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- Subject: Re: lua hacking wondering
- From: Dimitris Papavasiliou <jimmyp@...>
- Date: Wed, 23 Jun 2004 13:54:02 +0300
Roberto Ierusalimschy wrote:
Wouldn't it be possible to store a pointer the the internal table
structure of the metatable that is ssigned to each table/udata? That way
the cost of checking wether a metamethod exists would be one pointer
lookup and some bit testing wich is negligible (plus maybe some overhead
in lua_setmetatable), and we would be able to have our precious
__settable ,__gettable and maybe __next metamethods.
The metatable itself has these bits. When we modify a table there
is no way to know which objects use it as a metatable, so there would
be no way to reset their bits.