Built-in sumtypes, case and noreturn: why block enders should be expressions.

[rikki cattermole]

On 24/10/2022 7:20 PM, FeepingCreature wrote:
> 
> ```
> (int | string) foo;
> ...
> int i = foo.case(int i: i, string s: return null);
> ```

That is kinda brilliant.

The first case sets what actually gets returned the others all return 
nothing and are inherited from it.

I assume if the other cases get hit that it sets to 0? (unless of course 
its boxed)