[−][src]Struct futures_test::future::PendingOnce

#[must_use = "futures do nothing unless you `.await` or poll them"]
pub struct PendingOnce<Fut: Future> { /* fields omitted */ }
[−]

Combinator that guarantees one Poll::Pending before polling its inner future.

This is created by the FutureTestExt::pending_once method.

Trait Implementations

impl<Fut: Clone + Future> Clone for PendingOnce<Fut>[src][+]

fn clone_from(&mut self, source: &Self)1.0.0[src][−]

Performs copy-assignment from source. Read more

impl<Fut: Debug + Future> Debug for PendingOnce<Fut>[src][+]

impl<Fut: Future> Future for PendingOnce<Fut>[src][+]

type Output = Fut::Output

The type of value produced on completion.

impl<Fut: Future + FusedFuture> FusedFuture for PendingOnce<Fut>[src][+]

Auto Trait Implementations

impl<Fut> Send for PendingOnce<Fut> where
    Fut: Send, 

impl<Fut> Unpin for PendingOnce<Fut> where
    Fut: Unpin, 

impl<Fut> Sync for PendingOnce<Fut> where
    Fut: Sync, 

impl<Fut> UnwindSafe for PendingOnce<Fut> where
    Fut: UnwindSafe, 

impl<Fut> RefUnwindSafe for PendingOnce<Fut> where
    Fut: RefUnwindSafe, 

Blanket Implementations

impl<Fut> FutureTestExt for Fut where
    Fut: Future, [src][+]

ⓘImportant traits for AssertUnmoved<Fut>
fn assert_unmoved(self) -> AssertUnmoved<Self> where
    Self: Sized, [src][−]

Asserts that the given is not moved after being polled. Read more

ⓘImportant traits for PendingOnce<Fut>
fn pending_once(self) -> PendingOnce<Self> where
    Self: Sized, [src][−]

Introduces one Poll::Pending before polling the given future. Read more

fn run_in_background(self) where
    Self: Sized + Send + 'static,
    Self::Output: Send, [src][−]

Runs this future on a dedicated executor running in a background thread. Read more

ⓘImportant traits for InterleavePending<Fut>
fn interleave_pending(self) -> InterleavePending<Self> where
    Self: Sized, [src][−]

Introduces an extra Poll::Pending in between each call to poll. Read more

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

impl<T> ToOwned for T where
    T: Clone, [src][+]

type Owned = T

The resulting type after obtaining ownership.

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

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.

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

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

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

impl<F, T, E> TryFuture for F where
    F: Future<Output = Result<T, E>> + ?Sized, [src][+]

type Ok = T

The type of successful values yielded by this future

type Error = E

The type of failures yielded by this future

impl<T> FutureExt for T where
    T: Future + ?Sized, [src][+]

fn map<U, F>(self, f: F) -> Map<Self, F> where
    F: FnOnce(Self::Output) -> U, [src][−]

Map this future's output to a different type, returning a new future of the resulting type. Read more

fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
    F: FnOnce(Self::Output) -> Fut,
    Fut: Future, [src][−]

Chain on a computation for when a future finished, passing the result of the future to the provided closure f. Read more

fn left_future<B>(self) -> Either<Self, B> where
    B: Future<Output = Self::Output>, [src][−]

Wrap this future in an Either future, making it the left-hand variant of that Either. Read more

fn right_future<A>(self) -> Either<A, Self> where
    A: Future<Output = Self::Output>, [src][−]

Wrap this future in an Either future, making it the right-hand variant of that Either. Read more

fn into_stream(self) -> IntoStream<Self>[src][−]

Convert this future into a single element stream. Read more

fn flatten(self) -> Flatten<Self> where
    Self::Output: Future, [src][−]

Flatten the execution of this future when the successful result of this future is itself another future. Read more

fn flatten_stream(self) -> FlattenStream<Self> where
    Self::Output: Stream, [src][−]

Flatten the execution of this future when the successful result of this future is a stream. Read more

fn fuse(self) -> Fuse<Self>[src][−]

