Method Bind

Plugins/UnLua/Source/UnLua/Private/Registries/ObjectRegistry.cpp:106–156

    }

    int FObjectRegistry::Bind(UObject* Object)
    {
        if (const auto Exists = ObjectRefs.Find(Object))
        {
            if (*Exists != LUA_NOREF)
                return *Exists;
        }

        const auto L = Env->GetMainState();

        int OldTop = lua_gettop(L);

        lua_getfield(L, LUA_REGISTRYINDEX, REGISTRY_KEY);
        lua_pushlightuserdata(L, Object);
        lua_newtable(L); // create a Lua table ('INSTANCE')
        PushObjectCore(L, Object); // push UObject ('RAW_UOBJECT')
        lua_pushstring(L, "Object");
        lua_pushvalue(L, -2);
        lua_rawset(L, -4); // INSTANCE.Object = RAW_UOBJECT

        // in some case may occur module or object metatable can 
        // not be found problem
        const auto Class = Object->IsA<UClass>() ? static_cast<UClass*>(Object) : Object->GetClass();
        const auto ClassBoundRef = Env->GetManager()->GetBoundRef(Class);
        int32 TypeModule = lua_rawgeti(L, LUA_REGISTRYINDEX, ClassBoundRef); // push the required module/table ('REQUIRED_MODULE') to the top of the stack
        int32 TypeMetatable = lua_getmetatable(L, -2); // get the metatable ('METATABLE_UOBJECT') of 'RAW_UOBJECT' 
        if (TypeModule != LUA_TTABLE || TypeMetatable == LUA_TNIL)
        {
            lua_pop(L, lua_gettop(L) - OldTop);
            return LUA_REFNIL;
        }

#if ENABLE_CALL_OVERRIDDEN_FUNCTION
        lua_pushstring(L, "Overridden");
        lua_pushvalue(L, -2);
        lua_rawset(L, -4);
#endif
        lua_setmetatable(L, -2); // REQUIRED_MODULE.metatable = METATABLE_UOBJECT
        lua_setmetatable(L, -3); // INSTANCE.metatable = REQUIRED_MODULE
        lua_pop(L, 1);

        lua_pushvalue(L, -1);
        const auto Ret = luaL_ref(L, LUA_REGISTRYINDEX);
        ObjectRefs.Add(Object, Ret);

        FUnLuaDelegates::OnObjectBinded.Broadcast(Object); // 'INSTANCE' is on the top of stack now

        lua_rawset(L, -3);
        lua_pop(L, 1);
        return Ret;
    }

    bool FObjectRegistry::IsBound(const UObject* Object) const
    {