Imported existing code

libraries/include/boost/graph/reverse_graph.hpp

@@ -0,0 +1,325 @@
+//  (C) Copyright David Abrahams 2000.
+// 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 REVERSE_GRAPH_DWA092300_H_
+# define REVERSE_GRAPH_DWA092300_H_
+
+#include <boost/graph/adjacency_iterator.hpp>
+#include <boost/graph/properties.hpp>
+#include <boost/tuple/tuple.hpp>
+
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+// Stay out of the way of the concept checking class
+# define BidirectionalGraph BidirectionalGraph_
+#endif
+
+namespace boost {
+
+struct reverse_graph_tag { };
+
+  namespace detail {
+
+    template <bool isEdgeList> struct choose_rev_edge_iter { };
+    template <> struct choose_rev_edge_iter<true> {
+      template <class G> struct bind_ {
+        typedef typename graph_traits<G>::edge_iterator type;
+      };
+    };
+    template <> struct choose_rev_edge_iter<false> {
+      template <class G> struct bind_ {
+        typedef void type;
+      };
+    };
+
+  } // namespace detail
+
+template <class BidirectionalGraph, class GraphRef = const BidirectionalGraph&>
+class reverse_graph {
+    typedef reverse_graph<BidirectionalGraph, GraphRef> Self;
+    typedef graph_traits<BidirectionalGraph> Traits;
+ public:
+    typedef BidirectionalGraph base_type;
+
+    // Constructor
+    reverse_graph(GraphRef g) : m_g(g) {}
+
+    // Graph requirements
+    typedef typename Traits::vertex_descriptor vertex_descriptor;
+    typedef typename Traits::edge_descriptor edge_descriptor;
+    typedef typename Traits::directed_category directed_category;
+    typedef typename Traits::edge_parallel_category edge_parallel_category;
+    typedef typename Traits::traversal_category traversal_category;
+
+    // IncidenceGraph requirements
+    typedef typename Traits::in_edge_iterator out_edge_iterator;
+    typedef typename Traits::degree_size_type degree_size_type;
+
+    // BidirectionalGraph requirements
+    typedef typename Traits::out_edge_iterator in_edge_iterator;
+
+    // AdjacencyGraph requirements
+  typedef typename adjacency_iterator_generator<Self,
+    vertex_descriptor, out_edge_iterator>::type adjacency_iterator;
+
+    // VertexListGraph requirements
+    typedef typename Traits::vertex_iterator vertex_iterator;
+
+    // EdgeListGraph requirements
+    enum { is_edge_list = is_convertible<traversal_category,
+           edge_list_graph_tag>::value };
+    typedef detail::choose_rev_edge_iter<is_edge_list> ChooseEdgeIter;
+    typedef typename ChooseEdgeIter::
+      template bind_<BidirectionalGraph>::type   edge_iterator;
+    typedef typename Traits::vertices_size_type vertices_size_type;
+    typedef typename Traits::edges_size_type edges_size_type;
+
+    // More typedefs used by detail::edge_property_map, vertex_property_map
+    typedef typename boost::edge_property_type<BidirectionalGraph>::type
+      edge_property_type;
+    typedef typename boost::vertex_property_type<BidirectionalGraph>::type
+      vertex_property_type;
+    typedef reverse_graph_tag graph_tag;
+
+#ifndef BOOST_GRAPH_NO_BUNDLED_PROPERTIES
+    // Bundled properties support
+    template<typename Descriptor>
+    typename graph::detail::bundled_result<BidirectionalGraph, 
+                                           Descriptor>::type&
+    operator[](Descriptor x)
+    { return m_g[x]; }
+
+    template<typename Descriptor>
+    typename graph::detail::bundled_result<BidirectionalGraph, 
+                                           Descriptor>::type const&
+    operator[](Descriptor x) const
+    { return m_g[x]; }
+#endif // BOOST_GRAPH_NO_BUNDLED_PROPERTIES
+
+    static vertex_descriptor null_vertex()
+    { return Traits::null_vertex(); }
+
+    // would be private, but template friends aren't portable enough.
