Chris@16: // Copyright David Abrahams 2002.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef COPY_CONST_REFERENCE_DWA2002131_HPP
Chris@16: # define COPY_CONST_REFERENCE_DWA2002131_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: # include <boost/python/detail/indirect_traits.hpp>
Chris@16: # include <boost/mpl/if.hpp>
Chris@16: # include <boost/python/to_python_value.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python { 
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16:   template <class R>
Chris@16:   struct copy_const_reference_expects_a_const_reference_return_type
Chris@16: # if defined(__GNUC__) && __GNUC__ >= 3 || defined(__EDG__)
Chris@16:   {}
Chris@16: # endif
Chris@16:   ;
Chris@16: }
Chris@16: 
Chris@16: template <class T> struct to_python_value;
Chris@16: 
Chris@16: struct copy_const_reference
Chris@16: {
Chris@16:     template <class T>
Chris@16:     struct apply
Chris@16:     {
Chris@16:         typedef typename mpl::if_c<
Chris@16:             indirect_traits::is_reference_to_const<T>::value
Chris@16:           , to_python_value<T>
Chris@16:           , detail::copy_const_reference_expects_a_const_reference_return_type<T>
Chris@16:         >::type type;
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #endif // COPY_CONST_REFERENCE_DWA2002131_HPP