bool concat patternmatching with switch

[monkyyy]

On Tuesday, 4 June 2024 at 15:55:50 UTC, Quirin Schroll wrote:
> 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.)

I kinda doubt its a mere enhancment, d has the dumb c style 
switches that are thin abstractions of goto; this will require a 
preprocessing step that im unsure if it exists at all currently