Struct SmartEntry

pub struct SmartEntry<'a, K, V> { /* private fields */ }

An entry in the cache that can be used for for reading or writing, only updating the LRU order when the value is accessed mutably.

The Deref and DerefMut implementations allow for easy access to the value, without or with updating the LRU order, respectively. Accessing the value mutably via DerefMut will update the LRU order.

See SmartEntry::peek and SmartEntry::get for more information.

Implementations

impl<K, V> SmartEntry<'_, K, V>

pub fn key(&self) -> &K

Access the key only, without updating the LRU order.

pub fn peek(&self) -> (&K, &V)

Access the key-value pair, without updating the LRU order.

The Deref implementation invokes this method to access the value.

pub fn get(&mut self) -> (&K, &mut V)

Access the key-value pair, and update the LRU order.

The LRU order is updated every time this method is called, as it is assumed that the caller is actively using the value.

The DerefMut implementation invokes this method to access the value, updating the LRU order in the process.

Trait Implementations

impl<K, V> Deref for SmartEntry<'_, K, V>

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

Dereferences the value, without updating the LRU order.

type Target = V

The resulting type after dereferencing.

impl<K, V> DerefMut for SmartEntry<'_, K, V>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value, and updates the LRU order.