Discarding shared_ptrs

Hi,

I am passing boost::shared_ptr<T> to Lua functions, which works well.

Unfortunately, the shared_ptr then keeps an extra use_count (held in the 
lua table), even if the function is finished. How do I release this usage?

Set to nil? Use a Policy? Pass some other sort of pointer? I'd love to 
be able to use the functionality of boost::weak_ptr in lua!

Any advice welcome

thanks

Simon



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