> On Feb 6, 2015, at 1:18 PM, Jonathan Mitchell <[email protected]> wrote: > >> On 6 Feb 2015, at 20:46, Jens Alfke <[email protected]> wrote: >> >> Come to think of it, I'm surprised that AppKit delegates are still >> unsafe-unretained. Why haven't these been converted to safe weak references >> yet? > > I presume that AppKIt (all of it?) is not compiled using ARC and hence > doesn’t get weak reference tracking et al?
The weak reference machinery is available to non-ARC code by calling the runtime functions directly. The system is fragile if you write it by hand, though, so we don't generally recommend it. > Why isn AppKit compiled using ARC? Probably because it has a track record as > it is and would likely gain nothing in a functional sense. The primary reason is that there is no way to compile a single library that uses ARC and also supports GC. AppKit needs to support GC so it can't use ARC. -- Greg Parker [email protected] Runtime Wrangler _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
