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_HAS_KEY_10022005_1617) 8 #define FUSION_HAS_KEY_10022005_1617 9 10 #include <boost/fusion/support/config.hpp> 11 #include <boost/mpl/has_key.hpp> 12 #include <boost/fusion/sequence/intrinsic/has_key.hpp> 13 14 namespace boost { namespace mpl 15 { 16 template <typename Tag> 17 struct has_key_impl; 18 19 template <> 20 struct has_key_impl<fusion::fusion_sequence_tag> 21 { 22 template <typename Sequence, typename Key> 23 struct apply : fusion::result_of::has_key<Sequence, Key> {}; 24 }; 25 }} 26 27 #endif 28 29