Function classific::comparing_with

pub fn comparing_with<S, T: ?Sized, F, C>(
    map: F, 
    cmp: C
) -> ComparingWith<S, T, F, C> where
    S: ?Sized,
    T: Ord,
    F: Fn(&S) -> T,
    C: Comparator<T>, 

This function returns a Comparator for S which first maps values to T then compare them with cmp.

Examples

use std::cmp::Ordering;
use classific::{Comparator, comparing_with, reverse_order};

assert_eq!(comparing_with(|t: &(i8, i8)| t.1, reverse_order()).cmp(&(3, 1), &(2, 2)), Ordering::Greater);