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