[indent=4]
/*
   Stack, in Genie, with GLib double ended Queues
   valac stack.gs
*/
init
    var stack = new Queue of int()

    // push
    stack.push_tail(2)
    stack.push_tail(1)

    // pop (and peek at top)
    print stack.pop_tail().to_string()
    print stack.peek_tail().to_string()

    // empty
    print "stack size before clear: " + stack.get_length().to_string()
    stack.clear()
    print "After clear, stack.is_empty(): " + stack.is_empty().to_string()