workable program (including the main function) using virtual inheritance in cereal

[XuClever]

Hello!

Working with virtual inheritance in cereal is very hard. Would anyone share a small workable program (including the main function) using virtual inheritance in cereal? 

I have read this document, but this document does not contain main function.

https://uscilab.github.io/cereal/inheritance.html

Thank you very much for your help.

Sincerely

XuClever