93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
//=======================================================================
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// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee,
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//=======================================================================
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#include <boost/config.hpp>
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#include <iostream>
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#include <fstream>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/graph/breadth_first_search.hpp>
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using namespace boost;
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template < typename Graph, typename VertexNameMap, typename TransDelayMap >
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void build_router_network(
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Graph& g, VertexNameMap name_map, TransDelayMap delay_map)
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{
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typename graph_traits< Graph >::vertex_descriptor a, b, c, d, e;
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a = add_vertex(g);
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name_map[a] = 'a';
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b = add_vertex(g);
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name_map[b] = 'b';
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c = add_vertex(g);
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name_map[c] = 'c';
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d = add_vertex(g);
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name_map[d] = 'd';
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e = add_vertex(g);
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name_map[e] = 'e';
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typename graph_traits< Graph >::edge_descriptor ed;
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bool inserted;
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boost::tie(ed, inserted) = add_edge(a, b, g);
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delay_map[ed] = 1.2;
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boost::tie(ed, inserted) = add_edge(a, d, g);
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delay_map[ed] = 4.5;
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boost::tie(ed, inserted) = add_edge(b, d, g);
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delay_map[ed] = 1.8;
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boost::tie(ed, inserted) = add_edge(c, a, g);
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delay_map[ed] = 2.6;
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boost::tie(ed, inserted) = add_edge(c, e, g);
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delay_map[ed] = 5.2;
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boost::tie(ed, inserted) = add_edge(d, c, g);
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delay_map[ed] = 0.4;
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boost::tie(ed, inserted) = add_edge(d, e, g);
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delay_map[ed] = 3.3;
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}
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template < typename VertexNameMap >
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class bfs_name_printer : public default_bfs_visitor
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{
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// inherit default (empty) event point actions
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public:
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bfs_name_printer(VertexNameMap n_map) : m_name_map(n_map) {}
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template < typename Vertex, typename Graph >
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void discover_vertex(Vertex u, const Graph&) const
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{
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std::cout << get(m_name_map, u) << ' ';
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}
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private:
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VertexNameMap m_name_map;
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};
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struct VP
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{
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char name;
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};
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struct EP
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{
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double weight;
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};
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int main()
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{
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typedef adjacency_list< listS, vecS, directedS, VP, EP > graph_t;
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graph_t g;
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property_map< graph_t, char VP::* >::type name_map = get(&VP::name, g);
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property_map< graph_t, double EP::* >::type delay_map = get(&EP::weight, g);
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build_router_network(g, name_map, delay_map);
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typedef property_map< graph_t, char VP::* >::type VertexNameMap;
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graph_traits< graph_t >::vertex_descriptor a = *vertices(g).first;
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bfs_name_printer< VertexNameMap > vis(name_map);
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std::cout << "BFS vertex discover order: ";
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breadth_first_search(g, a, visitor(vis));
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std::cout << std::endl;
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}
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