| career | drupal | java | mac | mysql | perl | scala | uml | unix  

Scala example source code file (ScalaCheckBinding.scala)

This example Scala source code file (ScalaCheckBinding.scala) is included in the "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

arbitrary, arbitrarymonad, gen, genmonad, invariantfunctor, monad, scalacheckbinding, shrink, shrinkfunctor

The ScalaCheckBinding.scala Scala example source code

package scalaz
package scalacheck

 * Type class instances for types from [[ Scalacheck]]
object ScalaCheckBinding {
  import org.scalacheck.{Gen, Arbitrary, Shrink}
  import Gen.{sized, const}

  implicit val ArbitraryMonad: Monad[Arbitrary] = new Monad[Arbitrary] {
    def bind[A, B](fa: Arbitrary[A])(f: A => Arbitrary[B]) = Arbitrary(fa.arbitrary.flatMap(f(_).arbitrary))
    def point[A](a: => A) = Arbitrary(sized(_ => const(a)))
    override def map[A, B](fa: Arbitrary[A])(f: A => B) = Arbitrary(

  implicit val GenMonad: Monad[Gen] = new Monad[Gen] {
    def point[A](a: => A) = sized(_ => const(a))
    def bind[A, B](fa: Gen[A])(f: A => Gen[B]) = fa flatMap f
    override def map[A, B](fa: Gen[A])(f: A => B) = fa map f

  implicit val ShrinkFunctor: InvariantFunctor[Shrink] =
    new InvariantFunctor[Shrink] {
      def xmap[A, B](ma: Shrink[A], f: A => B, g: B => A): Shrink[B] =
        Shrink{b => ma shrink g(b) map f}

// vim: expandtab:ts=2:sw=2

Other Scala examples (source code examples)

Here is a short list of links related to this Scala ScalaCheckBinding.scala source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller


new blog posts


Copyright 1998-2021 Alvin Alexander,
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.