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51 lines
1.1 KiB
51 lines
1.1 KiB
// 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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