Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ?

2017-06-07 16:43 GMT+02:00 Steven Costiou <steven.costiou@kloum.io>:

Yes but when you do that you loose all the states from "a" (at least the values). You have to do state migration management...

You just need extra step to copy all state from old object: b := B new. b copyFrom: a. a becomeForward: b.