes complete.
14435 Also handle constexpr variables where the initializer involves
14436 an unlowered PTRMEM_CST because the class isn't complete yet. */
14439 maybe_register_incomplete_var (tree var
)
14441 gcc_assert (VAR_P (var
));
14443 /* Keep track of variables with incomplete types. */
14444 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14445 && DECL_EXTERNAL (var
))
14447 tree inner_type
= TREE_TYPE (var
);
14449 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14450 inner_type
= TREE_TYPE (inner_type
);
14451 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14453 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14454 /* RTTI TD entries are created while defining the type_info. */
14455 || (TYPE_LANG_SPECIFIC (inner_type
)
14456 && TYPE_BEING_DEFINED (inner_type
)))
14458 incomplete_var iv
= {var
, inner_type
};
14459 vec_safe_push (incomplete_vars
, iv
);
14461 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14462 && decl_constant_var_p (var
)
14463 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14465 /* When the outermost open class is complete we can resolve any
14466 pointers-to-members. */
14467 tree context
= outermost_open_class ();
14468 incomplete_var iv
= {var
, context
};
14469 vec_safe_push (incomplete_vars
, iv
);
14474 /* Called when a class type (given by TYPE) is defined. If there are
14475 any existing VAR_DECLs whose type has been completed by this
14476 declaration, update them now. */
14479 complete_vars (tree type
)
14482 incomplete_var
*iv
;
14484 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14486 if (same_type_p (type
, iv
->incomplete_type
))
14488 tree var
= iv
->decl
;
14489 tree type
= TREE_TYPE (var
);
14491 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14492 == iv
->incomplete_type
)
14494 /* Complete the type of the variable. The VAR_DECL itself
14495 will be laid out in expand_expr. */
14496 complete_type (type
);
14497 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14500 if (DECL_INITIAL (var
)
14501 && decl_constant_var_p (var
))
14502 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14504 /* Remove this entry from the list. */
14505 incomplete_vars
->unordered_remove (ix
);
14511 /* Check for pending declarations which may have abstract type. */
14512 complete_type_check_abstract (type
);
14515 /* If DECL is of a type which needs a cleanup, build and return an
14516 expression to perform that cleanup here. Return NULL_TREE if no
14517 cleanup need be done. */
14520 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14526 /* Assume no cleanup is required. */
14527 cleanup
= NULL_TREE
;
14529 if (error_operand_p (decl
))
14532 /* Handle "__attribute__((cleanup))". We run the cleanup function
14533 before the destructor since the destructor is what actually
14534 terminates the lifetime of the object. */
14535 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14542 /* Get the name specified by the user for the cleanup function. */
14543 id
= TREE_VALUE (TREE_VALUE (attr
));
14544 /* Look up the name to find the cleanup function to call. It is
14545 important to use lookup_name here because that is what is
14546 used in c-common.c:handle_cleanup_attribute when performing
14547 initial checks on the attribute. Note that those checks
14548 include ensuring that the function found is not an overloaded
14549 function, or an object with an overloaded call operator,
14550 etc.; we can rely on the fact that the function found is an
14551 ordinary FUNCTION_DECL. */
14552 fn
= lookup_name (id
);
14553 arg
= build_address (decl
);
14555 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14556 if (cleanup
== error_mark_node
)
14557 return error_mark_node
;
14559 /* Handle ordinary C++ destructors. */
14560 type
= TREE_TYPE (decl
);
14561 if (type_build_dtor_call (type
))
14563 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14567 if (TREE_CODE (type
) == ARRAY_TYPE
)
14570 addr
= build_address (decl
);
14572 call
= build_delete (TREE_TYPE (addr
), addr
,
14573 sfk_complete_destructor
, flags
, 0, complain
);
14574 if (call
== error_mark_node
)
14575 cleanup
= error_mark_node
;
14576 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14577 /* Discard the call. */;
14579 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14584 /* build_delete sets the location of the destructor call to the
14585 current location, even though the destructor is going to be
14586 called later, at the end of the current scope. This can lead to
14587 a "jumpy" behaviour for users of debuggers when they step around
14588 the end of the block. So let's unset the location of the
14589 destructor call instead. */
14590 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14591 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14594 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14595 /* Treat objects with destructors as used; the destructor may do
14596 something substantive. */
