removing default case requirement?

[Salih Dincer]

On Saturday, 1 April 2023 at 07:32:28 UTC, claptrap wrote:
> How often does anyone use "default: break"?

If you are a lazy (actually talented) programmer 😀


In fact, if you use enums, the compiler will warn you with the 
comment in the code.
But this way program produces 2 lines of output likes this:

> humid: 2
> I'm in Silifke Asthma Cave

I learned this method from Walter in Dconf'22.  Remove the 
toggle-comment at the beginning of the final to try.
```d
enum Weather { hot, humid, cold,
              sunny, windy, cloudy,
          drizzling, rainy, foggy
}

string shallWeGo(Weather w)
{
     //final switch(w) {/*
     switch(w) {
        default: return home();//*/
        case Weather.hot:
          w.writeln(": ", 1);
          return sea();
        case Weather.humid:
          w.writeln(": ", 2);
          return cave();
        case Weather.sunny:
          w.writeln(": ", 3);
          return beach();
        case Weather.cloudy:
          w.writeln(": ", 3);
          return home;
     }
}

import std.stdio;
void main()
{
     auto choice = Weather.humid;
     choice.shallWeGo().writeln;
}

auto sea() => "";
auto home() => "";
auto cave()
     => "I'm in Silifke Asthma Cave";
auto beach() => "";

/* Without the final keyword you will get a compilation error:
onlineapp.d(8): Error: missing cases for `enum` members in `final 
switch`:
onlineapp.d(8):        `cold`
onlineapp.d(8):        `windy`
onlineapp.d(8):        `drizzling`
onlineapp.d(8):        `rainy`
onlineapp.d(8):        `foggy`
*/

```

SDB at 79