# Enum indexmap::map::Entry [−] [src]

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

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>` [src]

#### `pub fn or_insert(self, default: V) -> &'a mut V` [src]

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,` [src]

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,` [src]

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` [src]

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` [src]

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),` [src]

Modifies the entry if it is occupied.

#### `pub fn or_default(self) -> &'a mut V where
V: Default,` [src]

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

### `impl<K: Debug, V: Debug> Debug for Entry<'_, K, V>` [src]

#### `fn fmt(&self, f: &mut Formatter<'_>) -> Result` [src]

Formats the value using the given formatter. Read more

## 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,
V: Send,`

### `impl<'a, K, V> Sync for Entry<'a, K, V> where
K: Sync,
V: 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

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T` [src]

#### `pub fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U` [src]

Performs the conversion.

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `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>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

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

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>` [src]

Performs the conversion.