Is there a way to avoid using AnyPublisher/eraseToAnyPublisher all over the place?

Question

I\'m just learning how to use Combine. I have experience with Rx (RxSwift and RxJava) and I\'m noticing that it\'s quite similar.

However, one thing that is quite differ

Answer 1

With opaque return the type is defined by what is exactly returned from closure, so you can use just

func createPublisher() -> some Publisher {
    return Just(1)
}

let cancellable = createPublisher()
   .print()
   .sink(receiveCompletion: { _ in
       print(">> done")
   }) { value in
       print(">> \(value)")
   }

// ... all other code here

and it works. Tested with Xcode 11.4.