pub struct MappedRwLockReadGuard<'a, T>where
T: 'a + ?Sized,{ /* private fields */ }mapped_lock_guards)std only.Expand description
RAII structure used to release the shared read access of a lock when dropped, which can point to a subfield of the protected data.
This structure is created by the map and filter_map methods
on RwLockReadGuard.
Implementations§
Source§impl<'a, T> MappedRwLockReadGuard<'a, T>where
T: ?Sized,
impl<'a, T> MappedRwLockReadGuard<'a, T>where
T: ?Sized,
Sourcepub fn map<U, F>(
orig: MappedRwLockReadGuard<'a, T>,
f: F,
) -> MappedRwLockReadGuard<'a, U>
🔬This is a nightly-only experimental API. (mapped_lock_guards)
pub fn map<U, F>( orig: MappedRwLockReadGuard<'a, T>, f: F, ) -> MappedRwLockReadGuard<'a, U>
mapped_lock_guards)Makes a MappedRwLockReadGuard for a component of the borrowed data,
e.g. an enum variant.
The RwLock is already locked for reading, so this cannot fail.
This is an associated function that needs to be used as
MappedRwLockReadGuard::map(...). A method would interfere with
methods of the same name on the contents of the MappedRwLockReadGuard
used through Deref.
§Panics
If the closure panics, the guard will be dropped (unlocked) and the RwLock will not be poisoned.
Sourcepub fn filter_map<U, F>(
orig: MappedRwLockReadGuard<'a, T>,
f: F,
) -> Result<MappedRwLockReadGuard<'a, U>, MappedRwLockReadGuard<'a, T>> ⓘ
🔬This is a nightly-only experimental API. (mapped_lock_guards)
pub fn filter_map<U, F>( orig: MappedRwLockReadGuard<'a, T>, f: F, ) -> Result<MappedRwLockReadGuard<'a, U>, MappedRwLockReadGuard<'a, T>> ⓘ
mapped_lock_guards)Makes a MappedRwLockReadGuard for a component of the borrowed data.
The original guard is returned as an Err(...) if the closure returns
None.
The RwLock is already locked for reading, so this cannot fail.
This is an associated function that needs to be used as
MappedRwLockReadGuard::filter_map(...). A method would interfere with
methods of the same name on the contents of the MappedRwLockReadGuard
used through Deref.
§Panics
If the closure panics, the guard will be dropped (unlocked) and the RwLock will not be poisoned.
Trait Implementations§
Source§impl<T> Debug for MappedRwLockReadGuard<'_, T>
impl<T> Debug for MappedRwLockReadGuard<'_, T>
Source§impl<T> Deref for MappedRwLockReadGuard<'_, T>where
T: ?Sized,
impl<T> Deref for MappedRwLockReadGuard<'_, T>where
T: ?Sized,
Source§impl<T> Display for MappedRwLockReadGuard<'_, T>
impl<T> Display for MappedRwLockReadGuard<'_, T>
Source§impl<T> Drop for MappedRwLockReadGuard<'_, T>where
T: ?Sized,
impl<T> Drop for MappedRwLockReadGuard<'_, T>where
T: ?Sized,
impl<T> !Send for MappedRwLockReadGuard<'_, T>where
T: ?Sized,
impl<T> Sync for MappedRwLockReadGuard<'_, T>
Auto Trait Implementations§
impl<'a, T> Freeze for MappedRwLockReadGuard<'a, T>where
T: ?Sized,
impl<'a, T> RefUnwindSafe for MappedRwLockReadGuard<'a, T>where
T: RefUnwindSafe + ?Sized,
impl<'a, T> Unpin for MappedRwLockReadGuard<'a, T>where
T: ?Sized,
impl<'a, T> UnwindSafe for MappedRwLockReadGuard<'a, T>where
T: RefUnwindSafe + ?Sized,
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> ByteSized for T
impl<T> ByteSized for T
Source§const BYTE_ALIGN: usize = _
const BYTE_ALIGN: usize = _
Source§fn byte_align(&self) -> usize
fn byte_align(&self) -> usize
Source§fn ptr_size_ratio(&self) -> [usize; 2]
fn ptr_size_ratio(&self) -> [usize; 2]
Source§impl<T, R> Chain<R> for Twhere
T: ?Sized,
impl<T, R> Chain<R> for Twhere
T: ?Sized,
Source§impl<T> ExtAny for T
impl<T> ExtAny for T
Source§fn type_hash_with<H: Hasher>(&self, hasher: H) -> u64
fn type_hash_with<H: Hasher>(&self, hasher: H) -> u64
TypeId of Self using a custom hasher.Source§fn as_any_mut(&mut self) -> &mut dyn Anywhere
Self: Sized,
fn as_any_mut(&mut self) -> &mut dyn Anywhere
Self: Sized,
Source§impl<T> ExtMem for Twhere
T: ?Sized,
impl<T> ExtMem for Twhere
T: ?Sized,
Source§const NEEDS_DROP: bool = _
const NEEDS_DROP: bool = _
Source§fn mem_align_of<T>() -> usize
fn mem_align_of<T>() -> usize
Source§fn mem_align_of_val(&self) -> usize
fn mem_align_of_val(&self) -> usize
Source§fn mem_size_of<T>() -> usize
fn mem_size_of<T>() -> usize
Source§fn mem_size_of_val(&self) -> usize
fn mem_size_of_val(&self) -> usize
Source§fn mem_needs_drop(&self) -> bool
fn mem_needs_drop(&self) -> bool
true if dropping values of this type matters. Read moreSource§fn mem_forget(self)where
Self: Sized,
fn mem_forget(self)where
Self: Sized,
self without running its destructor. Read moreSource§fn mem_replace(&mut self, other: Self) -> Selfwhere
Self: Sized,
fn mem_replace(&mut self, other: Self) -> Selfwhere
Self: Sized,
Source§unsafe fn mem_zeroed<T>() -> T
unsafe fn mem_zeroed<T>() -> T
unsafe_layout only.T represented by the all-zero byte-pattern. Read moreSource§unsafe fn mem_transmute_copy<Src, Dst>(src: &Src) -> Dst
unsafe fn mem_transmute_copy<Src, Dst>(src: &Src) -> Dst
unsafe_layout only.T represented by the all-zero byte-pattern. Read moreSource§fn mem_as_bytes(&self) -> &[u8] ⓘ
fn mem_as_bytes(&self) -> &[u8] ⓘ
unsafe_slice only.§impl<S> FromSample<S> for S
impl<S> FromSample<S> for S
fn from_sample_(s: S) -> S
Source§impl<T> Hook for T
impl<T> Hook for T
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more