[59] | 1 | #ifndef LIST_GRAPH_HH |
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| 2 | #define LIST_GRAPH_HH |
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[46] | 3 | |
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| 4 | #include <iostream> |
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| 5 | |
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| 6 | namespace marci { |
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| 7 | |
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| 8 | template <typename It> |
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| 9 | int count(It it) { |
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| 10 | int i=0; |
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| 11 | for( ; it.valid(); ++it) { ++i; } |
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| 12 | return i; |
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| 13 | } |
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| 14 | |
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| 15 | class ListGraph { |
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[59] | 16 | |
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[46] | 17 | class node_item; |
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| 18 | class edge_item; |
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[59] | 19 | |
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[46] | 20 | public: |
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[59] | 21 | |
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[46] | 22 | class NodeIt; |
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| 23 | class EachNodeIt; |
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| 24 | class EdgeIt; |
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| 25 | class EachEdgeIt; |
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| 26 | class OutEdgeIt; |
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| 27 | class InEdgeIt; |
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| 28 | class SymEdgeIt; |
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[69] | 29 | template <typename T> class NodeMap; |
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| 30 | template <typename T> class EdgeMap; |
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[59] | 31 | |
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| 32 | private: |
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| 33 | |
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[69] | 34 | template <typename T> friend class NodeMap; |
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| 35 | template <typename T> friend class EdgeMap; |
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[46] | 36 | |
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[69] | 37 | template <typename T> |
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[46] | 38 | class NodeMap { |
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| 39 | const ListGraph& G; |
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[69] | 40 | std::vector<T> container; |
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[46] | 41 | public: |
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[69] | 42 | typedef T ValueType; |
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| 43 | typedef NodeIt KeyType; |
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| 44 | NodeMap(const ListGraph& _G) : G(_G), container(G.node_id) { } |
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| 45 | NodeMap(const ListGraph& _G, T a) : |
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| 46 | G(_G), container(G.node_id, a) { } |
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[75] | 47 | void set(NodeIt n, T a) { container[/*G.id(n)*/n.node->id]=a; } |
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| 48 | T get(NodeIt n) const { return container[/*G.id(n)*/n.node->id]; } |
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| 49 | T& operator[](NodeIt n) { return container[/*G.id(n)*/n.node->id]; } |
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| 50 | const T& operator[](NodeIt n) const { return container[/*G.id(n)*/n.node->id]; } |
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[69] | 51 | void resize() { container.resize(G.node_id); } |
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| 52 | void resize(T a) { container.resize(G.node_id, a); } |
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[46] | 53 | }; |
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| 54 | |
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[69] | 55 | template <typename T> |
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[46] | 56 | class EdgeMap { |
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| 57 | const ListGraph& G; |
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[69] | 58 | std::vector<T> container; |
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[46] | 59 | public: |
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[69] | 60 | typedef T ValueType; |
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| 61 | typedef EdgeIt KeyType; |
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| 62 | EdgeMap(const ListGraph& _G) : G(_G), container(G.edge_id) { } |
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| 63 | EdgeMap(const ListGraph& _G, T a) : |
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| 64 | G(_G), container(G.edge_id, a) { } |
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[75] | 65 | void set(EdgeIt e, T a) { container[/*G.id(e)*/e.edge->id]=a; } |
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| 66 | T get(EdgeIt e) const { return container[/*G.id(e)*/e.edge->id]; } |
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| 67 | T& operator[](EdgeIt e) { return container[/*G.id(e)*/e.edge->id]; } |
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| 68 | const T& operator[](EdgeIt e) const { return container[/*G.id(e)*/e.edge->id]; } |
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[69] | 69 | void resize() { container.resize(G.edge_id); } |
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| 70 | void resize(T a) { container.resize(G.edge_id, a); } |
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[46] | 71 | }; |
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| 72 | |
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| 73 | int node_id; |
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| 74 | int edge_id; |
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| 75 | int _node_num; |
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| 76 | int _edge_num; |
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| 77 | |
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| 78 | node_item* _first_node; |
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| 79 | node_item* _last_node; |
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| 80 | |
