// 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