Struct futures_util::stream::Peek

#[must_use = "futures do nothing unless polled"]pub struct Peek<'a, St: Stream> { /* fields omitted */ }

Future for the Peekable::peek() function from Peekable

Trait Implementations

impl<St, '_> Debug for Peek<'_, St> where
    St: Stream + Debug,
    St::Item: Debug, 

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

Formats the value using the given formatter.

impl<St: Stream, '_> FusedFuture for Peek<'_, St>

fn is_terminated(&self) -> bool

Returns true if the underlying future should no longer be polled.

impl<'a, St> Future for Peek<'a, St> where
    St: Stream, 

type Output = Option<&'a St::Item>

The type of value produced on completion.

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

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

impl<'a, St: Stream> PinnedDrop for Peek<'a, St>

unsafe fn drop(self: Pin<&mut Self>)

impl<'pin, 'a, St: Stream> Unpin for Peek<'a, St> where
    __Peek<'pin, 'a, St>: Unpin, 

impl<'a, St: Stream> UnsafeUnpin for Peek<'a, St>