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- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- 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_INSERT_07222005_0730)
- #define FUSION_INSERT_07222005_0730
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/support/detail/as_fusion_element.hpp>
- #include <boost/fusion/iterator/mpl/convert_iterator.hpp>
- #include <boost/fusion/view/joint_view/joint_view.hpp>
- #include <boost/fusion/view/single_view/single_view.hpp>
- #include <boost/fusion/view/iterator_range/iterator_range.hpp>
- #include <boost/fusion/sequence/intrinsic/begin.hpp>
- #include <boost/fusion/sequence/intrinsic/end.hpp>
- #include <boost/fusion/adapted/mpl/mpl_iterator.hpp>
- #include <boost/fusion/support/is_sequence.hpp>
- #include <boost/utility/enable_if.hpp>
- namespace boost { namespace fusion
- {
- namespace result_of
- {
- template <typename Sequence, typename Position, typename T>
- struct insert
- {
- typedef typename detail::as_fusion_element<T>::type element_type;
- typedef typename convert_iterator<Position>::type pos_type;
- typedef typename result_of::begin<Sequence>::type first_type;
- typedef typename result_of::end<Sequence>::type last_type;
- typedef iterator_range<first_type, pos_type> left_type;
- typedef iterator_range<pos_type, last_type> right_type;
- typedef fusion::single_view<element_type> single_view;
- typedef joint_view<left_type, single_view const> left_insert_type;
- typedef joint_view<left_insert_type, right_type> type;
- };
- }
- template <typename Sequence, typename Position, typename T>
- BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- inline typename
- lazy_enable_if<
- traits::is_sequence<Sequence>
- , result_of::insert<Sequence const, Position, T>
- >::type
- insert(Sequence const& seq, Position const& pos, T const& x)
- {
- typedef result_of::insert<
- Sequence const, Position, T>
- result_of;
- typedef typename result_of::left_type left_type;
- typedef typename result_of::right_type right_type;
- typedef typename result_of::single_view single_view;
- typedef typename result_of::left_insert_type left_insert_type;
- typedef typename result_of::type result;
- left_type left(fusion::begin(seq), convert_iterator<Position>::call(pos));
- right_type right(convert_iterator<Position>::call(pos), fusion::end(seq));
- single_view insert(x);
- left_insert_type left_insert(left, insert);
- return result(left_insert, right);
- }
- }}
- #endif
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