Enum futures::prelude::future::TryMaybeDone[−][src]

[−]
pub enum TryMaybeDone<Fut> where
    Fut: TryFuture,  {
    Future(Fut),
    Done(<Fut as TryFuture>::Ok),
    Gone,
}
[−]

A future that may have completed with an error.

This is created by the try_maybe_done() function.

Variants

Future(Fut)
[−]

A not-yet-completed future

Done(<Fut as TryFuture>::Ok)
[−]

The output of the completed future

Gone
[−]

The empty variant after the result of a TryMaybeDone has been taken using the take_output method, or if the future returned an error.

Implementations

impl<Fut> TryMaybeDone<Fut> where
    Fut: TryFuture, [src][−]

pub fn output_mut(
    self: Pin<&mut TryMaybeDone<Fut>>
) -> Option<&mut <Fut as TryFuture>::Ok>[src][−]

Returns an Option containing a mutable reference to the output of the future. The output of this method will be Some if and only if the inner future has completed successfully and take_output has not yet been called.

pub fn take_output(
    self: Pin<&mut TryMaybeDone<Fut>>
) -> Option<<Fut as TryFuture>::Ok>[src][−]

Attempt to take the output of a TryMaybeDone without driving it towards completion.

Trait Implementations

impl<Fut> Debug for TryMaybeDone<Fut> where
    Fut: Debug + TryFuture,
    <Fut as TryFuture>::Ok: Debug, [src][+]

impl<Fut> FusedFuture for TryMaybeDone<Fut> where
    Fut: TryFuture, [src][+]

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

type Output = Result<(), <Fut as TryFuture>::Error>

The type of value produced on completion.

impl<Fut> Unpin for TryMaybeDone<Fut> where
    Fut: TryFuture + Unpin, [src]

Auto Trait Implementations

impl<Fut> RefUnwindSafe for TryMaybeDone<Fut> where
    Fut: RefUnwindSafe,
    <Fut as TryFuture>::Ok: RefUnwindSafe, 

impl<Fut> Send for TryMaybeDone<Fut> where
    Fut: Send,
    <Fut as TryFuture>::Ok: Send, 

impl<Fut> Sync for TryMaybeDone<Fut> where
    Fut: Sync,
    <Fut as TryFuture>::Ok: Sync, 

impl<Fut> UnwindSafe for TryMaybeDone<Fut> where
    Fut: UnwindSafe,
    <Fut as TryFuture>::Ok: UnwindSafe, 

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> FutureExt for T where
    T: Future + ?Sized, [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<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<Fut> TryFutureExt for Fut where
    Fut: TryFuture + ?Sized, [src][+]

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.