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) 2003-2008 |
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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_BITS_EDGE_SET_EXTENDER_H |
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20 | #define LEMON_BITS_EDGE_SET_EXTENDER_H |
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21 | |
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22 | #include <lemon/error.h> |
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23 | #include <lemon/bits/default_map.h> |
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24 | |
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25 | ///\ingroup digraphbits |
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26 | ///\file |
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27 | ///\brief Extenders for the arc set types |
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28 | namespace lemon { |
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29 | |
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30 | /// \ingroup digraphbits |
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31 | /// |
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32 | /// \brief Extender for the ArcSets |
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33 | template <typename Base> |
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34 | class ArcSetExtender : public Base { |
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35 | public: |
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36 | |
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37 | typedef Base Parent; |
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38 | typedef ArcSetExtender Digraph; |
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39 | |
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40 | // Base extensions |
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41 | |
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42 | typedef typename Parent::Node Node; |
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43 | typedef typename Parent::Arc Arc; |
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44 | |
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45 | int maxId(Node) const { |
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46 | return Parent::maxNodeId(); |
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47 | } |
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48 | |
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49 | int maxId(Arc) const { |
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50 | return Parent::maxArcId(); |
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51 | } |
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52 | |
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53 | Node fromId(int id, Node) const { |
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54 | return Parent::nodeFromId(id); |
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55 | } |
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56 | |
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57 | Arc fromId(int id, Arc) const { |
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58 | return Parent::arcFromId(id); |
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59 | } |
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60 | |
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61 | Node oppositeNode(const Node &n, const Arc &e) const { |
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62 | if (n == Parent::source(e)) |
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63 | return Parent::target(e); |
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64 | else if(n==Parent::target(e)) |
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65 | return Parent::source(e); |
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66 | else |
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67 | return INVALID; |
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68 | } |
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69 | |
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70 | |
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71 | // Alteration notifier extensions |
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72 | |
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73 | /// The arc observer registry. |
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74 | typedef AlterationNotifier<ArcSetExtender, Arc> ArcNotifier; |
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75 | |
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76 | protected: |
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77 | |
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78 | mutable ArcNotifier arc_notifier; |
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79 | |
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80 | public: |
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81 | |
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82 | using Parent::notifier; |
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83 | |
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84 | /// \brief Gives back the arc alteration notifier. |
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85 | /// |
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86 | /// Gives back the arc alteration notifier. |
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87 | ArcNotifier& notifier(Arc) const { |
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88 | return arc_notifier; |
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89 | } |
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90 | |
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91 | // Iterable extensions |
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92 | |
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93 | class NodeIt : public Node { |
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94 | const Digraph* digraph; |
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95 | public: |
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96 | |
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97 | NodeIt() {} |
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98 | |
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99 | NodeIt(Invalid i) : Node(i) { } |
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100 | |
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101 | explicit NodeIt(const Digraph& _graph) : digraph(&_graph) { |
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102 | _graph.first(static_cast<Node&>(*this)); |
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103 | } |
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104 | |
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105 | NodeIt(const Digraph& _graph, const Node& node) |
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106 | : Node(node), digraph(&_graph) {} |
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107 | |
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108 | NodeIt& operator++() { |
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109 | digraph->next(*this); |
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110 | return *this; |
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111 | } |
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112 | |
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113 | }; |
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114 | |
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115 | |
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116 | class ArcIt : public Arc { |
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117 | const Digraph* digraph; |
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118 | public: |
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119 | |
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120 | ArcIt() { } |
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121 | |
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122 | ArcIt(Invalid i) : Arc(i) { } |
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123 | |
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124 | explicit ArcIt(const Digraph& _graph) : digraph(&_graph) { |
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125 | _graph.first(static_cast<Arc&>(*this)); |
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126 | } |
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127 | |
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128 | ArcIt(const Digraph& _graph, const Arc& e) : |
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129 | Arc(e), digraph(&_graph) { } |
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130 | |
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131 | ArcIt& operator++() { |
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132 | digraph->next(*this); |
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133 | return *this; |
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134 | } |
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135 | |
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136 | }; |
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137 | |
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138 | |
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139 | class OutArcIt : public Arc { |
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140 | const Digraph* digraph; |
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141 | public: |
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142 | |
