Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(FUSION_INSERT_07222005_0730)
Chris@16: #define FUSION_INSERT_07222005_0730
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/support/detail/as_fusion_element.hpp>
Chris@16: #include <boost/fusion/iterator/mpl/convert_iterator.hpp>
Chris@16: #include <boost/fusion/container/vector/vector10.hpp>
Chris@16: #include <boost/fusion/view/joint_view/joint_view.hpp>
Chris@16: #include <boost/fusion/view/single_view/single_view.hpp>
Chris@16: #include <boost/fusion/view/iterator_range/iterator_range.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/begin.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/end.hpp>
Chris@16: #include <boost/fusion/adapted/mpl/mpl_iterator.hpp>
Chris@16: #include <boost/fusion/support/is_sequence.hpp>
Chris@16: #include <boost/utility/enable_if.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     namespace result_of
Chris@16:     {
Chris@16:         template <typename Sequence, typename Position, typename T>
Chris@16:         struct insert
Chris@16:         {
Chris@16:             typedef typename detail::as_fusion_element<T>::type element_type;
Chris@16:             typedef typename convert_iterator<Position>::type pos_type;
Chris@16:             typedef typename result_of::begin<Sequence>::type first_type;
Chris@16:             typedef typename result_of::end<Sequence>::type last_type;
Chris@16: 
Chris@16:             typedef iterator_range<first_type, pos_type> left_type;
Chris@16:             typedef iterator_range<pos_type, last_type> right_type;
Chris@16:             typedef fusion::single_view<element_type> single_view;
Chris@16:             typedef joint_view<left_type, single_view const> left_insert_type;
Chris@16:             typedef joint_view<left_insert_type, right_type> type;
Chris@16:         };
Chris@16:     }
Chris@16: 
Chris@16:     template <typename Sequence, typename Position, typename T>
Chris@101:     BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@101:     inline typename
Chris@16:         lazy_enable_if<
Chris@16:             traits::is_sequence<Sequence>
Chris@16:           , result_of::insert<Sequence const, Position, T>
Chris@16:         >::type
Chris@16:     insert(Sequence const& seq, Position const& pos, T const& x)
Chris@16:     {
Chris@16:         typedef result_of::insert<
Chris@16:             Sequence const, Position, T>
Chris@16:         result_of;
Chris@16:         typedef typename result_of::left_type left_type;
Chris@16:         typedef typename result_of::right_type right_type;
Chris@16:         typedef typename result_of::single_view single_view;
Chris@16:         typedef typename result_of::left_insert_type left_insert_type;
Chris@16:         typedef typename result_of::type result;
Chris@16: 
Chris@16:         left_type left(fusion::begin(seq), convert_iterator<Position>::call(pos));
Chris@16:         right_type right(convert_iterator<Position>::call(pos), fusion::end(seq));
Chris@16:         single_view insert(x);
Chris@16:         left_insert_type left_insert(left, insert);
Chris@16:         return result(left_insert, right);
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #endif
Chris@16: