zio
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zio/zio/ZLayer/Derive/Default

Default

zio.ZLayer$.Derive$.Default$
See theDefault companion trait
object Default

Attributes

Companion
trait
Graph
Supertypes
class Object
trait Matchable
class Any
Self type
Default.type

Members list

Type members

Classlikes

final implicit class ZLayerDefaultInvariantOps[R, E, A](self: WithContext[R, E, A]) extends AnyVal

Attributes

Supertypes
class AnyVal
trait Matchable
class Any

Types

type WithContext[R0, E0, A] = Default[A] { type R = R0; type E = E0; }

Value members

Concrete methods

def apply[A](implicit ev: Default[A]): WithContext[R, E, A]

Summons the implicit default for the specified type.

Summons the implicit default for the specified type.

Attributes

def fromLayer[R0, E0, A : Tag](zlayer: => ZLayer[R0, E0, A])(implicit evidence$323: Tag[A], trace: Trace): WithContext[R0, E0, A]

Uses the provided layer as the default layer.

Uses the provided layer as the default layer.

Attributes

def fromZIO[R, E, A : Tag](zio: => ZIO[R, E, A])(implicit evidence$322: Tag[A], trace: Trace): WithContext[R, E, A]

Constructs a default layer using the provided ZIO value.

Constructs a default layer using the provided ZIO value.

Attributes

def service[A : Tag](implicit evidence$324: Tag[A], trace: Trace): WithContext[A, Nothing, A]

Makes a default value that requires the specified service from the environment.

Makes a default value that requires the specified service from the environment.

Used to discard a predefined Default instance for ZLayer.derive.

Attributes

Example 
class Wheels(number: Int)
object Wheels {
 implicit val defaultWheels: ZLayer.Default.WithContext[Any, Nothing, Wheels] =
   ZLayer.Default.succeed(new Wheels(4))
}
class Car(wheels: Wheels)
val carLayer1: ULayer[Car] = ZLayer.derive // wheels.number == 4
val carLayer2: URLayer[Wheels, Car] = locally {
 // The default instance is discarded
 implicit val newWheels: ZLayer.Default.WithContext[Wheels, Nothing, Wheels] =
     ZLayer.Default.service[Wheels]
 ZLayer.derive[Car]
}
def succeed[A : Tag](a: => A)(implicit evidence$321: Tag[A], trace: Trace): WithContext[Any, Nothing, A]

Constructs a default layer using the provided value.

Constructs a default layer using the provided value.

Attributes

Implicits

Implicits

final implicit def ZLayerDefaultInvariantOps[R, E, A](self: WithContext[R, E, A]): ZLayerDefaultInvariantOps[R, E, A]
implicit def deriveDefaultConfig[A : Tag](implicit evidence$325: Tag[A], ev: Config[A], trace: Trace): WithContext[Any, Error, A]
implicit def deriveDefaultHub[A : Tag](implicit evidence$329: Tag[A], trace: Trace): WithContext[Any, Nothing, Hub[A]]
implicit def deriveDefaultPromise[E : Tag, A : Tag](implicit evidence$326: Tag[E], evidence$327: Tag[A], trace: Trace): WithContext[Any, Nothing, Promise[E, A]]
implicit def deriveDefaultQueue[A : Tag](implicit evidence$328: Tag[A], trace: Trace): WithContext[Any, Nothing, Queue[A]]
implicit def deriveDefaultRef[A : Tag](implicit evidence$330: Tag[A], ev: Default[A], trace: Trace): WithContext[R, E, Ref[A]]

Inherited implicits

implicit def defaultPromiseNothing[A : Tag](implicit evidence$331: Tag[A], trace: Trace): WithContext[Any, Nothing, Promise[Nothing, A]]

Attributes

Inherited from:
DefaultInstances0 (hidden)
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