Re: how does GC work with complex expressions using metamethods?

[Doug Currie <doug.currie@...>]

On Aug 16, 2009, at 2:54 PM, Michael Newberry wrote:

> No, I returned both lightuserdata and the metatable containing the  
> GC method.

You did not return (full) userdata. You returned lightuserdata. We are  
all telling you, over and over again, this won't work.

> I also tried returning the pointer to the userdata using  
> lua_pushlightuserdata and that made no difference.

lua_pushlightuserdata does not return (full) userdata.

lua_newuserdata pushes the (full) userdata on the Lua stack. That is  
what you need to return from your function.

> Remember I am returning two values, and I am assigning the second  
> value to a table element back in the lua code. The two return values  
> are stored in a table which I has setup as a class.

That doesn't help since neither is the (full) userdata you need to  
store.

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