From laziness, vanity

narcis.swift

//: Playground - noun: a place where people can play

import UIKit

protocol AnyEquatable {
    func equals(otherObject: AnyEquatable) -> Bool
}
extension AnyEquatable {
    func equals(otherObject: AnyEquatable) -> Bool {
        return false
    }
}
extension AnyEquatable where Self : Equatable {
    // otherObject could also be 'Any'
    func equals(otherObject: AnyEquatable) -> Bool {
        if let otherAsSelf = otherObject as? Self {
            return otherAsSelf == self
        }
        return false
    }
}
extension Int :AnyEquatable {}
extension Float :AnyEquatable {}
extension String :AnyEquatable {}
extension Array :AnyEquatable {}
extension Dictionary :AnyEquatable {}

protocol AutoEquatable :Equatable {}
func ==<T: AutoEquatable>(lhs: T, rhs: T) -> Bool {
    let reLhs = Mirror(reflecting: lhs)
    let reRhs = Mirror(reflecting: rhs)
    
    var theSame = true
    
    if reLhs.children.count == 0 {
        return false
    }
    for (leftKid, rightKid) in zip(reLhs.children, reRhs.children) {
        if let
            leftKid = leftKid.value as? AnyEquatable,
            rightKid = rightKid.value as? AnyEquatable
        {
            theSame = leftKid.equals(rightKid)
        }
    }
    return theSame
}