>
> "Empty case ranges such as case -1 ... 0 are valid, but recommended to be
> diagnosed. "
>
> Why is that an empty range?
>

Because I'm an idiot and meant to write 0 ... -1.

Re the "A noteworthy quirk of the C2y feature" paragraph, that was
> documented decades before it got into C2y:
> https://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html
> It might be worth linking to that page for the implementation experience
> talking about the extension.


Thanks, added a link, though not in the implementation experience section.