// 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>

 # include <boost/utility.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