Scala example source code file (Combinators.scala)

This example Scala source code file (Combinators.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

actor, boolean, combinators, killactorcontrol, unit

The Combinators.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2005-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

// $Id$

package scala.actors

import scala.language.implicitConversions

private[actors] trait Combinators {

  /**
   * Enables the composition of suspendable closures using `andThen`,
   * `loop`, `loopWhile`, etc.
   */
  implicit def mkBody[a](body: => a): InternalActor.Body[a]

  /**
   * Repeatedly executes `body`.
   *
   * @param body the block to be executed
   */
  def loop(body: => Unit): Unit = body andThen loop(body)

  /**
   * Repeatedly executes `body` while the condition `cond` is `true`.
   *
   * @param cond the condition to test
   * @param body the block to be executed
   */
  def loopWhile(cond: => Boolean)(body: => Unit): Unit =
    if (cond) { body andThen loopWhile(cond)(body) }
    else continue

  /**
   * Continues with the execution of the closure registered as
   * continuation following `andThen`. Continues with the execution
   * of the next loop iteration when invoked inside the body of `loop`
   * or `loopWhile`.
   */
  def continue(): Unit = throw new KillActorControl

}