[llvm] r336805 - Recommit r334887: [SmallSet] Add SmallSetIterator.

[Florian Hahn via llvm-commits]

On 12/07/2018 19:32, Zachary Turner wrote:
> I was about to revert this too but Galina beat me.  The problem is that 
> in MSVC's STL, set<T>::const_iterator is not trivially copy constructible.
> 

Argh, this is unfortunate :( Thanks for reverting it for now, I'll have 
to see how to best resolve the windows issue