First we’ll look at Distance. Distance and Current are super similar, they just have different families, so there’s no point in looking at both of them.

We can get the actual value of the current as so:

And if we want to get the unit that was provided:

We can convert between the units in two different ways:

All expected mathematical operations are defined:

Note that all of these operations are non-mutating, the value of tenMM never changes, instead, you need to store the results of the operations, and use the new output instead.

These operations are also written to avoid making allocation where possible, which means, where possible, tenMM will be returned, rather than a new Distance.

Finally, all operations involving more than one ReifiedUnit value, result in a ReifiedUnit with a unit of the left hand side, so if you chain a whole bunch of operations on a Distance with unit DistanceUnits.METER, then the result should also have unit DistanceUnits.METER.

Comparisons are also defined:

IntroductionAngles