> e.g. at run time one can add members to classes Which is something that can be done in CLOS, though. And in a much more thought out fashion, as usual with th

> e.g. at run time one can add members to classes Which is something that can be done in CLOS, though. And in a much more thought out fashion, as usual with the CLOS/MOP, cf https://www.lispworks.com/documentation/HyperSpec/Body/04_cf.htm https://www.lispworks.com/documentation/HyperSpec/Body/04_cf...