[Pyobjc-dev] objc classes

[Helge H. <hel...@op...>]

Hi there,

just found that in class-builder.h:
---snip---
  *    Note that it is not possible to remove classes from the 
Objective-C
  *    runtime (at least with the Apple runtime, not sure about the GNU 
runtime).
---snap---

I would love to understand what exactly is meant here and how it 
restricts functionality. Does that only mean that the class structure 
may not be deallocated and cannot be unlinked?

Is it possible to change the mapping of a class name in the name 
registry (name to structure) mapping? So that the old class object is 
still available, but the new class object will be used for new 
instances?

Further, would it possible to change the class hierarchy of an existing 
class? So that MyFormatter initially inherits from say NSFormatter and 
after reloading a Python module inherits from NSDateFormatter. Would 
that be possible with the Apple ObjC runtime or is this already 
possible with PyObjC?

Thanks a lot,
   Helge
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