add Arbitrary[Endomorphic[F, A]] in ScalazArbitrary

scalaz · Nov 19, 2016 · cf3e091 · cf3e091
1 parent 49d0fbe
commit cf3e091
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/scalacheck-binding/src/main/scala/scalaz/scalacheck/ScalazArbitrary.scala b/scalacheck-binding/src/main/scala/scalaz/scalacheck/ScalazArbitrary.scala
@@ -217,6 +217,9 @@ object ScalazArbitrary extends ScalazArbitraryPlatform {
   implicit def endoArb[A](implicit A: Arbitrary[A => A]): Arbitrary[Endo[A]] =
     Functor[Arbitrary].map(A)(Endo.endo)
 
+  implicit def endomorphicArbitrary[F[_, _], A](implicit F: Arbitrary[F[A, A]]): Arbitrary[Endomorphic[F, A]] =
+    Functor[Arbitrary].map(F)(Endomorphic[F, A](_))
+
   implicit def EphemeralStreamArbitrary[A : Arbitrary] =
     Functor[Arbitrary].map(arb[Stream[A]])(EphemeralStream.fromStream[A](_))