package StackModule

public module StackModule
	static thistype first = null
	static int count = 0
	thistype next

	construct()
		count++
		if count == 1
			first = this
		else
			next = first
			first = this

	ondestroy
		count--
		first = this.next

	static function peek() returns thistype
		return first

	static function pop() returns thistype
		destroy first //destroying 'first' will make a new item the first one
		return first