[PATCH] DR 522 (Ready) - tuple<>::swap

[Paolo Carlini]

Hi,
> Implements DR 522 - tuple<>::swap. Am I using swap ADL correctly here?
>   
I think you are. In fact, if I remember correctly, that particular idiom
is also suggested explicitly in Scott Meyers' Effective C++, it would be
nice if somebody could double check that...

Therefore, barring comments during the next 1-2 days, please go ahead
with the patch, and many thanks again!

Paolo.

PS: I would suggest marking patches for the library with [v3] or
something similar, it helps when the mailing list is followed via email
only...