pub enum Entry<'a, K, V> where
K: Ord + Clone,
V: Clone, {
Occupied(OccupiedEntry<'a, K, V>),
Vacant(VacantEntry<'a, K, V>),
}Expand description
A handle for a key and its associated value.
Variants
Occupied(OccupiedEntry<'a, K, V>)
An entry which exists in the map.
Vacant(VacantEntry<'a, K, V>)
An entry which doesn’t exist in the map.
Implementations
sourceimpl<'a, K, V> Entry<'a, K, V> where
K: Ord + Clone,
V: Clone,
impl<'a, K, V> Entry<'a, K, V> where
K: Ord + Clone,
V: Clone,
sourcepub fn or_insert(self, default: V) -> &'a mut V
pub fn or_insert(self, default: V) -> &'a mut V
Insert the default value provided if there was no value already, and return a mutable reference to the value.
sourcepub fn or_insert_with<F>(self, default: F) -> &'a mut V where
F: FnOnce() -> V,
pub fn or_insert_with<F>(self, default: F) -> &'a mut V where
F: FnOnce() -> V,
Insert the default value from the provided function if there was no value already, and return a mutable reference to the value.
sourcepub fn or_default(self) -> &'a mut V where
V: Default,
pub fn or_default(self) -> &'a mut V where
V: Default,
Insert a default value if there was no value already, and return a mutable reference to the value.
sourcepub fn and_modify<F>(self, f: F) -> Self where
F: FnOnce(&mut V),
pub fn and_modify<F>(self, f: F) -> Self where
F: FnOnce(&mut V),
Call the provided function to modify the value if the value exists.
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>
impl<'a, K, V> !Sync for Entry<'a, K, V>
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
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more