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{-# LANGUAGE Haskell2010 #-}
{-# LANGUAGE DataKinds, GADTs, PolyKinds, RankNTypes, TypeOperators,
TypeFamilies, StarIsType, TypeApplications #-}
module DumpRenamedAst where
import Data.Kind
import Data.Kind (Type)
data Peano = Zero | Succ Peano
type family Length (as :: [k]) :: Peano where
Length (a : as) = Succ (Length as)
Length '[] = Zero
data family Nat :: k -> k -> Type
-- Ensure that the `k` in the type pattern and `k` in the kind signature have
-- the same binding site.
newtype instance Nat (a :: k -> Type) :: (k -> Type) -> Type where
Nat :: (forall xx. f xx -> g xx) -> Nat f g
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
main = putStrLn "hello"
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