src/hugo/map_bits.h
changeset 846 a7a406fdb006
child 901 69a8e672acb1
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-1:000000000000 0:fd13af628ae2
       
     1 // -*- c++ -*- 
       
     2 #ifndef MAP_BITS_H
       
     3 #define MAP_BITS_H
       
     4 
       
     5 ///\ingroup graphmaps
       
     6 ///\file
       
     7 ///\brief Some utils to help implement maps.
       
     8 
       
     9 namespace hugo {
       
    10 
       
    11 
       
    12   /// \addtogroup graphmaps
       
    13   /// @{
       
    14 
       
    15   /// Helper class to get information about the key type.
       
    16   template <typename Graph, typename KeyIt>
       
    17   struct KeyInfo {};
       
    18 
       
    19   template <typename Graph>
       
    20   struct KeyInfo<Graph, typename Graph::NodeIt> {
       
    21     static int maxId(const Graph& graph) {
       
    22       return graph.maxNodeId();
       
    23     }
       
    24     static int id(const Graph& graph, const typename Graph::Node& node) {
       
    25       return graph.id(node);
       
    26     }
       
    27   };
       
    28 
       
    29   template <typename Graph>
       
    30   struct KeyInfo<Graph, typename Graph::EdgeIt> {
       
    31     static int maxId(const Graph& graph) {
       
    32       return graph.maxEdgeId();
       
    33     }
       
    34     static int id(const Graph& graph, const typename Graph::Edge& edge) {
       
    35       return graph.id(edge);
       
    36     }
       
    37   };
       
    38 
       
    39   template <typename Graph>
       
    40   struct KeyInfo<Graph, typename Graph::SymEdgeIt> {
       
    41     static int maxId(const Graph& graph) {
       
    42       return graph.maxEdgeId() >> 1;
       
    43     }
       
    44     static int id(const Graph& graph, const typename Graph::Edge& edge) {
       
    45       return graph.id(edge) >> 1;
       
    46     }
       
    47   };
       
    48 
       
    49   /// @}
       
    50 }
       
    51 
       
    52 #endif