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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;
};