mirror of
https://github.com/boostorg/iterator.git
synced 2025-05-09 23:23:54 +00:00
77 lines
1.9 KiB
C++
Executable File
77 lines
1.9 KiB
C++
Executable File
// Copyright David Abrahams 2004. Use, modification and distribution is
|
|
// subject to the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
#ifndef NODE_ITERATOR2_DWA2004110_HPP
|
|
# define NODE_ITERATOR2_DWA2004110_HPP
|
|
|
|
# include "node.hpp"
|
|
# include <boost/iterator/iterator_facade.hpp>
|
|
|
|
# ifndef BOOST_NO_SFINAE
|
|
# include <boost/type_traits/is_convertible.hpp>
|
|
# include <boost/utility/enable_if.hpp>
|
|
# endif
|
|
|
|
namespace impl
|
|
{
|
|
template <class Value>
|
|
class node_iterator
|
|
: public boost::iterator_facade<
|
|
node_iterator<Value>
|
|
, Value
|
|
, boost::forward_traversal_tag
|
|
>
|
|
{
|
|
private:
|
|
enum enabler {};
|
|
|
|
public:
|
|
node_iterator()
|
|
: m_node(0)
|
|
{}
|
|
|
|
explicit node_iterator(Value* p)
|
|
: m_node(p)
|
|
{}
|
|
|
|
template <class OtherValue>
|
|
node_iterator(
|
|
node_iterator<OtherValue> const& other
|
|
# ifndef BOOST_NO_SFINAE
|
|
, typename boost::enable_if<boost::is_convertible<OtherValue*,Value*>,enabler*>::type = 0
|
|
# endif
|
|
)
|
|
: m_node(other.m_node)
|
|
{
|
|
}
|
|
|
|
|
|
friend class boost::iterator_core_access;
|
|
# if !BOOST_WORKAROUND(__GNUC__, == 2)
|
|
private: // GCC2 can't even grant that friendship to template member functions
|
|
# endif
|
|
template <class OtherValue>
|
|
bool equal(node_iterator<OtherValue> const& other) const
|
|
{ return this->m_node == other.m_node; }
|
|
|
|
public:
|
|
void increment()
|
|
{ m_node = m_node->next(); }
|
|
|
|
Value& dereference() const
|
|
{ return *m_node; }
|
|
|
|
# ifdef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
|
|
public:
|
|
# else
|
|
template <class> friend class node_iterator;
|
|
# endif
|
|
Value* m_node;
|
|
};
|
|
}
|
|
|
|
typedef impl::node_iterator<node_base> node_iterator;
|
|
typedef impl::node_iterator<node_base const> node_const_iterator;
|
|
|
|
#endif // NODE_ITERATOR2_DWA2004110_HPP
|