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(;module:
lux
(lux (control monad)
(data ["E" error])))
## [Signatures]
(sig: #export (Codec m a)
{#;doc "A way to move back-and-forth between a type and an alternative representation for it."}
(: (-> a m)
encode)
(: (-> m (E;Error a))
decode))
## [Values]
(struct: #export (compose Codec<c,b> Codec<b,a>)
{#;doc "Codec composition."}
(All [a b c]
(-> (Codec c b) (Codec b a)
(Codec c a)))
(def: encode
(|>. (:: Codec<b,a> encode)
(:: Codec<c,b> encode)))
(def: (decode cy)
(do E;Monad<Error>
[by (:: Codec<c,b> decode cy)]
(:: Codec<b,a> decode by)))
)
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