Syntax:
functionp object => generalized-boolean
Arguments and Values:
object---an object.
generalized-boolean---a generalized boolean.
Description:
Returns true if object is of type function; otherwise, returns false.
Examples:
(functionp 'append) => false (functionp #'append) => true (functionp (symbol-function 'append)) => true (flet ((f () 1)) (functionp #'f)) => true (functionp (compile nil '(lambda () 259))) => true (functionp nil) => false (functionp 12) => false (functionp '(lambda (x) (* x x))) => false (functionp #'(lambda (x) (* x x))) => true
Side Effects: None.
Affected By: None.
Exceptional Situations: None.
See Also: None.
Notes:
(functionp object) == (typep object 'function)