src/library/scala/collection/generic/SortedSetFactory.scala


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/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2006-2009, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

// $Id$


package scala.collection.generic

/** A template for companion objects of Set and subclasses thereof.
 */
abstract class SortedSetFactory[CC[A] <: SortedSet[A] with SortedSetTemplate[A, CC[A]]] {
  type Coll = CC[_]

  def newBuilder[A](implicit ord: Ordering[A]): Builder[A, CC[A]]

  def empty[A](implicit ord: Ordering[A]): CC[A]

  def apply[A](elems: A*)(implicit ord: Ordering[A]): CC[A] = (newBuilder[A](ord) ++= elems).result

  implicit def newBuilderFactory[A](implicit ord : Ordering[A]) : BuilderFactory[A, CC[A], Coll] = new SortedSetBuilderFactory()(ord);

  class SortedSetBuilderFactory[A](implicit ord: Ordering[A]) extends BuilderFactory[A, CC[A], Coll] {
    def apply(from: Coll) = newBuilder[A](ord)
  }
}