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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2009, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.collection.generic
import TraversableView.NoBuilder
/** A non-strict projection of an iterable.
* @author Sean McDirmid
* @author Martin Odersky
* @version 2.8
*/
trait MutableVectorViewTemplate[A,
+Coll <: mutable.Vector[_],
+This <: MutableVectorView[A, Coll] with MutableVectorViewTemplate[A, Coll, This]]
extends mutable.Vector[A] with MutableVectorTemplate[A, This] with VectorView[A, Coll] with VectorViewTemplate[A, Coll, This]
{ self =>
trait Transformed[B] extends MutableVectorView[B, Coll] with super.Transformed[B] {
def update(idx: Int, elem: B)
}
trait Sliced extends Transformed[A] with super.Sliced {
override def update(idx: Int, elem: A) =
if (idx + from < until) self.update(idx + from, elem)
else throw new IndexOutOfBoundsException(idx.toString)
}
trait Filtered extends Transformed[A] with super.Filtered {
override def update(idx: Int, elem: A) = self.update(index(idx), elem)
}
trait TakenWhile extends Transformed[A] with super.TakenWhile {
override def update(idx: Int, elem: A) =
if (idx < len) self.update(idx, elem)
else throw new IndexOutOfBoundsException(idx.toString)
}
trait DroppedWhile extends Transformed[A] with super.DroppedWhile {
override def update(idx: Int, elem: A) =
if (idx >= 0) self.update(idx + start, elem)
else throw new IndexOutOfBoundsException(idx.toString)
}
trait Reversed extends Transformed[A] with super.Reversed {
override def update(idx: Int, elem: A) = self.update(length - 1 - idx, elem)
}
/** Boilerplate method, to override in each subclass
* This method could be eliminated if Scala had virtual classes
*/
protected override def newFiltered(p: A => Boolean): Transformed[A] = new Filtered { val pred = p }
protected override def newSliced(_from: Int, _until: Int): Transformed[A] = new Sliced { val from = _from; val until = _until }
protected override def newDroppedWhile(p: A => Boolean): Transformed[A] = new DroppedWhile { val pred = p }
protected override def newTakenWhile(p: A => Boolean): Transformed[A] = new TakenWhile { val pred = p }
protected override def newReversed: Transformed[A] = new Reversed { }
}
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