Define OptionT.mapFilter in terms of OptionT.subflatMap (#2765)

fixes #2757
typelevel · Mar 28, 2019 · 9479ce5 · 9479ce5
1 parent 56a1339
commit 9479ce5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/core/src/main/scala/cats/data/OptionT.scala b/core/src/main/scala/cats/data/OptionT.scala
@@ -47,7 +47,7 @@ final case class OptionT[F[_], A](value: F[Option[A]]) {
     flatMap(a => OptionT.liftF(f(a)))
 
   def mapFilter[B](f: A => Option[B])(implicit F: Functor[F]): OptionT[F, B] =
-    OptionT(F.map(value)(_.flatMap(f)))
+    subflatMap(f)
 
   def flatMap[B](f: A => OptionT[F, B])(implicit F: Monad[F]): OptionT[F, B] =
     flatMapF(a => f(a).value)