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3rdparty/boost_1_81_0/libs/graph/example/reachable-loop-tail.cpp 2.61 KB
977ed18d   Hu Chunming   提交三方库
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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)
  //=======================================================================
  
  /*
     IMPORTANT!!!
     ~~~~~~~~~~~~
     This example uses interfaces that have been deprecated and removed from
     Boost.Grpah. Someone needs to update it, as it does NOT compile.
  */
  
  #include <boost/config.hpp>
  #include <iostream>
  #include <fstream>
  #include <boost/graph/adjacency_list.hpp>
  #include <boost/graph/depth_first_search.hpp>
  #include <boost/graph/graphviz.hpp>
  #include <boost/graph/copy.hpp>
  #include <boost/graph/reverse_graph.hpp>
  
  int main(int argc, char* argv[])
  {
      if (argc < 3)
      {
          std::cerr << "usage: reachable-loop-tail.exe <in-file> <out-file>"
                    << std::endl;
          return -1;
      }
      using namespace boost;
      GraphvizDigraph g_in;
      read_graphviz(argv[1], g_in);
  
      typedef adjacency_list< vecS, vecS, bidirectionalS, GraphvizVertexProperty,
          GraphvizEdgeProperty, GraphvizGraphProperty >
          Graph;
      Graph g;
      copy_graph(g_in, g);
  
      graph_traits< GraphvizDigraph >::vertex_descriptor loop_tail = 6;
      typedef color_traits< default_color_type > Color;
      default_color_type c;
  
      std::vector< default_color_type > reachable_to_tail(num_vertices(g));
      reverse_graph< Graph > reverse_g(g);
      depth_first_visit(reverse_g, loop_tail, default_dfs_visitor(),
          make_iterator_property_map(
              reachable_to_tail.begin(), get(vertex_index, g), c));
  
      std::ofstream loops_out(argv[2]);
      loops_out << "digraph G {\n"
                << "  graph [ratio=\"fill\",size=\"3,3\"];\n"
                << "  node [shape=\"box\"];\n"
                << "  edge [style=\"bold\"];\n";
  
      property_map< Graph, vertex_attribute_t >::type vattr_map
          = get(vertex_attribute, g);
      graph_traits< GraphvizDigraph >::vertex_iterator i, i_end;
      for (boost::tie(i, i_end) = vertices(g_in); i != i_end; ++i)
      {
          loops_out << *i << "[label=\"" << vattr_map[*i]["label"] << "\"";
          if (reachable_to_tail[*i] != Color::white())
          {
              loops_out << ", color=\"gray\", style=\"filled\"";
          }
          loops_out << "]\n";
      }
      graph_traits< GraphvizDigraph >::edge_iterator e, e_end;
      for (boost::tie(e, e_end) = edges(g_in); e != e_end; ++e)
          loops_out << source(*e, g) << " -> " << target(*e, g) << ";\n";
      loops_out << "}\n";
      return EXIT_SUCCESS;
  }