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On Wed, 07 Oct 2009 09:37:18 +0300, Sean Conner <> wrote:
The reason I'm using the userdata and not a lightuserdata is the former I
can attach a metatable to, which would simplify the Lua code a bit.

you _can_ set global metatable for all lightuserdata. and use
some logic in C code to detect what kind of data pointer points to, and
call appropriate functions depending on that.