// (C) Copyright François Faure, iMAGIS-GRAVIR / UJF, 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)

 //

 // Revision History:

 // 03 May 2001   Jeremy Siek

 //      Generalized the property map iterator and moved that

 //      part to boost/property_map.hpp. Also modified to

 //      differentiate between const/mutable graphs and

 //      added a workaround to avoid partial specialization.

 // 02 May 2001   François Faure

 //     Initial version.

 #ifndef BOOST_GRAPH_PROPERTY_ITER_RANGE_HPP

 #define BOOST_GRAPH_PROPERTY_ITER_RANGE_HPP

 #include <boost/property_map_iterator.hpp>

 #include <boost/graph/properties.hpp>

 #include <boost/pending/ct_if.hpp>

 #include <boost/type_traits/same_traits.hpp>

 namespace boost {

 //======================================================================

 // graph property iterator range

   template <class Graph, class PropertyTag>

   class graph_property_iter_range {

     typedef typename property_map<Graph, PropertyTag>::type map_type;

     typedef typename property_map<Graph, PropertyTag>::const_type 

       const_map_type;

     typedef typename property_kind<PropertyTag>::type Kind;

     typedef typename ct_if<is_same<Kind, vertex_property_tag>::value,

        typename graph_traits<Graph>::vertex_iterator,

        typename graph_traits<Graph>::edge_iterator>::type iter;

   public:

     typedef typename property_map_iterator_generator<map_type, iter>::type 

       iterator;

     typedef typename property_map_iterator_generator<const_map_type, iter>

       ::type const_iterator;

     typedef std::pair<iterator, iterator> type;

     typedef std::pair<const_iterator, const_iterator> const_type;

   };

   namespace detail {

     template<class Graph,class Tag>

     typename graph_property_iter_range<Graph,Tag>::type

     get_property_iter_range_kind(Graph& graph, const Tag& tag, 

                                  const vertex_property_tag& )

     {

       typedef typename graph_property_iter_range<Graph,Tag>::iterator iter;

       return std::make_pair(iter(vertices(graph).first, get(tag, graph)),

                             iter(vertices(graph).second, get(tag, graph)));

     }

     template<class Graph,class Tag>

     typename graph_property_iter_range<Graph,Tag>::const_type

     get_property_iter_range_kind(const Graph& graph, const Tag& tag, 

                                  const vertex_property_tag& )

     {

       typedef typename graph_property_iter_range<Graph,Tag>

         ::const_iterator iter;

       return std::make_pair(iter(vertices(graph).first, get(tag, graph)),

                             iter(vertices(graph).second, get(tag, graph)));

     }

     template<class Graph,class Tag>

     typename graph_property_iter_range<Graph,Tag>::type

     get_property_iter_range_kind(Graph& graph, const Tag& tag, 

                                  const edge_property_tag& )

     {

       typedef typename graph_property_iter_range<Graph,Tag>::iterator iter;

       return std::make_pair(iter(edges(graph).first, get(tag, graph)),

                             iter(edges(graph).second, get(tag, graph)));

     }

     template<class Graph,class Tag>

     typename graph_property_iter_range<Graph,Tag>::const_type

     get_property_iter_range_kind(const Graph& graph, const Tag& tag, 

                                  const edge_property_tag& )

     {

       typedef typename graph_property_iter_range<Graph,Tag>

         ::const_iterator iter;

       return std::make_pair(iter(edges(graph).first, get(tag, graph)),

                             iter(edges(graph).second, get(tag, graph)));

     }

   } // namespace detail

   //======================================================================

   // get an iterator range of properties

   template<class Graph, class Tag>

   typename graph_property_iter_range<Graph, Tag>::type

   get_property_iter_range(Graph& graph, const Tag& tag)

   {

     typedef typename property_kind<Tag>::type Kind;

     return detail::get_property_iter_range_kind(graph, tag, Kind());

   }

   template<class Graph, class Tag>

   typename graph_property_iter_range<Graph, Tag>::const_type

   get_property_iter_range(const Graph& graph, const Tag& tag)

   {

     typedef typename property_kind<Tag>::type Kind;

     return detail::get_property_iter_range_kind(graph, tag, Kind());

   }

 } // namespace boost

 #endif // BOOST_GRAPH_PROPERTY_ITER_RANGE_HPP