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ref(iroh): Relay map extend #3577

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a17b61e
Add impl Extend for RelayMap
matthiasbeyer Oct 25, 2025
6edd6dc
Replace RelayMap::extend() member fn with RelayMap::join
matthiasbeyer Oct 25, 2025
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Replace RelayMap::extend() member fn with RelayMap::join 
Signed-off-by: Matthias Beyer <[email protected]>
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matthiasbeyer committed Oct 31, 2025
commit 6edd6dc243113231424f15349196e49f38e93a18
13 changes: 8 additions & 5 deletions iroh-relay/src/relay_map.rs
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Expand Up @@ -112,11 +112,14 @@ impl RelayMap {
self.relays.write().expect("poisoned").remove(url)
}

/// Extends this `RelayMap` with another one.
pub fn extend(&self, other: &RelayMap) {
let mut a = self.relays.write().expect("poisoned");
let b = other.relays.read().expect("poisoned");
a.extend(b.iter().map(|(a, b)| (a.clone(), b.clone())));
/// Joins this `RelayMap` with another one into a new one
pub fn join(self, other: RelayMap) -> RelayMap {
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@flub flub Oct 25, 2025

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Isn't this called chain usually? I think this is very similar to the Iterator::chain signature.

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@matthiasbeyer matthiasbeyer Oct 25, 2025

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Yes it is. I opted for join because a Map is not something that can (semantically) be put into a ⛓️ chain! 😉 I think of chain() something that can be applied to a sequence of something (hence Iterator::chain but not BTreeMap::chain for example).

I have no strong feelings about the actual method name tho, so if you want me to change it, I'll happily do so.

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@dignifiedquire dignifiedquire Nov 1, 2025

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I am not convinced passing owned versions makes sense for a fully clonable thing. This API really doesn't communicate the fact that this doesn't actually create a new version, but rather modifies the underlying, likely shared instances

{
let mut a = self.relays.write().expect("poisoned");
let b = other.relays.read().expect("poisoned");
a.extend(b.iter().map(|(a, b)| (a.clone(), b.clone())));
}
self
}
}

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