| // 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 |