On Mar 21, 2013, at 11:39 AM, Seth Willits wrote:

>>> The reason it's limited to 19 bits is because for speed purposes
>>> NSParagraphStyle implements its own inline retain count rather than
>>> relying on NSObject's external refcount table. Which is also why you
>>> can't make ARC weak references to NSParagraphStyle instances. ;-)
>> 
>> Yikes. Usually the inline bits are used for the *low order* bits of the 
>> retain count. That is, the full retain count is something like 
>> (internal_refs + (external_refs << internal_width).
> 
> Ahh. 19 seems like such an arbitrary number, but if it's _supposed_ to be 
> extended then that'd make more sense. 
> 
> I'll be filing a radar today. 

#13478399

If any employees are watching.


--
Seth Willits

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