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accounting.hpp
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random.hpp
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/usr/include/boost/graph/graph_traits.hpp
(13065B)
//======================================================================= // Copyright 1997, 1998, 1999, 2000 University of Notre Dame. // 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_TRAITS_HPP #define BOOST_GRAPH_TRAITS_HPP #include <boost/config.hpp> #include <iterator> #include <utility> /* Primarily for std::pair */ #include <boost/tuple/tuple.hpp> #include <boost/mpl/if.hpp> #include <boost/mpl/eval_if.hpp> #include <boost/mpl/bool.hpp> #include <boost/mpl/not.hpp> #include <boost/mpl/has_xxx.hpp> #include <boost/mpl/void.hpp> #include <boost/mpl/identity.hpp> #include <boost/type_traits/is_same.hpp> #include <boost/iterator/iterator_categories.hpp> #include <boost/iterator/iterator_adaptor.hpp> #include <boost/pending/property.hpp> #include <boost/detail/workaround.hpp> namespace boost { namespace detail { #define BOOST_GRAPH_MEMBER_OR_VOID(name) \ BOOST_MPL_HAS_XXX_TRAIT_DEF(name) \ template < typename T > struct BOOST_JOIN(get_member_, name) \ { \ typedef typename T::name type; \ }; \ template < typename T > \ struct BOOST_JOIN(get_opt_member_, name) \ : boost::mpl::eval_if_c< BOOST_JOIN(has_, name) < T >::value, BOOST_JOIN(get_member_, name)< T >, boost::mpl::identity< void > >\ { \ }; BOOST_GRAPH_MEMBER_OR_VOID(adjacency_iterator) BOOST_GRAPH_MEMBER_OR_VOID(out_edge_iterator) BOOST_GRAPH_MEMBER_OR_VOID(in_edge_iterator) BOOST_GRAPH_MEMBER_OR_VOID(vertex_iterator) BOOST_GRAPH_MEMBER_OR_VOID(edge_iterator) BOOST_GRAPH_MEMBER_OR_VOID(vertices_size_type) BOOST_GRAPH_MEMBER_OR_VOID(edges_size_type) BOOST_GRAPH_MEMBER_OR_VOID(degree_size_type) } template < typename G > struct graph_traits { #define BOOST_GRAPH_PULL_OPT_MEMBER(name) \ typedef typename detail::BOOST_JOIN(get_opt_member_, name)< G >::type name; typedef typename G::vertex_descriptor vertex_descriptor; typedef typename G::edge_descriptor edge_descriptor; BOOST_GRAPH_PULL_OPT_MEMBER(adjacency_iterator) BOOST_GRAPH_PULL_OPT_MEMBER(out_edge_iterator) BOOST_GRAPH_PULL_OPT_MEMBER(in_edge_iterator) BOOST_GRAPH_PULL_OPT_MEMBER(vertex_iterator) BOOST_GRAPH_PULL_OPT_MEMBER(edge_iterator) typedef typename G::directed_category directed_category; typedef typename G::edge_parallel_category edge_parallel_category; typedef typename G::traversal_category traversal_category; BOOST_GRAPH_PULL_OPT_MEMBER(vertices_size_type) BOOST_GRAPH_PULL_OPT_MEMBER(edges_size_type) BOOST_GRAPH_PULL_OPT_MEMBER(degree_size_type) #undef BOOST_GRAPH_PULL_OPT_MEMBER static inline vertex_descriptor null_vertex(); }; template < typename G > inline typename graph_traits< G >::vertex_descriptor graph_traits< G >::null_vertex() { return G::null_vertex(); } // directed_category tags struct directed_tag { }; struct undirected_tag { }; struct bidirectional_tag : public directed_tag { }; namespace detail { inline bool is_directed(directed_tag) { return true; } inline bool is_directed(undirected_tag) { return false; } } /** Return true if the given graph is directed. */ template < typename Graph > bool is_directed(const Graph&) { typedef typename graph_traits< Graph >::directed_category Cat; return detail::is_directed(Cat()); } /** Return true if the given graph is undirected. */ template < typename Graph > bool is_undirected(const Graph& g) { return !is_directed(g); } /** @name Directed/Undirected Graph Traits */ //@{ namespace graph_detail { template < typename Tag > struct is_directed_tag : mpl::bool_< is_convertible< Tag, directed_tag >::value > { }; } // namespace graph_detail template < typename Graph > struct is_directed_graph : graph_detail::is_directed_tag< typename graph_traits< Graph >::directed_category > { }; template < typename Graph > struct is_undirected_graph : mpl::not_< is_directed_graph< Graph > > { }; //@} // edge_parallel_category tags struct allow_parallel_edge_tag { }; struct disallow_parallel_edge_tag { }; namespace detail { inline bool allows_parallel(allow_parallel_edge_tag) { return true; } inline bool allows_parallel(disallow_parallel_edge_tag) { return false; } } template < typename Graph > bool allows_parallel_edges(const Graph&) { typedef typename graph_traits< Graph >::edge_parallel_category Cat; return detail::allows_parallel(Cat()); } /** @name Parallel Edges Traits */ //@{ /** * The is_multigraph metafunction returns true if the graph allows * parallel edges. Technically, a multigraph is a simple graph that * allows parallel edges, but since there are no traits for the allowance * or disallowance of loops, this is a moot point. */ template < typename Graph > struct is_multigraph : mpl::bool_< is_same< typename graph_traits< Graph >::edge_parallel_category, allow_parallel_edge_tag >::value > { }; //@} // traversal_category tags struct incidence_graph_tag { }; struct adjacency_graph_tag { }; struct bidirectional_graph_tag : virtual incidence_graph_tag { }; struct vertex_list_graph_tag { }; struct edge_list_graph_tag { }; struct adjacency_matrix_tag { }; // Parallel traversal_category tags struct distributed_graph_tag { }; struct distributed_vertex_list_graph_tag { }; struct distributed_edge_list_graph_tag { }; #define BOOST_GRAPH_SEQUENTIAL_TRAITS_DEFINES_DISTRIBUTED_TAGS // Disable these // from external // versions of // PBGL /** @name Traversal Category Traits * These traits classify graph types by their supported methods of * vertex and edge traversal. */ //@{ template < typename Graph > struct is_incidence_graph : mpl::bool_< is_convertible< typename graph_traits< Graph >::traversal_category, incidence_graph_tag >::value > { }; template < typename Graph > struct is_bidirectional_graph : mpl::bool_< is_convertible< typename graph_traits< Graph >::traversal_category, bidirectional_graph_tag >::value > { }; template < typename Graph > struct is_vertex_list_graph : mpl::bool_< is_convertible< typename graph_traits< Graph >::traversal_category, vertex_list_graph_tag >::value > { }; template < typename Graph > struct is_edge_list_graph : mpl::bool_< is_convertible< typename graph_traits< Graph >::traversal_category, edge_list_graph_tag >::value > { }; template < typename Graph > struct is_adjacency_matrix : mpl::bool_< is_convertible< typename graph_traits< Graph >::traversal_category, adjacency_matrix_tag >::value > { }; //@} /** @name Directed Graph Traits * These metafunctions are used to fully classify directed vs. undirected * graphs. Recall that an undirected graph is also bidirectional, but it * cannot be both undirected and directed at the same time. */ //@{ template < typename Graph > struct is_directed_unidirectional_graph : mpl::and_< is_directed_graph< Graph >, mpl::not_< is_bidirectional_graph< Graph > > > { }; template < typename Graph > struct is_directed_bidirectional_graph : mpl::and_< is_directed_graph< Graph >, is_bidirectional_graph< Graph > > { }; //@} //?? not the right place ?? Lee typedef boost::forward_traversal_tag multi_pass_input_iterator_tag; namespace detail { BOOST_MPL_HAS_XXX_TRAIT_DEF(graph_property_type) BOOST_MPL_HAS_XXX_TRAIT_DEF(edge_property_type) BOOST_MPL_HAS_XXX_TRAIT_DEF(vertex_property_type) template < typename G > struct get_graph_property_type { typedef typename G::graph_property_type type; }; template < typename G > struct get_edge_property_type { typedef typename G::edge_property_type type; }; template < typename G > struct