char-set-diff+intersection

[procedure] char-set-diff+intersection cset0 cset1 ...

[procedure] char-set-diff+intersection! cset0 cset1 cset3 ...

SRFI-14: Returns two values, as shown below.

(values (char-set-difference cset0 cset1 ...)
        (char-set-intersection cset0 (char-set-union cset1 ...)))

char-set-diff+intersection! may modify both cset0 and cset1. See also char-set-difference, char-set-intersection.