Scala example source code file (GenSetFactory.scala)

This example Scala source code file (GenSetFactory.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, builder, canbuildfrom, cc, genericcompanion, genset, gensetfactory, gensetlike

The GenSetFactory.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */



package scala
package collection
package generic

import mutable.Builder
import scala.language.higherKinds

/** A template for companion objects of `Set` and subclasses thereof.
 *
 *  @define coll set
 *  @define Coll `Set`
 *  @define factoryInfo
 *    This object provides a set of operations needed to create `$Coll` values.
 *    @author Martin Odersky
 *    @version 2.8
 *    @since 2.8
 *  @define canBuildFromInfo
 *    The standard `CanBuildFrom` instance for `$Coll` objects.
 *    @see CanBuildFrom
 *  @define setCanBuildFromInfo
 *    The standard `CanBuildFrom` instance for `$Coll` objects.
 *    @see CanBuildFrom
 *    @see GenericCanBuildFrom
 */
abstract class GenSetFactory[CC[X] <: GenSet[X] with GenSetLike[X, CC[X]]]
  extends GenericCompanion[CC] {

  def newBuilder[A]: Builder[A, CC[A]]

  /** $setCanBuildFromInfo
   */
  def setCanBuildFrom[A] = new CanBuildFrom[CC[_], A, CC[A]] {
    def apply(from: CC[_]) = newBuilder[A]
    def apply() = newBuilder[A]
  }
}