What happens if you use the ^variable multiple times? Does it only
forward/move the last time it's used?

    void RecordString(string &&^arg)
    {
        some_global_string = arg; // does this move?
        some_other_global_string = arg; // does this move?
        std::cout << arg;
  }

Member functions can also be &&-qualified so the same rules should
arguably apply to them as well.