1 /*============================================================================= 2 Copyright (c) 2012 Kohei Takahashi 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(BOOST_FUSION_CLEAR_10172012_0940) 8 #define BOOST_FUSION_CLEAR_10172012_0940 9 10 #include <boost/mpl/identity.hpp> 11 #include <boost/fusion/adapted/std_tuple/tag_of.hpp> 12 13 namespace boost { namespace fusion { namespace detail 14 { 15 template <typename Tag> 16 struct clear; 17 18 template <> 19 struct clear<std_tuple_tag> : mpl::identity<std::tuple<> > {}; 20 21 }}} 22 23 #endif 24