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  ANSI Common Lisp   13 Characters   13.2 Dictionary of Characters

13.2.7 characterp Function

Syntax:
characterp object    generalized-boolean

Arguments and Values:
object - an object.

generalized-boolean - a generalized boolean.

Description:
Returns true if object is of type character; otherwise, returns false.

Examples:
 (characterp #\a)  true
 (characterp 'a)  false
 (characterp "a")  false
 (characterp 65.)  false
 (characterp #\Newline)  true
 ;; This next example presupposes an implementation 
 ;; in which #\Rubout is an implementation-defined character.
 (characterp #\Rubout)  true

See Also:
character (type and function), typep

Notes:
 (characterp object) ==(typep object 'character)

Allegro CL Implementation Details:
None.

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© Franz Inc. 1998-2017 - File last updated 01-11-2017