[−][src]Struct futures::future::Map

[+] Show declaration

[+] Expand attributes
#[must_use = "futures do nothing unless you `.await` or poll them"]pub struct Map<Fut, F> { /* fields omitted */ }

[−]

Future for the map method.

Trait Implementations

`impl<Fut, F> Debug for Map<Fut, F> where F: Debug, Fut: Debug,` [src][+]

[+] Show hidden undocumented items

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src][−]

`impl<Fut, F, T> FusedFuture for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future,` [src][+]

[+] Show hidden undocumented items

`fn is_terminated(&self) -> bool`[src][−]

`impl<Fut, F, T> Future for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future,` [src][+]

[+] Show hidden undocumented items

`type Output = T`

The type of value produced on completion.

`fn poll(self: Pin<&mut Map<Fut, F>>, cx: &mut Context) -> Poll<T>`[src][−]

`impl<Fut, F> Unpin for Map<Fut, F> where Fut: Unpin,` [src]

Auto Trait Implementations

`impl<Fut, F> RefUnwindSafe for Map<Fut, F> where F: RefUnwindSafe, Fut: RefUnwindSafe,`

`impl<Fut, F> Send for Map<Fut, F> where F: Send, Fut: Send,`

`impl<Fut, F> Sync for Map<Fut, F> where F: Sync, Fut: Sync,`

`impl<Fut, F> UnwindSafe for Map<Fut, F> where F: UnwindSafe, Fut: UnwindSafe,`

Blanket Implementations

`impl<T> Any for T where T: 'static + ?Sized,` [src][+]

[+] Show hidden undocumented items

`fn type_id(&self) -> TypeId`[src][−]

`impl<T> Borrow<T> for T where T: ?Sized,` [src][+]

[+] Show hidden undocumented items

`fn borrow(&self) -> &T`[src][−]

`impl<T> BorrowMut<T> for T where T: ?Sized,` [src][+]

[+] Show hidden undocumented items

`fn borrow_mut(&mut self) -> &mut T`[src][−]

`impl<T> From<T> for T`[src][+]

[+] Show hidden undocumented items

`fn from(t: T) -> T`[src][−]

`impl<T> FutureExt for T where T: Future + ?Sized,` [src][+]

[+] Show hidden undocumented items

`fn map<U, F>(self, f: F) -> Map<Self, F> where F: FnOnce(Self::Output) -> U,` [src][−]

`fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where F: FnOnce(Self::Output) -> Fut, Fut: Future,` [src][−]

`fn left_future(self) -> Either<Self, B> where B: Future<Output = Self::Output>,` [src][−]

`fn right_future<A>(self) -> Either<A, Self> where A: Future<Output = Self::Output>,` [src][−]

`fn into_stream(self) -> IntoStream<Self>`[src][−]

`fn flatten(self) -> Flatten<Self> where Self::Output: Future,` [src][−]

`fn flatten_stream(self) -> FlattenStream<Self> where Self::Output: Stream,` [src][−]

`fn fuse(self) -> Fuse<Self>`[src][−]

`fn inspect<F>(self, f: F) -> Inspect<Self, F> where F: FnOnce(&Self::Output),` [src][−]

`fn catch_unwind(self) -> CatchUnwind<Self> where Self: UnwindSafe,` [src][−]

`fn shared(self) -> Shared<Self> where Self::Output: Clone,` [src][−]

`fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)`[src][−]

`fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send>> where Self: Send + 'a,` [src][−]

`fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>> where Self: 'a,` [src][−]

`fn unit_error(self) -> UnitError<Self>`[src][−]

`fn never_error(self) -> NeverError<Self>`[src][−]

`fn poll_unpin(&mut self, cx: &mut Context) -> Poll<Self::Output> where Self: Unpin,` [src][−]

`fn now_or_never(self) -> Option<Self::Output>`[src][−]

`impl<T, U> Into for T where U: From<T>,` [src][+]

[+] Show hidden undocumented items

`fn into(self) -> U`[src][−]

`impl<F> IntoFuture for F where F: Future,` [src][+]

[+] Show hidden undocumented items

`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?

`fn into_future(self) -> <F as IntoFuture>::Future`[src][−]

`impl<T, U> TryFrom for T where U: Into<T>,` [src][+]

[+] Show hidden undocumented items

`type Error = Infallible`

The type returned in the event of a conversion error.

`fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>`[src][−]

`impl<F, T, E> TryFuture for F where F: Future<Output = Result<T, E>> + ?Sized,` [src][+]

[+] Show hidden undocumented items

`type Ok = T`

The type of successful values yielded by this future

`type Error = E`

The type of failures yielded by this future

`fn try_poll(self: Pin<&mut F>, cx: &mut Context) -> Poll<<F as Future>::Output>`[src][−]

`impl<Fut> TryFutureExt for Fut where Fut: TryFuture + ?Sized,` [src][+]

[+] Show hidden undocumented items

`fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where Self::Ok: Sink<Item>, <Self::Ok as Sink<Item>>::Error == Self::Error,` [src][−]

`fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where F: FnOnce(Self::Ok) -> T,` [src][−]

`fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> where E: FnOnce(Self::Error) -> T, F: FnOnce(Self::Ok) -> T,` [src][−]

`fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where F: FnOnce(Self::Error) -> E,` [src][−]

`fn err_into<E>(self) -> ErrInto<Self, E> where Self::Error: Into<E>,` [src][−]

`fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where F: FnOnce(Self::Ok) -> Fut, Fut: TryFuture<Error = Self::Error>,` [src][−]

`fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where F: FnOnce(Self::Error) -> Fut, Fut: TryFuture<Ok = Self::Ok>,` [src][−]

`fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where F: FnOnce(&Self::Ok),` [src][−]

`fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where F: FnOnce(&Self::Error),` [src][−]

`fn try_flatten_stream(self) -> TryFlattenStream<Self> where Self::Ok: TryStream, <Self::Ok as TryStream>::Error == Self::Error,` [src][−]

`fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where F: FnOnce(Self::Error) -> Self::Ok,` [src][−]

`fn into_future(self) -> IntoFuture<Self>`[src][−]

`fn try_poll_unpin( &mut self, cx: &mut Context ) -> Poll<Result<Self::Ok, Self::Error>> where Self: Unpin,` [src][−]

`impl<T, U> TryInto for T where U: TryFrom<T>,` [src][+]

[+] Show hidden undocumented items

`type Error = >::Error`

The type returned in the event of a conversion error.

[−][src]Struct futures::future::Map

Trait Implementations

impl<Fut, F> Debug for Map<Fut, F> where F: Debug, Fut: Debug, [src][+]

fn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src][−]

impl<Fut, F, T> FusedFuture for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future, [src][+]

fn is_terminated(&self) -> bool[src][−]

impl<Fut, F, T> Future for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future, [src][+]

type Output = T

fn poll(self: Pin<&mut Map<Fut, F>>, cx: &mut Context) -> Poll<T>[src][−]

impl<Fut, F> Unpin for Map<Fut, F> where Fut: Unpin, [src]

Auto Trait Implementations

impl<Fut, F> RefUnwindSafe for Map<Fut, F> where F: RefUnwindSafe, Fut: RefUnwindSafe,

impl<Fut, F> Send for Map<Fut, F> where F: Send, Fut: Send,

impl<Fut, F> Sync for Map<Fut, F> where F: Sync, Fut: Sync,

impl<Fut, F> UnwindSafe for Map<Fut, F> where F: UnwindSafe, Fut: UnwindSafe,

Blanket Implementations

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

fn type_id(&self) -> TypeId[src][−]

impl<T> Borrow<T> for T where T: ?Sized, [src][+]

fn borrow(&self) -> &T[src][−]

impl<T> BorrowMut<T> for T where T: ?Sized, [src][+]

fn borrow_mut(&mut self) -> &mut T[src][−]

impl<T> From<T> for T[src][+]

fn from(t: T) -> T[src][−]

impl<T> FutureExt for T where T: Future + ?Sized, [src][+]

fn map<U, F>(self, f: F) -> Map<Self, F> where F: FnOnce(Self::Output) -> U, [src][−]

fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where F: FnOnce(Self::Output) -> Fut, Fut: Future, [src][−]

fn left_future<B>(self) -> Either<Self, B> where B: Future<Output = Self::Output>, [src][−]

fn right_future<A>(self) -> Either<A, Self> where A: Future<Output = Self::Output>, [src][−]

fn into_stream(self) -> IntoStream<Self>[src][−]

fn flatten(self) -> Flatten<Self> where Self::Output: Future, [src][−]

