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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_PUSH_FRONT_07162005_0749)
- #define FUSION_PUSH_FRONT_07162005_0749
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/support/detail/as_fusion_element.hpp>
- #include <boost/fusion/view/joint_view/joint_view.hpp>
- #include <boost/fusion/view/single_view/single_view.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 T>
- struct push_front
- {
- typedef fusion::single_view<typename detail::as_fusion_element<T>::type> single_view;
- typedef joint_view<single_view const, Sequence> type;
- };
- }
- template <typename Sequence, typename T>
- BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- inline typename
- lazy_enable_if<
- traits::is_sequence<Sequence>
- , result_of::push_front<Sequence const, T>
- >::type
- push_front(Sequence const& seq, T const& x)
- {
- typedef typename result_of::push_front<Sequence const, T> push_front;
- typedef typename push_front::single_view single_view;
- typedef typename push_front::type result;
- single_view x_(x);
- return result(x_, seq);
- }
- }}
- #endif
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