union
    {
        // gamesvrd <--------------> gameinfo
        REQChangeGameInfo m_reqChangeGameInfo;
    };

invalid union member class “REQChangeGameInfo” has a disallowed member function

union
    {
        // gamesvrd <--------------> gameinfo
        REQChangeGameInfo m_reqChangeGameInfo();
    };

REQChangeGameInfo 是protobuf的class，貌似union中不能放class，我知道boost::variant可以代替union。

下面的写法为什么可以，或者说REQChangeGameInfo m_reqChangeGameInfo;和REQChangeGameInfo m_reqChangeGameInfo();两种写法有什么不同？

ITPub博客

c++中关于union中放class