Struct ReusableBoxFuture
pub struct ReusableBoxFuture<'a, T> { /* private fields */ }A reusable Pin<Box<dyn Future<Output = T> + Send + 'a>>.
This type lets you replace the future stored in the box without reallocating when the size and alignment permits this.
Implementations
impl<'a, T> ReusableBoxFuture<'a, T>
fn new<F>(future: F) -> Self where F: Future<Output = T> + Send + 'a,Create a new
ReusableBoxFuture<T>containing the provided future.fn set<F>(&mut self, future: F) where F: Future<Output = T> + Send + 'a,Replace the future currently stored in this box.
This reallocates if and only if the layout of the provided future is different from the layout of the currently stored future.
fn try_set<F>(&mut self, future: F) -> Result<(), F> where F: Future<Output = T> + Send + 'a,Replace the future currently stored in this box.
This function never reallocates, but returns an error if the provided future has a different size or alignment from the currently stored future.
fn get_pin(&mut self) -> Pin<&mut dyn Future<Output = T> + Send>Get a pinned reference to the underlying future.
fn poll(&mut self, cx: &mut Context<'_>) -> Poll<T>Poll the future stored inside this box.
Trait Implementations
impl<T> Debug for ReusableBoxFuture<'_, T>
fn fmt(&self, f: &mut Formatter<'_>) -> Result
impl<T> Future for ReusableBoxFuture<'_, T>
type Output = T;fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<T>Poll the future stored inside this box.
impl<T> Sync for ReusableBoxFuture<'_, T>
Auto Trait Implementations
impl<'a, T> !RefUnwindSafe for ReusableBoxFuture<'a, T>
impl<'a, T> !UnwindSafe for ReusableBoxFuture<'a, T>
impl<'a, T> Freeze for ReusableBoxFuture<'a, T>
where
Pin<Box<dyn Future<Output = T> + Send + 'a>>: Freeze,
impl<'a, T> Send for ReusableBoxFuture<'a, T>
where
Pin<Box<dyn Future<Output = T> + Send + 'a>>: Send,
impl<'a, T> Unpin for ReusableBoxFuture<'a, T>
where
Pin<Box<dyn Future<Output = T> + Send + 'a>>: Unpin,
impl<'a, T> UnsafeUnpin for ReusableBoxFuture<'a, T>
where
Pin<Box<dyn Future<Output = T> + Send + 'a>>: UnsafeUnpin,
Blanket Implementations
impl<F> IntoFuture for ReusableBoxFuture<'a, T>
where
F: Future,
type Output = <F as Future>::Output;type IntoFuture = F;fn into_future(self) -> <F as IntoFuture>::IntoFuture
impl<F, T, E> TryFuture for ReusableBoxFuture<'a, T>
where
F: Future<Output = Result<T, E>> + ?Sized,
type Ok = T;type Error = E;fn try_poll(self: Pin<&mut F>, cx: &mut Context<'_>) -> Poll<<F as Future>::Output>
impl<T> Any for ReusableBoxFuture<'a, T>
where
T: 'static + ?Sized,
fn type_id(&self) -> TypeId
impl<T> Borrow<T> for ReusableBoxFuture<'a, T>
where
T: ?Sized,
fn borrow(&self) -> &T
impl<T> BorrowMut<T> for ReusableBoxFuture<'a, T>
where
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
impl<T> From<T> for ReusableBoxFuture<'a, T>
fn from(t: T) -> TReturns the argument unchanged.
impl<T> FutureExt for ReusableBoxFuture<'a, T>
where
T: Future + ?Sized,
impl<T, U> Into<U> for ReusableBoxFuture<'a, T>
where
U: From<T>,
fn into(self) -> UCalls
U::from(self).That is, this conversion is whatever the implementation of
[From]<T> for Uchooses to do.
impl<T, U> TryFrom<U> for ReusableBoxFuture<'a, T>
where
U: Into<T>,
type Error = Infallible;fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
impl<T, U> TryInto<U> for ReusableBoxFuture<'a, T>
where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error;fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>