There is an :inherit slot keyword option for indexed slots. It causes
subclasses of the defining class to share the index of the base
class. You can inhibit subclass sharing by re-defining the slot in
the base class. I found a bug in unstable and patched it so this
works again.
Calling map-inverted-index (and the top-level API fn's get-instances-
by-value/range) from the base or subclasses will return instances for
all classes that share that base index. We could add some refinements
such as mapping from a subclass filters out any superclass instances
during the traversal.
We can easily add a keyword arg to map-class and get-instances-by-
class to return all subclass instances as well.
Ian
On Sep 16, 2008, at 7:53 AM, Leslie P. Polzer wrote:
so do you people think that inheritance support on map level is a
right
thing?
Yes, definitely.
Got a code draft?
--
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Blog: http://blog.viridian-project.de/
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