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On Nov 25, 2006, at 6:09 PM, Ram Firestone wrote:

__gc only works for userdata values.

Ah, I was working off the info at:

That stinks. There's a lot of busy-work in C that I'd rather do in Lua. Too bad.

Thanks for the correction.


-----Original Message-----
From: [mailto:lua-] On Behalf Of
joseph stewart
Sent: Saturday, November 25, 2006 3:05 PM
To: Lua list
Subject: Can I use __gc metamethod directly from Lua?

Hello all,

I'm developing a library binding and to minimize the amount of 'C'
code I need to write, I want to have Lua handle the __gc metamethod.
At first glance, this doesn't appear to do what I want. Here's the
essence of what I'm doing:

mt = {}
mt.__gc = function() print("gc me") end
t = {1,2,3}
setmetatable(t, mt)
t = nil

I would expect to see "gc me" printed after the collectgarbage
function call, but I don't.

Am I completely on the wrong track? I've used __gc from 'C' code and
more or less get what I expect. Is __gc usable from Lua code?

Thanks in advance for any help! When the library is done, I'll share
it with y'all.