[52] | 1 | // -*-mode: c++; -*- |
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| 2 | |
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[163] | 3 | #include <invalid.h> |
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[145] | 4 | |
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[163] | 5 | /// The namespace of HugoLib |
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| 6 | namespace hugo { |
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| 7 | |
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| 8 | // @defgroup empty_graph The EmptyGraph class |
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| 9 | // @{ |
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| 10 | |
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| 11 | /// An empty graph class. |
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| 12 | |
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| 13 | /// This class provides all the common features of a grapf structure, |
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| 14 | /// however completely without implementations or real data structures |
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| 15 | /// behind the interface. |
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| 16 | /// All graph algorithms should compile with this class, but it will not |
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| 17 | /// run properly, of course. |
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| 18 | /// |
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| 19 | /// It can be used for checking the interface compatibility, |
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| 20 | /// or it can serve as a skeleton of a new graph structure. |
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[165] | 21 | /// |
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| 22 | /// Also, you will find here the full documentation of a certain graph |
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| 23 | /// feature, the documentation of a real graph imlementation |
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| 24 | /// like @ref ListGraph or |
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| 25 | /// @ref SmartGraph will just refer to this structure. |
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[163] | 26 | class EmptyGraph |
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| 27 | { |
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[147] | 28 | public: |
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| 29 | |
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[163] | 30 | /// The base type of the node iterators. |
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| 31 | class Node { |
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| 32 | public: |
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| 33 | /// @warning The default constructor sets the iterator |
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| 34 | /// to an undefined value. |
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| 35 | Node() {} //FIXME |
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| 36 | /// Initialize the iterator to be invalid |
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| 37 | Node(Invalid) {}; |
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| 38 | //Node(const Node &) {} |
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| 39 | bool operator==(Node n) const { return true; } //FIXME |
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| 40 | bool operator!=(Node n) const { return true; } //FIXME |
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| 41 | }; |
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[147] | 42 | |
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[163] | 43 | /// This iterator goes through each node. |
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| 44 | class NodeIt : public Node { |
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| 45 | public: |
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| 46 | /// @warning The default constructor sets the iterator |
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| 47 | /// to an undefined value. |
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| 48 | NodeIt() {} //FIXME |
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| 49 | /// Initialize the iterator to be invalid |
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| 50 | NodeIt(Invalid) {}; |
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| 51 | /// Sets the iterator to the first node of \c G. |
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| 52 | NodeIt(const EmptyGraph &G) {} |
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| 53 | NodeIt(const NodeIt &) {} //FIXME |
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| 54 | }; |
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| 55 | |
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| 56 | |
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| 57 | /// The base type of the edge iterators. |
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| 58 | class Edge { |
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| 59 | public: |
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| 60 | /// @warning The default constructor sets the iterator |
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| 61 | /// to an undefined value. |
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| 62 | Edge() {} //FIXME |
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| 63 | /// Initialize the iterator to be invalid |
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| 64 | Edge(Invalid) {}; |
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| 65 | //Edge(const Edge &) {} |
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| 66 | bool operator==(Edge n) const { return true; } //FIXME |
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| 67 | bool operator!=(Edge n) const { return true; } //FIXME |
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| 68 | }; |
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| 69 | |
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| 70 | /// This iterator goes trought the outgoing edges of a certain graph. |
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| 71 | |
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| 72 | class OutEdgeIt : public Edge { |
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| 73 | public: |
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| 74 | /// @warning The default constructor sets the iterator |
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| 75 | /// to an undefined value. |
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| 76 | OutEdgeIt() {} |
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| 77 | /// Initialize the iterator to be invalid |
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| 78 | OutEdgeIt(Invalid) {}; |
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| 79 | /// This constructor sets the iterator to first outgoing edge. |
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| 80 | |
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| 81 | /// This constructor set the iterator to the first outgoing edge of |
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| 82 | /// node |
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| 83 | ///@param n the node |
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| 84 | ///@param G the graph |
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| 85 | OutEdgeIt(const EmptyGraph & G, Node n) {} |
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| 86 | }; |
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| 87 | |
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| 88 | class InEdgeIt : public Edge { |
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| 89 | public: |
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| 90 | /// @warning The default constructor sets the iterator |
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| 91 | /// to an undefined value. |
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| 92 | InEdgeIt() {} |
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| 93 | /// Initialize the iterator to be invalid |
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| 94 | InEdgeIt(Invalid) {}; |
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| 95 | InEdgeIt(const EmptyGraph &, Node) {} |
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| 96 | }; |
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| 97 | // class SymEdgeIt : public Edge {}; |
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| 98 | class EdgeIt : public Edge { |
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| 99 | public: |
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| 100 | /// @warning The default constructor sets the iterator |
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| 101 | /// to an undefined value. |
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| 102 | EdgeIt() {} |
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| 103 | /// Initialize the iterator to be invalid |
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| 104 | EdgeIt(Invalid) {}; |
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| 105 | EdgeIt(const EmptyGraph &) {} |
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| 106 | }; |
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| 107 | |
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| 108 | /// First node of the graph. |
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| 109 | |
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| 110 | /// \post \c i and the return value will be the first node. |
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| 111 | /// |
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| 112 | NodeIt &first(NodeIt &i) const { return i;} |
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| 113 | |
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| 114 | /// The first outgoing edge. |
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| 115 | InEdgeIt &first(InEdgeIt &i, Node n) const { return i;} |
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| 116 | /// The first incoming edge. |
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| 117 | OutEdgeIt &first(OutEdgeIt &i, Node n) const { return i;} |
