[−][src]Struct futures::future::Select

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

[−]

Future for the select() function.

Trait Implementations

`impl<A, B> FusedFuture for Select<A, B> where A: Future + Unpin, B: Future + Unpin,` [src][+]

[+] Show hidden undocumented items

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

`impl<A, B> Future for Select<A, B> where A: Future + Unpin, B: Future + Unpin,` [src][+]

[+] Show hidden undocumented items

`type Output = Either<(<A as Future>::Output, B), (::Output, A)>`

The type of value produced on completion.

`fn poll( self: Pin<&mut Select<A, B>>, cx: &mut Context ) -> Poll<<Select<A, B> as Future>::Output>`[src][−]

`impl<A, B> Debug for Select<A, B> where A: Debug, B: Debug,` [src][+]

[+] Show hidden undocumented items

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

`impl<A, B> Unpin for Select<A, B> where A: Unpin, B: Unpin,` [src]

Auto Trait Implementations

`impl<A, B> Send for Select<A, B> where A: Send, B: Send,`

`impl<A, B> Sync for Select<A, B> where A: Sync, B: Sync,`

Blanket Implementations

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

[+] Show hidden undocumented items

`fn from(t: T) -> T`[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<T, U> Into for T where U: From<T>,` [src][+]

[+] Show hidden undocumented items

`fn into(self) -> U`[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.

`fn try_into(self) -> Result<U, >::Error>`[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> Any for T where T: 'static + ?Sized,` [src][+]

[+] Show hidden undocumented items

`fn type_id(&self) -> TypeId`[src][−]

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

[+] Show hidden undocumented items

ⓘImportant traits for Map<Fut, F>
Important traits for Map<Fut, F>
`impl<Fut, F, T> Future for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future, type Output = T;`
`fn map<U, F>(self, f: F) -> Map<Self, F> where F: FnOnce(Self::Output) -> U,` [src][−]

ⓘImportant traits for Then<Fut1, Fut2, F>
Important traits for Then<Fut1, Fut2, F>
`impl<Fut1, Fut2, F> Future for Then<Fut1, Fut2, F> where F: FnOnce(<Fut1 as Future>::Output) -> Fut2, Fut1: Future, Fut2: Future, type Output = <Fut2 as Future>::Output;`
`fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where F: FnOnce(Self::Output) -> Fut, Fut: Future,` [src][−]

ⓘImportant traits for Either<A, B>
Important traits for Either<A, B>
`impl<A, B> Future for Either<A, B> where A: Future, B: Future<Output = <A as Future>::Output>, type Output = <A as Future>::Output;`
`fn left_future(self) -> Either<Self, B> where B: Future<Output = Self::Output>,` [src][−]

ⓘImportant traits for Either<A, B>
Important traits for Either<A, B>
`impl<A, B> Future for Either<A, B> where A: Future, B: Future<Output = <A as Future>::Output>, type Output = <A as Future>::Output;`
`fn right_future<A>(self) -> Either<A, Self> where A: Future<Output = Self::Output>,` [src][−]

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

ⓘImportant traits for Flatten<Fut>
Important traits for Flatten<Fut>
`impl<Fut> Future for Flatten<Fut> where Fut: Future, <Fut as Future>::Output: Future, type Output = <<Fut as Future>::Output as Future>::Output;`
`fn flatten(self) -> Flatten<Self> where Self::Output: Future,` [src][−]

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

ⓘImportant traits for Fuse<Fut>
Important traits for Fuse<Fut>
`impl<Fut> Future for Fuse<Fut> where Fut: Future, type Output = <Fut as Future>::Output;`
`fn fuse(self) -> Fuse<Self>`[src][−]

ⓘImportant traits for Inspect<Fut, F>
Important traits for Inspect<Fut, F>
`impl<Fut, F> Future for Inspect<Fut, F> where F: FnOnce(&<Fut as Future>::Output), Fut: Future, type Output = <Fut as Future>::Output;`
`fn inspect<F>(self, f: F) -> Inspect<Self, F> where F: FnOnce(&Self::Output),` [src][−]

ⓘImportant traits for UnitError<Fut>
Important traits for UnitError<Fut>
`impl<Fut, T> Future for UnitError<Fut> where Fut: Future<Output = T>, type Output = Result<T, ()>;`
`fn unit_error(self) -> UnitError<Self>`[src][−]

ⓘImportant traits for NeverError<Fut>
Important traits for NeverError<Fut>
`impl<Fut, T> Future for NeverError<Fut> where Fut: Future<Output = T>, type Output = Result<T, Infallible>;`
`fn never_error(self) -> NeverError<Self>`[src][−]

[−][src]Struct futures::future::Select

Trait Implementations

impl<A, B> FusedFuture for Select<A, B> where A: Future + Unpin, B: Future + Unpin, [src][+]

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

impl<A, B> Future for Select<A, B> where A: Future + Unpin, B: Future + Unpin, [src][+]

type Output = Either<(<A as Future>::Output, B), (<B as Future>::Output, A)>

fn poll( self: Pin<&mut Select<A, B>>, cx: &mut Context) -> Poll<<Select<A, B> as Future>::Output>[src][−]

impl<A, B> Debug for Select<A, B> where A: Debug, B: Debug, [src][+]

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

impl<A, B> Unpin for Select<A, B> where A: Unpin, B: Unpin, [src]

Auto Trait Implementations

impl<A, B> Send for Select<A, B> where A: Send, B: Send,

impl<A, B> Sync for Select<A, B> where A: Sync, B: Sync,

Blanket Implementations

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

fn from(t: T) -> T[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<T, U> Into<U> for T where U: From<T>, [src][+]

fn into(self) -> U[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<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> Any for T where T: 'static + ?Sized, [src][+]

fn type_id(&self) -> TypeId[src][−]

