blob: 15b37b683cd61d878efc9873e40a67f6469100d7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
{-# LANGUAGE Haskell2010 #-}
{-# LANGUAGE DataKinds, PolyKinds, TypeOperators, TypeFamilies
, TypeApplications, TypeInType #-}
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
main = putStrLn "hello"
|
