<h2>File Contents: //usr/include/c++/8/ext/pb_ds/detail/tree_trace_base.hpp</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='//usr/include/c++/8/ext/pb_ds/detail/tree_trace_base.hpp'><textarea name='file_content' rows='10' cols='50'>// -*- C++ -*-

// Copyright (C) 2005-2018 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
// &lt;http://www.gnu.org/licenses/&gt;.

// 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 &quot;as is&quot; without express or implied
// warranty.

/**
 * @file detail/tree_trace_base.hpp
 * Contains tree-related policies.
 */

#ifndef PB_DS_TREE_TRACE_BASE_HPP
#define PB_DS_TREE_TRACE_BASE_HPP

#ifdef PB_DS_TREE_TRACE

#include &lt;ext/pb_ds/detail/branch_policy/branch_policy.hpp&gt;
#include &lt;ext/pb_ds/detail/branch_policy/null_node_metadata.hpp&gt;

namespace __gnu_pbds
{
  namespace detail
  {
#ifdef PB_DS_TREE_TRACE

#define PB_DS_CLASS_T_DEC						\
    template&lt;typename Node_CItr, typename Node_Itr,	\
	     typename Cmp_Fn, bool Node_Based, typename _Alloc&gt;

#define PB_DS_CLASS_C_DEC						\
    tree_trace_base&lt;Node_CItr, Node_Itr, Cmp_Fn,         \
		    Node_Based, _Alloc&gt;

#define PB_DS_TRACE_BASE \
    branch_policy&lt;Node_CItr, Node_Itr, _Alloc&gt;

    /// Tracing base class.
    template&lt;typename Node_CItr, typename Node_Itr,
	     typename Cmp_Fn, bool Node_Based, typename _Alloc&gt;
    class tree_trace_base : private PB_DS_TRACE_BASE
    {
    public:
      void
      trace() const;

    private:
      typedef PB_DS_TRACE_BASE 			base_type;
      typedef Node_CItr 		node_const_iterator;
      typedef typename _Alloc::size_type 	size_type;

      void
      trace_node(node_const_iterator, size_type) const;

      virtual bool
      empty() const = 0;

      virtual node_const_iterator
      node_begin() const = 0;

      virtual node_const_iterator
      node_end() const = 0;

      static void
      print_node_pointer(Node_CItr, integral_constant&lt;int,true&gt;);

      static void
      print_node_pointer(Node_CItr, integral_constant&lt;int,false&gt;);

      template&lt;typename Metadata_&gt;
      static void
      trace_it_metadata(Node_CItr, type_to_type&lt;Metadata_&gt;);

      static void
      trace_it_metadata(Node_CItr, type_to_type&lt;null_type&gt;);
    };

    PB_DS_CLASS_T_DEC
    void
    PB_DS_CLASS_C_DEC::
    trace() const
    {
      if (empty())
	return;
      trace_node(node_begin(), 0);
    }

    PB_DS_CLASS_T_DEC
    void
    PB_DS_CLASS_C_DEC::
    trace_node(node_const_iterator nd_it, size_type level) const
    {
      if (nd_it.get_r_child() != node_end())
	trace_node(nd_it.get_r_child(), level + 1);

      for (size_type i = 0; i &lt; level; ++i)
	std::cerr &lt;&lt; ' ';

      print_node_pointer(nd_it, integral_constant&lt;int,Node_Based&gt;());
      std::cerr &lt;&lt; base_type::extract_key(*(*nd_it));

      typedef type_to_type&lt;typename node_const_iterator::metadata_type&gt;
	m_type_ind_t;

      trace_it_metadata(nd_it, m_type_ind_t());

      std::cerr &lt;&lt; std::endl;

      if (nd_it.get_l_child() != node_end())
	trace_node(nd_it.get_l_child(), level + 1);
    }

    PB_DS_CLASS_T_DEC
    template&lt;typename Metadata_&gt;
    void
    PB_DS_CLASS_C_DEC::
    trace_it_metadata(Node_CItr nd_it, type_to_type&lt;Metadata_&gt;)
    {
      const unsigned long ul = static_cast&lt;unsigned long&gt;(nd_it.get_metadata());
      std::cerr &lt;&lt; &quot; (&quot; &lt;&lt; ul &lt;&lt; &quot;) &quot;;
    }

    PB_DS_CLASS_T_DEC
    void
    PB_DS_CLASS_C_DEC::
    trace_it_metadata(Node_CItr, type_to_type&lt;null_type&gt;)
    { }

    PB_DS_CLASS_T_DEC
    void
    PB_DS_CLASS_C_DEC::
    print_node_pointer(Node_CItr nd_it, integral_constant&lt;int,true&gt;)
    { std::cerr &lt;&lt; nd_it.m_p_nd &lt;&lt; &quot; &quot;; }

    PB_DS_CLASS_T_DEC
    void
    PB_DS_CLASS_C_DEC::
    print_node_pointer(Node_CItr nd_it, integral_constant&lt;int,false&gt;)
    { std::cerr &lt;&lt; *nd_it &lt;&lt; &quot; &quot;; }

#undef PB_DS_CLASS_T_DEC
#undef PB_DS_CLASS_C_DEC
#undef PB_DS_TRACE_BASE
#endif // #ifdef    PB_DS_TREE_TRACE

  } // namespace detail
} // namespace __gnu_pbds

#endif // #ifdef PB_DS_TREE_TRACE

#endif // #ifndef PB_DS_TREE_TRACE_BASE_HPP
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