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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)
[abstract
[monoid (.only Monoid)]]]])
(def .public identity
(All (_ a) (-> a a))
(|>>))
(def .public (composite f g)
(All (_ a b c)
(-> (-> b c) (-> a b) (-> a c)))
(|>> g f))
(def .public (constant value)
(All (_ o) (-> o (All (_ i) (-> i o))))
(function (_ _) value))
(def .public (flipped f)
(All (_ a b c)
(-> (-> a b c) (-> b a c)))
(function (_ x y) (f y x)))
(def .public (on input function)
(All (_ i o)
(-> i (-> i o) o))
(function input))
(def .public monoid
(All (_ a) (Monoid (-> a a)))
(implementation
(def identity ..identity)
(def composite ..composite)))
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