Enum EvictionPolicy 

pub enum EvictionPolicy {
    None,
    Lru,
    Lfu,
}

缓存驱逐策略

Variants

None

无驱逐策略，无边界缓存（FIFO 行为）

Lru

最近最少使用驱逐策略

Lfu

最不常用驱逐策略

Trait Implementations

impl Clone for EvictionPolicy

fn clone(&self) -> EvictionPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvictionPolicy

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

Formats the value using the given formatter.

impl Default for EvictionPolicy

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for EvictionPolicy

fn eq(&self, other: &EvictionPolicy) -> 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 Copy for EvictionPolicy

impl Eq for EvictionPolicy

impl StructuralPartialEq for EvictionPolicy