Returning std::vector by value

Posted by deft_code on Stack Overflow See other posts from Stack Overflow or by deft_code
Published on 2012-06-28T15:14:05Z Indexed on 2012/06/28 15:15 UTC
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c++

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c++11

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return-value

It is oft said that in C++11 it is sane to return std::vector by value.

In C++03 this was mostly true as RVO should optimize away the copy. But that should scared most developers away.

In C++11 will a returned std::vector local variable always be moved?
What if that vector is a member of a local variable instead of a local variable itself?
Obviously returning a global variable will not be moved. What other cases will it not be moved?

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