1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2006 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_GRAPH_ADAPTOR_H |
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20 | #define LEMON_GRAPH_ADAPTOR_H |
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21 | |
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22 | /// \ingroup graph_adaptors |
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23 | /// \file |
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24 | /// \brief Several graph adaptors. |
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25 | /// |
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26 | /// This file contains several useful graph adaptor functions. |
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27 | /// |
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28 | /// \author Marton Makai and Balazs Dezso |
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29 | |
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30 | #include <lemon/bits/invalid.h> |
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31 | #include <lemon/maps.h> |
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32 | |
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33 | #include <lemon/bits/base_extender.h> |
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34 | #include <lemon/bits/graph_adaptor_extender.h> |
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35 | #include <lemon/bits/graph_extender.h> |
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36 | |
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37 | #include <iostream> |
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38 | |
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39 | namespace lemon { |
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40 | |
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41 | ///\brief Base type for the Graph Adaptors |
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42 | ///\ingroup graph_adaptors |
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43 | /// |
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44 | ///Base type for the Graph Adaptors |
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45 | /// |
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46 | ///\warning Graph adaptors are in even |
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47 | ///more experimental state than the other |
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48 | ///parts of the lib. Use them at you own risk. |
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49 | /// |
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50 | ///This is the base type for most of LEMON graph adaptors. |
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51 | ///This class implements a trivial graph adaptor i.e. it only wraps the |
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52 | ///functions and types of the graph. The purpose of this class is to |
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53 | ///make easier implementing graph adaptors. E.g. if an adaptor is |
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54 | ///considered which differs from the wrapped graph only in some of its |
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55 | ///functions or types, then it can be derived from GraphAdaptor, |
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56 | ///and only the |
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57 | ///differences should be implemented. |
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58 | /// |
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59 | ///author Marton Makai |
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60 | template<typename _Graph> |
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61 | class GraphAdaptorBase { |
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62 | public: |
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63 | typedef _Graph Graph; |
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64 | typedef GraphAdaptorBase Adaptor; |
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65 | typedef Graph ParentGraph; |
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66 | |
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67 | protected: |
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68 | Graph* graph; |
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69 | GraphAdaptorBase() : graph(0) { } |
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70 | void setGraph(Graph& _graph) { graph=&_graph; } |
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71 | |
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72 | public: |
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73 | GraphAdaptorBase(Graph& _graph) : graph(&_graph) { } |
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74 | |
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75 | typedef typename Graph::Node Node; |
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76 | typedef typename Graph::Edge Edge; |
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77 | |
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78 | void first(Node& i) const { graph->first(i); } |
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79 | void first(Edge& i) const { graph->first(i); } |
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80 | void firstIn(Edge& i, const Node& n) const { graph->firstIn(i, n); } |
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81 | void firstOut(Edge& i, const Node& n ) const { graph->firstOut(i, n); } |
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82 | |
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83 | void next(Node& i) const { graph->next(i); } |
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84 | void next(Edge& i) const { graph->next(i); } |
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85 | void nextIn(Edge& i) const { graph->nextIn(i); } |
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86 | void nextOut(Edge& i) const { graph->nextOut(i); } |
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87 | |
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88 | Node source(const Edge& e) const { return graph->source(e); } |
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89 | Node target(const Edge& e) const { return graph->target(e); } |
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90 | |
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91 | typedef NodeNumTagIndicator<Graph> NodeNumTag; |
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92 | int nodeNum() const { return graph->nodeNum(); } |
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93 | |
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94 | typedef EdgeNumTagIndicator<Graph> EdgeNumTag; |
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95 | int edgeNum() const { return graph->edgeNum(); } |
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96 | |
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97 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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98 | Edge findEdge(const Node& source, const Node& target, |
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99 | const Edge& prev = INVALID) { |
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100 | return graph->findEdge(source, target, prev); |
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101 | } |
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102 | |
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103 | Node addNode() const { |
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104 | return Node(graph->addNode()); |
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105 | } |
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106 | |
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107 | Edge addEdge(const Node& source, const Node& target) const { |
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108 | return Edge(graph->addEdge(source, target)); |
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109 | } |
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110 | |
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111 | void erase(const Node& i) const { graph->erase(i); } |
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112 | void erase(const Edge& i) const { graph->erase(i); } |
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113 | |
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114 | void clear() const { graph->clear(); } |
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115 | |
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116 | int id(const Node& v) const { return graph->id(v); } |
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117 | int id(const Edge& e) const { return graph->id(e); } |
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118 | |
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119 | Node fromNodeId(int id) const { |
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120 | return graph->fromNodeId(id); |
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121 | } |
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122 | |
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123 | Edge fromEdgeId(int id) const { |
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124 | return graph->fromEdgeId(id); |
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125 | } |
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126 | |
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127 | int maxNodeId() const { |
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128 | return graph->maxNodeId(); |
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129 | } |
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130 | |
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131 | int maxEdgeId() const { |
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132 | return graph->maxEdgeId(); |
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133 | } |
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134 | |
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135 | typedef typename ItemSetTraits<Graph, Node>::ItemNotifier NodeNotifier; |
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136 | |
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137 | NodeNotifier& getNotifier(Node) const { |
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138 | return graph->getNotifier(Node()); |
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139 | } |
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140 | |
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141 | typedef typename ItemSetTraits<Graph, Edge>::ItemNotifier EdgeNotifier; |
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142 | |
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143 | EdgeNotifier& getNotifier(Edge) const { |
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144 | return graph->getNotifier(Edge()); |
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145 | } |
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146 | |
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147 | template <typename _Value> |
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148 | class NodeMap : public Graph::template NodeMap<_Value> { |
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149 | public: |
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150 | |
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151 | typedef typename Graph::template NodeMap<_Value> Parent; |
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152 | |
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153 | explicit NodeMap(const Adaptor& ga) |
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154 | : Parent(*ga.graph) {} |
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155 | |
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156 | NodeMap(const Adaptor& ga, const _Value& value) |
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157 | : Parent(*ga.graph, value) { } |
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158 | |
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159 | NodeMap& operator=(const NodeMap& cmap) { |
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160 | return operator=<NodeMap>(cmap); |
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161 | } |
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162 | |
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163 | template <typename CMap> |
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164 | NodeMap& operator=(const CMap& cmap) { |
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165 | Parent::operator=(cmap); |
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166 | return *this; |
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167 | } |
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168 | |
