Ticket #2073: slist_swap_test.cpp

//  Copyright (c) 2008 Hartmut Kaiser
// 
//  Distributed under the Boost Software License, Version 1.0. (See accompanying 
//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#include <boost/detail/lightweight_test.hpp>
#include <boost/intrusive/slist.hpp>

struct queue_entry
{
    typedef boost::intrusive::slist_member_hook<
        boost::intrusive::link_mode<boost::intrusive::normal_link>
    > hook_type;

    queue_entry(int id)
      : id_(id)
    {}

    int id_;
    hook_type slist_hook_;
};

typedef boost::intrusive::member_hook<
    queue_entry, queue_entry::hook_type, &queue_entry::slist_hook_
> slist_option_type;

typedef boost::intrusive::slist<
    queue_entry, slist_option_type,
    boost::intrusive::cache_last<true>,
    boost::intrusive::constant_time_size<true>
> queue_type;

int main()
{
    queue_type queue1, queue2;

    queue_entry e1(0), e2(2), e3(3), e4(4);
    queue1.push_back(e1);
    queue1.push_back(e2);
    queue1.push_back(e3);
    queue1.push_back(e4);

//     queue2.swap(queue1);   // this works
    queue1.swap(queue2);      // this doesn't work

    BOOST_TEST(!queue2.empty());
    return boost::report_errors();
}