bool concat patternmatching with switch

[Quirin Schroll]

On Tuesday, 28 May 2024 at 19:39:45 UTC, monkyyy wrote:
> ```d
> switch(i%3==0,i%5==0){
>   case 1,1: return "fizzbuzz";
>   case 0,1: return "buzz";
>   case 1,0: return "fizz";
>   case ?,?: return i.to!string;
> }
> ```

Two points: You need parens around the case stuff: `case (0,1):` 
because `case 0,1:` already exists and means `case 0: case 1:`.

I filed an [enhancement 
issue](https://issues.dlang.org/show_bug.cgi?id=24585) for the 
basic idea. It’s just a lowering that the front-end can do and 
doesn’t require a DIP.

I guess your idea with the `?` is the only part that needs a DIP. 
(In your example, one could use `default:` though.)