Scala example source code file (IdTTest.scala)

This example Scala source code file (IdTTest.scala) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Scala by Example" ^TM.

Learn more about this Scala project at its project page.

Java - Scala tags/keywords

applicative, applicativeplus, apply, bindrec, equal, foldable, functor, idttest, monad, order, speclite, traverse

The IdTTest.scala Scala example source code

package scalaz


object IdTTest extends SpecLite {

  object instances {
    def equal[F[_], A](implicit F: Equal[F[A]]) = Equal[IdT[F, A]]
    def order[F[_], A](implicit F: Order[F[A]]) = Order[IdT[F, A]]
    def functor[F[_] : Functor] = Functor[IdT[F, ?]]
    def apply[F[_] : Apply] = Apply[IdT[F, ?]]
    def bindRec[F[_] : BindRec] = BindRec[IdT[F, ?]]
    def monad[F[_] : Monad] = Monad[IdT[F, ?]]
    def foldable[F[_] : Foldable] = Foldable[IdT[F, ?]]
    def traverse[F[_] : Traverse] = Traverse[IdT[F, ?]]

    // checking absence of ambiguity
    def equal[F[_], A](implicit F: Order[F[A]]) = Equal[IdT[F, A]]
    def functor[F[_] : Monad] = Functor[IdT[F, ?]]
    def functor[F[_] : Monad : Traverse] = Functor[IdT[F, ?]]
    def functor[F[_] : BindRec: Traverse] = Functor[IdT[F, ?]]
    def functor[F[_] : Apply: BindRec] = Functor[IdT[F, ?]]
    def functor[F[_] : Applicative: BindRec] = Functor[IdT[F, ?]]
    def functor[F[_] : Monad : BindRec] = Functor[IdT[F, ?]]
    def apply[F[_] : Monad] = Apply[IdT[F, ?]]
    def apply[F[_] : BindRec] = Apply[IdT[F, ?]]
    def apply[F[_] : Applicative: BindRec] = Apply[IdT[F, ?]]
    def apply[F[_] : ApplicativePlus: BindRec] = Apply[IdT[F, ?]]
    def apply[F[_] : Monad: BindRec] = Apply[IdT[F, ?]]
    def foldable[F[_] : Traverse] = Foldable[IdT[F, ?]]
  }
}