Struct futures_util::task::FutureObj[−][src]

pub struct FutureObj<'a, T>(_);

A custom trait object for polling futures, roughly akin to Box<dyn Future<Output = T> + Send + 'a>.

This custom trait object was introduced as currently it is not possible to take dyn Trait by value and Box<dyn Trait> is not available in no_std contexts.

You should generally not need to use this type outside of no_std or when implementing Spawn, consider using BoxFuture instead.

Implementations

`impl<'a, T> FutureObj<'a, T>`[src]

`pub fn new<F>(f: F) -> FutureObj<'a, T>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T; where F: UnsafeFutureObj<'a, T> + Send,` [src]

Create a FutureObj from a custom trait object representation.

Trait Implementations

`impl<'_, T> Debug for FutureObj<'_, T>`[src]

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

`impl<'a, F> From<Box<F, Global>> for FutureObj<'a, ()> where F: 'a + Future<Output = ()> + Send,` [src]

`pub fn from(boxed: Box<F, Global>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'a> From<Box<dyn Future<Output = ()> + 'a + Send, Global>> for FutureObj<'a, ()>`[src]

`pub fn from( boxed: Box<dyn Future<Output = ()> + 'a + Send, Global> ) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>`[src]

`pub fn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>ⓘNotable traits for LocalFutureObj<'_, T> impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;`[src]

`impl<'a, F> From<Pin<Box<F, Global>>> for FutureObj<'a, ()> where F: 'a + Future<Output = ()> + Send,` [src]

`pub fn from(boxed: Pin<Box<F, Global>>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'a> From<Pin<Box<dyn Future<Output = ()> + 'a + Send, Global>>> for FutureObj<'a, ()>`[src]

`pub fn from( boxed: Pin<Box<dyn Future<Output = ()> + 'a + Send, Global>> ) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'_, T> Future for FutureObj<'_, T>`[src]

`type Output = T`

The type of value produced on completion.

`pub fn poll(self: Pin<&mut FutureObj<'_, T>>, cx: &mut Context<'_>) -> Poll<T>`[src]

`impl<'_, T> Send for FutureObj<'_, T>`[src]

`impl<'_, T> Unpin for FutureObj<'_, T>`[src]

Auto Trait Implementations

`impl<'a, T> !RefUnwindSafe for FutureObj<'a, T>`

`impl<'a, T> !Sync for FutureObj<'a, T>`

`impl<'a, T> !UnwindSafe for FutureObj<'a, T>`

Blanket Implementations

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

`pub fn type_id(&self) -> TypeId`[src]

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

`pub fn borrow(&self) -> &T`[src]

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

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

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

`pub fn from(t: T) -> T`[src]

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

`pub fn into(self) -> U`[src]

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

`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?

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

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

`type Error = Infallible`

The type returned in the event of a conversion error.

`pub 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]

`type Ok = T`

The type of successful values yielded by this future

`type Error = E`

The type of failures yielded by this future

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

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

`type Error = >::Error`

The type returned in the event of a conversion error.

Struct futures_util::task::FutureObj⎘[−][src]

Implementations

impl<'a, T> FutureObj<'a, T>[src]

pub fn new<F>(f: F) -> FutureObj<'a, T>ⓘNotable traits for FutureObj<'_, T>impl<'_, T> Future for FutureObj<'_, T> type Output = T; where F: UnsafeFutureObj<'a, T> + Send, [src]

Notable traits for FutureObj<'_, T>

Trait Implementations

impl<'_, T> Debug for FutureObj<'_, T>[src]

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

impl<'a, F> From<Box<F, Global>> for FutureObj<'a, ()> where F: 'a + Future<Output = ()> + Send, [src]

pub fn from(boxed: Box<F, Global>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T>impl<'_, T> Future for FutureObj<'_, T> type Output = T;[src]

Notable traits for FutureObj<'_, T>

impl<'a> From<Box<dyn Future<Output = ()> + 'a + Send, Global>> for FutureObj<'a, ()>[src]

pub fn from( boxed: Box<dyn Future<Output = ()> + 'a + Send, Global>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T>impl<'_, T> Future for FutureObj<'_, T> type Output = T;[src]