fn flatten_stream(self) -> FlattenStream<Self> where Self::Output: Stream, [src][−]

fn fuse(self) -> Fuse<Self>[src][−]

fn inspect<F>(self, f: F) -> Inspect<Self, F> where F: FnOnce(&Self::Output), [src][−]

fn catch_unwind(self) -> CatchUnwind<Self> where Self: UnwindSafe, [src][−]

fn shared(self) -> Shared<Self> where Self::Output: Clone, [src][−]

fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)[src][−]

fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send>> where Self: Send + 'a, [src][−]

fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>> where Self: 'a, [src][−]

fn unit_error(self) -> UnitError<Self>[src][−]

fn never_error(self) -> NeverError<Self>[src][−]

fn poll_unpin(&mut self, cx: &mut Context) -> Poll<Self::Output> where Self: Unpin, [src][−]

fn now_or_never(self) -> Option<Self::Output>[src][−]

impl<T, U> Into<U> for T where U: From<T>, [src][+]

fn into(self) -> U[src][−]

impl<F> IntoFuture for F where F: Future, [src][+]

type Output = <F as Future>::Output

type Future = F

fn into_future(self) -> <F as IntoFuture>::Future[src][−]

impl<T, U> TryFrom<U> for T where U: Into<T>, [src][+]

type Error = Infallible

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

impl<F, T, E> TryFuture for F where F: Future<Output = Result<T, E>> + ?Sized, [src][+]

type Ok = T

type Error = E

fn try_poll(self: Pin<&mut F>, cx: &mut Context) -> Poll<<F as Future>::Output>[src][−]

impl<Fut> TryFutureExt for Fut where Fut: TryFuture + ?Sized, [src][+]

fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where Self::Ok: Sink<Item>, <Self::Ok as Sink<Item>>::Error == Self::Error, [src][−]

fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where F: FnOnce(Self::Ok) -> T, [src][−]

fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> where E: FnOnce(Self::Error) -> T, F: FnOnce(Self::Ok) -> T, [src][−]

fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where F: FnOnce(Self::Error) -> E, [src][−]

fn err_into<E>(self) -> ErrInto<Self, E> where Self::Error: Into<E>, [src][−]

fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where F: FnOnce(Self::Ok) -> Fut, Fut: TryFuture<Error = Self::Error>, [src][−]

fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where F: FnOnce(Self::Error) -> Fut, Fut: TryFuture<Ok = Self::Ok>, [src][−]

fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where F: FnOnce(&Self::Ok), [src][−]

fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where F: FnOnce(&Self::Error), [src][−]

fn try_flatten_stream(self) -> TryFlattenStream<Self> where Self::Ok: TryStream, <Self::Ok as TryStream>::Error == Self::Error, [src][−]

fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where F: FnOnce(Self::Error) -> Self::Ok, [src][−]

fn into_future(self) -> IntoFuture<Self>[src][−]

fn try_poll_unpin( &mut self, cx: &mut Context) -> Poll<Result<Self::Ok, Self::Error>> where Self: Unpin, [src][−]

impl<T, U> TryInto<U> for T where U: TryFrom<T>, [src][+]

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

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

`impl<Fut, F> Debug for Map<Fut, F> where F: Debug, Fut: Debug,` [src][+]

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src][−]

`impl<Fut, F, T> FusedFuture for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future,` [src][+]

`fn is_terminated(&self) -> bool`[src][−]

`impl<Fut, F, T> Future for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future,` [src][+]

`type Output = T`

`fn poll(self: Pin<&mut Map<Fut, F>>, cx: &mut Context) -> Poll<T>`[src][−]

`impl<Fut, F> Unpin for Map<Fut, F> where Fut: Unpin,` [src]

`impl<Fut, F> RefUnwindSafe for Map<Fut, F> where F: RefUnwindSafe, Fut: RefUnwindSafe,`

`impl<Fut, F> Send for Map<Fut, F> where F: Send, Fut: Send,`

`impl<Fut, F> Sync for Map<Fut, F> where F: Sync, Fut: Sync,`

`impl<Fut, F> UnwindSafe for Map<Fut, F> where F: UnwindSafe, Fut: UnwindSafe,`

`impl<T> Any for T where T: 'static + ?Sized,` [src][+]

`fn type_id(&self) -> TypeId`[src][−]

`impl<T> Borrow<T> for T where T: ?Sized,` [src][+]

