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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2009, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.collection.immutable
import scala.collection.generic._
/** A sorted set.
*
* @author Sean McDirmid
* @author Martin Odersky
* @version 2.8
*/
trait SortedSet[A] extends Set[A] with collection.SortedSet[A] with SortedSetTemplate[A, SortedSet[A]] {
/** Needs to be overridden in subclasses. */
override def empty: SortedSet[A] = throw new UnsupportedOperationException("SortedMap.empty")
}
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