Enum indexmap::map::Entry [−][src]
Entry for an existing key-value pair or a vacant location to insert one.
Variants
Occupied(OccupiedEntry<'a, K, V>)
Existing slot with equivalent key.
Vacant(VacantEntry<'a, K, V>)
Vacant slot (no equivalent key in the map).
Implementations
impl<'a, K, V> Entry<'a, K, V>
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pub fn or_insert(self, default: V) -> &'a mut V
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Inserts the given default value in the entry if it is vacant and returns a mutable reference to it. Otherwise a mutable reference to an already existent value is returned.
Computes in O(1) time (amortized average).
pub fn or_insert_with<F>(self, call: F) -> &'a mut V where
F: FnOnce() -> V,
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F: FnOnce() -> V,
Inserts the result of the call
function in the entry if it is vacant and returns a mutable
reference to it. Otherwise a mutable reference to an already existent value is returned.
Computes in O(1) time (amortized average).
pub fn or_insert_with_key<F>(self, call: F) -> &'a mut V where
F: FnOnce(&K) -> V,
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F: FnOnce(&K) -> V,
Inserts the result of the call
function with a reference to the entry’s key if it is
vacant, and returns a mutable reference to the new value. Otherwise a mutable reference to
an already existent value is returned.
Computes in O(1) time (amortized average).
pub fn key(&self) -> &K
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Gets a reference to the entry’s key, either within the map if occupied, or else the new key that was used to find the entry.
pub fn index(&self) -> usize
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Return the index where the key-value pair exists or will be inserted.
pub fn and_modify<F>(self, f: F) -> Self where
F: FnOnce(&mut V),
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F: FnOnce(&mut V),
Modifies the entry if it is occupied.
pub fn or_default(self) -> &'a mut V where
V: Default,
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V: Default,
Inserts a default-constructed value in the entry if it is vacant and returns a mutable reference to it. Otherwise a mutable reference to an already existent value is returned.
Computes in O(1) time (amortized average).
Trait Implementations
Auto Trait Implementations
impl<'a, K, V> RefUnwindSafe for Entry<'a, K, V> where
K: RefUnwindSafe,
V: RefUnwindSafe,
K: RefUnwindSafe,
V: RefUnwindSafe,
impl<'a, K, V> Send for Entry<'a, K, V> where
K: Send,
V: Send,
K: Send,
V: Send,
impl<'a, K, V> Sync for Entry<'a, K, V> where
K: Sync,
V: Sync,
K: Sync,
V: Sync,
impl<'a, K, V> Unpin for Entry<'a, K, V> where
K: Unpin,
K: Unpin,
impl<'a, K, V> !UnwindSafe for Entry<'a, K, V>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,