1 // Copyright David Abrahams 2002. 2 // Distributed under the Boost Software License, Version 1.0. (See 3 // accompanying file LICENSE_1_0.txt or copy at 4 // http://www.boost.org/LICENSE_1_0.txt) 5 #ifndef HAS_BACK_REFERENCE_DWA2002323_HPP 6 # define HAS_BACK_REFERENCE_DWA2002323_HPP 7 8 # include <boost/python/detail/prefix.hpp> 9 # include <boost/mpl/bool.hpp> 10 11 namespace boost { namespace python { 12 13 // traits class which users can specialize to indicate that a class 14 // contains a back-reference to its owning PyObject* 15 template <class T> 16 struct has_back_reference 17 : mpl::false_ 18 { 19 }; 20 21 22 }} // namespace boost::python 23 24 #endif // HAS_BACK_REFERENCE_DWA2002323_HPP 25