/*
 * Object-Oriented Programming
 * Copyright (C) 2013 Thomas Wies
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA.
 */

#pragma once

template<typename T>
class List {
  T hd;
  const List<T>* tl;
  List():;
  List(T head, const List<T>* tail): hd(head), tl(tail) {}
public:
  static const List<T>* nil() {
    static const List<T>* nil = new List();
    return nil;
  }
  T head() const { return hd; }
  const List<T>* tail() const { return tl; }
  const List<T>* add(T e) const {
    return new List(e, this);
  }
};