Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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// Copyright David Abrahams 2004. Use, modification and distribution is
// subject to the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at

#include "node_iterator2.hpp"
#include <string>
#include <memory>
#include <iostream>
#include <algorithm>
#include <boost/mem_fn.hpp>
#include <cassert>

int main()
    std::auto_ptr<node<int> > nodes(new node<int>(42));
    nodes->append(new node<std::string>(" is greater than "));
    nodes->append(new node<int>(13));

    // Check interoperability
    assert(node_iterator(nodes.get()) == node_const_iterator(nodes.get()));
    assert(node_const_iterator(nodes.get()) == node_iterator(nodes.get()));
    assert(node_iterator(nodes.get()) != node_const_iterator());
    assert(node_const_iterator(nodes.get()) != node_iterator());
        node_iterator(nodes.get()), node_iterator()
      , std::ostream_iterator<node_base>(std::cout, " ")
    std::cout << std::endl;
        node_iterator(nodes.get()), node_iterator()
      , boost::mem_fn(&node_base::double_me)

        node_const_iterator(nodes.get()), node_const_iterator()
      , std::ostream_iterator<node_base>(std::cout, "/")
    std::cout << std::endl;
    return 0;