- enum-set-difference enum-set-1 enum-set-2procedure
- enum-set-difference! enum-set-1 enum-set-2procedure
Returns an enum set containing the elements of enum-set-1 but not enum-set-2. It is an error if all the elements of the result do not belong to the same enum type.
(enum-set=? ~reddish (enum-set-difference color-set reddish)) ⇒ #t