Re: how to store a ref to a table without registry?

["Chris Swetenham" <cswetenham@...>]

If I understand correctly, you want to be able to store a reference to the 
object from the C++ side without preventing it from being garbage collected? 
If this is the case, then you can create a table in the registry that has 
weak values, and store a reference in that table. See section 2.10.2 of the 
reference manual: http://www.lua.org/manual/5.1/manual.html#2.10.2

Hope that helps!

----- Original Message ----- 
From: "joerg piringer" <joerg@piringer.net>
To: "Lua list" <lua@bazar2.conectiva.com.br>
Sent: Thursday, March 20, 2008 11:17 AM
Subject: how to store a ref to a table without registry?


> hallo all,
> i am pretty new to lua so please forgive me if this question has been 
> asked before:
> i'd like to access a function (or rather a method) inside a specific table 
> from c++. how can i do that without storing the reference to the table in 
> the registry?
> the problem is when i store the reference in the registry it won't get 
> garbage collected, right?
>
> i have the following code:
>
> o = TestObject()
> o.testFunc = function() print "test" end
>
> TestObject() is a c++ function that returns a table with a userdata inside 
> (the actual c++ object).
> now i'd like to call my testFunc from the c++ object that's inside the 
> table.
> i did it with a reference (in the registry) to self (the table) until i 
> tried to garbage collect the objects...
>
> best
> joerg
>
> --
> http://joerg.piringer.net
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