// (C) Copyright Jeremy Siek, 2001. | |
// 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) | |
// See http://www.boost.org/libs/property_map for documentation. | |
#ifndef BOOST_PROPERTY_MAP_ITERATOR_HPP | |
#define BOOST_PROPERTY_MAP_ITERATOR_HPP | |
#include <boost/property_map/property_map.hpp> | |
#include <boost/iterator/iterator_adaptor.hpp> | |
#include <boost/mpl/if.hpp> | |
#include <boost/type_traits/is_same.hpp> | |
namespace boost { | |
//====================================================================== | |
// property iterator, generalized from ideas by Francois Faure | |
namespace detail { | |
template <class Iterator, class LvaluePropertyMap> | |
class lvalue_pmap_iter | |
: public iterator_adaptor< lvalue_pmap_iter< Iterator, LvaluePropertyMap >, | |
Iterator, | |
typename property_traits<LvaluePropertyMap>::value_type, | |
use_default, | |
typename property_traits<LvaluePropertyMap>::reference> | |
{ | |
friend class boost::iterator_core_access; | |
typedef iterator_adaptor< lvalue_pmap_iter< Iterator, LvaluePropertyMap >, | |
Iterator, | |
typename property_traits<LvaluePropertyMap>::value_type, | |
use_default, | |
typename property_traits<LvaluePropertyMap>::reference> super_t; | |
public: | |
lvalue_pmap_iter() { } | |
lvalue_pmap_iter(Iterator const& it, | |
LvaluePropertyMap m) | |
: super_t(it), | |
m_map(m) {} | |
private: | |
typename super_t::reference | |
dereference() const | |
{ | |
return m_map[*(this->base_reference())]; | |
} | |
LvaluePropertyMap m_map; | |
}; | |
template <class Iterator, class ReadablePropertyMap> | |
class readable_pmap_iter : | |
public iterator_adaptor< readable_pmap_iter< Iterator, ReadablePropertyMap >, | |
Iterator, | |
typename property_traits<ReadablePropertyMap>::value_type, | |
use_default, | |
typename property_traits<ReadablePropertyMap>::value_type> | |
{ | |
friend class boost::iterator_core_access; | |
typedef iterator_adaptor< readable_pmap_iter< Iterator, ReadablePropertyMap >, | |
Iterator, | |
typename property_traits<ReadablePropertyMap>::value_type, | |
use_default, | |
typename property_traits<ReadablePropertyMap>::value_type> super_t; | |
public: | |
readable_pmap_iter() { } | |
readable_pmap_iter(Iterator const& it, | |
ReadablePropertyMap m) | |
: super_t(it), | |
m_map(m) {} | |
private: | |
typename super_t::reference | |
dereference() const | |
{ | |
return get(m_map, *(this->base_reference())); | |
} | |
ReadablePropertyMap m_map; | |
}; | |
} // namespace detail | |
template <class PropertyMap, class Iterator> | |
struct property_map_iterator_generator : | |
mpl::if_< is_same< typename property_traits<PropertyMap>::category, lvalue_property_map_tag>, | |
detail::lvalue_pmap_iter<Iterator, PropertyMap>, | |
detail::readable_pmap_iter<Iterator, PropertyMap> > | |
{}; | |
template <class PropertyMap, class Iterator> | |
typename property_map_iterator_generator<PropertyMap, Iterator>::type | |
make_property_map_iterator(PropertyMap pmap, Iterator iter) | |
{ | |
typedef typename property_map_iterator_generator<PropertyMap, | |
Iterator>::type Iter; | |
return Iter(iter, pmap); | |
} | |
} // namespace boost | |
#endif // BOOST_PROPERTY_MAP_ITERATOR_HPP | |