mpl/detail/empty_impl.hpp

0001 /*=============================================================================
0002     Copyright (c) 2001-2011 Joel de Guzman
0003     Copyright (c) 2005-2006 Dan Marsden
0004
0005     Distributed under the Boost Software License, Version 1.0. (See accompanying
0006     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0007 ==============================================================================*/
0008 #if !defined(BOOST_FUSION_EMPTY_IMPL_31122005_1554)
0009 #define BOOST_FUSION_EMPTY_IMPL_31122005_1554
0010
0011 #include <boost/fusion/support/config.hpp>
0012 #include <boost/mpl/empty.hpp>
0013
0014 namespace boost { namespace fusion
0015 {
0016     struct mpl_sequence_tag;
0017
0018     namespace extension
0019     {
0020         template <typename Sequence>
0021         struct empty_impl;
0022
0023         template <>
0024         struct empty_impl<mpl_sequence_tag>
0025         {
0026             template <typename Sequence>
0027             struct apply : mpl::empty<Sequence> {};
0028         };
0029     }
0030 }}
0031
0032 #endif