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

ⓘImportant traits for Map<Fut, F>Important traits for Map<Fut, F>impl<Fut, F, T> Future for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future, type Output = T;fn map<U, F>(self, f: F) -> Map<Self, F> where F: FnOnce(Self::Output) -> U, [src][−]

Important traits for Map<Fut, F>

Important traits for Then<Fut1, Fut2, F>

ⓘImportant traits for Either<A, B>Important traits for Either<A, B>impl<A, B> Future for Either<A, B> where A: Future, B: Future<Output = <A as Future>::Output>, type Output = <A as Future>::Output;fn left_future<B>(self) -> Either<Self, B> where B: Future<Output = Self::Output>, [src][−]

Important traits for Either<A, B>

ⓘImportant traits for Either<A, B>Important traits for Either<A, B>impl<A, B> Future for Either<A, B> where A: Future, B: Future<Output = <A as Future>::Output>, type Output = <A as Future>::Output;fn right_future<A>(self) -> Either<A, Self> where A: Future<Output = Self::Output>, [src][−]

Important traits for Either<A, B>

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

ⓘImportant traits for Flatten<Fut>Important traits for Flatten<Fut>impl<Fut> Future for Flatten<Fut> where Fut: Future, <Fut as Future>::Output: Future, type Output = <<Fut as Future>::Output as Future>::Output;fn flatten(self) -> Flatten<Self> where Self::Output: Future, [src][−]

Important traits for Flatten<Fut>

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

ⓘImportant traits for Fuse<Fut>Important traits for Fuse<Fut>impl<Fut> Future for Fuse<Fut> where Fut: Future, type Output = <Fut as Future>::Output;fn fuse(self) -> Fuse<Self>[src][−]

Important traits for Fuse<Fut>

ⓘImportant traits for Inspect<Fut, F>Important traits for Inspect<Fut, F>impl<Fut, F> Future for Inspect<Fut, F> where F: FnOnce(&<Fut as Future>::Output), Fut: Future, type Output = <Fut as Future>::Output;fn inspect<F>(self, f: F) -> Inspect<Self, F> where F: FnOnce(&Self::Output), [src][−]

Important traits for Inspect<Fut, F>

ⓘImportant traits for UnitError<Fut>Important traits for UnitError<Fut>impl<Fut, T> Future for UnitError<Fut> where Fut: Future<Output = T>, type Output = Result<T, ()>;fn unit_error(self) -> UnitError<Self>[src][−]

Important traits for UnitError<Fut>

ⓘImportant traits for NeverError<Fut>Important traits for NeverError<Fut>impl<Fut, T> Future for NeverError<Fut> where Fut: Future<Output = T>, type Output = Result<T, Infallible>;fn never_error(self) -> NeverError<Self>[src][−]

Important traits for NeverError<Fut>

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<A, B> FusedFuture for Select<A, B> where A: Future + Unpin, B: Future + Unpin,` [src][+]

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

`impl<A, B> Future for Select<A, B> where A: Future + Unpin, B: Future + Unpin,` [src][+]

`type Output = Either<(<A as Future>::Output, B), (<B as Future>::Output, A)>`

`fn poll( self: Pin<&mut Select<A, B>>, cx: &mut Context ) -> Poll<<Select<A, B> as Future>::Output>`[src][−]

`impl<A, B> Debug for Select<A, B> where A: Debug, B: Debug,` [src][+]

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

`impl<A, B> Unpin for Select<A, B> where A: Unpin, B: Unpin,` [src]

`impl<A, B> Send for Select<A, B> where A: Send, B: Send,`

`impl<A, B> Sync for Select<A, B> where A: Sync, B: Sync,`

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

`fn from(t: T) -> T`[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<T, U> Into<U> for T where U: From<T>,` [src][+]

`fn into(self) -> U`[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<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> Any for T where T: 'static + ?Sized,` [src][+]

`fn type_id(&self) -> TypeId`[src][−]

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

ⓘImportant traits for Map<Fut, F>
Important traits for Map<Fut, F>
`impl<Fut, F, T> Future for Map<Fut, F> where F: FnOnce(<Fut as Future>::Output) -> T, Fut: Future, type Output = T;`
`fn map<U, F>(self, f: F) -> Map<Self, F> where F: FnOnce(Self::Output) -> U,` [src][−]

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

ⓘImportant traits for Flatten<Fut>
Important traits for Flatten<Fut>
`impl<Fut> Future for Flatten<Fut> where Fut: Future, <Fut as Future>::Output: Future, type Output = <<Fut as Future>::Output as Future>::Output;`
`fn flatten(self) -> Flatten<Self> where Self::Output: Future,` [src][−]

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

ⓘImportant traits for Fuse<Fut>
Important traits for Fuse<Fut>
`impl<Fut> Future for Fuse<Fut> where Fut: Future, type Output = <Fut as Future>::Output;`
`fn fuse(self) -> Fuse<Self>`[src][−]

ⓘImportant traits for UnitError<Fut>
Important traits for UnitError<Fut>
`impl<Fut, T> Future for UnitError<Fut> where Fut: Future<Output = T>, type Output = Result<T, ()>;`
`fn unit_error(self) -> UnitError<Self>`[src][−]

ⓘImportant traits for NeverError<Fut>
Important traits for NeverError<Fut>
`impl<Fut, T> Future for NeverError<Fut> where Fut: Future<Output = T>, type Output = Result<T, Infallible>;`
`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][−]