Size already defined

Question

I was messing with my Objective-C++ namespace today.

I found that Handle, Size and Duration are already defined in ObjC++. What are they defined to be and where are they defined?

I have only #imported Foundation/Foundation.h

Answer 1

MacTypes.h

typedef char *                          Ptr;
typedef Ptr *                           Handle;
typedef long                            Size;
typedef SInt32                          Duration;

These all predate Carbon. They having nothing to do with Cocoa even though they fill up the namespace.