Can't create "shared" Mutex with "-preview=nosharedaccess"

[Simen Kjærås]

On Sunday, 28 August 2022 at 21:15:59 UTC, Gavin Ray wrote:
> ```
> class DiskManager
> {
>     shared ReadWriteMutex dbIOMutex;
>
>     this() shared
>     {
>         this.dbIOMutex = new shared ReadWriteMutex();
>     }
> }
> ```

The solution for now is to cast away shared on the LHS (and not 
use shared on the rhs):

```
     this() shared
     {
         cast()this.dbIOMutex = new ReadWriteMutex();
     }
```

However, the Child/Parent structs in your code, and 
https://issues.dlang.org/show_bug.cgi?id=21793 seem to indicate 
that the cast should not be necessary. I would guess it's a 
detail about how classes are reference types that messes things 
up.

--
   Simen