How to implement opCmp?

[Honey via Digitalmars-d-learn]

On Sunday, 11 June 2017 at 15:40:42 UTC, Honey wrote:
> On Sunday, 11 June 2017 at 15:24:30 UTC, Honey wrote:
>> Doesn't it make sense to introduce another overload of cmp 
>> similar to Steve's doCmp [2] right at that spot?
>
> Moreover, it seems that std.algorithm.cmp should employ three 
> way comparison as well.

Forget about it. I think a different approach is required, here.