Struct Values 

pub struct Values(/* private fields */);

Cache that can store any value.

It uses a key type to identify the value inserted to the cache. The key type needs to implement ValueKey.

Implementations

impl Values

pub fn new() -> Self

Create a new empty Values instance.

pub fn set<K>(&mut self, value: K::Type)

where K: ValueKey,

Set a value for the specified key K.

pub fn get<K>(&self) -> K::Type

where K: ValueKey, K::Type: Clone,

Get the value that was stored for the specified key K.

Panics if the key was not set before.

pub fn get_ref<K>(&self) -> &K::Type

where K: ValueKey,

Get a reference to the value that was stored for the specified key K.

Panics if the key was not set before.

pub fn get_mut<K>(&mut self) -> &mut K::Type

where K: ValueKey,

Get a mutable reference to the value that was stored for the specified key K.

Panics if the key was not set before.

pub fn get_or_create<K>(&mut self) -> &mut K::Type

where K: ValueKey, K::Type: Default,

Get a mutable reference to the value that was stored for the specified key K. If no value is available a new one is created.

pub fn get_or_create_with<K, F>(&mut self, f: F) -> &mut K::Type

where K: ValueKey, F: FnOnce() -> K::Type,

Get a mutable reference to the value that was stored for the specified key K. If no value is available a new one is created with the provided function f.

pub fn extract<K>(&mut self) -> K::Type

where K: ValueKey,

Extracts the value stored for the specified key K.

Panics if the key was not set before.

pub fn unset<K>(&mut self)

where K: ValueKey,

Removes any values for the specified key K.

Trait Implementations

impl Debug for Values

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

Formats the value using the given formatter.

impl Default for Values

fn default() -> Values

Returns the “default value” for a type.