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169 | }; |
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170 | |
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171 | template <typename _Value> |
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172 | class EdgeMap : public Graph::template EdgeMap<_Value> { |
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173 | public: |
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174 | |
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175 | typedef typename Graph::template EdgeMap<_Value> Parent; |
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176 | |
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177 | explicit EdgeMap(const Adaptor& ga) |
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178 | : Parent(*ga.graph) {} |
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179 | |
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180 | EdgeMap(const Adaptor& ga, const _Value& value) |
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181 | : Parent(*ga.graph, value) {} |
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182 | |
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183 | EdgeMap& operator=(const EdgeMap& cmap) { |
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184 | return operator=<EdgeMap>(cmap); |
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185 | } |
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186 | |
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187 | template <typename CMap> |
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188 | EdgeMap& operator=(const CMap& cmap) { |
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189 | Parent::operator=(cmap); |
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190 | return *this; |
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191 | } |
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192 | |
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193 | }; |
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194 | |
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195 | }; |
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196 | |
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197 | template <typename _Graph> |
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198 | class GraphAdaptor : |
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199 | public GraphAdaptorExtender<GraphAdaptorBase<_Graph> > { |
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200 | public: |
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201 | typedef _Graph Graph; |
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202 | typedef GraphAdaptorExtender<GraphAdaptorBase<_Graph> > Parent; |
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203 | protected: |
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204 | GraphAdaptor() : Parent() { } |
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205 | |
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206 | public: |
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207 | explicit GraphAdaptor(Graph& _graph) { setGraph(_graph); } |
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208 | }; |
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209 | |
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210 | /// \brief Just gives back a graph adaptor |
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211 | /// |
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212 | /// Just gives back a graph adaptor which |
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213 | /// should be provide original graph |
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214 | template<typename Graph> |
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215 | GraphAdaptor<const Graph> |
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216 | graphAdaptor(const Graph& graph) { |
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217 | return GraphAdaptor<const Graph>(graph); |
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218 | } |
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219 | |
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220 | |
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221 | template <typename _Graph> |
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222 | class RevGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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223 | public: |
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224 | typedef _Graph Graph; |
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225 | typedef GraphAdaptorBase<_Graph> Parent; |
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226 | protected: |
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227 | RevGraphAdaptorBase() : Parent() { } |
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228 | public: |
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229 | typedef typename Parent::Node Node; |
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230 | typedef typename Parent::Edge Edge; |
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231 | |
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232 | void firstIn(Edge& i, const Node& n) const { Parent::firstOut(i, n); } |
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233 | void firstOut(Edge& i, const Node& n ) const { Parent::firstIn(i, n); } |
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234 | |
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235 | void nextIn(Edge& i) const { Parent::nextOut(i); } |
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236 | void nextOut(Edge& i) const { Parent::nextIn(i); } |
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237 | |
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238 | Node source(const Edge& e) const { return Parent::target(e); } |
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239 | Node target(const Edge& e) const { return Parent::source(e); } |
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240 | |
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241 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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242 | Edge findEdge(const Node& source, const Node& target, |
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243 | const Edge& prev = INVALID) { |
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244 | return Parent::findEdge(target, source, prev); |
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245 | } |
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246 | |
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247 | }; |
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248 | |
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249 | |
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250 | ///\brief A graph adaptor which reverses the orientation of the edges. |
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251 | ///\ingroup graph_adaptors |
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252 | /// |
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253 | ///\warning Graph adaptors are in even more experimental |
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254 | ///state than the other |
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255 | ///parts of the lib. Use them at you own risk. |
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256 | /// |
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257 | /// If \c g is defined as |
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258 | ///\code |
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259 | /// ListGraph g; |
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260 | ///\endcode |
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261 | /// then |
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262 | ///\code |
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263 | /// RevGraphAdaptor<ListGraph> ga(g); |
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264 | ///\endcode |
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265 | ///implements the graph obtained from \c g by |
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266 | /// reversing the orientation of its edges. |
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267 | |
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268 | template<typename _Graph> |
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269 | class RevGraphAdaptor : |
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270 | public GraphAdaptorExtender<RevGraphAdaptorBase<_Graph> > { |
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271 | public: |
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272 | typedef _Graph Graph; |
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273 | typedef GraphAdaptorExtender< |
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274 | RevGraphAdaptorBase<_Graph> > Parent; |
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275 | protected: |
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276 | RevGraphAdaptor() { } |
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277 | public: |
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278 | explicit RevGraphAdaptor(_Graph& _graph) { setGraph(_graph); } |
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279 | }; |
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280 | |
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281 | /// \brief Just gives back a reverse graph adaptor |
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282 | /// |
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283 | /// Just gives back a reverse graph adaptor |
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284 | template<typename Graph> |
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285 | RevGraphAdaptor<const Graph> |
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286 | revGraphAdaptor(const Graph& graph) { |
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287 | return RevGraphAdaptor<const Graph>(graph); |
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288 | } |
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289 | |
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290 | template <typename _Graph, typename NodeFilterMap, |
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291 | typename EdgeFilterMap, bool checked = true> |
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292 | class SubGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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293 | public: |
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294 | typedef _Graph Graph; |
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295 | typedef SubGraphAdaptorBase Adaptor; |
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296 | typedef GraphAdaptorBase<_Graph> Parent; |
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297 | protected: |
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298 | NodeFilterMap* node_filter_map; |
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299 | EdgeFilterMap* edge_filter_map; |
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300 | SubGraphAdaptorBase() : Parent(), |
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301 | node_filter_map(0), edge_filter_map(0) { } |
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302 | |
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303 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
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304 | node_filter_map=&_node_filter_map; |
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305 | } |
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306 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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307 | edge_filter_map=&_edge_filter_map; |
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308 | } |
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309 | |
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310 | public: |
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311 | |
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312 | typedef typename Parent::Node Node; |
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313 | typedef typename Parent::Edge Edge; |
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314 | |
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315 | void first(Node& i) const { |
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316 | Parent::first(i); |
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317 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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318 | } |
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319 | |
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320 | void first(Edge& i) const { |
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321 | Parent::first(i); |
