Re: Register an allocated object

Hi there!

Short answer: Yes.

However it depends on who should 'own' the object and destruct it when  
the time comes. This is how I do it, however someone may have a better  
alternative.

First the easy way, where the class instance is still 'owned' by the C+ 
+ side of things:

Assuming your example code and 'MyClass' has been bound....

globals(L)["a"] = a;	// Easy huh?

It gets tricky should you want the Lua script take responsibility of  
the instance and destruct it when finished with it.  You'll need  
something like:

Lua:
function setglobal( key, value )
	_G[key] = value
end

C++:
object setglobal = globals(L)["setglobal"];

setglobal( "a", a )[adopt(_2];	// Kinda roundabout but works.

I'm not sure if there is another way to have Lua 'adopt' the value.  I  
haven't really looked very hard though ;-)

Regards,

Nigel Atkinson


On 30/04/2012, at 1:10 PM, Thales Luis Rodrigues Sabino wrote:

> Is there a way to register an existing object within lua?
>
> For instance.
>
> MyClass *a = new MyClass();
> a->myMember = 30;
>
> Is there a way to register object a so in lua use it like
>
> print(a.myMember)?
>
> Thanks
>
> -- 
> Anyday, anytime.
>
> http://www.capimlokura.com.br
>
> Thales Luis Rodrigues Sabino
> TLuisRS
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