Skip to main content

AndThenAsync

async_err::future_ext

Struct AndThenAsync 

Source 
pub struct AndThenAsync<Fut1, Fut2, F> { /* private fields */ }
Expand description

Future that chains two async computations sequentially.

Internally manages polling of the first, then the second future produced by the chaining closure.

Trait Implementations§

Source§

impl<Fut1, Fut2, F, T, U, E> Future for AndThenAsync<Fut1, Fut2, F>
where Fut1: Future<Output = Result<T, E>>, Fut2: Future<Output = Result<U, E>>, F: FnOnce(T) -> Fut2,

Source§

type Output = Result<U, E>

The type of value produced on completion.
Source§

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

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

Auto Trait Implementations§

§

impl<Fut1, Fut2, F> Freeze for AndThenAsync<Fut1, Fut2, F>
where Fut1: Freeze, Fut2: Freeze, F: Freeze,

§

impl<Fut1, Fut2, F> RefUnwindSafe for AndThenAsync<Fut1, Fut2, F>
where Fut1: RefUnwindSafe, Fut2: RefUnwindSafe, F: RefUnwindSafe,

§

impl<Fut1, Fut2, F> Send for AndThenAsync<Fut1, Fut2, F>
where Fut1: Send, Fut2: Send, F: Send,

§

impl<Fut1, Fut2, F> Sync for AndThenAsync<Fut1, Fut2, F>
where Fut1: Sync, Fut2: Sync, F: Sync,

§

impl<Fut1, Fut2, F> Unpin for AndThenAsync<Fut1, Fut2, F>
where Fut1: Unpin, Fut2: Unpin, F: Unpin,

§

impl<Fut1, Fut2, F> UnsafeUnpin for AndThenAsync<Fut1, Fut2, F>
where Fut1: UnsafeUnpin, Fut2: UnsafeUnpin, F: UnsafeUnpin,

§

impl<Fut1, Fut2, F> UnwindSafe for AndThenAsync<Fut1, Fut2, F>
where Fut1: UnwindSafe, Fut2: UnwindSafe, F: UnwindSafe,

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T, E, F> AsyncResultChainExt<T, E> for F
where F: Future<Output = Result<T, E>>,

Source§

fn and_then_async<Fut, F, U>(self, f: F) -> AndThenAsync<Self, Fut, F> ⓘ
where F: FnOnce(T) -> Fut, Fut: Future<Output = Result<U, E>>,

Chains an asynchronous computation to execute if the previous future resolves to Ok. Read more
Source§

impl<T, E, Fut> AsyncResultExt<T, E> for Fut
where Fut: Future<Output = Result<T, E>>,

Source§

fn with_context<C>(self, ctx: C) -> WithContext<Self, E, C> ⓘ
where C: FnOnce(&E) -> String,

Adds context to an error produced by this future lazily. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<F> IntoFuture for F
where F: Future,

Source§

type Output = <F as Future>::Output

The output that the future will produce on completion.
Source§

type IntoFuture = F

Which kind of future are we turning this into?
Source§

fn into_future(self) -> <F as IntoFuture>::IntoFuture

Creates a future from a value. Read more
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.