App

The entry point for a purely-functional application on the JVM.

import java.io.IOException
import scalaz.zio.{App, IO}
import scalaz.zio.console._

object MyApp extends App {

  def run(args: List[String]): IO[Nothing, ExitStatus] =
    myAppLogic.attempt.map(_.fold(_ => 1, _ => 0)).map(ExitStatus.ExitNow(_))

  def myAppLogic: IO[IOException, Unit] =
    for {
      _ <- putStrLn("Hello! What is your name?")
      n <- getStrLn
      _ <- putStrLn("Hello, " + n + ", good to meet you!")
    } yield ()
}

Linear Supertypes

RTS, AnyRef, Any

Type Members

sealed abstract class ExitStatus extends Serializable with Product

Abstract Value Members

abstract def run(args: List[String]): IO[Nothing, ExitStatus]

The main function of the application, which will be passed the command-line arguments to the program and has to return an IO with the errors fully handled.

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
object ExitStatus extends Serializable
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
lazy val env: Env

Definition Classes
RTS
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def main(args0: Array[String]): Unit

The Scala main function, intended to be called only by the Scala runtime.
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def shutdown(): Unit

Definition Classes
RTS
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def unsafeRun[E, A](io: IO[E, A]): A

Definition Classes
RTS
final def unsafeRunAsync[E, A](io: IO[E, A])(k: (ExitResult[E, A]) ⇒ Unit): Unit

Definition Classes
RTS
final def unsafeRunSync[E, A](io: IO[E, A]): ExitResult[E, A]

Definition Classes
RTS
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Doc: package zio

trait App extends RTS

Type Members

sealed abstract class ExitStatus extends Serializable with Product

Abstract Value Members

abstract def run(args: List[String]): IO[Nothing, ExitStatus]

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

object ExitStatus extends Serializable

final def asInstanceOf[T0]: T0

def clone(): AnyRef

lazy val env: Env

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def main(args0: Array[String]): Unit

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def shutdown(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def unsafeRun[E, A](io: IO[E, A]): A

final def unsafeRunAsync[E, A](io: IO[E, A])(k: (ExitResult[E, A]) ⇒ Unit): Unit

final def unsafeRunSync[E, A](io: IO[E, A]): ExitResult[E, A]

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from RTS

Inherited from AnyRef

Inherited from Any

Ungrouped