sumtypes for D

[zjh]

On Tuesday, 29 November 2022 at 07:29:21 UTC, Walter Bright wrote:
> On 11/28/2022 6:37 PM, zjh wrote:

> I think you meant "fork" :-/


I just wonder if it is possible to use `plug-ins` like `vim` to 
expand `D`.
Although the `official` does not agree with this `behavior`, but 
because the code is released along with the official 
installation, as long as you turn on a `switch`, you will gain 
the ability,like `class level private`.