this post was submitted on 25 Nov 2023
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On harmful overuse of std::move - The Old New Thing (devblogs.microsoft.com)
submitted 1 year ago by lysdexic to c/cpp
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[–] lysdexic 1 points 1 year ago (1 children)

RVO

I recommend you read the thread.

[–] [email protected] 1 points 1 year ago (1 children)

@lysdexic I did.

[–] lysdexic 1 points 1 year ago (1 children)

It doesn't look like it, otherwise you'd be aware that the whole point of this submission is that casting return values with std::move disables RVO.

[–] [email protected] 1 points 1 year ago (1 children)

@lysdexic You claimed otherwise:
"
These std::move invocations are harmless, as they only cast objects to their rvalue reference.
"
If you were right, we wouldn't have the motivation to look at this in EWG.

[–] lysdexic 1 points 1 year ago

If you were right, we wouldn’t have the motivation to look at this in EWG.

I am right. Not benefiting from RVO does not mean you're harming anyone.

Again, I recommend you read the submission and also the discussion.