;; the primitive type restriction applied to each extra argument or
;; result following the fixed operands. If NIL, no extra
;; args/results are allowed. Otherwise, either * or a (:OR ...) list
;; the primitive type restriction applied to each extra argument or
;; result following the fixed operands. If NIL, no extra
;; args/results are allowed. Otherwise, either * or a (:OR ...) list