[−][src]Struct async_fuse::PollFn

pub struct PollFn<T, P, O> where
    T: Unpin,
    P: Unpin,
    P: FnMut(&mut T, &mut Context<'_>) -> Poll<O>,  { /* fields omitted */ }

Fusing adapter that is capable of polling an interior value that is being fused using a custom polling function.

See poll_fn for details.

Implementations

impl<T, P, O> PollFn<T, P, O> where
    T: Unpin,
    P: Unpin,
    P: FnMut(&mut T, &mut Context<'_>) -> Poll<O>, [src]

pub fn set(&mut self, value: T)[src]

Set the fused value to be something else. The previous value will be dropped.

The signature of this function is optimized towards being pinned.

Examples

use tokio::time;
use std::time::Duration;

let mut interval = async_fuse::poll_fn(time::interval(Duration::from_millis(200)), time::Interval::poll_tick);

interval.set(time::interval(Duration::from_secs(10)));

pub fn clear(&mut self)[src]

Clear the fused value.

This will cause the old value to be dropped if present.

Examples

use tokio::time;
use std::time::Duration;

let mut interval = async_fuse::poll_fn(time::interval(Duration::from_millis(200)), time::Interval::poll_tick);

assert!(!interval.is_empty());
interval.clear();
assert!(interval.is_empty());

pub fn is_empty(&self) -> bool[src]

Test if the polled for value is empty.

Examples

use tokio::time;
use std::time::Duration;

let mut interval = async_fuse::poll_fn(time::interval(Duration::from_millis(200)), time::Interval::poll_tick);

assert!(!interval.is_empty());
interval.clear();
assert!(interval.is_empty());

Trait Implementations

impl<T, P, O> Future for PollFn<T, P, O> where
    T: Unpin,
    P: Unpin,
    P: FnMut(&mut T, &mut Context<'_>) -> Poll<O>, [src]

type Output = O

The type of value produced on completion.

Auto Trait Implementations

impl<T, P, O> RefUnwindSafe for PollFn<T, P, O> where
    P: RefUnwindSafe,
    T: RefUnwindSafe, [src]

impl<T, P, O> Send for PollFn<T, P, O> where
    P: Send,
    T: Send, [src]

impl<T, P, O> Sync for PollFn<T, P, O> where
    P: Sync,
    T: Sync, [src]

impl<T, P, O> Unpin for PollFn<T, P, O>[src]

impl<T, P, O> UnwindSafe for PollFn<T, P, O> where
    P: UnwindSafe,
    T: UnwindSafe, [src]

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, [src]

impl<F> IntoFuture for F where
    F: Future, [src]

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 Future = F

🔬 This is a nightly-only experimental API. (into_future)

Which kind of future are we turning this into?

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.