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feat(swarm): add ConnectionDenied::downcast_ref #4020

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Jun 12, 2023
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feat(swarm): add ConnectionDenied::downcast_ref #4020

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3 changes: 3 additions & 0 deletions swarm/CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,8 @@

- Remove deprecated items. See [PR 3956].

- Add ability to `downcast_ref` ConnectionDenied errors. See [PR 4020].

[PR 3292]: https://github.com/libp2p/rust-libp2p/pull/3292
[PR 3605]: https://github.com/libp2p/rust-libp2p/pull/3605
[PR 3651]: https://github.com/libp2p/rust-libp2p/pull/3651
Expand All @@ -80,6 +82,7 @@
[PR 3927]: https://github.com/libp2p/rust-libp2p/pull/3927
[PR 3955]: https://github.com/libp2p/rust-libp2p/pull/3955
[PR 3956]: https://github.com/libp2p/rust-libp2p/pull/3956
[PR 4020]: https://github.com/libp2p/rust-libp2p/pull/4020
[PR 4037]: https://github.com/libp2p/rust-libp2p/pull/4037

## 0.42.2
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8 changes: 8 additions & 0 deletions swarm/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1730,6 +1730,14 @@ impl ConnectionDenied {

Ok(*inner)
}

/// Attempt to downcast to a particular reason for why the connection was denied.
pub fn downcast_ref<E>(&self) -> Option<&E>
where
E: error::Error + Send + Sync + 'static,
{
self.inner.downcast_ref::<E>()
}
}

impl fmt::Display for ConnectionDenied {
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