function0.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 43 行

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2002-2008, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

// $Id: Function0.scala 14670 2008-04-16 14:47:55Z washburn $

// generated by genprod on Wed Apr 16 16:46:04 CEST 2008 (with fancy comment) 

package scala


/** <p>
 *    Function with 0 parameters.
 *  </p>
 *  <p>
      In the following example the definition of
 *    <code>currentSeconds</code> is a shorthand for the anonymous class
 *    definition <code>anonfun0</code>:
 *  </p>
 *  <pre>
 *  <b>object</b> Main <b>extends</b> Application {
 *
 *    <b>val</b> currentSeconds = () => System.currentTimeMillis() / 1000L
 *
 *    <b>val</b> anonfun0 = <b>new</b> Function0[Long] {
 *      <b>def</b> apply(): Long = System.currentTimeMillis() / 1000L
 *    }
 *
 *    println(currentSeconds())
 *    println(anonfun0())
 *  }</pre>
 */
trait Function0[+R] extends AnyRef {
  def apply(): R
  override def toString() = "<function>"
  
}