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| 81 | class node_item { |
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| 82 | friend class ListGraph; |
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[75] | 83 | template <typename T> friend class NodeMap; |
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| 84 | |
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[46] | 85 | friend class NodeIt; |
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| 86 | friend class EachNodeIt; |
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| 87 | friend class EdgeIt; |
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| 88 | friend class EachEdgeIt; |
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| 89 | friend class OutEdgeIt; |
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| 90 | friend class InEdgeIt; |
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| 91 | friend class SymEdgeIt; |
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| 92 | friend std::ostream& operator<<(std::ostream& os, const NodeIt& i); |
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| 93 | friend std::ostream& operator<<(std::ostream& os, const EdgeIt& i); |
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[59] | 94 | //ListGraph* G; |
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[46] | 95 | int id; |
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| 96 | edge_item* _first_out_edge; |
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| 97 | edge_item* _last_out_edge; |
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| 98 | edge_item* _first_in_edge; |
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| 99 | edge_item* _last_in_edge; |
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| 100 | node_item* _next_node; |
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| 101 | node_item* _prev_node; |
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| 102 | public: |
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| 103 | node_item() { } |
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| 104 | }; |
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| 105 | |
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| 106 | class edge_item { |
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| 107 | friend class ListGraph; |
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[75] | 108 | template <typename T> friend class EdgeMap; |
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| 109 | |
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[46] | 110 | friend class NodeIt; |
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| 111 | friend class EachNodeIt; |
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| 112 | friend class EdgeIt; |
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| 113 | friend class EachEdgeIt; |
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| 114 | friend class OutEdgeIt; |
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| 115 | friend class InEdgeIt; |
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| 116 | friend class SymEdgeIt; |
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| 117 | friend std::ostream& operator<<(std::ostream& os, const EdgeIt& i); |
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[59] | 118 | //ListGraph* G; |
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[46] | 119 | int id; |
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| 120 | node_item* _tail; |
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| 121 | node_item* _head; |
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| 122 | edge_item* _next_out; |
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| 123 | edge_item* _prev_out; |
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| 124 | edge_item* _next_in; |
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| 125 | edge_item* _prev_in; |
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| 126 | public: |
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| 127 | edge_item() { } |
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| 128 | }; |
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| 129 | |
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| 130 | node_item* _add_node() { |
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| 131 | node_item* p=new node_item; |
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| 132 | p->id=node_id++; |
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| 133 | p->_first_out_edge=0; |
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| 134 | p->_last_out_edge=0; |
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| 135 | p->_first_in_edge=0; |
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| 136 | p->_last_in_edge=0; |
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| 137 | p->_prev_node=_last_node; |
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| 138 | p->_next_node=0; |
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| 139 | if (_last_node) _last_node->_next_node=p; |
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| 140 | _last_node=p; |
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| 141 | if (!_first_node) _first_node=p; |
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| 142 | |
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| 143 | ++_node_num; |
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| 144 | return p; |
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| 145 | } |
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| 146 | |
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| 147 | edge_item* _add_edge(node_item* _tail, node_item* _head) { |
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| 148 | edge_item* e=new edge_item; |
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| 149 | e->id=edge_id++; |
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| 150 | e->_tail=_tail; |
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| 151 | e->_head=_head; |
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| 152 | |
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| 153 | e->_prev_out=_tail->_last_out_edge; |
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| 154 | if (_tail->_last_out_edge) (_tail->_last_out_edge)->_next_out=e; |
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| 155 | _tail->_last_out_edge=e; |
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| 156 | if (!_tail->_first_out_edge) _tail->_first_out_edge=e; |
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| 157 | e->_next_out=0; |
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| 158 | |
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| 159 | e->_prev_in=_head->_last_in_edge; |
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| 160 | if (_head->_last_in_edge) (_head->_last_in_edge)->_next_in=e; |
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| 161 | _head->_last_in_edge=e; |
