Either.swift

//
//  Either.swift
//  MemoryInvestigation
//
//  Created by David Owens II on 8/22/14.
//  Copyright (c) 2014 Kiad Software. All rights reserved.
//

import Foundation


public enum Either<T, U> {
    case Left(Box<T>)
    case Right(Box<U>)
    
    init (left: T) {
        self = .Left(Box(left))
    }

    init (right: U) {
        self = .Right(Box(right))
    }

    public var left: T? {
        switch self {
        case let .Left(box): return box.value
        default: return nil
        }
    }

    public var right: U? {
        switch self {
        case let .Right(box): return box.value
        default: return nil
        }
    }
}


public final class Box<T> {
    let value: T
    init(_ value: T) { self.value = value }
}