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alphanumericp (Function)

— Function: alphanumericp character generalized-boolean
Arguments and Values:

character—a character.

generalized-boolean—a generalized boolean.


Returns true if character is an alphabetic1 character or a numeric character; otherwise, returns false.

 (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


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))))