+ // private:
+    GraphRef m_g;
+};
+
+#ifndef BOOST_GRAPH_NO_BUNDLED_PROPERTIES
+  template<typename Graph, typename GraphRef>
+  struct vertex_bundle_type<reverse_graph<Graph, GraphRef> > 
+    : vertex_bundle_type<Graph> { };
+
+  template<typename Graph, typename GraphRef>
+  struct edge_bundle_type<reverse_graph<Graph, GraphRef> > 
+    : edge_bundle_type<Graph> { };
+#endif // BOOST_GRAPH_NO_BUNDLED_PROPERTIES
+
+template <class BidirectionalGraph>
+inline reverse_graph<BidirectionalGraph>
+make_reverse_graph(const BidirectionalGraph& g)
+{
+    return reverse_graph<BidirectionalGraph>(g);
+}
+
+template <class BidirectionalGraph>
+inline reverse_graph<BidirectionalGraph, BidirectionalGraph&>
+make_reverse_graph(BidirectionalGraph& g)
+{
+    return reverse_graph<BidirectionalGraph, BidirectionalGraph&>(g);
+}
+
+template <class BidirectionalGraph, class GRef>
+std::pair<typename reverse_graph<BidirectionalGraph>::vertex_iterator,
+          typename reverse_graph<BidirectionalGraph>::vertex_iterator>
+vertices(const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return vertices(g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+std::pair<typename reverse_graph<BidirectionalGraph>::edge_iterator,
+          typename reverse_graph<BidirectionalGraph>::edge_iterator>
+edges(const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return edges(g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+inline std::pair<typename graph_traits<BidirectionalGraph>::in_edge_iterator,
+                 typename graph_traits<BidirectionalGraph>::in_edge_iterator>
+out_edges(const typename graph_traits<BidirectionalGraph>::vertex_descriptor u,
+          const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return in_edges(u, g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+inline typename graph_traits<BidirectionalGraph>::vertices_size_type
+num_vertices(const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return num_vertices(g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+inline typename reverse_graph<BidirectionalGraph>::edges_size_type
+num_edges(const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return num_edges(g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+inline typename graph_traits<BidirectionalGraph>::degree_size_type
+out_degree(const typename graph_traits<BidirectionalGraph>::vertex_descriptor u,
+           const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return in_degree(u, g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+inline std::pair<typename graph_traits<BidirectionalGraph>::edge_descriptor, 
+                 bool>
+edge(const typename graph_traits<BidirectionalGraph>::vertex_descriptor u,
+     const typename graph_traits<BidirectionalGraph>::vertex_descriptor v,
+     const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return edge(v, u, g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+inline std::pair<typename graph_traits<BidirectionalGraph>::out_edge_iterator,
+                 typename graph_traits<BidirectionalGraph>::out_edge_iterator>
+in_edges(const typename graph_traits<BidirectionalGraph>::vertex_descriptor u,
+         const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return out_edges(u, g.m_g);
+}
+
+template <class BidirectionalGraph, class GRef>
+inline std::pair<typename reverse_graph<BidirectionalGraph,GRef>::adjacency_iterator,
+    typename reverse_graph<BidirectionalGraph,GRef>::adjacency_iterator>
+adjacent_vertices(typename graph_traits<BidirectionalGraph>::vertex_descriptor u,
+                  const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    typedef reverse_graph<BidirectionalGraph,GRef> Graph;
+    typename graph_traits<Graph>::out_edge_iterator first, last;
+    tie(first, last) = out_edges(u, g);
+    typedef typename graph_traits<Graph>::adjacency_iterator adjacency_iterator;
+    return std::make_pair(adjacency_iterator(first, const_cast<Graph*>(&g)),
+                          adjacency_iterator(last, const_cast<Graph*>(&g)));
+}
+
+template <class BidirectionalGraph, class GRef>
+inline typename graph_traits<BidirectionalGraph>::degree_size_type
+in_degree(const typename graph_traits<BidirectionalGraph>::vertex_descriptor u,
+          const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return out_degree(u, g.m_g);
+}
+
+template <class Edge, class BidirectionalGraph, class GRef>
+inline typename graph_traits<BidirectionalGraph>::vertex_descriptor
+source(const Edge& e, const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return target(e, g.m_g);
+}
+
+template <class Edge, class BidirectionalGraph, class GRef>
+inline typename graph_traits<BidirectionalGraph>::vertex_descriptor
+target(const Edge& e, const reverse_graph<BidirectionalGraph,GRef>& g)
+{
+    return source(e, g.m_g);
+}
+
+
+namespace detail {
+
+  struct reverse_graph_vertex_property_selector {
+    template <class ReverseGraph, class Property, class Tag>
+    struct bind_ {
+      typedef typename ReverseGraph::base_type Graph;
+      typedef property_map<Graph, Tag> PMap;
+      typedef typename PMap::type type;
+      typedef typename PMap::const_type const_type;
+    };
+  };
+
+  struct reverse_graph_edge_property_selector {
+    template <class ReverseGraph, class Property, class Tag>
+    struct bind_ {
+      typedef typename ReverseGraph::base_type Graph;
+      typedef property_map<Graph, Tag> PMap;
+      typedef typename PMap::type type;
+      typedef typename PMap::const_type const_type;
+    };
+  };
+
+} // namespace detail
+
+template <>
+struct vertex_property_selector<reverse_graph_tag> {
+  typedef detail::reverse_graph_vertex_property_selector type;
+};
+
+template <>
+struct edge_property_selector<reverse_graph_tag> {
+  typedef detail::reverse_graph_edge_property_selector type;
+};
+
+template <class BidirGraph, class GRef, class Property>
+typename property_map<BidirGraph, Property>::type
+get(Property p, reverse_graph<BidirGraph,GRef>& g)
+{
+  return get(p, g.m_g);
+}
+
+template <class BidirGraph, class GRef, class Property>
+typename property_map<BidirGraph, Property>::const_type
+get(Property p, const reverse_graph<BidirGraph,GRef>& g)
+{
+  const BidirGraph& gref = g.m_g; // in case GRef is non-const
+  return get(p, gref);
+}
+
+template <class BidirectionalGraph, class GRef, class Property, class Key>
+typename property_traits<
+  typename property_map<BidirectionalGraph, Property>::const_type
+>::value_type
+get(Property p, const reverse_graph<BidirectionalGraph,GRef>& g, const Key& k)
+{
+  return get(p, g.m_g, k);
+}
+
+template <class BidirectionalGraph, class GRef, class Property, class Key, class Value>
+void
+put(Property p, const reverse_graph<BidirectionalGraph,GRef>& g, const Key& k,
+    const Value& val)
+{
+  put(p, g.m_g, k, val);
+}
+
+template<typename BidirectionalGraph, typename GRef, typename Tag,
+         typename Value>
+inline void
+set_property(const reverse_graph<BidirectionalGraph,GRef>& g, Tag tag, 
+             const Value& value)
+{
+  set_property(g.m_g, tag, value);
+}
+
+template<typename BidirectionalGraph, typename GRef, typename Tag>
+inline
+typename graph_property<BidirectionalGraph, Tag>::type
+get_property(const reverse_graph<BidirectionalGraph,GRef>& g, Tag tag)
+{
+  return get_property(g.m_g, tag);
+}
+
+} // namespace boost
+
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+// Stay out of the way of the concept checking class
+# undef BidirectionalGraph
+#endif
+
+#endif