Re: Using lunar.h with 5.1?

[Hakki Dogusan <dogusanh@...>]

Hi,

Mike Crowe wrote:
> Hi folks,
>
> Has anybody linked c++ programs with 5.1 and lunar.h before?  I've 
> gotten my program to compile with lunar.h with a few tweaks, but I don't 
> know if there are hidden gotcha's to be aware of.
>
> [snip code]
>
> it all seems to work.
>
> Mainly, I'm worried that this example doesn't use all the features of 
> lunar.h, and when we dive into it, we get bit by something we don't 
> anticipate.

I used luna(r).

- I didn't find a way to access class' member fields directly (or add 
new members to it in script).
- I added a get method (modified from check):

  static T *get(lua_State *L, int narg) {
    userdataType *ud = static_cast<userdataType*>(lua_touserdata(L, narg));
    if(!ud) return NULL;
    return ud->pT;  // pointer to T object
  }

I used this for something like:

class A {};
class AA : public A {};
class AB : public A {};
Luna<AA>::Register(L);
Luna<AB>::Register(L);

X* get_obj(lua_State* L) {
  A* o=NULL;
  o = Luna<AA>::get(L, 1);
  if (o) return o->x;
  o = Luna<AB>::get(L, 1);
  if (o) return o->x;
  luaL_argcheck(L, o != NULL, 1, "'...' expected");
}


> TIA
>
> Mike


--
Regards,
Hakki Dogusan