[cfe-dev] How to warn about std::move resulting in a copy

[Daniel Dilts]

I was listening to Scott Meyers's talk at Going Native 2013 and it was mentioned that a warning about a call to std::move resulting in a copy instead of a move would cause so many false positives that it would be useless.


Obviously it wouldn’t be useful to warn every time a return from std::move is copied, but maybe there is a subset that would be useful.  My thoughts on what set of circumstances might lead to a useful warning.


Value returned from std::move is copied


Value returned from std::move is movable


Value returned from std::move is const qualified



Is there other set of restrictions that might be needed to make this useful?
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