Re: AW: Standard metatable

[herviou <herviou@...>]

Sebastian Rohde wrote:

> Does anybody know something about this? Or did I miss something in the
> documentation?
>
> I wrote:
>  
>
> > While working on our lua_State serialization I found that lua tables seem
> > to have a metatable even if it seems that none has been set by the user or
> > by our code. Is that correct? 
> >    
do you have an example because I don't see when It can happen instead 
when you specify
explicity the metatable in lua or in C

> t={}
> =getmetatable(t)
nil

So In lua to specify the metatable

> t.mt={}
> setmetatable(t,t.mt)
> =getmetatable(t)
table: 0x8619270


And in C

UserData *a = (UserData *)lua_newuserdata(L, sizeof(UserData)); -- a table
luaL_newmetatable(L, "SomeName");
lua_setmetatable(L,-2);



Don't know if it helps...

dh.

> > Can this metatable be safely ignored and how can I distinguish this
> > metatable from user defined to ignore it during serialization? (And why 
> > did this metatable not have this standard metatable?)
> >    
>
>
>  
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