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{-# LANGUAGE GADTs #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE AllowAmbiguousTypes #-}
module T17139 where
import T17139a
type family TypeFam f fun where
TypeFam f (a -> b) = f a -> TypeFam f b
lift :: (a -> b) -> TypeFam f (a -> b)
lift f = \x -> _ (f <*> x)
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