Enumeration Nested Tip

EnumerationNestedTip.swift

import Foundation

struct Null {}

enum LikeError: Error {
    case unknown
    case liked
}

let likeResult: Result<Null, LikeError> = .failure(.liked)

// 1
switch likeResult {
case .success:
    print("Update")
    print("...")
    print("Lalala")
case .failure(let error):
    switch error {
    case .unknown:
        print("Unknown error")
    case .liked:
        print("Update")
        print("...")
        print("Lalala")
    }
}

// 2
switch likeResult {
case .success, .failure(.liked):
    print("Update")
    print("...")
    print("Lalala")
case .failure(.unknown):
    print("Unknown error")
}