Struct arc_swap::access::Constant

pub struct Constant<T>(pub T);

Access to an constant.

This wraps a constant value to provide [Access] to it. It is constant in the sense that, unlike [ArcSwapAny] and [Map], the loaded value will always stay the same (there's no remote store).

The purpose is mostly testing and plugging a parameter that works generically from code that doesn't need the updating functionality.

Trait Implementations

impl<T: Clone> Access<T> for Constant<T>

type Guard = ConstantDeref<T>

A guard object containing the value and keeping it alive.

fn load(&self) -> Self::Guard

The loading method.

impl<T: Clone> Clone for Constant<T>

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

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Copy> Copy for Constant<T>

impl<T: Debug> Debug for Constant<T>

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

Formats the value using the given formatter.

impl<T: Eq> Eq for Constant<T>

impl<T: Hash> Hash for Constant<T>

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].

impl<T: Ord> Ord for Constant<T>

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

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl<T: PartialEq> PartialEq<Constant<T>> for Constant<T>

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

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

fn ne(&self, other: &Constant<T>) -> bool

This method tests for !=.

impl<T: PartialOrd> PartialOrd<Constant<T>> for Constant<T>

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

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

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

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

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

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

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

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

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

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

impl<T> StructuralEq for Constant<T>

impl<T> StructuralPartialEq for Constant<T>