| //======================================================================= | |
| // Copyright 2002 Indiana University. | |
| // Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek | |
| // | |
| // 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) | |
| //======================================================================= | |
| #ifndef BOOST_GRAPH_SELECTORS_HPP | |
| #define BOOST_GRAPH_SELECTORS_HPP | |
| #include <boost/mpl/bool.hpp> | |
| namespace boost { | |
| //=========================================================================== | |
| // Selectors for the Directed template parameter of adjacency_list | |
| // and adjacency_matrix. | |
| struct directedS { enum { is_directed = true, is_bidir = false }; | |
| typedef mpl::true_ is_directed_t; | |
| typedef mpl::false_ is_bidir_t; | |
| }; | |
| struct undirectedS { | |
| enum { is_directed = false, is_bidir = false }; | |
| typedef mpl::false_ is_directed_t; | |
| typedef mpl::false_ is_bidir_t; | |
| }; | |
| struct bidirectionalS { | |
| enum { is_directed = true, is_bidir = true }; | |
| typedef mpl::true_ is_directed_t; | |
| typedef mpl::true_ is_bidir_t; | |
| }; | |
| } // namespace boost | |
| #endif // BOOST_GRAPH_SELECTORS_HPP |