> On Feb 25, 2017, at 07:06, Ben Rimmington via swift-evolution > <swift-evolution@swift.org> wrote: > > <https://github.com/apple/swift-evolution/blob/master/proposals/0104-improved-integers.md> > >> On 24 Feb 2017, at 02:05, Ben Cohen wrote: >> >> Regarding the “Number” protocol: it was felt this is likely to cause >> confusion with NSNumber, given the NS-prefix-dropping versions of other >> Foundation types indicate a value-typed concrete type equivalent, which this >> won’t be. The recommendation is to use “Numeric" instead. > > Does the `Error` protocol cause confusion with the `NSError` class? > > I think `Number` is better than `Numeric`, because it is consistent with > `SignedNumber`.
Error and NSError are actually related types, like String and NSString, and are used in roughly the same way. Numeric and NSNumber serve very different purposes: the former is a protocol for various operations, and the latter is a semi-type-erased class box around a *cough* numeric value that (deliberately) doesn't implement most of the operations in the protocol. Jordan _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
