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Entry

Enum Entry 

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pub enum Entry<'a, V> {
    Occupied(OccupiedEntry<'a, V>),
    Vacant(VacantEntry<'a, V>),
}
Expand description

A place in the map, whether or not something is there yet.

Returned by OrderedMap::entry.

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Occupied(OccupiedEntry<'a, V>)

The key is present.

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Vacant(VacantEntry<'a, V>)

The key is absent, and the entry owns the key that would go there.

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impl<'a, V> Entry<'a, V>

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pub fn key(&self) -> &str

The key this entry is for.

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

The value, inserting default first if the key was absent.

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pub fn or_insert_with<F: FnOnce() -> V>(self, default: F) -> &'a mut V

The value, inserting what default returns if the key was absent.

default is not called for a key that is already there.

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pub fn and_modify<F: FnOnce(&mut V)>(self, f: F) -> Self

Run f on the value if the key is present, then hand the entry back.

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impl<'a, V: Default> Entry<'a, V>

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pub fn or_default(self) -> &'a mut V

The value, inserting V::default() if the key was absent.

Auto Trait Implementations§

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

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

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impl<'a, V> RefUnwindSafe for Entry<'a, V>

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

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

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

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impl<'a, V> UnsafeUnpin for Entry<'a, V>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.