object EitherT extends EitherTInstances with Serializable

Linear Supertypes
Serializable, Serializable, EitherTInstances, EitherTInstances1, EitherTInstances2, EitherTInstances3, AnyRef, Any
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  1. EitherT
  2. Serializable
  3. Serializable
  4. EitherTInstances
  5. EitherTInstances1
  6. EitherTInstances2
  7. EitherTInstances3
  8. AnyRef
  9. Any
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Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. implicit def catsDataBifunctorForEitherT[F[_]](implicit F: Functor[F]): Bifunctor[[β$13$, γ$14$]EitherT[F, β$13$, γ$14$]]
    Definition Classes
    EitherTInstances
  6. implicit def catsDataBitraverseForEitherT[F[_]](implicit F: Traverse[F]): Bitraverse[[β$19$, γ$20$]EitherT[F, β$19$, γ$20$]]
    Definition Classes
    EitherTInstances1
  7. implicit def catsDataDeferForEitherT[F[_], L](implicit F: Defer[F]): Defer[[γ$16$]EitherT[F, L, γ$16$]]
    Definition Classes
    EitherTInstances
  8. implicit def catsDataEqForEitherT[F[_], L, R](implicit F: Eq[F[Either[L, R]]]): Eq[EitherT[F, L, R]]
    Definition Classes
    EitherTInstances2
  9. implicit def catsDataFoldableForEitherT[F[_], L](implicit F: Foldable[F]): Foldable[[γ$18$]EitherT[F, L, γ$18$]]
    Definition Classes
    EitherTInstances1
  10. implicit def catsDataFunctorForEitherT[F[_], L](implicit F0: Functor[F]): Functor[[γ$24$]EitherT[F, L, γ$24$]]
    Definition Classes
    EitherTInstances3
  11. implicit def catsDataMonadErrorFForEitherT[F[_], E, L](implicit FE0: MonadError[F, E]): MonadError[[γ$22$]EitherT[F, L, γ$22$], E]

    Monad error instance for recovering errors in F instead of the underlying Either.

    Monad error instance for recovering errors in F instead of the underlying Either.

    scala> import cats.data.EitherT
scala> import cats.MonadError
scala> import cats.instances.option._
scala> val noInt: Option[Either[String, Int]] = None
scala> val et = EitherT[Option, String, Int](noInt)
scala> val me = MonadError[EitherT[Option, String, ?], Unit]
scala> me.recover(et) { case () => 1 }
res0: cats.data.EitherT[Option,String,Int] = EitherT(Some(Right(1)))
    Definition Classes
    EitherTInstances2
  12. implicit def catsDataMonadErrorForEitherT[F[_], L](implicit F0: Monad[F]): MonadError[[γ$21$]EitherT[F, L, γ$21$], L]
    Definition Classes
    EitherTInstances1
  13. implicit def catsDataOrderForEitherT[F[_], L, R](implicit F: Order[F[Either[L, R]]]): Order[EitherT[F, L, R]]
    Definition Classes
    EitherTInstances
  14. implicit def catsDataPartialOrderForEitherT[F[_], L, R](implicit F: PartialOrder[F[Either[L, R]]]): PartialOrder[EitherT[F, L, R]]
    Definition Classes
    EitherTInstances1
  15. implicit def catsDataSemigroupKForEitherT[F[_], L](implicit F0: Monad[F]): SemigroupK[[γ$23$]EitherT[F, L, γ$23$]]
    Definition Classes
    EitherTInstances2
  16. implicit def catsDataShowForEitherT[F[_], L, R](implicit sh: Show[F[Either[L, R]]]): Show[EitherT[F, L, R]]
    Definition Classes
    EitherTInstances
  17. implicit def catsDataTraverseForEitherT[F[_], L](implicit FF: Traverse[F]): Traverse[[γ$15$]EitherT[F, L, γ$15$]]
    Definition Classes
    EitherTInstances
  18. implicit def catsMonoidForEitherT[F[_], L, A](implicit F: Monoid[F[Either[L, A]]]): Monoid[EitherT[F, L, A]]
    Definition Classes
    EitherTInstances
  19. implicit def catsSemigroupForEitherT[F[_], L, A](implicit F: Semigroup[F[Either[L, A]]]): Semigroup[EitherT[F, L, A]]
    Definition Classes
    EitherTInstances1
  20. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  21. final def cond[F[_]]: CondPartiallyApplied[F]

    If the condition is satisfied, return the given A in Right lifted into the specified Applicative, otherwise, return the given E in Left lifted into the specified Applicative.

    If the condition is satisfied, return the given A in Right lifted into the specified Applicative, otherwise, return the given E in Left lifted into the specified Applicative.

    scala> import cats.Id
scala> import cats.data.EitherT
scala> val userInput = "hello world"
scala> EitherT.cond[Id](
     |   userInput.forall(_.isDigit) && userInput.size == 10,
     |   userInput,
     |   "The input does not look like a phone number")
res0: EitherT[Id, String, String] = EitherT(Left(The input does not look like a phone number))
  22. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  23. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  24. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  25. final def fromEither[F[_]]: FromEitherPartiallyApplied[F]

    Transforms an Either into an EitherT, lifted into the specified Applicative.

    Transforms an Either into an EitherT, lifted into the specified Applicative.

