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> Default for Reverse<T> where
    T: Default, [src] 
impl<T> Default for Reverse<T> where
    T: Default, impl<T> PartialEq<Reverse<T>> for Reverse<T> where
    T: PartialEq<T>, [src] 
impl<T> PartialEq<Reverse<T>> for Reverse<T> where
    T: PartialEq<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> Ord for Reverse<T> where
    T: Ord, [src] 
impl<T> Ord for Reverse<T> where
    T: Ord, 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) -> Self1.21.0[src] 
fn max(self, other: Self) -> SelfCompares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self1.21.0[src] 
fn min(self, other: Self) -> SelfCompares and returns the minimum of two values. Read more
impl<T> PartialOrd<Reverse<T>> for Reverse<T> where
    T: PartialOrd<T>, [src] 
impl<T> PartialOrd<Reverse<T>> for Reverse<T> where
    T: PartialOrd<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: &Reverse<T>) -> bool[src] 
fn lt(&self, other: &Reverse<T>) -> boolThis method tests less than (for self and other) and is used by the < operator. Read more
fn le(&self, other: &Reverse<T>) -> bool[src] 
fn le(&self, other: &Reverse<T>) -> boolThis method tests less than or equal to (for self and other) and is used by the <= operator. Read more
fn ge(&self, other: &Reverse<T>) -> bool[src] 
fn ge(&self, other: &Reverse<T>) -> boolThis method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
fn gt(&self, other: &Reverse<T>) -> bool[src] 
fn gt(&self, other: &Reverse<T>) -> boolThis method tests greater than (for self and other) and is used by the > operator. Read more
impl<T> Hash for Reverse<T> where
    T: Hash, [src] 
impl<T> Hash for Reverse<T> where
    T: Hash, fn hash<__HT>(&self, state: &mut __HT) where
    __HT: Hasher, [src] 
fn hash<__HT>(&self, state: &mut __HT) where
    __HT: Hasher, Feeds this value into the given [Hasher]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 1.3.0[src] 
fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, Feeds a slice of this type into the given [Hasher]. Read more
impl<T> Debug for Reverse<T> where
    T: Debug, [src] 
impl<T> Debug for Reverse<T> where
    T: Debug, fn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src] 
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter. Read more
impl<T> Copy for Reverse<T> where
    T: Copy, [src] 
impl<T> Copy for Reverse<T> where
    T: Copy, impl<T> Eq for Reverse<T> where
    T: Eq, [src] 
impl<T> Eq for Reverse<T> where
    T: Eq, impl<T> Clone for Reverse<T> where
    T: Clone, [src] 
impl<T> Clone for Reverse<T> where
    T: Clone, Auto Trait Implementations
Blanket Implementations
impl<T> From for T[src] 
impl<T> From for Timpl<T, U> TryFrom for T where
    T: From<U>, [src] 
impl<T, U> TryFrom for T where
    T: From<U>, type Error = !
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src] 
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>Performs the conversion.
impl<T, U> TryInto for T where
    U: TryFrom<T>, [src] 
impl<T, U> TryInto for T where
    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>[src] 
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>Performs the conversion.
impl<T, U> Into for T where
    U: From<T>, [src] 
impl<T, U> Into for T where
    U: From<T>, impl<T> Borrow for T where
    T: ?Sized, [src] 
impl<T> Borrow for T where
    T: ?Sized, ⓘImportant traits for &'a mut Ifn borrow(&self) -> &T[src] 
fn borrow(&self) -> &TImmutably borrows from an owned value. Read more
impl<T> BorrowMut for T where
    T: ?Sized, [src] 
impl<T> BorrowMut for T where
    T: ?Sized, ⓘImportant traits for &'a mut Ifn borrow_mut(&mut self) -> &mut T[src] 
fn borrow_mut(&mut self) -> &mut TMutably borrows from an owned value. Read more
impl<T> Any for T where
    T: 'static + ?Sized, [src] 
impl<T> Any for T where
    T: 'static + ?Sized, fn get_type_id(&self) -> TypeId[src] 
fn get_type_id(&self) -> TypeId🔬 This is a nightly-only experimental API.  (get_type_id #27745)
this method will likely be replaced by an associated static
Gets the TypeId of self. Read more
impl<T> ToOwned for T where
    T: Clone, [src] 
impl<T> ToOwned for T where
    T: Clone, type Owned = T
fn to_owned(&self) -> T[src] 
fn to_owned(&self) -> TCreates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)[src] 
fn clone_into(&self, target: &mut T)🔬 This is a nightly-only experimental API.  (toowned_clone_into #41263)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more