123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263 |
- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- Copyright (c) 2018 Kohei Takahashi
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- ==============================================================================*/
- #if !defined(FUSION_NEXT_IMPL_06052005_0900)
- #define FUSION_NEXT_IMPL_06052005_0900
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/iterator/next.hpp>
- #include <boost/fusion/iterator/equal_to.hpp>
- #include <boost/mpl/eval_if.hpp>
- #include <boost/mpl/identity.hpp>
- namespace boost { namespace fusion
- {
- struct filter_view_iterator_tag;
- template <typename Category, typename First, typename Last, typename Pred>
- struct filter_iterator;
- namespace extension
- {
- template <typename Tag>
- struct next_impl;
- template <>
- struct next_impl<filter_view_iterator_tag>
- {
- template <typename Iterator>
- struct apply
- {
- typedef typename Iterator::first_type first_type;
- typedef typename Iterator::last_type last_type;
- typedef typename Iterator::pred_type pred_type;
- typedef typename Iterator::category category;
- typedef typename
- mpl::eval_if<
- result_of::equal_to<first_type, last_type>
- , mpl::identity<last_type>
- , result_of::next<first_type>
- >::type
- next_type;
- typedef filter_iterator<category, next_type, last_type, pred_type> type;
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- static type
- call(Iterator const& i)
- {
- return type(fusion::next(i.first));
- }
- };
- };
- }
- }}
- #endif
|