67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
//=======================================================================
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// Copyright 2002 Indiana University.
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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/graph/graph_as_tree.hpp>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/cstdlib.hpp>
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#include <iostream>
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class tree_printer {
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public:
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template <typename Node, typename Tree>
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void preorder(Node, Tree&) {
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std::cout << "(";
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}
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template <typename Node, typename Tree>
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void inorder(Node n, Tree& t)
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{
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std::cout << get(boost::vertex_name, t)[n];
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}
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template <typename Node, typename Tree>
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void postorder(Node, Tree&) {
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std::cout << ")";
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}
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};
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int main()
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{
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using namespace boost;
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typedef adjacency_list<vecS, vecS, directedS,
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property<vertex_name_t, std::string> > graph_t;
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typedef graph_traits<graph_t>::vertex_descriptor vertex_t;
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graph_t g;
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vertex_t a = add_vertex(g),
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b = add_vertex(g),
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c = add_vertex(g);
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add_edge(a, b, g);
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add_edge(a, c, g);
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typedef property_map<graph_t, vertex_name_t>::type vertex_name_map_t;
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vertex_name_map_t name = get(vertex_name, g);
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name[a] = "A";
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name[b] = "B";
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name[c] = "C";
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typedef iterator_property_map<std::vector<vertex_t>::iterator,
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property_map<graph_t, vertex_index_t>::type> parent_map_t;
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std::vector<vertex_t> parent(num_vertices(g));
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typedef graph_as_tree<graph_t, parent_map_t> tree_t;
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tree_t t(g, a, make_iterator_property_map(parent.begin(),
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get(vertex_index, g)));
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tree_printer vis;
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traverse_tree(a, t, vis);
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return exit_success;
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}
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