Struct capnp::capability::Promise[−][src]

#[must_use = "futures do nothing unless polled"]pub struct Promise<T, E> { /* fields omitted */ }

A computation that might eventually resolve to a value of type T or to an error of type E. Dropping the promise cancels the computation.

Implementations

impl<T, E> Promise<T, E>[src]

pub fn ok(value: T) -> Promise<T, E>ⓘ

Notable traits for Promise<T, E>

impl<T, E> Future for Promise<T, E> type Output = Result<T, E>;
[src]

pub fn err(error: E) -> Promise<T, E>ⓘ

Notable traits for Promise<T, E>

impl<T, E> Future for Promise<T, E> type Output = Result<T, E>;
[src]

pub fn from_future<F>(f: F) -> Promise<T, E>ⓘ

Notable traits for Promise<T, E>

impl<T, E> Future for Promise<T, E> type Output = Result<T, E>;
 where
    F: Future<Output = Result<T, E>> + 'static, [src]

Trait Implementations

impl<T, E> Future for Promise<T, E>[src]

type Output = Result<T, E>

The type of value produced on completion.

Auto Trait Implementations

impl<T, E> !RefUnwindSafe for Promise<T, E>

impl<T, E> !Send for Promise<T, E>

impl<T, E> !Sync for Promise<T, E>

impl<T, E> Unpin for Promise<T, E>

impl<T, E> !UnwindSafe for Promise<T, E>

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.