14603 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14604 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14605 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14608 static_fn_type (tree memfntype
)
14613 if (TYPE_PTRMEMFUNC_P (memfntype
))
14614 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14615 if (POINTER_TYPE_P (memfntype
)
14616 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14617 memfntype
= TREE_TYPE (memfntype
);
14618 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14620 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14621 args
= TYPE_ARG_TYPES (memfntype
);
14622 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14623 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14624 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14625 fntype
= (cp_build_type_attribute_variant
14626 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14627 fntype
= (build_exception_variant
14628 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14629 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14630 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14634 /* DECL was originally constructed as a non-static member function,
14635 but turned out to be static. Update it accordingly. */
14638 revert_static_member_fn (tree decl
)
14640 tree stype
= static_fn_type (decl
);
14641 cp_cv_quals quals
= type_memfn_quals (stype
);
14642 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14644 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14645 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14647 TREE_TYPE (decl
) = stype
;
14649 if (DECL_ARGUMENTS (decl
))
14650 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14651 DECL_STATIC_FUNCTION_P (decl
) = 1;
14654 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14655 one of the language-independent trees. */
14657 enum cp_tree_node_structure_enum
14658 cp_tree_node_structure (union lang_tree_node
* t
)
14660 switch (TREE_CODE (&t
->generic
))
14662 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14663 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14664 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14665 case OVERLOAD
: return TS_CP_OVERLOAD
;
14666 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14667 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14668 case BASELINK
: return TS_CP_BASELINK
;
14669 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14670 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14671 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14672 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14673 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14674 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14675 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14676 default: return TS_CP_GENERIC
;
14680 /* Build the void_list_node (void_type_node having been created). */
14682 build_void_list_node (void)
14684 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14689 cp_missing_noreturn_ok_p (tree decl
)
14691 /* A missing noreturn is ok for the `main' function. */
14692 return DECL_MAIN_P (decl
);
14695 /* Return the decl used to identify the COMDAT group into which DECL should
14699 cxx_comdat_group (tree decl
)
14701 /* Virtual tables, construction virtual tables, and virtual table
14702 tables all go in a single COMDAT group, named after the primary
14704 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14705 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14706 /* For all other DECLs, the COMDAT group is the mangled name of the
14707 declaration itself. */
14710 while (DECL_THUNK_P (decl
))
14712 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14713 into the same section as the target function. In that case
14714 we must return target's name. */
14715 tree target
= THUNK_TARGET (decl
);
14716 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14717 && DECL_SECTION_NAME (target
) != NULL
14718 && DECL_ONE_ONLY (target
))
14728 /* Returns the return type for FN as written by the user, which may include
14729 a placeholder for a deduced return type. */
14732 fndecl_declared_return_type (tree fn
)
14734 fn
= STRIP_TEMPLATE (fn
);
14735 if (FNDECL_USED_AUTO (fn
))
14737 struct language_function
*f
= NULL
;
14738 if (DECL_STRUCT_FUNCTION (fn
))
14739 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14741 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14742 return f
->x_auto_return_pattern
;
14744 return TREE_TYPE (TREE_TYPE (fn
));
14747 /* Returns true iff DECL was declared with an auto return type and it has
14748 not yet been deduced to a real type. */
14751 undeduced_auto_decl (tree decl
)
14753 if (cxx_dialect
< cxx14
)
14755 return type_uses_auto (TREE_TYPE (decl
));
14758 /* Complain if DECL has an undeduced return type. */
14761 require_deduced_type (tree decl
)
14763 if (undeduced_auto_decl (decl
))
14764 error ("use of %qD before deduction of %<auto%>", decl
);
14767 #include "gt-cp-decl.h"