text: // Copyright David Abrahams 2004. Use, modification and distribution is
  // subject to 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)
  
  #include <boost/pointee.hpp>
  #include <boost/type_traits/add_const.hpp>
  #include "static_assert_same.hpp"
  #include <memory>
  #include <list>
  
  template <class T, class Ref>
  struct proxy_ptr
  {
      typedef T element_type;
      struct proxy
      {
          operator Ref() const;
      };
      proxy operator*() const;
  };
  
  template <class T>
  struct proxy_ref_ptr : proxy_ptr<T,T&>
  {
  };
  
  template <class T>
  struct proxy_value_ptr : proxy_ptr<T,T>
  {
      typedef typename boost::add_const<T>::type element_type;
  };
  
  struct X {
      template <class T> X(T const&);
      template <class T> operator T&() const;
  };
  
      
  int main()
  {
      STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<int> >::type, int);
      STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<X> >::type, X);
  
      STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<int const> >::type, int const);
      STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<X const> >::type, X const);
      
      STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<int> >::type, int const);
      STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<X> >::type, X const);
      
      STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<int const> >::type, int const);
      STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<X const> >::type, X const);
  
      STATIC_ASSERT_SAME(boost::pointee<int*>::type, int);
      STATIC_ASSERT_SAME(boost::pointee<int const*>::type, int const);
      
      STATIC_ASSERT_SAME(boost::pointee<X*>::type, X);
      STATIC_ASSERT_SAME(boost::pointee<X const*>::type, X const);
  
  #if defined(BOOST_NO_CXX11_SMART_PTR)
  
      STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int> >::type, int);
      STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X> >::type, X);
      
      STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int const> >::type, int const);
      STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X const> >::type, X const);
  
  #else
  
      STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<int> >::type, int);
      STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<X> >::type, X);
      
      STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<int const> >::type, int const);
      STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<X const> >::type, X const);
  
  #endif
  
      STATIC_ASSERT_SAME(boost::pointee<std::list<int>::iterator >::type, int);
      STATIC_ASSERT_SAME(boost::pointee<std::list<X>::iterator >::type, X);
      
      STATIC_ASSERT_SAME(boost::pointee<std::list<int>::const_iterator >::type, int const);
      STATIC_ASSERT_SAME(boost::pointee<std::list<X>::const_iterator >::type, X const);
      return 0;
  }
  