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| 162 | if (!_head->_first_in_edge) { _head->_first_in_edge=e; } |
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| 163 | e->_next_in=0; |
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| 164 | |
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| 165 | ++_edge_num; |
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| 166 | return e; |
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| 167 | } |
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| 168 | |
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| 169 | //deletes a node which has no out edge and no in edge |
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| 170 | void _delete_node(node_item* v) { |
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| 171 | if (v->_next_node) (v->_next_node)->_prev_node=v->_prev_node; else |
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| 172 | _last_node=v->_prev_node; |
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| 173 | if (v->_prev_node) (v->_prev_node)->_next_node=v->_next_node; else |
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| 174 | _first_node=v->_next_node; |
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| 175 | |
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| 176 | delete v; |
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| 177 | --_node_num; |
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| 178 | } |
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| 179 | |
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| 180 | void _delete_edge(edge_item* e) { |
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| 181 | if (e->_next_out) (e->_next_out)->_prev_out=e->_prev_out; else |
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| 182 | (e->_tail)->_last_out_edge=e->_prev_out; |
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| 183 | if (e->_prev_out) (e->_prev_out)->_next_out=e->_next_out; else |
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| 184 | (e->_tail)->_first_out_edge=e->_next_out; |
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| 185 | if (e->_next_in) (e->_next_in)->_prev_in=e->_prev_in; else |
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| 186 | (e->_head)->_last_in_edge=e->_prev_in; |
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| 187 | if (e->_prev_in) (e->_prev_in)->_next_in=e->_next_in; else |
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| 188 | (e->_head)->_first_in_edge=e->_next_in; |
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| 189 | |
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| 190 | delete e; |
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| 191 | --_edge_num; |
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| 192 | } |
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| 193 | |
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| 194 | void _set_tail(edge_item* e, node_item* _tail) { |
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| 195 | if (e->_next_out) (e->_next_out)->_prev_out=e->_prev_out; else |
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| 196 | (e->_tail)->_last_out_edge=e->_prev_out; |
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| 197 | if (e->_prev_out) (e->_prev_out)->_next_out=e->_next_out; else |
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| 198 | (e->_tail)->_first_out_edge=e->_next_out; |
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| 199 | |
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| 200 | e->_tail=_tail; |
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| 201 | |
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| 202 | e->_prev_out=_tail->_last_out_edge; |
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| 203 | if (_tail->_last_out_edge) (_tail->_last_out_edge)->_next_out=e; |
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| 204 | _tail->_last_out_edge=e; |
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| 205 | if (!_tail->_first_out_edge) _tail->_first_out_edge=e; |
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| 206 | e->_next_out=0; |
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| 207 | } |
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| 208 | |
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| 209 | void _set_head(edge_item* e, node_item* _head) { |
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| 210 | if (e->_next_in) (e->_next_in)->_prev_in=e->_prev_in; else |
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| 211 | (e->_head)->_last_in_edge=e->_prev_in; |
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| 212 | if (e->_prev_in) (e->_prev_in)->_next_in=e->_next_in; else |
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| 213 | (e->_head)->_first_in_edge=e->_next_in; |
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| 214 | |
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| 215 | e->_head=_head; |
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| 216 | |
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| 217 | e->_prev_in=_head->_last_in_edge; |
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| 218 | if (_head->_last_in_edge) (_head->_last_in_edge)->_next_in=e; |
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| 219 | _head->_last_in_edge=e; |
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| 220 | if (!_head->_first_in_edge) { _head->_first_in_edge=e; } |
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| 221 | e->_next_in=0; |
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| 222 | } |
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| 223 | |
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| 224 | public: |
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| 225 | |
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| 226 | /* default constructor */ |
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| 227 | |
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| 228 | ListGraph() : node_id(0), edge_id(0), _node_num(0), _edge_num(0), _first_node(0), _last_node(0) { } |
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| 229 | |
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| 230 | ~ListGraph() { |
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[67] | 231 | while (first<EachNodeIt>().valid()) erase(first<EachNodeIt>()); |
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[46] | 232 | } |
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| 233 | |
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| 234 | int nodeNum() const { return _node_num; } |
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| 235 | int edgeNum() const { return _edge_num; } |
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| 236 | |
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| 237 | /* functions to construct iterators from the graph, or from each other */ |
