Enum Cache

pub enum Cache<T> {
    NotFound,
    Found(T),
}

When dealing with caches, fetch values are the most common operation. This enum represents the result of a fetch operation, and can be used to determine if you’ve got a cache miss or not. It works a lot like the Option enum, but with a bit more context.

Variants

NotFound

The value was not found in the cache; cache miss.

Found(T)

The value was found in the cache; cache hit.

Trait Implementations

impl<T: Clone> Clone for Cache<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Cache<T>

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

Formats the value using the given formatter.

impl<T> Default for Cache<T>

fn default() -> Cache<T>

Returns the “default value” for a type.

impl<T> From<Option<T>> for Cache<T>

fn from(option: Option<T>) -> Self

Converts to this type from the input type.

impl<T: PartialEq> PartialEq for Cache<T>

fn eq(&self, other: &Cache<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<T: Eq> Eq for Cache<T>

impl<T> StructuralPartialEq for Cache<T>