Struct futures::stream::select_all::SelectAll
source · pub struct SelectAll<St> { /* private fields */ }
Expand description
An unbounded set of streams
This “combinator” provides the ability to maintain a set of streams and drive them all to completion.
Streams are pushed into this set and their realized values are yielded as they become ready. Streams will only be polled when they generate notifications. This allows to coordinate a large number of streams.
Note that you can create a ready-made SelectAll
via the
select_all
function in the stream
module, or you can start with an
empty set with the SelectAll::new
constructor.
Implementations§
source§impl<St> SelectAll<St>
impl<St> SelectAll<St>
sourcepub fn new() -> SelectAll<St>
pub fn new() -> SelectAll<St>
Constructs a new, empty SelectAll
The returned SelectAll
does not contain any streams and, in this
state, SelectAll::poll
will return Poll::Ready(None)
.
sourcepub fn len(&self) -> usize
pub fn len(&self) -> usize
Returns the number of streams contained in the set.
This represents the total number of in-flight streams.
sourcepub fn push(&mut self, stream: St)
pub fn push(&mut self, stream: St)
Push a stream into the set.
This function submits the given stream to the set for managing. This
function will not call poll
on the submitted stream. The caller must
ensure that SelectAll::poll
is called in order to receive task
notifications.
sourcepub fn iter(&self) -> Iter<'_, St> ⓘ
pub fn iter(&self) -> Iter<'_, St> ⓘ
Returns an iterator that allows inspecting each stream in the set.
Trait Implementations§
source§impl<St> Extend<St> for SelectAll<St>
impl<St> Extend<St> for SelectAll<St>
source§fn extend<T>(&mut self, iter: T)where
T: IntoIterator<Item = St>,
fn extend<T>(&mut self, iter: T)where
T: IntoIterator<Item = St>,
source§fn extend_one(&mut self, item: A)
fn extend_one(&mut self, item: A)
extend_one
)source§fn extend_reserve(&mut self, additional: usize)
fn extend_reserve(&mut self, additional: usize)
extend_one
)source§impl<St> FromIterator<St> for SelectAll<St>
impl<St> FromIterator<St> for SelectAll<St>
source§impl<St> FusedStream for SelectAll<St>
impl<St> FusedStream for SelectAll<St>
source§fn is_terminated(&self) -> bool
fn is_terminated(&self) -> bool
true
if the stream should no longer be polled.source§impl<'a, St> IntoIterator for &'a SelectAll<St>
impl<'a, St> IntoIterator for &'a SelectAll<St>
source§impl<'a, St> IntoIterator for &'a mut SelectAll<St>
impl<'a, St> IntoIterator for &'a mut SelectAll<St>
source§impl<St> IntoIterator for SelectAll<St>
impl<St> IntoIterator for SelectAll<St>
source§impl<St> Stream for SelectAll<St>
impl<St> Stream for SelectAll<St>
source§fn poll_next(
self: Pin<&mut SelectAll<St>>,
cx: &mut Context<'_>,
) -> Poll<Option<<SelectAll<St> as Stream>::Item>>
fn poll_next( self: Pin<&mut SelectAll<St>>, cx: &mut Context<'_>, ) -> Poll<Option<<SelectAll<St> as Stream>::Item>>
None
if the stream is exhausted. Read moreAuto Trait Implementations§
impl<St> !Freeze for SelectAll<St>
impl<St> !RefUnwindSafe for SelectAll<St>
impl<St> Send for SelectAll<St>where
St: Send,
impl<St> Sync for SelectAll<St>
impl<St> Unpin for SelectAll<St>
impl<St> !UnwindSafe for SelectAll<St>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
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Err
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item is found
that does not satisfy the predicate. Read more