Node.jack

// Copyright (c) 2018, Bill Mei
// One node of a doubly-linked list.
class Node {
   field int value;
   field Node prev, next;

   constructor Node new(int _value) {
      let value = _value;
      let prev = null;
      let next = null;
      return this;
   }

   // Get pointer to next node (if any)
   method Node getNext() {
      return next;
   }

   // Get pointer to previous node (if any)
   method Node getPrev() {
      return prev;
   }

   // Get the value of the node
   method int getValue() {
      return value;
   }

   // Set the next pointer to the provided node
   method void setNext(Node node) {
      let next = node;
      return;
   }

   // Set the prev pointer to the provided node
   method void setPrev(Node node) {
      let prev = node;
      return;
   }

   method void dispose() {
      do Memory.deAlloc(this);
      return;
   }
}