No need for version expression is a lie

[Kagamin]

On Tuesday, 22 August 2023 at 22:03:41 UTC, ryuukk_ wrote:
> Since i got confused with ``version(linux)`` and 
> ``version(Linux)``, i try to limit my use of that kind of code 
> to a strict minimum.. but sometimes it just is not possible to 
> avoid using it
>
> I wish it was represented as an enum, similar to how compiler 
> do the ``__FILE__``
>
> But for that to work, D would need to support .enum so you 
> wouldn't need to import anything
>
> In D that would look like:
>
> ```D
> enum STUFF = static switch(__OS__) {
>     case OS.Linux:
>     break;
>     default:
>     break;
> };
> ```

Like this?
```
enum OS
{
	FreeBSD, Linux, NetBSD, Windows
}

OS getOs()
{
	version(FreeBSD)return OS.FreeBSD;
	version(linux)return OS.Linux;
	version(NetBSD)return OS.NetBSD;
	version(Windows)return OS.Windows;
	assert(false,"unsupported OS");
}
```