    Note: The return type is a FromEitherPartiallyApplied[F], which has an apply method on it, allowing you to call fromEither like this:

    scala> import cats.implicits._
scala> val t: Either[String, Int] = Either.right(3)
scala> EitherT.fromEither[Option](t)
res0: EitherT[Option, String, Int] = EitherT(Some(Right(3)))

    The reason for the indirection is to emulate currying type parameters.

  26. final def fromOption[F[_]]: FromOptionPartiallyApplied[F]

    Transforms an Option into an EitherT, lifted into the specified Applicative and using the second argument if the Option is a None.

    Transforms an Option into an EitherT, lifted into the specified Applicative and using the second argument if the Option is a None.

    scala> import cats.implicits._
scala> val o: Option[Int] = None
scala> EitherT.fromOption[List](o, "Answer not known.")
res0: EitherT[List, String, Int]  = EitherT(List(Left(Answer not known.)))
scala> EitherT.fromOption[List](Some(42), "Answer not known.")
res1: EitherT[List, String, Int] = EitherT(List(Right(42)))
  27. final def fromOptionF[F[_], E, A](fopt: F[Option[A]], ifNone: ⇒ E)(implicit F: Functor[F]): EitherT[F, E, A]

    Transforms an F[Option] into an EitherT, using the second argument if the Option is a None.

    Transforms an F[Option] into an EitherT, using the second argument if the Option is a None.

    scala> import cats.implicits._
scala> val o: Option[Int] = None
scala> EitherT.fromOptionF(List(o), "Answer not known.")
res0: EitherT[List, String, Int]  = EitherT(List(Left(Answer not known.)))
scala> EitherT.fromOptionF(List(Option(42)), "Answer not known.")
res1: EitherT[List, String, Int] = EitherT(List(Right(42)))
  28. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  29. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  30. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  31. final def left[B]: LeftPartiallyApplied[B]

    Creates a left version of EitherT[F, A, B] from a F[A]

    Creates a left version of EitherT[F, A, B] from a F[A]

    scala> import cats.data.EitherT
scala> import cats.implicits._
scala> EitherT.left[Int](Option("err"))
res0: cats.data.EitherT[Option,String,Int] = EitherT(Some(Left(err)))
  32. final def leftT[F[_], B]: LeftTPartiallyApplied[F, B]

    Creates a left version of EitherT[F, A, B] from a A

    Creates a left version of EitherT[F, A, B] from a A

    scala> import cats.data.EitherT
scala> import cats.implicits._
scala> EitherT.leftT[Option, Int]("err")
res0: cats.data.EitherT[Option,String,Int] = EitherT(Some(Left(err)))
  33. final def liftF[F[_], A, B](fb: F[B])(implicit F: Functor[F]): EitherT[F, A, B]

    Alias for right

    Alias for right

    scala> import cats.data.EitherT
scala> import cats.implicits._
scala> val o: Option[Int] = Some(3)
scala> val n: Option[Int] = None
scala> EitherT.liftF(o)
res0: cats.data.EitherT[Option,Nothing,Int] = EitherT(Some(Right(3)))
scala> EitherT.liftF(n)
res1: cats.data.EitherT[Option,Nothing,Int] = EitherT(None)
  34. final def liftK[F[_], A](implicit F: Functor[F]): ~>[F, [γ$10$]EitherT[F, A, γ$10$]]

    Same as liftF, but expressed as a FunctionK for use with mapK

    Same as liftF, but expressed as a FunctionK for use with mapK

    scala> import cats._, data._, implicits._
scala> val a: OptionT[Eval, Int] = 1.pure[OptionT[Eval, ?]]
scala> val b: OptionT[EitherT[Eval, String, ?], Int] = a.mapK(EitherT.liftK)
scala> b.value.value.value
res0: Either[String,Option[Int]] = Right(Some(1))
  35. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  36. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  37. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  38. final def pure[F[_], A]: PurePartiallyApplied[F, A]

    Creates a new EitherT[F, A, B] from a B

    Creates a new EitherT[F, A, B] from a B

    scala> import cats.data.EitherT
scala> import cats.implicits._
scala> EitherT.pure[Option, String](3)
res0: cats.data.EitherT[Option,String,Int] = EitherT(Some(Right(3)))
  39. final def right[A]: RightPartiallyApplied[A]

    Creates a right version of EitherT[F, A, B] from a F[B]

    Creates a right version of EitherT[F, A, B] from a F[B]

    scala> import cats.data.EitherT
scala> import cats.implicits._
scala> EitherT.right[String](Option(3))
res0: cats.data.EitherT[Option,String,Int] = EitherT(Some(Right(3)))
  40. final def rightT[F[_], A]: PurePartiallyApplied[F, A]

    Alias for pure

    Alias for pure

    scala> import cats.data.EitherT
scala> import cats.implicits._
scala> EitherT.rightT[Option, String](3)
res0: cats.data.EitherT[Option,String,Int] = EitherT(Some(Right(3)))
  41. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  42. def toString(): String
    Definition Classes
    AnyRef → Any
  43. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  44. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  45. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )

Deprecated Value Members

  1. final def liftT[F[_], A, B](fb: F[B])(implicit F: Functor[F]): EitherT[F, A, B]
    Annotations
    @deprecated
    Deprecated

    (Since version 1.0.0-RC1) Use EitherT.liftF.

Inherited from Serializable

Inherited from Serializable

Inherited from EitherTInstances

Inherited from EitherTInstances1

Inherited from EitherTInstances2

Inherited from EitherTInstances3

Inherited from AnyRef

Inherited from Any

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