Focus (was Re: draft proposal for Sum Types for D)

[Kagamin]

On Saturday, 3 December 2022 at 16:17:19 UTC, John Colvin wrote:
> On Tuesday, 29 November 2022 at 06:26:20 UTC, Walter Bright 
> wrote:
>> Go ahead, Make My Day! Destroy!
>>
>> https://github.com/WalterBright/DIPs/blob/sumtypes/DIPs/1NNN-(wgb).md
>
> I don’t want to be discouraging of good work, but D is not 
> lacking in great features, it is lacking in its implementation 
> of the basics.

Rationale explains it as a safe union. Whether safe union is 
really needed is a different question, but at least it's 
consistent with the safety effort.