Struct QueueChannel 

pub struct QueueChannel<OutElem, InElem, R: 'static>
where
    OutElem: Send + Clone + 'static,
    InElem: Send + 'static,
{ /* private fields */ }

Queue-backed channel without stream or fold variants — always Send + Sync when element types are Send, unlike Channel (whose ChannelState includes stream drivers that are not Send).

Implementations

impl<OutElem, InElem, R> QueueChannel<OutElem, InElem, R>

where OutElem: Send + Clone + 'static, InElem: Send + 'static, R: 'static,

pub fn from_queue_and_map( q: Queue<OutElem>, map_in: impl Fn(InElem) -> OutElem + Send + Sync + 'static, ) -> Self

Same wire shape as Channel::from_queue_and_map, but only the queue implementation exists.

pub fn shutdown(&self) -> Effect<(), (), ()>

Close the backing queue to producers; buffered values remain available to Self::read.

pub fn read(&self) -> Effect<Option<OutElem>, QueueError, R>

Read the next element, or None when the queue has ended / disconnected.

pub fn write(&self, value: InElem) -> Effect<(), (), R>

Enqueue one mapped element.

impl<T, R> QueueChannel<T, T, R>

where T: Send + Clone + 'static, R: 'static,

pub fn duplex_unbounded() -> Effect<QueueChannel<T, T, R>, (), ()>

Unbounded duplex with identity map-in (same as Channel::duplex_unbounded for the queue case).

pub fn to_stream(&self) -> Stream<T, QueueError, R>

Same drain semantics as Channel::to_stream: one bootstrap pull over QueueChannel::read.

Call QueueChannel::shutdown when no further writes are expected so Stream::run_collect can finish.

Trait Implementations

impl<OutElem, InElem, R> Clone for QueueChannel<OutElem, InElem, R>

where OutElem: Send + Clone + 'static, InElem: Send + 'static, R: 'static,

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.