Can we make a GSPointerWrapper class or like to wrap non-objects into objects so that they can be safely placed into the existing NSArray/NSDictionary objects in order to implement CF objects in Objective-C? And as I said, CoreFoundation is designed to support both Foundation and Carbon on OS X, thus running in a lower layer. We don't have that Carbon issue, thus we really can safely implement CoreBase on the layer higher than Base and use something like GSPointerWrapper to emulate its low-level behaviors.
在 2013-3-11，上午7:04，Stefan Bidi <stefanb...@gmail.com> 写道： > The option to implement CoreBase on top of Base was done in the > beginning. The problem here is that CF works in a much lower level > than Cocoa and as such a lot of functionality simply cannot be > implemented this way. For example, collection classes like CFArray > and CFDictionary allow for non-objects to be added as keys and values, > this isn't allowed for NSArray and Dictionary. > > That's just one example. That was the original direction and I had to > eventually move to re-implementing everything in order to have full > compatibility. I do borrow a lot of code from Base, though. > > On Sun, Mar 10, 2013 at 5:20 PM, Luboš Doležel <lu...@dolezel.info> wrote: >> On 03/10/2013 11:04 PM, Chan Maxthon wrote: >>> >>> How about reversing the relationship on GNUstep: implement CoreBase >>> in Objective-C. Everything except CFRetain() and CFRelease() can be >>> built with ARC, and CF objects are typedef'd to their respective >>> Objective-C counterpart. Apple invented CF to serve Carbon and Cocoa >>> simultaneously, but we don't have that Carbon trouble so we can >>> really bravely implement CF using Obj-C. >> >> >> Umm, I suppose it might be doable (without giving it much thought), though a >> lot of Stefan's work on corebase would get thrown away. >> >> I haven't been around when gnustep-corebase was launched, so I can't tell >> whether this option has been considered...? >> >> -- >> Luboš Doležel >> >> >> _______________________________________________ >> Gnustep-dev mailing list >> Gnustep-dev@gnu.org >> https://lists.gnu.org/mailman/listinfo/gnustep-dev _______________________________________________ Gnustep-dev mailing list Gnustep-dev@gnu.org https://lists.gnu.org/mailman/listinfo/gnustep-dev
