Friendship inheritance

[Marcin Vorbrodt]

Is friendship inherited? Meaning if:

class Base {
public:
friend FriendClass;
};

class Derived : public Base {
}

Is FriendClass also a friend of Derived? Or does the friendship need to be
explicitly granted?

Thanks,
Martin

[Andrey Tarasevich]

Marcin Vorbrodt wrote:

Is friendship inherited? Meaning if:

class Base {
public:
friend FriendClass;
};

class Derived : public Base {
}

Is FriendClass also a friend of Derived?
No.
Or does the friendship need to be explicitly granted?

Yes.

--
Best regards,
Andrey Tarasevich
Brainbench C and C++ Programming MVP

[Artie Gold]

Andrey Tarasevich wrote:

Marcin Vorbrodt wrote:

Is friendship inherited? Meaning if:

class Base {
public:
friend FriendClass;
};

class Derived : public Base {
}

Is FriendClass also a friend of Derived?

No.

Or does the friendship need to be explicitly granted?

Yes.

Just to add (because I think it's well expressed) -- take a look at:

http://www.parashift.com/c++-faq-lite/friends.html

BTW - reading through the entire FAQ would be a good idea -- and
remarkably entertaining, too!

HTH,
--ag

--
Artie Gold -- Austin, Texas

[Shane Beasley]

"Marcin Vorbrodt" <mv*****@eos.ncsu.edu> wrote in message news:<bj**********@uni00nw.unity.ncsu.edu>...

Is friendship inherited?

Friendship is not inherited, transitive, or reciprocal. Apparently,
enough people ask this that it's a FAQ:

<http://www.parashift.com/c++-faq-lite/friends.html>

While you're there, read the rest of the FAQs:

<http://www.parashift.com/c++-faq-lite/>

There is much knowledge to be had from those pages. :)

- Shane

[Big Brian]

> Is friendship inherited? Meaning if:

class Base {
public:
friend FriendClass;
};

class Derived : public Base {
}

Is FriendClass also a friend of Derived? Or does the friendship need to be
explicitly granted?

IMHO, you should take 5 minutes and try it with our favorite standard C++ compiler.