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Make EitherT work with Validation
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import scala.concurrent.Future | |
import scala.concurrent.ExecutionContext.Implicits.global | |
import scalaz._ | |
import Scalaz._ | |
object console extends App { | |
val v1: Future[Validation[String, Int]] = 1.success[String].point[Future] | |
val v2: Future[Validation[String, Int]] = 1.success[String].point[Future] | |
implicit def etv[G[_], A, B](e: G[\/[A, B]])(implicit F : Functor[G]): G[Validation[A, B]] = { | |
F.map(e)(_.validation) | |
} | |
implicit def vte[G[_], A, B](v: G[Validation[A, B]])(implicit F : Functor[G]): G[\/[A, B]] = { | |
F.map(v)(_.disjunction) | |
} | |
val validation: Future[Validation[String, Int]] = | |
(for { | |
val1 <- EitherT[Future ,String, Int](v1) | |
val2 <- EitherT[Future ,String, Int](v2) | |
} yield val1 + val2).run | |
} |
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