Garbage Collection for Systems Programmers

[Gregor Mückl]

On Tuesday, 9 April 2024 at 00:47:55 UTC, Richard (Rikki) Andrew 
Cattermole wrote:
> D is in an excellent position to make write barriers opt-in, 
> with different strategies allowing for different GC designs.
>
> Its not an all or nothing situation that people seem to want it 
> to be.
>
> We can get the write barriers implemented and let some PhD 
> students implement some more advanced GC designs.

How would you add write barriers to D? Is it possible without 
extending the language?