alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Scala example source code file (TraversableView.scala)

This example Scala source code file (TraversableView.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, a, c, canbuildfrom, coll, coll, iterator, nobuilder, nobuilder, traversable, traversableview, traversableview, traversableviewlike, unsupportedoperationexception

The Scala TraversableView.scala source code

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

package scala.collection

import generic._
import mutable.Builder
import TraversableView.NoBuilder

/** A base trait for non-strict views of traversable collections.
 *  $traversableViewInfo
 */
trait TraversableView[+A, +Coll] extends TraversableViewLike[A, Coll, TraversableView[A, Coll]] with GenTraversableView[A, Coll] { }

/** An object containing the necessary implicit definitions to make
 *  `TraversableView`s work. Its definitions are generally not accessed directly by clients.
 */
object TraversableView {
  class NoBuilder[A] extends Builder[A, Nothing] {
    def +=(elem: A): this.type = this
    def iterator: Iterator[A] = Iterator.empty
    @deprecated("use `iterator' instead", "2.8.0")
    def elements = iterator
    def result() = throw new UnsupportedOperationException("TraversableView.Builder.result")
    def clear() {}
  }
  type Coll = TraversableView[_, C] forSome {type C <: Traversable[_]}
  implicit def canBuildFrom[A]: CanBuildFrom[Coll, A, TraversableView[A, Traversable[_]]] = 
    new CanBuildFrom[Coll, A, TraversableView[A, Traversable[_]]] { 
      def apply(from: Coll) = new NoBuilder 
      def apply() = new NoBuilder 
    }
}

Other Scala examples (source code examples)

Here is a short list of links related to this Scala TraversableView.scala source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.