RE: Lua oop?

["Kevin Baca" <lualist@...>]

Title: Message

Check this out:

 

http://lua-users.org/wiki/TutorialDirectory

 

And especially these:

 

http://lua-users.org/wiki/ObjectOrientationTutorial

http://lua-users.org/wiki/MetamethodsTutorial

 

-----Original Message-----
From: lua-bounces@bazar2.conectiva.com.br [mailto:lua-bounces@bazar2.conectiva.com.br] On Behalf Of Ando Sonenblick
Sent: Saturday, July 26, 2003 1:38 PM
To: lua@bazar2.conectiva.com.br
Subject: Lua oop?

> Gang,
>
> I’m developing an animation engine that will have 
>   user level scripting implemented in lua (I’ll be embedding lua into my c++ 
>   app).  I’m perusing tons of websites, reading up on the lua.org 
>   documentation and so on to learn lua, how to embed it, extend it, etc.. 
>    
>
> One thing I am not finding any real info on is any object 
>   oriented programming aspects of lua.   As of now, I’m not needing 
>   inheritance, encapsulation, etc.  Well, instead of saying what I don’t 
>   need, why don’t I simply say what I do need, and hopefully someone can tell me 
>   if it’ll be possible:
>
> In my C++ code I have, say, a widget 
>   class:
>
> class Widget
> {
>     long 
>      aValue;
>
> public:
>
>     void 
>      SetValue(long v) { aValue = v; 
>   };
>     long    GetValue(void) { return 
>   aValue; };
>
> };
>
> Now, I want to make this object available for 
>   manipulation in a lua script.  So say the script is something like 
>   this:
>
> function main(widget) 
>              -- I need 
>   first to be able to pass things to a function (but I believe that the stack 
>   calls allow this easily 
>   enuf)
>
>     widget:SetValue(10); 
>           -- important to get the “:” 
>   operator to bind an object reference to a 
>   method
>     print(widget:GetValue());   -- 
>   displays 10
>
> end
>
> So, that’s my initial prime objective: having 
>   lua access my C/C++ objects in a clean OOP syntactic way. 
>      I’ve seen some things like tolua and other C++ wrappers, but 
>   I’m looking for info on how they do what they do, not just getting a tool to 
>   do it.
>
> So, can anyone give me some pointers here?
>
> Thanks 
>   much,
> Ando
> -----------------
> SpriTec 
>   Software
> www.spritec.com