Function classific::partial_order_or

pub fn partial_order_or<T: ?Sized, C>(cmp: C) -> PartialOrderOr<T, C> where
    T: PartialOrd<T>,
    C: Comparator<T>, 

This function returns a Comparator for T which follows the semantics of PartialOrd::partial_cmp but when that returns None it calls the underlying Comparator cmp.

See at_least and at_greatest.

Examples

use std::cmp::Ordering;
use classific::{Comparator, at_least, partial_order_or};

assert_eq!(partial_order_or(at_least(|f: &f64| f.is_nan())).cmp(&f64::NAN, &1_f64), Ordering::Less);
assert_eq!(partial_order_or(at_least(|f: &f64| f.is_nan())).cmp(&f64::NAN, &f64::NAN), Ordering::Equal);
assert_eq!(partial_order_or(at_least(|f: &f64| f.is_nan())).cmp(&1_f64, &f64::NAN), Ordering::Greater);