Herb Sutter's CppCon talk "Extending and Simplifying C++: Thoughts on Pattern Matching using `is` and `as`"

[Andrei Alexandrescu]

I think it's relevant to our recent discussion on versioning, and also 
for its considerations on language design.

https://youtube.com/watch?v=raB_289NxBk

P.S. Destruction comes at https://youtu.be/raB_289NxBk?t=4727 :o)