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/*
 * 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

/** Base trait for sorted sets */
trait SortedSet[A]
  extends Set[A]
     with collection.SortedSet[A]
     with SortedSetOps[A, SortedSet, SortedSet[A]]
     with SortedSetFactoryDefaults[A, SortedSet, Set] {

  override def unsorted: Set[A] = this

  override def sortedIterableFactory: SortedIterableFactory[SortedSet] = SortedSet
}

/**
  * @define coll immutable sorted set
  * @define Coll `immutable.SortedSet`
  */
trait SortedSetOps[A, +CC[X] <: SortedSet[X], +C <: SortedSetOps[A, CC, C]]
  extends SetOps[A, Set, C]
     with collection.SortedSetOps[A, CC, C] {

  def unsorted: Set[A]
}

trait StrictOptimizedSortedSetOps[A, +CC[X] <: SortedSet[X], +C <: SortedSetOps[A, CC, C]]
  extends SortedSetOps[A, CC, C]
    with collection.StrictOptimizedSortedSetOps[A, CC, C]
    with StrictOptimizedSetOps[A, Set, C] {
}

/**
  * $factoryInfo
  * @define coll immutable sorted set
  * @define Coll `immutable.SortedSet`
  */
@SerialVersionUID(3L)
object SortedSet extends SortedIterableFactory.Delegate[SortedSet](TreeSet) {
  override def from[E: Ordering](it: IterableOnce[E]): SortedSet[E] = it match {
    case ss: SortedSet[E] if Ordering[E] == ss.ordering => ss
    case _ => super.from(it)
  }
}