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(.module:
[library
[lux "*"
["@" target]
[abstract
[functor {"+" [Functor]}]
[apply {"+" [Apply]}]
[monad {"+" [Monad do]}]]
[control
["[0]" io {"+" [IO]}]]
[data
[collection
["[0]" array {"+" [Array]}]]]
[type
abstract]]])
(type: .public (Thread ! a)
(-> ! a))
(abstract: .public (Box t v)
(Array v)
[(def: .public (box init)
(All (_ a) (-> a (All (_ !) (Thread ! (Box ! a)))))
(function (_ !)
(|> (array.empty 1)
(array.write! 0 init)
:abstraction)))
(def: .public (read! box)
(All (_ ! a) (-> (Box ! a) (Thread ! a)))
(function (_ !)
(for {@.old
("jvm aaload" (:representation box) 0)
@.jvm
("jvm array read object"
(|> 0
(:as (primitive "java.lang.Long"))
"jvm object cast"
"jvm conversion long-to-int")
(:representation box))
@.js ("js array read" 0 (:representation box))
@.python ("python array read" 0 (:representation box))
@.lua ("lua array read" 0 (:representation box))
@.ruby ("ruby array read" 0 (:representation box))
@.php ("php array read" 0 (:representation box))
@.scheme ("scheme array read" 0 (:representation box))})))
(def: .public (write! value box)
(All (_ a) (-> a (All (_ !) (-> (Box ! a) (Thread ! Any)))))
(function (_ !)
(|> box :representation (array.write! 0 value) :abstraction)))]
)
(def: .public (result thread)
(All (_ a)
(-> (All (_ !) (Thread ! a))
a))
(thread []))
(def: .public io
(All (_ a)
(-> (All (_ !) (Thread ! a))
(IO a)))
(|>> ..result io.io))
(implementation: .public functor
(All (_ !) (Functor (Thread !)))
(def: (each f)
(function (_ fa)
(function (_ !)
(f (fa !))))))
(implementation: .public apply
(All (_ !) (Apply (Thread !)))
(def: &functor ..functor)
(def: (on fa ff)
(function (_ !)
((ff !) (fa !)))))
(implementation: .public monad
(All (_ !) (Monad (Thread !)))
(def: &functor ..functor)
(def: (in value)
(function (_ !)
value))
(def: (conjoint ffa)
(function (_ !)
((ffa !) !))))
(def: .public (update! f box)
(All (_ a !) (-> (-> a a) (Box ! a) (Thread ! a)))
(do ..monad
[old (read! box)
_ (write! (f old) box)]
(in old)))
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