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

[thebluepandabear]

On Sunday, 15 January 2023 at 13:23:20 UTC, matheus wrote:
> On Sunday, 15 January 2023 at 12:44:51 UTC, thebluepandabear 
> wrote:
>> ...
>> How will the variable `outer` become the reference to the 
>> current `X` object (if that makes sense?). Does the compiler 
>> do it automatically?
>
> I think you'll need to do this:
>
> class X {
>     private int num;
>
>     struct Y {
>         X outer;
>         int fun() { return outer.num; }
>     }
>
>     Y y;
>     this(){
>         y = Y(this);
>     }
> }
>
> void main(){
>     import std.stdio : writeln;
>     auto x = new X();
>     x.num = 10;
>     writeln(x.num);
>     writeln(x.y.fun());
> }
>
> Prints:
>
> 10
> 10
>
> Matheus.

ah, that's annoying, but I guess it's the only solution as it 
stands.