Enum Entry

pub enum Entry<'a, K, V>

A view into a single entry in a map, which may either be vacant or occupied. This enum is constructed from the entry method on Map.

Variants

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

A vacant Entry.

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

An occupied Entry.

Implementations

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

fn key(&self) -> &K

Returns a reference to this entry's key.

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

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

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 default function if empty, and returns a mutable reference to the value in the entry.

Auto Trait Implementations

impl<'a, K, V> !UnwindSafe for Entry<'a, K, V>

impl<'a, K, V> Freeze for Entry<'a, K, V> where VacantEntry<'a, K, V>: Freeze, OccupiedEntry<'a, K, V>: Freeze,

impl<'a, K, V> RefUnwindSafe for Entry<'a, K, V> where VacantEntry<'a, K, V>: RefUnwindSafe, OccupiedEntry<'a, K, V>: RefUnwindSafe,

impl<'a, K, V> Send for Entry<'a, K, V> where VacantEntry<'a, K, V>: Send, OccupiedEntry<'a, K, V>: Send,

impl<'a, K, V> Sync for Entry<'a, K, V> where VacantEntry<'a, K, V>: Sync, OccupiedEntry<'a, K, V>: Sync,

impl<'a, K, V> Unpin for Entry<'a, K, V> where VacantEntry<'a, K, V>: Unpin, OccupiedEntry<'a, K, V>: Unpin,

impl<'a, K, V> UnsafeUnpin for Entry<'a, K, V> where VacantEntry<'a, K, V>: UnsafeUnpin, OccupiedEntry<'a, K, V>: UnsafeUnpin,

Blanket Implementations

impl<T> Any for Entry<'a, K, V> where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Entry<'a, K, V> where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Entry<'a, K, V> where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for Entry<'a, K, V>

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for Entry<'a, K, V> where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

impl<T, U> TryFrom<U> for Entry<'a, K, V> where U: Into<T>,

type Error = never;
fn try_from(value: U) -> Result<T, never>

impl<T, U> TryInto<U> for Entry<'a, K, V> where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error;
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>