Enum Entry 

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

A view into a single key-value pair of a map. Generated by the entry method.

Variants

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

The given key was already in the map.

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

The given key was not in the map.

Implementations

impl<'a, K, V> Entry<'a, K, V>

pub fn or_insert(self, default: V) -> &'a mut V

Insert a value under the entry’s key if the entry is vacant.

pub fn or_insert_with<F: FnOnce() -> V>(self, default: F) -> &'a mut V

Like or_insert, but takes a closure that is only called if the entry is vacant.

pub fn or_insert_with_key<F: FnOnce(&K) -> V>(self, default: F) -> &'a mut V

Like or_insert_with, but the closure takes the entry’s key as an argument.

pub fn key(&self) -> &K

Get a reference to the entry’s key.

pub fn and_modify<F>(self, f: F) -> Self

where F: FnOnce(&mut V),

Modify the entry’s value if the entry is occupied.

impl<'a, K, V: Default> Entry<'a, K, V>

pub fn or_default(self) -> &'a mut V

Insert the default value under the entry’s key if the key is vacant.

Trait Implementations

impl<'a, K: Debug, V: Debug> Debug for Entry<'a, K, V>

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

Formats the value using the given formatter.