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ANSI Common Lisp 13 Characters 13.2 Dictionary of Characters
13.2.9 alphanumericp |
Function |
- Syntax:
-
alphanumericp
character
generalized-boolean
- Arguments and Values:
-
character - a character.
generalized-boolean - a generalized boolean.
- Description:
-
Returns true if character is an alphabetic1 character
or a numeric character; otherwise, returns false.
- Examples:
-
(alphanumericp #\Z) true
(alphanumericp #\9) true
(alphanumericp #\Newline) false
(alphanumericp #\#) false
- Affected By:
-
None.
(In particular, the results of this predicate are independent
of any special syntax which might have been enabled in the current readtable.)
- Exceptional Situations:
-
Should signal an error of type type-error if character is not a character.
- See Also:
-
alpha-char-p, graphic-char-p, digit-char-p
- Notes:
-
Alphanumeric characters are graphic
as defined by graphic-char-p.
The alphanumeric characters are a subset of the graphic characters.
The standard characters A through Z,
a through z,
and 0 through 9 are alphanumeric characters.
(alphanumericp x)
==(or (alpha-char-p x) (not (null (digit-char-p x))))
- Allegro CL Implementation Details:
-
None.
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