`fn borrow(&self) -> &T`[src][−]

`impl<T> BorrowMut<T> for T where T: ?Sized,` [src][+]

`fn borrow_mut(&mut self) -> &mut T`[src][−]

`impl<T> From<T> for T`[src][+]

`fn from(t: T) -> T`[src][−]

`impl<T> FutureExt for T where T: Future + ?Sized,` [src][+]

`fn map<U, F>(self, f: F) -> Map<Self, F> where F: FnOnce(Self::Output) -> U,` [src][−]

`fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where F: FnOnce(Self::Output) -> Fut, Fut: Future,` [src][−]

`fn left_future<B>(self) -> Either<Self, B> where B: Future<Output = Self::Output>,` [src][−]

`fn right_future<A>(self) -> Either<A, Self> where A: Future<Output = Self::Output>,` [src][−]

`fn into_stream(self) -> IntoStream<Self>`[src][−]

`fn flatten(self) -> Flatten<Self> where Self::Output: Future,` [src][−]

`fn flatten_stream(self) -> FlattenStream<Self> where Self::Output: Stream,` [src][−]

`fn fuse(self) -> Fuse<Self>`[src][−]

`fn inspect<F>(self, f: F) -> Inspect<Self, F> where F: FnOnce(&Self::Output),` [src][−]

`fn catch_unwind(self) -> CatchUnwind<Self> where Self: UnwindSafe,` [src][−]

`fn shared(self) -> Shared<Self> where Self::Output: Clone,` [src][−]

`fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)`[src][−]

`fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send>> where Self: Send + 'a,` [src][−]

`fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>> where Self: 'a,` [src][−]

`fn unit_error(self) -> UnitError<Self>`[src][−]

`fn never_error(self) -> NeverError<Self>`[src][−]

`fn poll_unpin(&mut self, cx: &mut Context) -> Poll<Self::Output> where Self: Unpin,` [src][−]

`fn now_or_never(self) -> Option<Self::Output>`[src][−]

`impl<T, U> Into<U> for T where U: From<T>,` [src][+]

`fn into(self) -> U`[src][−]

`impl<F> IntoFuture for F where F: Future,` [src][+]

`type Output = <F as Future>::Output`

`type Future = F`

`fn into_future(self) -> <F as IntoFuture>::Future`[src][−]

`impl<T, U> TryFrom<U> for T where U: Into<T>,` [src][+]

`type Error = Infallible`

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`[src][−]

`impl<F, T, E> TryFuture for F where F: Future<Output = Result<T, E>> + ?Sized,` [src][+]

`type Ok = T`

`type Error = E`

`fn try_poll(self: Pin<&mut F>, cx: &mut Context) -> Poll<<F as Future>::Output>`[src][−]

`impl<Fut> TryFutureExt for Fut where Fut: TryFuture + ?Sized,` [src][+]

`fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where Self::Ok: Sink<Item>, <Self::Ok as Sink<Item>>::Error == Self::Error,` [src][−]

`fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where F: FnOnce(Self::Ok) -> T,` [src][−]

`fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> where E: FnOnce(Self::Error) -> T, F: FnOnce(Self::Ok) -> T,` [src][−]

`fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where F: FnOnce(Self::Error) -> E,` [src][−]

`fn err_into<E>(self) -> ErrInto<Self, E> where Self::Error: Into<E>,` [src][−]

`fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where F: FnOnce(Self::Ok) -> Fut, Fut: TryFuture<Error = Self::Error>,` [src][−]

`fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where F: FnOnce(Self::Error) -> Fut, Fut: TryFuture<Ok = Self::Ok>,` [src][−]

`fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where F: FnOnce(&Self::Ok),` [src][−]

`fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where F: FnOnce(&Self::Error),` [src][−]

`fn try_flatten_stream(self) -> TryFlattenStream<Self> where Self::Ok: TryStream, <Self::Ok as TryStream>::Error == Self::Error,` [src][−]

`fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where F: FnOnce(Self::Error) -> Self::Ok,` [src][−]

`fn into_future(self) -> IntoFuture<Self>`[src][−]

`fn try_poll_unpin( &mut self, cx: &mut Context ) -> Poll<Result<Self::Ok, Self::Error>> where Self: Unpin,` [src][−]

`impl<T, U> TryInto<U> for T where U: TryFrom<T>,` [src][+]

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

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`[src][−]