blob: fef1676e50116d806146dbb35de0e4e6988577f9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
{-# LANGUAGE RankNTypes, KindSignatures #-}
{-# OPTIONS_GHC -Werror #-}
-- #959
module ShouldFail where
import Data.Kind (Type)
data D (f :: (Type -> Type) -> Type -> Type)
(af :: Type -> Type)
(ax :: Type) =
D (af (f af ax))
data CList (f :: (Type -> Type) -> Type -> Type) (a :: Type) =
RCons a (CList (D f) a)
type CycleList a = forall f. CList f a
chead :: CycleList a -> a
chead ys = case ys of (RCons x xs) -> x
|