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| 238 | |
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[59] | 239 | //EachNodeIt firstNode() const { return EachNodeIt(*this); } |
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| 240 | //EachEdgeIt firstEdge() const { return EachEdgeIt(*this); } |
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[46] | 241 | |
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| 242 | //OutEdgeIt firstOutEdge(const NodeIt v) const { return OutEdgeIt(v); } |
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[59] | 243 | //InEdgeIt firstInEdge(const NodeIt v) const { return InEdgeIt(v); } |
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| 244 | //SymEdgeIt firstSymEdge(const NodeIt v) const { return SymEdgeIt(v); } |
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[64] | 245 | NodeIt tail(EdgeIt e) const { return e.tailNode(); } |
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| 246 | NodeIt head(EdgeIt e) const { return e.headNode(); } |
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[46] | 247 | |
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| 248 | NodeIt aNode(const OutEdgeIt& e) const { return e.aNode(); } |
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| 249 | NodeIt aNode(const InEdgeIt& e) const { return e.aNode(); } |
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| 250 | NodeIt aNode(const SymEdgeIt& e) const { return e.aNode(); } |
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| 251 | |
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| 252 | NodeIt bNode(const OutEdgeIt& e) const { return e.bNode(); } |
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| 253 | NodeIt bNode(const InEdgeIt& e) const { return e.bNode(); } |
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| 254 | NodeIt bNode(const SymEdgeIt& e) const { return e.bNode(); } |
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| 255 | |
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| 256 | //NodeIt invalid_node() { return NodeIt(); } |
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| 257 | //EdgeIt invalid_edge() { return EdgeIt(); } |
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| 258 | //OutEdgeIt invalid_out_edge() { return OutEdgeIt(); } |
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| 259 | //InEdgeIt invalid_in_edge() { return InEdgeIt(); } |
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| 260 | //SymEdgeIt invalid_sym_edge() { return SymEdgeIt(); } |
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| 261 | |
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| 262 | /* same methods in other style */ |
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| 263 | /* for experimental purpose */ |
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| 264 | |
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[75] | 265 | EachNodeIt& getFirst(EachNodeIt& v) const { |
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| 266 | v=EachNodeIt(*this); return v; } |
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| 267 | EachEdgeIt& getFirst(EachEdgeIt& e) const { |
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| 268 | e=EachEdgeIt(*this); return e; } |
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| 269 | OutEdgeIt& getFirst(OutEdgeIt& e, NodeIt v) const { |
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| 270 | e=OutEdgeIt(v); return e; } |
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| 271 | InEdgeIt& getFirst(InEdgeIt& e, NodeIt v) const { |
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| 272 | e=InEdgeIt(v); return e; } |
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| 273 | SymEdgeIt& getFirst(SymEdgeIt& e, NodeIt v) const { |
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| 274 | e=SymEdgeIt(v); return e; } |
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[64] | 275 | //void getTail(NodeIt& n, const EdgeIt& e) const { n=tail(e); } |
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| 276 | //void getHead(NodeIt& n, const EdgeIt& e) const { n=head(e); } |
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[46] | 277 | |
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[64] | 278 | //void getANode(NodeIt& n, const OutEdgeIt& e) const { n=e.aNode(); } |
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| 279 | //void getANode(NodeIt& n, const InEdgeIt& e) const { n=e.aNode(); } |
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| 280 | //void getANode(NodeIt& n, const SymEdgeIt& e) const { n=e.aNode(); } |
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| 281 | //void getBNode(NodeIt& n, const OutEdgeIt& e) const { n=e.bNode(); } |
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| 282 | //void getBNode(NodeIt& n, const InEdgeIt& e) const { n=e.bNode(); } |
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| 283 | //void getBNode(NodeIt& n, const SymEdgeIt& e) const { n=e.bNode(); } |
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[46] | 284 | //void get_invalid(NodeIt& n) { n=NodeIt(); } |
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| 285 | //void get_invalid(EdgeIt& e) { e=EdgeIt(); } |
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| 286 | //void get_invalid(OutEdgeIt& e) { e=OutEdgeIt(); } |
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| 287 | //void get_invalid(InEdgeIt& e) { e=InEdgeIt(); } |
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| 288 | //void get_invalid(SymEdgeIt& e) { e=SymEdgeIt(); } |
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| 289 | |
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| 290 | template< typename It > |
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| 291 | It first() const { |
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| 292 | It e; |
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| 293 | getFirst(e); |
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| 294 | return e; |
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| 295 | } |
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| 296 | |
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| 297 | template< typename It > |
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[64] | 298 | It first(NodeIt v) const { |
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[46] | 299 | It e; |
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| 300 | getFirst(e, v); |
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| 301 | return e; |
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| 302 | } |
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| 303 | |
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| 304 | /* for getting id's of graph objects */ |
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| 305 | /* these are important for the implementation of property vectors */ |
