Trait Cache 

pub trait Cache<K, V, S, M>
where
    K: Eq + Hash,
    S: BuildHasher,
    M: Meter<K, V>,
{
    // Required methods
    fn with_meter_and_hasher(cap: u64, meter: M, hash_builder: S) -> Self;
    fn get<'a, Q>(&'a mut self, k: &Q) -> Option<&'a V>
       where K: Borrow<Q>,
             Q: Hash + Eq + ?Sized;
    fn get_mut<'a, Q>(&'a mut self, k: &Q) -> Option<&'a mut V>
       where K: Borrow<Q>,
             Q: Hash + Eq + ?Sized;
    fn peek<'a, Q>(&'a self, k: &Q) -> Option<&'a V>
       where K: Borrow<Q>,
             Q: Hash + Eq + ?Sized;
    fn peek_mut<'a, Q>(&'a mut self, k: &Q) -> Option<&'a mut V>
       where K: Borrow<Q>,
             Q: Hash + Eq + ?Sized;
    fn peek_by_policy(&self) -> Option<(&K, &V)>;
    fn put(&mut self, k: K, v: V) -> Option<V>;
    fn pop<Q>(&mut self, k: &Q) -> Option<V>
       where K: Borrow<Q>,
             Q: Hash + Eq + ?Sized;
    fn pop_by_policy(&mut self) -> Option<(K, V)>;
    fn contains<Q>(&self, k: &Q) -> bool
       where K: Borrow<Q>,
             Q: Hash + Eq + ?Sized;
    fn len(&self) -> usize;
    fn is_empty(&self) -> bool;
    fn capacity(&self) -> u64;
    fn set_capacity(&mut self, cap: u64);
    fn size(&self) -> u64;
    fn clear(&mut self);
}

A trait for a cache.

Required Methods

fn with_meter_and_hasher(cap: u64, meter: M, hash_builder: S) -> Self

fn get<'a, Q>(&'a mut self, k: &Q) -> Option<&'a V>

where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

fn get_mut<'a, Q>(&'a mut self, k: &Q) -> Option<&'a mut V>

where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

fn peek<'a, Q>(&'a self, k: &Q) -> Option<&'a V>

where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

fn peek_mut<'a, Q>(&'a mut self, k: &Q) -> Option<&'a mut V>

where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

fn peek_by_policy(&self) -> Option<(&K, &V)>

fn put(&mut self, k: K, v: V) -> Option<V>

fn pop<Q>(&mut self, k: &Q) -> Option<V>

where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

fn pop_by_policy(&mut self) -> Option<(K, V)>

fn contains<Q>(&self, k: &Q) -> bool

where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

fn len(&self) -> usize

fn is_empty(&self) -> bool

fn capacity(&self) -> u64

fn set_capacity(&mut self, cap: u64)

fn size(&self) -> u64

fn clear(&mut self)

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<K: Eq + Hash, V, S: BuildHasher, M: CountableMeter<K, V>> Cache<K, V, S, M> for LruCache<K, V, S, M>