| //======================================================================= |
| // 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 |