D'oh! Of course, that sounds great. Would it require you to do something else to cover your example with UnsafePointers though?<br><div class="gmail_quote"><div dir="ltr">On Mon, Mar 28, 2016 at 4:56 PM Dave Abrahams via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
on Mon Mar 28 2016, Erica Sadun <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>> wrote:<br>
<br>
>> On Mar 28, 2016, at 3:25 PM, Dave Abrahams via swift-evolution<br>
>> <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>> wrote:<br>
>><br>
>><br>
>> on Mon Mar 28 2016, Xiaodi Wu<br>
><br>
>> <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a><br>
>> <mailto:<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>>><br>
>> wrote:<br>
>><br>
>>> Right, Countable could refine Strideable. I'm no expert on this, but<br>
>>> some cursory reading suggests that the analogous feature in C++ simply<br>
>>> requires the type to have operator++ defined. Obviously, that won't<br>
>>> work for Swift 3.0...<br>
>><br>
>> Hmm, instead of defining a new protocol (Countable), what if we just use<br>
>> “Strideable where Stride : Integer” as a constraint?<br>
><br>
> I like a differentiation between continuous and discrete things<br>
> although both can have ranges, membership, fences,<br>
> and a way to stride through them<br>
<br>
Strideable where Stride : Integer expresses just exactly that. Now if I<br>
could only get the type-checker to cooperate...<br>
<br>
><br>
><br>
> -- E, just musing, not passing judgement on names<br>
><br>
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<br>
--<br>
Dave<br>
<br>
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</blockquote></div>