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