Improving our safety with quantities

[mpusz]

• self-driving cars
• mismeasure of measure
• unit conversions
• quantity spec conversions and common_quantity_spec
• quantity kinds
• non-negative quantities
• safe equations (arithmetic, quantity character, multiplication, division, dot, cross, norm)
• value preserving conversions
• affine space
• no runtime or space overhead (compared to Python and Java)

[mpusz]

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p1935r2.html#lack-of-strong-types

https://github.com/LK8000/LK8000/blob/af404168ff5f92b03ab0c5db336ed8f01a792cda/Common/Header/McReady.h#L7-L21 https://github.com/LK8000/LK8000/blob/af404168ff5f92b03ab0c5db336ed8f01a792cda/Common/Source/Library/PressureFunctions.cpp#L134-L136 https://github.com/LK8000/LK8000/blob/af404168ff5f92b03ab0c5db336ed8f01a792cda/Common/Header/NavFunctions.h#L7C1-L27

[JohelEGP]

Very relevant with regards to the current API:

• https://github.com/mpusz/mp-units/issues/412#issuecomment-1412806744.
• https://github.com/mpusz/mp-units/issues/412#issuecomment-1412828928.