1//=======================================================================
2// Copyright 2002 Indiana University.
3// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
4//
5// Distributed under the Boost Software License, Version 1.0. (See
6// accompanying file LICENSE_1_0.txt or copy at
7// http://www.boost.org/LICENSE_1_0.txt)
8//=======================================================================
9
10#ifndef BOOST_GRAPH_SELECTORS_HPP
11#define BOOST_GRAPH_SELECTORS_HPP
12
13#include <boost/mpl/bool.hpp>
14
15namespace boost
16{
17
18//===========================================================================
19// Selectors for the Directed template parameter of adjacency_list
20// and adjacency_matrix.
21
22struct directedS
23{
24 enum
25 {
26 is_directed = true,
27 is_bidir = false
28 };
29 typedef mpl::true_ is_directed_t;
30 typedef mpl::false_ is_bidir_t;
31};
32struct undirectedS
33{
34 enum
35 {
36 is_directed = false,
37 is_bidir = false
38 };
39 typedef mpl::false_ is_directed_t;
40 typedef mpl::false_ is_bidir_t;
41};
42struct bidirectionalS
43{
44 enum
45 {
46 is_directed = true,
47 is_bidir = true
48 };
49 typedef mpl::true_ is_directed_t;
50 typedef mpl::true_ is_bidir_t;
51};
52
53} // namespace boost
54
55#endif // BOOST_GRAPH_SELECTORS_HPP
56