Mark Dickinson <dicki...@gmail.com> added the comment: Here's a version of the patch that adds exact comparisons between the various numeric types. The only slightly tricky comparison is the Fraction <-> Decimal one: an obvious strategy is to convert the Decimal exactly to a Fraction and then use the fraction comparison, but this is inefficient for Decimal instances with large exponent. So instead, we compare a Decimal `x` with a Fraction `n/d` by comparing `x*d` with `n` in the Decimal domain.
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