std::cmp::Reverse

Struct std::cmp::Reverse

pub struct Reverse<T>(pub T);

A helper struct for reverse ordering.

This struct is a helper to be used with functions like Vec::sort_by_key and can be used to reverse order a part of a key.

Example usage:

#![feature(reverse_cmp_key)]
use std::cmp::Reverse;

let mut v = vec![1, 2, 3, 4, 5, 6];
v.sort_by_key(|&num| (num > 3, Reverse(num)));
assert_eq!(v, vec![3, 2, 1, 6, 5, 4]);

Trait Implementations

impl<T> Eq for Reverse<T> where
    T: Eq,  [src]

impl<T> Debug for Reverse<T> where
    T: Debug,  [src]

fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>

impl<T> Ord for Reverse<T> where
    T: Ord,  [src]

fn cmp(&self, other: &Reverse<T>) -> Ordering

impl<T> PartialEq<Reverse<T>> for Reverse<T> where
    T: PartialEq<T>,  [src]

fn eq(&self, __arg_0: &Reverse<T>) -> bool

fn ne(&self, __arg_0: &Reverse<T>) -> bool

impl<T> PartialOrd<Reverse<T>> for Reverse<T> where
    T: PartialOrd<T>,  [src]

fn partial_cmp(&self, other: &Reverse<T>) -> Option<Ordering>

fn lt(&self, other: &Reverse<T>) -> bool

fn le(&self, other: &Reverse<T>) -> bool

fn ge(&self, other: &Reverse<T>) -> bool

fn gt(&self, other: &Reverse<T>) -> bool