Re: How to pass class pointer to lua function ?

[Arvid Norberg <c99ang@...>]

At 2003-06-07 11:51, you wrote:
> Hi
>
> Simple question, how to pass class pointer as argument to LUA function ?
> I use LUA 5.0 And LuaBind
> I've registered some class members:
>
> luabind::class_<c_FOO>(g_L, "c_FOO")
>                             .def("Do", &c_FOO::Do)
>                             .def("DoOther", &c_FOO::DoOther)
>                             ;
>
> And now (in C++) I have method like this:
>
> void c_FOO::CallSomeLuaFunction()
> {
>   //
>   // And now I need to call 'function Lua_Foo(arg1)'
>   // where arg1 is a 'this'
>   // and inside call some of c_FOO methods
>   // arg1:Do() for example
>   //
>
>   lua_pushstring(g_L, "LuaFoo");
>   lua_gettable(g_L, LUA_GLOBALSINDEX);
>   lua_pushstring(g_L, "this");
>   lua_call(g_L, 1, 0);
>
>   //
>   // The code above do nothing, how to modify it ???
>   //
> }

What you can do inside your CallSomeLuaFunction() is:

luabind::call_function<void>(L, "LuaFoo", this);

If the 'LuaFoo'-function returns something you can give the return type 
instead of void as template parameter.
It will use the appropriate converters to convert the 'this'-pointer to a 
lua value.

You could have a look at the luabind::functor template too.


There is a mailing list for luabind which may be more suited for this kind 
of question.
http://lists.sourceforge.net/lists/listinfo/luabind-user


---
Arvid Norberg