[][src]Struct futures::future::Lazy

#[must_use = "futures do nothing unless polled"]
pub struct Lazy<F, R: IntoFuture> { /* fields omitted */ }

A future which defers creation of the actual future until a callback is scheduled.

This is created by the lazy function.

Trait Implementations

impl<F, R> Future for Lazy<F, R> where
    F: FnOnce() -> R,
    R: IntoFuture

type Item = R::Item

The type of value that this future will resolved with if it is successful. Read more

type Error = R::Error

The type of error that this future will resolve with if it fails in a normal fashion. Read more

impl<F: Debug, R: Debug + IntoFuture> Debug for Lazy<F, R> where
    R::Future: Debug

Auto Trait Implementations

impl<F, R> Unpin for Lazy<F, R> where
    F: Unpin,
    <R as IntoFuture>::Future: Unpin

impl<F, R> Send for Lazy<F, R> where
    F: Send,
    <R as IntoFuture>::Future: Send

impl<F, R> Sync for Lazy<F, R> where
    F: Sync,
    <R as IntoFuture>::Future: Sync

impl<F, R> UnwindSafe for Lazy<F, R> where
    F: UnwindSafe,
    <R as IntoFuture>::Future: UnwindSafe

impl<F, R> RefUnwindSafe for Lazy<F, R> where
    F: RefUnwindSafe,
    <R as IntoFuture>::Future: RefUnwindSafe

Blanket Implementations

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.

impl<T> From<T> for T[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> Any for T where
    T: 'static + ?Sized