[cfe-dev] Automatic Reference Counting for Objective-C

[Chris Lattner]

On Jun 30, 2011, at 1:04 AM, Jean-Daniel Dupas wrote:
>> The migration tool isn't expected to be generally useful outside of Xcode, and the interfaces continue to change and evolve over time.  ARR was an earlier name for the feature before we standardized on ARC.  Expect change in the migrator, don't get too comfortable with it :)
> 
> Not only the migrator uses it. The __has_feature tag use to detect if arc is enabled used arr too (it is objc_arr).

Yes, but it will be removed.  Please use __has_feature(objc_arc) instead.

-Chris