//
|
//=======================================================================
|
// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
|
// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
|
//
|
// Distributed under 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 BOOST_GRAPH_DETAIL_INCIDENCE_ITERATOR_HPP
|
#define BOOST_GRAPH_DETAIL_INCIDENCE_ITERATOR_HPP
|
|
#include <utility>
|
#include <iterator>
|
|
// OBSOLETE
|
|
namespace boost
|
{
|
|
namespace detail
|
{
|
// EdgeDir tags
|
struct in_edge_tag
|
{
|
};
|
struct out_edge_tag
|
{
|
};
|
|
template < class Vertex, class Edge, class Iterator1D, class EdgeDir >
|
struct bidir_incidence_iterator
|
{
|
typedef bidir_incidence_iterator self;
|
typedef Edge edge_type;
|
typedef typename Edge::property_type EdgeProperty;
|
|
public:
|
typedef int difference_type;
|
typedef std::forward_iterator_tag iterator_category;
|
typedef edge_type reference;
|
typedef edge_type value_type;
|
typedef value_type* pointer;
|
inline bidir_incidence_iterator() {}
|
inline bidir_incidence_iterator(Iterator1D ii, Vertex src)
|
: i(ii), _src(src)
|
{
|
}
|
|
inline self& operator++()
|
{
|
++i;
|
return *this;
|
}
|
inline self operator++(int)
|
{
|
self tmp = *this;
|
++(*this);
|
return tmp;
|
}
|
|
inline reference operator*() const { return deref_helper(EdgeDir()); }
|
inline self* operator->() { return this; }
|
|
Iterator1D& iter() { return i; }
|
const Iterator1D& iter() const { return i; }
|
|
Iterator1D i;
|
Vertex _src;
|
|
protected:
|
inline reference deref_helper(out_edge_tag) const
|
{
|
return edge_type(_src, (*i).get_target(), &(*i).get_property());
|
}
|
inline reference deref_helper(in_edge_tag) const
|
{
|
return edge_type((*i).get_target(), _src, &(*i).get_property());
|
}
|
};
|
|
template < class V, class E, class Iter, class Dir >
|
inline bool operator==(const bidir_incidence_iterator< V, E, Iter, Dir >& x,
|
const bidir_incidence_iterator< V, E, Iter, Dir >& y)
|
{
|
return x.i == y.i;
|
}
|
template < class V, class E, class Iter, class Dir >
|
inline bool operator!=(const bidir_incidence_iterator< V, E, Iter, Dir >& x,
|
const bidir_incidence_iterator< V, E, Iter, Dir >& y)
|
{
|
return x.i != y.i;
|
}
|
|
}
|
}
|
#endif
|
