blob: ba973ae1f90cc60455039c768d286c20a1c2bb83 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DatatypeContexts #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE StandaloneKindSignatures #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE UnliftedNewtypes #-}
{-# LANGUAGE LinearTypes #-}
module EtaExpandNewtypeTF2 where
import Data.Kind
import GHC.Exts
data T1
type RR :: Type -> Type -> RuntimeRep
type family RR t1 t2 where
RR T1 _ = IntRep
type C1 :: Type -> Constraint
class C1 t
instance C1 T1
type C2 :: Type -> Constraint
class C2 t
type N :: forall t1 t2 -> TYPE (RR t1 t2) -> TYPE (RR t1 t2)
newtype (C1 t1, C2 t2) => N t1 t2 a = MkN a
foo :: forall t2 (a :: TYPE (RR T1 t2)). C2 t2 => a -> N T1 t2 a
foo = MkN
bar :: forall t2 (a :: TYPE (RR T1 t2)). C2 t2 => a %1 -> N T1 t2 a
bar = MkN
|