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| 118 | // SymEdgeIt &first(SymEdgeIt &, Node) const { return i;} |
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| 119 | /// The first edge of the Graph. |
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| 120 | EdgeIt &first(EdgeIt &i) const { return i;} |
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| 121 | |
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| 122 | // Node getNext(Node) const {} |
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| 123 | // InEdgeIt getNext(InEdgeIt) const {} |
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| 124 | // OutEdgeIt getNext(OutEdgeIt) const {} |
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| 125 | // //SymEdgeIt getNext(SymEdgeIt) const {} |
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| 126 | // EdgeIt getNext(EdgeIt) const {} |
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| 127 | |
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| 128 | /// Go to the next node. |
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| 129 | Node &next(Node &i) const { return i;} |
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| 130 | /// Go to the next incoming edge. |
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| 131 | InEdgeIt &next(InEdgeIt &i) const { return i;} |
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| 132 | /// Go to the next outgoing edge. |
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| 133 | OutEdgeIt &next(OutEdgeIt &i) const { return i;} |
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| 134 | //SymEdgeIt &next(SymEdgeIt &) const {} |
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| 135 | /// Go to the next edge. |
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| 136 | EdgeIt &next(EdgeIt &i) const { return i;} |
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| 137 | |
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| 138 | ///Gives back the head node of an edge. |
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| 139 | Node head(Edge) const { return INVALID; } |
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| 140 | ///Gives back the tail node of an edge. |
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| 141 | Node tail(Edge) const { return INVALID; } |
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[52] | 142 | |
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[163] | 143 | // Node aNode(InEdgeIt) const {} |
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| 144 | // Node aNode(OutEdgeIt) const {} |
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| 145 | // Node aNode(SymEdgeIt) const {} |
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| 146 | |
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| 147 | // Node bNode(InEdgeIt) const {} |
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| 148 | // Node bNode(OutEdgeIt) const {} |
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| 149 | // Node bNode(SymEdgeIt) const {} |
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| 150 | |
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| 151 | /// Checks if a node iterator is valid |
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| 152 | bool valid(const Node) const { return true;}; |
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| 153 | /// Checks if an edge iterator is valid |
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| 154 | bool valid(const Edge) const { return true;}; |
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| 155 | |
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| 156 | ///Gives back the \e id of a node. |
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| 157 | int id(const Node) const { return 0;}; |
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| 158 | ///Gives back the \e id of an edge. |
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| 159 | int id(const Edge) const { return 0;}; |
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| 160 | |
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| 161 | //void setInvalid(Node &) const {}; |
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| 162 | //void setInvalid(Edge &) const {}; |
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| 163 | |
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| 164 | Node addNode() { return INVALID;} |
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| 165 | Edge addEdge(Node tail, Node head) { return INVALID;} |
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| 166 | |
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| 167 | void erase(Node n) {} |
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| 168 | void erase(Edge e) {} |
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| 169 | |
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| 170 | void clear() {} |
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| 171 | |
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| 172 | int nodeNum() { return 0;} |
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| 173 | int edgeNum() { return 0;} |
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| 174 | |
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| 175 | EmptyGraph() {}; |
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| 176 | EmptyGraph(const EmptyGraph &G) {}; |
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| 177 | |
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| 178 | |
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| 179 | |
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| 180 | ///Read/write map from the nodes to type \c T. |
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| 181 | template<class T> class NodeMap |
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| 182 | { |
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| 183 | public: |
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| 184 | typedef T ValueType; |
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| 185 | typedef Node KeyType; |
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| 186 | |
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| 187 | NodeMap(const EmptyGraph &G) {} |
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| 188 | NodeMap(const EmptyGraph &G, T t) {} |
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| 189 | |
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| 190 | void set(Node i, T t) {} |
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| 191 | T get(Node i) const {return *(T*)NULL;} //FIXME: Is it necessary |
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| 192 | T &operator[](Node i) {return *(T*)NULL;} |
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| 193 | const T &operator[](Node i) const {return *(T*)NULL;} |
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| 194 | |
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| 195 | void update() {} |
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| 196 | void update(T a) {} //FIXME: Is it necessary |
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| 197 | }; |
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| 198 | |
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| 199 | ///Read/write map from the edges to type \c T. |
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| 200 | template<class T> class EdgeMap |
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| 201 | { |
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| 202 | public: |
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| 203 | typedef T ValueType; |
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| 204 | typedef Edge KeyType; |
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| 205 | |
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| 206 | EdgeMap(const EmptyGraph &G) {} |
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| 207 | EdgeMap(const EmptyGraph &G, T t) {} |
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| 208 | |
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| 209 | void set(Edge i, T t) {} |
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| 210 | T get(Edge i) const {return *(T*)NULL;} |
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| 211 | T &operator[](Edge i) {return *(T*)NULL;} |
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| 212 | |
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| 213 | void update() {} |
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| 214 | void update(T a) {} //FIXME: Is it necessary |
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| 215 | }; |
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[147] | 216 | }; |
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[52] | 217 | |
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[163] | 218 | // @} |
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[147] | 219 | |
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[163] | 220 | }; |
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[52] | 221 | |
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[145] | 222 | |
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| 223 | |
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[147] | 224 | // class EmptyBipGraph : public EmptyGraph |
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| 225 | // { |
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[163] | 226 | // class ANode {}; |
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| 227 | // class BNode {}; |
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[145] | 228 | |
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[163] | 229 | // ANode &next(ANode &) {} |
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| 230 | // BNode &next(BNode &) {} |
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[145] | 231 | |
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[163] | 232 | // ANode &getFirst(ANode &) const {} |
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| 233 | // BNode &getFirst(BNode &) const {} |
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[145] | 234 | |
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[147] | 235 | // enum NodeClass { A = 0, B = 1 }; |
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[163] | 236 | // NodeClass getClass(Node n) {} |
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[147] | 237 | |
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| 238 | // } |
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