pub struct MapErr<Fut, F> { /* private fields */ }
Expand description
Future for the map_err
method.
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§impl<Fut, F> FusedFuture for MapErr<Fut, F>
impl<Fut, F> FusedFuture for MapErr<Fut, F>
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fn is_terminated(&self) -> bool
Returns
true
if the underlying future should no longer be polled.§impl<Fut, F> Future for MapErr<Fut, F>
impl<Fut, F> Future for MapErr<Fut, F>
impl<'__pin, Fut, F> Unpin for MapErr<Fut, F>where
__Origin<'__pin, Fut, F>: Unpin,
Auto Trait Implementations§
impl<Fut, F> Freeze for MapErr<Fut, F>
impl<Fut, F> RefUnwindSafe for MapErr<Fut, F>where
Fut: RefUnwindSafe,
F: RefUnwindSafe,
impl<Fut, F> Send for MapErr<Fut, F>
impl<Fut, F> Sync for MapErr<Fut, F>
impl<Fut, F> UnwindSafe for MapErr<Fut, F>where
Fut: UnwindSafe,
F: UnwindSafe,
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§fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> ⓘ
fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> ⓘ
Maps this future’s success value to a different value, and permits for error handling resulting in the same type. Read more
§fn map_err<E, F>(self, f: F) -> MapErr<Self, F> ⓘ
fn map_err<E, F>(self, f: F) -> MapErr<Self, F> ⓘ
Maps this future’s error value to a different value. Read more
§fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> ⓘ
fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> ⓘ
Executes another future after this one resolves successfully. The
success value is passed to a closure to create this subsequent future. Read more
§fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> ⓘ
fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> ⓘ
Executes another future if this one resolves to an error. The
error value is passed to a closure to create this subsequent future. Read more
§fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> ⓘ
fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> ⓘ
Do something with the success value of a future before passing it on. Read more
§fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> ⓘ
fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> ⓘ
Do something with the error value of a future before passing it on. Read more
§fn try_flatten(self) -> TryFlatten<Self, Self::Ok> ⓘ
fn try_flatten(self) -> TryFlatten<Self, Self::Ok> ⓘ
Flatten the execution of this future when the successful result of this
future is another future. Read more
§fn try_flatten_stream(self) -> TryFlattenStream<Self>
fn try_flatten_stream(self) -> TryFlattenStream<Self>
Flatten the execution of this future when the successful result of this
future is a stream. Read more
§fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> ⓘ
fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> ⓘ
§fn compat(self) -> Compat<Self>
fn compat(self) -> Compat<Self>
Wraps a
TryFuture
into a future compatible with libraries using
futures 0.1 future definitions. Requires the compat
feature to enable.§fn into_future(self) -> IntoFuture<Self> ⓘwhere
Self: Sized,
fn into_future(self) -> IntoFuture<Self> ⓘwhere
Self: Sized,
§fn try_poll_unpin(
&mut self,
cx: &mut Context<'_>,
) -> Poll<Result<Self::Ok, Self::Error>>where
Self: Unpin,
fn try_poll_unpin(
&mut self,
cx: &mut Context<'_>,
) -> Poll<Result<Self::Ok, Self::Error>>where
Self: Unpin,
A convenience method for calling
TryFuture::try_poll
on Unpin
future types.