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Implement FusedStream for Swarm (#1433)

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* Implement FusedStream for Swarm

The stream for swarm will never terminate, and therefore does not have to
keep track of termination.

* Get rid of the wall of complex type constraints

...as they don't seem to be necessary anymore for latest master
This commit is contained in:
Rüdiger Klaehn
2020-02-18 10:33:01 +01:00
committed by GitHub
parent b6a93b3c5e
commit 145200fa4f
1 changed files with 17 additions and 1 deletions
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18
swarm/src/lib.rs
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@ -85,7 +85,7 @@ pub use protocols_handler::{
pub type NegotiatedSubstream = Negotiated<Substream<StreamMuxerBox>>;
use protocols_handler::{NodeHandlerWrapperBuilder, NodeHandlerWrapperError};
use futures::{prelude::*, executor::{ThreadPool, ThreadPoolBuilder}};
use futures::{prelude::*, executor::{ThreadPool, ThreadPoolBuilder}, stream::FusedStream};
use libp2p_core::{
Executor, Negotiated, Transport, Multiaddr, PeerId, ProtocolName,
muxing::{StreamMuxer, StreamMuxerBox},
@ -502,6 +502,22 @@ where TBehaviour: NetworkBehaviour<ProtocolsHandler = THandler>,
}
}
/// the stream of behaviour events never terminates, so we can implement fused for it
impl<TBehaviour, TInEvent, TOutEvent, THandler, THandlerErr, TConnInfo> FusedStream for
ExpandedSwarm<TBehaviour, TInEvent, TOutEvent, THandler, THandlerErr, TConnInfo>
where TBehaviour: NetworkBehaviour<ProtocolsHandler = THandler>,
THandlerErr: error::Error + Send + 'static,
THandler: IntoProtocolsHandler + Send + 'static,
TInEvent: Send + 'static,
TOutEvent: Send + 'static,
THandler::Handler: ProtocolsHandler<InEvent = TInEvent, OutEvent = TOutEvent, Error = THandlerErr>,
TConnInfo: ConnectionInfo<PeerId = PeerId> + fmt::Debug + Clone + Send + 'static,
{
fn is_terminated(&self) -> bool {
false
}
}
/// Parameters passed to `poll()`, that the `NetworkBehaviour` has access to.
// TODO: #[derive(Debug)]
pub struct SwarmPollParameters<'a> {