Signature matching, manual intervention.

So I was talking with JW (John W. since there are two Johns I keep 
having to refer to)  and he asked a rather simple question when I was 
mentioning the Luabind signature matching:

   How can you choose a particular overload to call, if you know which 
one you want?

In particular the example he cited was of having two methods overloaded 
on different subclasses of a common class. So my almost immediate answer 
was:

   You can't, since you'll get an error in C++ anyway.

But then I realized that one can, with some clever casting, and function 
pointer. So my question now is:

   Should forcing a call to a specific overload be supported?

And the obvious follow up: How?


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