kits.std.Try.scala Maven / Gradle / Ivy
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package kits
package std
import scala.util.{Failure, Try, Success}
trait TryFunctor extends Functor[Try] {
override final def map[A, B](fa: Try[A])(f: A => B): Try[B] = fa.map(f)
}
trait TryMonad extends Monad[Try] { self: TryFunctor =>
override final def pure[A](a: A): Try[A] = Success(a)
override final def flatMap[A, B](fa: Try[A])(f: A => Try[B]): Try[B] = fa.flatMap(f)
}
trait TryTraverse extends Traverse[Try] { self: TryFunctor =>
override final def traverse[F[_], A, B](fa: Try[A])(f: A => F[B])(implicit F: Applicative[F]): F[Try[B]] =
fa match {
case Success(a) => F.map(f(a))(Success(_))
case Failure(e) => F.pure(Failure(e))
}
}