On Fri, Aug 19, 2016, at 06:08 PM, Charles Srstka wrote: > > On Aug 19, 2016, at 3:46 PM, Quincey Morris > > <quinceymor...@rivergatesoftware.com> wrote: > > > > On Aug 19, 2016, at 10:53 , Charles Srstka <cocoa...@charlessoft.com > > <mailto:cocoa...@charlessoft.com>> wrote: > >> > >> [NSArray array] is a synonym for [[[NSArray alloc] init] autorelease]. > > > > (along with other similar comments in other responses) > > > > To be pedantic, it’s *implemented* as [[[NSArray alloc] init] autorelease], > > but the lack of an API contract to that effect means that “synonym” isn’t > > quite accurate. > > > > My point is that Apple might revisit the implementation of NSArray at any > > time (in these Swiftian days, stranger things have happened), and choose to > > write it with full ARC compatibility, which means there might not be any > > autorelease when invoked from ARC client code, since ARC can optimize the > > code when it handles both ends of the invocation. > > Swift typically just calls the initializer if it’s there, so the > convenience initializers like +[NSArray array] are really only relevant > to Objective-C code. For that reason, I doubt they’d change unless Apple > did something crazy like rewrite the entire frameworks in Swift, in which > case they’d probably go away.
There is an official reimplementation of Foundation/CoreFoundation in Swift. The implementation of NSObject lacks a `static func new`: <https://github.com/apple/swift-corelibs-foundation/blob/master/Foundation/NSObject.swift> Likewise, Swift explicitly does not bridge `+new` from ObjC, so this is a moot point in Swift code. > So for the foreseeable future, the > difference is that +array returns an autoreleased object, meaning that in > ARC code, +new is the better choice. I would not make that assumption. Who says +[NSArray array] constructs anything at all? Try comparing the return values of two calls to [NSArray array] sometime. ;-) I happen think +new is more readable, but it’s really just a matter of preference. --Kyle Sluder _______________________________________________ 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
