Enum async_local::WithLocal

pub enum WithLocal<T, F, R>where
    T: AsContext + 'static,
    F: for<'a> FnOnce(RefGuard<'a, T::Target>) -> Pin<Box<dyn Future<Output = R> + Send + 'a>>,{
    Uninitialized {
        f: F,
        key: &'static LocalKey<T>,
    },
    Initializing {
        _marker: PhantomData<R>,
    },
    Pending(Pin<Box<dyn Future<Output = R> + Send>>),
}

A Future with a reference to a thread local Context that’s usable across await points

Variants

Uninitialized

Fields

f: F

key: &'static LocalKey<T>

Initializing

Fields

_marker: PhantomData<R>

Pending(Pin<Box<dyn Future<Output = R> + Send>>)

Trait Implementations

impl<T, F, R> Future for WithLocal<T, F, R>where T: AsContext, F: for<'a> FnOnce(RefGuard<'a, T::Target>) -> Pin<Box<dyn Future<Output = R> + Send + 'a>>,

type Output = R

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.

impl<'pin, T, F, R> Unpin for WithLocal<T, F, R>where T: AsContext + 'static, F: for<'a> FnOnce(RefGuard<'a, T::Target>) -> Pin<Box<dyn Future<Output = R> + Send + 'a>>, __WithLocal<'pin, T, F, R>: Unpin,