Enum CachedValue 

pub enum CachedValue<'a, T> {
    Ext(&'a T),
    New(&'a T),
    Old(&'a T),
}

A reference provided by the cache

The variants are used to reflect the state of the cache when it has been obtained. All variants carry a reference to the same type of object, available through Deref.

Variants

Ext(&'a T)

The reference has been forwarded from another owner

New(&'a T)

The reference has just been added to the cache

Old(&'a T)

The reference was already in the cache

Implementations

impl<T> CachedValue<'_, T>

pub const fn is_ext(&self) -> bool

pub const fn is_new(&self) -> bool

pub const fn is_old(&self) -> bool

Trait Implementations

impl<'a, T: Clone> Clone for CachedValue<'a, T>

fn clone(&self) -> CachedValue<'a, T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, T: Debug> Debug for CachedValue<'a, T>

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

Formats the value using the given formatter.

impl<'a, T> Deref for CachedValue<'a, T>

type Target = &'a T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, T: PartialEq> PartialEq for CachedValue<'a, T>

fn eq(&self, other: &CachedValue<'a, T>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl<'a, T: Copy> Copy for CachedValue<'a, T>

impl<'a, T: Eq> Eq for CachedValue<'a, T>

impl<'a, T> StructuralPartialEq for CachedValue<'a, T>