Struct RwLockReadGuard 

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

RAII structure used to release the shared read access of a lock when dropped.

This structure is created by the read method on RwLock.

Implementations

impl<'a, T> RwLockReadGuard<'a, T>

where T: ?Sized,

pub fn map<U, F>(this: RwLockReadGuard<'a, T>, f: F) -> RwLockReadGuard<'a, U>

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

Makes a new RwLockReadGuard for a component of the locked data.

This operation cannot fail as data is already locked.

This is an associated function that needs to be used as RwLockReadGuard::map(...). A method would interfere with methods of the same name on the contents of the underlying data used through Deref.

pub fn filter_map<U, F>( this: RwLockReadGuard<'a, T>, f: F, ) -> Result<RwLockReadGuard<'a, U>, RwLockReadGuard<'a, T>>

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

Tries to make a new RwLockReadGuard for a component of the locked data. Returns the original read guard if the closure returns None.

This operation cannot fail as data is already locked.

This is an associated function that needs to be used as RwLockReadGuard::filter_map(...). A method would interfere with methods of the same name on the contents of the underlying data used through Deref.

This function is not available before Rust 1.63.

Trait Implementations

impl<'a, T> Debug for RwLockReadGuard<'a, T>

where T: Debug + ?Sized,

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

Formats the value using the given formatter.

impl<T> Deref for RwLockReadGuard<'_, T>

where T: ?Sized,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &<RwLockReadGuard<'_, T> as Deref>::Target

Dereferences the value.