> On Jul 31, 2017, at 10:38 PM, David Sweeris <daveswee...@mac.com> wrote: > >> On Jul 31, 2017, at 7:23 PM, Daryle Walker via swift-evolution >> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: >> >> The tuple will be a bunch of “T,” but the count mechanically added depends >> on compiler-visible number N. Well, since this is part of a proposal that >> already mutates the language, I thought why not add a primitive operation by >> fiat: >> >> func tuple<T, N: Int>(from: [N; T]) -> ( #dup(N; T) ) >> >> where “#dup” dumps a comma-separated list repeating the right-side entity >> with a multiplicity of the left-side value. The left-side value has to be a >> compiler constant expression. I was going to have the right side be an >> arbitrary token sequence, but I think it’s better for now to limit it to >> either a type (or similar) or an expression. Obviously, the receiver has to >> compatible with whatever being dumped there. > > We've been talking about adding Variadic Generic Parameters for a while, and > I'm pretty sure that the functionality you're suggesting here would be a > subset of that. We're just waiting for it to come into scope.
I don’t think this functionality is covered by variadic generic parameters. — Daryle Walker Mac, Internet, and Video Game Junkie darylew AT mac DOT com
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