std.sumtype?

[Paul Backus]

On Thursday, 18 March 2021 at 18:40:49 UTC, ryuukk_ wrote:
> I'd love to help create a DIP for it, but making it as a lib 
> now, and then removing it few months/year later will feel bad 
> because that's gonna be code people will have to change, again, 
> hence the importance of not taking shortcuts, we need think 
> long term

There is no need to remove the library even if a built-in version 
is added. The library version can simply be updated to alias 
itself to the built-in version, and its documentation can be 
hidden to discourage new code from using it.