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On Mon, Sep 14, 2009 at 7:55 AM, Juris Kalnins <> wrote:
> That's harder. Currently it's a pointer to something that can be put in GC
> list, which excludes nil, bools, numbers and lightuserdata. Changing that
> would be a much bigger patch, and would increase size of userdata header.

You could use a C NULL pointer to represent Lua nil, but I'm not sure
how much that would increase the complexity (or not).