---
title: publisher
framework: swift
role: symbol
role_heading: Instance Property
path: swift/result/publisher-swift.property
---

# publisher

A Combine publisher that publishes this instance’s result to each subscriber exactly once, or fails immediately if the result indicates failure.

## Declaration

```swift
var publisher: Result<Success, Failure>.Publisher { get }
```

## Discussion

Discussion In the following example, goodResult provides a successful result with the integer value 1. A sink subscriber connected to the result’s publisher receives the output 1, followed by a normal completion (Subscribers.Completion.finished).  let goodResult: Result<Int, MyError> = .success(1)  goodResult.publisher      .sink(receiveCompletion: { print("goodResult done: \($0)")},            receiveValue: { print("goodResult value: \($0)")} )  // Prints:  // goodResult value: 1  // goodResult done: finished In contrast with the Just publisher, which always publishes a single value, this publisher might not send any values and instead terminate with an error, if the result is /Swift/Result/failure. In the next example, badResult is a failure result that wraps a custom error. A sink subscriber connected to this result’s publisher immediately receives a termination (Subscribers.Completion.failure(_:)).  struct MyError: Error, CustomDebugStringConvertible {      var debugDescription: String = "MyError"  }  let badResult: Result<Int, MyError> = .failure(MyError())  badResult.publisher      .sink(receiveCompletion: { print("badResult done: \($0)")},            receiveValue: { print("badResult value: \($0)")} )  // Prints:  // badResult done: failure(MyError)

## See Also

### Publishing a Result

- [Result.Publisher](swift/result/publisher-swift.struct.md)