Virtual Inheritance

[Scott Brady Drummonds]

Hi, everyone,

I was stumped at an interview several months ago when questioned about the
use of the keyword "virtual" when inheriting a base class into a derived
class. I was told by the interviewer that this was useful in some cases of
multiple inheritance. Now I'm wondering what those cases are, and how they
occur, and exactly what this usage does to rectify the problem.

Can anyone help me understand this or recommend a resource that can?

Thanks,
Scott

 

[Artie Gold]

Hi, everyone,

I was stumped at an interview several months ago when questioned about the
use of the keyword "virtual" when inheriting a base class into a derived
class. I was told by the interviewer that this was useful in some cases of
multiple inheritance. Now I'm wondering what those cases are, and how they
occur, and exactly what this usage does to rectify the problem.

Can anyone help me understand this or recommend a resource that can?

See:

http://www.parashift.com/c++-faq-lite/multiple-inheritance.html#faq-25.8

[In fact, reading the whole `chapter' -- and for that matter the rest of
the FAQ -- would likely be fruitful.]

HTH,
--ag

 

[Scott Brady Drummonds]

See:

http://www.parashift.com/c++-faq-lite/multiple-inheritance.html#faq-25.8

Ugh... Many apologies for asking a FAQ question. I have the printed FAQ
(C++ FAQs...) and could not find this question there. I'll be sure and
check online next time, too.

Thanks for the pointer!

Scott

 

[Jumbo]

Hi, everyone,

I was stumped at an interview several months ago when questioned about the
use of the keyword "virtual" when inheriting a base class into a derived
class. I was told by the interviewer that this was useful in some cases of
multiple inheritance. Now I'm wondering what those cases are, and how they
occur, and exactly what this usage does to rectify the problem.

Can anyone help me understand this or recommend a resource that can?

See:

http://www.parashift.com/c++-faq-lite/multiple-inheritance.html#faq-25.8

[In fact, reading the whole `chapter' -- and for that matter the rest of
the FAQ -- would likely be fruitful.]

HTH,
--ag

You sure know how to kill a good conversation.

 

[E. Robert Tisdale]

Ugh... Many apologies for asking a FAQ question.
I have the printed FAQ (C++ FAQs...)
and could not find this question there.
I'll be sure and check online next time, too.

It doesn't hurt to ask.
I just wish more C++ Gurus would read the C++ FAQ
so that they could cite relevant questions (answers)
the way that Artie Gold did above.

Way to go Artie!