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| 306 | |
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[64] | 307 | int id(NodeIt v) const { return v.node->id; } |
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| 308 | int id(EdgeIt e) const { return e.edge->id; } |
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[46] | 309 | |
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| 310 | /* adding nodes and edges */ |
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| 311 | |
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| 312 | NodeIt addNode() { return NodeIt(_add_node()); } |
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[64] | 313 | EdgeIt addEdge(NodeIt u, NodeIt v) { |
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[46] | 314 | return EdgeIt(_add_edge(u.node, v.node)); |
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| 315 | } |
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| 316 | |
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[67] | 317 | void erase(NodeIt i) { |
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| 318 | while (first<OutEdgeIt>(i).valid()) erase(first<OutEdgeIt>(i)); |
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| 319 | while (first<InEdgeIt>(i).valid()) erase(first<InEdgeIt>(i)); |
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[46] | 320 | _delete_node(i.node); |
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| 321 | } |
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| 322 | |
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[67] | 323 | void erase(EdgeIt e) { _delete_edge(e.edge); } |
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[46] | 324 | |
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[69] | 325 | void clear() { |
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| 326 | while (first<EachNodeIt>().valid()) erase(first<EachNodeIt>()); |
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| 327 | } |
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| 328 | |
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[64] | 329 | void setTail(EdgeIt e, NodeIt tail) { |
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[46] | 330 | _set_tail(e.edge, tail.node); |
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| 331 | } |
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| 332 | |
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[64] | 333 | void setHead(EdgeIt e, NodeIt head) { |
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[46] | 334 | _set_head(e.edge, head.node); |
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| 335 | } |
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| 336 | |
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| 337 | /* stream operations, for testing purpose */ |
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| 338 | |
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| 339 | friend std::ostream& operator<<(std::ostream& os, const NodeIt& i) { |
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| 340 | os << i.node->id; return os; |
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| 341 | } |
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| 342 | friend std::ostream& operator<<(std::ostream& os, const EdgeIt& i) { |
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| 343 | os << "(" << i.edge->_tail->id << "--" << i.edge->id << "->" << i.edge->_head->id << ")"; |
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| 344 | return os; |
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| 345 | } |
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| 346 | |
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| 347 | class NodeIt { |
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| 348 | friend class ListGraph; |
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[75] | 349 | template <typename T> friend class NodeMap; |
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[46] | 350 | |
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| 351 | friend class EdgeIt; |
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| 352 | friend class OutEdgeIt; |
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| 353 | friend class InEdgeIt; |
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| 354 | friend class SymEdgeIt; |
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| 355 | protected: |
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| 356 | node_item* node; |
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[64] | 357 | friend int ListGraph::id(NodeIt v) const; |
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[46] | 358 | public: |
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| 359 | NodeIt() : node(0) { } |
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| 360 | NodeIt(node_item* _node) : node(_node) { } |
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| 361 | bool valid() const { return (node!=0); } |
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| 362 | //void makeInvalid() { node=0; } |
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| 363 | friend bool operator==(const NodeIt& u, const NodeIt& v) { |
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| 364 | return v.node==u.node; |
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| 365 | } |
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| 366 | friend bool operator!=(const NodeIt& u, const NodeIt& v) { |
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| 367 | return v.node!=u.node; |
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| 368 | } |
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| 369 | friend std::ostream& operator<<(std::ostream& os, const NodeIt& i); |
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| 370 | }; |
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| 371 | |
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| 372 | class EachNodeIt : public NodeIt { |
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| 373 | friend class ListGraph; |
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[59] | 374 | protected: |
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| 375 | EachNodeIt(const ListGraph& G) : NodeIt(G._first_node) { } |
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[46] | 376 | public: |
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| 377 | EachNodeIt() : NodeIt() { } |
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| 378 | EachNodeIt(node_item* v) : NodeIt(v) { } |
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| 379 | EachNodeIt& operator++() { node=node->_next_node; return *this; } |
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| 380 | }; |
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| 381 | |
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| 382 | class EdgeIt { |
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| 383 | friend class ListGraph; |
