On Sat, Apr 24, 2021, 21:44 Olle Härstedt <olleharstedt@gmail.com> wrote:
> 2021-04-24 17:59 GMT+02:00, Saif Eddin Gmati <azjezz@void.tn>:
> >> Doesn't this violate the principle: It should be possible to add new
> >> features without touching old code?
> >
> > This depends on which syntax is picked, both for and attribute syntax
> will
> > be completely BC.
>
> I'm not talking about BC, but the maintainability of the new feature
> itself. For the shape example, you'd need to edit the original file
> for each new shape you add, which is detrimental for maintainability
> and scalability. So what's a good use-case?
>
The main use-case of sealed types is being able to declare total functions
around them.