Safe Haskell | Safe-Inferred |
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# Documentation

type Lens s t a b = forall f. Functor f => (a -> f b) -> s -> f tSource

A type alias of the lens. It is the same definition as the lens which introduced in http://hackage.haskell.org/package/lens-4.3.3/docs/Control-Lens-Type.html#t:Lens