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{-# LANGUAGE Haskell2010 #-}
{-# Language RankNTypes #-}
{-# Language DerivingVia #-}
{-# Language DeriveFunctor #-}
-- import Control.Monad.Codensity
import Data.Kind
newtype Codensity f a = Codensity (forall xx. (a -> f xx) -> f xx)
deriving
(Functor)
newtype GEndo m a = GEndo (m a -> m a)
newtype LogicT m a = LogicT (forall xx. (a -> (m xx -> m xx)) -> (m xx -> m xx))
deriving
(Functor)
via
(Codensity GEndo)
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