#!/usr/bin/swift

import Foundation

/*
 Xcode 10.2.1
 Apple Swift version 5.0.1 (swiftlang-1001.0.82.4 clang-1001.0.46.5)
 Target: x86_64-apple-darwin18.6.0

 ./ConvenienceInit.swift:36:13: warning: code after 'return' will never be executed
 return nil
 ^
 ./ConvenienceInit.swift:40:5: error: 'self' used before 'self.init' call or assignment to 'self'
 }
 
 ----
 
 Xcode 11.0 beta 2
 Apple Swift version 5.1 (swiftlang-1100.0.43.3 clang-1100.0.26.3)
 Target: x86_64-apple-darwin18.6.0

 ./ConvenienceInit.swift:36:13: warning: code after 'return' will never be executed
 return nil
 ^
 ./ConvenienceInit.swift:40:5: error: 'self' used before 'self.init' call or assignment to 'self'
 }

 */

class Class {
    let variable: Int
    
    convenience init?(withOptional argument: Int?) {
        guard let value = argument else {
            print("Unexpected: \(String(describing: argument))"); return
            return nil
        }
        
        self.init(with: value)
    }
    
    init(with argument: Int) {
        variable = argument
    }
}

let c = Class(withOptional: nil)