Scala example source code file (ParFactory.scala)

This example Scala source code file (ParFactory.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

a, cancombinefrom, cc, collection, genericcanbuildfrom, genericcancombinefrom, genericparcompanion, genericpartemplate, gentraversablefactory, parallel, parfactory, pariterable

The ParFactory.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2010-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection
package generic

import scala.collection.parallel.ParIterable
import scala.collection.parallel.Combiner
import scala.language.higherKinds

/** A template class for companion objects of `ParIterable` and subclasses
 *  thereof. This class extends `TraversableFactory` and provides a set of
 *  operations to create `$Coll` objects.
 *
 *  @define coll parallel collection
 *  @define Coll `ParIterable`
 *  @since 2.8
 */
abstract class ParFactory[CC[X] <: ParIterable[X] with GenericParTemplate[X, CC]]
extends GenTraversableFactory[CC]
   with GenericParCompanion[CC] {

  //type EPC[T, C] = scala.collection.parallel.EnvironmentPassingCombiner[T, C]

  /** A generic implementation of the `CanCombineFrom` trait, which forwards
   *  all calls to `apply(from)` to the `genericParBuilder` method of the $coll
   * `from`, and calls to `apply()` to this factory.
   */
  class GenericCanCombineFrom[A] extends GenericCanBuildFrom[A] with CanCombineFrom[CC[_], A, CC[A]] {
    override def apply(from: Coll) = from.genericCombiner
    override def apply() = newBuilder[A]
  }
}