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

[Milos Rankovic]

> On 6 Apr 2016, at 19:16, Dave Abrahams via swift-evolution <swift-evolution at swift.org> wrote:
> 
> We prefer methods to free functions.

However, `(from:to:by)` need not be a free function, it could be a sequence initialiser:

    Walk(from: 200, to: 0, by: 2)

or:

    Steps(from: 200, to: 0, by: 2)

or something along those lines...

milos
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