Struct futures_core::future::LocalFutureObj [−][src]
pub struct LocalFutureObj<'a, T> { /* fields omitted */ }🔬 This is a nightly-only experimental API. (futures_api)
futures in libcore are unstable
A custom trait object for polling futures, roughly akin to
Box<dyn Future<Output = T> + 'a>.
This custom trait object was introduced for two reasons:
- Currently it is not possible to take
dyn Traitby value andBox<dyn Trait>is not available in no_std contexts. - The
Futuretrait is currently not object safe: TheFuture::pollmethod makes uses the arbitrary self types feature and traits in which this feature is used are currently not object safe due to current compiler limitations. (See tracking issue for arbitray self types for more information #44874)
Methods
impl<'a, T> LocalFutureObj<'a, T>[src]
impl<'a, T> LocalFutureObj<'a, T>pub fn new<F>(f: F) -> LocalFutureObj<'a, T> where
F: 'a + UnsafeFutureObj<'a, T>, [src]
pub fn new<F>(f: F) -> LocalFutureObj<'a, T> where
F: 'a + UnsafeFutureObj<'a, T>, 🔬 This is a nightly-only experimental API. (futures_api)
futures in libcore are unstable
Create a LocalFutureObj from a custom trait object representation.
pub unsafe fn into_future_obj(self) -> FutureObj<'a, T>[src]
pub unsafe fn into_future_obj(self) -> FutureObj<'a, T>🔬 This is a nightly-only experimental API. (futures_api)
futures in libcore are unstable
Converts the LocalFutureObj into a FutureObj
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<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>[src]
impl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>fn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>[src]
fn from(f: FutureObj<'a, T>) -> LocalFutureObj<'a, T>Performs the conversion.
impl<'a, T> Debug for LocalFutureObj<'a, T>[src]
impl<'a, T> Debug for LocalFutureObj<'a, T>fn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter. Read more
impl<'a, T> Drop for LocalFutureObj<'a, T>[src]
impl<'a, T> Drop for LocalFutureObj<'a, T>impl<'a, T> Future for LocalFutureObj<'a, T>[src]
impl<'a, T> Future for LocalFutureObj<'a, T>type Output = T
🔬 This is a nightly-only experimental API. (futures_api)
futures in libcore are unstable
The result of the Future.
fn poll(self: PinMut<LocalFutureObj<'a, T>>, cx: &mut Context) -> Poll<T>[src]
fn poll(self: PinMut<LocalFutureObj<'a, T>>, cx: &mut Context) -> Poll<T>🔬 This is a nightly-only experimental API. (futures_api)
futures in libcore are unstable
Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more
impl<'a, F> From<PinBox<F>> for LocalFutureObj<'a, ()> where
F: 'a + Future<Output = ()>, [src]
impl<'a, F> From<PinBox<F>> for LocalFutureObj<'a, ()> where
F: 'a + Future<Output = ()>, fn from(boxed: PinBox<F>) -> LocalFutureObj<'a, ()>[src]
fn from(boxed: PinBox<F>) -> LocalFutureObj<'a, ()>Performs the conversion.
impl<'a, F> From<Box<F>> for LocalFutureObj<'a, ()> where
F: 'a + Future<Output = ()>, [src]
impl<'a, F> From<Box<F>> for LocalFutureObj<'a, ()> where
F: 'a + Future<Output = ()>, fn from(boxed: Box<F>) -> LocalFutureObj<'a, ()>[src]
fn from(boxed: Box<F>) -> LocalFutureObj<'a, ()>Performs the conversion.
Auto Trait Implementations
impl<'a, T> !Send for LocalFutureObj<'a, T>
impl<'a, T> !Send for LocalFutureObj<'a, T>impl<'a, T> !Sync for LocalFutureObj<'a, T>
impl<'a, T> !Sync for LocalFutureObj<'a, T>Blanket Implementations
impl<F, T, E> TryFuture for F where
F: Future<Output = Result<T, E>>, [src]
impl<F, T, E> TryFuture for F where
F: Future<Output = Result<T, E>>, 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(PinMut<F>, &mut Context) -> Poll<<F as Future>::Output>[src]
fn try_poll(PinMut<F>, &mut Context) -> Poll<<F as Future>::Output>Poll this TryFuture as if it were a Future. Read more
impl<T> From for T[src]
impl<T> From for Timpl<T, U> TryFrom for T where
T: From<U>, [src]
impl<T, U> TryFrom for T where
T: From<U>, type Error = !
try_from)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>try_from)Performs the conversion.
impl<T, U> TryInto for T where
U: TryFrom<T>, [src]
impl<T, U> TryInto for T where
U: TryFrom<T>, type Error = <U as TryFrom<T>>::Error
try_from)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>try_from)Performs the conversion.
impl<T, U> Into for T where
U: From<T>, [src]
impl<T, U> Into for T where
U: From<T>, impl<T> Borrow for T where
T: ?Sized, [src]
impl<T> Borrow for T where
T: ?Sized, ⓘImportant traits for &'a mut Ifn borrow(&self) -> &T[src]
fn borrow(&self) -> &TImmutably borrows from an owned value. Read more
impl<T> BorrowMut for T where
T: ?Sized, [src]
impl<T> BorrowMut for T where
T: ?Sized, ⓘImportant traits for &'a mut Ifn borrow_mut(&mut self) -> &mut T[src]
fn borrow_mut(&mut self) -> &mut TMutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> Any for T where
T: 'static + ?Sized, fn get_type_id(&self) -> TypeId[src]
fn get_type_id(&self) -> TypeId🔬 This is a nightly-only experimental API. (get_type_id)
this method will likely be replaced by an associated static
Gets the TypeId of self. Read more