pub struct TaskLocalFuture<T, F> where
T: 'static, { /* private fields */ }Available on crate feature
rt only.Expand description
A future that sets a value T of a task local for the future F during
its execution.
The value of the task-local must be 'static and will be dropped on the
completion of the future.
Created by the function LocalKey::scope.
Examples
tokio::task_local! {
static NUMBER: u32;
}
NUMBER.scope(1, async move {
println!("task local value: {}", NUMBER.get());
}).await;Trait Implementations
sourceimpl<T: 'static, F: Future> Future for TaskLocalFuture<T, F>
impl<T: 'static, F: Future> Future for TaskLocalFuture<T, F>
impl<'__pin, T, F> Unpin for TaskLocalFuture<T, F> where
__Origin<'__pin, T, F>: Unpin,
T: 'static,
Auto Trait Implementations
impl<T, F> RefUnwindSafe for TaskLocalFuture<T, F> where
F: RefUnwindSafe,
T: RefUnwindSafe,
impl<T, F> Send for TaskLocalFuture<T, F> where
F: Send,
T: Send,
impl<T, F> Sync for TaskLocalFuture<T, F> where
F: Sync,
T: Sync,
impl<T, F> UnwindSafe for TaskLocalFuture<T, F> where
F: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
sourcefn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
sourceimpl<F> IntoFuture for F where
F: Future,
impl<F> IntoFuture for F where
F: Future,
type Output = <F as Future>::Output
type Output = <F as Future>::Output
🔬 This is a nightly-only experimental API. (
into_future)The output that the future will produce on completion.
type IntoFuture = F
type IntoFuture = F
🔬 This is a nightly-only experimental API. (
into_future)Which kind of future are we turning this into?
sourcefn into_future(self) -> <F as IntoFuture>::IntoFuture
fn into_future(self) -> <F as IntoFuture>::IntoFuture
🔬 This is a nightly-only experimental API. (
into_future)Creates a future from a value.
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output; where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output; where
S: Into<Dispatch>,
T: Future, type Output = <T as Future>::Output;
Attaches the provided Subscriber to this type, returning a
WithDispatch wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
fn with_current_subscriber(self) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
Attaches the current default Subscriber to this type, returning a
WithDispatch wrapper. Read more