Remove switch case fallthrough

[Basile B.]

On Thursday, 13 May 2021 at 14:12:40 UTC, Ola Fosheim Grøstad 
wrote:
> On Thursday, 13 May 2021 at 13:55:10 UTC, IGotD- wrote:
>> In practice this is possible by just add another keyword. 
>> Something like "switch2", "switchb", can't really come up with 
>> good name. Then you just have a switch with break as default. 
>> What I have against it is that a new type of bugs will occur 
>> where the programmers accidentally mix up the two.
>
> Just use a different keyword than "case"? Like "when"?

or "on", if this does not cause problems with the try catch 
construct.