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322 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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323 | || !(*node_filter_map)[Parent::source(i)] |
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324 | || !(*node_filter_map)[Parent::target(i)])) Parent::next(i); |
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325 | } |
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326 | |
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327 | void firstIn(Edge& i, const Node& n) const { |
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328 | Parent::firstIn(i, n); |
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329 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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330 | || !(*node_filter_map)[Parent::source(i)])) Parent::nextIn(i); |
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331 | } |
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332 | |
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333 | void firstOut(Edge& i, const Node& n) const { |
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334 | Parent::firstOut(i, n); |
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335 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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336 | || !(*node_filter_map)[Parent::target(i)])) Parent::nextOut(i); |
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337 | } |
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338 | |
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339 | void next(Node& i) const { |
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340 | Parent::next(i); |
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341 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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342 | } |
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343 | |
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344 | void next(Edge& i) const { |
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345 | Parent::next(i); |
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346 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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347 | || !(*node_filter_map)[Parent::source(i)] |
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348 | || !(*node_filter_map)[Parent::target(i)])) Parent::next(i); |
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349 | } |
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350 | |
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351 | void nextIn(Edge& i) const { |
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352 | Parent::nextIn(i); |
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353 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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354 | || !(*node_filter_map)[Parent::source(i)])) Parent::nextIn(i); |
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355 | } |
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356 | |
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357 | void nextOut(Edge& i) const { |
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358 | Parent::nextOut(i); |
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359 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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360 | || !(*node_filter_map)[Parent::target(i)])) Parent::nextOut(i); |
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361 | } |
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362 | |
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363 | ///\e |
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364 | |
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365 | /// This function hides \c n in the graph, i.e. the iteration |
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366 | /// jumps over it. This is done by simply setting the value of \c n |
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367 | /// to be false in the corresponding node-map. |
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368 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
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369 | |
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370 | ///\e |
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371 | |
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372 | /// This function hides \c e in the graph, i.e. the iteration |
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373 | /// jumps over it. This is done by simply setting the value of \c e |
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374 | /// to be false in the corresponding edge-map. |
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375 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
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376 | |
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377 | ///\e |
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378 | |
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379 | /// The value of \c n is set to be true in the node-map which stores |
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380 | /// hide information. If \c n was hidden previuosly, then it is shown |
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381 | /// again |
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382 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
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383 | |
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384 | ///\e |
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385 | |
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386 | /// The value of \c e is set to be true in the edge-map which stores |
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387 | /// hide information. If \c e was hidden previuosly, then it is shown |
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388 | /// again |
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389 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
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390 | |
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391 | /// Returns true if \c n is hidden. |
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392 | |
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393 | ///\e |
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394 | /// |
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395 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
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396 | |
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397 | /// Returns true if \c n is hidden. |
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398 | |
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399 | ///\e |
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400 | /// |
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401 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
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402 | |
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403 | typedef False NodeNumTag; |
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404 | typedef False EdgeNumTag; |
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405 | |
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406 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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407 | Edge findEdge(const Node& source, const Node& target, |
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408 | const Edge& prev = INVALID) { |
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409 | if (!(*node_filter_map)[source] || !(*node_filter_map)[target]) { |
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410 | return INVALID; |
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411 | } |
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412 | Edge edge = Parent::findEdge(source, target, prev); |
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413 | while (edge != INVALID && !(*edge_filter_map)[edge]) { |
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414 | edge = Parent::findEdge(source, target, edge); |
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415 | } |
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416 | return edge; |
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417 | } |
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418 | |
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419 | template <typename _Value> |
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420 | class NodeMap |
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421 | : public SubMapExtender<Adaptor, |
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422 | typename Parent::template NodeMap<_Value> > |
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423 | { |
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424 | public: |
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425 | typedef Adaptor Graph; |
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426 | typedef SubMapExtender<Adaptor, typename Parent:: |
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427 | template NodeMap<_Value> > Parent; |
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428 | |
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429 | NodeMap(const Graph& graph) |
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430 | : Parent(graph) {} |
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431 | NodeMap(const Graph& graph, const _Value& value) |
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432 | : Parent(graph, value) {} |
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433 | |
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434 | NodeMap& operator=(const NodeMap& cmap) { |
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435 | return operator=<NodeMap>(cmap); |
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436 | } |
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437 | |
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438 | template <typename CMap> |
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439 | NodeMap& operator=(const CMap& cmap) { |
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440 | Parent::operator=(cmap); |
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441 | return *this; |
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442 | } |
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443 | }; |
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444 | |
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445 | template <typename _Value> |
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446 | class EdgeMap |
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447 | : public SubMapExtender<Adaptor, |
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448 | typename Parent::template EdgeMap<_Value> > |
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449 | { |
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450 | public: |
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451 | typedef Adaptor Graph; |
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452 | typedef SubMapExtender<Adaptor, typename Parent:: |
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453 | template EdgeMap<_Value> > Parent; |
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454 | |
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455 | EdgeMap(const Graph& graph) |
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456 | : Parent(graph) {} |
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457 | EdgeMap(const Graph& graph, const _Value& value) |
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458 | : Parent(graph, value) {} |
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459 | |
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460 | EdgeMap& operator=(const EdgeMap& cmap) { |
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461 | return operator=<EdgeMap>(cmap); |
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462 | } |
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463 | |
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464 | template <typename CMap> |
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465 | EdgeMap& operator=(const CMap& cmap) { |
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466 | Parent::operator=(cmap); |
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467 | return *this; |
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468 | } |
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469 | }; |
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470 | |
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471 | }; |
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472 | |
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473 | template <typename _Graph, typename NodeFilterMap, typename EdgeFilterMap> |
