trait Bifunctor[F[_, _]] extends Serializable

A type class of types which give rise to two independent, covariant functors.

Self Type
Bifunctor[F]
Source
Bifunctor.scala
Linear Supertypes
Serializable, Serializable, Any
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  1. Bifunctor
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Abstract Value Members

  1. abstract def bimap[A, B, C, D](fab: F[A, B])(f: (A) ⇒ C, g: (B) ⇒ D): F[C, D]

    The quintessential method of the Bifunctor trait, it applies a function to each "side" of the bifunctor.

    The quintessential method of the Bifunctor trait, it applies a function to each "side" of the bifunctor.

    Example:

    scala> import cats.implicits._
    
    scala> val x: (List[String], Int) = (List("foo", "bar"), 3)
    scala> x.bimap(_.headOption, _.toLong + 1)
    res0: (Option[String], Long) = (Some(foo),4)
  2. abstract def getClass(): Class[_]
    Definition Classes
    Any

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    Any
  2. final def ##(): Int
    Definition Classes
    Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def compose[G[_, _]](implicit G0: Bifunctor[G]): Bifunctor[[α, β]F[G[α, β], G[α, β]]]

    The composition of two Bifunctors is itself a Bifunctor

  6. def equals(arg0: Any): Boolean
    Definition Classes
    Any
  7. def hashCode(): Int
    Definition Classes
    Any
  8. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  9. def leftFunctor[X]: Functor[[α$1$]F[α$1$, X]]
  10. def leftMap[A, B, C](fab: F[A, B])(f: (A) ⇒ C): F[C, B]

    apply a function to the "left" functor

  11. def leftWiden[A, B, AA >: A](fab: F[A, B]): F[AA, B]

    Widens A into a supertype AA.

    Widens A into a supertype AA. Example:

    scala> import cats.implicits._
    scala> sealed trait Foo
    scala> case object Bar extends Foo
    scala> val x1: Either[Bar.type, Int] = Either.left(Bar)
    scala> val x2: Either[Foo, Int] = x1.leftWiden
  12. def rightFunctor[X]: Functor[[β$0$]F[X, β$0$]]
  13. def toString(): String
    Definition Classes
    Any

Inherited from Serializable

Inherited from Serializable

Inherited from Any

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