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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_key_dtor_entry_dealtor.hpp

 * Contains a conditional key destructor, used for exception handling.

 */

namespace pb_assoc

{

  namespace detail

  {

#define PB_ASSOC_CLASS_T_DEC \

        template<class HT_Map>

#define PB_ASSOC_CLASS_C_DEC \

        PB_ASSOC_CKDED_CLASS_NAME< \

                HT_Map>

    /**

     * A conditional key destructor, used for exception handling.

     **/

    template<class HT_Map>

    class PB_ASSOC_CKDED_CLASS_NAME

    {

    public:

      typedef typename HT_Map::entry entry;

      typedef typename HT_Map::entry_allocator entry_allocator;

      typedef typename HT_Map::key_type key_type;

    public:

      inline

      PB_ASSOC_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e);

      inline

      ~PB_ASSOC_CKDED_CLASS_NAME();

      inline void

      set_key_destruct();

      inline void

      set_no_action_destructor();

    protected:

      entry_allocator* const m_p_a;

      entry* const m_p_e;

      bool m_key_destruct;

      bool m_no_action_destructor;

    };

    PB_ASSOC_CLASS_T_DEC

    inline

    PB_ASSOC_CLASS_C_DEC::

    PB_ASSOC_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e) :

      m_p_a(p_a),

      m_p_e(p_e),

      m_key_destruct(false),

      m_no_action_destructor(false)

    { }

    PB_ASSOC_CLASS_T_DEC

    inline void

    PB_ASSOC_CLASS_C_DEC::

    set_key_destruct()

    {

      m_key_destruct = true;

    }

    PB_ASSOC_CLASS_T_DEC

    inline void

    PB_ASSOC_CLASS_C_DEC::

    set_no_action_destructor()

    {

      m_no_action_destructor = true;

    }

    PB_ASSOC_CLASS_T_DEC

    inline

    PB_ASSOC_CLASS_C_DEC::

    ~PB_ASSOC_CKDED_CLASS_NAME()

    {

      if (m_no_action_destructor)

        return;

      if (m_key_destruct)

        m_p_e->m_value.first.~key_type();

      m_p_a->deallocate(m_p_e, 1);

    }

#undef PB_ASSOC_CLASS_T_DEC

#undef PB_ASSOC_CLASS_C_DEC

  } // namespace detail

} // namespace pb_assoc