blob: c617febd40e08d66174bbcc80bcea84e12f9f2d2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
{-# LANGUAGE DataKinds, GADTs, PolyKinds, RankNTypes, TypeOperators,
TypeFamilies #-}
module DumpRenamedAst where
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
main = putStrLn "hello"
|
