Struct MappedMutexGuard
#[must_use = "if unused the Mutex will immediately unlock"]
pub struct MappedMutexGuard<'a, T: ?Sized> { /* private fields */ }A handle to a held Mutex that has had a function applied to it via MutexGuard::map.
This can be used to hold a subfield of the protected data.
Implementations
impl<'a, T: ?Sized> MappedMutexGuard<'a, T>
fn map<U, F>(this: Self, f: F) -> MappedMutexGuard<'a, U> where F: FnOnce(&mut T) -> &mut U,Makes a new
MappedMutexGuardfor a component of the locked data.This operation cannot fail as the
MappedMutexGuardpassed in already locked the mutex.This is an associated function that needs to be used as
MappedMutexGuard::map(...). A method would interfere with methods of the same name on the contents of the locked data.fn try_map<U, F>(this: Self, f: F) -> Result<MappedMutexGuard<'a, U>, Self> where F: FnOnce(&mut T) -> Option<&mut U>,Attempts to make a new
MappedMutexGuardfor a component of the locked data. The original guard is returned if the closure returnsNone.This operation cannot fail as the
MappedMutexGuardpassed in already locked the mutex.This is an associated function that needs to be used as
MappedMutexGuard::try_map(...). A method would interfere with methods of the same name on the contents of the locked data.
Trait Implementations
impl<'a, T> Send for MappedMutexGuard<'a, T>
where
T: ?Sized + Send + 'a,
impl<'a, T> Sync for MappedMutexGuard<'a, T>
where
T: ?Sized + Sync + 'a,
impl<'a, T: ?Sized + Debug> Debug for MappedMutexGuard<'a, T>
fn fmt(&self, f: &mut Formatter<'_>) -> Result
impl<'a, T: ?Sized + Display> Display for MappedMutexGuard<'a, T>
fn fmt(&self, f: &mut Formatter<'_>) -> Result
impl<'a, T: ?Sized> Deref for MappedMutexGuard<'a, T>
type Target = T;fn deref(&self) -> &Self::Target
impl<'a, T: ?Sized> DerefMut for MappedMutexGuard<'a, T>
fn deref_mut(&mut self) -> &mut Self::Target
impl<'a, T: ?Sized> Drop for MappedMutexGuard<'a, T>
fn drop(&mut self)
Auto Trait Implementations
impl<'a, T> !RefUnwindSafe for MappedMutexGuard<'a, T>
impl<'a, T> !UnwindSafe for MappedMutexGuard<'a, T>
impl<'a, T> Freeze for MappedMutexGuard<'a, T>
where
*mut T: Freeze,
PhantomData<&'a mut T>: Freeze,
T: ?Sized,
impl<'a, T> Unpin for MappedMutexGuard<'a, T>
where
*mut T: Unpin,
PhantomData<&'a mut T>: Unpin,
T: ?Sized,
impl<'a, T> UnsafeUnpin for MappedMutexGuard<'a, T>
where
*mut T: UnsafeUnpin,
PhantomData<&'a mut T>: UnsafeUnpin,
T: ?Sized,
Blanket Implementations
impl<P, T> Receiver for MappedMutexGuard<'a, T>
where
P: Deref<Target = T> + ?Sized,
T: ?Sized,
type Target = T;
impl<T> Any for MappedMutexGuard<'a, T>
where
T: 'static + ?Sized,
fn type_id(&self) -> TypeId
impl<T> Borrow<T> for MappedMutexGuard<'a, T>
where
T: ?Sized,
fn borrow(&self) -> &T
impl<T> BorrowMut<T> for MappedMutexGuard<'a, T>
where
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
impl<T> From<T> for MappedMutexGuard<'a, T>
fn from(t: T) -> TReturns the argument unchanged.
impl<T> ToString for MappedMutexGuard<'a, T>
where
T: Display + ?Sized,
fn to_string(&self) -> String
impl<T, U> Into<U> for MappedMutexGuard<'a, T>
where
U: From<T>,
fn into(self) -> UCalls
U::from(self).That is, this conversion is whatever the implementation of
[From]<T> for Uchooses to do.
impl<T, U> TryFrom<U> for MappedMutexGuard<'a, T>
where
U: Into<T>,
type Error = never;fn try_from(value: U) -> Result<T, never>
impl<T, U> TryInto<U> for MappedMutexGuard<'a, T>
where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error;fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>