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// Boost.Units - A C++ library for zero-overhead dimensional analysis and 
// unit/quantity manipulation and conversion
// Copyright (C) 2003-2008 Matthias Christian Schabel
// Copyright (C) 2007-2008 Steven Watanabe
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at


#include <boost/mpl/less.hpp>
#include <boost/mpl/bool.hpp>

namespace boost {
namespace units {

namespace detail {

struct ordinal_tag {};


template<int N>
struct ordinal {
    typedef detail::ordinal_tag tag;
    static const long value = N;

template<int N>
const long ordinal<N>::value;


namespace mpl {

struct less_impl<units::detail::ordinal_tag, units::detail::ordinal_tag> {
    template<class T1, class T2>
    struct apply : bool_<(T1::value) < (T2::value)> {};