Another simple reversing of OS X Foundation and CoreFoundation

[Maxthon Chan]

$for fmwk in Foundation CoreFoundation; do class-dump 
/System/Library/Framework/$fmwk.framework -H -o ~/Developer/$fmwk; done

And I got a set of class dump of Foundation and CoreFoundation of OS X. And 
examining the files I think I found something:

* A significant portion of what OS X called Foundation is in fact implemented 
in CoreFoundation. (that is, Foundation itself, not just public abstract class 
of class clusters and CoreFoundation mirroring classes)
* Foundation re-export the symbols by applying huge amounts of categories on 
the abstract public class, redeclaring the interfaces.
* Apple moved the headers from CoreFoundation to Foundation when distributing, 
but in reality the code is located in CoreFoundation.
* What remained in Foundation is the classes that is not bridged.
* All CoreFoundation objects are actually Objective-C objects, at least there 
are stub classes that inherit from NSCFType or their bridged public abstract 
class.

This analyse is based on OS X 10.8 SDK from Xcode 4.6, and OS X 10.9 DP1 
binaries.