some questions relate to selector and NSView

[Banlu Kemiyatorn]

I have some questions,
1) why can't there be sel_getUid() as an alias to sel_get_uid()?

2) if I send a non existing selector to anObject, eg [anObject hoho];
(or may be [anObject performSelector:sel_get_uid("hoho")];)
gstep will crash even I implement doesNotRecognizeSelector:
right after I choose to ignore from

"Critical Error in MyApp"
NSInternalInconsistencyException:GSFFCallInvocation.m:777
Assertion failed in GSInvocationCallback. No signature for selector hoho.

Why is that? It shouldn't crash, should it?

By implementing a blank method in any non-related object solve the crash
problem but that isn't dynamic. Instead, I can use respondsToSelector: to
prevent the problem before I send it to the reciever but that isn't as 
comfortable
using doesNotRecognizeSelector or forwardInvocation:

3) Why NSView doesn't do mouseUp? But I guess this is a bug
since it didn't match the behavior of NSView according to oreilly's
learning cocoa book. (It is strange that sometimes it work)