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§
source§impl<'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 Vwhere
F: FnOnce() -> V,
pub fn or_insert_with<F>(self, default: F) -> &'a mut Vwhere 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 Vwhere
V: Default,
pub fn or_default(self) -> &'a mut Vwhere 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) -> Entry<'a, K, V>where
F: FnOnce(&mut V),
pub fn and_modify<F>(self, f: F) -> Entry<'a, K, V>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>where K: Send + Sync, V: Send + Sync,
impl<'a, K, V> Sync for Entry<'a, K, V>where K: Send + Sync, V: Send + 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> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
source§fn in_current_span(self) -> Instrumented<Self> ⓘ
fn in_current_span(self) -> Instrumented<Self> ⓘ
§impl<T> RoundFrom<T> for T
impl<T> RoundFrom<T> for T
§fn round_from(x: T) -> T
fn round_from(x: T) -> T
Performs the conversion.
§impl<T, U> RoundInto<U> for Twhere
U: RoundFrom<T>,
impl<T, U> RoundInto<U> for Twhere U: RoundFrom<T>,
§fn round_into(self) -> U
fn round_into(self) -> U
Performs the conversion.