Scala example source code file (Seq.scala)

This example Scala source code file (Seq.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, abstractiterable, abstractseq, canbuildfrom, genericcompanion, generictraversabletemplate, genseq, seq, seqfactory, seqlike

The Seq.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection

import generic._
import mutable.Builder

/** A base trait for sequences.
 *  $seqInfo
 */
trait Seq[+A] extends PartialFunction[Int, A]
                      with Iterable[A]
                      with GenSeq[A]
                      with GenericTraversableTemplate[A, Seq]
                      with SeqLike[A, Seq[A]] {
  override def companion: GenericCompanion[Seq] = Seq

  override def seq: Seq[A] = this
}

/** $factoryInfo
 *  The current default implementation of a $Coll is a `List`.
 *  @define coll sequence
 *  @define Coll `Seq`
 */
object Seq extends SeqFactory[Seq] {
  /** $genericCanBuildFromInfo */
  implicit def canBuildFrom[A]: CanBuildFrom[Coll, A, Seq[A]] = ReusableCBF.asInstanceOf[GenericCanBuildFrom[A]]

  def newBuilder[A]: Builder[A, Seq[A]] = immutable.Seq.newBuilder[A]
}

/** Explicit instantiation of the `Seq` trait to reduce class file size in subclasses. */
abstract class AbstractSeq[+A] extends AbstractIterable[A] with Seq[A]