Struct WriteGuardEntry 

pub struct WriteGuardEntry<'a, V> { /* private fields */ }

Guardian for methods like get_or_insert, holding HashMap write lock and value write lock 用于 get_or_insert 等方法的守护者，持有HashMap写锁和值的写锁

Requires HashMap write lock because it may involve insertion operations 因为可能涉及插入操作，需要HashMap写锁

Trait Implementations

impl<'a, V> AsMut<V> for WriteGuardEntry<'a, V>

fn as_mut(&mut self) -> &mut V

Converts this type into a mutable reference of the (usually inferred) input type.

impl<'a, V> AsRef<V> for WriteGuardEntry<'a, V>

fn as_ref(&self) -> &V

Converts this type into a shared reference of the (usually inferred) input type.

impl<'a, V> Debug for WriteGuardEntry<'a, V>

where V: Debug,

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

Formats the value using the given formatter.

impl<'a, V> Deref for WriteGuardEntry<'a, V>

type Target = V

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, V> DerefMut for WriteGuardEntry<'a, V>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<'a, V> Display for WriteGuardEntry<'a, V>

where V: Display,

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

Formats the value using the given formatter.