64 lines
2.0 KiB
C++
Executable File
64 lines
2.0 KiB
C++
Executable File
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2018 Kohei Takahashi
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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_NEXT_IMPL_06052005_0900)
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#define FUSION_NEXT_IMPL_06052005_0900
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/iterator/next.hpp>
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#include <boost/fusion/iterator/equal_to.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/mpl/identity.hpp>
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namespace boost { namespace fusion
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{
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struct filter_view_iterator_tag;
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template <typename Category, typename First, typename Last, typename Pred>
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struct filter_iterator;
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namespace extension
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{
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template <typename Tag>
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struct next_impl;
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template <>
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struct next_impl<filter_view_iterator_tag>
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{
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template <typename Iterator>
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struct apply
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{
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typedef typename Iterator::first_type first_type;
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typedef typename Iterator::last_type last_type;
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typedef typename Iterator::pred_type pred_type;
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typedef typename Iterator::category category;
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typedef typename
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mpl::eval_if<
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result_of::equal_to<first_type, last_type>
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, mpl::identity<last_type>
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, result_of::next<first_type>
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>::type
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next_type;
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typedef filter_iterator<category, next_type, last_type, pred_type> type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& i)
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{
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return type(fusion::next(i.first));
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}
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};
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};
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}
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}}
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#endif
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