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## Copyright (c) Eduardo Julian. All rights reserved.
## The use and distribution terms for this software are covered by the
## Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
## which can be found in the file epl-v10.html at the root of this distribution.
## By using this software in any fashion, you are agreeing to be bound by
## the terms of this license.
## You must not remove this notice, or any other, from this software.
(;import (lux #refer (#exclude Reader))
(lux/control (functor #as F #refer #all)
(monad #as M #refer #all)))
## [Types]
(deftype #export (Reader r a)
(-> r a))
## [Structures]
(defstruct #export Reader/Functor (All [r]
(Functor (Reader r)))
(def (F;map f fa)
(lambda [env]
(f (fa env)))))
(defstruct #export Reader/Monad (All [r]
(Monad (Reader r)))
(def M;_functor Reader/Functor)
(def (M;wrap x)
(lambda [env] x))
(def (M;join mma)
(lambda [env]
(mma env env))))
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