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474 | class SubGraphAdaptorBase<_Graph, NodeFilterMap, EdgeFilterMap, false> |
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475 | : public GraphAdaptorBase<_Graph> { |
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476 | public: |
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477 | typedef _Graph Graph; |
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478 | typedef SubGraphAdaptorBase Adaptor; |
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479 | typedef GraphAdaptorBase<_Graph> Parent; |
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480 | protected: |
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481 | NodeFilterMap* node_filter_map; |
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482 | EdgeFilterMap* edge_filter_map; |
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483 | SubGraphAdaptorBase() : Parent(), |
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484 | node_filter_map(0), edge_filter_map(0) { } |
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485 | |
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486 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
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487 | node_filter_map=&_node_filter_map; |
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488 | } |
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489 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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490 | edge_filter_map=&_edge_filter_map; |
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491 | } |
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492 | |
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493 | public: |
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494 | |
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495 | typedef typename Parent::Node Node; |
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496 | typedef typename Parent::Edge Edge; |
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497 | |
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498 | void first(Node& i) const { |
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499 | Parent::first(i); |
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500 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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501 | } |
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502 | |
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503 | void first(Edge& i) const { |
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504 | Parent::first(i); |
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505 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::next(i); |
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506 | } |
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507 | |
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508 | void firstIn(Edge& i, const Node& n) const { |
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509 | Parent::firstIn(i, n); |
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510 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextIn(i); |
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511 | } |
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512 | |
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513 | void firstOut(Edge& i, const Node& n) const { |
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514 | Parent::firstOut(i, n); |
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515 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextOut(i); |
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516 | } |
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517 | |
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518 | void next(Node& i) const { |
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519 | Parent::next(i); |
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520 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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521 | } |
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522 | void next(Edge& i) const { |
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523 | Parent::next(i); |
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524 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::next(i); |
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525 | } |
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526 | void nextIn(Edge& i) const { |
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527 | Parent::nextIn(i); |
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528 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextIn(i); |
---|
529 | } |
---|
530 | |
---|
531 | void nextOut(Edge& i) const { |
---|
532 | Parent::nextOut(i); |
---|
533 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextOut(i); |
---|
534 | } |
---|
535 | |
---|
536 | ///\e |
---|
537 | |
---|
538 | /// This function hides \c n in the graph, i.e. the iteration |
---|
539 | /// jumps over it. This is done by simply setting the value of \c n |
---|
540 | /// to be false in the corresponding node-map. |
---|
541 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
---|
542 | |
---|
543 | ///\e |
---|
544 | |
---|
545 | /// This function hides \c e in the graph, i.e. the iteration |
---|
546 | /// jumps over it. This is done by simply setting the value of \c e |
---|
547 | /// to be false in the corresponding edge-map. |
---|
548 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
---|
549 | |
---|
550 | ///\e |
---|
551 | |
---|
552 | /// The value of \c n is set to be true in the node-map which stores |
---|
553 | /// hide information. If \c n was hidden previuosly, then it is shown |
---|
554 | /// again |
---|
555 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
---|
556 | |
---|
557 | ///\e |
---|
558 | |
---|
559 | /// The value of \c e is set to be true in the edge-map which stores |
---|
560 | /// hide information. If \c e was hidden previuosly, then it is shown |
---|
561 | /// again |
---|
562 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
---|
563 | |
---|
564 | /// Returns true if \c n is hidden. |
---|
565 | |
---|
566 | ///\e |
---|
567 | /// |
---|
568 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
---|
569 | |
---|
570 | /// Returns true if \c n is hidden. |
---|
571 | |
---|
572 | ///\e |
---|
573 | /// |
---|
574 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
---|
575 | |
---|
576 | typedef False NodeNumTag; |
---|
577 | typedef False EdgeNumTag; |
---|
578 | |
---|
579 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
---|
580 | Edge findEdge(const Node& source, const Node& target, |
---|
581 | const Edge& prev = INVALID) { |
---|
582 | if (!(*node_filter_map)[source] || !(*node_filter_map)[target]) { |
---|
583 | return INVALID; |
---|
584 | } |
---|
585 | Edge edge = Parent::findEdge(source, target, prev); |
---|
586 | while (edge != INVALID && !(*edge_filter_map)[edge]) { |
---|
587 | edge = Parent::findEdge(source, target, edge); |
---|
588 | } |
---|
589 | return edge; |
---|
590 | } |
---|
591 | |
---|
592 | template <typename _Value> |
---|
593 | class NodeMap |
---|
594 | : public SubMapExtender<Adaptor, |
---|
595 | typename Parent::template NodeMap<_Value> > |
---|
596 | { |
---|
597 | public: |
---|
598 | typedef Adaptor Graph; |
---|
599 | typedef SubMapExtender<Adaptor, typename Parent:: |
---|
600 | template NodeMap<_Value> > Parent; |
---|
601 | |
---|
602 | NodeMap(const Graph& graph) |
---|
603 | : Parent(graph) {} |
---|
604 | NodeMap(const Graph& graph, const _Value& value) |
---|
605 | : Parent(graph, value) {} |
---|
606 | |
---|
607 | NodeMap& operator=(const NodeMap& cmap) { |
---|
608 | return operator=<NodeMap>(cmap); |
---|
609 | } |
---|
610 | |
---|
611 | template <typename CMap> |
---|
612 | NodeMap& operator=(const CMap& cmap) { |
---|
613 | Parent::operator=(cmap); |
---|
614 | return *this; |
---|
615 | } |
---|
616 | }; |
---|
617 | |
---|
618 | template <typename _Value> |
---|
619 | class EdgeMap |
---|
620 | : public SubMapExtender<Adaptor, |
---|
621 | typename Parent::template EdgeMap<_Value> > |
---|
622 | { |
---|
623 | public: |
---|
624 | typedef Adaptor Graph; |
---|
625 | typedef SubMapExtender<Adaptor, typename Parent:: |
---|
626 | template EdgeMap<_Value> > Parent; |
---|
627 | |
---|
628 | EdgeMap(const Graph& graph) |
---|
629 | : Parent(graph) {} |
---|
630 | EdgeMap(const Graph& graph, const _Value& value) |
---|
631 | : Parent(graph, value) {} |
---|
632 | |
---|
633 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
634 | return operator=<EdgeMap>(cmap); |
---|
635 | } |
---|
636 | |
---|
637 | template <typename CMap> |
---|
638 | EdgeMap& operator=(const CMap& cmap) { |
---|
639 | Parent::operator=(cmap); |
---|
640 | return *this; |
---|
641 | } |
---|
642 | }; |
---|
643 | |
---|
644 | }; |
---|
645 | |
---|
646 | /// \brief A graph adaptor for hiding nodes and edges from a graph. |
---|
647 | /// \ingroup graph_adaptors |
---|
648 | /// |
---|
649 | /// \warning Graph adaptors are in even more experimental state than the |
---|
650 | /// other parts of the lib. Use them at you own risk. |
---|
651 | /// |
---|
652 | /// SubGraphAdaptor shows the graph with filtered node-set and |
---|
653 | /// edge-set. If the \c checked parameter is true then it filters the edgeset |
---|
654 | /// to do not get invalid edges without source or target. |
---|
655 | /// Let \f$ G=(V, A) \f$ be a directed graph |
---|
656 | /// and suppose that the graph instance \c g of type ListGraph |
---|
657 | /// implements \f$ G \f$. |
---|
658 | /// Let moreover \f$ b_V \f$ and \f$ b_A \f$ be bool-valued functions resp. |
---|
659 | /// on the node-set and edge-set. |
---|
660 | /// SubGraphAdaptor<...>::NodeIt iterates |
---|
661 | /// on the node-set \f$ \{v\in V : b_V(v)=true\} \f$ and |
---|
662 | /// SubGraphAdaptor<...>::EdgeIt iterates |
---|
663 | /// on the edge-set \f$ \{e\in A : b_A(e)=true\} \f$. Similarly, |
---|
664 | /// SubGraphAdaptor<...>::OutEdgeIt and |
---|
665 | /// SubGraphAdaptor<...>::InEdgeIt iterates |
---|
666 | /// only on edges leaving and entering a specific node which have true value. |
---|
667 | /// |
---|
668 | /// If the \c checked template parameter is false then we have to note that |
---|
669 | /// the node-iterator cares only the filter on the node-set, and the |
---|
670 | /// edge-iterator cares only the filter on the edge-set. |
---|
671 | /// This way the edge-map |
---|
672 | /// should filter all edges which's source or target is filtered by the |
---|
673 | /// node-filter. |
---|
674 | ///\code |
---|
675 | /// typedef ListGraph Graph; |
---|
676 | /// Graph g; |
---|
677 | /// typedef Graph::Node Node; |
---|
678 | /// typedef Graph::Edge Edge; |
---|
679 | /// Node u=g.addNode(); //node of id 0 |
---|
680 | /// Node v=g.addNode(); //node of id 1 |
---|
681 | /// Node e=g.addEdge(u, v); //edge of id 0 |
---|
682 | /// Node f=g.addEdge(v, u); //edge of id 1 |
---|
683 | /// Graph::NodeMap<bool> nm(g, true); |
---|
684 | /// nm.set(u, false); |
---|
685 | /// Graph::EdgeMap<bool> em(g, true); |
---|
686 | /// em.set(e, false); |
---|
687 | /// typedef SubGraphAdaptor<Graph, Graph::NodeMap<bool>, Graph::EdgeMap<bool> > SubGA; |
---|
688 | /// SubGA ga(g, nm, em); |
---|
689 | /// for (SubGA::NodeIt n(ga); n!=INVALID; ++n) std::cout << g.id(n) << std::endl; |
---|
690 | /// std::cout << ":-)" << std::endl; |
---|
691 | /// for (SubGA::EdgeIt e(ga); e!=INVALID; ++e) std::cout << g.id(e) << std::endl; |
---|
692 | ///\endcode |
---|
693 | /// The output of the above code is the following. |
---|
694 | ///\code |
---|
695 | /// 1 |
---|
696 | /// :-) |
---|
697 | /// 1 |
---|
698 | ///\endcode |
---|
699 | /// Note that \c n is of type \c SubGA::NodeIt, but it can be converted to |
---|
700 | /// \c Graph::Node that is why \c g.id(n) can be applied. |
---|
701 | /// |
---|
702 | /// For other examples see also the documentation of NodeSubGraphAdaptor and |
---|
703 | /// EdgeSubGraphAdaptor. |
---|
704 | /// |
---|
705 | /// \author Marton Makai |
---|
706 | |
---|
707 | template<typename _Graph, typename NodeFilterMap, |
---|
708 | typename EdgeFilterMap, bool checked = true> |
---|
709 | class SubGraphAdaptor : |
---|
710 | public GraphAdaptorExtender< |
---|
711 | SubGraphAdaptorBase<_Graph, NodeFilterMap, EdgeFilterMap, checked> > { |
---|
712 | public: |
---|
713 | typedef _Graph Graph; |
---|
714 | typedef GraphAdaptorExtender< SubGraphAdaptorBase<_Graph, NodeFilterMap, |
---|
715 | EdgeFilterMap, checked> > |
---|
716 | Parent; |
---|
717 | |
---|
718 | protected: |
---|
719 | SubGraphAdaptor() { } |
---|
720 | public: |
---|
721 | |
---|
722 | SubGraphAdaptor(_Graph& _graph, NodeFilterMap& _node_filter_map, |
---|
723 | EdgeFilterMap& _edge_filter_map) { |
---|
724 | setGraph(_graph); |
---|
