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.
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