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C-/C++-Quelltext

class IObject
{
  public:
    virtual ~IObject() {};
    virtual const char* classname() const ;
    virtual bool implements(const char* interface) const;;
};

int iobject_implements(lua_State* L)
{
  int argc = lua_gettop(L);
  if (argc != 2) // test number of arguments: object pointer + methode parameter

  {
    luaL_error(L,"%s","wrong number of arguments, 2 expected");
  }
  luaL_checktype(L, 1, LUA_TUSERDATA);
  void** udata = (void**)lua_touserdata(L,1);

  // type check ...


  const char* s = luaL_checkstring(L,2);
  // cast void* to correct type and call methode implements

  // push the string on the lua stack as return argument 

  lua_pushboolean(L,static_cast<IObject*>(*udata)->implements(s)); 
  // one return value

  return 1;
}