semantics.c (finish_pseudo_destructor_expr): Allow differing cv-qualification between...

semantics.c (finish_pseudo_destructor_expr): Allow differing cv-qualification between the type named by the...

	* semantics.c (finish_pseudo_destructor_expr): Allow differing
	cv-qualification between the type named by the
	pseudo-destructor-name and the object-type.

	* search.c (accessible_base_p): Handle non-proper bases.

	* name-lookup.c (do_nonmember_using_decl): If a using declaration
	refers to a single overloaded function, set the type of the
	function.
	* tree.c (lvalue_type): Simplify.
	* typeck.c (type_unknown_p): Do not assume all OVERLOADs have an
	unknown type.
	(build_unary_op): Handle OVERLOADs with known types.

	* decl.c (duplicate_decls): Do not destroy DECL_ARGUMENTS for
	function templates.

	* parser.c (cp_parser_postfix_expression): Handle the use of
	"typename" in non-dependent contexts.  Convert appropriately when
	when using a qualified name after "->" or ".".

	* call.c (conditional_conversion): Honor the requirement that some
	conversions refer to the original object.

	* g++.dg/expr/dtor2.C: New test.

	* g++.dg/lookup/anon4.C: New test.

	* g++.dg/overload/using1.C: New test.

	* g++.dg/template/lookup7.C: New test.

	* g++.dg/template/typename6.C: New test.

	* g++.dg/expr/cond6.C: New test.

From-SVN: r79671