[swift-evolution] Feature proposal: Range operator with step

[Milos Rankovic]

> On 6 Apr 2016, at 21:08, Ted F.A. van Gaalen via swift-evolution <swift-evolution at swift.org> wrote:
> 
> v1 >  v2:   is allowed and correctly evaluated.  e.g. (8.0…-3.14159).by(-0.0001) 

If the range does not assume `start >= end`, is it still necessary to also indicate the traversal direction with the sign of the step (`-0.0001`)?

milos
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