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143 | OutArcIt() { } |
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144 | |
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145 | OutArcIt(Invalid i) : Arc(i) { } |
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146 | |
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147 | OutArcIt(const Digraph& _graph, const Node& node) |
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148 | : digraph(&_graph) { |
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149 | _graph.firstOut(*this, node); |
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150 | } |
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151 | |
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152 | OutArcIt(const Digraph& _graph, const Arc& arc) |
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153 | : Arc(arc), digraph(&_graph) {} |
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154 | |
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155 | OutArcIt& operator++() { |
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156 | digraph->nextOut(*this); |
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157 | return *this; |
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158 | } |
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159 | |
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160 | }; |
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161 | |
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162 | |
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163 | class InArcIt : public Arc { |
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164 | const Digraph* digraph; |
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165 | public: |
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166 | |
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167 | InArcIt() { } |
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168 | |
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169 | InArcIt(Invalid i) : Arc(i) { } |
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170 | |
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171 | InArcIt(const Digraph& _graph, const Node& node) |
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172 | : digraph(&_graph) { |
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173 | _graph.firstIn(*this, node); |
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174 | } |
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175 | |
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176 | InArcIt(const Digraph& _graph, const Arc& arc) : |
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177 | Arc(arc), digraph(&_graph) {} |
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178 | |
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179 | InArcIt& operator++() { |
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180 | digraph->nextIn(*this); |
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181 | return *this; |
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182 | } |
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183 | |
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184 | }; |
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185 | |
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186 | /// \brief Base node of the iterator |
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187 | /// |
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188 | /// Returns the base node (ie. the source in this case) of the iterator |
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189 | Node baseNode(const OutArcIt &e) const { |
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190 | return Parent::source(static_cast<const Arc&>(e)); |
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191 | } |
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192 | /// \brief Running node of the iterator |
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193 | /// |
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194 | /// Returns the running node (ie. the target in this case) of the |
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195 | /// iterator |
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196 | Node runningNode(const OutArcIt &e) const { |
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197 | return Parent::target(static_cast<const Arc&>(e)); |
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198 | } |
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199 | |
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200 | /// \brief Base node of the iterator |
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201 | /// |
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202 | /// Returns the base node (ie. the target in this case) of the iterator |
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203 | Node baseNode(const InArcIt &e) const { |
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204 | return Parent::target(static_cast<const Arc&>(e)); |
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205 | } |
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206 | /// \brief Running node of the iterator |
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207 | /// |
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208 | /// Returns the running node (ie. the source in this case) of the |
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209 | /// iterator |
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210 | Node runningNode(const InArcIt &e) const { |
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211 | return Parent::source(static_cast<const Arc&>(e)); |
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212 | } |
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213 | |
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214 | using Parent::first; |
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215 | |
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216 | // Mappable extension |
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217 | |
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218 | template <typename _Value> |
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219 | class ArcMap |
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220 | : public MapExtender<DefaultMap<Digraph, Arc, _Value> > { |
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221 | public: |
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222 | typedef ArcSetExtender Digraph; |
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223 | typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent; |
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224 | |
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225 | explicit ArcMap(const Digraph& _g) |
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226 | : Parent(_g) {} |
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227 | ArcMap(const Digraph& _g, const _Value& _v) |
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228 | : Parent(_g, _v) {} |
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229 | |
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230 | ArcMap& operator=(const ArcMap& cmap) { |
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231 | return operator=<ArcMap>(cmap); |
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232 | } |
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233 | |
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234 | template <typename CMap> |
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235 | ArcMap& operator=(const CMap& cmap) { |
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236 | Parent::operator=(cmap); |
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237 | return *this; |
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238 | } |
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239 | |
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240 | }; |
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241 | |
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242 | |
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243 | // Alteration extension |
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244 | |
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245 | Arc addArc(const Node& from, const Node& to) { |
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246 | Arc arc = Parent::addArc(from, to); |
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247 | notifier(Arc()).add(arc); |
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248 | return arc; |
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249 | } |
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250 | |
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251 | void clear() { |
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252 | notifier(Arc()).clear(); |
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253 | Parent::clear(); |
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254 | } |
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255 | |
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256 | void erase(const Arc& arc) { |
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257 | notifier(Arc()).erase(arc); |
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258 | Parent::erase(arc); |
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259 | } |
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260 | |
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261 | ArcSetExtender() { |
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262 | arc_notifier.setContainer(*this); |
