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... This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
... If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
(.require
[library
[lux (.except)]]
[//
[functor
["[0]" contravariant]]])
(type .public (Equivalence a)
(Interface
(is (-> a a Bit)
=)))
(def .public (rec sub)
(All (_ a)
(-> (-> (Equivalence a) (Equivalence a)) (Equivalence a)))
(implementation
(def (= left right)
(sub = left right))))
(def .public functor
(contravariant.Functor Equivalence)
(implementation
(def (each f equivalence)
(implementation
(def (= reference sample)
(of equivalence = (f reference) (f sample)))))))
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