alphanumericp [Function]

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::

section alpha-char-p [Function] , section graphic-char-p [Function] , section digit-char-p [Function]

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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