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263 | } |
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264 | |
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265 | ~ArcSetExtender() { |
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266 | arc_notifier.clear(); |
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267 | } |
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268 | |
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269 | }; |
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270 | |
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271 | |
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272 | /// \ingroup digraphbits |
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273 | /// |
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274 | /// \brief Extender for the EdgeSets |
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275 | template <typename Base> |
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276 | class EdgeSetExtender : public Base { |
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277 | |
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278 | public: |
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279 | |
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280 | typedef Base Parent; |
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281 | typedef EdgeSetExtender Digraph; |
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282 | |
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283 | typedef typename Parent::Node Node; |
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284 | typedef typename Parent::Arc Arc; |
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285 | typedef typename Parent::Edge Edge; |
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286 | |
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287 | |
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288 | int maxId(Node) const { |
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289 | return Parent::maxNodeId(); |
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290 | } |
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291 | |
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292 | int maxId(Arc) const { |
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293 | return Parent::maxArcId(); |
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294 | } |
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295 | |
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296 | int maxId(Edge) const { |
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297 | return Parent::maxEdgeId(); |
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298 | } |
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299 | |
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300 | Node fromId(int id, Node) const { |
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301 | return Parent::nodeFromId(id); |
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302 | } |
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303 | |
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304 | Arc fromId(int id, Arc) const { |
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305 | return Parent::arcFromId(id); |
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306 | } |
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307 | |
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308 | Edge fromId(int id, Edge) const { |
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309 | return Parent::edgeFromId(id); |
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310 | } |
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311 | |
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312 | Node oppositeNode(const Node &n, const Edge &e) const { |
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313 | if( n == Parent::u(e)) |
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314 | return Parent::v(e); |
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315 | else if( n == Parent::v(e)) |
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316 | return Parent::u(e); |
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317 | else |
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318 | return INVALID; |
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319 | } |
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320 | |
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321 | Arc oppositeArc(const Arc &e) const { |
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322 | return Parent::direct(e, !Parent::direction(e)); |
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323 | } |
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324 | |
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325 | using Parent::direct; |
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326 | Arc direct(const Edge &e, const Node &s) const { |
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327 | return Parent::direct(e, Parent::u(e) == s); |
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328 | } |
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329 | |
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330 | typedef AlterationNotifier<EdgeSetExtender, Arc> ArcNotifier; |
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331 | typedef AlterationNotifier<EdgeSetExtender, Edge> EdgeNotifier; |
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332 | |
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333 | |
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334 | protected: |
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335 | |
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336 | mutable ArcNotifier arc_notifier; |
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337 | mutable EdgeNotifier edge_notifier; |
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338 | |
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339 | public: |
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340 | |
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341 | using Parent::notifier; |
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342 | |
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343 | ArcNotifier& notifier(Arc) const { |
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344 | return arc_notifier; |
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345 | } |
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346 | |
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347 | EdgeNotifier& notifier(Edge) const { |
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348 | return edge_notifier; |
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349 | } |
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350 | |
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351 | |
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352 | class NodeIt : public Node { |
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353 | const Digraph* digraph; |
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354 | public: |
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355 | |
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356 | NodeIt() {} |
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357 | |
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358 | NodeIt(Invalid i) : Node(i) { } |
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359 | |
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360 | explicit NodeIt(const Digraph& _graph) : digraph(&_graph) { |
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361 | _graph.first(static_cast<Node&>(*this)); |
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362 | } |
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363 | |
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364 | NodeIt(const Digraph& _graph, const Node& node) |
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365 | : Node(node), digraph(&_graph) {} |
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366 | |
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367 | NodeIt& operator++() { |
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368 | digraph->next(*this); |
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369 | return *this; |
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370 | } |
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371 | |
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372 | }; |
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373 | |
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374 | |
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375 | class ArcIt : public Arc { |
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376 | const Digraph* digraph; |
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377 | public: |
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378 | |
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379 | ArcIt() { } |
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380 | |
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381 | ArcIt(Invalid i) : Arc(i) { } |
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382 | |
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383 | explicit ArcIt(const Digraph& _graph) : digraph(&_graph) { |
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384 | _graph.first(static_cast<Arc&>(*this)); |
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385 | } |
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386 | |
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387 | ArcIt(const Digraph& _graph, const Arc& e) : |
