| // 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_GET_SYSTEM_HPP |
| #define BOOST_UNITS_GET_SYSTEM_HPP |
| |
| /// \file |
| /// \brief Get the system of a unit, absolute unit or quantity. |
| |
| #include <boost/units/units_fwd.hpp> |
| |
| namespace boost { |
| |
| namespace units { |
| |
| template<class T> |
| struct get_system {}; |
| |
| /// Get the system of a unit. |
| template<class Dim,class System> |
| struct get_system< unit<Dim,System> > |
| { |
| typedef System type; |
| }; |
| |
| /// Get the system of an absolute unit. |
| template<class Unit> |
| struct get_system< absolute<Unit> > |
| { |
| typedef typename get_system<Unit>::type type; |
| }; |
| |
| /// Get the system of a quantity. |
| template<class Unit,class Y> |
| struct get_system< quantity<Unit,Y> > |
| { |
| typedef typename get_system<Unit>::type type; |
| }; |
| |
| } // namespace units |
| |
| } // namespace boost |
| |
| #endif // BOOST_UNITS_GET_SYSTEM_HPP |