Struct futures_util::stream::Fold

#[must_use = "streams do nothing unless polled"]
pub struct Fold<S, Fut, T, F> where
    Fut: IntoFuture,  { /* fields omitted */ }

A future used to collect all the results of a stream into one generic type.

This future is returned by the Stream::fold method.

Trait Implementations

impl<S: Debug, Fut: Debug, T: Debug, F: Debug> Debug for Fold<S, Fut, T, F> where
    Fut: IntoFuture,
    Fut::Future: Debug, 

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<S, Fut, T, F> Future for Fold<S, Fut, T, F> where
    S: Stream,
    F: FnMut(T, S::Item) -> Fut,
    Fut: IntoFuture<Item = T, Error = S::Error>, 

type Item = T

A successful value

type Error = S::Error

An error

fn poll(&mut self, cx: &mut Context) -> Poll<T, S::Error>

Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.