[libstdc++ PATCH] Implement __is_nothrow_swappable and use it

[Ville Voutilainen]

On 1 May 2015 at 12:47, Ville Voutilainen <ville.voutilainen@gmail.com> wrote:
> This patch partially solves the problem described in N4426, which is
> basically LWG
> issue 2456, which in turn is caused by CWG DR 1330. Some remarks:

..and I forgot to mention that it fixes PR 63860.