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// -*- C++ -*-

// Copyright (C) 2005 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This 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 2, or (at your option)

// any later version.

// This 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 this library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software

// is hereby granted without fee, provided that the above copyright

// notice appears in all copies, and that both that copyright notice and

// this permission notice appear in supporting documentation. None of

// the above authors, nor IBM Haifa Research Laboratories, make any

// representation about the suitability of this software for any

// purpose. It is provided "as is" without express or implied warranty.

/**

 * @file cond_dtor.hpp

 * Contains a conditional destructor

 */

class cond_dtor

{

public:

  cond_dtor(pointer a_vec, iterator& r_last_it, size_type total_size) : m_a_vec(a_vec),

                                                                        m_r_last_it(r_last_it),

                                                                        m_max_size(total_size),

                                                                        m_no_action(false)

  { }

  ~cond_dtor()

  {

    if (m_no_action)

      return;

    iterator it = m_a_vec;

    while (it != m_r_last_it)

      {

        it->~value_type();

        ++it;

      }

    if (m_max_size > 0)

      value_allocator().deallocate(

                                   const_cast<typename value_allocator::pointer>(m_a_vec),

                                   m_max_size);

  }

  inline void

  set_no_action()

  {

    m_no_action = true;

  }

protected:

  pointer m_a_vec;

  iterator& m_r_last_it;

  const size_type m_max_size;

  bool m_no_action;

};