Re: [Lua-icxx-users] lua_icxx + swig

[Domenico M. <dm...@gm...>]

Hi ..  more on this..

I found that I can use  SWIG_Lua_NewPointerObj  provided by swig generate
file  to create the wrapping object


    void execCallback()
    {
       SWIG_Lua_NewPointerObj( L, new Foo() .... )

       cb();
    }

SWIG_Lua_NewPointerObj pushes the object into lua stack.

Now the question is, can I call cb with no args given the pointer is
already in the stack  ?

I'll give it a try..

Dom



On Sun, Feb 5, 2012 at 3:34 PM, Domenico Mangieri <dm...@gm...> wrote:

> Hi,
>
> I'm playing around with lua_icxx. I find it very useful with its unique
> approach to lua calls within c++.
>
> I'm currently using swig to wrap a large library and I'm using lua_icxx to
> provide callback supports from within c++ into lua.
>
> Here is an example
>
> *c++ *
>
> // Note : Foo is wrapped by swig
>
> class Foo
> {
>   public:
>
>     LuaFuncRef cb;
>
>     void registerCallback(const char* cb)
>     {
>         cb = _lua.eval(cb);
>     }
>     .....
>
>     void execCallback()
>     {
>        cb();
>     }
> };
>
>
>
>
>
> *lua :*
>
>
> function test()
>     print("cool")
> end
>
> f = Foo()
> f:registerCallback("test");
>
>
>
>
> That's all good.
>
> My problem now is to make use of swig wrap to pass c++ objects to lua
> callback;
>
> Something like this
>
>     void execCallback()
>     {
>        cb( new Foo );
>     }
>
> The callback works fine with basic types but not for UDT.
>
> Any idead how that could be solved ?
>
>
> Thank you for sharing this lib.
>
> Dom
>
>