Struct weak_table::weak_key_hash_map::VacantEntry

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pub struct VacantEntry<'a, K: 'a + WeakKey, V: 'a>(_);

Expand description

A vacant entry, which can be inserted in or viewed.

Implementations

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impl<'a, K: WeakKey, V> VacantEntry<'a, K, V>

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pub fn key(&self) -> &K::Strong

Gets a reference to the key that would be used when inserting a value through the VacantEntry.

O(1) time

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pub fn into_key(self) -> K::Strong

Returns ownership of the key.

O(1) time

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

Inserts the key and value into the map and return a mutable reference to the value.

expected O(1) time; worst-case O(p) time

Trait Implementations

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impl<'a, K: WeakKey, V: Debug> Debug for VacantEntry<'a, K, V> where
K::Strong: Debug,

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<'a, K, V> RefUnwindSafe for VacantEntry<'a, K, V> where
 K: RefUnwindSafe,
 V: RefUnwindSafe,
 <K as WeakElement>::Strong: RefUnwindSafe,

impl<'a, K, V> Send for VacantEntry<'a, K, V> where
 K: Send,
 V: Send,
 <K as WeakElement>::Strong: Send,

impl<'a, K, V> Sync for VacantEntry<'a, K, V> where
 K: Sync,
 V: Sync,
 <K as WeakElement>::Strong: Sync,

impl<'a, K, V> Unpin for VacantEntry<'a, K, V> where
<K as WeakElement>::Strong: Unpin,

impl<'a, K, V> !UnwindSafe for VacantEntry<'a, K, 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,

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 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 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>::Error>

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct weak_table::weak_key_hash_map::VacantEntry

Implementations

impl<'a, K: WeakKey, V> VacantEntry<'a, K, V>

pub fn key(&self) -> &K::Strong

pub fn into_key(self) -> K::Strong

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

Trait Implementations

impl<'a, K: WeakKey, V: Debug> Debug for VacantEntry<'a, K, V> where
K::Strong: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Auto Trait Implementations

impl<'a, K, V> RefUnwindSafe for VacantEntry<'a, K, V> where
    K: RefUnwindSafe,
    V: RefUnwindSafe,
    <K as WeakElement>::Strong: RefUnwindSafe,

impl<'a, K, V> Send for VacantEntry<'a, K, V> where
    K: Send,
    V: Send,
    <K as WeakElement>::Strong: Send,

impl<'a, K, V> Sync for VacantEntry<'a, K, V> where
    K: Sync,
    V: Sync,
    <K as WeakElement>::Strong: Sync,

impl<'a, K, V> Unpin for VacantEntry<'a, K, V> where
<K as WeakElement>::Strong: Unpin,

impl<'a, K, V> !UnwindSafe for VacantEntry<'a, K, V>

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Error = Infallible

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

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

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

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

Struct weak_table::weak_key_hash_map::VacantEntry

Implementations

impl<'a, K: WeakKey, V> VacantEntry<'a, K, V>

pub fn key(&self) -> &K::Strong

pub fn into_key(self) -> K::Strong

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

Trait Implementations

impl<'a, K: WeakKey, V: Debug> Debug for VacantEntry<'a, K, V> where K::Strong: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Auto Trait Implementations

impl<'a, K, V> RefUnwindSafe for VacantEntry<'a, K, V> where K: RefUnwindSafe, V: RefUnwindSafe, <K as WeakElement>::Strong: RefUnwindSafe,

impl<'a, K, V> Send for VacantEntry<'a, K, V> where K: Send, V: Send, <K as WeakElement>::Strong: Send,

impl<'a, K, V> Sync for VacantEntry<'a, K, V> where K: Sync, V: Sync, <K as WeakElement>::Strong: Sync,

impl<'a, K, V> Unpin for VacantEntry<'a, K, V> where <K as WeakElement>::Strong: Unpin,

impl<'a, K, V> !UnwindSafe for VacantEntry<'a, K, V>

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Error = Infallible

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

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

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

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

impl<'a, K: WeakKey, V: Debug> Debug for VacantEntry<'a, K, V> where
K::Strong: Debug,

impl<'a, K, V> RefUnwindSafe for VacantEntry<'a, K, V> where
K: RefUnwindSafe,
V: RefUnwindSafe,
<K as WeakElement>::Strong: RefUnwindSafe,

impl<'a, K, V> Send for VacantEntry<'a, K, V> where
K: Send,
V: Send,
<K as WeakElement>::Strong: Send,

impl<'a, K, V> Sync for VacantEntry<'a, K, V> where
K: Sync,
V: Sync,
<K as WeakElement>::Strong: Sync,

impl<'a, K, V> Unpin for VacantEntry<'a, K, V> where
<K as WeakElement>::Strong: Unpin,

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

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

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

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