Re: Can I use __gc metamethod directly from Lua?

[Michael Broughton <mbobowik@...>]

The __gc meta-method only works on full userdata. It does not get called 
for regular Lua tables.

Mike


joseph stewart wrote:
> 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
> collectgarbage("collect")
>
> 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.
>
> -joe