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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2006-2009, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.collection
import generic._
import mutable.Builder
/** A map whose keys are sorted.
*
* @author Sean McDirmid
* @author Martin Odersky
* @version 2.8
* @since 2.4
*/
trait SortedMap[A, +B] extends Map[A, B] with SortedMapLike[A, B, SortedMap[A, B]] {
/** Needs to be overridden in subclasses. */
override def empty = SortedMap.empty[A, B]
override protected[this] def newBuilder : Builder[(A, B), SortedMap[A, B]] =
immutable.SortedMap.newBuilder[A, B]
}
/**
* @since 2.8
*/
object SortedMap extends ImmutableSortedMapFactory[immutable.SortedMap] {
implicit def canBuildFrom[A, B](implicit ord: Ordering[A]): CanBuildFrom[Coll, (A, B), SortedMap[A, B]] = new SortedMapCanBuildFrom[A, B]
def empty[A, B](implicit ord: Ordering[A]): immutable.SortedMap[A, B] = immutable.SortedMap.empty[A, B](ord)
}
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