Sorry if this has been suggested before, but what is wrong with something along
let x: Int[4] let x: Int<4> In case of multi-dimension arrays: let x: Int[4][4] let x: Int[4, 4] let x: Int<4><4> let x: Int<4, 4> I see small issues with each that would need to be discussed - the first would disallow subscripts on types. Subscripts currently cannot be static, at least now anyway, though. The second syntax is too close to generics, which may be confusing... > On May 29, 2017, at 11:39 PM, Nicolas Fezans via swift-evolution > <swift-evolution@swift.org> wrote: > > > On Mon 29. May 2017 at 20:57, David Sweeris via swift-evolution > <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: > > > On May 29, 2017, at 01:12, Tino Heth via swift-evolution > > <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: > > > > I agree strongly that the syntax looks awkward — imho > > var v: Vector<Int, size: 3> > > would be a much better fit than > > var v array 3 of Int > > > > As much as I want to have "real" arrays, I don't think we should add new > > keywords for them. > > Yeah, a "fixed-size array" is probably the most obvious use-case for allowing > literal values to be generic parameters. In fact, at that point, they'd just > be another type... no special support needed, other than validating the count > when assigning array literals to them. > > > The syntax that gained some traction last time they were seriously discussed > would also be better, IMHO: > let x: [Int x 4] > or maybe it was this? > let x: [Int * 4] > Either way, it's more concise, far easier to read (IMHO), and doesn't need > new keyword(s). > > I have not followed all previous discussions on this (so sorry if it was > already proposed and/or discussed) but from the point of view of the > "standard mathematics writing", it seems to me that it should rather be > [Int^4] . > > Indeed the three dimensional space built by combining the set of real numbers > R is noted R^3 or alternatively RxRxR (but for larger dimensions you > certainly do not want this writing!) > > Strictly speaking Int^4 would be mathematically speaking more correct but > [Int^4] has the advantage of making clear that this is indeed an array. > > There are many aspects in the initial proposal that certainly need a more > expert eye than mine. I have one question though. It seems to me that the > constant expressions as known as constexpr in C++11 would be allowed as well. > Is that right? If yes, are there any differences in the proposal to what is > allowed in C++11? > > Nicolas > > > > - Dave Sweeris > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org <mailto:swift-evolution@swift.org> > https://lists.swift.org/mailman/listinfo/swift-evolution > <https://lists.swift.org/mailman/listinfo/swift-evolution> > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution
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