Struct futures_util::future::FutureObj
source · [−]pub struct FutureObj<'a, T>(_);
Expand description
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
Trait Implementations
sourceimpl<'a, F> From<Box<F, Global>> for FutureObj<'a, ()> where
F: 'a + Future<Output = ()> + Send,
impl<'a, F> From<Box<F, Global>> for FutureObj<'a, ()> where
F: 'a + Future<Output = ()> + Send,
sourceimpl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>
impl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>
sourcefn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>ⓘNotable traits for LocalFutureObj<'_, T>impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
fn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>ⓘNotable traits for LocalFutureObj<'_, T>impl<'_, T> Future for LocalFutureObj<'_, T> type Output = T;
Converts to this type from the input type.
sourceimpl<'a, F> From<Pin<Box<F, Global>>> for FutureObj<'a, ()> where
F: 'a + Future<Output = ()> + Send,
impl<'a, F> From<Pin<Box<F, Global>>> for FutureObj<'a, ()> where
F: 'a + Future<Output = ()> + Send,
impl<'_, T> Send for FutureObj<'_, T>
impl<'_, T> Unpin for FutureObj<'_, T>
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
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<F> IntoFuture for F where
F: Future,
impl<F> IntoFuture for F where
F: Future,
type Output = <F as Future>::Output
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 IntoFuture = F
type IntoFuture = F
🔬 This is a nightly-only experimental API. (
into_future
)Which kind of future are we turning this into?
sourcefn into_future(self) -> <F as IntoFuture>::IntoFuture
fn into_future(self) -> <F as IntoFuture>::IntoFuture
🔬 This is a nightly-only experimental API. (
into_future
)Creates a future from a value.