Fuse a future such that poll will never again be called once it has completed. This method can be used to turn any Future into a FusedFuture. Read more

fn inspect<F>(self, f: F) -> Inspect<Self, F> where
    F: FnOnce(&Self::Output), [src][−]

Do something with the output of a future before passing it on. Read more

fn catch_unwind(self) -> CatchUnwind<Self> where
    Self: UnwindSafe, [src][−]

Catches unwinding panics while polling the future. Read more

fn shared(self) -> Shared<Self> where
    Self::Output: Clone, [src][−]

Create a cloneable handle to this future where all handles will resolve to the same result. Read more

fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)[src][−]

Turn this future into a future that yields () on completion and sends its output to another future on a separate task. Read more

fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send>> where
    Self: Send + 'a, [src][−]

Wrap the future in a Box, pinning it.

fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>> where
    Self: 'a, [src][−]

Wrap the future in a Box, pinning it. Read more

fn unit_error(self) -> UnitError<Self>[src][−]

Turns a Future<Output = T> into a TryFuture<Ok = T, Error = ()>. Read more

fn never_error(self) -> NeverError<Self>[src][−]

Turns a Future<Output = T> into a TryFuture<Ok = T, Error = Never>. Read more

fn poll_unpin(&mut self, cx: &mut Context) -> Poll<Self::Output> where
    Self: Unpin, [src][−]

A convenience for calling Future::poll on Unpin future types.

impl<Fut> TryFutureExt for Fut where
    Fut: TryFuture + ?Sized, [src][+]

fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where
    Self::Ok: Sink<Item>,
    <Self::Ok as Sink<Item>>::Error == Self::Error, [src][−]

Flattens the execution of this future when the successful result of this future is a [Sink]. Read more

fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where
    F: FnOnce(Self::Ok) -> T, [src][−]

Maps this future's success value to a different value. Read more

fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where
    F: FnOnce(Self::Error) -> E, [src][−]

Maps this future's error value to a different value. Read more

fn err_into<E>(self) -> ErrInto<Self, E> where
    Self::Error: Into<E>, [src][−]

Maps this future's Error to a new error type using the Into trait. Read more

fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where
    F: FnOnce(Self::Ok) -> Fut,
    Fut: TryFuture<Error = Self::Error>, [src][−]

Executes another future after this one resolves successfully. The success value is passed to a closure to create this subsequent future. Read more

fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where
    F: FnOnce(Self::Error) -> Fut,
    Fut: TryFuture<Ok = Self::Ok>, [src][−]

Executes another future if this one resolves to an error. The error value is passed to a closure to create this subsequent future. Read more

fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where
    F: FnOnce(&Self::Ok), [src][−]

Do something with the success value of a future before passing it on. Read more

fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
    F: FnOnce(&Self::Error), [src][−]

Do something with the error value of a future before passing it on. Read more

fn try_flatten_stream(self) -> TryFlattenStream<Self> where
    Self::Ok: TryStream,
    <Self::Ok as TryStream>::Error == Self::Error, [src][−]

Flatten the execution of this future when the successful result of this future is a stream. Read more

fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where
    F: FnOnce(Self::Error) -> Self::Ok, [src][−]

Unwraps this future's ouput, producing a future with this future's Ok type as its Output type. Read more

fn compat(self) -> Compat<Self> where
    Self: Unpin, [src][−]

Wraps a [TryFuture] into a future compatable with libraries using futures 0.1 future definitons. Requires the compat feature to enable. Read more

fn into_future(self) -> IntoFuture<Self>[src][−]

Wraps a [TryFuture] into a type that implements Future. Read more

fn try_poll_unpin(
    &mut self,
    cx: &mut Context
) -> Poll<Result<Self::Ok, Self::Error>> where
    Self: Unpin, [src][−]

A convenience method for calling [TryFuture::try_poll] on [Unpin] future types. Read more

impl<V, T> VZip<V> for T where
    V: MultiLane<T>, [+]