Struct Scan
#[must_use = "streams do nothing unless polled"]
pub struct Scan<St: Stream, S, Fut, F> { /* private fields */ }Stream for the scan method.
Implementations
impl<B, St, S, Fut, F> Scan<St, S, Fut, F>
where
St: Stream,
F: FnMut(&mut S, St::Item) -> Fut,
Fut: Future<Output = Option<B>>,
fn get_ref(&self) -> &StAcquires a reference to the underlying sink or stream that this combinator is pulling from.
fn get_mut(&mut self) -> &mut StAcquires a mutable reference to the underlying sink or stream that this combinator is pulling from.
Note that care must be taken to avoid tampering with the state of the sink or stream which may otherwise confuse this combinator.
fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut St>Acquires a pinned mutable reference to the underlying sink or stream that this combinator is pulling from.
Note that care must be taken to avoid tampering with the state of the sink or stream which may otherwise confuse this combinator.
fn into_inner(self) -> StConsumes this combinator, returning the underlying sink or stream.
Note that this may discard intermediate state of this combinator, so care should be taken to avoid losing resources when this is called.
Trait Implementations
impl<'__pin, St: Stream, S, Fut, F> Unpin for Scan<St, S, Fut, F>
where
PinnedFieldsOf<__Origin<'__pin, St, S, Fut, F>>: Unpin,
impl<B, St, S, Fut, F> FusedStream for Scan<St, S, Fut, F>
where
St: FusedStream,
F: FnMut(&mut S, St::Item) -> Fut,
Fut: Future<Output = Option<B>>,
fn is_terminated(&self) -> bool
impl<B, St, S, Fut, F> Stream for Scan<St, S, Fut, F>
where
St: Stream,
F: FnMut(&mut S, St::Item) -> Fut,
Fut: Future<Output = Option<B>>,
type Item = B;fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<B>>fn size_hint(&self) -> (usize, Option<usize>)
impl<St, S, Fut, F> Debug for Scan<St, S, Fut, F>
where
St: Stream + Debug,
St::Item: Debug,
S: Debug,
Fut: Debug,
fn fmt(&self, f: &mut Formatter<'_>) -> Result
impl<St, S, Fut, F, Item> Sink<Item> for Scan<St, S, Fut, F>
where
St: Stream + Sink<Item>,
type Error = <St as Sink<Item>>::Error;fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>fn start_send(self: Pin<&mut Self>, item: Item) -> Result<(), Self::Error>fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>
Auto Trait Implementations
impl<St, S, Fut, F> Freeze for Scan<St, S, Fut, F>
where
St: Freeze,
Option<StateFn<S, F>>: Freeze,
Option<Fut>: Freeze,
impl<St, S, Fut, F> RefUnwindSafe for Scan<St, S, Fut, F>
where
St: RefUnwindSafe,
Option<StateFn<S, F>>: RefUnwindSafe,
Option<Fut>: RefUnwindSafe,
impl<St, S, Fut, F> Send for Scan<St, S, Fut, F>
where
St: Send,
Option<StateFn<S, F>>: Send,
Option<Fut>: Send,
impl<St, S, Fut, F> Sync for Scan<St, S, Fut, F>
where
St: Sync,
Option<StateFn<S, F>>: Sync,
Option<Fut>: Sync,
impl<St, S, Fut, F> UnsafeUnpin for Scan<St, S, Fut, F>
where
St: UnsafeUnpin,
Option<StateFn<S, F>>: UnsafeUnpin,
Option<Fut>: UnsafeUnpin,
impl<St, S, Fut, F> UnwindSafe for Scan<St, S, Fut, F>
where
St: UnwindSafe,
Option<StateFn<S, F>>: UnwindSafe,
Option<Fut>: UnwindSafe,
Blanket Implementations
impl<S> TryStreamExt for Scan<St, S, Fut, F>
where
S: TryStream + ?Sized,
impl<S, T, E> TryStream for Scan<St, S, Fut, F>
where
S: Stream<Item = Result<T, E>> + ?Sized,
type Ok = T;type Error = E;fn try_poll_next(self: Pin<&mut S>, cx: &mut Context<'_>) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>
impl<T> Any for Scan<St, S, Fut, F>
where
T: 'static + ?Sized,
fn type_id(&self) -> TypeId
impl<T> Borrow<T> for Scan<St, S, Fut, F>
where
T: ?Sized,
fn borrow(&self) -> &T
impl<T> BorrowMut<T> for Scan<St, S, Fut, F>
where
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
impl<T> From<T> for Scan<St, S, Fut, F>
fn from(t: T) -> TReturns the argument unchanged.
impl<T> StreamExt for Scan<St, S, Fut, F>
where
T: Stream + ?Sized,
impl<T, Item> SinkExt<Item> for Scan<St, S, Fut, F>
where
T: Sink<Item> + ?Sized,
impl<T, U> Into<U> for Scan<St, S, Fut, F>
where
U: From<T>,
fn into(self) -> UCalls
U::from(self).That is, this conversion is whatever the implementation of
[From]<T> for Uchooses to do.
impl<T, U> TryFrom<U> for Scan<St, S, Fut, F>
where
U: Into<T>,
type Error = never;fn try_from(value: U) -> Result<T, never>
impl<T, U> TryInto<U> for Scan<St, S, Fut, F>
where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error;fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>