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Standard library for the Scala Programming Language
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection
package generic
import scala.collection.mutable.{ Builder, GrowingBuilder }
import scala.language.higherKinds
/**
* @define Coll `mutable.SortedSet`
* @define coll mutable sorted set
*
* @author Lucien Pereira
*
*/
abstract class MutableSortedSetFactory[CC[A] <: mutable.SortedSet[A] with SortedSetLike[A, CC[A]] with mutable.Set[A] with mutable.SetLike[A, CC[A]]] extends SortedSetFactory[CC] {
/**
* mutable.SetBuilder uses '+' which is not a primitive for anything extending mutable.SetLike,
* this causes serious perfomances issues since each time 'elems = elems + x'
* is evaluated elems is cloned (which is O(n)).
*
* Fortunately GrowingBuilder comes to rescue.
*
*/
override def newBuilder[A](implicit ord: Ordering[A]): Builder[A, CC[A]] = new GrowingBuilder[A, CC[A]](empty)
}