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Add missing lift combinators for ZManaged #4798

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Mar 17, 2021
Merged

Add missing lift combinators for ZManaged #4798

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16 changes: 16 additions & 0 deletions core/shared/src/main/scala/zio/ZManaged.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -1799,6 +1799,22 @@ object ZManaged extends ZManagedPlatformSpecific {
*/
def fromFunctionM[R, E, A](f: R => ZManaged[Any, E, A]): ZManaged[R, E, A] = flatten(fromFunction(f))

/**
* Lifts an `Option` into a `ZManaged` but preserves the error as an option in the error channel, making it easier to compose
* in some scenarios.
*/
def fromOption[A](v: => Option[A]): ZManaged[Any, Option[Nothing], A] =
effectTotal(v).flatMap(_.fold[Managed[Option[Nothing], A]](fail(None))(succeedNow))

/**
* Lifts a `Try` into a `ZManaged`.
*/
def fromTry[A](value: => scala.util.Try[A]): TaskManaged[A] =
effect(value).flatMap {
case scala.util.Success(v) => succeedNow(v)
case scala.util.Failure(t) => fail(t)
}

/**
* Returns an effect that models failure with the specified `Cause`.
*/
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