chickadee » srfi-209 » enum-set-delete-all

Returns an enum set that contains the members of enum-set excluding the members of list.

(define empty-colors
  (enum-set-delete-all color-set (enum-set->enum-list color-set)))

(enum-set<? empty-colors reddish) ⇒ #t
(enum-set-empty? empty-colors) ⇒ #t