# [plt-scheme] Swindle get-slot and set-slot methods?

Hello all,
I'm curious if there's a way to have get-slot and set-slot methods in
swindle, as in the following example (this is very useful for wrapping
up an object which has an unusual data representation in a class which
provides a more standard way of accessing the underlying data):
(defclass <complex> ()
x y
(r :get (lambda (z)
(with-slots z (x y)
(sqrt (+ (square x) (square y)))))
:set (lambda (z new-r)
(with-slots z (x y theta)
(set! x (* new-r (cos theta)))
(set! y (* new-r (sin theta))))))
(theta :get (lambda (z)
(with-slots z (x y)
(if (= x 0)
(cond
((= y 0) 0)
((> y 0) (/ pi 2))
(else (- (/ pi 2)))))))
:set (lambda (z new-theta)
(with-slots z (x y r)
(set! x (* r (cos new-theta)))
(set! y (* r (sin new-theta)))))))
In this example, (slot-ref z 'r) would use the :get method, (slot-set!
z 'theta new-theta) would use the :set method, etc. Of course, you can
do this if you only access the "fake" slots via the generic functions
(complex-r ...) and company, but it would be neat if this could be made
to work with the (with-slots ...) macros and (slot-ref ...). Is there
a known way to do this cleanly?
Thanks for the help,
Will