| // 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 | |
| // http://www.boost.org/LICENSE_1_0.txt) | |
| #ifndef BOOST_UNITS_DETAIL_ORDINAL_HPP_INCLUDED | |
| #define BOOST_UNITS_DETAIL_ORDINAL_HPP_INCLUDED | |
| #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 { | |
| template<> | |
| struct less_impl<units::detail::ordinal_tag, units::detail::ordinal_tag> { | |
| template<class T1, class T2> | |
| struct apply : bool_<(T1::value) < (T2::value)> {}; | |
| }; | |
| } | |
| } | |
| #endif |