Providing implicit conversion of

[Nick Treleaven]

On Monday, 22 January 2024 at 01:14:06 UTC, Steven Schveighoffer 
wrote:
>> The language should not allow unary unsigned anything.
>
> This is unlikely to get fixed, just due to the nature of D's 
> philosophy when it comes to C compatibility.
>
> It would also break a lot of existing code.

I think the bigger issue is implicit conversion from unsigned to 
signed of the same bit size. In a future edition D could require 
a larger signed type in order to implicitly convert from 
unsigned. That would have caught the `long johnstone =` line.

Also signed should never convert to unsigned, though I don't 
think that's happening here.