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DR 337 PR c++/9256

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DR 337
	PR c++/9256
	* pt.c (tsubst): Substitution must fail if we are attempting to
	create an array with element type that is an abstract class type.
	* decl.c (cp_finish_decl): Strip pointers and array types recursively
	before calling abstract_virtuals_error.

From-SVN: r75618
This commit is contained in:
Giovanni Bajo 2004-01-10 01:18:08 +00:00
parent f88e471576
commit cfb91b67b8
3 changed files with 30 additions and 2 deletions
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9
gcc/cp/ChangeLog
View File

@ -1,3 +1,12 @@
2004-01-10 Giovanni Bajo <giovannibajo@gcc.gnu.org>
DR 337
PR c++/9256
* pt.c (tsubst): Substitution must fail if we are attempting to
create an array with element type that is an abstract class type.
* decl.c (cp_finish_decl): Strip pointers and array types recursively
before calling abstract_virtuals_error.
2004-01-09 Alexandre Oliva <aoliva@redhat.com>
* name-lookup.c (qualified_lookup_using_namespace): Consider

13
gcc/cp/decl.c
View File

@ -4879,8 +4879,19 @@ cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
|| TREE_CODE (type) == METHOD_TYPE)
abstract_virtuals_error (decl,
strip_array_types (TREE_TYPE (type)));
else if (POINTER_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE)
{
/* If it's either a pointer or an array type, strip through all
of them but the last one. If the last is an array type, issue
an error if the element type is abstract. */
while (POINTER_TYPE_P (TREE_TYPE (type))
|| TREE_CODE (TREE_TYPE (type)) == ARRAY_TYPE)
type = TREE_TYPE (type);
if (TREE_CODE (type) == ARRAY_TYPE)
abstract_virtuals_error (decl, TREE_TYPE (type));
}
else
abstract_virtuals_error (decl, strip_array_types (type));
abstract_virtuals_error (decl, type);
if (TREE_CODE (decl) == FUNCTION_DECL
|| TREE_TYPE (decl) == error_mark_node)

10
gcc/cp/pt.c
View File

@ -6975,7 +6975,8 @@ tsubst (tree t, tree args, tsubst_flags_t complain, tree in_decl)
The deduction may fail for any of the following reasons:
-- Attempting to create an array with an element type that
is void, a function type, or a reference type. */
is void, a function type, or a reference type, or [DR337]
an abstract class type. */
if (TREE_CODE (type) == VOID_TYPE
|| TREE_CODE (type) == FUNCTION_TYPE
|| TREE_CODE (type) == REFERENCE_TYPE)
@ -6984,6 +6985,13 @@ tsubst (tree t, tree args, tsubst_flags_t complain, tree in_decl)
error ("creating array of `%T'", type);
return error_mark_node;
}
if (CLASS_TYPE_P (type) && CLASSTYPE_PURE_VIRTUALS (type))
{
if (complain & tf_error)
error ("creating array of `%T', which is an abstract class type",
type);
return error_mark_node;
}
r = build_cplus_array_type (type, domain);
return r;