scala.collection.immutable.SortedSet.scala Maven / Gradle / Ivy
/*
* Scala (https://www.scala-lang.org)
*
* Copyright EPFL and Lightbend, Inc.
*
* Licensed under Apache License 2.0
* (http://www.apache.org/licenses/LICENSE-2.0).
*
* See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*/
package scala
package collection
package immutable
import generic._
/** A subtrait of `collection.SortedSet` which represents sorted sets
* which cannot be mutated.
*
* @author Sean McDirmid
* @author Martin Odersky
* @since 2.4
* @define Coll `immutable.SortedSet`
* @define coll immutable sorted set
*/
trait SortedSet[A] extends Set[A] with scala.collection.SortedSet[A] with SortedSetLike[A, SortedSet[A]] {
/** Needs to be overridden in subclasses. */
override def empty: SortedSet[A] = SortedSet.empty[A]
override def equals(that: Any): Boolean = that match {
case _ if this eq that.asInstanceOf[AnyRef] => true
case ss: SortedSet[_] if ss.ordering == this.ordering =>
(ss canEqual this) &&
(this.size == ss.size) && {
val i1 = this.iterator
val i2 = ss.iterator
var allEqual = true
while (allEqual && i1.hasNext)
allEqual = i1.next() == i2.next
allEqual
}
// copy/pasted from super.equals for binary compat reasons!
case that: GenSet[_] =>
GenSet.setEquals(this, that)
case _ =>
false && super.equals(that) // generate unused super accessor for binary compatibility (scala/scala#9311)
}
}
/** $factoryInfo
* @define Coll `immutable.SortedSet`
* @define coll immutable sorted set
*/
object SortedSet extends ImmutableSortedSetFactory[SortedSet] {
/** $sortedSetCanBuildFromInfo */
def canBuildFrom[A](implicit ord: Ordering[A]): CanBuildFrom[Coll, A, SortedSet[A]] = newCanBuildFrom[A]
def empty[A](implicit ord: Ordering[A]): SortedSet[A] = TreeSet.empty[A]
override def newBuilder[A](implicit ord: Ordering[A]): mutable.Builder[A, SortedSet[A]] = TreeSet.newBuilder[A]
// Force a declaration here so that BitSet (which does not inherit from SortedSetFactory) can be more specific
override implicit def newCanBuildFrom[A](implicit ord : Ordering[A]) : CanBuildFrom[Coll, A, SortedSet[A]] = super.newCanBuildFrom
}