725 | setNodeFilterMap(_node_filter_map); |
---|
726 | setEdgeFilterMap(_edge_filter_map); |
---|
727 | } |
---|
728 | |
---|
729 | }; |
---|
730 | |
---|
731 | /// \brief Just gives back a sub graph adaptor |
---|
732 | /// |
---|
733 | /// Just gives back a sub graph adaptor |
---|
734 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
735 | SubGraphAdaptor<const Graph, NodeFilterMap, EdgeFilterMap> |
---|
736 | subGraphAdaptor(const Graph& graph, |
---|
737 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
738 | return SubGraphAdaptor<const Graph, NodeFilterMap, EdgeFilterMap> |
---|
739 | (graph, nfm, efm); |
---|
740 | } |
---|
741 | |
---|
742 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
743 | SubGraphAdaptor<const Graph, const NodeFilterMap, EdgeFilterMap> |
---|
744 | subGraphAdaptor(const Graph& graph, |
---|
745 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
746 | return SubGraphAdaptor<const Graph, const NodeFilterMap, EdgeFilterMap> |
---|
747 | (graph, nfm, efm); |
---|
748 | } |
---|
749 | |
---|
750 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
751 | SubGraphAdaptor<const Graph, NodeFilterMap, const EdgeFilterMap> |
---|
752 | subGraphAdaptor(const Graph& graph, |
---|
753 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
754 | return SubGraphAdaptor<const Graph, NodeFilterMap, const EdgeFilterMap> |
---|
755 | (graph, nfm, efm); |
---|
756 | } |
---|
757 | |
---|
758 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
759 | SubGraphAdaptor<const Graph, const NodeFilterMap, const EdgeFilterMap> |
---|
760 | subGraphAdaptor(const Graph& graph, |
---|
761 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
762 | return SubGraphAdaptor<const Graph, const NodeFilterMap, |
---|
763 | const EdgeFilterMap>(graph, nfm, efm); |
---|
764 | } |
---|
765 | |
---|
766 | |
---|
767 | |
---|
768 | ///\brief An adaptor for hiding nodes from a graph. |
---|
769 | ///\ingroup graph_adaptors |
---|
770 | /// |
---|
771 | ///\warning Graph adaptors are in even more experimental state |
---|
772 | ///than the other |
---|
773 | ///parts of the lib. Use them at you own risk. |
---|
774 | /// |
---|
775 | ///An adaptor for hiding nodes from a graph. |
---|
776 | ///This adaptor specializes SubGraphAdaptor in the way that only |
---|
777 | ///the node-set |
---|
778 | ///can be filtered. In usual case the checked parameter is true, we get the |
---|
779 | ///induced subgraph. But if the checked parameter is false then we can only |
---|
780 | ///filter only isolated nodes. |
---|
781 | ///\author Marton Makai |
---|
782 | template<typename Graph, typename NodeFilterMap, bool checked = true> |
---|
783 | class NodeSubGraphAdaptor : |
---|
784 | public SubGraphAdaptor<Graph, NodeFilterMap, |
---|
785 | ConstMap<typename Graph::Edge,bool>, checked> { |
---|
786 | public: |
---|
787 | |
---|
788 | typedef SubGraphAdaptor<Graph, NodeFilterMap, |
---|
789 | ConstMap<typename Graph::Edge,bool>, checked > |
---|
790 | Parent; |
---|
791 | |
---|
792 | protected: |
---|
793 | ConstMap<typename Graph::Edge, bool> const_true_map; |
---|
794 | |
---|
795 | NodeSubGraphAdaptor() : const_true_map(true) { |
---|
796 | Parent::setEdgeFilterMap(const_true_map); |
---|
797 | } |
---|
798 | |
---|
799 | public: |
---|
800 | |
---|
801 | NodeSubGraphAdaptor(Graph& _graph, NodeFilterMap& _node_filter_map) : |
---|
802 | Parent(), const_true_map(true) { |
---|
803 | Parent::setGraph(_graph); |
---|
804 | Parent::setNodeFilterMap(_node_filter_map); |
---|
805 | Parent::setEdgeFilterMap(const_true_map); |
---|
806 | } |
---|
807 | |
---|
808 | }; |
---|
809 | |
---|
810 | |
---|
811 | /// \brief Just gives back a node sub graph adaptor |
---|
812 | /// |
---|
813 | /// Just gives back a node sub graph adaptor |
---|
814 | template<typename Graph, typename NodeFilterMap> |
---|
815 | NodeSubGraphAdaptor<const Graph, NodeFilterMap> |
---|
816 | nodeSubGraphAdaptor(const Graph& graph, NodeFilterMap& nfm) { |
---|
817 | return NodeSubGraphAdaptor<const Graph, NodeFilterMap>(graph, nfm); |
---|
818 | } |
---|
819 | |
---|
820 | template<typename Graph, typename NodeFilterMap> |
---|
821 | NodeSubGraphAdaptor<const Graph, const NodeFilterMap> |
---|
822 | nodeSubGraphAdaptor(const Graph& graph, const NodeFilterMap& nfm) { |
---|
823 | return NodeSubGraphAdaptor<const Graph, const NodeFilterMap>(graph, nfm); |
---|
824 | } |
---|
825 | |
---|
826 | ///\brief An adaptor for hiding edges from a graph. |
---|
827 | /// |
---|
828 | ///\warning Graph adaptors are in even more experimental state |
---|
829 | ///than the other parts of the lib. Use them at you own risk. |
---|
830 | /// |
---|
831 | ///An adaptor for hiding edges from a graph. |
---|
832 | ///This adaptor specializes SubGraphAdaptor in the way that |
---|
833 | ///only the edge-set |
---|
834 | ///can be filtered. The usefulness of this adaptor is demonstrated in the |
---|
835 | ///problem of searching a maximum number of edge-disjoint shortest paths |
---|
836 | ///between |
---|
837 | ///two nodes \c s and \c t. Shortest here means being shortest w.r.t. |
---|
838 | ///non-negative edge-lengths. Note that |
---|
839 | ///the comprehension of the presented solution |
---|
840 | ///need's some elementary knowledge from combinatorial optimization. |
---|
841 | /// |
---|
842 | ///If a single shortest path is to be |
---|
843 | ///searched between \c s and \c t, then this can be done easily by |
---|
844 | ///applying the Dijkstra algorithm. What happens, if a maximum number of |
---|
845 | ///edge-disjoint shortest paths is to be computed. It can be proved that an |
---|
846 | ///edge can be in a shortest path if and only |
---|
847 | ///if it is tight with respect to |
---|
848 | ///the potential function computed by Dijkstra. |
---|
849 | ///Moreover, any path containing |
---|
850 | ///only such edges is a shortest one. |
---|
851 | ///Thus we have to compute a maximum number |
---|
852 | ///of edge-disjoint paths between \c s and \c t in |
---|
853 | ///the graph which has edge-set |
---|
854 | ///all the tight edges. The computation will be demonstrated |
---|
855 | ///on the following |
---|
856 | ///graph, which is read from the dimacs file \c sub_graph_adaptor_demo.dim. |
---|
857 | ///The full source code is available in \ref sub_graph_adaptor_demo.cc. |
---|
858 | ///If you are interested in more demo programs, you can use |
---|
859 | ///\ref dim_to_dot.cc to generate .dot files from dimacs files. |
---|
860 | ///The .dot file of the following figure was generated by |
---|
861 | ///the demo program \ref dim_to_dot.cc. |
---|
862 | /// |
---|
863 | ///\dot |
---|
864 | ///digraph lemon_dot_example { |
---|
865 | ///node [ shape=ellipse, fontname=Helvetica, fontsize=10 ]; |
---|
866 | ///n0 [ label="0 (s)" ]; |
---|
867 | ///n1 [ label="1" ]; |
---|
868 | ///n2 [ label="2" ]; |
---|
869 | ///n3 [ label="3" ]; |
---|
870 | ///n4 [ label="4" ]; |
---|
871 | ///n5 [ label="5" ]; |
---|
872 | ///n6 [ label="6 (t)" ]; |
---|
873 | ///edge [ shape=ellipse, fontname=Helvetica, fontsize=10 ]; |
---|
874 | ///n5 -> n6 [ label="9, length:4" ]; |
---|
875 | ///n4 -> n6 [ label="8, length:2" ]; |
---|
876 | ///n3 -> n5 [ label="7, length:1" ]; |
---|
877 | ///n2 -> n5 [ label="6, length:3" ]; |
---|
878 | ///n2 -> n6 [ label="5, length:5" ]; |
---|
879 | ///n2 -> n4 [ label="4, length:2" ]; |
---|
880 | ///n1 -> n4 [ label="3, length:3" ]; |
---|
881 | ///n0 -> n3 [ label="2, length:1" ]; |
---|
882 | ///n0 -> n2 [ label="1, length:2" ]; |
---|
883 | ///n0 -> n1 [ label="0, length:3" ]; |
---|
884 | ///} |
---|
885 | ///\enddot |
---|
886 | /// |
---|
887 | ///\code |
---|
888 | ///Graph g; |
---|
889 | ///Node s, t; |
---|
890 | ///LengthMap length(g); |
---|
891 | /// |
---|
892 | ///readDimacs(std::cin, g, length, s, t); |
---|
893 | /// |
---|
894 | ///cout << "edges with lengths (of form id, source--length->target): " << endl; |
---|
895 | ///for(EdgeIt e(g); e!=INVALID; ++e) |
---|
896 | /// cout << g.id(e) << ", " << g.id(g.source(e)) << "--" |
---|
897 | /// << length[e] << "->" << g.id(g.target(e)) << endl; |
---|
898 | /// |
---|
899 | ///cout << "s: " << g.id(s) << " t: " << g.id(t) << endl; |
---|
900 | ///\endcode |
---|
901 | ///Next, the potential function is computed with Dijkstra. |
---|
902 | ///\code |
---|
903 | ///typedef Dijkstra<Graph, LengthMap> Dijkstra; |
---|
904 | ///Dijkstra dijkstra(g, length); |
---|
905 | ///dijkstra.run(s); |
---|
906 | ///\endcode |
---|
907 | ///Next, we consrtruct a map which filters the edge-set to the tight edges. |
---|
908 | ///\code |
---|
909 | ///typedef TightEdgeFilterMap<Graph, const Dijkstra::DistMap, LengthMap> |
---|
910 | /// TightEdgeFilter; |
---|
911 | ///TightEdgeFilter tight_edge_filter(g, dijkstra.distMap(), length); |
---|
912 | /// |
---|
913 | ///typedef EdgeSubGraphAdaptor<Graph, TightEdgeFilter> SubGA; |
---|
914 | ///SubGA ga(g, tight_edge_filter); |
---|
915 | ///\endcode |
---|
916 | ///Then, the maximum nimber of edge-disjoint \c s-\c t paths are computed |
---|
917 | ///with a max flow algorithm Preflow. |
---|
918 | ///\code |
---|
919 | ///ConstMap<Edge, int> const_1_map(1); |
---|
920 | ///Graph::EdgeMap<int> flow(g, 0); |
---|
921 | /// |
---|
922 | ///Preflow<SubGA, int, ConstMap<Edge, int>, Graph::EdgeMap<int> > |
---|
923 | /// preflow(ga, s, t, const_1_map, flow); |
---|
924 | ///preflow.run(); |
---|
925 | ///\endcode |
---|
926 | ///Last, the output is: |
---|
927 | ///\code |
---|
928 | ///cout << "maximum number of edge-disjoint shortest path: " |
---|
929 | /// << preflow.flowValue() << endl; |
---|
930 | ///cout << "edges of the maximum number of edge-disjoint shortest s-t paths: " |
---|
931 | /// << endl; |
---|
932 | ///for(EdgeIt e(g); e!=INVALID; ++e) |
---|
933 | /// if (flow[e]) |
---|
934 | /// cout << " " << g.id(g.source(e)) << "--" |
---|
935 | /// << length[e] << "->" << g.id(g.target(e)) << endl; |
---|
936 | ///\endcode |
---|
937 | ///The program has the following (expected :-)) output: |
---|
938 | ///\code |
---|
939 | ///edges with lengths (of form id, source--length->target): |
---|
940 | /// 9, 5--4->6 |
---|
941 | /// 8, 4--2->6 |
---|
942 | /// 7, 3--1->5 |
---|
943 | /// 6, 2--3->5 |
---|
944 | /// 5, 2--5->6 |
---|
945 | /// 4, 2--2->4 |
---|
946 | /// 3, 1--3->4 |
---|
947 | /// 2, 0--1->3 |
---|
948 | /// 1, 0--2->2 |
---|
949 | /// 0, 0--3->1 |
---|
950 | ///s: 0 t: 6 |
---|
951 | ///maximum number of edge-disjoint shortest path: 2 |
---|
952 | ///edges of the maximum number of edge-disjoint shortest s-t paths: |
---|
953 | /// 9, 5--4->6 |
---|
954 | /// 8, 4--2->6 |
---|
955 | /// 7, 3--1->5 |
---|
956 | /// 4, 2--2->4 |
---|
957 | /// 2, 0--1->3 |
---|
958 | /// 1, 0--2->2 |
---|
959 | ///\endcode |
---|
960 | /// |
---|
961 | ///\author Marton Makai |
---|
962 | template<typename Graph, typename EdgeFilterMap> |
---|
963 | class EdgeSubGraphAdaptor : |
---|
964 | public SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
965 | EdgeFilterMap, false> { |
---|
966 | public: |
---|
967 | typedef SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
968 | EdgeFilterMap, false> Parent; |
---|
969 | protected: |
---|
970 | ConstMap<typename Graph::Node, bool> const_true_map; |
---|
971 | |
---|
972 | EdgeSubGraphAdaptor() : const_true_map(true) { |
---|
973 | Parent::setNodeFilterMap(const_true_map); |
---|
974 | } |
---|
975 | |
---|
976 | public: |
---|
977 | |
---|
978 | EdgeSubGraphAdaptor(Graph& _graph, EdgeFilterMap& _edge_filter_map) : |
---|
979 | Parent(), const_true_map(true) { |
---|
980 | Parent::setGraph(_graph); |
---|
981 | Parent::setNodeFilterMap(const_true_map); |
---|
982 | Parent::setEdgeFilterMap(_edge_filter_map); |
---|
983 | } |
---|
984 | |
---|
985 | }; |
---|
986 | |
---|
987 | /// \brief Just gives back an edge sub graph adaptor |
---|
988 | /// |
---|
989 | /// Just gives back an edge sub graph adaptor |
---|
990 | template<typename Graph, typename EdgeFilterMap> |
---|
991 | EdgeSubGraphAdaptor<const Graph, EdgeFilterMap> |
---|
992 | edgeSubGraphAdaptor(const Graph& graph, EdgeFilterMap& efm) { |
---|
993 | return EdgeSubGraphAdaptor<const Graph, EdgeFilterMap>(graph, efm); |
---|
994 | } |
---|
995 | |
---|
996 | template<typename Graph, typename EdgeFilterMap> |
---|
997 | EdgeSubGraphAdaptor<const Graph, const EdgeFilterMap> |
---|
998 | edgeSubGraphAdaptor(const Graph& graph, const EdgeFilterMap& efm) { |
---|
999 | return EdgeSubGraphAdaptor<const Graph, const EdgeFilterMap>(graph, efm); |
---|
1000 | } |
---|
1001 | |
---|
1002 | template <typename _Graph, typename Enable = void> |
---|
1003 | class UndirGraphAdaptorBase : |
---|
1004 | public UGraphBaseExtender<GraphAdaptorBase<_Graph> > { |
---|
1005 | public: |
---|
1006 | typedef _Graph Graph; |
---|
1007 | typedef UndirGraphAdaptorBase Adaptor; |
---|
1008 | typedef UGraphBaseExtender<GraphAdaptorBase<_Graph> > Parent; |
---|
1009 | |
---|
1010 | protected: |
---|
1011 | |
---|
1012 | UndirGraphAdaptorBase() : Parent() {} |
