Anyway to achieve the following

[Rekel]

On Saturday, 14 August 2021 at 20:50:47 UTC, Carl Sturtivant 
wrote:
> ```
> struct S {
>   int x = 1234;
> }
>
> void main() {
>   import std.stdio;
>    S s;
>    //construction of a using &(s.x)
>    auto a = Ref!(int)(&s.x);
>    writeln(a); //displays 1234
>    s.x += 1;
>    writeln(a); //displays 1235
>    a += 1;
>    writeln(s.x); //displays 1236
> }
>
> struct Ref(T) {
>   T* ptr;
>   this(T* p) { ptr = p; }
>   string toString() { import std.conv; return to!string(*ptr); }
>   ref T var() { return *ptr; }
>   alias var this;
> }
> ```

Wow you can alias this a function? TIL!