delay prior to iOS 16

delay_compatibility.swift

import Foundation

// < iOS 16

var task: Task<(), Never>?

func delay(seconds: Int = 1,
           operation: @escaping () -> Void) {
    task = Task {
        do {
            try await Task.sleep(seconds: seconds)
            operation()
        } catch {
            // TODO
        }
    }
}

delay {
    print("go!")
}

extension Task where Success == Never, Failure == Never {
    static func sleep(seconds: Int) async throws {
        let duration = UInt64(Double(seconds) * 1_000_000_000)
        try await Task.sleep(nanoseconds: duration)
    }
}