---|
1013 | |
---|
1014 | public: |
---|
1015 | |
---|
1016 | typedef typename Parent::UEdge UEdge; |
---|
1017 | typedef typename Parent::Edge Edge; |
---|
1018 | |
---|
1019 | private: |
---|
1020 | |
---|
1021 | template <typename _Value> |
---|
1022 | class EdgeMapBase { |
---|
1023 | private: |
---|
1024 | |
---|
1025 | typedef typename _Graph::template EdgeMap<_Value> MapImpl; |
---|
1026 | |
---|
1027 | public: |
---|
1028 | |
---|
1029 | typedef typename MapTraits<MapImpl>::ReferenceMapTag ReferenceMapTag; |
---|
1030 | |
---|
1031 | typedef _Value Value; |
---|
1032 | typedef Edge Key; |
---|
1033 | |
---|
1034 | EdgeMapBase(const Adaptor& adaptor) : |
---|
1035 | forward_map(*adaptor.graph), backward_map(*adaptor.graph) {} |
---|
1036 | |
---|
1037 | EdgeMapBase(const Adaptor& adaptor, const Value& v) |
---|
1038 | : forward_map(*adaptor.graph, v), backward_map(*adaptor.graph, v) {} |
---|
1039 | |
---|
1040 | void set(const Edge& e, const Value& a) { |
---|
1041 | if (Parent::direction(e)) { |
---|
1042 | forward_map.set(e, a); |
---|
1043 | } else { |
---|
1044 | backward_map.set(e, a); |
---|
1045 | } |
---|
1046 | } |
---|
1047 | |
---|
1048 | typename MapTraits<MapImpl>::ConstReturnValue operator[](Edge e) const { |
---|
1049 | if (Parent::direction(e)) { |
---|
1050 | return forward_map[e]; |
---|
1051 | } else { |
---|
1052 | return backward_map[e]; |
---|
1053 | } |
---|
1054 | } |
---|
1055 | |
---|
1056 | typename MapTraits<MapImpl>::ReturnValue operator[](Edge e) { |
---|
1057 | if (Parent::direction(e)) { |
---|
1058 | return forward_map[e]; |
---|
1059 | } else { |
---|
1060 | return backward_map[e]; |
---|
1061 | } |
---|
1062 | } |
---|
1063 | |
---|
1064 | protected: |
---|
1065 | |
---|
1066 | MapImpl forward_map, backward_map; |
---|
1067 | |
---|
1068 | }; |
---|
1069 | |
---|
1070 | public: |
---|
1071 | |
---|
1072 | template <typename _Value> |
---|
1073 | class EdgeMap |
---|
1074 | : public SubMapExtender<Adaptor, EdgeMapBase<_Value> > |
---|
1075 | { |
---|
1076 | public: |
---|
1077 | typedef Adaptor Graph; |
---|
1078 | typedef SubMapExtender<Adaptor, EdgeMapBase<_Value> > Parent; |
---|
1079 | |
---|
1080 | EdgeMap(const Graph& graph) |
---|
1081 | : Parent(graph) {} |
---|
1082 | EdgeMap(const Graph& graph, const _Value& value) |
---|
1083 | : Parent(graph, value) {} |
---|
1084 | |
---|
1085 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
1086 | return operator=<EdgeMap>(cmap); |
---|
1087 | } |
---|
1088 | |
---|
1089 | template <typename CMap> |
---|
1090 | EdgeMap& operator=(const CMap& cmap) { |
---|
1091 | Parent::operator=(cmap); |
---|
1092 | return *this; |
---|
1093 | } |
---|
1094 | }; |
---|
1095 | |
---|
1096 | template <typename _Value> |
---|
1097 | class UEdgeMap : public Graph::template EdgeMap<_Value> { |
---|
1098 | public: |
---|
1099 | |
---|
1100 | typedef typename Graph::template EdgeMap<_Value> Parent; |
---|
1101 | |
---|
1102 | explicit UEdgeMap(const Adaptor& ga) |
---|
1103 | : Parent(*ga.graph) {} |
---|
1104 | |
---|
1105 | UEdgeMap(const Adaptor& ga, const _Value& value) |
---|
1106 | : Parent(*ga.graph, value) {} |
---|
1107 | |
---|
1108 | UEdgeMap& operator=(const UEdgeMap& cmap) { |
---|
1109 | return operator=<UEdgeMap>(cmap); |
---|
1110 | } |
---|
1111 | |
---|
1112 | template <typename CMap> |
---|
1113 | UEdgeMap& operator=(const CMap& cmap) { |
---|
1114 | Parent::operator=(cmap); |
---|
1115 | return *this; |
---|
1116 | } |
---|
1117 | |
---|
1118 | }; |
---|
1119 | |
---|
1120 | }; |
---|
1121 | |
---|
1122 | template <typename _Graph> |
---|
1123 | class UndirGraphAdaptorBase< |
---|
1124 | _Graph, typename enable_if< |
---|
1125 | typename _Graph::EdgeNotifier::Notifier>::type > |
---|
1126 | : public UGraphBaseExtender<GraphAdaptorBase<_Graph> > { |
---|
1127 | public: |
---|
1128 | |
---|
1129 | typedef _Graph Graph; |
---|
1130 | typedef UndirGraphAdaptorBase Adaptor; |
---|
1131 | typedef UGraphBaseExtender<GraphAdaptorBase<_Graph> > Parent; |
---|
1132 | |
---|
1133 | protected: |
---|
1134 | |
---|
1135 | UndirGraphAdaptorBase() |
---|
1136 | : edge_notifier(*this), edge_notifier_proxy(edge_notifier) {} |
---|
1137 | |
---|
1138 | void setGraph(_Graph& graph) { |
---|
1139 | Parent::setGraph(graph); |
---|
1140 | edge_notifier_proxy.setUEdgeNotifier(graph.getNotifier(UEdge())); |
---|
1141 | } |
---|
1142 | |
---|
1143 | public: |
---|
1144 | |
---|
1145 | ~UndirGraphAdaptorBase() { |
---|
1146 | edge_notifier.clear(); |
---|
1147 | } |
---|
1148 | |
---|
1149 | int maxId(typename Parent::Edge) const { |
---|
1150 | return Parent::maxEdgeId(); |
---|
1151 | } |
---|
1152 | |
---|
1153 | |
---|
1154 | typedef typename Parent::UEdge UEdge; |
---|
1155 | typedef typename Parent::Edge Edge; |
---|
1156 | |
---|
1157 | typedef typename Parent::EdgeNotifier UEdgeNotifier; |
---|
1158 | |
---|
1159 | using Parent::getNotifier; |
---|
1160 | |
---|
1161 | typedef AlterationNotifier<UndirGraphAdaptorBase, Edge> EdgeNotifier; |
---|
1162 | EdgeNotifier& getNotifier(Edge) const { return edge_notifier; } |
---|
1163 | |
---|
1164 | protected: |
---|
1165 | |
---|
1166 | class NotifierProxy : public UEdgeNotifier::ObserverBase { |
---|
1167 | public: |
---|
1168 | |
---|
1169 | typedef typename UEdgeNotifier::ObserverBase Parent; |
---|
1170 | typedef UndirGraphAdaptorBase AdaptorBase; |
---|
1171 | |
---|
1172 | NotifierProxy(EdgeNotifier& _edge_notifier) |
---|
1173 | : Parent(), edge_notifier(_edge_notifier) { |
---|
1174 | } |
---|
1175 | |
---|
1176 | virtual ~NotifierProxy() { |
---|
1177 | if (Parent::attached()) { |
---|
1178 | Parent::detach(); |
---|
1179 | } |
---|
1180 | } |
---|
1181 | |
---|
1182 | void setUEdgeNotifier(UEdgeNotifier& _uedge_notifier) { |
---|
1183 | Parent::attach(_uedge_notifier); |
---|
1184 | } |
---|
1185 | |
---|
1186 | |
---|
1187 | protected: |
---|
1188 | |
---|
1189 | virtual void add(const UEdge& uedge) { |
---|
1190 | std::vector<Edge> edges; |
---|
1191 | edges.push_back(AdaptorBase::Parent::direct(uedge, true)); |
---|
1192 | edges.push_back(AdaptorBase::Parent::direct(uedge, false)); |
---|
1193 | edge_notifier.add(edges); |
---|
1194 | } |
---|
1195 | virtual void add(const std::vector<UEdge>& uedges) { |
---|
1196 | std::vector<Edge> edges; |
---|
1197 | for (int i = 0; i < (int)uedges.size(); ++i) { |
---|
1198 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], true)); |
---|
1199 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], false)); |
---|
1200 | } |
---|
1201 | edge_notifier.add(edges); |
---|
1202 | } |
---|
1203 | virtual void erase(const UEdge& uedge) { |
---|
1204 | std::vector<Edge> edges; |
---|
1205 | edges.push_back(AdaptorBase::Parent::direct(uedge, true)); |
---|
1206 | edges.push_back(AdaptorBase::Parent::direct(uedge, false)); |
---|
1207 | edge_notifier.erase(edges); |
---|
1208 | } |
---|
1209 | virtual void erase(const std::vector<UEdge>& uedges) { |
---|
1210 | std::vector<Edge> edges; |
---|
1211 | for (int i = 0; i < (int)uedges.size(); ++i) { |
---|
1212 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], true)); |
---|
1213 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], false)); |
---|
1214 | } |
---|
1215 | edge_notifier.erase(edges); |
---|
1216 | } |
---|
1217 | virtual void build() { |
---|
1218 | edge_notifier.build(); |
---|
1219 | } |
---|
1220 | virtual void clear() { |
---|
1221 | edge_notifier.clear(); |
---|
1222 | } |
---|
1223 | |
---|
1224 | EdgeNotifier& edge_notifier; |
---|
1225 | }; |
---|
1226 | |
---|
1227 | |
---|
1228 | mutable EdgeNotifier edge_notifier; |
---|
1229 | NotifierProxy edge_notifier_proxy; |
---|
1230 | |
---|
1231 | private: |
---|
1232 | |
---|
1233 | template <typename _Value> |
---|
1234 | class EdgeMapBase { |
---|
1235 | private: |
---|
1236 | |
---|
1237 | typedef typename _Graph::template EdgeMap<_Value> MapImpl; |
---|
1238 | |
---|
1239 | public: |
---|
1240 | |
---|
1241 | typedef typename MapTraits<MapImpl>::ReferenceMapTag ReferenceMapTag; |
---|
1242 | |
---|
1243 | typedef _Value Value; |
---|
1244 | typedef Edge Key; |
---|
1245 | |
---|
1246 | EdgeMapBase(const Adaptor& adaptor) : |
---|
1247 | forward_map(*adaptor.graph), backward_map(*adaptor.graph) {} |
---|
1248 | |
---|
1249 | EdgeMapBase(const Adaptor& adaptor, const Value& v) |
---|
1250 | : forward_map(*adaptor.graph, v), backward_map(*adaptor.graph, v) {} |
---|
1251 | |
---|
1252 | void set(const Edge& e, const Value& a) { |
---|
1253 | if (Parent::direction(e)) { |
---|
1254 | forward_map.set(e, a); |
---|
1255 | } else { |
---|
1256 | backward_map.set(e, a); |
---|
1257 | } |
---|
1258 | } |
---|
1259 | |
---|
1260 | typename MapTraits<MapImpl>::ConstReturnValue operator[](Edge e) const { |
---|
1261 | if (Parent::direction(e)) { |
---|
1262 | return forward_map[e]; |
---|
1263 | } else { |
---|
1264 | return backward_map[e]; |
---|
1265 | } |
---|
1266 | } |
---|
1267 | |
---|
1268 | typename MapTraits<MapImpl>::ReturnValue operator[](Edge e) { |
---|
1269 | if (Parent::direction(e)) { |
---|
1270 | return forward_map[e]; |
---|
1271 | } else { |
---|
1272 | return backward_map[e]; |
---|
1273 | } |
---|
1274 | } |
---|
1275 | |
---|
1276 | protected: |
---|
1277 | |
---|
1278 | MapImpl forward_map, backward_map; |
---|
1279 | |
---|
1280 | }; |
---|
1281 | |
---|
1282 | public: |
---|
1283 | |
---|
1284 | template <typename _Value> |
---|
1285 | class EdgeMap |
---|
1286 | : public SubMapExtender<Adaptor, EdgeMapBase<_Value> > |
---|
1287 | { |
---|
1288 | public: |
---|
1289 | typedef Adaptor Graph; |
---|
1290 | typedef SubMapExtender<Adaptor, EdgeMapBase<_Value> > Parent; |
---|
1291 | |
---|
1292 | EdgeMap(const Graph& graph) |
---|
1293 | : Parent(graph) {} |
---|
1294 | EdgeMap(const Graph& graph, const _Value& value) |
---|
1295 | : Parent(graph, value) {} |
---|
1296 | |
---|
1297 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
1298 | return operator=<EdgeMap>(cmap); |
---|
1299 | } |
---|
1300 | |
---|
1301 | template <typename CMap> |
---|
1302 | EdgeMap& operator=(const CMap& cmap) { |
---|
1303 | Parent::operator=(cmap); |
---|
1304 | return *this; |
---|
1305 | } |
---|
1306 | }; |
---|
1307 | |
---|
1308 | template <typename _Value> |
---|
1309 | class UEdgeMap : public Graph::template EdgeMap<_Value> { |
---|
1310 | public: |
---|
1311 | |
---|
1312 | typedef typename Graph::template EdgeMap<_Value> Parent; |
---|
1313 | |
---|
1314 | explicit UEdgeMap(const Adaptor& ga) |
---|
1315 | : Parent(*ga.graph) {} |
---|
1316 | |
---|
1317 | UEdgeMap(const Adaptor& ga, const _Value& value) |
---|
1318 | : Parent(*ga.graph, value) {} |
---|
1319 | |
---|
1320 | UEdgeMap& operator=(const UEdgeMap& cmap) { |
---|
1321 | return operator=<UEdgeMap>(cmap); |
---|
1322 | } |
---|
1323 | |
---|
1324 | template <typename CMap> |
---|
1325 | UEdgeMap& operator=(const CMap& cmap) { |
---|
1326 | Parent::operator=(cmap); |
---|
1327 | return *this; |
---|
1328 | } |
---|
1329 | |
---|
1330 | }; |
---|
1331 | |
---|
1332 | }; |
---|
1333 | |
---|
1334 | ///\brief An undirected graph is made from a directed graph by an adaptor |
---|
1335 | ///\ingroup graph_adaptors |
---|
1336 | /// |
---|
1337 | /// Undocumented, untested!!! |
---|
1338 | /// If somebody knows nice demo application, let's polulate it. |
---|
1339 | /// |
---|
1340 | /// \author Marton Makai |
---|
1341 | template<typename _Graph> |
---|
1342 | class UndirGraphAdaptor : |
---|
1343 | public UGraphAdaptorExtender< |
---|
1344 | UndirGraphAdaptorBase<_Graph> > { |
---|
1345 | public: |
---|
1346 | typedef _Graph Graph; |
---|
1347 | typedef UGraphAdaptorExtender< |
---|
1348 | UndirGraphAdaptorBase<_Graph> > Parent; |
---|
1349 | protected: |
---|
1350 | UndirGraphAdaptor() { } |
---|
1351 | public: |
---|
1352 | UndirGraphAdaptor(_Graph& _graph) { |
---|
1353 | setGraph(_graph); |
---|
1354 | } |
---|
1355 | |
---|
1356 | template <typename _ForwardMap, typename _BackwardMap> |
---|
1357 | class CombinedEdgeMap { |
---|
1358 | public: |
---|
1359 | |
---|
1360 | typedef _ForwardMap ForwardMap; |
---|
1361 | typedef _BackwardMap BackwardMap; |
---|
1362 | |
---|
1363 | typedef typename MapTraits<ForwardMap>::ReferenceMapTag ReferenceMapTag; |
---|
1364 | |
---|
1365 | typedef typename ForwardMap::Value Value; |
---|
1366 | typedef typename Parent::Edge Key; |
---|
1367 | |
---|
1368 | CombinedEdgeMap() : forward_map(0), backward_map(0) {} |
---|
1369 | |
---|
1370 | CombinedEdgeMap(ForwardMap& _forward_map, BackwardMap& _backward_map) |
---|
1371 | : forward_map(&_forward_map), backward_map(&_backward_map) {} |
---|
1372 | |
---|
1373 | void set(const Key& e, const Value& a) { |
---|
1374 | if (Parent::direction(e)) { |
---|
1375 | forward_map->set(e, a); |
---|
1376 | } else { |
---|
1377 | backward_map->set(e, a); |
---|
1378 | } |
---|
1379 | } |
---|
1380 | |
---|
1381 | typename MapTraits<ForwardMap>::ConstReturnValue |
---|
1382 | operator[](const Key& e) const { |
---|
1383 | if (Parent::direction(e)) { |
