1.19.0[−][src]Struct std::cmp::Reverse
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> Debug for Reverse<T> where
T: Debug,
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T: Debug,
impl<T> Hash for Reverse<T> where
T: Hash,
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T: Hash,
fn hash<__H>(&self, state: &mut __H) where
__H: Hasher,
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__H: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl<T> Eq for Reverse<T> where
T: Eq,
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T: Eq,
impl<T> Clone for Reverse<T> where
T: Clone,
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T: Clone,
impl<T> PartialEq<Reverse<T>> for Reverse<T> where
T: PartialEq<T>,
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T: PartialEq<T>,
impl<T> PartialOrd<Reverse<T>> for Reverse<T> where
T: PartialOrd<T>,
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T: PartialOrd<T>,
fn partial_cmp(&self, other: &Reverse<T>) -> Option<Ordering>
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fn lt(&self, other: &Reverse<T>) -> bool
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fn le(&self, other: &Reverse<T>) -> bool
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fn ge(&self, other: &Reverse<T>) -> bool
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fn gt(&self, other: &Reverse<T>) -> bool
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impl<T> Default for Reverse<T> where
T: Default,
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T: Default,
impl<T> Ord for Reverse<T> where
T: Ord,
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T: Ord,
fn cmp(&self, other: &Reverse<T>) -> Ordering
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fn max(self, other: Self) -> Self
1.21.0[src]
fn min(self, other: Self) -> Self
1.21.0[src]
fn clamp(self, min: Self, max: Self) -> Self
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impl<T> Copy for Reverse<T> where
T: Copy,
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T: Copy,
Auto Trait Implementations
impl<T> UnwindSafe for Reverse<T> where
T: UnwindSafe,
T: UnwindSafe,
impl<T> RefUnwindSafe for Reverse<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Unpin for Reverse<T> where
T: Unpin,
T: Unpin,
impl<T> Send for Reverse<T> where
T: Send,
T: Send,
impl<T> Sync for Reverse<T> where
T: Sync,
T: Sync,
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
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ⓘImportant traits for &'_ mut F
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,