/*============================================================================= 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_FRONT_09162005_0343) #define FUSION_FRONT_09162005_0343 #include <boost/fusion/support/config.hpp> #include <boost/fusion/sequence/intrinsic_fwd.hpp> #include <boost/fusion/sequence/intrinsic/begin.hpp> #include <boost/fusion/iterator/deref.hpp> #include <boost/mpl/bool.hpp> namespace boost { namespace fusion { struct fusion_sequence_tag; namespace result_of { template <typename Sequence> struct front : result_of::deref<typename result_of::begin<Sequence>::type> {}; } template <typename Sequence> BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED inline typename result_of::front<Sequence>::type front(Sequence& seq) { return *fusion::begin(seq); } template <typename Sequence> BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED inline typename result_of::front<Sequence const>::type front(Sequence const& seq) { return *fusion::begin(seq); } }} #endif