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-rw-r--r--src/library/scalax/collection/generic/mutable/VectorView.scala95
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diff --git a/src/library/scalax/collection/generic/mutable/VectorView.scala b/src/library/scalax/collection/generic/mutable/VectorView.scala
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--- a/src/library/scalax/collection/generic/mutable/VectorView.scala
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-/* __ *\
-** ________ ___ / / ___ Scala API **
-** / __/ __// _ | / / / _ | (c) 2003-2009, LAMP/EPFL **
-** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
-** /____/\___/_/ |_/____/_/ | | **
-** |/ **
-\* */
-
-// $Id: Sequence.scala 16092 2008-09-12 10:37:06Z nielsen $
-
-
-package scalax.collection.generic.mutable
-
-import collection.mutable.Vector
-import collection.mutable.Vector._
-
-/** A non-strict projection of an iterable.
- * @author Sean McDirmid
- * @author Martin Odersky
- * @note this should really be a virtual class of SequenceFactory
- */
-trait VectorView[+UC[B] <: Vector[B], A] extends SequenceView[UC, A] with Vector[A] {
-self =>
-
- /** refined from Iterable.View */
- val origin: Vector[_]
-
- trait Transformed[B] extends super.Transformed[B] with VectorView[UC, B] {
- override val origin = self
- override def elements: Iterator[B] = new Elements(0, length)
- override protected def asCC = asInstanceOf[VectorView[UC, B]]
- }
-
- class Appended(that: Vector[A]) extends super.Appended[A](that) with Transformed[A] {
- override def update(idx: Int, elem: A) {
- val ll = self.length
- if (idx < ll) self.update(idx, elem) else that.update(idx - ll, elem)
- }
- }
-
- class Sliced(from: Int, to: Int) extends super.Sliced(from, to) with Transformed[A] {
- override def update(idx: Int, elem: A) {
- if (idx >= 0 && idx < length) self.update(idx + from, elem)
- else throw new IndexOutOfBoundsException(idx.toString)
- }
- override def slice(from1: Int, to1: Int) =
- new self.Sliced(from + (from1 min length max 0) , to + (to1 min length max 0))
- }
-
- class Reversed extends super.Reversed with Transformed[A] {
- override def update(idx: Int, elem: A) {
- self.update(length - 1 - idx, elem)
- }
- }
-
- class Zipped[B](that: Vector[B]) extends super.Zipped[B](that) with Transformed[(A, B)] {
- override def update(idx: Int, elem: (A, B)) {
- self.update(idx, elem._1)
- that.update(idx, elem._2)
- }
- }
-
- def ++(that: Vector[A]): VectorView[UC, A] =
- new Appended(that).asCC
-
- override def reverse: VectorView[UC, A] =
- (new Reversed).asCC
-
- private def toVector[B](xs: Iterable[B]): Vector[B] = xs match {
- case ras: Vector[_] => ras.asInstanceOf[Vector[B]]
- case _ => Vector() ++ xs
- }
-
- override def zip[B](that: Iterable[B]): VectorView[UC, (A, B)] =
- new Zipped(toVector(that)).asCC
-
- override def zipWithIndex: VectorView[UC, (A, Int)] =
- zip((0 until length).asInstanceOf[Null]) // !@!
- override def take(n: Int): VectorView[UC, A] =
- slice(0, n)
- override def drop(n: Int): VectorView[UC, A] =
- slice(n, Math.MAX_INT)
- override def splitAt(n: Int): (VectorView[UC, A], VectorView[UC, A]) = (take(n), drop(n))
- override def slice(from: Int, until: Int): VectorView[UC, A] =
- new Sliced(from, until).asCC
- override def takeWhile(p: A => Boolean): VectorView[UC, A] =
- take(prefixLength(p))
- override def dropWhile(p: A => Boolean): VectorView[UC, A] =
- drop(prefixLength(p))
- override def span(p: A => Boolean): (VectorView[UC, A], VectorView[UC, A]) = {
- val n = prefixLength(p)
- (take(n), drop(n))
- }
-}
-