Struct core::cmp::Reverse 1.19.0[−][src]
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:
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]);Run
Trait Implementations
impl<T: PartialEq> PartialEq for Reverse<T>[src]
impl<T: PartialEq> PartialEq for Reverse<T>fn eq(&self, other: &Reverse<T>) -> bool[src]
fn eq(&self, other: &Reverse<T>) -> boolThis method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &Reverse<T>) -> bool[src]
fn ne(&self, other: &Reverse<T>) -> boolThis method tests for !=.
impl<T: Eq> Eq for Reverse<T>[src]
impl<T: Eq> Eq for Reverse<T>impl<T: Debug> Debug for Reverse<T>[src]
impl<T: Debug> Debug for Reverse<T>fn fmt(&self, f: &mut Formatter) -> Result[src]
fn fmt(&self, f: &mut Formatter) -> ResultFormats the value using the given formatter. Read more
impl<T: Copy> Copy for Reverse<T>[src]
impl<T: Copy> Copy for Reverse<T>impl<T: Clone> Clone for Reverse<T>[src]
impl<T: Clone> Clone for Reverse<T>fn clone(&self) -> Reverse<T>[src]
fn clone(&self) -> Reverse<T>Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0[src]
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
impl<T: Default> Default for Reverse<T>[src]
impl<T: Default> Default for Reverse<T>impl<T: Hash> Hash for Reverse<T>[src]
impl<T: Hash> Hash for Reverse<T>fn hash<__HT: Hasher>(&self, state: &mut __HT)[src]
fn hash<__HT: Hasher>(&self, state: &mut __HT)Feeds this value into the given [Hasher]. Read more
fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized, 1.3.0[src]
fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized, Feeds a slice of this type into the given [Hasher]. Read more
impl<T: PartialOrd> PartialOrd for Reverse<T>[src]
impl<T: PartialOrd> PartialOrd for Reverse<T>fn partial_cmp(&self, other: &Reverse<T>) -> Option<Ordering>[src]
fn partial_cmp(&self, other: &Reverse<T>) -> Option<Ordering>This method returns an ordering between self and other values if one exists. Read more
fn lt(&self, other: &Self) -> bool[src]
fn lt(&self, other: &Self) -> boolThis method tests less than (for self and other) and is used by the < operator. Read more
fn le(&self, other: &Self) -> bool[src]
fn le(&self, other: &Self) -> boolThis method tests less than or equal to (for self and other) and is used by the <= operator. Read more
fn ge(&self, other: &Self) -> bool[src]
fn ge(&self, other: &Self) -> boolThis method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
fn gt(&self, other: &Self) -> bool[src]
fn gt(&self, other: &Self) -> boolThis method tests greater than (for self and other) and is used by the > operator. Read more
impl<T: Ord> Ord for Reverse<T>[src]
impl<T: Ord> Ord for Reverse<T>fn cmp(&self, other: &Reverse<T>) -> Ordering[src]
fn cmp(&self, other: &Reverse<T>) -> OrderingThis method returns an Ordering between self and other. Read more
fn max(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
fn max(self, other: Self) -> Self where
Self: Sized, Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
fn min(self, other: Self) -> Self where
Self: Sized, Compares and returns the minimum of two values. Read more