[−][src]Trait ready::Ready
Determine if a struct is ready to yield futures.
This is useful when a Stream
borrows an internal struct, and the internal
struct is in charge of establishing the io channel. That way the stream and
the readiness can be decoupled.
Once the IO channel is ready, poll_ready
should always return
Poll::Ready
.
Associated Types
type Ok
The type of successful values yielded by this trait.
type Err: Error + Send + Sync
The type of failures yielded by this trait.
Required methods
fn poll_ready(&mut self, waker: &Waker) -> Poll<Result<Self::Ok, Self::Err>>
Check if the stream can be read from.