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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
(lux (meta macro
ast)
(control functor
monad)
(data list))
(.. function))
## [Types]
(deftype #export (Lazy a)
(All [b]
(-> (-> a b) b)))
## [Syntax]
(defmacro #export (... tokens state)
(case tokens
(\ (list value))
(let [blank (symbol$ ["" ""])]
(#;Right [state (list (` (;lambda [(~ blank)] ((~ blank) (~ value)))))]))
_
(#;Left "Wrong syntax for ...")))
## [Functions]
(def #export (! thunk)
(All [a]
(-> (Lazy a) a))
(thunk id))
## [Structs]
(defstruct #export Lazy/Functor (Functor Lazy)
(def (map f ma)
(lambda [k] (ma (. k f)))))
(defstruct #export Lazy/Monad (Monad Lazy)
(def _functor Lazy/Functor)
(def (wrap a)
(... a))
(def join !))
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