Non-ugly ways to implement a 'static' class or namespace?

[zjh]

On Friday, 20 January 2023 at 11:28:23 UTC, thebluepandabear 
wrote:
> Hi,
>
> In Java/C# you can create purely static classes.
> ...



Last time, someone proposed to add `private` like `C++'s`, and 
then it was the same,they are always unwilling to add facilities 
useful to others, and then he left `D`.