internal IokeObject Pop()
{
if(head != null) {
while(Message.IsTerminator(head) && Message.GetNext(head) != null) {
head = Message.GetNext(head);
Message.SetPrev(head, null);
}
}
IokeObject headToReturn = head;
head = chains.head;
last = chains.last;
chains = chains.parent;
return headToReturn;
}
internal void Push(int precedence, IokeObject op, Level.Type type)
{
currentLevel = new Level(precedence, op, currentLevel, type);
chains = new BufferedChain(chains, last, head);
last = head = null;
}
