Optional.swift

import Foundation

extension Optional 
{
    @discardableResult
    func ifSome(_ handler: (Wrapped) -> Void) -> Optional {
        switch self {
            case .some(let wrapped): handler(wrapped); return self
            case .none: return self
        }
    }
    @discardableResult
    func ifNone(_ handler: () -> Void) -> Optional {
        switch self {
            case .some: return self
            case .none(): handler(); return self
        }
    }
}

struct Person {
    let name: String
}

var p: Person? = Person(name: "Joe")
p.ifSome { print($0) }.ifNone { print("none") } // prints Person

p = nil
p.ifSome { print($0) }.ifNone { print("none") } // prints none