---|
1384 | return (*forward_map)[e]; |
---|
1385 | } else { |
---|
1386 | return (*backward_map)[e]; |
---|
1387 | } |
---|
1388 | } |
---|
1389 | |
---|
1390 | typename MapTraits<ForwardMap>::ReturnValue |
---|
1391 | operator[](const Key& e) { |
---|
1392 | if (Parent::direction(e)) { |
---|
1393 | return (*forward_map)[e]; |
---|
1394 | } else { |
---|
1395 | return (*backward_map)[e]; |
---|
1396 | } |
---|
1397 | } |
---|
1398 | |
---|
1399 | void setForwardMap(ForwardMap& _forward_map) { |
---|
1400 | forward_map = &_forward_map; |
---|
1401 | } |
---|
1402 | |
---|
1403 | void setBackwardMap(BackwardMap& _backward_map) { |
---|
1404 | backward_map = &_backward_map; |
---|
1405 | } |
---|
1406 | |
---|
1407 | protected: |
---|
1408 | |
---|
1409 | ForwardMap* forward_map; |
---|
1410 | BackwardMap* backward_map; |
---|
1411 | |
---|
1412 | }; |
---|
1413 | |
---|
1414 | }; |
---|
1415 | |
---|
1416 | /// \brief Just gives back an undir graph adaptor |
---|
1417 | /// |
---|
1418 | /// Just gives back an undir graph adaptor |
---|
1419 | template<typename Graph> |
---|
1420 | UndirGraphAdaptor<const Graph> |
---|
1421 | undirGraphAdaptor(const Graph& graph) { |
---|
1422 | return UndirGraphAdaptor<const Graph>(graph); |
---|
1423 | } |
---|
1424 | |
---|
1425 | template<typename Graph, typename Number, |
---|
1426 | typename CapacityMap, typename FlowMap> |
---|
1427 | class ResForwardFilter { |
---|
1428 | const CapacityMap* capacity; |
---|
1429 | const FlowMap* flow; |
---|
1430 | public: |
---|
1431 | typedef typename Graph::Edge Key; |
---|
1432 | typedef bool Value; |
---|
1433 | |
---|
1434 | ResForwardFilter(const CapacityMap& _capacity, const FlowMap& _flow) |
---|
1435 | : capacity(&_capacity), flow(&_flow) { } |
---|
1436 | ResForwardFilter() : capacity(0), flow(0) { } |
---|
1437 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
1438 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
1439 | bool operator[](const typename Graph::Edge& e) const { |
---|
1440 | return (Number((*flow)[e]) < Number((*capacity)[e])); |
---|
1441 | } |
---|
1442 | }; |
---|
1443 | |
---|
1444 | template<typename Graph, typename Number, |
---|
1445 | typename CapacityMap, typename FlowMap> |
---|
1446 | class ResBackwardFilter { |
---|
1447 | const CapacityMap* capacity; |
---|
1448 | const FlowMap* flow; |
---|
1449 | public: |
---|
1450 | typedef typename Graph::Edge Key; |
---|
1451 | typedef bool Value; |
---|
1452 | |
---|
1453 | ResBackwardFilter(const CapacityMap& _capacity, const FlowMap& _flow) |
---|
1454 | : capacity(&_capacity), flow(&_flow) { } |
---|
1455 | ResBackwardFilter() : capacity(0), flow(0) { } |
---|
1456 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
1457 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
1458 | bool operator[](const typename Graph::Edge& e) const { |
---|
1459 | return (Number(0) < Number((*flow)[e])); |
---|
1460 | } |
---|
1461 | }; |
---|
1462 | |
---|
1463 | |
---|
1464 | ///\brief An adaptor for composing the residual |
---|
1465 | ///graph for directed flow and circulation problems. |
---|
1466 | ///\ingroup graph_adaptors |
---|
1467 | /// |
---|
1468 | ///An adaptor for composing the residual graph for |
---|
1469 | ///directed flow and circulation problems. |
---|
1470 | ///Let \f$ G=(V, A) \f$ be a directed graph and let \f$ F \f$ be a |
---|
1471 | ///number type. Let moreover |
---|
1472 | ///\f$ f,c:A\to F \f$, be functions on the edge-set. |
---|
1473 | ///In the appications of ResGraphAdaptor, \f$ f \f$ usually stands for a flow |
---|
1474 | ///and \f$ c \f$ for a capacity function. |
---|
1475 | ///Suppose that a graph instange \c g of type |
---|
1476 | ///\c ListGraph implements \f$ G \f$. |
---|
1477 | ///\code |
---|
1478 | /// ListGraph g; |
---|
1479 | ///\endcode |
---|
1480 | ///Then RevGraphAdaptor implements the graph structure with node-set |
---|
1481 | ///\f$ V \f$ and edge-set \f$ A_{forward}\cup A_{backward} \f$, where |
---|
1482 | ///\f$ A_{forward}=\{uv : uv\in A, f(uv)<c(uv)\} \f$ and |
---|
1483 | ///\f$ A_{backward}=\{vu : uv\in A, f(uv)>0\} \f$, |
---|
1484 | ///i.e. the so called residual graph. |
---|
1485 | ///When we take the union \f$ A_{forward}\cup A_{backward} \f$, |
---|
1486 | ///multilicities are counted, i.e. if an edge is in both |
---|
1487 | ///\f$ A_{forward} \f$ and \f$ A_{backward} \f$, then in the adaptor it |
---|
1488 | ///appears twice. |
---|
1489 | ///The following code shows how |
---|
1490 | ///such an instance can be constructed. |
---|
1491 | ///\code |
---|
1492 | ///typedef ListGraph Graph; |
---|
1493 | ///Graph::EdgeMap<int> f(g); |
---|
1494 | ///Graph::EdgeMap<int> c(g); |
---|
1495 | ///ResGraphAdaptor<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > ga(g); |
---|
1496 | ///\endcode |
---|
1497 | ///\author Marton Makai |
---|
1498 | /// |
---|
1499 | template<typename Graph, typename Number, |
---|
1500 | typename CapacityMap, typename FlowMap> |
---|
1501 | class ResGraphAdaptor : |
---|
1502 | public EdgeSubGraphAdaptor< |
---|
1503 | UndirGraphAdaptor<Graph>, |
---|
1504 | typename UndirGraphAdaptor<Graph>::template CombinedEdgeMap< |
---|
1505 | ResForwardFilter<Graph, Number, CapacityMap, FlowMap>, |
---|
1506 | ResBackwardFilter<Graph, Number, CapacityMap, FlowMap> > > { |
---|
1507 | public: |
---|
1508 | |
---|
1509 | typedef UndirGraphAdaptor<Graph> UGraph; |
---|
1510 | |
---|
1511 | typedef ResForwardFilter<Graph, Number, CapacityMap, FlowMap> |
---|
1512 | ForwardFilter; |
---|
1513 | |
---|
1514 | typedef ResBackwardFilter<Graph, Number, CapacityMap, FlowMap> |
---|
1515 | BackwardFilter; |
---|
1516 | |
---|
1517 | typedef typename UGraph:: |
---|
1518 | template CombinedEdgeMap<ForwardFilter, BackwardFilter> |
---|
1519 | EdgeFilter; |
---|
1520 | |
---|
1521 | typedef EdgeSubGraphAdaptor<UGraph, EdgeFilter> Parent; |
---|
1522 | |
---|
1523 | protected: |
---|
1524 | |
---|
1525 | const CapacityMap* capacity; |
---|
1526 | FlowMap* flow; |
---|
1527 | |
---|
1528 | UGraph ugraph; |
---|
1529 | ForwardFilter forward_filter; |
---|
1530 | BackwardFilter backward_filter; |
---|
1531 | EdgeFilter edge_filter; |
---|
1532 | |
---|
1533 | void setCapacityMap(const CapacityMap& _capacity) { |
---|
1534 | capacity=&_capacity; |
---|
1535 | forward_filter.setCapacity(_capacity); |
---|
1536 | backward_filter.setCapacity(_capacity); |
---|
1537 | } |
---|
1538 | |
---|
1539 | void setFlowMap(FlowMap& _flow) { |
---|
1540 | flow=&_flow; |
---|
1541 | forward_filter.setFlow(_flow); |
---|
1542 | backward_filter.setFlow(_flow); |
---|
1543 | } |
---|
1544 | |
---|
1545 | public: |
---|
1546 | |
---|
1547 | ResGraphAdaptor(Graph& _graph, const CapacityMap& _capacity, |
---|
1548 | FlowMap& _flow) |
---|
1549 | : Parent(), capacity(&_capacity), flow(&_flow), |
---|
1550 | ugraph(_graph), |
---|
1551 | forward_filter(_capacity, _flow), |
---|
1552 | backward_filter(_capacity, _flow), |
---|
1553 | edge_filter(forward_filter, backward_filter) { |
---|
1554 | Parent::setGraph(ugraph); |
---|
1555 | Parent::setEdgeFilterMap(edge_filter); |
---|
1556 | } |
---|
1557 | |
---|
1558 | typedef typename Parent::Edge Edge; |
---|
1559 | |
---|
1560 | void augment(const Edge& e, Number a) const { |
---|
1561 | if (UGraph::direction(e)) { |
---|
1562 | flow->set(e, (*flow)[e]+a); |
---|
1563 | } else { |
---|
1564 | flow->set(e, (*flow)[e]-a); |
---|
1565 | } |
---|
1566 | } |
---|
1567 | |
---|
1568 | static bool forward(const Edge& e) { |
---|
1569 | return UGraph::direction(e); |
---|
1570 | } |
---|
1571 | |
---|
1572 | static bool backward(const Edge& e) { |
---|
1573 | return !UGraph::direction(e); |
---|
1574 | } |
---|
1575 | |
---|
1576 | static Edge forward(const typename Graph::Edge& e) { |
---|
1577 | return UGraph::direct(e, true); |
---|
1578 | } |
---|
1579 | |
---|
1580 | static Edge backward(const typename Graph::Edge& e) { |
---|
1581 | return UGraph::direct(e, false); |
---|
1582 | } |
---|
1583 | |
---|
1584 | |
---|
1585 | /// \brief Residual capacity map. |
---|
1586 | /// |
---|
1587 | /// In generic residual graphs the residual capacity can be obtained |
---|
1588 | /// as a map. |
---|
1589 | class ResCap { |
---|
1590 | protected: |
---|
1591 | const ResGraphAdaptor* res_graph; |
---|
1592 | public: |
---|
1593 | typedef Number Value; |
---|
1594 | typedef Edge Key; |
---|
1595 | ResCap(const ResGraphAdaptor& _res_graph) |
---|
1596 | : res_graph(&_res_graph) {} |
---|
1597 | |
---|
1598 | Number operator[](const Edge& e) const { |
---|
1599 | if (ResGraphAdaptor::direction(e)) |
---|
1600 | return (*(res_graph->capacity))[e]-(*(res_graph->flow))[e]; |
---|
1601 | else |
---|
1602 | return (*(res_graph->flow))[e]; |
---|
1603 | } |
---|
1604 | |
---|
1605 | }; |
---|
1606 | |
---|
1607 | }; |
---|
1608 | |
---|
1609 | |
---|
1610 | |
---|
1611 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
1612 | class ErasingFirstGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
---|
1613 | public: |
---|
1614 | typedef _Graph Graph; |
---|
1615 | typedef GraphAdaptorBase<_Graph> Parent; |
---|
1616 | protected: |
---|
1617 | FirstOutEdgesMap* first_out_edges; |
---|
1618 | ErasingFirstGraphAdaptorBase() : Parent(), |
---|
1619 | first_out_edges(0) { } |
---|
1620 | |
---|
1621 | void setFirstOutEdgesMap(FirstOutEdgesMap& _first_out_edges) { |
---|
1622 | first_out_edges=&_first_out_edges; |
---|
1623 | } |
---|
1624 | |
---|
1625 | public: |
---|
1626 | |
---|
1627 | typedef typename Parent::Node Node; |
---|
1628 | typedef typename Parent::Edge Edge; |
---|
1629 | |
---|
1630 | void firstOut(Edge& i, const Node& n) const { |
---|
1631 | i=(*first_out_edges)[n]; |
---|
1632 | } |
---|
1633 | |
---|
1634 | void erase(const Edge& e) const { |
---|
1635 | Node n=source(e); |
---|
1636 | Edge f=e; |
---|
1637 | Parent::nextOut(f); |
---|
1638 | first_out_edges->set(n, f); |
---|
1639 | } |
---|
1640 | }; |
---|
1641 | |
---|
1642 | |
---|
1643 | ///\brief For blocking flows. |
---|
1644 | ///\ingroup graph_adaptors |
---|
1645 | /// |
---|
1646 | ///\warning Graph adaptors are in even more |
---|
1647 | ///experimental state than the other |
---|
1648 | ///parts of the lib. Use them at you own risk. |
---|
1649 | /// |
---|
1650 | ///This graph adaptor is used for on-the-fly |
---|
1651 | ///Dinits blocking flow computations. |
---|
1652 | ///For each node, an out-edge is stored which is used when the |
---|
1653 | ///\code |
---|
1654 | ///OutEdgeIt& first(OutEdgeIt&, const Node&) |
---|
1655 | ///\endcode |
---|
1656 | ///is called. |
---|
1657 | /// |
---|
1658 | ///\author Marton Makai |
---|
1659 | /// |
---|
1660 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
1661 | class ErasingFirstGraphAdaptor : |
---|
1662 | public GraphAdaptorExtender< |
---|
1663 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > { |
---|
1664 | public: |
---|
1665 | typedef _Graph Graph; |
---|
1666 | typedef GraphAdaptorExtender< |
---|
1667 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > Parent; |
---|
1668 | ErasingFirstGraphAdaptor(Graph& _graph, |
---|
1669 | FirstOutEdgesMap& _first_out_edges) { |
---|
1670 | setGraph(_graph); |
---|
1671 | setFirstOutEdgesMap(_first_out_edges); |
---|
1672 | } |
---|
1673 | |
---|
1674 | }; |
---|
1675 | |
---|
1676 | // template <typename _Graph> |
---|
1677 | // class SplitGraphAdaptorBase |
---|
1678 | // : public GraphAdaptorBase<_Graph> { |
---|
1679 | // public: |
---|
1680 | // typedef GraphAdaptorBase<_Graph> Parent; |
---|
1681 | |
---|
1682 | // class Node; |
---|
1683 | // class Edge; |
---|
1684 | // template <typename T> class NodeMap; |
---|
1685 | // template <typename T> class EdgeMap; |
---|
1686 | |
---|
1687 | |
---|
1688 | // class Node : public Parent::Node { |
---|
1689 | // friend class SplitGraphAdaptorBase; |
---|
1690 | // template <typename T> friend class NodeMap; |
---|
1691 | // typedef typename Parent::Node NodeParent; |
---|
1692 | // private: |
---|
1693 | |
---|
1694 | // bool entry; |
---|
1695 | // Node(typename Parent::Node _node, bool _entry) |
---|
1696 | // : Parent::Node(_node), entry(_entry) {} |
---|
1697 | |
---|
1698 | // public: |
---|
1699 | // Node() {} |
---|
1700 | // Node(Invalid) : NodeParent(INVALID), entry(true) {} |
---|
1701 | |
---|
1702 | // bool operator==(const Node& node) const { |
---|
1703 | // return NodeParent::operator==(node) && entry == node.entry; |
---|
1704 | // } |
---|
1705 | |
---|
1706 | // bool operator!=(const Node& node) const { |
---|
1707 | // return !(*this == node); |
---|
1708 | // } |
---|
1709 | |
---|
1710 | // bool operator<(const Node& node) const { |
---|
1711 | // return NodeParent::operator<(node) || |
---|
1712 | // (NodeParent::operator==(node) && entry < node.entry); |
---|
1713 | // } |
---|
1714 | // }; |
---|
1715 | |
---|
1716 | // /// \todo May we want VARIANT/union type |
---|
1717 | // class Edge : public Parent::Edge { |
---|
1718 | // friend class SplitGraphAdaptorBase; |
---|
1719 | // template <typename T> friend class EdgeMap; |
