Struct RefcountedMap 

pub struct RefcountedMap<K: Eq + Hash + Clone, V: Clone> { /* private fields */ }

A map where values are reference counted; removing all refs drops the value.

Implementations

impl<K: Eq + Hash + Clone, V: Clone> RefcountedMap<K, V>

pub fn new() -> Self

Create an empty map.

pub fn insert(&mut self, key: K, value: V)

Insert a value with refcount 1.

pub fn inc_ref(&mut self, key: &K)

Increment the refcount of a key.

pub fn dec_ref(&mut self, key: &K) -> bool

Decrement the refcount. Returns true if the value was dropped.

pub fn get(&self, key: &K) -> Option<&V>

Get a reference to the value.

pub fn refcount(&self, key: &K) -> u32

Get the refcount of a key.

pub fn len(&self) -> usize

Number of live entries.

pub fn is_empty(&self) -> bool

Whether the map is empty.

Trait Implementations

impl<K: Eq + Hash + Clone, V: Clone> Default for RefcountedMap<K, V>

fn default() -> Self

Returns the “default value” for a type.