Where is floating point next{Up,Down}?

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On Tuesday, 17 January 2017 at 23:41:27 UTC, Nordlöw wrote:
> On Tuesday, 17 January 2017 at 23:38:46 UTC, Ali Çehreli wrote:
>> Found'em! :)
>>
>>   https://dlang.org/phobos/std_math.html#.nextUp
>
> Thanks!

(Shouts into the soundless void) 
https://github.com/pineapplemachine/mach.d/blob/master/mach/math/floats/neighbors.d