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