evalloop.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 23 行

/* NSC -- new Scala compiler
 * Copyright 2005-2007 LAMP/EPFL
 * @author  Martin Odersky
 */
// $Id: EvalLoop.scala 12090 2007-06-19 17:58:07Z michelou $

package scala.tools.nsc

trait EvalLoop {

  def prompt: String

  def loop(action: (String) => Unit) {
    Console.print(prompt)
    val line = Console.readLine
    if ((line ne null) && line.length() > 0) {
      action(line)
      loop(action)
    }
  }

}