pub struct UnboundedReceiver<T> { /* private fields */ }
Expand description

The receiving end of an unbounded mpsc channel.

This value is created by the unbounded function.

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impl<T> UnboundedReceiver<T>

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pub fn close(&mut self)

Closes the receiving half of a channel, without dropping it.

This prevents any further messages from being sent on the channel while still enabling the receiver to drain messages that are buffered.

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pub fn try_next(&mut self) -> Result<Option<T>, TryRecvError>

Tries to receive the next message without notifying a context if empty.

It is not recommended to call this function from inside of a future, only when you’ve otherwise arranged to be notified when the channel is no longer empty.

This function returns:

  • Ok(Some(t)) when message is fetched
  • Ok(None) when channel is closed and no messages left in the queue
  • Err(e) when there are no messages available, but channel is not yet closed

Trait Implementations§

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impl<T> Debug for UnboundedReceiver<T>

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

Formats the value using the given formatter. Read more
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impl<T> Drop for UnboundedReceiver<T>

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<T> FusedStream for UnboundedReceiver<T>

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fn is_terminated(&self) -> bool

Returns true if the stream should no longer be polled.
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impl<T> Stream for UnboundedReceiver<T>

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type Item = T

Values yielded by the stream.
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fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<T>>

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

Returns the bounds on the remaining length of the stream. Read more
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impl<T> Unpin for UnboundedReceiver<T>

Auto Trait Implementations§

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impl<T> !RefUnwindSafe for UnboundedReceiver<T>

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impl<T> Send for UnboundedReceiver<T>where T: Send,

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impl<T> Sync for UnboundedReceiver<T>where T: Send,

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impl<T> !UnwindSafe for UnboundedReceiver<T>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<S, T, E> TryStream for Swhere S: Stream<Item = Result<T, E>> + ?Sized,

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type Ok = T

The type of successful values yielded by this future
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type Error = E

The type of failures yielded by this future
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fn try_poll_next( self: Pin<&mut S>, cx: &mut Context<'_> ) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>

Poll this TryStream as if it were a Stream. Read more