quic_rpc/transport/misc/
mod.rs

1//! Miscellaneous transport utilities
2use std::convert::Infallible;
3
4use futures_lite::stream;
5use futures_sink::Sink;
6
7use super::StreamTypes;
8use crate::{
9    transport::{ConnectionErrors, Listener},
10    RpcMessage,
11};
12
13/// A dummy listener that does nothing
14///
15/// This can be useful as a default if you want to configure
16/// an optional listener.
17#[derive(Debug, Default)]
18pub struct DummyListener<In, Out> {
19    _p: std::marker::PhantomData<(In, Out)>,
20}
21
22impl<In, Out> Clone for DummyListener<In, Out> {
23    fn clone(&self) -> Self {
24        Self {
25            _p: std::marker::PhantomData,
26        }
27    }
28}
29
30impl<In: RpcMessage, Out: RpcMessage> ConnectionErrors for DummyListener<In, Out> {
31    type RecvError = Infallible;
32    type SendError = Infallible;
33    type OpenError = Infallible;
34    type AcceptError = Infallible;
35}
36
37impl<In: RpcMessage, Out: RpcMessage> StreamTypes for DummyListener<In, Out> {
38    type In = In;
39    type Out = Out;
40    type RecvStream = stream::Pending<Result<In, Self::RecvError>>;
41    type SendSink = Box<dyn Sink<Out, Error = Self::SendError> + Unpin + Send + Sync>;
42}
43
44impl<In: RpcMessage, Out: RpcMessage> Listener for DummyListener<In, Out> {
45    async fn accept(&self) -> Result<(Self::SendSink, Self::RecvStream), Self::AcceptError> {
46        futures_lite::future::pending().await
47    }
48
49    fn local_addr(&self) -> &[super::LocalAddr] {
50        &[]
51    }
52}