Re: opIndexUnary post in-/decrement how to ?

[Tejas via Digitalmars-d-learn]

On Wednesday, 14 July 2021 at 15:08:56 UTC, wjoe wrote:
On Wednesday, 14 July 2021 at 14:50:01 UTC, Mike Parker wrote:
On Wednesday, 14 July 2021 at 12:35:07 UTC, wjoe wrote:
[...]

It's how the contract of post-inc/dec work---pre-inc/dec 
return the modified value, post-inc/dec return the original 
value.

[...]

That makes a lot of sense now, thank you!

**IT WORKS NOW**

Thanks vit for the ```ref``` idea!

```d
import   std.stdio;

struct abc{
    int[100] a;
    static int temp;
    ref/*notice this ref*/ int opIndex(int index)return/*NOTICE 
THE RETURN*/ {
        return a[index];
    }
    int opIndexUnary(string s)(int index)
        if(s == "++"){
        return ++a[index];
        }
    int[] opUnary(string s)() if (s == "++"){
        return a[] += 1;
    }
}

void main (){
    abc s;

    writeln(s[0]++);// doesn't work for some reason EDIT: IT NOW 
WORKS!!!!!!!!

    writeln(s[0]);
    writeln(++s[0]);

   // writeln(s++);//but this works!!

   // writeln(s);
}

```