* cp-tree.def (UNBOUND_CLASS_TEMPLATE): New tree node.
	* cp-tree.h (make_unbound_class_template): Prototype new function.
	* decl.c (make_unbound_class_template): New function.
	* decl2.c (arg_assoc_template_arg): Handle UNBOUND_CLASS_TEMPLATE.
	* error.c (dump_type): Likewise.
	* mangle.c (write_type): Likewise.
	* parse.y (template_parm): Likewise.
	(template_argument): Use make_unbound_class_template.
	* pt.c (convert_template_argument): Handle UNBOUND_CLASS_TEMPLATE.
	(tsubst): Likewise.
	(tsubst_copy): Likewise.
	(unify): Likewise.
	* tree.c (walk_tree): Likewise.
	* typeck.c (comptypes): Likewise.

From-SVN: r46430