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- #ifndef BORROWED_PTR_DWA20020601_HPP
- # define BORROWED_PTR_DWA20020601_HPP
- // 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)
- # include <boost/config.hpp>
- # include <boost/type.hpp>
- # include <boost/mpl/if.hpp>
- # include <boost/python/detail/type_traits.hpp>
- # include <boost/python/tag.hpp>
- namespace boost { namespace python { namespace detail {
- template<class T> class borrowed
- {
- typedef T type;
- };
- template<typename T>
- struct is_borrowed_ptr
- {
- BOOST_STATIC_CONSTANT(bool, value = false);
- };
- # if !defined(__MWERKS__) || __MWERKS__ > 0x3000
- template<typename T>
- struct is_borrowed_ptr<borrowed<T>*>
- {
- BOOST_STATIC_CONSTANT(bool, value = true);
- };
- template<typename T>
- struct is_borrowed_ptr<borrowed<T> const*>
- {
- BOOST_STATIC_CONSTANT(bool, value = true);
- };
- template<typename T>
- struct is_borrowed_ptr<borrowed<T> volatile*>
- {
- BOOST_STATIC_CONSTANT(bool, value = true);
- };
- template<typename T>
- struct is_borrowed_ptr<borrowed<T> const volatile*>
- {
- BOOST_STATIC_CONSTANT(bool, value = true);
- };
- # else
- template<typename T>
- struct is_borrowed
- {
- BOOST_STATIC_CONSTANT(bool, value = false);
- };
- template<typename T>
- struct is_borrowed<borrowed<T> >
- {
- BOOST_STATIC_CONSTANT(bool, value = true);
- };
- template<typename T>
- struct is_borrowed_ptr<T*>
- : is_borrowed<typename remove_cv<T>::type>
- {
- };
- # endif
- }
- template <class T>
- inline T* get_managed_object(detail::borrowed<T> const volatile* p, tag_t)
- {
- return (T*)p;
- }
- }} // namespace boost::python::detail
- #endif // #ifndef BORROWED_PTR_DWA20020601_HPP
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