CombineLifetime

When subscribing to a Swift Combine Publisher, we use a Set<AnyCancellable> most of the time, like this:

publisher
  .sink { value in
    // Do something with value
  }
  .store(in: &cancellables)

The problem with this is that Set is a value type, so it cannot be mutated if the owner is immutable. It is painful to use when the Set<AnyCancellable> needs to be stored in a struct or enum.

The solution for this is Lifetime, heavily inspired by ReactiveSwift's implementation. It's a final class, wraps a Set<AnyCancellable>, conforms to Cancellable and Hashable, and offers a convenient += operator:

lifetime += publisher
  .sink { value in
    // Do something with value
  }

Like any other Cancellable, it cancels the work automatically when it is deallocated, so make sure to keep its instance around.

Contact

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1.0.0

• Added initial implementation and tests