1 files changed, 89 insertions, 0 deletions
diff --git a/src/boost/libs/graph/example/dijkstra-example.cpp b/src/boost/libs/graph/example/dijkstra-example.cpp
new file mode 100644
index 000000000..62b55120a
--- /dev/null
+++ b/src/boost/libs/graph/example/dijkstra-example.cpp
@@ -0,0 +1,89 @@
+//=======================================================================
+// 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/config.hpp>
+#include <iostream>
+#include <fstream>
+
+#include <boost/graph/graph_traits.hpp>
+#include <boost/graph/adjacency_list.hpp>
+#include <boost/graph/dijkstra_shortest_paths.hpp>
+#include <boost/property_map/property_map.hpp>
+
+using namespace boost;
+
+int main(int, char*[])
+{
+    typedef adjacency_list< listS, vecS, directedS, no_property,
+        property< edge_weight_t, int > >
+        graph_t;
+    typedef graph_traits< graph_t >::vertex_descriptor vertex_descriptor;
+    typedef std::pair< int, int > Edge;
+
+    const int num_nodes = 5;
+    enum nodes
+    {
+        A,
+        B,
+        C,
+        D,
+        E
+    };
+    char name[] = "ABCDE";
+    Edge edge_array[] = { Edge(A, C), Edge(B, B), Edge(B, D), Edge(B, E),
+        Edge(C, B), Edge(C, D), Edge(D, E), Edge(E, A), Edge(E, B) };
+    int weights[] = { 1, 2, 1, 2, 7, 3, 1, 1, 1 };
+    int num_arcs = sizeof(edge_array) / sizeof(Edge);
+    graph_t g(edge_array, edge_array + num_arcs, weights, num_nodes);
+    property_map< graph_t, edge_weight_t >::type weightmap
+        = get(edge_weight, g);
+    std::vector< vertex_descriptor > p(num_vertices(g));
+    std::vector< int > d(num_vertices(g));
+    vertex_descriptor s = vertex(A, g);
+
+    dijkstra_shortest_paths(g, s,
+        predecessor_map(boost::make_iterator_property_map(
+                            p.begin(), get(boost::vertex_index, g)))
+            .distance_map(boost::make_iterator_property_map(
+                d.begin(), get(boost::vertex_index, g))));
+
+    std::cout << "distances and parents:" << std::endl;
+    graph_traits< graph_t >::vertex_iterator vi, vend;
+    for (boost::tie(vi, vend) = vertices(g); vi != vend; ++vi)
+    {
+        std::cout << "distance(" << name[*vi] << ") = " << d[*vi] << ", ";
+        std::cout << "parent(" << name[*vi] << ") = " << name[p[*vi]]
+                  << std::endl;
+    }
+    std::cout << std::endl;
+
+    std::ofstream dot_file("figs/dijkstra-eg.dot");
+
+    dot_file << "digraph D {\n"
+             << "  rankdir=LR\n"
+             << "  size=\"4,3\"\n"
+             << "  ratio=\"fill\"\n"
+             << "  edge[style=\"bold\"]\n"
+             << "  node[shape=\"circle\"]\n";
+
+    graph_traits< graph_t >::edge_iterator ei, ei_end;
+    for (boost::tie(ei, ei_end) = edges(g); ei != ei_end; ++ei)
+    {
+        graph_traits< graph_t >::edge_descriptor e = *ei;
+        graph_traits< graph_t >::vertex_descriptor u = source(e, g),
+                                                   v = target(e, g);
+        dot_file << name[u] << " -> " << name[v] << "[label=\""
+                 << get(weightmap, e) << "\"";
+        if (p[v] == u)
+            dot_file << ", color=\"black\"";
+        else
+            dot_file << ", color=\"grey\"";
+        dot_file << "]";
+    }
+    dot_file << "}";
+    return EXIT_SUCCESS;
+}