Function GetUserType

engine/script/src/script.cpp:803–833

    }

    uint32_t GetUserType(lua_State* L, int user_data_index)
    {
        DM_LUA_STACK_CHECK(L, 0);
        lua_pushvalue(L, user_data_index);
        // [-1] user data
        lua_Integer type_hash = 0;
        if (lua_type(L, -1) == LUA_TUSERDATA)
        {
            if (lua_getmetatable(L, -1))
            {
                // [-1] meta table
                // [-2] user data

                lua_pushinteger(L, SCRIPT_METATABLE_TYPE_HASH_KEY);
                // [-1] SCRIPT_METATABLE_TYPE_HASH_KEY
                // [-2] meta table
                // [-3] user data

                lua_rawget(L, -2);
                // [-1] type hash
                // [-2] meta table
                // [-3] user data

                type_hash = lua_tointeger(L, -1);
                lua_pop(L, 2);
                // [-1] user data
            }
        }
        lua_pop(L, 1);
        return (uint32_t)type_hash;
    }

    void* ToUserType(lua_State* L, int user_data_index, uint32_t type_hash)
    {