Swift Sequence

gistfile1.swift

// Swift Sequence

import UIKit

var str = "Hello, playground"

class Cart<T> {
	var items: [T]

	init(items: [T]) {
		self.items = items
	}
}

extension Cart: SequenceType {
	typealias Generator = GeneratorOf<T>

	func generate() -> GeneratorOf<T> {
		var i = 0
		return GeneratorOf { return i >= self.items.count ? nil : self.items[i++] }
	}
}

var cart = Cart(items: ["foo", "bar", "baz"])

for item in cart {
	println(item)
}