Scala example source code file (SetProxy.scala)

This example Scala source code file (SetProxy.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, abstractset, proxying, set, setproxy, setproxylike

The SetProxy.scala Scala example source code

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



package scala
package collection
package immutable

/** This is a simple wrapper class for <a href="Set.html"
 *  target="contentFrame">`scala.collection.immutable.Set`</a>.
 *
 *  It is most useful for assembling customized set abstractions
 *  dynamically using object composition and forwarding.
 *
 *  @tparam A    type of the elements contained in this set proxy.
 *
 *  @since 2.8
 */
@deprecated("Proxying is deprecated due to lack of use and compiler-level support.", "2.11.0")
trait SetProxy[A] extends Set[A] with SetProxyLike[A, Set[A]] {
  override def repr = this
  private def newProxy[B >: A](newSelf: Set[B]): SetProxy[B] =
    new AbstractSet[B] with SetProxy[B] { val self = newSelf }

  override def empty = newProxy(self.empty)
  override def + (elem: A) = newProxy(self + elem)
  override def - (elem: A) = newProxy(self - elem)
}