[−][src]Struct futures_core::future::FutureOption
A future representing a value which may or may not be present.
Created by the IntoFuture implementation for std::option::Option.
Trait Implementations
impl<F, T, E> Future for FutureOption<F> where
F: Future<Item = T, Error = E>, [src]
impl<F, T, E> Future for FutureOption<F> where
F: Future<Item = T, Error = E>, type Item = Option<T>
A successful value
type Error = E
An error
fn poll(&mut self, cx: &mut Context) -> Poll<Option<T>, E>[src]
fn poll(&mut self, cx: &mut Context) -> Poll<Option<T>, E>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<T: Debug> Debug for FutureOption<T>[src]
impl<T: Debug> Debug for FutureOption<T>fn fmt(&self, f: &mut Formatter) -> Result[src]
fn fmt(&self, f: &mut Formatter) -> ResultFormats the value using the given formatter. Read more
impl<T> From<Option<T>> for FutureOption<T>[src]
impl<T> From<Option<T>> for FutureOption<T>impl<T: Clone> Clone for FutureOption<T>[src]
impl<T: Clone> Clone for FutureOption<T>fn clone(&self) -> FutureOption<T>[src]
fn clone(&self) -> FutureOption<T>Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0[src]
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
Auto Trait Implementations
impl<T> Send for FutureOption<T> where
T: Send,
impl<T> Send for FutureOption<T> where
T: Send, impl<T> Sync for FutureOption<T> where
T: Sync,
impl<T> Sync for FutureOption<T> where
T: Sync, Blanket Implementations
impl<F> IntoFuture for F where
F: Future, [src]
impl<F> IntoFuture for F where
F: Future, type Future = F
The future that this type can be converted into.
type Item = <F as Future>::Item
The item that the future may resolve with.
type Error = <F as Future>::Error
The error that the future may resolve with.
fn into_future(Self) -> F[src]
fn into_future(Self) -> FConsumes this object and produces a future.
impl<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> From for T[src]
impl<T> From for Timpl<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, impl<T> BorrowMut for T where
T: ?Sized, [src]
impl<T> BorrowMut for T where
T: ?Sized, fn 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
impl<T> ToOwned for T where
T: Clone, [src]
impl<T> ToOwned for T where
T: Clone, type Owned = T
fn to_owned(&self) -> T[src]
fn to_owned(&self) -> TCreates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)[src]
fn clone_into(&self, target: &mut T)🔬 This is a nightly-only experimental API. (toowned_clone_into)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more