[v3 PATCH] Implement P0504R0 (Revisiting in-place tag types for any/optional/variant).

[Ville Voutilainen]

On 14 November 2016 at 22:49, Ville Voutilainen
<ville.voutilainen@gmail.com> wrote:
> I needed to do some minor tweaks in
> testsuite/20_util/in_place/requirements.cc. I committed the attached
> after testing the full suite on Linux-PPC64.


P.S. make_unsigned/make_signed tests seem broken. That's not caused by
any of my patches. The expected
diagnostic message seems to have changed. I can probably fix that, but
I will do the hash-poisoning patch first.