libp2p_core/upgrade/
either.rs

1// Copyright 2018 Parity Technologies (UK) Ltd.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the "Software"),
5// to deal in the Software without restriction, including without limitation
6// the rights to use, copy, modify, merge, publish, distribute, sublicense,
7// and/or sell copies of the Software, and to permit persons to whom the
8// Software is furnished to do so, subject to the following conditions:
9//
10// The above copyright notice and this permission notice shall be included in
11// all copies or substantial portions of the Software.
12//
13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
14// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
19// DEALINGS IN THE SOFTWARE.
20
21use std::iter::Map;
22
23use either::Either;
24use futures::future;
25
26use crate::{
27    either::EitherFuture,
28    upgrade::{InboundUpgrade, OutboundUpgrade, UpgradeInfo},
29};
30
31impl<A, B> UpgradeInfo for Either<A, B>
32where
33    A: UpgradeInfo,
34    B: UpgradeInfo,
35{
36    type Info = Either<A::Info, B::Info>;
37    type InfoIter = Either<
38        Map<<A::InfoIter as IntoIterator>::IntoIter, fn(A::Info) -> Self::Info>,
39        Map<<B::InfoIter as IntoIterator>::IntoIter, fn(B::Info) -> Self::Info>,
40    >;
41
42    fn protocol_info(&self) -> Self::InfoIter {
43        match self {
44            Either::Left(a) => Either::Left(a.protocol_info().into_iter().map(Either::Left)),
45            Either::Right(b) => Either::Right(b.protocol_info().into_iter().map(Either::Right)),
46        }
47    }
48}
49
50impl<C, A, B, TA, TB, EA, EB> InboundUpgrade<C> for Either<A, B>
51where
52    A: InboundUpgrade<C, Output = TA, Error = EA>,
53    B: InboundUpgrade<C, Output = TB, Error = EB>,
54{
55    type Output = future::Either<TA, TB>;
56    type Error = Either<EA, EB>;
57    type Future = EitherFuture<A::Future, B::Future>;
58
59    fn upgrade_inbound(self, sock: C, info: Self::Info) -> Self::Future {
60        match (self, info) {
61            (Either::Left(a), Either::Left(info)) => {
62                EitherFuture::First(a.upgrade_inbound(sock, info))
63            }
64            (Either::Right(b), Either::Right(info)) => {
65                EitherFuture::Second(b.upgrade_inbound(sock, info))
66            }
67            _ => panic!("Invalid invocation of EitherUpgrade::upgrade_inbound"),
68        }
69    }
70}
71
72impl<C, A, B, TA, TB, EA, EB> OutboundUpgrade<C> for Either<A, B>
73where
74    A: OutboundUpgrade<C, Output = TA, Error = EA>,
75    B: OutboundUpgrade<C, Output = TB, Error = EB>,
76{
77    type Output = future::Either<TA, TB>;
78    type Error = Either<EA, EB>;
79    type Future = EitherFuture<A::Future, B::Future>;
80
81    fn upgrade_outbound(self, sock: C, info: Self::Info) -> Self::Future {
82        match (self, info) {
83            (Either::Left(a), Either::Left(info)) => {
84                EitherFuture::First(a.upgrade_outbound(sock, info))
85            }
86            (Either::Right(b), Either::Right(info)) => {
87                EitherFuture::Second(b.upgrade_outbound(sock, info))
88            }
89            _ => panic!("Invalid invocation of EitherUpgrade::upgrade_outbound"),
90        }
91    }
92}
libp2p_core/upgrade/either.rs

libp2p_core/upgrade/
either.rs