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388 | Arc(e), digraph(&_graph) { } |
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389 | |
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390 | ArcIt& operator++() { |
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391 | digraph->next(*this); |
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392 | return *this; |
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393 | } |
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394 | |
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395 | }; |
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396 | |
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397 | |
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398 | class OutArcIt : public Arc { |
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399 | const Digraph* digraph; |
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400 | public: |
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401 | |
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402 | OutArcIt() { } |
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403 | |
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404 | OutArcIt(Invalid i) : Arc(i) { } |
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405 | |
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406 | OutArcIt(const Digraph& _graph, const Node& node) |
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407 | : digraph(&_graph) { |
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408 | _graph.firstOut(*this, node); |
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409 | } |
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410 | |
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411 | OutArcIt(const Digraph& _graph, const Arc& arc) |
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412 | : Arc(arc), digraph(&_graph) {} |
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413 | |
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414 | OutArcIt& operator++() { |
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415 | digraph->nextOut(*this); |
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416 | return *this; |
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417 | } |
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418 | |
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419 | }; |
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420 | |
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421 | |
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422 | class InArcIt : public Arc { |
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423 | const Digraph* digraph; |
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424 | public: |
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425 | |
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426 | InArcIt() { } |
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427 | |
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428 | InArcIt(Invalid i) : Arc(i) { } |
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429 | |
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430 | InArcIt(const Digraph& _graph, const Node& node) |
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431 | : digraph(&_graph) { |
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432 | _graph.firstIn(*this, node); |
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433 | } |
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434 | |
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435 | InArcIt(const Digraph& _graph, const Arc& arc) : |
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436 | Arc(arc), digraph(&_graph) {} |
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437 | |
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438 | InArcIt& operator++() { |
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439 | digraph->nextIn(*this); |
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440 | return *this; |
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441 | } |
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442 | |
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443 | }; |
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444 | |
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445 | |
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446 | class EdgeIt : public Parent::Edge { |
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447 | const Digraph* digraph; |
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448 | public: |
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449 | |
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450 | EdgeIt() { } |
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451 | |
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452 | EdgeIt(Invalid i) : Edge(i) { } |
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453 | |
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454 | explicit EdgeIt(const Digraph& _graph) : digraph(&_graph) { |
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455 | _graph.first(static_cast<Edge&>(*this)); |
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456 | } |
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457 | |
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458 | EdgeIt(const Digraph& _graph, const Edge& e) : |
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459 | Edge(e), digraph(&_graph) { } |
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460 | |
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461 | EdgeIt& operator++() { |
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462 | digraph->next(*this); |
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463 | return *this; |
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464 | } |
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465 | |
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466 | }; |
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467 | |
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468 | class IncEdgeIt : public Parent::Edge { |
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469 | friend class EdgeSetExtender; |
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470 | const Digraph* digraph; |
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471 | bool direction; |
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472 | public: |
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473 | |
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474 | IncEdgeIt() { } |
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475 | |
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476 | IncEdgeIt(Invalid i) : Edge(i), direction(false) { } |
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477 | |
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478 | IncEdgeIt(const Digraph& _graph, const Node &n) : digraph(&_graph) { |
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479 | _graph.firstInc(*this, direction, n); |
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480 | } |
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481 | |
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482 | IncEdgeIt(const Digraph& _graph, const Edge &ue, const Node &n) |
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483 | : digraph(&_graph), Edge(ue) { |
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484 | direction = (_graph.source(ue) == n); |
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485 | } |
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486 | |
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487 | IncEdgeIt& operator++() { |
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488 | digraph->nextInc(*this, direction); |
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489 | return *this; |
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490 | } |
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491 | }; |
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492 | |
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493 | /// \brief Base node of the iterator |
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494 | /// |
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495 | /// Returns the base node (ie. the source in this case) of the iterator |
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496 | Node baseNode(const OutArcIt &e) const { |
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497 | return Parent::source(static_cast<const Arc&>(e)); |
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498 | } |
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499 | /// \brief Running node of the iterator |
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500 | /// |
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501 | /// Returns the running node (ie. the target in this case) of the |
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502 | /// iterator |
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503 | Node runningNode(const OutArcIt &e) const { |
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504 | return Parent::target(static_cast<const Arc&>(e)); |
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505 | } |
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506 | |
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507 | /// \brief Base node of the iterator |
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508 | /// |
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509 | /// Returns the base node (ie. the target in this case) of the iterator |
