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-rw-r--r--src/boost/libs/graph/example/bfs-example2.cpp108
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diff --git a/src/boost/libs/graph/example/bfs-example2.cpp b/src/boost/libs/graph/example/bfs-example2.cpp
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+//=======================================================================
+// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee,
+//
+// 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)
+//=======================================================================
+#include <boost/graph/adjacency_list.hpp>
+#include <boost/graph/breadth_first_search.hpp>
+#include <boost/pending/indirect_cmp.hpp>
+#include <boost/range/irange.hpp>
+#include <boost/property_map/property_map.hpp>
+
+#include <iostream>
+
+using namespace boost;
+template < typename TimeMap > class bfs_time_visitor:public default_bfs_visitor {
+ typedef typename property_traits < TimeMap >::value_type T;
+public:
+ bfs_time_visitor(TimeMap tmap, T & t):m_timemap(tmap), m_time(t) { }
+ template < typename Vertex, typename Graph >
+ void discover_vertex(Vertex u, const Graph & g) const
+ {
+ put(m_timemap, u, m_time++);
+ }
+ TimeMap m_timemap;
+ T & m_time;
+};
+
+
+struct VertexProps {
+ boost::default_color_type color;
+ std::size_t discover_time;
+ unsigned int index;
+};
+
+int
+main()
+{
+ using namespace boost;
+ // Select the graph type we wish to use
+ typedef adjacency_list < listS, listS, undirectedS,
+ VertexProps> graph_t;
+ // Set up the vertex IDs and names
+ enum { r, s, t, u, v, w, x, y, N };
+ const char *name = "rstuvwxy";
+ // Specify the edges in the graph
+ typedef std::pair < int, int >E;
+ E edge_array[] = { E(r, s), E(r, v), E(s, w), E(w, r), E(w, t),
+ E(w, x), E(x, t), E(t, u), E(x, y), E(u, y)
+ };
+ // Create the graph object
+ const int n_edges = sizeof(edge_array) / sizeof(E);
+#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
+ // VC++ has trouble with the edge iterator constructor
+ graph_t g;
+ std::vector<graph_traits<graph_t>::vertex_descriptor> verts;
+ for (std::size_t i = 0; i < N; ++i)
+ verts.push_back(add_vertex(g));
+ for (std::size_t j = 0; j < n_edges; ++j)
+ add_edge(verts[edge_array[j].first], verts[edge_array[j].second], g);
+#else
+ typedef graph_traits<graph_t>::vertices_size_type v_size_t;
+ graph_t g(edge_array, edge_array + n_edges, v_size_t(N));
+#endif
+
+ // Typedefs
+ typedef graph_traits<graph_t>::vertices_size_type Size;
+
+ Size time = 0;
+ typedef property_map<graph_t, std::size_t VertexProps::*>::type dtime_map_t;
+ dtime_map_t dtime_map = get(&VertexProps::discover_time, g);
+ bfs_time_visitor < dtime_map_t > vis(dtime_map, time);
+ breadth_first_search(g, vertex(s, g), color_map(get(&VertexProps::color, g)).
+ visitor(vis));
+
+ // a vector to hold the discover time property for each vertex
+ std::vector < Size > dtime(num_vertices(g));
+ typedef
+ iterator_property_map<std::vector<Size>::iterator,
+ property_map<graph_t, unsigned int VertexProps::*>::type>
+ dtime_pm_type;
+ graph_traits<graph_t>::vertex_iterator vi, vi_end;
+ std::size_t c = 0;
+ for (boost::tie(vi, vi_end) = vertices(g); vi != vi_end; ++vi, ++c) {
+ dtime[c] = dtime_map[*vi];
+ put(&VertexProps::index, g, *vi, c);
+ }
+ dtime_pm_type dtime_pm(dtime.begin(), get(&VertexProps::index, g));
+
+ // Use std::sort to order the vertices by their discover time
+ std::vector<graph_traits<graph_t>::vertices_size_type > discover_order(N);
+ integer_range < int >range(0, N);
+ std::copy(range.begin(), range.end(), discover_order.begin());
+ std::sort(discover_order.begin(), discover_order.end(),
+ make_indirect_cmp(
+ std::less<Size>(),
+ make_iterator_property_map(
+ dtime.begin(),
+ typed_identity_property_map<std::size_t>())));
+
+ std::cout << "order of discovery: ";
+ for (int i = 0; i < N; ++i)
+ std::cout << name[discover_order[i]] << " ";
+ std::cout << std::endl;
+
+ return EXIT_SUCCESS;
+}