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A Swift Extension for converting a Combine Publisher to async/await
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| extension Publisher { | |
| @available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *) | |
| func asyncFirst() async throws -> Output? { | |
| return try await self | |
| .first() | |
| .values | |
| .first { _ in true } | |
| } | |
| // https://medium.com/geekculture/from-combine-to-async-await-c08bf1d15b77 | |
| func asyncFirstManual() async throws -> Output? { | |
| try await withCheckedThrowingContinuation { continuation in | |
| var cancellable: AnyCancellable? | |
| var finishedWithoutValue = true | |
| cancellable = self | |
| .first() | |
| .sink { result in | |
| switch result { | |
| case .finished: | |
| if finishedWithoutValue { | |
| continuation.resume(with: .success(nil)) | |
| } | |
| case let .failure(error): | |
| continuation.resume(throwing: error) | |
| } | |
| cancellable?.cancel() | |
| } receiveValue: { value in | |
| finishedWithoutValue = false | |
| continuation.resume(with: .success(value)) | |
| } | |
| } | |
| } | |
| } |
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