The other option would be to change how floating point works. IEEE specifies operations, not names, so it would be totally valid to have <= on floats be a total order (using integer cpu instructions), and make a function called IEEEAreIdiotsWhoThinkThisIsFloatingPointLessThan which is the partial order that sucks.
For purposes of sorting, Rust does offer a non-IEEE order as f64::total_cmp. You can easily build a wrapper type that uses that for all comparisons, or use a crate that does it for you
total_cmp is precisely IEEE's separately specified total order for floats. It's just that the more common operators do something different, and that's perhaps better for most uses where NaN are inherently unexpected and generally indicate that some kind of error condition has occurred.
