Scala example source code file (EvalLoop.scala)

This example Scala source code file (EvalLoop.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

annotation, compiler, eofexception, evalloop, nsc, string, unit

The EvalLoop.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author  Martin Odersky
 */

package scala.tools.nsc

import scala.annotation.tailrec
import java.io.EOFException

trait EvalLoop {
  def prompt: String

  def loop(action: (String) => Unit) {
    @tailrec def inner() {
      Console.print(prompt)
      val line = try Console.readLine() catch { case _: EOFException => null }
      if (line != null && line != "") {
        action(line)
        inner()
      }
    }
    inner()
  }
}