How to access private variable of outer class from an inner struct

[Paul Backus]

On Sunday, 15 January 2023 at 12:26:15 UTC, thebluepandabear 
wrote:
> If I have the following code:
>
> ```D
> class X {
>     private int num;
>
>     struct Y {
>         // how to access num?
>     }
> }
> ```
>
> How would I access `num` from `Y`?
>
> Whenever I try to I get a compilation error.
>
> I believe that it's possible for nested/inner classes, but I 
> don't know if it's possible for structs.
>
> Help would be apprciated.

I don't think this works for structs. As a workaround, you give 
your struct an explicit reference to the outer class, like this:

```D
class X {
     private int num;

     struct Y {
         X outer;
         int fun() { return outer.num; }
     }
}
```