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## Copyright (c) Eduardo Julian. All rights reserved.
## 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 http://mozilla.org/MPL/2.0/.
(;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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