Re: Why dtor are not executed when removing a struct from associative arrays?

[jfondren via Digitalmars-d-learn]

On Monday, 20 September 2021 at 12:23:00 UTC, Learner wrote:
I was expecting something like going out of scope for that
```(D)
import std.stdio;

struct S
{
    ~this()
    {
        writeln("S is being destructed");
    }
}

void main()
{
        S[int] aa;
    aa[1] = S();
    aa.remove(1);
    writeln("Why no dtor call on remove?");
}

I was expecting S instance dtor called
S is being destructed
```

This looks to me like a bug, as

```d
import core.memory : GC;
GC.collect;
```

immediately after the `.remove` will call the struct's destructor.

I only see https://issues.dlang.org/show_bug.cgi?id=20379 as 
related, though.

Here's another workaround:

```d
alias purge = (kv, k) { kv[k] = typeof(kv[k]).init; kv.remove(k); 
};
```

with the same caveat of the `.init` structs also getting 
destructed later, you can use that in place of `.remove`.