Well I guess at http://www.opensource.apple.com/source/objc4/ but where exactly? objc4 doesn't sound much like Objective-C 2.0.
+2
A:
If you read the source code in that directory, it sounds a lot like Objective-C 2.0. Based on the included release notes, it appears to be the version from 10.5.
Chuck
2009-12-02 19:25:13
A:
That "4" refers to the build train of the compiler, not the version of the language.
NSResponder
2009-12-03 05:58:31