# Struct alloc::collections::btree_map::OccupiedError
[−][src]

    pub struct OccupiedError<'a, K: 'a, V: 'a> {
        pub entry: OccupiedEntry<'a, K, V>,
        pub value: V,
    }

🔬 This is a nightly-only experimental API. (`map_try_insert` #82766)

The error returned by `try_insert` when the key already exists.

Contains the occupied entry, and the value that was not inserted.

## Fields

`entry: OccupiedEntry<'a, K, V>`
🔬 This is a nightly-only experimental API. (`map_try_insert` #82766)

The entry in the map that was already occupied.

`value: V`
🔬 This is a nightly-only experimental API. (`map_try_insert` #82766)

The value which was not inserted, because the entry was already occupied.

## Trait Implementations

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

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

Formats the value using the given formatter. Read more

### `impl<'a, K: Debug + Ord, V: Debug> Display for OccupiedError<'a, 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> Send for OccupiedError<'a, K, V> where
K: Send,
V: Send,`

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

### `impl<'a, K, V> Unpin for OccupiedError<'a, K, V> where
V: Unpin,`

## 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> ToString for T where
T: Display + ?Sized,` [src]

#### `pub default fn to_string(&Self) -> String`[src]

Converts the given value to a `String`. Read more

### `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.