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Slightly improved F.20 to highlight the note about const return values

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Herb Sutter 2021-01-28 11:36:40 -08:00
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# <a name="main"></a>C++ Core Guidelines
August 3, 2020
January 28, 2021
Editors:
@ -3064,6 +3064,8 @@ If you have multiple values to return, [use a tuple](#Rf-out-multi) or similar m
A `struct` of many (individually cheap-to-move) elements might be in aggregate expensive to move.
##### Note
It is not recommended to return a `const` value.
Such older advice is now obsolete; it does not add value, and it interferes with move semantics.