pub enum Entry<'a, K, V> {
Vacant(VacantEntry<'a, K, V>),
Occupied(OccupiedEntry<'a, K, V>),
}
Expand description
Represents a space in a Map
that may or may not contains a value.
Variants§
Vacant(VacantEntry<'a, K, V>)
This entry slot does not yet contain a value
Occupied(OccupiedEntry<'a, K, V>)
This entry slot does contain a value
Implementations§
source§impl<'a, K, V> Entry<'a, K, V>where
K: Collapse,
impl<'a, K, V> Entry<'a, K, V>where K: Collapse,
sourcepub fn and_modify<F: FnOnce(&mut V)>(self, f: F) -> Entry<'a, K, V>
pub fn and_modify<F: FnOnce(&mut V)>(self, f: F) -> Entry<'a, K, V>
Run this closure on a mutable reference to the internal value if it is present, otherwise do nothing.
sourcepub fn or_insert_with<F: FnOnce() -> V>(self, with: F) -> &'a mut V
pub fn or_insert_with<F: FnOnce() -> V>(self, with: F) -> &'a mut V
Insert into the entry if it is empty the value returned by the closure and return a mutable reference to the new value, otherwise return a mutable reference to the already present value.
Trait Implementations§
Auto Trait Implementations§
impl<'a, K, V> RefUnwindSafe for Entry<'a, K, V>where K: RefUnwindSafe, V: RefUnwindSafe,
impl<'a, K, V> Send for Entry<'a, K, V>where K: Send, V: Send,
impl<'a, K, V> Sync for Entry<'a, K, V>where K: Sync, V: Sync,
impl<'a, K, V> Unpin for Entry<'a, K, V>where K: Unpin,
impl<'a, K, V> !UnwindSafe for Entry<'a, K, V>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more