Re: CoreBase toll-free bridging

[Maxthon Chan]

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 <address@hidden> 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 <address@hidden> 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
>> 
>> 
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