🚀 go-pugleaf

I have an application where it is redundant to store a value for an
instance variable in a specialization of a class. I'll use numbers as
as an analogy (not that one would do this with numbers in common lisp):

One might have a class called complex-number that has two instance
variables real-part and imaginary part. A second class real-number
would be a specialization of complex-number but doesn't need to store
a 0 in the imaginary part. One could simply write an accessor that
always returns 0.

Has anyone used the MOP to allow a class such as real-number to not
have to store the unwanted instance variables? I'd love to have
someone send me an example so that I can avoid doing the work myself.

Thanks

|Bryan M. Kramer, Ph.D.	      416-978-7330, fax 416-978-1455|
|Department of Computer Science, University of Toronto      |
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