Back to Basics: Move Semantics - Nicolai Josuttis - CppCon 2021

good one, got the basics thanks

"some" views not supporting iteration while const is a very nasty behaviour. More so since it is non-deterministic (at least at glance). Couldn't it be solved with mutable keyword? Recommending using auto&& so stuff works doesn't seem like the best idea as it is the first step to sacrifice const correctness.. :(

Otherwise - great talk! The more I delve into the move semantics the more they seem unfinished. The "valid but unspecified state" effectively means that unless your compiler supports use-after-move detection then you shouldn't ever move a named variable or else you risk shooting yourself in the foot. If that detection was default, then the compiler would move a lot of stuff automatically. This way, you're forced to optimize by hand a risk a bug.

Thank you for this talk.

Brilliantly explained. Thank you Mr Josuttis.

best explanation on move semantics

This is a perfect explanation what the move semantics is.

the best move semantics out there.

Thank you so much for deeply understanding of the move semantic and universal forwarding.

Great Talk!!!!!

great talk as always

Excellent talk

Thank you so much for these amazing videos. I've borrowed Nicolai's book "The c++ Standard Library", You are so inspirational and give great examples, thank you Nicolai.

how to get slide？

just amazing

Excellent, clear talk and the best on the subject. thank you!

Great example! Thanks to this video, now I have better understanding on move semantics.

The best talk ever on this topic.

Thank you for making these videos, Mr Josuttis.

Dear @CppCon, I would love to get the slide deck of this talk. Is sharing it a possibility?

Thank you for explaining why std::forward exists, it makes it easy to understand what it does and when you have to use it.

very nicely explained, thanks.

Well explained! Thx a lot!

Thank you for the nice talk! "Back to Basics" to the bone.
Why do destructors in derived classes destroy move semantics?

I wore the spine out of his 1st edition of "The C++ Standard Library". Thanks so much for that book, it very much helped me learn how to use the C++ standard library!

🖖

Really informative

Quite a complete summary that exposes most if not all the move semantic intricacies.

The last part about universal reference was very useful.

Thank you for the talk! I am learning C++ as a novice and really enjoying these sessions!
Very clear, with specific examples to explain the context and the value of the concept. 5/5!

Thank you Nicolai for such informative and detailed explanation of move semantics.
It would be interesting to read your ne books as well. ;)

Question:
It's not so nice having this T&& or auto&& for a universal reference since the type is vague.
Would it be possible to confine the type with concepts / requires T is MyClass somehow?

Also is there any plan to 'fix' forwarding in C++23?

Very clear, concise and meticulous talk, much appreciated.

Brilliant explanation.

A thoroughly excellent talk, this is by far the clearest and least confused explanation of C++ move semantics I have encountered. Bravo!