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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

// 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

 */

template<typename Size_Type>

class cond_dtor

{

public:

  cond_dtor(value_vector 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(m_a_vec, m_max_size);

  }

  inline void

  set_no_action()

  { m_no_action = true; }

protected:

  value_vector m_a_vec;

  iterator& m_r_last_it;

  const Size_Type m_max_size;

  bool m_no_action;

};