[swift-evolution] Feature proposal: Range operator with step
xiaodi.wu at gmail.com
Mon Mar 28 17:08:13 CDT 2016
D'oh! Of course, that sounds great. Would it require you to do something
else to cover your example with UnsafePointers though?
On Mon, Mar 28, 2016 at 4:56 PM Dave Abrahams via swift-evolution <
swift-evolution at swift.org> wrote:
> on Mon Mar 28 2016, Erica Sadun <swift-evolution at swift.org> wrote:
> >> On Mar 28, 2016, at 3:25 PM, Dave Abrahams via swift-evolution
> >> <swift-evolution at swift.org> wrote:
> >> on Mon Mar 28 2016, Xiaodi Wu
> >> <swift-evolution at swift.org
> >> <mailto:swift-evolution at swift.org>>
> >> wrote:
> >>> Right, Countable could refine Strideable. I'm no expert on this, but
> >>> some cursory reading suggests that the analogous feature in C++ simply
> >>> requires the type to have operator++ defined. Obviously, that won't
> >>> work for Swift 3.0...
> >> Hmm, instead of defining a new protocol (Countable), what if we just use
> >> “Strideable where Stride : Integer” as a constraint?
> > I like a differentiation between continuous and discrete things
> > although both can have ranges, membership, fences,
> > and a way to stride through them
> Strideable where Stride : Integer expresses just exactly that. Now if I
> could only get the type-checker to cooperate...
> > -- E, just musing, not passing judgement on names
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