johnezang/JSONKit — pull request #141 by jrmiddle (2013-10-21 01:49:06+00:00)
Title: Move away from obj->isa, and wrap the workAroundMacOSXABIBreakingBug...

...check with a diagnostic ignore (bitmasking tagged pointers is deprecated).

There's likely more work to do around the ABIBreakingBug check; primarily wanted to get this up and running on iOS/Xcode5.0.1. Tested on iOS7.