Notable traits for FutureObj<'_, T>

impl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>[src]

pub fn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>ⓘNotable traits for LocalFutureObj<'_, T>impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;[src]

Notable traits for LocalFutureObj<'_, T>

impl<'a, F> From<Pin<Box<F, Global>>> for FutureObj<'a, ()> where F: 'a + Future<Output = ()> + Send, [src]

pub fn from(boxed: Pin<Box<F, Global>>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T>impl<'_, T> Future for FutureObj<'_, T> type Output = T;[src]

Notable traits for FutureObj<'_, T>

impl<'a> From<Pin<Box<dyn Future<Output = ()> + 'a + Send, Global>>> for FutureObj<'a, ()>[src]

pub fn from( boxed: Pin<Box<dyn Future<Output = ()> + 'a + Send, Global>>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T>impl<'_, T> Future for FutureObj<'_, T> type Output = T;[src]

Notable traits for FutureObj<'_, T>

impl<'_, T> Future for FutureObj<'_, T>[src]

type Output = T

pub fn poll(self: Pin<&mut FutureObj<'_, T>>, cx: &mut Context<'_>) -> Poll<T>[src]

impl<'_, T> Send for FutureObj<'_, T>[src]

impl<'_, T> Unpin for FutureObj<'_, T>[src]

Auto Trait Implementations

impl<'a, T> !RefUnwindSafe for FutureObj<'a, T>

impl<'a, T> !Sync for FutureObj<'a, T>

impl<'a, T> !UnwindSafe for FutureObj<'a, T>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

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

pub fn borrow(&self) -> &T[src]

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

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

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

pub fn from(t: T) -> T[src]

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

pub fn into(self) -> U[src]

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

type Output = <F as Future>::Output

type Future = F

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

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

type Error = Infallible

pub 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

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

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

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

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

Struct futures_util::task::FutureObj[−][src]

`impl<'a, T> FutureObj<'a, T>`[src]

`pub fn new<F>(f: F) -> FutureObj<'a, T>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T; where F: UnsafeFutureObj<'a, T> + Send,` [src]

`impl<'_, T> Debug for FutureObj<'_, T>`[src]

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

`impl<'a, F> From<Box<F, Global>> for FutureObj<'a, ()> where F: 'a + Future<Output = ()> + Send,` [src]

`pub fn from(boxed: Box<F, Global>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'a> From<Box<dyn Future<Output = ()> + 'a + Send, Global>> for FutureObj<'a, ()>`[src]

`pub fn from( boxed: Box<dyn Future<Output = ()> + 'a + Send, Global> ) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>`[src]

`pub fn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>ⓘNotable traits for LocalFutureObj<'_, T> impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;`[src]

`impl<'a, F> From<Pin<Box<F, Global>>> for FutureObj<'a, ()> where F: 'a + Future<Output = ()> + Send,` [src]

`pub fn from(boxed: Pin<Box<F, Global>>) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'a> From<Pin<Box<dyn Future<Output = ()> + 'a + Send, Global>>> for FutureObj<'a, ()>`[src]

`pub fn from( boxed: Pin<Box<dyn Future<Output = ()> + 'a + Send, Global>> ) -> FutureObj<'a, ()>ⓘNotable traits for FutureObj<'_, T> impl<'_, T> Future for FutureObj<'_, T> type Output = T;`[src]

`impl<'_, T> Future for FutureObj<'_, T>`[src]

`type Output = T`

`pub fn poll(self: Pin<&mut FutureObj<'_, T>>, cx: &mut Context<'_>) -> Poll<T>`[src]

`impl<'_, T> Send for FutureObj<'_, T>`[src]

`impl<'_, T> Unpin for FutureObj<'_, T>`[src]

`impl<'a, T> !RefUnwindSafe for FutureObj<'a, T>`

`impl<'a, T> !Sync for FutureObj<'a, T>`

`impl<'a, T> !UnwindSafe for FutureObj<'a, T>`

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

`pub fn type_id(&self) -> TypeId`[src]

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

`pub fn borrow(&self) -> &T`[src]

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

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

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

`pub fn from(t: T) -> T`[src]

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

`pub fn into(self) -> U`[src]

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

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

`type Future = F`

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

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

`type Error = Infallible`

`pub 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`

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

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

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

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