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Nick Trout wrote:
> Here is some code to play with. The first bit is your userdata binding, the
> second bit is the Lua register operator. Its a bit like trying to do friend
> operators in C++. You have to specify the operator explicitly using regop.
> Hope this answers your question.

Yes. I thought I would need something like this. I'm not entirely happy
with the extra steps (one extra function call and a lookup in a table),
but this method is indeed pratical and general. 

Thank you very much.

Oscar Lazzarino