19 lines
449 B
Idris
19 lines
449 B
Idris
module Data.Profunctor.Mapping
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import Data.Profunctor
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import Data.Profunctor.Traversing
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%default total
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public export
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interface (Traversing p, Closed p) => Mapping p where
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map' : Functor f => p a b -> p (f a) (f b)
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map' = roam map
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roam : ((a -> b) -> s -> t) -> p a b -> p s t
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roam f = dimap (flip f) ($ id) . map' @{%search} @{functor}
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where
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functor : Functor (\a => (a -> b) -> t)
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functor = MkFunctor (\f => (. (. f)))
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