// 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) 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_IS_DIMENSION_LIST_HPP | |
#define BOOST_UNITS_IS_DIMENSION_LIST_HPP | |
/// | |
/// \file | |
/// \brief Check that a type is a valid dimension list. | |
/// | |
#include <boost/mpl/bool.hpp> | |
#include <boost/units/units_fwd.hpp> | |
namespace boost { | |
namespace units { | |
/// Check that a type is a valid dimension list. | |
template<typename Seq> | |
struct is_dimension_list : | |
public mpl::false_ | |
{ }; | |
template<typename Item, typename Next> | |
struct is_dimension_list<list<Item, Next> > : | |
public mpl::true_ | |
{ }; | |
template<> | |
struct is_dimension_list<dimensionless_type> : | |
public mpl::true_ | |
{ }; | |
} // namespace units | |
} // namespace boost | |
#endif // BOOST_UNITS_IS_DIMENSION_LIST_HPP |