VectorConstView.h

#ifndef _theplu_yat_utility_vector_const_view_
#define _theplu_yat_utility_vector_const_view_

// $Id: VectorConstView.h 4207 2022-08-26 04:36:28Z peter $

/*
  Copyright (C) 2003 Daniel Dalevi, Peter Johansson
  Copyright (C) 2004 Jari Häkkinen, Peter Johansson
  Copyright (C) 2005 Jari Häkkinen, Peter Johansson, Markus Ringnér
  Copyright (C) 2006 Jari Häkkinen, Markus Ringnér
  Copyright (C) 2007 Jari Häkkinen, Peter Johansson, Markus Ringnér
  Copyright (C) 2008 Jari Häkkinen, Peter Johansson
  Copyright (C) 2009, 2012, 2017, 2021, 2022 Peter Johansson

  This file is part of the yat library, http://dev.thep.lu.se/trac/yat

  The yat library 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 3 of the
  License, or (at your option) any later version.

  The yat library 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 yat. If not, see <http://www.gnu.org/licenses/>.
*/

#include "VectorBase.h"

#include <gsl/gsl_vector.h>

namespace theplu {
namespace yat {
namespace utility {

  class MatrixBase;
  class VectorView;

  class VectorConstView : public VectorBase
  {
  public:
    // needed to override compiler generated copy constructor
    VectorConstView(const VectorConstView& other);

    VectorConstView(const VectorView& other);

    explicit VectorConstView(const VectorBase& other);

    VectorConstView(const VectorBase& v,size_t offset,size_t n,size_t stride=1);

    VectorConstView(const MatrixBase& m, size_t i, bool row=true);

    explicit VectorConstView(const gsl_vector* v);

    VectorConstView(const double* v, size_t size, size_t stride=1);

    ~VectorConstView(void);

    bool isview(void) const;

  private:
    void copy(const VectorBase& other);
    void delete_allocated_memory(void);

    // Perhaps not needed - only used to create a gsl_vector (that is
    // stored in base class). For data access use data in base class
    // because this pointer may be NULL.
    gsl_vector_const_view* const_view_;

    // assignment not allowed
    VectorConstView& operator=(const VectorConstView&);
  };

}}} // of namespace utility, yat, and theplu

#endif