1 /*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 ==============================================================================*/
7 #if !defined(FUSION_PUSH_FRONT_07162005_0749)
8 #define FUSION_PUSH_FRONT_07162005_0749
10 #include <boost/fusion/support/detail/as_fusion_element.hpp>
11 #include <boost/fusion/view/joint_view/joint_view.hpp>
12 #include <boost/fusion/view/single_view/single_view.hpp>
13 #include <boost/fusion/support/is_sequence.hpp>
14 #include <boost/utility/enable_if.hpp>
16 namespace boost { namespace fusion
20 template <typename Sequence, typename T>
23 typedef fusion::single_view<typename detail::as_fusion_element<T>::type> single_view;
24 typedef joint_view<single_view const, Sequence> type;
28 template <typename Sequence, typename T>
32 traits::is_sequence<Sequence>
33 , result_of::push_front<Sequence const, T>
35 push_front(Sequence const& seq, T const& x)
37 typedef typename result_of::push_front<Sequence const, T> push_front;
38 typedef typename push_front::single_view single_view;
39 typedef typename push_front::type result;
41 return result(x_, seq);