Re: property based C++ API with Lunar?

[Hakki Dogusan <dogusanh@...>]

Hi,

Michael Bauroth wrote:
> Sorry that I ask: what do you mean with a table? Have you eventually a 
> short sample for me? Unfortunately I have to learn Lua, C++ in depth and 
> the bridge stuff at the same time.
>
> Best Regards
> Micha
>
>
> Ignacio Burgueño schrieb:
> > Michael Bauroth wrote:
> > > Hi,
> > >
> > > I have implemented your solution, but had to change two lines because 
> > > of a compiler error (VS2008). What do you mean?
> > > [snip]
> > >
> > > Just another question. What can I change to use the same solution as 
> > > well for methods with more than one parameter, e.g. instead of 
> > > btn:SetPosition( 1, 1 ) I want to use btn.Position = 1, 1?
> >
> > I don't think this is possible since the __newindex and __index 
> > metamethods don't take multiple values. There was some discussion of 
> > the list some time ago about this.
> >
> > What you might do instead is something like:
> > btn.Position = {1,1}
> >
> > And deal with a table in your C++ implementation.
> >
> >
> > Regards,
> > Ignacio

Maybe, something like that..

-- Lua
btn.Position = {1,1}


// C
LCB_IMPL_SET(Button, Position)
{
    luaL_checktype(L, 1, LUA_TTABLE);
    lua_rawgeti(L, 1, 1);
    int x = lua_tonumber(L, -1);
    lua_pop(L, 1);
    lua_rawgeti(L, 1, 2);
    int y = lua_tonumber(L, -1);
    lua_pop(L, 1);

    button->SetPosition(x,y);
    return 0;
}


--
Regards,
Hakki Dogusan