get_vertex_property_type { typedef typename G::vertex_property_type type; }; } template < typename G > struct graph_property_type : boost::mpl::eval_if< detail::has_graph_property_type< G >, detail::get_graph_property_type< G >, no_property > { }; template < typename G > struct edge_property_type : boost::mpl::eval_if< detail::has_edge_property_type< G >, detail::get_edge_property_type< G >, no_property > { }; template < typename G > struct vertex_property_type : boost::mpl::eval_if< detail::has_vertex_property_type< G >, detail::get_vertex_property_type< G >, no_property > { }; template < typename G > struct graph_bundle_type { typedef typename G::graph_bundled type; }; template < typename G > struct vertex_bundle_type { typedef typename G::vertex_bundled type; }; template < typename G > struct edge_bundle_type { typedef typename G::edge_bundled type; }; namespace graph { namespace detail { template < typename Graph, typename Descriptor > class bundled_result { typedef typename graph_traits< Graph >::vertex_descriptor Vertex; typedef typename mpl::if_c< (is_same< Descriptor, Vertex >::value), vertex_bundle_type< Graph >, edge_bundle_type< Graph > >::type bundler; public: typedef typename bundler::type type; }; template < typename Graph > class bundled_result< Graph, graph_bundle_t > { typedef typename graph_traits< Graph >::vertex_descriptor Vertex; typedef graph_bundle_type< Graph > bundler; public: typedef typename bundler::type type; }; } } // namespace graph::detail namespace graph_detail { // A helper metafunction for determining whether or not a type is // bundled. template < typename T > struct is_no_bundle : mpl::bool_< is_same< T, no_property >::value > { }; } // namespace graph_detail /** @name Graph Property Traits * These metafunctions (along with those above), can be used to access the * vertex and edge properties (bundled or otherwise) of vertices and * edges. */ //@{ template < typename Graph > struct has_graph_property : mpl::not_< typename detail::is_no_property< typename graph_property_type< Graph >::type >::type >::type { }; template < typename Graph > struct has_bundled_graph_property : mpl::not_< graph_detail::is_no_bundle< typename graph_bundle_type< Graph >::type > > { }; template < typename Graph > struct has_vertex_property : mpl::not_< typename detail::is_no_property< typename vertex_property_type< Graph >::type > >::type { }; template < typename Graph > struct has_bundled_vertex_property : mpl::not_< graph_detail::is_no_bundle< typename vertex_bundle_type< Graph >::type > > { }; template < typename Graph > struct has_edge_property : mpl::not_< typename detail::is_no_property< typename edge_property_type< Graph >::type > >::type { }; template < typename Graph > struct has_bundled_edge_property : mpl::not_< graph_detail::is_no_bundle< typename edge_bundle_type< Graph >::type > > { }; //@} } // namespace boost // Since pair is in namespace std, Koenig lookup will find source and // target if they are also defined in namespace std. This is illegal, // but the alternative is to put source and target in the global // namespace which causes name conflicts with other libraries (like // SUIF). namespace std { /* Some helper functions for dealing with pairs as edges */ template < class T, class G > T source(pair< T, T > p, const G&) { return p.first; } template < class T, class G > T target(pair< T, T > p, const G&) { return p.second; } } #if defined(__GNUC__) && defined(__SGI_STL_PORT) // For some reason g++ with STLport does not see the above definition // of source() and target() unless we bring them into the boost // namespace. namespace boost { using std::source; using std::target; } #endif #endif // BOOST_GRAPH_TRAITS_HPP
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