1 /*============================================================================= 2 Copyright (c) 2001-2011 Joel de Guzman 3 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_FRONT_10022005_1618) 8 #define FUSION_FRONT_10022005_1618 9 10 #include <boost/fusion/support/config.hpp> 11 #include <boost/mpl/front.hpp> 12 #include <boost/fusion/sequence/intrinsic/begin.hpp> 13 #include <boost/fusion/iterator/value_of.hpp> 14 15 namespace boost { namespace mpl 16 { 17 template <typename Tag> 18 struct front_impl; 19 20 template <> 21 struct front_impl<fusion::fusion_sequence_tag> 22 { 23 template <typename Sequence> 24 struct apply : 25 fusion::result_of::value_of<typename fusion::result_of::begin<Sequence>::type> {}; 26 }; 27 }} 28 29 #endif 30