| /*============================================================================= |
| Copyright (c) 2001-2006 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/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> |
| inline typename result_of::front<Sequence>::type |
| front(Sequence& seq) |
| { |
| return *fusion::begin(seq); |
| } |
| |
| template <typename Sequence> |
| inline typename result_of::front<Sequence const>::type |
| front(Sequence const& seq) |
| { |
| return *fusion::begin(seq); |
| } |
| }} |
| |
| #endif |