Syntax:
alphanumericp character => generalized-boolean
Arguments and Values:
character---a character.
generalized-boolean---a generalized boolean.
Description:
Returns true if character is an alphabetic[1] 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))))
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