object—an object.
generalized-boolean—a generalized boolean.
Returns true if object is of type simple-vector
;
otherwise, returns false..
(simple-vector-p (make-array 6)) → true (simple-vector-p "aaaaaa") → false (simple-vector-p (make-array 6 :fill-pointer t)) → false
(simple-vector-p object) ≡ (typep object 'simple-vector)