Enum Entry

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

A view into a single entry in a IntMap, which may either be vacant or occupied.

The entry can be constructed by calling IntMap::entry with a key. It allows inspection and in-place manipulation of its value without repeated lookups.

Variants

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

The entry is occupied.

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

The entry is vacant.

Implementations

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

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

Ensures a value is in the entry by inserting the provided value if empty, and returns a mutable reference to the value in the entry.

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

where F: FnOnce() -> V,

Ensures a value is in the entry by inserting the result of the provided function if empty, and returns a mutable reference to the value in the entry.

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

where F: FnOnce(K) -> V,

Ensures a value is in the entry by inserting, if empty, the result of the provided function.

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

where V: Default,

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

Ensures a value is in the entry by inserting the default value if empty, and returns a mutable reference to the value in the entry.