Struct tokio_sync::oneshot::Receiver

[+] Show declaration

pub struct Receiver<T> { /* fields omitted */ }

[−] Expand description

Receive a value from the associated Sender.

Instances are created by the channel function.

Implementations

impl<T> Receiver<T>[−]

pub fn close(&mut self)[−]

Prevent the associated Sender handle from sending a value.

Any send operation which happens after calling close is guaranteed to fail. After calling close, Receiver::poll] should be called to receive a value if one was sent before the call to close completed.

pub fn try_recv(&mut self) -> Result<T, TryRecvError>[−]

Attempts to receive a value outside of the context of a task.

Does not register a task if no value has been sent.

A return value of None must be considered immediately stale (out of date) unless close has been called first.

Returns an error if the sender was dropped.

Trait Implementations

impl<T: Debug> Debug for Receiver<T>[+]

[+] Show hidden undocumented items

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

Formats the value using the given formatter.

impl<T> Drop for Receiver<T>[+]

[+] Show hidden undocumented items

fn drop(&mut self)[−]

Executes the destructor for this type.

impl<T> Future for Receiver<T>[+]

[+] Show hidden undocumented items

type Item = T

The type of value that this future will resolved with if it is successful.

type Error = RecvError

The type of error that this future will resolve with if it fails in a normal fashion.

fn poll(&mut self) -> Poll<T, RecvError>[−]

Query this future to see if its value has become available, registering interest if it is not.

pub fn wait(self) -> Result<Self::Item, Self::Error>[−]

Block the current thread until this future is resolved.

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

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

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

Map this future’s error to a different error, returning a new future.

pub fn from_err<E>(self) -> FromErr<Self, E> where
    E: From<Self::Error>, [−]

Map this future’s error to any error implementing From for this future’s Error, returning a new future.

pub fn then<F, B>(self, f: F) -> Then<Self, B, F> where
    F: FnOnce(Result<Self::Item, Self::Error>) -> B,
    B: IntoFuture, [−]

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

pub fn and_then<F, B>(self, f: F) -> AndThen<Self, B, F> where
    F: FnOnce(Self::Item) -> B,
    B: IntoFuture<Error = Self::Error>, [−]

Execute another future after this one has resolved successfully.

pub fn or_else<F, B>(self, f: F) -> OrElse<Self, B, F> where
    F: FnOnce(Self::Error) -> B,
    B: IntoFuture<Item = Self::Item>, [−]

Execute another future if this one resolves with an error.

pub fn select<B>(self, other: B) -> Select<Self, <B as IntoFuture>::Future> where
    B: IntoFuture<Item = Self::Item, Error = Self::Error>, [−]

Waits for either one of two futures to complete.

pub fn select2<B>(self, other: B) -> Select2<Self, <B as IntoFuture>::Future> where
    B: IntoFuture, [−]

Waits for either one of two differently-typed futures to complete.

pub fn join<B>(self, other: B) -> Join<Self, <B as IntoFuture>::Future> where
    B: IntoFuture<Error = Self::Error>, [−]

Joins the result of two futures, waiting for them both to complete.

pub fn join3<B, C>(
    self,
    b: B,
    c: C
) -> Join3<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future> where
    C: IntoFuture<Error = Self::Error>,
    B: IntoFuture<Error = Self::Error>, [−]

Same as join, but with more futures.

pub fn join4<B, C, D>(
    self,
    b: B,
    c: C,
    d: D
) -> Join4<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future> where
    C: IntoFuture<Error = Self::Error>,
    B: IntoFuture<Error = Self::Error>,
    D: IntoFuture<Error = Self::Error>, [−]

Same as join, but with more futures.

pub fn join5<B, C, D, E>(
    self,
    b: B,
    c: C,
    d: D,
    e: E
) -> Join5<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future, <E as IntoFuture>::Future> where
    C: IntoFuture<Error = Self::Error>,
    B: IntoFuture<Error = Self::Error>,
    D: IntoFuture<Error = Self::Error>,
    E: IntoFuture<Error = Self::Error>, [−]

Same as join, but with more futures.

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

Convert this future into a single element stream.

pub fn flatten(self) -> Flatten<Self> where
    Self::Item: IntoFuture,
    <Self::Item as IntoFuture>::Error: From<Self::Error>, [−]

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

pub fn flatten_stream(self) -> FlattenStream<Self> where
    Self::Item: Stream,
    <Self::Item as Stream>::Error == Self::Error, [−]

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

pub fn fuse(self) -> Fuse<Self>[−]

Fuse a future such that poll will never again be called once it has completed.

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

Do something with the item of a future, passing it on.

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

Catches unwinding panics while polling the future.

pub fn shared(self) -> Shared<Self>[−]

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