/*============================================================================= 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