On 2011 Feb 02, at 12:51, Quincey Morris wrote:

> I don't believe there's any real difficulty about writing the accessors as 
> such.

Agreed; I've added such "value accessors" with no trouble.

> If you make *only* a getter for the "...Num" version, then I think it's easy 
> -- you just make it a dependent key via 'keyPathsForValuesAffecting...'.

But I'd say you need to do it the other way around, since the Num/object 
version is the "primitive" which is stored in the data model by Core Data.  The 
scalar accessor should depend on the Num/object accessor.

> If you try to make a setter too, then it gets harder to make sure you don't 
> generate too many KVO notifications

Similarly, the scalar setter should invoke the "primitive" Num/object accessor.

On 2011 Feb 02, at 12:16, Sean McBride wrote:

> Use mogenerator.  It creates scalar accessors for you…

Yes, I've used mogenerator for new projects, but, you know, for little changes 
I just write the code by hand … faster to grab a pair of pliers from the 
kitchen drawer rather than going out to the garage to get a socket wrench.  But 
Gordon, you should try mogenerator and see if the code it generates is as I 
described above.

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