tree_policy.hpp

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// -*- C++ -*-

// Copyright (C) 2005-2013 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.

#ifndef PB_DS_TREE_POLICY_HPP
#define PB_DS_TREE_POLICY_HPP

#include <bits/c++config.h>
#include <iterator>
#include <ext/pb_ds/detail/type_utils.hpp>
#include <ext/pb_ds/detail/branch_policy/branch_policy.hpp>

namespace __gnu_pbds
{
#define PB_DS_CLASS_T_DEC \
  template<typename Node_CItr, typename Node_Itr, typename Cmp_Fn, \
       typename _Alloc>

#define PB_DS_CLASS_C_DEC \
  tree_order_statistics_node_update<Node_CItr, Node_Itr, Cmp_Fn, _Alloc>

#define PB_DS_BRANCH_POLICY_BASE \
  detail::branch_policy<Node_CItr, Node_Itr, _Alloc>

  template<typename Node_CItr, typename Node_Itr, 
       typename Cmp_Fn, typename _Alloc>
  class tree_order_statistics_node_update : private PB_DS_BRANCH_POLICY_BASE
  {
  private:
    typedef PB_DS_BRANCH_POLICY_BASE                base_type;

  public:
    typedef Cmp_Fn                  cmp_fn;
    typedef _Alloc                  allocator_type;
    typedef typename allocator_type::size_type      size_type;
    typedef typename base_type::key_type        key_type;
    typedef typename base_type::key_const_reference     key_const_reference;

    typedef size_type                   metadata_type;
    typedef Node_CItr                   node_const_iterator;
    typedef Node_Itr                    node_iterator;
    typedef typename node_const_iterator::value_type    const_iterator;
    typedef typename node_iterator::value_type      iterator;

    inline const_iterator
    find_by_order(size_type) const;

    inline iterator
    find_by_order(size_type);

    inline size_type
    order_of_key(key_const_reference) const;

  private:
    typedef typename base_type::const_reference     const_reference;

    typedef typename base_type::const_pointer       const_pointer;

    typedef typename _Alloc::template rebind<metadata_type>::other __rebind_m;

    typedef typename __rebind_m::const_reference       metadata_const_reference;

    typedef typename __rebind_m::reference      metadata_reference;

    virtual node_const_iterator
    node_begin() const = 0;

    virtual node_iterator
    node_begin() = 0;

    virtual node_const_iterator
    node_end() const = 0;

    virtual node_iterator
    node_end() = 0;

    virtual cmp_fn& 
    get_cmp_fn() = 0;

  protected:
    inline void
    operator()(node_iterator, node_const_iterator) const;

    virtual
    ~tree_order_statistics_node_update();
  };

#include <ext/pb_ds/detail/tree_policy/order_statistics_imp.hpp>

#undef PB_DS_CLASS_T_DEC
#undef PB_DS_CLASS_C_DEC
#undef PB_DS_BRANCH_POLICY_BASE

} // namespace __gnu_pbds

#endif