Safe Haskell	Trustworthy
Language	Haskell2010

Data.Typeable.Compat

Synopsis

module Data.Typeable
heqT :: forall {k1} {k2} (a :: k1) (b :: k2). (Typeable a, Typeable b) => Maybe (a :~~: b)
decT :: forall {k} (a :: k) (b :: k). (Typeable a, Typeable b) => Either ((a :~: b) -> Void) (a :~: b)
hdecT :: forall {k1} {k2} (a :: k1) (b :: k2). (Typeable a, Typeable b) => Either ((a :~~: b) -> Void) (a :~~: b)

Documentation

heqT :: forall {k1} {k2} (a :: k1) (b :: k2). (Typeable a, Typeable b) => Maybe (a :~~: b) #

Extract a witness of heterogeneous equality of two types

Since: base-4.18.0.0

decT :: forall {k} (a :: k) (b :: k). (Typeable a, Typeable b) => Either ((a :~: b) -> Void) (a :~: b) #

Decide an equality of two types

Since: base-4.19.0.0

hdecT :: forall {k1} {k2} (a :: k1) (b :: k2). (Typeable a, Typeable b) => Either ((a :~~: b) -> Void) (a :~~: b) #

Decide heterogeneous equality of two types.

Since: base-4.19.0.0