> On Dec 22, 2017, at 2:18 PM, Quincey Morris > <quinceymor...@rivergatesoftware.com> wrote: > > On Dec 22, 2017, at 08:48 , Daryle Walker <dary...@mac.com > <mailto:dary...@mac.com>> wrote: >> >> DispatchData would need to be convertible to Data. Is there a way to do the >> conversion in Swift? > > Actually, on consideration, I think not. It would be if DispatchData was > bridgeable like Data, but it isn’t, and I don’t see any way of extracting its > underlying reference. This leaves you with two options that I can see: > > 1. Use an Obj-C helper function, taking an array of input buffers, and > returning a dispatch_data_t object that combines them, cast to a NSData*. You > can then use the returned reference as Data. > > 2. Move your Data extension to DispatchData. That’s what I was asking about > earlier — is there any reason why you couldn’t just use DispatchData rather > than Data, in all the code that deals with this data set? In that case, you > can just build the DispatchData in Swift. > > IAC, you should probably submit a bug report. Since dispatch_data_t is > documented to be a subclass of NSData, there should probably be a mechanism > for getting Data and DispatchData values as equivalents of each other, > without any unprovoked copying of the underlying data.
This code is not for private use within an app, but for something I plan to publicize as a library on GitHub. So the interface has to stay as using Data. (Fortunately, this part of the interface, an extension to Data, is private.) DispatchData and Data don’t even have a custom shared interface (just the general RandomAccessCollection) I could use here to not repeat myself in implementation. The library doesn’t need DispatchData, just my test case (and only as posing as a Data instance). It doesn’t seem I can do it without heroic measures by making a mixed Swift/Objective-C test project. And even if that is possible, I don’t even know if the Swift Package Manager supports it. So I have to let my meticulous side get bothered by the red-0-calls under Code Coverage mocking me until this is fixed somehow. Bug #36204480 (“DispatchData IS-NOT-A Data in Swift”). — Daryle Walker Mac, Internet, and Video Game Junkie darylew AT mac DOT com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
