102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
//=======================================================================
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// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
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// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
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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 <boost/graph/adjacency_list.hpp>
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#include <boost/graph/graph_utility.hpp>
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/*
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Sample output:
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original graph:
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0 --> 3 2 3
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1 --> 3
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2 --> 0
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3 --> 2
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1(0,3) 2(0,2) 3(0,3) 4(1,3) 5(2,0) 6(3,2)
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removing edges connecting 0 to 3
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0 --> 2
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1 --> 3
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2 --> 0
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3 --> 2
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2(0,2) 4(1,3) 5(2,0) 6(3,2)
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removing edges with weight greater than 3
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0 --> 2
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1 -->
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2 -->
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3 -->
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2(0,2)
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*/
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using namespace boost;
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typedef adjacency_list< vecS, vecS, bidirectionalS, no_property,
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property< edge_weight_t, int > >
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Graph;
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struct has_weight_greater_than
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{
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has_weight_greater_than(int w_, Graph& g_) : w(w_), g(g_) {}
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bool operator()(graph_traits< Graph >::edge_descriptor e)
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{
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#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
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property_map< Graph, edge_weight_t >::type weight = get(edge_weight, g);
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return get(weight, e) > w;
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#else
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// This version of get() breaks VC++
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return get(edge_weight, g, e) > w;
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#endif
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}
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int w;
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Graph& g;
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};
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int main()
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{
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typedef std::pair< std::size_t, std::size_t > Edge;
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Edge edge_array[6] = { Edge(0, 3), Edge(0, 2), Edge(0, 3), Edge(1, 3),
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Edge(2, 0), Edge(3, 2) };
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#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
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Graph g(4);
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for (std::size_t j = 0; j < 6; ++j)
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add_edge(edge_array[j].first, edge_array[j].second, g);
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#else
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Graph g(edge_array, edge_array + 6, 4);
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#endif
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property_map< Graph, edge_weight_t >::type weight = get(edge_weight, g);
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int w = 0;
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graph_traits< Graph >::edge_iterator ei, ei_end;
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for (boost::tie(ei, ei_end) = edges(g); ei != ei_end; ++ei)
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weight[*ei] = ++w;
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property_map< Graph, vertex_index_t >::type indexmap = get(vertex_index, g);
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std::cout << "original graph:" << std::endl;
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print_graph(g, indexmap);
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print_edges2(g, indexmap, weight);
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std::cout << std::endl;
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std::cout << "removing edges connecting 0 to 3" << std::endl;
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remove_out_edge_if(vertex(0, g), incident_to(vertex(3, g), g), g);
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print_graph(g, indexmap);
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print_edges2(g, indexmap, weight);
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std::cout << "removing edges with weight greater than 3" << std::endl;
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remove_edge_if(has_weight_greater_than(3, g), g);
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print_graph(g, indexmap);
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print_edges2(g, indexmap, weight);
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return 0;
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}
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