Struct std::cmp::Reverse 1.19.0[−][src]
#[repr(transparent)]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.
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]);Run
Trait Implementations
impl<T> PartialOrd<Reverse<T>> for Reverse<T> where
T: PartialOrd<T>,
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impl<T> PartialOrd<Reverse<T>> for Reverse<T> where
T: PartialOrd<T>,
[src]impl<T> Copy for Reverse<T> where
T: Copy,
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T: Copy,
impl<T> Eq for Reverse<T> where
T: Eq,
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T: Eq,
impl<T> StructuralEq for Reverse<T>
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impl<T> StructuralPartialEq for Reverse<T>
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Auto Trait Implementations
impl<T> RefUnwindSafe for Reverse<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for Reverse<T> where
T: Send,
T: Send,
impl<T> Sync for Reverse<T> where
T: Sync,
T: Sync,
impl<T> Unpin for Reverse<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for Reverse<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> Borrow<T> for T where
T: ?Sized,
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impl<T> Borrow<T> for T where
T: ?Sized,
[src]pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut I
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
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Notable traits for &'_ mut I
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut I
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
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Notable traits for &'_ mut I
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W