C ++：限制派生类中的方法访问(C++ : Restrict method access in derived class)

 我有一个Message类的对象，可以编写并随后更新。 据我所知，MessageUpdate IS-A MessageWrite： 
 
class MessageWrite
{
  protected:
    void setVersion(int version_) {...}
    void setReceiveTime(int tmReceive_) {...}

    Message _msg;
};


class MessageUpdate:public MessageWrite
{
    //ONLY setVersionShould be accessible here, NOT setReceiveTime
};
 
 是否有方法访问级别和继承级别的组合可以帮助实现这一目标？ 
 
 我知道MessageUpdate可以简单地成为基类，但是有一些问题：如果我想扩展消息类，它会导致菱形模式。 考虑： 
 
class MessageUpdate {...};
class MessageWrite: public MessageUpdate {...};


//Now, while extending:
class AdminMessageUpdate:public MessageUpdate {...};
class AdminMessageWrite: public AdminMessageUpdate, public MessageWrite //DIAMOND Pattern!!
 
 我对继承理解的差距在哪里？ 没有多重继承（如后面的代码片段所示），有没有完全不同的方法来实现这种逻辑？ 

I have an object of class Message, which can be written and subsequently updated. As far as I can see, MessageUpdate IS-A MessageWrite:
 
class MessageWrite
{
  protected:
    void setVersion(int version_) {...}
    void setReceiveTime(int tmReceive_) {...}

    Message _msg;
};


class MessageUpdate:public MessageWrite
{
    //ONLY setVersionShould be accessible here, NOT setReceiveTime
};
 
Is there a combination of method access level and inheritance level that can help achieve this?
 
I know that MessageUpdate can be simply made base class, but there's the rub: it leads to diamond pattern in case i want to extend the message class. Consider:
 
class MessageUpdate {...};
class MessageWrite: public MessageUpdate {...};


//Now, while extending:
class AdminMessageUpdate:public MessageUpdate {...};
class AdminMessageWrite: public AdminMessageUpdate, public MessageWrite //DIAMOND Pattern!!
 
Where'e the gap in my understanding of inheritance? And is there any completely different way to achieve this logic without the multiple inheritance (as shown in latter code piece)?

原文：https://stackoverflow.com/questions/10074407