Struct futures::future::Fuse
[−]
[src]
#[must_use = "futures do nothing unless polled"]pub struct Fuse<A> where
A: Future, { /* fields omitted */ }
A future which "fuses" a future once it's been resolved.
Normally futures can behave unpredictable once they're used after a future
has been resolved, but Fuse is always defined to return Async::Pending
from poll after it has resolved successfully or returned an error.
This is created by the Future::fuse method.
Trait Implementations
impl<A> Debug for Fuse<A> where
A: Debug + Future, [src]
A: Debug + Future,
fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>[src]
Formats the value using the given formatter. Read more
impl<A> Future for Fuse<A> where
A: Future, [src]
A: Future,
type Item = <A as Future>::Item
A successful value
type Error = <A as Future>::Error
An error
fn poll(
&mut self,
cx: &mut Context
) -> Result<Async<<A as Future>::Item>, <A as Future>::Error>[src]
&mut self,
cx: &mut Context
) -> Result<Async<<A as Future>::Item>, <A as Future>::Error>
Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more