The predicate for simple characters. simple-char-p is deprecated.
simple-char-p
lispworks
simple-char-p object => result
object
The object to be tested.
result
A boolean.
The function simple-char-p is the predicate for simple characters.
result is t if object is a simple character, and nil otherwise.
t
nil
simple-char
LispWorks User Guide and Reference Manual - 20 Sep 2017