On Monday, 9 February 2026 at 20:19:26 UTC, Brother Bill wrote:
Console output:
```
Creating Duration: 7:30:15
Duration is: 07:30:15Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
```
If you add a copy constructor to Duration, you can see when it
gets copied:
```d
this(ref Duration d)
{
this.tupleof = d.tupleof;
writeln("copying Duration: ", toString);
}
```
I get:
```
Creating Duration: 7:30:15
copying Duration: 07:30:15
copying Duration: 07:30:15
Duration is: copying Duration: 07:30:15
copying Duration: 07:30:15
07:30:15Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
Destroying Duration: 7:30:15
```
Each copy needs to get destroyed, as well as the original.