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510 | Node baseNode(const InArcIt &e) const { |
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511 | return Parent::target(static_cast<const Arc&>(e)); |
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512 | } |
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513 | /// \brief Running node of the iterator |
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514 | /// |
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515 | /// Returns the running node (ie. the source in this case) of the |
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516 | /// iterator |
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517 | Node runningNode(const InArcIt &e) const { |
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518 | return Parent::source(static_cast<const Arc&>(e)); |
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519 | } |
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520 | |
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521 | /// Base node of the iterator |
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522 | /// |
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523 | /// Returns the base node of the iterator |
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524 | Node baseNode(const IncEdgeIt &e) const { |
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525 | return e.direction ? u(e) : v(e); |
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526 | } |
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527 | /// Running node of the iterator |
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528 | /// |
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529 | /// Returns the running node of the iterator |
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530 | Node runningNode(const IncEdgeIt &e) const { |
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531 | return e.direction ? v(e) : u(e); |
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532 | } |
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533 | |
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534 | |
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535 | template <typename _Value> |
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536 | class ArcMap |
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537 | : public MapExtender<DefaultMap<Digraph, Arc, _Value> > { |
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538 | public: |
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539 | typedef EdgeSetExtender Digraph; |
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540 | typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent; |
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541 | |
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542 | ArcMap(const Digraph& _g) |
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543 | : Parent(_g) {} |
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544 | ArcMap(const Digraph& _g, const _Value& _v) |
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545 | : Parent(_g, _v) {} |
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546 | |
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547 | ArcMap& operator=(const ArcMap& cmap) { |
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548 | return operator=<ArcMap>(cmap); |
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549 | } |
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550 | |
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551 | template <typename CMap> |
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552 | ArcMap& operator=(const CMap& cmap) { |
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553 | Parent::operator=(cmap); |
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554 | return *this; |
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555 | } |
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556 | |
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557 | }; |
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558 | |
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559 | |
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560 | template <typename _Value> |
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561 | class EdgeMap |
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562 | : public MapExtender<DefaultMap<Digraph, Edge, _Value> > { |
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563 | public: |
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564 | typedef EdgeSetExtender Digraph; |
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565 | typedef MapExtender<DefaultMap<Digraph, Edge, _Value> > Parent; |
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566 | |
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567 | EdgeMap(const Digraph& _g) |
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568 | : Parent(_g) {} |
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569 | |
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570 | EdgeMap(const Digraph& _g, const _Value& _v) |
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571 | : Parent(_g, _v) {} |
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572 | |
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573 | EdgeMap& operator=(const EdgeMap& cmap) { |
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574 | return operator=<EdgeMap>(cmap); |
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575 | } |
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576 | |
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577 | template <typename CMap> |
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578 | EdgeMap& operator=(const CMap& cmap) { |
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579 | Parent::operator=(cmap); |
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580 | return *this; |
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581 | } |
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582 | |
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583 | }; |
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584 | |
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585 | |
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586 | // Alteration extension |
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587 | |
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588 | Edge addEdge(const Node& from, const Node& to) { |
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589 | Edge edge = Parent::addEdge(from, to); |
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590 | notifier(Edge()).add(edge); |
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591 | std::vector<Arc> arcs; |
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592 | arcs.push_back(Parent::direct(edge, true)); |
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593 | arcs.push_back(Parent::direct(edge, false)); |
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594 | notifier(Arc()).add(arcs); |
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595 | return edge; |
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596 | } |
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597 | |
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598 | void clear() { |
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599 | notifier(Arc()).clear(); |
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600 | notifier(Edge()).clear(); |
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601 | Parent::clear(); |
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602 | } |
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603 | |
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604 | void erase(const Edge& edge) { |
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605 | std::vector<Arc> arcs; |
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606 | arcs.push_back(Parent::direct(edge, true)); |
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607 | arcs.push_back(Parent::direct(edge, false)); |
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608 | notifier(Arc()).erase(arcs); |
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609 | notifier(Edge()).erase(edge); |
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610 | Parent::erase(edge); |
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611 | } |
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612 | |
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613 | |
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614 | EdgeSetExtender() { |
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615 | arc_notifier.setContainer(*this); |
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616 | edge_notifier.setContainer(*this); |
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617 | } |
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618 | |
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619 | ~EdgeSetExtender() { |
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620 | edge_notifier.clear(); |
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621 | arc_notifier.clear(); |
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622 | } |
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623 | |
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624 | }; |
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625 | |
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626 | } |
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627 | |
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628 | #endif |
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