---|
1720 | // private: |
---|
1721 | // typedef typename Parent::Edge EdgeParent; |
---|
1722 | // typedef typename Parent::Node NodeParent; |
---|
1723 | // NodeParent bind; |
---|
1724 | |
---|
1725 | // Edge(const EdgeParent& edge, const NodeParent& node) |
---|
1726 | // : EdgeParent(edge), bind(node) {} |
---|
1727 | // public: |
---|
1728 | // Edge() {} |
---|
1729 | // Edge(Invalid) : EdgeParent(INVALID), bind(INVALID) {} |
---|
1730 | |
---|
1731 | // bool operator==(const Edge& edge) const { |
---|
1732 | // return EdgeParent::operator==(edge) && bind == edge.bind; |
---|
1733 | // } |
---|
1734 | |
---|
1735 | // bool operator!=(const Edge& edge) const { |
---|
1736 | // return !(*this == edge); |
---|
1737 | // } |
---|
1738 | |
---|
1739 | // bool operator<(const Edge& edge) const { |
---|
1740 | // return EdgeParent::operator<(edge) || |
---|
1741 | // (EdgeParent::operator==(edge) && bind < edge.bind); |
---|
1742 | // } |
---|
1743 | // }; |
---|
1744 | |
---|
1745 | // void first(Node& node) const { |
---|
1746 | // Parent::first(node); |
---|
1747 | // node.entry = true; |
---|
1748 | // } |
---|
1749 | |
---|
1750 | // void next(Node& node) const { |
---|
1751 | // if (node.entry) { |
---|
1752 | // node.entry = false; |
---|
1753 | // } else { |
---|
1754 | // node.entry = true; |
---|
1755 | // Parent::next(node); |
---|
1756 | // } |
---|
1757 | // } |
---|
1758 | |
---|
1759 | // void first(Edge& edge) const { |
---|
1760 | // Parent::first(edge); |
---|
1761 | // if ((typename Parent::Edge&)edge == INVALID) { |
---|
1762 | // Parent::first(edge.bind); |
---|
1763 | // } else { |
---|
1764 | // edge.bind = INVALID; |
---|
1765 | // } |
---|
1766 | // } |
---|
1767 | |
---|
1768 | // void next(Edge& edge) const { |
---|
1769 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1770 | // Parent::next(edge); |
---|
1771 | // if ((typename Parent::Edge&)edge == INVALID) { |
---|
1772 | // Parent::first(edge.bind); |
---|
1773 | // } |
---|
1774 | // } else { |
---|
1775 | // Parent::next(edge.bind); |
---|
1776 | // } |
---|
1777 | // } |
---|
1778 | |
---|
1779 | // void firstIn(Edge& edge, const Node& node) const { |
---|
1780 | // if (node.entry) { |
---|
1781 | // Parent::firstIn(edge, node); |
---|
1782 | // edge.bind = INVALID; |
---|
1783 | // } else { |
---|
1784 | // (typename Parent::Edge&)edge = INVALID; |
---|
1785 | // edge.bind = node; |
---|
1786 | // } |
---|
1787 | // } |
---|
1788 | |
---|
1789 | // void nextIn(Edge& edge) const { |
---|
1790 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1791 | // Parent::nextIn(edge); |
---|
1792 | // } else { |
---|
1793 | // edge.bind = INVALID; |
---|
1794 | // } |
---|
1795 | // } |
---|
1796 | |
---|
1797 | // void firstOut(Edge& edge, const Node& node) const { |
---|
1798 | // if (!node.entry) { |
---|
1799 | // Parent::firstOut(edge, node); |
---|
1800 | // edge.bind = INVALID; |
---|
1801 | // } else { |
---|
1802 | // (typename Parent::Edge&)edge = INVALID; |
---|
1803 | // edge.bind = node; |
---|
1804 | // } |
---|
1805 | // } |
---|
1806 | |
---|
1807 | // void nextOut(Edge& edge) const { |
---|
1808 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1809 | // Parent::nextOut(edge); |
---|
1810 | // } else { |
---|
1811 | // edge.bind = INVALID; |
---|
1812 | // } |
---|
1813 | // } |
---|
1814 | |
---|
1815 | // Node source(const Edge& edge) const { |
---|
1816 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1817 | // return Node(Parent::source(edge), false); |
---|
1818 | // } else { |
---|
1819 | // return Node(edge.bind, true); |
---|
1820 | // } |
---|
1821 | // } |
---|
1822 | |
---|
1823 | // Node target(const Edge& edge) const { |
---|
1824 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1825 | // return Node(Parent::target(edge), true); |
---|
1826 | // } else { |
---|
1827 | // return Node(edge.bind, false); |
---|
1828 | // } |
---|
1829 | // } |
---|
1830 | |
---|
1831 | // static bool entryNode(const Node& node) { |
---|
1832 | // return node.entry; |
---|
1833 | // } |
---|
1834 | |
---|
1835 | // static bool exitNode(const Node& node) { |
---|
1836 | // return !node.entry; |
---|
1837 | // } |
---|
1838 | |
---|
1839 | // static Node getEntry(const typename Parent::Node& node) { |
---|
1840 | // return Node(node, true); |
---|
1841 | // } |
---|
1842 | |
---|
1843 | // static Node getExit(const typename Parent::Node& node) { |
---|
1844 | // return Node(node, false); |
---|
1845 | // } |
---|
1846 | |
---|
1847 | // static bool originalEdge(const Edge& edge) { |
---|
1848 | // return (typename Parent::Edge&)edge != INVALID; |
---|
1849 | // } |
---|
1850 | |
---|
1851 | // static bool bindingEdge(const Edge& edge) { |
---|
1852 | // return edge.bind != INVALID; |
---|
1853 | // } |
---|
1854 | |
---|
1855 | // static Node getBindedNode(const Edge& edge) { |
---|
1856 | // return edge.bind; |
---|
1857 | // } |
---|
1858 | |
---|
1859 | // int nodeNum() const { |
---|
1860 | // return Parent::nodeNum() * 2; |
---|
1861 | // } |
---|
1862 | |
---|
1863 | // typedef True EdgeNumTag; |
---|
1864 | |
---|
1865 | // int edgeNum() const { |
---|
1866 | // return countEdges() + Parent::nodeNum(); |
---|
1867 | // } |
---|
1868 | |
---|
1869 | // Edge findEdge(const Node& source, const Node& target, |
---|
1870 | // const Edge& prev = INVALID) const { |
---|
1871 | // if (exitNode(source) && entryNode(target)) { |
---|
1872 | // return Parent::findEdge(source, target, prev); |
---|
1873 | // } else { |
---|
1874 | // if (prev == INVALID && entryNode(source) && exitNode(target) && |
---|
1875 | // (typename Parent::Node&)source == (typename Parent::Node&)target) { |
---|
1876 | // return Edge(INVALID, source); |
---|
1877 | // } else { |
---|
1878 | // return INVALID; |
---|
1879 | // } |
---|
1880 | // } |
---|
1881 | // } |
---|
1882 | |
---|
1883 | // template <typename T> |
---|
1884 | // class NodeMap : public MapBase<Node, T> { |
---|
1885 | // typedef typename Parent::template NodeMap<T> NodeImpl; |
---|
1886 | // public: |
---|
1887 | // NodeMap(const SplitGraphAdaptorBase& _graph) |
---|
1888 | // : entry(_graph), exit(_graph) {} |
---|
1889 | // NodeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
1890 | // : entry(_graph, t), exit(_graph, t) {} |
---|
1891 | |
---|
1892 | // void set(const Node& key, const T& val) { |
---|
1893 | // if (key.entry) { entry.set(key, val); } |
---|
1894 | // else {exit.set(key, val); } |
---|
1895 | // } |
---|
1896 | |
---|
1897 | // typename MapTraits<NodeImpl>::ReturnValue |
---|
1898 | // operator[](const Node& key) { |
---|
1899 | // if (key.entry) { return entry[key]; } |
---|
1900 | // else { return exit[key]; } |
---|
1901 | // } |
---|
1902 | |
---|
1903 | // typename MapTraits<NodeImpl>::ConstReturnValue |
---|
1904 | // operator[](const Node& key) const { |
---|
1905 | // if (key.entry) { return entry[key]; } |
---|
1906 | // else { return exit[key]; } |
---|
1907 | // } |
---|
1908 | |
---|
1909 | // private: |
---|
1910 | // NodeImpl entry, exit; |
---|
1911 | // }; |
---|
1912 | |
---|
1913 | // template <typename T> |
---|
1914 | // class EdgeMap : public MapBase<Edge, T> { |
---|
1915 | // typedef typename Parent::template NodeMap<T> NodeImpl; |
---|
1916 | // typedef typename Parent::template EdgeMap<T> EdgeImpl; |
---|
1917 | // public: |
---|
1918 | // EdgeMap(const SplitGraphAdaptorBase& _graph) |
---|
1919 | // : bind(_graph), orig(_graph) {} |
---|
1920 | // EdgeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
1921 | // : bind(_graph, t), orig(_graph, t) {} |
---|
1922 | |
---|
1923 | // void set(const Edge& key, const T& val) { |
---|
1924 | // if ((typename Parent::Edge&)key != INVALID) { orig.set(key, val); } |
---|
1925 | // else {bind.set(key.bind, val); } |
---|
1926 | // } |
---|
1927 | |
---|
1928 | // typename MapTraits<EdgeImpl>::ReturnValue |
---|
1929 | // operator[](const Edge& key) { |
---|
1930 | // if ((typename Parent::Edge&)key != INVALID) { return orig[key]; } |
---|
1931 | // else {return bind[key.bind]; } |
---|
1932 | // } |
---|
1933 | |
---|
1934 | // typename MapTraits<EdgeImpl>::ConstReturnValue |
---|
1935 | // operator[](const Edge& key) const { |
---|
1936 | // if ((typename Parent::Edge&)key != INVALID) { return orig[key]; } |
---|
1937 | // else {return bind[key.bind]; } |
---|
1938 | // } |
---|
1939 | |
---|
1940 | // private: |
---|
1941 | // typename Parent::template NodeMap<T> bind; |
---|
1942 | // typename Parent::template EdgeMap<T> orig; |
---|
1943 | // }; |
---|
1944 | |
---|
1945 | // template <typename EntryMap, typename ExitMap> |
---|
1946 | // class CombinedNodeMap : public MapBase<Node, typename EntryMap::Value> { |
---|
1947 | // public: |
---|
1948 | // typedef MapBase<Node, typename EntryMap::Value> Parent; |
---|
1949 | |
---|
1950 | // typedef typename Parent::Key Key; |
---|
1951 | // typedef typename Parent::Value Value; |
---|
1952 | |
---|
1953 | // CombinedNodeMap(EntryMap& _entryMap, ExitMap& _exitMap) |
---|
1954 | // : entryMap(_entryMap), exitMap(_exitMap) {} |
---|
1955 | |
---|
1956 | // Value& operator[](const Key& key) { |
---|
1957 | // if (key.entry) { |
---|
1958 | // return entryMap[key]; |
---|
1959 | // } else { |
---|
1960 | // return exitMap[key]; |
---|
1961 | // } |
---|
1962 | // } |
---|
1963 | |
---|
1964 | // Value operator[](const Key& key) const { |
---|
1965 | // if (key.entry) { |
---|
1966 | // return entryMap[key]; |
---|
1967 | // } else { |
---|
1968 | // return exitMap[key]; |
---|
1969 | // } |
---|
1970 | // } |
---|
1971 | |
---|
1972 | // void set(const Key& key, const Value& value) { |
---|
1973 | // if (key.entry) { |
---|
1974 | // entryMap.set(key, value); |
---|
1975 | // } else { |
---|
1976 | // exitMap.set(key, value); |
---|
1977 | // } |
---|
1978 | // } |
---|
1979 | |
---|
1980 | // private: |
---|
1981 | |
---|
1982 | // EntryMap& entryMap; |
---|
1983 | // ExitMap& exitMap; |
---|
1984 | |
---|
1985 | // }; |
---|
1986 | |
---|
1987 | // template <typename EdgeMap, typename NodeMap> |
---|
1988 | // class CombinedEdgeMap : public MapBase<Edge, typename EdgeMap::Value> { |
---|
1989 | // public: |
---|
1990 | // typedef MapBase<Edge, typename EdgeMap::Value> Parent; |
---|
1991 | |
---|
1992 | // typedef typename Parent::Key Key; |
---|
1993 | // typedef typename Parent::Value Value; |
---|
1994 | |
---|
1995 | // CombinedEdgeMap(EdgeMap& _edgeMap, NodeMap& _nodeMap) |
---|
1996 | // : edgeMap(_edgeMap), nodeMap(_nodeMap) {} |
---|
1997 | |
---|
1998 | // void set(const Edge& edge, const Value& val) { |
---|
1999 | // if (SplitGraphAdaptorBase::originalEdge(edge)) { |
---|
2000 | // edgeMap.set(edge, val); |
---|
2001 | // } else { |
---|
2002 | // nodeMap.set(SplitGraphAdaptorBase::bindedNode(edge), val); |
---|
2003 | // } |
---|
2004 | // } |
---|
2005 | |
---|
2006 | // Value operator[](const Key& edge) const { |
---|
2007 | // if (SplitGraphAdaptorBase::originalEdge(edge)) { |
---|
2008 | // return edgeMap[edge]; |
---|
2009 | // } else { |
---|
2010 | // return nodeMap[SplitGraphAdaptorBase::bindedNode(edge)]; |
---|
2011 | // } |
---|
2012 | // } |
---|
2013 | |
---|
2014 | // Value& operator[](const Key& edge) { |
---|
2015 | // if (SplitGraphAdaptorBase::originalEdge(edge)) { |
---|
2016 | // return edgeMap[edge]; |
---|
2017 | // } else { |
---|
2018 | // return nodeMap[SplitGraphAdaptorBase::bindedNode(edge)]; |
---|
2019 | // } |
---|
2020 | // } |
---|
2021 | |
---|
2022 | // private: |
---|
2023 | // EdgeMap& edgeMap; |
---|
2024 | // NodeMap& nodeMap; |
---|
2025 | // }; |
---|
2026 | |
---|
2027 | // }; |
---|
2028 | |
---|
2029 | // template <typename _Graph> |
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2030 | // class SplitGraphAdaptor |
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2031 | // : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
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2032 | // public: |
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2033 | // typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
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2034 | |
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2035 | // SplitGraphAdaptor(_Graph& graph) { |
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2036 | // Parent::setGraph(graph); |
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2037 | // } |
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2038 | |
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2039 | |
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2040 | // }; |
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2041 | |
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2042 | } //namespace lemon |
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2043 | |
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2044 | #endif //LEMON_GRAPH_ADAPTOR_H |
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2045 | |
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