Scala example source code file (ReplTest.scala)

This example Scala source code file (ReplTest.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

app, app, reflection, repltest, repltest, settings, settings, string, string

The Scala ReplTest.scala source code

/* NSC -- new Scala compiler
 * Copyright 2005-2011 LAMP/EPFL
 * @author Paul Phillips
 */

package scala.tools.partest

import scala.tools.nsc.Settings
import scala.tools.nsc.interpreter.ILoop
import java.lang.reflect.{ Method => JMethod, Field => JField }

/** A trait for testing repl code.  It drops the first line
 *  of output because the real repl prints a version number.
 */
abstract class ReplTest extends App {
  def code: String
  // override to add additional settings with strings
  def extraSettings: String = ""
  // override to transform Settings object immediately before the finish
  def transformSettings(s: Settings): Settings = s

  // final because we need to enforce the existence of a couple settings.
  final def settings: Settings = {
    val s = new Settings
    s.Yreplsync.value = true
    s.Xnojline.value = true
    val settingString = sys.props("scala.partest.debug.repl-args") match {
      case null   => extraSettings
      case s      => extraSettings + " " + s
    }
    s processArgumentString settingString
    transformSettings(s)
  }
  def eval() = ILoop.runForTranscript(code, settings).lines drop 1
  def show() = eval() foreach println
  
  try show()
  catch { case t => println(t) ; sys.exit(1) }
}