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

#[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: Debug, R: Debug + IntoFuture> Debug for Lazy<F, R> where
    R::Future: Debug
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Formats the value using the given formatter.

impl<F, R> Future for Lazy<F, R> where
    F: FnOnce() -> R,
    R: IntoFuture
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The type of value that this future will resolved with if it is successful. Read more

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

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Query this future to see if its value has become available, registering interest if it is not. Read more

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Block the current thread until this future is resolved. Read more

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Map this future's result to a different type, returning a new future of the resulting type. Read more

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Map this future's error to a different error, returning a new future. Read more

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Map this future's error to any error implementing From for this future's Error, returning a new future. Read more

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Chain on a computation for when a future finished, passing the result of the future to the provided closure f. Read more

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Execute another future after this one has resolved successfully. Read more

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Execute another future if this one resolves with an error. Read more

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Waits for either one of two futures to complete. Read more

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Waits for either one of two differently-typed futures to complete. Read more

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Joins the result of two futures, waiting for them both to complete. Read more

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Same as join, but with more futures.

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Same as join, but with more futures.

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Same as join, but with more futures.

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Convert this future into a single element stream. Read more

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Flatten the execution of this future when the successful result of this future is itself another future. Read more

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Flatten the execution of this future when the successful result of this future is a stream. Read more

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Fuse a future such that poll will never again be called once it has completed. Read more

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Do something with the item of a future, passing it on. Read more

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Catches unwinding panics while polling the future. Read more

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Create a cloneable handle to this future where all handles will resolve to the same result. Read more