Struct futures_util::try_future::MapErr

[+] Show declaration

[+] Expand attributes
#[must_use = "futures do nothing unless polled"]
pub struct MapErr<Fut, F> { /* fields omitted */ }

[−] Expand description

Future for the map_err combinator.

Trait Implementations

impl<Fut: Debug, F: Debug> Debug for MapErr<Fut, F>

[+]

fn fmt(&self, f: &mut Formatter) -> Result

[−]

Formats the value using the given formatter.

impl<Fut: Unpin, F> Unpin for MapErr<Fut, F>

impl<Fut, F, E> Future for MapErr<Fut, F> where     Fut: TryFuture,     F: FnOnce(Fut::Error) -> E,

[+]

type Output = Result<Fut::Ok, E>

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

futures in libcore are unstable

The result of the Future.

fn poll(self: PinMut<Self>, cx: &mut Context) -> Poll<Self::Output>

[−]

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

futures in libcore are unstable

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