Rewrite floating-point comparison

• Use a fixed epsilon for small values
• Use a scaled epsilon for bigger values
• Handle NaN
• Handle Inf
• Fully constexpr capable
• Make (almost) all operators constexpr capable

The epsilon can be supplied as a parameter to the comparison funcs. The default epsilon can be changed by defining MANTLE_API_DEFAULT_EPS before inclusion of MantleAPI headers. This allows for adjustment of the epsilon for operator==.

Relates to #18

The program was tested solely for our own use cases, which might differ from yours.

Martin Stump martin.stump@mercedes-benz.com on behalf of Mercedes-Benz Tech Innovation GmbH, Provider Information