Why is Phobos `Flag` so overthought ?

[Julian Fondren]

On Monday, 6 May 2024 at 17:55:49 UTC, user1234 wrote:
> I think this just works:
>
> ```d
> enum Flag : bool
> {
>     no,
>     yes
> }
>
> alias AllowVancancy = Flag; // example usage
> ```

```d
import std.stdio : writeln;

enum Flag : bool { no, yes }
alias Traditional = Flag;
alias Color = Flag;

void hello(Traditional traditional, Color color) {
     if (traditional && color) {
         writeln("\x1b[31;1mhello world\x1b[0m");
     } else if (traditional && !color) {
         writeln("hello world");
     } else if (!traditional && color) {
         writeln("\x1b[31;1mHello, world!\x1b[0m");
     } else {
         writeln("Hello, world!");
     }
}

void main() {
     hello(Color.yes, Traditional.yes); // this is wrong, but 
accepted
}
```