> On Oct 14, 2016, at 11:15 AM, Ryan Lovelett via swift-users > <swift-users@swift.org> wrote: > > I'm puzzeled by the behavior of the automatic coercion. Specifically > when something will work and when it will not. It at least has something > to do with the platform. That much I have tracked down. > > I've attached a file, bridge.swift, that on Linux will fail to compile > with the error: cannot convert value of type 'NSData' to type 'Data' in > coercion. However, on Darwin it compiles just fine. > > (The contents of the file just incase it gets stripped) > > import Foundation > > let md = NSData(bytes: [0x0D, 0x0A, 0x0D, 0x0A], length: 4) > _ = md as Data > > On Linux the `md` has a method `_bridgeToSwift()` that returns the > `Data` I am looking for. But of course, the Darwin version does not. > > Which begs the question what is the cross-platform way of doing things? > I'm hoping it is not `if #os(Linux)`... > <bridge.swift>_______________________________________________
The `as` bridging is generally an Objective-C bridging feature, and isn't present on Linux. On Linux, AIUI, you should use the value types as much as possible—this was a major motivation for the "id-as-Any" changes to the ObjC bridge on Apple platforms to enable that. Does Data have a regular initializer to construct from an NSData? -Joe _______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
