[elephant-devel] Class Heirarchies and Queries

[Ian Eslick]

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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