[Patch] Implementation of n3793 <experimental/optional>

[Jonathan Wakely]

Doh, that had yesterday's date on the ChangeLog entry, I've just fixed
it with the next commit.

On 1 November 2013 20:09, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
> Here's the final version of Luc's optional implementation that I'm
> committing, tested on x86_64-linux.
>
> (It occurs to me that we might want to move the contents of
> include/tr2 to include/experimental and namespace experimental, since
> there isn't going to be a "TR2" now.)