bin_search_tree_/node_iterators.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.
/**
* @file bin_search_tree_/node_iterators.hpp
* Contains an implementation class for bin_search_tree_.
*/
#ifndef PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP
#define PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP
#include <ext/pb_ds/tag_and_trait.hpp>
namespace __gnu_pbds
{
namespace detail
{
#define PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC \
bin_search_tree_const_node_it_<Node, Const_Iterator, Iterator, _Alloc>
/// Const node iterator.
template<typename Node,
class Const_Iterator,
class Iterator,
typename _Alloc>
class bin_search_tree_const_node_it_
{
private:
typedef
typename _Alloc::template rebind<
Node>::other::pointer
node_pointer;
public:
/// Category.
typedef trivial_iterator_tag iterator_category;
/// Difference type.
typedef trivial_iterator_difference_type difference_type;
/// Iterator's value type.
typedef Const_Iterator value_type;
/// Iterator's reference type.
typedef Const_Iterator reference;
/// Iterator's __const reference type.
typedef Const_Iterator const_reference;
/// Metadata type.
typedef typename Node::metadata_type metadata_type;
/// Const metadata reference type.
typedef
typename _Alloc::template rebind<metadata_type>::other::const_reference
metadata_const_reference;
bin_search_tree_const_node_it_(const node_pointer p_nd = 0)
: m_p_nd(const_cast<node_pointer>(p_nd))
{ }
/// Access.
const_reference
operator*() const
{ return Const_Iterator(m_p_nd); }
/// Metadata access.
metadata_const_reference
get_metadata() const
{ return m_p_nd->get_metadata(); }
/// Returns the __const node iterator associated with the left node.
PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC
get_l_child() const
{ return PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(m_p_nd->m_p_left); }
/// Returns the __const node iterator associated with the right node.
PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC
get_r_child() const
{ return PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(m_p_nd->m_p_right); }
/// Compares to a different iterator object.
bool
operator==(const PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC& other) const
{ return m_p_nd == other.m_p_nd; }
/// Compares (negatively) to a different iterator object.
bool
operator!=(const PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC& other) const
{ return m_p_nd != other.m_p_nd; }
node_pointer m_p_nd;
};
#define PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC \
bin_search_tree_node_it_<Node, Const_Iterator, Iterator, _Alloc>
/// Node iterator.
template<typename Node,
class Const_Iterator,
class Iterator,
typename _Alloc>
class bin_search_tree_node_it_
: public PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC
{
private:
typedef
typename _Alloc::template rebind<
Node>::other::pointer
node_pointer;
public:
/// Iterator's value type.
typedef Iterator value_type;
/// Iterator's reference type.
typedef Iterator reference;
/// Iterator's __const reference type.
typedef Iterator const_reference;
inline
bin_search_tree_node_it_(const node_pointer p_nd = 0)
: PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(const_cast<node_pointer>(p_nd))
{ }
/// Access.
Iterator
operator*() const
{ return Iterator(PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd); }
/// Returns the node iterator associated with the left node.
PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC
get_l_child() const
{
return PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC(
PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd->m_p_left);
}
/// Returns the node iterator associated with the right node.
PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC
get_r_child() const
{
return PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC(
PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd->m_p_right);
}
};
#undef PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC
#undef PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC
} // namespace detail
} // namespace __gnu_pbds
#endif // #ifndef PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP