fusion/mpl/empty.hpp

0001 /*=============================================================================
0002     Copyright (c) 2001-2011 Joel de Guzman
0003
0004     Distributed under the Boost Software License, Version 1.0. (See accompanying
0005     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 ==============================================================================*/
0007 #if !defined(FUSION_EMPTY_10022005_1619)
0008 #define FUSION_EMPTY_10022005_1619
0009
0010 #include <boost/fusion/support/config.hpp>
0011 #include <boost/mpl/empty.hpp>
0012 #include <boost/fusion/sequence/intrinsic/empty.hpp>
0013
0014 namespace boost { namespace mpl
0015 {
0016     template <typename Tag>
0017     struct empty_impl;
0018
0019     template <>
0020     struct empty_impl<fusion::fusion_sequence_tag>
0021     {
0022         template <typename Sequence>
0023         struct apply : fusion::result_of::empty<Sequence> {};
0024     };
0025 }}
0026
0027 #endif