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145 lines
4.8 KiB
145 lines
4.8 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_MAKE_SYSTEM_HPP |
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#define BOOST_UNITS_MAKE_SYSTEM_HPP |
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/// \file |
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/// \brief Metafunction returning a homogeneous system that can |
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/// represent any combination of the base units. |
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/// \details |
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/// Metafunction make_system returning a homogeneous system that can |
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/// represent any combination of the base units. There must |
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/// be no way to represent any of the base units in terms |
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/// of the others. make_system<foot_base_unit, meter_base_unit>::type |
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/// is not allowed, for example. |
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#include <boost/units/config.hpp> |
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#include <boost/units/dimensionless_type.hpp> |
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#include <boost/units/homogeneous_system.hpp> |
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#include <boost/units/detail/dimension_list.hpp> |
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#include <boost/units/detail/sort.hpp> |
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namespace boost { |
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namespace units { |
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#ifdef BOOST_UNITS_DOXYGEN |
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namespace detail { |
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struct unspecified {}; |
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} |
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/// Metafunction returning a homogeneous system that can |
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/// represent any combination of the base units. There must |
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/// be no way to represent any of the base units in terms |
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/// of the others. make_system<foot_base_unit, meter_base_unit>::type |
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/// is not allowed, for example. |
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template<class BaseUnit0, class BaseUnit1, class BaseUnit2, ..., class BaseUnitN> |
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struct make_system |
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{ |
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typedef homogeneous_system<detail::unspecified> type; |
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}; |
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#else |
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struct na {}; |
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template< |
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class U0 = na, |
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class U1 = na, |
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class U2 = na, |
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class U3 = na, |
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class U4 = na, |
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class U5 = na, |
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class U6 = na, |
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class U7 = na, |
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class U8 = na, |
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class U9 = na |
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> |
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struct make_system; |
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template<> |
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struct make_system<> |
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{ |
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typedef homogeneous_system<dimensionless_type> type; |
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}; |
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// Codewarrior 9.2 doesn't like using the defaults. Need |
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// to specify na explicitly. |
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template<class T0> |
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struct make_system<T0, na, na, na, na, na, na, na, na, na> |
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{ |
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typedef homogeneous_system<list<T0, dimensionless_type> > type; |
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}; |
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template<class T0, class T1> |
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struct make_system<T0, T1, na, na, na, na, na, na, na, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, dimensionless_type> > >::type> type; |
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}; |
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template<class T0, class T1, class T2> |
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struct make_system<T0, T1, T2, na, na, na, na, na, na, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, dimensionless_type> > > >::type> type; |
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}; |
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template<class T0, class T1, class T2, class T3> |
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struct make_system<T0, T1, T2, T3, na, na, na, na, na, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, list<T3, dimensionless_type> > > > >::type> type; |
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}; |
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template<class T0, class T1, class T2, class T3, class T4> |
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struct make_system<T0, T1, T2, T3, T4, na, na, na, na, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, list<T3, list<T4, dimensionless_type> > > > > >::type> type; |
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}; |
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template<class T0, class T1, class T2, class T3, class T4, class T5> |
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struct make_system<T0, T1, T2, T3, T4, T5, na, na, na, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, list<T3, list<T4, list<T5, dimensionless_type> > > > > > >::type> type; |
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}; |
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template<class T0, class T1, class T2, class T3, class T4, class T5, class T6> |
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struct make_system<T0, T1, T2, T3, T4, T5, T6, na, na, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, list<T3, list<T4, list<T5, list<T6, dimensionless_type> > > > > > > >::type> type; |
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}; |
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template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, class T7> |
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struct make_system<T0, T1, T2, T3, T4, T5, T6, T7, na, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, list<T3, list<T4, list<T5, list<T6, list<T7, dimensionless_type> > > > > > > > >::type> type; |
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}; |
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template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8> |
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struct make_system<T0, T1, T2, T3, T4, T5, T6, T7, T8, na> |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, list<T3, list<T4, list<T5, list<T6, list<T7, list<T8, dimensionless_type> > > > > > > > > >::type> type; |
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}; |
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template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9> |
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struct make_system |
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{ |
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typedef homogeneous_system<typename detail::insertion_sort<list<T0, list<T1, list<T2, list<T3, list<T4, list<T5, list<T6, list<T7, list<T8, list<T9, dimensionless_type> > > > > > > > > > >::type> type; |
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}; |
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#endif |
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} // namespace units |
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} // namespace boost |
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#endif
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