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74 lines
2.1 KiB
74 lines
2.1 KiB
6 years ago
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// Copyright (c) 2009 Rutger ter Borg
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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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//
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#ifndef BOOST_NUMERIC_BINDINGS_DETAIL_PROPERTY_MAP_HPP
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#define BOOST_NUMERIC_BINDINGS_DETAIL_PROPERTY_MAP_HPP
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#include <boost/mpl/at.hpp>
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#include <boost/mpl/fold.hpp>
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#include <boost/mpl/has_key.hpp>
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#include <boost/mpl/insert.hpp>
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#include <boost/mpl/vector.hpp>
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#include <boost/numeric/bindings/detail/adaptor.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace boost {
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namespace numeric {
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namespace bindings {
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namespace detail {
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template< typename T, typename Key >
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struct property_has_key: mpl::has_key< typename adaptor_access<T>::property_map, Key > {};
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template< typename T, typename Key >
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struct property_at {
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typedef typename mpl::at< typename adaptor_access<T>::property_map, Key >::type type;
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};
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template< typename T >
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struct property_map_of {
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typedef typename adaptor_access<T>::property_map type;
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};
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template< typename T, typename Key, typename Value >
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struct is_same_at: is_same< typename property_at< T, Key >::type, Value > {};
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//
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// Meta-function to insert multiple pairs into a map by using fold. Using the
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// provided mpl::insert can (only) insert elements in a map one-by-one.
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//
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template< typename T,
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typename P1 = mpl::na, typename P2 = mpl::na, typename P3 = mpl::na,
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typename P4 = mpl::na, typename P5 = mpl::na, typename P6 = mpl::na,
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typename P7 = mpl::na, typename P8 = mpl::na, typename P9 = mpl::na,
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typename P10 = mpl::na >
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struct property_insert {
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typedef mpl::vector< P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 > pair_vector;
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typedef typename property_map_of< T >::type properties;
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typedef typename mpl::fold<
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pair_vector,
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properties,
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mpl::if_<
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is_same< mpl::_2, mpl::void_ >,
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mpl::_1,
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mpl::insert< mpl::_1, mpl::_2 >
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>
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>::type type;
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};
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} // namespace detail
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} // namespace bindings
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} // namespace numeric
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} // namespace boost
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#endif
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