williamr@2: //======================================================================= williamr@2: // Copyright 2002 Indiana University. williamr@2: // Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek williamr@2: // williamr@2: // Distributed under the Boost Software License, Version 1.0. (See williamr@2: // accompanying file LICENSE_1_0.txt or copy at williamr@2: // http://www.boost.org/LICENSE_1_0.txt) williamr@2: //======================================================================= williamr@2: williamr@2: #ifndef BOOST_GRAPH_SELECTORS_HPP williamr@2: #define BOOST_GRAPH_SELECTORS_HPP williamr@2: williamr@2: namespace boost { williamr@2: williamr@2: //=========================================================================== williamr@2: // Selectors for the Directed template parameter of adjacency_list williamr@2: // and adjacency_matrix. williamr@2: williamr@2: struct directedS { enum { is_directed = true, is_bidir = false }; williamr@2: typedef true_type is_directed_t; williamr@2: typedef false_type is_bidir_t; williamr@2: }; williamr@2: struct undirectedS { williamr@2: enum { is_directed = false, is_bidir = false }; williamr@2: typedef false_type is_directed_t; williamr@2: typedef false_type is_bidir_t; williamr@2: }; williamr@2: struct bidirectionalS { williamr@2: enum { is_directed = true, is_bidir = true }; williamr@2: typedef true_type is_directed_t; williamr@2: typedef true_type is_bidir_t; williamr@2: }; williamr@2: williamr@2: } // namespace boost williamr@2: williamr@2: #endif // BOOST_GRAPH_SELECTORS_HPP