move.h

Go to the documentation of this file.

/*
  This file is part of MADNESS.

  Copyright (C) 2012 Justus Calvin

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

  For more information please contact:

  Robert J. Harrison
  Oak Ridge National Laboratory
  One Bethel Valley Road
  P.O. Box 2008, MS-6367

  email: harrisonrj@ornl.gov
  tel:   865-241-3937
  fax:   865-572-0680


  $Id$
*/

#ifndef MADNESS_WORLD_MOVE_H__INCLUDED
#define MADNESS_WORLD_MOVE_H__INCLUDED

namespace madness {
    namespace detail {


        template <typename T>
        class MoveWrapper {
            T* t_; 

        public:

            MoveWrapper(T& t) : t_(&t) { }


            MoveWrapper(const MoveWrapper<T>& other) : t_(other.t_) { }


            MoveWrapper<T>& operator=(const MoveWrapper<T>& other) {
                t_ = other.t_;
                return *this;
            }


            T& get() const { return *t_; }


            T* get_pointer() const { return t_; }
        }; // class MoveWrapper


        template <typename T>
        struct is_movable : public std::false_type { };


        template <typename T>
        struct is_movable<MoveWrapper<T> > : public std::true_type { };

    } // namspace detail


    template <typename T>
    detail::MoveWrapper<T> move(T& t) { return detail::MoveWrapper<T>(t); }


    template <typename T>
    const T& move(const T& t) { return t; }


    template <typename T>
    T& unwrap_move(const detail::MoveWrapper<T>& t) { return t.get(); }


    template <typename T>
    typename disable_if<detail::is_movable<T>, T&>::type unwrap_move(T& t) { return t; }

} // namespace madness

#endif // MADNESS_WORLD_MOVE_H__INCLUDED