On Wednesday, 9 September 2015 at 07:04:05 UTC, Per Nordlöw wrote:
- David's library and quantities use different interal representation. Davids 7-dimensional vector of rational integers (a la Boost) is hardcoded to represent SI units.
You must be confusing the library with something else (or me with another David). I'm pretty sure that my original proof-of-concept is the most flexible of all of them, coming with support for composing arbitrary runtime conversion functions, affine quantities and so on. SI unit definitions are merely predefined in a second module because they are commonly used.
That being said, my implementation is ages old and could probably be done much better today.
- David
