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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | // 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
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