If there are no non - blank , non - comment lines between the current cursor position and the end of the file 如果在当前光标位置到文件末尾之间没有非空、非注释行,则返回
Because the cursor is associated with the dynamic list of messages in the queue , the enumeration reflects any modification you make to the messages in the queue , if the message is beyond the current cursor position 因为游标与队列中消息的动态列表关联,所以如果队列中的消息在当前游标位置的后面,则枚举反映您对这些消息所做的任何修改。