slice.h

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/*
  This file is part of MADNESS.

  Copyright (C) 2007,2010 Oak Ridge National Laboratory

  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_TENSOR_SLICE_H__INCLUDED
#define MADNESS_TENSOR_SLICE_H__INCLUDED

#include <madness/tensor/vector_factory.h>

namespace madness {

    class Slice {
        
    public:
        long start;
        long end;
        long step;
        
        inline Slice() : start(0), end(-1), step(1) {};
        inline Slice(long s, long e, long stp=1) : start(s), end(e), step(stp) {};
        inline Slice& operator=(const Slice& s) {
            start=s.start;
            end=s.end;
            step=s.step;
            return *this;
        };
    };

    std::ostream& operator<<(std::ostream& stream, const Slice& s);

    static const Slice _(0,-1,1);       
    static const std::vector<Slice> ___ = vector_factory(_,_,_,_,_,_); 
    static const Slice _reverse(-1,0,-1); 

}
#endif // MADNESS_TENSOR_SLICE_H__INCLUDED