Scala example source code file (History.scala)

This example Scala source code file (History.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

compiler, history, int, list, nil, nohistory, nsc

The History.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author Paul Phillips
 */

package scala.tools.nsc
package interpreter
package session

/** An implementation-agnostic history interface which makes no
 *  reference to the jline classes.  Very sparse right now.
 */
trait History {
  def asStrings: List[String]
  def index: Int
  def size: Int
}
object NoHistory extends History {
  def asStrings       = Nil
  def index           = 0
  def size            = 0
}