[swift-evolution] Proposal: Contiguous Variables (A.K.A. Fixed Sized Array Type)

[Trent Nadeau]

Is having fixed arrays with large numbers of elements (256, 1024, etc.)
going to cause issues with protocol conformance of tuples? I believe that
since the type system doesn't currently have type-level integers, tuple
protocol conformance is done via a hard-coded limit.

On Fri, Jan 29, 2016 at 1:30 PM, Austin Zheng via swift-evolution <
swift-evolution at swift.org> wrote:

> That makes sense, thanks. I'm wondering if the N x T syntax might
> 'naturally fall out' of such a system for any other use cases.
>
> Daydreaming aside, I think this is a great proposal and it'll make
> 256-member C array tuples less awful to work with.
>
> Austin
>
> > On Jan 29, 2016, at 10:29 AM, Joe Groff <jgroff at apple.com> wrote:
> >
> >
> >> On Jan 29, 2016, at 10:22 AM, Austin Zheng via swift-evolution <
> swift-evolution at swift.org> wrote:
> >>
> >> I like the (Count x Type) design, but if Swift got integer generic
> parameters in the future is this what tuple shorthand syntax would still
> look like (not rhetorical, actually asking)? It would be nice to
> future-proof whatever design we come up with, to a reasonable extent.
> >
> > You'd still need something to define FixedArray<N> in terms of:
> >
> > struct FixedArray<T,N: Int> { var values: (N x T) }
> >
> > -Joe
>
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-- 
Trent Nadeau
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