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{-# Language KindSignatures, TypeOperators, PolyKinds, TypeOperators,
ConstraintKinds, TypeFamilies, DataKinds, GADTs,
AllowAmbiguousTypes, InstanceSigs #-}
module T14450 where
import Data.Kind
data TyFun :: Type -> Type -> Type
type a ~> b = TyFun a b -> Type
type Cat ob = ob -> ob -> Type
type SameKind (a :: k) (b :: k) = (() :: Constraint)
type family Apply (f :: a ~> b) (x :: a) :: b where
Apply IddSym0 x = Idd x
class Varpi (f :: i ~> j) where
type Dom (f :: i ~> j) :: Cat i
type Cod (f :: i ~> j) :: Cat j
varpa :: Dom f a a' -> Cod f (Apply f a) (Apply f a')
type family Idd (a::k) :: k where
Idd (a::k) = a
data IddSym0 :: k ~> k where
IddSym0KindInference :: IddSym0 l
instance Varpi (IddSym0 :: k ~> k) where
type Dom (IddSym0 :: Type ~> Type) = (->)
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