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| ANSI Common Lisp 14 Conses 14.2 Dictionary of Conses
14.2.17 listp | Function
  Syntax: listp object generalized-boolean Arguments and Values: object - an object. generalized-boolean - a generalized boolean. Description: Returns true if object is of type list; otherwise, returns false. Examples:
       (listp nil)  true
       (listp (cons 1 2))  true
       (listp (make-array 6))  false
       (listp t)  false
  See Also: consp Notes: If object is a cons, listp does not check whether object is a proper list; it returns true for any kind of list.
       (listp object) ==(typep object 'list) ==(typep object '(or cons null))
Allegro CL Implementation Details: None.

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