[bug #41325] KVO: +[NSObject keyPathsForValuesAffecting<Key>] not supported

[Fred Kiefer]

Update of bug #41325 (project gnustep):

                  Status:                    None => In Progress            

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Follow-up Comment #1:

I just implemented the method keyPathsForValuesAffectingValueForKey, but the
result may not be as expected.

The current implementation of KVO in GNustep does not call this method when a
key gets observed to determine which which key paths affect which others. I
think fixing this would require an almost complete rewrite of the KVO
implementation.

What we could do to get a similar result would be to add calls to the
keyPathsForValuesAffectingXXX: methods when a new observer gets added and fix
the values in dependentKeyTable to reflect those connections.

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  <http://savannah.gnu.org/bugs/?41325>

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