[boost] none_t in the boost namespace

From: Fernando Cacciola (fernando_cacciola_at_[hidden])
Date: 2005-02-24 10:57:51

Hi people,

In the users mailing list, Yuval Ronen pointed out that optional<> uses a 
type "detail::none_t", documented as such, thus prompting people to use a 
type in a namesapece which is supposed to be hidden to end users.
A straightforward fix is to just move "none_t" out of the detail namespace 
directlty into boost.
However, this little change introduces a new type in the (main) boost 
namespace, so before I do that I want to make sure it won't have any 
undesired impact.

If you see any reason for not doing this (putting "none_t" right there in 
boost) please speak now.

If no one objects, I'll do it.

Best,

Fernando Cacciola