Struct creusot_contracts::std::cmp::Reverse

#[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]);

Tuple Fields

0: T

Trait Implementations

impl<T> Clone for Reverse<T>

where T: Clone,

fn clone(&self) -> Reverse<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Reverse<T>)

Performs copy-assignment from source.

impl<T> Debug for Reverse<T>

where T: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<T: DeepModel> DeepModel for Reverse<T>

fn deep_model(self) -> Self::DeepModelTy

logic

pearlite! { Reverse(self.0.deep_model()) }

type DeepModelTy = Reverse<<T as DeepModel>::DeepModelTy>

impl<T> Default for Reverse<T>

where T: Default,

fn default() -> Reverse<T>

Returns the “default value” for a type.

impl<T> Hash for Reverse<T>

where T: Hash,

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T> Ord for Reverse<T>

where T: Ord,

fn cmp(&self, other: &Reverse<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl<T: OrdLogic> OrdLogic for Reverse<T>

fn cmp_log(self, o: Self) -> Ordering

logic

match self.0.cmp_log(o.0) {
    Ordering::Equal => Ordering::Equal,
    Ordering::Less => Ordering::Greater,
    Ordering::Greater => Ordering::Less,
}

fn cmp_le_log(x: Self, y: Self)

law

ensures

x.le_log(y) == (x.cmp_log(y) != Ordering::Greater)

fn cmp_lt_log(x: Self, y: Self)

law

ensures

x.lt_log(y) == (x.cmp_log(y) == Ordering::Less)

fn cmp_ge_log(x: Self, y: Self)

law

ensures

x.ge_log(y) == (x.cmp_log(y) != Ordering::Less)

fn cmp_gt_log(x: Self, y: Self)

law

ensures

x.gt_log(y) == (x.cmp_log(y) == Ordering::Greater)

fn refl(x: Self)

law

ensures

x.cmp_log(x) == Ordering::Equal

fn trans(x: Self, y: Self, z: Self, o: Ordering)

law

requires

x.cmp_log(y) == o

requires

y.cmp_log(z) == o

ensures

x.cmp_log(z) == o

fn antisym1(x: Self, y: Self)

law

requires

x.cmp_log(y) == Ordering::Less

ensures

y.cmp_log(x) == Ordering::Greater

fn antisym2(x: Self, y: Self)

law

requires

x.cmp_log(y) == Ordering::Greater

ensures

y.cmp_log(x) == Ordering::Less

fn eq_cmp(x: Self, y: Self)

law

ensures

(x == y) == (x.cmp_log(y) == Ordering::Equal)

fn le_log(self, o: Self) -> bool

The logical <= operation.

fn lt_log(self, o: Self) -> bool

The logical < operation.

fn ge_log(self, o: Self) -> bool

The logical >= operation.

fn gt_log(self, o: Self) -> bool

The logical > operation.

impl<T> PartialEq for Reverse<T>

where T: PartialEq,

fn eq(&self, other: &Reverse<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T> PartialOrd for Reverse<T>

where T: PartialOrd,

fn partial_cmp(&self, other: &Reverse<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Reverse<T>) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Reverse<T>) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Reverse<T>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Reverse<T>) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T> Copy for Reverse<T>

where T: Copy,

impl<T> Eq for Reverse<T>

where T: Eq,

impl<T> StructuralPartialEq for Reverse<T>