What is that "enum function" supposed to be ?

[Paul Backus]

On Monday, 19 July 2021 at 21:16:57 UTC, Elmar wrote:
> I'd like to know:
> - What does return type `enum` mean?

It just means `auto`. Probably it shouldn't be allowed at all, 
but D's parser is sometimes overly-permissive and will accept 
things like this even when they don't really make sense.

For example, you can also declare a `@nogc` variable:

```d
@nogc x = new Object;
```

The `@nogc` attribute doesn't do anything here, but the compiler 
allows it anyway.