Converting Publisher's error type to Never in Combine

Question

I have a Publisher

var subject = PassthroughSubject<Int, Error>()

I want to convert it to

PassthroughSubject<Int, Never>

Is there anyway to achieve this ?

Edit - More Details

I do not want the Publisher to complete and the linked answer did not work because catch still completes the publisher.

Answer 1

Here's an example of using catch to turn an <Int, Error> into an <Int, Never>:

import UIKit
import Combine
class ViewController: UIViewController {
    let subject = PassthroughSubject<Int, Error>()
    var storage = Set<AnyCancellable>()
    override func viewDidLoad() {
        super.viewDidLoad()
        self.subject
            .catch { what in
                Empty(completeImmediately:false)
            }
            .sink {print($0)}
            .store(in: &self.storage)
    }
}

If you send 1 to the passthrough subject now, you get 1 out the end. But if you send an error to the passthrough subject, no error arrives at the end; the pipeline end type is <Int, Never>.

However, do note that you can then never send another value. This has nothing to do with the pipeline; it's because once you send an error through a Subject, that Subject is dead. There's nothing you can do about that.