Struct futures_util::future::LocalFutureObj [−][src]
A custom trait object for polling futures, roughly akin to
Box<dyn Future<Output = T> + '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.
Implementations
impl<'a, T> LocalFutureObj<'a, T>
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pub fn new<F>(f: F) -> LocalFutureObj<'a, T>ⓘNotable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
where
F: 'a + UnsafeFutureObj<'a, T>,
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Notable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
F: 'a + UnsafeFutureObj<'a, T>,
Create a LocalFutureObj
from a custom trait object representation.
pub unsafe fn into_future_obj(self) -> FutureObj<'a, T>ⓘ
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Converts the LocalFutureObj
into a FutureObj
.
Safety
To make this operation safe one has to ensure that the UnsafeFutureObj
instance from which this LocalFutureObj
was created actually
implements Send
.
Trait Implementations
impl<'_, T> Debug for LocalFutureObj<'_, T>
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impl<'_, T> Drop for LocalFutureObj<'_, T>
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impl<'a, F> From<Box<F, Global>> for LocalFutureObj<'a, ()> where
F: 'a + Future<Output = ()>,
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F: 'a + Future<Output = ()>,
pub fn from(boxed: Box<F, Global>) -> LocalFutureObj<'a, ()>ⓘNotable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
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Notable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
impl<'a> From<Box<dyn Future<Output = ()> + 'a, Global>> for LocalFutureObj<'a, ()>
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pub fn from(
boxed: Box<dyn Future<Output = ()> + 'a, Global>
) -> LocalFutureObj<'a, ()>ⓘNotable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
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boxed: Box<dyn Future<Output = ()> + 'a, Global>
) -> LocalFutureObj<'a, ()>ⓘ
Notable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
impl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>
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pub fn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>ⓘNotable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
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Notable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
impl<'a, F> From<Pin<Box<F, Global>>> for LocalFutureObj<'a, ()> where
F: 'a + Future<Output = ()>,
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F: 'a + Future<Output = ()>,
pub fn from(boxed: Pin<Box<F, Global>>) -> LocalFutureObj<'a, ()>ⓘNotable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
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Notable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
impl<'a> From<Pin<Box<dyn Future<Output = ()> + 'a, Global>>> for LocalFutureObj<'a, ()>
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pub fn from(
boxed: Pin<Box<dyn Future<Output = ()> + 'a, Global>>
) -> LocalFutureObj<'a, ()>ⓘNotable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
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boxed: Pin<Box<dyn Future<Output = ()> + 'a, Global>>
) -> LocalFutureObj<'a, ()>ⓘ
Notable traits for LocalFutureObj<'_, T>
impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
impl<'_, T> Future for LocalFutureObj<'_, T>
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type Output = T
The type of value produced on completion.
pub fn poll(
self: Pin<&mut LocalFutureObj<'_, T>>,
cx: &mut Context<'_>
) -> Poll<T>
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self: Pin<&mut LocalFutureObj<'_, T>>,
cx: &mut Context<'_>
) -> Poll<T>
impl<'_, T> Unpin for LocalFutureObj<'_, T>
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Auto Trait Implementations
impl<'a, T> !Send for LocalFutureObj<'a, T>
impl<'a, T> !Sync for LocalFutureObj<'a, T>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<F> IntoFuture for F where
F: Future,
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F: Future,
type Output = <F as Future>::Output
into_future
)The output that the future will produce on completion.
type Future = F
into_future
)Which kind of future are we turning this into?
pub fn into_future(self) -> <F as IntoFuture>::Future
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<F, T, E> TryFuture for F where
F: Future<Output = Result<T, E>> + ?Sized,
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F: Future<Output = Result<T, E>> + ?Sized,
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>
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self: Pin<&mut F>,
cx: &mut Context<'_>
) -> Poll<<F as Future>::Output>
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,