forked from boostorg/fusion
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2006 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(FUSION_FIND_05052005_1107)
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#define FUSION_FIND_05052005_1107
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#include <boost/fusion/algorithm/query/detail/find_if.hpp>
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#include <boost/fusion/algorithm/query/detail/assoc_find.hpp>
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#include <boost/fusion/sequence/intrinsic/begin.hpp>
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#include <boost/fusion/sequence/intrinsic/end.hpp>
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#include <boost/fusion/support/category_of.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/utility/enable_if.hpp>
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namespace boost { namespace fusion
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{
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struct associative_sequence_tag;
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namespace result_of
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{
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template <
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typename Sequence
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, typename T
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, bool is_associative_sequence = traits::is_associative<Sequence>::value >
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struct find;
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template <typename Sequence, typename T>
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struct find<Sequence, T, false>
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{
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typedef
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detail::static_seq_find_if<
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typename result_of::begin<Sequence>::type
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, typename result_of::end<Sequence>::type
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, is_same<mpl::_, T>
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>
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filter;
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typedef typename filter::type type;
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};
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template <typename Sequence, typename T>
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struct find<Sequence, T, true>
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{
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typedef detail::assoc_find<Sequence, T> filter;
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typedef typename filter::type type;
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};
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}
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template <typename T, typename Sequence>
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inline typename
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lazy_disable_if<
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is_const<Sequence>
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, result_of::find<Sequence, T>
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>::type const
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find(Sequence& seq)
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{
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typedef typename result_of::find<Sequence, T>::filter filter;
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return filter::call(seq);
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}
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template <typename T, typename Sequence>
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inline typename result_of::find<Sequence const, T>::type const
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find(Sequence const& seq)
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{
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typedef typename result_of::find<Sequence const, T>::filter filter;
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return filter::call(seq);
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}
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}}
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#endif
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