// 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 SCOPE_DWA2002724_HPP

# define SCOPE_DWA2002724_HPP

# include <boost/python/detail/prefix.hpp>

# include <boost/python/object.hpp>

# include <boost/python/refcount.hpp>

namespace boost { namespace python {

namespace detail

{

// Making this a namespace-scope variable to avoid Cygwin issues.

// Use a PyObject* to avoid problems with static destruction after Py_Finalize

extern BOOST_PYTHON_DECL PyObject* current_scope;

}

class scope

: public object

{

public:

inline scope(scope const&);

inline scope(object const&);

inline scope();

inline ~scope();

private: // data members

PyObject* m_previous_scope;

private: // unimplemented functions

void operator=(scope const&);

};

inline scope::scope(object const& new_scope)

: object(new_scope)

, m_previous_scope(detail::current_scope)

{

detail::current_scope = python::incref(new_scope.ptr());

}

inline scope::scope()

: object(detail::borrowed_reference(

detail::current_scope ? detail::current_scope : Py_None

))

, m_previous_scope(python::xincref(detail::current_scope))

{

}

inline scope::~scope()

{

python::xdecref(detail::current_scope);

detail::current_scope = m_previous_scope;

}

namespace converter

{

template <>

struct object_manager_traits<scope>

: object_manager_traits<object>

{

};

}

// Placing this after the specialization above suppresses a CWPro8.3 bug

inline scope::scope(scope const& new_scope)

: object(new_scope)

, m_previous_scope(detail::current_scope)

{

detail::current_scope = python::incref(new_scope.ptr());

}

}} // namespace boost::python

#endif // SCOPE_DWA2002724_HPP