// 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 |