Chris@16: #ifndef OTHER_DWA20020601_HPP
Chris@16: # define OTHER_DWA20020601_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
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: 
Chris@16: # if _MSC_VER+0 >= 1020
Chris@16: #  pragma once
Chris@16: # endif
Chris@16: 
Chris@16: # include <boost/config.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python {
Chris@16: 
Chris@16: template<class T> struct other
Chris@16: { 
Chris@16:     typedef T type;
Chris@16: };
Chris@16: 
Chris@16: # ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
Chris@16: namespace detail
Chris@16: {
Chris@16:   template<typename T>
Chris@16:   class is_other
Chris@16:   {
Chris@16:    public:
Chris@16:       BOOST_STATIC_CONSTANT(bool, value = false); 
Chris@16:   };
Chris@16: 
Chris@16:   template<typename T>
Chris@16:   class is_other<other<T> >
Chris@16:   {
Chris@16:    public:
Chris@16:       BOOST_STATIC_CONSTANT(bool, value = true);
Chris@16:   };
Chris@16: 
Chris@16:   template<typename T>
Chris@16:   class unwrap_other
Chris@16:   {
Chris@16:    public:
Chris@16:       typedef T type;
Chris@16:   };
Chris@16: 
Chris@16:   template<typename T>
Chris@16:   class unwrap_other<other<T> >
Chris@16:   {
Chris@16:    public:
Chris@16:       typedef T type;
Chris@16:   };
Chris@16: }
Chris@16: # else // no partial specialization
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #include <boost/type.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python {
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16:   typedef char (&yes_other_t)[1];
Chris@16:   typedef char (&no_other_t)[2];
Chris@16:       
Chris@16:   no_other_t is_other_test(...);
Chris@16: 
Chris@16:   template<typename T>
Chris@16:   yes_other_t is_other_test(type< other<T> >);
Chris@16: 
Chris@16:   template<bool wrapped>
Chris@16:   struct other_unwrapper
Chris@16:   {
Chris@16:       template <class T>
Chris@16:       struct apply
Chris@16:       {
Chris@16:           typedef T type;
Chris@16:       };
Chris@16:   };
Chris@16: 
Chris@16:   template<>
Chris@16:   struct other_unwrapper<true>
Chris@16:   {
Chris@16:       template <class T>
Chris@16:       struct apply
Chris@16:       {
Chris@16:           typedef typename T::type type;
Chris@16:       };
Chris@16:   };
Chris@16: 
Chris@16:   template<typename T>
Chris@16:   class is_other
Chris@16:   {
Chris@16:    public:
Chris@16:       BOOST_STATIC_CONSTANT(
Chris@16:           bool, value = (
Chris@16:               sizeof(detail::is_other_test(type<T>()))
Chris@16:               == sizeof(detail::yes_other_t)));
Chris@16:   };
Chris@16: 
Chris@16:   template <typename T>
Chris@16:   class unwrap_other
Chris@16:       : public detail::other_unwrapper<
Chris@16:       is_other<T>::value
Chris@16:   >::template apply<T>
Chris@16:   {};
Chris@16: }
Chris@16: 
Chris@16: # endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #endif // #ifndef OTHER_DWA20020601_HPP