Enum Entry

pub enum Entry<'a, T, Extractor, K, S = DefaultHashBuilder> {
    Vacant(VacantEntry<'a, T, Extractor, K, S>),
    OccupiedEntry(&'a mut T),
}

An entry into a KeyedSet, allowing in-place modification of the value associated with the key if it exists.

Variants

Vacant(VacantEntry<'a, T, Extractor, K, S>)

The key was not yet present in the KeyedSet.

OccupiedEntry(&'a mut T)

The key was already present in the KeyedSet.

Implementations

impl<'a, T: 'a, Extractor, S, K> Entry<'a, T, Extractor, K, S>

where S: BuildHasher, for<'z> Extractor: KeyExtractor<'z, T>, for<'z, 'b> <Extractor as KeyExtractor<'z, T>>::Key: PartialEq<<Extractor as KeyExtractor<'b, T>>::Key>,

pub fn get_or_insert_with(self, f: impl FnOnce(K) -> T) -> &'a mut T

Get a mutable reference to the value if present, or assign a value constructed by f if it wasn’t.

pub fn get_or_insert_with_into(self) -> &'a mut T

where K: Into<T>,

A shortcut for entry.get_or_insert_with(Into::into)