[PATCH] Add new ubegin/uend API to StringRef/MDString

[Duncan P. N. Exon Smith]

> On 2014 Nov 12, at 17:23, Keno Fischer <kfischer at college.harvard.edu> wrote:
> 
> This was suggested in http://reviews.llvm.org/D6184.

@David: I don't think the emails are showing up in Phabricator, but it's
in the archives [1].

[1]: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20141103/243658.html