Any way to create derived classes from Exception with canned messages?

[Jeremy T. Gibson]

On Saturday, 31 July 2021 at 11:30:06 UTC, Adam D Ruppe wrote:
> On Saturday, 31 July 2021 at 08:25:56 UTC, Jeremy T. Gibson 
> wrote:
>> Now, 
>> https://github.com/dlang/druntime/blob/master/src/object.d 
>> clearly expresses that the constructors of Exception are @nogc.
>
> That doesn't mean your constructors have to be! You can do 
> whatever you want. Constructors aren't an inherited interface.

Hah!  I knew it was something simple.  I should have guessed, 
when I was being shouted at when I tried to use the "override" 
keyword (obviously they're not virtual either), that I was 
approaching it all wrong.