> Furthermore, N4277 (TriviallyCopyable reference_wrapper) has a
> question-mark next to "none". I see no reason for a macro for this
> feature, as it is intended to be detected via the corresponding
> trait.
> Incidentally, I was the author of such paper.

The question mark is there only because no one had yet spoken up to agree
that there should be no macro.

If you, as the author of the proposal, think there should be no macro, I'm
more than willing to delete the question mark. :-)

Clark