Struct plumbing::Resolver[−][src]

#[must_use = "Resolvers do nothing unless polled"]
pub struct Resolver<St: Stream + Unpin> { /* fields omitted */ }

A Future associated with a request submitted through a Pipeline.

When you successfully submit a request to a Pipeline, it returns a Resolver that can be awaited to retrieve the response for that request. Because responses are retrieved lazily and in order, each Resolver must be awaited in order to receive the responses; later Resolvers will block indefinitely until earlier Resolvers have returned their responses (or been dropped).

If the [Stream] used by the Pipeline to retrieve responses closes prematurely, the stream will be dropped and all remaining (and new) Resolvers will return None.

If a Resolver is dropped, the response associated with it will simply be discarded.

Trait Implementations

impl<St: Debug + Stream + Unpin> Debug for Resolver<St>[src]

fn fmt(&self, f: &mut Formatter<'_>) -> Result[src]

Formats the value using the given formatter. Read more

impl<St: Stream + Unpin> Drop for Resolver<St>[src]

fn drop(&mut self)[src]

Executes the destructor for this type. Read more

impl<St: Stream + Unpin> FusedFuture for Resolver<St>[src]

fn is_terminated(&self) -> bool[src]

Returns true if the underlying future should no longer be polled.

impl<St: Stream + Unpin> Future for Resolver<St>[src]

type Output = Option<St::Item>

The type of value produced on completion.

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

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

Auto Trait Implementations

impl<St> !RefUnwindSafe for Resolver<St>

impl<St> Send for Resolver<St> where
    St: Send, 

impl<St> Sync for Resolver<St> where
    St: Send + Sync, 

impl<St> Unpin for Resolver<St>

impl<St> !UnwindSafe for Resolver<St>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

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

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

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

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

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

pub fn from(t: T) -> T[src]

Performs the conversion.

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

#[must_use = "futures do nothing unless you `.await` or poll them"]
fn with_background<B>(self, background: B) -> ForegroundBackground<Self, B> where
    B: Future<Output = ()> + FusedFuture, [src]

Arrange for a future to run concurrently with a background future. Read more

#[must_use = "futures do nothing unless you `.await` or poll them"]
fn with_try_background<B>(
    self,
    background: B
) -> TryForegroundBackground<Self, B> where
    B: TryFuture<Ok = ()> + FusedFuture, [src]

Arrange for a future to run concurrently with a fallible background future. Read more

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

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

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

fn map_into<U>(self) -> MapInto<Self, U> where
    Self::Output: Into<U>, 

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, 

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>, 

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>, 

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

fn into_stream(self) -> IntoStream<Self>

Convert this future into a single element stream. Read more

fn flatten(self) -> Flatten<Self> where
    Self::Output: Future, 

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

fn flatten_stream(self) -> FlattenStream<Self> where
    Self::Output: Stream, 

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

fn fuse(self) -> Fuse<Self>

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), 

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

fn catch_unwind(self) -> CatchUnwind<Self> where
    Self: UnwindSafe, 

Catches unwinding panics while polling the future. Read more

fn shared(self) -> Shared<Self> where
    Self::Output: Clone, 

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>)

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, Global>> where
    Self: Send + 'a, 

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

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

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

fn unit_error(self) -> UnitError<Self>

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

fn never_error(self) -> NeverError<Self>

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, 

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

fn now_or_never(self) -> Option<Self::Output>

Evaluates and consumes the future, returning the resulting output if the future is ready after the first call to Future::poll. Read more

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

pub fn into(self) -> U[src]

Performs the conversion.

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?

pub fn into_future(self) -> <F as IntoFuture>::Future[src]

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

Creates a future from a value.

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.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

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.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.