// 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_DIMENSIONLESS_HPP | |
#define BOOST_UNITS_IS_DIMENSIONLESS_HPP | |
/// | |
/// \file | |
/// \brief Check if a unit or quantity is dimensionless. | |
/// | |
#include <boost/mpl/bool.hpp> | |
#include <boost/units/units_fwd.hpp> | |
namespace boost { | |
namespace units { | |
template<class T> | |
struct is_dimensionless : | |
public mpl::false_ | |
{ }; | |
/// Check if a unit is dimensionless. | |
template<class System> | |
struct is_dimensionless< unit<dimensionless_type,System> > : | |
public mpl::true_ | |
{ }; | |
/// Check if a quantity is dimensionless. | |
template<class Unit,class Y> | |
struct is_dimensionless< quantity<Unit,Y> > : | |
public is_dimensionless<Unit> | |
{ }; | |
} // namespace units | |
} // namespace boost | |
#endif // BOOST_UNITS_IS_DIMENSIONLESS_HPP |