Is friendship inherited in C++?

问题

Suppose I have a Base class:

class Base {
    friend SomeOtherClass;
};

And there is another (different) class that inherits from Base:

class AnotherClass : public Base {}

Is friendship inherited as well?

回答1:

In principle, a derived class inherits every member of a base class except:

* its constructor and its destructor
* its operator=() members
* its friends

So, no. Friends are not inherited.

回答2:

No it isn't.

Edit: To quote from the C++ Standard, section 11.4/8

Friendship is neither inherited nor transitive.

回答3:

No it isn't, as documented here: http://www.parashift.com/c++-faq-lite/friends.html#faq-14.4

来源：https://stackoverflow.com/questions/597857/is-friendship-inherited-in-c