trait
Contravariant
[F[_]]
extends InvariantFunctor[F]
Abstract Value Members
-
def
contramap
[A, B]
(r: F[A], f: (B) ⇒ A): F[B]
Concrete Value Members
-
def
!=
(arg0: AnyRef): Boolean
-
def
!=
(arg0: Any): Boolean
-
def
##
(): Int
-
def
==
(arg0: AnyRef): Boolean
-
def
==
(arg0: Any): Boolean
-
def
asInstanceOf
[T0]
: T0
-
def
clone
(): AnyRef
-
def
eq
(arg0: AnyRef): Boolean
-
def
equals
(arg0: Any): Boolean
-
def
finalize
(): Unit
-
def
getClass
(): java.lang.Class[_]
-
def
hashCode
(): Int
-
def
isInstanceOf
[T0]
: Boolean
-
def
ne
(arg0: AnyRef): Boolean
-
def
notify
(): Unit
-
def
notifyAll
(): Unit
-
def
synchronized
[T0]
(arg0: ⇒ T0): T0
-
def
toString
(): String
-
def
wait
(): Unit
-
def
wait
(arg0: Long, arg1: Int): Unit
-
def
wait
(arg0: Long): Unit
-
def
xmap
[A, B]
(ma: F[A], f: (A) ⇒ B, g: (B) ⇒ A): F[B]
Inherited from AnyRef
Inherited from Any
Contra-variant function application in an environment.
All contra-variant functor instances must satisfy 2 laws:
forall a. a == contramap(a, identity)
forall a f g. contramap(a, f compose g) == contramap(contramap(a, f), g)