Can someone explain this?

[MoonlightSentinel]

On Saturday, 6 February 2021 at 14:39:38 UTC, Jeff wrote:
> So, I'm guessing there's something going on under-the-hood 
> using the ~ operator with the enum and I'd like to understand 
> what it is.

Enum to string conversion is usually implemented using the name 
of the enum member, regardless of it's value (which might be any 
type).

String concatenation is not defined for A, so the enum member is 
implicitly converted to it's base type (see [1], paragraph 5).

> Likewise, if there's an easier method of getting the "value of 
> enum" I haven't discovered yet, that'd be just as nice to know. 
> ;)
>

You can use an is expression to determine the base type...

```
is(A BaseType == enum)
```

...and use `cast(BaseType) A.foo`

[1] https://dlang.org/spec/enum.html#named_enums