How check if destructor has been called?

[Ben Jones]

On Tuesday, 13 September 2022 at 14:06:42 UTC, Injeckt wrote:
> Hi, I'm trying to check if destructor has been called, but when 
> I'm deleting class object I didn't get any calls from 
> destructor.
>
> myclass.d
>
>     ~this() {
>         this.log("\nDestructor\n");
>         this._free_trash();
>     }
>
>
> main.d
>
>     try {
>         server.server_init(server);
>     } catch (Exception e) {
>         server.log(e.msg);
>         server = null;
>     }

Classes are allocated on the GC heap, so even though you're 
setting the reference to null, it's not being collected at that 
point.  You can use `destroy` to make sure the destructor is 
called (see here: https://dlang.org/spec/class.html#destructors)

Or you could make your instance `scope` and then it basically 
follows the same lifetime rules as `struct`s.