on Tue May 30 2017, Michael Ilseman <milseman-AT-apple.com> wrote: >> On May 27, 2017, at 10:40 AM, Dave Abrahams via swift-evolution >> <swift-evolution@swift.org> wrote: >> >> >> An index that does not fall on an exact boundary in a given `String` >> or `Substring` view will be “rounded down” to the nearest boundary >> when used for slicing or range replacement. So, for example, >> > > What about normal subscript? I.e. what would the following print? > > print(s[s.unicodeScalars.indices.dropFirst().first!]) // “é”, or just > the combining scalar?
I am proposing that it would be “é” > > > Would unifying under the same type require that indices be less > stateful than they currently are? No; it's just a matter of unifying the states (in an enum). You can look at the implementation in https://github.com/apple/swift/pull/9806 for details. > >> ```swift >> let s = "e\u{301}galite\u{301}" // "égalité" >> print(s[s.unicodeScalars.indices.dropFirst().first!...]) // “égalité" >> print(s[..<s.unicodeScalars.indices.last!]) // "égalit" >> ``` -- -Dave _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
