[swift-evolution] Discussion: Move range (..., ..<) to a range() function

[Jordan Rose]

> On Dec 8, 2015, at 16:58, Brent Royal-Gordon <brent at architechies.com> wrote:
> 
>> Don't forget that most Ranges are on collection indexes, not strideable types, and Int is used as a collection index.
> 
> In this design, I think Range<Index> is replaced by Interval: IntervalType where Interval.Bound == Index.

Not all Index types are Comparable (just like not all Comparable or Strideable types are ForwardIndex types).

Jordan