# Struct linked_hash_map::VacantEntry

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    pub struct VacantEntry<'a, K: 'a, V: 'a, S: 'a = RandomState> { /* private fields */ }

Expand description

A view into a single empty location in a `LinkedHashMap`.

## Implementations

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### impl<'a, K: 'a + Hash + Eq, V: 'a, S: BuildHasher> VacantEntry<'a, K, V, S>

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#### pub fn key(&self) -> &K

Gets a reference to the entry key

##### Examples

    use linked_hash_map::LinkedHashMap;

    let mut map = LinkedHashMap::<String, u32>::new();

    assert_eq!("foo", map.entry("foo".to_string()).key());

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#### pub fn insert(self, value: V) -> &'a mut V

Sets the value of the entry with the VacantEntry’s key, and returns a mutable reference to it

## Auto Trait Implementations

### impl<'a, K, V, S> RefUnwindSafe for VacantEntry<'a, K, V, S> where
K: RefUnwindSafe,
S: RefUnwindSafe,
V: RefUnwindSafe,

### impl<'a, K, V, S> Send for VacantEntry<'a, K, V, S> where
K: Send,
S: Send,
V: Send,

### impl<'a, K, V, S> Sync for VacantEntry<'a, K, V, S> where
K: Sync,
S: Sync,
V: Sync,

### impl<'a, K, V, S> Unpin for VacantEntry<'a, K, V, S> where
K: Unpin,

### impl<'a, K, V, S = RandomState> !UnwindSafe for VacantEntry<'a, K, V, S>

## 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,

const: unstable · source

#### 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,

const: unstable · source

#### 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

const: unstable · source

#### fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

#### 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>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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### impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

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

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.