What does it mean to "delegate to a sister class" via virtual inheritance?, C++ FAQ

C++ FAQ

From Marshall Cline: Bjarne Stroustrup, Herb Sutter, Andrei Alexandrescu, Pearson / Addison-Wesley Publishers and I collaborated to create a new C++ Super-FAQ! It's a team effort, with huge contributions from each of us and with amazing support from dozens of brilliant editors. The result is "awesomer" than ever! I originally wrote/published the FAQ in 1991 and now look forward to this new phase - and to continue working with it for another 20 years!

On a personal note, I'm at Oculus VR and it is amazing - fabulous people doing fabulous work. We're hiring more fabulous people so write me if that's you!

FAQ: What does it mean to "delegate to a sister class" via virtual inheritance? ←(in the new Super-FAQ)

It's in Section: Inheritance — multiple and virtual inheritance:

FAQ: How is this section organized?
FAQ: I've been told that I should never use multiple inheritance. Is that right?
FAQ: So there are times when multiple inheritance isn't bad?!??
FAQ: What are some disciplines for using multiple inheritance?
FAQ: Can you provide an example that demonstrates the above guidelines?
FAQ: Is there a simple way to visualize all these tradeoffs?
FAQ: Can you give another example to illustrate the above disciplines?
FAQ: What is the "dreaded diamond"?
FAQ: Where in a hierarchy should I use virtual inheritance?
FAQ: What does it mean to "delegate to a sister class" via virtual inheritance? (this FAQ)
FAQ: What special considerations do I need to know about when I use virtual inheritance?
FAQ: What special considerations do I need to know about when I inherit from a class that uses virtual inheritance?
FAQ: What special considerations do I need to know about when I use a class that uses virtual inheritance?
FAQ: One more time: what is the exact order of constructors in a multiple and/or virtual inheritance situation?
FAQ: What is the exact order of destructors in a multiple and/or virtual inheritance situation?