Struct RwLockMappedWriteGuard 

pub struct RwLockMappedWriteGuard<'a, T: ?Sized> { /* private fields */ }

Exclusive access to a component of a RwLock’s value, made by RwLockWriteGuard::map; releases on drop. The release makes the progress RwLockReadGuard’s does.

Implementations

impl<'a, T: ?Sized> RwLockMappedWriteGuard<'a, T>

pub fn map<F, U>(this: Self, f: F) -> RwLockMappedWriteGuard<'a, U>

where U: ?Sized, F: FnOnce(&mut T) -> &mut U,

A guard for a component of the component. It cannot fail: this guard already holds the write.

An associated function, RwLockMappedWriteGuard::map(guard, f): a method would shadow methods of the locked data.

pub fn try_map<F, U>( this: Self, f: F, ) -> Result<RwLockMappedWriteGuard<'a, U>, Self>

where U: ?Sized, F: FnOnce(&mut T) -> Option<&mut U>,

map that gives the guard back when f finds no component, with the write still held.

Trait Implementations

impl<T: ?Sized + Debug> Debug for RwLockMappedWriteGuard<'_, T>

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

Formats the value using the given formatter.

impl<T: ?Sized> Deref for RwLockMappedWriteGuard<'_, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T: ?Sized> DerefMut for RwLockMappedWriteGuard<'_, T>

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

Mutably dereferences the value.

impl<T: ?Sized + Display> Display for RwLockMappedWriteGuard<'_, T>

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

Formats the value using the given formatter.

impl<T: ?Sized> Drop for RwLockMappedWriteGuard<'_, T>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl<T: ?Sized + Send + Sync> Send for RwLockMappedWriteGuard<'_, T>

impl<T: ?Sized + Send + Sync> Sync for RwLockMappedWriteGuard<'_, T>