52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
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// Boost.Units - A C++ library for zero-overhead dimensional analysis and
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// unit/quantity manipulation and conversion
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//
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// Copyright (C) 2003-2008 Matthias Christian Schabel
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// Copyright (C) 2008 Steven Watanabe
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_UNITS_GET_SYSTEM_HPP
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#define BOOST_UNITS_GET_SYSTEM_HPP
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/// \file
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/// \brief Get the system of a unit, absolute unit or quantity.
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#include <boost/units/units_fwd.hpp>
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namespace boost {
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namespace units {
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template<class T>
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struct get_system {};
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/// Get the system of a unit.
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template<class Dim,class System>
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struct get_system< unit<Dim,System> >
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{
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typedef System type;
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};
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/// Get the system of an absolute unit.
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template<class Unit>
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struct get_system< absolute<Unit> >
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{
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typedef typename get_system<Unit>::type type;
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};
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/// Get the system of a quantity.
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template<class Unit,class Y>
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struct get_system< quantity<Unit,Y> >
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{
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typedef typename get_system<Unit>::type type;
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};
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} // namespace units
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} // namespace boost
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#endif // BOOST_UNITS_GET_SYSTEM_HPP
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