scala.collection.generic.GenericOrderedCompanion.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 generic
import mutable.Builder
import scala.language.higherKinds
/** This class represents companions of classes which require the ordered trait
* for their element types.
*
* @author Aleksandar Prokopec
* @since 2.8
*/
abstract class GenericOrderedCompanion[+CC[X] <: Traversable[X]] {
protected[this] type Coll = CC[_]
def newBuilder[A](implicit ord: Ordering[A]): Builder[A, CC[A]]
def empty[A: Ordering]: CC[A] = newBuilder[A].result()
def apply[A](elems: A*)(implicit ord: Ordering[A]): CC[A] = {
val b = newBuilder[A]
b ++= elems
b.result()
}
}