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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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