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[75] | 384 | template <typename T> friend class EdgeMap; |
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[46] | 385 | |
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| 386 | friend class NodeIt; |
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| 387 | friend class EachNodeIt; |
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| 388 | protected: |
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| 389 | edge_item* edge; |
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[64] | 390 | friend int ListGraph::id(EdgeIt e) const; |
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[46] | 391 | public: |
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| 392 | EdgeIt() : edge(0) { } |
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| 393 | //EdgeIt() { } |
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| 394 | EdgeIt(edge_item* _edge) : edge(_edge) { } |
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| 395 | bool valid() const { return (edge!=0); } |
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| 396 | //void makeInvalid() { edge=0; } |
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| 397 | friend bool operator==(const EdgeIt& u, const EdgeIt& v) { |
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| 398 | return v.edge==u.edge; |
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| 399 | } |
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| 400 | friend bool operator!=(const EdgeIt& u, const EdgeIt& v) { |
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| 401 | return v.edge!=u.edge; |
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| 402 | } |
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| 403 | protected: |
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| 404 | NodeIt tailNode() const { return NodeIt(edge->_tail); } |
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| 405 | NodeIt headNode() const { return NodeIt(edge->_head); } |
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| 406 | public: |
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| 407 | friend std::ostream& operator<<(std::ostream& os, const EdgeIt& i); |
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| 408 | }; |
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| 409 | |
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| 410 | class EachEdgeIt : public EdgeIt { |
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| 411 | friend class ListGraph; |
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[59] | 412 | protected: |
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[46] | 413 | EachEdgeIt(const ListGraph& G) { |
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[59] | 414 | node_item* v=G._first_node; |
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| 415 | if (v) edge=v->_first_out_edge; else edge=0; |
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[46] | 416 | while (v && !edge) { v=v->_next_node; if (v) edge=v->_first_out_edge; } |
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| 417 | } |
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[59] | 418 | public: |
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| 419 | EachEdgeIt() : EdgeIt() { } |
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| 420 | EachEdgeIt(edge_item* _e) : EdgeIt(_e) { } |
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[46] | 421 | EachEdgeIt& operator++() { |
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[59] | 422 | node_item* v=edge->_tail; |
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[46] | 423 | edge=edge->_next_out; |
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| 424 | while (v && !edge) { v=v->_next_node; if (v) edge=v->_first_out_edge; } |
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| 425 | return *this; |
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| 426 | } |
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| 427 | }; |
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| 428 | |
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| 429 | class OutEdgeIt : public EdgeIt { |
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| 430 | friend class ListGraph; |
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[75] | 431 | //node_item* v; |
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[46] | 432 | protected: |
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[75] | 433 | OutEdgeIt(const NodeIt& _v) /*: v(_v.node)*/ { edge=_v.node->_first_out_edge; } |
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[46] | 434 | public: |
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[75] | 435 | OutEdgeIt() : EdgeIt()/*, v(0)*/ { } |
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| 436 | OutEdgeIt(const ListGraph& G, NodeIt _v) /*: v(_v.node)*/ { edge=_v.node->_first_out_edge; } |
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[46] | 437 | OutEdgeIt& operator++() { edge=edge->_next_out; return *this; } |
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| 438 | protected: |
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[75] | 439 | NodeIt aNode() const { return NodeIt(edge->_tail); } |
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| 440 | NodeIt bNode() const { return NodeIt(edge->_head); } |
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[46] | 441 | }; |
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| 442 | |
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| 443 | class InEdgeIt : public EdgeIt { |
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| 444 | friend class ListGraph; |
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[75] | 445 | //node_item* v; |
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[59] | 446 | protected: |
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[75] | 447 | InEdgeIt(const NodeIt& _v) /*: v(_v.node)*/ { edge=_v.node->_first_in_edge; } |
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[46] | 448 | public: |
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[75] | 449 | InEdgeIt() : EdgeIt()/*, v(0)*/ { } |
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| 450 | InEdgeIt(const ListGraph& G, NodeIt _v) /*: v(_v.node)*/ { edge=_v.node->_first_in_edge; } |
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[46] | 451 | InEdgeIt& operator++() { edge=edge->_next_in; return *this; } |
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| 452 | protected: |
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[75] | 453 | NodeIt aNode() const { return NodeIt(edge->_head); } |
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| 454 | NodeIt bNode() const { return NodeIt(edge->_tail); } |
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[46] | 455 | }; |
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| 456 | |
