Enum Entry

pub enum Entry<'a, K, V> {
    Occupied(OccupiedEntry<'a, K, V>),
    Vacant(VacantEntry<'a, K, V>),
}

Variants

Occupied(OccupiedEntry<'a, K, V>)

Vacant(VacantEntry<'a, K, V>)

Implementations

impl<'a, K: Eq + Hash, V> Entry<'a, K, V>

pub fn and_modify(self, f: impl FnOnce(&mut V)) -> Self

Apply a function to the stored value if it exists.

pub fn key(&self) -> &K

Get the key of the entry.

pub fn into_key(self) -> K

Into the key of the entry.

pub fn or_default(self) -> RefMut<'a, K, V>

where V: Default,

Return a mutable reference to the element if it exists, otherwise insert the default and return a mutable reference to that.

pub fn or_insert(self, value: V) -> RefMut<'a, K, V>

Return a mutable reference to the element if it exists, otherwise a provided value and return a mutable reference to that.

pub fn or_insert_with(self, value: impl FnOnce() -> V) -> RefMut<'a, K, V>

Return a mutable reference to the element if it exists, otherwise insert the result of a provided function and return a mutable reference to that.

pub fn or_try_insert_with<E>( self, value: impl FnOnce() -> Result<V, E>, ) -> Result<RefMut<'a, K, V>, E>

pub fn insert(self, value: V) -> RefMut<'a, K, V>

Sets the value of the entry, and returns a reference to the inserted value.

pub fn insert_entry(self, value: V) -> OccupiedEntry<'a, K, V>

where K: Clone,

Sets the value of the entry, and returns an OccupiedEntry.

If you are not interested in the occupied entry, consider insert as it doesn’t need to clone the key.