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Scala example source code file (GenIterableViewLike.scala)

This example Scala source code file (GenIterableViewLike.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Scala tags/keywords

a, b, b, coll, coll, geniterable, geniterableview, geniterableviewlike, iterator, iterator, this, transformed, transformed, z

The Scala GenIterableViewLike.scala source code

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

package scala.collection



import generic._
import TraversableView.NoBuilder



trait GenIterableViewLike[+A, 
                          +Coll, 
                          +This <: GenIterableView[A, Coll] with GenIterableViewLike[A, Coll, This]]
extends GenIterable[A] with GenIterableLike[A, This] with GenTraversableView[A, Coll] with GenTraversableViewLike[A, Coll, This] {
self =>
  
  trait Transformed[+B] extends GenIterableView[B, Coll] with super.Transformed[B] {
    def iterator: Iterator[B]
    override def foreach[U](f: B => U): Unit = iterator foreach f
    override def toString = viewToString
  }

  trait EmptyView extends Transformed[Nothing] with super.EmptyView {
    final def iterator: Iterator[Nothing] = Iterator.empty
  }

  trait Forced[B] extends super.Forced[B] with Transformed[B] {
    def iterator = forced.iterator
  }

  trait Sliced extends super.Sliced with Transformed[A] {
    def iterator: Iterator[A] = self.iterator.slice(from, until)
  }

  trait Mapped[B] extends super.Mapped[B] with Transformed[B] {
    def iterator = self.iterator map mapping
  }

  trait FlatMapped[B] extends super.FlatMapped[B] with Transformed[B] {
    def iterator: Iterator[B] = self.iterator flatMap mapping
  }
    
  trait Appended[B >: A] extends super.Appended[B] with Transformed[B] {
    def iterator = self.iterator ++ rest
  }

  trait Filtered extends super.Filtered with Transformed[A] {
    def iterator = self.iterator filter pred
  }
    
  trait TakenWhile extends super.TakenWhile with Transformed[A] {
    def iterator = self.iterator takeWhile pred
  }

  trait DroppedWhile extends super.DroppedWhile with Transformed[A] {
    def iterator = self.iterator dropWhile pred
  }

  trait Zipped[B] extends Transformed[(A, B)] {
    protected[this] val other: GenIterable[B]
    def iterator: Iterator[(A, B)] = self.iterator zip other.iterator
    final override protected[this] def viewIdentifier = "Z"
  }
  
  trait ZippedAll[A1 >: A, B] extends Transformed[(A1, B)] {
    protected[this] val other: GenIterable[B]
    protected[this] val thisElem: A1
    protected[this] val thatElem: B
    final override protected[this] def viewIdentifier = "Z"
    def iterator: Iterator[(A1, B)] = 
      self.iterator.zipAll(other.iterator, thisElem, thatElem)
  }

}


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