Scala example source code file (GrowingBuilder.scala)

This example Scala source code file (GrowingBuilder.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

builder, elem, growable, growingbuilder, to

The GrowingBuilder.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection
package mutable

import generic._

/** The canonical builder for collections that are growable, i.e. that support an
 *  efficient `+=` method which adds an element to the collection.
 *
 *  @author Paul Phillips
 *  @version 2.8
 *  @since 2.8
 *
 *  @define Coll `GrowingBuilder`
 *  @define coll growing builder
 */
class GrowingBuilder[Elem, To <: Growable[Elem]](empty: To) extends Builder[Elem, To] {
  protected var elems: To = empty
  def +=(x: Elem): this.type = { elems += x; this }
  def clear() { elems = empty }
  def result: To = elems
}