On Monday 22 April 2013 12:45:58 Fernando Cacciola wrote:
On 22-Apr-13 12:09 PM, Mathias Gaunard wrote:
On 22/04/2013 15:05, Fernando Cacciola wrote:
On 22-Apr-13 9:37 AM, Nathan Crookston wrote:
Fernando Cacciola wrote:
Hi People,
I'm pleased to announce that thanks to the outstanding effort of Andrzej Krzemienski who wrote the standard papers, and Ville Voutilainen who champion it during the meetings, we now have std::optional<T> in C++14!
Great news! I'm almost scared to ask, but what did the committee decide concerning optional<T&>?
LOL, I knew people would ask. Well, they decided to drop it from C++14.
That's not what I remember.
I thought that what was said is that optional<T&> didn't need to be specialized,
That's technically correct.
So I should have said that our proposed specialization for T& was dropped.
First, congratulations! I'm happy to see this component is making its way into the standard. Second, if I understand correctly, without specializing optional for references, optional<T&> will be suboptimal (i.e. it will essentially be a pointer and a bool instead of just a pointer). Why not requiring this optimization?