rb_tree

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// rb_tree extension -*- C++ -*-
 
// Copyright (C) 2002-2026 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) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 *
 * Copyright (c) 1996
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */
 
/** @file ext/rb_tree
 *  This file is a GNU extension to the Standard C++ Library (possibly
 *  containing extensions from the HP/SGI STL subset). 
 */
 
#ifndef _RB_TREE
#define _RB_TREE 1
 
#ifdef _GLIBCXX_SYSHDR
#pragma GCC system_header
#endif
 
#include <bits/requires_hosted.h> // GNU extensions are currently omitted
 
#include <bits/stl_tree.h>
 
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
 
  // Class rb_tree is not part of the C++ standard.  It is provided for
  // compatibility with the HP STL.
 
  /**
   *  This is an SGI extension.
   *  @ingroup SGIextensions
   *  @doctodo
   */
  template <class _Key, class _Value, class _KeyOfValue, class _Compare,
            class _Alloc = std::allocator<_Value> >
    struct rb_tree
    : public std::_Rb_tree<_Key, _Value, _KeyOfValue, _Compare, _Alloc>
    {
      typedef std::_Rb_tree<_Key, _Value, _KeyOfValue, _Compare, _Alloc> _Base;
      typedef typename _Base::allocator_type allocator_type;
 
      rb_tree(const _Compare& __comp = _Compare(),
              const allocator_type& __a = allocator_type())
      : _Base(__comp, __a) { }
 
      ~rb_tree() { }
    };
 
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
 
#endif