| author | sl |
| Tue, 10 Jun 2014 14:32:02 +0200 | |
| changeset 1 | 260cb5ec6c19 |
| permissions | -rw-r--r-- |
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// 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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|
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# include <boost/python/detail/prefix.hpp> |
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|
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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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|
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namespace boost { namespace python {
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|
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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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|
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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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|
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# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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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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|
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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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# else // no partial specialization |
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|
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}} // namespace boost::python |
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|
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#include <boost/type.hpp> |
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|
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namespace boost { namespace python {
|
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|
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namespace detail |
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{
|
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typedef char (&yes_back_reference_t)[1]; |
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typedef char (&no_back_reference_t)[2]; |
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|
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no_back_reference_t is_back_reference_test(...); |
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|
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template<typename T> |
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yes_back_reference_t is_back_reference_test(boost::type< back_reference<T> >); |
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} |
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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( |
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bool, value = ( |
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sizeof(detail::is_back_reference_test(boost::type<T>())) |
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== sizeof(detail::yes_back_reference_t))); |
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}; |
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|
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# endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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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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|
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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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|
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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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|
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}} // namespace boost::python |
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|
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#endif // BACK_REFERENCE_DWA2002510_HPP |