[Review] SE-0117: Default classes to be non-subclassable publicly

(Ted van Gaalen) #1

  * What is your evaluation of the proposal?

With all due respect, what is proposed here is imho completely unnecessary
and needlessly complicates Swift further.

- in Object oriented development, subclassing should be encouraged, not limited.
if one desires a class not to be subclassed simply add the modifier “final”

Using “final” (as in Java or C++) or “sealed” (as in C#) is imho the best way to do it.

  * Is the problem being addressed significant enough to warrant a change to Swift?

No !

  * Does this proposal fit well with the feel and direction of Swift?

This is a subjective domain. can’t answer that. Anyway, it’s against the basic principles of OOD/OOP

  * If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?


  * How much effort did you put into your review? A glance, a quick reading, or an in-depth study?

I’ve read the proposal...

My opinion is based upon years of experience with OOP languages like Smalltalk, Java, Delphi Pascal, Objective C and C++

Kind Regards, now from speyer.de.