Wishlist proposal, documenting fn arg as in or out or mod

[Richard (Rikki) Andrew Cattermole]

On 21/06/2023 3:01 AM, Cecil Ward wrote:
> I would love to be able to document my arguments

If you want a way to do it without compiler backed you can use UDA's:

```d
void main() {
     func(2);
}

enum MyThing;

void func(@MyThing int x) {
}
```