bug361.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 19 行

// $Id: bug361.scala 11911 2007-06-05 15:57:59Z odersky $

class Bug361Global extends Bug361Trees;

abstract class Bug361Trees { self: Bug361Global =>

  abstract class Tree {
    var pos: int = 0;
  }

  object posAssigner {
    def atPos[T <: Tree](pos: int, tree: T): T = {
      tree.pos = pos; tree
    }
  }

  def atPos[T <: Tree](pos: int)(tree: T): T = posAssigner.atPos(pos, tree);
}