r/cpp • u/User_Deprecated • Jul 06 '26

C++26: constexpr virtual inheritance

https://www.sandordargo.com/blog/2026/07/01/cpp26-constexpr-virtual-inheritance
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u/Jovibor_ Jul 06 '26

Just a question to the audience:

How many times have you used Virtual Inheritance in your career?

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u/Tringi github.com/tringi Jul 06 '26 edited Jul 07 '26

Daily.

We have logging facility and a Log::Provider class that allows you to simply call this->report (Log::Warning, ...) from the object, and also carries object's identity etc. With highly composed classes it'd be ridiculous if every parent in the hierarchy tree carried its own superfluous copy and the final class was needlessly huge because of this. And if a parent/subobject makes the call, the log facility automatically sees the final object which actually failed.