+1. Would think that all variants should exist on Optional too unless it would be harmful. On Wed, Jun 7, 2017 at 20:13 Michael J LeHew Jr via swift-evolution < [email protected]> wrote:
> This is a great idea, and ought to be easy enough to bring forward! +1 > from me! > > -Michael > > > On Jun 7, 2017, at 11:18 AM, Matt Diephouse via swift-evolution < > [email protected]> wrote: > > > > 💯 > > > >> On Jun 7, 2017, at 10:35 AM, Adam Sharp via swift-evolution < > [email protected]> wrote: > >> > >> The new smart key path feature is really lovely, and feels like a great > addition to Swift. > >> > >> It seems like it might be straightforward to add overloads of `map` and > `flatMap` to the standard library to make use of the new functionality: > >> > >> let managers = flatOrganisation.managers > >> let allEmployees = Set(managers.flatMap(\.directReports)) > >> let employeeNames = Set(allEmployees.map(\.name)) > >> > >> This feels like a really natural way of working with key paths in a > functional style. It makes a lot of sense for collections, and possibly for > Optional too (although as far as I can see optional chaining is more or > less equivalent, and with more compact syntax). > >> > >> I’m hoping that this might be low-hanging fruit that could be > considered for the Swift 4 release. I’d be happy to have a go at writing a > proposal if there’s interest! > >> > >> –Adam > >> > >> _______________________________________________ > >> swift-evolution mailing list > >> [email protected] > >> https://lists.swift.org/mailman/listinfo/swift-evolution > > > > _______________________________________________ > > swift-evolution mailing list > > [email protected] > > https://lists.swift.org/mailman/listinfo/swift-evolution > > _______________________________________________ > swift-evolution mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-evolution >
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