Struct Strawpoll

pub struct Strawpoll<F> { /* private fields */ }

Polling wrapper that avoids spurious calls to poll on F.

Implementations

impl<F> Strawpoll<F>

pub fn new(f: F) -> Self

Wrap f to avoid spurious polling on it.

pub fn poll_fn<P, R>( self: Pin<&mut Self>, cx: &mut Context<'_>, poll_fn: P, ) -> Poll<R>

where P: FnMut(Pin<&mut F>, &mut Context<'_>) -> Poll<R>,

Call poll_fn with F pinned only if F really needs to be polled.

Specifically, poll_fn will only be called if:

• F has never been polled; or
• cx contains a new waker; or
• F was woken up.

Trait Implementations

impl<F: Debug> Debug for Strawpoll<F>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<F> Deref for Strawpoll<F>

type Target = F

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<F> DerefMut for Strawpoll<F>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<F> From<F> for Strawpoll<F>

fn from(f: F) -> Self

Converts to this type from the input type.

impl<F> Future for Strawpoll<F>

where F: Future,

type Output = <F as Future>::Output

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

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

impl<S> Stream for Strawpoll<S>

where S: Stream,

Available on crate feature stream only.

type Item = <S as Stream>::Item

Values yielded by the stream.

fn poll_next( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Option<Self::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted.

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream.

impl<F> Unpin for Strawpoll<F>

where F: Unpin,