gistfile1.txt

def producerToIterator[L](prod : =>L):Iterator[L] = new Iterator[L] {
  private var current: Option[L] = None
  def hasNext = current != None || {
    current = prod match {
      case null => None
      case x => Some(x);
    };
    current != None;
  }
  
  def next = { 
   hasNext; 
   val result = current;
   current = None;
   result.get
  }
   
}