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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 #as F)
(monad #as M)))
(.. list
(text #as T #open ("text:" Text/Monoid))))
## [Types]
(deftype #export (IO a)
(-> (,) a))
## [Syntax]
(defmacro #export (io tokens state)
(case tokens
(\ (list value))
(let [blank (symbol$ ["" ""])]
(#;Right [state (list (` (_lux_lambda (~ blank) (~ blank) (~ value))))]))
_
(#;Left "Wrong syntax for io")))
## [Structures]
(defstruct #export IO/Functor (F;Functor IO)
(def (F;map f ma)
(io (f (ma [])))))
(defstruct #export IO/Monad (M;Monad IO)
(def M;_functor IO/Functor)
(def (M;wrap x)
(io x))
(def (M;join mma)
(mma [])))
## [Functions]
(def #export (print x)
(-> Text (IO (,)))
(io (_jvm_invokevirtual "java.io.PrintStream" "print" ["java.lang.Object"]
(_jvm_getstatic "java.lang.System" "out") [x])))
(def #export (println x)
(-> Text (IO (,)))
(io (_jvm_invokevirtual "java.io.PrintStream" "println" ["java.lang.Object"]
(_jvm_getstatic "java.lang.System" "out") [x])))
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