Extension that adds a specialised sink method for handling a result enum, providing a failure and success closure avoids a layer of nesting

SinkPublisher+Result.swift

public extension Publisher where Failure == Never {
    func sinkResult<U, E>(
        receiveSuccess: @escaping ((U) -> Void),
        receiveFailure: @escaping ((E) -> Void)
    ) -> AnyCancellable where Output == Result<U, E> {
        let subscriber = Subscribers.Sink<Output, Failure>(
            receiveCompletion: { _ in },
            receiveValue: { result in
                switch result {
                case .success(let value):
                    receiveSuccess(value)
                case .failure(let failure):
                    receiveFailure(failure)
                }
            }
        )
        subscribe(subscriber)
        return AnyCancellable(subscriber)
    }
}