Tests whether a character represents white space.
lispworks
whitespace-char-p char => bool
char
A character.
bool
t if char represents white space; nil otherwise.
t
nil
This predicate recognizes [whitespace1] , as described in the standard:
[whitespace1]
"Space and non-graphic characters that only moved the print position."
If sys:*extended-spaces* is t , U+3000 Ideographic Space is also considered whitespace.
sys:*extended-spaces*
*extended-spaces*
LispWorks User Guide and Reference Manual - 21 Dec 2011