#[repr(transparent)]pub struct Reverse<T>(pub T);
Expand description
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.
§Examples
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]);
RunTuple Fields§
§0: T
Trait Implementations§
source§impl<T: Ord> Ord for Reverse<T>
impl<T: Ord> Ord for Reverse<T>
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Compares and returns the maximum of two values. Read more
source§impl<T: PartialEq> PartialEq for Reverse<T>
impl<T: PartialEq> PartialEq for Reverse<T>
source§impl<T: PartialOrd> PartialOrd for Reverse<T>
impl<T: PartialOrd> PartialOrd for Reverse<T>
impl<T: Copy> Copy for Reverse<T>
impl<T: Eq> Eq for Reverse<T>
impl<T> StructuralPartialEq for Reverse<T>
Auto Trait Implementations§
impl<T> RefUnwindSafe for Reverse<T>where
T: RefUnwindSafe,
impl<T> Send for Reverse<T>where
T: Send,
impl<T> Sync for Reverse<T>where
T: Sync,
impl<T> Unpin for Reverse<T>where
T: Unpin,
impl<T> UnwindSafe for Reverse<T>where
T: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more