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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 const_child_iterator.hpp
* Contains a const_iterator for a patricia tree.
*/
struct const_iterator
{
public:
typedef std::forward_iterator_tag iterator_category;
typedef typename Allocator::difference_type difference_type;
typedef node_pointer value_type;
typedef node_pointer_pointer pointer;
typedef node_pointer_reference reference;
public:
inline
const_iterator(node_pointer_pointer p_p_cur = NULL,
node_pointer_pointer p_p_end = NULL)
: m_p_p_cur(p_p_cur), m_p_p_end(p_p_end)
{ }
inline bool
operator==(const const_iterator& other) const
{ return m_p_p_cur == other.m_p_p_cur; }
inline bool
operator!=(const const_iterator& other) const
{ return m_p_p_cur != other.m_p_p_cur; }
inline const_iterator&
operator++()
{
do
++m_p_p_cur;
while (m_p_p_cur != m_p_p_end&& * m_p_p_cur == NULL);
return *this;
}
inline const_iterator
operator++(int)
{
const_iterator ret_it(*this);
operator++();
return ret_it;
}
const node_pointer_pointer
operator->() const
{
_GLIBCXX_DEBUG_ONLY(assert_referencible();)
return (m_p_p_cur);
}
const_node_pointer
operator*() const
{
_GLIBCXX_DEBUG_ONLY(assert_referencible();)
return (*m_p_p_cur);
}
protected:
#ifdef _GLIBCXX_DEBUG
void
assert_referencible() const
{ _GLIBCXX_DEBUG_ASSERT(m_p_p_cur != m_p_p_end&& * m_p_p_cur != NULL); }
#endif
public:
node_pointer_pointer m_p_p_cur;
node_pointer_pointer m_p_p_end;
};
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