/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2011, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */



package scala.collection
package mutable

import generic._


/** A subtrait of `collection.Seq` which represents sequences
 *  that can be mutated.
 *
 *  $seqInfo
 *
 *  The class adds an `update` method to `collection.Seq`.
 *
 *  @define Coll mutable.Seq
 *  @define coll mutable sequence
 */
trait Seq[A] extends Iterable[A]
//                with GenSeq[A]
                with scala.collection.Seq[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 an `ArrayBuffer`.
 *  @define coll mutable sequence
 *  @define Coll mutable.Seq
 */
object Seq extends SeqFactory[Seq] {
  implicit def canBuildFrom[A]: CanBuildFrom[Coll, A, Seq[A]] = ReusableCBF.asInstanceOf[GenericCanBuildFrom[A]]
  def newBuilder[A]: Builder[A, Seq[A]] = new ArrayBuffer
}

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