sets using srfi-113 added by fmnt on Mon Dec 3 09:38:52 2018
(require-extension srfi-113 srfi-128) (set-adjoin (set (make-equal-comparator) 0) (set (make-equal-comparator) 1))
(require-extension srfi-113 srfi-128) (set-adjoin (set (make-equal-comparator) 0) (set (make-equal-comparator) 1))