abs and minimum values

[Imperatorn]

On Friday, 29 October 2021 at 08:05:35 UTC, Dom DiSc wrote:
> On Thursday, 28 October 2021 at 21:26:04 UTC, kyle wrote:
>
>> Okay I checked the phobos docs and it does say "Limitations
>> Does not work correctly for signed intergal types and value 
>> Num.min." Should have looked there first, I know. Still seems 
>> pretty silly.
>
> I recommend to implement your own abs function this way (was 
> not accepted for phobos, as it now does NOT return the same 
> type as the argument, which was considered a "breaking change" 
> :-( ):
> ```D
> /// get the absolute value of x as unsigned type. always 
> succeeds, even for T.min
> Unsigned!T abs(T)(const(T) x) if(isIntegral!T)
> {
>    static if(isSigned!T) if(x < 0) return cast(Unsigned!T)-x;
>    return x;
> }
> ```

Just fix it for floats and it would be all round 100 times better 
than what we currently have ☀