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

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

I doesn't work as it is so I modified slightly lua_icxx code to accommodate
this requirement.

This is just a quick solution..

with the changed code I can do this


    void execCallback()
     {
       LuaFuncCallParams call= cb.prepCall()   // this is now public

       SWIG_Lua_NewPointerObj( L, new Foo() .... )  // push wrapped object
on the stack

       call.doCall(1);   // doCall gets extra number of params pushed on
the stack
     }


        This works.

        Maybe it can be implemented differently but I'm sure this could be
a popular feature for lua_icxx as I think the combo swig + lua_icxx is a
winner!


   Dom


On Sun, Feb 5, 2012 at 5:26 PM, Domenico Mangieri <dm...@gm...> wrote:

> 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
>>
>>
>