Created
December 15, 2024 00:40
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import AsyncAlgorithms | |
final class AsyncChannelObserverToken { | |
private let task: Task<Void, Error> | |
fileprivate init(_ task: Task<Void, Error>) { | |
self.task = task | |
} | |
func cancel() { | |
if !task.isCancelled { | |
task.cancel() | |
} | |
} | |
deinit { | |
cancel() | |
} | |
} | |
extension AsyncChannel { | |
func addObserver(@_inheritActorContext _ observer: @escaping @isolated(any) @Sendable (Element) -> Void) -> AsyncChannelObserverToken { | |
AsyncChannelObserverToken(Task { | |
for await value in self where !Task.isCancelled { | |
await observer(value) | |
} | |
}) | |
} | |
} | |
// Usage | |
let observer = channel.addObserver { element in | |
// | |
} | |
// later | |
observer = nil |
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