1 /*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
3 Copyright (c) 2005-2006 Dan Marsden
5 Distributed under the Boost Software License, Version 1.0. (See accompanying
6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7 ==============================================================================*/
8 #if !defined(BOOST_FUSION_AT_IMPL_31122005_1642)
9 #define BOOST_FUSION_AT_IMPL_31122005_1642
11 #include <boost/fusion/support/config.hpp>
12 #include <boost/mpl/at.hpp>
14 namespace boost { namespace fusion
16 struct mpl_sequence_tag;
20 template<typename Tag>
24 struct at_impl<mpl_sequence_tag>
26 template <typename Sequence, typename N>
29 typedef typename mpl::at<Sequence, N>::type type;
31 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED