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{-# LANGUAGE DataKinds, PolyKinds, TypeOperators, TypeFamilies
, TypeApplications #-}
module DumpParsedAst where
import Data.Kind
data Peano = Zero | Succ Peano
type family Length (as :: [k]) :: Peano where
Length (a : as) = Succ (Length as)
Length '[] = Zero
-- vis kind app
data T f (a :: k) = MkT (f a)
type family F1 (a :: k) (f :: k -> Type) :: Type where
F1 @Peano a f = T @Peano f a
data family DF3 (a :: k)
data instance DF3 @(K.Type -> K.Type) b = DF3Char
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