pub struct Subscription<S, M, I>where
    M: Message,
{ /* private fields */ }
Expand description

A subscription associated with a MessageStream that allows for sending and receiving control messages over it.

Notes

  • in order for any send or read operations to resolve, the associated MessageStream stream needs to be polled; that is necessary because this operation expects a control message response and that control message comes through the regular stream.

Implementations§

Send a message over the internal control channel and wait a control message response.

The method returns the following errors:

  • Err(..) when the sink failed to send an item
  • Ok(None) when the message stream got closed
  • Ok(Some(Err(()))) when message classification reported an error; the actual error still manifests through the message stream

Wait for a control message to arrive.

Trait Implementations§

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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Returns the argument unchanged.

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Calls U::from(self).

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

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Performs the conversion.
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