Scala example source code file (IndexedSeq.scala)

This example Scala source code file (IndexedSeq.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

a, canbuildfrom, genericcanbuildfrom, genericcompanion, generictraversabletemplate, indexedseq, indexedseqfactory, indexedseqlike, reusablecbf, seq

The IndexedSeq.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2006-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection

import generic._
import mutable.Builder

/** A base trait for indexed sequences.
 *  $indexedSeqInfo
 */
trait IndexedSeq[+A] extends Seq[A]
                    with GenericTraversableTemplate[A, IndexedSeq]
                    with IndexedSeqLike[A, IndexedSeq[A]] {
  override def companion: GenericCompanion[IndexedSeq] = IndexedSeq
  override def seq: IndexedSeq[A] = this
}

/** $factoryInfo
 *  The current default implementation of a $Coll is a `Vector`.
 *  @define coll indexed sequence
 *  @define Coll `IndexedSeq`
 */
object IndexedSeq extends IndexedSeqFactory[IndexedSeq] {
  // A single CBF which can be checked against to identify
  // an indexed collection type.
  override val ReusableCBF: GenericCanBuildFrom[Nothing] = new GenericCanBuildFrom[Nothing] {
    override def apply() = newBuilder[Nothing]
  }
  def newBuilder[A]: Builder[A, IndexedSeq[A]] = immutable.IndexedSeq.newBuilder[A]
  implicit def canBuildFrom[A]: CanBuildFrom[Coll, A, IndexedSeq[A]] =
    ReusableCBF.asInstanceOf[GenericCanBuildFrom[A]]
}