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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
(../eq #as E))
## [Signatures]
(defsig #export (Ord a)
(: (E;Eq a)
_eq)
(do-template [<name>]
[(: (-> a a Bool) <name>)]
[<] [<=] [>] [>=]))
## [Constructors]
(def #export (ord$ eq < >)
(All [a]
(-> (E;Eq a) (-> a a Bool) (-> a a Bool) (Ord a)))
(struct
(def _eq eq)
(def < <)
(def (<= x y)
(or (< x y)
(:: eq (E;= x y))))
(def > >)
(def (>= x y)
(or (> x y)
(:: eq (E;= x y))))))
## [Functions]
(do-template [<name> <op>]
[(def #export (<name> ord x y)
(All [a]
(-> (Ord a) a a a))
(if (:: ord (<op> x y)) x y))]
[max ;;>]
[min ;;<])
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