promise with ReactiveSwift #4

promise4.swift

Promise<JSON, CommonError> { observer, disposable in
    Alamofire.request("https://httpbin.org/get").responseJSON { response in
        guard case let .success(value) = response.result else {
            observer.send(error: .anyError)
            return
        }
        observer.send(value: JSON(value))
        observer.sendCompleted()
    }
}.value { json in
    print(json)
}.completed {
    print("done")
}.failed { error in
    print("error")
}