#-sb-xc (declare (type sb!xc:class new-value))
(ecase (info :type :kind name)
((nil))
+ (:forthcoming-defclass-type
+ ;; XXX Currently, nothing needs to be done in this case. Later, when
+ ;; PCL is integrated tighter into SBCL, this might need more work.
+ nil)
(:instance
(let ((old (class-of (sb!xc:find-class name)))
(new (class-of new-value)))