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(.module:
[library
[lux #*
[abstract
[functor (#+ Functor)]
[apply (#+ Apply)]
[monad (#+ Monad)]
[comonad (#+ CoMonad)]]
[control
["." function]]]])
(type: .public (Identity a)
{#.doc (doc "A value, as is, without any extra structure super-imposed on it.")}
a)
(implementation: .public functor
(Functor Identity)
(def: map function.identity))
(implementation: .public apply
(Apply Identity)
(def: &functor ..functor)
(def: (apply ff fa) (ff fa)))
(implementation: .public monad
(Monad Identity)
(def: &functor ..functor)
(def: in function.identity)
(def: join function.identity))
(implementation: .public comonad
(CoMonad Identity)
(def: &functor ..functor)
(def: out function.identity)
(def: split function.identity))
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