How to return && object from function?

Question

I have TTempTable class with move symantics. I wrote

TTempTable&& MyFunction() {
   TTempTable tmp = f(...);
   ...
   return std::move(tmp);
}

and got no compiler errors.

Was this correct?

Have a look at [this rule in the C++ Core Guidelines](http://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#f45-dont-return-a-t) — GPhilo, May 27 '19 at 12:56

score 20 · Accepted Answer · answered May 27 '19 at 12:56

20

No, it is not correct.

Like any dangling thing, the compiler won't [always] diagnose it for you.

Return by value, and remove the std::move (it's redundant and inhibits elision).

answered May 27 '19 at 12:56

1 Answers1