void make_instance(lua_State* L, P p)
{
std::pair<class_id, void*> dynamic = get_dynamic_class(L, get_pointer(p));
class_rep* cls = get_pointee_class(L, p, dynamic.first);
if (!cls)
{
throw std::runtime_error("Trying to use unregistered class");
}
object_rep* instance = push_new_instance(L, cls);
typedef pointer_holder<P> holder_type;
void* storage = instance->allocate(sizeof(holder_type));
try
{
new (storage) holder_type(p, dynamic.first, dynamic.second);
}
catch (...)
{
instance->deallocate(storage);
lua_pop(L, 1);
throw;
}
instance->set_instance(static_cast<holder_type*>(storage));
}
class_rep* get_pointee_class(lua_State* L, P const& p, class_id dynamic_id)
{
lua_pushliteral(L, "__luabind_class_map");
lua_rawget(L, LUA_REGISTRYINDEX);
//class_map const& classes = *static_cast<class_map*>(
//lua_touserdata(L, -1));
void *pclasses = lua_touserdata(L, -1);
lua_pop(L, 1);
if(!pclasses)
{
return 0;
}
class_map const& classes = *static_cast<class_map*>(pclasses);
//lua_pop(L, 1);
class_rep* cls = classes.get(dynamic_id);
if (!cls)
cls = get_pointee_class(classes, get_pointer(p));
return cls;
}
