Use nholthaus/units for unit safety

[jamesturner246]

A number of places --i.e. in risk factor model code -- are quite confusing with respect to the unit that each variable uses.

Using a unit library such as unit could help clarify and enforce proper unit use.

NOTE: we need to confirm the units used with the modelling team first.

[chiphogg]

Stumbled on this issue. Here's a GitHub search for C++ units libraries, and a comparison of leading options, to help you pick the one that's best for you. (Disclosure: I'm the author of one of the libraries, the one that is hosting the comparison page.)

[alexdewar]

@chiphogg Looks intriguing. Thanks! We'll check it out.