Contravariant.WITH_CONTRAMAP
The minimum definition of a Contravariant. It is by using the combinators of this module that the other combinators will be derived.
Contravariant
type 'a t
The type held by the Contravariant Functor.
Contravariant Functor
val contramap : ('a -> 'b) -> 'b t -> 'a t
Mapping over from 'a to 'b over 'b t to 'a t.
'a
'b
'b t
'a t