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ANSI Common Lisp  5 Data and Control Flow 5.3 Dictionary of Data and Control Flow
| 5.3.10 functionp |
Function |
- Syntax:
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functionp
object
 generalized-boolean
- Arguments and Values:
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object - an object.
generalized-boolean - a generalized boolean.
- Description:
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Returns true if object is of type function; otherwise, returns false.
- Examples:
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(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
- Notes:
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(functionp object) ==(typep object 'function)
- Allegro CL Implementation Details:
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None.
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