Add convenience wrapper for Xor.fromOption in XorT.

typelevel · Jun 1, 2016 · 43fb68f · 43fb68f
1 parent 2fb4d1d
commit 43fb68f
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/core/src/main/scala/cats/data/XorT.scala b/core/src/main/scala/cats/data/XorT.scala
@@ -213,6 +213,13 @@ trait XorTFunctions {
     def apply[E, A](eit: Either[E,A])(implicit F: Applicative[F]): XorT[F, E, A] =
       XorT(F.pure(Xor.fromEither(eit)))
   }
+
+  final def fromOption[F[_]]: FromOptionPartiallyApplied[F] = new FromOptionPartiallyApplied
+
+  final class FromOptionPartiallyApplied[F[_]] private[XorTFunctions] {
+    def apply[E, A](opt: Option[A], ifNone: => E)(implicit F: Applicative[F]): XorT[F, E, A] =
+      fromXor[F](Xor.fromOption(opt, ifNone))
+  }
 }
 
 private[data] abstract class XorTInstances extends XorTInstances1 {