Sum Types - first draft

[Dukc]

Paul Backus kirjoitti 11.9.2024 klo 17.34:
> 
> For the record, `std.sumtype` has had no substantial changes made to it 
> since Walter posted his original proposal on November 28th, 2022. This 
> can easily be seen by viewing the git history:
> 
> https://github.com/dlang/phobos/commits/master/std/sumtype.d

I suspect he might be confusing it with the old `std.variant : 
Algebraic`. That would explain why he thought your sum type has 
shortcomings it actually doesn't.