On Fri, Oct 14, 2016 at 2:31 AM, Jonathan Wakely wrote:
> Yes, that's right. OK for trunk, thanks.


> By the way, I'm intending to add __throw_bad_variant_access_fmt to
> bits/functexcept.h and make it use __snprintf_lite() so that we can
> do:
>       __throw_bad_variant_access_fmt("cannot access alternative %zu "
>           "of std::variant because index() is %zu", _Np, __v.index());
> (Thanks to Nico Josuttis for the suggestion).

It's great to be able to print runtime indices in an exception
message! I could have used this for std::regex exceptions too.

Tim Shen

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