Enum futures_util::future::TryMaybeDone[−][src]

pub enum TryMaybeDone<Fut: TryFuture> {
    Future(Fut),
    Done(Fut::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::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: TryFuture> TryMaybeDone<Fut>[src]

pub fn output_mut(self: Pin<&mut Self>) -> Option<&mut Fut::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 Self>) -> Option<Fut::Ok>[src]

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

Trait Implementations

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

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

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

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

The type of value produced on completion.

impl<Fut: TryFuture + Unpin> Unpin for TryMaybeDone<Fut>[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, 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<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.