// Copyright David Abrahams 2002. // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) #ifndef BACK_REFERENCE_DWA2002510_HPP # define BACK_REFERENCE_DWA2002510_HPP # include # include # include # include namespace boost { namespace python { template struct back_reference { private: // types typedef typename detail::dependent::type source_t; public: typedef T type; back_reference(PyObject*, T); source_t const& source() const; T get() const; private: source_t m_source; T m_value; }; template class is_back_reference { public: BOOST_STATIC_CONSTANT(bool, value = false); }; template class is_back_reference > { public: BOOST_STATIC_CONSTANT(bool, value = true); }; // // implementations // template back_reference::back_reference(PyObject* p, T x) : m_source(detail::borrowed_reference(p)) , m_value(x) { } template typename back_reference::source_t const& back_reference::source() const { return m_source; } template T back_reference::get() const { return m_value; } }} // namespace boost::python #endif // BACK_REFERENCE_DWA2002510_HPP