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| 457 | class SymEdgeIt : public EdgeIt { |
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| 458 | friend class ListGraph; |
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| 459 | bool out_or_in; //1 iff out, 0 iff in |
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[75] | 460 | //node_item* v; |
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[46] | 461 | protected: |
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[75] | 462 | SymEdgeIt(const NodeIt& _v) /*: v(_v.node)*/ { |
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[46] | 463 | out_or_in=1; |
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[75] | 464 | edge=_v.node->_first_out_edge; |
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| 465 | if (!edge) { edge=_v.node->_first_in_edge; out_or_in=0; } |
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[46] | 466 | } |
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| 467 | public: |
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[75] | 468 | SymEdgeIt() : EdgeIt() /*, v(0)*/ { } |
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| 469 | SymEdgeIt(const ListGraph& G, NodeIt _v) /*: v(_v.node)*/ { |
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[46] | 470 | out_or_in=1; |
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[75] | 471 | edge=_v.node->_first_out_edge; |
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| 472 | if (!edge) { edge=_v.node->_first_in_edge; out_or_in=0; } |
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[46] | 473 | } |
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| 474 | SymEdgeIt& operator++() { |
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| 475 | if (out_or_in) { |
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[75] | 476 | node_item* v=edge->_tail; |
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[46] | 477 | edge=edge->_next_out; |
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| 478 | if (!edge) { out_or_in=0; edge=v->_first_in_edge; } |
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| 479 | } else { |
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| 480 | edge=edge->_next_in; |
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| 481 | } |
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| 482 | return *this; |
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| 483 | } |
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| 484 | protected: |
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[75] | 485 | NodeIt aNode() const { |
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| 486 | return (out_or_in) ? NodeIt(edge->_tail) : NodeIt(edge->_head); } |
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[46] | 487 | NodeIt bNode() const { |
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[75] | 488 | return (out_or_in) ? NodeIt(edge->_head) : NodeIt(edge->_tail); } |
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[46] | 489 | }; |
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| 490 | |
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| 491 | }; |
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| 492 | |
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| 493 | /* |
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| 494 | template< typename T > |
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| 495 | T ListGraph::first() const { |
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| 496 | std::cerr << "Invalid use of template<typemane T> T ListGraph::first<T>();" << std::endl; |
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| 497 | return T(); |
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| 498 | } |
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| 499 | |
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| 500 | template<> |
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| 501 | ListGraph::EachNodeIt ListGraph::first<ListGraph::EachNodeIt>() const { |
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| 502 | return firstNode(); |
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| 503 | } |
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| 504 | |
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| 505 | template<> |
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| 506 | ListGraph::EachEdgeIt ListGraph::first<ListGraph::EachEdgeIt>() const { |
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| 507 | return firstEdge(); |
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| 508 | } |
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| 509 | |
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| 510 | template< typename T > |
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| 511 | T ListGraph::first(ListGraph::NodeIt v) const { |
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| 512 | std::cerr << "Invalid use of template<typemane T> T ListGraph::first<T>(ListGRaph::NodeIt);" << std::endl; |
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| 513 | return T(); |
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| 514 | } |
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| 515 | |
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| 516 | template<> |
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| 517 | ListGraph::OutEdgeIt ListGraph::first<ListGraph::OutEdgeIt>(const ListGraph::NodeIt v) const { |
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| 518 | return firstOutEdge(v); |
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| 519 | } |
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| 520 | |
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| 521 | template<> |
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| 522 | ListGraph::InEdgeIt ListGraph::first<ListGraph::InEdgeIt>(const ListGraph::NodeIt v) const { |
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| 523 | return firstInEdge(v); |
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| 524 | } |
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| 525 | |
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| 526 | template<> |
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| 527 | ListGraph::SymEdgeIt ListGraph::first<ListGraph::SymEdgeIt>(const ListGraph::NodeIt v) const { |
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| 528 | return firstSymEdge(v); |
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| 529 | } |
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| 530 | */ |
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| 531 | |
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| 532 | |
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| 533 | } //namespace marci |
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| 534 | |
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[59] | 535 | #endif //LIST_GRAPH_HH |
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