> On Aug 1, 2017, at 5:49 PM, David Sweeris via swift-evolution > <swift-evolution@swift.org> wrote: >> On Aug 1, 2017, at 10:54 AM, Daryle Walker via swift-evolution >> <swift-evolution@swift.org> wrote: >> >> A tuple can have its members initialized in piecemeal and still satisfy >> deterministic initialization. The named types need to do all their >> sub-objects' initializations before any designated initializer ends. I want >> the former for array instances, not the latter. It’s important for numeric >> applications, so math arrays don’t have to be set twice, once for an >> arbitrary default and again for the real data. > > Eh? What do you mean by "initialized in piecemeal"? These both give errors: > let x:(Int, Int) = (0) // something about not being able to convert `Int` to > `(Int, Int)` > let x:(Int, Int) = (0, _) // something about "_" only being allowed in > patterns > > Is that what you're talking about?
I think he means that you can do var x: (Int,Int) x.0 = 0 x.1 = 1 This is generally not allowed for other aggregates outside of initializers. John. _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
