#include <boost/move/move.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/mpl/if.hpp>
#include <boost/type_traits/aligned_storage.hpp>
#include <boost/type_traits/is_class.hpp>
#include <cassert>


enum ConstructionType { Copied, Moved, Other };

class conversion_source
{
   public:
   conversion_source(){}
   operator int() const { return 0; }
};

class conversion_target
{
   ConstructionType c_type_;
   public:
   conversion_target(conversion_source)
      { c_type_ = Other; }
   conversion_target()
      { c_type_ = Other; }
   conversion_target(const conversion_target &)
      { c_type_ = Copied; }
   ConstructionType construction_type() const
      { return c_type_; }
};


class conversion_target_copymovable
{
   ConstructionType c_type_;
   BOOST_COPYABLE_AND_MOVABLE(conversion_target_copymovable)
   public:
   conversion_target_copymovable()
      { c_type_ = Other; }
   conversion_target_copymovable(conversion_source)
      { c_type_ = Other; }
   conversion_target_copymovable(const conversion_target_copymovable &)
      { c_type_ = Copied; }
   conversion_target_copymovable(BOOST_RV_REF(conversion_target_copymovable) )
      { c_type_ = Moved; }
   conversion_target_copymovable &operator=(BOOST_RV_REF(conversion_target_copymovable) )
      { c_type_ = Moved; return *this; }
   conversion_target_copymovable &operator=(BOOST_COPY_ASSIGN_REF(conversion_target_copymovable) )
      { c_type_ = Copied; return *this; }
   ConstructionType construction_type() const
      {  return c_type_; }
};

class conversion_target_movable
{
   ConstructionType c_type_;
   BOOST_MOVABLE_BUT_NOT_COPYABLE(conversion_target_movable)
   public:
   conversion_target_movable()
      { c_type_ = Other; }
   conversion_target_movable(conversion_source)
      { c_type_ = Other; }
   conversion_target_movable(BOOST_RV_REF(conversion_target_movable) )
      { c_type_ = Moved; }
   conversion_target_movable &operator=(BOOST_RV_REF(conversion_target_movable) )
      { c_type_ = Moved; return *this; }
   ConstructionType construction_type() const
      {  return c_type_; }
};

struct not_a_type;

#if defined(BOOST_NO_RVALUE_REFERENCES)
#define BOOST_MOVE_CATCH_CONST(U)  \
   typename ::boost::mpl::if_< ::boost::is_class<T>, BOOST_CATCH_CONST_RLVALUE(U), const U &>::type
#define BOOST_MOVE_CATCH_RVALUE(U)\
   typename ::boost::mpl::if_< ::boost::is_class<T>, BOOST_RV_REF(T), not_a_type>::type
#else
#define BOOST_MOVE_CATCH_CONST(U)  BOOST_CATCH_CONST_RLVALUE(U)
#define BOOST_MOVE_CATCH_RVALUE(U) BOOST_RV_REF(U)
#endif


template<class T>
class container
{
   typename ::boost::aligned_storage<sizeof(T), ::boost::alignment_of<T>::value>::type storage_;
   public:

   void push_back(BOOST_MOVE_CATCH_CONST(T) x)
   {  return priv_push_back(static_cast<const T&>(x)); }

   void push_back(BOOST_MOVE_CATCH_RVALUE(T) x)
   {  return priv_push_back(::boost::move(x));  }

   //Tricks for C++03
   #if defined(BOOST_NO_RVALUE_REFERENCES)
   void push_back(T &x)
   { priv_push_back(const_cast<const T &>(x)); }

   template<class U>
   typename ::boost::enable_if_c
                     <  ::boost::is_class<T>::value &&
                        ::boost::is_same<T, U>::value &&
                        !::boost::has_move_emulation_enabled<U>::value
                     >::type
   push_back(const U &u)
   { return priv_push_back(u); }

   template<class U>
   typename ::boost::enable_if_c
                     <  ::boost::is_class<U>::value   &&
                       !::boost::is_same<T, U>::value &&
                       !::boost::move_detail::is_rv<U>::value
                     >::type
   push_back(const U &u)
   {
      T t(u);
      priv_push_back(::boost::move(t));
   }

   #endif

   ConstructionType construction_type() const
      {  return construction_type_impl(typename ::boost::is_class<T>::type()); }
   ConstructionType construction_type_impl(::boost::true_type) const
      {  return reinterpret_cast<const T&>(storage_).construction_type(); }
   ConstructionType construction_type_impl(::boost::false_type) const
      {  return Copied; }

   private:

   template<class U>
   void priv_push_back(BOOST_FWD_REF(U) x)
      { new (&storage_) T(::boost::forward<U>(x)); }
};


int main()
{
   conversion_target_movable a;
   conversion_target_movable b(::boost::move(a));
   {
      container<conversion_target> c;
      {
         conversion_target x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         const conversion_target x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         c.push_back(conversion_target());
         assert(c.construction_type() == Copied);
      }
      {
         conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         const conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         c.push_back(conversion_source());
         assert(c.construction_type() == Copied);
      }
   }

   {
      container<conversion_target_copymovable> c;
      {
         conversion_target_copymovable x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         const conversion_target_copymovable x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         c.push_back(conversion_target_copymovable());
         assert(c.construction_type() == Moved);
      }
      {
         conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Moved);
      }
      {
         const conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Moved);
      }
      {
         c.push_back(conversion_source());
         assert(c.construction_type() == Moved);
      }
   }
   {
      container<conversion_target_movable> c;
      //This should not compile
      {/*
         conversion_target_movable x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         const conversion_target_movable x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      */}
      {
         c.push_back(conversion_target_movable());
         assert(c.construction_type() == Moved);
      }
      {
         conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Moved);
      }
      {
         const conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Moved);
      }
      {
         c.push_back(conversion_source());
         assert(c.construction_type() == Moved);
      }
   }
   {
      container<int> c;
      {
         int x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         const int x = 0;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         c.push_back(int(0));
         assert(c.construction_type() == Copied);
      }
      {
         conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }

      {
         const conversion_source x;
         c.push_back(x);
         assert(c.construction_type() == Copied);
      }
      {
         c.push_back(conversion_source());
         assert(c.construction_type() == Copied);
      }
   }

   return 0;
}